| {"version":3,"file":"collections.es5.js","sources":["../../../src/cdk/collections/unique-selection-dispatcher.ts","../../../src/cdk/collections/selection.ts","../../../src/cdk/collections/array-data-source.ts","../../../src/cdk/collections/data-source.ts"],"sourcesContent":["/**\n * @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 {Injectable, OnDestroy} from '@angular/core';\n\n\n// Users of the Dispatcher never need to see this type, but TypeScript requires it to be exported.\nexport type UniqueSelectionDispatcherListener = (id: string, name: string) => void;\n\n/**\n * Class to coordinate unique selection based on name.\n * Intended to be consumed as an Angular service.\n * This service is needed because native radio change events are only fired on the item currently\n * being selected, and we still need to uncheck the previous selection.\n *\n * This service does not *store* any IDs and names because they may change at any time, so it is\n * less error-prone if they are simply passed through when the events occur.\n */\n@Injectable({providedIn: 'root'})\nexport class UniqueSelectionDispatcher implements OnDestroy {\n private _listeners: UniqueSelectionDispatcherListener[] = [];\n\n /**\n * Notify other items that selection for the given name has been set.\n * @param id ID of the item.\n * @param name Name of the item.\n */\n notify(id: string, name: string) {\n for (let listener of this._listeners) {\n listener(id, name);\n }\n }\n\n /**\n * Listen for future changes to item selection.\n * @return Function used to deregister listener\n */\n listen(listener: UniqueSelectionDispatcherListener): () => void {\n this._listeners.push(listener);\n return () => {\n this._listeners = this._listeners.filter((registered: UniqueSelectionDispatcherListener) => {\n return listener !== registered;\n });\n };\n }\n\n ngOnDestroy() {\n this._listeners = [];\n }\n}\n","/**\n * @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 /**\n * Event emitted when the value has changed.\n * @deprecated Use `changed` instead.\n * @breaking-change 8.0.0 To be changed to `changed`\n */\n onChange: Subject<SelectionChange<T>> = this.changed;\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","/**\n * @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 {Observable, of as observableOf} from 'rxjs';\nimport {DataSource} from './data-source';\n\n\n/** DataSource wrapper for a native array. */\nexport class ArrayDataSource<T> extends DataSource<T> {\n constructor(private _data: T[] | ReadonlyArray<T> | Observable<T[] | ReadonlyArray<T>>) {\n super();\n }\n\n connect(): Observable<T[] | ReadonlyArray<T>> {\n return this._data instanceof Observable ? this._data : observableOf(this._data);\n }\n\n disconnect() {}\n}\n","/**\n * @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 {Observable} from 'rxjs';\nimport {CollectionViewer} from './collection-viewer';\n\nexport abstract class DataSource<T> {\n /**\n * Connects a collection viewer (such as a data-table) to this data source. Note that\n * the stream provided will be accessed during change detection and should not directly change\n * values that are bound in template views.\n * @param collectionViewer The component that exposes a view over the data provided by this\n * data source.\n * @returns Observable that emits a new value when the data changes.\n */\n abstract connect(collectionViewer: CollectionViewer): Observable<T[] | ReadonlyArray<T>>;\n\n /**\n * Disconnects a collection viewer (such as a data-table) from this data source. Can be used\n * to perform any clean-up or tear-down operations when a view is being destroyed.\n *\n * @param collectionViewer The component that exposes a view over the data provided by this\n * data source.\n */\n abstract disconnect(collectionViewer: CollectionViewer): void;\n}\n\n/** Checks whether an object is a data source. */\nexport function isDataSource(value: any): value is DataSource<any> {\n // Check if the value is a DataSource by observing if it has a connect function. Cannot\n // be checked as an `instanceof DataSource` since people could create their own sources\n // that match the interface, but don't extend DataSource.\n return value && typeof value.connect === 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