@angular/cdk
Version:
Angular Material Component Development Kit
366 lines • 46.5 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 { Directionality } from '@angular/cdk/bidi';
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { ESCAPE, hasModifierKey } from '@angular/cdk/keycodes';
import { TemplatePortal } from '@angular/cdk/portal';
import { Directive, ElementRef, EventEmitter, Inject, InjectionToken, Input, Optional, Output, TemplateRef, ViewContainerRef, } from '@angular/core';
import { Subscription } from 'rxjs';
import { Overlay } from './overlay';
import { OverlayConfig } from './overlay-config';
import { FlexibleConnectedPositionStrategy, } from './position/flexible-connected-position-strategy';
/** Default set of positions for the overlay. Follows the behavior of a dropdown. */
var defaultPositionList = [
{
originX: 'start',
originY: 'bottom',
overlayX: 'start',
overlayY: 'top'
},
{
originX: 'start',
originY: 'top',
overlayX: 'start',
overlayY: 'bottom'
},
{
originX: 'end',
originY: 'top',
overlayX: 'end',
overlayY: 'bottom'
},
{
originX: 'end',
originY: 'bottom',
overlayX: 'end',
overlayY: 'top'
}
];
/** Injection token that determines the scroll handling while the connected overlay is open. */
export var CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY = new InjectionToken('cdk-connected-overlay-scroll-strategy');
/** @docs-private @deprecated @breaking-change 8.0.0 */
export function CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_FACTORY(overlay) {
return function (config) { return overlay.scrollStrategies.reposition(config); };
}
/**
* Directive applied to an element to make it usable as an origin for an Overlay using a
* ConnectedPositionStrategy.
*/
var CdkOverlayOrigin = /** @class */ (function () {
function CdkOverlayOrigin(
/** Reference to the element on which the directive is applied. */
elementRef) {
this.elementRef = elementRef;
}
CdkOverlayOrigin.decorators = [
{ type: Directive, args: [{
selector: '[cdk-overlay-origin], [overlay-origin], [cdkOverlayOrigin]',
exportAs: 'cdkOverlayOrigin',
},] }
];
/** @nocollapse */
CdkOverlayOrigin.ctorParameters = function () { return [
{ type: ElementRef }
]; };
return CdkOverlayOrigin;
}());
export { CdkOverlayOrigin };
/**
* Directive to facilitate declarative creation of an
* Overlay using a FlexibleConnectedPositionStrategy.
*/
var CdkConnectedOverlay = /** @class */ (function () {
// TODO(jelbourn): inputs for size, scroll behavior, animation, etc.
function CdkConnectedOverlay(_overlay, templateRef, viewContainerRef, scrollStrategyFactory, _dir) {
this._overlay = _overlay;
this._dir = _dir;
this._hasBackdrop = false;
this._lockPosition = false;
this._growAfterOpen = false;
this._flexibleDimensions = false;
this._push = false;
this._backdropSubscription = Subscription.EMPTY;
/** Margin between the overlay and the viewport edges. */
this.viewportMargin = 0;
/** Whether the overlay is open. */
this.open = false;
/** Event emitted when the backdrop is clicked. */
this.backdropClick = new EventEmitter();
/** Event emitted when the position has changed. */
this.positionChange = new EventEmitter();
/** Event emitted when the overlay has been attached. */
this.attach = new EventEmitter();
/** Event emitted when the overlay has been detached. */
this.detach = new EventEmitter();
/** Emits when there are keyboard events that are targeted at the overlay. */
this.overlayKeydown = new EventEmitter();
this._templatePortal = new TemplatePortal(templateRef, viewContainerRef);
this._scrollStrategyFactory = scrollStrategyFactory;
this.scrollStrategy = this._scrollStrategyFactory();
}
Object.defineProperty(CdkConnectedOverlay.prototype, "offsetX", {
/** The offset in pixels for the overlay connection point on the x-axis */
get: function () { return this._offsetX; },
set: function (offsetX) {
this._offsetX = offsetX;
if (this._position) {
this._updatePositionStrategy(this._position);
}
},
enumerable: true,
configurable: true
});
Object.defineProperty(CdkConnectedOverlay.prototype, "offsetY", {
/** The offset in pixels for the overlay connection point on the y-axis */
get: function () { return this._offsetY; },
set: function (offsetY) {
this._offsetY = offsetY;
if (this._position) {
this._updatePositionStrategy(this._position);
}
},
enumerable: true,
configurable: true
});
Object.defineProperty(CdkConnectedOverlay.prototype, "hasBackdrop", {
/** Whether or not the overlay should attach a backdrop. */
get: function () { return this._hasBackdrop; },
set: function (value) { this._hasBackdrop = coerceBooleanProperty(value); },
enumerable: true,
configurable: true
});
Object.defineProperty(CdkConnectedOverlay.prototype, "lockPosition", {
/** Whether or not the overlay should be locked when scrolling. */
get: function () { return this._lockPosition; },
set: function (value) { this._lockPosition = coerceBooleanProperty(value); },
enumerable: true,
configurable: true
});
Object.defineProperty(CdkConnectedOverlay.prototype, "flexibleDimensions", {
/** Whether the overlay's width and height can be constrained to fit within the viewport. */
get: function () { return this._flexibleDimensions; },
set: function (value) {
this._flexibleDimensions = coerceBooleanProperty(value);
},
enumerable: true,
configurable: true
});
Object.defineProperty(CdkConnectedOverlay.prototype, "growAfterOpen", {
/** Whether the overlay can grow after the initial open when flexible positioning is turned on. */
get: function () { return this._growAfterOpen; },
set: function (value) { this._growAfterOpen = coerceBooleanProperty(value); },
enumerable: true,
configurable: true
});
Object.defineProperty(CdkConnectedOverlay.prototype, "push", {
/** Whether the overlay can be pushed on-screen if none of the provided positions fit. */
get: function () { return this._push; },
set: function (value) { this._push = coerceBooleanProperty(value); },
enumerable: true,
configurable: true
});
Object.defineProperty(CdkConnectedOverlay.prototype, "overlayRef", {
/** The associated overlay reference. */
get: function () {
return this._overlayRef;
},
enumerable: true,
configurable: true
});
Object.defineProperty(CdkConnectedOverlay.prototype, "dir", {
/** The element's layout direction. */
get: function () {
return this._dir ? this._dir.value : 'ltr';
},
enumerable: true,
configurable: true
});
CdkConnectedOverlay.prototype.ngOnDestroy = function () {
if (this._overlayRef) {
this._overlayRef.dispose();
}
this._backdropSubscription.unsubscribe();
};
CdkConnectedOverlay.prototype.ngOnChanges = function (changes) {
if (this._position) {
this._updatePositionStrategy(this._position);
this._overlayRef.updateSize({
width: this.width,
minWidth: this.minWidth,
height: this.height,
minHeight: this.minHeight,
});
if (changes['origin'] && this.open) {
this._position.apply();
}
}
if (changes['open']) {
this.open ? this._attachOverlay() : this._detachOverlay();
}
};
/** Creates an overlay */
CdkConnectedOverlay.prototype._createOverlay = function () {
var _this = this;
if (!this.positions || !this.positions.length) {
this.positions = defaultPositionList;
}
this._overlayRef = this._overlay.create(this._buildConfig());
this._overlayRef.keydownEvents().subscribe(function (event) {
_this.overlayKeydown.next(event);
if (event.keyCode === ESCAPE && !hasModifierKey(event)) {
event.preventDefault();
_this._detachOverlay();
}
});
};
/** Builds the overlay config based on the directive's inputs */
CdkConnectedOverlay.prototype._buildConfig = function () {
var positionStrategy = this._position =
this.positionStrategy || this._createPositionStrategy();
var overlayConfig = new OverlayConfig({
direction: this._dir,
positionStrategy: positionStrategy,
scrollStrategy: this.scrollStrategy,
hasBackdrop: this.hasBackdrop
});
if (this.width || this.width === 0) {
overlayConfig.width = this.width;
}
if (this.height || this.height === 0) {
overlayConfig.height = this.height;
}
if (this.minWidth || this.minWidth === 0) {
overlayConfig.minWidth = this.minWidth;
}
if (this.minHeight || this.minHeight === 0) {
overlayConfig.minHeight = this.minHeight;
}
if (this.backdropClass) {
overlayConfig.backdropClass = this.backdropClass;
}
if (this.panelClass) {
overlayConfig.panelClass = this.panelClass;
}
return overlayConfig;
};
/** Updates the state of a position strategy, based on the values of the directive inputs. */
CdkConnectedOverlay.prototype._updatePositionStrategy = function (positionStrategy) {
var _this = this;
var positions = this.positions.map(function (currentPosition) { return ({
originX: currentPosition.originX,
originY: currentPosition.originY,
overlayX: currentPosition.overlayX,
overlayY: currentPosition.overlayY,
offsetX: currentPosition.offsetX || _this.offsetX,
offsetY: currentPosition.offsetY || _this.offsetY,
panelClass: currentPosition.panelClass || undefined,
}); });
return positionStrategy
.setOrigin(this.origin.elementRef)
.withPositions(positions)
.withFlexibleDimensions(this.flexibleDimensions)
.withPush(this.push)
.withGrowAfterOpen(this.growAfterOpen)
.withViewportMargin(this.viewportMargin)
.withLockedPosition(this.lockPosition)
.withTransformOriginOn(this.transformOriginSelector);
};
/** Returns the position strategy of the overlay to be set on the overlay config */
CdkConnectedOverlay.prototype._createPositionStrategy = function () {
var _this = this;
var strategy = this._overlay.position().flexibleConnectedTo(this.origin.elementRef);
this._updatePositionStrategy(strategy);
strategy.positionChanges.subscribe(function (p) { return _this.positionChange.emit(p); });
return strategy;
};
/** Attaches the overlay and subscribes to backdrop clicks if backdrop exists */
CdkConnectedOverlay.prototype._attachOverlay = function () {
var _this = this;
if (!this._overlayRef) {
this._createOverlay();
}
else {
// Update the overlay size, in case the directive's inputs have changed
this._overlayRef.getConfig().hasBackdrop = this.hasBackdrop;
}
if (!this._overlayRef.hasAttached()) {
this._overlayRef.attach(this._templatePortal);
this.attach.emit();
}
if (this.hasBackdrop) {
this._backdropSubscription = this._overlayRef.backdropClick().subscribe(function (event) {
_this.backdropClick.emit(event);
});
}
else {
this._backdropSubscription.unsubscribe();
}
};
/** Detaches the overlay and unsubscribes to backdrop clicks if backdrop exists */
CdkConnectedOverlay.prototype._detachOverlay = function () {
if (this._overlayRef) {
this._overlayRef.detach();
this.detach.emit();
}
this._backdropSubscription.unsubscribe();
};
CdkConnectedOverlay.decorators = [
{ type: Directive, args: [{
selector: '[cdk-connected-overlay], [connected-overlay], [cdkConnectedOverlay]',
exportAs: 'cdkConnectedOverlay'
},] }
];
/** @nocollapse */
CdkConnectedOverlay.ctorParameters = function () { return [
{ type: Overlay },
{ type: TemplateRef },
{ type: ViewContainerRef },
{ type: undefined, decorators: [{ type: Inject, args: [CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY,] }] },
{ type: Directionality, decorators: [{ type: Optional }] }
]; };
CdkConnectedOverlay.propDecorators = {
origin: [{ type: Input, args: ['cdkConnectedOverlayOrigin',] }],
positions: [{ type: Input, args: ['cdkConnectedOverlayPositions',] }],
positionStrategy: [{ type: Input, args: ['cdkConnectedOverlayPositionStrategy',] }],
offsetX: [{ type: Input, args: ['cdkConnectedOverlayOffsetX',] }],
offsetY: [{ type: Input, args: ['cdkConnectedOverlayOffsetY',] }],
width: [{ type: Input, args: ['cdkConnectedOverlayWidth',] }],
height: [{ type: Input, args: ['cdkConnectedOverlayHeight',] }],
minWidth: [{ type: Input, args: ['cdkConnectedOverlayMinWidth',] }],
minHeight: [{ type: Input, args: ['cdkConnectedOverlayMinHeight',] }],
backdropClass: [{ type: Input, args: ['cdkConnectedOverlayBackdropClass',] }],
panelClass: [{ type: Input, args: ['cdkConnectedOverlayPanelClass',] }],
viewportMargin: [{ type: Input, args: ['cdkConnectedOverlayViewportMargin',] }],
scrollStrategy: [{ type: Input, args: ['cdkConnectedOverlayScrollStrategy',] }],
open: [{ type: Input, args: ['cdkConnectedOverlayOpen',] }],
transformOriginSelector: [{ type: Input, args: ['cdkConnectedOverlayTransformOriginOn',] }],
hasBackdrop: [{ type: Input, args: ['cdkConnectedOverlayHasBackdrop',] }],
lockPosition: [{ type: Input, args: ['cdkConnectedOverlayLockPosition',] }],
flexibleDimensions: [{ type: Input, args: ['cdkConnectedOverlayFlexibleDimensions',] }],
growAfterOpen: [{ type: Input, args: ['cdkConnectedOverlayGrowAfterOpen',] }],
push: [{ type: Input, args: ['cdkConnectedOverlayPush',] }],
backdropClick: [{ type: Output }],
positionChange: [{ type: Output }],
attach: [{ type: Output }],
detach: [{ type: Output }],
overlayKeydown: [{ type: Output }]
};
return CdkConnectedOverlay;
}());
export { CdkConnectedOverlay };
/** @docs-private */
export function CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay) {
return function () { return overlay.scrollStrategies.reposition(); };
}
/** @docs-private */
export var CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER = {
provide: CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY,
deps: [Overlay],
useFactory: CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER_FACTORY,
};
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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 {Direction, Directionality} from '@angular/cdk/bidi';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {ESCAPE, hasModifierKey} from '@angular/cdk/keycodes';\nimport {TemplatePortal} from '@angular/cdk/portal';\nimport {\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  InjectionToken,\n  Input,\n  OnChanges,\n  OnDestroy,\n  Optional,\n  Output,\n  SimpleChanges,\n  TemplateRef,\n  ViewContainerRef,\n} from '@angular/core';\nimport {Subscription} from 'rxjs';\nimport {Overlay} from './overlay';\nimport {OverlayConfig} from './overlay-config';\nimport {OverlayRef} from './overlay-ref';\nimport {ConnectedOverlayPositionChange} from './position/connected-position';\nimport {\n  ConnectedPosition,\n  FlexibleConnectedPositionStrategy,\n} from './position/flexible-connected-position-strategy';\nimport {\n  RepositionScrollStrategy,\n  RepositionScrollStrategyConfig,\n  ScrollStrategy,\n} from './scroll/index';\n\n\n/** Default set of positions for the overlay. Follows the behavior of a dropdown. */\nconst defaultPositionList: ConnectedPosition[] = [\n  {\n    originX: 'start',\n    originY: 'bottom',\n    overlayX: 'start',\n    overlayY: 'top'\n  },\n  {\n    originX: 'start',\n    originY: 'top',\n    overlayX: 'start',\n    overlayY: 'bottom'\n  },\n  {\n    originX: 'end',\n    originY: 'top',\n    overlayX: 'end',\n    overlayY: 'bottom'\n  },\n  {\n    originX: 'end',\n    originY: 'bottom',\n    overlayX: 'end',\n    overlayY: 'top'\n  }\n];\n\n/** Injection token that determines the scroll handling while the connected overlay is open. */\nexport const CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY =\n    new InjectionToken<() => ScrollStrategy>('cdk-connected-overlay-scroll-strategy');\n\n/** @docs-private @deprecated @breaking-change 8.0.0 */\nexport function CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_FACTORY(overlay: Overlay):\n  () => ScrollStrategy {\n  return (config?: RepositionScrollStrategyConfig) => overlay.scrollStrategies.reposition(config);\n}\n\n/**\n * Directive applied to an element to make it usable as an origin for an Overlay using a\n * ConnectedPositionStrategy.\n */\n@Directive({\n  selector: '[cdk-overlay-origin], [overlay-origin], [cdkOverlayOrigin]',\n  exportAs: 'cdkOverlayOrigin',\n})\nexport class CdkOverlayOrigin {\n  constructor(\n      /** Reference to the element on which the directive is applied. */\n      public elementRef: ElementRef) { }\n}\n\n\n/**\n * Directive to facilitate declarative creation of an\n * Overlay using a FlexibleConnectedPositionStrategy.\n */\n@Directive({\n  selector: '[cdk-connected-overlay], [connected-overlay], [cdkConnectedOverlay]',\n  exportAs: 'cdkConnectedOverlay'\n})\nexport class CdkConnectedOverlay implements OnDestroy, OnChanges {\n  private _overlayRef: OverlayRef;\n  private _templatePortal: TemplatePortal;\n  private _hasBackdrop = false;\n  private _lockPosition = false;\n  private _growAfterOpen = false;\n  private _flexibleDimensions = false;\n  private _push = false;\n  private _backdropSubscription = Subscription.EMPTY;\n  private _offsetX: number;\n  private _offsetY: number;\n  private _position: FlexibleConnectedPositionStrategy;\n  private _scrollStrategyFactory: () => ScrollStrategy;\n\n  /** Origin for the connected overlay. */\n  @Input('cdkConnectedOverlayOrigin') origin: CdkOverlayOrigin;\n\n  /** Registered connected position pairs. */\n  @Input('cdkConnectedOverlayPositions') positions: ConnectedPosition[];\n\n  /**\n   * This input overrides the positions input if specified. It lets users pass\n   * in arbitrary positioning strategies.\n   */\n  @Input('cdkConnectedOverlayPositionStrategy') positionStrategy: FlexibleConnectedPositionStrategy;\n\n  /** The offset in pixels for the overlay connection point on the x-axis */\n  @Input('cdkConnectedOverlayOffsetX')\n  get offsetX(): number { return this._offsetX; }\n  set offsetX(offsetX: number) {\n    this._offsetX = offsetX;\n\n    if (this._position) {\n      this._updatePositionStrategy(this._position);\n    }\n  }\n\n  /** The offset in pixels for the overlay connection point on the y-axis */\n  @Input('cdkConnectedOverlayOffsetY')\n  get offsetY() { return this._offsetY; }\n  set offsetY(offsetY: number) {\n    this._offsetY = offsetY;\n\n    if (this._position) {\n      this._updatePositionStrategy(this._position);\n    }\n  }\n\n  /** The width of the overlay panel. */\n  @Input('cdkConnectedOverlayWidth') width: number | string;\n\n  /** The height of the overlay panel. */\n  @Input('cdkConnectedOverlayHeight') height: number | string;\n\n  /** The min width of the overlay panel. */\n  @Input('cdkConnectedOverlayMinWidth') minWidth: number | string;\n\n  /** The min height of the overlay panel. */\n  @Input('cdkConnectedOverlayMinHeight') minHeight: number | string;\n\n  /** The custom class to be set on the backdrop element. */\n  @Input('cdkConnectedOverlayBackdropClass') backdropClass: string;\n\n  /** The custom class to add to the overlay pane element. */\n  @Input('cdkConnectedOverlayPanelClass') panelClass: string | string[];\n\n  /** Margin between the overlay and the viewport edges. */\n  @Input('cdkConnectedOverlayViewportMargin') viewportMargin: number = 0;\n\n  /** Strategy to be used when handling scroll events while the overlay is open. */\n  @Input('cdkConnectedOverlayScrollStrategy') scrollStrategy: ScrollStrategy;\n\n  /** Whether the overlay is open. */\n  @Input('cdkConnectedOverlayOpen') open: boolean = false;\n\n  /** CSS selector which to set the transform origin. */\n  @Input('cdkConnectedOverlayTransformOriginOn') transformOriginSelector: string;\n\n  /** Whether or not the overlay should attach a backdrop. */\n  @Input('cdkConnectedOverlayHasBackdrop')\n  get hasBackdrop() { return this._hasBackdrop; }\n  set hasBackdrop(value: any) { this._hasBackdrop = coerceBooleanProperty(value); }\n\n  /** Whether or not the overlay should be locked when scrolling. */\n  @Input('cdkConnectedOverlayLockPosition')\n  get lockPosition() { return this._lockPosition; }\n  set lockPosition(value: any) { this._lockPosition = coerceBooleanProperty(value); }\n\n  /** Whether the overlay's width and height can be constrained to fit within the viewport. */\n  @Input('cdkConnectedOverlayFlexibleDimensions')\n  get flexibleDimensions() { return this._flexibleDimensions; }\n  set flexibleDimensions(value: boolean) {\n    this._flexibleDimensions = coerceBooleanProperty(value);\n  }\n\n  /** Whether the overlay can grow after the initial open when flexible positioning is turned on. */\n  @Input('cdkConnectedOverlayGrowAfterOpen')\n  get growAfterOpen() { return this._growAfterOpen; }\n  set growAfterOpen(value: boolean) { this._growAfterOpen = coerceBooleanProperty(value); }\n\n  /** Whether the overlay can be pushed on-screen if none of the provided positions fit. */\n  @Input('cdkConnectedOverlayPush')\n  get push() { return this._push; }\n  set push(value: boolean) { this._push = coerceBooleanProperty(value); }\n\n  /** Event emitted when the backdrop is clicked. */\n  @Output() backdropClick = new EventEmitter<MouseEvent>();\n\n  /** Event emitted when the position has changed. */\n  @Output() positionChange = new EventEmitter<ConnectedOverlayPositionChange>();\n\n  /** Event emitted when the overlay has been attached. */\n  @Output() attach = new EventEmitter<void>();\n\n  /** Event emitted when the overlay has been detached. */\n  @Output() detach = new EventEmitter<void>();\n\n  /** Emits when there are keyboard events that are targeted at the overlay. */\n  @Output() overlayKeydown = new EventEmitter<KeyboardEvent>();\n\n  // TODO(jelbourn): inputs for size, scroll behavior, animation, etc.\n\n  constructor(\n      private _overlay: Overlay,\n      templateRef: TemplateRef<any>,\n      viewContainerRef: ViewContainerRef,\n      @Inject(CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY) scrollStrategyFactory: any,\n      @Optional() private _dir: Directionality) {\n    this._templatePortal = new TemplatePortal(templateRef, viewContainerRef);\n    this._scrollStrategyFactory = scrollStrategyFactory;\n    this.scrollStrategy = this._scrollStrategyFactory();\n  }\n\n  /** The associated overlay reference. */\n  get overlayRef(): OverlayRef {\n    return this._overlayRef;\n  }\n\n  /** The element's layout direction. */\n  get dir(): Direction {\n    return this._dir ? this._dir.value : 'ltr';\n  }\n\n  ngOnDestroy() {\n    if (this._overlayRef) {\n      this._overlayRef.dispose();\n    }\n\n    this._backdropSubscription.unsubscribe();\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    if (this._position) {\n      this._updatePositionStrategy(this._position);\n      this._overlayRef.updateSize({\n        width: this.width,\n        minWidth: this.minWidth,\n        height: this.height,\n        minHeight: this.minHeight,\n      });\n\n      if (changes['origin'] && this.open) {\n        this._position.apply();\n      }\n    }\n\n    if (changes['open']) {\n      this.open ? this._attachOverlay() : this._detachOverlay();\n    }\n  }\n\n  /** Creates an overlay */\n  private _createOverlay() {\n    if (!this.positions || !this.positions.length) {\n      this.positions = defaultPositionList;\n    }\n\n    this._overlayRef = this._overlay.create(this._buildConfig());\n\n    this._overlayRef.keydownEvents().subscribe((event: KeyboardEvent) => {\n      this.overlayKeydown.next(event);\n\n      if (event.keyCode === ESCAPE && !hasModifierKey(event)) {\n        event.preventDefault();\n        this._detachOverlay();\n      }\n    });\n  }\n\n  /** Builds the overlay config based on the directive's inputs */\n  private _buildConfig(): OverlayConfig {\n    const positionStrategy = this._position =\n      this.positionStrategy || this._createPositionStrategy();\n    const overlayConfig = new OverlayConfig({\n      direction: this._dir,\n      positionStrategy,\n      scrollStrategy: this.scrollStrategy,\n      hasBackdrop: this.hasBackdrop\n    });\n\n    if (this.width || this.width === 0) {\n      overlayConfig.width = this.width;\n    }\n\n    if (this.height || this.height === 0) {\n      overlayConfig.height = this.height;\n    }\n\n    if (this.minWidth || this.minWidth === 0) {\n      overlayConfig.minWidth = this.minWidth;\n    }\n\n    if (this.minHeight || this.minHeight === 0) {\n      overlayConfig.minHeight = this.minHeight;\n    }\n\n    if (this.backdropClass) {\n      overlayConfig.backdropClass = this.backdropClass;\n    }\n\n    if (this.panelClass) {\n      overlayConfig.panelClass = this.panelClass;\n    }\n\n    return overlayConfig;\n  }\n\n  /** Updates the state of a position strategy, based on the values of the directive inputs. */\n  private _updatePositionStrategy(positionStrategy: FlexibleConnectedPositionStrategy) {\n    const positions: ConnectedPosition[] = this.positions.map(currentPosition => ({\n      originX: currentPosition.originX,\n      originY: currentPosition.originY,\n      overlayX: currentPosition.overlayX,\n      overlayY: currentPosition.overlayY,\n      offsetX: currentPosition.offsetX || this.offsetX,\n      offsetY: currentPosition.offsetY || this.offsetY,\n      panelClass: currentPosition.panelClass || undefined,\n    }));\n\n    return positionStrategy\n      .setOrigin(this.origin.elementRef)\n      .withPositions(positions)\n      .withFlexibleDimensions(this.flexibleDimensions)\n      .withPush(this.push)\n      .withGrowAfterOpen(this.growAfterOpen)\n      .withViewportMargin(this.viewportMargin)\n      .withLockedPosition(this.lockPosition)\n      .withTransformOriginOn(this.transformOriginSelector);\n  }\n\n  /** Returns the position strategy of the overlay to be set on the overlay config */\n  private _createPositionStrategy(): FlexibleConnectedPositionStrategy {\n    const strategy = this._overlay.position().flexibleConnectedTo(this.origin.elementRef);\n\n    this._updatePositionStrategy(strategy);\n    strategy.positionChanges.subscribe(p => this.positionChange.emit(p));\n\n    return strategy;\n  }\n\n  /** Attaches the overlay and subscribes to backdrop clicks if backdrop exists */\n  private _attachOverlay() {\n    if (!this._overlayRef) {\n      this._createOverlay();\n    } else {\n      // Update the overlay size, in case the directive's inputs have changed\n      this._overlayRef.getConfig().hasBackdrop = this.hasBackdrop;\n    }\n\n    if (!this._overlayRef.hasAttached()) {\n      this._overlayRef.attach(this._templatePortal);\n      this.attach.emit();\n    }\n\n    if (this.hasBackdrop) {\n      this._backdropSubscription = this._overlayRef.backdropClick().subscribe(event => {\n        this.backdropClick.emit(event);\n      });\n    } else {\n      this._backdropSubscription.unsubscribe();\n    }\n  }\n\n  /** Detaches the overlay and unsubscribes to backdrop clicks if backdrop exists */\n  private _detachOverlay() {\n    if (this._overlayRef) {\n      this._overlayRef.detach();\n      this.detach.emit();\n    }\n\n    this._backdropSubscription.unsubscribe();\n  }\n\n  static ngAcceptInputType_hasBackdrop: BooleanInput;\n  static ngAcceptInputType_lockPosition: BooleanInput;\n  static ngAcceptInputType_flexibleDimensions: BooleanInput;\n  static ngAcceptInputType_growAfterOpen: BooleanInput;\n  static ngAcceptInputType_push: BooleanInput;\n}\n\n\n/** @docs-private */\nexport function CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay: Overlay):\n    () => RepositionScrollStrategy {\n  return () => overlay.scrollStrategies.reposition();\n}\n\n/** @docs-private */\nexport const CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER = {\n  provide: CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY,\n  deps: [Overlay],\n  useFactory: CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER_FACTORY,\n};\n"]}