Blame view

src/components/select/select.vue 30.7 KB
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  <template>
      <div :class="classes" v-clickoutside="handleClose">
          <div
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              :class="selectionCls"
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              ref="reference"
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              @click="toggleMenu">
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              <slot name="input">
                  <div class="ivu-tag" v-for="(item, index) in selectedMultiple">
                      <span class="ivu-tag-text">{{ item.label }}</span>
                      <Icon type="ios-close-empty" @click.native.stop="removeTag(index)"></Icon>
                  </div>
                  <span :class="[prefixCls + '-placeholder']" v-show="showPlaceholder && !filterable">{{ localePlaceholder }}</span>
                  <span :class="[prefixCls + '-selected-value']" v-show="!showPlaceholder && !multiple && !filterable">{{ selectedSingle }}</span>
                  <input
                      type="text"
                      v-if="filterable"
                      v-model="query"
                      :disabled="disabled"
                      :class="[prefixCls + '-input']"
                      :placeholder="showPlaceholder ? localePlaceholder : ''"
                      :style="inputStyle"
                      @blur="handleBlur"
                      @keydown="resetInputState"
                      @keydown.delete="handleInputDelete"
                      ref="input">
                  <Icon type="ios-close" :class="[prefixCls + '-arrow']" v-show="showCloseIcon" @click.native.stop="clearSingleSelect"></Icon>
                  <Icon type="arrow-down-b" :class="[prefixCls + '-arrow']" v-if="!remote"></Icon>
              </slot>
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          </div>
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          <transition :name="transitionName">
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              <Drop
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                  :class="dropdownCls"
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                  v-show="dropVisible"
                  :placement="placement"
                  ref="dropdown"
                  :data-transfer="transfer"
                  v-transfer-dom>
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                  <ul v-show="notFoundShow" :class="[prefixCls + '-not-found']"><li>{{ localeNotFoundText }}</li></ul>
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                  <ul v-show="(!notFound && !remote) || (remote && !loading && !notFound)" :class="[prefixCls + '-dropdown-list']"><slot></slot></ul>
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                  <ul v-show="loading" :class="[prefixCls + '-loading']">{{ localeLoadingText }}</ul>
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              </Drop>
          </transition>
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      </div>
  </template>
  <script>
      import Icon from '../icon';
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      import Drop from './dropdown.vue';
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      import clickoutside from '../../directives/clickoutside';
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      import TransferDom from '../../directives/transfer-dom';
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      import { oneOf, findComponentDownward } from '../../utils/assist';
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      import Emitter from '../../mixins/emitter';
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      import Locale from '../../mixins/locale';
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      const prefixCls = 'ivu-select';
  
      export default {
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          name: 'iSelect',
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          mixins: [ Emitter, Locale ],
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          components: { Icon, Drop },
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          directives: { clickoutside, TransferDom },
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          props: {
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              value: {
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                  type: [String, Number, Array],
                  default: ''
              },
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              // 使用时,也得设置 value 才行
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              label: {
                  type: [String, Number, Array],
                  default: ''
              },
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              multiple: {
                  type: Boolean,
                  default: false
              },
              disabled: {
                  type: Boolean,
                  default: false
              },
              clearable: {
                  type: Boolean,
                  default: false
              },
              placeholder: {
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                  type: String
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              },
              filterable: {
                  type: Boolean,
                  default: false
              },
              filterMethod: {
                  type: Function
              },
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              remote: {
                  type: Boolean,
                  default: false
              },
              remoteMethod: {
                  type: Function
              },
              loading: {
                  type: Boolean,
                  default: false
              },
              loadingText: {
                  type: String
              },
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              size: {
                  validator (value) {
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                      return oneOf(value, ['small', 'large', 'default']);
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                  }
              },
              labelInValue: {
                  type: Boolean,
                  default: false
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              },
              notFoundText: {
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                  type: String
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              },
              placement: {
                  validator (value) {
                      return oneOf(value, ['top', 'bottom']);
                  },
                  default: 'bottom'
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              },
              transfer: {
                  type: Boolean,
                  default: false
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              },
              // Use for AutoComplete
              autoComplete: {
                  type: Boolean,
                  default: false
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              }
          },
          data () {
              return {
                  prefixCls: prefixCls,
                  visible: false,
                  options: [],
                  optionInstances: [],
                  selectedSingle: '',    // label
                  selectedMultiple: [],
                  focusIndex: 0,
                  query: '',
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                  lastQuery: '',
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                  selectToChangeQuery: false,    // when select an option, set this first and set query, because query is watching, it will emit event
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                  inputLength: 20,
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                  notFound: false,
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                  slotChangeDuration: false,    // if slot change duration and in multiple, set true and after slot change, set false
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                  model: this.value,
                  currentLabel: this.label
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              };
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          },
          computed: {
              classes () {
                  return [
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                      `${prefixCls}`,
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                      {
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                          [`${prefixCls}-visible`]: this.visible,
                          [`${prefixCls}-disabled`]: this.disabled,
                          [`${prefixCls}-multiple`]: this.multiple,
                          [`${prefixCls}-single`]: !this.multiple,
                          [`${prefixCls}-show-clear`]: this.showCloseIcon,
                          [`${prefixCls}-${this.size}`]: !!this.size
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                      }
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                  ];
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              },
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              dropdownCls () {
                  return {
                      [prefixCls + '-dropdown-transfer']: this.transfer,
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                      [prefixCls + '-multiple']: this.multiple && this.transfer,
                      ['ivu-auto-complete']: this.autoComplete,
                  };
              },
              selectionCls () {
                  return {
                      [`${prefixCls}-selection`]: !this.autoComplete
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                  };
              },
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              showPlaceholder () {
                  let status = false;
  
                  if ((typeof this.model) === 'string') {
                      if (this.model === '') {
                          status = true;
                      }
                  } else if (Array.isArray(this.model)) {
                      if (!this.model.length) {
                          status = true;
                      }
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                  } else if( this.model === null){
                      status = true;
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                  }
  
                  return status;
              },
              showCloseIcon () {
                  return !this.multiple && this.clearable && !this.showPlaceholder;
              },
              inputStyle () {
                  let style = {};
  
                  if (this.multiple) {
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                      if (this.showPlaceholder) {
                          style.width = '100%';
                      } else {
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                          style.width = `${this.inputLength}px`;
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                      }
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                  }
  
                  return style;
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              },
              localePlaceholder () {
                  if (this.placeholder === undefined) {
                      return this.t('i.select.placeholder');
                  } else {
                      return this.placeholder;
                  }
              },
              localeNotFoundText () {
                  if (this.notFoundText === undefined) {
                      return this.t('i.select.noMatch');
                  } else {
                      return this.notFoundText;
                  }
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              },
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              localeLoadingText () {
                  if (this.loadingText === undefined) {
                      return this.t('i.select.loading');
                  } else {
                      return this.loadingText;
                  }
              },
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              transitionName () {
                  return this.placement === 'bottom' ? 'slide-up' : 'slide-down';
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              },
              dropVisible () {
                  let status = true;
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                  const options = this.$slots.default || [];
                  if (!this.loading && this.remote && this.query === '' && !options.length) status = false;
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                  if (this.autoComplete && !options.length) status = false;
  
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                  return this.visible && status;
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              },
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              notFoundShow () {
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                  const options = this.$slots.default || [];
                  return (this.notFound && !this.remote) || (this.remote && !this.loading && !options.length);
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              }
          },
          methods: {
              toggleMenu () {
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                  if (this.disabled || this.autoComplete) {
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                      return false;
                  }
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                  this.visible = !this.visible;
              },
              hideMenu () {
                  this.visible = false;
                  this.focusIndex = 0;
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                  this.broadcast('iOption', 'on-select-close');
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              },
              // find option component
              findChild (cb) {
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                  const find = function (child) {
                      const name = child.$options.componentName;
  
                      if (name) {
                          cb(child);
                      } else if (child.$children.length) {
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                          child.$children.forEach((innerChild) => {
                              find(innerChild, cb);
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                          });
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                      }
                  };
  
                  if (this.optionInstances.length) {
                      this.optionInstances.forEach((child) => {
                          find(child);
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                      });
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                  } else {
                      this.$children.forEach((child) => {
                          find(child);
                      });
                  }
              },
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              updateOptions (init, slot = false) {
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                  let options = [];
                  let index = 1;
  
                  this.findChild((child) => {
                      options.push({
                          value: child.value,
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                          label: (child.label === undefined) ? child.$el.textContent : child.label
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                      });
                      child.index = index++;
  
                      if (init) {
                          this.optionInstances.push(child);
                      }
                  });
  
                  this.options = options;
  
                  if (init) {
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                      if (!this.remote) {
                          this.updateSingleSelected(true, slot);
                          this.updateMultipleSelected(true, slot);
                      }
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                  }
              },
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              updateSingleSelected (init = false, slot = false) {
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                  const type = typeof this.model;
  
                  if (type === 'string' || type === 'number') {
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                      let findModel = false;
  
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                      for (let i = 0; i < this.options.length; i++) {
                          if (this.model === this.options[i].value) {
                              this.selectedSingle = this.options[i].label;
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                              findModel = true;
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                              break;
                          }
                      }
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                      if (slot && !findModel) {
                          this.model = '';
                          this.query = '';
                      }
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                  }
  
                  this.toggleSingleSelected(this.model, init);
              },
              clearSingleSelect () {
                  if (this.showCloseIcon) {
                      this.findChild((child) => {
                          child.selected = false;
                      });
                      this.model = '';
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                      if (this.filterable) {
                          this.query = '';
                      }
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                  }
              },
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              updateMultipleSelected (init = false, slot = false) {
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                  if (this.multiple && Array.isArray(this.model)) {
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                      let selected = this.remote ? this.selectedMultiple : [];
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                      for (let i = 0; i < this.model.length; i++) {
                          const model = this.model[i];
  
                          for (let j = 0; j < this.options.length; j++) {
                              const option = this.options[j];
  
                              if (model === option.value) {
                                  selected.push({
                                      value: option.value,
                                      label: option.label
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                                  });
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                              }
                          }
                      }
  
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                      const selectedArray = [];
                      const selectedObject = {};
                      selected.forEach(item => {
                          if (!selectedObject[item.value]) {
                              selectedArray.push(item);
                              selectedObject[item.value] = 1;
                          }
                      });
  
                      this.selectedMultiple = this.remote ? selectedArray : selected;
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                      if (slot) {
                          let selectedModel = [];
  
                          for (let i = 0; i < selected.length; i++) {
                              selectedModel.push(selected[i].value);
                          }
  
                          // if slot change and remove a selected option, emit user
                          if (this.model.length === selectedModel.length) {
                              this.slotChangeDuration = true;
                          }
  
                          this.model = selectedModel;
                      }
                  }
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                  this.toggleMultipleSelected(this.model, init);
              },
              removeTag (index) {
                  if (this.disabled) {
                      return false;
                  }
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                  if (this.remote) {
                      const tag = this.model[index];
                      this.selectedMultiple = this.selectedMultiple.filter(item => item.value !== tag);
                  }
  
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                  this.model.splice(index, 1);
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                  if (this.filterable && this.visible) {
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                      this.$refs.input.focus();
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                  }
  
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                  this.broadcast('Drop', 'on-update-popper');
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              },
              // to select option for single
              toggleSingleSelected (value, init = false) {
                  if (!this.multiple) {
                      let label = '';
  
                      this.findChild((child) => {
                          if (child.value === value) {
                              child.selected = true;
                              label = (child.label === undefined) ? child.$el.innerHTML : child.label;
                          } else {
                              child.selected = false;
                          }
                      });
  
                      this.hideMenu();
  
                      if (!init) {
                          if (this.labelInValue) {
                              this.$emit('on-change', {
                                  value: value,
                                  label: label
                              });
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                              this.dispatch('FormItem', 'on-form-change', {
                                  value: value,
                                  label: label
                              });
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                          } else {
                              this.$emit('on-change', value);
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                              this.dispatch('FormItem', 'on-form-change', value);
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                          }
                      }
                  }
              },
              // to select option for multiple
              toggleMultipleSelected (value, init = false) {
                  if (this.multiple) {
                      let hybridValue = [];
                      for (let i = 0; i < value.length; i++) {
                          hybridValue.push({
                              value: value[i]
                          });
                      }
  
                      this.findChild((child) => {
                          const index = value.indexOf(child.value);
  
                          if (index >= 0) {
                              child.selected = true;
                              hybridValue[index].label = (child.label === undefined) ? child.$el.innerHTML : child.label;
                          } else {
                              child.selected = false;
                          }
                      });
  
                      if (!init) {
                          if (this.labelInValue) {
                              this.$emit('on-change', hybridValue);
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                              this.dispatch('FormItem', 'on-form-change', hybridValue);
                          } else {
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                              this.$emit('on-change', value);
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                              this.dispatch('FormItem', 'on-form-change', value);
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                          }
                      }
                  }
              },
              handleClose () {
                  this.hideMenu();
              },
              handleKeydown (e) {
                  if (this.visible) {
                      const keyCode = e.keyCode;
                      // Esc slide-up
                      if (keyCode === 27) {
                          e.preventDefault();
                          this.hideMenu();
                      }
                      // next
                      if (keyCode === 40) {
                          e.preventDefault();
                          this.navigateOptions('next');
                      }
                      // prev
                      if (keyCode === 38) {
                          e.preventDefault();
                          this.navigateOptions('prev');
                      }
                      // enter
                      if (keyCode === 13) {
                          e.preventDefault();
  
                          this.findChild((child) => {
                              if (child.isFocus) {
                                  child.select();
                              }
                          });
                      }
                  }
              },
              navigateOptions (direction) {
                  if (direction === 'next') {
                      const next = this.focusIndex + 1;
                      this.focusIndex = (this.focusIndex === this.options.length) ? 1 : next;
                  } else if (direction === 'prev') {
                      const prev = this.focusIndex - 1;
                      this.focusIndex = (this.focusIndex <= 1) ? this.options.length : prev;
                  }
  
                  let child_status = {
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                      disabled: false,
                      hidden: false
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                  };
  
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                  let find_deep = false;    // can next find allowed
  
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                  this.findChild((child) => {
                      if (child.index === this.focusIndex) {
                          child_status.disabled = child.disabled;
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                          child_status.hidden = child.hidden;
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                          if (!child.disabled && !child.hidden) {
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                              child.isFocus = true;
                          }
                      } else {
                          child.isFocus = false;
                      }
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                      if (!child.hidden && !child.disabled) {
                          find_deep = true;
                      }
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                  });
  
                  this.resetScrollTop();
  
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                  if ((child_status.disabled || child_status.hidden) && find_deep) {
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                      this.navigateOptions(direction);
                  }
              },
              resetScrollTop () {
                  const index = this.focusIndex - 1;
                  let bottomOverflowDistance = this.optionInstances[index].$el.getBoundingClientRect().bottom - this.$refs.dropdown.$el.getBoundingClientRect().bottom;
                  let topOverflowDistance = this.optionInstances[index].$el.getBoundingClientRect().top - this.$refs.dropdown.$el.getBoundingClientRect().top;
  
                  if (bottomOverflowDistance > 0) {
                      this.$refs.dropdown.$el.scrollTop += bottomOverflowDistance;
                  }
                  if (topOverflowDistance < 0) {
                      this.$refs.dropdown.$el.scrollTop += topOverflowDistance;
                  }
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              },
              handleBlur () {
                  setTimeout(() => {
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                      if (this.autoComplete) return;
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                      const model = this.model;
  
                      if (this.multiple) {
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                          this.query = '';
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                      } else {
                          if (model !== '') {
                              this.findChild((child) => {
                                  if (child.value === model) {
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                                      this.query = child.label === undefined ? child.searchLabel : child.label;
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                                  }
                              });
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                              // 如果删除了搜索词,下拉列表也清空了,所以强制调用一次remoteMethod
                              if (this.remote && this.query !== this.lastQuery) {
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                                  this.$nextTick(() => {
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                                      this.query = this.lastQuery;
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                                  });
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                              }
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                          } else {
                              this.query = '';
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                          }
                      }
                  }, 300);
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              },
              resetInputState () {
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                  this.inputLength = this.$refs.input.value.length * 12 + 20;
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              },
              handleInputDelete () {
                  if (this.multiple && this.model.length && this.query === '') {
                      this.removeTag(this.model.length - 1);
                  }
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              },
              // use when slot changed
              slotChange () {
                  this.options = [];
                  this.optionInstances = [];
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              },
              setQuery (query) {
                  if (!this.filterable) return;
                  this.query = query;
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              },
              modelToQuery() {
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                  if (!this.multiple && this.filterable && this.model !== undefined) {
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                      this.findChild((child) => {
                          if (this.model === child.value) {
                              if (child.label) {
                                  this.query = child.label;
                              } else if (child.searchLabel) {
                                  this.query = child.searchLabel;
                              } else {
                                  this.query = child.value;
                              }
                          }
                      });
                  }
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              },
              broadcastQuery (val) {
                  if (findComponentDownward(this, 'OptionGroup')) {
                      this.broadcast('OptionGroup', 'on-query-change', val);
                      this.broadcast('iOption', 'on-query-change', val);
                  } else {
                      this.broadcast('iOption', 'on-query-change', val);
                  }
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              },
              // 处理 remote 初始值
              updateLabel () {
                  if (this.remote) {
                      if (!this.multiple && this.model !== '') {
                          this.selectToChangeQuery = true;
                          if (this.currentLabel === '') this.currentLabel = this.model;
                          this.lastQuery = this.currentLabel;
                          this.query = this.currentLabel;
                      } else if (this.multiple && this.model.length) {
                          if (this.currentLabel.length !== this.model.length) this.currentLabel = this.model;
                          this.selectedMultiple = this.model.map((item, index) => {
                              return {
                                  value: item,
                                  label: this.currentLabel[index]
                              };
                          });
                      }
                  }
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              }
          },
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          mounted () {
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              this.modelToQuery();
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              // 处理 remote 初始值
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              this.updateLabel();
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              this.$nextTick(() => {
                  this.broadcastQuery('');
              });
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              this.updateOptions(true);
              document.addEventListener('keydown', this.handleKeydown);
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              this.$on('append', () => {
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                  if (!this.remote) {
                      this.modelToQuery();
                      this.$nextTick(() => {
                          this.broadcastQuery('');
                      });
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                  } else {
                      this.findChild(child => {
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                          child.selected = this.multiple ? this.model.indexOf(child.value) > -1 : this.model === child.value;
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                      });
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                  }
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                  this.slotChange();
                  this.updateOptions(true, true);
              });
              this.$on('remove', () => {
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                  if (!this.remote) {
                      this.modelToQuery();
                      this.$nextTick(() => {
                          this.broadcastQuery('');
                      });
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                  } else {
                      this.findChild(child => {
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                          child.selected = this.multiple ? this.model.indexOf(child.value) > -1 : this.model === child.value;
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                      });
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                  }
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                  this.slotChange();
                  this.updateOptions(true, true);
              });
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              this.$on('on-select-selected', (value) => {
                  if (this.model === value) {
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                      if (this.autoComplete) this.$emit('on-change', value);
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                      this.hideMenu();
                  } else {
                      if (this.multiple) {
                          const index = this.model.indexOf(value);
                          if (index >= 0) {
                              this.removeTag(index);
                          } else {
                              this.model.push(value);
                              this.broadcast('Drop', 'on-update-popper');
                          }
  
                          if (this.filterable) {
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                              // remote&filterable&multiple时,一次点多项,不应该设置true,因为无法置为false,下次的搜索会失效
                              if (this.query !== '') this.selectToChangeQuery = true;
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                              this.query = '';
                              this.$refs.input.focus();
                          }
                      } else {
                          this.model = value;
  
                          if (this.filterable) {
                              this.findChild((child) => {
                                  if (child.value === value) {
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                                      if (this.query !== '') this.selectToChangeQuery = true;
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                                      this.lastQuery = this.query = child.label === undefined ? child.searchLabel : child.label;
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                                  }
                              });
                          }
                      }
                  }
              });
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          },
          beforeDestroy () {
              document.removeEventListener('keydown', this.handleKeydown);
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          },
          watch: {
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              value (val) {
                  this.model = val;
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                  if (val === '') this.query = '';
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              },
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              label (val) {
                  this.currentLabel = val;
                  this.updateLabel();
              },
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              model () {
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                  this.$emit('input', this.model);
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                  this.modelToQuery();
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                  if (this.multiple) {
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                      if (this.slotChangeDuration) {
                          this.slotChangeDuration = false;
                      } else {
                          this.updateMultipleSelected();
                      }
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                  } else {
                      this.updateSingleSelected();
                  }
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                  // #957
                  if (!this.visible && this.filterable) {
                      this.$nextTick(() => {
                          this.broadcastQuery('');
                      });
                  }
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              },
              visible (val) {
                  if (val) {
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                      if (this.filterable) {
                          if (this.multiple) {
                              this.$refs.input.focus();
                          } else {
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                              if (!this.autoComplete) this.$refs.input.select();
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                          }
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                          if (this.remote) {
                              this.findChild(child => {
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                                  child.selected = this.multiple ? this.model.indexOf(child.value) > -1 : this.model === child.value;
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                              });
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                              // remote下,设置了默认值,第一次打开时,搜索一次
                              const options = this.$slots.default || [];
                              if (this.query !== '' && !options.length) {
                                  this.remoteMethod(this.query);
                              }
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                          }
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                      }
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                      this.broadcast('Drop', 'on-update-popper');
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                  } else {
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                      if (this.filterable) {
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                          if (!this.autoComplete) this.$refs.input.blur();
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                          // #566 reset options visible
                          setTimeout(() => {
                              this.broadcastQuery('');
                          }, 300);
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                      }
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                      this.broadcast('Drop', 'on-destroy-popper');
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                  }
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              },
              query (val) {
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                  if (this.remote && this.remoteMethod) {
                      if (!this.selectToChangeQuery) {
                          this.$emit('on-query-change', val);
                          this.remoteMethod(val);
                      }
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                      this.focusIndex = 0;
                      this.findChild(child => {
                          child.isFocus = false;
                      });
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                  } else {
                      if (!this.selectToChangeQuery) {
                          this.$emit('on-query-change', val);
                      }
                      this.broadcastQuery(val);
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                      let is_hidden = true;
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                      this.$nextTick(() => {
                          this.findChild((child) => {
                              if (!child.hidden) {
                                  is_hidden = false;
                              }
                          });
                          this.notFound = is_hidden;
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                      });
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                  }
                  this.selectToChangeQuery = false;
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811
                  this.broadcast('Drop', 'on-update-popper');
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              }
          }
b0893113   jingsam   :art: add eslint
814
      };
d6342fe1   jingsam   fixed ie bug
815
  </script>