@antv/f2
Version:
Charts for mobile visualization.
122 lines (121 loc) • 4.32 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = timePretty;
var _time = require("../util/time");
function getYear(date) {
return new Date(date).getFullYear();
}
function createYear(year) {
return new Date(year, 0, 1).getTime();
}
function getMonth(date) {
return new Date(date).getMonth();
}
function diffMonth(min, max) {
var minYear = getYear(min);
var maxYear = getYear(max);
var minMonth = getMonth(min);
var maxMonth = getMonth(max);
return (maxYear - minYear) * 12 + (maxMonth - minMonth) % 12;
}
function creatMonth(year, month) {
return new Date(year, month, 1).getTime();
}
function diffDay(min, max) {
return Math.ceil((max - min) / _time.DAY);
}
function diffHour(min, max) {
return Math.ceil((max - min) / _time.HOUR);
}
function diffMinus(min, max) {
return Math.ceil((max - min) / (60 * 1000));
}
/**
* 计算 time 的 ticks，对 month, year 进行 pretty 处理
* @param cfg 度量的配置项
* @returns 计算后的 ticks
*/
function timePretty(cfg) {
var min = cfg.min,
max = cfg.max,
minTickInterval = cfg.minTickInterval,
tickCount = cfg.tickCount;
var tickInterval = cfg.tickInterval;
var ticks = [];
// 指定 tickInterval 后 tickCount 不生效，需要重新计算
if (!tickInterval) {
tickInterval = (max - min) / tickCount;
// 如果设置了最小间距，则使用最小间距
if (minTickInterval && tickInterval < minTickInterval) {
tickInterval = minTickInterval;
}
}
tickInterval = Math.max(Math.floor((max - min) / (Math.pow(2, 12) - 1)), tickInterval);
var minYear = getYear(min);
// 如果间距大于 1 年，则将开始日期从整年开始
if (tickInterval > _time.YEAR) {
var maxYear = getYear(max);
var yearInterval = Math.ceil(tickInterval / _time.YEAR);
for (var i = minYear; i <= maxYear + yearInterval; i = i + yearInterval) {
ticks.push(createYear(i));
}
} else if (tickInterval > _time.MONTH) {
// 大于月时
var monthInterval = Math.ceil(tickInterval / _time.MONTH);
var mmMoth = getMonth(min);
var dMonths = diffMonth(min, max);
for (var i = 0; i <= dMonths + monthInterval; i = i + monthInterval) {
ticks.push(creatMonth(minYear, i + mmMoth));
}
} else if (tickInterval > _time.DAY) {
// 大于天
var date = new Date(min);
var year = date.getFullYear();
var month = date.getMonth();
var mday = date.getDate();
var day = Math.ceil(tickInterval / _time.DAY);
var ddays = diffDay(min, max);
for (var i = 0; i < ddays + day; i = i + day) {
ticks.push(new Date(year, month, mday + i).getTime());
}
} else if (tickInterval > _time.HOUR) {
// 大于小时
var date = new Date(min);
var year = date.getFullYear();
var month = date.getMonth();
var day = date.getDate();
var hour = date.getHours();
var hours = Math.ceil(tickInterval / _time.HOUR);
var dHours = diffHour(min, max);
for (var i = 0; i <= dHours + hours; i = i + hours) {
ticks.push(new Date(year, month, day, hour + i).getTime());
}
} else if (tickInterval > _time.MINUTE) {
// 大于分钟
var dMinus = diffMinus(min, max);
var minutes = Math.ceil(tickInterval / _time.MINUTE);
for (var i = 0; i <= dMinus + minutes; i = i + minutes) {
ticks.push(min + i * _time.MINUTE);
}
} else {
// 小于分钟
var interval = tickInterval;
if (interval < _time.SECOND) {
interval = _time.SECOND;
}
var minSecond = Math.floor(min / _time.SECOND) * _time.SECOND;
var dSeconds = Math.ceil((max - min) / _time.SECOND);
var seconds = Math.ceil(interval / _time.SECOND);
for (var i = 0; i < dSeconds + seconds; i = i + seconds) {
ticks.push(minSecond + i * _time.SECOND);
}
}
// 最好是能从算法能解决这个问题，但是如果指定了 tickInterval，计算 ticks，也只能这么算，所以
// 打印警告提示
if (ticks.length >= 512) {
console.warn("Notice: current ticks length(".concat(ticks.length, ") >= 512, may cause performance issues, even out of memory. Because of the configure \"tickInterval\"(in milliseconds, current is ").concat(tickInterval, ") is too small, increase the value to solve the problem!"));
}
return ticks;
}