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@odymaui/angular-tree-component

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A simple yet powerful tree component for Angular16. WARNING: This is an unsupported fork for use in a dependent project to upgrade it to Angular 16. Unit tests pass and the example-app works as expected.

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import { Injectable } from '@angular/core'; import { observable, computed, action, autorun, makeObservable } from 'mobx'; import { TreeNode } from './tree-node.model'; import { TreeOptions } from './tree-options.model'; import { TREE_EVENTS } from '../constants/events'; import * as i0 from "@angular/core"; export class TreeModel { static focusedTree = null; options = new TreeOptions(); nodes; eventNames = Object.keys(TREE_EVENTS); virtualScroll; roots; expandedNodeIds = {}; selectedLeafNodeIds = {}; activeNodeIds = {}; hiddenNodeIds = {}; focusedNodeId = null; virtualRoot; firstUpdate = true; events; subscriptions = []; constructor() { makeObservable(this, { roots: observable, expandedNodeIds: observable, selectedLeafNodeIds: observable, activeNodeIds: observable, hiddenNodeIds: observable, focusedNodeId: observable, virtualRoot: observable, focusedNode: computed, expandedNodes: computed, activeNodes: computed, hiddenNodes: computed, selectedLeafNodes: computed, setData: action, update: action, setFocusedNode: action, setFocus: action, doForAll: action, focusNextNode: action, focusPreviousNode: action, focusDrillDown: action, focusDrillUp: action, setActiveNode: action, setSelectedNode: action, setExpandedNode: action, expandAll: action, collapseAll: action, setIsHidden: action, setHiddenNodeIds: action, filterNodes: action, clearFilter: action, moveNode: action, copyNode: action, setState: action, }); } // events fireEvent(event) { event.treeModel = this; this.events[event.eventName].emit(event); this.events.event.emit(event); } subscribe(eventName, fn) { const subscription = this.events[eventName].subscribe(fn); this.subscriptions.push(subscription); } // getters getFocusedNode() { return this.focusedNode; } getActiveNode() { return this.activeNodes[0]; } getActiveNodes() { return this.activeNodes; } getVisibleRoots() { return this.virtualRoot.visibleChildren; } getFirstRoot(skipHidden = false) { const root = skipHidden ? this.getVisibleRoots() : this.roots; return root != null && root.length ? root[0] : null; } getLastRoot(skipHidden = false) { const root = skipHidden ? this.getVisibleRoots() : this.roots; return root != null && root.length ? root[root.length - 1] : null; } get isFocused() { return TreeModel.focusedTree === this; } isNodeFocused(node) { return this.focusedNode === node; } isEmptyTree() { return this.roots && this.roots.length === 0; } get focusedNode() { return this.focusedNodeId ? this.getNodeById(this.focusedNodeId) : null; } get expandedNodes() { const nodes = Object.keys(this.expandedNodeIds) .filter((id) => this.expandedNodeIds[id]) .map((id) => this.getNodeById(id)); return nodes.filter(Boolean); } get activeNodes() { const nodes = Object.keys(this.activeNodeIds) .filter((id) => this.activeNodeIds[id]) .map((id) => this.getNodeById(id)); return nodes.filter(Boolean); } get hiddenNodes() { const nodes = Object.keys(this.hiddenNodeIds) .filter((id) => this.hiddenNodeIds[id]) .map((id) => this.getNodeById(id)); return nodes.filter(Boolean); } get selectedLeafNodes() { const nodes = Object.keys(this.selectedLeafNodeIds) .filter((id) => this.selectedLeafNodeIds[id]) .map((id) => this.getNodeById(id)); return nodes.filter(Boolean); } // locating nodes getNodeByPath(path, startNode = null) { if (!path) return null; startNode = startNode || this.virtualRoot; if (path.length === 0) return startNode; if (!startNode.children) return null; const childId = path.shift(); const childNode = startNode.children.find(c => c.id === childId); if (!childNode) return null; return this.getNodeByPath(path, childNode); } getNodeById(id) { const idStr = id.toString(); return this.getNodeBy((node) => node.id.toString() === idStr); } getNodeBy(predicate, startNode = null) { startNode = startNode || this.virtualRoot; if (!startNode.children) return null; const found = startNode.children.find(predicate); if (found) { // found in children return found; } else { // look in children's children for (let child of startNode.children) { const foundInChildren = this.getNodeBy(predicate, child); if (foundInChildren) return foundInChildren; } } } isExpanded(node) { return this.expandedNodeIds[node.id]; } isHidden(node) { return this.hiddenNodeIds[node.id]; } isActive(node) { return this.activeNodeIds[node.id]; } isSelected(node) { return this.selectedLeafNodeIds[node.id]; } ngOnDestroy() { this.dispose(); this.unsubscribeAll(); } dispose() { // Dispose reactions of the replaced nodes if (this.virtualRoot) { this.virtualRoot.dispose(); } } unsubscribeAll() { this.subscriptions.forEach(subscription => subscription.unsubscribe()); this.subscriptions = []; } // actions setData({ nodes, options = null, events = null }) { if (options) { this.options = new TreeOptions(options); } if (events) { this.events = events; } if (nodes) { this.nodes = nodes; } this.update(); } update() { // Rebuild tree: let virtualRootConfig = { id: this.options.rootId, virtual: true, [this.options.childrenField]: this.nodes }; this.dispose(); this.virtualRoot = new TreeNode(virtualRootConfig, null, this, 0); this.roots = this.virtualRoot.children; // Fire event: if (this.firstUpdate) { if (this.roots) { this.firstUpdate = false; this._calculateExpandedNodes(); } } else { this.fireEvent({ eventName: TREE_EVENTS.updateData }); } } setFocusedNode(node) { this.focusedNodeId = node ? node.id : null; } setFocus(value) { TreeModel.focusedTree = value ? this : null; } doForAll(fn) { this.roots.forEach((root) => root.doForAll(fn)); } focusNextNode() { let previousNode = this.getFocusedNode(); let nextNode = previousNode ? previousNode.findNextNode(true, true) : this.getFirstRoot(true); if (nextNode) nextNode.focus(); } focusPreviousNode() { let previousNode = this.getFocusedNode(); let nextNode = previousNode ? previousNode.findPreviousNode(true) : this.getLastRoot(true); if (nextNode) nextNode.focus(); } focusDrillDown() { let previousNode = this.getFocusedNode(); if (previousNode && previousNode.isCollapsed && previousNode.hasChildren) { previousNode.toggleExpanded(); } else { let nextNode = previousNode ? previousNode.getFirstChild(true) : this.getFirstRoot(true); if (nextNode) nextNode.focus(); } } focusDrillUp() { let previousNode = this.getFocusedNode(); if (!previousNode) return; if (previousNode.isExpanded) { previousNode.toggleExpanded(); } else { let nextNode = previousNode.realParent; if (nextNode) nextNode.focus(); } } setActiveNode(node, value, multi = false) { if (multi) { this._setActiveNodeMulti(node, value); } else { this._setActiveNodeSingle(node, value); } if (value) { node.focus(this.options.scrollOnActivate); this.fireEvent({ eventName: TREE_EVENTS.activate, node }); this.fireEvent({ eventName: TREE_EVENTS.nodeActivate, node }); // For IE11 } else { this.fireEvent({ eventName: TREE_EVENTS.deactivate, node }); this.fireEvent({ eventName: TREE_EVENTS.nodeDeactivate, node }); // For IE11 } } setSelectedNode(node, value) { this.selectedLeafNodeIds = Object.assign({}, this.selectedLeafNodeIds, { [node.id]: value }); if (value) { node.focus(); this.fireEvent({ eventName: TREE_EVENTS.select, node }); } else { this.fireEvent({ eventName: TREE_EVENTS.deselect, node }); } } setExpandedNode(node, value) { this.expandedNodeIds = Object.assign({}, this.expandedNodeIds, { [node.id]: value }); this.fireEvent({ eventName: TREE_EVENTS.toggleExpanded, node, isExpanded: value }); } expandAll() { this.roots.forEach((root) => root.expandAll()); } collapseAll() { this.roots.forEach((root) => root.collapseAll()); } setIsHidden(node, value) { this.hiddenNodeIds = Object.assign({}, this.hiddenNodeIds, { [node.id]: value }); } setHiddenNodeIds(nodeIds) { this.hiddenNodeIds = nodeIds.reduce((hiddenNodeIds, id) => Object.assign(hiddenNodeIds, { [id]: true }), {}); } performKeyAction(node, $event) { const keyAction = this.options.actionMapping.keys[$event.keyCode]; if (keyAction) { $event.preventDefault(); keyAction(this, node, $event); return true; } else { return false; } } filterNodes(filter, autoShow = true) { let filterFn; if (!filter) { return this.clearFilter(); } // support function and string filter if (filter && typeof filter.valueOf() === 'string') { filterFn = (node) => node.displayField.toLowerCase().indexOf(filter.toLowerCase()) !== -1; } else if (filter && typeof filter === 'function') { filterFn = filter; } else { console.error('Don\'t know what to do with filter', filter); console.error('Should be either a string or function'); return; } const ids = {}; this.roots.forEach((node) => this._filterNode(ids, node, filterFn, autoShow)); this.hiddenNodeIds = ids; this.fireEvent({ eventName: TREE_EVENTS.changeFilter }); } clearFilter() { this.hiddenNodeIds = {}; this.fireEvent({ eventName: TREE_EVENTS.changeFilter }); } moveNode(node, to) { const fromIndex = node.getIndexInParent(); const fromParent = node.parent; if (!this.canMoveNode(node, to, fromIndex)) return; const fromChildren = fromParent.getField('children'); // If node doesn't have children - create children array if (!to.parent.getField('children')) { to.parent.setField('children', []); } const toChildren = to.parent.getField('children'); const originalNode = fromChildren.splice(fromIndex, 1)[0]; // Compensate for index if already removed from parent: let toIndex = (fromParent === to.parent && to.index > fromIndex) ? to.index - 1 : to.index; toChildren.splice(toIndex, 0, originalNode); fromParent.treeModel.update(); if (to.parent.treeModel !== fromParent.treeModel) { to.parent.treeModel.update(); } this.fireEvent({ eventName: TREE_EVENTS.moveNode, node: originalNode, to: { parent: to.parent.data, index: toIndex }, from: { parent: fromParent.data, index: fromIndex } }); } copyNode(node, to) { const fromIndex = node.getIndexInParent(); if (!this.canMoveNode(node, to, fromIndex)) return; // If node doesn't have children - create children array if (!to.parent.getField('children')) { to.parent.setField('children', []); } const toChildren = to.parent.getField('children'); const nodeCopy = this.options.getNodeClone(node); toChildren.splice(to.index, 0, nodeCopy); node.treeModel.update(); if (to.parent.treeModel !== node.treeModel) { to.parent.treeModel.update(); } this.fireEvent({ eventName: TREE_EVENTS.copyNode, node: nodeCopy, to: { parent: to.parent.data, index: to.index } }); } getState() { return { expandedNodeIds: this.expandedNodeIds, selectedLeafNodeIds: this.selectedLeafNodeIds, activeNodeIds: this.activeNodeIds, hiddenNodeIds: this.hiddenNodeIds, focusedNodeId: this.focusedNodeId }; } setState(state) { if (!state) return; Object.assign(this, { expandedNodeIds: state.expandedNodeIds || {}, selectedLeafNodeIds: state.selectedLeafNodeIds || {}, activeNodeIds: state.activeNodeIds || {}, hiddenNodeIds: state.hiddenNodeIds || {}, focusedNodeId: state.focusedNodeId }); } subscribeToState(fn) { autorun(() => fn(this.getState())); } canMoveNode(node, to, fromIndex = undefined) { const fromNodeIndex = fromIndex || node.getIndexInParent(); // same node: if (node.parent === to.parent && fromIndex === to.index) { return false; } return !to.parent.isDescendantOf(node); } calculateExpandedNodes() { this._calculateExpandedNodes(); } // private methods _filterNode(ids, node, filterFn, autoShow) { // if node passes function then it's visible let isVisible = filterFn(node); if (node.children) { // if one of node's children passes filter then this node is also visible node.children.forEach((child) => { if (this._filterNode(ids, child, filterFn, autoShow)) { isVisible = true; } }); } // mark node as hidden if (!isVisible) { ids[node.id] = true; } // auto expand parents to make sure the filtered nodes are visible if (autoShow && isVisible) { node.ensureVisible(); } return isVisible; } _calculateExpandedNodes(startNode = null) { startNode = startNode || this.virtualRoot; if (startNode.data[this.options.isExpandedField]) { this.expandedNodeIds = Object.assign({}, this.expandedNodeIds, { [startNode.id]: true }); } if (startNode.children) { startNode.children.forEach((child) => this._calculateExpandedNodes(child)); } } _setActiveNodeSingle(node, value) { // Deactivate all other nodes: this.activeNodes .filter((activeNode) => activeNode !== node) .forEach((activeNode) => { this.fireEvent({ eventName: TREE_EVENTS.deactivate, node: activeNode }); this.fireEvent({ eventName: TREE_EVENTS.nodeDeactivate, node: activeNode }); // For IE11 }); if (value) { this.activeNodeIds = { [node.id]: true }; } else { this.activeNodeIds = {}; } } _setActiveNodeMulti(node, value) { this.activeNodeIds = Object.assign({}, this.activeNodeIds, { [node.id]: value }); } /** @nocollapse */ static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.2", ngImport: i0, type: TreeModel, deps: [], target: i0.ɵɵFactoryTarget.Injectable }); /** @nocollapse */ static ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.1.2", ngImport: i0, type: TreeModel }); } i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.2", ngImport: i0, type: TreeModel, decorators: [{ type: Injectable }], ctorParameters: function () { return []; } }); //# 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{ Injectable, OnDestroy } from '@angular/core';\r\nimport { observable, computed, action, autorun, makeObservable } from 'mobx';\r\nimport { Subscription } from 'rxjs';\r\nimport { TreeNode } from './tree-node.model';\r\nimport { TreeOptions } from './tree-options.model';\r\nimport { TreeVirtualScroll } from './tree-virtual-scroll.model';\r\nimport { ITreeModel, IDType, IDTypeDictionary } from '../defs/api';\r\nimport { TREE_EVENTS } from '../constants/events';\r\n\r\n@Injectable()\r\nexport class TreeModel implements ITreeModel, OnDestroy {\r\n  static focusedTree = null;\r\n\r\n  options: TreeOptions = new TreeOptions();\r\n  nodes: any[];\r\n  eventNames = Object.keys(TREE_EVENTS);\r\n  virtualScroll: TreeVirtualScroll;\r\n\r\n  roots: TreeNode[];\r\n  expandedNodeIds: IDTypeDictionary = {};\r\n  selectedLeafNodeIds: IDTypeDictionary = {};\r\n  activeNodeIds: IDTypeDictionary = {};\r\n  hiddenNodeIds: IDTypeDictionary = {};\r\n  focusedNodeId: IDType = null;\r\n  virtualRoot: TreeNode;\r\n\r\n  private firstUpdate = true;\r\n  private events: any;\r\n  private subscriptions: Subscription[] = [];\r\n\r\n  constructor() {\r\n    makeObservable(this, {\r\n      roots: observable,\r\n      expandedNodeIds: observable,\r\n      selectedLeafNodeIds: observable,\r\n      activeNodeIds: observable,\r\n      hiddenNodeIds: observable,\r\n      focusedNodeId: observable,\r\n      virtualRoot: observable,\r\n\r\n      focusedNode: computed,\r\n      expandedNodes: computed,\r\n      activeNodes: computed,\r\n      hiddenNodes: computed,\r\n      selectedLeafNodes: computed,\r\n      setData: action,\r\n      update: action,\r\n      setFocusedNode: action,\r\n      setFocus: action,\r\n      doForAll: action,\r\n      focusNextNode: action,\r\n      focusPreviousNode: action,\r\n      focusDrillDown: action,\r\n      focusDrillUp: action,\r\n      setActiveNode: action,\r\n      setSelectedNode: action,\r\n      setExpandedNode:action,\r\n      expandAll: action,\r\n      collapseAll:action,\r\n      setIsHidden:action,\r\n      setHiddenNodeIds:action,\r\n      filterNodes: action,\r\n      clearFilter: action,\r\n      moveNode: action,\r\n      copyNode: action,\r\n      setState: action,\r\n      \r\n    });\r\n  }\r\n\r\n  // events\r\n  fireEvent(event) {\r\n    event.treeModel = this;\r\n    this.events[event.eventName].emit(event);\r\n    this.events.event.emit(event);\r\n  }\r\n\r\n  subscribe(eventName, fn) {\r\n    const subscription = this.events[eventName].subscribe(fn);\r\n    this.subscriptions.push(subscription);\r\n  }\r\n\r\n\r\n  // getters\r\n  getFocusedNode(): TreeNode {\r\n    return this.focusedNode;\r\n  }\r\n\r\n\r\n  getActiveNode(): TreeNode {\r\n    return this.activeNodes[0];\r\n  }\r\n\r\n  getActiveNodes(): TreeNode[] {\r\n    return this.activeNodes;\r\n  }\r\n\r\n  getVisibleRoots() {\r\n    return this.virtualRoot.visibleChildren;\r\n  }\r\n\r\n  getFirstRoot(skipHidden = false) {\r\n    const root = skipHidden ? this.getVisibleRoots() : this.roots;\r\n    return root != null && root.length ? root[0] : null;\r\n  }\r\n\r\n  getLastRoot(skipHidden = false) {\r\n    const root = skipHidden ? this.getVisibleRoots() : this.roots;\r\n    return root != null && root.length ? root[root.length - 1] : null;\r\n  }\r\n\r\n  get isFocused() {\r\n    return TreeModel.focusedTree === this;\r\n  }\r\n\r\n  isNodeFocused(node) {\r\n    return this.focusedNode === node;\r\n  }\r\n\r\n  isEmptyTree(): boolean {\r\n    return this.roots && this.roots.length === 0;\r\n  }\r\n\r\n  get focusedNode() {\r\n    return this.focusedNodeId ? this.getNodeById(this.focusedNodeId) : null;\r\n  }\r\n\r\n  get expandedNodes() {\r\n    const nodes = Object.keys(this.expandedNodeIds)\r\n      .filter((id) => this.expandedNodeIds[id])\r\n      .map((id) => this.getNodeById(id));\r\n\r\n    return nodes.filter(Boolean);\r\n  }\r\n\r\n  get activeNodes() {\r\n    const nodes = Object.keys(this.activeNodeIds)\r\n      .filter((id) => this.activeNodeIds[id])\r\n      .map((id) => this.getNodeById(id));\r\n\r\n    return nodes.filter(Boolean);\r\n  }\r\n\r\n  get hiddenNodes() {\r\n    const nodes = Object.keys(this.hiddenNodeIds)\r\n        .filter((id) => this.hiddenNodeIds[id])\r\n        .map((id) => this.getNodeById(id));\r\n\r\n    return nodes.filter(Boolean);\r\n  }\r\n\r\n  get selectedLeafNodes() {\r\n    const nodes = Object.keys(this.selectedLeafNodeIds)\r\n        .filter((id) => this.selectedLeafNodeIds[id])\r\n        .map((id) => this.getNodeById(id));\r\n\r\n    return nodes.filter(Boolean);\r\n  }\r\n\r\n  // locating nodes\r\n  getNodeByPath(path: any[], startNode= null): TreeNode {\r\n    if (!path) return null;\r\n\r\n    startNode = startNode || this.virtualRoot;\r\n    if (path.length === 0) return startNode;\r\n\r\n    if (!startNode.children) return null;\r\n\r\n    const childId = path.shift();\r\n    const childNode = startNode.children.find(c => c.id === childId);\r\n\r\n    if (!childNode) return null;\r\n\r\n    return this.getNodeByPath(path, childNode);\r\n  }\r\n\r\n  getNodeById(id) {\r\n    const idStr = id.toString();\r\n\r\n    return this.getNodeBy((node) => node.id.toString() === idStr);\r\n  }\r\n\r\n  getNodeBy(predicate, startNode = null) {\r\n    startNode = startNode || this.virtualRoot;\r\n\r\n    if (!startNode.children) return null;\r\n\r\n    const found = startNode.children.find(predicate);\r\n\r\n    if (found) { // found in children\r\n      return found;\r\n    } else { // look in children's children\r\n      for (let child of startNode.children) {\r\n        const foundInChildren = this.getNodeBy(predicate, child);\r\n        if (foundInChildren) return foundInChildren;\r\n      }\r\n    }\r\n  }\r\n\r\n  isExpanded(node) {\r\n    return this.expandedNodeIds[node.id];\r\n  }\r\n\r\n  isHidden(node) {\r\n    return this.hiddenNodeIds[node.id];\r\n  }\r\n\r\n  isActive(node) {\r\n    return this.activeNodeIds[node.id];\r\n  }\r\n\r\n  isSelected(node) {\r\n    return this.selectedLeafNodeIds[node.id];\r\n  }\r\n\r\n  ngOnDestroy() {\r\n    this.dispose();\r\n    this.unsubscribeAll();\r\n  }\r\n\r\n  dispose() {\r\n    // Dispose reactions of the replaced nodes\r\n    if (this.virtualRoot) {\r\n      this.virtualRoot.dispose();\r\n    }\r\n  }\r\n\r\n  unsubscribeAll() {\r\n    this.subscriptions.forEach(subscription => subscription.unsubscribe());\r\n    this.subscriptions = [];\r\n  }\r\n\r\n  // actions\r\n  setData({ nodes, options = null, events = null }: {nodes: any, options: any, events: any}) {\r\n    if (options) {\r\n      this.options = new TreeOptions(options);\r\n    }\r\n    if (events) {\r\n      this.events = events;\r\n    }\r\n    if (nodes) {\r\n      this.nodes = nodes;\r\n    }\r\n\r\n    this.update();\r\n  }\r\n\r\n  update() {\r\n    // Rebuild tree:\r\n    let virtualRootConfig = {\r\n      id: this.options.rootId,\r\n      virtual: true,\r\n      [this.options.childrenField]: this.nodes\r\n    };\r\n\r\n    this.dispose();\r\n\r\n    this.virtualRoot = new TreeNode(virtualRootConfig, null, this, 0);\r\n\r\n    this.roots = this.virtualRoot.children;\r\n\r\n    // Fire event:\r\n    if (this.firstUpdate) {\r\n      if (this.roots) {\r\n        this.firstUpdate = false;\r\n        this._calculateExpandedNodes();\r\n      }\r\n    } else {\r\n      this.fireEvent({ eventName: TREE_EVENTS.updateData });\r\n    }\r\n  }\r\n\r\n\r\n  setFocusedNode(node) {\r\n    this.focusedNodeId = node ? node.id : null;\r\n  }\r\n\r\n  setFocus(value) {\r\n    TreeModel.focusedTree = value ? this : null;\r\n  }\r\n\r\n  doForAll(fn) {\r\n    this.roots.forEach((root) => root.doForAll(fn));\r\n  }\r\n\r\n  focusNextNode() {\r\n    let previousNode = this.getFocusedNode();\r\n    let nextNode = previousNode ? previousNode.findNextNode(true, true) : this.getFirstRoot(true);\r\n    if (nextNode) nextNode.focus();\r\n  }\r\n\r\n  focusPreviousNode() {\r\n    let previousNode = this.getFocusedNode();\r\n    let nextNode = previousNode ? previousNode.findPreviousNode(true) : this.getLastRoot(true);\r\n    if (nextNode