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<nav :class="$style.root">
<template v-if="auto && $env.VUE_APP_DESIGNER">
<u-crumb-item text="面包屑"></u-crumb-item>
<u-crumb-item text="会根据路径"></u-crumb-item>
<u-crumb-item text="自动生成"></u-crumb-item>
</template>
<template v-else-if="auto">
<template v-for="item in items">
<u-crumb-item v-bind="item" :key="item.title" :text="item.title"></u-crumb-item>
</template>
</template>
<slot v-else></slot>
<s-empty v-if="showSEmpty"></s-empty>
</nav>
</template>
<script>
import isFunction from 'lodash/isFunction';
import isObject from 'lodash/isObject';
import MParent from '../m-parent.vue';
import { getRouteComponentOptions } from '../../utils/vue';
import SEmpty from '../s-empty.vue';
import i18nMixin from '../../mixins/i18n';
export default {
name: 'u-crumb',
childName: 'u-crumb-item',
mixins: [MParent, i18nMixin('u-crumb')],
components: { SEmpty },
props: {
auto: { type: Boolean, default: false },
separator: { type: String, default: 'arrow' },
icon: { type: Boolean, default: false },
},
data() {
return {
// @inherit: itemVMs: [],
items: [],
};
},
computed: {
showSEmpty() {
return this.$env.VUE_APP_DESIGNER && !this.$slots.default && !this.auto && (!this.items || this.items.length === 0);
},
},
watch: {
$route: {
handler(to, from) {
if (!to || to.fullPath === (from && from.fullPath))
return;
const matched = to.matched || [];
const items = [];
matched.forEach((route) => {
const componentOptions = getRouteComponentOptions(route);
const meta = Object.assign({}, route.meta, componentOptions && componentOptions.meta);
let crumb = meta.crumb;
// 面包屑国际化
if (meta.crumbI18n) {
const crumbI18nMsg = this.$tt(meta.crumbI18n);
if (crumbI18nMsg)
crumb = crumbI18nMsg;
}
if (crumb) {
if (isFunction(crumb))
crumb = crumb(route, to, from);
else if (isObject(crumb))
crumb = Object.assign({}, crumb);
else if (typeof crumb === 'string')
crumb = { title: crumb };
if (!crumb.to)
crumb.to = route.path || '/';
if (crumb.to === to.path)
crumb.readonly = true;
if (crumb.title)
items.push(crumb);
}
});
const last = items[items.length - 1];
last && (last.readonly = true);
this.items = items;
},
immediate: true,
},
},
};
</script>
<style module>
.root {}
</style>
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