ant-design-vue/components/vc-tree/Tree.tsx

1172 lines
35 KiB
Vue

import type { NodeMouseEventHandler, NodeDragEventHandler } from './contextTypes';
import { TreeContext } from './contextTypes';
import {
getDragChildrenKeys,
parseCheckedKeys,
conductExpandParent,
calcSelectedKeys,
calcDropPosition,
arrAdd,
arrDel,
posToArr,
} from './util';
import type { Key, FlattenNode, EventDataNode, ScrollTo, DragNodeEvent } from './interface';
import {
flattenTreeData,
convertTreeToData,
convertDataToEntities,
convertNodePropsToEventData,
getTreeNodeProps,
fillFieldNames,
} from './utils/treeUtil';
import NodeList, { MOTION_KEY, MotionEntity } from './NodeList';
import { conductCheck } from './utils/conductUtil';
import DropIndicator from './DropIndicator';
import {
computed,
defineComponent,
onUnmounted,
reactive,
ref,
shallowRef,
watch,
watchEffect,
nextTick,
} from 'vue';
import initDefaultProps from '../_util/props-util/initDefaultProps';
import type { CheckInfo, DraggableFn } from './props';
import { treeProps } from './props';
import { warning } from '../vc-util/warning';
import KeyCode from '../_util/KeyCode';
import classNames from '../_util/classNames';
import pickAttrs from '../_util/pickAttrs';
const MAX_RETRY_TIMES = 10;
export type DraggableConfig = {
icon?: any;
nodeDraggable?: DraggableFn;
};
export default defineComponent({
name: 'Tree',
inheritAttrs: false,
slots: ['checkable', 'title', 'icon', 'titleRender'],
props: initDefaultProps(treeProps(), {
prefixCls: 'vc-tree',
showLine: false,
showIcon: true,
selectable: true,
multiple: false,
checkable: false,
disabled: false,
checkStrictly: false,
draggable: false,
defaultExpandParent: true,
autoExpandParent: false,
defaultExpandAll: false,
defaultExpandedKeys: [],
defaultCheckedKeys: [],
defaultSelectedKeys: [],
dropIndicatorRender: DropIndicator,
allowDrop: () => true,
}),
setup(props, { attrs, slots, expose }) {
const destroyed = ref(false);
let delayedDragEnterLogic: Record<Key, number> = {};
const indent = ref();
const selectedKeys = shallowRef([]);
const checkedKeys = shallowRef([]);
const halfCheckedKeys = shallowRef([]);
const loadedKeys = shallowRef([]);
const loadingKeys = shallowRef([]);
const expandedKeys = shallowRef([]);
const loadingRetryTimes: Record<Key, number> = {};
const dragState = reactive({
draggingNodeKey: null,
dragChildrenKeys: [],
// dropTargetKey is the key of abstract-drop-node
// the abstract-drop-node is the real drop node when drag and drop
// not the DOM drag over node
dropTargetKey: null,
dropPosition: null, // the drop position of abstract-drop-node, inside 0, top -1, bottom 1
dropContainerKey: null, // the container key of abstract-drop-node if dropPosition is -1 or 1
dropLevelOffset: null, // the drop level offset of abstract-drag-over-node
dropTargetPos: null, // the pos of abstract-drop-node
dropAllowed: true, // if drop to abstract-drop-node is allowed
// the abstract-drag-over-node
// if mouse is on the bottom of top dom node or no the top of the bottom dom node
// abstract-drag-over-node is the top node
dragOverNodeKey: null,
});
const treeData = computed(() => {
return props.treeData !== undefined ? props.treeData : convertTreeToData(props.children);
});
const keyEntities = shallowRef({});
const focused = ref(false);
const activeKey = ref<Key>(null);
const listChanging = ref(false);
const fieldNames = computed(() => fillFieldNames(props.fieldNames));
const listRef = ref();
let dragStartMousePosition = null;
let dragNode: DragNodeEvent = null;
let currentMouseOverDroppableNodeKey = null;
const treeNodeRequiredProps = computed(() => {
return {
expandedKeys: expandedKeys.value || [],
selectedKeys: selectedKeys.value || [],
loadedKeys: loadedKeys.value || [],
loadingKeys: loadingKeys.value || [],
checkedKeys: checkedKeys.value || [],
halfCheckedKeys: halfCheckedKeys.value || [],
dragOverNodeKey: dragState.dragOverNodeKey,
dropPosition: dragState.dropPosition,
keyEntities: keyEntities.value,
};
});
watchEffect(() => {
if (treeData.value) {
const entitiesMap = convertDataToEntities(treeData.value, { fieldNames: fieldNames.value });
keyEntities.value = {
[MOTION_KEY]: MotionEntity,
...entitiesMap.keyEntities,
};
}
});
let init = false; // 处理 defaultXxxx api, 仅仅首次有效
watch(
[() => props.expandedKeys, () => props.autoExpandParent, keyEntities],
// eslint-disable-next-line @typescript-eslint/no-unused-vars
([_newKeys, newAutoExpandParent], [_oldKeys, oldAutoExpandParent]) => {
let keys = expandedKeys.value;
// ================ expandedKeys =================
if (
props.expandedKeys !== undefined ||
(init && newAutoExpandParent !== oldAutoExpandParent)
) {
keys =
props.autoExpandParent || (!init && props.defaultExpandParent)
? conductExpandParent(props.expandedKeys, keyEntities.value)
: props.expandedKeys;
} else if (!init && props.defaultExpandAll) {
const cloneKeyEntities = { ...keyEntities.value };
delete cloneKeyEntities[MOTION_KEY];
keys = Object.keys(cloneKeyEntities).map(key => cloneKeyEntities[key].key);
} else if (!init && props.defaultExpandedKeys) {
keys =
props.autoExpandParent || props.defaultExpandParent
? conductExpandParent(props.defaultExpandedKeys, keyEntities.value)
: props.defaultExpandedKeys;
}
if (keys) {
expandedKeys.value = keys;
}
init = true;
},
{ immediate: true },
);
// ================ flattenNodes =================
const flattenNodes = computed(() => {
return flattenTreeData(treeData.value, expandedKeys.value, fieldNames.value);
});
// ================ selectedKeys =================
watchEffect(() => {
if (props.selectable) {
if (props.selectedKeys !== undefined) {
selectedKeys.value = calcSelectedKeys(props.selectedKeys, props);
} else if (!init && props.defaultSelectedKeys) {
selectedKeys.value = calcSelectedKeys(props.defaultSelectedKeys, props);
}
}
});
// ================= checkedKeys =================
watchEffect(() => {
if (props.checkable) {
let checkedKeyEntity;
if (props.checkedKeys !== undefined) {
checkedKeyEntity = parseCheckedKeys(props.checkedKeys) || {};
} else if (!init && props.defaultCheckedKeys) {
checkedKeyEntity = parseCheckedKeys(props.defaultCheckedKeys) || {};
} else if (treeData.value) {
// If `treeData` changed, we also need check it
checkedKeyEntity = parseCheckedKeys(props.checkedKeys) || {
checkedKeys: checkedKeys.value,
halfCheckedKeys: halfCheckedKeys.value,
};
}
if (checkedKeyEntity) {
let { checkedKeys: newCheckedKeys = [], halfCheckedKeys: newHalfCheckedKeys = [] } =
checkedKeyEntity;
if (!props.checkStrictly) {
const conductKeys = conductCheck(newCheckedKeys, true, keyEntities.value);
({ checkedKeys: newCheckedKeys, halfCheckedKeys: newHalfCheckedKeys } = conductKeys);
}
checkedKeys.value = newCheckedKeys;
halfCheckedKeys.value = newHalfCheckedKeys;
}
}
});
// ================= loadedKeys ==================
watchEffect(() => {
if (props.loadedKeys) {
loadedKeys.value = props.loadedKeys;
}
});
const resetDragState = () => {
Object.assign(dragState, {
dragOverNodeKey: null,
dropPosition: null,
dropLevelOffset: null,
dropTargetKey: null,
dropContainerKey: null,
dropTargetPos: null,
dropAllowed: false,
});
};
const scrollTo: ScrollTo = scroll => {
listRef.value.scrollTo(scroll);
};
watch(
() => props.activeKey,
() => {
if (props.activeKey !== undefined) {
activeKey.value = props.activeKey;
}
},
{ immediate: true },
);
watch(
activeKey,
val => {
nextTick(() => {
if (val !== null) {
scrollTo({ key: val });
}
});
},
{ immediate: true, flush: 'post' },
);
// =========================== Expanded ===========================
/** Set uncontrolled `expandedKeys`. This will also auto update `flattenNodes`. */
const setExpandedKeys = (keys: Key[]) => {
if (props.expandedKeys === undefined) {
expandedKeys.value = keys;
}
};
const cleanDragState = () => {
if (dragState.draggingNodeKey !== null) {
Object.assign(dragState, {
draggingNodeKey: null,
dropPosition: null,
dropContainerKey: null,
dropTargetKey: null,
dropLevelOffset: null,
dropAllowed: true,
dragOverNodeKey: null,
});
}
dragStartMousePosition = null;
currentMouseOverDroppableNodeKey = null;
};
// if onNodeDragEnd is called, onWindowDragEnd won't be called since stopPropagation() is called
const onNodeDragEnd: NodeDragEventHandler = (event, node) => {
const { onDragend } = props;
dragState.dragOverNodeKey = null;
cleanDragState();
onDragend?.({ event, node: node.eventData });
dragNode = null;
};
// since stopPropagation() is called in treeNode
// if onWindowDrag is called, whice means state is keeped, drag state should be cleared
const onWindowDragEnd = event => {
onNodeDragEnd(event, null, true);
window.removeEventListener('dragend', onWindowDragEnd);
};
const onNodeDragStart: NodeDragEventHandler = (event, node) => {
const { onDragstart } = props;
const { eventKey, eventData } = node;
dragNode = node;
dragStartMousePosition = {
x: event.clientX,
y: event.clientY,
};
const newExpandedKeys = arrDel(expandedKeys.value, eventKey);
dragState.draggingNodeKey = eventKey;
dragState.dragChildrenKeys = getDragChildrenKeys(eventKey, keyEntities.value);
indent.value = listRef.value.getIndentWidth();
setExpandedKeys(newExpandedKeys);
window.addEventListener('dragend', onWindowDragEnd);
if (onDragstart) {
onDragstart({ event, node: eventData });
}
};
/**
* [Legacy] Select handler is smaller than node,
* so that this will trigger when drag enter node or select handler.
* This is a little tricky if customize css without padding.
* Better for use mouse move event to refresh drag state.
* But let's just keep it to avoid event trigger logic change.
*/
const onNodeDragEnter = (event: DragEvent, node: DragNodeEvent) => {
const { onDragenter, onExpand, allowDrop, direction } = props;
const { pos, eventKey } = node;
// record the key of node which is latest entered, used in dragleave event.
if (currentMouseOverDroppableNodeKey !== eventKey) {
currentMouseOverDroppableNodeKey = eventKey;
}
if (!dragNode) {
resetDragState();
return;
}
const {
dropPosition,
dropLevelOffset,
dropTargetKey,
dropContainerKey,
dropTargetPos,
dropAllowed,
dragOverNodeKey,
} = calcDropPosition(
event,
dragNode,
node,
indent.value,
dragStartMousePosition,
allowDrop,
flattenNodes.value,
keyEntities.value,
expandedKeys.value,
direction,
);
if (
// don't allow drop inside its children
dragState.dragChildrenKeys.indexOf(dropTargetKey) !== -1 ||
// don't allow drop when drop is not allowed caculated by calcDropPosition
!dropAllowed
) {
resetDragState();
return;
}
// Side effect for delay drag
if (!delayedDragEnterLogic) {
delayedDragEnterLogic = {};
}
Object.keys(delayedDragEnterLogic).forEach(key => {
clearTimeout(delayedDragEnterLogic[key]);
});
if (dragNode.eventKey !== node.eventKey) {
// hoist expand logic here
// since if logic is on the bottom
// it will be blocked by abstract dragover node check
// => if you dragenter from top, you mouse will still be consider as in the top node
delayedDragEnterLogic[pos] = window.setTimeout(() => {
if (dragState.draggingNodeKey === null) return;
let newExpandedKeys = [...expandedKeys.value];
const entity = keyEntities.value[node.eventKey];
if (entity && (entity.children || []).length) {
newExpandedKeys = arrAdd(expandedKeys.value, node.eventKey);
}
setExpandedKeys(newExpandedKeys);
if (onExpand) {
onExpand(newExpandedKeys, {
node: node.eventData,
expanded: true,
nativeEvent: event,
});
}
}, 800);
}
// Skip if drag node is self
if (dragNode.eventKey === dropTargetKey && dropLevelOffset === 0) {
resetDragState();
return;
}
// Update drag over node and drag state
Object.assign(dragState, {
dragOverNodeKey,
dropPosition,
dropLevelOffset,
dropTargetKey,
dropContainerKey,
dropTargetPos,
dropAllowed,
});
if (onDragenter) {
onDragenter({
event,
node: node.eventData,
expandedKeys: expandedKeys.value,
});
}
};
const onNodeDragOver = (event: DragEvent, node: DragNodeEvent) => {
const { onDragover, allowDrop, direction } = props;
if (!dragNode) {
return;
}
const {
dropPosition,
dropLevelOffset,
dropTargetKey,
dropContainerKey,
dropAllowed,
dropTargetPos,
dragOverNodeKey,
} = calcDropPosition(
event,
dragNode,
node,
indent.value,
dragStartMousePosition,
allowDrop,
flattenNodes.value,
keyEntities.value,
expandedKeys.value,
direction,
);
if (dragState.dragChildrenKeys.indexOf(dropTargetKey) !== -1 || !dropAllowed) {
// don't allow drop inside its children
// don't allow drop when drop is not allowed caculated by calcDropPosition
return;
}
// Update drag position
if (dragNode.eventKey === dropTargetKey && dropLevelOffset === 0) {
if (
!(
dragState.dropPosition === null &&
dragState.dropLevelOffset === null &&
dragState.dropTargetKey === null &&
dragState.dropContainerKey === null &&
dragState.dropTargetPos === null &&
dragState.dropAllowed === false &&
dragState.dragOverNodeKey === null
)
) {
resetDragState();
}
} else if (
!(
dropPosition === dragState.dropPosition &&
dropLevelOffset === dragState.dropLevelOffset &&
dropTargetKey === dragState.dropTargetKey &&
dropContainerKey === dragState.dropContainerKey &&
dropTargetPos === dragState.dropTargetPos &&
dropAllowed === dragState.dropAllowed &&
dragOverNodeKey === dragState.dragOverNodeKey
)
) {
Object.assign(dragState, {
dropPosition,
dropLevelOffset,
dropTargetKey,
dropContainerKey,
dropTargetPos,
dropAllowed,
dragOverNodeKey,
});
}
if (onDragover) {
onDragover({ event, node: node.eventData });
}
};
const onNodeDragLeave: NodeDragEventHandler = (event, node) => {
// if it is outside the droppable area
// currentMouseOverDroppableNodeKey will be updated in dragenter event when into another droppable receiver.
if (
currentMouseOverDroppableNodeKey === node.eventKey &&
!(event.currentTarget as any).contains(event.relatedTarget as Node)
) {
resetDragState();
currentMouseOverDroppableNodeKey = null;
}
const { onDragleave } = props;
if (onDragleave) {
onDragleave({ event, node: node.eventData });
}
};
const onNodeDrop = (event: DragEvent, _node, outsideTree = false) => {
const { dragChildrenKeys, dropPosition, dropTargetKey, dropTargetPos, dropAllowed } =
dragState;
if (!dropAllowed) return;
const { onDrop } = props;
dragState.dragOverNodeKey = null;
cleanDragState();
if (dropTargetKey === null) return;
const abstractDropNodeProps = {
...getTreeNodeProps(dropTargetKey, treeNodeRequiredProps.value),
active: activeItem.value?.key === dropTargetKey,
data: keyEntities.value[dropTargetKey].node,
};
const dropToChild = dragChildrenKeys.indexOf(dropTargetKey) !== -1;
warning(
!dropToChild,
"Can not drop to dragNode's children node. Maybe this is a bug of ant-design-vue. Please report an issue.",
);
const posArr = posToArr(dropTargetPos);
const dropResult = {
event,
node: convertNodePropsToEventData(abstractDropNodeProps),
dragNode: dragNode ? dragNode.eventData : null,
dragNodesKeys: [dragNode.eventKey].concat(dragChildrenKeys),
dropToGap: dropPosition !== 0,
dropPosition: dropPosition + Number(posArr[posArr.length - 1]),
};
if (!outsideTree) {
onDrop?.(dropResult);
}
dragNode = null;
};
const onNodeClick: NodeMouseEventHandler = (e, treeNode) => {
const { onClick } = props;
if (onClick) {
onClick(e, treeNode);
}
};
const onNodeDoubleClick: NodeMouseEventHandler = (e, treeNode) => {
const { onDblclick } = props;
if (onDblclick) {
onDblclick(e, treeNode);
}
};
const onNodeSelect: NodeMouseEventHandler = (e, treeNode) => {
let newSelectedKeys = selectedKeys.value;
const { onSelect, multiple } = props;
const { selected } = treeNode;
const key = treeNode[fieldNames.value.key];
const targetSelected = !selected;
// Update selected keys
if (!targetSelected) {
newSelectedKeys = arrDel(newSelectedKeys, key);
} else if (!multiple) {
newSelectedKeys = [key];
} else {
newSelectedKeys = arrAdd(newSelectedKeys, key);
}
// [Legacy] Not found related usage in doc or upper libs
const keyEntitiesValue = keyEntities.value;
const selectedNodes = newSelectedKeys
.map(selectedKey => {
const entity = keyEntitiesValue[selectedKey];
if (!entity) return null;
return entity.node;
})
.filter(node => node);
if (props.selectedKeys === undefined) {
selectedKeys.value = newSelectedKeys;
}
if (onSelect) {
onSelect(newSelectedKeys, {
event: 'select',
selected: targetSelected,
node: treeNode,
selectedNodes,
nativeEvent: e,
});
}
};
const onNodeCheck = (e: MouseEvent, treeNode: EventDataNode, checked: boolean) => {
const { checkStrictly, onCheck } = props;
const key = treeNode[fieldNames.value.key];
// Prepare trigger arguments
let checkedObj;
const eventObj: Partial<CheckInfo> = {
event: 'check',
node: treeNode,
checked,
nativeEvent: e,
};
if (checkStrictly) {
const newCheckedKeys = checked
? arrAdd(checkedKeys.value, key)
: arrDel(checkedKeys.value, key);
const newHalfCheckedKeys = arrDel(halfCheckedKeys.value, key);
checkedObj = { checked: newCheckedKeys, halfChecked: newHalfCheckedKeys };
const keyEntitiesValue = keyEntities.value;
eventObj.checkedNodes = newCheckedKeys
.map(checkedKey => keyEntitiesValue[checkedKey])
.filter(entity => entity)
.map(entity => entity.node);
if (props.checkedKeys === undefined) {
checkedKeys.value = newCheckedKeys;
}
} else {
// Always fill first
let { checkedKeys: newCheckedKeys, halfCheckedKeys: newHalfCheckedKeys } = conductCheck(
[...checkedKeys.value, key],
true,
keyEntities.value,
);
// If remove, we do it again to correction
if (!checked) {
const keySet = new Set(newCheckedKeys);
keySet.delete(key);
({ checkedKeys: newCheckedKeys, halfCheckedKeys: newHalfCheckedKeys } = conductCheck(
Array.from(keySet),
{ checked: false, halfCheckedKeys: newHalfCheckedKeys },
keyEntities.value,
));
}
checkedObj = newCheckedKeys;
// [Legacy] This is used for vc-tree-select`
eventObj.checkedNodes = [];
eventObj.checkedNodesPositions = [];
eventObj.halfCheckedKeys = newHalfCheckedKeys;
newCheckedKeys.forEach(checkedKey => {
const entity = keyEntities.value[checkedKey];
if (!entity) return;
const { node, pos } = entity;
eventObj.checkedNodes.push(node);
eventObj.checkedNodesPositions.push({ node, pos });
});
if (props.checkedKeys === undefined) {
checkedKeys.value = newCheckedKeys;
halfCheckedKeys.value = newHalfCheckedKeys;
}
}
if (onCheck) {
onCheck(checkedObj, eventObj as CheckInfo);
}
};
const onNodeLoad = (treeNode: EventDataNode) => {
const key = treeNode[fieldNames.value.key];
const loadPromise = new Promise<void>((resolve, reject) => {
// We need to get the latest state of loading/loaded keys
const { loadData, onLoad } = props;
if (
!loadData ||
loadedKeys.value.indexOf(key) !== -1 ||
loadingKeys.value.indexOf(key) !== -1
) {
return null;
}
// Process load data
const promise = loadData(treeNode);
promise
.then(() => {
const newLoadedKeys = arrAdd(loadedKeys.value, key);
const newLoadingKeys = arrDel(loadingKeys.value, key);
// onLoad should trigger before internal setState to avoid `loadData` trigger twice.
// https://github.com/ant-design/ant-design/issues/12464
if (onLoad) {
onLoad(newLoadedKeys, {
event: 'load',
node: treeNode,
});
}
if (props.loadedKeys === undefined) {
loadedKeys.value = newLoadedKeys;
}
loadingKeys.value = newLoadingKeys;
resolve();
})
.catch(e => {
const newLoadingKeys = arrDel(loadingKeys.value, key);
loadingKeys.value = newLoadingKeys;
// If exceed max retry times, we give up retry
loadingRetryTimes[key] = (loadingRetryTimes[key] || 0) + 1;
if (loadingRetryTimes[key] >= MAX_RETRY_TIMES) {
warning(false, 'Retry for `loadData` many times but still failed. No more retry.');
const newLoadedKeys = arrAdd(loadedKeys.value, key);
if (props.loadedKeys === undefined) {
loadedKeys.value = newLoadedKeys;
}
resolve();
}
reject(e);
});
loadingKeys.value = arrAdd(loadingKeys.value, key);
});
// Not care warning if we ignore this
loadPromise.catch(() => {});
return loadPromise;
};
const onNodeMouseEnter: NodeMouseEventHandler = (event, node) => {
const { onMouseenter } = props;
if (onMouseenter) {
onMouseenter({ event, node });
}
};
const onNodeMouseLeave: NodeMouseEventHandler = (event, node) => {
const { onMouseleave } = props;
if (onMouseleave) {
onMouseleave({ event, node });
}
};
const onNodeContextMenu: NodeMouseEventHandler = (event, node) => {
const { onRightClick } = props;
if (onRightClick) {
event.preventDefault();
onRightClick({ event, node });
}
};
const onFocus = (e: FocusEvent) => {
const { onFocus } = props;
focused.value = true;
if (onFocus) {
onFocus(e);
}
};
const onBlur = (e: FocusEvent) => {
const { onBlur } = props;
focused.value = false;
onActiveChange(null);
if (onBlur) {
onBlur(e);
}
};
const onNodeExpand = (e: MouseEvent, treeNode: EventDataNode) => {
let newExpandedKeys = expandedKeys.value;
const { onExpand, loadData } = props;
const { expanded } = treeNode;
const key = treeNode[fieldNames.value.key];
// Do nothing when motion is in progress
if (listChanging.value) {
return;
}
// Update selected keys
const index = newExpandedKeys.indexOf(key);
const targetExpanded = !expanded;
warning(
(expanded && index !== -1) || (!expanded && index === -1),
'Expand state not sync with index check',
);
if (targetExpanded) {
newExpandedKeys = arrAdd(newExpandedKeys, key);
} else {
newExpandedKeys = arrDel(newExpandedKeys, key);
}
setExpandedKeys(newExpandedKeys);
if (onExpand) {
onExpand(newExpandedKeys, {
node: treeNode,
expanded: targetExpanded,
nativeEvent: e,
});
}
// Async Load data
if (targetExpanded && loadData) {
const loadPromise = onNodeLoad(treeNode);
if (loadPromise) {
loadPromise
.then(() => {
// [Legacy] Refresh logic
// const newFlattenTreeData = flattenTreeData(
// treeData.value,
// newExpandedKeys,
// fieldNames.value,
// );
// flattenNodes.value = newFlattenTreeData;
})
.catch(e => {
const expandedKeysToRestore = arrDel(expandedKeys.value, key);
setExpandedKeys(expandedKeysToRestore);
Promise.reject(e);
});
}
}
};
const onListChangeStart = () => {
listChanging.value = true;
};
const onListChangeEnd = () => {
setTimeout(() => {
listChanging.value = false;
});
};
// =========================== Keyboard ===========================
const onActiveChange = (newActiveKey: Key) => {
const { onActiveChange } = props;
if (activeKey.value === newActiveKey) {
return;
}
if (props.activeKey !== undefined) {
activeKey.value = newActiveKey;
}
if (newActiveKey !== null) {
scrollTo({ key: newActiveKey });
}
if (onActiveChange) {
onActiveChange(newActiveKey);
}
};
const activeItem = computed<FlattenNode>(() => {
if (activeKey.value === null) {
return null;
}
return flattenNodes.value.find(({ key }) => key === activeKey.value) || null;
});
const offsetActiveKey = (offset: number) => {
let index = flattenNodes.value.findIndex(({ key }) => key === activeKey.value);
// Align with index
if (index === -1 && offset < 0) {
index = flattenNodes.value.length;
}
index = (index + offset + flattenNodes.value.length) % flattenNodes.value.length;
const item = flattenNodes.value[index];
if (item) {
const { key } = item;
onActiveChange(key);
} else {
onActiveChange(null);
}
};
const activeItemEventNode = computed(() => {
return convertNodePropsToEventData({
...getTreeNodeProps(activeKey.value, treeNodeRequiredProps.value),
data: activeItem.value.data,
active: true,
});
});
const onKeydown = event => {
const { onKeydown, checkable, selectable } = props;
// >>>>>>>>>> Direction
switch (event.which) {
case KeyCode.UP: {
offsetActiveKey(-1);
event.preventDefault();
break;
}
case KeyCode.DOWN: {
offsetActiveKey(1);
event.preventDefault();
break;
}
}
// >>>>>>>>>> Expand & Selection
const item = activeItem.value;
if (item && item.data) {
const expandable = item.data.isLeaf === false || !!(item.data.children || []).length;
const eventNode = activeItemEventNode.value;
switch (event.which) {
// >>> Expand
case KeyCode.LEFT: {
// Collapse if possible
if (expandable && expandedKeys.value.includes(activeKey.value)) {
onNodeExpand({} as MouseEvent, eventNode);
} else if (item.parent) {
onActiveChange(item.parent.key);
}
event.preventDefault();
break;
}
case KeyCode.RIGHT: {
// Expand if possible
if (expandable && !expandedKeys.value.includes(activeKey.value)) {
onNodeExpand({} as MouseEvent, eventNode);
} else if (item.children && item.children.length) {
onActiveChange(item.children[0].key);
}
event.preventDefault();
break;
}
// Selection
case KeyCode.ENTER:
case KeyCode.SPACE: {
if (
checkable &&
!eventNode.disabled &&
eventNode.checkable !== false &&
!eventNode.disableCheckbox
) {
onNodeCheck(
{} as MouseEvent,
eventNode,
!checkedKeys.value.includes(activeKey.value),
);
} else if (
!checkable &&
selectable &&
!eventNode.disabled &&
eventNode.selectable !== false
) {
onNodeSelect({} as MouseEvent, eventNode);
}
break;
}
}
}
if (onKeydown) {
onKeydown(event);
}
};
expose({
onNodeExpand,
scrollTo,
onKeydown,
selectedKeys: computed(() => selectedKeys.value),
checkedKeys: computed(() => checkedKeys.value),
halfCheckedKeys: computed(() => halfCheckedKeys.value),
loadedKeys: computed(() => loadedKeys.value),
loadingKeys: computed(() => loadingKeys.value),
expandedKeys: computed(() => expandedKeys.value),
});
onUnmounted(() => {
window.removeEventListener('dragend', onWindowDragEnd);
destroyed.value = true;
});
return () => {
const {
// focused,
// flattenNodes,
// keyEntities,
draggingNodeKey,
// activeKey,
dropLevelOffset,
dropContainerKey,
dropTargetKey,
dropPosition,
dragOverNodeKey,
// indent,
} = dragState;
const {
prefixCls,
showLine,
focusable,
tabindex = 0,
selectable,
showIcon,
icon = slots.icon,
switcherIcon,
draggable,
checkable,
checkStrictly,
disabled,
motion,
loadData,
filterTreeNode,
height,
itemHeight,
virtual,
dropIndicatorRender,
onContextmenu,
onScroll,
direction,
} = props;
const { class: className, style } = attrs;
const domProps = pickAttrs(
{ ...props, ...attrs },
{
aria: true,
data: true,
},
);
// It's better move to hooks but we just simply keep here
let draggableConfig: DraggableConfig;
if (draggable) {
if (typeof draggable === 'object') {
draggableConfig = draggable;
} else if (typeof draggable === 'function') {
draggableConfig = {
nodeDraggable: draggable,
};
} else {
draggableConfig = {};
}
}
return (
<TreeContext
value={{
prefixCls,
selectable,
showIcon,
icon,
switcherIcon,
draggable: draggableConfig,
draggingNodeKey,
checkable,
customCheckable: slots.checkable,
checkStrictly,
disabled,
keyEntities: keyEntities.value,
dropLevelOffset,
dropContainerKey,
dropTargetKey,
dropPosition,
dragOverNodeKey,
indent: indent.value,
direction,
dropIndicatorRender,
loadData,
filterTreeNode,
onNodeClick,
onNodeDoubleClick,
onNodeExpand,
onNodeSelect,
onNodeCheck,
onNodeLoad,
onNodeMouseEnter,
onNodeMouseLeave,
onNodeContextMenu,
onNodeDragStart,
onNodeDragEnter,
onNodeDragOver,
onNodeDragLeave,
onNodeDragEnd,
onNodeDrop,
slots,
}}
>
<div
role="tree"
class={classNames(prefixCls, className, {
[`${prefixCls}-show-line`]: showLine,
[`${prefixCls}-focused`]: focused.value,
[`${prefixCls}-active-focused`]: activeKey.value !== null,
})}
>
<NodeList
ref={listRef}
prefixCls={prefixCls}
style={style}
data={flattenNodes.value}
disabled={disabled}
selectable={selectable}
checkable={!!checkable}
motion={motion}
dragging={draggingNodeKey !== null}
height={height}
itemHeight={itemHeight}
virtual={virtual}
focusable={focusable}
focused={focused.value}
tabindex={tabindex}
activeItem={activeItem.value}
onFocus={onFocus}
onBlur={onBlur}
onKeydown={onKeydown}
onActiveChange={onActiveChange}
onListChangeStart={onListChangeStart}
onListChangeEnd={onListChangeEnd}
onContextmenu={onContextmenu}
onScroll={onScroll}
{...treeNodeRequiredProps.value}
{...domProps}
/>
</div>
</TreeContext>
);
};
},
});