tabs.vue
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<template>
<div :class="classes">
<div :class="[prefixCls + '-bar']">
<div :class="[prefixCls + '-nav-container']">
<div :class="[prefixCls + '-nav-wrap']">
<div :class="[prefixCls + '-nav-scroll']">
<div :class="[prefixCls + '-nav']" ref="nav">
<div :class="barClasses" :style="barStyle"></div>
<div :class="tabCls(item)" v-for="(item, index) in navList" @click="handleChange(index)">
<Icon v-if="item.icon !== ''" :type="item.icon"></Icon>
{{ item.label }}
<Icon v-if="showClose(item)" type="ios-close-empty" @click.native.stop="handleRemove(index)"></Icon>
</div>
</div>
<div :class="[prefixCls + '-nav-right']" v-if="showSlot"><slot name="extra"></slot></div>
</div>
</div>
</div>
</div>
<div :class="contentClasses" :style="contentStyle"><slot></slot></div>
</div>
</template>
<script>
import Icon from '../icon/icon.vue';
import { oneOf, getStyle } from '../../utils/assist';
import Emitter from '../../mixins/emitter';
const prefixCls = 'ivu-tabs';
export default {
name: 'Tabs',
mixins: [ Emitter ],
components: { Icon },
props: {
value: {
type: [String, Number]
},
type: {
validator (value) {
return oneOf(value, ['line', 'card']);
},
default: 'line'
},
size: {
validator (value) {
return oneOf(value, ['small', 'default']);
},
default: 'default'
},
animated: {
type: Boolean,
default: true
},
closable: {
type: Boolean,
default: false
}
},
data () {
return {
prefixCls: prefixCls,
navList: [],
barWidth: 0,
barOffset: 0,
activeKey: this.value,
showSlot: false
};
},
computed: {
classes () {
return [
`${prefixCls}`,
{
[`${prefixCls}-card`]: this.type === 'card',
[`${prefixCls}-mini`]: this.size === 'small' && this.type === 'line',
[`${prefixCls}-no-animation`]: !this.animated
}
];
},
contentClasses () {
return [
`${prefixCls}-content`,
{
[`${prefixCls}-content-animated`]: this.animated
}
];
},
barClasses () {
return [
`${prefixCls}-ink-bar`,
{
[`${prefixCls}-ink-bar-animated`]: this.animated
}
];
},
contentStyle () {
const x = this.navList.findIndex((nav) => nav.name === this.activeKey);
const p = x === 0 ? '0%' : `-${x}00%`;
let style = {};
if (x > -1) {
style = {
transform: `translateX(${p}) translateZ(0px)`
};
}
return style;
},
barStyle () {
let style = {
display: 'none',
width: `${this.barWidth}px`
};
if (this.type === 'line') style.display = 'block';
if (this.animated) {
style.transform = `translate3d(${this.barOffset}px, 0px, 0px)`;
} else {
style.left = `${this.barOffset}px`;
}
return style;
}
},
methods: {
getTabs () {
return this.$children.filter(item => item.$options.name === 'TabPane');
},
updateNav () {
this.navList = [];
this.getTabs().forEach((pane, index) => {
this.navList.push({
label: pane.label,
icon: pane.icon || '',
name: pane.currentName || index,
disabled: pane.disabled,
closable: pane.closable
});
if (!pane.currentName) pane.currentName = index;
if (index === 0) {
if (!this.activeKey) this.activeKey = pane.currentName || index;
}
});
this.updateStatus();
this.updateBar();
},
updateBar () {
this.$nextTick(() => {
const index = this.navList.findIndex((nav) => nav.name === this.activeKey);
const prevTabs = this.$refs.nav.querySelectorAll(`.${prefixCls}-tab`);
const tab = prevTabs[index];
this.barWidth = parseFloat(getStyle(tab, 'width'));
if (index > 0) {
let offset = 0;
const gutter = this.size === 'small' ? 0 : 16;
for (let i = 0; i < index; i++) {
offset += parseFloat(getStyle(prevTabs[i], 'width')) + gutter;
}
this.barOffset = offset;
} else {
this.barOffset = 0;
}
});
},
updateStatus () {
const tabs = this.getTabs();
tabs.forEach(tab => tab.show = (tab.currentName === this.activeKey) || this.animated);
},
tabCls (item) {
return [
`${prefixCls}-tab`,
{
[`${prefixCls}-tab-disabled`]: item.disabled,
[`${prefixCls}-tab-active`]: item.name === this.activeKey
}
];
},
handleChange (index) {
const nav = this.navList[index];
if (nav.disabled) return;
this.activeKey = nav.name;
this.$emit('input', nav.name);
this.$emit('on-click', nav.name);
},
handleRemove (index) {
const tabs = this.getTabs();
const tab = tabs[index];
tab.$destroy();
if (tab.currentName === this.activeKey) {
const newTabs = this.getTabs();
let activeKey = -1;
if (newTabs.length) {
const leftNoDisabledTabs = tabs.filter((item, itemIndex) => !item.disabled && itemIndex < index);
const rightNoDisabledTabs = tabs.filter((item, itemIndex) => !item.disabled && itemIndex > index);
if (rightNoDisabledTabs.length) {
activeKey = rightNoDisabledTabs[0].currentName;
} else if (leftNoDisabledTabs.length) {
activeKey = leftNoDisabledTabs[leftNoDisabledTabs.length - 1].currentName;
} else {
activeKey = newTabs[0].currentName;
}
}
this.activeKey = activeKey;
this.$emit('input', activeKey);
}
this.$emit('on-tab-remove', tab.currentName);
this.updateNav();
},
showClose (item) {
if (this.type === 'card') {
if (item.closable !== null) {
return item.closable;
} else {
return this.closable;
}
} else {
return false;
}
}
},
watch: {
value (val) {
this.activeKey = val;
},
activeKey () {
this.updateBar();
this.updateStatus();
this.broadcast('Table', 'on-visible-change', true);
}
},
mounted () {
this.showSlot = this.$slots.extra !== undefined;
}
};
</script>