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@angular/material

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import { CommonModule } from '@angular/common'; import { InjectionToken, Component, ViewEncapsulation, ChangeDetectionStrategy, ElementRef, Directive, ChangeDetectorRef, Optional, Inject, ContentChildren, ContentChild, Input, forwardRef, ViewChild, EventEmitter, Attribute, Output, NgModule } from '@angular/core'; import { mixinDisabled, mixinDisableRipple, setLines, MatLine, MatLineModule, MatRippleModule, MatCommonModule, MatPseudoCheckboxModule } from '@angular/material/core'; import { coerceBooleanProperty } from '@angular/cdk/coercion'; import { Subject } from 'rxjs'; import { takeUntil, startWith } from 'rxjs/operators'; import { FocusKeyManager, FocusMonitor } from '@angular/cdk/a11y'; import { SelectionModel } from '@angular/cdk/collections'; import { hasModifierKey, A, ENTER, SPACE, UP_ARROW, DOWN_ARROW } from '@angular/cdk/keycodes'; import { NG_VALUE_ACCESSOR } from '@angular/forms'; import { MatDividerModule } from '@angular/material/divider'; /** * @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 */ // Boilerplate for applying mixins to MatList. /** @docs-private */ class MatListBase { } const _MatListMixinBase = mixinDisabled(mixinDisableRipple(MatListBase)); // Boilerplate for applying mixins to MatListItem. /** @docs-private */ class MatListItemBase { } const _MatListItemMixinBase = mixinDisableRipple(MatListItemBase); /** * Injection token that can be used to inject instances of `MatList`. It serves as * alternative token to the actual `MatList` class which could cause unnecessary * retention of the class and its component metadata. */ const MAT_LIST = new InjectionToken('MatList'); /** * Injection token that can be used to inject instances of `MatNavList`. It serves as * alternative token to the actual `MatNavList` class which could cause unnecessary * retention of the class and its component metadata. */ const MAT_NAV_LIST = new InjectionToken('MatNavList'); class MatNavList extends _MatListMixinBase { constructor() { super(...arguments); /** Emits when the state of the list changes. */ this._stateChanges = new Subject(); } ngOnChanges() { this._stateChanges.next(); } ngOnDestroy() { this._stateChanges.complete(); } } MatNavList.decorators = [ { type: Component, args: [{ selector: 'mat-nav-list', exportAs: 'matNavList', host: { 'role': 'navigation', 'class': 'mat-nav-list mat-list-base' }, template: "<ng-content></ng-content>\n\n", inputs: ['disableRipple', 'disabled'], encapsulation: ViewEncapsulation.None, changeDetection: ChangeDetectionStrategy.OnPush, providers: [{ provide: MAT_NAV_LIST, useExisting: MatNavList }], styles: [".mat-subheader{display:flex;box-sizing:border-box;padding:16px;align-items:center}.mat-list-base .mat-subheader{margin:0}.mat-list-base{padding-top:8px;display:block;-webkit-tap-highlight-color:transparent}.mat-list-base .mat-subheader{height:48px;line-height:16px}.mat-list-base .mat-subheader:first-child{margin-top:-8px}.mat-list-base .mat-list-item,.mat-list-base .mat-list-option{display:block;height:48px;-webkit-tap-highlight-color:transparent;width:100%;padding:0}.mat-list-base .mat-list-item .mat-list-item-content,.mat-list-base .mat-list-option .mat-list-item-content{display:flex;flex-direction:row;align-items:center;box-sizing:border-box;padding:0 16px;position:relative;height:inherit}.mat-list-base .mat-list-item .mat-list-item-content-reverse,.mat-list-base .mat-list-option .mat-list-item-content-reverse{display:flex;align-items:center;padding:0 16px;flex-direction:row-reverse;justify-content:space-around}.mat-list-base .mat-list-item .mat-list-item-ripple,.mat-list-base .mat-list-option .mat-list-item-ripple{top:0;left:0;right:0;bottom:0;position:absolute;pointer-events:none}.mat-list-base .mat-list-item.mat-list-item-with-avatar,.mat-list-base .mat-list-option.mat-list-item-with-avatar{height:56px}.mat-list-base .mat-list-item.mat-2-line,.mat-list-base .mat-list-option.mat-2-line{height:72px}.mat-list-base .mat-list-item.mat-3-line,.mat-list-base .mat-list-option.mat-3-line{height:88px}.mat-list-base .mat-list-item.mat-multi-line,.mat-list-base .mat-list-option.mat-multi-line{height:auto}.mat-list-base .mat-list-item.mat-multi-line .mat-list-item-content,.mat-list-base .mat-list-option.mat-multi-line .mat-list-item-content{padding-top:16px;padding-bottom:16px}.mat-list-base .mat-list-item .mat-list-text,.mat-list-base .mat-list-option .mat-list-text{display:flex;flex-direction:column;flex:auto;box-sizing:border-box;overflow:hidden;padding:0}.mat-list-base .mat-list-item .mat-list-text>*,.mat-list-base .mat-list-option 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.mat-list-text{padding-right:16px;padding-left:0}.mat-list-base .mat-list-item.mat-list-item-with-avatar .mat-list-item-content-reverse .mat-list-text,.mat-list-base .mat-list-item.mat-list-option .mat-list-item-content-reverse .mat-list-text,.mat-list-base .mat-list-option.mat-list-item-with-avatar .mat-list-item-content-reverse .mat-list-text,.mat-list-base .mat-list-option.mat-list-option .mat-list-item-content-reverse .mat-list-text{padding-left:0;padding-right:16px}[dir=rtl] .mat-list-base .mat-list-item.mat-list-item-with-avatar .mat-list-item-content-reverse .mat-list-text,[dir=rtl] .mat-list-base .mat-list-item.mat-list-option .mat-list-item-content-reverse .mat-list-text,[dir=rtl] .mat-list-base .mat-list-option.mat-list-item-with-avatar .mat-list-item-content-reverse .mat-list-text,[dir=rtl] .mat-list-base .mat-list-option.mat-list-option .mat-list-item-content-reverse .mat-list-text{padding-right:0;padding-left:16px}.mat-list-base 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.mat-divider.mat-divider-inset{position:absolute}.mat-list-base[dense]{padding-top:4px;display:block}.mat-list-base[dense] .mat-subheader{height:40px;line-height:8px}.mat-list-base[dense] .mat-subheader:first-child{margin-top:-4px}.mat-list-base[dense] .mat-list-item,.mat-list-base[dense] .mat-list-option{display:block;height:40px;-webkit-tap-highlight-color:transparent;width:100%;padding:0}.mat-list-base[dense] .mat-list-item .mat-list-item-content,.mat-list-base[dense] .mat-list-option .mat-list-item-content{display:flex;flex-direction:row;align-items:center;box-sizing:border-box;padding:0 16px;position:relative;height:inherit}.mat-list-base[dense] .mat-list-item .mat-list-item-content-reverse,.mat-list-base[dense] .mat-list-option .mat-list-item-content-reverse{display:flex;align-items:center;padding:0 16px;flex-direction:row-reverse;justify-content:space-around}.mat-list-base[dense] .mat-list-item .mat-list-item-ripple,.mat-list-base[dense] .mat-list-option 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.mat-selection-list:focus{outline-style:dotted}.cdk-high-contrast-active .mat-list-option:hover,.cdk-high-contrast-active .mat-list-option:focus,.cdk-high-contrast-active .mat-nav-list .mat-list-item:hover,.cdk-high-contrast-active .mat-nav-list .mat-list-item:focus,.cdk-high-contrast-active mat-action-list .mat-list-item:hover,.cdk-high-contrast-active mat-action-list .mat-list-item:focus{outline:dotted 1px}.cdk-high-contrast-active .mat-list-single-selected-option::after{content:\"\";position:absolute;top:50%;right:16px;transform:translateY(-50%);width:10px;height:0;border-bottom:solid 10px;border-radius:10px}.cdk-high-contrast-active [dir=rtl] .mat-list-single-selected-option::after{right:auto;left:16px}@media(hover: none){.mat-list-option:not(.mat-list-single-selected-option):not(.mat-list-item-disabled):hover,.mat-nav-list .mat-list-item:not(.mat-list-item-disabled):hover,.mat-action-list .mat-list-item:not(.mat-list-item-disabled):hover{background:none}}\n"] },] } ]; class MatList extends _MatListMixinBase { constructor(_elementRef) { super(); this._elementRef = _elementRef; /** Emits when the state of the list changes. */ this._stateChanges = new Subject(); if (this._getListType() === 'action-list') { _elementRef.nativeElement.classList.add('mat-action-list'); } } _getListType() { const nodeName = this._elementRef.nativeElement.nodeName.toLowerCase(); if (nodeName === 'mat-list') { return 'list'; } if (nodeName === 'mat-action-list') { return 'action-list'; } return null; } ngOnChanges() { this._stateChanges.next(); } ngOnDestroy() { this._stateChanges.complete(); } } MatList.decorators = [ { type: Component, args: [{ selector: 'mat-list, mat-action-list', exportAs: 'matList', template: "<ng-content></ng-content>\n\n", host: { 'class': 'mat-list mat-list-base' }, inputs: ['disableRipple', 'disabled'], encapsulation: ViewEncapsulation.None, changeDetection: ChangeDetectionStrategy.OnPush, providers: [{ provide: MAT_LIST, useExisting: MatList }], styles: 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.mat-list-option .mat-list-item-ripple{top:0;left:0;right:0;bottom:0;position:absolute;pointer-events:none}.mat-list-base .mat-list-item.mat-list-item-with-avatar,.mat-list-base .mat-list-option.mat-list-item-with-avatar{height:56px}.mat-list-base .mat-list-item.mat-2-line,.mat-list-base .mat-list-option.mat-2-line{height:72px}.mat-list-base .mat-list-item.mat-3-line,.mat-list-base .mat-list-option.mat-3-line{height:88px}.mat-list-base .mat-list-item.mat-multi-line,.mat-list-base .mat-list-option.mat-multi-line{height:auto}.mat-list-base .mat-list-item.mat-multi-line .mat-list-item-content,.mat-list-base .mat-list-option.mat-multi-line .mat-list-item-content{padding-top:16px;padding-bottom:16px}.mat-list-base .mat-list-item .mat-list-text,.mat-list-base .mat-list-option .mat-list-text{display:flex;flex-direction:column;flex:auto;box-sizing:border-box;overflow:hidden;padding:0}.mat-list-base .mat-list-item .mat-list-text>*,.mat-list-base .mat-list-option 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.mat-selection-list:focus{outline-style:dotted}.cdk-high-contrast-active .mat-list-option:hover,.cdk-high-contrast-active .mat-list-option:focus,.cdk-high-contrast-active .mat-nav-list .mat-list-item:hover,.cdk-high-contrast-active .mat-nav-list .mat-list-item:focus,.cdk-high-contrast-active mat-action-list .mat-list-item:hover,.cdk-high-contrast-active mat-action-list .mat-list-item:focus{outline:dotted 1px}.cdk-high-contrast-active .mat-list-single-selected-option::after{content:\"\";position:absolute;top:50%;right:16px;transform:translateY(-50%);width:10px;height:0;border-bottom:solid 10px;border-radius:10px}.cdk-high-contrast-active [dir=rtl] .mat-list-single-selected-option::after{right:auto;left:16px}@media(hover: none){.mat-list-option:not(.mat-list-single-selected-option):not(.mat-list-item-disabled):hover,.mat-nav-list .mat-list-item:not(.mat-list-item-disabled):hover,.mat-action-list .mat-list-item:not(.mat-list-item-disabled):hover{background:none}}\n"] },] } ]; MatList.ctorParameters = () => [ { type: ElementRef } ]; /** * Directive whose purpose is to add the mat- CSS styling to this selector. * @docs-private */ class MatListAvatarCssMatStyler { } MatListAvatarCssMatStyler.decorators = [ { type: Directive, args: [{ selector: '[mat-list-avatar], [matListAvatar]', host: { 'class': 'mat-list-avatar' } },] } ]; /** * Directive whose purpose is to add the mat- CSS styling to this selector. * @docs-private */ class MatListIconCssMatStyler { } MatListIconCssMatStyler.decorators = [ { type: Directive, args: [{ selector: '[mat-list-icon], [matListIcon]', host: { 'class': 'mat-list-icon' } },] } ]; /** * Directive whose purpose is to add the mat- CSS styling to this selector. * @docs-private */ class MatListSubheaderCssMatStyler { } MatListSubheaderCssMatStyler.decorators = [ { type: Directive, args: [{ selector: '[mat-subheader], [matSubheader]', host: { 'class': 'mat-subheader' } },] } ]; /** An item within a Material Design list. */ class MatListItem extends _MatListItemMixinBase { constructor(_element, _changeDetectorRef, navList, list) { super(); this._element = _element; this._isInteractiveList = false; this._destroyed = new Subject(); this._disabled = false; this._isInteractiveList = !!(navList || (list && list._getListType() === 'action-list')); this._list = navList || list; // If no type attribute is specified for <button>, set it to "button". // If a type attribute is already specified, do nothing. const element = this._getHostElement(); if (element.nodeName.toLowerCase() === 'button' && !element.hasAttribute('type')) { element.setAttribute('type', 'button'); } if (this._list) { // React to changes in the state of the parent list since // some of the item's properties depend on it (e.g. `disableRipple`). this._list._stateChanges.pipe(takeUntil(this._destroyed)).subscribe(() => { _changeDetectorRef.markForCheck(); }); } } /** Whether the option is disabled. */ get disabled() { return this._disabled || !!(this._list && this._list.disabled); } set disabled(value) { this._disabled = coerceBooleanProperty(value); } ngAfterContentInit() { setLines(this._lines, this._element); } ngOnDestroy() { this._destroyed.next(); this._destroyed.complete(); } /** Whether this list item should show a ripple effect when clicked. */ _isRippleDisabled() { return !this._isInteractiveList || this.disableRipple || !!(this._list && this._list.disableRipple); } /** Retrieves the DOM element of the component host. */ _getHostElement() { return this._element.nativeElement; } } MatListItem.decorators = [ { type: Component, args: [{ selector: 'mat-list-item, a[mat-list-item], button[mat-list-item]', exportAs: 'matListItem', host: { 'class': 'mat-list-item mat-focus-indicator', '[class.mat-list-item-disabled]': 'disabled', // @breaking-change 8.0.0 Remove `mat-list-item-avatar` in favor of `mat-list-item-with-avatar`. '[class.mat-list-item-avatar]': '_avatar || _icon', '[class.mat-list-item-with-avatar]': '_avatar || _icon', }, inputs: ['disableRipple'], template: "<div class=\"mat-list-item-content\">\n <div class=\"mat-list-item-ripple\" mat-ripple\n [matRippleTrigger]=\"_getHostElement()\"\n [matRippleDisabled]=\"_isRippleDisabled()\">\n </div>\n\n <ng-content select=\"[mat-list-avatar], [mat-list-icon], [matListAvatar], [matListIcon]\">\n </ng-content>\n\n <div class=\"mat-list-text\"><ng-content select=\"[mat-line], [matLine]\"></ng-content></div>\n\n <ng-content></ng-content>\n</div>\n", encapsulation: ViewEncapsulation.None, changeDetection: ChangeDetectionStrategy.OnPush },] } ]; MatListItem.ctorParameters = () => [ { type: ElementRef }, { type: ChangeDetectorRef }, { type: MatNavList, decorators: [{ type: Optional }, { type: Inject, args: [MAT_NAV_LIST,] }] }, { type: MatList, decorators: [{ type: Optional }, { type: Inject, args: [MAT_LIST,] }] } ]; MatListItem.propDecorators = { _lines: [{ type: ContentChildren, args: [MatLine, { descendants: true },] }], _avatar: [{ type: ContentChild, args: [MatListAvatarCssMatStyler,] }], _icon: [{ type: ContentChild, args: [MatListIconCssMatStyler,] }], disabled: [{ type: Input }] }; /** * @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 */ class MatSelectionListBase { } const _MatSelectionListMixinBase = mixinDisableRipple(MatSelectionListBase); class MatListOptionBase { } const _MatListOptionMixinBase = mixinDisableRipple(MatListOptionBase); /** @docs-private */ const MAT_SELECTION_LIST_VALUE_ACCESSOR = { provide: NG_VALUE_ACCESSOR, useExisting: forwardRef(() => MatSelectionList), multi: true }; /** Change event that is being fired whenever the selected state of an option changes. */ class MatSelectionListChange { constructor( /** Reference to the selection list that emitted the event. */ source, /** * Reference to the option that has been changed. * @deprecated Use `options` instead, because some events may change more than one option. * @breaking-change 12.0.0 */ option, /** Reference to the options that have been changed. */ options) { this.source = source; this.option = option; this.options = options; } } /** * Component for list-options of selection-list. Each list-option can automatically * generate a checkbox and can put current item into the selectionModel of selection-list * if the current item is selected. */ class MatListOption extends _MatListOptionMixinBase { constructor(_element, _changeDetector, /** @docs-private */ selectionList) { super(); this._element = _element; this._changeDetector = _changeDetector; this.selectionList = selectionList; this._selected = false; this._disabled = false; this._hasFocus = false; /** Whether the label should appear before or after the checkbox. Defaults to 'after' */ this.checkboxPosition = 'after'; /** * This is set to true after the first OnChanges cycle so we don't clear the value of `selected` * in the first cycle. */ this._inputsInitialized = false; } /** Theme color of the list option. This sets the color of the checkbox. */ get color() { return this._color || this.selectionList.color; } set color(newValue) { this._color = newValue; } /** Value of the option */ get value() { return this._value; } set value(newValue) { if (this.selected && !this.selectionList.compareWith(newValue, this.value) && this._inputsInitialized) { this.selected = false; } this._value = newValue; } /** Whether the option is disabled. */ get disabled() { return this._disabled || (this.selectionList && this.selectionList.disabled); } set disabled(value) { const newValue = coerceBooleanProperty(value); if (newValue !== this._disabled) { this._disabled = newValue; this._changeDetector.markForCheck(); } } /** Whether the option is selected. */ get selected() { return this.selectionList.selectedOptions.isSelected(this); } set selected(value) { const isSelected = coerceBooleanProperty(value); if (isSelected !== this._selected) { this._setSelected(isSelected); this.selectionList._reportValueChange(); } } ngOnInit() { const list = this.selectionList; if (list._value && list._value.some(value => list.compareWith(value, this._value))) { this._setSelected(true); } const wasSelected = this._selected; // List options that are selected at initialization can't be reported properly to the form // control. This is because it takes some time until the selection-list knows about all // available options. Also it can happen that the ControlValueAccessor has an initial value // that should be used instead. Deferring the value change report to the next tick ensures // that the form control value is not being overwritten. Promise.resolve().then(() => { if (this._selected || wasSelected) { this.selected = true; this._changeDetector.markForCheck(); } }); this._inputsInitialized = true; } ngAfterContentInit() { setLines(this._lines, this._element); } ngOnDestroy() { if (this.selected) { // We have to delay this until the next tick in order // to avoid changed after checked errors. Promise.resolve().then(() => { this.selected = false; }); } const hadFocus = this._hasFocus; const newActiveItem = this.selectionList._removeOptionFromList(this); // Only move focus if this option was focused at the time it was destroyed. if (hadFocus && newActiveItem) { newActiveItem.focus(); } } /** Toggles the selection state of the option. */ toggle() { this.selected = !this.selected; } /** Allows for programmatic focusing of the option. */ focus() { this._element.nativeElement.focus(); } /** * Returns the list item's text label. Implemented as a part of the FocusKeyManager. * @docs-private */ getLabel() { return this._text ? (this._text.nativeElement.textContent || '') : ''; } /** Whether this list item should show a ripple effect when clicked. */ _isRippleDisabled() { return this.disabled || this.disableRipple || this.selectionList.disableRipple; } _handleClick() { if (!this.disabled && (this.selectionList.multiple || !this.selected)) { this.toggle(); // Emit a change event if the selected state of the option changed through user interaction. this.selectionList._emitChangeEvent([this]); } } _handleFocus() { this.selectionList._setFocusedOption(this); this._hasFocus = true; } _handleBlur() { this.selectionList._onTouched(); this._hasFocus = false; } /** Retrieves the DOM element of the component host. */ _getHostElement() { return this._element.nativeElement; } /** Sets the selected state of the option. Returns whether the value has changed. */ _setSelected(selected) { if (selected === this._selected) { return false; } this._selected = selected; if (selected) { this.selectionList.selectedOptions.select(this); } else { this.selectionList.selectedOptions.deselect(this); } this._changeDetector.markForCheck(); return true; } /** * Notifies Angular that the option needs to be checked in the next change detection run. Mainly * used to trigger an update of the list option if the disabled state of the selection list * changed. */ _markForCheck() { this._changeDetector.markForCheck(); } } MatListOption.decorators = [ { type: Component, args: [{ selector: 'mat-list-option', exportAs: 'matListOption', inputs: ['disableRipple'], host: { 'role': 'option', 'class': 'mat-list-item mat-list-option mat-focus-indicator', '(focus)': '_handleFocus()', '(blur)': '_handleBlur()', '(click)': '_handleClick()', '[class.mat-list-item-disabled]': 'disabled', '[class.mat-list-item-with-avatar]': '_avatar || _icon', // Manually set the "primary" or "warn" class if the color has been explicitly // set to "primary" or "warn". The pseudo checkbox picks up these classes for // its theme. '[class.mat-primary]': 'color === "primary"', // Even though accent is the default, we need to set this class anyway, because the list might // be placed inside a parent that has one of the other colors with a higher specificity. '[class.mat-accent]': 'color !== "primary" && color !== "warn"', '[class.mat-warn]': 'color === "warn"', '[class.mat-list-single-selected-option]': 'selected && !selectionList.multiple', '[attr.aria-selected]': 'selected', '[attr.aria-disabled]': 'disabled', '[attr.tabindex]': '-1', }, template: "<div class=\"mat-list-item-content\"\n [class.mat-list-item-content-reverse]=\"checkboxPosition == 'after'\">\n\n <div mat-ripple\n class=\"mat-list-item-ripple\"\n [matRippleTrigger]=\"_getHostElement()\"\n [matRippleDisabled]=\"_isRippleDisabled()\"></div>\n\n <mat-pseudo-checkbox\n *ngIf=\"selectionList.multiple\"\n [state]=\"selected ? 'checked' : 'unchecked'\"\n [disabled]=\"disabled\"></mat-pseudo-checkbox>\n\n <div class=\"mat-list-text\" #text><ng-content></ng-content></div>\n\n <ng-content select=\"[mat-list-avatar], [mat-list-icon], [matListAvatar], [matListIcon]\">\n </ng-content>\n\n</div>\n", encapsulation: ViewEncapsulation.None, changeDetection: ChangeDetectionStrategy.OnPush },] } ]; MatListOption.ctorParameters = () => [ { type: ElementRef }, { type: ChangeDetectorRef }, { type: MatSelectionList, decorators: [{ type: Inject, args: [forwardRef(() => MatSelectionList),] }] } ]; MatListOption.propDecorators = { _avatar: [{ type: ContentChild, args: [MatListAvatarCssMatStyler,] }], _icon: [{ type: ContentChild, args: [MatListIconCssMatStyler,] }], _lines: [{ type: ContentChildren, args: [MatLine, { descendants: true },] }], _text: [{ type: ViewChild, args: ['text',] }], checkboxPosition: [{ type: Input }], color: [{ type: Input }], value: [{ type: Input }], disabled: [{ type: Input }], selected: [{ type: Input }] }; /** * Material Design list component where each item is a selectable option. Behaves as a listbox. */ class MatSelectionList extends _MatSelectionListMixinBase { constructor(_element, // @breaking-change 11.0.0 Remove `tabIndex` parameter. tabIndex, _changeDetector, // @breaking-change 11.0.0 `_focusMonitor` parameter to become required. _focusMonitor) { super(); this._element = _element; this._changeDetector = _changeDetector; this._focusMonitor = _focusMonitor; this._multiple = true; this._contentInitialized = false; /** Emits a change event whenever the selected state of an option changes. */ this.selectionChange = new EventEmitter(); /** * Tabindex of the selection list. * @breaking-change 11.0.0 Remove `tabIndex` input. */ this.tabIndex = 0; /** Theme color of the selection list. This sets the checkbox color for all list options. */ this.color = 'accent'; /** * Function used for comparing an option against the selected value when determining which * options should appear as selected. The first argument is the value of an options. The second * one is a value from the selected value. A boolean must be returned. */ this.compareWith = (a1, a2) => a1 === a2; this._disabled = false; /** The currently selected options. */ this.selectedOptions = new SelectionModel(this._multiple); /** The tabindex of the selection list. */ this._tabIndex = -1; /** View to model callback that should be called whenever the selected options change. */ this._onChange = (_) => { }; /** Emits when the list has been destroyed. */ this._destroyed = new Subject(); /** View to model callback that should be called if the list or its options lost focus. */ this._onTouched = () => { }; } /** Whether the selection list is disabled. */ get disabled() { return this._disabled; } set disabled(value) { this._disabled = coerceBooleanProperty(value); // The `MatSelectionList` and `MatListOption` are using the `OnPush` change detection // strategy. Therefore the options will not check for any changes if the `MatSelectionList` // changed its state. Since we know that a change to `disabled` property of the list affects // the state of the options, we manually mark each option for check. this._markOptionsForCheck(); } /** Whether selection is limited to one or multiple items (default multiple). */ get multiple() { return this._multiple; } set multiple(value) { const newValue = coerceBooleanProperty(value); if (newValue !== this._multiple) { if (this._contentInitialized && (typeof ngDevMode === 'undefined' || ngDevMode)) { throw new Error('Cannot change `multiple` mode of mat-selection-list after initialization.'); } this._multiple = newValue;