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243 lines
7.9 KiB
243 lines
7.9 KiB
4 years ago
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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var zrUtil = require("zrender/lib/core/util");
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var numberUtil = require("../util/number");
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var formatUtil = require("../util/format");
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var scaleHelper = require("./helper");
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var IntervalScale = require("./Interval");
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/*
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* A third-party license is embeded for some of the code in this file:
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* The "scaleLevels" was originally copied from "d3.js" with some
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* modifications made for this project.
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* (See more details in the comment on the definition of "scaleLevels" below.)
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* The use of the source code of this file is also subject to the terms
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* and consitions of the license of "d3.js" (BSD-3Clause, see
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* </licenses/LICENSE-d3>).
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*/
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// [About UTC and local time zone]:
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// In most cases, `number.parseDate` will treat input data string as local time
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// (except time zone is specified in time string). And `format.formateTime` returns
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// local time by default. option.useUTC is false by default. This design have
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// concidered these common case:
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// (1) Time that is persistent in server is in UTC, but it is needed to be diplayed
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// in local time by default.
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// (2) By default, the input data string (e.g., '2011-01-02') should be displayed
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// as its original time, without any time difference.
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var intervalScaleProto = IntervalScale.prototype;
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var mathCeil = Math.ceil;
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var mathFloor = Math.floor;
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var ONE_SECOND = 1000;
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var ONE_MINUTE = ONE_SECOND * 60;
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var ONE_HOUR = ONE_MINUTE * 60;
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var ONE_DAY = ONE_HOUR * 24; // FIXME 公用？
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var bisect = function (a, x, lo, hi) {
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while (lo < hi) {
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var mid = lo + hi >>> 1;
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if (a[mid][1] < x) {
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lo = mid + 1;
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} else {
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hi = mid;
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}
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}
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return lo;
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};
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/**
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* @alias module:echarts/coord/scale/Time
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* @constructor
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*/
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var TimeScale = IntervalScale.extend({
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type: 'time',
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/**
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* @override
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*/
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getLabel: function (val) {
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var stepLvl = this._stepLvl;
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var date = new Date(val);
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return formatUtil.formatTime(stepLvl[0], date, this.getSetting('useUTC'));
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},
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/**
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* @override
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*/
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niceExtent: function (opt) {
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var extent = this._extent; // If extent start and end are same, expand them
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if (extent[0] === extent[1]) {
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// Expand extent
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extent[0] -= ONE_DAY;
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extent[1] += ONE_DAY;
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} // If there are no data and extent are [Infinity, -Infinity]
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if (extent[1] === -Infinity && extent[0] === Infinity) {
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var d = new Date();
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extent[1] = +new Date(d.getFullYear(), d.getMonth(), d.getDate());
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extent[0] = extent[1] - ONE_DAY;
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}
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this.niceTicks(opt.splitNumber, opt.minInterval, opt.maxInterval); // var extent = this._extent;
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var interval = this._interval;
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if (!opt.fixMin) {
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extent[0] = numberUtil.round(mathFloor(extent[0] / interval) * interval);
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}
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if (!opt.fixMax) {
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extent[1] = numberUtil.round(mathCeil(extent[1] / interval) * interval);
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}
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},
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/**
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* @override
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*/
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niceTicks: function (approxTickNum, minInterval, maxInterval) {
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approxTickNum = approxTickNum || 10;
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var extent = this._extent;
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var span = extent[1] - extent[0];
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var approxInterval = span / approxTickNum;
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if (minInterval != null && approxInterval < minInterval) {
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approxInterval = minInterval;
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}
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if (maxInterval != null && approxInterval > maxInterval) {
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approxInterval = maxInterval;
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}
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var scaleLevelsLen = scaleLevels.length;
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var idx = bisect(scaleLevels, approxInterval, 0, scaleLevelsLen);
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var level = scaleLevels[Math.min(idx, scaleLevelsLen - 1)];
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var interval = level[1]; // Same with interval scale if span is much larger than 1 year
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if (level[0] === 'year') {
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var yearSpan = span / interval; // From "Nice Numbers for Graph Labels" of Graphic Gems
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// var niceYearSpan = numberUtil.nice(yearSpan, false);
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var yearStep = numberUtil.nice(yearSpan / approxTickNum, true);
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interval *= yearStep;
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}
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var timezoneOffset = this.getSetting('useUTC') ? 0 : new Date(+extent[0] || +extent[1]).getTimezoneOffset() * 60 * 1000;
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var niceExtent = [Math.round(mathCeil((extent[0] - timezoneOffset) / interval) * interval + timezoneOffset), Math.round(mathFloor((extent[1] - timezoneOffset) / interval) * interval + timezoneOffset)];
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scaleHelper.fixExtent(niceExtent, extent);
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this._stepLvl = level; // Interval will be used in getTicks
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this._interval = interval;
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this._niceExtent = niceExtent;
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},
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parse: function (val) {
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// val might be float.
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return +numberUtil.parseDate(val);
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}
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});
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zrUtil.each(['contain', 'normalize'], function (methodName) {
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TimeScale.prototype[methodName] = function (val) {
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return intervalScaleProto[methodName].call(this, this.parse(val));
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};
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});
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/**
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* This implementation was originally copied from "d3.js"
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* <https://github.com/d3/d3/blob/b516d77fb8566b576088e73410437494717ada26/src/time/scale.js>
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* with some modifications made for this program.
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* See the license statement at the head of this file.
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*/
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var scaleLevels = [// Format interval
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['hh:mm:ss', ONE_SECOND], // 1s
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['hh:mm:ss', ONE_SECOND * 5], // 5s
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['hh:mm:ss', ONE_SECOND * 10], // 10s
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['hh:mm:ss', ONE_SECOND * 15], // 15s
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['hh:mm:ss', ONE_SECOND * 30], // 30s
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['hh:mm\nMM-dd', ONE_MINUTE], // 1m
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['hh:mm\nMM-dd', ONE_MINUTE * 5], // 5m
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['hh:mm\nMM-dd', ONE_MINUTE * 10], // 10m
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['hh:mm\nMM-dd', ONE_MINUTE * 15], // 15m
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['hh:mm\nMM-dd', ONE_MINUTE * 30], // 30m
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['hh:mm\nMM-dd', ONE_HOUR], // 1h
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['hh:mm\nMM-dd', ONE_HOUR * 2], // 2h
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['hh:mm\nMM-dd', ONE_HOUR * 6], // 6h
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['hh:mm\nMM-dd', ONE_HOUR * 12], // 12h
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['MM-dd\nyyyy', ONE_DAY], // 1d
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['MM-dd\nyyyy', ONE_DAY * 2], // 2d
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['MM-dd\nyyyy', ONE_DAY * 3], // 3d
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['MM-dd\nyyyy', ONE_DAY * 4], // 4d
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['MM-dd\nyyyy', ONE_DAY * 5], // 5d
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['MM-dd\nyyyy', ONE_DAY * 6], // 6d
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['week', ONE_DAY * 7], // 7d
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['MM-dd\nyyyy', ONE_DAY * 10], // 10d
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['week', ONE_DAY * 14], // 2w
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['week', ONE_DAY * 21], // 3w
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['month', ONE_DAY * 31], // 1M
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['week', ONE_DAY * 42], // 6w
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['month', ONE_DAY * 62], // 2M
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['week', ONE_DAY * 70], // 10w
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['quarter', ONE_DAY * 95], // 3M
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['month', ONE_DAY * 31 * 4], // 4M
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['month', ONE_DAY * 31 * 5], // 5M
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['half-year', ONE_DAY * 380 / 2], // 6M
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['month', ONE_DAY * 31 * 8], // 8M
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['month', ONE_DAY * 31 * 10], // 10M
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['year', ONE_DAY * 380] // 1Y
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];
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/**
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* @param {module:echarts/model/Model}
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* @return {module:echarts/scale/Time}
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*/
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TimeScale.create = function (model) {
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return new TimeScale({
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useUTC: model.ecModel.get('useUTC')
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});
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};
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var _default = TimeScale;
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module.exports = _default;
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