primevue-mirror/components/panelmenu/PanelMenuSub.vue

<template>
    <ul class="p-submenu-list" role="tree">
        <template v-for="(item, i) of model" :key="label(item) + i.toString()">
            <li v-if="visible(item) && !item.separator" role="none" :class="getItemClass(item)" :style="item.style">
                <template v-if="!template">
                    <router-link v-if="item.to && !disabled(item)" v-slot="{ navigate, href, isActive: isRouterActive, isExactActive }" :to="item.to" custom>
                        <a :href="href" :class="linkClass(item, { isActive: isRouterActive, isExactActive })" @click="onItemClick($event, item, navigate)" role="treeitem" :aria-expanded="isActive(item)">
                            <span :class="['p-menuitem-icon', item.icon]"></span>
                            <span class="p-menuitem-text">{{ label(item) }}</span>
                        </a>
                    </router-link>
                    <a
                        v-else
                        :href="item.url"
                        :class="linkClass(item)"
                        :target="item.target"
                        @click="onItemClick($event, item)"
                        @keydown="onItemKeydown($event, item)"
                        role="treeitem"
                        :aria-expanded="isActive(item)"
                        :tabindex="disabled(item) ? null : '0'"
                    >
                        <span v-if="item.items" :class="getSubmenuIcon(item)"></span>
                        <span :class="['p-menuitem-icon', item.icon]"></span>
                        <span class="p-menuitem-text">{{ label(item) }}</span>
                    </a>
                </template>
                <component v-else :is="template" :item="item"></component>
                <transition name="p-toggleable-content">
                    <div v-show="isActive(item)" class="p-toggleable-content">
                        <PanelMenuSub v-if="visible(item) && item.items" :key="label(item) + '_sub_'" :model="item.items" :template="template" :expandedKeys="expandedKeys" @item-toggle="$emit('item-toggle', $event)" :exact="exact" />
                    </div>
                </transition>
            </li>
            <li v-if="visible(item) && item.separator" :key="'separator' + i.toString()" :class="['p-menu-separator', item.class]" :style="item.style"></li>
        </template>
    </ul>
</template>

<script>
export default {
    name: 'PanelMenuSub',
    emits: ['item-toggle'],
    props: {
        model: {
            type: null,
            default: null
        },
        template: {
            type: Function,
            default: null
        },
        expandedKeys: {
            type: null,
            default: null
        },
        exact: {
            type: Boolean,
            default: true
        }
    },
    data() {
        return {
            activeItem: null
        };
    },
    methods: {
        onItemClick(event, item, navigate) {
            if (this.isActive(item) && this.activeItem === null) {
                this.activeItem = item;
            }

            if (this.disabled(item)) {
                event.preventDefault();

                return;
            }

            if (item.command) {
                item.command({
                    originalEvent: event,
                    item: item
                });
            }

            if (this.activeItem && this.activeItem === item) this.activeItem = null;
            else this.activeItem = item;

            this.$emit('item-toggle', { item: item, expanded: this.activeItem != null });

            if (item.to && navigate) {
                navigate(event);
            }
        },
        onItemKeydown(event, item) {
            if (event.which === 13) {
                this.onItemClick(event, item);
            }
        },
        getItemClass(item) {
            return ['p-menuitem', item.className];
        },
        linkClass(item, routerProps) {
            return [
                'p-menuitem-link',
                {
                    'p-disabled': this.disabled(item),
                    'router-link-active': routerProps && routerProps.isActive,
                    'router-link-active-exact': this.exact && routerProps && routerProps.isExactActive
                }
            ];
        },
        isActive(item) {
            return this.expandedKeys ? this.expandedKeys[item.key] : item === this.activeItem;
        },
        getSubmenuIcon(item) {
            const active = this.isActive(item);

            return ['p-panelmenu-icon pi pi-fw', { 'pi-angle-right': !active, 'pi-angle-down': active }];
        },
        visible(item) {
            return typeof item.visible === 'function' ? item.visible() : item.visible !== false;
        },
        disabled(item) {
            return typeof item.disabled === 'function' ? item.disabled() : item.disabled;
        },
        label(item) {
            return typeof item.label === 'function' ? item.label() : item.label;
        }
    }
};
</script>