@angular/material
Version:
Angular Material
212 lines • 29.5 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, ChangeDetectorRef, Input, Inject, Output, EventEmitter, ElementRef, Directive, Optional, ViewEncapsulation, ChangeDetectionStrategy, ComponentFactoryResolver, ViewContainerRef, forwardRef, ViewChild, } from '@angular/core';
import { TemplatePortal, CdkPortalOutlet, PortalHostDirective } from '@angular/cdk/portal';
import { Directionality } from '@angular/cdk/bidi';
import { DOCUMENT } from '@angular/common';
import { Subscription, Subject } from 'rxjs';
import { matTabsAnimations } from './tabs-animations';
import { startWith, distinctUntilChanged } from 'rxjs/operators';
/**
* The portal host directive for the contents of the tab.
* @docs-private
*/
export class MatTabBodyPortal extends CdkPortalOutlet {
constructor(componentFactoryResolver, viewContainerRef, _host, _document) {
super(componentFactoryResolver, viewContainerRef, _document);
this._host = _host;
/** Subscription to events for when the tab body begins centering. */
this._centeringSub = Subscription.EMPTY;
/** Subscription to events for when the tab body finishes leaving from center position. */
this._leavingSub = Subscription.EMPTY;
}
/** Set initial visibility or set up subscription for changing visibility. */
ngOnInit() {
super.ngOnInit();
this._centeringSub = this._host._beforeCentering
.pipe(startWith(this._host._isCenterPosition(this._host._position)))
.subscribe((isCentering) => {
if (isCentering && !this.hasAttached()) {
this.attach(this._host._content);
}
});
this._leavingSub = this._host._afterLeavingCenter.subscribe(() => {
this.detach();
});
}
/** Clean up centering subscription. */
ngOnDestroy() {
super.ngOnDestroy();
this._centeringSub.unsubscribe();
this._leavingSub.unsubscribe();
}
}
MatTabBodyPortal.decorators = [
{ type: Directive, args: [{
selector: '[matTabBodyHost]'
},] }
];
MatTabBodyPortal.ctorParameters = () => [
{ type: ComponentFactoryResolver },
{ type: ViewContainerRef },
{ type: MatTabBody, decorators: [{ type: Inject, args: [forwardRef(() => MatTabBody),] }] },
{ type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] }
];
/**
* Base class with all of the `MatTabBody` functionality.
* @docs-private
*/
export class _MatTabBodyBase {
constructor(_elementRef, _dir, changeDetectorRef) {
this._elementRef = _elementRef;
this._dir = _dir;
/** Subscription to the directionality change observable. */
this._dirChangeSubscription = Subscription.EMPTY;
/** Emits when an animation on the tab is complete. */
this._translateTabComplete = new Subject();
/** Event emitted when the tab begins to animate towards the center as the active tab. */
this._onCentering = new EventEmitter();
/** Event emitted before the centering of the tab begins. */
this._beforeCentering = new EventEmitter();
/** Event emitted before the centering of the tab begins. */
this._afterLeavingCenter = new EventEmitter();
/** Event emitted when the tab completes its animation towards the center. */
this._onCentered = new EventEmitter(true);
// Note that the default value will always be overwritten by `MatTabBody`, but we need one
// anyway to prevent the animations module from throwing an error if the body is used on its own.
/** Duration for the tab's animation. */
this.animationDuration = '500ms';
if (_dir) {
this._dirChangeSubscription = _dir.change.subscribe((dir) => {
this._computePositionAnimationState(dir);
changeDetectorRef.markForCheck();
});
}
// Ensure that we get unique animation events, because the `.done` callback can get
// invoked twice in some browsers. See https://github.com/angular/angular/issues/24084.
this._translateTabComplete.pipe(distinctUntilChanged((x, y) => {
return x.fromState === y.fromState && x.toState === y.toState;
})).subscribe(event => {
// If the transition to the center is complete, emit an event.
if (this._isCenterPosition(event.toState) && this._isCenterPosition(this._position)) {
this._onCentered.emit();
}
if (this._isCenterPosition(event.fromState) && !this._isCenterPosition(this._position)) {
this._afterLeavingCenter.emit();
}
});
}
/** The shifted index position of the tab body, where zero represents the active center tab. */
set position(position) {
this._positionIndex = position;
this._computePositionAnimationState();
}
/**
* After initialized, check if the content is centered and has an origin. If so, set the
* special position states that transition the tab from the left or right before centering.
*/
ngOnInit() {
if (this._position == 'center' && this.origin != null) {
this._position = this._computePositionFromOrigin(this.origin);
}
}
ngOnDestroy() {
this._dirChangeSubscription.unsubscribe();
this._translateTabComplete.complete();
}
_onTranslateTabStarted(event) {
const isCentering = this._isCenterPosition(event.toState);
this._beforeCentering.emit(isCentering);
if (isCentering) {
this._onCentering.emit(this._elementRef.nativeElement.clientHeight);
}
}
/** The text direction of the containing app. */
_getLayoutDirection() {
return this._dir && this._dir.value === 'rtl' ? 'rtl' : 'ltr';
}
/** Whether the provided position state is considered center, regardless of origin. */
_isCenterPosition(position) {
return position == 'center' ||
position == 'left-origin-center' ||
position == 'right-origin-center';
}
/** Computes the position state that will be used for the tab-body animation trigger. */
_computePositionAnimationState(dir = this._getLayoutDirection()) {
if (this._positionIndex < 0) {
this._position = dir == 'ltr' ? 'left' : 'right';
}
else if (this._positionIndex > 0) {
this._position = dir == 'ltr' ? 'right' : 'left';
}
else {
this._position = 'center';
}
}
/**
* Computes the position state based on the specified origin position. This is used if the
* tab is becoming visible immediately after creation.
*/
_computePositionFromOrigin(origin) {
const dir = this._getLayoutDirection();
if ((dir == 'ltr' && origin <= 0) || (dir == 'rtl' && origin > 0)) {
return 'left-origin-center';
}
return 'right-origin-center';
}
}
_MatTabBodyBase.decorators = [
{ type: Directive }
];
_MatTabBodyBase.ctorParameters = () => [
{ type: ElementRef },
{ type: Directionality, decorators: [{ type: Optional }] },
{ type: ChangeDetectorRef }
];
_MatTabBodyBase.propDecorators = {
_onCentering: [{ type: Output }],
_beforeCentering: [{ type: Output }],
_afterLeavingCenter: [{ type: Output }],
_onCentered: [{ type: Output }],
_content: [{ type: Input, args: ['content',] }],
origin: [{ type: Input }],
animationDuration: [{ type: Input }],
position: [{ type: Input }]
};
/**
* Wrapper for the contents of a tab.
* @docs-private
*/
export class MatTabBody extends _MatTabBodyBase {
constructor(elementRef, dir, changeDetectorRef) {
super(elementRef, dir, changeDetectorRef);
}
}
MatTabBody.decorators = [
{ type: Component, args: [{
selector: 'mat-tab-body',
template: "<div class=\"mat-tab-body-content\" #content\n [@translateTab]=\"{\n value: _position,\n params: {animationDuration: animationDuration}\n }\"\n (@translateTab.start)=\"_onTranslateTabStarted($event)\"\n (@translateTab.done)=\"_translateTabComplete.next($event)\">\n <ng-template matTabBodyHost></ng-template>\n</div>\n",
encapsulation: ViewEncapsulation.None,
// tslint:disable-next-line:validate-decorators
changeDetection: ChangeDetectionStrategy.Default,
animations: [matTabsAnimations.translateTab],
host: {
'class': 'mat-tab-body',
},
styles: [".mat-tab-body-content{height:100%;overflow:auto}.mat-tab-group-dynamic-height .mat-tab-body-content{overflow:hidden}\n"]
},] }
];
MatTabBody.ctorParameters = () => [
{ type: ElementRef },
{ type: Directionality, decorators: [{ type: Optional }] },
{ type: ChangeDetectorRef }
];
MatTabBody.propDecorators = {
_portalHost: [{ type: ViewChild, args: [PortalHostDirective,] }]
};
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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  ChangeDetectorRef,\n  Input,\n  Inject,\n  Output,\n  EventEmitter,\n  OnDestroy,\n  OnInit,\n  ElementRef,\n  Directive,\n  Optional,\n  ViewEncapsulation,\n  ChangeDetectionStrategy,\n  ComponentFactoryResolver,\n  ViewContainerRef,\n  forwardRef,\n  ViewChild,\n} from '@angular/core';\nimport {AnimationEvent} from '@angular/animations';\nimport {TemplatePortal, CdkPortalOutlet, PortalHostDirective} from '@angular/cdk/portal';\nimport {Directionality, Direction} from '@angular/cdk/bidi';\nimport {DOCUMENT} from '@angular/common';\nimport {Subscription, Subject} from 'rxjs';\nimport {matTabsAnimations} from './tabs-animations';\nimport {startWith, distinctUntilChanged} from 'rxjs/operators';\n\n/**\n * These position states are used internally as animation states for the tab body. Setting the\n * position state to left, right, or center will transition the tab body from its current\n * position to its respective state. If there is not current position (void, in the case of a new\n * tab body), then there will be no transition animation to its state.\n *\n * In the case of a new tab body that should immediately be centered with an animating transition,\n * then left-origin-center or right-origin-center can be used, which will use left or right as its\n * psuedo-prior state.\n */\nexport type MatTabBodyPositionState =\n    'left' | 'center' | 'right' | 'left-origin-center' | 'right-origin-center';\n\n/**\n * The origin state is an internally used state that is set on a new tab body indicating if it\n * began to the left or right of the prior selected index. For example, if the selected index was\n * set to 1, and a new tab is created and selected at index 2, then the tab body would have an\n * origin of right because its index was greater than the prior selected index.\n */\nexport type MatTabBodyOriginState = 'left' | 'right';\n\n/**\n * The portal host directive for the contents of the tab.\n * @docs-private\n */\n@Directive({\n  selector: '[matTabBodyHost]'\n})\nexport class MatTabBodyPortal extends CdkPortalOutlet implements OnInit, OnDestroy {\n  /** Subscription to events for when the tab body begins centering. */\n  private _centeringSub = Subscription.EMPTY;\n  /** Subscription to events for when the tab body finishes leaving from center position. */\n  private _leavingSub = Subscription.EMPTY;\n\n  constructor(\n    componentFactoryResolver: ComponentFactoryResolver,\n    viewContainerRef: ViewContainerRef,\n    @Inject(forwardRef(() => MatTabBody)) private _host: MatTabBody,\n    @Inject(DOCUMENT) _document: any) {\n    super(componentFactoryResolver, viewContainerRef, _document);\n  }\n\n  /** Set initial visibility or set up subscription for changing visibility. */\n  ngOnInit(): void {\n    super.ngOnInit();\n\n    this._centeringSub = this._host._beforeCentering\n      .pipe(startWith(this._host._isCenterPosition(this._host._position)))\n      .subscribe((isCentering: boolean) => {\n        if (isCentering && !this.hasAttached()) {\n          this.attach(this._host._content);\n        }\n      });\n\n    this._leavingSub = this._host._afterLeavingCenter.subscribe(() => {\n      this.detach();\n    });\n  }\n\n  /** Clean up centering subscription. */\n  ngOnDestroy(): void {\n    super.ngOnDestroy();\n    this._centeringSub.unsubscribe();\n    this._leavingSub.unsubscribe();\n  }\n}\n\n/**\n * Base class with all of the `MatTabBody` functionality.\n * @docs-private\n */\n@Directive()\nexport abstract class _MatTabBodyBase implements OnInit, OnDestroy {\n  /** Current position of the tab-body in the tab-group. Zero means that the tab is visible. */\n  private _positionIndex: number;\n\n  /** Subscription to the directionality change observable. */\n  private _dirChangeSubscription = Subscription.EMPTY;\n\n  /** Tab body position state. Used by the animation trigger for the current state. */\n  _position: MatTabBodyPositionState;\n\n  /** Emits when an animation on the tab is complete. */\n  _translateTabComplete = new Subject<AnimationEvent>();\n\n  /** Event emitted when the tab begins to animate towards the center as the active tab. */\n  @Output() readonly _onCentering: EventEmitter<number> = new EventEmitter<number>();\n\n  /** Event emitted before the centering of the tab begins. */\n  @Output() readonly _beforeCentering: EventEmitter<boolean> = new EventEmitter<boolean>();\n\n  /** Event emitted before the centering of the tab begins. */\n  @Output() readonly _afterLeavingCenter: EventEmitter<void> = new EventEmitter<void>();\n\n  /** Event emitted when the tab completes its animation towards the center. */\n  @Output() readonly _onCentered: EventEmitter<void> = new EventEmitter<void>(true);\n\n   /** The portal host inside of this container into which the tab body content will be loaded. */\n  abstract _portalHost: PortalHostDirective;\n\n  /** The tab body content to display. */\n  @Input('content') _content: TemplatePortal;\n\n  /** Position that will be used when the tab is immediately becoming visible after creation. */\n  @Input() origin: number | null;\n\n  // Note that the default value will always be overwritten by `MatTabBody`, but we need one\n  // anyway to prevent the animations module from throwing an error if the body is used on its own.\n  /** Duration for the tab's animation. */\n  @Input() animationDuration: string = '500ms';\n\n  /** The shifted index position of the tab body, where zero represents the active center tab. */\n  @Input()\n  set position(position: number) {\n    this._positionIndex = position;\n    this._computePositionAnimationState();\n  }\n\n  constructor(private _elementRef: ElementRef<HTMLElement>,\n              @Optional() private _dir: Directionality,\n              changeDetectorRef: ChangeDetectorRef) {\n\n    if (_dir) {\n      this._dirChangeSubscription = _dir.change.subscribe((dir: Direction) => {\n        this._computePositionAnimationState(dir);\n        changeDetectorRef.markForCheck();\n      });\n    }\n\n    // Ensure that we get unique animation events, because the `.done` callback can get\n    // invoked twice in some browsers. See https://github.com/angular/angular/issues/24084.\n    this._translateTabComplete.pipe(distinctUntilChanged((x, y) => {\n      return x.fromState === y.fromState && x.toState === y.toState;\n    })).subscribe(event => {\n      // If the transition to the center is complete, emit an event.\n      if (this._isCenterPosition(event.toState) && this._isCenterPosition(this._position)) {\n        this._onCentered.emit();\n      }\n\n      if (this._isCenterPosition(event.fromState) && !this._isCenterPosition(this._position)) {\n        this._afterLeavingCenter.emit();\n      }\n    });\n  }\n\n  /**\n   * After initialized, check if the content is centered and has an origin. If so, set the\n   * special position states that transition the tab from the left or right before centering.\n   */\n  ngOnInit() {\n    if (this._position == 'center' && this.origin != null) {\n      this._position = this._computePositionFromOrigin(this.origin);\n    }\n  }\n\n  ngOnDestroy() {\n    this._dirChangeSubscription.unsubscribe();\n    this._translateTabComplete.complete();\n  }\n\n  _onTranslateTabStarted(event: AnimationEvent): void {\n    const isCentering = this._isCenterPosition(event.toState);\n    this._beforeCentering.emit(isCentering);\n    if (isCentering) {\n      this._onCentering.emit(this._elementRef.nativeElement.clientHeight);\n    }\n  }\n\n  /** The text direction of the containing app. */\n  _getLayoutDirection(): Direction {\n    return this._dir && this._dir.value === 'rtl' ? 'rtl' : 'ltr';\n  }\n\n  /** Whether the provided position state is considered center, regardless of origin. */\n  _isCenterPosition(position: MatTabBodyPositionState|string): boolean {\n    return position == 'center' ||\n        position == 'left-origin-center' ||\n        position == 'right-origin-center';\n  }\n\n  /** Computes the position state that will be used for the tab-body animation trigger. */\n  private _computePositionAnimationState(dir: Direction = this._getLayoutDirection()) {\n    if (this._positionIndex < 0) {\n      this._position = dir == 'ltr' ? 'left' : 'right';\n    } else if (this._positionIndex > 0) {\n      this._position = dir == 'ltr' ? 'right' : 'left';\n    } else {\n      this._position = 'center';\n    }\n  }\n\n  /**\n   * Computes the position state based on the specified origin position. This is used if the\n   * tab is becoming visible immediately after creation.\n   */\n  private _computePositionFromOrigin(origin: number): MatTabBodyPositionState {\n    const dir = this._getLayoutDirection();\n\n    if ((dir == 'ltr' && origin <= 0) || (dir == 'rtl' && origin > 0)) {\n      return 'left-origin-center';\n    }\n\n    return 'right-origin-center';\n  }\n}\n\n/**\n * Wrapper for the contents of a tab.\n * @docs-private\n */\n@Component({\n  selector: 'mat-tab-body',\n  templateUrl: 'tab-body.html',\n  styleUrls: ['tab-body.css'],\n  encapsulation: ViewEncapsulation.None,\n  // tslint:disable-next-line:validate-decorators\n  changeDetection: ChangeDetectionStrategy.Default,\n  animations: [matTabsAnimations.translateTab],\n  host: {\n    'class': 'mat-tab-body',\n  }\n})\nexport class MatTabBody extends _MatTabBodyBase {\n  @ViewChild(PortalHostDirective) _portalHost: PortalHostDirective;\n\n  constructor(elementRef: ElementRef<HTMLElement>,\n              @Optional() dir: Directionality,\n              changeDetectorRef: ChangeDetectorRef) {\n    super(elementRef, dir, changeDetectorRef);\n  }\n}\n"]}