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/** * @fileoverview added by tsickle * Generated from: src/cdk/collections/selection-model.ts * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc */ /** * @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 { Subject } from 'rxjs'; /** * Class to be used to power selecting one or more options from a list. * @template T */ export class SelectionModel { /** * @param {?=} _multiple * @param {?=} initiallySelectedValues * @param {?=} _emitChanges */ constructor(_multiple = false, initiallySelectedValues, _emitChanges = true) { this._multiple = _multiple; this._emitChanges = _emitChanges; /** * Currently-selected values. */ this._selection = new Set(); /** * Keeps track of the deselected options that haven't been emitted by the change event. */ this._deselectedToEmit = []; /** * Keeps track of the selected options that haven't been emitted by the change event. */ this._selectedToEmit = []; /** * Event emitted when the value has changed. */ this.changed = new Subject(); if (initiallySelectedValues && initiallySelectedValues.length) { if (_multiple) { initiallySelectedValues.forEach((/** * @param {?} value * @return {?} */ value => this._markSelected(value))); } else { this._markSelected(initiallySelectedValues[0]); } // Clear the array in order to avoid firing the change event for preselected values. this._selectedToEmit.length = 0; } } /** * Selected values. * @return {?} */ get selected() { if (!this._selected) { this._selected = Array.from(this._selection.values()); } return this._selected; } /** * Selects a value or an array of values. * @param {...?} values * @return {?} */ select(...values) { this._verifyValueAssignment(values); values.forEach((/** * @param {?} value * @return {?} */ value => this._markSelected(value))); this._emitChangeEvent(); } /** * Deselects a value or an array of values. * @param {...?} values * @return {?} */ deselect(...values) { this._verifyValueAssignment(values); values.forEach((/** * @param {?} value * @return {?} */ value => this._unmarkSelected(value))); this._emitChangeEvent(); } /** * Toggles a value between selected and deselected. * @param {?} value * @return {?} */ toggle(value) { this.isSelected(value) ? this.deselect(value) : this.select(value); } /** * Clears all of the selected values. * @return {?} */ clear() { this._unmarkAll(); this._emitChangeEvent(); } /** * Determines whether a value is selected. * @param {?} value * @return {?} */ isSelected(value) { return this._selection.has(value); } /** * Determines whether the model does not have a value. * @return {?} */ isEmpty() { return this._selection.size === 0; } /** * Determines whether the model has a value. * @return {?} */ hasValue() { return !this.isEmpty(); } /** * Sorts the selected values based on a predicate function. * @param {?=} predicate * @return {?} */ sort(predicate) { if (this._multiple && this.selected) { (/** @type {?} */ (this._selected)).sort(predicate); } } /** * Gets whether multiple values can be selected. * @return {?} */ isMultipleSelection() { return this._multiple; } /** * Emits a change event and clears the records of selected and deselected values. * @private * @return {?} */ _emitChangeEvent() { // Clear the selected values so they can be re-cached. this._selected = null; if (this._selectedToEmit.length || this._deselectedToEmit.length) { this.changed.next({ source: this, added: this._selectedToEmit, removed: this._deselectedToEmit }); this._deselectedToEmit = []; this._selectedToEmit = []; } } /** * Selects a value. * @private * @param {?} value * @return {?} */ _markSelected(value) { if (!this.isSelected(value)) { if (!this._multiple) { this._unmarkAll(); } this._selection.add(value); if (this._emitChanges) { this._selectedToEmit.push(value); } } } /** * Deselects a value. * @private * @param {?} value * @return {?} */ _unmarkSelected(value) { if (this.isSelected(value)) { this._selection.delete(value); if (this._emitChanges) { this._deselectedToEmit.push(value); } } } /** * Clears out the selected values. * @private * @return {?} */ _unmarkAll() { if (!this.isEmpty()) { this._selection.forEach((/** * @param {?} value * @return {?} */ value => this._unmarkSelected(value))); } } /** * Verifies the value assignment and throws an error if the specified value array is * including multiple values while the selection model is not supporting multiple values. * @private * @param {?} values * @return {?} */ _verifyValueAssignment(values) { if (values.length > 1 && !this._multiple) { throw getMultipleValuesInSingleSelectionError(); } } } if (false) { /** * Currently-selected values. * @type {?} * @private */ SelectionModel.prototype._selection; /** * Keeps track of the deselected options that haven't been emitted by the change event. * @type {?} * @private */ SelectionModel.prototype._deselectedToEmit; /** * Keeps track of the selected options that haven't been emitted by the change event. * @type {?} * @private */ SelectionModel.prototype._selectedToEmit; /** * Cache for the array value of the selected items. * @type {?} * @private */ SelectionModel.prototype._selected; /** * Event emitted when the value has changed. * @type {?} */ SelectionModel.prototype.changed; /** * @type {?} * @private */ SelectionModel.prototype._multiple; /** * @type {?} * @private */ SelectionModel.prototype._emitChanges; } /** * Event emitted when the value of a MatSelectionModel has changed. * \@docs-private * @record * @template T */ export function SelectionChange() { } if (false) { /** * Model that dispatched the event. * @type {?} */ SelectionChange.prototype.source; /** * Options that were added to the model. * @type {?} */ SelectionChange.prototype.added; /** * Options that were removed from the model. * @type {?} */ SelectionChange.prototype.removed; } /** * Returns an error that reports that multiple values are passed into a selection model * with a single value. * \@docs-private * @return {?} */ export function getMultipleValuesInSingleSelectionError() { return Error('Cannot pass multiple values into SelectionModel with single-value mode.'); } //# 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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Subject} from 'rxjs';\n\n/**\n * Class to be used to power selecting one or more options from a list.\n */\nexport class SelectionModel<T> {\n  /** Currently-selected values. */\n  private _selection = new Set<T>();\n\n  /** Keeps track of the deselected options that haven't been emitted by the change event. */\n  private _deselectedToEmit: T[] = [];\n\n  /** Keeps track of the selected options that haven't been emitted by the change event. */\n  private _selectedToEmit: T[] = [];\n\n  /** Cache for the array value of the selected items. */\n  private _selected: T[] | null;\n\n  /** Selected values. */\n  get selected(): T[] {\n    if (!this._selected) {\n      this._selected = Array.from(this._selection.values());\n    }\n\n    return this._selected;\n  }\n\n  /** Event emitted when the value has changed. */\n  changed: Subject<SelectionChange<T>> = new Subject();\n\n  constructor(\n    private _multiple = false,\n    initiallySelectedValues?: T[],\n    private _emitChanges = true) {\n\n    if (initiallySelectedValues && initiallySelectedValues.length) {\n      if (_multiple) {\n        initiallySelectedValues.forEach(value => this._markSelected(value));\n      } else {\n        this._markSelected(initiallySelectedValues[0]);\n      }\n\n      // Clear the array in order to avoid firing the change event for preselected values.\n      this._selectedToEmit.length = 0;\n    }\n  }\n\n  /**\n   * Selects a value or an array of values.\n   */\n  select(...values: T[]): void {\n    this._verifyValueAssignment(values);\n    values.forEach(value => this._markSelected(value));\n    this._emitChangeEvent();\n  }\n\n  /**\n   * Deselects a value or an array of values.\n   */\n  deselect(...values: T[]): void {\n    this._verifyValueAssignment(values);\n    values.forEach(value => this._unmarkSelected(value));\n    this._emitChangeEvent();\n  }\n\n  /**\n   * Toggles a value between selected and deselected.\n   */\n  toggle(value: T): void {\n    this.isSelected(value) ? this.deselect(value) : this.select(value);\n  }\n\n  /**\n   * Clears all of the selected values.\n   */\n  clear(): void {\n    this._unmarkAll();\n    this._emitChangeEvent();\n  }\n\n  /**\n   * Determines whether a value is selected.\n   */\n  isSelected(value: T): boolean {\n    return this._selection.has(value);\n  }\n\n  /**\n   * Determines whether the model does not have a value.\n   */\n  isEmpty(): boolean {\n    return this._selection.size === 0;\n  }\n\n  /**\n   * Determines whether the model has a value.\n   */\n  hasValue(): boolean {\n    return !this.isEmpty();\n  }\n\n  /**\n   * Sorts the selected values based on a predicate function.\n   */\n  sort(predicate?: (a: T, b: T) => number): void {\n    if (this._multiple && this.selected) {\n      this._selected!.sort(predicate);\n    }\n  }\n\n  /**\n   * Gets whether multiple values can be selected.\n   */\n  isMultipleSelection() {\n    return this._multiple;\n  }\n\n  /** Emits a change event and clears the records of selected and deselected values. */\n  private _emitChangeEvent() {\n    // Clear the selected values so they can be re-cached.\n    this._selected = null;\n\n    if (this._selectedToEmit.length || this._deselectedToEmit.length) {\n      this.changed.next({\n        source: this,\n        added: this._selectedToEmit,\n        removed: this._deselectedToEmit\n      });\n\n      this._deselectedToEmit = [];\n      this._selectedToEmit = [];\n    }\n  }\n\n  /** Selects a value. */\n  private _markSelected(value: T) {\n    if (!this.isSelected(value)) {\n      if (!this._multiple) {\n        this._unmarkAll();\n      }\n\n      this._selection.add(value);\n\n      if (this._emitChanges) {\n        this._selectedToEmit.push(value);\n      }\n    }\n  }\n\n  /** Deselects a value. */\n  private _unmarkSelected(value: T) {\n    if (this.isSelected(value)) {\n      this._selection.delete(value);\n\n      if (this._emitChanges) {\n        this._deselectedToEmit.push(value);\n      }\n    }\n  }\n\n  /** Clears out the selected values. */\n  private _unmarkAll() {\n    if (!this.isEmpty()) {\n      this._selection.forEach(value => this._unmarkSelected(value));\n    }\n  }\n\n  /**\n   * Verifies the value assignment and throws an error if the specified value array is\n   * including multiple values while the selection model is not supporting multiple values.\n   */\n  private _verifyValueAssignment(values: T[]) {\n    if (values.length > 1 && !this._multiple) {\n      throw getMultipleValuesInSingleSelectionError();\n    }\n  }\n}\n\n/**\n * Event emitted when the value of a MatSelectionModel has changed.\n * @docs-private\n */\nexport interface SelectionChange<T> {\n  /** Model that dispatched the event. */\n  source: SelectionModel<T>;\n  /** Options that were added to the model. */\n  added: T[];\n  /** Options that were removed from the model. */\n  removed: T[];\n}\n\n/**\n * Returns an error that reports that multiple values are passed into a selection model\n * with a single value.\n * @docs-private\n */\nexport function getMultipleValuesInSingleSelectionError() {\n  return Error('Cannot pass multiple values into SelectionModel with single-value mode.');\n}\n"]}