highcharts
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JavaScript charting framework
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JavaScript
/* *
*
* (c) 2010-2021 Torstein Honsi
*
* License: www.highcharts.com/license
*
* !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
*
* */
;
import U from '../Utilities.js';
var addEvent = U.addEvent, getMagnitude = U.getMagnitude, normalizeTickInterval = U.normalizeTickInterval, pick = U.pick;
/* *
*
* Class
*
* */
/**
* @private
*/
var LogarithmicAxis;
(function (LogarithmicAxis) {
/* *
*
* Declarations
*
* */
/* *
*
* Constants
*
* */
var composedClasses = [];
/* *
*
* Functions
*
* */
/* eslint-disable valid-jsdoc */
/**
* Provides logarithmic support for axes.
* @private
*/
function compose(AxisClass) {
if (composedClasses.indexOf(AxisClass) === -1) {
composedClasses.push(AxisClass);
AxisClass.keepProps.push('logarithmic');
addEvent(AxisClass, 'init', onInit);
addEvent(AxisClass, 'afterInit', onAfterInit);
}
return AxisClass;
}
LogarithmicAxis.compose = compose;
/**
* @private
*/
function onInit(e) {
var axis = this;
var options = e.userOptions;
var logarithmic = axis.logarithmic;
if (options.type !== 'logarithmic') {
axis.logarithmic = void 0;
}
else {
if (!logarithmic) {
logarithmic = axis.logarithmic = new Additions(axis);
}
}
}
/**
* @private
*/
function onAfterInit() {
var axis = this;
var log = axis.logarithmic;
// extend logarithmic axis
if (log) {
axis.lin2val = function (num) {
return log.lin2log(num);
};
axis.val2lin = function (num) {
return log.log2lin(num);
};
}
}
/* *
*
* Class
*
* */
/**
* Provides logarithmic support for axes.
* @private
* @class
*/
var Additions = /** @class */ (function () {
/* *
*
* Constructors
*
* */
function Additions(axis) {
this.axis = axis;
}
/* *
*
* Functions
*
* */
/**
* Set the tick positions of a logarithmic axis.
*/
Additions.prototype.getLogTickPositions = function (interval, min, max, minor) {
var log = this;
var axis = log.axis;
var axisLength = axis.len;
var options = axis.options;
// Since we use this method for both major and minor ticks,
// use a local variable and return the result
var positions = [];
// Reset
if (!minor) {
log.minorAutoInterval = void 0;
}
// First case: All ticks fall on whole logarithms: 1, 10, 100 etc.
if (interval >= 0.5) {
interval = Math.round(interval);
positions = axis.getLinearTickPositions(interval, min, max);
// Second case: We need intermediary ticks. For example
// 1, 2, 4, 6, 8, 10, 20, 40 etc.
}
else if (interval >= 0.08) {
var roundedMin = Math.floor(min);
var intermediate = void 0, i = void 0, j = void 0, len = void 0, pos = void 0, lastPos = void 0, break2 = void 0;
if (interval > 0.3) {
intermediate = [1, 2, 4];
// 0.2 equals five minor ticks per 1, 10, 100 etc
}
else if (interval > 0.15) {
intermediate = [1, 2, 4, 6, 8];
}
else { // 0.1 equals ten minor ticks per 1, 10, 100 etc
intermediate = [1, 2, 3, 4, 5, 6, 7, 8, 9];
}
for (i = roundedMin; i < max + 1 && !break2; i++) {
len = intermediate.length;
for (j = 0; j < len && !break2; j++) {
pos = log.log2lin(log.lin2log(i) * intermediate[j]);
// #1670, lastPos is #3113
if (pos > min &&
(!minor || lastPos <= max) &&
typeof lastPos !== 'undefined') {
positions.push(lastPos);
}
if (lastPos > max) {
break2 = true;
}
lastPos = pos;
}
}
// Third case: We are so deep in between whole logarithmic values,
// that we might as well handle the tick positions like a linear
// axis. For example 1.01, 1.02, 1.03, 1.04.
}
else {
var realMin = log.lin2log(min), realMax = log.lin2log(max), tickIntervalOption = minor ?
axis.getMinorTickInterval() :
options.tickInterval, filteredTickIntervalOption = tickIntervalOption === 'auto' ?
null :
tickIntervalOption, tickPixelIntervalOption = options.tickPixelInterval / (minor ? 5 : 1), totalPixelLength = minor ?
axisLength / axis.tickPositions.length :
axisLength;
interval = pick(filteredTickIntervalOption, log.minorAutoInterval, (realMax - realMin) *
tickPixelIntervalOption / (totalPixelLength || 1));
interval = normalizeTickInterval(interval, void 0, getMagnitude(interval));
positions = axis.getLinearTickPositions(interval, realMin, realMax).map(log.log2lin);
if (!minor) {
log.minorAutoInterval = interval / 5;
}
}
// Set the axis-level tickInterval variable
if (!minor) {
axis.tickInterval = interval;
}
return positions;
};
Additions.prototype.lin2log = function (num) {
return Math.pow(10, num);
};
Additions.prototype.log2lin = function (num) {
return Math.log(num) / Math.LN10;
};
return Additions;
}());
LogarithmicAxis.Additions = Additions;
})(LogarithmicAxis || (LogarithmicAxis = {}));
/* *
*
* Default Export
*
* */
export default LogarithmicAxis;