ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
78 lines • 11.3 kB
JavaScript
/**
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
*/
import { SelectionModel } from '@angular/cdk/collections';
import { BehaviorSubject, merge } from 'rxjs';
import { map } from 'rxjs/operators';
export class NzGraphData {
constructor(source) {
this._data = new BehaviorSubject({});
/** A selection model with multi-selection to track expansion status. */
this.expansionModel = new SelectionModel(true);
if (source) {
this.expansionModel?.clear();
this.dataSource = source;
this._data.next(source);
}
}
/** Toggles one single data node's expanded/collapsed state. */
toggle(nodeName) {
this.expansionModel.toggle(nodeName);
}
/** Expands one single data node. */
expand(nodeName) {
const compound = this.dataSource.compound || {};
const toBeSelected = this.findParents(compound, nodeName, [nodeName]);
this.expansionModel.select(...toBeSelected);
}
/** Collapses one single data node. */
collapse(nodeName) {
const compound = this.dataSource.compound || {};
const toBeDeselected = this.findChildren(compound, nodeName, [nodeName]);
this.expansionModel.deselect(...toBeDeselected);
}
/** Whether a given data node is expanded or not. Returns true if the data node is expanded. */
isExpanded(nodeName) {
return this.expansionModel.isSelected(nodeName);
}
/** Collapse all dataNodes in the tree. */
collapseAll() {
this.expansionModel.clear();
}
expandAll() {
this.expansionModel.select(...Object.keys(this._data.value.compound || {}));
}
setData(data) {
this.expansionModel?.clear();
this.dataSource = data;
this._data.next(data);
}
connect() {
const changes = [this._data, this.expansionModel.changed];
return merge(...changes).pipe(map(() => this._data.value));
}
disconnect() {
// do nothing for now
}
findParents(data, key, parents = []) {
const parent = Object.keys(data)
.filter(d => d !== key)
.find(d => data[d].includes(key));
if (!parent) {
return parents;
}
else {
return this.findParents(data, parent, [parent, ...parents]);
}
}
findChildren(data, key, children = []) {
const groupIds = Object.keys(data);
const child = (data[key] || []).filter((c) => groupIds.includes(c));
if (child && child.length > 0) {
return child.reduce((pre, cur) => Array.from(new Set([...pre, ...this.findChildren(data, cur, [...children, cur])])), children);
}
return children;
}
}
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Returns true if the data node is expanded. */\n  isExpanded(nodeName: string): boolean {\n    return this.expansionModel.isSelected(nodeName);\n  }\n\n  /** Collapse all dataNodes in the tree. */\n  collapseAll(): void {\n    this.expansionModel.clear();\n  }\n\n  expandAll(): void {\n    this.expansionModel.select(...Object.keys(this._data.value.compound || {}));\n  }\n\n  setData(data: NzGraphDataDef): void {\n    this.expansionModel?.clear();\n    this.dataSource = data;\n    this._data.next(data);\n  }\n\n  constructor(source?: NzGraphDataDef) {\n    if (source) {\n      this.expansionModel?.clear();\n      this.dataSource = source;\n      this._data.next(source);\n    }\n  }\n\n  connect(): Observable<NzGraphDataDef> {\n    const changes = [this._data, this.expansionModel.changed];\n    return merge(...changes).pipe(map(() => this._data.value));\n  }\n\n  disconnect(): void {\n    // do nothing for now\n  }\n\n  private findParents(data: NzSafeAny, key: string, parents: string[] = []): string[] {\n    const parent = Object.keys(data)\n      .filter(d => d !== key)\n      .find(d => data[d].includes(key));\n    if (!parent) {\n      return parents;\n    } else {\n      return this.findParents(data, parent, [parent, ...parents]);\n    }\n  }\n\n  private findChildren(data: NzSafeAny, key: string, children: string[] = []): string[] {\n    const groupIds = Object.keys(data);\n    const child = (data[key] || []).filter((c: string) => groupIds.includes(c));\n    if (child && child.length > 0) {\n      return child.reduce(\n        (pre: string[], cur: string) =>\n          Array.from(new Set([...pre, ...this.findChildren(data, cur, [...children, cur])])),\n        children\n      );\n    }\n    return children;\n  }\n}\n"]}