his._view;\r\n\r\n\t\tif (vm) {\r\n\t\t\tvar pointRelativePosition = helpers$1.getAngleFromPoint(vm, {x: chartX, y: chartY});\r\n\t\t\tvar angle = pointRelativePosition.angle;\r\n\t\t\tvar distance = pointRelativePosition.distance;\r\n\r\n\t\t\t// Sanitise angle range\r\n\t\t\tvar startAngle = vm.startAngle;\r\n\t\t\tvar endAngle = vm.endAngle;\r\n\t\t\twhile (endAngle < startAngle) {\r\n\t\t\t\tendAngle += TAU;\r\n\t\t\t}\r\n\t\t\twhile (angle > endAngle) {\r\n\t\t\t\tangle -= TAU;\r\n\t\t\t}\r\n\t\t\twhile (angle < startAngle) {\r\n\t\t\t\tangle += TAU;\r\n\t\t\t}\r\n\r\n\t\t\t// Check if within the range of the open/close angle\r\n\t\t\tvar betweenAngles = (angle >= startAngle && angle <= endAngle);\r\n\t\t\tvar withinRadius = (distance >= vm.innerRadius && distance <= vm.outerRadius);\r\n\r\n\t\t\treturn (betweenAngles && withinRadius);\r\n\t\t}\r\n\t\treturn false;\r\n\t},\r\n\r\n\tgetCenterPoint: function() {\r\n\t\tvar vm = this._view;\r\n\t\tvar halfAngle = (vm.startAngle + vm.endAngle) / 2;\r\n\t\tvar halfRadius = (vm.innerRadius + vm.outerRadius) / 2;\r\n\t\treturn {\r\n\t\t\tx: vm.x + Math.cos(halfAngle) * halfRadius,\r\n\t\t\ty: vm.y + Math.sin(halfAngle) * halfRadius\r\n\t\t};\r\n\t},\r\n\r\n\tgetArea: function() {\r\n\t\tvar vm = this._view;\r\n\t\treturn Math.PI * ((vm.endAngle - vm.startAngle) / (2 * Math.PI)) * (Math.pow(vm.outerRadius, 2) - Math.pow(vm.innerRadius, 2));\r\n\t},\r\n\r\n\ttooltipPosition: function() {\r\n\t\tvar vm = this._view;\r\n\t\tvar centreAngle = vm.startAngle + ((vm.endAngle - vm.startAngle) / 2);\r\n\t\tvar rangeFromCentre = (vm.outerRadius - vm.innerRadius) / 2 + vm.innerRadius;\r\n\r\n\t\treturn {\r\n\t\t\tx: vm.x + (Math.cos(centreAngle) * rangeFromCentre),\r\n\t\t\ty: vm.y + (Math.sin(centreAngle) * rangeFromCentre)\r\n\t\t};\r\n\t},\r\n\r\n\tdraw: function() {\r\n\t\tvar ctx = this._chart.ctx;\r\n\t\tvar vm = this._view;\r\n\t\tvar pixelMargin = (vm.borderAlign === 'inner') ? 0.33 : 0;\r\n\t\tvar arc = {\r\n\t\t\tx: vm.x,\r\n\t\t\ty: vm.y,\r\n\t\t\tinnerRadius: vm.innerRadius,\r\n\t\t\touterRadius: Math.max(vm.outerRadius - pixelMargin, 0),\r\n\t\t\tpixelMargin: pixelMargin,\r\n\t\t\tstartAngle: vm.startAngle,\r\n\t\t\tendAngle: vm.endAngle,\r\n\t\t\tfullCircles: Math.floor(vm.circumference / TAU)\r\n\t\t};\r\n\t\tvar i;\r\n\r\n\t\tctx.save();\r\n\r\n\t\tctx.fillStyle = vm.backgroundColor;\r\n\t\tctx.strokeStyle = vm.borderColor;\r\n\r\n\t\tif (arc.fullCircles) {\r\n\t\t\tarc.endAngle = arc.startAngle + TAU;\r\n\t\t\tctx.beginPath();\r\n\t\t\tctx.arc(arc.x, arc.y, arc.outerRadius, arc.startAngle, arc.endAngle);\r\n\t\t\tctx.arc(arc.x, arc.y, arc.innerRadius, arc.endAngle, arc.startAngle, true);\r\n\t\t\tctx.closePath();\r\n\t\t\tfor (i = 0; i < arc.fullCircles; ++i) {\r\n\t\t\t\tctx.fill();\r\n\t\t\t}\r\n\t\t\tarc.endAngle = arc.startAngle + vm.circumference % TAU;\r\n\t\t}\r\n\r\n\t\tctx.beginPath();\r\n\t\tctx.arc(arc.x, arc.y, arc.outerRadius, arc.startAngle, arc.endAngle);\r\n\t\tctx.arc(arc.x, arc.y, arc.innerRadius, arc.endAngle, arc.startAngle, true);\r\n\t\tctx.closePath();\r\n\t\tctx.fill();\r\n\r\n\t\tif (vm.borderWidth) {\r\n\t\t\tdrawBorder(ctx, vm, arc);\r\n\t\t}\r\n\r\n\t\tctx.restore();\r\n\t}\r\n});\n\nvar valueOrDefault$1 = helpers$1.valueOrDefault;\r\n\r\nvar defaultColor = core_defaults.global.defaultColor;\r\n\r\ncore_defaults._set('global', {\r\n\telements: {\r\n\t\tline: {\r\n\t\t\ttension: 0.4,\r\n\t\t\tbackgroundColor: defaultColor,\r\n\t\t\tborderWidth: 3,\r\n\t\t\tborderColor: defaultColor,\r\n\t\t\tborderCapStyle: 'butt',\r\n\t\t\tborderDash: [],\r\n\t\t\tborderDashOffset: 0.0,\r\n\t\t\tborderJoinStyle: 'miter',\r\n\t\t\tcapBezierPoints: true,\r\n\t\t\tfill: true, // do we fill in the area between the line and its base axis\r\n\t\t}\r\n\t}\r\n});\r\n\r\nvar element_line = core_element.extend({\r\n\t_type: 'line',\r\n\r\n\tdraw: function() {\r\n\t\tvar me = this;\r\n\t\tvar vm = me._view;\r\n\t\tvar ctx = me._chart.ctx;\r\n\t\tvar spanGaps = vm.spanGaps;\r\n\t\tvar points = me._children.slice(); // clone array\r\n\t\tvar globalDefaults = core_defaults.global;\r\n\t\tvar globalOptionLineElements = globalDefaults.elements.line;\r\n\t\tvar lastDrawnIndex = -1;\r\n\t\tvar closePath = me._loop;\r\n\t\tvar index, previous, currentVM;\r\n\r\n\t\tif (!points.length) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tif (me._loop) {\r\n\t\t\tfor (index = 0; index < points.length; ++index) {\r\n\t\t\t\tprevious = helpers$1.previousItem(points, index);\r\n\t\t\t\t// If the line has an open path, shift the point array\r\n\t\t\t\tif (!points[index]._view.skip && previous._view.skip) {\r\n\t\t\t\t\tpoints = points.slice(index).concat(points.slice(0, index));\r\n\t\t\t\t\tclosePath = spanGaps;\r\n\t\t\t\t\tbreak;\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t\t// If the line has a close path, add the first point again\r\n\t\t\tif (closePath) {\r\n\t\t\t\tpoints.push(points[0]);\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\tctx.save();\r\n\r\n\t\t// Stroke Line Options\r\n\t\tctx.lineCap = vm.borderCapStyle || globalOptionLineElements.borderCapStyle;\r\n\r\n\t\t// IE 9 and 10 do not support line dash\r\n\t\tif (ctx.setLineDash) {\r\n\t\t\tctx.setLineDash(vm.borderDash || globalOptionLineElements.borderDash);\r\n\t\t}\r\n\r\n\t\tctx.lineDashOffset = valueOrDefault$1(vm.borderDashOffset, globalOptionLineElements.borderDashOffset);\r\n\t\tctx.lineJoin = vm.borderJoinStyle || globalOptionLineElements.borderJoinStyle;\r\n\t\tctx.lineWidth = valueOrDefault$1(vm.borderWidth, globalOptionLineElements.borderWidth);\r\n\t\tctx.strokeStyle = vm.borderColor || globalDefaults.defaultColor;\r\n\r\n\t\t// Stroke Line\r\n\t\tctx.beginPath();\r\n\r\n\t\t// First point moves to it's starting position no matter what\r\n\t\tcurrentVM = points[0]._view;\r\n\t\tif (!currentVM.skip) {\r\n\t\t\tctx.moveTo(currentVM.x, currentVM.y);\r\n\t\t\tlastDrawnIndex = 0;\r\n\t\t}\r\n\r\n\t\tfor (index = 1; index < points.length; ++index) {\r\n\t\t\tcurrentVM = points[index]._view;\r\n\t\t\tprevious = lastDrawnIndex === -1 ? helpers$1.previousItem(points, index) : points[lastDrawnIndex];\r\n\r\n\t\t\tif (!currentVM.skip) {\r\n\t\t\t\tif ((lastDrawnIndex !== (index - 1) && !spanGaps) || lastDrawnIndex === -1) {\r\n\t\t\t\t\t// There was a gap and this is the first point after the gap\r\n\t\t\t\t\tctx.moveTo(currentVM.x, currentVM.y);\r\n\t\t\t\t} else {\r\n\t\t\t\t\t// Line to next point\r\n\t\t\t\t\thelpers$1.canvas.lineTo(ctx, previous._view, currentVM);\r\n\t\t\t\t}\r\n\t\t\t\tlastDrawnIndex = index;\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\tif (closePath) {\r\n\t\t\tctx.closePath();\r\n\t\t}\r\n\r\n\t\tctx.stroke();\r\n\t\tctx.restore();\r\n\t}\r\n});\n\nvar valueOrDefault$2 = helpers$1.valueOrDefault;\r\n\r\nvar defaultColor$1 = core_defaults.global.defaultColor;\r\n\r\ncore_defaults._set('global', {\r\n\telements: {\r\n\t\tpoint: {\r\n\t\t\tradius: 3,\r\n\t\t\tpointStyle: 'circle',\r\n\t\t\tbackgroundColor: defaultColor$1,\r\n\t\t\tborderColor: defaultColor$1,\r\n\t\t\tborderWidth: 1,\r\n\t\t\t// Hover\r\n\t\t\thitRadius: 1,\r\n\t\t\thoverRadius: 4,\r\n\t\t\thoverBorderWidth: 1\r\n\t\t}\r\n\t}\r\n});\r\n\r\nfunction xRange(mouseX) {\r\n\tvar vm = this._view;\r\n\treturn vm ? (Math.abs(mouseX - vm.x) < vm.radius + vm.hitRadius) : false;\r\n}\r\n\r\nfunction yRange(mouseY) {\r\n\tvar vm = this._view;\r\n\treturn vm ? (Math.abs(mouseY - vm.y) < vm.radius + vm.hitRadius) : false;\r\n}\r\n\r\nvar element_point = core_element.extend({\r\n\t_type: 'point',\r\n\r\n\tinRange: function(mouseX, mouseY) {\r\n\t\tvar vm = this._view;\r\n\t\treturn vm ? ((Math.pow(mouseX - vm.x, 2) + Math.pow(mouseY - vm.y, 2)) < Math.pow(vm.hitRadius + vm.radius, 2)) : false;\r\n\t},\r\n\r\n\tinLabelRange: xRange,\r\n\tinXRange: xRange,\r\n\tinYRange: yRange,\r\n\r\n\tgetCenterPoint: function() {\r\n\t\tvar vm = this._view;\r\n\t\treturn {\r\n\t\t\tx: vm.x,\r\n\t\t\ty: vm.y\r\n\t\t};\r\n\t},\r\n\r\n\tgetArea: function() {\r\n\t\treturn Math.PI * Math.pow(this._view.radius, 2);\r\n\t},\r\n\r\n\ttooltipPosition: function() {\r\n\t\tvar vm = this._view;\r\n\t\treturn {\r\n\t\t\tx: vm.x,\r\n\t\t\ty: vm.y,\r\n\t\t\tpadding: vm.radius + vm.borderWidth\r\n\t\t};\r\n\t},\r\n\r\n\tdraw: function(chartArea) {\r\n\t\tvar vm = this._view;\r\n\t\tvar ctx = this._chart.ctx;\r\n\t\tvar pointStyle = vm.pointStyle;\r\n\t\tvar rotation = vm.rotation;\r\n\t\tvar radius = vm.radius;\r\n\t\tvar x = vm.x;\r\n\t\tvar y = vm.y;\r\n\t\tvar globalDefaults = core_defaults.global;\r\n\t\tvar defaultColor = globalDefaults.defaultColor; // eslint-disable-line no-shadow\r\n\r\n\t\tif (vm.skip) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\t// Clipping for Points.\r\n\t\tif (chartArea === undefined || helpers$1.canvas._isPointInArea(vm, chartArea)) {\r\n\t\t\tctx.strokeStyle = vm.borderColor || defaultColor;\r\n\t\t\tctx.lineWidth = valueOrDefault$2(vm.borderWidth, globalDefaults.elements.point.borderWidth);\r\n\t\t\tctx.fillStyle = vm.backgroundColor || defaultColor;\r\n\t\t\thelpers$1.canvas.drawPoint(ctx, pointStyle, radius, x, y, rotation);\r\n\t\t}\r\n\t}\r\n});\n\nvar defaultColor$2 = core_defaults.global.defaultColor;\r\n\r\ncore_defaults._set('global', {\r\n\telements: {\r\n\t\trectangle: {\r\n\t\t\tbackgroundColor: defaultColor$2,\r\n\t\t\tborderColor: defaultColor$2,\r\n\t\t\tborderSkipped: 'bottom',\r\n\t\t\tborderWidth: 0\r\n\t\t}\r\n\t}\r\n});\r\n\r\nfunction isVertical(vm) {\r\n\treturn vm && vm.width !== undefined;\r\n}\r\n\r\n/**\r\n * Helper function to get the bounds of the bar regardless of the orientation\r\n * @param bar {Chart.Element.Rectangle} the bar\r\n * @return {Bounds} bounds of the bar\r\n * @private\r\n */\r\nfunction getBarBounds(vm) {\r\n\tvar x1, x2, y1, y2, half;\r\n\r\n\tif (isVertical(vm)) {\r\n\t\thalf = vm.width / 2;\r\n\t\tx1 = vm.x - half;\r\n\t\tx2 = vm.x + half;\r\n\t\ty1 = Math.min(vm.y, vm.base);\r\n\t\ty2 = Math.max(vm.y, vm.base);\r\n\t} else {\r\n\t\thalf = vm.height / 2;\r\n\t\tx1 = Math.min(vm.x, vm.base);\r\n\t\tx2 = Math.max(vm.x, vm.base);\r\n\t\ty1 = vm.y - half;\r\n\t\ty2 = vm.y + half;\r\n\t}\r\n\r\n\treturn {\r\n\t\tleft: x1,\r\n\t\ttop: y1,\r\n\t\tright: x2,\r\n\t\tbottom: y2\r\n\t};\r\n}\r\n\r\nfunction swap(orig, v1, v2) {\r\n\treturn orig === v1 ? v2 : orig === v2 ? v1 : orig;\r\n}\r\n\r\nfunction parseBorderSkipped(vm) {\r\n\tvar edge = vm.borderSkipped;\r\n\tvar res = {};\r\n\r\n\tif (!edge) {\r\n\t\treturn res;\r\n\t}\r\n\r\n\tif (vm.horizontal) {\r\n\t\tif (vm.base > vm.x) {\r\n\t\t\tedge = swap(edge, 'left', 'right');\r\n\t\t}\r\n\t} else if (vm.base < vm.y) {\r\n\t\tedge = swap(edge, 'bottom', 'top');\r\n\t}\r\n\r\n\tres[edge] = true;\r\n\treturn res;\r\n}\r\n\r\nfunction parseBorderWidth(vm, maxW, maxH) {\r\n\tvar value = vm.borderWidth;\r\n\tvar skip = parseBorderSkipped(vm);\r\n\tvar t, r, b, l;\r\n\r\n\tif (helpers$1.isObject(value)) {\r\n\t\tt = +value.top || 0;\r\n\t\tr = +value.right || 0;\r\n\t\tb = +value.bottom || 0;\r\n\t\tl = +value.left || 0;\r\n\t} else {\r\n\t\tt = r = b = l = +value || 0;\r\n\t}\r\n\r\n\treturn {\r\n\t\tt: skip.top || (t < 0) ? 0 : t > maxH ? maxH : t,\r\n\t\tr: skip.right || (r < 0) ? 0 : r > maxW ? maxW : r,\r\n\t\tb: skip.bottom || (b < 0) ? 0 : b > maxH ? maxH : b,\r\n\t\tl: skip.left || (l < 0) ? 0 : l > maxW ? maxW : l\r\n\t};\r\n}\r\n\r\nfunction boundingRects(vm) {\r\n\tvar bounds = getBarBounds(vm);\r\n\tvar width = bounds.right - bounds.left;\r\n\tvar height = bounds.bottom - bounds.top;\r\n\tvar border = parseBorderWidth(vm, width / 2, height / 2);\r\n\r\n\treturn {\r\n\t\touter: {\r\n\t\t\tx: bounds.left,\r\n\t\t\ty: bounds.top,\r\n\t\t\tw: width,\r\n\t\t\th: height\r\n\t\t},\r\n\t\tinner: {\r\n\t\t\tx: bounds.left + border.l,\r\n\t\t\ty: bounds.top + border.t,\r\n\t\t\tw: width - border.l - border.r,\r\n\t\t\th: height - border.t - border.b\r\n\t\t}\r\n\t};\r\n}\r\n\r\nfunction inRange(vm, x, y) {\r\n\tvar skipX = x === null;\r\n\tvar skipY = y === null;\r\n\tvar bounds = !vm || (skipX && skipY) ? false : getBarBounds(vm);\r\n\r\n\treturn bounds\r\n\t\t&& (skipX || x >= bounds.left && x <= bounds.right)\r\n\t\t&& (skipY || y >= bounds.top && y <= bounds.bottom);\r\n}\r\n\r\nvar element_rectangle = core_element.extend({\r\n\t_type: 'rectangle',\r\n\r\n\tdraw: function() {\r\n\t\tvar ctx = this._chart.ctx;\r\n\t\tvar vm = this._view;\r\n\t\tvar rects = boundingRects(vm);\r\n\t\tvar outer = rects.outer;\r\n\t\tvar inner = rects.inner;\r\n\r\n\t\tctx.fillStyle = vm.backgroundColor;\r\n\t\tctx.fillRect(outer.x, outer.y, outer.w, outer.h);\r\n\r\n\t\tif (outer.w === inner.w && outer.h === inner.h) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tctx.save();\r\n\t\tctx.beginPath();\r\n\t\tctx.rect(outer.x, outer.y, outer.w, outer.h);\r\n\t\tctx.clip();\r\n\t\tctx.fillStyle = vm.borderColor;\r\n\t\tctx.rect(inner.x, inner.y, inner.w, inner.h);\r\n\t\tctx.fill('evenodd');\r\n\t\tctx.restore();\r\n\t},\r\n\r\n\theight: function() {\r\n\t\tvar vm = this._view;\r\n\t\treturn vm.base - vm.y;\r\n\t},\r\n\r\n\tinRange: function(mouseX, mouseY) {\r\n\t\treturn inRange(this._view, mouseX, mouseY);\r\n\t},\r\n\r\n\tinLabelRange: function(mouseX, mouseY) {\r\n\t\tvar vm = this._view;\r\n\t\treturn isVertical(vm)\r\n\t\t\t? inRange(vm, mouseX, null)\r\n\t\t\t: inRange(vm, null, mouseY);\r\n\t},\r\n\r\n\tinXRange: function(mouseX) {\r\n\t\treturn inRange(this._view, mouseX, null);\r\n\t},\r\n\r\n\tinYRange: function(mouseY) {\r\n\t\treturn inRange(this._view, null, mouseY);\r\n\t},\r\n\r\n\tgetCenterPoint: function() {\r\n\t\tvar vm = this._view;\r\n\t\tvar x, y;\r\n\t\tif (isVertical(vm)) {\r\n\t\t\tx = vm.x;\r\n\t\t\ty = (vm.y + vm.base) / 2;\r\n\t\t} else {\r\n\t\t\tx = (vm.x + vm.base) / 2;\r\n\t\t\ty = vm.y;\r\n\t\t}\r\n\r\n\t\treturn {x: x, y: y};\r\n\t},\r\n\r\n\tgetArea: function() {\r\n\t\tvar vm = this._view;\r\n\r\n\t\treturn isVertical(vm)\r\n\t\t\t? vm.width * Math.abs(vm.y - vm.base)\r\n\t\t\t: vm.height * Math.abs(vm.x - vm.base);\r\n\t},\r\n\r\n\ttooltipPosition: function() {\r\n\t\tvar vm = this._view;\r\n\t\treturn {\r\n\t\t\tx: vm.x,\r\n\t\t\ty: vm.y\r\n\t\t};\r\n\t}\r\n});\n\nvar elements = {};\r\nvar Arc = element_arc;\r\nvar Line = element_line;\r\nvar Point = element_point;\r\nvar Rectangle = element_rectangle;\nelements.Arc = Arc;\nelements.Line = Line;\nelements.Point = Point;\nelements.Rectangle = Rectangle;\n\nvar deprecated = helpers$1._deprecated;\r\nvar valueOrDefault$3 = helpers$1.valueOrDefault;\r\n\r\ncore_defaults._set('bar', {\r\n\thover: {\r\n\t\tmode: 'label'\r\n\t},\r\n\r\n\tscales: {\r\n\t\txAxes: [{\r\n\t\t\ttype: 'category',\r\n\t\t\toffset: true,\r\n\t\t\tgridLines: {\r\n\t\t\t\toffsetGridLines: true\r\n\t\t\t}\r\n\t\t}],\r\n\r\n\t\tyAxes: [{\r\n\t\t\ttype: 'linear'\r\n\t\t}]\r\n\t}\r\n});\r\n\r\ncore_defaults._set('global', {\r\n\tdatasets: {\r\n\t\tbar: {\r\n\t\t\tcategoryPercentage: 0.8,\r\n\t\t\tbarPercentage: 0.9\r\n\t\t}\r\n\t}\r\n});\r\n\r\n/**\r\n * Computes the \"optimal\" sample size to maintain bars equally sized while preventing overlap.\r\n * @private\r\n */\r\nfunction computeMinSampleSize(scale, pixels) {\r\n\tvar min = scale._length;\r\n\tvar prev, curr, i, ilen;\r\n\r\n\tfor (i = 1, ilen = pixels.length; i < ilen; ++i) {\r\n\t\tmin = Math.min(min, Math.abs(pixels[i] - pixels[i - 1]));\r\n\t}\r\n\r\n\tfor (i = 0, ilen = scale.getTicks().length; i < ilen; ++i) {\r\n\t\tcurr = scale.getPixelForTick(i);\r\n\t\tmin = i > 0 ? Math.min(min, Math.abs(curr - prev)) : min;\r\n\t\tprev = curr;\r\n\t}\r\n\r\n\treturn min;\r\n}\r\n\r\n/**\r\n * Computes an \"ideal\" category based on the absolute bar thickness or, if undefined or null,\r\n * uses the smallest interval (see computeMinSampleSize) that prevents bar overlapping. This\r\n * mode currently always generates bars equally sized (until we introduce scriptable options?).\r\n * @private\r\n */\r\nfunction computeFitCategoryTraits(index, ruler, options) {\r\n\tvar thickness = options.barThickness;\r\n\tvar count = ruler.stackCount;\r\n\tvar curr = ruler.pixels[index];\r\n\tvar min = helpers$1.isNullOrUndef(thickness)\r\n\t\t? computeMinSampleSize(ruler.scale, ruler.pixels)\r\n\t\t: -1;\r\n\tvar size, ratio;\r\n\r\n\tif (helpers$1.isNullOrUndef(thickness)) {\r\n\t\tsize = min * options.categoryPercentage;\r\n\t\tratio = options.barPercentage;\r\n\t} else {\r\n\t\t// When bar thickness is enforced, category and bar percentages are ignored.\r\n\t\t// Note(SB): we could add support for relative bar thickness (e.g. barThickness: '50%')\r\n\t\t// and deprecate barPercentage since this value is ignored when thickness is absolute.\r\n\t\tsize = thickness * count;\r\n\t\tratio = 1;\r\n\t}\r\n\r\n\treturn {\r\n\t\tchunk: size / count,\r\n\t\tratio: ratio,\r\n\t\tstart: curr - (size / 2)\r\n\t};\r\n}\r\n\r\n/**\r\n * Computes an \"optimal\" category that globally arranges bars side by side (no gap when\r\n * percentage options are 1), based on the previous and following categories. This mode\r\n * generates bars with different widths when data are not evenly spaced.\r\n * @private\r\n */\r\nfunction computeFlexCategoryTraits(index, ruler, options) {\r\n\tvar pixels = ruler.pixels;\r\n\tvar curr = pixels[index];\r\n\tvar prev = index > 0 ? pixels[index - 1] : null;\r\n\tvar next = index < pixels.length - 1 ? pixels[index + 1] : null;\r\n\tvar percent = options.categoryPercentage;\r\n\tvar start, size;\r\n\r\n\tif (prev === null) {\r\n\t\t// first data: its size is double based on the next point or,\r\n\t\t// if it's also the last data, we use the scale size.\r\n\t\tprev = curr - (next === null ? ruler.end - ruler.start : next - curr);\r\n\t}\r\n\r\n\tif (next === null) {\r\n\t\t// last data: its size is also double based on the previous point.\r\n\t\tnext = curr + curr - prev;\r\n\t}\r\n\r\n\tstart = curr - (curr - Math.min(prev, next)) / 2 * percent;\r\n\tsize = Math.abs(next - prev) / 2 * percent;\r\n\r\n\treturn {\r\n\t\tchunk: size / ruler.stackCount,\r\n\t\tratio: options.barPercentage,\r\n\t\tstart: start\r\n\t};\r\n}\r\n\r\nvar controller_bar = core_datasetController.extend({\r\n\r\n\tdataElementType: elements.Rectangle,\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_dataElementOptions: [\r\n\t\t'backgroundColor',\r\n\t\t'borderColor',\r\n\t\t'borderSkipped',\r\n\t\t'borderWidth',\r\n\t\t'barPercentage',\r\n\t\t'barThickness',\r\n\t\t'categoryPercentage',\r\n\t\t'maxBarThickness',\r\n\t\t'minBarLength'\r\n\t],\r\n\r\n\tinitialize: function() {\r\n\t\tvar me = this;\r\n\t\tvar meta, scaleOpts;\r\n\r\n\t\tcore_datasetController.prototype.initialize.apply(me, arguments);\r\n\r\n\t\tmeta = me.getMeta();\r\n\t\tmeta.stack = me.getDataset().stack;\r\n\t\tmeta.bar = true;\r\n\r\n\t\tscaleOpts = me._getIndexScale().options;\r\n\t\tdeprecated('bar chart', scaleOpts.barPercentage, 'scales.[x/y]Axes.barPercentage', 'dataset.barPercentage');\r\n\t\tdeprecated('bar chart', scaleOpts.barThickness, 'scales.[x/y]Axes.barThickness', 'dataset.barThickness');\r\n\t\tdeprecated('bar chart', scaleOpts.categoryPercentage, 'scales.[x/y]Axes.categoryPercentage', 'dataset.categoryPercentage');\r\n\t\tdeprecated('bar chart', me._getValueScale().options.minBarLength, 'scales.[x/y]Axes.minBarLength', 'dataset.minBarLength');\r\n\t\tdeprecated('bar chart', scaleOpts.maxBarThickness, 'scales.[x/y]Axes.maxBarThickness', 'dataset.maxBarThickness');\r\n\t},\r\n\r\n\tupdate: function(reset) {\r\n\t\tvar me = this;\r\n\t\tvar rects = me.getMeta().data;\r\n\t\tvar i, ilen;\r\n\r\n\t\tme._ruler = me.getRuler();\r\n\r\n\t\tfor (i = 0, ilen = rects.length; i < ilen; ++i) {\r\n\t\t\tme.updateElement(rects[i], i, reset);\r\n\t\t}\r\n\t},\r\n\r\n\tupdateElement: function(rectangle, index, reset) {\r\n\t\tvar me = this;\r\n\t\tvar meta = me.getMeta();\r\n\t\tvar dataset = me.getDataset();\r\n\t\tvar options = me._resolveDataElementOptions(rectangle, index);\r\n\r\n\t\trectangle._xScale = me.getScaleForId(meta.xAxisID);\r\n\t\trectangle._yScale = me.getScaleForId(meta.yAxisID);\r\n\t\trectangle._datasetIndex = me.index;\r\n\t\trectangle._index = index;\r\n\t\trectangle._model = {\r\n\t\t\tbackgroundColor: options.backgroundColor,\r\n\t\t\tborderColor: options.borderColor,\r\n\t\t\tborderSkipped: options.borderSkipped,\r\n\t\t\tborderWidth: options.borderWidth,\r\n\t\t\tdatasetLabel: dataset.label,\r\n\t\t\tlabel: me.chart.data.labels[index]\r\n\t\t};\r\n\r\n\t\tif (helpers$1.isArray(dataset.data[index])) {\r\n\t\t\trectangle._model.borderSkipped = null;\r\n\t\t}\r\n\r\n\t\tme._updateElementGeometry(rectangle, index, reset, options);\r\n\r\n\t\trectangle.pivot();\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_updateElementGeometry: function(rectangle, index, reset, options) {\r\n\t\tvar me = this;\r\n\t\tvar model = rectangle._model;\r\n\t\tvar vscale = me._getValueScale();\r\n\t\tvar base = vscale.getBasePixel();\r\n\t\tvar horizontal = vscale.isHorizontal();\r\n\t\tvar ruler = me._ruler || me.getRuler();\r\n\t\tvar vpixels = me.calculateBarValuePixels(me.index, index, options);\r\n\t\tvar ipixels = me.calculateBarIndexPixels(me.index, index, ruler, options);\r\n\r\n\t\tmodel.horizontal = horizontal;\r\n\t\tmodel.base = reset ? base : vpixels.base;\r\n\t\tmodel.x = horizontal ? reset ? base : vpixels.head : ipixels.center;\r\n\t\tmodel.y = horizontal ? ipixels.center : reset ? base : vpixels.head;\r\n\t\tmodel.height = horizontal ? ipixels.size : undefined;\r\n\t\tmodel.width = horizontal ? undefined : ipixels.size;\r\n\t},\r\n\r\n\t/**\r\n\t * Returns the stacks based on groups and bar visibility.\r\n\t * @param {number} [last] - The dataset index\r\n\t * @returns {string[]} The list of stack IDs\r\n\t * @private\r\n\t */\r\n\t_getStacks: function(last) {\r\n\t\tvar me = this;\r\n\t\tvar scale = me._getIndexScale();\r\n\t\tvar metasets = scale._getMatchingVisibleMetas(me._type);\r\n\t\tvar stacked = scale.options.stacked;\r\n\t\tvar ilen = metasets.length;\r\n\t\tvar stacks = [];\r\n\t\tvar i, meta;\r\n\r\n\t\tfor (i = 0; i < ilen; ++i) {\r\n\t\t\tmeta = metasets[i];\r\n\t\t\t// stacked   | meta.stack\r\n\t\t\t//           | found | not found | undefined\r\n\t\t\t// false     |   x   |     x     |     x\r\n\t\t\t// true      |       |     x     |\r\n\t\t\t// undefined |       |     x     |     x\r\n\t\t\tif (stacked === false || stacks.indexOf(meta.stack) === -1 ||\r\n\t\t\t\t(stacked === undefined && meta.stack === undefined)) {\r\n\t\t\t\tstacks.push(meta.stack);\r\n\t\t\t}\r\n\t\t\tif (meta.index === last) {\r\n\t\t\t\tbreak;\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\treturn stacks;\r\n\t},\r\n\r\n\t/**\r\n\t * Returns the effective number of stacks based on groups and bar visibility.\r\n\t * @private\r\n\t */\r\n\tgetStackCount: function() {\r\n\t\treturn this._getStacks().length;\r\n\t},\r\n\r\n\t/**\r\n\t * Returns the stack index for the given dataset based on groups and bar visibility.\r\n\t * @param {number} [datasetIndex] - The dataset index\r\n\t * @param {string} [name] - The stack name to find\r\n\t * @returns {number} The stack index\r\n\t * @private\r\n\t */\r\n\tgetStackIndex: function(datasetIndex, name) {\r\n\t\tvar stacks = this._getStacks(datasetIndex);\r\n\t\tvar index = (name !== undefined)\r\n\t\t\t? stacks.indexOf(name)\r\n\t\t\t: -1; // indexOf returns -1 if element is not present\r\n\r\n\t\treturn (index === -1)\r\n\t\t\t? stacks.length - 1\r\n\t\t\t: index;\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\tgetRuler: function() {\r\n\t\tvar me = this;\r\n\t\tvar scale = me._getIndexScale();\r\n\t\tvar pixels = [];\r\n\t\tvar i, ilen;\r\n\r\n\t\tfor (i = 0, ilen = me.getMeta().data.length; i < ilen; ++i) {\r\n\t\t\tpixels.push(scale.getPixelForValue(null, i, me.index));\r\n\t\t}\r\n\r\n\t\treturn {\r\n\t\t\tpixels: pixels,\r\n\t\t\tstart: scale._startPixel,\r\n\t\t\tend: scale._endPixel,\r\n\t\t\tstackCount: me.getStackCount(),\r\n\t\t\tscale: scale\r\n\t\t};\r\n\t},\r\n\r\n\t/**\r\n\t * Note: pixel values are not clamped to the scale area.\r\n\t * @private\r\n\t */\r\n\tcalculateBarValuePixels: function(datasetIndex, index, options) {\r\n\t\tvar me = this;\r\n\t\tvar chart = me.chart;\r\n\t\tvar scale = me._getValueScale();\r\n\t\tvar isHorizontal = scale.isHorizontal();\r\n\t\tvar datasets = chart.data.datasets;\r\n\t\tvar metasets = scale._getMatchingVisibleMetas(me._type);\r\n\t\tvar value = scale._parseValue(datasets[datasetIndex].data[index]);\r\n\t\tvar minBarLength = options.minBarLength;\r\n\t\tvar stacked = scale.options.stacked;\r\n\t\tvar stack = me.getMeta().stack;\r\n\t\tvar start = value.start === undefined ? 0 : value.max >= 0 && value.min >= 0 ? value.min : value.max;\r\n\t\tvar length = value.start === undefined ? value.end : value.max >= 0 && value.min >= 0 ? value.max - value.min : value.min - value.max;\r\n\t\tvar ilen = metasets.length;\r\n\t\tvar i, imeta, ivalue, base, head, size, stackLength;\r\n\r\n\t\tif (stacked || (stacked === undefined && stack !== undefined)) {\r\n\t\t\tfor (i = 0; i < ilen; ++i) {\r\n\t\t\t\timeta = metasets[i];\r\n\r\n\t\t\t\tif (imeta.index === datasetIndex) {\r\n\t\t\t\t\tbreak;\r\n\t\t\t\t}\r\n\r\n\t\t\t\tif (imeta.stack === stack) {\r\n\t\t\t\t\tstackLength = scale._parseValue(datasets[imeta.index].data[index]);\r\n\t\t\t\t\tivalue = stackLength.start === undefined ? stackLength.end : stackLength.min >= 0 && stackLength.max >= 0 ? stackLength.max : stackLength.min;\r\n\r\n\t\t\t\t\tif ((value.min < 0 && ivalue < 0) || (value.max >= 0 && ivalue > 0)) {\r\n\t\t\t\t\t\tstart += ivalue;\r\n\t\t\t\t\t}\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\tbase = scale.getPixelForValue(start);\r\n\t\thead = scale.getPixelForValue(start + length);\r\n\t\tsize = head - base;\r\n\r\n\t\tif (minBarLength !== undefined && Math.abs(size) < minBarLength) {\r\n\t\t\tsize = minBarLength;\r\n\t\t\tif (length >= 0 && !isHorizontal || length < 0 && isHorizontal) {\r\n\t\t\t\thead = base - minBarLength;\r\n\t\t\t} else {\r\n\t\t\t\thead = base + minBarLength;\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\treturn {\r\n\t\t\tsize: size,\r\n\t\t\tbase: base,\r\n\t\t\thead: head,\r\n\t\t\tcenter: head + size / 2\r\n\t\t};\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\tcalculateBarIndexPixels: function(datasetIndex, index, ruler, options) {\r\n\t\tvar me = this;\r\n\t\tvar range = options.barThickness === 'flex'\r\n\t\t\t? computeFlexCategoryTraits(index, ruler, options)\r\n\t\t\t: computeFitCategoryTraits(index, ruler, options);\r\n\r\n\t\tvar stackIndex = me.getStackIndex(datasetIndex, me.getMeta().stack);\r\n\t\tvar center = range.start + (range.chunk * stackIndex) + (range.chunk / 2);\r\n\t\tvar size = Math.min(\r\n\t\t\tvalueOrDefault$3(options.maxBarThickness, Infinity),\r\n\t\t\trange.chunk * range.ratio);\r\n\r\n\t\treturn {\r\n\t\t\tbase: center - size / 2,\r\n\t\t\thead: center + size / 2,\r\n\t\t\tcenter: center,\r\n\t\t\tsize: size\r\n\t\t};\r\n\t},\r\n\r\n\tdraw: function() {\r\n\t\tvar me = this;\r\n\t\tvar chart = me.chart;\r\n\t\tvar scale = me._getValueScale();\r\n\t\tvar rects = me.getMeta().data;\r\n\t\tvar dataset = me.getDataset();\r\n\t\tvar ilen = rects.length;\r\n\t\tvar i = 0;\r\n\r\n\t\thelpers$1.canvas.clipArea(chart.ctx, chart.chartArea);\r\n\r\n\t\tfor (; i < ilen; ++i) {\r\n\t\t\tvar val = scale._parseValue(dataset.data[i]);\r\n\t\t\tif (!isNaN(val.min) && !isNaN(val.max)) {\r\n\t\t\t\trects[i].draw();\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\thelpers$1.canvas.unclipArea(chart.ctx);\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_resolveDataElementOptions: function() {\r\n\t\tvar me = this;\r\n\t\tvar values = helpers$1.extend({}, core_datasetController.prototype._resolveDataElementOptions.apply(me, arguments));\r\n\t\tvar indexOpts = me._getIndexScale().options;\r\n\t\tvar valueOpts = me._getValueScale().options;\r\n\r\n\t\tvalues.barPercentage = valueOrDefault$3(indexOpts.barPercentage, values.barPercentage);\r\n\t\tvalues.barThickness = valueOrDefault$3(indexOpts.barThickness, values.barThickness);\r\n\t\tvalues.categoryPercentage = valueOrDefault$3(indexOpts.categoryPercentage, values.categoryPercentage);\r\n\t\tvalues.maxBarThickness = valueOrDefault$3(indexOpts.maxBarThickness, values.maxBarThickness);\r\n\t\tvalues.minBarLength = valueOrDefault$3(valueOpts.minBarLength, values.minBarLength);\r\n\r\n\t\treturn values;\r\n\t}\r\n\r\n});\n\nvar valueOrDefault$4 = helpers$1.valueOrDefault;\r\nvar resolve$1 = helpers$1.options.resolve;\r\n\r\ncore_defaults._set('bubble', {\r\n\thover: {\r\n\t\tmode: 'single'\r\n\t},\r\n\r\n\tscales: {\r\n\t\txAxes: [{\r\n\t\t\ttype: 'linear', // bubble should probably use a linear scale by default\r\n\t\t\tposition: 'bottom',\r\n\t\t\tid: 'x-axis-0' // need an ID so datasets can reference the scale\r\n\t\t}],\r\n\t\tyAxes: [{\r\n\t\t\ttype: 'linear',\r\n\t\t\tposition: 'left',\r\n\t\t\tid: 'y-axis-0'\r\n\t\t}]\r\n\t},\r\n\r\n\ttooltips: {\r\n\t\tcallbacks: {\r\n\t\t\ttitle: function() {\r\n\t\t\t\t// Title doesn't make sense for scatter since we format the data as a point\r\n\t\t\t\treturn '';\r\n\t\t\t},\r\n\t\t\tlabel: function(item, data) {\r\n\t\t\t\tvar datasetLabel = data.datasets[item.datasetIndex].label || '';\r\n\t\t\t\tvar dataPoint = data.datasets[item.datasetIndex].data[item.index];\r\n\t\t\t\treturn datasetLabel + ': (' + item.xLabel + ', ' + item.yLabel + ', ' + dataPoint.r + ')';\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n});\r\n\r\nvar controller_bubble = core_datasetController.extend({\r\n\t/**\r\n\t * @protected\r\n\t */\r\n\tdataElementType: elements.Point,\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_dataElementOptions: [\r\n\t\t'backgroundColor',\r\n\t\t'borderColor',\r\n\t\t'borderWidth',\r\n\t\t'hoverBackgroundColor',\r\n\t\t'hoverBorderColor',\r\n\t\t'hoverBorderWidth',\r\n\t\t'hoverRadius',\r\n\t\t'hitRadius',\r\n\t\t'pointStyle',\r\n\t\t'rotation'\r\n\t],\r\n\r\n\t/**\r\n\t * @protected\r\n\t */\r\n\tupdate: function(reset) {\r\n\t\tvar me = this;\r\n\t\tvar meta = me.getMeta();\r\n\t\tvar points = meta.data;\r\n\r\n\t\t// Update Points\r\n\t\thelpers$1.each(points, function(point, index) {\r\n\t\t\tme.updateElement(point, index, reset);\r\n\t\t});\r\n\t},\r\n\r\n\t/**\r\n\t * @protected\r\n\t */\r\n\tupdateElement: function(point, index, reset) {\r\n\t\tvar me = this;\r\n\t\tvar meta = me.getMeta();\r\n\t\tvar custom = point.custom || {};\r\n\t\tvar xScale = me.getScaleForId(meta.xAxisID);\r\n\t\tvar yScale = me.getScaleForId(meta.yAxisID);\r\n\t\tvar options = me._resolveDataElementOptions(point, index);\r\n\t\tvar data = me.getDataset().data[index];\r\n\t\tvar dsIndex = me.index;\r\n\r\n\t\tvar x = reset ? xScale.getPixelForDecimal(0.5) : xScale.getPixelForValue(typeof data === 'object' ? data : NaN, index, dsIndex);\r\n\t\tvar y = reset ? yScale.getBasePixel() : yScale.getPixelForValue(data, index, dsIndex);\r\n\r\n\t\tpoint._xScale = xScale;\r\n\t\tpoint._yScale = yScale;\r\n\t\tpoint._options = options;\r\n\t\tpoint._datasetIndex = dsIndex;\r\n\t\tpoint._index = index;\r\n\t\tpoint._model = {\r\n\t\t\tbackgroundColor: options.backgroundColor,\r\n\t\t\tborderColor: options.borderColor,\r\n\t\t\tborderWidth: options.borderWidth,\r\n\t\t\thitRadius: options.hitRadius,\r\n\t\t\tpointStyle: options.pointStyle,\r\n\t\t\trotation: options.rotation,\r\n\t\t\tradius: reset ? 0 : options.radius,\r\n\t\t\tskip: custom.skip || isNaN(x) || isNaN(y),\r\n\t\t\tx: x,\r\n\t\t\ty: y,\r\n\t\t};\r\n\r\n\t\tpoint.pivot();\r\n\t},\r\n\r\n\t/**\r\n\t * @protected\r\n\t */\r\n\tsetHoverStyle: function(point) {\r\n\t\tvar model = point._model;\r\n\t\tvar options = point._options;\r\n\t\tvar getHoverColor = helpers$1.getHoverColor;\r\n\r\n\t\tpoint.$previousStyle = {\r\n\t\t\tbackgroundColor: model.backgroundColor,\r\n\t\t\tborderColor: model.borderColor,\r\n\t\t\tborderWidth: model.borderWidth,\r\n\t\t\tradius: model.radius\r\n\t\t};\r\n\r\n\t\tmodel.backgroundColor = valueOrDefault$4(options.hoverBackgroundColor, getHoverColor(options.backgroundColor));\r\n\t\tmodel.borderColor = valueOrDefault$4(options.hoverBorderColor, getHoverColor(options.borderColor));\r\n\t\tmodel.borderWidth = valueOrDefault$4(options.hoverBorderWidth, options.borderWidth);\r\n\t\tmodel.radius = options.radius + options.hoverRadius;\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_resolveDataElementOptions: function(point, index) {\r\n\t\tvar me = this;\r\n\t\tvar chart = me.chart;\r\n\t\tvar dataset = me.getDataset();\r\n\t\tvar custom = point.custom || {};\r\n\t\tvar data = dataset.data[index] || {};\r\n\t\tvar values = core_datasetController.prototype._resolveDataElementOptions.apply(me, arguments);\r\n\r\n\t\t// Scriptable options\r\n\t\tvar context = {\r\n\t\t\tchart: chart,\r\n\t\t\tdataIndex: index,\r\n\t\t\tdataset: dataset,\r\n\t\t\tdatasetIndex: me.index\r\n\t\t};\r\n\r\n\t\t// In case values were cached (and thus frozen), we need to clone the values\r\n\t\tif (me._cachedDataOpts === values) {\r\n\t\t\tvalues = helpers$1.extend({}, values);\r\n\t\t}\r\n\r\n\t\t// Custom radius resolution\r\n\t\tvalues.radius = resolve$1([\r\n\t\t\tcustom.radius,\r\n\t\t\tdata.r,\r\n\t\t\tme._config.radius,\r\n\t\t\tchart.options.elements.point.radius\r\n\t\t], context, index);\r\n\r\n\t\treturn values;\r\n\t}\r\n});\n\nvar valueOrDefault$5 = helpers$1.valueOrDefault;\r\n\r\nvar PI$1 = Math.PI;\r\nvar DOUBLE_PI$1 = PI$1 * 2;\r\nvar HALF_PI$1 = PI$1 / 2;\r\n\r\ncore_defaults._set('doughnut', {\r\n\tanimation: {\r\n\t\t// Boolean - Whether we animate the rotation of the Doughnut\r\n\t\tanimateRotate: true,\r\n\t\t// Boolean - Whether we animate scaling the Doughnut from the centre\r\n\t\tanimateScale: false\r\n\t},\r\n\thover: {\r\n\t\tmode: 'single'\r\n\t},\r\n\tlegendCallback: function(chart) {\r\n\t\tvar list = document.createElement('ul');\r\n\t\tvar data = chart.data;\r\n\t\tvar datasets = data.datasets;\r\n\t\tvar labels = data.labels;\r\n\t\tvar i, ilen, listItem, listItemSpan;\r\n\r\n\t\tlist.setAttribute('class', chart.id + '-legend');\r\n\t\tif (datasets.length) {\r\n\t\t\tfor (i = 0, ilen = datasets[0].data.length; i < ilen; ++i) {\r\n\t\t\t\tlistItem = list.appendChild(document.createElement('li'));\r\n\t\t\t\tlistItemSpan = listItem.appendChild(document.createElement('span'));\r\n\t\t\t\tlistItemSpan.style.backgroundColor = datasets[0].backgroundColor[i];\r\n\t\t\t\tif (labels[i]) {\r\n\t\t\t\t\tlistItem.appendChild(document.createTextNode(labels[i]));\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\treturn list.outerHTML;\r\n\t},\r\n\tlegend: {\r\n\t\tlabels: {\r\n\t\t\tgenerateLabels: function(chart) {\r\n\t\t\t\tvar data = chart.data;\r\n\t\t\t\tif (data.labels.length && data.datasets.length) {\r\n\t\t\t\t\treturn data.labels.map(function(label, i) {\r\n\t\t\t\t\t\tvar meta = chart.getDatasetMeta(0);\r\n\t\t\t\t\t\tvar style = meta.controller.getStyle(i);\r\n\r\n\t\t\t\t\t\treturn {\r\n\t\t\t\t\t\t\ttext: label,\r\n\t\t\t\t\t\t\tfillStyle: style.backgroundColor,\r\n\t\t\t\t\t\t\tstrokeStyle: style.borderColor,\r\n\t\t\t\t\t\t\tlineWidth: style.borderWidth,\r\n\t\t\t\t\t\t\thidden: isNaN(data.datasets[0].data[i]) || meta.data[i].hidden,\r\n\r\n\t\t\t\t\t\t\t// Extra data used for toggling the correct item\r\n\t\t\t\t\t\t\tindex: i\r\n\t\t\t\t\t\t};\r\n\t\t\t\t\t});\r\n\t\t\t\t}\r\n\t\t\t\treturn [];\r\n\t\t\t}\r\n\t\t},\r\n\r\n\t\tonClick: function(e, legendItem) {\r\n\t\t\tvar index = legendItem.index;\r\n\t\t\tvar chart = this.chart;\r\n\t\t\tvar i, ilen, meta;\r\n\r\n\t\t\tfor (i = 0, ilen = (chart.data.datasets || []).length; i < ilen; ++i) {\r\n\t\t\t\tmeta = chart.getDatasetMeta(i);\r\n\t\t\t\t// toggle visibility of index if exists\r\n\t\t\t\tif (meta.data[index]) {\r\n\t\t\t\t\tmeta.data[index].hidden = !meta.data[index].hidden;\r\n\t\t\t\t}\r\n\t\t\t}\r\n\r\n\t\t\tchart.update();\r\n\t\t}\r\n\t},\r\n\r\n\t// The percentage of the chart that we cut out of the middle.\r\n\tcutoutPercentage: 50,\r\n\r\n\t// The rotation of the chart, where the first data arc begins.\r\n\trotation: -HALF_PI$1,\r\n\r\n\t// The total circumference of the chart.\r\n\tcircumference: DOUBLE_PI$1,\r\n\r\n\t// Need to override these to give a nice default\r\n\ttooltips: {\r\n\t\tcallbacks: {\r\n\t\t\ttitle: function() {\r\n\t\t\t\treturn '';\r\n\t\t\t},\r\n\t\t\tlabel: function(tooltipItem, data) {\r\n\t\t\t\tvar dataLabel = data.labels[tooltipItem.index];\r\n\t\t\t\tvar value = ': ' + data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index];\r\n\r\n\t\t\t\tif (helpers$1.isArray(dataLabel)) {\r\n\t\t\t\t\t// show value on first line of multiline label\r\n\t\t\t\t\t// need to clone because we are changing the value\r\n\t\t\t\t\tdataLabel = dataLabel.slice();\r\n\t\t\t\t\tdataLabel[0] += value;\r\n\t\t\t\t} else {\r\n\t\t\t\t\tdataLabel += value;\r\n\t\t\t\t}\r\n\r\n\t\t\t\treturn dataLabel;\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n});\r\n\r\nvar controller_doughnut = core_datasetController.extend({\r\n\r\n\tdataElementType: elements.Arc,\r\n\r\n\tlinkScales: helpers$1.noop,\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_dataElementOptions: [\r\n\t\t'backgroundColor',\r\n\t\t'borderColor',\r\n\t\t'borderWidth',\r\n\t\t'borderAlign',\r\n\t\t'hoverBackgroundColor',\r\n\t\t'hoverBorderColor',\r\n\t\t'hoverBorderWidth',\r\n\t],\r\n\r\n\t// Get index of the dataset in relation to the visible datasets. This allows determining the inner and outer radius correctly\r\n\tgetRingIndex: function(datasetIndex) {\r\n\t\tvar ringIndex = 0;\r\n\r\n\t\tfor (var j = 0; j < datasetIndex; ++j) {\r\n\t\t\tif (this.chart.isDatasetVisible(j)) {\r\n\t\t\t\t++ringIndex;\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\treturn ringIndex;\r\n\t},\r\n\r\n\tupdate: function(reset) {\r\n\t\tvar me = this;\r\n\t\tvar chart = me.chart;\r\n\t\tvar chartArea = chart.chartArea;\r\n\t\tvar opts = chart.options;\r\n\t\tvar ratioX = 1;\r\n\t\tvar ratioY = 1;\r\n\t\tvar offsetX = 0;\r\n\t\tvar offsetY = 0;\r\n\t\tvar meta = me.getMeta();\r\n\t\tvar arcs = meta.data;\r\n\t\tvar cutout = opts.cutoutPercentage / 100 || 0;\r\n\t\tvar circumference = opts.circumference;\r\n\t\tvar chartWeight = me._getRingWeight(me.index);\r\n\t\tvar maxWidth, maxHeight, i, ilen;\r\n\r\n\t\t// If the chart's circumference isn't a full circle, calculate size as a ratio of the width/height of the arc\r\n\t\tif (circumference < DOUBLE_PI$1) {\r\n\t\t\tvar startAngle = opts.rotation % DOUBLE_PI$1;\r\n\t\t\tstartAngle += startAngle >= PI$1 ? -DOUBLE_PI$1 : startAngle < -PI$1 ? DOUBLE_PI$1 : 0;\r\n\t\t\tvar endAngle = startAngle + circumference;\r\n\t\t\tvar startX = Math.cos(startAngle);\r\n\t\t\tvar startY = Math.sin(startAngle);\r\n\t\t\tvar endX = Math.cos(endAngle);\r\n\t\t\tvar endY = Math.sin(endAngle);\r\n\t\t\tvar contains0 = (startAngle <= 0 && endAngle >= 0) || endAngle >= DOUBLE_PI$1;\r\n\t\t\tvar contains90 = (startAngle <= HALF_PI$1 && endAngle >= HALF_PI$1) || endAngle >= DOUBLE_PI$1 + HALF_PI$1;\r\n\t\t\tvar contains180 = startAngle === -PI$1 || endAngle >= PI$1;\r\n\t\t\tvar contains270 = (startAngle <= -HALF_PI$1 && endAngle >= -HALF_PI$1) || endAngle >= PI$1 + HALF_PI$1;\r\n\t\t\tvar minX = contains180 ? -1 : Math.min(startX, startX * cutout, endX, endX * cutout);\r\n\t\t\tvar minY = contains270 ? -1 : Math.min(startY, startY * cutout, endY, endY * cutout);\r\n\t\t\tvar maxX = contains0 ? 1 : Math.max(startX, startX * cutout, endX, endX * cutout);\r\n\t\t\tvar maxY = contains90 ? 1 : Math.max(startY, startY * cutout, endY, endY * cutout);\r\n\t\t\tratioX = (maxX - minX) / 2;\r\n\t\t\tratioY = (maxY - minY) / 2;\r\n\t\t\toffsetX = -(maxX + minX) / 2;\r\n\t\t\toffsetY = -(maxY + minY) / 2;\r\n\t\t}\r\n\r\n\t\tfor (i = 0, ilen = arcs.length; i < ilen; ++i) {\r\n\t\t\tarcs[i]._options = me._resolveDataElementOptions(arcs[i], i);\r\n\t\t}\r\n\r\n\t\tchart.borderWidth = me.getMaxBorderWidth();\r\n\t\tmaxWidth = (chartArea.right - chartArea.left - chart.borderWidth) / ratioX;\r\n\t\tmaxHeight = (chartArea.bottom - chartArea.top - chart.borderWidth) / ratioY;\r\n\t\tchart.outerRadius = Math.max(Math.min(maxWidth, maxHeight) / 2, 0);\r\n\t\tchart.innerRadius = Math.max(chart.outerRadius * cutout, 0);\r\n\t\tchart.radiusLength = (chart.outerRadius - chart.innerRadius) / (me._getVisibleDatasetWeightTotal() || 1);\r\n\t\tchart.offsetX = offsetX * chart.outerRadius;\r\n\t\tchart.offsetY = offsetY * chart.outerRadius;\r\n\r\n\t\tmeta.total = me.calculateTotal();\r\n\r\n\t\tme.outerRadius = chart.outerRadius - chart.radiusLength * me._getRingWeightOffset(me.index);\r\n\t\tme.innerRadius = Math.max(me.outerRadius - chart.radiusLength * chartWeight, 0);\r\n\r\n\t\tfor (i = 0, ilen = arcs.length; i < ilen; ++i) {\r\n\t\t\tme.updateElement(arcs[i], i, reset);\r\n\t\t}\r\n\t},\r\n\r\n\tupdateElement: function(arc, index, reset) {\r\n\t\tvar me = this;\r\n\t\tvar chart = me.chart;\r\n\t\tvar chartArea = chart.chartArea;\r\n\t\tvar opts = chart.options;\r\n\t\tvar animationOpts = opts.animation;\r\n\t\tvar centerX = (chartArea.left + chartArea.right) / 2;\r\n\t\tvar centerY = (chartArea.top + chartArea.bottom) / 2;\r\n\t\tvar startAngle = opts.rotation; // non reset case handled later\r\n\t\tvar endAngle = opts.rotation; // non reset case handled later\r\n\t\tvar dataset = me.getDataset();\r\n\t\tvar circumference = reset && animationOpts.animateRotate ? 0 : arc.hidden ? 0 : me.calculateCircumference(dataset.data[index]) * (opts.circumference / DOUBLE_PI$1);\r\n\t\tvar innerRadius = reset && animationOpts.animateScale ? 0 : me.innerRadius;\r\n\t\tvar outerRadius = reset && animationOpts.animateScale ? 0 : me.outerRadius;\r\n\t\tvar options = arc._options || {};\r\n\r\n\t\thelpers$1.extend(arc, {\r\n\t\t\t// Utility\r\n\t\t\t_datasetIndex: me.index,\r\n\t\t\t_index: index,\r\n\r\n\t\t\t// Desired view properties\r\n\t\t\t_model: {\r\n\t\t\t\tbackgroundColor: options.backgroundColor,\r\n\t\t\t\tborderColor: options.borderColor,\r\n\t\t\t\tborderWidth: options.borderWidth,\r\n\t\t\t\tborderAlign: options.borderAlign,\r\n\t\t\t\tx: centerX + chart.offsetX,\r\n\t\t\t\ty: centerY + chart.offsetY,\r\n\t\t\t\tstartAngle: startAngle,\r\n\t\t\t\tendAngle: endAngle,\r\n\t\t\t\tcircumference: circumference,\r\n\t\t\t\touterRadius: outerRadius,\r\n\t\t\t\tinnerRadius: innerRadius,\r\n\t\t\t\tlabel: helpers$1.valueAtIndexOrDefault(dataset.label, index, chart.data.labels[index])\r\n\t\t\t}\r\n\t\t});\r\n\r\n\t\tvar model = arc._model;\r\n\r\n\t\t// Set correct angles if not resetting\r\n\t\tif (!reset || !animationOpts.animateRotate) {\r\n\t\t\tif (index === 0) {\r\n\t\t\t\tmodel.startAngle = opts.rotation;\r\n\t\t\t} else {\r\n\t\t\t\tmodel.startAngle = me.getMeta().data[index - 1]._model.endAngle;\r\n\t\t\t}\r\n\r\n\t\t\tmodel.endAngle = model.startAngle + model.circumference;\r\n\t\t}\r\n\r\n\t\tarc.pivot();\r\n\t},\r\n\r\n\tcalculateTotal: function() {\r\n\t\tvar dataset = this.getDataset();\r\n\t\tvar meta = this.getMeta();\r\n\t\tvar total = 0;\r\n\t\tvar value;\r\n\r\n\t\thelpers$1.each(meta.data, function(element, index) {\r\n\t\t\tvalue = dataset.data[index];\r\n\t\t\tif (!isNaN(value) && !element.hidden) {\r\n\t\t\t\ttotal += Math.abs(value);\r\n\t\t\t}\r\n\t\t});\r\n\r\n\t\t/* if (total === 0) {\r\n\t\t\ttotal = NaN;\r\n\t\t}*/\r\n\r\n\t\treturn total;\r\n\t},\r\n\r\n\tcalculateCircumference: function(value) {\r\n\t\tvar total = this.getMeta().total;\r\n\t\tif (total > 0 && !isNaN(value)) {\r\n\t\t\treturn DOUBLE_PI$1 * (Math.abs(value) / total);\r\n\t\t}\r\n\t\treturn 0;\r\n\t},\r\n\r\n\t// gets the max border or hover width to properly scale pie charts\r\n\tgetMaxBorderWidth: function(arcs) {\r\n\t\tvar me = this;\r\n\t\tvar max = 0;\r\n\t\tvar chart = me.chart;\r\n\t\tvar i, ilen, meta, arc, controller, options, borderWidth, hoverWidth;\r\n\r\n\t\tif (!arcs) {\r\n\t\t\t// Find the outmost visible dataset\r\n\t\t\tfor (i = 0, ilen = chart.data.datasets.length; i < ilen; ++i) {\r\n\t\t\t\tif (chart.isDatasetVisible(i)) {\r\n\t\t\t\t\tmeta = chart.getDatasetMeta(i);\r\n\t\t\t\t\tarcs = meta.data;\r\n\t\t\t\t\tif (i !== me.index) {\r\n\t\t\t\t\t\tcontroller = meta.controller;\r\n\t\t\t\t\t}\r\n\t\t\t\t\tbreak;\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\tif (!arcs) {\r\n\t\t\treturn 0;\r\n\t\t}\r\n\r\n\t\tfor (i = 0, ilen = arcs.length; i < ilen; ++i) {\r\n\t\t\tarc = arcs[i];\r\n\t\t\tif (controller) {\r\n\t\t\t\tcontroller._configure();\r\n\t\t\t\toptions = controller._resolveDataElementOptions(arc, i);\r\n\t\t\t} else {\r\n\t\t\t\toptions = arc._options;\r\n\t\t\t}\r\n\t\t\tif (options.borderAlign !== 'inner') {\r\n\t\t\t\tborderWidth = options.borderWidth;\r\n\t\t\t\thoverWidth = options.hoverBorderWidth;\r\n\r\n\t\t\t\tmax = borderWidth > max ? borderWidth : max;\r\n\t\t\t\tmax = hoverWidth > max ? hoverWidth : max;\r\n\t\t\t}\r\n\t\t}\r\n\t\treturn max;\r\n\t},\r\n\r\n\t/**\r\n\t * @protected\r\n\t */\r\n\tsetHoverStyle: function(arc) {\r\n\t\tvar model = arc._model;\r\n\t\tvar options = arc._options;\r\n\t\tvar getHoverColor = helpers$1.getHoverColor;\r\n\r\n\t\tarc.$previousStyle = {\r\n\t\t\tbackgroundColor: model.backgroundColor,\r\n\t\t\tborderColor: model.borderColor,\r\n\t\t\tborderWidth: model.borderWidth,\r\n\t\t};\r\n\r\n\t\tmodel.backgroundColor = valueOrDefault$5(options.hoverBackgroundColor, getHoverColor(options.backgroundColor));\r\n\t\tmodel.borderColor = valueOrDefault$5(options.hoverBorderColor, getHoverColor(options.borderColor));\r\n\t\tmodel.borderWidth = valueOrDefault$5(options.hoverBorderWidth, options.borderWidth);\r\n\t},\r\n\r\n\t/**\r\n\t * Get radius length offset of the dataset in relation to the visible datasets weights. This allows determining the inner and outer radius correctly\r\n\t * @private\r\n\t */\r\n\t_getRingWeightOffset: function(datasetIndex) {\r\n\t\tvar ringWeightOffset = 0;\r\n\r\n\t\tfor (var i = 0; i < datasetIndex; ++i) {\r\n\t\t\tif (this.chart.isDatasetVisible(i)) {\r\n\t\t\t\tringWeightOffset += this._getRingWeight(i);\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\treturn ringWeightOffset;\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_getRingWeight: function(dataSetIndex) {\r\n\t\treturn Math.max(valueOrDefault$5(this.chart.data.datasets[dataSetIndex].weight, 1), 0);\r\n\t},\r\n\r\n\t/**\r\n\t * Returns the sum of all visibile data set weights.  This value can be 0.\r\n\t * @private\r\n\t */\r\n\t_getVisibleDatasetWeightTotal: function() {\r\n\t\treturn this._getRingWeightOffset(this.chart.data.datasets.length);\r\n\t}\r\n});\n\ncore_defaults._set('horizontalBar', {\r\n\thover: {\r\n\t\tmode: 'index',\r\n\t\taxis: 'y'\r\n\t},\r\n\r\n\tscales: {\r\n\t\txAxes: [{\r\n\t\t\ttype: 'linear',\r\n\t\t\tposition: 'bottom'\r\n\t\t}],\r\n\r\n\t\tyAxes: [{\r\n\t\t\ttype: 'category',\r\n\t\t\tposition: 'left',\r\n\t\t\toffset: true,\r\n\t\t\tgridLines: {\r\n\t\t\t\toffsetGridLines: true\r\n\t\t\t}\r\n\t\t}]\r\n\t},\r\n\r\n\telements: {\r\n\t\trectangle: {\r\n\t\t\tborderSkipped: 'left'\r\n\t\t}\r\n\t},\r\n\r\n\ttooltips: {\r\n\t\tmode: 'index',\r\n\t\taxis: 'y'\r\n\t}\r\n});\r\n\r\ncore_defaults._set('global', {\r\n\tdatasets: {\r\n\t\thorizontalBar: {\r\n\t\t\tcategoryPercentage: 0.8,\r\n\t\t\tbarPercentage: 0.9\r\n\t\t}\r\n\t}\r\n});\r\n\r\nvar controller_horizontalBar = controller_bar.extend({\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_getValueScaleId: function() {\r\n\t\treturn this.getMeta().xAxisID;\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_getIndexScaleId: function() {\r\n\t\treturn this.getMeta().yAxisID;\r\n\t}\r\n});\n\nvar valueOrDefault$6 = helpers$1.valueOrDefault;\r\nvar resolve$2 = helpers$1.options.resolve;\r\nvar isPointInArea = helpers$1.canvas._isPointInArea;\r\n\r\ncore_defaults._set('line', {\r\n\tshowLines: true,\r\n\tspanGaps: false,\r\n\r\n\thover: {\r\n\t\tmode: 'label'\r\n\t},\r\n\r\n\tscales: {\r\n\t\txAxes: [{\r\n\t\t\ttype: 'category',\r\n\t\t\tid: 'x-axis-0'\r\n\t\t}],\r\n\t\tyAxes: [{\r\n\t\t\ttype: 'linear',\r\n\t\t\tid: 'y-axis-0'\r\n\t\t}]\r\n\t}\r\n});\r\n\r\nfunction scaleClip(scale, halfBorderWidth) {\r\n\tvar tickOpts = scale && scale.options.ticks || {};\r\n\tvar reverse = tickOpts.reverse;\r\n\tvar min = tickOpts.min === undefined ? halfBorderWidth : 0;\r\n\tvar max = tickOpts.max === undefined ? halfBorderWidth : 0;\r\n\treturn {\r\n\t\tstart: reverse ? max : min,\r\n\t\tend: reverse ? min : max\r\n\t};\r\n}\r\n\r\nfunction defaultClip(xScale, yScale, borderWidth) {\r\n\tvar halfBorderWidth = borderWidth / 2;\r\n\tvar x = scaleClip(xScale, halfBorderWidth);\r\n\tvar y = scaleClip(yScale, halfBorderWidth);\r\n\r\n\treturn {\r\n\t\ttop: y.end,\r\n\t\tright: x.end,\r\n\t\tbottom: y.start,\r\n\t\tleft: x.start\r\n\t};\r\n}\r\n\r\nfunction toClip(value) {\r\n\tvar t, r, b, l;\r\n\r\n\tif (helpers$1.isObject(value)) {\r\n\t\tt = value.top;\r\n\t\tr = value.right;\r\n\t\tb = value.bottom;\r\n\t\tl = value.left;\r\n\t} else {\r\n\t\tt = r = b = l = value;\r\n\t}\r\n\r\n\treturn {\r\n\t\ttop: t,\r\n\t\tright: r,\r\n\t\tbottom: b,\r\n\t\tleft: l\r\n\t};\r\n}\r\n\r\n\r\nvar controller_line = core_datasetController.extend({\r\n\r\n\tdatasetElementType: elements.Line,\r\n\r\n\tdataElementType: elements.Point,\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_datasetElementOptions: [\r\n\t\t'backgroundColor',\r\n\t\t'borderCapStyle',\r\n\t\t'borderColor',\r\n\t\t'borderDash',\r\n\t\t'borderDashOffset',\r\n\t\t'borderJoinStyle',\r\n\t\t'borderWidth',\r\n\t\t'cubicInterpolationMode',\r\n\t\t'fill'\r\n\t],\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_dataElementOptions: {\r\n\t\tbackgroundColor: 'pointBackgroundColor',\r\n\t\tborderColor: 'pointBorderColor',\r\n\t\tborderWidth: 'pointBorderWidth',\r\n\t\thitRadius: 'pointHitRadius',\r\n\t\thoverBackgroundColor: 'pointHoverBackgroundColor',\r\n\t\thoverBorderColor: 'pointHoverBorderColor',\r\n\t\thoverBorderWidth: 'pointHoverBorderWidth',\r\n\t\thoverRadius: 'pointHoverRadius',\r\n\t\tpointStyle: 'pointStyle',\r\n\t\tradius: 'pointRadius',\r\n\t\trotation: 'pointRotation'\r\n\t},\r\n\r\n\tupdate: function(reset) {\r\n\t\tvar me = this;\r\n\t\tvar meta = me.getMeta();\r\n\t\tvar line = meta.dataset;\r\n\t\tvar points = meta.data || [];\r\n\t\tvar options = me.chart.options;\r\n\t\tvar config = me._config;\r\n\t\tvar showLine = me._showLine = valueOrDefault$6(config.showLine, options.showLines);\r\n\t\tvar i, ilen;\r\n\r\n\t\tme._xScale = me.getScaleForId(meta.xAxisID);\r\n\t\tme._yScale = me.getScaleForId(meta.yAxisID);\r\n\r\n\t\t// Update Line\r\n\t\tif (showLine) {\r\n\t\t\t// Compatibility: If the properties are defined with only the old name, use those values\r\n\t\t\tif (config.tension !== undefined && config.lineTension === undefined) {\r\n\t\t\t\tconfig.lineTension = config.tension;\r\n\t\t\t}\r\n\r\n\t\t\t// Utility\r\n\t\t\tline._scale = me._yScale;\r\n\t\t\tline._datasetIndex = me.index;\r\n\t\t\t// Data\r\n\t\t\tline._children = points;\r\n\t\t\t// Model\r\n\t\t\tline._model = me._resolveDatasetElementOptions(line);\r\n\r\n\t\t\tline.pivot();\r\n\t\t}\r\n\r\n\t\t// Update Points\r\n\t\tfor (i = 0, ilen = points.length; i < ilen; ++i) {\r\n\t\t\tme.updateElement(points[i], i, reset);\r\n\t\t}\r\n\r\n\t\tif (showLine && line._model.tension !== 0) {\r\n\t\t\tme.updateBezierControlPoints();\r\n\t\t}\r\n\r\n\t\t// Now pivot the point for animation\r\n\t\tfor (i = 0, ilen = points.length; i < ilen; ++i) {\r\n\t\t\tpoints[i].pivot();\r\n\t\t}\r\n\t},\r\n\r\n\tupdateElement: function(point, index, reset) {\r\n\t\tvar me = this;\r\n\t\tvar meta = me.getMeta();\r\n\t\tvar custom = point.custom || {};\r\n\t\tvar dataset = me.getDataset();\r\n\t\tvar datasetIndex = me.index;\r\n\t\tvar value = dataset.data[index];\r\n\t\tvar xScale = me._xScale;\r\n\t\tvar yScale = me._yScale;\r\n\t\tvar lineModel = meta.dataset._model;\r\n\t\tvar x, y;\r\n\r\n\t\tvar options = me._resolveDataElementOptions(point, index);\r\n\r\n\t\tx = xScale.getPixelForValue(typeof value === 'object' ? value : NaN, index, datasetIndex);\r\n\t\ty = reset ? yScale.getBasePixel() : me.calculatePointY(value, index, datasetIndex);\r\n\r\n\t\t// Utility\r\n\t\tpoint._xScale = xScale;\r\n\t\tpoint._yScale = yScale;\r\n\t\tpoint._options = options;\r\n\t\tpoint._datasetIndex = datasetIndex;\r\n\t\tpoint._index = index;\r\n\r\n\t\t// Desired view properties\r\n\t\tpoint._model = {\r\n\t\t\tx: x,\r\n\t\t\ty: y,\r\n\t\t\tskip: custom.skip || isNaN(x) || isNaN(y),\r\n\t\t\t// Appearance\r\n\t\t\tradius: options.radius,\r\n\t\t\tpointStyle: options.pointStyle,\r\n\t\t\trotation: options.rotation,\r\n\t\t\tbackgroundColor: options.backgroundColor,\r\n\t\t\tborderColor: options.borderColor,\r\n\t\t\tborderWidth: options.borderWidth,\r\n\t\t\ttension: valueOrDefault$6(custom.tension, lineModel ? lineModel.tension : 0),\r\n\t\t\tsteppedLine: lineModel ? lineModel.steppedLine : false,\r\n\t\t\t// Tooltip\r\n\t\t\thitRadius: options.hitRadius\r\n\t\t};\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_resolveDatasetElementOptions: function(element) {\r\n\t\tvar me = this;\r\n\t\tvar config = me._config;\r\n\t\tvar custom = element.custom || {};\r\n\t\tvar options = me.chart.options;\r\n\t\tvar lineOptions = options.elements.line;\r\n\t\tvar values = core_datasetController.prototype._resolveDatasetElementOptions.apply(me, arguments);\r\n\r\n\t\t// The default behavior of lines is to break at null values, according\r\n\t\t// to https://github.com/chartjs/Chart.js/issues/2435#issuecomment-216718158\r\n\t\t// This option gives lines the ability to span gaps\r\n\t\tvalues.spanGaps = valueOrDefault$6(config.spanGaps, options.spanGaps);\r\n\t\tvalues.tension = valueOrDefault$6(config.lineTension, lineOptions.tension);\r\n\t\tvalues.steppedLine = resolve$2([custom.steppedLine, config.steppedLine, lineOptions.stepped]);\r\n\t\tvalues.clip = toClip(valueOrDefault$6(config.clip, defaultClip(me._xScale, me._yScale, values.borderWidth)));\r\n\r\n\t\treturn values;\r\n\t},\r\n\r\n\tcalculatePointY: function(value, index, datasetIndex) {\r\n\t\tvar me = this;\r\n\t\tvar chart = me.chart;\r\n\t\tvar yScale = me._yScale;\r\n\t\tvar sumPos = 0;\r\n\t\tvar sumNeg = 0;\r\n\t\tvar i, ds, dsMeta, stackedRightValue, rightValue, metasets, ilen;\r\n\r\n\t\tif (yScale.options.stacked) {\r\n\t\t\trightValue = +yScale.getRightValue(value);\r\n\t\t\tmetasets = chart._getSortedVisibleDatasetMetas();\r\n\t\t\tilen = metasets.length;\r\n\r\n\t\t\tfor (i = 0; i < ilen; ++i) {\r\n\t\t\t\tdsMeta = metasets[i];\r\n\t\t\t\tif (dsMeta.index === datasetIndex) {\r\n\t\t\t\t\tbreak;\r\n\t\t\t\t}\r\n\r\n\t\t\t\tds = chart.data.datasets[dsMeta.index];\r\n\t\t\t\tif (dsMeta.type === 'line' && dsMeta.yAxisID === yScale.id) {\r\n\t\t\t\t\tstackedRightValue = +yScale.getRightValue(ds.data[index]);\r\n\t\t\t\t\tif (stackedRightValue < 0) {\r\n\t\t\t\t\t\tsumNeg += stackedRightValue || 0;\r\n\t\t\t\t\t} else {\r\n\t\t\t\t\t\tsumPos += stackedRightValue || 0;\r\n\t\t\t\t\t}\r\n\t\t\t\t}\r\n\t\t\t}\r\n\r\n\t\t\tif (rightValue < 0) {\r\n\t\t\t\treturn yScale.getPixelForValue(sumNeg + rightValue);\r\n\t\t\t}\r\n\t\t\treturn yScale.getPixelForValue(sumPos + rightValue);\r\n\t\t}\r\n\t\treturn yScale.getPixelForValue(value);\r\n\t},\r\n\r\n\tupdateBezierControlPoints: function() {\r\n\t\tvar me = this;\r\n\t\tvar chart = me.chart;\r\n\t\tvar meta = me.getMeta();\r\n\t\tvar lineModel = meta.dataset._model;\r\n\t\tvar area = chart.chartArea;\r\n\t\tvar points = meta.data || [];\r\n\t\tvar i, ilen, model, controlPoints;\r\n\r\n\t\t// Only consider points that are drawn in case the spanGaps option is used\r\n\t\tif (lineModel.spanGaps) {\r\n\t\t\tpoints = points.filter(function(pt) {\r\n\t\t\t\treturn !pt._model.skip;\r\n\t\t\t});\r\n\t\t}\r\n\r\n\t\tfunction capControlPoint(pt, min, max) {\r\n\t\t\treturn Math.max(Math.min(pt, max), min);\r\n\t\t}\r\n\r\n\t\tif (lineModel.cubicInterpolationMode === 'monotone') {\r\n\t\t\thelpers$1.splineCurveMonotone(points);\r\n\t\t} else {\r\n\t\t\tfor (i = 0, ilen = points.length; i < ilen; ++i) {\r\n\t\t\t\tmodel = points[i]._model;\r\n\t\t\t\tcontrolPoints = helpers$1.splineCurve(\r\n\t\t\t\t\thelpers$1.previousItem(points, i)._model,\r\n\t\t\t\t\tmodel,\r\n\t\t\t\t\thelpers$1.nextItem(points, i)._model,\r\n\t\t\t\t\tlineModel.tension\r\n\t\t\t\t);\r\n\t\t\t\tmodel.controlPointPreviousX = controlPoints.previous.x;\r\n\t\t\t\tmodel.controlPointPreviousY = controlPoints.previous.y;\r\n\t\t\t\tmodel.controlPointNextX = controlPoints.next.x;\r\n\t\t\t\tmodel.controlPointNextY = controlPoints.next.y;\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\tif (chart.options.elements.line.capBezierPoints) {\r\n\t\t\tfor (i = 0, ilen = points.length; i < ilen; ++i) {\r\n\t\t\t\tmodel = points[i]._model;\r\n\t\t\t\tif (isPointInArea(model, area)) {\r\n\t\t\t\t\tif (i > 0 && isPointInArea(points[i - 1]._model, area)) {\r\n\t\t\t\t\t\tmodel.controlPointPreviousX = capControlPoint(model.controlPointPreviousX, area.left, area.right);\r\n\t\t\t\t\t\tmodel.controlPointPreviousY = capControlPoint(model.controlPointPreviousY, area.top, area.bottom);\r\n\t\t\t\t\t}\r\n\t\t\t\t\tif (i < points.length - 1 && isPointInArea(points[i + 1]._model, area)) {\r\n\t\t\t\t\t\tmodel.controlPointNextX = capControlPoint(model.controlPointNextX, area.left, area.right);\r\n\t\t\t\t\t\tmodel.controlPointNextY = capControlPoint(model.controlPointNextY, area.top, area.bottom);\r\n\t\t\t\t\t}\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t}\r\n\t},\r\n\r\n\tdraw: function() {\r\n\t\tvar me = this;\r\n\t\tvar chart = me.chart;\r\n\t\tvar meta = me.getMeta();\r\n\t\tvar points = meta.data || [];\r\n\t\tvar area = chart.chartArea;\r\n\t\tvar canvas = chart.canvas;\r\n\t\tvar i = 0;\r\n\t\tvar ilen = points.length;\r\n\t\tvar clip;\r\n\r\n\t\tif (me._showLine) {\r\n\t\t\tclip = meta.dataset._model.clip;\r\n\r\n\t\t\thelpers$1.canvas.clipArea(chart.ctx, {\r\n\t\t\t\tleft: clip.left === false ? 0 : area.left - clip.left,\r\n\t\t\t\tright: clip.right === false ? canvas.width : area.right + clip.right,\r\n\t\t\t\ttop: clip.top === false ? 0 : area.top - clip.top,\r\n\t\t\t\tbottom: clip.bottom === false ? canvas.height : area.bottom + clip.bottom\r\n\t\t\t});\r\n\r\n\t\t\tmeta.dataset.draw();\r\n\r\n\t\t\thelpers$1.canvas.unclipArea(chart.ctx);\r\n\t\t}\r\n\r\n\t\t// Draw the points\r\n\t\tfor (; i < ilen; ++i) {\r\n\t\t\tpoints[i].draw(area);\r\n\t\t}\r\n\t},\r\n\r\n\t/**\r\n\t * @protected\r\n\t */\r\n\tsetHoverStyle: function(point) {\r\n\t\tvar model = point._model;\r\n\t\tvar options = point._options;\r\n\t\tvar getHoverColor = helpers$1.getHoverColor;\r\n\r\n\t\tpoint.$previousStyle = {\r\n\t\t\tbackgroundColor: model.backgroundColor,\r\n\t\t\tborderColor: model.borderColor,\r\n\t\t\tborderWidth: model.borderWidth,\r\n\t\t\tradius: model.radius\r\n\t\t};\r\n\r\n\t\tmodel.backgroundColor = valueOrDefault$6(options.hoverBackgroundColor, getHoverColor(options.backgroundColor));\r\n\t\tmodel.borderColor = valueOrDefault$6(options.hoverBorderColor, getHoverColor(options.borderColor));\r\n\t\tmodel.borderWidth = valueOrDefault$6(options.hoverBorderWidth, options.borderWidth);\r\n\t\tmodel.radius = valueOrDefault$6(options.hoverRadius, options.radius);\r\n\t},\r\n});\n\nvar resolve$3 = helpers$1.options.resolve;\r\n\r\ncore_defaults._set('polarArea', {\r\n\tscale: {\r\n\t\ttype: 'radialLinear',\r\n\t\tangleLines: {\r\n\t\t\tdisplay: false\r\n\t\t},\r\n\t\tgridLines: {\r\n\t\t\tcircular: true\r\n\t\t},\r\n\t\tpointLabels: {\r\n\t\t\tdisplay: false\r\n\t\t},\r\n\t\tticks: {\r\n\t\t\tbeginAtZero: true\r\n\t\t}\r\n\t},\r\n\r\n\t// Boolean - Whether to animate the rotation of the chart\r\n\tanimation: {\r\n\t\tanimateRotate: true,\r\n\t\tanimateScale: true\r\n\t},\r\n\r\n\tstartAngle: -0.5 * Math.PI,\r\n\tlegendCallback: function(chart) {\r\n\t\tvar list = document.createElement('ul');\r\n\t\tvar data = chart.data;\r\n\t\tvar datasets = data.datasets;\r\n\t\tvar labels = data.labels;\r\n\t\tvar i, ilen, listItem, listItemSpan;\r\n\r\n\t\tlist.setAttribute('class', chart.id + '-legend');\r\n\t\tif (datasets.length) {\r\n\t\t\tfor (i = 0, ilen = datasets[0].data.length; i < ilen; ++i) {\r\n\t\t\t\tlistItem = list.appendChild(document.createElement('li'));\r\n\t\t\t\tlistItemSpan = listItem.appendChild(document.createElement('span'));\r\n\t\t\t\tlistItemSpan.style.backgroundColor = datasets[0].backgroundColor[i];\r\n\t\t\t\tif (labels[i]) {\r\n\t\t\t\t\tlistItem.appendChild(document.createTextNode(labels[i]));\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\treturn list.outerHTML;\r\n\t},\r\n\tlegend: {\r\n\t\tlabels: {\r\n\t\t\tgenerateLabels: function(chart) {\r\n\t\t\t\tvar data = chart.data;\r\n\t\t\t\tif (data.labels.length && data.datasets.length) {\r\n\t\t\t\t\treturn data.labels.map(function(label, i) {\r\n\t\t\t\t\t\tvar meta = chart.getDatasetMeta(0);\r\n\t\t\t\t\t\tvar style = meta.controller.getStyle(i);\r\n\r\n\t\t\t\t\t\treturn {\r\n\t\t\t\t\t\t\ttext: label,\r\n\t\t\t\t\t\t\tfillStyle: style.backgroundColor,\r\n\t\t\t\t\t\t\tstrokeStyle: style.borderColor,\r\n\t\t\t\t\t\t\tlineWidth: style.borderWidth,\r\n\t\t\t\t\t\t\thidden: isNaN(data.datasets[0].data[i]) || meta.data[i].hidden,\r\n\r\n\t\t\t\t\t\t\t// Extra data used for toggling the correct item\r\n\t\t\t\t\t\t\tindex: i\r\n\t\t\t\t\t\t};\r\n\t\t\t\t\t});\r\n\t\t\t\t}\r\n\t\t\t\treturn [];\r\n\t\t\t}\r\n\t\t},\r\n\r\n\t\tonClick: function(e, legendItem) {\r\n\t\t\tvar index = legendItem.index;\r\n\t\t\tvar chart = this.chart;\r\n\t\t\tvar i, ilen, meta;\r\n\r\n\t\t\tfor (i = 0, ilen = (chart.data.datasets || []).length; i < ilen; ++i) {\r\n\t\t\t\tmeta = chart.getDatasetMeta(i);\r\n\t\t\t\tmeta.data[index].hidden = !meta.data[index].hidden;\r\n\t\t\t}\r\n\r\n\t\t\tchart.update();\r\n\t\t}\r\n\t},\r\n\r\n\t// Need to override these to give a nice default\r\n\ttooltips: {\r\n\t\tcallbacks: {\r\n\t\t\ttitle: function() {\r\n\t\t\t\treturn '';\r\n\t\t\t},\r\n\t\t\tlabel: function(item, data) {\r\n\t\t\t\treturn data.labels[item.index] + ': ' + item.yLabel;\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n});\r\n\r\nvar controller_polarArea = core_datasetController.extend({\r\n\r\n\tdataElementType: elements.Arc,\r\n\r\n\tlinkScales: helpers$1.noop,\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_dataElementOptions: [\r\n\t\t'backgroundColor',\r\n\t\t'borderColor',\r\n\t\t'borderWidth',\r\n\t\t'borderAlign',\r\n\t\t'hoverBackgroundColor',\r\n\t\t'hoverBorderColor',\r\n\t\t'hoverBorderWidth',\r\n\t],\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_getIndexScaleId: function() {\r\n\t\treturn this.chart.scale.id;\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_getValueScaleId: function() {\r\n\t\treturn this.chart.scale.id;\r\n\t},\r\n\r\n\tupdate: function(reset) {\r\n\t\tvar me = this;\r\n\t\tvar dataset = me.getDataset();\r\n\t\tvar meta = me.getMeta();\r\n\t\tvar start = me.chart.options.startAngle || 0;\r\n\t\tvar starts = me._starts = [];\r\n\t\tvar angles = me._angles = [];\r\n\t\tvar arcs = meta.data;\r\n\t\tvar i, ilen, angle;\r\n\r\n\t\tme._updateRadius();\r\n\r\n\t\tmeta.count = me.countVisibleElements();\r\n\r\n\t\tfor (i = 0, ilen = dataset.data.length; i < ilen; i++) {\r\n\t\t\tstarts[i] = start;\r\n\t\t\tangle = me._computeAngle(i);\r\n\t\t\tangles[i] = angle;\r\n\t\t\tstart += angle;\r\n\t\t}\r\n\r\n\t\tfor (i = 0, ilen = arcs.length; i < ilen; ++i) {\r\n\t\t\tarcs[i]._options = me._resolveDataElementOptions(arcs[i], i);\r\n\t\t\tme.updateElement(arcs[i], i, reset);\r\n\t\t}\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_updateRadius: function() {\r\n\t\tvar me = this;\r\n\t\tvar chart = me.chart;\r\n\t\tvar chartArea = chart.chartArea;\r\n\t\tvar opts = chart.options;\r\n\t\tvar minSize = Math.min(chartArea.right - chartArea.left, chartArea.bottom - chartArea.top);\r\n\r\n\t\tchart.outerRadius = Math.max(minSize / 2, 0);\r\n\t\tchart.innerRadius = Math.max(opts.cutoutPercentage ? (chart.outerRadius / 100) * (opts.cutoutPercentage) : 1, 0);\r\n\t\tchart.radiusLength = (chart.outerRadius - chart.innerRadius) / chart.getVisibleDatasetCount();\r\n\r\n\t\tme.outerRadius = chart.outerRadius - (chart.radiusLength * me.index);\r\n\t\tme.innerRadius = me.outerRadius - chart.radiusLength;\r\n\t},\r\n\r\n\tupdateElement: function(arc, index, reset) {\r\n\t\tvar me = this;\r\n\t\tvar chart = me.chart;\r\n\t\tvar dataset = me.getDataset();\r\n\t\tvar opts = chart.options;\r\n\t\tvar animationOpts = opts.animation;\r\n\t\tvar scale = chart.scale;\r\n\t\tvar labels = chart.data.labels;\r\n\r\n\t\tvar centerX = scale.xCenter;\r\n\t\tvar centerY = scale.yCenter;\r\n\r\n\t\t// var negHalfPI = -0.5 * Math.PI;\r\n\t\tvar datasetStartAngle = opts.startAngle;\r\n\t\tvar distance = arc.hidden ? 0 : scale.getDistanceFromCenterForValue(dataset.data[index]);\r\n\t\tvar startAngle = me._starts[index];\r\n\t\tvar endAngle = startAngle + (arc.hidden ? 0 : me._angles[index]);\r\n\r\n\t\tvar resetRadius = animationOpts.animateScale ? 0 : scale.getDistanceFromCenterForValue(dataset.data[index]);\r\n\t\tvar options = arc._options || {};\r\n\r\n\t\thelpers$1.extend(arc, {\r\n\t\t\t// Utility\r\n\t\t\t_datasetIndex: me.index,\r\n\t\t\t_index: index,\r\n\t\t\t_scale: scale,\r\n\r\n\t\t\t// Desired view properties\r\n\t\t\t_model: {\r\n\t\t\t\tbackgroundColor: options.backgroundColor,\r\n\t\t\t\tborderColor: options.borderColor,\r\n\t\t\t\tborderWidth: options.borderWidth,\r\n\t\t\t\tborderAlign: options.borderAlign,\r\n\t\t\t\tx: centerX,\r\n\t\t\t\ty: centerY,\r\n\t\t\t\tinnerRadius: 0,\r\n\t\t\t\touterRadius: reset ? resetRadius : distance,\r\n\t\t\t\tstartAngle: reset && animationOpts.animateRotate ? datasetStartAngle : startAngle,\r\n\t\t\t\tendAngle: reset && animationOpts.animateRotate ? datasetStartAngle : endAngle,\r\n\t\t\t\tlabel: helpers$1.valueAtIndexOrDefault(labels, index, labels[index])\r\n\t\t\t}\r\n\t\t});\r\n\r\n\t\tarc.pivot();\r\n\t},\r\n\r\n\tcountVisibleElements: function() {\r\n\t\tvar dataset = this.getDataset();\r\n\t\tvar meta = this.getMeta();\r\n\t\tvar count = 0;\r\n\r\n\t\thelpers$1.each(meta.data, function(element, index) {\r\n\t\t\tif (!isNaN(dataset.data[index]) && !element.hidden) {\r\n\t\t\t\tcount++;\r\n\t\t\t}\r\n\t\t});\r\n\r\n\t\treturn count;\r\n\t},\r\n\r\n\t/**\r\n\t * @protected\r\n\t */\r\n\tsetHoverStyle: function(arc) {\r\n\t\tvar model = arc._model;\r\n\t\tvar options = arc._options;\r\n\t\tvar getHoverColor = helpers$1.getHoverColor;\r\n\t\tvar valueOrDefault = helpers$1.valueOrDefault;\r\n\r\n\t\tarc.$previousStyle = {\r\n\t\t\tbackgroundColor: model.backgroundColor,\r\n\t\t\tborderColor: model.borderColor,\r\n\t\t\tborderWidth: model.borderWidth,\r\n\t\t};\r\n\r\n\t\tmodel.backgroundColor = valueOrDefault(options.hoverBackgroundColor, getHoverColor(options.backgroundColor));\r\n\t\tmodel.borderColor = valueOrDefault(options.hoverBorderColor, getHoverColor(options.borderColor));\r\n\t\tmodel.borderWidth = valueOrDefault(options.hoverBorderWidth, options.borderWidth);\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_computeAngle: function(index) {\r\n\t\tvar me = this;\r\n\t\tvar count = this.getMeta().count;\r\n\t\tvar dataset = me.getDataset();\r\n\t\tvar meta = me.getMeta();\r\n\r\n\t\tif (isNaN(dataset.data[index]) || meta.data[index].hidden) {\r\n\t\t\treturn 0;\r\n\t\t}\r\n\r\n\t\t// Scriptable options\r\n\t\tvar context = {\r\n\t\t\tchart: me.chart,\r\n\t\t\tdataIndex: index,\r\n\t\t\tdataset: dataset,\r\n\t\t\tdatasetIndex: me.index\r\n\t\t};\r\n\r\n\t\treturn resolve$3([\r\n\t\t\tme.chart.options.elements.arc.angle,\r\n\t\t\t(2 * Math.PI) / count\r\n\t\t], context, index);\r\n\t}\r\n});\n\ncore_defaults._set('pie', helpers$1.clone(core_defaults.doughnut));\r\ncore_defaults._set('pie', {\r\n\tcutoutPercentage: 0\r\n});\r\n\r\n// Pie charts are Doughnut chart with different defaults\r\nvar controller_pie = controller_doughnut;\n\nvar valueOrDefault$7 = helpers$1.valueOrDefault;\r\n\r\ncore_defaults._set('radar', {\r\n\tspanGaps: false,\r\n\tscale: {\r\n\t\ttype: 'radialLinear'\r\n\t},\r\n\telements: {\r\n\t\tline: {\r\n\t\t\tfill: 'start',\r\n\t\t\ttension: 0 // no bezier in radar\r\n\t\t}\r\n\t}\r\n});\r\n\r\nvar controller_radar = core_datasetController.extend({\r\n\tdatasetElementType: elements.Line,\r\n\r\n\tdataElementType: elements.Point,\r\n\r\n\tlinkScales: helpers$1.noop,\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_datasetElementOptions: [\r\n\t\t'backgroundColor',\r\n\t\t'borderWidth',\r\n\t\t'borderColor',\r\n\t\t'borderCapStyle',\r\n\t\t'borderDash',\r\n\t\t'borderDashOffset',\r\n\t\t'borderJoinStyle',\r\n\t\t'fill'\r\n\t],\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_dataElementOptions: {\r\n\t\tbackgroundColor: 'pointBackgroundColor',\r\n\t\tborderColor: 'pointBorderColor',\r\n\t\tborderWidth: 'pointBorderWidth',\r\n\t\thitRadius: 'pointHitRadius',\r\n\t\thoverBackgroundColor: 'pointHoverBackgroundColor',\r\n\t\thoverBorderColor: 'pointHoverBorderColor',\r\n\t\thoverBorderWidth: 'pointHoverBorderWidth',\r\n\t\thoverRadius: 'pointHoverRadius',\r\n\t\tpointStyle: 'pointStyle',\r\n\t\tradius: 'pointRadius',\r\n\t\trotation: 'pointRotation'\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_getIndexScaleId: function() {\r\n\t\treturn this.chart.scale.id;\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_getValueScaleId: function() {\r\n\t\treturn this.chart.scale.id;\r\n\t},\r\n\r\n\tupdate: function(reset) {\r\n\t\tvar me = this;\r\n\t\tvar meta = me.getMeta();\r\n\t\tvar line = meta.dataset;\r\n\t\tvar points = meta.data || [];\r\n\t\tvar scale = me.chart.scale;\r\n\t\tvar config = me._config;\r\n\t\tvar i, ilen;\r\n\r\n\t\t// Compatibility: If the properties are defined with only the old name, use those values\r\n\t\tif (config.tension !== undefined && config.lineTension === undefined) {\r\n\t\t\tconfig.lineTension = config.tension;\r\n\t\t}\r\n\r\n\t\t// Utility\r\n\t\tline._scale = scale;\r\n\t\tline._datasetIndex = me.index;\r\n\t\t// Data\r\n\t\tline._children = points;\r\n\t\tline._loop = true;\r\n\t\t// Model\r\n\t\tline._model = me._resolveDatasetElementOptions(line);\r\n\r\n\t\tline.pivot();\r\n\r\n\t\t// Update Points\r\n\t\tfor (i = 0, ilen = points.length; i < ilen; ++i) {\r\n\t\t\tme.updateElement(points[i], i, reset);\r\n\t\t}\r\n\r\n\t\t// Update bezier control points\r\n\t\tme.updateBezierControlPoints();\r\n\r\n\t\t// Now pivot the point for animation\r\n\t\tfor (i = 0, ilen = points.length; i < ilen; ++i) {\r\n\t\t\tpoints[i].pivot();\r\n\t\t}\r\n\t},\r\n\r\n\tupdateElement: function(point, index, reset) {\r\n\t\tvar me = this;\r\n\t\tvar custom = point.custom || {};\r\n\t\tvar dataset = me.getDataset();\r\n\t\tvar scale = me.chart.scale;\r\n\t\tvar pointPosition = scale.getPointPositionForValue(index, dataset.data[index]);\r\n\t\tvar options = me._resolveDataElementOptions(point, index);\r\n\t\tvar lineModel = me.getMeta().dataset._model;\r\n\t\tvar x = reset ? scale.xCenter : pointPosition.x;\r\n\t\tvar y = reset ? scale.yCenter : pointPosition.y;\r\n\r\n\t\t// Utility\r\n\t\tpoint._scale = scale;\r\n\t\tpoint._options = options;\r\n\t\tpoint._datasetIndex = me.index;\r\n\t\tpoint._index = index;\r\n\r\n\t\t// Desired view properties\r\n\t\tpoint._model = {\r\n\t\t\tx: x, // value not used in dataset scale, but we want a consistent API between scales\r\n\t\t\ty: y,\r\n\t\t\tskip: custom.skip || isNaN(x) || isNaN(y),\r\n\t\t\t// Appearance\r\n\t\t\tradius: options.radius,\r\n\t\t\tpointStyle: options.pointStyle,\r\n\t\t\trotation: options.rotation,\r\n\t\t\tbackgroundColor: options.backgroundColor,\r\n\t\t\tborderColor: options.borderColor,\r\n\t\t\tborderWidth: options.borderWidth,\r\n\t\t\ttension: valueOrDefault$7(custom.tension, lineModel ? lineModel.tension : 0),\r\n\r\n\t\t\t// Tooltip\r\n\t\t\thitRadius: options.hitRadius\r\n\t\t};\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_resolveDatasetElementOptions: function() {\r\n\t\tvar me = this;\r\n\t\tvar config = me._config;\r\n\t\tvar options = me.chart.options;\r\n\t\tvar values = core_datasetController.prototype._resolveDatasetElementOptions.apply(me, arguments);\r\n\r\n\t\tvalues.spanGaps = valueOrDefault$7(config.spanGaps, options.spanGaps);\r\n\t\tvalues.tension = valueOrDefault$7(config.lineTension, options.elements.line.tension);\r\n\r\n\t\treturn values;\r\n\t},\r\n\r\n\tupdateBezierControlPoints: function() {\r\n\t\tvar me = this;\r\n\t\tvar meta = me.getMeta();\r\n\t\tvar area = me.chart.chartArea;\r\n\t\tvar points = meta.data || [];\r\n\t\tvar i, ilen, model, controlPoints;\r\n\r\n\t\t// Only consider points that are drawn in case the spanGaps option is used\r\n\t\tif (meta.dataset._model.spanGaps) {\r\n\t\t\tpoints = points.filter(function(pt) {\r\n\t\t\t\treturn !pt._model.skip;\r\n\t\t\t});\r\n\t\t}\r\n\r\n\t\tfunction capControlPoint(pt, min, max) {\r\n\t\t\treturn Math.max(Math.min(pt, max), min);\r\n\t\t}\r\n\r\n\t\tfor (i = 0, ilen = points.length; i < ilen; ++i) {\r\n\t\t\tmodel = points[i]._model;\r\n\t\t\tcontrolPoints = helpers$1.splineCurve(\r\n\t\t\t\thelpers$1.previousItem(points, i, true)._model,\r\n\t\t\t\tmodel,\r\n\t\t\t\thelpers$1.nextItem(points, i, true)._model,\r\n\t\t\t\tmodel.tension\r\n\t\t\t);\r\n\r\n\t\t\t// Prevent the bezier going outside of the bounds of the graph\r\n\t\t\tmodel.controlPointPreviousX = capControlPoint(controlPoints.previous.x, area.left, area.right);\r\n\t\t\tmodel.controlPointPreviousY = capControlPoint(controlPoints.previous.y, area.top, area.bottom);\r\n\t\t\tmodel.controlPointNextX = capControlPoint(controlPoints.next.x, area.left, area.right);\r\n\t\t\tmodel.controlPointNextY = capControlPoint(controlPoints.next.y, area.top, area.bottom);\r\n\t\t}\r\n\t},\r\n\r\n\tsetHoverStyle: function(point) {\r\n\t\tvar model = point._model;\r\n\t\tvar options = point._options;\r\n\t\tvar getHoverColor = helpers$1.getHoverColor;\r\n\r\n\t\tpoint.$previousStyle = {\r\n\t\t\tbackgroundColor: model.backgroundColor,\r\n\t\t\tborderColor: model.borderColor,\r\n\t\t\tborderWidth: model.borderWidth,\r\n\t\t\tradius: model.radius\r\n\t\t};\r\n\r\n\t\tmodel.backgroundColor = valueOrDefault$7(options.hoverBackgroundColor, getHoverColor(options.backgroundColor));\r\n\t\tmodel.borderColor = valueOrDefault$7(options.hoverBorderColor, getHoverColor(options.borderColor));\r\n\t\tmodel.borderWidth = valueOrDefault$7(options.hoverBorderWidth, options.borderWidth);\r\n\t\tmodel.radius = valueOrDefault$7(options.hoverRadius, options.radius);\r\n\t}\r\n});\n\ncore_defaults._set('scatter', {\r\n\thover: {\r\n\t\tmode: 'single'\r\n\t},\r\n\r\n\tscales: {\r\n\t\txAxes: [{\r\n\t\t\tid: 'x-axis-1',    // need an ID so datasets can reference the scale\r\n\t\t\ttype: 'linear',    // scatter should not use a category axis\r\n\t\t\tposition: 'bottom'\r\n\t\t}],\r\n\t\tyAxes: [{\r\n\t\t\tid: 'y-axis-1',\r\n\t\t\ttype: 'linear',\r\n\t\t\tposition: 'left'\r\n\t\t}]\r\n\t},\r\n\r\n\ttooltips: {\r\n\t\tcallbacks: {\r\n\t\t\ttitle: function() {\r\n\t\t\t\treturn '';     // doesn't make sense for scatter since data are formatted as a point\r\n\t\t\t},\r\n\t\t\tlabel: function(item) {\r\n\t\t\t\treturn '(' + item.xLabel + ', ' + item.yLabel + ')';\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n});\r\n\r\ncore_defaults._set('global', {\r\n\tdatasets: {\r\n\t\tscatter: {\r\n\t\t\tshowLine: false\r\n\t\t}\r\n\t}\r\n});\r\n\r\n// Scatter charts use line controllers\r\nvar controller_scatter = controller_line;\n\n// NOTE export a map in which the key represents the controller type, not\r\n// the class, and so must be CamelCase in order to be correctly retrieved\r\n// by the controller in core.controller.js (`controllers[meta.type]`).\r\n\r\nvar controllers = {\r\n\tbar: controller_bar,\r\n\tbubble: controller_bubble,\r\n\tdoughnut: controller_doughnut,\r\n\thorizontalBar: controller_horizontalBar,\r\n\tline: controller_line,\r\n\tpolarArea: controller_polarArea,\r\n\tpie: controller_pie,\r\n\tradar: controller_radar,\r\n\tscatter: controller_scatter\r\n};\n\n/**\r\n * Helper function to get relative position for an event\r\n * @param {Event|IEvent} event - The event to get the position for\r\n * @param {Chart} chart - The chart\r\n * @returns {object} the event position\r\n */\r\nfunction getRelativePosition(e, chart) {\r\n\tif (e.native) {\r\n\t\treturn {\r\n\t\t\tx: e.x,\r\n\t\t\ty: e.y\r\n\t\t};\r\n\t}\r\n\r\n\treturn helpers$1.getRelativePosition(e, chart);\r\n}\r\n\r\n/**\r\n * Helper function to traverse all of the visible elements in the chart\r\n * @param {Chart} chart - the chart\r\n * @param {function} handler - the callback to execute for each visible item\r\n */\r\nfunction parseVisibleItems(chart, handler) {\r\n\tvar metasets = chart._getSortedVisibleDatasetMetas();\r\n\tvar metadata, i, j, ilen, jlen, element;\r\n\r\n\tfor (i = 0, ilen = metasets.length; i < ilen; ++i) {\r\n\t\tmetadata = metasets[i].data;\r\n\t\tfor (j = 0, jlen = metadata.length; j < jlen; ++j) {\r\n\t\t\telement = metadata[j];\r\n\t\t\tif (!element._view.skip) {\r\n\t\t\t\thandler(element);\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n}\r\n\r\n/**\r\n * Helper function to get the items that intersect the event position\r\n * @param {ChartElement[]} items - elements to filter\r\n * @param {object} position - the point to be nearest to\r\n * @return {ChartElement[]} the nearest items\r\n */\r\nfunction getIntersectItems(chart, position) {\r\n\tvar elements = [];\r\n\r\n\tparseVisibleItems(chart, function(element) {\r\n\t\tif (element.inRange(position.x, position.y)) {\r\n\t\t\telements.push(element);\r\n\t\t}\r\n\t});\r\n\r\n\treturn elements;\r\n}\r\n\r\n/**\r\n * Helper function to get the items nearest to the event position considering all visible items in teh chart\r\n * @param {Chart} chart - the chart to look at elements from\r\n * @param {object} position - the point to be nearest to\r\n * @param {boolean} intersect - if true, only consider items that intersect the position\r\n * @param {function} distanceMetric - function to provide the distance between points\r\n * @return {ChartElement[]} the nearest items\r\n */\r\nfunction getNearestItems(chart, position, intersect, distanceMetric) {\r\n\tvar minDistance = Number.POSITIVE_INFINITY;\r\n\tvar nearestItems = [];\r\n\r\n\tparseVisibleItems(chart, function(element) {\r\n\t\tif (intersect && !element.inRange(position.x, position.y)) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tvar center = element.getCenterPoint();\r\n\t\tvar distance = distanceMetric(position, center);\r\n\t\tif (distance < minDistance) {\r\n\t\t\tnearestItems = [element];\r\n\t\t\tminDistance = distance;\r\n\t\t} else if (distance === minDistance) {\r\n\t\t\t// Can have multiple items at the same distance in which case we sort by size\r\n\t\t\tnearestItems.push(element);\r\n\t\t}\r\n\t});\r\n\r\n\treturn nearestItems;\r\n}\r\n\r\n/**\r\n * Get a distance metric function for two points based on the\r\n * axis mode setting\r\n * @param {string} axis - the axis mode. x|y|xy\r\n */\r\nfunction getDistanceMetricForAxis(axis) {\r\n\tvar useX = axis.indexOf('x') !== -1;\r\n\tvar useY = axis.indexOf('y') !== -1;\r\n\r\n\treturn function(pt1, pt2) {\r\n\t\tvar deltaX = useX ? Math.abs(pt1.x - pt2.x) : 0;\r\n\t\tvar deltaY = useY ? Math.abs(pt1.y - pt2.y) : 0;\r\n\t\treturn Math.sqrt(Math.pow(deltaX, 2) + Math.pow(deltaY, 2));\r\n\t};\r\n}\r\n\r\nfunction indexMode(chart, e, options) {\r\n\tvar position = getRelativePosition(e, chart);\r\n\t// Default axis for index mode is 'x' to match old behaviour\r\n\toptions.axis = options.axis || 'x';\r\n\tvar distanceMetric = getDistanceMetricForAxis(options.axis);\r\n\tvar items = options.intersect ? getIntersectItems(chart, position) : getNearestItems(chart, position, false, distanceMetric);\r\n\tvar elements = [];\r\n\r\n\tif (!items.length) {\r\n\t\treturn [];\r\n\t}\r\n\r\n\tchart._getSortedVisibleDatasetMetas().forEach(function(meta) {\r\n\t\tvar element = meta.data[items[0]._index];\r\n\r\n\t\t// don't count items that are skipped (null data)\r\n\t\tif (element && !element._view.skip) {\r\n\t\t\telements.push(element);\r\n\t\t}\r\n\t});\r\n\r\n\treturn elements;\r\n}\r\n\r\n/**\r\n * @interface IInteractionOptions\r\n */\r\n/**\r\n * If true, only consider items that intersect the point\r\n * @name IInterfaceOptions#boolean\r\n * @type Boolean\r\n */\r\n\r\n/**\r\n * Contains interaction related functions\r\n * @namespace Chart.Interaction\r\n */\r\nvar core_interaction = {\r\n\t// Helper function for different modes\r\n\tmodes: {\r\n\t\tsingle: function(chart, e) {\r\n\t\t\tvar position = getRelativePosition(e, chart);\r\n\t\t\tvar elements = [];\r\n\r\n\t\t\tparseVisibleItems(chart, function(element) {\r\n\t\t\t\tif (element.inRange(position.x, position.y)) {\r\n\t\t\t\t\telements.push(element);\r\n\t\t\t\t\treturn elements;\r\n\t\t\t\t}\r\n\t\t\t});\r\n\r\n\t\t\treturn elements.slice(0, 1);\r\n\t\t},\r\n\r\n\t\t/**\r\n\t\t * @function Chart.Interaction.modes.label\r\n\t\t * @deprecated since version 2.4.0\r\n\t\t * @todo remove at version 3\r\n\t\t * @private\r\n\t\t */\r\n\t\tlabel: indexMode,\r\n\r\n\t\t/**\r\n\t\t * Returns items at the same index. If the options.intersect parameter is true, we only return items if we intersect something\r\n\t\t * If the options.intersect mode is false, we find the nearest item and return the items at the same index as that item\r\n\t\t * @function Chart.Interaction.modes.index\r\n\t\t * @since v2.4.0\r\n\t\t * @param {Chart} chart - the chart we are returning items from\r\n\t\t * @param {Event} e - the event we are find things at\r\n\t\t * @param {IInteractionOptions} options - options to use during interaction\r\n\t\t * @return {Chart.Element[]} Array of elements that are under the point. If none are found, an empty array is returned\r\n\t\t */\r\n\t\tindex: indexMode,\r\n\r\n\t\t/**\r\n\t\t * Returns items in the same dataset. If the options.intersect parameter is true, we only return items if we intersect something\r\n\t\t * If the options.intersect is false, we find the nearest item and return the items in that dataset\r\n\t\t * @function Chart.Interaction.modes.dataset\r\n\t\t * @param {Chart} chart - the chart we are returning items from\r\n\t\t * @param {Event} e - the event we are find things at\r\n\t\t * @param {IInteractionOptions} options - options to use during interaction\r\n\t\t * @return {Chart.Element[]} Array of elements that are under the point. If none are found, an empty array is returned\r\n\t\t */\r\n\t\tdataset: function(chart, e, options) {\r\n\t\t\tvar position = getRelativePosition(e, chart);\r\n\t\t\toptions.axis = options.axis || 'xy';\r\n\t\t\tvar distanceMetric = getDistanceMetricForAxis(options.axis);\r\n\t\t\tvar items = options.intersect ? getIntersectItems(chart, position) : getNearestItems(chart, position, false, distanceMetric);\r\n\r\n\t\t\tif (items.length > 0) {\r\n\t\t\t\titems = chart.getDatasetMeta(items[0]._datasetIndex).data;\r\n\t\t\t}\r\n\r\n\t\t\treturn items;\r\n\t\t},\r\n\r\n\t\t/**\r\n\t\t * @function Chart.Interaction.modes.x-axis\r\n\t\t * @deprecated since version 2.4.0. Use index mode and intersect == true\r\n\t\t * @todo remove at version 3\r\n\t\t * @private\r\n\t\t */\r\n\t\t'x-axis': function(chart, e) {\r\n\t\t\treturn indexMode(chart, e, {intersect: false});\r\n\t\t},\r\n\r\n\t\t/**\r\n\t\t * Point mode returns all elements that hit test based on the event position\r\n\t\t * of the event\r\n\t\t * @function Chart.Interaction.modes.intersect\r\n\t\t * @param {Chart} chart - the chart we are returning items from\r\n\t\t * @param {Event} e - the event we are find things at\r\n\t\t * @return {Chart.Element[]} Array of elements that are under the point. If none are found, an empty array is returned\r\n\t\t */\r\n\t\tpoint: function(chart, e) {\r\n\t\t\tvar position = getRelativePosition(e, chart);\r\n\t\t\treturn getIntersectItems(chart, position);\r\n\t\t},\r\n\r\n\t\t/**\r\n\t\t * nearest mode returns the element closest to the point\r\n\t\t * @function Chart.Interaction.modes.intersect\r\n\t\t * @param {Chart} chart - the chart we are returning items from\r\n\t\t * @param {Event} e - the event we are find things at\r\n\t\t * @param {IInteractionOptions} options - options to use\r\n\t\t * @return {Chart.Element[]} Array of elements that are under the point. If none are found, an empty array is returned\r\n\t\t */\r\n\t\tnearest: function(chart, e, options) {\r\n\t\t\tvar position = getRelativePosition(e, chart);\r\n\t\t\toptions.axis = options.axis || 'xy';\r\n\t\t\tvar distanceMetric = getDistanceMetricForAxis(options.axis);\r\n\t\t\treturn getNearestItems(chart, position, options.intersect, distanceMetric);\r\n\t\t},\r\n\r\n\t\t/**\r\n\t\t * x mode returns the elements that hit-test at the current x coordinate\r\n\t\t * @function Chart.Interaction.modes.x\r\n\t\t * @param {Chart} chart - the chart we are returning items from\r\n\t\t * @param {Event} e - the event we are find things at\r\n\t\t * @param {IInteractionOptions} options - options to use\r\n\t\t * @return {Chart.Element[]} Array of elements that are under the point. If none are found, an empty array is returned\r\n\t\t */\r\n\t\tx: function(chart, e, options) {\r\n\t\t\tvar position = getRelativePosition(e, chart);\r\n\t\t\tvar items = [];\r\n\t\t\tvar intersectsItem = false;\r\n\r\n\t\t\tparseVisibleItems(chart, function(element) {\r\n\t\t\t\tif (element.inXRange(position.x)) {\r\n\t\t\t\t\titems.push(element);\r\n\t\t\t\t}\r\n\r\n\t\t\t\tif (element.inRange(position.x, position.y)) {\r\n\t\t\t\t\tintersectsItem = true;\r\n\t\t\t\t}\r\n\t\t\t});\r\n\r\n\t\t\t// If we want to trigger on an intersect and we don't have any items\r\n\t\t\t// that intersect the position, return nothing\r\n\t\t\tif (options.intersect && !intersectsItem) {\r\n\t\t\t\titems = [];\r\n\t\t\t}\r\n\t\t\treturn items;\r\n\t\t},\r\n\r\n\t\t/**\r\n\t\t * y mode returns the elements that hit-test at the current y coordinate\r\n\t\t * @function Chart.Interaction.modes.y\r\n\t\t * @param {Chart} chart - the chart we are returning items from\r\n\t\t * @param {Event} e - the event we are find things at\r\n\t\t * @param {IInteractionOptions} options - options to use\r\n\t\t * @return {Chart.Element[]} Array of elements that are under the point. If none are found, an empty array is returned\r\n\t\t */\r\n\t\ty: function(chart, e, options) {\r\n\t\t\tvar position = getRelativePosition(e, chart);\r\n\t\t\tvar items = [];\r\n\t\t\tvar intersectsItem = false;\r\n\r\n\t\t\tparseVisibleItems(chart, function(element) {\r\n\t\t\t\tif (element.inYRange(position.y)) {\r\n\t\t\t\t\titems.push(element);\r\n\t\t\t\t}\r\n\r\n\t\t\t\tif (element.inRange(position.x, position.y)) {\r\n\t\t\t\t\tintersectsItem = true;\r\n\t\t\t\t}\r\n\t\t\t});\r\n\r\n\t\t\t// If we want to trigger on an intersect and we don't have any items\r\n\t\t\t// that intersect the position, return nothing\r\n\t\t\tif (options.intersect && !intersectsItem) {\r\n\t\t\t\titems = [];\r\n\t\t\t}\r\n\t\t\treturn items;\r\n\t\t}\r\n\t}\r\n};\n\nvar extend = helpers$1.extend;\r\n\r\nfunction filterByPosition(array, position) {\r\n\treturn helpers$1.where(array, function(v) {\r\n\t\treturn v.pos === position;\r\n\t});\r\n}\r\n\r\nfunction sortByWeight(array, reverse) {\r\n\treturn array.sort(function(a, b) {\r\n\t\tvar v0 = reverse ? b : a;\r\n\t\tvar v1 = reverse ? a : b;\r\n\t\treturn v0.weight === v1.weight ?\r\n\t\t\tv0.index - v1.index :\r\n\t\t\tv0.weight - v1.weight;\r\n\t});\r\n}\r\n\r\nfunction wrapBoxes(boxes) {\r\n\tvar layoutBoxes = [];\r\n\tvar i, ilen, box;\r\n\r\n\tfor (i = 0, ilen = (boxes || []).length; i < ilen; ++i) {\r\n\t\tbox = boxes[i];\r\n\t\tlayoutBoxes.push({\r\n\t\t\tindex: i,\r\n\t\t\tbox: box,\r\n\t\t\tpos: box.position,\r\n\t\t\thorizontal: box.isHorizontal(),\r\n\t\t\tweight: box.weight\r\n\t\t});\r\n\t}\r\n\treturn layoutBoxes;\r\n}\r\n\r\nfunction setLayoutDims(layouts, params) {\r\n\tvar i, ilen, layout;\r\n\tfor (i = 0, ilen = layouts.length; i < ilen; ++i) {\r\n\t\tlayout = layouts[i];\r\n\t\t// store width used instead of chartArea.w in fitBoxes\r\n\t\tlayout.width = layout.horizontal\r\n\t\t\t? layout.box.fullWidth && params.availableWidth\r\n\t\t\t: params.vBoxMaxWidth;\r\n\t\t// store height used instead of chartArea.h in fitBoxes\r\n\t\tlayout.height = layout.horizontal && params.hBoxMaxHeight;\r\n\t}\r\n}\r\n\r\nfunction buildLayoutBoxes(boxes) {\r\n\tvar layoutBoxes = wrapBoxes(boxes);\r\n\tvar left = sortByWeight(filterByPosition(layoutBoxes, 'left'), true);\r\n\tvar right = sortByWeight(filterByPosition(layoutBoxes, 'right'));\r\n\tvar top = sortByWeight(filterByPosition(layoutBoxes, 'top'), true);\r\n\tvar bottom = sortByWeight(filterByPosition(layoutBoxes, 'bottom'));\r\n\r\n\treturn {\r\n\t\tleftAndTop: left.concat(top),\r\n\t\trightAndBottom: right.concat(bottom),\r\n\t\tchartArea: filterByPosition(layoutBoxes, 'chartArea'),\r\n\t\tvertical: left.concat(right),\r\n\t\thorizontal: top.concat(bottom)\r\n\t};\r\n}\r\n\r\nfunction getCombinedMax(maxPadding, chartArea, a, b) {\r\n\treturn Math.max(maxPadding[a], chartArea[a]) + Math.max(maxPadding[b], chartArea[b]);\r\n}\r\n\r\nfunction updateDims(chartArea, params, layout) {\r\n\tvar box = layout.box;\r\n\tvar maxPadding = chartArea.maxPadding;\r\n\tvar newWidth, newHeight;\r\n\r\n\tif (layout.size) {\r\n\t\t// this layout was already counted for, lets first reduce old size\r\n\t\tchartArea[layout.pos] -= layout.size;\r\n\t}\r\n\tlayout.size = layout.horizontal ? box.height : box.width;\r\n\tchartArea[layout.pos] += layout.size;\r\n\r\n\tif (box.getPadding) {\r\n\t\tvar boxPadding = box.getPadding();\r\n\t\tmaxPadding.top = Math.max(maxPadding.top, boxPadding.top);\r\n\t\tmaxPadding.left = Math.max(maxPadding.left, boxPadding.left);\r\n\t\tmaxPadding.bottom = Math.max(maxPadding.bottom, boxPadding.bottom);\r\n\t\tmaxPadding.right = Math.max(maxPadding.right, boxPadding.right);\r\n\t}\r\n\r\n\tnewWidth = params.outerWidth - getCombinedMax(maxPadding, chartArea, 'left', 'right');\r\n\tnewHeight = params.outerHeight - getCombinedMax(maxPadding, chartArea, 'top', 'bottom');\r\n\r\n\tif (newWidth !== chartArea.w || newHeight !== chartArea.h) {\r\n\t\tchartArea.w = newWidth;\r\n\t\tchartArea.h = newHeight;\r\n\r\n\t\t// return true if chart area changed in layout's direction\r\n\t\tvar sizes = layout.horizontal ? [newWidth, chartArea.w] : [newHeight, chartArea.h];\r\n\t\treturn sizes[0] !== sizes[1] && (!isNaN(sizes[0]) || !isNaN(sizes[1]));\r\n\t}\r\n}\r\n\r\nfunction handleMaxPadding(chartArea) {\r\n\tvar maxPadding = chartArea.maxPadding;\r\n\r\n\tfunction updatePos(pos) {\r\n\t\tvar change = Math.max(maxPadding[pos] - chartArea[pos], 0);\r\n\t\tchartArea[pos] += change;\r\n\t\treturn change;\r\n\t}\r\n\tchartArea.y += updatePos('top');\r\n\tchartArea.x += updatePos('left');\r\n\tupdatePos('right');\r\n\tupdatePos('bottom');\r\n}\r\n\r\nfunction getMargins(horizontal, chartArea) {\r\n\tvar maxPadding = chartArea.maxPadding;\r\n\r\n\tfunction marginForPositions(positions) {\r\n\t\tvar margin = {left: 0, top: 0, right: 0, bottom: 0};\r\n\t\tpositions.forEach(function(pos) {\r\n\t\t\tmargin[pos] = Math.max(chartArea[pos], maxPadding[pos]);\r\n\t\t});\r\n\t\treturn margin;\r\n\t}\r\n\r\n\treturn horizontal\r\n\t\t? marginForPositions(['left', 'right'])\r\n\t\t: marginForPositions(['top', 'bottom']);\r\n}\r\n\r\nfunction fitBoxes(boxes, chartArea, params) {\r\n\tvar refitBoxes = [];\r\n\tvar i, ilen, layout, box, refit, changed;\r\n\r\n\tfor (i = 0, ilen = boxes.length; i < ilen; ++i) {\r\n\t\tlayout = boxes[i];\r\n\t\tbox = layout.box;\r\n\r\n\t\tbox.update(\r\n\t\t\tlayout.width || chartArea.w,\r\n\t\t\tlayout.height || chartArea.h,\r\n\t\t\tgetMargins(layout.horizontal, chartArea)\r\n\t\t);\r\n\t\tif (updateDims(chartArea, params, layout)) {\r\n\t\t\tchanged = true;\r\n\t\t\tif (refitBoxes.length) {\r\n\t\t\t\t// Dimensions changed and there were non full width boxes before this\r\n\t\t\t\t// -> we have to refit those\r\n\t\t\t\trefit = true;\r\n\t\t\t}\r\n\t\t}\r\n\t\tif (!box.fullWidth) { // fullWidth boxes don't need to be re-fitted in any case\r\n\t\t\trefitBoxes.push(layout);\r\n\t\t}\r\n\t}\r\n\r\n\treturn refit ? fitBoxes(refitBoxes, chartArea, params) || changed : changed;\r\n}\r\n\r\nfunction placeBoxes(boxes, chartArea, params) {\r\n\tvar userPadding = params.padding;\r\n\tvar x = chartArea.x;\r\n\tvar y = chartArea.y;\r\n\tvar i, ilen, layout, box;\r\n\r\n\tfor (i = 0, ilen = boxes.length; i < ilen; ++i) {\r\n\t\tlayout = boxes[i];\r\n\t\tbox = layout.box;\r\n\t\tif (layout.horizontal) {\r\n\t\t\tbox.left = box.fullWidth ? userPadding.left : chartArea.left;\r\n\t\t\tbox.right = box.fullWidth ? params.outerWidth - userPadding.right : chartArea.left + chartArea.w;\r\n\t\t\tbox.top = y;\r\n\t\t\tbox.bottom = y + box.height;\r\n\t\t\tbox.width = box.right - box.left;\r\n\t\t\ty = box.bottom;\r\n\t\t} else {\r\n\t\t\tbox.left = x;\r\n\t\t\tbox.right = x + box.width;\r\n\t\t\tbox.top = chartArea.top;\r\n\t\t\tbox.bottom = chartArea.top + chartArea.h;\r\n\t\t\tbox.height = box.bottom - box.top;\r\n\t\t\tx = box.right;\r\n\t\t}\r\n\t}\r\n\r\n\tchartArea.x = x;\r\n\tchartArea.y = y;\r\n}\r\n\r\ncore_defaults._set('global', {\r\n\tlayout: {\r\n\t\tpadding: {\r\n\t\t\ttop: 0,\r\n\t\t\tright: 0,\r\n\t\t\tbottom: 0,\r\n\t\t\tleft: 0\r\n\t\t}\r\n\t}\r\n});\r\n\r\n/**\r\n * @interface ILayoutItem\r\n * @prop {string} position - The position of the item in the chart layout. Possible values are\r\n * 'left', 'top', 'right', 'bottom', and 'chartArea'\r\n * @prop {number} weight - The weight used to sort the item. Higher weights are further away from the chart area\r\n * @prop {boolean} fullWidth - if true, and the item is horizontal, then push vertical boxes down\r\n * @prop {function} isHorizontal - returns true if the layout item is horizontal (ie. top or bottom)\r\n * @prop {function} update - Takes two parameters: width and height. Returns size of item\r\n * @prop {function} getPadding -  Returns an object with padding on the edges\r\n * @prop {number} width - Width of item. Must be valid after update()\r\n * @prop {number} height - Height of item. Must be valid after update()\r\n * @prop {number} left - Left edge of the item. Set by layout system and cannot be used in update\r\n * @prop {number} top - Top edge of the item. Set by layout system and cannot be used in update\r\n * @prop {number} right - Right edge of the item. Set by layout system and cannot be used in update\r\n * @prop {number} bottom - Bottom edge of the item. Set by layout system and cannot be used in update\r\n */\r\n\r\n// The layout service is very self explanatory.  It's responsible for the layout within a chart.\r\n// Scales, Legends and Plugins all rely on the layout service and can easily register to be placed anywhere they need\r\n// It is this service's responsibility of carrying out that layout.\r\nvar core_layouts = {\r\n\tdefaults: {},\r\n\r\n\t/**\r\n\t * Register a box to a chart.\r\n\t * A box is simply a reference to an object that requires layout. eg. Scales, Legend, Title.\r\n\t * @param {Chart} chart - the chart to use\r\n\t * @param {ILayoutItem} item - the item to add to be layed out\r\n\t */\r\n\taddBox: function(chart, item) {\r\n\t\tif (!chart.boxes) {\r\n\t\t\tchart.boxes = [];\r\n\t\t}\r\n\r\n\t\t// initialize item with default values\r\n\t\titem.fullWidth = item.fullWidth || false;\r\n\t\titem.position = item.position || 'top';\r\n\t\titem.weight = item.weight || 0;\r\n\t\titem._layers = item._layers || function() {\r\n\t\t\treturn [{\r\n\t\t\t\tz: 0,\r\n\t\t\t\tdraw: function() {\r\n\t\t\t\t\titem.draw.apply(item, arguments);\r\n\t\t\t\t}\r\n\t\t\t}];\r\n\t\t};\r\n\r\n\t\tchart.boxes.push(item);\r\n\t},\r\n\r\n\t/**\r\n\t * Remove a layoutItem from a chart\r\n\t * @param {Chart} chart - the chart to remove the box from\r\n\t * @param {ILayoutItem} layoutItem - the item to remove from the layout\r\n\t */\r\n\tremoveBox: function(chart, layoutItem) {\r\n\t\tvar index = chart.boxes ? chart.boxes.indexOf(layoutItem) : -1;\r\n\t\tif (index !== -1) {\r\n\t\t\tchart.boxes.splice(index, 1);\r\n\t\t}\r\n\t},\r\n\r\n\t/**\r\n\t * Sets (or updates) options on the given `item`.\r\n\t * @param {Chart} chart - the chart in which the item lives (or will be added to)\r\n\t * @param {ILayoutItem} item - the item to configure with the given options\r\n\t * @param {object} options - the new item options.\r\n\t */\r\n\tconfigure: function(chart, item, options) {\r\n\t\tvar props = ['fullWidth', 'position', 'weight'];\r\n\t\tvar ilen = props.length;\r\n\t\tvar i = 0;\r\n\t\tvar prop;\r\n\r\n\t\tfor (; i < ilen; ++i) {\r\n\t\t\tprop = props[i];\r\n\t\t\tif (options.hasOwnProperty(prop)) {\r\n\t\t\t\titem[prop] = options[prop];\r\n\t\t\t}\r\n\t\t}\r\n\t},\r\n\r\n\t/**\r\n\t * Fits boxes of the given chart into the given size by having each box measure itself\r\n\t * then running a fitting algorithm\r\n\t * @param {Chart} chart - the chart\r\n\t * @param {number} width - the width to fit into\r\n\t * @param {number} height - the height to fit into\r\n\t */\r\n\tupdate: function(chart, width, height) {\r\n\t\tif (!chart) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tvar layoutOptions = chart.options.layout || {};\r\n\t\tvar padding = helpers$1.options.toPadding(layoutOptions.padding);\r\n\r\n\t\tvar availableWidth = width - padding.width;\r\n\t\tvar availableHeight = height - padding.height;\r\n\t\tvar boxes = buildLayoutBoxes(chart.boxes);\r\n\t\tvar verticalBoxes = boxes.vertical;\r\n\t\tvar horizontalBoxes = boxes.horizontal;\r\n\r\n\t\t// Essentially we now have any number of boxes on each of the 4 sides.\r\n\t\t// Our canvas looks like the following.\r\n\t\t// The areas L1 and L2 are the left axes. R1 is the right axis, T1 is the top axis and\r\n\t\t// B1 is the bottom axis\r\n\t\t// There are also 4 quadrant-like locations (left to right instead of clockwise) reserved for chart overlays\r\n\t\t// These locations are single-box locations only, when trying to register a chartArea location that is already taken,\r\n\t\t// an error will be thrown.\r\n\t\t//\r\n\t\t// |----------------------------------------------------|\r\n\t\t// |                  T1 (Full Width)                   |\r\n\t\t// |----------------------------------------------------|\r\n\t\t// |    |    |                 T2                  |    |\r\n\t\t// |    |----|-------------------------------------|----|\r\n\t\t// |    |    | C1 |                           | C2 |    |\r\n\t\t// |    |    |----|                           |----|    |\r\n\t\t// |    |    |                                     |    |\r\n\t\t// | L1 | L2 |           ChartArea (C0)            | R1 |\r\n\t\t// |    |    |                                     |    |\r\n\t\t// |    |    |----|                           |----|    |\r\n\t\t// |    |    | C3 |                           | C4 |    |\r\n\t\t// |    |----|-------------------------------------|----|\r\n\t\t// |    |    |                 B1                  |    |\r\n\t\t// |----------------------------------------------------|\r\n\t\t// |                  B2 (Full Width)                   |\r\n\t\t// |----------------------------------------------------|\r\n\t\t//\r\n\r\n\t\tvar params = Object.freeze({\r\n\t\t\touterWidth: width,\r\n\t\t\touterHeight: height,\r\n\t\t\tpadding: padding,\r\n\t\t\tavailableWidth: availableWidth,\r\n\t\t\tvBoxMaxWidth: availableWidth / 2 / verticalBoxes.length,\r\n\t\t\thBoxMaxHeight: availableHeight / 2\r\n\t\t});\r\n\t\tvar chartArea = extend({\r\n\t\t\tmaxPadding: extend({}, padding),\r\n\t\t\tw: availableWidth,\r\n\t\t\th: availableHeight,\r\n\t\t\tx: padding.left,\r\n\t\t\ty: padding.top\r\n\t\t}, padding);\r\n\r\n\t\tsetLayoutDims(verticalBoxes.concat(horizontalBoxes), params);\r\n\r\n\t\t// First fit vertical boxes\r\n\t\tfitBoxes(verticalBoxes, chartArea, params);\r\n\r\n\t\t// Then fit horizontal boxes\r\n\t\tif (fitBoxes(horizontalBoxes, chartArea, params)) {\r\n\t\t\t// if the area changed, re-fit vertical boxes\r\n\t\t\tfitBoxes(verticalBoxes, chartArea, params);\r\n\t\t}\r\n\r\n\t\thandleMaxPadding(chartArea);\r\n\r\n\t\t// Finally place the boxes to correct coordinates\r\n\t\tplaceBoxes(boxes.leftAndTop, chartArea, params);\r\n\r\n\t\t// Move to opposite side of chart\r\n\t\tchartArea.x += chartArea.w;\r\n\t\tchartArea.y += chartArea.h;\r\n\r\n\t\tplaceBoxes(boxes.rightAndBottom, chartArea, params);\r\n\r\n\t\tchart.chartArea = {\r\n\t\t\tleft: chartArea.left,\r\n\t\t\ttop: chartArea.top,\r\n\t\t\tright: chartArea.left + chartArea.w,\r\n\t\t\tbottom: chartArea.top + chartArea.h\r\n\t\t};\r\n\r\n\t\t// Finally update boxes in chartArea (radial scale for example)\r\n\t\thelpers$1.each(boxes.chartArea, function(layout) {\r\n\t\t\tvar box = layout.box;\r\n\t\t\textend(box, chart.chartArea);\r\n\t\t\tbox.update(chartArea.w, chartArea.h);\r\n\t\t});\r\n\t}\r\n};\n\n/**\r\n * Platform fallback implementation (minimal).\r\n * @see https://github.com/chartjs/Chart.js/pull/4591#issuecomment-319575939\r\n */\r\n\r\nvar platform_basic = {\r\n\tacquireContext: function(item) {\r\n\t\tif (item && item.canvas) {\r\n\t\t\t// Support for any object associated to a canvas (including a context2d)\r\n\t\t\titem = item.canvas;\r\n\t\t}\r\n\r\n\t\treturn item && item.getContext('2d') || null;\r\n\t}\r\n};\n\nvar platform_dom = \"/*\\r\\n * DOM element rendering detection\\r\\n * https://davidwalsh.name/detect-node-insertion\\r\\n */\\r\\n@keyframes chartjs-render-animation {\\r\\n\\tfrom { opacity: 0.99; }\\r\\n\\tto { opacity: 1; }\\r\\n}\\r\\n\\r\\n.chartjs-render-monitor {\\r\\n\\tanimation: chartjs-render-animation 0.001s;\\r\\n}\\r\\n\\r\\n/*\\r\\n * DOM element resizing detection\\r\\n * https://github.com/marcj/css-element-queries\\r\\n */\\r\\n.chartjs-size-monitor,\\r\\n.chartjs-size-monitor-expand,\\r\\n.chartjs-size-monitor-shrink {\\r\\n\\tposition: absolute;\\r\\n\\tdirection: ltr;\\r\\n\\tleft: 0;\\r\\n\\ttop: 0;\\r\\n\\tright: 0;\\r\\n\\tbottom: 0;\\r\\n\\toverflow: hidden;\\r\\n\\tpointer-events: none;\\r\\n\\tvisibility: hidden;\\r\\n\\tz-index: -1;\\r\\n}\\r\\n\\r\\n.chartjs-size-monitor-expand > div {\\r\\n\\tposition: absolute;\\r\\n\\twidth: 1000000px;\\r\\n\\theight: 1000000px;\\r\\n\\tleft: 0;\\r\\n\\ttop: 0;\\r\\n}\\r\\n\\r\\n.chartjs-size-monitor-shrink > div {\\r\\n\\tposition: absolute;\\r\\n\\twidth: 200%;\\r\\n\\theight: 200%;\\r\\n\\tleft: 0;\\r\\n\\ttop: 0;\\r\\n}\\r\\n\";\n\nvar platform_dom$1 = /*#__PURE__*/Object.freeze({\n__proto__: null,\n'default': platform_dom\n});\n\nvar stylesheet = getCjsExportFromNamespace(platform_dom$1);\n\nvar EXPANDO_KEY = '$chartjs';\r\nvar CSS_PREFIX = 'chartjs-';\r\nvar CSS_SIZE_MONITOR = CSS_PREFIX + 'size-monitor';\r\nvar CSS_RENDER_MONITOR = CSS_PREFIX + 'render-monitor';\r\nvar CSS_RENDER_ANIMATION = CSS_PREFIX + 'render-animation';\r\nvar ANIMATION_START_EVENTS = ['animationstart', 'webkitAnimationStart'];\r\n\r\n/**\r\n * DOM event types -> Chart.js event types.\r\n * Note: only events with different types are mapped.\r\n * @see https://developer.mozilla.org/en-US/docs/Web/Events\r\n */\r\nvar EVENT_TYPES = {\r\n\ttouchstart: 'mousedown',\r\n\ttouchmove: 'mousemove',\r\n\ttouchend: 'mouseup',\r\n\tpointerenter: 'mouseenter',\r\n\tpointerdown: 'mousedown',\r\n\tpointermove: 'mousemove',\r\n\tpointerup: 'mouseup',\r\n\tpointerleave: 'mouseout',\r\n\tpointerout: 'mouseout'\r\n};\r\n\r\n/**\r\n * The \"used\" size is the final value of a dimension property after all calculations have\r\n * been performed. This method uses the computed style of `element` but returns undefined\r\n * if the computed style is not expressed in pixels. That can happen in some cases where\r\n * `element` has a size relative to its parent and this last one is not yet displayed,\r\n * for example because of `display: none` on a parent node.\r\n * @see https://developer.mozilla.org/en-US/docs/Web/CSS/used_value\r\n * @returns {number} Size in pixels or undefined if unknown.\r\n */\r\nfunction readUsedSize(element, property) {\r\n\tvar value = helpers$1.getStyle(element, property);\r\n\tvar matches = value && value.match(/^(\\d+)(\\.\\d+)?px$/);\r\n\treturn matches ? Number(matches[1]) : undefined;\r\n}\r\n\r\n/**\r\n * Initializes the canvas style and render size without modifying the canvas display size,\r\n * since responsiveness is handled by the controller.resize() method. The config is used\r\n * to determine the aspect ratio to apply in case no explicit height has been specified.\r\n */\r\nfunction initCanvas(canvas, config) {\r\n\tvar style = canvas.style;\r\n\r\n\t// NOTE(SB) canvas.getAttribute('width') !== canvas.width: in the first case it\r\n\t// returns null or '' if no explicit value has been set to the canvas attribute.\r\n\tvar renderHeight = canvas.getAttribute('height');\r\n\tvar renderWidth = canvas.getAttribute('width');\r\n\r\n\t// Chart.js modifies some canvas values that we want to restore on destroy\r\n\tcanvas[EXPANDO_KEY] = {\r\n\t\tinitial: {\r\n\t\t\theight: renderHeight,\r\n\t\t\twidth: renderWidth,\r\n\t\t\tstyle: {\r\n\t\t\t\tdisplay: style.display,\r\n\t\t\t\theight: style.height,\r\n\t\t\t\twidth: style.width\r\n\t\t\t}\r\n\t\t}\r\n\t};\r\n\r\n\t// Force canvas to display as block to avoid extra space caused by inline\r\n\t// elements, which would interfere with the responsive resize process.\r\n\t// https://github.com/chartjs/Chart.js/issues/2538\r\n\tstyle.display = style.display || 'block';\r\n\r\n\tif (renderWidth === null || renderWidth === '') {\r\n\t\tvar displayWidth = readUsedSize(canvas, 'width');\r\n\t\tif (displayWidth !== undefined) {\r\n\t\t\tcanvas.width = displayWidth;\r\n\t\t}\r\n\t}\r\n\r\n\tif (renderHeight === null || renderHeight === '') {\r\n\t\tif (canvas.style.height === '') {\r\n\t\t\t// If no explicit render height and style height, let's apply the aspect ratio,\r\n\t\t\t// which one can be specified by the user but also by charts as default option\r\n\t\t\t// (i.e. options.aspectRatio). If not specified, use canvas aspect ratio of 2.\r\n\t\t\tcanvas.height = canvas.width / (config.options.aspectRatio || 2);\r\n\t\t} else {\r\n\t\t\tvar displayHeight = readUsedSize(canvas, 'height');\r\n\t\t\tif (displayWidth !== undefined) {\r\n\t\t\t\tcanvas.height = displayHeight;\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n\r\n\treturn canvas;\r\n}\r\n\r\n/**\r\n * Detects support for options object argument in addEventListener.\r\n * https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Safely_detecting_option_support\r\n * @private\r\n */\r\nvar supportsEventListenerOptions = (function() {\r\n\tvar supports = false;\r\n\ttry {\r\n\t\tvar options = Object.defineProperty({}, 'passive', {\r\n\t\t\t// eslint-disable-next-line getter-return\r\n\t\t\tget: function() {\r\n\t\t\t\tsupports = true;\r\n\t\t\t}\r\n\t\t});\r\n\t\twindow.addEventListener('e', null, options);\r\n\t} catch (e) {\r\n\t\t// continue regardless of error\r\n\t}\r\n\treturn supports;\r\n}());\r\n\r\n// Default passive to true as expected by Chrome for 'touchstart' and 'touchend' events.\r\n// https://github.com/chartjs/Chart.js/issues/4287\r\nvar eventListenerOptions = supportsEventListenerOptions ? {passive: true} : false;\r\n\r\nfunction addListener(node, type, listener) {\r\n\tnode.addEventListener(type, listener, eventListenerOptions);\r\n}\r\n\r\nfunction removeListener(node, type, listener) {\r\n\tnode.removeEventListener(type, listener, eventListenerOptions);\r\n}\r\n\r\nfunction createEvent(type, chart, x, y, nativeEvent) {\r\n\treturn {\r\n\t\ttype: type,\r\n\t\tchart: chart,\r\n\t\tnative: nativeEvent || null,\r\n\t\tx: x !== undefined ? x : null,\r\n\t\ty: y !== undefined ? y : null,\r\n\t};\r\n}\r\n\r\nfunction fromNativeEvent(event, chart) {\r\n\tvar type = EVENT_TYPES[event.type] || event.type;\r\n\tvar pos = helpers$1.getRelativePosition(event, chart);\r\n\treturn createEvent(type, chart, pos.x, pos.y, event);\r\n}\r\n\r\nfunction throttled(fn, thisArg) {\r\n\tvar ticking = false;\r\n\tvar args = [];\r\n\r\n\treturn function() {\r\n\t\targs = Array.prototype.slice.call(arguments);\r\n\t\tthisArg = thisArg || this;\r\n\r\n\t\tif (!ticking) {\r\n\t\t\tticking = true;\r\n\t\t\thelpers$1.requestAnimFrame.call(window, function() {\r\n\t\t\t\tticking = false;\r\n\t\t\t\tfn.apply(thisArg, args);\r\n\t\t\t});\r\n\t\t}\r\n\t};\r\n}\r\n\r\nfunction createDiv(cls) {\r\n\tvar el = document.createElement('div');\r\n\tel.className = cls || '';\r\n\treturn el;\r\n}\r\n\r\n// Implementation based on https://github.com/marcj/css-element-queries\r\nfunction createResizer(handler) {\r\n\tvar maxSize = 1000000;\r\n\r\n\t// NOTE(SB) Don't use innerHTML because it could be considered unsafe.\r\n\t// https://github.com/chartjs/Chart.js/issues/5902\r\n\tvar resizer = createDiv(CSS_SIZE_MONITOR);\r\n\tvar expand = createDiv(CSS_SIZE_MONITOR + '-expand');\r\n\tvar shrink = createDiv(CSS_SIZE_MONITOR + '-shrink');\r\n\r\n\texpand.appendChild(createDiv());\r\n\tshrink.appendChild(createDiv());\r\n\r\n\tresizer.appendChild(expand);\r\n\tresizer.appendChild(shrink);\r\n\tresizer._reset = function() {\r\n\t\texpand.scrollLeft = maxSize;\r\n\t\texpand.scrollTop = maxSize;\r\n\t\tshrink.scrollLeft = maxSize;\r\n\t\tshrink.scrollTop = maxSize;\r\n\t};\r\n\r\n\tvar onScroll = function() {\r\n\t\tresizer._reset();\r\n\t\thandler();\r\n\t};\r\n\r\n\taddListener(expand, 'scroll', onScroll.bind(expand, 'expand'));\r\n\taddListener(shrink, 'scroll', onScroll.bind(shrink, 'shrink'));\r\n\r\n\treturn resizer;\r\n}\r\n\r\n// https://davidwalsh.name/detect-node-insertion\r\nfunction watchForRender(node, handler) {\r\n\tvar expando = node[EXPANDO_KEY] || (node[EXPANDO_KEY] = {});\r\n\tvar proxy = expando.renderProxy = function(e) {\r\n\t\tif (e.animationName === CSS_RENDER_ANIMATION) {\r\n\t\t\thandler();\r\n\t\t}\r\n\t};\r\n\r\n\thelpers$1.each(ANIMATION_START_EVENTS, function(type) {\r\n\t\taddListener(node, type, proxy);\r\n\t});\r\n\r\n\t// #4737: Chrome might skip the CSS animation when the CSS_RENDER_MONITOR class\r\n\t// is removed then added back immediately (same animation frame?). Accessing the\r\n\t// `offsetParent` property will force a reflow and re-evaluate the CSS animation.\r\n\t// https://gist.github.com/paulirish/5d52fb081b3570c81e3a#box-metrics\r\n\t// https://github.com/chartjs/Chart.js/issues/4737\r\n\texpando.reflow = !!node.offsetParent;\r\n\r\n\tnode.classList.add(CSS_RENDER_MONITOR);\r\n}\r\n\r\nfunction unwatchForRender(node) {\r\n\tvar expando = node[EXPANDO_KEY] || {};\r\n\tvar proxy = expando.renderProxy;\r\n\r\n\tif (proxy) {\r\n\t\thelpers$1.each(ANIMATION_START_EVENTS, function(type) {\r\n\t\t\tremoveListener(node, type, proxy);\r\n\t\t});\r\n\r\n\t\tdelete expando.renderProxy;\r\n\t}\r\n\r\n\tnode.classList.remove(CSS_RENDER_MONITOR);\r\n}\r\n\r\nfunction addResizeListener(node, listener, chart) {\r\n\tvar expando = node[EXPANDO_KEY] || (node[EXPANDO_KEY] = {});\r\n\r\n\t// Let's keep track of this added resizer and thus avoid DOM query when removing it.\r\n\tvar resizer = expando.resizer = createResizer(throttled(function() {\r\n\t\tif (expando.resizer) {\r\n\t\t\tvar container = chart.options.maintainAspectRatio && node.parentNode;\r\n\t\t\tvar w = container ? container.clientWidth : 0;\r\n\t\t\tlistener(createEvent('resize', chart));\r\n\t\t\tif (container && container.clientWidth < w && chart.canvas) {\r\n\t\t\t\t// If the container size shrank during chart resize, let's assume\r\n\t\t\t\t// scrollbar appeared. So we resize again with the scrollbar visible -\r\n\t\t\t\t// effectively making chart smaller and the scrollbar hidden again.\r\n\t\t\t\t// Because we are inside `throttled`, and currently `ticking`, scroll\r\n\t\t\t\t// events are ignored during this whole 2 resize process.\r\n\t\t\t\t// If we assumed wrong and something else happened, we are resizing\r\n\t\t\t\t// twice in a frame (potential performance issue)\r\n\t\t\t\tlistener(createEvent('resize', chart));\r\n\t\t\t}\r\n\t\t}\r\n\t}));\r\n\r\n\t// The resizer needs to be attached to the node parent, so we first need to be\r\n\t// sure that `node` is attached to the DOM before injecting the resizer element.\r\n\twatchForRender(node, function() {\r\n\t\tif (expando.resizer) {\r\n\t\t\tvar container = node.parentNode;\r\n\t\t\tif (container && container !== resizer.parentNode) {\r\n\t\t\t\tcontainer.insertBefore(resizer, container.firstChild);\r\n\t\t\t}\r\n\r\n\t\t\t// The container size might have changed, let's reset the resizer state.\r\n\t\t\tresizer._reset();\r\n\t\t}\r\n\t});\r\n}\r\n\r\nfunction removeResizeListener(node) {\r\n\tvar expando = node[EXPANDO_KEY] || {};\r\n\tvar resizer = expando.resizer;\r\n\r\n\tdelete expando.resizer;\r\n\tunwatchForRender(node);\r\n\r\n\tif (resizer && resizer.parentNode) {\r\n\t\tresizer.parentNode.removeChild(resizer);\r\n\t}\r\n}\r\n\r\n/**\r\n * Injects CSS styles inline if the styles are not already present.\r\n * @param {HTMLDocument|ShadowRoot} rootNode - the node to contain the <style>.\r\n * @param {string} css - the CSS to be injected.\r\n */\r\nfunction injectCSS(rootNode, css) {\r\n\t// https://stackoverflow.com/q/3922139\r\n\tvar expando = rootNode[EXPANDO_KEY] || (rootNode[EXPANDO_KEY] = {});\r\n\tif (!expando.containsStyles) {\r\n\t\texpando.containsStyles = true;\r\n\t\tcss = '/* Chart.js */\\n' + css;\r\n\t\tvar style = document.createElement('style');\r\n\t\tstyle.setAttribute('type', 'text/css');\r\n\t\tstyle.appendChild(document.createTextNode(css));\r\n\t\trootNode.appendChild(style);\r\n\t}\r\n}\r\n\r\nvar platform_dom$2 = {\r\n\t/**\r\n\t * When `true`, prevents the automatic injection of the stylesheet required to\r\n\t * correctly detect when the chart is added to the DOM and then resized. This\r\n\t * switch has been added to allow external stylesheet (`dist/Chart(.min)?.js`)\r\n\t * to be manually imported to make this library compatible with any CSP.\r\n\t * See https://github.com/chartjs/Chart.js/issues/5208\r\n\t */\r\n\tdisableCSSInjection: false,\r\n\r\n\t/**\r\n\t * This property holds whether this platform is enabled for the current environment.\r\n\t * Currently used by platform.js to select the proper implementation.\r\n\t * @private\r\n\t */\r\n\t_enabled: typeof window !== 'undefined' && typeof document !== 'undefined',\r\n\r\n\t/**\r\n\t * Initializes resources that depend on platform options.\r\n\t * @param {HTMLCanvasElement} canvas - The Canvas element.\r\n\t * @private\r\n\t */\r\n\t_ensureLoaded: function(canvas) {\r\n\t\tif (!this.disableCSSInjection) {\r\n\t\t\t// If the canvas is in a shadow DOM, then the styles must also be inserted\r\n\t\t\t// into the same shadow DOM.\r\n\t\t\t// https://github.com/chartjs/Chart.js/issues/5763\r\n\t\t\tvar root = canvas.getRootNode ? canvas.getRootNode() : document;\r\n\t\t\tvar targetNode = root.host ? root : document.head;\r\n\t\t\tinjectCSS(targetNode, stylesheet);\r\n\t\t}\r\n\t},\r\n\r\n\tacquireContext: function(item, config) {\r\n\t\tif (typeof item === 'string') {\r\n\t\t\titem = document.getElementById(item);\r\n\t\t} else if (item.length) {\r\n\t\t\t// Support for array based queries (such as jQuery)\r\n\t\t\titem = item[0];\r\n\t\t}\r\n\r\n\t\tif (item && item.canvas) {\r\n\t\t\t// Support for any object associated to a canvas (including a context2d)\r\n\t\t\titem = item.canvas;\r\n\t\t}\r\n\r\n\t\t// To prevent canvas fingerprinting, some add-ons undefine the getContext\r\n\t\t// method, for example: https://github.com/kkapsner/CanvasBlocker\r\n\t\t// https://github.com/chartjs/Chart.js/issues/2807\r\n\t\tvar context = item && item.getContext && item.getContext('2d');\r\n\r\n\t\t// `instanceof HTMLCanvasElement/CanvasRenderingContext2D` fails when the item is\r\n\t\t// inside an iframe or when running in a protected environment. We could guess the\r\n\t\t// types from their toString() value but let's keep things flexible and assume it's\r\n\t\t// a sufficient condition if the item has a context2D which has item as `canvas`.\r\n\t\t// https://github.com/chartjs/Chart.js/issues/3887\r\n\t\t// https://github.com/chartjs/Chart.js/issues/4102\r\n\t\t// https://github.com/chartjs/Chart.js/issues/4152\r\n\t\tif (context && context.canvas === item) {\r\n\t\t\t// Load platform resources on first chart creation, to make it possible to\r\n\t\t\t// import the library before setting platform options.\r\n\t\t\tthis._ensureLoaded(item);\r\n\t\t\tinitCanvas(item, config);\r\n\t\t\treturn context;\r\n\t\t}\r\n\r\n\t\treturn null;\r\n\t},\r\n\r\n\treleaseContext: function(context) {\r\n\t\tvar canvas = context.canvas;\r\n\t\tif (!canvas[EXPANDO_KEY]) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tvar initial = canvas[EXPANDO_KEY].initial;\r\n\t\t['height', 'width'].forEach(function(prop) {\r\n\t\t\tvar value = initial[prop];\r\n\t\t\tif (helpers$1.isNullOrUndef(value)) {\r\n\t\t\t\tcanvas.removeAttribute(prop);\r\n\t\t\t} else {\r\n\t\t\t\tcanvas.setAttribute(prop, value);\r\n\t\t\t}\r\n\t\t});\r\n\r\n\t\thelpers$1.each(initial.style || {}, function(value, key) {\r\n\t\t\tcanvas.style[key] = value;\r\n\t\t});\r\n\r\n\t\t// The canvas render size might have been changed (and thus the state stack discarded),\r\n\t\t// we can't use save() and restore() to restore the initial state. So make sure that at\r\n\t\t// least the canvas context is reset to the default state by setting the canvas width.\r\n\t\t// https://www.w3.org/TR/2011/WD-html5-20110525/the-canvas-element.html\r\n\t\t// eslint-disable-next-line no-self-assign\r\n\t\tcanvas.width = canvas.width;\r\n\r\n\t\tdelete canvas[EXPANDO_KEY];\r\n\t},\r\n\r\n\taddEventListener: function(chart, type, listener) {\r\n\t\tvar canvas = chart.canvas;\r\n\t\tif (type === 'resize') {\r\n\t\t\t// Note: the resize event is not supported on all browsers.\r\n\t\t\taddResizeListener(canvas, listener, chart);\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tvar expando = listener[EXPANDO_KEY] || (listener[EXPANDO_KEY] = {});\r\n\t\tvar proxies = expando.proxies || (expando.proxies = {});\r\n\t\tvar proxy = proxies[chart.id + '_' + type] = function(event) {\r\n\t\t\tlistener(fromNativeEvent(event, chart));\r\n\t\t};\r\n\r\n\t\taddListener(canvas, type, proxy);\r\n\t},\r\n\r\n\tremoveEventListener: function(chart, type, listener) {\r\n\t\tvar canvas = chart.canvas;\r\n\t\tif (type === 'resize') {\r\n\t\t\t// Note: the resize event is not supported on all browsers.\r\n\t\t\tremoveResizeListener(canvas);\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tvar expando = listener[EXPANDO_KEY] || {};\r\n\t\tvar proxies = expando.proxies || {};\r\n\t\tvar proxy = proxies[chart.id + '_' + type];\r\n\t\tif (!proxy) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tremoveListener(canvas, type, proxy);\r\n\t}\r\n};\r\n\r\n// DEPRECATIONS\r\n\r\n/**\r\n * Provided for backward compatibility, use EventTarget.addEventListener instead.\r\n * EventTarget.addEventListener compatibility: Chrome, Opera 7, Safari, FF1.5+, IE9+\r\n * @see https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener\r\n * @function Chart.helpers.addEvent\r\n * @deprecated since version 2.7.0\r\n * @todo remove at version 3\r\n * @private\r\n */\r\nhelpers$1.addEvent = addListener;\r\n\r\n/**\r\n * Provided for backward compatibility, use EventTarget.removeEventListener instead.\r\n * EventTarget.removeEventListener compatibility: Chrome, Opera 7, Safari, FF1.5+, IE9+\r\n * @see https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/removeEventListener\r\n * @function Chart.helpers.removeEvent\r\n * @deprecated since version 2.7.0\r\n * @todo remove at version 3\r\n * @private\r\n */\r\nhelpers$1.removeEvent = removeListener;\n\n// @TODO Make possible to select another platform at build time.\r\nvar implementation = platform_dom$2._enabled ? platform_dom$2 : platform_basic;\r\n\r\n/**\r\n * @namespace Chart.platform\r\n * @see https://chartjs.gitbooks.io/proposals/content/Platform.html\r\n * @since 2.4.0\r\n */\r\nvar platform = helpers$1.extend({\r\n\t/**\r\n\t * @since 2.7.0\r\n\t */\r\n\tinitialize: function() {},\r\n\r\n\t/**\r\n\t * Called at chart construction time, returns a context2d instance implementing\r\n\t * the [W3C Canvas 2D Context API standard]{@link https://www.w3.org/TR/2dcontext/}.\r\n\t * @param {*} item - The native item from which to acquire context (platform specific)\r\n\t * @param {object} options - The chart options\r\n\t * @returns {CanvasRenderingContext2D} context2d instance\r\n\t */\r\n\tacquireContext: function() {},\r\n\r\n\t/**\r\n\t * Called at chart destruction time, releases any resources associated to the context\r\n\t * previously returned by the acquireContext() method.\r\n\t * @param {CanvasRenderingContext2D} context - The context2d instance\r\n\t * @returns {boolean} true if the method succeeded, else false\r\n\t */\r\n\treleaseContext: function() {},\r\n\r\n\t/**\r\n\t * Registers the specified listener on the given chart.\r\n\t * @param {Chart} chart - Chart from which to listen for event\r\n\t * @param {string} type - The ({@link IEvent}) type to listen for\r\n\t * @param {function} listener - Receives a notification (an object that implements\r\n\t * the {@link IEvent} interface) when an event of the specified type occurs.\r\n\t */\r\n\taddEventListener: function() {},\r\n\r\n\t/**\r\n\t * Removes the specified listener previously registered with addEventListener.\r\n\t * @param {Chart} chart - Chart from which to remove the listener\r\n\t * @param {string} type - The ({@link IEvent}) type to remove\r\n\t * @param {function} listener - The listener function to remove from the event target.\r\n\t */\r\n\tremoveEventListener: function() {}\r\n\r\n}, implementation);\n\ncore_defaults._set('global', {\r\n\tplugins: {}\r\n});\r\n\r\n/**\r\n * The plugin service singleton\r\n * @namespace Chart.plugins\r\n * @since 2.1.0\r\n */\r\nvar core_plugins = {\r\n\t/**\r\n\t * Globally registered plugins.\r\n\t * @private\r\n\t */\r\n\t_plugins: [],\r\n\r\n\t/**\r\n\t * This identifier is used to invalidate the descriptors cache attached to each chart\r\n\t * when a global plugin is registered or unregistered. In this case, the cache ID is\r\n\t * incremented and descriptors are regenerated during following API calls.\r\n\t * @private\r\n\t */\r\n\t_cacheId: 0,\r\n\r\n\t/**\r\n\t * Registers the given plugin(s) if not already registered.\r\n\t * @param {IPlugin[]|IPlugin} plugins plugin instance(s).\r\n\t */\r\n\tregister: function(plugins) {\r\n\t\tvar p = this._plugins;\r\n\t\t([]).concat(plugins).forEach(function(plugin) {\r\n\t\t\tif (p.indexOf(plugin) === -1) {\r\n\t\t\t\tp.push(plugin);\r\n\t\t\t}\r\n\t\t});\r\n\r\n\t\tthis._cacheId++;\r\n\t},\r\n\r\n\t/**\r\n\t * Unregisters the given plugin(s) only if registered.\r\n\t * @param {IPlugin[]|IPlugin} plugins plugin instance(s).\r\n\t */\r\n\tunregister: function(plugins) {\r\n\t\tvar p = this._plugins;\r\n\t\t([]).concat(plugins).forEach(function(plugin) {\r\n\t\t\tvar idx = p.indexOf(plugin);\r\n\t\t\tif (idx !== -1) {\r\n\t\t\t\tp.splice(idx, 1);\r\n\t\t\t}\r\n\t\t});\r\n\r\n\t\tthis._cacheId++;\r\n\t},\r\n\r\n\t/**\r\n\t * Remove all registered plugins.\r\n\t * @since 2.1.5\r\n\t */\r\n\tclear: function() {\r\n\t\tthis._plugins = [];\r\n\t\tthis._cacheId++;\r\n\t},\r\n\r\n\t/**\r\n\t * Returns the number of registered plugins?\r\n\t * @returns {number}\r\n\t * @since 2.1.5\r\n\t */\r\n\tcount: function() {\r\n\t\treturn this._plugins.length;\r\n\t},\r\n\r\n\t/**\r\n\t * Returns all registered plugin instances.\r\n\t * @returns {IPlugin[]} array of plugin objects.\r\n\t * @since 2.1.5\r\n\t */\r\n\tgetAll: function() {\r\n\t\treturn this._plugins;\r\n\t},\r\n\r\n\t/**\r\n\t * Calls enabled plugins for `chart` on the specified hook and with the given args.\r\n\t * This method immediately returns as soon as a plugin explicitly returns false. The\r\n\t * returned value can be used, for instance, to interrupt the current action.\r\n\t * @param {Chart} chart - The chart instance for which plugins should be called.\r\n\t * @param {string} hook - The name of the plugin method to call (e.g. 'beforeUpdate').\r\n\t * @param {Array} [args] - Extra arguments to apply to the hook call.\r\n\t * @returns {boolean} false if any of the plugins return false, else returns true.\r\n\t */\r\n\tnotify: function(chart, hook, args) {\r\n\t\tvar descriptors = this.descriptors(chart);\r\n\t\tvar ilen = descriptors.length;\r\n\t\tvar i, descriptor, plugin, params, method;\r\n\r\n\t\tfor (i = 0; i < ilen; ++i) {\r\n\t\t\tdescriptor = descriptors[i];\r\n\t\t\tplugin = descriptor.plugin;\r\n\t\t\tmethod = plugin[hook];\r\n\t\t\tif (typeof method === 'function') {\r\n\t\t\t\tparams = [chart].concat(args || []);\r\n\t\t\t\tparams.push(descriptor.options);\r\n\t\t\t\tif (method.apply(plugin, params) === false) {\r\n\t\t\t\t\treturn false;\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\treturn true;\r\n\t},\r\n\r\n\t/**\r\n\t * Returns descriptors of enabled plugins for the given chart.\r\n\t * @returns {object[]} [{ plugin, options }]\r\n\t * @private\r\n\t */\r\n\tdescriptors: function(chart) {\r\n\t\tvar cache = chart.$plugins || (chart.$plugins = {});\r\n\t\tif (cache.id === this._cacheId) {\r\n\t\t\treturn cache.descriptors;\r\n\t\t}\r\n\r\n\t\tvar plugins = [];\r\n\t\tvar descriptors = [];\r\n\t\tvar config = (chart && chart.config) || {};\r\n\t\tvar options = (config.options && config.options.plugins) || {};\r\n\r\n\t\tthis._plugins.concat(config.plugins || []).forEach(function(plugin) {\r\n\t\t\tvar idx = plugins.indexOf(plugin);\r\n\t\t\tif (idx !== -1) {\r\n\t\t\t\treturn;\r\n\t\t\t}\r\n\r\n\t\t\tvar id = plugin.id;\r\n\t\t\tvar opts = options[id];\r\n\t\t\tif (opts === false) {\r\n\t\t\t\treturn;\r\n\t\t\t}\r\n\r\n\t\t\tif (opts === true) {\r\n\t\t\t\topts = helpers$1.clone(core_defaults.global.plugins[id]);\r\n\t\t\t}\r\n\r\n\t\t\tplugins.push(plugin);\r\n\t\t\tdescriptors.push({\r\n\t\t\t\tplugin: plugin,\r\n\t\t\t\toptions: opts || {}\r\n\t\t\t});\r\n\t\t});\r\n\r\n\t\tcache.descriptors = descriptors;\r\n\t\tcache.id = this._cacheId;\r\n\t\treturn descriptors;\r\n\t},\r\n\r\n\t/**\r\n\t * Invalidates cache for the given chart: descriptors hold a reference on plugin option,\r\n\t * but in some cases, this reference can be changed by the user when updating options.\r\n\t * https://github.com/chartjs/Chart.js/issues/5111#issuecomment-355934167\r\n\t * @private\r\n\t */\r\n\t_invalidate: function(chart) {\r\n\t\tdelete chart.$plugins;\r\n\t}\r\n};\n\nvar core_scaleService = {\r\n\t// Scale registration object. Extensions can register new scale types (such as log or DB scales) and then\r\n\t// use the new chart options to grab the correct scale\r\n\tconstructors: {},\r\n\t// Use a registration function so that we can move to an ES6 map when we no longer need to support\r\n\t// old browsers\r\n\r\n\t// Scale config defaults\r\n\tdefaults: {},\r\n\tregisterScaleType: function(type, scaleConstructor, scaleDefaults) {\r\n\t\tthis.constructors[type] = scaleConstructor;\r\n\t\tthis.defaults[type] = helpers$1.clone(scaleDefaults);\r\n\t},\r\n\tgetScaleConstructor: function(type) {\r\n\t\treturn this.constructors.hasOwnProperty(type) ? this.constructors[type] : undefined;\r\n\t},\r\n\tgetScaleDefaults: function(type) {\r\n\t\t// Return the scale defaults merged with the global settings so that we always use the latest ones\r\n\t\treturn this.defaults.hasOwnProperty(type) ? helpers$1.merge(Object.create(null), [core_defaults.scale, this.defaults[type]]) : {};\r\n\t},\r\n\tupdateScaleDefaults: function(type, additions) {\r\n\t\tvar me = this;\r\n\t\tif (me.defaults.hasOwnProperty(type)) {\r\n\t\t\tme.defaults[type] = helpers$1.extend(me.defaults[type], additions);\r\n\t\t}\r\n\t},\r\n\taddScalesToLayout: function(chart) {\r\n\t\t// Adds each scale to the chart.boxes array to be sized accordingly\r\n\t\thelpers$1.each(chart.scales, function(scale) {\r\n\t\t\t// Set ILayoutItem parameters for backwards compatibility\r\n\t\t\tscale.fullWidth = scale.options.fullWidth;\r\n\t\t\tscale.position = scale.options.position;\r\n\t\t\tscale.weight = scale.options.weight;\r\n\t\t\tcore_layouts.addBox(chart, scale);\r\n\t\t});\r\n\t}\r\n};\n\nvar valueOrDefault$8 = helpers$1.valueOrDefault;\r\nvar getRtlHelper = helpers$1.rtl.getRtlAdapter;\r\n\r\ncore_defaults._set('global', {\r\n\ttooltips: {\r\n\t\tenabled: true,\r\n\t\tcustom: null,\r\n\t\tmode: 'nearest',\r\n\t\tposition: 'average',\r\n\t\tintersect: true,\r\n\t\tbackgroundColor: 'rgba(0,0,0,0.8)',\r\n\t\ttitleFontStyle: 'bold',\r\n\t\ttitleSpacing: 2,\r\n\t\ttitleMarginBottom: 6,\r\n\t\ttitleFontColor: '#fff',\r\n\t\ttitleAlign: 'left',\r\n\t\tbodySpacing: 2,\r\n\t\tbodyFontColor: '#fff',\r\n\t\tbodyAlign: 'left',\r\n\t\tfooterFontStyle: 'bold',\r\n\t\tfooterSpacing: 2,\r\n\t\tfooterMarginTop: 6,\r\n\t\tfooterFontColor: '#fff',\r\n\t\tfooterAlign: 'left',\r\n\t\tyPadding: 6,\r\n\t\txPadding: 6,\r\n\t\tcaretPadding: 2,\r\n\t\tcaretSize: 5,\r\n\t\tcornerRadius: 6,\r\n\t\tmultiKeyBackground: '#fff',\r\n\t\tdisplayColors: true,\r\n\t\tborderColor: 'rgba(0,0,0,0)',\r\n\t\tborderWidth: 0,\r\n\t\tcallbacks: {\r\n\t\t\t// Args are: (tooltipItems, data)\r\n\t\t\tbeforeTitle: helpers$1.noop,\r\n\t\t\ttitle: function(tooltipItems, data) {\r\n\t\t\t\tvar title = '';\r\n\t\t\t\tvar labels = data.labels;\r\n\t\t\t\tvar labelCount = labels ? labels.length : 0;\r\n\r\n\t\t\t\tif (tooltipItems.length > 0) {\r\n\t\t\t\t\tvar item = tooltipItems[0];\r\n\t\t\t\t\tif (item.label) {\r\n\t\t\t\t\t\ttitle = item.label;\r\n\t\t\t\t\t} else if (item.xLabel) {\r\n\t\t\t\t\t\ttitle = item.xLabel;\r\n\t\t\t\t\t} else if (labelCount > 0 && item.index < labelCount) {\r\n\t\t\t\t\t\ttitle = labels[item.index];\r\n\t\t\t\t\t}\r\n\t\t\t\t}\r\n\r\n\t\t\t\treturn title;\r\n\t\t\t},\r\n\t\t\tafterTitle: helpers$1.noop,\r\n\r\n\t\t\t// Args are: (tooltipItems, data)\r\n\t\t\tbeforeBody: helpers$1.noop,\r\n\r\n\t\t\t// Args are: (tooltipItem, data)\r\n\t\t\tbeforeLabel: helpers$1.noop,\r\n\t\t\tlabel: function(tooltipItem, data) {\r\n\t\t\t\tvar label = data.datasets[tooltipItem.datasetIndex].label || '';\r\n\r\n\t\t\t\tif (label) {\r\n\t\t\t\t\tlabel += ': ';\r\n\t\t\t\t}\r\n\t\t\t\tif (!helpers$1.isNullOrUndef(tooltipItem.value)) {\r\n\t\t\t\t\tlabel += tooltipItem.value;\r\n\t\t\t\t} else {\r\n\t\t\t\t\tlabel += tooltipItem.yLabel;\r\n\t\t\t\t}\r\n\t\t\t\treturn label;\r\n\t\t\t},\r\n\t\t\tlabelColor: function(tooltipItem, chart) {\r\n\t\t\t\tvar meta = chart.getDatasetMeta(tooltipItem.datasetIndex);\r\n\t\t\t\tvar activeElement = meta.data[tooltipItem.index];\r\n\t\t\t\tvar view = activeElement._view;\r\n\t\t\t\treturn {\r\n\t\t\t\t\tborderColor: view.borderColor,\r\n\t\t\t\t\tbackgroundColor: view.backgroundColor\r\n\t\t\t\t};\r\n\t\t\t},\r\n\t\t\tlabelTextColor: function() {\r\n\t\t\t\treturn this._options.bodyFontColor;\r\n\t\t\t},\r\n\t\t\tafterLabel: helpers$1.noop,\r\n\r\n\t\t\t// Args are: (tooltipItems, data)\r\n\t\t\tafterBody: helpers$1.noop,\r\n\r\n\t\t\t// Args are: (tooltipItems, data)\r\n\t\t\tbeforeFooter: helpers$1.noop,\r\n\t\t\tfooter: helpers$1.noop,\r\n\t\t\tafterFooter: helpers$1.noop\r\n\t\t}\r\n\t}\r\n});\r\n\r\nvar positioners = {\r\n\t/**\r\n\t * Average mode places the tooltip at the average position of the elements shown\r\n\t * @function Chart.Tooltip.positioners.average\r\n\t * @param elements {ChartElement[]} the elements being displayed in the tooltip\r\n\t * @returns {object} tooltip position\r\n\t */\r\n\taverage: function(elements) {\r\n\t\tif (!elements.length) {\r\n\t\t\treturn false;\r\n\t\t}\r\n\r\n\t\tvar i, len;\r\n\t\tvar x = 0;\r\n\t\tvar y = 0;\r\n\t\tvar count = 0;\r\n\r\n\t\tfor (i = 0, len = elements.length; i < len; ++i) {\r\n\t\t\tvar el = elements[i];\r\n\t\t\tif (el && el.hasValue()) {\r\n\t\t\t\tvar pos = el.tooltipPosition();\r\n\t\t\t\tx += pos.x;\r\n\t\t\t\ty += pos.y;\r\n\t\t\t\t++count;\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\treturn {\r\n\t\t\tx: x / count,\r\n\t\t\ty: y / count\r\n\t\t};\r\n\t},\r\n\r\n\t/**\r\n\t * Gets the tooltip position nearest of the item nearest to the event position\r\n\t * @function Chart.Tooltip.positioners.nearest\r\n\t * @param elements {Chart.Element[]} the tooltip elements\r\n\t * @param eventPosition {object} the position of the event in canvas coordinates\r\n\t * @returns {object} the tooltip position\r\n\t */\r\n\tnearest: function(elements, eventPosition) {\r\n\t\tvar x = eventPosition.x;\r\n\t\tvar y = eventPosition.y;\r\n\t\tvar minDistance = Number.POSITIVE_INFINITY;\r\n\t\tvar i, len, nearestElement;\r\n\r\n\t\tfor (i = 0, len = elements.length; i < len; ++i) {\r\n\t\t\tvar el = elements[i];\r\n\t\t\tif (el && el.hasValue()) {\r\n\t\t\t\tvar center = el.getCenterPoint();\r\n\t\t\t\tvar d = helpers$1.distanceBetweenPoints(eventPosition, center);\r\n\r\n\t\t\t\tif (d < minDistance) {\r\n\t\t\t\t\tminDistance = d;\r\n\t\t\t\t\tnearestElement = el;\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\tif (nearestElement) {\r\n\t\t\tvar tp = nearestElement.tooltipPosition();\r\n\t\t\tx = tp.x;\r\n\t\t\ty = tp.y;\r\n\t\t}\r\n\r\n\t\treturn {\r\n\t\t\tx: x,\r\n\t\t\ty: y\r\n\t\t};\r\n\t}\r\n};\r\n\r\n// Helper to push or concat based on if the 2nd parameter is an array or not\r\nfunction pushOrConcat(base, toPush) {\r\n\tif (toPush) {\r\n\t\tif (helpers$1.isArray(toPush)) {\r\n\t\t\t// base = base.concat(toPush);\r\n\t\t\tArray.prototype.push.apply(base, toPush);\r\n\t\t} else {\r\n\t\t\tbase.push(toPush);\r\n\t\t}\r\n\t}\r\n\r\n\treturn base;\r\n}\r\n\r\n/**\r\n * Returns array of strings split by newline\r\n * @param {string} value - The value to split by newline.\r\n * @returns {string[]} value if newline present - Returned from String split() method\r\n * @function\r\n */\r\nfunction splitNewlines(str) {\r\n\tif ((typeof str === 'string' || str instanceof String) && str.indexOf('\\n') > -1) {\r\n\t\treturn str.split('\\n');\r\n\t}\r\n\treturn str;\r\n}\r\n\r\n\r\n/**\r\n * Private helper to create a tooltip item model\r\n * @param element - the chart element (point, arc, bar) to create the tooltip item for\r\n * @return new tooltip item\r\n */\r\nfunction createTooltipItem(element) {\r\n\tvar xScale = element._xScale;\r\n\tvar yScale = element._yScale || element._scale; // handle radar || polarArea charts\r\n\tvar index = element._index;\r\n\tvar datasetIndex = element._datasetIndex;\r\n\tvar controller = element._chart.getDatasetMeta(datasetIndex).controller;\r\n\tvar indexScale = controller._getIndexScale();\r\n\tvar valueScale = controller._getValueScale();\r\n\r\n\treturn {\r\n\t\txLabel: xScale ? xScale.getLabelForIndex(index, datasetIndex) : '',\r\n\t\tyLabel: yScale ? yScale.getLabelForIndex(index, datasetIndex) : '',\r\n\t\tlabel: indexScale ? '' + indexScale.getLabelForIndex(index, datasetIndex) : '',\r\n\t\tvalue: valueScale ? '' + valueScale.getLabelForIndex(index, datasetIndex) : '',\r\n\t\tindex: index,\r\n\t\tdatasetIndex: datasetIndex,\r\n\t\tx: element._model.x,\r\n\t\ty: element._model.y\r\n\t};\r\n}\r\n\r\n/**\r\n * Helper to get the reset model for the tooltip\r\n * @param tooltipOpts {object} the tooltip options\r\n */\r\nfunction getBaseModel(tooltipOpts) {\r\n\tvar globalDefaults = core_defaults.global;\r\n\r\n\treturn {\r\n\t\t// Positioning\r\n\t\txPadding: tooltipOpts.xPadding,\r\n\t\tyPadding: tooltipOpts.yPadding,\r\n\t\txAlign: tooltipOpts.xAlign,\r\n\t\tyAlign: tooltipOpts.yAlign,\r\n\r\n\t\t// Drawing direction and text direction\r\n\t\trtl: tooltipOpts.rtl,\r\n\t\ttextDirection: tooltipOpts.textDirection,\r\n\r\n\t\t// Body\r\n\t\tbodyFontColor: tooltipOpts.bodyFontColor,\r\n\t\t_bodyFontFamily: valueOrDefault$8(tooltipOpts.bodyFontFamily, globalDefaults.defaultFontFamily),\r\n\t\t_bodyFontStyle: valueOrDefault$8(tooltipOpts.bodyFontStyle, globalDefaults.defaultFontStyle),\r\n\t\t_bodyAlign: tooltipOpts.bodyAlign,\r\n\t\tbodyFontSize: valueOrDefault$8(tooltipOpts.bodyFontSize, globalDefaults.defaultFontSize),\r\n\t\tbodySpacing: tooltipOpts.bodySpacing,\r\n\r\n\t\t// Title\r\n\t\ttitleFontColor: tooltipOpts.titleFontColor,\r\n\t\t_titleFontFamily: valueOrDefault$8(tooltipOpts.titleFontFamily, globalDefaults.defaultFontFamily),\r\n\t\t_titleFontStyle: valueOrDefault$8(tooltipOpts.titleFontStyle, globalDefaults.defaultFontStyle),\r\n\t\ttitleFontSize: valueOrDefault$8(tooltipOpts.titleFontSize, globalDefaults.defaultFontSize),\r\n\t\t_titleAlign: tooltipOpts.titleAlign,\r\n\t\ttitleSpacing: tooltipOpts.titleSpacing,\r\n\t\ttitleMarginBottom: tooltipOpts.titleMarginBottom,\r\n\r\n\t\t// Footer\r\n\t\tfooterFontColor: tooltipOpts.footerFontColor,\r\n\t\t_footerFontFamily: valueOrDefault$8(tooltipOpts.footerFontFamily, globalDefaults.defaultFontFamily),\r\n\t\t_footerFontStyle: valueOrDefault$8(tooltipOpts.footerFontStyle, globalDefaults.defaultFontStyle),\r\n\t\tfooterFontSize: valueOrDefault$8(tooltipOpts.footerFontSize, globalDefaults.defaultFontSize),\r\n\t\t_footerAlign: tooltipOpts.footerAlign,\r\n\t\tfooterSpacing: tooltipOpts.footerSpacing,\r\n\t\tfooterMarginTop: tooltipOpts.footerMarginTop,\r\n\r\n\t\t// Appearance\r\n\t\tcaretSize: tooltipOpts.caretSize,\r\n\t\tcornerRadius: tooltipOpts.cornerRadius,\r\n\t\tbackgroundColor: tooltipOpts.backgroundColor,\r\n\t\topacity: 0,\r\n\t\tlegendColorBackground: tooltipOpts.multiKeyBackground,\r\n\t\tdisplayColors: tooltipOpts.displayColors,\r\n\t\tborderColor: tooltipOpts.borderColor,\r\n\t\tborderWidth: tooltipOpts.borderWidth\r\n\t};\r\n}\r\n\r\n/**\r\n * Get the size of the tooltip\r\n */\r\nfunction getTooltipSize(tooltip, model) {\r\n\tvar ctx = tooltip._chart.ctx;\r\n\r\n\tvar height = model.yPadding * 2; // Tooltip Padding\r\n\tvar width = 0;\r\n\r\n\t// Count of all lines in the body\r\n\tvar body = model.body;\r\n\tvar combinedBodyLength = body.reduce(function(count, bodyItem) {\r\n\t\treturn count + bodyItem.before.length + bodyItem.lines.length + bodyItem.after.length;\r\n\t}, 0);\r\n\tcombinedBodyLength += model.beforeBody.length + model.afterBody.length;\r\n\r\n\tvar titleLineCount = model.title.length;\r\n\tvar footerLineCount = model.footer.length;\r\n\tvar titleFontSize = model.titleFontSize;\r\n\tvar bodyFontSize = model.bodyFontSize;\r\n\tvar footerFontSize = model.footerFontSize;\r\n\r\n\theight += titleLineCount * titleFontSize; // Title Lines\r\n\theight += titleLineCount ? (titleLineCount - 1) * model.titleSpacing : 0; // Title Line Spacing\r\n\theight += titleLineCount ? model.titleMarginBottom : 0; // Title's bottom Margin\r\n\theight += combinedBodyLength * bodyFontSize; // Body Lines\r\n\theight += combinedBodyLength ? (combinedBodyLength - 1) * model.bodySpacing : 0; // Body Line Spacing\r\n\theight += footerLineCount ? model.footerMarginTop : 0; // Footer Margin\r\n\theight += footerLineCount * (footerFontSize); // Footer Lines\r\n\theight += footerLineCount ? (footerLineCount - 1) * model.footerSpacing : 0; // Footer Line Spacing\r\n\r\n\t// Title width\r\n\tvar widthPadding = 0;\r\n\tvar maxLineWidth = function(line) {\r\n\t\twidth = Math.max(width, ctx.measureText(line).width + widthPadding);\r\n\t};\r\n\r\n\tctx.font = helpers$1.fontString(titleFontSize, model._titleFontStyle, model._titleFontFamily);\r\n\thelpers$1.each(model.title, maxLineWidth);\r\n\r\n\t// Body width\r\n\tctx.font = helpers$1.fontString(bodyFontSize, model._bodyFontStyle, model._bodyFontFamily);\r\n\thelpers$1.each(model.beforeBody.concat(model.afterBody), maxLineWidth);\r\n\r\n\t// Body lines may include some extra width due to the color box\r\n\twidthPadding = model.displayColors ? (bodyFontSize + 2) : 0;\r\n\thelpers$1.each(body, function(bodyItem) {\r\n\t\thelpers$1.each(bodyItem.before, maxLineWidth);\r\n\t\thelpers$1.each(bodyItem.lines, maxLineWidth);\r\n\t\thelpers$1.each(bodyItem.after, maxLineWidth);\r\n\t});\r\n\r\n\t// Reset back to 0\r\n\twidthPadding = 0;\r\n\r\n\t// Footer width\r\n\tctx.font = helpers$1.fontString(footerFontSize, model._footerFontStyle, model._footerFontFamily);\r\n\thelpers$1.each(model.footer, maxLineWidth);\r\n\r\n\t// Add padding\r\n\twidth += 2 * model.xPadding;\r\n\r\n\treturn {\r\n\t\twidth: width,\r\n\t\theight: height\r\n\t};\r\n}\r\n\r\n/**\r\n * Helper to get the alignment of a tooltip given the size\r\n */\r\nfunction determineAlignment(tooltip, size) {\r\n\tvar model = tooltip._model;\r\n\tvar chart = tooltip._chart;\r\n\tvar chartArea = tooltip._chart.chartArea;\r\n\tvar xAlign = 'center';\r\n\tvar yAlign = 'center';\r\n\r\n\tif (model.y < size.height) {\r\n\t\tyAlign = 'top';\r\n\t} else if (model.y > (chart.height - size.height)) {\r\n\t\tyAlign = 'bottom';\r\n\t}\r\n\r\n\tvar lf, rf; // functions to determine left, right alignment\r\n\tvar olf, orf; // functions to determine if left/right alignment causes tooltip to go outside chart\r\n\tvar yf; // function to get the y alignment if the tooltip goes outside of the left or right edges\r\n\tvar midX = (chartArea.left + chartArea.right) / 2;\r\n\tvar midY = (chartArea.top + chartArea.bottom) / 2;\r\n\r\n\tif (yAlign === 'center') {\r\n\t\tlf = function(x) {\r\n\t\t\treturn x <= midX;\r\n\t\t};\r\n\t\trf = function(x) {\r\n\t\t\treturn x > midX;\r\n\t\t};\r\n\t} else {\r\n\t\tlf = function(x) {\r\n\t\t\treturn x <= (size.width / 2);\r\n\t\t};\r\n\t\trf = function(x) {\r\n\t\t\treturn x >= (chart.width - (size.width / 2));\r\n\t\t};\r\n\t}\r\n\r\n\tolf = function(x) {\r\n\t\treturn x + size.width + model.caretSize + model.caretPadding > chart.width;\r\n\t};\r\n\torf = function(x) {\r\n\t\treturn x - size.width - model.caretSize - model.caretPadding < 0;\r\n\t};\r\n\tyf = function(y) {\r\n\t\treturn y <= midY ? 'top' : 'bottom';\r\n\t};\r\n\r\n\tif (lf(model.x)) {\r\n\t\txAlign = 'left';\r\n\r\n\t\t// Is tooltip too wide and goes over the right side of the chart.?\r\n\t\tif (olf(model.x)) {\r\n\t\t\txAlign = 'center';\r\n\t\t\tyAlign = yf(model.y);\r\n\t\t}\r\n\t} else if (rf(model.x)) {\r\n\t\txAlign = 'right';\r\n\r\n\t\t// Is tooltip too wide and goes outside left edge of canvas?\r\n\t\tif (orf(model.x)) {\r\n\t\t\txAlign = 'center';\r\n\t\t\tyAlign = yf(model.y);\r\n\t\t}\r\n\t}\r\n\r\n\tvar opts = tooltip._options;\r\n\treturn {\r\n\t\txAlign: opts.xAlign ? opts.xAlign : xAlign,\r\n\t\tyAlign: opts.yAlign ? opts.yAlign : yAlign\r\n\t};\r\n}\r\n\r\n/**\r\n * Helper to get the location a tooltip needs to be placed at given the initial position (via the vm) and the size and alignment\r\n */\r\nfunction getBackgroundPoint(vm, size, alignment, chart) {\r\n\t// Background Position\r\n\tvar x = vm.x;\r\n\tvar y = vm.y;\r\n\r\n\tvar caretSize = vm.caretSize;\r\n\tvar caretPadding = vm.caretPadding;\r\n\tvar cornerRadius = vm.cornerRadius;\r\n\tvar xAlign = alignment.xAlign;\r\n\tvar yAlign = alignment.yAlign;\r\n\tvar paddingAndSize = caretSize + caretPadding;\r\n\tvar radiusAndPadding = cornerRadius + caretPadding;\r\n\r\n\tif (xAlign === 'right') {\r\n\t\tx -= size.width;\r\n\t} else if (xAlign === 'center') {\r\n\t\tx -= (size.width / 2);\r\n\t\tif (x + size.width > chart.width) {\r\n\t\t\tx = chart.width - size.width;\r\n\t\t}\r\n\t\tif (x < 0) {\r\n\t\t\tx = 0;\r\n\t\t}\r\n\t}\r\n\r\n\tif (yAlign === 'top') {\r\n\t\ty += paddingAndSize;\r\n\t} else if (yAlign === 'bottom') {\r\n\t\ty -= size.height + paddingAndSize;\r\n\t} else {\r\n\t\ty -= (size.height / 2);\r\n\t}\r\n\r\n\tif (yAlign === 'center') {\r\n\t\tif (xAlign === 'left') {\r\n\t\t\tx += paddingAndSize;\r\n\t\t} else if (xAlign === 'right') {\r\n\t\t\tx -= paddingAndSize;\r\n\t\t}\r\n\t} else if (xAlign === 'left') {\r\n\t\tx -= radiusAndPadding;\r\n\t} else if (xAlign === 'right') {\r\n\t\tx += radiusAndPadding;\r\n\t}\r\n\r\n\treturn {\r\n\t\tx: x,\r\n\t\ty: y\r\n\t};\r\n}\r\n\r\nfunction getAlignedX(vm, align) {\r\n\treturn align === 'center'\r\n\t\t? vm.x + vm.width / 2\r\n\t\t: align === 'right'\r\n\t\t\t? vm.x + vm.width - vm.xPadding\r\n\t\t\t: vm.x + vm.xPadding;\r\n}\r\n\r\n/**\r\n * Helper to build before and after body lines\r\n */\r\nfunction getBeforeAfterBodyLines(callback) {\r\n\treturn pushOrConcat([], splitNewlines(callback));\r\n}\r\n\r\nvar exports$4 = core_element.extend({\r\n\tinitialize: function() {\r\n\t\tthis._model = getBaseModel(this._options);\r\n\t\tthis._lastActive = [];\r\n\t},\r\n\r\n\t// Get the title\r\n\t// Args are: (tooltipItem, data)\r\n\tgetTitle: function() {\r\n\t\tvar me = this;\r\n\t\tvar opts = me._options;\r\n\t\tvar callbacks = opts.callbacks;\r\n\r\n\t\tvar beforeTitle = callbacks.beforeTitle.apply(me, arguments);\r\n\t\tvar title = callbacks.title.apply(me, arguments);\r\n\t\tvar afterTitle = callbacks.afterTitle.apply(me, arguments);\r\n\r\n\t\tvar lines = [];\r\n\t\tlines = pushOrConcat(lines, splitNewlines(beforeTitle));\r\n\t\tlines = pushOrConcat(lines, splitNewlines(title));\r\n\t\tlines = pushOrConcat(lines, splitNewlines(afterTitle));\r\n\r\n\t\treturn lines;\r\n\t},\r\n\r\n\t// Args are: (tooltipItem, data)\r\n\tgetBeforeBody: function() {\r\n\t\treturn getBeforeAfterBodyLines(this._options.callbacks.beforeBody.apply(this, arguments));\r\n\t},\r\n\r\n\t// Args are: (tooltipItem, data)\r\n\tgetBody: function(tooltipItems, data) {\r\n\t\tvar me = this;\r\n\t\tvar callbacks = me._options.callbacks;\r\n\t\tvar bodyItems = [];\r\n\r\n\t\thelpers$1.each(tooltipItems, function(tooltipItem) {\r\n\t\t\tvar bodyItem = {\r\n\t\t\t\tbefore: [],\r\n\t\t\t\tlines: [],\r\n\t\t\t\tafter: []\r\n\t\t\t};\r\n\t\t\tpushOrConcat(bodyItem.before, splitNewlines(callbacks.beforeLabel.call(me, tooltipItem, data)));\r\n\t\t\tpushOrConcat(bodyItem.lines, callbacks.label.call(me, tooltipItem, data));\r\n\t\t\tpushOrConcat(bodyItem.after, splitNewlines(callbacks.afterLabel.call(me, tooltipItem, data)));\r\n\r\n\t\t\tbodyItems.push(bodyItem);\r\n\t\t});\r\n\r\n\t\treturn bodyItems;\r\n\t},\r\n\r\n\t// Args are: (tooltipItem, data)\r\n\tgetAfterBody: function() {\r\n\t\treturn getBeforeAfterBodyLines(this._options.callbacks.afterBody.apply(this, arguments));\r\n\t},\r\n\r\n\t// Get the footer and beforeFooter and afterFooter lines\r\n\t// Args are: (tooltipItem, data)\r\n\tgetFooter: function() {\r\n\t\tvar me = this;\r\n\t\tvar callbacks = me._options.callbacks;\r\n\r\n\t\tvar beforeFooter = callbacks.beforeFooter.apply(me, arguments);\r\n\t\tvar footer = callbacks.footer.apply(me, arguments);\r\n\t\tvar afterFooter = callbacks.afterFooter.apply(me, arguments);\r\n\r\n\t\tvar lines = [];\r\n\t\tlines = pushOrConcat(lines, splitNewlines(beforeFooter));\r\n\t\tlines = pushOrConcat(lines, splitNewlines(footer));\r\n\t\tlines = pushOrConcat(lines, splitNewlines(afterFooter));\r\n\r\n\t\treturn lines;\r\n\t},\r\n\r\n\tupdate: function(changed) {\r\n\t\tvar me = this;\r\n\t\tvar opts = me._options;\r\n\r\n\t\t// Need to regenerate the model because its faster than using extend and it is necessary due to the optimization in Chart.Element.transition\r\n\t\t// that does _view = _model if ease === 1. This causes the 2nd tooltip update to set properties in both the view and model at the same time\r\n\t\t// which breaks any animations.\r\n\t\tvar existingModel = me._model;\r\n\t\tvar model = me._model = getBaseModel(opts);\r\n\t\tvar active = me._active;\r\n\r\n\t\tvar data = me._data;\r\n\r\n\t\t// In the case where active.length === 0 we need to keep these at existing values for good animations\r\n\t\tvar alignment = {\r\n\t\t\txAlign: existingModel.xAlign,\r\n\t\t\tyAlign: existingModel.yAlign\r\n\t\t};\r\n\t\tvar backgroundPoint = {\r\n\t\t\tx: existingModel.x,\r\n\t\t\ty: existingModel.y\r\n\t\t};\r\n\t\tvar tooltipSize = {\r\n\t\t\twidth: existingModel.width,\r\n\t\t\theight: existingModel.height\r\n\t\t};\r\n\t\tvar tooltipPosition = {\r\n\t\t\tx: existingModel.caretX,\r\n\t\t\ty: existingModel.caretY\r\n\t\t};\r\n\r\n\t\tvar i, len;\r\n\r\n\t\tif (active.length) {\r\n\t\t\tmodel.opacity = 1;\r\n\r\n\t\t\tvar labelColors = [];\r\n\t\t\tvar labelTextColors = [];\r\n\t\t\ttooltipPosition = positioners[opts.position].call(me, active, me._eventPosition);\r\n\r\n\t\t\tvar tooltipItems = [];\r\n\t\t\tfor (i = 0, len = active.length; i < len; ++i) {\r\n\t\t\t\ttooltipItems.push(createTooltipItem(active[i]));\r\n\t\t\t}\r\n\r\n\t\t\t// If the user provided a filter function, use it to modify the tooltip items\r\n\t\t\tif (opts.filter) {\r\n\t\t\t\ttooltipItems = tooltipItems.filter(function(a) {\r\n\t\t\t\t\treturn opts.filter(a, data);\r\n\t\t\t\t});\r\n\t\t\t}\r\n\r\n\t\t\t// If the user provided a sorting function, use it to modify the tooltip items\r\n\t\t\tif (opts.itemSort) {\r\n\t\t\t\ttooltipItems = tooltipItems.sort(function(a, b) {\r\n\t\t\t\t\treturn opts.itemSort(a, b, data);\r\n\t\t\t\t});\r\n\t\t\t}\r\n\r\n\t\t\t// Determine colors for boxes\r\n\t\t\thelpers$1.each(tooltipItems, function(tooltipItem) {\r\n\t\t\t\tlabelColors.push(opts.callbacks.labelColor.call(me, tooltipItem, me._chart));\r\n\t\t\t\tlabelTextColors.push(opts.callbacks.labelTextColor.call(me, tooltipItem, me._chart));\r\n\t\t\t});\r\n\r\n\r\n\t\t\t// Build the Text Lines\r\n\t\t\tmodel.title = me.getTitle(tooltipItems, data);\r\n\t\t\tmodel.beforeBody = me.getBeforeBody(tooltipItems, data);\r\n\t\t\tmodel.body = me.getBody(tooltipItems, data);\r\n\t\t\tmodel.afterBody = me.getAfterBody(tooltipItems, data);\r\n\t\t\tmodel.footer = me.getFooter(tooltipItems, data);\r\n\r\n\t\t\t// Initial positioning and colors\r\n\t\t\tmodel.x = tooltipPosition.x;\r\n\t\t\tmodel.y = tooltipPosition.y;\r\n\t\t\tmodel.caretPadding = opts.caretPadding;\r\n\t\t\tmodel.labelColors = labelColors;\r\n\t\t\tmodel.labelTextColors = labelTextColors;\r\n\r\n\t\t\t// data points\r\n\t\t\tmodel.dataPoints = tooltipItems;\r\n\r\n\t\t\t// We need to determine alignment of the tooltip\r\n\t\t\ttooltipSize = getTooltipSize(this, model);\r\n\t\t\talignment = determineAlignment(this, tooltipSize);\r\n\t\t\t// Final Size and Position\r\n\t\t\tbackgroundPoint = getBackgroundPoint(model, tooltipSize, alignment, me._chart);\r\n\t\t} else {\r\n\t\t\tmodel.opacity = 0;\r\n\t\t}\r\n\r\n\t\tmodel.xAlign = alignment.xAlign;\r\n\t\tmodel.yAlign = alignment.yAlign;\r\n\t\tmodel.x = backgroundPoint.x;\r\n\t\tmodel.y = backgroundPoint.y;\r\n\t\tmodel.width = tooltipSize.width;\r\n\t\tmodel.height = tooltipSize.height;\r\n\r\n\t\t// Point where the caret on the tooltip points to\r\n\t\tmodel.caretX = tooltipPosition.x;\r\n\t\tmodel.caretY = tooltipPosition.y;\r\n\r\n\t\tme._model = model;\r\n\r\n\t\tif (changed && opts.custom) {\r\n\t\t\topts.custom.call(me, model);\r\n\t\t}\r\n\r\n\t\treturn me;\r\n\t},\r\n\r\n\tdrawCaret: function(tooltipPoint, size) {\r\n\t\tvar ctx = this._chart.ctx;\r\n\t\tvar vm = this._view;\r\n\t\tvar caretPosition = this.getCaretPosition(tooltipPoint, size, vm);\r\n\r\n\t\tctx.lineTo(caretPosition.x1, caretPosition.y1);\r\n\t\tctx.lineTo(caretPosition.x2, caretPosition.y2);\r\n\t\tctx.lineTo(caretPosition.x3, caretPosition.y3);\r\n\t},\r\n\tgetCaretPosition: function(tooltipPoint, size, vm) {\r\n\t\tvar x1, x2, x3, y1, y2, y3;\r\n\t\tvar caretSize = vm.caretSize;\r\n\t\tvar cornerRadius = vm.cornerRadius;\r\n\t\tvar xAlign = vm.xAlign;\r\n\t\tvar yAlign = vm.yAlign;\r\n\t\tvar ptX = tooltipPoint.x;\r\n\t\tvar ptY = tooltipPoint.y;\r\n\t\tvar width = size.width;\r\n\t\tvar height = size.height;\r\n\r\n\t\tif (yAlign === 'center') {\r\n\t\t\ty2 = ptY + (height / 2);\r\n\r\n\t\t\tif (xAlign === 'left') {\r\n\t\t\t\tx1 = ptX;\r\n\t\t\t\tx2 = x1 - caretSize;\r\n\t\t\t\tx3 = x1;\r\n\r\n\t\t\t\ty1 = y2 + caretSize;\r\n\t\t\t\ty3 = y2 - caretSize;\r\n\t\t\t} else {\r\n\t\t\t\tx1 = ptX + width;\r\n\t\t\t\tx2 = x1 + caretSize;\r\n\t\t\t\tx3 = x1;\r\n\r\n\t\t\t\ty1 = y2 - caretSize;\r\n\t\t\t\ty3 = y2 + caretSize;\r\n\t\t\t}\r\n\t\t} else {\r\n\t\t\tif (xAlign === 'left') {\r\n\t\t\t\tx2 = ptX + cornerRadius + (caretSize);\r\n\t\t\t\tx1 = x2 - caretSize;\r\n\t\t\t\tx3 = x2 + caretSize;\r\n\t\t\t} else if (xAlign === 'right') {\r\n\t\t\t\tx2 = ptX + width - cornerRadius - caretSize;\r\n\t\t\t\tx1 = x2 - caretSize;\r\n\t\t\t\tx3 = x2 + caretSize;\r\n\t\t\t} else {\r\n\t\t\t\tx2 = vm.caretX;\r\n\t\t\t\tx1 = x2 - caretSize;\r\n\t\t\t\tx3 = x2 + caretSize;\r\n\t\t\t}\r\n\t\t\tif (yAlign === 'top') {\r\n\t\t\t\ty1 = ptY;\r\n\t\t\t\ty2 = y1 - caretSize;\r\n\t\t\t\ty3 = y1;\r\n\t\t\t} else {\r\n\t\t\t\ty1 = ptY + height;\r\n\t\t\t\ty2 = y1 + caretSize;\r\n\t\t\t\ty3 = y1;\r\n\t\t\t\t// invert drawing order\r\n\t\t\t\tvar tmp = x3;\r\n\t\t\t\tx3 = x1;\r\n\t\t\t\tx1 = tmp;\r\n\t\t\t}\r\n\t\t}\r\n\t\treturn {x1: x1, x2: x2, x3: x3, y1: y1, y2: y2, y3: y3};\r\n\t},\r\n\r\n\tdrawTitle: function(pt, vm, ctx) {\r\n\t\tvar title = vm.title;\r\n\t\tvar length = title.length;\r\n\t\tvar titleFontSize, titleSpacing, i;\r\n\r\n\t\tif (length) {\r\n\t\t\tvar rtlHelper = getRtlHelper(vm.rtl, vm.x, vm.width);\r\n\r\n\t\t\tpt.x = getAlignedX(vm, vm._titleAlign);\r\n\r\n\t\t\tctx.textAlign = rtlHelper.textAlign(vm._titleAlign);\r\n\t\t\tctx.textBaseline = 'middle';\r\n\r\n\t\t\ttitleFontSize = vm.titleFontSize;\r\n\t\t\ttitleSpacing = vm.titleSpacing;\r\n\r\n\t\t\tctx.fillStyle = vm.titleFontColor;\r\n\t\t\tctx.font = helpers$1.fontString(titleFontSize, vm._titleFontStyle, vm._titleFontFamily);\r\n\r\n\t\t\tfor (i = 0; i < length; ++i) {\r\n\t\t\t\tctx.fillText(title[i], rtlHelper.x(pt.x), pt.y + titleFontSize / 2);\r\n\t\t\t\tpt.y += titleFontSize + titleSpacing; // Line Height and spacing\r\n\r\n\t\t\t\tif (i + 1 === length) {\r\n\t\t\t\t\tpt.y += vm.titleMarginBottom - titleSpacing; // If Last, add margin, remove spacing\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t}\r\n\t},\r\n\r\n\tdrawBody: function(pt, vm, ctx) {\r\n\t\tvar bodyFontSize = vm.bodyFontSize;\r\n\t\tvar bodySpacing = vm.bodySpacing;\r\n\t\tvar bodyAlign = vm._bodyAlign;\r\n\t\tvar body = vm.body;\r\n\t\tvar drawColorBoxes = vm.displayColors;\r\n\t\tvar xLinePadding = 0;\r\n\t\tvar colorX = drawColorBoxes ? getAlignedX(vm, 'left') : 0;\r\n\r\n\t\tvar rtlHelper = getRtlHelper(vm.rtl, vm.x, vm.width);\r\n\r\n\t\tvar fillLineOfText = function(line) {\r\n\t\t\tctx.fillText(line, rtlHelper.x(pt.x + xLinePadding), pt.y + bodyFontSize / 2);\r\n\t\t\tpt.y += bodyFontSize + bodySpacing;\r\n\t\t};\r\n\r\n\t\tvar bodyItem, textColor, labelColors, lines, i, j, ilen, jlen;\r\n\t\tvar bodyAlignForCalculation = rtlHelper.textAlign(bodyAlign);\r\n\r\n\t\tctx.textAlign = bodyAlign;\r\n\t\tctx.textBaseline = 'middle';\r\n\t\tctx.font = helpers$1.fontString(bodyFontSize, vm._bodyFontStyle, vm._bodyFontFamily);\r\n\r\n\t\tpt.x = getAlignedX(vm, bodyAlignForCalculation);\r\n\r\n\t\t// Before body lines\r\n\t\tctx.fillStyle = vm.bodyFontColor;\r\n\t\thelpers$1.each(vm.beforeBody, fillLineOfText);\r\n\r\n\t\txLinePadding = drawColorBoxes && bodyAlignForCalculation !== 'right'\r\n\t\t\t? bodyAlign === 'center' ? (bodyFontSize / 2 + 1) : (bodyFontSize + 2)\r\n\t\t\t: 0;\r\n\r\n\t\t// Draw body lines now\r\n\t\tfor (i = 0, ilen = body.length; i < ilen; ++i) {\r\n\t\t\tbodyItem = body[i];\r\n\t\t\ttextColor = vm.labelTextColors[i];\r\n\t\t\tlabelColors = vm.labelColors[i];\r\n\r\n\t\t\tctx.fillStyle = textColor;\r\n\t\t\thelpers$1.each(bodyItem.before, fillLineOfText);\r\n\r\n\t\t\tlines = bodyItem.lines;\r\n\t\t\tfor (j = 0, jlen = lines.length; j < jlen; ++j) {\r\n\t\t\t\t// Draw Legend-like boxes if needed\r\n\t\t\t\tif (drawColorBoxes) {\r\n\t\t\t\t\tvar rtlColorX = rtlHelper.x(colorX);\r\n\r\n\t\t\t\t\t// Fill a white rect so that colours merge nicely if the opacity is < 1\r\n\t\t\t\t\tctx.fillStyle = vm.legendColorBackground;\r\n\t\t\t\t\tctx.fillRect(rtlHelper.leftForLtr(rtlColorX, bodyFontSize), pt.y, bodyFontSize, bodyFontSize);\r\n\r\n\t\t\t\t\t// Border\r\n\t\t\t\t\tctx.lineWidth = 1;\r\n\t\t\t\t\tctx.strokeStyle = labelColors.borderColor;\r\n\t\t\t\t\tctx.strokeRect(rtlHelper.leftForLtr(rtlColorX, bodyFontSize), pt.y, bodyFontSize, bodyFontSize);\r\n\r\n\t\t\t\t\t// Inner square\r\n\t\t\t\t\tctx.fillStyle = labelColors.backgroundColor;\r\n\t\t\t\t\tctx.fillRect(rtlHelper.leftForLtr(rtlHelper.xPlus(rtlColorX, 1), bodyFontSize - 2), pt.y + 1, bodyFontSize - 2, bodyFontSize - 2);\r\n\t\t\t\t\tctx.fillStyle = textColor;\r\n\t\t\t\t}\r\n\r\n\t\t\t\tfillLineOfText(lines[j]);\r\n\t\t\t}\r\n\r\n\t\t\thelpers$1.each(bodyItem.after, fillLineOfText);\r\n\t\t}\r\n\r\n\t\t// Reset back to 0 for after body\r\n\t\txLinePadding = 0;\r\n\r\n\t\t// After body lines\r\n\t\thelpers$1.each(vm.afterBody, fillLineOfText);\r\n\t\tpt.y -= bodySpacing; // Remove last body spacing\r\n\t},\r\n\r\n\tdrawFooter: function(pt, vm, ctx) {\r\n\t\tvar footer = vm.footer;\r\n\t\tvar length = footer.length;\r\n\t\tvar footerFontSize, i;\r\n\r\n\t\tif (length) {\r\n\t\t\tvar rtlHelper = getRtlHelper(vm.rtl, vm.x, vm.width);\r\n\r\n\t\t\tpt.x = getAlignedX(vm, vm._footerAlign);\r\n\t\t\tpt.y += vm.footerMarginTop;\r\n\r\n\t\t\tctx.textAlign = rtlHelper.textAlign(vm._footerAlign);\r\n\t\t\tctx.textBaseline = 'middle';\r\n\r\n\t\t\tfooterFontSize = vm.footerFontSize;\r\n\r\n\t\t\tctx.fillStyle = vm.footerFontColor;\r\n\t\t\tctx.font = helpers$1.fontString(footerFontSize, vm._footerFontStyle, vm._footerFontFamily);\r\n\r\n\t\t\tfor (i = 0; i < length; ++i) {\r\n\t\t\t\tctx.fillText(footer[i], rtlHelper.x(pt.x), pt.y + footerFontSize / 2);\r\n\t\t\t\tpt.y += footerFontSize + vm.footerSpacing;\r\n\t\t\t}\r\n\t\t}\r\n\t},\r\n\r\n\tdrawBackground: function(pt, vm, ctx, tooltipSize) {\r\n\t\tctx.fillStyle = vm.backgroundColor;\r\n\t\tctx.strokeStyle = vm.borderColor;\r\n\t\tctx.lineWidth = vm.borderWidth;\r\n\t\tvar xAlign = vm.xAlign;\r\n\t\tvar yAlign = vm.yAlign;\r\n\t\tvar x = pt.x;\r\n\t\tvar y = pt.y;\r\n\t\tvar width = tooltipSize.width;\r\n\t\tvar height = tooltipSize.height;\r\n\t\tvar radius = vm.cornerRadius;\r\n\r\n\t\tctx.beginPath();\r\n\t\tctx.moveTo(x + radius, y);\r\n\t\tif (yAlign === 'top') {\r\n\t\t\tthis.drawCaret(pt, tooltipSize);\r\n\t\t}\r\n\t\tctx.lineTo(x + width - radius, y);\r\n\t\tctx.quadraticCurveTo(x + width, y, x + width, y + radius);\r\n\t\tif (yAlign === 'center' && xAlign === 'right') {\r\n\t\t\tthis.drawCaret(pt, tooltipSize);\r\n\t\t}\r\n\t\tctx.lineTo(x + width, y + height - radius);\r\n\t\tctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);\r\n\t\tif (yAlign === 'bottom') {\r\n\t\t\tthis.drawCaret(pt, tooltipSize);\r\n\t\t}\r\n\t\tctx.lineTo(x + radius, y + height);\r\n\t\tctx.quadraticCurveTo(x, y + height, x, y + height - radius);\r\n\t\tif (yAlign === 'center' && xAlign === 'left') {\r\n\t\t\tthis.drawCaret(pt, tooltipSize);\r\n\t\t}\r\n\t\tctx.lineTo(x, y + radius);\r\n\t\tctx.quadraticCurveTo(x, y, x + radius, y);\r\n\t\tctx.closePath();\r\n\r\n\t\tctx.fill();\r\n\r\n\t\tif (vm.borderWidth > 0) {\r\n\t\t\tctx.stroke();\r\n\t\t}\r\n\t},\r\n\r\n\tdraw: function() {\r\n\t\tvar ctx = this._chart.ctx;\r\n\t\tvar vm = this._view;\r\n\r\n\t\tif (vm.opacity === 0) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tvar tooltipSize = {\r\n\t\t\twidth: vm.width,\r\n\t\t\theight: vm.height\r\n\t\t};\r\n\t\tvar pt = {\r\n\t\t\tx: vm.x,\r\n\t\t\ty: vm.y\r\n\t\t};\r\n\r\n\t\t// IE11/Edge does not like very small opacities, so snap to 0\r\n\t\tvar opacity = Math.abs(vm.opacity < 1e-3) ? 0 : vm.opacity;\r\n\r\n\t\t// Truthy/falsey value for empty tooltip\r\n\t\tvar hasTooltipContent = vm.title.length || vm.beforeBody.length || vm.body.length || vm.afterBody.length || vm.footer.length;\r\n\r\n\t\tif (this._options.enabled && hasTooltipContent) {\r\n\t\t\tctx.save();\r\n\t\t\tctx.globalAlpha = opacity;\r\n\r\n\t\t\t// Draw Background\r\n\t\t\tthis.drawBackground(pt, vm, ctx, tooltipSize);\r\n\r\n\t\t\t// Draw Title, Body, and Footer\r\n\t\t\tpt.y += vm.yPadding;\r\n\r\n\t\t\thelpers$1.rtl.overrideTextDirection(ctx, vm.textDirection);\r\n\r\n\t\t\t// Titles\r\n\t\t\tthis.drawTitle(pt, vm, ctx);\r\n\r\n\t\t\t// Body\r\n\t\t\tthis.drawBody(pt, vm, ctx);\r\n\r\n\t\t\t// Footer\r\n\t\t\tthis.drawFooter(pt, vm, ctx);\r\n\r\n\t\t\thelpers$1.rtl.restoreTextDirection(ctx, vm.textDirection);\r\n\r\n\t\t\tctx.restore();\r\n\t\t}\r\n\t},\r\n\r\n\t/**\r\n\t * Handle an event\r\n\t * @private\r\n\t * @param {IEvent} event - The event to handle\r\n\t * @returns {boolean} true if the tooltip changed\r\n\t */\r\n\thandleEvent: function(e) {\r\n\t\tvar me = this;\r\n\t\tvar options = me._options;\r\n\t\tvar changed = false;\r\n\r\n\t\tme._lastActive = me._lastActive || [];\r\n\r\n\t\t// Find Active Elements for tooltips\r\n\t\tif (e.type === 'mouseout') {\r\n\t\t\tme._active = [];\r\n\t\t} else {\r\n\t\t\tme._active = me._chart.getElementsAtEventForMode(e, options.mode, options);\r\n\t\t\tif (options.reverse) {\r\n\t\t\t\tme._active.reverse();\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\t// Remember Last Actives\r\n\t\tchanged = !helpers$1.arrayEquals(me._active, me._lastActive);\r\n\r\n\t\t// Only handle target event on tooltip change\r\n\t\tif (changed) {\r\n\t\t\tme._lastActive = me._active;\r\n\r\n\t\t\tif (options.enabled || options.custom) {\r\n\t\t\t\tme._eventPosition = {\r\n\t\t\t\t\tx: e.x,\r\n\t\t\t\t\ty: e.y\r\n\t\t\t\t};\r\n\r\n\t\t\t\tme.update(true);\r\n\t\t\t\tme.pivot();\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\treturn changed;\r\n\t}\r\n});\r\n\r\n/**\r\n * @namespace Chart.Tooltip.positioners\r\n */\r\nvar positioners_1 = positioners;\r\n\r\nvar core_tooltip = exports$4;\ncore_tooltip.positioners = positioners_1;\n\nvar valueOrDefault$9 = helpers$1.valueOrDefault;\r\n\r\ncore_defaults._set('global', {\r\n\telements: {},\r\n\tevents: [\r\n\t\t'mousemove',\r\n\t\t'mouseout',\r\n\t\t'click',\r\n\t\t'touchstart',\r\n\t\t'touchmove'\r\n\t],\r\n\thover: {\r\n\t\tonHover: null,\r\n\t\tmode: 'nearest',\r\n\t\tintersect: true,\r\n\t\tanimationDuration: 400\r\n\t},\r\n\tonClick: null,\r\n\tmaintainAspectRatio: true,\r\n\tresponsive: true,\r\n\tresponsiveAnimationDuration: 0\r\n});\r\n\r\n/**\r\n * Recursively merge the given config objects representing the `scales` option\r\n * by incorporating scale defaults in `xAxes` and `yAxes` array items, then\r\n * returns a deep copy of the result, thus doesn't alter inputs.\r\n */\r\nfunction mergeScaleConfig(/* config objects ... */) {\r\n\treturn helpers$1.merge(Object.create(null), [].slice.call(arguments), {\r\n\t\tmerger: function(key, target, source, options) {\r\n\t\t\tif (key === 'xAxes' || key === 'yAxes') {\r\n\t\t\t\tvar slen = source[key].length;\r\n\t\t\t\tvar i, type, scale;\r\n\r\n\t\t\t\tif (!target[key]) {\r\n\t\t\t\t\ttarget[key] = [];\r\n\t\t\t\t}\r\n\r\n\t\t\t\tfor (i = 0; i < slen; ++i) {\r\n\t\t\t\t\tscale = source[key][i];\r\n\t\t\t\t\ttype = valueOrDefault$9(scale.type, key === 'xAxes' ? 'category' : 'linear');\r\n\r\n\t\t\t\t\tif (i >= target[key].length) {\r\n\t\t\t\t\t\ttarget[key].push({});\r\n\t\t\t\t\t}\r\n\r\n\t\t\t\t\tif (!target[key][i].type || (scale.type && scale.type !== target[key][i].type)) {\r\n\t\t\t\t\t\t// new/untyped scale or type changed: let's apply the new defaults\r\n\t\t\t\t\t\t// then merge source scale to correctly overwrite the defaults.\r\n\t\t\t\t\t\thelpers$1.merge(target[key][i], [core_scaleService.getScaleDefaults(type), scale]);\r\n\t\t\t\t\t} else {\r\n\t\t\t\t\t\t// scales type are the same\r\n\t\t\t\t\t\thelpers$1.merge(target[key][i], scale);\r\n\t\t\t\t\t}\r\n\t\t\t\t}\r\n\t\t\t} else {\r\n\t\t\t\thelpers$1._merger(key, target, source, options);\r\n\t\t\t}\r\n\t\t}\r\n\t});\r\n}\r\n\r\n/**\r\n * Recursively merge the given config objects as the root options by handling\r\n * default scale options for the `scales` and `scale` properties, then returns\r\n * a deep copy of the result, thus doesn't alter inputs.\r\n */\r\nfunction mergeConfig(/* config objects ... */) {\r\n\treturn helpers$1.merge(Object.create(null), [].slice.call(arguments), {\r\n\t\tmerger: function(key, target, source, options) {\r\n\t\t\tvar tval = target[key] || Object.create(null);\r\n\t\t\tvar sval = source[key];\r\n\r\n\t\t\tif (key === 'scales') {\r\n\t\t\t\t// scale config merging is complex. Add our own function here for that\r\n\t\t\t\ttarget[key] = mergeScaleConfig(tval, sval);\r\n\t\t\t} else if (key === 'scale') {\r\n\t\t\t\t// used in polar area & radar charts since there is only one scale\r\n\t\t\t\ttarget[key] = helpers$1.merge(tval, [core_scaleService.getScaleDefaults(sval.type), sval]);\r\n\t\t\t} else {\r\n\t\t\t\thelpers$1._merger(key, target, source, options);\r\n\t\t\t}\r\n\t\t}\r\n\t});\r\n}\r\n\r\nfunction initConfig(config) {\r\n\tconfig = config || Object.create(null);\r\n\r\n\t// Do NOT use mergeConfig for the data object because this method merges arrays\r\n\t// and so would change references to labels and datasets, preventing data updates.\r\n\tvar data = config.data = config.data || {};\r\n\tdata.datasets = data.datasets || [];\r\n\tdata.labels = data.labels || [];\r\n\r\n\tconfig.options = mergeConfig(\r\n\t\tcore_defaults.global,\r\n\t\tcore_defaults[config.type],\r\n\t\tconfig.options || {});\r\n\r\n\treturn config;\r\n}\r\n\r\nfunction updateConfig(chart) {\r\n\tvar newOptions = chart.options;\r\n\r\n\thelpers$1.each(chart.scales, function(scale) {\r\n\t\tcore_layouts.removeBox(chart, scale);\r\n\t});\r\n\r\n\tnewOptions = mergeConfig(\r\n\t\tcore_defaults.global,\r\n\t\tcore_defaults[chart.config.type],\r\n\t\tnewOptions);\r\n\r\n\tchart.options = chart.config.options = newOptions;\r\n\tchart.ensureScalesHaveIDs();\r\n\tchart.buildOrUpdateScales();\r\n\r\n\t// Tooltip\r\n\tchart.tooltip._options = newOptions.tooltips;\r\n\tchart.tooltip.initialize();\r\n}\r\n\r\nfunction nextAvailableScaleId(axesOpts, prefix, index) {\r\n\tvar id;\r\n\tvar hasId = function(obj) {\r\n\t\treturn obj.id === id;\r\n\t};\r\n\r\n\tdo {\r\n\t\tid = prefix + index++;\r\n\t} while (helpers$1.findIndex(axesOpts, hasId) >= 0);\r\n\r\n\treturn id;\r\n}\r\n\r\nfunction positionIsHorizontal(position) {\r\n\treturn position === 'top' || position === 'bottom';\r\n}\r\n\r\nfunction compare2Level(l1, l2) {\r\n\treturn function(a, b) {\r\n\t\treturn a[l1] === b[l1]\r\n\t\t\t? a[l2] - b[l2]\r\n\t\t\t: a[l1] - b[l1];\r\n\t};\r\n}\r\n\r\nvar Chart = function(item, config) {\r\n\tthis.construct(item, config);\r\n\treturn this;\r\n};\r\n\r\nhelpers$1.extend(Chart.prototype, /** @lends Chart */ {\r\n\t/**\r\n\t * @private\r\n\t */\r\n\tconstruct: function(item, config) {\r\n\t\tvar me = this;\r\n\r\n\t\tconfig = initConfig(config);\r\n\r\n\t\tvar context = platform.acquireContext(item, config);\r\n\t\tvar canvas = context && context.canvas;\r\n\t\tvar height = canvas && canvas.height;\r\n\t\tvar width = canvas && canvas.width;\r\n\r\n\t\tme.id = helpers$1.uid();\r\n\t\tme.ctx = context;\r\n\t\tme.canvas = canvas;\r\n\t\tme.config = config;\r\n\t\tme.width = width;\r\n\t\tme.height = height;\r\n\t\tme.aspectRatio = height ? width / height : null;\r\n\t\tme.options = config.options;\r\n\t\tme._bufferedRender = false;\r\n\t\tme._layers = [];\r\n\r\n\t\t/**\r\n\t\t * Provided for backward compatibility, Chart and Chart.Controller have been merged,\r\n\t\t * the \"instance\" still need to be defined since it might be called from plugins.\r\n\t\t * @prop Chart#chart\r\n\t\t * @deprecated since version 2.6.0\r\n\t\t * @todo remove at version 3\r\n\t\t * @private\r\n\t\t */\r\n\t\tme.chart = me;\r\n\t\tme.controller = me; // chart.chart.controller #inception\r\n\r\n\t\t// Add the chart instance to the global namespace\r\n\t\tChart.instances[me.id] = me;\r\n\r\n\t\t// Define alias to the config data: `chart.data === chart.config.data`\r\n\t\tObject.defineProperty(me, 'data', {\r\n\t\t\tget: function() {\r\n\t\t\t\treturn me.config.data;\r\n\t\t\t},\r\n\t\t\tset: function(value) {\r\n\t\t\t\tme.config.data = value;\r\n\t\t\t}\r\n\t\t});\r\n\r\n\t\tif (!context || !canvas) {\r\n\t\t\t// The given item is not a compatible context2d element, let's return before finalizing\r\n\t\t\t// the chart initialization but after setting basic chart / controller properties that\r\n\t\t\t// can help to figure out that the chart is not valid (e.g chart.canvas !== null);\r\n\t\t\t// https://github.com/chartjs/Chart.js/issues/2807\r\n\t\t\tconsole.error(\"Failed to create chart: can't acquire context from the given item\");\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tme.initialize();\r\n\t\tme.update();\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\tinitialize: function() {\r\n\t\tvar me = this;\r\n\r\n\t\t// Before init plugin notification\r\n\t\tcore_plugins.notify(me, 'beforeInit');\r\n\r\n\t\thelpers$1.retinaScale(me, me.options.devicePixelRatio);\r\n\r\n\t\tme.bindEvents();\r\n\r\n\t\tif (me.options.responsive) {\r\n\t\t\t// Initial resize before chart draws (must be silent to preserve initial animations).\r\n\t\t\tme.resize(true);\r\n\t\t}\r\n\r\n\t\tme.initToolTip();\r\n\r\n\t\t// After init plugin notification\r\n\t\tcore_plugins.notify(me, 'afterInit');\r\n\r\n\t\treturn me;\r\n\t},\r\n\r\n\tclear: function() {\r\n\t\thelpers$1.canvas.clear(this);\r\n\t\treturn this;\r\n\t},\r\n\r\n\tstop: function() {\r\n\t\t// Stops any current animation loop occurring\r\n\t\tcore_animations.cancelAnimation(this);\r\n\t\treturn this;\r\n\t},\r\n\r\n\tresize: function(silent) {\r\n\t\tvar me = this;\r\n\t\tvar options = me.options;\r\n\t\tvar canvas = me.canvas;\r\n\t\tvar aspectRatio = (options.maintainAspectRatio && me.aspectRatio) || null;\r\n\r\n\t\t// the canvas render width and height will be casted to integers so make sure that\r\n\t\t// the canvas display style uses the same integer values to avoid blurring effect.\r\n\r\n\t\t// Set to 0 instead of canvas.size because the size defaults to 300x150 if the element is collapsed\r\n\t\tvar newWidth = Math.max(0, Math.floor(helpers$1.getMaximumWidth(canvas)));\r\n\t\tvar newHeight = Math.max(0, Math.floor(aspectRatio ? newWidth / aspectRatio : helpers$1.getMaximumHeight(canvas)));\r\n\r\n\t\tif (me.width === newWidth && me.height === newHeight) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tcanvas.width = me.width = newWidth;\r\n\t\tcanvas.height = me.height = newHeight;\r\n\t\tcanvas.style.width = newWidth + 'px';\r\n\t\tcanvas.style.height = newHeight + 'px';\r\n\r\n\t\thelpers$1.retinaScale(me, options.devicePixelRatio);\r\n\r\n\t\tif (!silent) {\r\n\t\t\t// Notify any plugins about the resize\r\n\t\t\tvar newSize = {width: newWidth, height: newHeight};\r\n\t\t\tcore_plugins.notify(me, 'resize', [newSize]);\r\n\r\n\t\t\t// Notify of resize\r\n\t\t\tif (options.onResize) {\r\n\t\t\t\toptions.onResize(me, newSize);\r\n\t\t\t}\r\n\r\n\t\t\tme.stop();\r\n\t\t\tme.update({\r\n\t\t\t\tduration: options.responsiveAnimationDuration\r\n\t\t\t});\r\n\t\t}\r\n\t},\r\n\r\n\tensureScalesHaveIDs: function() {\r\n\t\tvar options = this.options;\r\n\t\tvar scalesOptions = options.scales || {};\r\n\t\tvar scaleOptions = options.scale;\r\n\r\n\t\thelpers$1.each(scalesOptions.xAxes, function(xAxisOptions, index) {\r\n\t\t\tif (!xAxisOptions.id) {\r\n\t\t\t\txAxisOptions.id = nextAvailableScaleId(scalesOptions.xAxes, 'x-axis-', index);\r\n\t\t\t}\r\n\t\t});\r\n\r\n\t\thelpers$1.each(scalesOptions.yAxes, function(yAxisOptions, index) {\r\n\t\t\tif (!yAxisOptions.id) {\r\n\t\t\t\tyAxisOptions.id = nextAvailableScaleId(scalesOptions.yAxes, 'y-axis-', index);\r\n\t\t\t}\r\n\t\t});\r\n\r\n\t\tif (scaleOptions) {\r\n\t\t\tscaleOptions.id = scaleOptions.id || 'scale';\r\n\t\t}\r\n\t},\r\n\r\n\t/**\r\n\t * Builds a map of scale ID to scale object for future lookup.\r\n\t */\r\n\tbuildOrUpdateScales: function() {\r\n\t\tvar me = this;\r\n\t\tvar options = me.options;\r\n\t\tvar scales = me.scales || {};\r\n\t\tvar items = [];\r\n\t\tvar updated = Object.keys(scales).reduce(function(obj, id) {\r\n\t\t\tobj[id] = false;\r\n\t\t\treturn obj;\r\n\t\t}, {});\r\n\r\n\t\tif (options.scales) {\r\n\t\t\titems = items.concat(\r\n\t\t\t\t(options.scales.xAxes || []).map(function(xAxisOptions) {\r\n\t\t\t\t\treturn {options: xAxisOptions, dtype: 'category', dposition: 'bottom'};\r\n\t\t\t\t}),\r\n\t\t\t\t(options.scales.yAxes || []).map(function(yAxisOptions) {\r\n\t\t\t\t\treturn {options: yAxisOptions, dtype: 'linear', dposition: 'left'};\r\n\t\t\t\t})\r\n\t\t\t);\r\n\t\t}\r\n\r\n\t\tif (options.scale) {\r\n\t\t\titems.push({\r\n\t\t\t\toptions: options.scale,\r\n\t\t\t\tdtype: 'radialLinear',\r\n\t\t\t\tisDefault: true,\r\n\t\t\t\tdposition: 'chartArea'\r\n\t\t\t});\r\n\t\t}\r\n\r\n\t\thelpers$1.each(items, function(item) {\r\n\t\t\tvar scaleOptions = item.options;\r\n\t\t\tvar id = scaleOptions.id;\r\n\t\t\tvar scaleType = valueOrDefault$9(scaleOptions.type, item.dtype);\r\n\r\n\t\t\tif (positionIsHorizontal(scaleOptions.position) !== positionIsHorizontal(item.dposition)) {\r\n\t\t\t\tscaleOptions.position = item.dposition;\r\n\t\t\t}\r\n\r\n\t\t\tupdated[id] = true;\r\n\t\t\tvar scale = null;\r\n\t\t\tif (id in scales && scales[id].type === scaleType) {\r\n\t\t\t\tscale = scales[id];\r\n\t\t\t\tscale.options = scaleOptions;\r\n\t\t\t\tscale.ctx = me.ctx;\r\n\t\t\t\tscale.chart = me;\r\n\t\t\t} else {\r\n\t\t\t\tvar scaleClass = core_scaleService.getScaleConstructor(scaleType);\r\n\t\t\t\tif (!scaleClass) {\r\n\t\t\t\t\treturn;\r\n\t\t\t\t}\r\n\t\t\t\tscale = new scaleClass({\r\n\t\t\t\t\tid: id,\r\n\t\t\t\t\ttype: scaleType,\r\n\t\t\t\t\toptions: scaleOptions,\r\n\t\t\t\t\tctx: me.ctx,\r\n\t\t\t\t\tchart: me\r\n\t\t\t\t});\r\n\t\t\t\tscales[scale.id] = scale;\r\n\t\t\t}\r\n\r\n\t\t\tscale.mergeTicksOptions();\r\n\r\n\t\t\t// TODO(SB): I think we should be able to remove this custom case (options.scale)\r\n\t\t\t// and consider it as a regular scale part of the \"scales\"\" map only! This would\r\n\t\t\t// make the logic easier and remove some useless? custom code.\r\n\t\t\tif (item.isDefault) {\r\n\t\t\t\tme.scale = scale;\r\n\t\t\t}\r\n\t\t});\r\n\t\t// clear up discarded scales\r\n\t\thelpers$1.each(updated, function(hasUpdated, id) {\r\n\t\t\tif (!hasUpdated) {\r\n\t\t\t\tdelete scales[id];\r\n\t\t\t}\r\n\t\t});\r\n\r\n\t\tme.scales = scales;\r\n\r\n\t\tcore_scaleService.addScalesToLayout(this);\r\n\t},\r\n\r\n\tbuildOrUpdateControllers: function() {\r\n\t\tvar me = this;\r\n\t\tvar newControllers = [];\r\n\t\tvar datasets = me.data.datasets;\r\n\t\tvar i, ilen;\r\n\r\n\t\tfor (i = 0, ilen = datasets.length; i < ilen; i++) {\r\n\t\t\tvar dataset = datasets[i];\r\n\t\t\tvar meta = me.getDatasetMeta(i);\r\n\t\t\tvar type = dataset.type || me.config.type;\r\n\r\n\t\t\tif (meta.type && meta.type !== type) {\r\n\t\t\t\tme.destroyDatasetMeta(i);\r\n\t\t\t\tmeta = me.getDatasetMeta(i);\r\n\t\t\t}\r\n\t\t\tmeta.type = type;\r\n\t\t\tmeta.order = dataset.order || 0;\r\n\t\t\tmeta.index = i;\r\n\r\n\t\t\tif (meta.controller) {\r\n\t\t\t\tmeta.controller.updateIndex(i);\r\n\t\t\t\tmeta.controller.linkScales();\r\n\t\t\t} else {\r\n\t\t\t\tvar ControllerClass = controllers[meta.type];\r\n\t\t\t\tif (ControllerClass === undefined) {\r\n\t\t\t\t\tthrow new Error('\"' + meta.type + '\" is not a chart type.');\r\n\t\t\t\t}\r\n\r\n\t\t\t\tmeta.controller = new ControllerClass(me, i);\r\n\t\t\t\tnewControllers.push(meta.controller);\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\treturn newControllers;\r\n\t},\r\n\r\n\t/**\r\n\t * Reset the elements of all datasets\r\n\t * @private\r\n\t */\r\n\tresetElements: function() {\r\n\t\tvar me = this;\r\n\t\thelpers$1.each(me.data.datasets, function(dataset, datasetIndex) {\r\n\t\t\tme.getDatasetMeta(datasetIndex).controller.reset();\r\n\t\t}, me);\r\n\t},\r\n\r\n\t/**\r\n\t* Resets the chart back to it's state before the initial animation\r\n\t*/\r\n\treset: function() {\r\n\t\tthis.resetElements();\r\n\t\tthis.tooltip.initialize();\r\n\t},\r\n\r\n\tupdate: function(config) {\r\n\t\tvar me = this;\r\n\t\tvar i, ilen;\r\n\r\n\t\tif (!config || typeof config !== 'object') {\r\n\t\t\t// backwards compatibility\r\n\t\t\tconfig = {\r\n\t\t\t\tduration: config,\r\n\t\t\t\tlazy: arguments[1]\r\n\t\t\t};\r\n\t\t}\r\n\r\n\t\tupdateConfig(me);\r\n\r\n\t\t// plugins options references might have change, let's invalidate the cache\r\n\t\t// https://github.com/chartjs/Chart.js/issues/5111#issuecomment-355934167\r\n\t\tcore_plugins._invalidate(me);\r\n\r\n\t\tif (core_plugins.notify(me, 'beforeUpdate') === false) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\t// In case the entire data object changed\r\n\t\tme.tooltip._data = me.data;\r\n\r\n\t\t// Make sure dataset controllers are updated and new controllers are reset\r\n\t\tvar newControllers = me.buildOrUpdateControllers();\r\n\r\n\t\t// Make sure all dataset controllers have correct meta data counts\r\n\t\tfor (i = 0, ilen = me.data.datasets.length; i < ilen; i++) {\r\n\t\t\tme.getDatasetMeta(i).controller.buildOrUpdateElements();\r\n\t\t}\r\n\r\n\t\tme.updateLayout();\r\n\r\n\t\t// Can only reset the new controllers after the scales have been updated\r\n\t\tif (me.options.animation && me.options.animation.duration) {\r\n\t\t\thelpers$1.each(newControllers, function(controller) {\r\n\t\t\t\tcontroller.reset();\r\n\t\t\t});\r\n\t\t}\r\n\r\n\t\tme.updateDatasets();\r\n\r\n\t\t// Need to reset tooltip in case it is displayed with elements that are removed\r\n\t\t// after update.\r\n\t\tme.tooltip.initialize();\r\n\r\n\t\t// Last active contains items that were previously in the tooltip.\r\n\t\t// When we reset the tooltip, we need to clear it\r\n\t\tme.lastActive = [];\r\n\r\n\t\t// Do this before render so that any plugins that need final scale updates can use it\r\n\t\tcore_plugins.notify(me, 'afterUpdate');\r\n\r\n\t\tme._layers.sort(compare2Level('z', '_idx'));\r\n\r\n\t\tif (me._bufferedRender) {\r\n\t\t\tme._bufferedRequest = {\r\n\t\t\t\tduration: config.duration,\r\n\t\t\t\teasing: config.easing,\r\n\t\t\t\tlazy: config.lazy\r\n\t\t\t};\r\n\t\t} else {\r\n\t\t\tme.render(config);\r\n\t\t}\r\n\t},\r\n\r\n\t/**\r\n\t * Updates the chart layout unless a plugin returns `false` to the `beforeLayout`\r\n\t * hook, in which case, plugins will not be called on `afterLayout`.\r\n\t * @private\r\n\t */\r\n\tupdateLayout: function() {\r\n\t\tvar me = this;\r\n\r\n\t\tif (core_plugins.notify(me, 'beforeLayout') === false) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tcore_layouts.update(this, this.width, this.height);\r\n\r\n\t\tme._layers = [];\r\n\t\thelpers$1.each(me.boxes, function(box) {\r\n\t\t\t// _configure is called twice, once in core.scale.update and once here.\r\n\t\t\t// Here the boxes are fully updated and at their final positions.\r\n\t\t\tif (box._configure) {\r\n\t\t\t\tbox._configure();\r\n\t\t\t}\r\n\t\t\tme._layers.push.apply(me._layers, box._layers());\r\n\t\t}, me);\r\n\r\n\t\tme._layers.forEach(function(item, index) {\r\n\t\t\titem._idx = index;\r\n\t\t});\r\n\r\n\t\t/**\r\n\t\t * Provided for backward compatibility, use `afterLayout` instead.\r\n\t\t * @method IPlugin#afterScaleUpdate\r\n\t\t * @deprecated since version 2.5.0\r\n\t\t * @todo remove at version 3\r\n\t\t * @private\r\n\t\t */\r\n\t\tcore_plugins.notify(me, 'afterScaleUpdate');\r\n\t\tcore_plugins.notify(me, 'afterLayout');\r\n\t},\r\n\r\n\t/**\r\n\t * Updates all datasets unless a plugin returns `false` to the `beforeDatasetsUpdate`\r\n\t * hook, in which case, plugins will not be called on `afterDatasetsUpdate`.\r\n\t * @private\r\n\t */\r\n\tupdateDatasets: function() {\r\n\t\tvar me = this;\r\n\r\n\t\tif (core_plugins.notify(me, 'beforeDatasetsUpdate') === false) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tfor (var i = 0, ilen = me.data.datasets.length; i < ilen; ++i) {\r\n\t\t\tme.updateDataset(i);\r\n\t\t}\r\n\r\n\t\tcore_plugins.notify(me, 'afterDatasetsUpdate');\r\n\t},\r\n\r\n\t/**\r\n\t * Updates dataset at index unless a plugin returns `false` to the `beforeDatasetUpdate`\r\n\t * hook, in which case, plugins will not be called on `afterDatasetUpdate`.\r\n\t * @private\r\n\t */\r\n\tupdateDataset: function(index) {\r\n\t\tvar me = this;\r\n\t\tvar meta = me.getDatasetMeta(index);\r\n\t\tvar args = {\r\n\t\t\tmeta: meta,\r\n\t\t\tindex: index\r\n\t\t};\r\n\r\n\t\tif (core_plugins.notify(me, 'beforeDatasetUpdate', [args]) === false) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tmeta.controller._update();\r\n\r\n\t\tcore_plugins.notify(me, 'afterDatasetUpdate', [args]);\r\n\t},\r\n\r\n\trender: function(config) {\r\n\t\tvar me = this;\r\n\r\n\t\tif (!config || typeof config !== 'object') {\r\n\t\t\t// backwards compatibility\r\n\t\t\tconfig = {\r\n\t\t\t\tduration: config,\r\n\t\t\t\tlazy: arguments[1]\r\n\t\t\t};\r\n\t\t}\r\n\r\n\t\tvar animationOptions = me.options.animation;\r\n\t\tvar duration = valueOrDefault$9(config.duration, animationOptions && animationOptions.duration);\r\n\t\tvar lazy = config.lazy;\r\n\r\n\t\tif (core_plugins.notify(me, 'beforeRender') === false) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tvar onComplete = function(animation) {\r\n\t\t\tcore_plugins.notify(me, 'afterRender');\r\n\t\t\thelpers$1.callback(animationOptions && animationOptions.onComplete, [animation], me);\r\n\t\t};\r\n\r\n\t\tif (animationOptions && duration) {\r\n\t\t\tvar animation = new core_animation({\r\n\t\t\t\tnumSteps: duration / 16.66, // 60 fps\r\n\t\t\t\teasing: config.easing || animationOptions.easing,\r\n\r\n\t\t\t\trender: function(chart, animationObject) {\r\n\t\t\t\t\tvar easingFunction = helpers$1.easing.effects[animationObject.easing];\r\n\t\t\t\t\tvar currentStep = animationObject.currentStep;\r\n\t\t\t\t\tvar stepDecimal = currentStep / animationObject.numSteps;\r\n\r\n\t\t\t\t\tchart.draw(easingFunction(stepDecimal), stepDecimal, currentStep);\r\n\t\t\t\t},\r\n\r\n\t\t\t\tonAnimationProgress: animationOptions.onProgress,\r\n\t\t\t\tonAnimationComplete: onComplete\r\n\t\t\t});\r\n\r\n\t\t\tcore_animations.addAnimation(me, animation, duration, lazy);\r\n\t\t} else {\r\n\t\t\tme.draw();\r\n\r\n\t\t\t// See https://github.com/chartjs/Chart.js/issues/3781\r\n\t\t\tonComplete(new core_animation({numSteps: 0, chart: me}));\r\n\t\t}\r\n\r\n\t\treturn me;\r\n\t},\r\n\r\n\tdraw: function(easingValue) {\r\n\t\tvar me = this;\r\n\t\tvar i, layers;\r\n\r\n\t\tme.clear();\r\n\r\n\t\tif (helpers$1.isNullOrUndef(easingValue)) {\r\n\t\t\teasingValue = 1;\r\n\t\t}\r\n\r\n\t\tme.transition(easingValue);\r\n\r\n\t\tif (me.width <= 0 || me.height <= 0) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tif (core_plugins.notify(me, 'beforeDraw', [easingValue]) === false) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\t// Because of plugin hooks (before/afterDatasetsDraw), datasets can't\r\n\t\t// currently be part of layers. Instead, we draw\r\n\t\t// layers <= 0 before(default, backward compat), and the rest after\r\n\t\tlayers = me._layers;\r\n\t\tfor (i = 0; i < layers.length && layers[i].z <= 0; ++i) {\r\n\t\t\tlayers[i].draw(me.chartArea);\r\n\t\t}\r\n\r\n\t\tme.drawDatasets(easingValue);\r\n\r\n\t\t// Rest of layers\r\n\t\tfor (; i < layers.length; ++i) {\r\n\t\t\tlayers[i].draw(me.chartArea);\r\n\t\t}\r\n\r\n\t\tme._drawTooltip(easingValue);\r\n\r\n\t\tcore_plugins.notify(me, 'afterDraw', [easingValue]);\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\ttransition: function(easingValue) {\r\n\t\tvar me = this;\r\n\r\n\t\tfor (var i = 0, ilen = (me.data.datasets || []).length; i < ilen; ++i) {\r\n\t\t\tif (me.isDatasetVisible(i)) {\r\n\t\t\t\tme.getDatasetMeta(i).controller.transition(easingValue);\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\tme.tooltip.transition(easingValue);\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_getSortedDatasetMetas: function(filterVisible) {\r\n\t\tvar me = this;\r\n\t\tvar datasets = me.data.datasets || [];\r\n\t\tvar result = [];\r\n\t\tvar i, ilen;\r\n\r\n\t\tfor (i = 0, ilen = datasets.length; i < ilen; ++i) {\r\n\t\t\tif (!filterVisible || me.isDatasetVisible(i)) {\r\n\t\t\t\tresult.push(me.getDatasetMeta(i));\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\tresult.sort(compare2Level('order', 'index'));\r\n\r\n\t\treturn result;\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_getSortedVisibleDatasetMetas: function() {\r\n\t\treturn this._getSortedDatasetMetas(true);\r\n\t},\r\n\r\n\t/**\r\n\t * Draws all datasets unless a plugin returns `false` to the `beforeDatasetsDraw`\r\n\t * hook, in which case, plugins will not be called on `afterDatasetsDraw`.\r\n\t * @private\r\n\t */\r\n\tdrawDatasets: function(easingValue) {\r\n\t\tvar me = this;\r\n\t\tvar metasets, i;\r\n\r\n\t\tif (core_plugins.notify(me, 'beforeDatasetsDraw', [easingValue]) === false) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tmetasets = me._getSortedVisibleDatasetMetas();\r\n\t\tfor (i = metasets.length - 1; i >= 0; --i) {\r\n\t\t\tme.drawDataset(metasets[i], easingValue);\r\n\t\t}\r\n\r\n\t\tcore_plugins.notify(me, 'afterDatasetsDraw', [easingValue]);\r\n\t},\r\n\r\n\t/**\r\n\t * Draws dataset at index unless a plugin returns `false` to the `beforeDatasetDraw`\r\n\t * hook, in which case, plugins will not be called on `afterDatasetDraw`.\r\n\t * @private\r\n\t */\r\n\tdrawDataset: function(meta, easingValue) {\r\n\t\tvar me = this;\r\n\t\tvar args = {\r\n\t\t\tmeta: meta,\r\n\t\t\tindex: meta.index,\r\n\t\t\teasingValue: easingValue\r\n\t\t};\r\n\r\n\t\tif (core_plugins.notify(me, 'beforeDatasetDraw', [args]) === false) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tmeta.controller.draw(easingValue);\r\n\r\n\t\tcore_plugins.notify(me, 'afterDatasetDraw', [args]);\r\n\t},\r\n\r\n\t/**\r\n\t * Draws tooltip unless a plugin returns `false` to the `beforeTooltipDraw`\r\n\t * hook, in which case, plugins will not be called on `afterTooltipDraw`.\r\n\t * @private\r\n\t */\r\n\t_drawTooltip: function(easingValue) {\r\n\t\tvar me = this;\r\n\t\tvar tooltip = me.tooltip;\r\n\t\tvar args = {\r\n\t\t\ttooltip: tooltip,\r\n\t\t\teasingValue: easingValue\r\n\t\t};\r\n\r\n\t\tif (core_plugins.notify(me, 'beforeTooltipDraw', [args]) === false) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\ttooltip.draw();\r\n\r\n\t\tcore_plugins.notify(me, 'afterTooltipDraw', [args]);\r\n\t},\r\n\r\n\t/**\r\n\t * Get the single element that was clicked on\r\n\t * @return An object containing the dataset index and element index of the matching element. Also contains the rectangle that was draw\r\n\t */\r\n\tgetElementAtEvent: function(e) {\r\n\t\treturn core_interaction.modes.single(this, e);\r\n\t},\r\n\r\n\tgetElementsAtEvent: function(e) {\r\n\t\treturn core_interaction.modes.label(this, e, {intersect: true});\r\n\t},\r\n\r\n\tgetElementsAtXAxis: function(e) {\r\n\t\treturn core_interaction.modes['x-axis'](this, e, {intersect: true});\r\n\t},\r\n\r\n\tgetElementsAtEventForMode: function(e, mode, options) {\r\n\t\tvar method = core_interaction.modes[mode];\r\n\t\tif (typeof method === 'function') {\r\n\t\t\treturn method(this, e, options);\r\n\t\t}\r\n\r\n\t\treturn [];\r\n\t},\r\n\r\n\tgetDatasetAtEvent: function(e) {\r\n\t\treturn core_interaction.modes.dataset(this, e, {intersect: true});\r\n\t},\r\n\r\n\tgetDatasetMeta: function(datasetIndex) {\r\n\t\tvar me = this;\r\n\t\tvar dataset = me.data.datasets[datasetIndex];\r\n\t\tif (!dataset._meta) {\r\n\t\t\tdataset._meta = {};\r\n\t\t}\r\n\r\n\t\tvar meta = dataset._meta[me.id];\r\n\t\tif (!meta) {\r\n\t\t\tmeta = dataset._meta[me.id] = {\r\n\t\t\t\ttype: null,\r\n\t\t\t\tdata: [],\r\n\t\t\t\tdataset: null,\r\n\t\t\t\tcontroller: null,\r\n\t\t\t\thidden: null,\t\t\t// See isDatasetVisible() comment\r\n\t\t\t\txAxisID: null,\r\n\t\t\t\tyAxisID: null,\r\n\t\t\t\torder: dataset.order || 0,\r\n\t\t\t\tindex: datasetIndex\r\n\t\t\t};\r\n\t\t}\r\n\r\n\t\treturn meta;\r\n\t},\r\n\r\n\tgetVisibleDatasetCount: function() {\r\n\t\tvar count = 0;\r\n\t\tfor (var i = 0, ilen = this.data.datasets.length; i < ilen; ++i) {\r\n\t\t\tif (this.isDatasetVisible(i)) {\r\n\t\t\t\tcount++;\r\n\t\t\t}\r\n\t\t}\r\n\t\treturn count;\r\n\t},\r\n\r\n\tisDatasetVisible: function(datasetIndex) {\r\n\t\tvar meta = this.getDatasetMeta(datasetIndex);\r\n\r\n\t\t// meta.hidden is a per chart dataset hidden flag override with 3 states: if true or false,\r\n\t\t// the dataset.hidden value is ignored, else if null, the dataset hidden state is returned.\r\n\t\treturn typeof meta.hidden === 'boolean' ? !meta.hidden : !this.data.datasets[datasetIndex].hidden;\r\n\t},\r\n\r\n\tgenerateLegend: function() {\r\n\t\treturn this.options.legendCallback(this);\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\tdestroyDatasetMeta: function(datasetIndex) {\r\n\t\tvar id = this.id;\r\n\t\tvar dataset = this.data.datasets[datasetIndex];\r\n\t\tvar meta = dataset._meta && dataset._meta[id];\r\n\r\n\t\tif (meta) {\r\n\t\t\tmeta.controller.destroy();\r\n\t\t\tdelete dataset._meta[id];\r\n\t\t}\r\n\t},\r\n\r\n\tdestroy: function() {\r\n\t\tvar me = this;\r\n\t\tvar canvas = me.canvas;\r\n\t\tvar i, ilen;\r\n\r\n\t\tme.stop();\r\n\r\n\t\t// dataset controllers need to cleanup associated data\r\n\t\tfor (i = 0, ilen = me.data.datasets.length; i < ilen; ++i) {\r\n\t\t\tme.destroyDatasetMeta(i);\r\n\t\t}\r\n\r\n\t\tif (canvas) {\r\n\t\t\tme.unbindEvents();\r\n\t\t\thelpers$1.canvas.clear(me);\r\n\t\t\tplatform.releaseContext(me.ctx);\r\n\t\t\tme.canvas = null;\r\n\t\t\tme.ctx = null;\r\n\t\t}\r\n\r\n\t\tcore_plugins.notify(me, 'destroy');\r\n\r\n\t\tdelete Chart.instances[me.id];\r\n\t},\r\n\r\n\ttoBase64Image: function() {\r\n\t\treturn this.canvas.toDataURL.apply(this.canvas, arguments);\r\n\t},\r\n\r\n\tinitToolTip: function() {\r\n\t\tvar me = this;\r\n\t\tme.tooltip = new core_tooltip({\r\n\t\t\t_chart: me,\r\n\t\t\t_chartInstance: me, // deprecated, backward compatibility\r\n\t\t\t_data: me.data,\r\n\t\t\t_options: me.options.tooltips\r\n\t\t}, me);\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\tbindEvents: function() {\r\n\t\tvar me = this;\r\n\t\tvar listeners = me._listeners = {};\r\n\t\tvar listener = function() {\r\n\t\t\tme.eventHandler.apply(me, arguments);\r\n\t\t};\r\n\r\n\t\thelpers$1.each(me.options.events, function(type) {\r\n\t\t\tplatform.addEventListener(me, type, listener);\r\n\t\t\tlisteners[type] = listener;\r\n\t\t});\r\n\r\n\t\t// Elements used to detect size change should not be injected for non responsive charts.\r\n\t\t// See https://github.com/chartjs/Chart.js/issues/2210\r\n\t\tif (me.options.responsive) {\r\n\t\t\tlistener = function() {\r\n\t\t\t\tme.resize();\r\n\t\t\t};\r\n\r\n\t\t\tplatform.addEventListener(me, 'resize', listener);\r\n\t\t\tlisteners.resize = listener;\r\n\t\t}\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\tunbindEvents: function() {\r\n\t\tvar me = this;\r\n\t\tvar listeners = me._listeners;\r\n\t\tif (!listeners) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tdelete me._listeners;\r\n\t\thelpers$1.each(listeners, function(listener, type) {\r\n\t\t\tplatform.removeEventListener(me, type, listener);\r\n\t\t});\r\n\t},\r\n\r\n\tupdateHoverStyle: function(elements, mode, enabled) {\r\n\t\tvar prefix = enabled ? 'set' : 'remove';\r\n\t\tvar element, i, ilen;\r\n\r\n\t\tfor (i = 0, ilen = elements.length; i < ilen; ++i) {\r\n\t\t\telement = elements[i];\r\n\t\t\tif (element) {\r\n\t\t\t\tthis.getDatasetMeta(element._datasetIndex).controller[prefix + 'HoverStyle'](element);\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\tif (mode === 'dataset') {\r\n\t\t\tthis.getDatasetMeta(elements[0]._datasetIndex).controller['_' + prefix + 'DatasetHoverStyle']();\r\n\t\t}\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\teventHandler: function(e) {\r\n\t\tvar me = this;\r\n\t\tvar tooltip = me.tooltip;\r\n\r\n\t\tif (core_plugins.notify(me, 'beforeEvent', [e]) === false) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\t// Buffer any update calls so that renders do not occur\r\n\t\tme._bufferedRender = true;\r\n\t\tme._bufferedRequest = null;\r\n\r\n\t\tvar changed = me.handleEvent(e);\r\n\t\t// for smooth tooltip animations issue #4989\r\n\t\t// the tooltip should be the source of change\r\n\t\t// Animation check workaround:\r\n\t\t// tooltip._start will be null when tooltip isn't animating\r\n\t\tif (tooltip) {\r\n\t\t\tchanged = tooltip._start\r\n\t\t\t\t? tooltip.handleEvent(e)\r\n\t\t\t\t: changed | tooltip.handleEvent(e);\r\n\t\t}\r\n\r\n\t\tcore_plugins.notify(me, 'afterEvent', [e]);\r\n\r\n\t\tvar bufferedRequest = me._bufferedRequest;\r\n\t\tif (bufferedRequest) {\r\n\t\t\t// If we have an update that was triggered, we need to do a normal render\r\n\t\t\tme.render(bufferedRequest);\r\n\t\t} else if (changed && !me.animating) {\r\n\t\t\t// If entering, leaving, or changing elements, animate the change via pivot\r\n\t\t\tme.stop();\r\n\r\n\t\t\t// We only need to render at this point. Updating will cause scales to be\r\n\t\t\t// recomputed generating flicker & using more memory than necessary.\r\n\t\t\tme.render({\r\n\t\t\t\tduration: me.options.hover.animationDuration,\r\n\t\t\t\tlazy: true\r\n\t\t\t});\r\n\t\t}\r\n\r\n\t\tme._bufferedRender = false;\r\n\t\tme._bufferedRequest = null;\r\n\r\n\t\treturn me;\r\n\t},\r\n\r\n\t/**\r\n\t * Handle an event\r\n\t * @private\r\n\t * @param {IEvent} event the event to handle\r\n\t * @return {boolean} true if the chart needs to re-render\r\n\t */\r\n\thandleEvent: function(e) {\r\n\t\tvar me = this;\r\n\t\tvar options = me.options || {};\r\n\t\tvar hoverOptions = options.hover;\r\n\t\tvar changed = false;\r\n\r\n\t\tme.lastActive = me.lastActive || [];\r\n\r\n\t\t// Find Active Elements for hover and tooltips\r\n\t\tif (e.type === 'mouseout') {\r\n\t\t\tme.active = [];\r\n\t\t} else {\r\n\t\t\tme.active = me.getElementsAtEventForMode(e, hoverOptions.mode, hoverOptions);\r\n\t\t}\r\n\r\n\t\t// Invoke onHover hook\r\n\t\t// Need to call with native event here to not break backwards compatibility\r\n\t\thelpers$1.callback(options.onHover || options.hover.onHover, [e.native, me.active], me);\r\n\r\n\t\tif (e.type === 'mouseup' || e.type === 'click') {\r\n\t\t\tif (options.onClick) {\r\n\t\t\t\t// Use e.native here for backwards compatibility\r\n\t\t\t\toptions.onClick.call(me, e.native, me.active);\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\t// Remove styling for last active (even if it may still be active)\r\n\t\tif (me.lastActive.length) {\r\n\t\t\tme.updateHoverStyle(me.lastActive, hoverOptions.mode, false);\r\n\t\t}\r\n\r\n\t\t// Built in hover styling\r\n\t\tif (me.active.length && hoverOptions.mode) {\r\n\t\t\tme.updateHoverStyle(me.active, hoverOptions.mode, true);\r\n\t\t}\r\n\r\n\t\tchanged = !helpers$1.arrayEquals(me.active, me.lastActive);\r\n\r\n\t\t// Remember Last Actives\r\n\t\tme.lastActive = me.active;\r\n\r\n\t\treturn changed;\r\n\t}\r\n});\r\n\r\n/**\r\n * NOTE(SB) We actually don't use this container anymore but we need to keep it\r\n * for backward compatibility. Though, it can still be useful for plugins that\r\n * would need to work on multiple charts?!\r\n */\r\nChart.instances = {};\r\n\r\nvar core_controller = Chart;\r\n\r\n// DEPRECATIONS\r\n\r\n/**\r\n * Provided for backward compatibility, use Chart instead.\r\n * @class Chart.Controller\r\n * @deprecated since version 2.6\r\n * @todo remove at version 3\r\n * @private\r\n */\r\nChart.Controller = Chart;\r\n\r\n/**\r\n * Provided for backward compatibility, not available anymore.\r\n * @namespace Chart\r\n * @deprecated since version 2.8\r\n * @todo remove at version 3\r\n * @private\r\n */\r\nChart.types = {};\r\n\r\n/**\r\n * Provided for backward compatibility, not available anymore.\r\n * @namespace Chart.helpers.configMerge\r\n * @deprecated since version 2.8.0\r\n * @todo remove at version 3\r\n * @private\r\n */\r\nhelpers$1.configMerge = mergeConfig;\r\n\r\n/**\r\n * Provided for backward compatibility, not available anymore.\r\n * @namespace Chart.helpers.scaleMerge\r\n * @deprecated since version 2.8.0\r\n * @todo remove at version 3\r\n * @private\r\n */\r\nhelpers$1.scaleMerge = mergeScaleConfig;\n\nvar core_helpers = function() {\r\n\r\n\t// -- Basic js utility methods\r\n\r\n\thelpers$1.where = function(collection, filterCallback) {\r\n\t\tif (helpers$1.isArray(collection) && Array.prototype.filter) {\r\n\t\t\treturn collection.filter(filterCallback);\r\n\t\t}\r\n\t\tvar filtered = [];\r\n\r\n\t\thelpers$1.each(collection, function(item) {\r\n\t\t\tif (filterCallback(item)) {\r\n\t\t\t\tfiltered.push(item);\r\n\t\t\t}\r\n\t\t});\r\n\r\n\t\treturn filtered;\r\n\t};\r\n\thelpers$1.findIndex = Array.prototype.findIndex ?\r\n\t\tfunction(array, callback, scope) {\r\n\t\t\treturn array.findIndex(callback, scope);\r\n\t\t} :\r\n\t\tfunction(array, callback, scope) {\r\n\t\t\tscope = scope === undefined ? array : scope;\r\n\t\t\tfor (var i = 0, ilen = array.length; i < ilen; ++i) {\r\n\t\t\t\tif (callback.call(scope, array[i], i, array)) {\r\n\t\t\t\t\treturn i;\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t\treturn -1;\r\n\t\t};\r\n\thelpers$1.findNextWhere = function(arrayToSearch, filterCallback, startIndex) {\r\n\t\t// Default to start of the array\r\n\t\tif (helpers$1.isNullOrUndef(startIndex)) {\r\n\t\t\tstartIndex = -1;\r\n\t\t}\r\n\t\tfor (var i = startIndex + 1; i < arrayToSearch.length; i++) {\r\n\t\t\tvar currentItem = arrayToSearch[i];\r\n\t\t\tif (filterCallback(currentItem)) {\r\n\t\t\t\treturn currentItem;\r\n\t\t\t}\r\n\t\t}\r\n\t};\r\n\thelpers$1.findPreviousWhere = function(arrayToSearch, filterCallback, startIndex) {\r\n\t\t// Default to end of the array\r\n\t\tif (helpers$1.isNullOrUndef(startIndex)) {\r\n\t\t\tstartIndex = arrayToSearch.length;\r\n\t\t}\r\n\t\tfor (var i = startIndex - 1; i >= 0; i--) {\r\n\t\t\tvar currentItem = arrayToSearch[i];\r\n\t\t\tif (filterCallback(currentItem)) {\r\n\t\t\t\treturn currentItem;\r\n\t\t\t}\r\n\t\t}\r\n\t};\r\n\r\n\t// -- Math methods\r\n\thelpers$1.isNumber = function(n) {\r\n\t\treturn !isNaN(parseFloat(n)) && isFinite(n);\r\n\t};\r\n\thelpers$1.almostEquals = function(x, y, epsilon) {\r\n\t\treturn Math.abs(x - y) < epsilon;\r\n\t};\r\n\thelpers$1.almostWhole = function(x, epsilon) {\r\n\t\tvar rounded = Math.round(x);\r\n\t\treturn ((rounded - epsilon) <= x) && ((rounded + epsilon) >= x);\r\n\t};\r\n\thelpers$1.max = function(array) {\r\n\t\treturn array.reduce(function(max, value) {\r\n\t\t\tif (!isNaN(value)) {\r\n\t\t\t\treturn Math.max(max, value);\r\n\t\t\t}\r\n\t\t\treturn max;\r\n\t\t}, Number.NEGATIVE_INFINITY);\r\n\t};\r\n\thelpers$1.min = function(array) {\r\n\t\treturn array.reduce(function(min, value) {\r\n\t\t\tif (!isNaN(value)) {\r\n\t\t\t\treturn Math.min(min, value);\r\n\t\t\t}\r\n\t\t\treturn min;\r\n\t\t}, Number.POSITIVE_INFINITY);\r\n\t};\r\n\thelpers$1.sign = Math.sign ?\r\n\t\tfunction(x) {\r\n\t\t\treturn Math.sign(x);\r\n\t\t} :\r\n\t\tfunction(x) {\r\n\t\t\tx = +x; // convert to a number\r\n\t\t\tif (x === 0 || isNaN(x)) {\r\n\t\t\t\treturn x;\r\n\t\t\t}\r\n\t\t\treturn x > 0 ? 1 : -1;\r\n\t\t};\r\n\thelpers$1.toRadians = function(degrees) {\r\n\t\treturn degrees * (Math.PI / 180);\r\n\t};\r\n\thelpers$1.toDegrees = function(radians) {\r\n\t\treturn radians * (180 / Math.PI);\r\n\t};\r\n\r\n\t/**\r\n\t * Returns the number of decimal places\r\n\t * i.e. the number of digits after the decimal point, of the value of this Number.\r\n\t * @param {number} x - A number.\r\n\t * @returns {number} The number of decimal places.\r\n\t * @private\r\n\t */\r\n\thelpers$1._decimalPlaces = function(x) {\r\n\t\tif (!helpers$1.isFinite(x)) {\r\n\t\t\treturn;\r\n\t\t}\r\n\t\tvar e = 1;\r\n\t\tvar p = 0;\r\n\t\twhile (Math.round(x * e) / e !== x) {\r\n\t\t\te *= 10;\r\n\t\t\tp++;\r\n\t\t}\r\n\t\treturn p;\r\n\t};\r\n\r\n\t// Gets the angle from vertical upright to the point about a centre.\r\n\thelpers$1.getAngleFromPoint = function(centrePoint, anglePoint) {\r\n\t\tvar distanceFromXCenter = anglePoint.x - centrePoint.x;\r\n\t\tvar distanceFromYCenter = anglePoint.y - centrePoint.y;\r\n\t\tvar radialDistanceFromCenter = Math.sqrt(distanceFromXCenter * distanceFromXCenter + distanceFromYCenter * distanceFromYCenter);\r\n\r\n\t\tvar angle = Math.atan2(distanceFromYCenter, distanceFromXCenter);\r\n\r\n\t\tif (angle < (-0.5 * Math.PI)) {\r\n\t\t\tangle += 2.0 * Math.PI; // make sure the returned angle is in the range of (-PI/2, 3PI/2]\r\n\t\t}\r\n\r\n\t\treturn {\r\n\t\t\tangle: angle,\r\n\t\t\tdistance: radialDistanceFromCenter\r\n\t\t};\r\n\t};\r\n\thelpers$1.distanceBetweenPoints = function(pt1, pt2) {\r\n\t\treturn Math.sqrt(Math.pow(pt2.x - pt1.x, 2) + Math.pow(pt2.y - pt1.y, 2));\r\n\t};\r\n\r\n\t/**\r\n\t * Provided for backward compatibility, not available anymore\r\n\t * @function Chart.helpers.aliasPixel\r\n\t * @deprecated since version 2.8.0\r\n\t * @todo remove at version 3\r\n\t */\r\n\thelpers$1.aliasPixel = function(pixelWidth) {\r\n\t\treturn (pixelWidth % 2 === 0) ? 0 : 0.5;\r\n\t};\r\n\r\n\t/**\r\n\t * Returns the aligned pixel value to avoid anti-aliasing blur\r\n\t * @param {Chart} chart - The chart instance.\r\n\t * @param {number} pixel - A pixel value.\r\n\t * @param {number} width - The width of the element.\r\n\t * @returns {number} The aligned pixel value.\r\n\t * @private\r\n\t */\r\n\thelpers$1._alignPixel = function(chart, pixel, width) {\r\n\t\tvar devicePixelRatio = chart.currentDevicePixelRatio;\r\n\t\tvar halfWidth = width / 2;\r\n\t\treturn Math.round((pixel - halfWidth) * devicePixelRatio) / devicePixelRatio + halfWidth;\r\n\t};\r\n\r\n\thelpers$1.splineCurve = function(firstPoint, middlePoint, afterPoint, t) {\r\n\t\t// Props to Rob Spencer at scaled innovation for his post on splining between points\r\n\t\t// http://scaledinnovation.com/analytics/splines/aboutSplines.html\r\n\r\n\t\t// This function must also respect \"skipped\" points\r\n\r\n\t\tvar previous = firstPoint.skip ? middlePoint : firstPoint;\r\n\t\tvar current = middlePoint;\r\n\t\tvar next = afterPoint.skip ? middlePoint : afterPoint;\r\n\r\n\t\tvar d01 = Math.sqrt(Math.pow(current.x - previous.x, 2) + Math.pow(current.y - previous.y, 2));\r\n\t\tvar d12 = Math.sqrt(Math.pow(next.x - current.x, 2) + Math.pow(next.y - current.y, 2));\r\n\r\n\t\tvar s01 = d01 / (d01 + d12);\r\n\t\tvar s12 = d12 / (d01 + d12);\r\n\r\n\t\t// If all points are the same, s01 & s02 will be inf\r\n\t\ts01 = isNaN(s01) ? 0 : s01;\r\n\t\ts12 = isNaN(s12) ? 0 : s12;\r\n\r\n\t\tvar fa = t * s01; // scaling factor for triangle Ta\r\n\t\tvar fb = t * s12;\r\n\r\n\t\treturn {\r\n\t\t\tprevious: {\r\n\t\t\t\tx: current.x - fa * (next.x - previous.x),\r\n\t\t\t\ty: current.y - fa * (next.y - previous.y)\r\n\t\t\t},\r\n\t\t\tnext: {\r\n\t\t\t\tx: current.x + fb * (next.x - previous.x),\r\n\t\t\t\ty: current.y + fb * (next.y - previous.y)\r\n\t\t\t}\r\n\t\t};\r\n\t};\r\n\thelpers$1.EPSILON = Number.EPSILON || 1e-14;\r\n\thelpers$1.splineCurveMonotone = function(points) {\r\n\t\t// This function calculates Bézier control points in a similar way than |splineCurve|,\r\n\t\t// but preserves monotonicity of the provided data and ensures no local extremums are added\r\n\t\t// between the dataset discrete points due to the interpolation.\r\n\t\t// See : https://en.wikipedia.org/wiki/Monotone_cubic_interpolation\r\n\r\n\t\tvar pointsWithTangents = (points || []).map(function(point) {\r\n\t\t\treturn {\r\n\t\t\t\tmodel: point._model,\r\n\t\t\t\tdeltaK: 0,\r\n\t\t\t\tmK: 0\r\n\t\t\t};\r\n\t\t});\r\n\r\n\t\t// Calculate slopes (deltaK) and initialize tangents (mK)\r\n\t\tvar pointsLen = pointsWithTangents.length;\r\n\t\tvar i, pointBefore, pointCurrent, pointAfter;\r\n\t\tfor (i = 0; i < pointsLen; ++i) {\r\n\t\t\tpointCurrent = pointsWithTangents[i];\r\n\t\t\tif (pointCurrent.model.skip) {\r\n\t\t\t\tcontinue;\r\n\t\t\t}\r\n\r\n\t\t\tpointBefore = i > 0 ? pointsWithTangents[i - 1] : null;\r\n\t\t\tpointAfter = i < pointsLen - 1 ? pointsWithTangents[i + 1] : null;\r\n\t\t\tif (pointAfter && !pointAfter.model.skip) {\r\n\t\t\t\tvar slopeDeltaX = (pointAfter.model.x - pointCurrent.model.x);\r\n\r\n\t\t\t\t// In the case of two points that appear at the same x pixel, slopeDeltaX is 0\r\n\t\t\t\tpointCurrent.deltaK = slopeDeltaX !== 0 ? (pointAfter.model.y - pointCurrent.model.y) / slopeDeltaX : 0;\r\n\t\t\t}\r\n\r\n\t\t\tif (!pointBefore || pointBefore.model.skip) {\r\n\t\t\t\tpointCurrent.mK = pointCurrent.deltaK;\r\n\t\t\t} else if (!pointAfter || pointAfter.model.skip) {\r\n\t\t\t\tpointCurrent.mK = pointBefore.deltaK;\r\n\t\t\t} else if (this.sign(pointBefore.deltaK) !== this.sign(pointCurrent.deltaK)) {\r\n\t\t\t\tpointCurrent.mK = 0;\r\n\t\t\t} else {\r\n\t\t\t\tpointCurrent.mK = (pointBefore.deltaK + pointCurrent.deltaK) / 2;\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\t// Adjust tangents to ensure monotonic properties\r\n\t\tvar alphaK, betaK, tauK, squaredMagnitude;\r\n\t\tfor (i = 0; i < pointsLen - 1; ++i) {\r\n\t\t\tpointCurrent = pointsWithTangents[i];\r\n\t\t\tpointAfter = pointsWithTangents[i + 1];\r\n\t\t\tif (pointCurrent.model.skip || pointAfter.model.skip) {\r\n\t\t\t\tcontinue;\r\n\t\t\t}\r\n\r\n\t\t\tif (helpers$1.almostEquals(pointCurrent.deltaK, 0, this.EPSILON)) {\r\n\t\t\t\tpointCurrent.mK = pointAfter.mK = 0;\r\n\t\t\t\tcontinue;\r\n\t\t\t}\r\n\r\n\t\t\talphaK = pointCurrent.mK / pointCurrent.deltaK;\r\n\t\t\tbetaK = pointAfter.mK / pointCurrent.deltaK;\r\n\t\t\tsquaredMagnitude = Math.pow(alphaK, 2) + Math.pow(betaK, 2);\r\n\t\t\tif (squaredMagnitude <= 9) {\r\n\t\t\t\tcontinue;\r\n\t\t\t}\r\n\r\n\t\t\ttauK = 3 / Math.sqrt(squaredMagnitude);\r\n\t\t\tpointCurrent.mK = alphaK * tauK * pointCurrent.deltaK;\r\n\t\t\tpointAfter.mK = betaK * tauK * pointCurrent.deltaK;\r\n\t\t}\r\n\r\n\t\t// Compute control points\r\n\t\tvar deltaX;\r\n\t\tfor (i = 0; i < pointsLen; ++i) {\r\n\t\t\tpointCurrent = pointsWithTangents[i];\r\n\t\t\tif (pointCurrent.model.skip) {\r\n\t\t\t\tcontinue;\r\n\t\t\t}\r\n\r\n\t\t\tpointBefore = i > 0 ? pointsWithTangents[i - 1] : null;\r\n\t\t\tpointAfter = i < pointsLen - 1 ? pointsWithTangents[i + 1] : null;\r\n\t\t\tif (pointBefore && !pointBefore.model.skip) {\r\n\t\t\t\tdeltaX = (pointCurrent.model.x - pointBefore.model.x) / 3;\r\n\t\t\t\tpointCurrent.model.controlPointPreviousX = pointCurrent.model.x - deltaX;\r\n\t\t\t\tpointCurrent.model.controlPointPreviousY = pointCurrent.model.y - deltaX * pointCurrent.mK;\r\n\t\t\t}\r\n\t\t\tif (pointAfter && !pointAfter.model.skip) {\r\n\t\t\t\tdeltaX = (pointAfter.model.x - pointCurrent.model.x) / 3;\r\n\t\t\t\tpointCurrent.model.controlPointNextX = pointCurrent.model.x + deltaX;\r\n\t\t\t\tpointCurrent.model.controlPointNextY = pointCurrent.model.y + deltaX * pointCurrent.mK;\r\n\t\t\t}\r\n\t\t}\r\n\t};\r\n\thelpers$1.nextItem = function(collection, index, loop) {\r\n\t\tif (loop) {\r\n\t\t\treturn index >= collection.length - 1 ? collection[0] : collection[index + 1];\r\n\t\t}\r\n\t\treturn index >= collection.length - 1 ? collection[collection.length - 1] : collection[index + 1];\r\n\t};\r\n\thelpers$1.previousItem = function(collection, index, loop) {\r\n\t\tif (loop) {\r\n\t\t\treturn index <= 0 ? collection[collection.length - 1] : collection[index - 1];\r\n\t\t}\r\n\t\treturn index <= 0 ? collection[0] : collection[index - 1];\r\n\t};\r\n\t// Implementation of the nice number algorithm used in determining where axis labels will go\r\n\thelpers$1.niceNum = function(range, round) {\r\n\t\tvar exponent = Math.floor(helpers$1.log10(range));\r\n\t\tvar fraction = range / Math.pow(10, exponent);\r\n\t\tvar niceFraction;\r\n\r\n\t\tif (round) {\r\n\t\t\tif (fraction < 1.5) {\r\n\t\t\t\tniceFraction = 1;\r\n\t\t\t} else if (fraction < 3) {\r\n\t\t\t\tniceFraction = 2;\r\n\t\t\t} else if (fraction < 7) {\r\n\t\t\t\tniceFraction = 5;\r\n\t\t\t} else {\r\n\t\t\t\tniceFraction = 10;\r\n\t\t\t}\r\n\t\t} else if (fraction <= 1.0) {\r\n\t\t\tniceFraction = 1;\r\n\t\t} else if (fraction <= 2) {\r\n\t\t\tniceFraction = 2;\r\n\t\t} else if (fraction <= 5) {\r\n\t\t\tniceFraction = 5;\r\n\t\t} else {\r\n\t\t\tniceFraction = 10;\r\n\t\t}\r\n\r\n\t\treturn niceFraction * Math.pow(10, exponent);\r\n\t};\r\n\t// Request animation polyfill - https://www.paulirish.com/2011/requestanimationframe-for-smart-animating/\r\n\thelpers$1.requestAnimFrame = (function() {\r\n\t\tif (typeof window === 'undefined') {\r\n\t\t\treturn function(callback) {\r\n\t\t\t\tcallback();\r\n\t\t\t};\r\n\t\t}\r\n\t\treturn window.requestAnimationFrame ||\r\n\t\t\twindow.webkitRequestAnimationFrame ||\r\n\t\t\twindow.mozRequestAnimationFrame ||\r\n\t\t\twindow.oRequestAnimationFrame ||\r\n\t\t\twindow.msRequestAnimationFrame ||\r\n\t\t\tfunction(callback) {\r\n\t\t\t\treturn window.setTimeout(callback, 1000 / 60);\r\n\t\t\t};\r\n\t}());\r\n\t// -- DOM methods\r\n\thelpers$1.getRelativePosition = function(evt, chart) {\r\n\t\tvar mouseX, mouseY;\r\n\t\tvar e = evt.originalEvent || evt;\r\n\t\tvar canvas = evt.target || evt.srcElement;\r\n\t\tvar boundingRect = canvas.getBoundingClientRect();\r\n\r\n\t\tvar touches = e.touches;\r\n\t\tif (touches && touches.length > 0) {\r\n\t\t\tmouseX = touches[0].clientX;\r\n\t\t\tmouseY = touches[0].clientY;\r\n\r\n\t\t} else {\r\n\t\t\tmouseX = e.clientX;\r\n\t\t\tmouseY = e.clientY;\r\n\t\t}\r\n\r\n\t\t// Scale mouse coordinates into canvas coordinates\r\n\t\t// by following the pattern laid out by 'jerryj' in the comments of\r\n\t\t// https://www.html5canvastutorials.com/advanced/html5-canvas-mouse-coordinates/\r\n\t\tvar paddingLeft = parseFloat(helpers$1.getStyle(canvas, 'padding-left'));\r\n\t\tvar paddingTop = parseFloat(helpers$1.getStyle(canvas, 'padding-top'));\r\n\t\tvar paddingRight = parseFloat(helpers$1.getStyle(canvas, 'padding-right'));\r\n\t\tvar paddingBottom = parseFloat(helpers$1.getStyle(canvas, 'padding-bottom'));\r\n\t\tvar width = boundingRect.right - boundingRect.left - paddingLeft - paddingRight;\r\n\t\tvar height = boundingRect.bottom - boundingRect.top - paddingTop - paddingBottom;\r\n\r\n\t\t// We divide by the current device pixel ratio, because the canvas is scaled up by that amount in each direction. However\r\n\t\t// the backend model is in unscaled coordinates. Since we are going to deal with our model coordinates, we go back here\r\n\t\tmouseX = Math.round((mouseX - boundingRect.left - paddingLeft) / (width) * canvas.width / chart.currentDevicePixelRatio);\r\n\t\tmouseY = Math.round((mouseY - boundingRect.top - paddingTop) / (height) * canvas.height / chart.currentDevicePixelRatio);\r\n\r\n\t\treturn {\r\n\t\t\tx: mouseX,\r\n\t\t\ty: mouseY\r\n\t\t};\r\n\r\n\t};\r\n\r\n\t// Private helper function to convert max-width/max-height values that may be percentages into a number\r\n\tfunction parseMaxStyle(styleValue, node, parentProperty) {\r\n\t\tvar valueInPixels;\r\n\t\tif (typeof styleValue === 'string') {\r\n\t\t\tvalueInPixels = parseInt(styleValue, 10);\r\n\r\n\t\t\tif (styleValue.indexOf('%') !== -1) {\r\n\t\t\t\t// percentage * size in dimension\r\n\t\t\t\tvalueInPixels = valueInPixels / 100 * node.parentNode[parentProperty];\r\n\t\t\t}\r\n\t\t} else {\r\n\t\t\tvalueInPixels = styleValue;\r\n\t\t}\r\n\r\n\t\treturn valueInPixels;\r\n\t}\r\n\r\n\t/**\r\n\t * Returns if the given value contains an effective constraint.\r\n\t * @private\r\n\t */\r\n\tfunction isConstrainedValue(value) {\r\n\t\treturn value !== undefined && value !== null && value !== 'none';\r\n\t}\r\n\r\n\t/**\r\n\t * Returns the max width or height of the given DOM node in a cross-browser compatible fashion\r\n\t * @param {HTMLElement} domNode - the node to check the constraint on\r\n\t * @param {string} maxStyle - the style that defines the maximum for the direction we are using ('max-width' / 'max-height')\r\n\t * @param {string} percentageProperty - property of parent to use when calculating width as a percentage\r\n\t * @see {@link https://www.nathanaeljones.com/blog/2013/reading-max-width-cross-browser}\r\n\t */\r\n\tfunction getConstraintDimension(domNode, maxStyle, percentageProperty) {\r\n\t\tvar view = document.defaultView;\r\n\t\tvar parentNode = helpers$1._getParentNode(domNode);\r\n\t\tvar constrainedNode = view.getComputedStyle(domNode)[maxStyle];\r\n\t\tvar constrainedContainer = view.getComputedStyle(parentNode)[maxStyle];\r\n\t\tvar hasCNode = isConstrainedValue(constrainedNode);\r\n\t\tvar hasCContainer = isConstrainedValue(constrainedContainer);\r\n\t\tvar infinity = Number.POSITIVE_INFINITY;\r\n\r\n\t\tif (hasCNode || hasCContainer) {\r\n\t\t\treturn Math.min(\r\n\t\t\t\thasCNode ? parseMaxStyle(constrainedNode, domNode, percentageProperty) : infinity,\r\n\t\t\t\thasCContainer ? parseMaxStyle(constrainedContainer, parentNode, percentageProperty) : infinity);\r\n\t\t}\r\n\r\n\t\treturn 'none';\r\n\t}\r\n\t// returns Number or undefined if no constraint\r\n\thelpers$1.getConstraintWidth = function(domNode) {\r\n\t\treturn getConstraintDimension(domNode, 'max-width', 'clientWidth');\r\n\t};\r\n\t// returns Number or undefined if no constraint\r\n\thelpers$1.getConstraintHeight = function(domNode) {\r\n\t\treturn getConstraintDimension(domNode, 'max-height', 'clientHeight');\r\n\t};\r\n\t/**\r\n\t * @private\r\n \t */\r\n\thelpers$1._calculatePadding = function(container, padding, parentDimension) {\r\n\t\tpadding = helpers$1.getStyle(container, padding);\r\n\r\n\t\treturn padding.indexOf('%') > -1 ? parentDimension * parseInt(padding, 10) / 100 : parseInt(padding, 10);\r\n\t};\r\n\t/**\r\n\t * @private\r\n\t */\r\n\thelpers$1._getParentNode = function(domNode) {\r\n\t\tvar parent = domNode.parentNode;\r\n\t\tif (parent && parent.toString() === '[object ShadowRoot]') {\r\n\t\t\tparent = parent.host;\r\n\t\t}\r\n\t\treturn parent;\r\n\t};\r\n\thelpers$1.getMaximumWidth = function(domNode) {\r\n\t\tvar container = helpers$1._getParentNode(domNode);\r\n\t\tif (!container) {\r\n\t\t\treturn domNode.clientWidth;\r\n\t\t}\r\n\r\n\t\tvar clientWidth = container.clientWidth;\r\n\t\tvar paddingLeft = helpers$1._calculatePadding(container, 'padding-left', clientWidth);\r\n\t\tvar paddingRight = helpers$1._calculatePadding(container, 'padding-right', clientWidth);\r\n\r\n\t\tvar w = clientWidth - paddingLeft - paddingRight;\r\n\t\tvar cw = helpers$1.getConstraintWidth(domNode);\r\n\t\treturn isNaN(cw) ? w : Math.min(w, cw);\r\n\t};\r\n\thelpers$1.getMaximumHeight = function(domNode) {\r\n\t\tvar container = helpers$1._getParentNode(domNode);\r\n\t\tif (!container) {\r\n\t\t\treturn domNode.clientHeight;\r\n\t\t}\r\n\r\n\t\tvar clientHeight = container.clientHeight;\r\n\t\tvar paddingTop = helpers$1._calculatePadding(container, 'padding-top', clientHeight);\r\n\t\tvar paddingBottom = helpers$1._calculatePadding(container, 'padding-bottom', clientHeight);\r\n\r\n\t\tvar h = clientHeight - paddingTop - paddingBottom;\r\n\t\tvar ch = helpers$1.getConstraintHeight(domNode);\r\n\t\treturn isNaN(ch) ? h : Math.min(h, ch);\r\n\t};\r\n\thelpers$1.getStyle = function(el, property) {\r\n\t\treturn el.currentStyle ?\r\n\t\t\tel.currentStyle[property] :\r\n\t\t\tdocument.defaultView.getComputedStyle(el, null).getPropertyValue(property);\r\n\t};\r\n\thelpers$1.retinaScale = function(chart, forceRatio) {\r\n\t\tvar pixelRatio = chart.currentDevicePixelRatio = forceRatio || (typeof window !== 'undefined' && window.devicePixelRatio) || 1;\r\n\t\tif (pixelRatio === 1) {\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tvar canvas = chart.canvas;\r\n\t\tvar height = chart.height;\r\n\t\tvar width = chart.width;\r\n\r\n\t\tcanvas.height = height * pixelRatio;\r\n\t\tcanvas.width = width * pixelRatio;\r\n\t\tchart.ctx.scale(pixelRatio, pixelRatio);\r\n\r\n\t\t// If no style has been set on the canvas, the render size is used as display size,\r\n\t\t// making the chart visually bigger, so let's enforce it to the \"correct\" values.\r\n\t\t// See https://github.com/chartjs/Chart.js/issues/3575\r\n\t\tif (!canvas.style.height && !canvas.style.width) {\r\n\t\t\tcanvas.style.height = height + 'px';\r\n\t\t\tcanvas.style.width = width + 'px';\r\n\t\t}\r\n\t};\r\n\t// -- Canvas methods\r\n\thelpers$1.fontString = function(pixelSize, fontStyle, fontFamily) {\r\n\t\treturn fontStyle + ' ' + pixelSize + 'px ' + fontFamily;\r\n\t};\r\n\thelpers$1.longestText = function(ctx, font, arrayOfThings, cache) {\r\n\t\tcache = cache || {};\r\n\t\tvar data = cache.data = cache.data || {};\r\n\t\tvar gc = cache.garbageCollect = cache.garbageCollect || [];\r\n\r\n\t\tif (cache.font !== font) {\r\n\t\t\tdata = cache.data = {};\r\n\t\t\tgc = cache.garbageCollect = [];\r\n\t\t\tcache.font = font;\r\n\t\t}\r\n\r\n\t\tctx.font = font;\r\n\t\tvar longest = 0;\r\n\t\tvar ilen = arrayOfThings.length;\r\n\t\tvar i, j, jlen, thing, nestedThing;\r\n\t\tfor (i = 0; i < ilen; i++) {\r\n\t\t\tthing = arrayOfThings[i];\r\n\r\n\t\t\t// Undefined strings and arrays should not be measured\r\n\t\t\tif (thing !== undefined && thing !== null && helpers$1.isArray(thing) !== true) {\r\n\t\t\t\tlongest = helpers$1.measureText(ctx, data, gc, longest, thing);\r\n\t\t\t} else if (helpers$1.isArray(thing)) {\r\n\t\t\t\t// if it is an array lets measure each element\r\n\t\t\t\t// to do maybe simplify this function a bit so we can do this more recursively?\r\n\t\t\t\tfor (j = 0, jlen = thing.length; j < jlen; j++) {\r\n\t\t\t\t\tnestedThing = thing[j];\r\n\t\t\t\t\t// Undefined strings and arrays should not be measured\r\n\t\t\t\t\tif (nestedThing !== undefined && nestedThing !== null && !helpers$1.isArray(nestedThing)) {\r\n\t\t\t\t\t\tlongest = helpers$1.measureText(ctx, data, gc, longest, nestedThing);\r\n\t\t\t\t\t}\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\tvar gcLen = gc.length / 2;\r\n\t\tif (gcLen > arrayOfThings.length) {\r\n\t\t\tfor (i = 0; i < gcLen; i++) {\r\n\t\t\t\tdelete data[gc[i]];\r\n\t\t\t}\r\n\t\t\tgc.splice(0, gcLen);\r\n\t\t}\r\n\t\treturn longest;\r\n\t};\r\n\thelpers$1.measureText = function(ctx, data, gc, longest, string) {\r\n\t\tvar textWidth = data[string];\r\n\t\tif (!textWidth) {\r\n\t\t\ttextWidth = data[string] = ctx.measureText(string).width;\r\n\t\t\tgc.push(string);\r\n\t\t}\r\n\t\tif (textWidth > longest) {\r\n\t\t\tlongest = textWidth;\r\n\t\t}\r\n\t\treturn longest;\r\n\t};\r\n\r\n\t/**\r\n\t * @deprecated\r\n\t */\r\n\thelpers$1.numberOfLabelLines = function(arrayOfThings) {\r\n\t\tvar numberOfLines = 1;\r\n\t\thelpers$1.each(arrayOfThings, function(thing) {\r\n\t\t\tif (helpers$1.isArray(thing)) {\r\n\t\t\t\tif (thing.length > numberOfLines) {\r\n\t\t\t\t\tnumberOfLines = thing.length;\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t});\r\n\t\treturn numberOfLines;\r\n\t};\r\n\r\n\thelpers$1.color = !chartjsColor ?\r\n\t\tfunction(value) {\r\n\t\t\tconsole.error('Color.js not found!');\r\n\t\t\treturn value;\r\n\t\t} :\r\n\t\tfunction(value) {\r\n\t\t\t/* global CanvasGradient */\r\n\t\t\tif (value instanceof CanvasGradient) {\r\n\t\t\t\tvalue = core_defaults.global.defaultColor;\r\n\t\t\t}\r\n\r\n\t\t\treturn chartjsColor(value);\r\n\t\t};\r\n\r\n\thelpers$1.getHoverColor = function(colorValue) {\r\n\t\t/* global CanvasPattern */\r\n\t\treturn (colorValue instanceof CanvasPattern || colorValue instanceof CanvasGradient) ?\r\n\t\t\tcolorValue :\r\n\t\t\thelpers$1.color(colorValue).saturate(0.5).darken(0.1).rgbString();\r\n\t};\r\n};\n\nfunction abstract() {\r\n\tthrow new Error(\r\n\t\t'This method is not implemented: either no adapter can ' +\r\n\t\t'be found or an incomplete integration was provided.'\r\n\t);\r\n}\r\n\r\n/**\r\n * Date adapter (current used by the time scale)\r\n * @namespace Chart._adapters._date\r\n * @memberof Chart._adapters\r\n * @private\r\n */\r\n\r\n/**\r\n * Currently supported unit string values.\r\n * @typedef {('millisecond'|'second'|'minute'|'hour'|'day'|'week'|'month'|'quarter'|'year')}\r\n * @memberof Chart._adapters._date\r\n * @name Unit\r\n */\r\n\r\n/**\r\n * @class\r\n */\r\nfunction DateAdapter(options) {\r\n\tthis.options = options || {};\r\n}\r\n\r\nhelpers$1.extend(DateAdapter.prototype, /** @lends DateAdapter */ {\r\n\t/**\r\n\t * Returns a map of time formats for the supported formatting units defined\r\n\t * in Unit as well as 'datetime' representing a detailed date/time string.\r\n\t * @returns {{string: string}}\r\n\t */\r\n\tformats: abstract,\r\n\r\n\t/**\r\n\t * Parses the given `value` and return the associated timestamp.\r\n\t * @param {any} value - the value to parse (usually comes from the data)\r\n\t * @param {string} [format] - the expected data format\r\n\t * @returns {(number|null)}\r\n\t * @function\r\n\t */\r\n\tparse: abstract,\r\n\r\n\t/**\r\n\t * Returns the formatted date in the specified `format` for a given `timestamp`.\r\n\t * @param {number} timestamp - the timestamp to format\r\n\t * @param {string} format - the date/time token\r\n\t * @return {string}\r\n\t * @function\r\n\t */\r\n\tformat: abstract,\r\n\r\n\t/**\r\n\t * Adds the specified `amount` of `unit` to the given `timestamp`.\r\n\t * @param {number} timestamp - the input timestamp\r\n\t * @param {number} amount - the amount to add\r\n\t * @param {Unit} unit - the unit as string\r\n\t * @return {number}\r\n\t * @function\r\n\t */\r\n\tadd: abstract,\r\n\r\n\t/**\r\n\t * Returns the number of `unit` between the given timestamps.\r\n\t * @param {number} max - the input timestamp (reference)\r\n\t * @param {number} min - the timestamp to substract\r\n\t * @param {Unit} unit - the unit as string\r\n\t * @return {number}\r\n\t * @function\r\n\t */\r\n\tdiff: abstract,\r\n\r\n\t/**\r\n\t * Returns start of `unit` for the given `timestamp`.\r\n\t * @param {number} timestamp - the input timestamp\r\n\t * @param {Unit} unit - the unit as string\r\n\t * @param {number} [weekday] - the ISO day of the week with 1 being Monday\r\n\t * and 7 being Sunday (only needed if param *unit* is `isoWeek`).\r\n\t * @function\r\n\t */\r\n\tstartOf: abstract,\r\n\r\n\t/**\r\n\t * Returns end of `unit` for the given `timestamp`.\r\n\t * @param {number} timestamp - the input timestamp\r\n\t * @param {Unit} unit - the unit as string\r\n\t * @function\r\n\t */\r\n\tendOf: abstract,\r\n\r\n\t// DEPRECATIONS\r\n\r\n\t/**\r\n\t * Provided for backward compatibility for scale.getValueForPixel(),\r\n\t * this method should be overridden only by the moment adapter.\r\n\t * @deprecated since version 2.8.0\r\n\t * @todo remove at version 3\r\n\t * @private\r\n\t */\r\n\t_create: function(value) {\r\n\t\treturn value;\r\n\t}\r\n});\r\n\r\nDateAdapter.override = function(members) {\r\n\thelpers$1.extend(DateAdapter.prototype, members);\r\n};\r\n\r\nvar _date = DateAdapter;\n\nvar core_adapters = {\n\t_date: _date\n};\n\n/**\r\n * Namespace to hold static tick generation functions\r\n * @namespace Chart.Ticks\r\n */\r\nvar core_ticks = {\r\n\t/**\r\n\t * Namespace to hold formatters for different types of ticks\r\n\t * @namespace Chart.Ticks.formatters\r\n\t */\r\n\tformatters: {\r\n\t\t/**\r\n\t\t * Formatter for value labels\r\n\t\t * @method Chart.Ticks.formatters.values\r\n\t\t * @param value the value to display\r\n\t\t * @return {string|string[]} the label to display\r\n\t\t */\r\n\t\tvalues: function(value) {\r\n\t\t\treturn helpers$1.isArray(value) ? value : '' + value;\r\n\t\t},\r\n\r\n\t\t/**\r\n\t\t * Formatter for linear numeric ticks\r\n\t\t * @method Chart.Ticks.formatters.linear\r\n\t\t * @param tickValue {number} the value to be formatted\r\n\t\t * @param index {number} the position of the tickValue parameter in the ticks array\r\n\t\t * @param ticks {number[]} the list of ticks being converted\r\n\t\t * @return {string} string representation of the tickValue parameter\r\n\t\t */\r\n\t\tlinear: function(tickValue, index, ticks) {\r\n\t\t\t// If we have lots of ticks, don't use the ones\r\n\t\t\tvar delta = ticks.length > 3 ? ticks[2] - ticks[1] : ticks[1] - ticks[0];\r\n\r\n\t\t\t// If we have a number like 2.5 as the delta, figure out how many decimal places we need\r\n\t\t\tif (Math.abs(delta) > 1) {\r\n\t\t\t\tif (tickValue !== Math.floor(tickValue)) {\r\n\t\t\t\t\t// not an integer\r\n\t\t\t\t\tdelta = tickValue - Math.floor(tickValue);\r\n\t\t\t\t}\r\n\t\t\t}\r\n\r\n\t\t\tvar logDelta = helpers$1.log10(Math.abs(delta));\r\n\t\t\tvar tickString = '';\r\n\r\n\t\t\tif (tickValue !== 0) {\r\n\t\t\t\tvar maxTick = Math.max(Math.abs(ticks[0]), Math.abs(ticks[ticks.length - 1]));\r\n\t\t\t\tif (maxTick < 1e-4) { // all ticks are small numbers; use scientific notation\r\n\t\t\t\t\tvar logTick = helpers$1.log10(Math.abs(tickValue));\r\n\t\t\t\t\tvar numExponential = Math.floor(logTick) - Math.floor(logDelta);\r\n\t\t\t\t\tnumExponential = Math.max(Math.min(numExponential, 20), 0);\r\n\t\t\t\t\ttickString = tickValue.toExponential(numExponential);\r\n\t\t\t\t} else {\r\n\t\t\t\t\tvar numDecimal = -1 * Math.floor(logDelta);\r\n\t\t\t\t\tnumDecimal = Math.max(Math.min(numDecimal, 20), 0); // toFixed has a max of 20 decimal places\r\n\t\t\t\t\ttickString = tickValue.toFixed(numDecimal);\r\n\t\t\t\t}\r\n\t\t\t} else {\r\n\t\t\t\ttickString = '0'; // never show decimal places for 0\r\n\t\t\t}\r\n\r\n\t\t\treturn tickString;\r\n\t\t},\r\n\r\n\t\tlogarithmic: function(tickValue, index, ticks) {\r\n\t\t\tvar remain = tickValue / (Math.pow(10, Math.floor(helpers$1.log10(tickValue))));\r\n\r\n\t\t\tif (tickValue === 0) {\r\n\t\t\t\treturn '0';\r\n\t\t\t} else if (remain === 1 || remain === 2 || remain === 5 || index === 0 || index === ticks.length - 1) {\r\n\t\t\t\treturn tickValue.toExponential();\r\n\t\t\t}\r\n\t\t\treturn '';\r\n\t\t}\r\n\t}\r\n};\n\nvar isArray = helpers$1.isArray;\r\nvar isNullOrUndef = helpers$1.isNullOrUndef;\r\nvar valueOrDefault$a = helpers$1.valueOrDefault;\r\nvar valueAtIndexOrDefault = helpers$1.valueAtIndexOrDefault;\r\n\r\ncore_defaults._set('scale', {\r\n\tdisplay: true,\r\n\tposition: 'left',\r\n\toffset: false,\r\n\r\n\t// grid line settings\r\n\tgridLines: {\r\n\t\tdisplay: true,\r\n\t\tcolor: 'rgba(0,0,0,0.1)',\r\n\t\tlineWidth: 1,\r\n\t\tdrawBorder: true,\r\n\t\tdrawOnChartArea: true,\r\n\t\tdrawTicks: true,\r\n\t\ttickMarkLength: 10,\r\n\t\tzeroLineWidth: 1,\r\n\t\tzeroLineColor: 'rgba(0,0,0,0.25)',\r\n\t\tzeroLineBorderDash: [],\r\n\t\tzeroLineBorderDashOffset: 0.0,\r\n\t\toffsetGridLines: false,\r\n\t\tborderDash: [],\r\n\t\tborderDashOffset: 0.0\r\n\t},\r\n\r\n\t// scale label\r\n\tscaleLabel: {\r\n\t\t// display property\r\n\t\tdisplay: false,\r\n\r\n\t\t// actual label\r\n\t\tlabelString: '',\r\n\r\n\t\t// top/bottom padding\r\n\t\tpadding: {\r\n\t\t\ttop: 4,\r\n\t\t\tbottom: 4\r\n\t\t}\r\n\t},\r\n\r\n\t// label settings\r\n\tticks: {\r\n\t\tbeginAtZero: false,\r\n\t\tminRotation: 0,\r\n\t\tmaxRotation: 50,\r\n\t\tmirror: false,\r\n\t\tpadding: 0,\r\n\t\treverse: false,\r\n\t\tdisplay: true,\r\n\t\tautoSkip: true,\r\n\t\tautoSkipPadding: 0,\r\n\t\tlabelOffset: 0,\r\n\t\t// We pass through arrays to be rendered as multiline labels, we convert Others to strings here.\r\n\t\tcallback: core_ticks.formatters.values,\r\n\t\tminor: {},\r\n\t\tmajor: {}\r\n\t}\r\n});\r\n\r\n/** Returns a new array containing numItems from arr */\r\nfunction sample(arr, numItems) {\r\n\tvar result = [];\r\n\tvar increment = arr.length / numItems;\r\n\tvar i = 0;\r\n\tvar len = arr.length;\r\n\r\n\tfor (; i < len; i += increment) {\r\n\t\tresult.push(arr[Math.floor(i)]);\r\n\t}\r\n\treturn result;\r\n}\r\n\r\nfunction getPixelForGridLine(scale, index, offsetGridLines) {\r\n\tvar length = scale.getTicks().length;\r\n\tvar validIndex = Math.min(index, length - 1);\r\n\tvar lineValue = scale.getPixelForTick(validIndex);\r\n\tvar start = scale._startPixel;\r\n\tvar end = scale._endPixel;\r\n\tvar epsilon = 1e-6; // 1e-6 is margin in pixels for accumulated error.\r\n\tvar offset;\r\n\r\n\tif (offsetGridLines) {\r\n\t\tif (length === 1) {\r\n\t\t\toffset = Math.max(lineValue - start, end - lineValue);\r\n\t\t} else if (index === 0) {\r\n\t\t\toffset = (scale.getPixelForTick(1) - lineValue) / 2;\r\n\t\t} else {\r\n\t\t\toffset = (lineValue - scale.getPixelForTick(validIndex - 1)) / 2;\r\n\t\t}\r\n\t\tlineValue += validIndex < index ? offset : -offset;\r\n\r\n\t\t// Return undefined if the pixel is out of the range\r\n\t\tif (lineValue < start - epsilon || lineValue > end + epsilon) {\r\n\t\t\treturn;\r\n\t\t}\r\n\t}\r\n\treturn lineValue;\r\n}\r\n\r\nfunction garbageCollect(caches, length) {\r\n\thelpers$1.each(caches, function(cache) {\r\n\t\tvar gc = cache.gc;\r\n\t\tvar gcLen = gc.length / 2;\r\n\t\tvar i;\r\n\t\tif (gcLen > length) {\r\n\t\t\tfor (i = 0; i < gcLen; ++i) {\r\n\t\t\t\tdelete cache.data[gc[i]];\r\n\t\t\t}\r\n\t\t\tgc.splice(0, gcLen);\r\n\t\t}\r\n\t});\r\n}\r\n\r\n/**\r\n * Returns {width, height, offset} objects for the first, last, widest, highest tick\r\n * labels where offset indicates the anchor point offset from the top in pixels.\r\n */\r\nfunction computeLabelSizes(ctx, tickFonts, ticks, caches) {\r\n\tvar length = ticks.length;\r\n\tvar widths = [];\r\n\tvar heights = [];\r\n\tvar offsets = [];\r\n\tvar widestLabelSize = 0;\r\n\tvar highestLabelSize = 0;\r\n\tvar i, j, jlen, label, tickFont, fontString, cache, lineHeight, width, height, nestedLabel, widest, highest;\r\n\r\n\tfor (i = 0; i < length; ++i) {\r\n\t\tlabel = ticks[i].label;\r\n\t\ttickFont = ticks[i].major ? tickFonts.major : tickFonts.minor;\r\n\t\tctx.font = fontString = tickFont.string;\r\n\t\tcache = caches[fontString] = caches[fontString] || {data: {}, gc: []};\r\n\t\tlineHeight = tickFont.lineHeight;\r\n\t\twidth = height = 0;\r\n\t\t// Undefined labels and arrays should not be measured\r\n\t\tif (!isNullOrUndef(label) && !isArray(label)) {\r\n\t\t\twidth = helpers$1.measureText(ctx, cache.data, cache.gc, width, label);\r\n\t\t\theight = lineHeight;\r\n\t\t} else if (isArray(label)) {\r\n\t\t\t// if it is an array let's measure each element\r\n\t\t\tfor (j = 0, jlen = label.length; j < jlen; ++j) {\r\n\t\t\t\tnestedLabel = label[j];\r\n\t\t\t\t// Undefined labels and arrays should not be measured\r\n\t\t\t\tif (!isNullOrUndef(nestedLabel) && !isArray(nestedLabel)) {\r\n\t\t\t\t\twidth = helpers$1.measureText(ctx, cache.data, cache.gc, width, nestedLabel);\r\n\t\t\t\t\theight += lineHeight;\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t}\r\n\t\twidths.push(width);\r\n\t\theights.push(height);\r\n\t\toffsets.push(lineHeight / 2);\r\n\t\twidestLabelSize = Math.max(width, widestLabelSize);\r\n\t\thighestLabelSize = Math.max(height, highestLabelSize);\r\n\t}\r\n\tgarbageCollect(caches, length);\r\n\r\n\twidest = widths.indexOf(widestLabelSize);\r\n\thighest = heights.indexOf(highestLabelSize);\r\n\r\n\tfunction valueAt(idx) {\r\n\t\treturn {\r\n\t\t\twidth: widths[idx] || 0,\r\n\t\t\theight: heights[idx] || 0,\r\n\t\t\toffset: offsets[idx] || 0\r\n\t\t};\r\n\t}\r\n\r\n\treturn {\r\n\t\tfirst: valueAt(0),\r\n\t\tlast: valueAt(length - 1),\r\n\t\twidest: valueAt(widest),\r\n\t\thighest: valueAt(highest)\r\n\t};\r\n}\r\n\r\nfunction getTickMarkLength(options) {\r\n\treturn options.drawTicks ? options.tickMarkLength : 0;\r\n}\r\n\r\nfunction getScaleLabelHeight(options) {\r\n\tvar font, padding;\r\n\r\n\tif (!options.display) {\r\n\t\treturn 0;\r\n\t}\r\n\r\n\tfont = helpers$1.options._parseFont(options);\r\n\tpadding = helpers$1.options.toPadding(options.padding);\r\n\r\n\treturn font.lineHeight + padding.height;\r\n}\r\n\r\nfunction parseFontOptions(options, nestedOpts) {\r\n\treturn helpers$1.extend(helpers$1.options._parseFont({\r\n\t\tfontFamily: valueOrDefault$a(nestedOpts.fontFamily, options.fontFamily),\r\n\t\tfontSize: valueOrDefault$a(nestedOpts.fontSize, options.fontSize),\r\n\t\tfontStyle: valueOrDefault$a(nestedOpts.fontStyle, options.fontStyle),\r\n\t\tlineHeight: valueOrDefault$a(nestedOpts.lineHeight, options.lineHeight)\r\n\t}), {\r\n\t\tcolor: helpers$1.options.resolve([nestedOpts.fontColor, options.fontColor, core_defaults.global.defaultFontColor])\r\n\t});\r\n}\r\n\r\nfunction parseTickFontOptions(options) {\r\n\tvar minor = parseFontOptions(options, options.minor);\r\n\tvar major = options.major.enabled ? parseFontOptions(options, options.major) : minor;\r\n\r\n\treturn {minor: minor, major: major};\r\n}\r\n\r\nfunction nonSkipped(ticksToFilter) {\r\n\tvar filtered = [];\r\n\tvar item, index, len;\r\n\tfor (index = 0, len = ticksToFilter.length; index < len; ++index) {\r\n\t\titem = ticksToFilter[index];\r\n\t\tif (typeof item._index !== 'undefined') {\r\n\t\t\tfiltered.push(item);\r\n\t\t}\r\n\t}\r\n\treturn filtered;\r\n}\r\n\r\nfunction getEvenSpacing(arr) {\r\n\tvar len = arr.length;\r\n\tvar i, diff;\r\n\r\n\tif (len < 2) {\r\n\t\treturn false;\r\n\t}\r\n\r\n\tfor (diff = arr[0], i = 1; i < len; ++i) {\r\n\t\tif (arr[i] - arr[i - 1] !== diff) {\r\n\t\t\treturn false;\r\n\t\t}\r\n\t}\r\n\treturn diff;\r\n}\r\n\r\nfunction calculateSpacing(majorIndices, ticks, axisLength, ticksLimit) {\r\n\tvar evenMajorSpacing = getEvenSpacing(majorIndices);\r\n\tvar spacing = (ticks.length - 1) / ticksLimit;\r\n\tvar factors, factor, i, ilen;\r\n\r\n\t// If the major ticks are evenly spaced apart, place the minor ticks\r\n\t// so that they divide the major ticks into even chunks\r\n\tif (!evenMajorSpacing) {\r\n\t\treturn Math.max(spacing, 1);\r\n\t}\r\n\r\n\tfactors = helpers$1.math._factorize(evenMajorSpacing);\r\n\tfor (i = 0, ilen = factors.length - 1; i < ilen; i++) {\r\n\t\tfactor = factors[i];\r\n\t\tif (factor > spacing) {\r\n\t\t\treturn factor;\r\n\t\t}\r\n\t}\r\n\treturn Math.max(spacing, 1);\r\n}\r\n\r\nfunction getMajorIndices(ticks) {\r\n\tvar result = [];\r\n\tvar i, ilen;\r\n\tfor (i = 0, ilen = ticks.length; i < ilen; i++) {\r\n\t\tif (ticks[i].major) {\r\n\t\t\tresult.push(i);\r\n\t\t}\r\n\t}\r\n\treturn result;\r\n}\r\n\r\nfunction skipMajors(ticks, majorIndices, spacing) {\r\n\tvar count = 0;\r\n\tvar next = majorIndices[0];\r\n\tvar i, tick;\r\n\r\n\tspacing = Math.ceil(spacing);\r\n\tfor (i = 0; i < ticks.length; i++) {\r\n\t\ttick = ticks[i];\r\n\t\tif (i === next) {\r\n\t\t\ttick._index = i;\r\n\t\t\tcount++;\r\n\t\t\tnext = majorIndices[count * spacing];\r\n\t\t} else {\r\n\t\t\tdelete tick.label;\r\n\t\t}\r\n\t}\r\n}\r\n\r\nfunction skip(ticks, spacing, majorStart, majorEnd) {\r\n\tvar start = valueOrDefault$a(majorStart, 0);\r\n\tvar end = Math.min(valueOrDefault$a(majorEnd, ticks.length), ticks.length);\r\n\tvar count = 0;\r\n\tvar length, i, tick, next;\r\n\r\n\tspacing = Math.ceil(spacing);\r\n\tif (majorEnd) {\r\n\t\tlength = majorEnd - majorStart;\r\n\t\tspacing = length / Math.floor(length / spacing);\r\n\t}\r\n\r\n\tnext = start;\r\n\r\n\twhile (next < 0) {\r\n\t\tcount++;\r\n\t\tnext = Math.round(start + count * spacing);\r\n\t}\r\n\r\n\tfor (i = Math.max(start, 0); i < end; i++) {\r\n\t\ttick = ticks[i];\r\n\t\tif (i === next) {\r\n\t\t\ttick._index = i;\r\n\t\t\tcount++;\r\n\t\t\tnext = Math.round(start + count * spacing);\r\n\t\t} else {\r\n\t\t\tdelete tick.label;\r\n\t\t}\r\n\t}\r\n}\r\n\r\nvar Scale = core_element.extend({\r\n\r\n\tzeroLineIndex: 0,\r\n\r\n\t/**\r\n\t * Get the padding needed for the scale\r\n\t * @method getPadding\r\n\t * @private\r\n\t * @returns {Padding} the necessary padding\r\n\t */\r\n\tgetPadding: function() {\r\n\t\tvar me = this;\r\n\t\treturn {\r\n\t\t\tleft: me.paddingLeft || 0,\r\n\t\t\ttop: me.paddingTop || 0,\r\n\t\t\tright: me.paddingRight || 0,\r\n\t\t\tbottom: me.paddingBottom || 0\r\n\t\t};\r\n\t},\r\n\r\n\t/**\r\n\t * Returns the scale tick objects ({label, major})\r\n\t * @since 2.7\r\n\t */\r\n\tgetTicks: function() {\r\n\t\treturn this._ticks;\r\n\t},\r\n\r\n\t/**\r\n\t* @private\r\n\t*/\r\n\t_getLabels: function() {\r\n\t\tvar data = this.chart.data;\r\n\t\treturn this.options.labels || (this.isHorizontal() ? data.xLabels : data.yLabels) || data.labels || [];\r\n\t},\r\n\r\n\t// These methods are ordered by lifecyle. Utilities then follow.\r\n\t// Any function defined here is inherited by all scale types.\r\n\t// Any function can be extended by the scale type\r\n\r\n\t/**\r\n\t * Provided for backward compatibility, not available anymore\r\n\t * @function Chart.Scale.mergeTicksOptions\r\n\t * @deprecated since version 2.8.0\r\n\t * @todo remove at version 3\r\n\t */\r\n\tmergeTicksOptions: function() {\r\n\t\t// noop\r\n\t},\r\n\r\n\tbeforeUpdate: function() {\r\n\t\thelpers$1.callback(this.options.beforeUpdate, [this]);\r\n\t},\r\n\r\n\t/**\r\n\t * @param {number} maxWidth - the max width in pixels\r\n\t * @param {number} maxHeight - the max height in pixels\r\n\t * @param {object} margins - the space between the edge of the other scales and edge of the chart\r\n\t *   This space comes from two sources:\r\n\t *     - padding - space that's required to show the labels at the edges of the scale\r\n\t *     - thickness of scales or legends in another orientation\r\n\t */\r\n\tupdate: function(maxWidth, maxHeight, margins) {\r\n\t\tvar me = this;\r\n\t\tvar tickOpts = me.options.ticks;\r\n\t\tvar sampleSize = tickOpts.sampleSize;\r\n\t\tvar i, ilen, labels, ticks, samplingEnabled;\r\n\r\n\t\t// Update Lifecycle - Probably don't want to ever extend or overwrite this function ;)\r\n\t\tme.beforeUpdate();\r\n\r\n\t\t// Absorb the master measurements\r\n\t\tme.maxWidth = maxWidth;\r\n\t\tme.maxHeight = maxHeight;\r\n\t\tme.margins = helpers$1.extend({\r\n\t\t\tleft: 0,\r\n\t\t\tright: 0,\r\n\t\t\ttop: 0,\r\n\t\t\tbottom: 0\r\n\t\t}, margins);\r\n\r\n\t\tme._ticks = null;\r\n\t\tme.ticks = null;\r\n\t\tme._labelSizes = null;\r\n\t\tme._maxLabelLines = 0;\r\n\t\tme.longestLabelWidth = 0;\r\n\t\tme.longestTextCache = me.longestTextCache || {};\r\n\t\tme._gridLineItems = null;\r\n\t\tme._labelItems = null;\r\n\r\n\t\t// Dimensions\r\n\t\tme.beforeSetDimensions();\r\n\t\tme.setDimensions();\r\n\t\tme.afterSetDimensions();\r\n\r\n\t\t// Data min/max\r\n\t\tme.beforeDataLimits();\r\n\t\tme.determineDataLimits();\r\n\t\tme.afterDataLimits();\r\n\r\n\t\t// Ticks - `this.ticks` is now DEPRECATED!\r\n\t\t// Internal ticks are now stored as objects in the PRIVATE `this._ticks` member\r\n\t\t// and must not be accessed directly from outside this class. `this.ticks` being\r\n\t\t// around for long time and not marked as private, we can't change its structure\r\n\t\t// without unexpected breaking changes. If you need to access the scale ticks,\r\n\t\t// use scale.getTicks() instead.\r\n\r\n\t\tme.beforeBuildTicks();\r\n\r\n\t\t// New implementations should return an array of objects but for BACKWARD COMPAT,\r\n\t\t// we still support no return (`this.ticks` internally set by calling this method).\r\n\t\tticks = me.buildTicks() || [];\r\n\r\n\t\t// Allow modification of ticks in callback.\r\n\t\tticks = me.afterBuildTicks(ticks) || ticks;\r\n\r\n\t\t// Ensure ticks contains ticks in new tick format\r\n\t\tif ((!ticks || !ticks.length) && me.ticks) {\r\n\t\t\tticks = [];\r\n\t\t\tfor (i = 0, ilen = me.ticks.length; i < ilen; ++i) {\r\n\t\t\t\tticks.push({\r\n\t\t\t\t\tvalue: me.ticks[i],\r\n\t\t\t\t\tmajor: false\r\n\t\t\t\t});\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\tme._ticks = ticks;\r\n\r\n\t\t// Compute tick rotation and fit using a sampled subset of labels\r\n\t\t// We generally don't need to compute the size of every single label for determining scale size\r\n\t\tsamplingEnabled = sampleSize < ticks.length;\r\n\t\tlabels = me._convertTicksToLabels(samplingEnabled ? sample(ticks, sampleSize) : ticks);\r\n\r\n\t\t// _configure is called twice, once here, once from core.controller.updateLayout.\r\n\t\t// Here we haven't been positioned yet, but dimensions are correct.\r\n\t\t// Variables set in _configure are needed for calculateTickRotation, and\r\n\t\t// it's ok that coordinates are not correct there, only dimensions matter.\r\n\t\tme._configure();\r\n\r\n\t\t// Tick Rotation\r\n\t\tme.beforeCalculateTickRotation();\r\n\t\tme.calculateTickRotation();\r\n\t\tme.afterCalculateTickRotation();\r\n\r\n\t\tme.beforeFit();\r\n\t\tme.fit();\r\n\t\tme.afterFit();\r\n\r\n\t\t// Auto-skip\r\n\t\tme._ticksToDraw = tickOpts.display && (tickOpts.autoSkip || tickOpts.source === 'auto') ? me._autoSkip(ticks) : ticks;\r\n\r\n\t\tif (samplingEnabled) {\r\n\t\t\t// Generate labels using all non-skipped ticks\r\n\t\t\tlabels = me._convertTicksToLabels(me._ticksToDraw);\r\n\t\t}\r\n\r\n\t\tme.ticks = labels;   // BACKWARD COMPATIBILITY\r\n\r\n\t\t// IMPORTANT: after this point, we consider that `this.ticks` will NEVER change!\r\n\r\n\t\tme.afterUpdate();\r\n\r\n\t\t// TODO(v3): remove minSize as a public property and return value from all layout boxes. It is unused\r\n\t\t// make maxWidth and maxHeight private\r\n\t\treturn me.minSize;\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_configure: function() {\r\n\t\tvar me = this;\r\n\t\tvar reversePixels = me.options.ticks.reverse;\r\n\t\tvar startPixel, endPixel;\r\n\r\n\t\tif (me.isHorizontal()) {\r\n\t\t\tstartPixel = me.left;\r\n\t\t\tendPixel = me.right;\r\n\t\t} else {\r\n\t\t\tstartPixel = me.top;\r\n\t\t\tendPixel = me.bottom;\r\n\t\t\t// by default vertical scales are from bottom to top, so pixels are reversed\r\n\t\t\treversePixels = !reversePixels;\r\n\t\t}\r\n\t\tme._startPixel = startPixel;\r\n\t\tme._endPixel = endPixel;\r\n\t\tme._reversePixels = reversePixels;\r\n\t\tme._length = endPixel - startPixel;\r\n\t},\r\n\r\n\tafterUpdate: function() {\r\n\t\thelpers$1.callback(this.options.afterUpdate, [this]);\r\n\t},\r\n\r\n\t//\r\n\r\n\tbeforeSetDimensions: function() {\r\n\t\thelpers$1.callback(this.options.beforeSetDimensions, [this]);\r\n\t},\r\n\tsetDimensions: function() {\r\n\t\tvar me = this;\r\n\t\t// Set the unconstrained dimension before label rotation\r\n\t\tif (me.isHorizontal()) {\r\n\t\t\t// Reset position before calculating rotation\r\n\t\t\tme.width = me.maxWidth;\r\n\t\t\tme.left = 0;\r\n\t\t\tme.right = me.width;\r\n\t\t} else {\r\n\t\t\tme.height = me.maxHeight;\r\n\r\n\t\t\t// Reset position before calculating rotation\r\n\t\t\tme.top = 0;\r\n\t\t\tme.bottom = me.height;\r\n\t\t}\r\n\r\n\t\t// Reset padding\r\n\t\tme.paddingLeft = 0;\r\n\t\tme.paddingTop = 0;\r\n\t\tme.paddingRight = 0;\r\n\t\tme.paddingBottom = 0;\r\n\t},\r\n\tafterSetDimensions: function() {\r\n\t\thelpers$1.callback(this.options.afterSetDimensions, [this]);\r\n\t},\r\n\r\n\t// Data limits\r\n\tbeforeDataLimits: function() {\r\n\t\thelpers$1.callback(this.options.beforeDataLimits, [this]);\r\n\t},\r\n\tdetermineDataLimits: helpers$1.noop,\r\n\tafterDataLimits: function() {\r\n\t\thelpers$1.callback(this.options.afterDataLimits, [this]);\r\n\t},\r\n\r\n\t//\r\n\tbeforeBuildTicks: function() {\r\n\t\thelpers$1.callback(this.options.beforeBuildTicks, [this]);\r\n\t},\r\n\tbuildTicks: helpers$1.noop,\r\n\tafterBuildTicks: function(ticks) {\r\n\t\tvar me = this;\r\n\t\t// ticks is empty for old axis implementations here\r\n\t\tif (isArray(ticks) && ticks.length) {\r\n\t\t\treturn helpers$1.callback(me.options.afterBuildTicks, [me, ticks]);\r\n\t\t}\r\n\t\t// Support old implementations (that modified `this.ticks` directly in buildTicks)\r\n\t\tme.ticks = helpers$1.callback(me.options.afterBuildTicks, [me, me.ticks]) || me.ticks;\r\n\t\treturn ticks;\r\n\t},\r\n\r\n\tbeforeTickToLabelConversion: function() {\r\n\t\thelpers$1.callback(this.options.beforeTickToLabelConversion, [this]);\r\n\t},\r\n\tconvertTicksToLabels: function() {\r\n\t\tvar me = this;\r\n\t\t// Convert ticks to strings\r\n\t\tvar tickOpts = me.options.ticks;\r\n\t\tme.ticks = me.ticks.map(tickOpts.userCallback || tickOpts.callback, this);\r\n\t},\r\n\tafterTickToLabelConversion: function() {\r\n\t\thelpers$1.callback(this.options.afterTickToLabelConversion, [this]);\r\n\t},\r\n\r\n\t//\r\n\r\n\tbeforeCalculateTickRotation: function() {\r\n\t\thelpers$1.callback(this.options.beforeCalculateTickRotation, [this]);\r\n\t},\r\n\tcalculateTickRotation: function() {\r\n\t\tvar me = this;\r\n\t\tvar options = me.options;\r\n\t\tvar tickOpts = options.ticks;\r\n\t\tvar numTicks = me.getTicks().length;\r\n\t\tvar minRotation = tickOpts.minRotation || 0;\r\n\t\tvar maxRotation = tickOpts.maxRotation;\r\n\t\tvar labelRotation = minRotation;\r\n\t\tvar labelSizes, maxLabelWidth, maxLabelHeight, maxWidth, tickWidth, maxHeight, maxLabelDiagonal;\r\n\r\n\t\tif (!me._isVisible() || !tickOpts.display || minRotation >= maxRotation || numTicks <= 1 || !me.isHorizontal()) {\r\n\t\t\tme.labelRotation = minRotation;\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tlabelSizes = me._getLabelSizes();\r\n\t\tmaxLabelWidth = labelSizes.widest.width;\r\n\t\tmaxLabelHeight = labelSizes.highest.height - labelSizes.highest.offset;\r\n\r\n\t\t// Estimate the width of each grid based on the canvas width, the maximum\r\n\t\t// label width and the number of tick intervals\r\n\t\tmaxWidth = Math.min(me.maxWidth, me.chart.width - maxLabelWidth);\r\n\t\ttickWidth = options.offset ? me.maxWidth / numTicks : maxWidth / (numTicks - 1);\r\n\r\n\t\t// Allow 3 pixels x2 padding either side for label readability\r\n\t\tif (maxLabelWidth + 6 > tickWidth) {\r\n\t\t\ttickWidth = maxWidth / (numTicks - (options.offset ? 0.5 : 1));\r\n\t\t\tmaxHeight = me.maxHeight - getTickMarkLength(options.gridLines)\r\n\t\t\t\t- tickOpts.padding - getScaleLabelHeight(options.scaleLabel);\r\n\t\t\tmaxLabelDiagonal = Math.sqrt(maxLabelWidth * maxLabelWidth + maxLabelHeight * maxLabelHeight);\r\n\t\t\tlabelRotation = helpers$1.toDegrees(Math.min(\r\n\t\t\t\tMath.asin(Math.min((labelSizes.highest.height + 6) / tickWidth, 1)),\r\n\t\t\t\tMath.asin(Math.min(maxHeight / maxLabelDiagonal, 1)) - Math.asin(maxLabelHeight / maxLabelDiagonal)\r\n\t\t\t));\r\n\t\t\tlabelRotation = Math.max(minRotation, Math.min(maxRotation, labelRotation));\r\n\t\t}\r\n\r\n\t\tme.labelRotation = labelRotation;\r\n\t},\r\n\tafterCalculateTickRotation: function() {\r\n\t\thelpers$1.callback(this.options.afterCalculateTickRotation, [this]);\r\n\t},\r\n\r\n\t//\r\n\r\n\tbeforeFit: function() {\r\n\t\thelpers$1.callback(this.options.beforeFit, [this]);\r\n\t},\r\n\tfit: function() {\r\n\t\tvar me = this;\r\n\t\t// Reset\r\n\t\tvar minSize = me.minSize = {\r\n\t\t\twidth: 0,\r\n\t\t\theight: 0\r\n\t\t};\r\n\r\n\t\tvar chart = me.chart;\r\n\t\tvar opts = me.options;\r\n\t\tvar tickOpts = opts.ticks;\r\n\t\tvar scaleLabelOpts = opts.scaleLabel;\r\n\t\tvar gridLineOpts = opts.gridLines;\r\n\t\tvar display = me._isVisible();\r\n\t\tvar isBottom = opts.position === 'bottom';\r\n\t\tvar isHorizontal = me.isHorizontal();\r\n\r\n\t\t// Width\r\n\t\tif (isHorizontal) {\r\n\t\t\tminSize.width = me.maxWidth;\r\n\t\t} else if (display) {\r\n\t\t\tminSize.width = getTickMarkLength(gridLineOpts) + getScaleLabelHeight(scaleLabelOpts);\r\n\t\t}\r\n\r\n\t\t// height\r\n\t\tif (!isHorizontal) {\r\n\t\t\tminSize.height = me.maxHeight; // fill all the height\r\n\t\t} else if (display) {\r\n\t\t\tminSize.height = getTickMarkLength(gridLineOpts) + getScaleLabelHeight(scaleLabelOpts);\r\n\t\t}\r\n\r\n\t\t// Don't bother fitting the ticks if we are not showing the labels\r\n\t\tif (tickOpts.display && display) {\r\n\t\t\tvar tickFonts = parseTickFontOptions(tickOpts);\r\n\t\t\tvar labelSizes = me._getLabelSizes();\r\n\t\t\tvar firstLabelSize = labelSizes.first;\r\n\t\t\tvar lastLabelSize = labelSizes.last;\r\n\t\t\tvar widestLabelSize = labelSizes.widest;\r\n\t\t\tvar highestLabelSize = labelSizes.highest;\r\n\t\t\tvar lineSpace = tickFonts.minor.lineHeight * 0.4;\r\n\t\t\tvar tickPadding = tickOpts.padding;\r\n\r\n\t\t\tif (isHorizontal) {\r\n\t\t\t\t// A horizontal axis is more constrained by the height.\r\n\t\t\t\tvar isRotated = me.labelRotation !== 0;\r\n\t\t\t\tvar angleRadians = helpers$1.toRadians(me.labelRotation);\r\n\t\t\t\tvar cosRotation = Math.cos(angleRadians);\r\n\t\t\t\tvar sinRotation = Math.sin(angleRadians);\r\n\r\n\t\t\t\tvar labelHeight = sinRotation * widestLabelSize.width\r\n\t\t\t\t\t+ cosRotation * (highestLabelSize.height - (isRotated ? highestLabelSize.offset : 0))\r\n\t\t\t\t\t+ (isRotated ? 0 : lineSpace); // padding\r\n\r\n\t\t\t\tminSize.height = Math.min(me.maxHeight, minSize.height + labelHeight + tickPadding);\r\n\r\n\t\t\t\tvar offsetLeft = me.getPixelForTick(0) - me.left;\r\n\t\t\t\tvar offsetRight = me.right - me.getPixelForTick(me.getTicks().length - 1);\r\n\t\t\t\tvar paddingLeft, paddingRight;\r\n\r\n\t\t\t\t// Ensure that our ticks are always inside the canvas. When rotated, ticks are right aligned\r\n\t\t\t\t// which means that the right padding is dominated by the font height\r\n\t\t\t\tif (isRotated) {\r\n\t\t\t\t\tpaddingLeft = isBottom ?\r\n\t\t\t\t\t\tcosRotation * firstLabelSize.width + sinRotation * firstLabelSize.offset :\r\n\t\t\t\t\t\tsinRotation * (firstLabelSize.height - firstLabelSize.offset);\r\n\t\t\t\t\tpaddingRight = isBottom ?\r\n\t\t\t\t\t\tsinRotation * (lastLabelSize.height - lastLabelSize.offset) :\r\n\t\t\t\t\t\tcosRotation * lastLabelSize.width + sinRotation * lastLabelSize.offset;\r\n\t\t\t\t} else {\r\n\t\t\t\t\tpaddingLeft = firstLabelSize.width / 2;\r\n\t\t\t\t\tpaddingRight = lastLabelSize.width / 2;\r\n\t\t\t\t}\r\n\r\n\t\t\t\t// Adjust padding taking into account changes in offsets\r\n\t\t\t\t// and add 3 px to move away from canvas edges\r\n\t\t\t\tme.paddingLeft = Math.max((paddingLeft - offsetLeft) * me.width / (me.width - offsetLeft), 0) + 3;\r\n\t\t\t\tme.paddingRight = Math.max((paddingRight - offsetRight) * me.width / (me.width - offsetRight), 0) + 3;\r\n\t\t\t} else {\r\n\t\t\t\t// A vertical axis is more constrained by the width. Labels are the\r\n\t\t\t\t// dominant factor here, so get that length first and account for padding\r\n\t\t\t\tvar labelWidth = tickOpts.mirror ? 0 :\r\n\t\t\t\t\t// use lineSpace for consistency with horizontal axis\r\n\t\t\t\t\t// tickPadding is not implemented for horizontal\r\n\t\t\t\t\twidestLabelSize.width + tickPadding + lineSpace;\r\n\r\n\t\t\t\tminSize.width = Math.min(me.maxWidth, minSize.width + labelWidth);\r\n\r\n\t\t\t\tme.paddingTop = firstLabelSize.height / 2;\r\n\t\t\t\tme.paddingBottom = lastLabelSize.height / 2;\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\tme.handleMargins();\r\n\r\n\t\tif (isHorizontal) {\r\n\t\t\tme.width = me._length = chart.width - me.margins.left - me.margins.right;\r\n\t\t\tme.height = minSize.height;\r\n\t\t} else {\r\n\t\t\tme.width = minSize.width;\r\n\t\t\tme.height = me._length = chart.height - me.margins.top - me.margins.bottom;\r\n\t\t}\r\n\t},\r\n\r\n\t/**\r\n\t * Handle margins and padding interactions\r\n\t * @private\r\n\t */\r\n\thandleMargins: function() {\r\n\t\tvar me = this;\r\n\t\tif (me.margins) {\r\n\t\t\tme.margins.left = Math.max(me.paddingLeft, me.margins.left);\r\n\t\t\tme.margins.top = Math.max(me.paddingTop, me.margins.top);\r\n\t\t\tme.margins.right = Math.max(me.paddingRight, me.margins.right);\r\n\t\t\tme.margins.bottom = Math.max(me.paddingBottom, me.margins.bottom);\r\n\t\t}\r\n\t},\r\n\r\n\tafterFit: function() {\r\n\t\thelpers$1.callback(this.options.afterFit, [this]);\r\n\t},\r\n\r\n\t// Shared Methods\r\n\tisHorizontal: function() {\r\n\t\tvar pos = this.options.position;\r\n\t\treturn pos === 'top' || pos === 'bottom';\r\n\t},\r\n\tisFullWidth: function() {\r\n\t\treturn this.options.fullWidth;\r\n\t},\r\n\r\n\t// Get the correct value. NaN bad inputs, If the value type is object get the x or y based on whether we are horizontal or not\r\n\tgetRightValue: function(rawValue) {\r\n\t\t// Null and undefined values first\r\n\t\tif (isNullOrUndef(rawValue)) {\r\n\t\t\treturn NaN;\r\n\t\t}\r\n\t\t// isNaN(object) returns true, so make sure NaN is checking for a number; Discard Infinite values\r\n\t\tif ((typeof rawValue === 'number' || rawValue instanceof Number) && !isFinite(rawValue)) {\r\n\t\t\treturn NaN;\r\n\t\t}\r\n\r\n\t\t// If it is in fact an object, dive in one more level\r\n\t\tif (rawValue) {\r\n\t\t\tif (this.isHorizontal()) {\r\n\t\t\t\tif (rawValue.x !== undefined) {\r\n\t\t\t\t\treturn this.getRightValue(rawValue.x);\r\n\t\t\t\t}\r\n\t\t\t} else if (rawValue.y !== undefined) {\r\n\t\t\t\treturn this.getRightValue(rawValue.y);\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\t// Value is good, return it\r\n\t\treturn rawValue;\r\n\t},\r\n\r\n\t_convertTicksToLabels: function(ticks) {\r\n\t\tvar me = this;\r\n\t\tvar labels, i, ilen;\r\n\r\n\t\tme.ticks = ticks.map(function(tick) {\r\n\t\t\treturn tick.value;\r\n\t\t});\r\n\r\n\t\tme.beforeTickToLabelConversion();\r\n\r\n\t\t// New implementations should return the formatted tick labels but for BACKWARD\r\n\t\t// COMPAT, we still support no return (`this.ticks` internally changed by calling\r\n\t\t// this method and supposed to contain only string values).\r\n\t\tlabels = me.convertTicksToLabels(ticks) || me.ticks;\r\n\r\n\t\tme.afterTickToLabelConversion();\r\n\r\n\t\t// BACKWARD COMPAT: synchronize `_ticks` with labels (so potentially `this.ticks`)\r\n\t\tfor (i = 0, ilen = ticks.length; i < ilen; ++i) {\r\n\t\t\tticks[i].label = labels[i];\r\n\t\t}\r\n\r\n\t\treturn labels;\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_getLabelSizes: function() {\r\n\t\tvar me = this;\r\n\t\tvar labelSizes = me._labelSizes;\r\n\r\n\t\tif (!labelSizes) {\r\n\t\t\tme._labelSizes = labelSizes = computeLabelSizes(me.ctx, parseTickFontOptions(me.options.ticks), me.getTicks(), me.longestTextCache);\r\n\t\t\tme.longestLabelWidth = labelSizes.widest.width;\r\n\t\t}\r\n\r\n\t\treturn labelSizes;\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_parseValue: function(value) {\r\n\t\tvar start, end, min, max;\r\n\r\n\t\tif (isArray(value)) {\r\n\t\t\tstart = +this.getRightValue(value[0]);\r\n\t\t\tend = +this.getRightValue(value[1]);\r\n\t\t\tmin = Math.min(start, end);\r\n\t\t\tmax = Math.max(start, end);\r\n\t\t} else {\r\n\t\t\tvalue = +this.getRightValue(value);\r\n\t\t\tstart = undefined;\r\n\t\t\tend = value;\r\n\t\t\tmin = value;\r\n\t\t\tmax = value;\r\n\t\t}\r\n\r\n\t\treturn {\r\n\t\t\tmin: min,\r\n\t\t\tmax: max,\r\n\t\t\tstart: start,\r\n\t\t\tend: end\r\n\t\t};\r\n\t},\r\n\r\n\t/**\r\n\t* @private\r\n\t*/\r\n\t_getScaleLabel: function(rawValue) {\r\n\t\tvar v = this._parseValue(rawValue);\r\n\t\tif (v.start !== undefined) {\r\n\t\t\treturn '[' + v.start + ', ' + v.end + ']';\r\n\t\t}\r\n\r\n\t\treturn +this.getRightValue(rawValue);\r\n\t},\r\n\r\n\t/**\r\n\t * Used to get the value to display in the tooltip for the data at the given index\r\n\t * @param index\r\n\t * @param datasetIndex\r\n\t */\r\n\tgetLabelForIndex: helpers$1.noop,\r\n\r\n\t/**\r\n\t * Returns the location of the given data point. Value can either be an index or a numerical value\r\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\r\n\t * @param value\r\n\t * @param index\r\n\t * @param datasetIndex\r\n\t */\r\n\tgetPixelForValue: helpers$1.noop,\r\n\r\n\t/**\r\n\t * Used to get the data value from a given pixel. This is the inverse of getPixelForValue\r\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\r\n\t * @param pixel\r\n\t */\r\n\tgetValueForPixel: helpers$1.noop,\r\n\r\n\t/**\r\n\t * Returns the location of the tick at the given index\r\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\r\n\t */\r\n\tgetPixelForTick: function(index) {\r\n\t\tvar me = this;\r\n\t\tvar offset = me.options.offset;\r\n\t\tvar numTicks = me._ticks.length;\r\n\t\tvar tickWidth = 1 / Math.max(numTicks - (offset ? 0 : 1), 1);\r\n\r\n\t\treturn index < 0 || index > numTicks - 1\r\n\t\t\t? null\r\n\t\t\t: me.getPixelForDecimal(index * tickWidth + (offset ? tickWidth / 2 : 0));\r\n\t},\r\n\r\n\t/**\r\n\t * Utility for getting the pixel location of a percentage of scale\r\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\r\n\t */\r\n\tgetPixelForDecimal: function(decimal) {\r\n\t\tvar me = this;\r\n\r\n\t\tif (me._reversePixels) {\r\n\t\t\tdecimal = 1 - decimal;\r\n\t\t}\r\n\r\n\t\treturn me._startPixel + decimal * me._length;\r\n\t},\r\n\r\n\tgetDecimalForPixel: function(pixel) {\r\n\t\tvar decimal = (pixel - this._startPixel) / this._length;\r\n\t\treturn this._reversePixels ? 1 - decimal : decimal;\r\n\t},\r\n\r\n\t/**\r\n\t * Returns the pixel for the minimum chart value\r\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\r\n\t */\r\n\tgetBasePixel: function() {\r\n\t\treturn this.getPixelForValue(this.getBaseValue());\r\n\t},\r\n\r\n\tgetBaseValue: function() {\r\n\t\tvar me = this;\r\n\t\tvar min = me.min;\r\n\t\tvar max = me.max;\r\n\r\n\t\treturn me.beginAtZero ? 0 :\r\n\t\t\tmin < 0 && max < 0 ? max :\r\n\t\t\tmin > 0 && max > 0 ? min :\r\n\t\t\t0;\r\n\t},\r\n\r\n\t/**\r\n\t * Returns a subset of ticks to be plotted to avoid overlapping labels.\r\n\t * @private\r\n\t */\r\n\t_autoSkip: function(ticks) {\r\n\t\tvar me = this;\r\n\t\tvar tickOpts = me.options.ticks;\r\n\t\tvar axisLength = me._length;\r\n\t\tvar ticksLimit = tickOpts.maxTicksLimit || axisLength / me._tickSize() + 1;\r\n\t\tvar majorIndices = tickOpts.major.enabled ? getMajorIndices(ticks) : [];\r\n\t\tvar numMajorIndices = majorIndices.length;\r\n\t\tvar first = majorIndices[0];\r\n\t\tvar last = majorIndices[numMajorIndices - 1];\r\n\t\tvar i, ilen, spacing, avgMajorSpacing;\r\n\r\n\t\t// If there are too many major ticks to display them all\r\n\t\tif (numMajorIndices > ticksLimit) {\r\n\t\t\tskipMajors(ticks, majorIndices, numMajorIndices / ticksLimit);\r\n\t\t\treturn nonSkipped(ticks);\r\n\t\t}\r\n\r\n\t\tspacing = calculateSpacing(majorIndices, ticks, axisLength, ticksLimit);\r\n\r\n\t\tif (numMajorIndices > 0) {\r\n\t\t\tfor (i = 0, ilen = numMajorIndices - 1; i < ilen; i++) {\r\n\t\t\t\tskip(ticks, spacing, majorIndices[i], majorIndices[i + 1]);\r\n\t\t\t}\r\n\t\t\tavgMajorSpacing = numMajorIndices > 1 ? (last - first) / (numMajorIndices - 1) : null;\r\n\t\t\tskip(ticks, spacing, helpers$1.isNullOrUndef(avgMajorSpacing) ? 0 : first - avgMajorSpacing, first);\r\n\t\t\tskip(ticks, spacing, last, helpers$1.isNullOrUndef(avgMajorSpacing) ? ticks.length : last + avgMajorSpacing);\r\n\t\t\treturn nonSkipped(ticks);\r\n\t\t}\r\n\t\tskip(ticks, spacing);\r\n\t\treturn nonSkipped(ticks);\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_tickSize: function() {\r\n\t\tvar me = this;\r\n\t\tvar optionTicks = me.options.ticks;\r\n\r\n\t\t// Calculate space needed by label in axis direction.\r\n\t\tvar rot = helpers$1.toRadians(me.labelRotation);\r\n\t\tvar cos = Math.abs(Math.cos(rot));\r\n\t\tvar sin = Math.abs(Math.sin(rot));\r\n\r\n\t\tvar labelSizes = me._getLabelSizes();\r\n\t\tvar padding = optionTicks.autoSkipPadding || 0;\r\n\t\tvar w = labelSizes ? labelSizes.widest.width + padding : 0;\r\n\t\tvar h = labelSizes ? labelSizes.highest.height + padding : 0;\r\n\r\n\t\t// Calculate space needed for 1 tick in axis direction.\r\n\t\treturn me.isHorizontal()\r\n\t\t\t? h * cos > w * sin ? w / cos : h / sin\r\n\t\t\t: h * sin < w * cos ? h / cos : w / sin;\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_isVisible: function() {\r\n\t\tvar me = this;\r\n\t\tvar chart = me.chart;\r\n\t\tvar display = me.options.display;\r\n\t\tvar i, ilen, meta;\r\n\r\n\t\tif (display !== 'auto') {\r\n\t\t\treturn !!display;\r\n\t\t}\r\n\r\n\t\t// When 'auto', the scale is visible if at least one associated dataset is visible.\r\n\t\tfor (i = 0, ilen = chart.data.datasets.length; i < ilen; ++i) {\r\n\t\t\tif (chart.isDatasetVisible(i)) {\r\n\t\t\t\tmeta = chart.getDatasetMeta(i);\r\n\t\t\t\tif (meta.xAxisID === me.id || meta.yAxisID === me.id) {\r\n\t\t\t\t\treturn true;\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\treturn false;\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_computeGridLineItems: function(chartArea) {\r\n\t\tvar me = this;\r\n\t\tvar chart = me.chart;\r\n\t\tvar options = me.options;\r\n\t\tvar gridLines = options.gridLines;\r\n\t\tvar position = options.position;\r\n\t\tvar offsetGridLines = gridLines.offsetGridLines;\r\n\t\tvar isHorizontal = me.isHorizontal();\r\n\t\tvar ticks = me._ticksToDraw;\r\n\t\tvar ticksLength = ticks.length + (offsetGridLines ? 1 : 0);\r\n\r\n\t\tvar tl = getTickMarkLength(gridLines);\r\n\t\tvar items = [];\r\n\t\tvar axisWidth = gridLines.drawBorder ? valueAtIndexOrDefault(gridLines.lineWidth, 0, 0) : 0;\r\n\t\tvar axisHalfWidth = axisWidth / 2;\r\n\t\tvar alignPixel = helpers$1._alignPixel;\r\n\t\tvar alignBorderValue = function(pixel) {\r\n\t\t\treturn alignPixel(chart, pixel, axisWidth);\r\n\t\t};\r\n\t\tvar borderValue, i, tick, lineValue, alignedLineValue;\r\n\t\tvar tx1, ty1, tx2, ty2, x1, y1, x2, y2, lineWidth, lineColor, borderDash, borderDashOffset;\r\n\r\n\t\tif (position === 'top') {\r\n\t\t\tborderValue = alignBorderValue(me.bottom);\r\n\t\t\tty1 = me.bottom - tl;\r\n\t\t\tty2 = borderValue - axisHalfWidth;\r\n\t\t\ty1 = alignBorderValue(chartArea.top) + axisHalfWidth;\r\n\t\t\ty2 = chartArea.bottom;\r\n\t\t} else if (position === 'bottom') {\r\n\t\t\tborderValue = alignBorderValue(me.top);\r\n\t\t\ty1 = chartArea.top;\r\n\t\t\ty2 = alignBorderValue(chartArea.bottom) - axisHalfWidth;\r\n\t\t\tty1 = borderValue + axisHalfWidth;\r\n\t\t\tty2 = me.top + tl;\r\n\t\t} else if (position === 'left') {\r\n\t\t\tborderValue = alignBorderValue(me.right);\r\n\t\t\ttx1 = me.right - tl;\r\n\t\t\ttx2 = borderValue - axisHalfWidth;\r\n\t\t\tx1 = alignBorderValue(chartArea.left) + axisHalfWidth;\r\n\t\t\tx2 = chartArea.right;\r\n\t\t} else {\r\n\t\t\tborderValue = alignBorderValue(me.left);\r\n\t\t\tx1 = chartArea.left;\r\n\t\t\tx2 = alignBorderValue(chartArea.right) - axisHalfWidth;\r\n\t\t\ttx1 = borderValue + axisHalfWidth;\r\n\t\t\ttx2 = me.left + tl;\r\n\t\t}\r\n\r\n\t\tfor (i = 0; i < ticksLength; ++i) {\r\n\t\t\ttick = ticks[i] || {};\r\n\r\n\t\t\t// autoskipper skipped this tick (#4635)\r\n\t\t\tif (isNullOrUndef(tick.label) && i < ticks.length) {\r\n\t\t\t\tcontinue;\r\n\t\t\t}\r\n\r\n\t\t\tif (i === me.zeroLineIndex && options.offset === offsetGridLines) {\r\n\t\t\t\t// Draw the first index specially\r\n\t\t\t\tlineWidth = gridLines.zeroLineWidth;\r\n\t\t\t\tlineColor = gridLines.zeroLineColor;\r\n\t\t\t\tborderDash = gridLines.zeroLineBorderDash || [];\r\n\t\t\t\tborderDashOffset = gridLines.zeroLineBorderDashOffset || 0.0;\r\n\t\t\t} else {\r\n\t\t\t\tlineWidth = valueAtIndexOrDefault(gridLines.lineWidth, i, 1);\r\n\t\t\t\tlineColor = valueAtIndexOrDefault(gridLines.color, i, 'rgba(0,0,0,0.1)');\r\n\t\t\t\tborderDash = gridLines.borderDash || [];\r\n\t\t\t\tborderDashOffset = gridLines.borderDashOffset || 0.0;\r\n\t\t\t}\r\n\r\n\t\t\tlineValue = getPixelForGridLine(me, tick._index || i, offsetGridLines);\r\n\r\n\t\t\t// Skip if the pixel is out of the range\r\n\t\t\tif (lineValue === undefined) {\r\n\t\t\t\tcontinue;\r\n\t\t\t}\r\n\r\n\t\t\talignedLineValue = alignPixel(chart, lineValue, lineWidth);\r\n\r\n\t\t\tif (isHorizontal) {\r\n\t\t\t\ttx1 = tx2 = x1 = x2 = alignedLineValue;\r\n\t\t\t} else {\r\n\t\t\t\tty1 = ty2 = y1 = y2 = alignedLineValue;\r\n\t\t\t}\r\n\r\n\t\t\titems.push({\r\n\t\t\t\ttx1: tx1,\r\n\t\t\t\tty1: ty1,\r\n\t\t\t\ttx2: tx2,\r\n\t\t\t\tty2: ty2,\r\n\t\t\t\tx1: x1,\r\n\t\t\t\ty1: y1,\r\n\t\t\t\tx2: x2,\r\n\t\t\t\ty2: y2,\r\n\t\t\t\twidth: lineWidth,\r\n\t\t\t\tcolor: lineColor,\r\n\t\t\t\tborderDash: borderDash,\r\n\t\t\t\tborderDashOffset: borderDashOffset,\r\n\t\t\t});\r\n\t\t}\r\n\r\n\t\titems.ticksLength = ticksLength;\r\n\t\titems.borderValue = borderValue;\r\n\r\n\t\treturn items;\r\n\t},\r\n\r\n\t/**\r\n\t * @private\r\n\t */\r\n\t_computeLabelItems: function() {\r\n\t\tvar me = this;\r\n\t\tvar options = me.options;\r\n\t\tvar optionTicks = options.ticks;\r\n\t\tvar position = options.position;\r\n\t\tvar isMirrored = optionTicks.mirror;\r\n\t\tvar isHorizontal = me.isHorizontal();\r\n\t\tvar ticks = me._ticksToDraw;\r\n\t\tvar fonts = parseTickFontOptions(optionTicks);\r\n\t\tvar tickPadding = optionTicks.padding;\r\n\t\tvar tl = getTickMarkLength(options.gridLines);\r\n\t\tvar rotation = -helpers$1.toRadians(me.labelRotation);\r\n\t\tvar items = [];\r\n