option.vue
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<template>
<li
@mouseenter="hoverItem"
@click.stop="selectOptionClick"
class="el-select-dropdown__item"
v-show="visible"
:class="{
'selected': itemSelected,
'is-disabled': disabled || groupDisabled || limitReached,
'hover': hover
}">
<slot>
<span>{{ currentLabel }}</span>
</slot>
</li>
</template>
<script type="text/babel">
import Emitter from 'element-ui/src/mixins/emitter';
import { getValueByPath, escapeRegexpString } from 'element-ui/src/utils/util';
export default {
mixins: [Emitter],
name: 'ElOption',
componentName: 'ElOption',
inject: ['select'],
props: {
value: {
required: true
},
label: [String, Number],
created: Boolean,
disabled: {
type: Boolean,
default: false
}
},
data() {
return {
index: -1,
groupDisabled: false,
visible: true,
hitState: false,
hover: false
};
},
computed: {
isObject() {
return Object.prototype.toString.call(this.value).toLowerCase() === '[object object]';
},
currentLabel() {
return this.label || (this.isObject ? '' : this.value);
},
currentValue() {
return this.value || this.label || '';
},
itemSelected() {
if (!this.select.multiple) {
return this.isEqual(this.value, this.select.value);
} else {
return this.contains(this.select.value, this.value);
}
},
limitReached() {
if (this.select.multiple) {
return !this.itemSelected &&
(this.select.value || []).length >= this.select.multipleLimit &&
this.select.multipleLimit > 0;
} else {
return false;
}
}
},
watch: {
currentLabel() {
if (!this.created && !this.select.remote) this.dispatch('ElSelect', 'setSelected');
},
value(val, oldVal) {
const { remote, valueKey } = this.select;
if (!this.created && !remote) {
if (valueKey && typeof val === 'object' && typeof oldVal === 'object' && val[valueKey] === oldVal[valueKey]) {
return;
}
this.dispatch('ElSelect', 'setSelected');
}
}
},
methods: {
isEqual(a, b) {
if (!this.isObject) {
return a === b;
} else {
const valueKey = this.select.valueKey;
return getValueByPath(a, valueKey) === getValueByPath(b, valueKey);
}
},
contains(arr = [], target) {
if (!this.isObject) {
return arr.indexOf(target) > -1;
} else {
const valueKey = this.select.valueKey;
return arr.some(item => {
return getValueByPath(item, valueKey) === getValueByPath(target, valueKey);
});
}
},
handleGroupDisabled(val) {
this.groupDisabled = val;
},
hoverItem() {
if (!this.disabled && !this.groupDisabled) {
this.select.hoverIndex = this.select.options.indexOf(this);
}
},
selectOptionClick() {
if (this.disabled !== true && this.groupDisabled !== true) {
this.dispatch('ElSelect', 'handleOptionClick', [this, true]);
}
},
queryChange(query) {
this.visible = new RegExp(escapeRegexpString(query), 'i').test(this.currentLabel) || this.created;
if (!this.visible) {
this.select.filteredOptionsCount--;
}
}
},
created() {
this.select.options.push(this);
this.select.cachedOptions.push(this);
this.select.optionsCount++;
this.select.filteredOptionsCount++;
this.$on('queryChange', this.queryChange);
this.$on('handleGroupDisabled', this.handleGroupDisabled);
},
beforeDestroy() {
this.select.onOptionDestroy(this.select.options.indexOf(this));
}
};
</script>