117 lines
3.6 KiB
JavaScript
117 lines
3.6 KiB
JavaScript
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/* *
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*
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* (c) 2016 Highsoft AS
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* Authors: Øystein Moseng, Lars A. V. Cabrera, Jon Arild Nygard
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*
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* License: www.highcharts.com/license
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*
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* !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
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*
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* */
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'use strict';
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import U from '../Core/Utilities.js';
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const { error, merge, pick } = U;
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/* *
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*
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* Constants
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*
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* */
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const max = Math.max, min = Math.min;
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/* *
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*
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* Functions
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*
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* */
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/**
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* Calculate margin to place around obstacles for the pathfinder in pixels.
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* Returns a minimum of 1 pixel margin.
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*
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* @deprecated
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* @private
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* @function
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*
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* @param {Array<object>} obstacles
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* Obstacles to calculate margin from.
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*
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* @return {number}
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* The calculated margin in pixels. At least 1.
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*/
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function calculateObstacleMargin(obstacles) {
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const distances = [], len = obstacles.length;
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let obstacleDistance;
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// Go over all obstacles and compare them to the others.
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for (let i = 0; i < len; ++i) {
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// Compare to all obstacles ahead. We will already have compared this
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// obstacle to the ones before.
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for (let j = i + 1; j < len; ++j) {
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obstacleDistance = distance(obstacles[i], obstacles[j]);
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// TODO: Magic number 80
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if (obstacleDistance < 80) { // Ignore large distances
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distances.push(obstacleDistance);
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}
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}
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}
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// Ensure we always have at least one value, even in very spacious charts
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distances.push(80);
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return max(Math.floor(distances.sort((a, b) => (a - b))[
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// Discard first 10% of the relevant distances, and then grab
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// the smallest one.
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Math.floor(distances.length / 10)] / 2 - 1 // Divide the distance by 2 and subtract 1.
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), 1 // 1 is the minimum margin
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);
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}
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/**
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* Compute smallest distance between two rectangles
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* @deprecated
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* @private
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*/
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function distance(a, b, bbMargin) {
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// Count the distance even if we are slightly off
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const margin = pick(bbMargin, 10), yOverlap = a.yMax + margin > b.yMin - margin &&
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a.yMin - margin < b.yMax + margin, xOverlap = a.xMax + margin > b.xMin - margin &&
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a.xMin - margin < b.xMax + margin, xDistance = yOverlap ? (a.xMin > b.xMax ? a.xMin - b.xMax : b.xMin - a.xMax) : Infinity, yDistance = xOverlap ? (a.yMin > b.yMax ? a.yMin - b.yMax : b.yMin - a.yMax) : Infinity;
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// If the rectangles collide, try recomputing with smaller margin.
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// If they collide anyway, discard the obstacle.
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if (xOverlap && yOverlap) {
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return (margin ?
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distance(a, b, Math.floor(margin / 2)) :
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Infinity);
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}
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return min(xDistance, yDistance);
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}
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/**
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* Warn if using legacy options. Copy the options over. Note that this will
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* still break if using the legacy options in chart.update, addSeries etc.
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* @deprecated
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* @private
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*/
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function warnLegacy(chart) {
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if (chart.options.pathfinder ||
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chart.series.reduce(function (acc, series) {
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if (series.options) {
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merge(true, (series.options.connectors = series.options.connectors ||
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{}), series.options.pathfinder);
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}
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return acc || series.options && series.options.pathfinder;
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}, false)) {
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merge(true, (chart.options.connectors = chart.options.connectors || {}), chart.options.pathfinder);
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error('WARNING: Pathfinder options have been renamed. ' +
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'Use "chart.connectors" or "series.connectors" instead.');
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}
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}
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/* *
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*
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* Default Export
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*
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* */
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/**
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* Contains detached legacy code not used anymore after tree shaking.
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* @deprecated
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*/
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const legacy = {
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calculateObstacleMargin,
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distance,
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warnLegacy
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};
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export default legacy;
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