<template>
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<table
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cellspacing="0"
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cellpadding="0"
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class="el-date-table"
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@click="handleClick"
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@mousemove="handleMouseMove"
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:class="{ 'is-week-mode': selectionMode === 'week' }">
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<tbody>
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<tr>
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<th v-if="showWeekNumber">{{ t('el.datepicker.week') }}</th>
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<th v-for="(week, key) in WEEKS" :key="key">{{ t('el.datepicker.weeks.' + week) }}</th>
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</tr>
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<tr
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class="el-date-table__row"
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v-for="(row, key) in rows"
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:class="{ current: isWeekActive(row[1]) }"
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:key="key">
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<td
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v-for="(cell, key) in row"
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:class="getCellClasses(cell)"
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:key="key">
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<div>
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<span>
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{{ cell.text }}
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</span>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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</template>
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<script>
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import { getFirstDayOfMonth, getDayCountOfMonth, getWeekNumber, getStartDateOfMonth, prevDate, nextDate, isDate, clearTime as _clearTime} from 'element-ui/src/utils/date-util';
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import Locale from 'element-ui/src/mixins/locale';
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import { arrayFindIndex, arrayFind, coerceTruthyValueToArray } from 'element-ui/src/utils/util';
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const WEEKS = ['sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'];
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const getDateTimestamp = function(time) {
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if (typeof time === 'number' || typeof time === 'string') {
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return _clearTime(new Date(time)).getTime();
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} else if (time instanceof Date) {
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return _clearTime(time).getTime();
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} else {
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return NaN;
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}
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};
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// remove the first element that satisfies `pred` from arr
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// return a new array if modification occurs
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// return the original array otherwise
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const removeFromArray = function(arr, pred) {
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const idx = typeof pred === 'function' ? arrayFindIndex(arr, pred) : arr.indexOf(pred);
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return idx >= 0 ? [...arr.slice(0, idx), ...arr.slice(idx + 1)] : arr;
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};
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export default {
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mixins: [Locale],
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props: {
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firstDayOfWeek: {
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default: 7,
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type: Number,
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validator: val => val >= 1 && val <= 7
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},
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value: {},
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defaultValue: {
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validator(val) {
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// either: null, valid Date object, Array of valid Date objects
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return val === null || isDate(val) || (Array.isArray(val) && val.every(isDate));
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}
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},
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date: {},
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selectionMode: {
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default: 'day'
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},
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showWeekNumber: {
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type: Boolean,
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default: false
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},
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disabledDate: {},
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cellClassName: {},
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minDate: {},
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maxDate: {},
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rangeState: {
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default() {
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return {
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endDate: null,
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selecting: false
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};
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}
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}
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},
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computed: {
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offsetDay() {
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const week = this.firstDayOfWeek;
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// 周日为界限，左右偏移的天数，3217654 例如周一就是 -1，目的是调整前两行日期的位置
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return week > 3 ? 7 - week : -week;
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},
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WEEKS() {
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const week = this.firstDayOfWeek;
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return WEEKS.concat(WEEKS).slice(week, week + 7);
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},
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year() {
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return this.date.getFullYear();
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},
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month() {
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return this.date.getMonth();
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},
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startDate() {
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return getStartDateOfMonth(this.year, this.month);
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},
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rows() {
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// TODO: refactory rows / getCellClasses
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const date = new Date(this.year, this.month, 1);
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let day = getFirstDayOfMonth(date); // day of first day
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const dateCountOfMonth = getDayCountOfMonth(date.getFullYear(), date.getMonth());
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const dateCountOfLastMonth = getDayCountOfMonth(date.getFullYear(), (date.getMonth() === 0 ? 11 : date.getMonth() - 1));
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day = (day === 0 ? 7 : day);
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const offset = this.offsetDay;
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const rows = this.tableRows;
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let count = 1;
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const startDate = this.startDate;
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const disabledDate = this.disabledDate;
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const cellClassName = this.cellClassName;
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const selectedDate = this.selectionMode === 'dates' ? coerceTruthyValueToArray(this.value) : [];
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const now = getDateTimestamp(new Date());
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for (let i = 0; i < 6; i++) {
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const row = rows[i];
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if (this.showWeekNumber) {
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if (!row[0]) {
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row[0] = { type: 'week', text: getWeekNumber(nextDate(startDate, i * 7 + 1)) };
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}
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}
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for (let j = 0; j < 7; j++) {
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let cell = row[this.showWeekNumber ? j + 1 : j];
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if (!cell) {
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cell = { row: i, column: j, type: 'normal', inRange: false, start: false, end: false };
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}
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cell.type = 'normal';
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const index = i * 7 + j;
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const time = nextDate(startDate, index - offset).getTime();
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cell.inRange = time >= getDateTimestamp(this.minDate) && time <= getDateTimestamp(this.maxDate);
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cell.start = this.minDate && time === getDateTimestamp(this.minDate);
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cell.end = this.maxDate && time === getDateTimestamp(this.maxDate);
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const isToday = time === now;
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if (isToday) {
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cell.type = 'today';
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}
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if (i >= 0 && i <= 1) {
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const numberOfDaysFromPreviousMonth = day + offset < 0 ? 7 + day + offset : day + offset;
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if (j + i * 7 >= numberOfDaysFromPreviousMonth) {
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cell.text = count++;
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} else {
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cell.text = dateCountOfLastMonth - (numberOfDaysFromPreviousMonth - j % 7) + 1 + i * 7;
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cell.type = 'prev-month';
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}
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} else {
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if (count <= dateCountOfMonth) {
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cell.text = count++;
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} else {
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cell.text = count++ - dateCountOfMonth;
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cell.type = 'next-month';
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}
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}
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let cellDate = new Date(time);
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cell.disabled = typeof disabledDate === 'function' && disabledDate(cellDate);
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cell.selected = arrayFind(selectedDate, date => date.getTime() === cellDate.getTime());
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cell.customClass = typeof cellClassName === 'function' && cellClassName(cellDate);
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this.$set(row, this.showWeekNumber ? j + 1 : j, cell);
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}
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if (this.selectionMode === 'week') {
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const start = this.showWeekNumber ? 1 : 0;
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const end = this.showWeekNumber ? 7 : 6;
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const isWeekActive = this.isWeekActive(row[start + 1]);
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row[start].inRange = isWeekActive;
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row[start].start = isWeekActive;
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row[end].inRange = isWeekActive;
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row[end].end = isWeekActive;
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}
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}
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return rows;
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}
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},
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watch: {
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'rangeState.endDate'(newVal) {
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this.markRange(this.minDate, newVal);
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},
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minDate(newVal, oldVal) {
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if (getDateTimestamp(newVal) !== getDateTimestamp(oldVal)) {
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this.markRange(this.minDate, this.maxDate);
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}
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},
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maxDate(newVal, oldVal) {
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if (getDateTimestamp(newVal) !== getDateTimestamp(oldVal)) {
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this.markRange(this.minDate, this.maxDate);
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}
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}
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},
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data() {
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return {
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tableRows: [ [], [], [], [], [], [] ],
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lastRow: null,
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lastColumn: null
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};
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},
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methods: {
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cellMatchesDate(cell, date) {
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const value = new Date(date);
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return this.year === value.getFullYear() &&
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this.month === value.getMonth() &&
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Number(cell.text) === value.getDate();
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},
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getCellClasses(cell) {
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const selectionMode = this.selectionMode;
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const defaultValue = this.defaultValue ? Array.isArray(this.defaultValue) ? this.defaultValue : [this.defaultValue] : [];
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let classes = [];
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if ((cell.type === 'normal' || cell.type === 'today') && !cell.disabled) {
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classes.push('available');
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if (cell.type === 'today') {
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classes.push('today');
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}
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} else {
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classes.push(cell.type);
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}
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if (cell.type === 'normal' && defaultValue.some(date => this.cellMatchesDate(cell, date))) {
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classes.push('default');
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}
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if (selectionMode === 'day' && (cell.type === 'normal' || cell.type === 'today') && this.cellMatchesDate(cell, this.value)) {
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classes.push('current');
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}
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if (cell.inRange && ((cell.type === 'normal' || cell.type === 'today') || this.selectionMode === 'week')) {
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classes.push('in-range');
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if (cell.start) {
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classes.push('start-date');
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}
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if (cell.end) {
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classes.push('end-date');
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}
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}
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if (cell.disabled) {
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classes.push('disabled');
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}
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if (cell.selected) {
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classes.push('selected');
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}
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if (cell.customClass) {
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classes.push(cell.customClass);
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}
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return classes.join(' ');
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},
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getDateOfCell(row, column) {
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const offsetFromStart = row * 7 + (column - (this.showWeekNumber ? 1 : 0)) - this.offsetDay;
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return nextDate(this.startDate, offsetFromStart);
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},
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isWeekActive(cell) {
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if (this.selectionMode !== 'week') return false;
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const newDate = new Date(this.year, this.month, 1);
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const year = newDate.getFullYear();
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const month = newDate.getMonth();
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if (cell.type === 'prev-month') {
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newDate.setMonth(month === 0 ? 11 : month - 1);
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newDate.setFullYear(month === 0 ? year - 1 : year);
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}
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if (cell.type === 'next-month') {
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newDate.setMonth(month === 11 ? 0 : month + 1);
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newDate.setFullYear(month === 11 ? year + 1 : year);
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}
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newDate.setDate(parseInt(cell.text, 10));
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if (isDate(this.value)) {
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const dayOffset = (this.value.getDay() - this.firstDayOfWeek + 7) % 7 - 1;
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const weekDate = prevDate(this.value, dayOffset);
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return weekDate.getTime() === newDate.getTime();
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}
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return false;
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},
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markRange(minDate, maxDate) {
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minDate = getDateTimestamp(minDate);
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maxDate = getDateTimestamp(maxDate) || minDate;
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[minDate, maxDate] = [Math.min(minDate, maxDate), Math.max(minDate, maxDate)];
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const startDate = this.startDate;
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const rows = this.rows;
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for (let i = 0, k = rows.length; i < k; i++) {
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const row = rows[i];
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for (let j = 0, l = row.length; j < l; j++) {
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if (this.showWeekNumber && j === 0) continue;
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const cell = row[j];
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const index = i * 7 + j + (this.showWeekNumber ? -1 : 0);
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const time = nextDate(startDate, index - this.offsetDay).getTime();
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cell.inRange = minDate && time >= minDate && time <= maxDate;
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cell.start = minDate && time === minDate;
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cell.end = maxDate && time === maxDate;
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}
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}
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},
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handleMouseMove(event) {
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if (!this.rangeState.selecting) return;
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let target = event.target;
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if (target.tagName === 'SPAN') {
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target = target.parentNode.parentNode;
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}
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if (target.tagName === 'DIV') {
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target = target.parentNode;
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}
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if (target.tagName !== 'TD') return;
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const row = target.parentNode.rowIndex - 1;
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const column = target.cellIndex;
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// can not select disabled date
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if (this.rows[row][column].disabled) return;
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// only update rangeState when mouse moves to a new cell
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// this avoids frequent Date object creation and improves performance
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if (row !== this.lastRow || column !== this.lastColumn) {
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this.lastRow = row;
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this.lastColumn = column;
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this.$emit('changerange', {
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minDate: this.minDate,
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maxDate: this.maxDate,
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rangeState: {
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selecting: true,
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endDate: this.getDateOfCell(row, column)
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}
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});
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}
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},
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handleClick(event) {
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let target = event.target;
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if (target.tagName === 'SPAN') {
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target = target.parentNode.parentNode;
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}
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if (target.tagName === 'DIV') {
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target = target.parentNode;
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}
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if (target.tagName !== 'TD') return;
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const row = target.parentNode.rowIndex - 1;
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const column = this.selectionMode === 'week' ? 1 : target.cellIndex;
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const cell = this.rows[row][column];
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if (cell.disabled || cell.type === 'week') return;
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const newDate = this.getDateOfCell(row, column);
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if (this.selectionMode === 'range') {
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if (!this.rangeState.selecting) {
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this.$emit('pick', {minDate: newDate, maxDate: null});
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this.rangeState.selecting = true;
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} else {
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if (newDate >= this.minDate) {
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this.$emit('pick', {minDate: this.minDate, maxDate: newDate});
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} else {
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this.$emit('pick', {minDate: newDate, maxDate: this.minDate});
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}
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this.rangeState.selecting = false;
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}
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} else if (this.selectionMode === 'day') {
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this.$emit('pick', newDate);
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} else if (this.selectionMode === 'week') {
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const weekNumber = getWeekNumber(newDate);
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const value = newDate.getFullYear() + 'w' + weekNumber;
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this.$emit('pick', {
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year: newDate.getFullYear(),
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week: weekNumber,
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value: value,
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date: newDate
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});
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} else if (this.selectionMode === 'dates') {
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const value = this.value || [];
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const newValue = cell.selected
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? removeFromArray(value, date => date.getTime() === newDate.getTime())
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: [...value, newDate];
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this.$emit('pick', newValue);
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}
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}
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}
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};
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</script>
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