<script lang="ts" setup>
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import type { Arrayable } from '@vueuse/core';
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import type { FlattenedItem } from 'radix-vue';
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import type { ClassType, Recordable } from '@vben-core/typings';
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import type { TreeProps } from './types';
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import { onMounted, ref, watchEffect } from 'vue';
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import { ChevronRight, IconifyIcon } from '@vben-core/icons';
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import { cn, get } from '@vben-core/shared/utils';
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import { TreeItem, TreeRoot } from 'radix-vue';
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import { Checkbox } from '../checkbox';
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const props = withDefaults(defineProps<TreeProps>(), {
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allowClear: false,
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autoCheckParent: true,
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bordered: false,
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checkStrictly: false,
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defaultExpandedKeys: () => [],
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defaultExpandedLevel: 0,
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disabled: false,
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disabledField: 'disabled',
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expanded: () => [],
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iconField: 'icon',
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labelField: 'label',
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multiple: false,
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showIcon: true,
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transition: true,
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valueField: 'value',
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childrenField: 'children',
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});
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const emits = defineEmits<{
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expand: [value: FlattenedItem<Recordable<any>>];
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select: [value: FlattenedItem<Recordable<any>>];
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}>();
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interface InnerFlattenItem<T = Recordable<any>, P = number | string> {
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hasChildren: boolean;
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level: number;
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parents: P[];
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value: T;
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}
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function flatten<T = Recordable<any>, P = number | string>(
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items: T[],
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childrenField: string = 'children',
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level = 0,
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parents: P[] = [],
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): InnerFlattenItem<T, P>[] {
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const result: InnerFlattenItem<T, P>[] = [];
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items.forEach((item) => {
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const children = get(item, childrenField) as Array<T>;
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const val = {
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hasChildren: Array.isArray(children) && children.length > 0,
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level,
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parents: [...parents],
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value: item,
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};
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result.push(val);
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if (val.hasChildren)
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result.push(
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...flatten(children, childrenField, level + 1, [
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...parents,
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get(item, props.valueField),
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]),
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);
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});
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return result;
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}
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const flattenData = ref<Array<InnerFlattenItem>>([]);
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const modelValue = defineModel<Arrayable<number | string>>();
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const expanded = ref<Array<number | string>>(props.defaultExpandedKeys ?? []);
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const treeValue = ref();
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onMounted(() => {
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watchEffect(() => {
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flattenData.value = flatten(props.treeData, props.childrenField);
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updateTreeValue();
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if (
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props.defaultExpandedLevel !== undefined &&
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props.defaultExpandedLevel > 0
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)
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expandToLevel(props.defaultExpandedLevel);
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});
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});
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function getItemByValue(value: number | string) {
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return flattenData.value.find(
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(item) => get(item.value, props.valueField) === value,
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)?.value;
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}
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function updateTreeValue() {
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const val = modelValue.value;
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if (val === undefined) {
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treeValue.value = undefined;
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} else {
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if (Array.isArray(val)) {
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const filteredValues = val.filter((v) => {
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const item = getItemByValue(v);
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return item && !get(item, props.disabledField);
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});
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treeValue.value = filteredValues.map((v) => getItemByValue(v));
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if (filteredValues.length !== val.length) {
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modelValue.value = filteredValues;
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}
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} else {
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const item = getItemByValue(val);
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if (item && !get(item, props.disabledField)) {
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treeValue.value = item;
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} else {
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treeValue.value = undefined;
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modelValue.value = undefined;
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}
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}
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}
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}
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function updateModelValue(val: Arrayable<Recordable<any>>) {
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if (Array.isArray(val)) {
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const filteredVal = val.filter((v) => !get(v, props.disabledField));
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modelValue.value = filteredVal.map((v) => get(v, props.valueField));
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} else {
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if (val && !get(val, props.disabledField)) {
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modelValue.value = get(val, props.valueField);
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}
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}
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}
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function expandToLevel(level: number) {
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const keys: string[] = [];
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flattenData.value.forEach((item) => {
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if (item.level <= level - 1) {
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keys.push(get(item.value, props.valueField));
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}
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});
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expanded.value = keys;
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}
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function collapseNodes(value: Arrayable<number | string>) {
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const keys = new Set(Array.isArray(value) ? value : [value]);
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expanded.value = expanded.value.filter((key) => !keys.has(key));
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}
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function expandNodes(value: Arrayable<number | string>) {
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const keys = [...(Array.isArray(value) ? value : [value])];
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keys.forEach((key) => {
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if (expanded.value.includes(key)) return;
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const item = getItemByValue(key);
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if (item) {
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expanded.value.push(key);
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}
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});
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}
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function expandAll() {
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expanded.value = flattenData.value
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.filter((item) => item.hasChildren)
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.map((item) => get(item.value, props.valueField));
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}
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function collapseAll() {
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expanded.value = [];
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}
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function isNodeDisabled(item: FlattenedItem<Recordable<any>>) {
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return props.disabled || get(item.value, props.disabledField);
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}
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function onToggle(item: FlattenedItem<Recordable<any>>) {
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emits('expand', item);
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}
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function onSelect(item: FlattenedItem<Recordable<any>>, isSelected: boolean) {
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if (isNodeDisabled(item)) {
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return;
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}
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if (
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!props.checkStrictly &&
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props.multiple &&
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props.autoCheckParent &&
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isSelected
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) {
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flattenData.value
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.find((i) => {
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return (
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get(i.value, props.valueField) === get(item.value, props.valueField)
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);
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})
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?.parents?.forEach((p) => {
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if (Array.isArray(modelValue.value) && !modelValue.value.includes(p)) {
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modelValue.value.push(p);
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}
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});
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}
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updateTreeValue();
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emits('select', item);
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}
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defineExpose({
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collapseAll,
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collapseNodes,
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expandAll,
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expandNodes,
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expandToLevel,
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getItemByValue,
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});
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</script>
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<template>
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<TreeRoot
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:get-key="(item) => get(item, valueField)"
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:get-children="(item) => get(item, childrenField)"
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:items="treeData"
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:model-value="treeValue"
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v-model:expanded="expanded as string[]"
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:default-expanded="defaultExpandedKeys as string[]"
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:propagate-select="!checkStrictly"
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:multiple="multiple"
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:disabled="disabled"
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:selection-behavior="allowClear || multiple ? 'toggle' : 'replace'"
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@update:model-value="updateModelValue"
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v-slot="{ flattenItems }"
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:class="
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cn(
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'text-blackA11 container select-none list-none rounded-lg p-2 text-sm font-medium',
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$attrs.class as unknown as ClassType,
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bordered ? 'border' : '',
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)
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"
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>
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<div class="w-full" v-if="$slots.header">
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<slot name="header"> </slot>
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</div>
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<TransitionGroup :name="transition ? 'fade' : ''">
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<TreeItem
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v-for="item in flattenItems"
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v-slot="{
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isExpanded,
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isSelected,
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isIndeterminate,
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handleSelect,
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handleToggle,
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}"
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:key="item._id"
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:style="{ 'padding-left': `${item.level - 0.5}rem` }"
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:class="
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cn('cursor-pointer', getNodeClass?.(item), {
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'data-[selected]:bg-accent': !multiple,
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'cursor-not-allowed': isNodeDisabled(item),
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})
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"
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v-bind="
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Object.assign(item.bind, {
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onfocus: isNodeDisabled(item) ? 'this.blur()' : undefined,
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disabled: isNodeDisabled(item),
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})
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"
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@select="
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(event: any) => {
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if (isNodeDisabled(item)) {
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event.preventDefault();
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event.stopPropagation();
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return;
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}
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if (event.detail.originalEvent.type === 'click') {
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event.preventDefault();
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}
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onSelect(item, event.detail.isSelected);
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}
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"
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@toggle="
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(event: any) => {
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if (event.detail.originalEvent.type === 'click') {
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event.preventDefault();
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}
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!isNodeDisabled(item) && onToggle(item);
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}
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"
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class="tree-node focus:ring-grass8 my-0.5 flex items-center rounded px-2 py-1 outline-none focus:ring-2"
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>
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<ChevronRight
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v-if="item.hasChildren"
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class="size-4 cursor-pointer transition"
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:class="{ 'rotate-90': isExpanded }"
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@click.stop="
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() => {
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handleToggle();
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onToggle(item);
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}
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"
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/>
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<div v-else class="h-4 w-4">
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<!-- <IconifyIcon v-if="item.value.icon" :icon="item.value.icon" /> -->
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</div>
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<Checkbox
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v-if="multiple"
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:checked="isSelected && !isNodeDisabled(item)"
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:disabled="isNodeDisabled(item)"
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:indeterminate="isIndeterminate && !isNodeDisabled(item)"
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@click="
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(event: MouseEvent) => {
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if (isNodeDisabled(item)) {
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event.preventDefault();
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event.stopPropagation();
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return;
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}
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handleSelect();
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}
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"
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/>
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<div
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class="flex items-center gap-1 pl-2"
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@click="
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(event: MouseEvent) => {
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if (isNodeDisabled(item)) {
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event.preventDefault();
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event.stopPropagation();
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return;
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}
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event.stopPropagation();
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event.preventDefault();
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handleSelect();
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}
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"
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>
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<slot name="node" v-bind="item">
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<IconifyIcon
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class="size-4"
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v-if="showIcon && get(item.value, iconField)"
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:icon="get(item.value, iconField)"
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/>
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{{ get(item.value, labelField) }}
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</slot>
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</div>
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</TreeItem>
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</TransitionGroup>
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<div class="w-full" v-if="$slots.footer">
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<slot name="footer"> </slot>
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</div>
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</TreeRoot>
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</template>
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<style lang="scss" scoped>
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.container {
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position: relative;
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padding: 0;
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list-style-type: none;
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}
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.item {
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box-sizing: border-box;
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width: 100%;
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height: 30px;
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background-color: #f3f3f3;
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border: 1px solid #666;
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}
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/* 1. 声明过渡效果 */
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.fade-move,
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.fade-enter-active,
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.fade-leave-active {
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transition: all 0.5s cubic-bezier(0.55, 0, 0.1, 1);
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}
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/* 2. 声明进入和离开的状态 */
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.fade-enter-from,
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.fade-leave-to {
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opacity: 0;
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transform: scaleY(0.01) translate(30px, 0);
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}
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/* 3. 确保离开的项目被移除出了布局流
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以便正确地计算移动时的动画效果。 */
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.fade-leave-active {
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position: absolute;
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}
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</style>
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