Actualización

web/assets/chart.js/src/scales/index.js

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+'use strict';
+
+var category = require('./scale.category');
+var linear = require('./scale.linear');
+var logarithmic = require('./scale.logarithmic');
+var radialLinear = require('./scale.radialLinear');
+var time = require('./scale.time');
+
+module.exports = {
+	category: category,
+	linear: linear,
+	logarithmic: logarithmic,
+	radialLinear: radialLinear,
+	time: time
+};

web/assets/chart.js/src/scales/scale.category.js

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+'use strict';
+
+var helpers = require('../helpers/index');
+var Scale = require('../core/core.scale');
+
+var isNullOrUndef = helpers.isNullOrUndef;
+
+var defaultConfig = {
+	position: 'bottom'
+};
+
+module.exports = Scale.extend({
+	determineDataLimits: function() {
+		var me = this;
+		var labels = me._getLabels();
+		var ticksOpts = me.options.ticks;
+		var min = ticksOpts.min;
+		var max = ticksOpts.max;
+		var minIndex = 0;
+		var maxIndex = labels.length - 1;
+		var findIndex;
+
+		if (min !== undefined) {
+			// user specified min value
+			findIndex = labels.indexOf(min);
+			if (findIndex >= 0) {
+				minIndex = findIndex;
+			}
+		}
+
+		if (max !== undefined) {
+			// user specified max value
+			findIndex = labels.indexOf(max);
+			if (findIndex >= 0) {
+				maxIndex = findIndex;
+			}
+		}
+
+		me.minIndex = minIndex;
+		me.maxIndex = maxIndex;
+		me.min = labels[minIndex];
+		me.max = labels[maxIndex];
+	},
+
+	buildTicks: function() {
+		var me = this;
+		var labels = me._getLabels();
+		var minIndex = me.minIndex;
+		var maxIndex = me.maxIndex;
+
+		// If we are viewing some subset of labels, slice the original array
+		me.ticks = (minIndex === 0 && maxIndex === labels.length - 1) ? labels : labels.slice(minIndex, maxIndex + 1);
+	},
+
+	getLabelForIndex: function(index, datasetIndex) {
+		var me = this;
+		var chart = me.chart;
+
+		if (chart.getDatasetMeta(datasetIndex).controller._getValueScaleId() === me.id) {
+			return me.getRightValue(chart.data.datasets[datasetIndex].data[index]);
+		}
+
+		return me._getLabels()[index];
+	},
+
+	_configure: function() {
+		var me = this;
+		var offset = me.options.offset;
+		var ticks = me.ticks;
+
+		Scale.prototype._configure.call(me);
+
+		if (!me.isHorizontal()) {
+			// For backward compatibility, vertical category scale reverse is inverted.
+			me._reversePixels = !me._reversePixels;
+		}
+
+		if (!ticks) {
+			return;
+		}
+
+		me._startValue = me.minIndex - (offset ? 0.5 : 0);
+		me._valueRange = Math.max(ticks.length - (offset ? 0 : 1), 1);
+	},
+
+	// Used to get data value locations.  Value can either be an index or a numerical value
+	getPixelForValue: function(value, index, datasetIndex) {
+		var me = this;
+		var valueCategory, labels, idx;
+
+		if (!isNullOrUndef(index) && !isNullOrUndef(datasetIndex)) {
+			value = me.chart.data.datasets[datasetIndex].data[index];
+		}
+
+		// If value is a data object, then index is the index in the data array,
+		// not the index of the scale. We need to change that.
+		if (!isNullOrUndef(value)) {
+			valueCategory = me.isHorizontal() ? value.x : value.y;
+		}
+		if (valueCategory !== undefined || (value !== undefined && isNaN(index))) {
+			labels = me._getLabels();
+			value = helpers.valueOrDefault(valueCategory, value);
+			idx = labels.indexOf(value);
+			index = idx !== -1 ? idx : index;
+			if (isNaN(index)) {
+				index = value;
+			}
+		}
+		return me.getPixelForDecimal((index - me._startValue) / me._valueRange);
+	},
+
+	getPixelForTick: function(index) {
+		var ticks = this.ticks;
+		return index < 0 || index > ticks.length - 1
+			? null
+			: this.getPixelForValue(ticks[index], index + this.minIndex);
+	},
+
+	getValueForPixel: function(pixel) {
+		var me = this;
+		var value = Math.round(me._startValue + me.getDecimalForPixel(pixel) * me._valueRange);
+		return Math.min(Math.max(value, 0), me.ticks.length - 1);
+	},
+
+	getBasePixel: function() {
+		return this.bottom;
+	}
+});
+
+// INTERNAL: static default options, registered in src/index.js
+module.exports._defaults = defaultConfig;

web/assets/chart.js/src/scales/scale.linear.js

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+'use strict';
+
+var helpers = require('../helpers/index');
+var LinearScaleBase = require('./scale.linearbase');
+var Ticks = require('../core/core.ticks');
+
+var defaultConfig = {
+	position: 'left',
+	ticks: {
+		callback: Ticks.formatters.linear
+	}
+};
+
+var DEFAULT_MIN = 0;
+var DEFAULT_MAX = 1;
+
+function getOrCreateStack(stacks, stacked, meta) {
+	var key = [
+		meta.type,
+		// we have a separate stack for stack=undefined datasets when the opts.stacked is undefined
+		stacked === undefined && meta.stack === undefined ? meta.index : '',
+		meta.stack
+	].join('.');
+
+	if (stacks[key] === undefined) {
+		stacks[key] = {
+			pos: [],
+			neg: []
+		};
+	}
+
+	return stacks[key];
+}
+
+function stackData(scale, stacks, meta, data) {
+	var opts = scale.options;
+	var stacked = opts.stacked;
+	var stack = getOrCreateStack(stacks, stacked, meta);
+	var pos = stack.pos;
+	var neg = stack.neg;
+	var ilen = data.length;
+	var i, value;
+
+	for (i = 0; i < ilen; ++i) {
+		value = scale._parseValue(data[i]);
+		if (isNaN(value.min) || isNaN(value.max) || meta.data[i].hidden) {
+			continue;
+		}
+
+		pos[i] = pos[i] || 0;
+		neg[i] = neg[i] || 0;
+
+		if (opts.relativePoints) {
+			pos[i] = 100;
+		} else if (value.min < 0 || value.max < 0) {
+			neg[i] += value.min;
+		} else {
+			pos[i] += value.max;
+		}
+	}
+}
+
+function updateMinMax(scale, meta, data) {
+	var ilen = data.length;
+	var i, value;
+
+	for (i = 0; i < ilen; ++i) {
+		value = scale._parseValue(data[i]);
+		if (isNaN(value.min) || isNaN(value.max) || meta.data[i].hidden) {
+			continue;
+		}
+
+		scale.min = Math.min(scale.min, value.min);
+		scale.max = Math.max(scale.max, value.max);
+	}
+}
+
+module.exports = LinearScaleBase.extend({
+	determineDataLimits: function() {
+		var me = this;
+		var opts = me.options;
+		var chart = me.chart;
+		var datasets = chart.data.datasets;
+		var metasets = me._getMatchingVisibleMetas();
+		var hasStacks = opts.stacked;
+		var stacks = {};
+		var ilen = metasets.length;
+		var i, meta, data, values;
+
+		me.min = Number.POSITIVE_INFINITY;
+		me.max = Number.NEGATIVE_INFINITY;
+
+		if (hasStacks === undefined) {
+			for (i = 0; !hasStacks && i < ilen; ++i) {
+				meta = metasets[i];
+				hasStacks = meta.stack !== undefined;
+			}
+		}
+
+		for (i = 0; i < ilen; ++i) {
+			meta = metasets[i];
+			data = datasets[meta.index].data;
+			if (hasStacks) {
+				stackData(me, stacks, meta, data);
+			} else {
+				updateMinMax(me, meta, data);
+			}
+		}
+
+		helpers.each(stacks, function(stackValues) {
+			values = stackValues.pos.concat(stackValues.neg);
+			me.min = Math.min(me.min, helpers.min(values));
+			me.max = Math.max(me.max, helpers.max(values));
+		});
+
+		me.min = helpers.isFinite(me.min) && !isNaN(me.min) ? me.min : DEFAULT_MIN;
+		me.max = helpers.isFinite(me.max) && !isNaN(me.max) ? me.max : DEFAULT_MAX;
+
+		// Common base implementation to handle ticks.min, ticks.max, ticks.beginAtZero
+		me.handleTickRangeOptions();
+	},
+
+	// Returns the maximum number of ticks based on the scale dimension
+	_computeTickLimit: function() {
+		var me = this;
+		var tickFont;
+
+		if (me.isHorizontal()) {
+			return Math.ceil(me.width / 40);
+		}
+		tickFont = helpers.options._parseFont(me.options.ticks);
+		return Math.ceil(me.height / tickFont.lineHeight);
+	},
+
+	// Called after the ticks are built. We need
+	handleDirectionalChanges: function() {
+		if (!this.isHorizontal()) {
+			// We are in a vertical orientation. The top value is the highest. So reverse the array
+			this.ticks.reverse();
+		}
+	},
+
+	getLabelForIndex: function(index, datasetIndex) {
+		return this._getScaleLabel(this.chart.data.datasets[datasetIndex].data[index]);
+	},
+
+	// Utils
+	getPixelForValue: function(value) {
+		var me = this;
+		return me.getPixelForDecimal((+me.getRightValue(value) - me._startValue) / me._valueRange);
+	},
+
+	getValueForPixel: function(pixel) {
+		return this._startValue + this.getDecimalForPixel(pixel) * this._valueRange;
+	},
+
+	getPixelForTick: function(index) {
+		var ticks = this.ticksAsNumbers;
+		if (index < 0 || index > ticks.length - 1) {
+			return null;
+		}
+		return this.getPixelForValue(ticks[index]);
+	}
+});
+
+// INTERNAL: static default options, registered in src/index.js
+module.exports._defaults = defaultConfig;

web/assets/chart.js/src/scales/scale.linearbase.js

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+'use strict';
+
+var helpers = require('../helpers/index');
+var Scale = require('../core/core.scale');
+
+var noop = helpers.noop;
+var isNullOrUndef = helpers.isNullOrUndef;
+
+/**
+ * Generate a set of linear ticks
+ * @param generationOptions the options used to generate the ticks
+ * @param dataRange the range of the data
+ * @returns {number[]} array of tick values
+ */
+function generateTicks(generationOptions, dataRange) {
+	var ticks = [];
+	// To get a "nice" value for the tick spacing, we will use the appropriately named
+	// "nice number" algorithm. See https://stackoverflow.com/questions/8506881/nice-label-algorithm-for-charts-with-minimum-ticks
+	// for details.
+
+	var MIN_SPACING = 1e-14;
+	var stepSize = generationOptions.stepSize;
+	var unit = stepSize || 1;
+	var maxNumSpaces = generationOptions.maxTicks - 1;
+	var min = generationOptions.min;
+	var max = generationOptions.max;
+	var precision = generationOptions.precision;
+	var rmin = dataRange.min;
+	var rmax = dataRange.max;
+	var spacing = helpers.niceNum((rmax - rmin) / maxNumSpaces / unit) * unit;
+	var factor, niceMin, niceMax, numSpaces;
+
+	// Beyond MIN_SPACING floating point numbers being to lose precision
+	// such that we can't do the math necessary to generate ticks
+	if (spacing < MIN_SPACING && isNullOrUndef(min) && isNullOrUndef(max)) {
+		return [rmin, rmax];
+	}
+
+	numSpaces = Math.ceil(rmax / spacing) - Math.floor(rmin / spacing);
+	if (numSpaces > maxNumSpaces) {
+		// If the calculated num of spaces exceeds maxNumSpaces, recalculate it
+		spacing = helpers.niceNum(numSpaces * spacing / maxNumSpaces / unit) * unit;
+	}
+
+	if (stepSize || isNullOrUndef(precision)) {
+		// If a precision is not specified, calculate factor based on spacing
+		factor = Math.pow(10, helpers._decimalPlaces(spacing));
+	} else {
+		// If the user specified a precision, round to that number of decimal places
+		factor = Math.pow(10, precision);
+		spacing = Math.ceil(spacing * factor) / factor;
+	}
+
+	niceMin = Math.floor(rmin / spacing) * spacing;
+	niceMax = Math.ceil(rmax / spacing) * spacing;
+
+	// If min, max and stepSize is set and they make an evenly spaced scale use it.
+	if (stepSize) {
+		// If very close to our whole number, use it.
+		if (!isNullOrUndef(min) && helpers.almostWhole(min / spacing, spacing / 1000)) {
+			niceMin = min;
+		}
+		if (!isNullOrUndef(max) && helpers.almostWhole(max / spacing, spacing / 1000)) {
+			niceMax = max;
+		}
+	}
+
+	numSpaces = (niceMax - niceMin) / spacing;
+	// If very close to our rounded value, use it.
+	if (helpers.almostEquals(numSpaces, Math.round(numSpaces), spacing / 1000)) {
+		numSpaces = Math.round(numSpaces);
+	} else {
+		numSpaces = Math.ceil(numSpaces);
+	}
+
+	niceMin = Math.round(niceMin * factor) / factor;
+	niceMax = Math.round(niceMax * factor) / factor;
+	ticks.push(isNullOrUndef(min) ? niceMin : min);
+	for (var j = 1; j < numSpaces; ++j) {
+		ticks.push(Math.round((niceMin + j * spacing) * factor) / factor);
+	}
+	ticks.push(isNullOrUndef(max) ? niceMax : max);
+
+	return ticks;
+}
+
+module.exports = Scale.extend({
+	getRightValue: function(value) {
+		if (typeof value === 'string') {
+			return +value;
+		}
+		return Scale.prototype.getRightValue.call(this, value);
+	},
+
+	handleTickRangeOptions: function() {
+		var me = this;
+		var opts = me.options;
+		var tickOpts = opts.ticks;
+
+		// If we are forcing it to begin at 0, but 0 will already be rendered on the chart,
+		// do nothing since that would make the chart weird. If the user really wants a weird chart
+		// axis, they can manually override it
+		if (tickOpts.beginAtZero) {
+			var minSign = helpers.sign(me.min);
+			var maxSign = helpers.sign(me.max);
+
+			if (minSign < 0 && maxSign < 0) {
+				// move the top up to 0
+				me.max = 0;
+			} else if (minSign > 0 && maxSign > 0) {
+				// move the bottom down to 0
+				me.min = 0;
+			}
+		}
+
+		var setMin = tickOpts.min !== undefined || tickOpts.suggestedMin !== undefined;
+		var setMax = tickOpts.max !== undefined || tickOpts.suggestedMax !== undefined;
+
+		if (tickOpts.min !== undefined) {
+			me.min = tickOpts.min;
+		} else if (tickOpts.suggestedMin !== undefined) {
+			if (me.min === null) {
+				me.min = tickOpts.suggestedMin;
+			} else {
+				me.min = Math.min(me.min, tickOpts.suggestedMin);
+			}
+		}
+
+		if (tickOpts.max !== undefined) {
+			me.max = tickOpts.max;
+		} else if (tickOpts.suggestedMax !== undefined) {
+			if (me.max === null) {
+				me.max = tickOpts.suggestedMax;
+			} else {
+				me.max = Math.max(me.max, tickOpts.suggestedMax);
+			}
+		}
+
+		if (setMin !== setMax) {
+			// We set the min or the max but not both.
+			// So ensure that our range is good
+			// Inverted or 0 length range can happen when
+			// ticks.min is set, and no datasets are visible
+			if (me.min >= me.max) {
+				if (setMin) {
+					me.max = me.min + 1;
+				} else {
+					me.min = me.max - 1;
+				}
+			}
+		}
+
+		if (me.min === me.max) {
+			me.max++;
+
+			if (!tickOpts.beginAtZero) {
+				me.min--;
+			}
+		}
+	},
+
+	getTickLimit: function() {
+		var me = this;
+		var tickOpts = me.options.ticks;
+		var stepSize = tickOpts.stepSize;
+		var maxTicksLimit = tickOpts.maxTicksLimit;
+		var maxTicks;
+
+		if (stepSize) {
+			maxTicks = Math.ceil(me.max / stepSize) - Math.floor(me.min / stepSize) + 1;
+		} else {
+			maxTicks = me._computeTickLimit();
+			maxTicksLimit = maxTicksLimit || 11;
+		}
+
+		if (maxTicksLimit) {
+			maxTicks = Math.min(maxTicksLimit, maxTicks);
+		}
+
+		return maxTicks;
+	},
+
+	_computeTickLimit: function() {
+		return Number.POSITIVE_INFINITY;
+	},
+
+	handleDirectionalChanges: noop,
+
+	buildTicks: function() {
+		var me = this;
+		var opts = me.options;
+		var tickOpts = opts.ticks;
+
+		// Figure out what the max number of ticks we can support it is based on the size of
+		// the axis area. For now, we say that the minimum tick spacing in pixels must be 40
+		// We also limit the maximum number of ticks to 11 which gives a nice 10 squares on
+		// the graph. Make sure we always have at least 2 ticks
+		var maxTicks = me.getTickLimit();
+		maxTicks = Math.max(2, maxTicks);
+
+		var numericGeneratorOptions = {
+			maxTicks: maxTicks,
+			min: tickOpts.min,
+			max: tickOpts.max,
+			precision: tickOpts.precision,
+			stepSize: helpers.valueOrDefault(tickOpts.fixedStepSize, tickOpts.stepSize)
+		};
+		var ticks = me.ticks = generateTicks(numericGeneratorOptions, me);
+
+		me.handleDirectionalChanges();
+
+		// At this point, we need to update our max and min given the tick values since we have expanded the
+		// range of the scale
+		me.max = helpers.max(ticks);
+		me.min = helpers.min(ticks);
+
+		if (tickOpts.reverse) {
+			ticks.reverse();
+
+			me.start = me.max;
+			me.end = me.min;
+		} else {
+			me.start = me.min;
+			me.end = me.max;
+		}
+	},
+
+	convertTicksToLabels: function() {
+		var me = this;
+		me.ticksAsNumbers = me.ticks.slice();
+		me.zeroLineIndex = me.ticks.indexOf(0);
+
+		Scale.prototype.convertTicksToLabels.call(me);
+	},
+
+	_configure: function() {
+		var me = this;
+		var ticks = me.getTicks();
+		var start = me.min;
+		var end = me.max;
+		var offset;
+
+		Scale.prototype._configure.call(me);
+
+		if (me.options.offset && ticks.length) {
+			offset = (end - start) / Math.max(ticks.length - 1, 1) / 2;
+			start -= offset;
+			end += offset;
+		}
+		me._startValue = start;
+		me._endValue = end;
+		me._valueRange = end - start;
+	}
+});

web/assets/chart.js/src/scales/scale.logarithmic.js

@@ -0,0 +1,308 @@
+'use strict';
+
+var defaults = require('../core/core.defaults');
+var helpers = require('../helpers/index');
+var Scale = require('../core/core.scale');
+var Ticks = require('../core/core.ticks');
+
+var valueOrDefault = helpers.valueOrDefault;
+var log10 = helpers.math.log10;
+
+/**
+ * Generate a set of logarithmic ticks
+ * @param generationOptions the options used to generate the ticks
+ * @param dataRange the range of the data
+ * @returns {number[]} array of tick values
+ */
+function generateTicks(generationOptions, dataRange) {
+	var ticks = [];
+
+	var tickVal = valueOrDefault(generationOptions.min, Math.pow(10, Math.floor(log10(dataRange.min))));
+
+	var endExp = Math.floor(log10(dataRange.max));
+	var endSignificand = Math.ceil(dataRange.max / Math.pow(10, endExp));
+	var exp, significand;
+
+	if (tickVal === 0) {
+		exp = Math.floor(log10(dataRange.minNotZero));
+		significand = Math.floor(dataRange.minNotZero / Math.pow(10, exp));
+
+		ticks.push(tickVal);
+		tickVal = significand * Math.pow(10, exp);
+	} else {
+		exp = Math.floor(log10(tickVal));
+		significand = Math.floor(tickVal / Math.pow(10, exp));
+	}
+	var precision = exp < 0 ? Math.pow(10, Math.abs(exp)) : 1;
+
+	do {
+		ticks.push(tickVal);
+
+		++significand;
+		if (significand === 10) {
+			significand = 1;
+			++exp;
+			precision = exp >= 0 ? 1 : precision;
+		}
+
+		tickVal = Math.round(significand * Math.pow(10, exp) * precision) / precision;
+	} while (exp < endExp || (exp === endExp && significand < endSignificand));
+
+	var lastTick = valueOrDefault(generationOptions.max, tickVal);
+	ticks.push(lastTick);
+
+	return ticks;
+}
+
+var defaultConfig = {
+	position: 'left',
+
+	// label settings
+	ticks: {
+		callback: Ticks.formatters.logarithmic
+	}
+};
+
+// TODO(v3): change this to positiveOrDefault
+function nonNegativeOrDefault(value, defaultValue) {
+	return helpers.isFinite(value) && value >= 0 ? value : defaultValue;
+}
+
+module.exports = Scale.extend({
+	determineDataLimits: function() {
+		var me = this;
+		var opts = me.options;
+		var chart = me.chart;
+		var datasets = chart.data.datasets;
+		var isHorizontal = me.isHorizontal();
+		function IDMatches(meta) {
+			return isHorizontal ? meta.xAxisID === me.id : meta.yAxisID === me.id;
+		}
+		var datasetIndex, meta, value, data, i, ilen;
+
+		// Calculate Range
+		me.min = Number.POSITIVE_INFINITY;
+		me.max = Number.NEGATIVE_INFINITY;
+		me.minNotZero = Number.POSITIVE_INFINITY;
+
+		var hasStacks = opts.stacked;
+		if (hasStacks === undefined) {
+			for (datasetIndex = 0; datasetIndex < datasets.length; datasetIndex++) {
+				meta = chart.getDatasetMeta(datasetIndex);
+				if (chart.isDatasetVisible(datasetIndex) && IDMatches(meta) &&
+					meta.stack !== undefined) {
+					hasStacks = true;
+					break;
+				}
+			}
+		}
+
+		if (opts.stacked || hasStacks) {
+			var valuesPerStack = {};
+
+			for (datasetIndex = 0; datasetIndex < datasets.length; datasetIndex++) {
+				meta = chart.getDatasetMeta(datasetIndex);
+				var key = [
+					meta.type,
+					// we have a separate stack for stack=undefined datasets when the opts.stacked is undefined
+					((opts.stacked === undefined && meta.stack === undefined) ? datasetIndex : ''),
+					meta.stack
+				].join('.');
+
+				if (chart.isDatasetVisible(datasetIndex) && IDMatches(meta)) {
+					if (valuesPerStack[key] === undefined) {
+						valuesPerStack[key] = [];
+					}
+
+					data = datasets[datasetIndex].data;
+					for (i = 0, ilen = data.length; i < ilen; i++) {
+						var values = valuesPerStack[key];
+						value = me._parseValue(data[i]);
+						// invalid, hidden and negative values are ignored
+						if (isNaN(value.min) || isNaN(value.max) || meta.data[i].hidden || value.min < 0 || value.max < 0) {
+							continue;
+						}
+						values[i] = values[i] || 0;
+						values[i] += value.max;
+					}
+				}
+			}
+
+			helpers.each(valuesPerStack, function(valuesForType) {
+				if (valuesForType.length > 0) {
+					var minVal = helpers.min(valuesForType);
+					var maxVal = helpers.max(valuesForType);
+					me.min = Math.min(me.min, minVal);
+					me.max = Math.max(me.max, maxVal);
+				}
+			});
+
+		} else {
+			for (datasetIndex = 0; datasetIndex < datasets.length; datasetIndex++) {
+				meta = chart.getDatasetMeta(datasetIndex);
+				if (chart.isDatasetVisible(datasetIndex) && IDMatches(meta)) {
+					data = datasets[datasetIndex].data;
+					for (i = 0, ilen = data.length; i < ilen; i++) {
+						value = me._parseValue(data[i]);
+						// invalid, hidden and negative values are ignored
+						if (isNaN(value.min) || isNaN(value.max) || meta.data[i].hidden || value.min < 0 || value.max < 0) {
+							continue;
+						}
+
+						me.min = Math.min(value.min, me.min);
+						me.max = Math.max(value.max, me.max);
+
+						if (value.min !== 0) {
+							me.minNotZero = Math.min(value.min, me.minNotZero);
+						}
+					}
+				}
+			}
+		}
+
+		me.min = helpers.isFinite(me.min) ? me.min : null;
+		me.max = helpers.isFinite(me.max) ? me.max : null;
+		me.minNotZero = helpers.isFinite(me.minNotZero) ? me.minNotZero : null;
+
+		// Common base implementation to handle ticks.min, ticks.max
+		this.handleTickRangeOptions();
+	},
+
+	handleTickRangeOptions: function() {
+		var me = this;
+		var tickOpts = me.options.ticks;
+		var DEFAULT_MIN = 1;
+		var DEFAULT_MAX = 10;
+
+		me.min = nonNegativeOrDefault(tickOpts.min, me.min);
+		me.max = nonNegativeOrDefault(tickOpts.max, me.max);
+
+		if (me.min === me.max) {
+			if (me.min !== 0 && me.min !== null) {
+				me.min = Math.pow(10, Math.floor(log10(me.min)) - 1);
+				me.max = Math.pow(10, Math.floor(log10(me.max)) + 1);
+			} else {
+				me.min = DEFAULT_MIN;
+				me.max = DEFAULT_MAX;
+			}
+		}
+		if (me.min === null) {
+			me.min = Math.pow(10, Math.floor(log10(me.max)) - 1);
+		}
+		if (me.max === null) {
+			me.max = me.min !== 0
+				? Math.pow(10, Math.floor(log10(me.min)) + 1)
+				: DEFAULT_MAX;
+		}
+		if (me.minNotZero === null) {
+			if (me.min > 0) {
+				me.minNotZero = me.min;
+			} else if (me.max < 1) {
+				me.minNotZero = Math.pow(10, Math.floor(log10(me.max)));
+			} else {
+				me.minNotZero = DEFAULT_MIN;
+			}
+		}
+	},
+
+	buildTicks: function() {
+		var me = this;
+		var tickOpts = me.options.ticks;
+		var reverse = !me.isHorizontal();
+
+		var generationOptions = {
+			min: nonNegativeOrDefault(tickOpts.min),
+			max: nonNegativeOrDefault(tickOpts.max)
+		};
+		var ticks = me.ticks = generateTicks(generationOptions, me);
+
+		// At this point, we need to update our max and min given the tick values since we have expanded the
+		// range of the scale
+		me.max = helpers.max(ticks);
+		me.min = helpers.min(ticks);
+
+		if (tickOpts.reverse) {
+			reverse = !reverse;
+			me.start = me.max;
+			me.end = me.min;
+		} else {
+			me.start = me.min;
+			me.end = me.max;
+		}
+		if (reverse) {
+			ticks.reverse();
+		}
+	},
+
+	convertTicksToLabels: function() {
+		this.tickValues = this.ticks.slice();
+
+		Scale.prototype.convertTicksToLabels.call(this);
+	},
+
+	// Get the correct tooltip label
+	getLabelForIndex: function(index, datasetIndex) {
+		return this._getScaleLabel(this.chart.data.datasets[datasetIndex].data[index]);
+	},
+
+	getPixelForTick: function(index) {
+		var ticks = this.tickValues;
+		if (index < 0 || index > ticks.length - 1) {
+			return null;
+		}
+		return this.getPixelForValue(ticks[index]);
+	},
+
+	/**
+	 * Returns the value of the first tick.
+	 * @param {number} value - The minimum not zero value.
+	 * @return {number} The first tick value.
+	 * @private
+	 */
+	_getFirstTickValue: function(value) {
+		var exp = Math.floor(log10(value));
+		var significand = Math.floor(value / Math.pow(10, exp));
+
+		return significand * Math.pow(10, exp);
+	},
+
+	_configure: function() {
+		var me = this;
+		var start = me.min;
+		var offset = 0;
+
+		Scale.prototype._configure.call(me);
+
+		if (start === 0) {
+			start = me._getFirstTickValue(me.minNotZero);
+			offset = valueOrDefault(me.options.ticks.fontSize, defaults.global.defaultFontSize) / me._length;
+		}
+
+		me._startValue = log10(start);
+		me._valueOffset = offset;
+		me._valueRange = (log10(me.max) - log10(start)) / (1 - offset);
+	},
+
+	getPixelForValue: function(value) {
+		var me = this;
+		var decimal = 0;
+
+		value = +me.getRightValue(value);
+
+		if (value > me.min && value > 0) {
+			decimal = (log10(value) - me._startValue) / me._valueRange + me._valueOffset;
+		}
+		return me.getPixelForDecimal(decimal);
+	},
+
+	getValueForPixel: function(pixel) {
+		var me = this;
+		var decimal = me.getDecimalForPixel(pixel);
+		return decimal === 0 && me.min === 0
+			? 0
+			: Math.pow(10, me._startValue + (decimal - me._valueOffset) * me._valueRange);
+	}
+});
+
+// INTERNAL: static default options, registered in src/index.js
+module.exports._defaults = defaultConfig;

web/assets/chart.js/src/scales/scale.radialLinear.js

@@ -0,0 +1,558 @@
+'use strict';
+
+var defaults = require('../core/core.defaults');
+var helpers = require('../helpers/index');
+var LinearScaleBase = require('./scale.linearbase');
+var Ticks = require('../core/core.ticks');
+
+var valueOrDefault = helpers.valueOrDefault;
+var valueAtIndexOrDefault = helpers.valueAtIndexOrDefault;
+var resolve = helpers.options.resolve;
+
+var defaultConfig = {
+	display: true,
+
+	// Boolean - Whether to animate scaling the chart from the centre
+	animate: true,
+	position: 'chartArea',
+
+	angleLines: {
+		display: true,
+		color: 'rgba(0,0,0,0.1)',
+		lineWidth: 1,
+		borderDash: [],
+		borderDashOffset: 0.0
+	},
+
+	gridLines: {
+		circular: false
+	},
+
+	// label settings
+	ticks: {
+		// Boolean - Show a backdrop to the scale label
+		showLabelBackdrop: true,
+
+		// String - The colour of the label backdrop
+		backdropColor: 'rgba(255,255,255,0.75)',
+
+		// Number - The backdrop padding above & below the label in pixels
+		backdropPaddingY: 2,
+
+		// Number - The backdrop padding to the side of the label in pixels
+		backdropPaddingX: 2,
+
+		callback: Ticks.formatters.linear
+	},
+
+	pointLabels: {
+		// Boolean - if true, show point labels
+		display: true,
+
+		// Number - Point label font size in pixels
+		fontSize: 10,
+
+		// Function - Used to convert point labels
+		callback: function(label) {
+			return label;
+		}
+	}
+};
+
+function getTickBackdropHeight(opts) {
+	var tickOpts = opts.ticks;
+
+	if (tickOpts.display && opts.display) {
+		return valueOrDefault(tickOpts.fontSize, defaults.global.defaultFontSize) + tickOpts.backdropPaddingY * 2;
+	}
+	return 0;
+}
+
+function measureLabelSize(ctx, lineHeight, label) {
+	if (helpers.isArray(label)) {
+		return {
+			w: helpers.longestText(ctx, ctx.font, label),
+			h: label.length * lineHeight
+		};
+	}
+
+	return {
+		w: ctx.measureText(label).width,
+		h: lineHeight
+	};
+}
+
+function determineLimits(angle, pos, size, min, max) {
+	if (angle === min || angle === max) {
+		return {
+			start: pos - (size / 2),
+			end: pos + (size / 2)
+		};
+	} else if (angle < min || angle > max) {
+		return {
+			start: pos - size,
+			end: pos
+		};
+	}
+
+	return {
+		start: pos,
+		end: pos + size
+	};
+}
+
+/**
+ * Helper function to fit a radial linear scale with point labels
+ */
+function fitWithPointLabels(scale) {
+
+	// Right, this is really confusing and there is a lot of maths going on here
+	// The gist of the problem is here: https://gist.github.com/nnnick/696cc9c55f4b0beb8fe9
+	//
+	// Reaction: https://dl.dropboxusercontent.com/u/34601363/toomuchscience.gif
+	//
+	// Solution:
+	//
+	// We assume the radius of the polygon is half the size of the canvas at first
+	// at each index we check if the text overlaps.
+	//
+	// Where it does, we store that angle and that index.
+	//
+	// After finding the largest index and angle we calculate how much we need to remove
+	// from the shape radius to move the point inwards by that x.
+	//
+	// We average the left and right distances to get the maximum shape radius that can fit in the box
+	// along with labels.
+	//
+	// Once we have that, we can find the centre point for the chart, by taking the x text protrusion
+	// on each side, removing that from the size, halving it and adding the left x protrusion width.
+	//
+	// This will mean we have a shape fitted to the canvas, as large as it can be with the labels
+	// and position it in the most space efficient manner
+	//
+	// https://dl.dropboxusercontent.com/u/34601363/yeahscience.gif
+
+	var plFont = helpers.options._parseFont(scale.options.pointLabels);
+
+	// Get maximum radius of the polygon. Either half the height (minus the text width) or half the width.
+	// Use this to calculate the offset + change. - Make sure L/R protrusion is at least 0 to stop issues with centre points
+	var furthestLimits = {
+		l: 0,
+		r: scale.width,
+		t: 0,
+		b: scale.height - scale.paddingTop
+	};
+	var furthestAngles = {};
+	var i, textSize, pointPosition;
+
+	scale.ctx.font = plFont.string;
+	scale._pointLabelSizes = [];
+
+	var valueCount = scale.chart.data.labels.length;
+	for (i = 0; i < valueCount; i++) {
+		pointPosition = scale.getPointPosition(i, scale.drawingArea + 5);
+		textSize = measureLabelSize(scale.ctx, plFont.lineHeight, scale.pointLabels[i]);
+		scale._pointLabelSizes[i] = textSize;
+
+		// Add quarter circle to make degree 0 mean top of circle
+		var angleRadians = scale.getIndexAngle(i);
+		var angle = helpers.toDegrees(angleRadians) % 360;
+		var hLimits = determineLimits(angle, pointPosition.x, textSize.w, 0, 180);
+		var vLimits = determineLimits(angle, pointPosition.y, textSize.h, 90, 270);
+
+		if (hLimits.start < furthestLimits.l) {
+			furthestLimits.l = hLimits.start;
+			furthestAngles.l = angleRadians;
+		}
+
+		if (hLimits.end > furthestLimits.r) {
+			furthestLimits.r = hLimits.end;
+			furthestAngles.r = angleRadians;
+		}
+
+		if (vLimits.start < furthestLimits.t) {
+			furthestLimits.t = vLimits.start;
+			furthestAngles.t = angleRadians;
+		}
+
+		if (vLimits.end > furthestLimits.b) {
+			furthestLimits.b = vLimits.end;
+			furthestAngles.b = angleRadians;
+		}
+	}
+
+	scale.setReductions(scale.drawingArea, furthestLimits, furthestAngles);
+}
+
+function getTextAlignForAngle(angle) {
+	if (angle === 0 || angle === 180) {
+		return 'center';
+	} else if (angle < 180) {
+		return 'left';
+	}
+
+	return 'right';
+}
+
+function fillText(ctx, text, position, lineHeight) {
+	var y = position.y + lineHeight / 2;
+	var i, ilen;
+
+	if (helpers.isArray(text)) {
+		for (i = 0, ilen = text.length; i < ilen; ++i) {
+			ctx.fillText(text[i], position.x, y);
+			y += lineHeight;
+		}
+	} else {
+		ctx.fillText(text, position.x, y);
+	}
+}
+
+function adjustPointPositionForLabelHeight(angle, textSize, position) {
+	if (angle === 90 || angle === 270) {
+		position.y -= (textSize.h / 2);
+	} else if (angle > 270 || angle < 90) {
+		position.y -= textSize.h;
+	}
+}
+
+function drawPointLabels(scale) {
+	var ctx = scale.ctx;
+	var opts = scale.options;
+	var pointLabelOpts = opts.pointLabels;
+	var tickBackdropHeight = getTickBackdropHeight(opts);
+	var outerDistance = scale.getDistanceFromCenterForValue(opts.ticks.reverse ? scale.min : scale.max);
+	var plFont = helpers.options._parseFont(pointLabelOpts);
+
+	ctx.save();
+
+	ctx.font = plFont.string;
+	ctx.textBaseline = 'middle';
+
+	for (var i = scale.chart.data.labels.length - 1; i >= 0; i--) {
+		// Extra pixels out for some label spacing
+		var extra = (i === 0 ? tickBackdropHeight / 2 : 0);
+		var pointLabelPosition = scale.getPointPosition(i, outerDistance + extra + 5);
+
+		// Keep this in loop since we may support array properties here
+		var pointLabelFontColor = valueAtIndexOrDefault(pointLabelOpts.fontColor, i, defaults.global.defaultFontColor);
+		ctx.fillStyle = pointLabelFontColor;
+
+		var angleRadians = scale.getIndexAngle(i);
+		var angle = helpers.toDegrees(angleRadians);
+		ctx.textAlign = getTextAlignForAngle(angle);
+		adjustPointPositionForLabelHeight(angle, scale._pointLabelSizes[i], pointLabelPosition);
+		fillText(ctx, scale.pointLabels[i], pointLabelPosition, plFont.lineHeight);
+	}
+	ctx.restore();
+}
+
+function drawRadiusLine(scale, gridLineOpts, radius, index) {
+	var ctx = scale.ctx;
+	var circular = gridLineOpts.circular;
+	var valueCount = scale.chart.data.labels.length;
+	var lineColor = valueAtIndexOrDefault(gridLineOpts.color, index - 1);
+	var lineWidth = valueAtIndexOrDefault(gridLineOpts.lineWidth, index - 1);
+	var pointPosition;
+
+	if ((!circular && !valueCount) || !lineColor || !lineWidth) {
+		return;
+	}
+
+	ctx.save();
+	ctx.strokeStyle = lineColor;
+	ctx.lineWidth = lineWidth;
+	if (ctx.setLineDash) {
+		ctx.setLineDash(gridLineOpts.borderDash || []);
+		ctx.lineDashOffset = gridLineOpts.borderDashOffset || 0.0;
+	}
+
+	ctx.beginPath();
+	if (circular) {
+		// Draw circular arcs between the points
+		ctx.arc(scale.xCenter, scale.yCenter, radius, 0, Math.PI * 2);
+	} else {
+		// Draw straight lines connecting each index
+		pointPosition = scale.getPointPosition(0, radius);
+		ctx.moveTo(pointPosition.x, pointPosition.y);
+
+		for (var i = 1; i < valueCount; i++) {
+			pointPosition = scale.getPointPosition(i, radius);
+			ctx.lineTo(pointPosition.x, pointPosition.y);
+		}
+	}
+	ctx.closePath();
+	ctx.stroke();
+	ctx.restore();
+}
+
+function numberOrZero(param) {
+	return helpers.isNumber(param) ? param : 0;
+}
+
+module.exports = LinearScaleBase.extend({
+	setDimensions: function() {
+		var me = this;
+
+		// Set the unconstrained dimension before label rotation
+		me.width = me.maxWidth;
+		me.height = me.maxHeight;
+		me.paddingTop = getTickBackdropHeight(me.options) / 2;
+		me.xCenter = Math.floor(me.width / 2);
+		me.yCenter = Math.floor((me.height - me.paddingTop) / 2);
+		me.drawingArea = Math.min(me.height - me.paddingTop, me.width) / 2;
+	},
+
+	determineDataLimits: function() {
+		var me = this;
+		var chart = me.chart;
+		var min = Number.POSITIVE_INFINITY;
+		var max = Number.NEGATIVE_INFINITY;
+
+		helpers.each(chart.data.datasets, function(dataset, datasetIndex) {
+			if (chart.isDatasetVisible(datasetIndex)) {
+				var meta = chart.getDatasetMeta(datasetIndex);
+
+				helpers.each(dataset.data, function(rawValue, index) {
+					var value = +me.getRightValue(rawValue);
+					if (isNaN(value) || meta.data[index].hidden) {
+						return;
+					}
+
+					min = Math.min(value, min);
+					max = Math.max(value, max);
+				});
+			}
+		});
+
+		me.min = (min === Number.POSITIVE_INFINITY ? 0 : min);
+		me.max = (max === Number.NEGATIVE_INFINITY ? 0 : max);
+
+		// Common base implementation to handle ticks.min, ticks.max, ticks.beginAtZero
+		me.handleTickRangeOptions();
+	},
+
+	// Returns the maximum number of ticks based on the scale dimension
+	_computeTickLimit: function() {
+		return Math.ceil(this.drawingArea / getTickBackdropHeight(this.options));
+	},
+
+	convertTicksToLabels: function() {
+		var me = this;
+
+		LinearScaleBase.prototype.convertTicksToLabels.call(me);
+
+		// Point labels
+		me.pointLabels = me.chart.data.labels.map(function() {
+			var label = helpers.callback(me.options.pointLabels.callback, arguments, me);
+			return label || label === 0 ? label : '';
+		});
+	},
+
+	getLabelForIndex: function(index, datasetIndex) {
+		return +this.getRightValue(this.chart.data.datasets[datasetIndex].data[index]);
+	},
+
+	fit: function() {
+		var me = this;
+		var opts = me.options;
+
+		if (opts.display && opts.pointLabels.display) {
+			fitWithPointLabels(me);
+		} else {
+			me.setCenterPoint(0, 0, 0, 0);
+		}
+	},
+
+	/**
+	 * Set radius reductions and determine new radius and center point
+	 * @private
+	 */
+	setReductions: function(largestPossibleRadius, furthestLimits, furthestAngles) {
+		var me = this;
+		var radiusReductionLeft = furthestLimits.l / Math.sin(furthestAngles.l);
+		var radiusReductionRight = Math.max(furthestLimits.r - me.width, 0) / Math.sin(furthestAngles.r);
+		var radiusReductionTop = -furthestLimits.t / Math.cos(furthestAngles.t);
+		var radiusReductionBottom = -Math.max(furthestLimits.b - (me.height - me.paddingTop), 0) / Math.cos(furthestAngles.b);
+
+		radiusReductionLeft = numberOrZero(radiusReductionLeft);
+		radiusReductionRight = numberOrZero(radiusReductionRight);
+		radiusReductionTop = numberOrZero(radiusReductionTop);
+		radiusReductionBottom = numberOrZero(radiusReductionBottom);
+
+		me.drawingArea = Math.min(
+			Math.floor(largestPossibleRadius - (radiusReductionLeft + radiusReductionRight) / 2),
+			Math.floor(largestPossibleRadius - (radiusReductionTop + radiusReductionBottom) / 2));
+		me.setCenterPoint(radiusReductionLeft, radiusReductionRight, radiusReductionTop, radiusReductionBottom);
+	},
+
+	setCenterPoint: function(leftMovement, rightMovement, topMovement, bottomMovement) {
+		var me = this;
+		var maxRight = me.width - rightMovement - me.drawingArea;
+		var maxLeft = leftMovement + me.drawingArea;
+		var maxTop = topMovement + me.drawingArea;
+		var maxBottom = (me.height - me.paddingTop) - bottomMovement - me.drawingArea;
+
+		me.xCenter = Math.floor(((maxLeft + maxRight) / 2) + me.left);
+		me.yCenter = Math.floor(((maxTop + maxBottom) / 2) + me.top + me.paddingTop);
+	},
+
+	getIndexAngle: function(index) {
+		var chart = this.chart;
+		var angleMultiplier = 360 / chart.data.labels.length;
+		var options = chart.options || {};
+		var startAngle = options.startAngle || 0;
+
+		// Start from the top instead of right, so remove a quarter of the circle
+		var angle = (index * angleMultiplier + startAngle) % 360;
+
+		return (angle < 0 ? angle + 360 : angle) * Math.PI * 2 / 360;
+	},
+
+	getDistanceFromCenterForValue: function(value) {
+		var me = this;
+
+		if (helpers.isNullOrUndef(value)) {
+			return NaN;
+		}
+
+		// Take into account half font size + the yPadding of the top value
+		var scalingFactor = me.drawingArea / (me.max - me.min);
+		if (me.options.ticks.reverse) {
+			return (me.max - value) * scalingFactor;
+		}
+		return (value - me.min) * scalingFactor;
+	},
+
+	getPointPosition: function(index, distanceFromCenter) {
+		var me = this;
+		var thisAngle = me.getIndexAngle(index) - (Math.PI / 2);
+		return {
+			x: Math.cos(thisAngle) * distanceFromCenter + me.xCenter,
+			y: Math.sin(thisAngle) * distanceFromCenter + me.yCenter
+		};
+	},
+
+	getPointPositionForValue: function(index, value) {
+		return this.getPointPosition(index, this.getDistanceFromCenterForValue(value));
+	},
+
+	getBasePosition: function(index) {
+		var me = this;
+		var min = me.min;
+		var max = me.max;
+
+		return me.getPointPositionForValue(index || 0,
+			me.beginAtZero ? 0 :
+			min < 0 && max < 0 ? max :
+			min > 0 && max > 0 ? min :
+			0);
+	},
+
+	/**
+	 * @private
+	 */
+	_drawGrid: function() {
+		var me = this;
+		var ctx = me.ctx;
+		var opts = me.options;
+		var gridLineOpts = opts.gridLines;
+		var angleLineOpts = opts.angleLines;
+		var lineWidth = valueOrDefault(angleLineOpts.lineWidth, gridLineOpts.lineWidth);
+		var lineColor = valueOrDefault(angleLineOpts.color, gridLineOpts.color);
+		var i, offset, position;
+
+		if (opts.pointLabels.display) {
+			drawPointLabels(me);
+		}
+
+		if (gridLineOpts.display) {
+			helpers.each(me.ticks, function(label, index) {
+				if (index !== 0) {
+					offset = me.getDistanceFromCenterForValue(me.ticksAsNumbers[index]);
+					drawRadiusLine(me, gridLineOpts, offset, index);
+				}
+			});
+		}
+
+		if (angleLineOpts.display && lineWidth && lineColor) {
+			ctx.save();
+			ctx.lineWidth = lineWidth;
+			ctx.strokeStyle = lineColor;
+			if (ctx.setLineDash) {
+				ctx.setLineDash(resolve([angleLineOpts.borderDash, gridLineOpts.borderDash, []]));
+				ctx.lineDashOffset = resolve([angleLineOpts.borderDashOffset, gridLineOpts.borderDashOffset, 0.0]);
+			}
+
+			for (i = me.chart.data.labels.length - 1; i >= 0; i--) {
+				offset = me.getDistanceFromCenterForValue(opts.ticks.reverse ? me.min : me.max);
+				position = me.getPointPosition(i, offset);
+				ctx.beginPath();
+				ctx.moveTo(me.xCenter, me.yCenter);
+				ctx.lineTo(position.x, position.y);
+				ctx.stroke();
+			}
+
+			ctx.restore();
+		}
+	},
+
+	/**
+	 * @private
+	 */
+	_drawLabels: function() {
+		var me = this;
+		var ctx = me.ctx;
+		var opts = me.options;
+		var tickOpts = opts.ticks;
+
+		if (!tickOpts.display) {
+			return;
+		}
+
+		var startAngle = me.getIndexAngle(0);
+		var tickFont = helpers.options._parseFont(tickOpts);
+		var tickFontColor = valueOrDefault(tickOpts.fontColor, defaults.global.defaultFontColor);
+		var offset, width;
+
+		ctx.save();
+		ctx.font = tickFont.string;
+		ctx.translate(me.xCenter, me.yCenter);
+		ctx.rotate(startAngle);
+		ctx.textAlign = 'center';
+		ctx.textBaseline = 'middle';
+
+		helpers.each(me.ticks, function(label, index) {
+			if (index === 0 && !tickOpts.reverse) {
+				return;
+			}
+
+			offset = me.getDistanceFromCenterForValue(me.ticksAsNumbers[index]);
+
+			if (tickOpts.showLabelBackdrop) {
+				width = ctx.measureText(label).width;
+				ctx.fillStyle = tickOpts.backdropColor;
+
+				ctx.fillRect(
+					-width / 2 - tickOpts.backdropPaddingX,
+					-offset - tickFont.size / 2 - tickOpts.backdropPaddingY,
+					width + tickOpts.backdropPaddingX * 2,
+					tickFont.size + tickOpts.backdropPaddingY * 2
+				);
+			}
+
+			ctx.fillStyle = tickFontColor;
+			ctx.fillText(label, 0, -offset);
+		});
+
+		ctx.restore();
+	},
+
+	/**
+	 * @private
+	 */
+	_drawTitle: helpers.noop
+});
+
+// INTERNAL: static default options, registered in src/index.js
+module.exports._defaults = defaultConfig;

web/assets/chart.js/src/scales/scale.time.js

@@ -0,0 +1,764 @@
+'use strict';
+
+var adapters = require('../core/core.adapters');
+var defaults = require('../core/core.defaults');
+var helpers = require('../helpers/index');
+var Scale = require('../core/core.scale');
+
+var deprecated = helpers._deprecated;
+var resolve = helpers.options.resolve;
+var valueOrDefault = helpers.valueOrDefault;
+
+// Integer constants are from the ES6 spec.
+var MIN_INTEGER = Number.MIN_SAFE_INTEGER || -9007199254740991;
+var MAX_INTEGER = Number.MAX_SAFE_INTEGER || 9007199254740991;
+
+var INTERVALS = {
+	millisecond: {
+		common: true,
+		size: 1,
+		steps: 1000
+	},
+	second: {
+		common: true,
+		size: 1000,
+		steps: 60
+	},
+	minute: {
+		common: true,
+		size: 60000,
+		steps: 60
+	},
+	hour: {
+		common: true,
+		size: 3600000,
+		steps: 24
+	},
+	day: {
+		common: true,
+		size: 86400000,
+		steps: 30
+	},
+	week: {
+		common: false,
+		size: 604800000,
+		steps: 4
+	},
+	month: {
+		common: true,
+		size: 2.628e9,
+		steps: 12
+	},
+	quarter: {
+		common: false,
+		size: 7.884e9,
+		steps: 4
+	},
+	year: {
+		common: true,
+		size: 3.154e10
+	}
+};
+
+var UNITS = Object.keys(INTERVALS);
+
+function sorter(a, b) {
+	return a - b;
+}
+
+function arrayUnique(items) {
+	var hash = {};
+	var out = [];
+	var i, ilen, item;
+
+	for (i = 0, ilen = items.length; i < ilen; ++i) {
+		item = items[i];
+		if (!hash[item]) {
+			hash[item] = true;
+			out.push(item);
+		}
+	}
+
+	return out;
+}
+
+function getMin(options) {
+	return helpers.valueOrDefault(options.time.min, options.ticks.min);
+}
+
+function getMax(options) {
+	return helpers.valueOrDefault(options.time.max, options.ticks.max);
+}
+
+/**
+ * Returns an array of {time, pos} objects used to interpolate a specific `time` or position
+ * (`pos`) on the scale, by searching entries before and after the requested value. `pos` is
+ * a decimal between 0 and 1: 0 being the start of the scale (left or top) and 1 the other
+ * extremity (left + width or top + height). Note that it would be more optimized to directly
+ * store pre-computed pixels, but the scale dimensions are not guaranteed at the time we need
+ * to create the lookup table. The table ALWAYS contains at least two items: min and max.
+ *
+ * @param {number[]} timestamps - timestamps sorted from lowest to highest.
+ * @param {string} distribution - If 'linear', timestamps will be spread linearly along the min
+ * and max range, so basically, the table will contains only two items: {min, 0} and {max, 1}.
+ * If 'series', timestamps will be positioned at the same distance from each other. In this
+ * case, only timestamps that break the time linearity are registered, meaning that in the
+ * best case, all timestamps are linear, the table contains only min and max.
+ */
+function buildLookupTable(timestamps, min, max, distribution) {
+	if (distribution === 'linear' || !timestamps.length) {
+		return [
+			{time: min, pos: 0},
+			{time: max, pos: 1}
+		];
+	}
+
+	var table = [];
+	var items = [min];
+	var i, ilen, prev, curr, next;
+
+	for (i = 0, ilen = timestamps.length; i < ilen; ++i) {
+		curr = timestamps[i];
+		if (curr > min && curr < max) {
+			items.push(curr);
+		}
+	}
+
+	items.push(max);
+
+	for (i = 0, ilen = items.length; i < ilen; ++i) {
+		next = items[i + 1];
+		prev = items[i - 1];
+		curr = items[i];
+
+		// only add points that breaks the scale linearity
+		if (prev === undefined || next === undefined || Math.round((next + prev) / 2) !== curr) {
+			table.push({time: curr, pos: i / (ilen - 1)});
+		}
+	}
+
+	return table;
+}
+
+// @see adapted from https://www.anujgakhar.com/2014/03/01/binary-search-in-javascript/
+function lookup(table, key, value) {
+	var lo = 0;
+	var hi = table.length - 1;
+	var mid, i0, i1;
+
+	while (lo >= 0 && lo <= hi) {
+		mid = (lo + hi) >> 1;
+		i0 = table[mid - 1] || null;
+		i1 = table[mid];
+
+		if (!i0) {
+			// given value is outside table (before first item)
+			return {lo: null, hi: i1};
+		} else if (i1[key] < value) {
+			lo = mid + 1;
+		} else if (i0[key] > value) {
+			hi = mid - 1;
+		} else {
+			return {lo: i0, hi: i1};
+		}
+	}
+
+	// given value is outside table (after last item)
+	return {lo: i1, hi: null};
+}
+
+/**
+ * Linearly interpolates the given source `value` using the table items `skey` values and
+ * returns the associated `tkey` value. For example, interpolate(table, 'time', 42, 'pos')
+ * returns the position for a timestamp equal to 42. If value is out of bounds, values at
+ * index [0, 1] or [n - 1, n] are used for the interpolation.
+ */
+function interpolate(table, skey, sval, tkey) {
+	var range = lookup(table, skey, sval);
+
+	// Note: the lookup table ALWAYS contains at least 2 items (min and max)
+	var prev = !range.lo ? table[0] : !range.hi ? table[table.length - 2] : range.lo;
+	var next = !range.lo ? table[1] : !range.hi ? table[table.length - 1] : range.hi;
+
+	var span = next[skey] - prev[skey];
+	var ratio = span ? (sval - prev[skey]) / span : 0;
+	var offset = (next[tkey] - prev[tkey]) * ratio;
+
+	return prev[tkey] + offset;
+}
+
+function toTimestamp(scale, input) {
+	var adapter = scale._adapter;
+	var options = scale.options.time;
+	var parser = options.parser;
+	var format = parser || options.format;
+	var value = input;
+
+	if (typeof parser === 'function') {
+		value = parser(value);
+	}
+
+	// Only parse if its not a timestamp already
+	if (!helpers.isFinite(value)) {
+		value = typeof format === 'string'
+			? adapter.parse(value, format)
+			: adapter.parse(value);
+	}
+
+	if (value !== null) {
+		return +value;
+	}
+
+	// Labels are in an incompatible format and no `parser` has been provided.
+	// The user might still use the deprecated `format` option for parsing.
+	if (!parser && typeof format === 'function') {
+		value = format(input);
+
+		// `format` could return something else than a timestamp, if so, parse it
+		if (!helpers.isFinite(value)) {
+			value = adapter.parse(value);
+		}
+	}
+
+	return value;
+}
+
+function parse(scale, input) {
+	if (helpers.isNullOrUndef(input)) {
+		return null;
+	}
+
+	var options = scale.options.time;
+	var value = toTimestamp(scale, scale.getRightValue(input));
+	if (value === null) {
+		return value;
+	}
+
+	if (options.round) {
+		value = +scale._adapter.startOf(value, options.round);
+	}
+
+	return value;
+}
+
+/**
+ * Figures out what unit results in an appropriate number of auto-generated ticks
+ */
+function determineUnitForAutoTicks(minUnit, min, max, capacity) {
+	var ilen = UNITS.length;
+	var i, interval, factor;
+
+	for (i = UNITS.indexOf(minUnit); i < ilen - 1; ++i) {
+		interval = INTERVALS[UNITS[i]];
+		factor = interval.steps ? interval.steps : MAX_INTEGER;
+
+		if (interval.common && Math.ceil((max - min) / (factor * interval.size)) <= capacity) {
+			return UNITS[i];
+		}
+	}
+
+	return UNITS[ilen - 1];
+}
+
+/**
+ * Figures out what unit to format a set of ticks with
+ */
+function determineUnitForFormatting(scale, numTicks, minUnit, min, max) {
+	var i, unit;
+
+	for (i = UNITS.length - 1; i >= UNITS.indexOf(minUnit); i--) {
+		unit = UNITS[i];
+		if (INTERVALS[unit].common && scale._adapter.diff(max, min, unit) >= numTicks - 1) {
+			return unit;
+		}
+	}
+
+	return UNITS[minUnit ? UNITS.indexOf(minUnit) : 0];
+}
+
+function determineMajorUnit(unit) {
+	for (var i = UNITS.indexOf(unit) + 1, ilen = UNITS.length; i < ilen; ++i) {
+		if (INTERVALS[UNITS[i]].common) {
+			return UNITS[i];
+		}
+	}
+}
+
+/**
+ * Generates a maximum of `capacity` timestamps between min and max, rounded to the
+ * `minor` unit using the given scale time `options`.
+ * Important: this method can return ticks outside the min and max range, it's the
+ * responsibility of the calling code to clamp values if needed.
+ */
+function generate(scale, min, max, capacity) {
+	var adapter = scale._adapter;
+	var options = scale.options;
+	var timeOpts = options.time;
+	var minor = timeOpts.unit || determineUnitForAutoTicks(timeOpts.minUnit, min, max, capacity);
+	var stepSize = resolve([timeOpts.stepSize, timeOpts.unitStepSize, 1]);
+	var weekday = minor === 'week' ? timeOpts.isoWeekday : false;
+	var first = min;
+	var ticks = [];
+	var time;
+
+	// For 'week' unit, handle the first day of week option
+	if (weekday) {
+		first = +adapter.startOf(first, 'isoWeek', weekday);
+	}
+
+	// Align first ticks on unit
+	first = +adapter.startOf(first, weekday ? 'day' : minor);
+
+	// Prevent browser from freezing in case user options request millions of milliseconds
+	if (adapter.diff(max, min, minor) > 100000 * stepSize) {
+		throw min + ' and ' + max + ' are too far apart with stepSize of ' + stepSize + ' ' + minor;
+	}
+
+	for (time = first; time < max; time = +adapter.add(time, stepSize, minor)) {
+		ticks.push(time);
+	}
+
+	if (time === max || options.bounds === 'ticks') {
+		ticks.push(time);
+	}
+
+	return ticks;
+}
+
+/**
+ * Returns the start and end offsets from edges in the form of {start, end}
+ * where each value is a relative width to the scale and ranges between 0 and 1.
+ * They add extra margins on the both sides by scaling down the original scale.
+ * Offsets are added when the `offset` option is true.
+ */
+function computeOffsets(table, ticks, min, max, options) {
+	var start = 0;
+	var end = 0;
+	var first, last;
+
+	if (options.offset && ticks.length) {
+		first = interpolate(table, 'time', ticks[0], 'pos');
+		if (ticks.length === 1) {
+			start = 1 - first;
+		} else {
+			start = (interpolate(table, 'time', ticks[1], 'pos') - first) / 2;
+		}
+		last = interpolate(table, 'time', ticks[ticks.length - 1], 'pos');
+		if (ticks.length === 1) {
+			end = last;
+		} else {
+			end = (last - interpolate(table, 'time', ticks[ticks.length - 2], 'pos')) / 2;
+		}
+	}
+
+	return {start: start, end: end, factor: 1 / (start + 1 + end)};
+}
+
+function setMajorTicks(scale, ticks, map, majorUnit) {
+	var adapter = scale._adapter;
+	var first = +adapter.startOf(ticks[0].value, majorUnit);
+	var last = ticks[ticks.length - 1].value;
+	var major, index;
+
+	for (major = first; major <= last; major = +adapter.add(major, 1, majorUnit)) {
+		index = map[major];
+		if (index >= 0) {
+			ticks[index].major = true;
+		}
+	}
+	return ticks;
+}
+
+function ticksFromTimestamps(scale, values, majorUnit) {
+	var ticks = [];
+	var map = {};
+	var ilen = values.length;
+	var i, value;
+
+	for (i = 0; i < ilen; ++i) {
+		value = values[i];
+		map[value] = i;
+
+		ticks.push({
+			value: value,
+			major: false
+		});
+	}
+
+	// We set the major ticks separately from the above loop because calling startOf for every tick
+	// is expensive when there is a large number of ticks
+	return (ilen === 0 || !majorUnit) ? ticks : setMajorTicks(scale, ticks, map, majorUnit);
+}
+
+var defaultConfig = {
+	position: 'bottom',
+
+	/**
+	 * Data distribution along the scale:
+	 * - 'linear': data are spread according to their time (distances can vary),
+	 * - 'series': data are spread at the same distance from each other.
+	 * @see https://github.com/chartjs/Chart.js/pull/4507
+	 * @since 2.7.0
+	 */
+	distribution: 'linear',
+
+	/**
+	 * Scale boundary strategy (bypassed by min/max time options)
+	 * - `data`: make sure data are fully visible, ticks outside are removed
+	 * - `ticks`: make sure ticks are fully visible, data outside are truncated
+	 * @see https://github.com/chartjs/Chart.js/pull/4556
+	 * @since 2.7.0
+	 */
+	bounds: 'data',
+
+	adapters: {},
+	time: {
+		parser: false, // false == a pattern string from https://momentjs.com/docs/#/parsing/string-format/ or a custom callback that converts its argument to a moment
+		unit: false, // false == automatic or override with week, month, year, etc.
+		round: false, // none, or override with week, month, year, etc.
+		displayFormat: false, // DEPRECATED
+		isoWeekday: false, // override week start day - see https://momentjs.com/docs/#/get-set/iso-weekday/
+		minUnit: 'millisecond',
+		displayFormats: {}
+	},
+	ticks: {
+		autoSkip: false,
+
+		/**
+		 * Ticks generation input values:
+		 * - 'auto': generates "optimal" ticks based on scale size and time options.
+		 * - 'data': generates ticks from data (including labels from data {t|x|y} objects).
+		 * - 'labels': generates ticks from user given `data.labels` values ONLY.
+		 * @see https://github.com/chartjs/Chart.js/pull/4507
+		 * @since 2.7.0
+		 */
+		source: 'auto',
+
+		major: {
+			enabled: false
+		}
+	}
+};
+
+module.exports = Scale.extend({
+	initialize: function() {
+		this.mergeTicksOptions();
+		Scale.prototype.initialize.call(this);
+	},
+
+	update: function() {
+		var me = this;
+		var options = me.options;
+		var time = options.time || (options.time = {});
+		var adapter = me._adapter = new adapters._date(options.adapters.date);
+
+		// DEPRECATIONS: output a message only one time per update
+		deprecated('time scale', time.format, 'time.format', 'time.parser');
+		deprecated('time scale', time.min, 'time.min', 'ticks.min');
+		deprecated('time scale', time.max, 'time.max', 'ticks.max');
+
+		// Backward compatibility: before introducing adapter, `displayFormats` was
+		// supposed to contain *all* unit/string pairs but this can't be resolved
+		// when loading the scale (adapters are loaded afterward), so let's populate
+		// missing formats on update
+		helpers.mergeIf(time.displayFormats, adapter.formats());
+
+		return Scale.prototype.update.apply(me, arguments);
+	},
+
+	/**
+	 * Allows data to be referenced via 't' attribute
+	 */
+	getRightValue: function(rawValue) {
+		if (rawValue && rawValue.t !== undefined) {
+			rawValue = rawValue.t;
+		}
+		return Scale.prototype.getRightValue.call(this, rawValue);
+	},
+
+	determineDataLimits: function() {
+		var me = this;
+		var chart = me.chart;
+		var adapter = me._adapter;
+		var options = me.options;
+		var unit = options.time.unit || 'day';
+		var min = MAX_INTEGER;
+		var max = MIN_INTEGER;
+		var timestamps = [];
+		var datasets = [];
+		var labels = [];
+		var i, j, ilen, jlen, data, timestamp, labelsAdded;
+		var dataLabels = me._getLabels();
+
+		for (i = 0, ilen = dataLabels.length; i < ilen; ++i) {
+			labels.push(parse(me, dataLabels[i]));
+		}
+
+		for (i = 0, ilen = (chart.data.datasets || []).length; i < ilen; ++i) {
+			if (chart.isDatasetVisible(i)) {
+				data = chart.data.datasets[i].data;
+
+				// Let's consider that all data have the same format.
+				if (helpers.isObject(data[0])) {
+					datasets[i] = [];
+
+					for (j = 0, jlen = data.length; j < jlen; ++j) {
+						timestamp = parse(me, data[j]);
+						timestamps.push(timestamp);
+						datasets[i][j] = timestamp;
+					}
+				} else {
+					datasets[i] = labels.slice(0);
+					if (!labelsAdded) {
+						timestamps = timestamps.concat(labels);
+						labelsAdded = true;
+					}
+				}
+			} else {
+				datasets[i] = [];
+			}
+		}
+
+		if (labels.length) {
+			min = Math.min(min, labels[0]);
+			max = Math.max(max, labels[labels.length - 1]);
+		}
+
+		if (timestamps.length) {
+			timestamps = ilen > 1 ? arrayUnique(timestamps).sort(sorter) : timestamps.sort(sorter);
+			min = Math.min(min, timestamps[0]);
+			max = Math.max(max, timestamps[timestamps.length - 1]);
+		}
+
+		min = parse(me, getMin(options)) || min;
+		max = parse(me, getMax(options)) || max;
+
+		// In case there is no valid min/max, set limits based on unit time option
+		min = min === MAX_INTEGER ? +adapter.startOf(Date.now(), unit) : min;
+		max = max === MIN_INTEGER ? +adapter.endOf(Date.now(), unit) + 1 : max;
+
+		// Make sure that max is strictly higher than min (required by the lookup table)
+		me.min = Math.min(min, max);
+		me.max = Math.max(min + 1, max);
+
+		// PRIVATE
+		me._table = [];
+		me._timestamps = {
+			data: timestamps,
+			datasets: datasets,
+			labels: labels
+		};
+	},
+
+	buildTicks: function() {
+		var me = this;
+		var min = me.min;
+		var max = me.max;
+		var options = me.options;
+		var tickOpts = options.ticks;
+		var timeOpts = options.time;
+		var timestamps = me._timestamps;
+		var ticks = [];
+		var capacity = me.getLabelCapacity(min);
+		var source = tickOpts.source;
+		var distribution = options.distribution;
+		var i, ilen, timestamp;
+
+		if (source === 'data' || (source === 'auto' && distribution === 'series')) {
+			timestamps = timestamps.data;
+		} else if (source === 'labels') {
+			timestamps = timestamps.labels;
+		} else {
+			timestamps = generate(me, min, max, capacity, options);
+		}
+
+		if (options.bounds === 'ticks' && timestamps.length) {
+			min = timestamps[0];
+			max = timestamps[timestamps.length - 1];
+		}
+
+		// Enforce limits with user min/max options
+		min = parse(me, getMin(options)) || min;
+		max = parse(me, getMax(options)) || max;
+
+		// Remove ticks outside the min/max range
+		for (i = 0, ilen = timestamps.length; i < ilen; ++i) {
+			timestamp = timestamps[i];
+			if (timestamp >= min && timestamp <= max) {
+				ticks.push(timestamp);
+			}
+		}
+
+		me.min = min;
+		me.max = max;
+
+		// PRIVATE
+		// determineUnitForFormatting relies on the number of ticks so we don't use it when
+		// autoSkip is enabled because we don't yet know what the final number of ticks will be
+		me._unit = timeOpts.unit || (tickOpts.autoSkip
+			? determineUnitForAutoTicks(timeOpts.minUnit, me.min, me.max, capacity)
+			: determineUnitForFormatting(me, ticks.length, timeOpts.minUnit, me.min, me.max));
+		me._majorUnit = !tickOpts.major.enabled || me._unit === 'year' ? undefined
+			: determineMajorUnit(me._unit);
+		me._table = buildLookupTable(me._timestamps.data, min, max, distribution);
+		me._offsets = computeOffsets(me._table, ticks, min, max, options);
+
+		if (tickOpts.reverse) {
+			ticks.reverse();
+		}
+
+		return ticksFromTimestamps(me, ticks, me._majorUnit);
+	},
+
+	getLabelForIndex: function(index, datasetIndex) {
+		var me = this;
+		var adapter = me._adapter;
+		var data = me.chart.data;
+		var timeOpts = me.options.time;
+		var label = data.labels && index < data.labels.length ? data.labels[index] : '';
+		var value = data.datasets[datasetIndex].data[index];
+
+		if (helpers.isObject(value)) {
+			label = me.getRightValue(value);
+		}
+		if (timeOpts.tooltipFormat) {
+			return adapter.format(toTimestamp(me, label), timeOpts.tooltipFormat);
+		}
+		if (typeof label === 'string') {
+			return label;
+		}
+		return adapter.format(toTimestamp(me, label), timeOpts.displayFormats.datetime);
+	},
+
+	/**
+	 * Function to format an individual tick mark
+	 * @private
+	 */
+	tickFormatFunction: function(time, index, ticks, format) {
+		var me = this;
+		var adapter = me._adapter;
+		var options = me.options;
+		var formats = options.time.displayFormats;
+		var minorFormat = formats[me._unit];
+		var majorUnit = me._majorUnit;
+		var majorFormat = formats[majorUnit];
+		var tick = ticks[index];
+		var tickOpts = options.ticks;
+		var major = majorUnit && majorFormat && tick && tick.major;
+		var label = adapter.format(time, format ? format : major ? majorFormat : minorFormat);
+		var nestedTickOpts = major ? tickOpts.major : tickOpts.minor;
+		var formatter = resolve([
+			nestedTickOpts.callback,
+			nestedTickOpts.userCallback,
+			tickOpts.callback,
+			tickOpts.userCallback
+		]);
+
+		return formatter ? formatter(label, index, ticks) : label;
+	},
+
+	convertTicksToLabels: function(ticks) {
+		var labels = [];
+		var i, ilen;
+
+		for (i = 0, ilen = ticks.length; i < ilen; ++i) {
+			labels.push(this.tickFormatFunction(ticks[i].value, i, ticks));
+		}
+
+		return labels;
+	},
+
+	/**
+	 * @private
+	 */
+	getPixelForOffset: function(time) {
+		var me = this;
+		var offsets = me._offsets;
+		var pos = interpolate(me._table, 'time', time, 'pos');
+		return me.getPixelForDecimal((offsets.start + pos) * offsets.factor);
+	},
+
+	getPixelForValue: function(value, index, datasetIndex) {
+		var me = this;
+		var time = null;
+
+		if (index !== undefined && datasetIndex !== undefined) {
+			time = me._timestamps.datasets[datasetIndex][index];
+		}
+
+		if (time === null) {
+			time = parse(me, value);
+		}
+
+		if (time !== null) {
+			return me.getPixelForOffset(time);
+		}
+	},
+
+	getPixelForTick: function(index) {
+		var ticks = this.getTicks();
+		return index >= 0 && index < ticks.length ?
+			this.getPixelForOffset(ticks[index].value) :
+			null;
+	},
+
+	getValueForPixel: function(pixel) {
+		var me = this;
+		var offsets = me._offsets;
+		var pos = me.getDecimalForPixel(pixel) / offsets.factor - offsets.end;
+		var time = interpolate(me._table, 'pos', pos, 'time');
+
+		// DEPRECATION, we should return time directly
+		return me._adapter._create(time);
+	},
+
+	/**
+	 * @private
+	 */
+	_getLabelSize: function(label) {
+		var me = this;
+		var ticksOpts = me.options.ticks;
+		var tickLabelWidth = me.ctx.measureText(label).width;
+		var angle = helpers.toRadians(me.isHorizontal() ? ticksOpts.maxRotation : ticksOpts.minRotation);
+		var cosRotation = Math.cos(angle);
+		var sinRotation = Math.sin(angle);
+		var tickFontSize = valueOrDefault(ticksOpts.fontSize, defaults.global.defaultFontSize);
+
+		return {
+			w: (tickLabelWidth * cosRotation) + (tickFontSize * sinRotation),
+			h: (tickLabelWidth * sinRotation) + (tickFontSize * cosRotation)
+		};
+	},
+
+	/**
+	 * Crude approximation of what the label width might be
+	 * @private
+	 */
+	getLabelWidth: function(label) {
+		return this._getLabelSize(label).w;
+	},
+
+	/**
+	 * @private
+	 */
+	getLabelCapacity: function(exampleTime) {
+		var me = this;
+		var timeOpts = me.options.time;
+		var displayFormats = timeOpts.displayFormats;
+
+		// pick the longest format (milliseconds) for guestimation
+		var format = displayFormats[timeOpts.unit] || displayFormats.millisecond;
+		var exampleLabel = me.tickFormatFunction(exampleTime, 0, ticksFromTimestamps(me, [exampleTime], me._majorUnit), format);
+		var size = me._getLabelSize(exampleLabel);
+		var capacity = Math.floor(me.isHorizontal() ? me.width / size.w : me.height / size.h);
+
+		if (me.options.offset) {
+			capacity--;
+		}
+
+		return capacity > 0 ? capacity : 1;
+	}
+});
+
+// INTERNAL: static default options, registered in src/index.js
+module.exports._defaults = defaultConfig;