/** * @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 { FocusMonitor } from '@angular/cdk/a11y'; import { ENTER, hasModifierKey, SPACE } from '@angular/cdk/keycodes'; import { Attribute, ChangeDetectionStrategy, ChangeDetectorRef, Component, Directive, ElementRef, Host, Inject, Input, Optional, ViewEncapsulation, } from '@angular/core'; import { ANIMATION_MODULE_TYPE } from '@angular/platform-browser/animations'; import { mixinTabIndex } from '@angular/material/core'; import { EMPTY, merge, Subscription } from 'rxjs'; import { filter } from 'rxjs/operators'; import { matExpansionAnimations } from './expansion-animations'; import { MatExpansionPanel, MAT_EXPANSION_PANEL_DEFAULT_OPTIONS, } from './expansion-panel'; // Boilerplate for applying mixins to MatExpansionPanelHeader. /** @docs-private */ class MatExpansionPanelHeaderBase { } const _MatExpansionPanelHeaderMixinBase = mixinTabIndex(MatExpansionPanelHeaderBase); /** * Header element of a ``. */ export class MatExpansionPanelHeader extends _MatExpansionPanelHeaderMixinBase { constructor(panel, _element, _focusMonitor, _changeDetectorRef, defaultOptions, _animationMode, tabIndex) { super(); this.panel = panel; this._element = _element; this._focusMonitor = _focusMonitor; this._changeDetectorRef = _changeDetectorRef; this._animationMode = _animationMode; this._parentChangeSubscription = Subscription.EMPTY; const accordionHideToggleChange = panel.accordion ? panel.accordion._stateChanges.pipe(filter(changes => !!(changes['hideToggle'] || changes['togglePosition']))) : EMPTY; this.tabIndex = parseInt(tabIndex || '') || 0; // Since the toggle state depends on an @Input on the panel, we // need to subscribe and trigger change detection manually. this._parentChangeSubscription = merge(panel.opened, panel.closed, accordionHideToggleChange, panel._inputChanges.pipe(filter(changes => { return !!(changes['hideToggle'] || changes['disabled'] || changes['togglePosition']); }))) .subscribe(() => this._changeDetectorRef.markForCheck()); // Avoids focus being lost if the panel contained the focused element and was closed. panel.closed .pipe(filter(() => panel._containsFocus())) .subscribe(() => _focusMonitor.focusVia(_element, 'program')); if (defaultOptions) { this.expandedHeight = defaultOptions.expandedHeight; this.collapsedHeight = defaultOptions.collapsedHeight; } } /** * Whether the associated panel is disabled. Implemented as a part of `FocusableOption`. * @docs-private */ get disabled() { return this.panel.disabled; } /** Toggles the expanded state of the panel. */ _toggle() { if (!this.disabled) { this.panel.toggle(); } } /** Gets whether the panel is expanded. */ _isExpanded() { return this.panel.expanded; } /** Gets the expanded state string of the panel. */ _getExpandedState() { return this.panel._getExpandedState(); } /** Gets the panel id. */ _getPanelId() { return this.panel.id; } /** Gets the toggle position for the header. */ _getTogglePosition() { return this.panel.togglePosition; } /** Gets whether the expand indicator should be shown. */ _showToggle() { return !this.panel.hideToggle && !this.panel.disabled; } /** * Gets the current height of the header. Null if no custom height has been * specified, and if the default height from the stylesheet should be used. */ _getHeaderHeight() { const isExpanded = this._isExpanded(); if (isExpanded && this.expandedHeight) { return this.expandedHeight; } else if (!isExpanded && this.collapsedHeight) { return this.collapsedHeight; } return null; } /** Handle keydown event calling to toggle() if appropriate. */ _keydown(event) { switch (event.keyCode) { // Toggle for space and enter keys. case SPACE: case ENTER: if (!hasModifierKey(event)) { event.preventDefault(); this._toggle(); } break; default: if (this.panel.accordion) { this.panel.accordion._handleHeaderKeydown(event); } return; } } /** * Focuses the panel header. Implemented as a part of `FocusableOption`. * @param origin Origin of the action that triggered the focus. * @docs-private */ focus(origin, options) { if (origin) { this._focusMonitor.focusVia(this._element, origin, options); } else { this._element.nativeElement.focus(options); } } ngAfterViewInit() { this._focusMonitor.monitor(this._element).subscribe(origin => { if (origin && this.panel.accordion) { this.panel.accordion._handleHeaderFocus(this); } }); } ngOnDestroy() { this._parentChangeSubscription.unsubscribe(); this._focusMonitor.stopMonitoring(this._element); } } MatExpansionPanelHeader.decorators = [ { type: Component, args: [{ selector: 'mat-expansion-panel-header', template: "\n \n \n \n\n\n", encapsulation: ViewEncapsulation.None, changeDetection: ChangeDetectionStrategy.OnPush, inputs: ['tabIndex'], animations: [ matExpansionAnimations.indicatorRotate, ], host: { 'class': 'mat-expansion-panel-header mat-focus-indicator', 'role': 'button', '[attr.id]': 'panel._headerId', '[attr.tabindex]': 'tabIndex', '[attr.aria-controls]': '_getPanelId()', '[attr.aria-expanded]': '_isExpanded()', '[attr.aria-disabled]': 'panel.disabled', '[class.mat-expanded]': '_isExpanded()', '[class.mat-expansion-toggle-indicator-after]': `_getTogglePosition() === 'after'`, '[class.mat-expansion-toggle-indicator-before]': `_getTogglePosition() === 'before'`, '[class._mat-animation-noopable]': '_animationMode === "NoopAnimations"', '[style.height]': '_getHeaderHeight()', '(click)': '_toggle()', '(keydown)': '_keydown($event)', }, styles: [".mat-expansion-panel-header{display:flex;flex-direction:row;align-items:center;padding:0 24px;border-radius:inherit;transition:height 225ms cubic-bezier(0.4, 0, 0.2, 1)}.mat-expansion-panel-header._mat-animation-noopable{transition:none}.mat-expansion-panel-header:focus,.mat-expansion-panel-header:hover{outline:none}.mat-expansion-panel-header.mat-expanded:focus,.mat-expansion-panel-header.mat-expanded:hover{background:inherit}.mat-expansion-panel-header:not([aria-disabled=true]){cursor:pointer}.mat-expansion-panel-header.mat-expansion-toggle-indicator-before{flex-direction:row-reverse}.mat-expansion-panel-header.mat-expansion-toggle-indicator-before .mat-expansion-indicator{margin:0 16px 0 0}[dir=rtl] .mat-expansion-panel-header.mat-expansion-toggle-indicator-before .mat-expansion-indicator{margin:0 0 0 16px}.mat-content{display:flex;flex:1;flex-direction:row;overflow:hidden}.mat-expansion-panel-header-title,.mat-expansion-panel-header-description{display:flex;flex-grow:1;margin-right:16px}[dir=rtl] .mat-expansion-panel-header-title,[dir=rtl] .mat-expansion-panel-header-description{margin-right:0;margin-left:16px}.mat-expansion-panel-header-description{flex-grow:2}.mat-expansion-indicator::after{border-style:solid;border-width:0 2px 2px 0;content:\"\";display:inline-block;padding:3px;transform:rotate(45deg);vertical-align:middle}.cdk-high-contrast-active .mat-expansion-panel .mat-expansion-panel-header.cdk-keyboard-focused:not([aria-disabled=true])::before,.cdk-high-contrast-active .mat-expansion-panel .mat-expansion-panel-header.cdk-program-focused:not([aria-disabled=true])::before,.cdk-high-contrast-active .mat-expansion-panel:not(.mat-expanded) .mat-expansion-panel-header:hover:not([aria-disabled=true])::before{top:0;left:0;right:0;bottom:0;position:absolute;box-sizing:border-box;pointer-events:none;border:3px solid;border-radius:4px;content:\"\"}.cdk-high-contrast-active .mat-expansion-panel-content{border-top:1px solid;border-top-left-radius:0;border-top-right-radius:0}\n"] },] } ]; MatExpansionPanelHeader.ctorParameters = () => [ { type: MatExpansionPanel, decorators: [{ type: Host }] }, { type: ElementRef }, { type: FocusMonitor }, { type: ChangeDetectorRef }, { type: undefined, decorators: [{ type: Inject, args: [MAT_EXPANSION_PANEL_DEFAULT_OPTIONS,] }, { type: Optional }] }, { type: String, decorators: [{ type: Optional }, { type: Inject, args: [ANIMATION_MODULE_TYPE,] }] }, { type: String, decorators: [{ type: Attribute, args: ['tabindex',] }] } ]; MatExpansionPanelHeader.propDecorators = { expandedHeight: [{ type: Input }], collapsedHeight: [{ type: Input }] }; /** * Description element of a ``. */ export class MatExpansionPanelDescription { } MatExpansionPanelDescription.decorators = [ { type: Directive, args: [{ selector: 'mat-panel-description', host: { class: 'mat-expansion-panel-header-description' } },] } ]; /** * Title element of a ``. */ export class MatExpansionPanelTitle { } MatExpansionPanelTitle.decorators = [ { type: Directive, args: [{ selector: 'mat-panel-title', host: { class: 'mat-expansion-panel-header-title' } },] } ]; //# 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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 {FocusableOption, FocusMonitor, FocusOrigin} from '@angular/cdk/a11y';\nimport {ENTER, hasModifierKey, SPACE} from '@angular/cdk/keycodes';\nimport {\n  AfterViewInit,\n  Attribute,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  Directive,\n  ElementRef,\n  Host,\n  Inject,\n  Input,\n  OnDestroy,\n  Optional,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\nimport {HasTabIndex, mixinTabIndex} from '@angular/material/core';\nimport {NumberInput} from '@angular/cdk/coercion';\nimport {EMPTY, merge, Subscription} from 'rxjs';\nimport {filter} from 'rxjs/operators';\nimport {MatAccordionTogglePosition} from './accordion-base';\nimport {matExpansionAnimations} from './expansion-animations';\nimport {\n  MatExpansionPanel,\n  MatExpansionPanelDefaultOptions,\n  MAT_EXPANSION_PANEL_DEFAULT_OPTIONS,\n} from './expansion-panel';\n\n\n// Boilerplate for applying mixins to MatExpansionPanelHeader.\n/** @docs-private */\nabstract class MatExpansionPanelHeaderBase {\n  abstract readonly disabled: boolean;\n}\nconst _MatExpansionPanelHeaderMixinBase = mixinTabIndex(MatExpansionPanelHeaderBase);\n\n/**\n * Header element of a `<mat-expansion-panel>`.\n */\n@Component({\n  selector: 'mat-expansion-panel-header',\n  styleUrls: ['expansion-panel-header.css'],\n  templateUrl: 'expansion-panel-header.html',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  inputs: ['tabIndex'],\n  animations: [\n    matExpansionAnimations.indicatorRotate,\n  ],\n  host: {\n    'class': 'mat-expansion-panel-header mat-focus-indicator',\n    'role': 'button',\n    '[attr.id]': 'panel._headerId',\n    '[attr.tabindex]': 'tabIndex',\n    '[attr.aria-controls]': '_getPanelId()',\n    '[attr.aria-expanded]': '_isExpanded()',\n    '[attr.aria-disabled]': 'panel.disabled',\n    '[class.mat-expanded]': '_isExpanded()',\n    '[class.mat-expansion-toggle-indicator-after]': `_getTogglePosition() === 'after'`,\n    '[class.mat-expansion-toggle-indicator-before]': `_getTogglePosition() === 'before'`,\n    '[class._mat-animation-noopable]': '_animationMode === \"NoopAnimations\"',\n    '[style.height]': '_getHeaderHeight()',\n    '(click)': '_toggle()',\n    '(keydown)': '_keydown($event)',\n  },\n})\nexport class MatExpansionPanelHeader extends _MatExpansionPanelHeaderMixinBase implements\n  AfterViewInit, OnDestroy, FocusableOption, HasTabIndex {\n  private _parentChangeSubscription = Subscription.EMPTY;\n\n  constructor(\n      @Host() public panel: MatExpansionPanel,\n      private _element: ElementRef,\n      private _focusMonitor: FocusMonitor,\n      private _changeDetectorRef: ChangeDetectorRef,\n      @Inject(MAT_EXPANSION_PANEL_DEFAULT_OPTIONS) @Optional()\n          defaultOptions?: MatExpansionPanelDefaultOptions,\n      @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string,\n      @Attribute('tabindex') tabIndex?: string) {\n    super();\n    const accordionHideToggleChange = panel.accordion ?\n        panel.accordion._stateChanges.pipe(\n            filter(changes => !!(changes['hideToggle'] || changes['togglePosition']))) :\n        EMPTY;\n    this.tabIndex = parseInt(tabIndex || '') || 0;\n\n    // Since the toggle state depends on an @Input on the panel, we\n    // need to subscribe and trigger change detection manually.\n    this._parentChangeSubscription =\n        merge(\n            panel.opened, panel.closed, accordionHideToggleChange,\n            panel._inputChanges.pipe(filter(\n                changes => {\n                  return !!(\n                    changes['hideToggle'] ||\n                    changes['disabled'] ||\n                    changes['togglePosition']);\n                  })))\n    .subscribe(() => this._changeDetectorRef.markForCheck());\n\n    // Avoids focus being lost if the panel contained the focused element and was closed.\n    panel.closed\n      .pipe(filter(() => panel._containsFocus()))\n      .subscribe(() => _focusMonitor.focusVia(_element, 'program'));\n\n    if (defaultOptions) {\n      this.expandedHeight = defaultOptions.expandedHeight;\n      this.collapsedHeight = defaultOptions.collapsedHeight;\n    }\n  }\n\n  /** Height of the header while the panel is expanded. */\n  @Input() expandedHeight: string;\n\n  /** Height of the header while the panel is collapsed. */\n  @Input() collapsedHeight: string;\n\n  /**\n   * Whether the associated panel is disabled. Implemented as a part of `FocusableOption`.\n   * @docs-private\n   */\n  get disabled(): boolean {\n    return this.panel.disabled;\n  }\n\n  /** Toggles the expanded state of the panel. */\n  _toggle(): void {\n    if (!this.disabled) {\n      this.panel.toggle();\n    }\n  }\n\n  /** Gets whether the panel is expanded. */\n  _isExpanded(): boolean {\n    return this.panel.expanded;\n  }\n\n  /** Gets the expanded state string of the panel. */\n  _getExpandedState(): string {\n    return this.panel._getExpandedState();\n  }\n\n  /** Gets the panel id. */\n  _getPanelId(): string {\n    return this.panel.id;\n  }\n\n  /** Gets the toggle position for the header. */\n  _getTogglePosition(): MatAccordionTogglePosition {\n    return this.panel.togglePosition;\n  }\n\n  /** Gets whether the expand indicator should be shown. */\n  _showToggle(): boolean {\n    return !this.panel.hideToggle && !this.panel.disabled;\n  }\n\n  /**\n   * Gets the current height of the header. Null if no custom height has been\n   * specified, and if the default height from the stylesheet should be used.\n   */\n  _getHeaderHeight(): string|null {\n    const isExpanded = this._isExpanded();\n    if (isExpanded && this.expandedHeight) {\n      return this.expandedHeight;\n    } else if (!isExpanded && this.collapsedHeight) {\n      return this.collapsedHeight;\n    }\n    return null;\n  }\n\n  /** Handle keydown event calling to toggle() if appropriate. */\n  _keydown(event: KeyboardEvent) {\n    switch (event.keyCode) {\n      // Toggle for space and enter keys.\n      case SPACE:\n      case ENTER:\n        if (!hasModifierKey(event)) {\n          event.preventDefault();\n          this._toggle();\n        }\n\n        break;\n      default:\n        if (this.panel.accordion) {\n          this.panel.accordion._handleHeaderKeydown(event);\n        }\n\n        return;\n    }\n  }\n\n  /**\n   * Focuses the panel header. Implemented as a part of `FocusableOption`.\n   * @param origin Origin of the action that triggered the focus.\n   * @docs-private\n   */\n  focus(origin?: FocusOrigin, options?: FocusOptions) {\n    if (origin) {\n      this._focusMonitor.focusVia(this._element, origin, options);\n    } else {\n      this._element.nativeElement.focus(options);\n    }\n  }\n\n  ngAfterViewInit() {\n    this._focusMonitor.monitor(this._element).subscribe(origin => {\n      if (origin && this.panel.accordion) {\n        this.panel.accordion._handleHeaderFocus(this);\n      }\n    });\n  }\n\n  ngOnDestroy() {\n    this._parentChangeSubscription.unsubscribe();\n    this._focusMonitor.stopMonitoring(this._element);\n  }\n\n  static ngAcceptInputType_tabIndex: NumberInput;\n}\n\n/**\n * Description element of a `<mat-expansion-panel-header>`.\n */\n@Directive({\n  selector: 'mat-panel-description',\n  host: {\n    class: 'mat-expansion-panel-header-description'\n  }\n})\nexport class MatExpansionPanelDescription {}\n\n/**\n * Title element of a `<mat-expansion-panel-header>`.\n */\n@Directive({\n  selector: 'mat-panel-title',\n  host: {\n    class: 'mat-expansion-panel-header-title'\n  }\n})\nexport class MatExpansionPanelTitle {}\n"]}