@angular/material
Version:
Angular Material
223 lines • 30.7 kB
JavaScript
/**
* @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 { Component, ElementRef, EventEmitter, Inject, Optional, ChangeDetectorRef, ViewChild, ViewEncapsulation, ChangeDetectionStrategy, } from '@angular/core';
import { DOCUMENT } from '@angular/common';
import { matDialogAnimations } from './dialog-animations';
import { BasePortalOutlet, CdkPortalOutlet } from '@angular/cdk/portal';
import { FocusMonitor, FocusTrapFactory } from '@angular/cdk/a11y';
import { MatDialogConfig } from './dialog-config';
/**
* Throws an exception for the case when a ComponentPortal is
* attached to a DomPortalOutlet without an origin.
* @docs-private
*/
export function throwMatDialogContentAlreadyAttachedError() {
throw Error('Attempting to attach dialog content after content is already attached');
}
/**
* Internal component that wraps user-provided dialog content.
* Animation is based on https://material.io/guidelines/motion/choreography.html.
* @docs-private
*/
export class MatDialogContainer extends BasePortalOutlet {
constructor(_elementRef, _focusTrapFactory, _changeDetectorRef, _document,
/** The dialog configuration. */
_config, _focusMonitor) {
super();
this._elementRef = _elementRef;
this._focusTrapFactory = _focusTrapFactory;
this._changeDetectorRef = _changeDetectorRef;
this._config = _config;
this._focusMonitor = _focusMonitor;
/** Element that was focused before the dialog was opened. Save this to restore upon close. */
this._elementFocusedBeforeDialogWasOpened = null;
/**
* Type of interaction that led to the dialog being closed. This is used to determine
* whether the focus style will be applied when returning focus to its original location
* after the dialog is closed.
*/
this._closeInteractionType = null;
/** State of the dialog animation. */
this._state = 'enter';
/** Emits when an animation state changes. */
this._animationStateChanged = new EventEmitter();
/**
* Attaches a DOM portal to the dialog container.
* @param portal Portal to be attached.
* @deprecated To be turned into a method.
* @breaking-change 10.0.0
*/
this.attachDomPortal = (portal) => {
if (this._portalOutlet.hasAttached()) {
throwMatDialogContentAlreadyAttachedError();
}
this._setupFocusTrap();
return this._portalOutlet.attachDomPortal(portal);
};
this._ariaLabelledBy = _config.ariaLabelledBy || null;
this._document = _document;
}
/**
* Attach a ComponentPortal as content to this dialog container.
* @param portal Portal to be attached as the dialog content.
*/
attachComponentPortal(portal) {
if (this._portalOutlet.hasAttached()) {
throwMatDialogContentAlreadyAttachedError();
}
this._setupFocusTrap();
return this._portalOutlet.attachComponentPortal(portal);
}
/**
* Attach a TemplatePortal as content to this dialog container.
* @param portal Portal to be attached as the dialog content.
*/
attachTemplatePortal(portal) {
if (this._portalOutlet.hasAttached()) {
throwMatDialogContentAlreadyAttachedError();
}
this._setupFocusTrap();
return this._portalOutlet.attachTemplatePortal(portal);
}
/** Moves focus back into the dialog if it was moved out. */
_recaptureFocus() {
if (!this._containsFocus()) {
const focusContainer = !this._config.autoFocus || !this._focusTrap.focusInitialElement();
if (focusContainer) {
this._elementRef.nativeElement.focus();
}
}
}
/** Moves the focus inside the focus trap. */
_trapFocus() {
// If we were to attempt to focus immediately, then the content of the dialog would not yet be
// ready in instances where change detection has to run first. To deal with this, we simply
// wait for the microtask queue to be empty.
if (this._config.autoFocus) {
this._focusTrap.focusInitialElementWhenReady();
}
else if (!this._containsFocus()) {
// Otherwise ensure that focus is on the dialog container. It's possible that a different
// component tried to move focus while the open animation was running. See:
// https://github.com/angular/components/issues/16215. Note that we only want to do this
// if the focus isn't inside the dialog already, because it's possible that the consumer
// turned off `autoFocus` in order to move focus themselves.
this._elementRef.nativeElement.focus();
}
}
/** Restores focus to the element that was focused before the dialog opened. */
_restoreFocus() {
const previousElement = this._elementFocusedBeforeDialogWasOpened;
// We need the extra check, because IE can set the `activeElement` to null in some cases.
if (this._config.restoreFocus && previousElement &&
typeof previousElement.focus === 'function') {
const activeElement = this._document.activeElement;
const element = this._elementRef.nativeElement;
// Make sure that focus is still inside the dialog or is on the body (usually because a
// non-focusable element like the backdrop was clicked) before moving it. It's possible that
// the consumer moved it themselves before the animation was done, in which case we shouldn't
// do anything.
if (!activeElement || activeElement === this._document.body || activeElement === element ||
element.contains(activeElement)) {
if (this._focusMonitor) {
this._focusMonitor.focusVia(previousElement, this._closeInteractionType);
this._closeInteractionType = null;
}
else {
previousElement.focus();
}
}
}
if (this._focusTrap) {
this._focusTrap.destroy();
}
}
/**
* Sets up the focus trand and saves a reference to the
* element that was focused before the dialog was opened.
*/
_setupFocusTrap() {
if (!this._focusTrap) {
this._focusTrap = this._focusTrapFactory.create(this._elementRef.nativeElement);
}
if (this._document) {
this._elementFocusedBeforeDialogWasOpened = this._document.activeElement;
// Note that there is no focus method when rendering on the server.
if (this._elementRef.nativeElement.focus) {
// Move focus onto the dialog immediately in order to prevent the user from accidentally
// opening multiple dialogs at the same time. Needs to be async, because the element
// may not be focusable immediately.
Promise.resolve().then(() => this._elementRef.nativeElement.focus());
}
}
}
/** Returns whether focus is inside the dialog. */
_containsFocus() {
const element = this._elementRef.nativeElement;
const activeElement = this._document.activeElement;
return element === activeElement || element.contains(activeElement);
}
/** Callback, invoked whenever an animation on the host completes. */
_onAnimationDone(event) {
if (event.toState === 'enter') {
this._trapFocus();
}
else if (event.toState === 'exit') {
this._restoreFocus();
}
this._animationStateChanged.emit(event);
}
/** Callback, invoked when an animation on the host starts. */
_onAnimationStart(event) {
this._animationStateChanged.emit(event);
}
/** Starts the dialog exit animation. */
_startExitAnimation() {
this._state = 'exit';
// Mark the container for check so it can react if the
// view container is using OnPush change detection.
this._changeDetectorRef.markForCheck();
}
}
MatDialogContainer.decorators = [
{ type: Component, args: [{
selector: 'mat-dialog-container',
template: "<ng-template cdkPortalOutlet></ng-template>\n",
encapsulation: ViewEncapsulation.None,
// Using OnPush for dialogs caused some G3 sync issues. Disabled until we can track them down.
// tslint:disable-next-line:validate-decorators
changeDetection: ChangeDetectionStrategy.Default,
animations: [matDialogAnimations.dialogContainer],
host: {
'class': 'mat-dialog-container',
'tabindex': '-1',
'aria-modal': 'true',
'[attr.id]': '_id',
'[attr.role]': '_config.role',
'[attr.aria-labelledby]': '_config.ariaLabel ? null : _ariaLabelledBy',
'[attr.aria-label]': '_config.ariaLabel',
'[attr.aria-describedby]': '_config.ariaDescribedBy || null',
'[@dialogContainer]': '_state',
'(@dialogContainer.start)': '_onAnimationStart($event)',
'(@dialogContainer.done)': '_onAnimationDone($event)',
},
styles: [".mat-dialog-container{display:block;padding:24px;border-radius:4px;box-sizing:border-box;overflow:auto;outline:0;width:100%;height:100%;min-height:inherit;max-height:inherit}.cdk-high-contrast-active .mat-dialog-container{outline:solid 1px}.mat-dialog-content{display:block;margin:0 -24px;padding:0 24px;max-height:65vh;overflow:auto;-webkit-overflow-scrolling:touch}.mat-dialog-title{margin:0 0 20px;display:block}.mat-dialog-actions{padding:8px 0;display:flex;flex-wrap:wrap;min-height:52px;align-items:center;margin-bottom:-24px}.mat-dialog-actions[align=end]{justify-content:flex-end}.mat-dialog-actions[align=center]{justify-content:center}.mat-dialog-actions .mat-button-base+.mat-button-base,.mat-dialog-actions .mat-mdc-button-base+.mat-mdc-button-base{margin-left:8px}[dir=rtl] .mat-dialog-actions .mat-button-base+.mat-button-base,[dir=rtl] .mat-dialog-actions .mat-mdc-button-base+.mat-mdc-button-base{margin-left:0;margin-right:8px}\n"]
},] }
];
MatDialogContainer.ctorParameters = () => [
{ type: ElementRef },
{ type: FocusTrapFactory },
{ type: ChangeDetectorRef },
{ type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [DOCUMENT,] }] },
{ type: MatDialogConfig },
{ type: FocusMonitor }
];
MatDialogContainer.propDecorators = {
_portalOutlet: [{ type: ViewChild, args: [CdkPortalOutlet, { static: true },] }]
};
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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 {\n  Component,\n  ComponentRef,\n  ElementRef,\n  EmbeddedViewRef,\n  EventEmitter,\n  Inject,\n  Optional,\n  ChangeDetectorRef,\n  ViewChild,\n  ViewEncapsulation,\n  ChangeDetectionStrategy,\n} from '@angular/core';\nimport {DOCUMENT} from '@angular/common';\nimport {AnimationEvent} from '@angular/animations';\nimport {matDialogAnimations} from './dialog-animations';\nimport {\n  BasePortalOutlet,\n  ComponentPortal,\n  CdkPortalOutlet,\n  TemplatePortal,\n  DomPortal\n} from '@angular/cdk/portal';\nimport {FocusTrap, FocusMonitor, FocusOrigin, FocusTrapFactory} from '@angular/cdk/a11y';\nimport {MatDialogConfig} from './dialog-config';\n\n\n/**\n * Throws an exception for the case when a ComponentPortal is\n * attached to a DomPortalOutlet without an origin.\n * @docs-private\n */\nexport function throwMatDialogContentAlreadyAttachedError() {\n  throw Error('Attempting to attach dialog content after content is already attached');\n}\n\n/**\n * Internal component that wraps user-provided dialog content.\n * Animation is based on https://material.io/guidelines/motion/choreography.html.\n * @docs-private\n */\n@Component({\n  selector: 'mat-dialog-container',\n  templateUrl: 'dialog-container.html',\n  styleUrls: ['dialog.css'],\n  encapsulation: ViewEncapsulation.None,\n  // Using OnPush for dialogs caused some G3 sync issues. Disabled until we can track them down.\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  animations: [matDialogAnimations.dialogContainer],\n  host: {\n    'class': 'mat-dialog-container',\n    'tabindex': '-1',\n    'aria-modal': 'true',\n    '[attr.id]': '_id',\n    '[attr.role]': '_config.role',\n    '[attr.aria-labelledby]': '_config.ariaLabel ? null : _ariaLabelledBy',\n    '[attr.aria-label]': '_config.ariaLabel',\n    '[attr.aria-describedby]': '_config.ariaDescribedBy || null',\n    '[@dialogContainer]': '_state',\n    '(@dialogContainer.start)': '_onAnimationStart($event)',\n    '(@dialogContainer.done)': '_onAnimationDone($event)',\n  },\n})\nexport class MatDialogContainer extends BasePortalOutlet {\n  private _document: Document;\n\n  /** The portal outlet inside of this container into which the dialog content will be loaded. */\n  @ViewChild(CdkPortalOutlet, {static: true}) _portalOutlet: CdkPortalOutlet;\n\n  /** The class that traps and manages focus within the dialog. */\n  private _focusTrap: FocusTrap;\n\n  /** Element that was focused before the dialog was opened. Save this to restore upon close. */\n  private _elementFocusedBeforeDialogWasOpened: HTMLElement | null = null;\n\n  /**\n   * Type of interaction that led to the dialog being closed. This is used to determine\n   * whether the focus style will be applied when returning focus to its original location\n   * after the dialog is closed.\n   */\n  _closeInteractionType: FocusOrigin|null = null;\n\n  /** State of the dialog animation. */\n  _state: 'void' | 'enter' | 'exit' = 'enter';\n\n  /** Emits when an animation state changes. */\n  _animationStateChanged = new EventEmitter<AnimationEvent>();\n\n  /** ID of the element that should be considered as the dialog's label. */\n  _ariaLabelledBy: string | null;\n\n  /** ID for the container DOM element. */\n  _id: string;\n\n  constructor(\n    private _elementRef: ElementRef,\n    private _focusTrapFactory: FocusTrapFactory,\n    private _changeDetectorRef: ChangeDetectorRef,\n    @Optional() @Inject(DOCUMENT) _document: any,\n    /** The dialog configuration. */\n    public _config: MatDialogConfig,\n    private _focusMonitor?: FocusMonitor) {\n\n    super();\n    this._ariaLabelledBy = _config.ariaLabelledBy || null;\n    this._document = _document;\n  }\n\n  /**\n   * Attach a ComponentPortal as content to this dialog container.\n   * @param portal Portal to be attached as the dialog content.\n   */\n  attachComponentPortal<T>(portal: ComponentPortal<T>): ComponentRef<T> {\n    if (this._portalOutlet.hasAttached()) {\n      throwMatDialogContentAlreadyAttachedError();\n    }\n\n    this._setupFocusTrap();\n    return this._portalOutlet.attachComponentPortal(portal);\n  }\n\n  /**\n   * Attach a TemplatePortal as content to this dialog container.\n   * @param portal Portal to be attached as the dialog content.\n   */\n  attachTemplatePortal<C>(portal: TemplatePortal<C>): EmbeddedViewRef<C> {\n    if (this._portalOutlet.hasAttached()) {\n      throwMatDialogContentAlreadyAttachedError();\n    }\n\n    this._setupFocusTrap();\n    return this._portalOutlet.attachTemplatePortal(portal);\n  }\n\n  /**\n   * Attaches a DOM portal to the dialog container.\n   * @param portal Portal to be attached.\n   * @deprecated To be turned into a method.\n   * @breaking-change 10.0.0\n   */\n  attachDomPortal = (portal: DomPortal) => {\n    if (this._portalOutlet.hasAttached()) {\n      throwMatDialogContentAlreadyAttachedError();\n    }\n\n    this._setupFocusTrap();\n    return this._portalOutlet.attachDomPortal(portal);\n  }\n\n  /** Moves focus back into the dialog if it was moved out. */\n  _recaptureFocus() {\n    if (!this._containsFocus()) {\n      const focusContainer = !this._config.autoFocus || !this._focusTrap.focusInitialElement();\n\n      if (focusContainer) {\n        this._elementRef.nativeElement.focus();\n      }\n    }\n  }\n\n  /** Moves the focus inside the focus trap. */\n  private _trapFocus() {\n    // If we were to attempt to focus immediately, then the content of the dialog would not yet be\n    // ready in instances where change detection has to run first. To deal with this, we simply\n    // wait for the microtask queue to be empty.\n    if (this._config.autoFocus) {\n      this._focusTrap.focusInitialElementWhenReady();\n    } else if (!this._containsFocus()) {\n      // Otherwise ensure that focus is on the dialog container. It's possible that a different\n      // component tried to move focus while the open animation was running. See:\n      // https://github.com/angular/components/issues/16215. Note that we only want to do this\n      // if the focus isn't inside the dialog already, because it's possible that the consumer\n      // turned off `autoFocus` in order to move focus themselves.\n      this._elementRef.nativeElement.focus();\n    }\n  }\n\n  /** Restores focus to the element that was focused before the dialog opened. */\n  private _restoreFocus() {\n    const previousElement = this._elementFocusedBeforeDialogWasOpened;\n\n    // We need the extra check, because IE can set the `activeElement` to null in some cases.\n    if (this._config.restoreFocus && previousElement &&\n        typeof previousElement.focus === 'function') {\n      const activeElement = this._document.activeElement;\n      const element = this._elementRef.nativeElement;\n\n      // Make sure that focus is still inside the dialog or is on the body (usually because a\n      // non-focusable element like the backdrop was clicked) before moving it. It's possible that\n      // the consumer moved it themselves before the animation was done, in which case we shouldn't\n      // do anything.\n      if (!activeElement || activeElement === this._document.body || activeElement === element ||\n          element.contains(activeElement)) {\n        if (this._focusMonitor) {\n          this._focusMonitor.focusVia(previousElement, this._closeInteractionType);\n          this._closeInteractionType = null;\n        } else {\n          previousElement.focus();\n        }\n      }\n    }\n\n    if (this._focusTrap) {\n      this._focusTrap.destroy();\n    }\n  }\n\n  /**\n   * Sets up the focus trand and saves a reference to the\n   * element that was focused before the dialog was opened.\n   */\n  private _setupFocusTrap() {\n    if (!this._focusTrap) {\n      this._focusTrap = this._focusTrapFactory.create(this._elementRef.nativeElement);\n    }\n\n    if (this._document) {\n      this._elementFocusedBeforeDialogWasOpened = this._document.activeElement as HTMLElement;\n\n      // Note that there is no focus method when rendering on the server.\n      if (this._elementRef.nativeElement.focus) {\n        // Move focus onto the dialog immediately in order to prevent the user from accidentally\n        // opening multiple dialogs at the same time. Needs to be async, because the element\n        // may not be focusable immediately.\n        Promise.resolve().then(() => this._elementRef.nativeElement.focus());\n      }\n    }\n  }\n\n  /** Returns whether focus is inside the dialog. */\n  private _containsFocus() {\n    const element = this._elementRef.nativeElement;\n    const activeElement = this._document.activeElement;\n    return element === activeElement || element.contains(activeElement);\n  }\n\n  /** Callback, invoked whenever an animation on the host completes. */\n  _onAnimationDone(event: AnimationEvent) {\n    if (event.toState === 'enter') {\n      this._trapFocus();\n    } else if (event.toState === 'exit') {\n      this._restoreFocus();\n    }\n\n    this._animationStateChanged.emit(event);\n  }\n\n  /** Callback, invoked when an animation on the host starts. */\n  _onAnimationStart(event: AnimationEvent) {\n    this._animationStateChanged.emit(event);\n  }\n\n  /** Starts the dialog exit animation. */\n  _startExitAnimation(): void {\n    this._state = 'exit';\n\n    // Mark the container for check so it can react if the\n    // view container is using OnPush change detection.\n    this._changeDetectorRef.markForCheck();\n  }\n}\n"]}