chenhaodong / mew-iview

  <template>

      <div
          :class="wrapperClasses"
          v-click-outside:mousedown.capture="handleClose"
          v-click-outside.capture="handleClose"
      >

          <div ref="reference" :class="[prefixCls + '-rel']">

              <slot>
                  <i-input

                      :key="forceInputRerender"

                      :element-id="elementId"

                      :class="[prefixCls + '-editor']"
                      :readonly="!editable || readonly"
                      :disabled="disabled"
                      :size="size"
                      :placeholder="placeholder"
                      :value="visualValue"

                      :name="name"

                      ref="input"
  

                      @on-input-change="handleInputChange"

                      @on-focus="handleFocus"

                      @on-blur="handleBlur"

                      @on-click="handleIconClick"

                      @click.native="handleFocus"
                      @keydown.native="handleKeydown"

                      @mouseenter.native="handleInputMouseenter"
                      @mouseleave.native="handleInputMouseleave"

  
                      :icon="iconType"
                  ></i-input>

              </slot>
          </div>

          <transition name="transition-drop">

              <Drop
                  @click.native="handleTransferClick"
                  v-show="opened"
                  :class="{ [prefixCls + '-transfer']: transfer }"
                  :placement="placement"
                  ref="drop"
                  :data-transfer="transfer"
                  v-transfer-dom>

                  <div>
                      <component
                          :is="panel"

                          ref="pickerPanel"

                          :visible="visible"
                          :showTime="type === 'datetime' || type === 'datetimerange'"
                          :confirm="isConfirm"
                          :selectionMode="selectionMode"
                          :steps="steps"
                          :format="format"
                          :value="internalValue"

                          :start-date="startDate"

                          :split-panels="splitPanels"

                          :show-week-numbers="showWeekNumbers"

                          :picker-type="type"

                          :multiple="multiple"

                          :focused-date="focusedDate"

                          :time-picker-options="timePickerOptions"
  

                          v-bind="ownPickerProps"
  
                          @on-pick="onPick"
                          @on-pick-clear="handleClear"
                          @on-pick-success="onPickSuccess"
                          @on-pick-click="disableClickOutSide = true"
                          @on-selection-mode-change="onSelectionModeChange"
                      ></component>
                  </div>

              </Drop>
          </transition>

      </div>

  </template>
  <script>

      import iInput from '../../components/input/input.vue';
      import Drop from '../../components/select/dropdown.vue';

      import {directive as clickOutside} from 'v-click-outside-x';

      import TransferDom from '../../directives/transfer-dom';

      import { oneOf } from '../../utils/assist';

      import { DEFAULT_FORMATS, RANGE_SEPARATOR, TYPE_VALUE_RESOLVER_MAP, getDayCountOfMonth } from './util';
      import {findComponentsDownward} from '../../utils/assist';

      import Emitter from '../../mixins/emitter';

  
      const prefixCls = 'ivu-date-picker';

      const pickerPrefixCls = 'ivu-picker';

      const isEmptyArray = val => val.reduce((isEmpty, str) => isEmpty && !str || (typeof str === 'string' && str.trim() === ''), true);

      const keyValueMapper = {
          40: 'up',
          39: 'right',
          38: 'down',
          37: 'left',
      };
  
      const mapPossibleValues = (key, horizontal, vertical) => {
          if (key === 'left') return horizontal * -1;
          if (key === 'right') return horizontal * 1;
          if (key === 'up') return vertical * 1;
          if (key === 'down') return vertical * -1;
      };
  
      const pulseElement = (el) => {
          const pulseClass = 'ivu-date-picker-btn-pulse';
          el.classList.add(pulseClass);
          setTimeout(() => el.classList.remove(pulseClass), 200);
      };
  
      const extractTime = date => {
          if (!date) return [0, 0, 0];
          return [
              date.getHours(), date.getMinutes(), date.getSeconds()
          ];
      };
  

      export default {

          mixins: [ Emitter ],

          components: { iInput, Drop },

          directives: { clickOutside, TransferDom },

          props: {
              format: {
                  type: String
              },
              readonly: {
                  type: Boolean,
                  default: false
              },
              disabled: {
                  type: Boolean,
                  default: false
              },
              editable: {
                  type: Boolean,
                  default: true
              },

              clearable: {
                  type: Boolean,
                  default: true
              },

              confirm: {
                  type: Boolean,
                  default: false
              },

              open: {
                  type: Boolean,
                  default: null
              },

              multiple: {
                  type: Boolean,
                  default: false
              },

              timePickerOptions: {
                  default: () => ({}),
                  type: Object,
              },

              splitPanels: {
                  type: Boolean,
                  default: false
              },

              showWeekNumbers: {
                  type: Boolean,
                  default: false
              },

              startDate: {
                  type: Date
              },

              size: {
                  validator (value) {

                      return oneOf(value, ['small', 'large', 'default']);

                  },
                  default () {

                      return !this.$IVIEW || this.$IVIEW.size === '' ? 'default' : this.$IVIEW.size;

                  }
              },
              placeholder: {
                  type: String,
                  default: ''
              },

              placement: {

                  validator (value) {

                      return oneOf(value, ['top', 'top-start', 'top-end', 'bottom', 'bottom-start', 'bottom-end', 'left', 'left-start', 'left-end', 'right', 'right-start', 'right-end']);

                  },

                  default: 'bottom-start'

              },

              transfer: {
                  type: Boolean,

                  default () {

                      return !this.$IVIEW || this.$IVIEW.transfer === '' ? false : this.$IVIEW.transfer;

                  }

              },
              name: {
                  type: String

              },
              elementId: {
                  type: String

              },
              steps: {
                  type: Array,
                  default: () => []
              },
              value: {

                  type: [Date, String, Array]

              },
              options: {
                  type: Object,
                  default: () => ({})

              }
          },

          data(){

              const isRange = this.type.includes('range');
              const emptyArray = isRange ? [null, null] : [null];

              const initialValue = isEmptyArray((isRange ? this.value : [this.value]) || []) ? emptyArray : this.parseDate(this.value);

              const focusedTime = initialValue.map(extractTime);

              return {
                  prefixCls: prefixCls,
                  showClose: false,

                  visible: false,

                  internalValue: initialValue,

                  disableClickOutSide: false,    // fixed when click a date,trigger clickoutside to close picker

                  disableCloseUnderTransfer: false,  // transfer 模式下，点击Drop也会触发关闭,

                  selectionMode: this.onSelectionModeChange(this.type),

                  forceInputRerender: 1,
                  isFocused: false,

                  focusedDate: initialValue[0] || this.startDate || new Date(),

                  focusedTime: {
                      column: 0, // which column inside the picker
                      picker: 0, // which picker
                      time: focusedTime, // the values array into [hh, mm, ss],
                      active: false
                  },
                  internalFocus: false,

              };

          },
          computed: {

              wrapperClasses(){
                  return [prefixCls, {
                      [prefixCls + '-focused']: this.isFocused
                  }];
              },

              publicVModelValue(){

                  if (this.multiple){

                      return this.internalValue.slice();

                  } else {
                      const isRange = this.type.includes('range');

                      let val = this.internalValue.map(date => date instanceof Date ? new Date(date) : (date || ''));
  
                      if (this.type.match(/^time/)) val = val.map(this.formatDate);

                      return (isRange || this.multiple) ? val : val[0];

                  }

              },

              publicStringValue(){
                  const {formatDate, publicVModelValue, type} = this;
                  if (type.match(/^time/)) return publicVModelValue;

                  if (this.multiple) return formatDate(publicVModelValue);

                  return Array.isArray(publicVModelValue) ? publicVModelValue.map(formatDate) : formatDate(publicVModelValue);
              },

              opened () {
                  return this.open === null ? this.visible : this.open;
              },

              iconType () {

                  let icon = 'ios-calendar-outline';

                  if (this.type === 'time' || this.type === 'timerange') icon = 'ios-time-outline';
                  if (this.showClose) icon = 'ios-close-circle';

                  return icon;

              },

              transition () {

                  const bottomPlaced = this.placement.match(/^bottom/);
                  return bottomPlaced ? 'slide-up' : 'slide-down';

              },

              visualValue() {

                  return this.formatDate(this.internalValue);

              },
              isConfirm(){

                  return this.confirm || this.type === 'datetime' || this.type === 'datetimerange' || this.multiple;

              }
          },
          methods: {

              onSelectionModeChange(type){

                  if (type.match(/^date/)) type = 'date';

                  this.selectionMode = oneOf(type, ['year', 'month', 'date', 'time']) && type;
                  return this.selectionMode;

              },

              // 开启 transfer 时，点击 Drop 即会关闭，这里不让其关闭
              handleTransferClick () {
                  if (this.transfer) this.disableCloseUnderTransfer = true;
              },

              handleClose (e) {

                  if (this.disableCloseUnderTransfer) {
                      this.disableCloseUnderTransfer = false;
                      return false;
                  }

                  if (e && e.type === 'mousedown' && this.visible) {
                      e.preventDefault();
                      e.stopPropagation();
                      return;
                  }
  
                  if (this.visible) {
                      const pickerPanel = this.$refs.pickerPanel && this.$refs.pickerPanel.$el;
                      if (e && pickerPanel && pickerPanel.contains(e.target)) return; // its a click inside own component, lets ignore it.
  
                      this.visible = false;
                      e && e.preventDefault();
                      e && e.stopPropagation();
                      return;
                  }
  
                  this.isFocused = false;

                  this.disableClickOutSide = false;

              },

              handleFocus (e) {

                  if (this.readonly) return;

                  this.isFocused = true;
                  if (e && e.type === 'focus') return; // just focus, don't open yet

                  this.visible = true;

              },

              handleBlur (e) {
                  if (this.internalFocus){
                      this.internalFocus = false;
                      return;
                  }
                  if (this.visible) {
                      e.preventDefault();
                      return;
                  }
  
                  this.isFocused = false;

                  this.onSelectionModeChange(this.type);

                  this.internalValue = this.internalValue.slice(); // trigger panel watchers to reset views

                  this.reset();

                  this.$refs.pickerPanel.onToggleVisibility(false);
  

              },

              handleKeydown(e){
                  const keyCode = e.keyCode;
  
                  // handle "tab" key
                  if (keyCode === 9){
                      if (this.visible){
                          e.stopPropagation();
                          e.preventDefault();
  
                          if (this.isConfirm){
                              const selector = `.${pickerPrefixCls}-confirm > *`;
                              const tabbable = this.$refs.drop.$el.querySelectorAll(selector);
                              this.internalFocus = true;
                              const element = [...tabbable][e.shiftKey ? 'pop' : 'shift']();
                              element.focus();
                          } else {
                              this.handleClose();
                          }
                      } else {
                          this.focused = false;
                      }
                  }
  
                  // open the panel
                  const arrows = [37, 38, 39, 40];
                  if (!this.visible && arrows.includes(keyCode)){
                      this.visible = true;
                      return;
                  }
  
                  // close on "esc" key
                  if (keyCode === 27){
                      if (this.visible) {
                          e.stopPropagation();
                          this.handleClose();
                      }
                  }
  
                  // select date, "Enter" key
                  if (keyCode === 13){
                      const timePickers = findComponentsDownward(this, 'TimeSpinner');
                      if (timePickers.length > 0){
                          const columnsPerPicker = timePickers[0].showSeconds ? 3 : 2;
                          const pickerIndex = Math.floor(this.focusedTime.column / columnsPerPicker);
                          const value = this.focusedTime.time[pickerIndex];
  
                          timePickers[pickerIndex].chooseValue(value);
                          return;
                      }
  
                      if (this.type.match(/range/)){
                          this.$refs.pickerPanel.handleRangePick(this.focusedDate, 'date');
                      } else {

                          const panels = findComponentsDownward(this, 'PanelTable');
                          const compareDate = (d) => {
                              const sliceIndex = ['year', 'month', 'date'].indexOf((this.type)) + 1;
                              return [d.getFullYear(), d.getMonth(), d.getDate()].slice(0, sliceIndex).join('-');
                          };
                          const dateIsValid = panels.find(({cells}) => {
                              return cells.find(({date, disabled}) => compareDate(date) === compareDate(this.focusedDate) && !disabled);
                          });
                          if (dateIsValid) this.onPick(this.focusedDate, false, 'date');

                      }
                  }
  
                  if (!arrows.includes(keyCode)) return; // ignore rest of keys
  
                  // navigate times and dates
                  if (this.focusedTime.active) e.preventDefault(); // to prevent cursor from moving
                  this.navigateDatePanel(keyValueMapper[keyCode], e.shiftKey);
              },

              reset(){
                  this.$refs.pickerPanel.reset && this.$refs.pickerPanel.reset();

              },

              navigateTimePanel(direction){
  
                  this.focusedTime.active = true;
                  const horizontal = direction.match(/left|right/);
                  const vertical = direction.match(/up|down/);
                  const timePickers = findComponentsDownward(this, 'TimeSpinner');
  
                  const maxNrOfColumns = (timePickers[0].showSeconds ? 3 : 2) * timePickers.length;
                  const column = (currentColumn => {
                      const incremented = currentColumn + (horizontal ? (direction === 'left' ? -1 : 1) : 0);
                      return (incremented + maxNrOfColumns) % maxNrOfColumns;
                  })(this.focusedTime.column);
  
                  const columnsPerPicker = maxNrOfColumns / timePickers.length;
                  const pickerIndex = Math.floor(column / columnsPerPicker);
                  const col = column % columnsPerPicker;
  
  
                  if (horizontal){
                      const time = this.internalValue.map(extractTime);
  
                      this.focusedTime = {
                          ...this.focusedTime,
                          column: column,
                          time: time
                      };
                      timePickers.forEach((instance, i) => {
                          if (i === pickerIndex) instance.updateFocusedTime(col, time[pickerIndex]);
                          else instance.updateFocusedTime(-1, instance.focusedTime);
                      });
                  }
  
                  if (vertical){
                      const increment = direction === 'up' ? 1 : -1;
                      const timeParts = ['hours', 'minutes', 'seconds'];
  
  
                      const pickerPossibleValues = timePickers[pickerIndex][`${timeParts[col]}List`];
                      const nextIndex = pickerPossibleValues.findIndex(({text}) => this.focusedTime.time[pickerIndex][col] === text) + increment;
                      const nextValue = pickerPossibleValues[nextIndex % pickerPossibleValues.length].text;
                      const times = this.focusedTime.time.map((time, i) => {
                          if (i !== pickerIndex) return time;
                          time[col] = nextValue;
                          return time;
                      });
                      this.focusedTime = {
                          ...this.focusedTime,
                          time: times
                      };
  
                      timePickers.forEach((instance, i) => {
                          if (i === pickerIndex) instance.updateFocusedTime(col, times[i]);
                          else instance.updateFocusedTime(-1, instance.focusedTime);
                      });
                  }
              },
              navigateDatePanel(direction, shift){
  
                  const timePickers = findComponentsDownward(this, 'TimeSpinner');
                  if (timePickers.length > 0) {
                      // we are in TimePicker mode
                      this.navigateTimePanel(direction, shift, timePickers);
                      return;
                  }
  
                  if (shift){
                      if (this.type === 'year'){
                          this.focusedDate = new Date(
                              this.focusedDate.getFullYear() + mapPossibleValues(direction, 0, 10),
                              this.focusedDate.getMonth(),
                              this.focusedDate.getDate()
                          );
                      } else {
                          this.focusedDate = new Date(
                              this.focusedDate.getFullYear() + mapPossibleValues(direction, 0, 1),
                              this.focusedDate.getMonth() + mapPossibleValues(direction, 1, 0),
                              this.focusedDate.getDate()
                          );
                      }
  
                      const position = direction.match(/left|down/) ? 'prev' : 'next';
                      const double = direction.match(/up|down/) ? '-double' : '';
  
                      // pulse button
                      const button = this.$refs.drop.$el.querySelector(`.ivu-date-picker-${position}-btn-arrow${double}`);
                      if (button) pulseElement(button);
                      return;
                  }
  
                  const initialDate = this.focusedDate || (this.internalValue && this.internalValue[0]) || new Date();
                  const focusedDate = new Date(initialDate);
  
                  if (this.type.match(/^date/)){
                      const lastOfMonth = getDayCountOfMonth(initialDate.getFullYear(), initialDate.getMonth());
                      const startDay = initialDate.getDate();
                      const nextDay = focusedDate.getDate() +  mapPossibleValues(direction, 1, 7);
  
                      if (nextDay < 1) {
                          if (direction.match(/left|right/)) {
                              focusedDate.setMonth(focusedDate.getMonth() + 1);
                              focusedDate.setDate(nextDay);
                          } else {
                              focusedDate.setDate(startDay + Math.floor((lastOfMonth - startDay) / 7) * 7);
                          }
                      } else if (nextDay > lastOfMonth){
                          if (direction.match(/left|right/)) {
                              focusedDate.setMonth(focusedDate.getMonth() - 1);
                              focusedDate.setDate(nextDay);
                          } else {
                              focusedDate.setDate(startDay % 7);
                          }
                      } else {
                          focusedDate.setDate(nextDay);
                      }
                  }
  
                  if (this.type.match(/^month/)) {
                      focusedDate.setMonth(focusedDate.getMonth() + mapPossibleValues(direction, 1, 3));
                  }
  
                  if (this.type.match(/^year/)) {
                      focusedDate.setFullYear(focusedDate.getFullYear() + mapPossibleValues(direction, 1, 3));
                  }
  
                  this.focusedDate = focusedDate;
              },

              handleInputChange (event) {

                  const isArrayValue = this.type.includes('range') || this.multiple;

                  const oldValue = this.visualValue;

                  const newValue = event.target.value;

                  const newDate = this.parseDate(newValue);
                  const disabledDateFn =
                      this.options &&
                      typeof this.options.disabledDate === 'function' &&
                      this.options.disabledDate;
                  const valueToTest = isArrayValue ? newDate : newDate[0];

                  const isDisabled = disabledDateFn && disabledDateFn(valueToTest);

                  const isValidDate = newDate.reduce((valid, date) => valid && date instanceof Date, true);

                  if (newValue !== oldValue && !isDisabled && isValidDate) {

                      this.emitChange(this.type);

                      this.internalValue = newDate;
                  } else {
                      this.forceInputRerender++;

                  }

              },
              handleInputMouseenter () {

                  if (this.readonly || this.disabled) return;

                  if (this.visualValue && this.clearable) {

                      this.showClose = true;
                  }
              },

              handleInputMouseleave () {

                  this.showClose = false;
              },
              handleIconClick () {

                  if (this.showClose) {
                      this.handleClear();

                  } else if (!this.disabled) {

                      this.handleFocus();
                  }

              },
              handleClear () {

                  this.visible = false;

                  this.internalValue = this.internalValue.map(() => null);

                  this.$emit('on-clear');

                  this.dispatch('FormItem', 'on-form-change', '');

                  this.emitChange(this.type);

                  this.reset();

                  setTimeout(
                      () => this.onSelectionModeChange(this.type),
                      500 // delay to improve dropdown close visual effect
                  );

              },

              emitChange (type) {

                  this.$nextTick(() => {

                      this.$emit('on-change', this.publicStringValue, type);

                      this.dispatch('FormItem', 'on-form-change', this.publicStringValue);

                  });

              },

              parseDate(val) {

                  const isRange = this.type.includes('range');

                  const type = this.type;

                  const parser = (

                      TYPE_VALUE_RESOLVER_MAP[type] ||

                      TYPE_VALUE_RESOLVER_MAP['default']

                  ).parser;

                  const format = this.format || DEFAULT_FORMATS[type];
                  const multipleParser = TYPE_VALUE_RESOLVER_MAP['multiple'].parser;

                  if (val && type === 'time' && !(val instanceof Date)) {

                      val = parser(val, format);
                  } else if (this.multiple && val) {
                      val = multipleParser(val, format);

                  } else if (isRange) {

                      if (!val){
                          val = [null, null];
                      } else {

                          if (typeof val === 'string') {
                              val = parser(val, format);

                          } else if (type === 'timerange') {

                              val = parser(val, format).map(v => v || '');

                          } else {

                              const [start, end] = val;
                              if (start instanceof Date && end instanceof Date){
                                  val = val.map(date => new Date(date));
                              } else if (typeof start === 'string' && typeof end === 'string'){
                                  val = parser(val.join(RANGE_SEPARATOR), format);
                              } else if (!start || !end){
                                  val = [null, null];
                              }

                          }

                      }

                  } else if (typeof val === 'string' && type.indexOf('time') !== 0){

                      val = parser(val, format) || null;

                  }

  
                  return (isRange || this.multiple) ? (val || []) : [val];

              },

              formatDate(value){

                  const format = DEFAULT_FORMATS[this.type];

  
                  if (this.multiple) {
                      const formatter = TYPE_VALUE_RESOLVER_MAP.multiple.formatter;
                      return formatter(value, this.format || format);
                  } else {
                      const {formatter} = (
                          TYPE_VALUE_RESOLVER_MAP[this.type] ||
                          TYPE_VALUE_RESOLVER_MAP['default']
                      );
                      return formatter(value, this.format || format);
                  }

              },

              onPick(dates, visible = false, type) {

                  dates = this.parseDate(dates);

                  if (this.multiple){

                      const pickedTimeStamp = dates.getTime();
                      const indexOfPickedDate = this.internalValue.findIndex(date => date && date.getTime() === pickedTimeStamp);

                      const allDates = [...this.internalValue, dates].filter(Boolean);

                      const timeStamps = allDates.map(date => date.getTime()).filter((ts, i, arr) => arr.indexOf(ts) === i && i !== indexOfPickedDate); // filter away duplicates

                      this.internalValue = timeStamps.map(ts => new Date(ts));

                  } else {
                      this.internalValue = Array.isArray(dates) ? dates : [dates];

                  }

                  if (this.internalValue[0]) this.focusedDate = this.internalValue[0];

                  this.focusedTime = {
                      ...this.focusedTime,
                      time: this.internalValue.map(extractTime)
                  };
  

                  if (!this.isConfirm) this.onSelectionModeChange(this.type); // reset the selectionMode
                  if (!this.isConfirm) this.visible = visible;

                  this.emitChange(type);

              },
              onPickSuccess(){
                  this.visible = false;
                  this.$emit('on-ok');

                  this.focus();

                  this.reset();

              },

              focus() {

                  this.$refs.input && this.$refs.input.focus();

              }

          },
          watch: {

              visible (state) {
                  if (state === false){

                      this.$refs.drop.destroy();

                  }

                  this.$refs.drop.update();

                  this.$emit('on-open-change', state);

              },

              value(val) {

                  this.internalValue = this.parseDate(val);

              },
              open (val) {

                  this.visible = val === true;
              },
              type(type){
                  this.onSelectionModeChange(type);

              },

              publicVModelValue(now, before){

                  const newValue = JSON.stringify(now);
                  const oldValue = JSON.stringify(before);

                  const shouldEmitInput = newValue !== oldValue || typeof now !== typeof before;
                  if (shouldEmitInput) this.$emit('input', now); // to update v-model

              },

          },

          mounted () {

              const initialValue = this.value;

              const parsedValue = this.publicVModelValue;

              if (typeof initialValue !== typeof parsedValue || JSON.stringify(initialValue) !== JSON.stringify(parsedValue)){

                  this.$emit('input', this.publicVModelValue); // to update v-model

              }

              if (this.open !== null) this.visible = this.open;

  
              // to handle focus from confirm buttons
              this.$on('focus-input', () => this.focus());

          }

      };
  </script>