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- var numberUtil = require("../util/number");
- var formatUtil = require("../util/format");
- var Scale = require("./Scale");
- var helper = require("./helper");
- var roundNumber = numberUtil.round;
- var IntervalScale = Scale.extend({
- type: 'interval',
- _interval: 0,
- _intervalPrecision: 2,
- setExtent: function (start, end) {
- var thisExtent = this._extent;
- if (!isNaN(start)) {
- thisExtent[0] = parseFloat(start);
- }
- if (!isNaN(end)) {
- thisExtent[1] = parseFloat(end);
- }
- },
- unionExtent: function (other) {
- var extent = this._extent;
- other[0] < extent[0] && (extent[0] = other[0]);
- other[1] > extent[1] && (extent[1] = other[1]);
- IntervalScale.prototype.setExtent.call(this, extent[0], extent[1]);
- },
-
- getInterval: function () {
- return this._interval;
- },
-
- setInterval: function (interval) {
- this._interval = interval;
-
- this._niceExtent = this._extent.slice();
- this._intervalPrecision = helper.getIntervalPrecision(interval);
- },
-
- getTicks: function (expandToNicedExtent) {
- var interval = this._interval;
- var extent = this._extent;
- var niceTickExtent = this._niceExtent;
- var intervalPrecision = this._intervalPrecision;
- var ticks = [];
- if (!interval) {
- return ticks;
- }
- var safeLimit = 10000;
- if (extent[0] < niceTickExtent[0]) {
- if (expandToNicedExtent) {
- ticks.push(roundNumber(niceTickExtent[0] - interval, intervalPrecision));
- } else {
- ticks.push(extent[0]);
- }
- }
- var tick = niceTickExtent[0];
- while (tick <= niceTickExtent[1]) {
- ticks.push(tick);
- tick = roundNumber(tick + interval, intervalPrecision);
- if (tick === ticks[ticks.length - 1]) {
-
-
- break;
- }
- if (ticks.length > safeLimit) {
- return [];
- }
- }
-
- var lastNiceTick = ticks.length ? ticks[ticks.length - 1] : niceTickExtent[1];
- if (extent[1] > lastNiceTick) {
- if (expandToNicedExtent) {
- ticks.push(roundNumber(lastNiceTick + interval, intervalPrecision));
- } else {
- ticks.push(extent[1]);
- }
- }
- return ticks;
- },
-
- getMinorTicks: function (splitNumber) {
- var ticks = this.getTicks(true);
- var minorTicks = [];
- var extent = this.getExtent();
- for (var i = 1; i < ticks.length; i++) {
- var nextTick = ticks[i];
- var prevTick = ticks[i - 1];
- var count = 0;
- var minorTicksGroup = [];
- var interval = nextTick - prevTick;
- var minorInterval = interval / splitNumber;
- while (count < splitNumber - 1) {
- var minorTick = numberUtil.round(prevTick + (count + 1) * minorInterval);
- if (minorTick > extent[0] && minorTick < extent[1]) {
- minorTicksGroup.push(minorTick);
- }
- count++;
- }
- minorTicks.push(minorTicksGroup);
- }
- return minorTicks;
- },
-
- getLabel: function (data, opt) {
- if (data == null) {
- return '';
- }
- var precision = opt && opt.precision;
- if (precision == null) {
- precision = numberUtil.getPrecisionSafe(data) || 0;
- } else if (precision === 'auto') {
-
- precision = this._intervalPrecision;
- }
-
- data = roundNumber(data, precision, true);
- return formatUtil.addCommas(data);
- },
-
- niceTicks: function (splitNumber, minInterval, maxInterval) {
- splitNumber = splitNumber || 5;
- var extent = this._extent;
- var span = extent[1] - extent[0];
- if (!isFinite(span)) {
- return;
- }
-
- if (span < 0) {
- span = -span;
- extent.reverse();
- }
- var result = helper.intervalScaleNiceTicks(extent, splitNumber, minInterval, maxInterval);
- this._intervalPrecision = result.intervalPrecision;
- this._interval = result.interval;
- this._niceExtent = result.niceTickExtent;
- },
-
- niceExtent: function (opt) {
- var extent = this._extent;
- if (extent[0] === extent[1]) {
- if (extent[0] !== 0) {
-
- var expandSize = extent[0];
-
-
-
-
- if (!opt.fixMax) {
- extent[1] += expandSize / 2;
- extent[0] -= expandSize / 2;
- } else {
- extent[0] -= expandSize / 2;
- }
- } else {
- extent[1] = 1;
- }
- }
- var span = extent[1] - extent[0];
- if (!isFinite(span)) {
- extent[0] = 0;
- extent[1] = 1;
- }
- this.niceTicks(opt.splitNumber, opt.minInterval, opt.maxInterval);
- var interval = this._interval;
- if (!opt.fixMin) {
- extent[0] = roundNumber(Math.floor(extent[0] / interval) * interval);
- }
- if (!opt.fixMax) {
- extent[1] = roundNumber(Math.ceil(extent[1] / interval) * interval);
- }
- }
- });
- IntervalScale.create = function () {
- return new IntervalScale();
- };
- var _default = IntervalScale;
- module.exports = _default;
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