@angular/cdk
Version:
Angular Material Component Development Kit
113 lines • 14.2 kB
JavaScript
import { __extends } from "tslib";
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { ContentChildren, Directive, ElementRef, IterableDiffers, QueryList, } from '@angular/core';
import { isObservable } from 'rxjs';
import { takeUntil } from 'rxjs/operators';
import { CDK_TREE_NODE_OUTLET_NODE, CdkTreeNodeOutlet } from './outlet';
import { CdkTree, CdkTreeNode } from './tree';
import { getTreeControlFunctionsMissingError } from './tree-errors';
/**
* Nested node is a child of `<cdk-tree>`. It works with nested tree.
* By using `cdk-nested-tree-node` component in tree node template, children of the parent node will
* be added in the `cdkTreeNodeOutlet` in tree node template.
* The children of node will be automatically added to `cdkTreeNodeOutlet`.
*/
var CdkNestedTreeNode = /** @class */ (function (_super) {
__extends(CdkNestedTreeNode, _super);
function CdkNestedTreeNode(_elementRef, _tree, _differs) {
var _this = _super.call(this, _elementRef, _tree) || this;
_this._elementRef = _elementRef;
_this._tree = _tree;
_this._differs = _differs;
return _this;
}
CdkNestedTreeNode.prototype.ngAfterContentInit = function () {
var _this = this;
this._dataDiffer = this._differs.find([]).create(this._tree.trackBy);
if (!this._tree.treeControl.getChildren) {
throw getTreeControlFunctionsMissingError();
}
var childrenNodes = this._tree.treeControl.getChildren(this.data);
if (Array.isArray(childrenNodes)) {
this.updateChildrenNodes(childrenNodes);
}
else if (isObservable(childrenNodes)) {
childrenNodes.pipe(takeUntil(this._destroyed))
.subscribe(function (result) { return _this.updateChildrenNodes(result); });
}
this.nodeOutlet.changes.pipe(takeUntil(this._destroyed))
.subscribe(function () { return _this.updateChildrenNodes(); });
};
CdkNestedTreeNode.prototype.ngOnDestroy = function () {
this._clear();
_super.prototype.ngOnDestroy.call(this);
};
/** Add children dataNodes to the NodeOutlet */
CdkNestedTreeNode.prototype.updateChildrenNodes = function (children) {
var outlet = this._getNodeOutlet();
if (children) {
this._children = children;
}
if (outlet && this._children) {
var viewContainer = outlet.viewContainer;
this._tree.renderNodeChanges(this._children, this._dataDiffer, viewContainer, this._data);
}
else {
// Reset the data differ if there's no children nodes displayed
this._dataDiffer.diff([]);
}
};
/** Clear the children dataNodes. */
CdkNestedTreeNode.prototype._clear = function () {
var outlet = this._getNodeOutlet();
if (outlet) {
outlet.viewContainer.clear();
this._dataDiffer.diff([]);
}
};
/** Gets the outlet for the current node. */
CdkNestedTreeNode.prototype._getNodeOutlet = function () {
var _this = this;
var outlets = this.nodeOutlet;
// Note that since we use `descendants: true` on the query, we have to ensure
// that we don't pick up the outlet of a child node by accident.
return outlets && outlets.find(function (outlet) { return !outlet._node || outlet._node === _this; });
};
CdkNestedTreeNode.decorators = [
{ type: Directive, args: [{
selector: 'cdk-nested-tree-node',
exportAs: 'cdkNestedTreeNode',
host: {
'[attr.aria-expanded]': 'isExpanded',
'[attr.role]': 'role',
'class': 'cdk-tree-node cdk-nested-tree-node',
},
providers: [
{ provide: CdkTreeNode, useExisting: CdkNestedTreeNode },
{ provide: CDK_TREE_NODE_OUTLET_NODE, useExisting: CdkNestedTreeNode }
]
},] }
];
/** @nocollapse */
CdkNestedTreeNode.ctorParameters = function () { return [
{ type: ElementRef },
{ type: CdkTree },
{ type: IterableDiffers }
]; };
CdkNestedTreeNode.propDecorators = {
nodeOutlet: [{ type: ContentChildren, args: [CdkTreeNodeOutlet, {
// We need to use `descendants: true`, because Ivy will no longer match
// indirect descendants if it's left as false.
descendants: true
},] }]
};
return CdkNestedTreeNode;
}(CdkTreeNode));
export { CdkNestedTreeNode };
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It works with nested tree.\n * By using `cdk-nested-tree-node` component in tree node template, children of the parent node will\n * be added in the `cdkTreeNodeOutlet` in tree node template.\n * The children of node will be automatically added to `cdkTreeNodeOutlet`.\n */\n@Directive({\n  selector: 'cdk-nested-tree-node',\n  exportAs: 'cdkNestedTreeNode',\n  host: {\n    '[attr.aria-expanded]': 'isExpanded',\n    '[attr.role]': 'role',\n    'class': 'cdk-tree-node cdk-nested-tree-node',\n  },\n  providers: [\n    {provide: CdkTreeNode, useExisting: CdkNestedTreeNode},\n    {provide: CDK_TREE_NODE_OUTLET_NODE, useExisting: CdkNestedTreeNode}\n  ]\n})\nexport class CdkNestedTreeNode<T> extends CdkTreeNode<T> implements AfterContentInit, OnDestroy {\n  /** Differ used to find the changes in the data provided by the data source. */\n  private _dataDiffer: IterableDiffer<T>;\n\n  /** The children data dataNodes of current node. They will be placed in `CdkTreeNodeOutlet`. */\n  protected _children: T[];\n\n  /** The children node placeholder. */\n  @ContentChildren(CdkTreeNodeOutlet, {\n    // We need to use `descendants: true`, because Ivy will no longer match\n    // indirect descendants if it's left as false.\n    descendants: true\n  })\n  nodeOutlet: QueryList<CdkTreeNodeOutlet>;\n\n  constructor(protected _elementRef: ElementRef<HTMLElement>,\n              protected _tree: CdkTree<T>,\n              protected _differs: IterableDiffers) {\n    super(_elementRef, _tree);\n  }\n\n  ngAfterContentInit() {\n    this._dataDiffer = this._differs.find([]).create(this._tree.trackBy);\n    if (!this._tree.treeControl.getChildren) {\n      throw getTreeControlFunctionsMissingError();\n    }\n    const childrenNodes = this._tree.treeControl.getChildren(this.data);\n    if (Array.isArray(childrenNodes)) {\n      this.updateChildrenNodes(childrenNodes as T[]);\n    } else if (isObservable(childrenNodes)) {\n      childrenNodes.pipe(takeUntil(this._destroyed))\n        .subscribe(result => this.updateChildrenNodes(result));\n    }\n    this.nodeOutlet.changes.pipe(takeUntil(this._destroyed))\n        .subscribe(() => this.updateChildrenNodes());\n  }\n\n  ngOnDestroy() {\n    this._clear();\n    super.ngOnDestroy();\n  }\n\n  /** Add children dataNodes to the NodeOutlet */\n  protected updateChildrenNodes(children?: T[]): void {\n    const outlet = this._getNodeOutlet();\n    if (children) {\n      this._children = children;\n    }\n    if (outlet && this._children) {\n      const viewContainer = outlet.viewContainer;\n      this._tree.renderNodeChanges(this._children, this._dataDiffer, viewContainer, this._data);\n    } else {\n      // Reset the data differ if there's no children nodes displayed\n      this._dataDiffer.diff([]);\n    }\n  }\n\n  /** Clear the children dataNodes. */\n  protected _clear(): void {\n    const outlet = this._getNodeOutlet();\n    if (outlet) {\n      outlet.viewContainer.clear();\n      this._dataDiffer.diff([]);\n    }\n  }\n\n  /** Gets the outlet for the current node. */\n  private _getNodeOutlet() {\n    const outlets = this.nodeOutlet;\n\n    // Note that since we use `descendants: true` on the query, we have to ensure\n    // that we don't pick up the outlet of a child node by accident.\n    return outlets && outlets.find(outlet => !outlet._node || outlet._node === this);\n  }\n}\n"]}