@progress/kendo-angular-dropdowns
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A wide variety of native Angular dropdown components including AutoComplete, ComboBox, DropDownList, DropDownTree, MultiColumnComboBox, MultiSelect, and MultiSelectTree
77 lines (76 loc) • 3.49 kB
JavaScript
/**-----------------------------------------------------------------------------------------
* Copyright © 2025 Progress Software Corporation. All rights reserved.
* Licensed under commercial license. See LICENSE.md in the project root for more information
*-------------------------------------------------------------------------------------------*/
import { Directive, Input } from '@angular/core';
import { getHierarchicalItemLevel, valueFrom } from '../../common/util';
import * as i0 from "@angular/core";
/**
* @hidden
*
* A directive which manages the in-memory checked state of the MultiSelectTree nodes.
*/
export class BaseCheckDirective {
/**
* @hidden
* The flag is needed in order to determine how to construct the items map keys.
* If `true`, then the key consists of the item's value and level (depth),
* else the key consists of the item's value and 0 (no leveling required)
*/
isHeterogeneous;
addItem(item) {
if (this.isItemChecked(item)) {
return;
}
const level = getHierarchicalItemLevel(item.index);
const key = this.getKey(item, level);
const candidate = { ...item, level, key };
this.checkedItems.push(candidate);
this.checkedKeys.add(key);
}
removeItem(item) {
if (!this.isItemChecked(item)) {
return;
}
const level = getHierarchicalItemLevel(item.index);
const key = this.getKey(item, level);
const candidate = { ...item, level, key };
this.checkedItems = this.checkedItems
.filter(item => {
const valueMatch = valueFrom(item, this.valueField) === valueFrom(candidate, this.valueField);
const levelMatch = item.level === candidate.level;
return this.isHeterogeneous ? !(valueMatch && levelMatch) : !valueMatch;
});
this.checkedKeys.delete(key);
}
isItemChecked(item) {
const level = item.index.split('_').length - 1;
item.level = level;
const key = this.getKey(item, level);
return this.checkedKeys.has(key);
}
updateItems() {
this.checkedItems = this.checkedItems || [];
this.checkedKeys = new Set(this.checkedItems.map(item => item.key));
}
/**
* Adds the item's depth to the item's value to allow duplicate values on different levels.
*
* @param item - The checked key.
* @returns { string } - A string key consisting of the item's `valueField` value and its depth (depth is 0 if data is homogeneous).
*/
getKey(item, level) {
return valueFrom(item, this.valueField) + '_' + (this.isHeterogeneous ? level : 0);
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: BaseCheckDirective, deps: [], target: i0.ɵɵFactoryTarget.Directive });
static ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.2.12", type: BaseCheckDirective, inputs: { valueField: "valueField", checkedItems: "checkedItems", isHeterogeneous: "isHeterogeneous" }, ngImport: i0 });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: BaseCheckDirective, decorators: [{
type: Directive
}], propDecorators: { valueField: [{
type: Input
}], checkedItems: [{
type: Input
}], isHeterogeneous: [{
type: Input
}] } });