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/**
* @license Highcharts JS v7.1.1 (2019-04-09)
*
* (c) 2009-2019 Torstein Honsi
*
* License: www.highcharts.com/license
*/
'use strict';
(function (factory) {
if (typeof module === 'object' && module.exports) {
factory['default'] = factory;
module.exports = factory;
} else if (typeof define === 'function' && define.amd) {
define('highcharts/modules/series-label', ['highcharts'], function (Highcharts) {
factory(Highcharts);
factory.Highcharts = Highcharts;
return factory;
});
} else {
factory(typeof Highcharts !== 'undefined' ? Highcharts : undefined);
}
}(function (Highcharts) {
var _modules = Highcharts ? Highcharts._modules : {};
function _registerModule(obj, path, args, fn) {
if (!obj.hasOwnProperty(path)) {
obj[path] = fn.apply(null, args);
}
}
_registerModule(_modules, 'modules/series-label.src.js', [_modules['parts/Globals.js']], function (H) {
/**
* (c) 2009-2019 Torstein Honsi
*
* License: www.highcharts.com/license
*/
/**
* Containing the position of a box that should be avoided by labels.
*
* @interface Highcharts.LabelIntersectBoxObject
*//**
* @name Highcharts.LabelIntersectBoxObject#bottom
* @type {number}
*//**
* @name Highcharts.LabelIntersectBoxObject#left
* @type {number}
*//**
* @name Highcharts.LabelIntersectBoxObject#right
* @type {number}
*//**
* @name Highcharts.LabelIntersectBoxObject#top
* @type {number}
*/
/*
* Highcharts module to place labels next to a series in a natural position.
*
* TODO:
* - add column support (box collision detection, boxesToAvoid logic)
* - avoid data labels, when data labels above, show series label below.
* - add more options (connector, format, formatter)
*
* https://jsfiddle.net/highcharts/L2u9rpwr/
* https://jsfiddle.net/highcharts/y5A37/
* https://jsfiddle.net/highcharts/264Nm/
* https://jsfiddle.net/highcharts/y5A37/
*/
var labelDistance = 3,
addEvent = H.addEvent,
extend = H.extend,
isNumber = H.isNumber,
pick = H.pick,
Series = H.Series,
SVGRenderer = H.SVGRenderer,
Chart = H.Chart;
H.setOptions({
/**
* @optionparent plotOptions
*/
plotOptions: {
series: {
/**
* Series labels are placed as close to the series as possible in a
* natural way, seeking to avoid other series. The goal of this
* feature is to make the chart more easily readable, like if a
* human designer placed the labels in the optimal position.
*
* The series labels currently work with series types having a
* `graph` or an `area`.
*
* Requires the `series-label.js` module.
*
* @sample highcharts/series-label/line-chart
* Line chart
* @sample highcharts/demo/streamgraph
* Stream graph
* @sample highcharts/series-label/stock-chart
* Stock chart
*
* @since 6.0.0
* @product highcharts highstock gantt
*/
label: {
/**
* Enable the series label per series.
*/
enabled: true,
/**
* Allow labels to be placed distant to the graph if necessary,
* and draw a connector line to the graph. Setting this option
* to true may decrease the performance significantly, since the
* algorithm with systematically search for open spaces in the
* whole plot area. Visually, it may also result in a more
* cluttered chart, though more of the series will be labeled.
*/
connectorAllowed: false,
/**
* If the label is closer than this to a neighbour graph, draw a
* connector.
*/
connectorNeighbourDistance: 24,
/**
* For area-like series, allow the font size to vary so that
* small areas get a smaller font size. The default applies this
* effect to area-like series but not line-like series.
*
* @type {number|null}
*/
minFontSize: null,
/**
* For area-like series, allow the font size to vary so that
* small areas get a smaller font size. The default applies this
* effect to area-like series but not line-like series.
*
* @type {number|null}
*/
maxFontSize: null,
/**
* Draw the label on the area of an area series. By default it
* is drawn on the area. Set it to `false` to draw it next to
* the graph instead.
*
* @type {boolean|null}
*/
onArea: null,
/**
* Styles for the series label. The color defaults to the series
* color, or a contrast color if `onArea`.
*
* @type {Highcharts.CSSObject}
* @default {"font-weight": "bold"}
*/
style: {
/**
* @ignore
*/
fontWeight: 'bold'
},
/**
* An array of boxes to avoid when laying out the labels. Each
* item has a `left`, `right`, `top` and `bottom` property.
*
* @type {Array<Highcharts.LabelIntersectBoxObject>}
*/
boxesToAvoid: []
}
}
}
});
/**
* Counter-clockwise, part of the fast line intersection logic.
*
* @private
* @function ccw
*
* @param {number} x1
*
* @param {number} y1
*
* @param {number} x2
*
* @param {number} y2
*
* @param {number} x3
*
* @param {number} y3
*
* @return {boolean}
*/
function ccw(x1, y1, x2, y2, x3, y3) {
var cw = ((y3 - y1) * (x2 - x1)) - ((y2 - y1) * (x3 - x1));
return cw > 0 ? true : !(cw < 0);
}
/**
* Detect if two lines intersect.
*
* @private
* @function ccw
*
* @param {number} x1
*
* @param {number} y1
*
* @param {number} x2
*
* @param {number} y2
*
* @param {number} x3
*
* @param {number} y3
*
* @param {number} x4
*
* @param {number} y4
*
* @return {boolean}
*/
function intersectLine(x1, y1, x2, y2, x3, y3, x4, y4) {
return ccw(x1, y1, x3, y3, x4, y4) !== ccw(x2, y2, x3, y3, x4, y4) &&
ccw(x1, y1, x2, y2, x3, y3) !== ccw(x1, y1, x2, y2, x4, y4);
}
/**
* Detect if a box intersects with a line.
*
* @private
* @function boxIntersectLine
*
* @param {number} x
*
* @param {number} y
*
* @param {number} w
*
* @param {number} h
*
* @param {number} x1
*
* @param {number} y1
*
* @param {number} x2
*
* @param {number} y2
*
* @return {boolean}
*/
function boxIntersectLine(x, y, w, h, x1, y1, x2, y2) {
return (
intersectLine(x, y, x + w, y, x1, y1, x2, y2) || // top of label
intersectLine(x + w, y, x + w, y + h, x1, y1, x2, y2) || // right
intersectLine(x, y + h, x + w, y + h, x1, y1, x2, y2) || // bottom
intersectLine(x, y, x, y + h, x1, y1, x2, y2) // left of label
);
}
/**
* General symbol definition for labels with connector.
*
* @private
* @function Highcharts.SVGRenderer#symbols.connector
*
* @param {number} x
*
* @param {number} y
*
* @param {number} w
*
* @param {number} h
*
* @param {Highcharts.SymbolOptionsObject} options
*
* @return {Highcharts.SVGPathArray}
*/
SVGRenderer.prototype.symbols.connector = function (x, y, w, h, options) {
var anchorX = options && options.anchorX,
anchorY = options && options.anchorY,
path,
yOffset,
lateral = w / 2;
if (isNumber(anchorX) && isNumber(anchorY)) {
path = ['M', anchorX, anchorY];
// Prefer 45 deg connectors
yOffset = y - anchorY;
if (yOffset < 0) {
yOffset = -h - yOffset;
}
if (yOffset < w) {
lateral = anchorX < x + (w / 2) ? yOffset : w - yOffset;
}
// Anchor below label
if (anchorY > y + h) {
path.push('L', x + lateral, y + h);
// Anchor above label
} else if (anchorY < y) {
path.push('L', x + lateral, y);
// Anchor left of label
} else if (anchorX < x) {
path.push('L', x, y + h / 2);
// Anchor right of label
} else if (anchorX > x + w) {
path.push('L', x + w, y + h / 2);
}
}
return path || [];
};
/**
* Points to avoid. In addition to actual data points, the label should avoid
* interpolated positions.
*
* @private
* @function Highcharts.Series#getPointsOnGraph
*
* @return {Array<Highcharts.Point>}
*/
Series.prototype.getPointsOnGraph = function () {
if (!this.xAxis && !this.yAxis) {
return;
}
var distance = 16,
points = this.points,
point,
last,
interpolated = [],
i,
deltaX,
deltaY,
delta,
len,
n,
j,
d,
graph = this.graph || this.area,
node = graph.element,
inverted = this.chart.inverted,
xAxis = this.xAxis,
yAxis = this.yAxis,
paneLeft = inverted ? yAxis.pos : xAxis.pos,
paneTop = inverted ? xAxis.pos : yAxis.pos,
onArea = pick(this.options.label.onArea, !!this.area),
translatedThreshold = yAxis.getThreshold(this.options.threshold),
grid = {};
// Push the point to the interpolated points, but only if that position in
// the grid has not been occupied. As a performance optimization, we divide
// the plot area into a grid and only add one point per series (#9815).
function pushDiscrete(point) {
var cellSize = 8,
key = Math.round(point.plotX / cellSize) + ',' +
Math.round(point.plotY / cellSize);
if (!grid[key]) {
grid[key] = 1;
interpolated.push(point);
}
}
// For splines, get the point at length (possible caveat: peaks are not
// correctly detected)
if (
this.getPointSpline &&
node.getPointAtLength &&
!onArea &&
// Not performing well on complex series, node.getPointAtLength is too
// heavy (#9815)
points.length < this.chart.plotSizeX / distance
) {
// If it is animating towards a path definition, use that briefly, and
// reset
if (graph.toD) {
d = graph.attr('d');
graph.attr({ d: graph.toD });
}
len = node.getTotalLength();
for (i = 0; i < len; i += distance) {
point = node.getPointAtLength(i);
pushDiscrete({
chartX: paneLeft + point.x,
chartY: paneTop + point.y,
plotX: point.x,
plotY: point.y
});
}
if (d) {
graph.attr({ d: d });
}
// Last point
point = points[points.length - 1];
point.chartX = paneLeft + point.plotX;
point.chartY = paneTop + point.plotY;
pushDiscrete(point);
// Interpolate
} else {
len = points.length;
for (i = 0; i < len; i += 1) {
point = points[i];
last = points[i - 1];
// Absolute coordinates so we can compare different panes
point.chartX = paneLeft + point.plotX;
point.chartY = paneTop + point.plotY;
if (onArea) {
// Vertically centered inside area
point.chartCenterY = paneTop + (
point.plotY +
pick(point.yBottom, translatedThreshold)
) / 2;
}
// Add interpolated points
if (i > 0) {
deltaX = Math.abs(point.chartX - last.chartX);
deltaY = Math.abs(point.chartY - last.chartY);
delta = Math.max(deltaX, deltaY);
if (delta > distance) {
n = Math.ceil(delta / distance);
for (j = 1; j < n; j += 1) {
pushDiscrete({
chartX: last.chartX +
(point.chartX - last.chartX) * (j / n),
chartY: last.chartY +
(point.chartY - last.chartY) * (j / n),
chartCenterY: last.chartCenterY +
(point.chartCenterY - last.chartCenterY) *
(j / n),
plotX: last.plotX +
(point.plotX - last.plotX) * (j / n),
plotY: last.plotY +
(point.plotY - last.plotY) * (j / n)
});
}
}
}
// Add the real point in order to find positive and negative peaks
if (isNumber(point.plotY)) {
pushDiscrete(point);
}
}
}
// Get the bounding box so we can do a quick check first if the bounding
// boxes overlap.
/*
interpolated.bBox = node.getBBox();
interpolated.bBox.x += paneLeft;
interpolated.bBox.y += paneTop;
*/
return interpolated;
};
/**
* Overridable function to return series-specific font sizes for the labels. By
* default it returns bigger font sizes for series with the greater sum of y
* values.
*
* @private
* @function Highcharts.Series#labelFontSize
*
* @param {number} minFontSize
*
* @param {number} maxFontSize
*
* @return {string}
*/
Series.prototype.labelFontSize = function (minFontSize, maxFontSize) {
return minFontSize + (
(this.sum / this.chart.labelSeriesMaxSum) *
(maxFontSize - minFontSize)
) + 'px';
};
/**
* Check whether a proposed label position is clear of other elements.
*
* @private
* @function Highcharts.Series#checkClearPoint
*
* @param {number} x
*
* @param {number} y
*
* @param {Highcharts.BBoxObject}
*
* @param {boolean} [checkDistance]
*
* @return {false|*}
*/
Series.prototype.checkClearPoint = function (x, y, bBox, checkDistance) {
var distToOthersSquared = Number.MAX_VALUE, // distance to other graphs
distToPointSquared = Number.MAX_VALUE,
dist,
connectorPoint,
onArea = pick(this.options.label.onArea, !!this.area),
findDistanceToOthers = onArea || this.options.label.connectorAllowed,
chart = this.chart,
series,
points,
leastDistance = 16,
withinRange,
xDist,
yDist,
i,
j;
function intersectRect(r1, r2) {
return !(r2.left > r1.right ||
r2.right < r1.left ||
r2.top > r1.bottom ||
r2.bottom < r1.top);
}
/**
* Get the weight in order to determine the ideal position. Larger distance
* to other series gives more weight. Smaller distance to the actual point
* (connector points only) gives more weight.
*/
function getWeight(distToOthersSquared, distToPointSquared) {
return distToOthersSquared - distToPointSquared;
}
// First check for collision with existing labels
for (i = 0; i < chart.boxesToAvoid.length; i += 1) {
if (intersectRect(chart.boxesToAvoid[i], {
left: x,
right: x + bBox.width,
top: y,
bottom: y + bBox.height
})) {
return false;
}
}
// For each position, check if the lines around the label intersect with any
// of the graphs.
for (i = 0; i < chart.series.length; i += 1) {
series = chart.series[i];
points = series.interpolatedPoints;
if (series.visible && points) {
for (j = 1; j < points.length; j += 1) {
if (
// To avoid processing, only check intersection if the X
// values are close to the box.
points[j].chartX >= x - leastDistance &&
points[j - 1].chartX <= x + bBox.width + leastDistance
) {
// If any of the box sides intersect with the line, return.
if (boxIntersectLine(
x,
y,
bBox.width,
bBox.height,
points[j - 1].chartX,
points[j - 1].chartY,
points[j].chartX,
points[j].chartY
)) {
return false;
}
// But if it is too far away (a padded box doesn't
// intersect), also return.
if (this === series && !withinRange && checkDistance) {
withinRange = boxIntersectLine(
x - leastDistance,
y - leastDistance,
bBox.width + 2 * leastDistance,
bBox.height + 2 * leastDistance,
points[j - 1].chartX,
points[j - 1].chartY,
points[j].chartX,
points[j].chartY
);
}
}
// Find the squared distance from the center of the label. On
// area series, avoid its own graph.
if (
(findDistanceToOthers || withinRange) &&
(this !== series || onArea)
) {
xDist = x + bBox.width / 2 - points[j].chartX;
yDist = y + bBox.height / 2 - points[j].chartY;
distToOthersSquared = Math.min(
distToOthersSquared,
xDist * xDist + yDist * yDist
);
}
}
// Do we need a connector?
if (
!onArea &&
findDistanceToOthers &&
this === series &&
(
(checkDistance && !withinRange) ||
distToOthersSquared < Math.pow(
this.options.label.connectorNeighbourDistance,
2
)
)
) {
for (j = 1; j < points.length; j += 1) {
dist = Math.min(
(
Math.pow(x + bBox.width / 2 - points[j].chartX, 2) +
Math.pow(y + bBox.height / 2 - points[j].chartY, 2)
),
(
Math.pow(x - points[j].chartX, 2) +
Math.pow(y - points[j].chartY, 2)
),
(
Math.pow(x + bBox.width - points[j].chartX, 2) +
Math.pow(y - points[j].chartY, 2)
),
(
Math.pow(x + bBox.width - points[j].chartX, 2) +
Math.pow(y + bBox.height - points[j].chartY, 2)
),
(
Math.pow(x - points[j].chartX, 2) +
Math.pow(y + bBox.height - points[j].chartY, 2)
)
);
if (dist < distToPointSquared) {
distToPointSquared = dist;
connectorPoint = points[j];
}
}
withinRange = true;
}
}
}
return !checkDistance || withinRange ? {
x: x,
y: y,
weight: getWeight(
distToOthersSquared,
connectorPoint ? distToPointSquared : 0
),
connectorPoint: connectorPoint
} : false;
};
/**
* The main initialize method that runs on chart level after initialization and
* redraw. It runs in a timeout to prevent locking, and loops over all series,
* taking all series and labels into account when placing the labels.
*
* @private
* @function Highcharts.Chart#drawSeriesLabels
*/
Chart.prototype.drawSeriesLabels = function () {
// console.time('drawSeriesLabels');
var chart = this,
labelSeries = this.labelSeries;
chart.boxesToAvoid = [];
// Build the interpolated points
labelSeries.forEach(function (series) {
series.interpolatedPoints = series.getPointsOnGraph();
(series.options.label.boxesToAvoid || []).forEach(function (box) {
chart.boxesToAvoid.push(box);
});
});
chart.series.forEach(function (series) {
if (!series.xAxis && !series.yAxis) {
return;
}
var bBox,
x,
y,
results = [],
clearPoint,
i,
best,
labelOptions = series.options.label,
inverted = chart.inverted,
paneLeft = inverted ? series.yAxis.pos : series.xAxis.pos,
paneTop = inverted ? series.xAxis.pos : series.yAxis.pos,
paneWidth = chart.inverted ? series.yAxis.len : series.xAxis.len,
paneHeight = chart.inverted ? series.xAxis.len : series.yAxis.len,
points = series.interpolatedPoints,
onArea = pick(labelOptions.onArea, !!series.area),
label = series.labelBySeries,
minFontSize = labelOptions.minFontSize,
maxFontSize = labelOptions.maxFontSize,
dataExtremes,
areaMin,
areaMax;
// Stay within the area data bounds (#10038)
if (onArea && !inverted) {
dataExtremes = [
series.xAxis.toPixels(series.xData[0]),
series.xAxis.toPixels(
series.xData[series.xData.length - 1]
)
];
areaMin = Math.min.apply(Math, dataExtremes);
areaMax = Math.max.apply(Math, dataExtremes);
}
function insidePane(x, y, bBox) {
var leftBound = Math.max(paneLeft, pick(areaMin, -Infinity)),
rightBound = Math.min(
paneLeft + paneWidth,
pick(areaMax, Infinity)
);
return (
x > leftBound &&
x <= rightBound - bBox.width &&
y >= paneTop &&
y <= paneTop + paneHeight - bBox.height
);
}
function destroyLabel() {
if (label) {
series.labelBySeries = label.destroy();
}
}
if (series.visible && !series.isSeriesBoosting && points) {
if (!label) {
series.labelBySeries = label = chart.renderer
.label(series.name, 0, -9999, 'connector')
.addClass(
'highcharts-series-label ' +
'highcharts-series-label-' + series.index + ' ' +
(series.options.className || '')
)
.css(extend({
color: onArea ?
chart.renderer.getContrast(series.color) :
series.color
}, series.options.label.style));
// Adapt label sizes to the sum of the data
if (minFontSize && maxFontSize) {
label.css({
fontSize: series.labelFontSize(minFontSize, maxFontSize)
});
}
label
.attr({
padding: 0,
opacity: chart.renderer.forExport ? 1 : 0,
stroke: series.color,
'stroke-width': 1,
zIndex: 3
})
.add()
.animate({ opacity: 1 }, { duration: 200 });
}
bBox = label.getBBox();
bBox.width = Math.round(bBox.width);
// Ideal positions are centered above or below a point on right side
// of chart
for (i = points.length - 1; i > 0; i -= 1) {
if (onArea) {
// Centered
x = points[i].chartX - bBox.width / 2;
y = points[i].chartCenterY - bBox.height / 2;
if (insidePane(x, y, bBox)) {
best = series.checkClearPoint(
x,
y,
bBox
);
}
if (best) {
results.push(best);
}
} else {
// Right - up
x = points[i].chartX + labelDistance;
y = points[i].chartY - bBox.height - labelDistance;
if (insidePane(x, y, bBox)) {
best = series.checkClearPoint(
x,
y,
bBox,
true
);
}
if (best) {
results.push(best);
}
// Right - down
x = points[i].chartX + labelDistance;
y = points[i].chartY + labelDistance;
if (insidePane(x, y, bBox)) {
best = series.checkClearPoint(
x,
y,
bBox,
true
);
}
if (best) {
results.push(best);
}
// Left - down
x = points[i].chartX - bBox.width - labelDistance;
y = points[i].chartY + labelDistance;
if (insidePane(x, y, bBox)) {
best = series.checkClearPoint(
x,
y,
bBox,
true
);
}
if (best) {
results.push(best);
}
// Left - up
x = points[i].chartX - bBox.width - labelDistance;
y = points[i].chartY - bBox.height - labelDistance;
if (insidePane(x, y, bBox)) {
best = series.checkClearPoint(
x,
y,
bBox,
true
);
}
if (best) {
results.push(best);
}
}
}
// Brute force, try all positions on the chart in a 16x16 grid
if (labelOptions.connectorAllowed && !results.length && !onArea) {
for (
x = paneLeft + paneWidth - bBox.width;
x >= paneLeft;
x -= 16
) {
for (
y = paneTop;
y < paneTop + paneHeight - bBox.height;
y += 16
) {
clearPoint = series.checkClearPoint(x, y, bBox, true);
if (clearPoint) {
results.push(clearPoint);
}
}
}
}
if (results.length) {
results.sort(function (a, b) {
return b.weight - a.weight;
});
best = results[0];
chart.boxesToAvoid.push({
left: best.x,
right: best.x + bBox.width,
top: best.y,
bottom: best.y + bBox.height
});
// Move it if needed
var dist = Math.sqrt(
Math.pow(Math.abs(best.x - label.x), 2),
Math.pow(Math.abs(best.y - label.y), 2)
);
if (dist) {
// Move fast and fade in - pure animation movement is
// distractive...
var attr = {
opacity: chart.renderer.forExport ? 1 : 0,
x: best.x,
y: best.y
},
anim = {
opacity: 1
};
// ... unless we're just moving a short distance
if (dist <= 10) {
anim = {
x: attr.x,
y: attr.y
};
attr = {};
}
series.labelBySeries
.attr(extend(attr, {
anchorX: best.connectorPoint &&
best.connectorPoint.plotX + paneLeft,
anchorY: best.connectorPoint &&
best.connectorPoint.plotY + paneTop
}))
.animate(anim);
// Record closest point to stick to for sync redraw
series.options.kdNow = true;
series.buildKDTree();
var closest = series.searchPoint({
chartX: best.x,
chartY: best.y
}, true);
label.closest = [
closest,
best.x - closest.plotX,
best.y - closest.plotY
];
}
} else {
destroyLabel();
}
} else {
destroyLabel();
}
});
H.fireEvent(chart, 'afterDrawSeriesLabels');
// console.timeEnd('drawSeriesLabels');
};
/**
* Prepare drawing series labels.
*
* @private
* @function drawLabels
*/
function drawLabels(e) {
var chart = this,
delay = Math.max(
H.animObject(chart.renderer.globalAnimation).duration,
250
);
chart.labelSeries = [];
chart.labelSeriesMaxSum = 0;
H.clearTimeout(chart.seriesLabelTimer);
// Which series should have labels
chart.series.forEach(function (series) {
var options = series.options.label,
label = series.labelBySeries,
closest = label && label.closest;
if (
options.enabled &&
series.visible &&
(series.graph || series.area) &&
!series.isSeriesBoosting
) {
chart.labelSeries.push(series);
if (options.minFontSize && options.maxFontSize) {
series.sum = series.yData.reduce(function (pv, cv) {
return (pv || 0) + (cv || 0);
}, 0);
chart.labelSeriesMaxSum = Math.max(
chart.labelSeriesMaxSum,
series.sum
);
}
// The labels are processing heavy, wait until the animation is done
if (e.type === 'load') {
delay = Math.max(
delay,
H.animObject(series.options.animation).duration
);
}
// Keep the position updated to the axis while redrawing
if (closest) {
if (closest[0].plotX !== undefined) {
label.animate({
x: closest[0].plotX + closest[1],
y: closest[0].plotY + closest[2]
});
} else {
label.attr({ opacity: 0 });
}
}
}
});
chart.seriesLabelTimer = H.syncTimeout(function () {
if (chart.series && chart.labelSeries) { // #7931, chart destroyed
chart.drawSeriesLabels();
}
}, chart.renderer.forExport ? 0 : delay);
}
// Leave both events, we handle animation differently (#9815)
addEvent(Chart, 'load', drawLabels);
addEvent(Chart, 'redraw', drawLabels);
});
_registerModule(_modules, 'masters/modules/series-label.src.js', [], function () {
});
}));