keksAccountGUI/node_modulesOLD/vuetify/lib/components/VDatePicker/VDatePickerDateTable.js

// Mixins
import DatePickerTable from './mixins/date-picker-table'; // Utils

import { pad, createNativeLocaleFormatter, monthChange } from './util';
import { createRange } from '../../util/helpers';
import mixins from '../../util/mixins';
export default mixins(DatePickerTable
/* @vue/component */
).extend({
  name: 'v-date-picker-date-table',
  props: {
    firstDayOfWeek: {
      type: [String, Number],
      default: 0
    },
    showWeek: Boolean,
    weekdayFormat: Function
  },
  computed: {
    formatter() {
      return this.format || createNativeLocaleFormatter(this.currentLocale, {
        day: 'numeric',
        timeZone: 'UTC'
      }, {
        start: 8,
        length: 2
      });
    },

    weekdayFormatter() {
      return this.weekdayFormat || createNativeLocaleFormatter(this.currentLocale, {
        weekday: 'narrow',
        timeZone: 'UTC'
      });
    },

    weekDays() {
      const first = parseInt(this.firstDayOfWeek, 10);
      return this.weekdayFormatter ? createRange(7).map(i => this.weekdayFormatter(`2017-01-${first + i + 15}`)) // 2017-01-15 is Sunday
      : createRange(7).map(i => ['S', 'M', 'T', 'W', 'T', 'F', 'S'][(i + first) % 7]);
    }

  },
  methods: {
    calculateTableDate(delta) {
      return monthChange(this.tableDate, Math.sign(delta || 1));
    },

    genTHead() {
      const days = this.weekDays.map(day => this.$createElement('th', day));
      this.showWeek && days.unshift(this.$createElement('th'));
      return this.$createElement('thead', this.genTR(days));
    },

    // Returns number of the days from the firstDayOfWeek to the first day of the current month
    weekDaysBeforeFirstDayOfTheMonth() {
      const firstDayOfTheMonth = new Date(`${this.displayedYear}-${pad(this.displayedMonth + 1)}-01T00:00:00+00:00`);
      const weekDay = firstDayOfTheMonth.getUTCDay();
      return (weekDay - parseInt(this.firstDayOfWeek) + 7) % 7;
    },

    getWeekNumber() {
      let dayOfYear = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334][this.displayedMonth];

      if (this.displayedMonth > 1 && (this.displayedYear % 4 === 0 && this.displayedYear % 100 !== 0 || this.displayedYear % 400 === 0)) {
        dayOfYear++;
      }

      const offset = (this.displayedYear + (this.displayedYear - 1 >> 2) - Math.floor((this.displayedYear - 1) / 100) + Math.floor((this.displayedYear - 1) / 400) - Number(this.firstDayOfWeek)) % 7; // https://en.wikipedia.org/wiki/Zeller%27s_congruence

      return Math.floor((dayOfYear + offset) / 7) + 1;
    },

    genWeekNumber(weekNumber) {
      return this.$createElement('td', [this.$createElement('small', {
        staticClass: 'v-date-picker-table--date__week'
      }, String(weekNumber).padStart(2, '0'))]);
    },

    genTBody() {
      const children = [];
      const daysInMonth = new Date(this.displayedYear, this.displayedMonth + 1, 0).getDate();
      let rows = [];
      let day = this.weekDaysBeforeFirstDayOfTheMonth();
      let weekNumber = this.getWeekNumber();
      this.showWeek && rows.push(this.genWeekNumber(weekNumber++));

      while (day--) rows.push(this.$createElement('td'));

      for (day = 1; day <= daysInMonth; day++) {
        const date = `${this.displayedYear}-${pad(this.displayedMonth + 1)}-${pad(day)}`;
        rows.push(this.$createElement('td', [this.genButton(date, true, 'date', this.formatter)]));

        if (rows.length % (this.showWeek ? 8 : 7) === 0) {
          children.push(this.genTR(rows));
          rows = [];
          day < daysInMonth && this.showWeek && rows.push(this.genWeekNumber(weekNumber++));
        }
      }

      if (rows.length) {
        children.push(this.genTR(rows));
      }

      return this.$createElement('tbody', children);
    },

    genTR(children) {
      return [this.$createElement('tr', children)];
    }

  },

  render() {
    return this.genTable('v-date-picker-table v-date-picker-table--date', [this.genTHead(), this.genTBody()], this.calculateTableDate);
  }

});
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