@hoso/ngx-contextmenu
Version:
An Angular component to show a context menu on an arbitrary component
164 lines • 28.9 kB
JavaScript
import { Overlay, ScrollStrategyOptions } from '@angular/cdk/overlay';
import { ComponentPortal } from '@angular/cdk/portal';
import { Injectable, ElementRef } from '@angular/core';
import { Subject, Subscription } from 'rxjs';
import { ContextMenuContentComponent } from './contextMenuContent.component';
export class ContextMenuService {
constructor(overlay, scrollStrategy) {
this.overlay = overlay;
this.scrollStrategy = scrollStrategy;
this.isDestroyingLeafMenu = false;
this.show = new Subject();
this.triggerClose = new Subject();
this.close = new Subject();
this.overlays = [];
this.fakeElement = {
getBoundingClientRect: () => ({
bottom: 0,
height: 0,
left: 0,
right: 0,
top: 0,
width: 0,
})
};
}
openContextMenu(context) {
const { anchorElement, event, parentContextMenu } = context;
if (!parentContextMenu) {
const mouseEvent = event;
this.fakeElement.getBoundingClientRect = () => ({
bottom: mouseEvent.clientY,
height: 0,
left: mouseEvent.clientX,
right: mouseEvent.clientX,
top: mouseEvent.clientY,
width: 0,
});
this.closeAllContextMenus({ eventType: 'cancel', event });
const positionStrategy = this.overlay.position().connectedTo(new ElementRef(anchorElement || this.fakeElement), { originX: 'start', originY: 'bottom' }, { overlayX: 'start', overlayY: 'top' })
.withFallbackPosition({ originX: 'start', originY: 'top' }, { overlayX: 'start', overlayY: 'bottom' })
.withFallbackPosition({ originX: 'end', originY: 'top' }, { overlayX: 'start', overlayY: 'top' })
.withFallbackPosition({ originX: 'start', originY: 'top' }, { overlayX: 'end', overlayY: 'top' })
.withFallbackPosition({ originX: 'end', originY: 'center' }, { overlayX: 'start', overlayY: 'center' })
.withFallbackPosition({ originX: 'start', originY: 'center' }, { overlayX: 'end', overlayY: 'center' });
this.overlays = [this.overlay.create({
positionStrategy,
panelClass: 'ngx-contextmenu',
scrollStrategy: this.scrollStrategy.close(),
})];
this.attachContextMenu(this.overlays[0], context);
}
else {
const positionStrategy = this.overlay.position().connectedTo(new ElementRef(event ? event.target : anchorElement), { originX: 'end', originY: 'top' }, { overlayX: 'start', overlayY: 'top' })
.withFallbackPosition({ originX: 'start', originY: 'top' }, { overlayX: 'end', overlayY: 'top' })
.withFallbackPosition({ originX: 'end', originY: 'bottom' }, { overlayX: 'start', overlayY: 'bottom' })
.withFallbackPosition({ originX: 'start', originY: 'bottom' }, { overlayX: 'end', overlayY: 'bottom' });
const newOverlay = this.overlay.create({
positionStrategy,
panelClass: 'ngx-contextmenu',
scrollStrategy: this.scrollStrategy.close(),
});
this.destroySubMenus(parentContextMenu);
this.overlays = this.overlays.concat(newOverlay);
this.attachContextMenu(newOverlay, context);
}
}
attachContextMenu(overlay, context) {
const { event, item, menuItems, menuClass } = context;
const contextMenuContent = overlay.attach(new ComponentPortal(ContextMenuContentComponent));
contextMenuContent.instance.event = event;
contextMenuContent.instance.item = item;
contextMenuContent.instance.menuItems = menuItems;
contextMenuContent.instance.overlay = overlay;
contextMenuContent.instance.isLeaf = true;
contextMenuContent.instance.menuClass = menuClass;
overlay.contextMenu = contextMenuContent.instance;
const subscriptions = new Subscription();
subscriptions.add(contextMenuContent.instance.execute.asObservable()
.subscribe((executeEvent) => this.closeAllContextMenus(Object.assign({ eventType: 'execute' }, executeEvent))));
subscriptions.add(contextMenuContent.instance.closeAllMenus.asObservable()
.subscribe((closeAllEvent) => this.closeAllContextMenus(Object.assign({ eventType: 'cancel' }, closeAllEvent))));
subscriptions.add(contextMenuContent.instance.closeLeafMenu.asObservable()
.subscribe(closeLeafMenuEvent => this.destroyLeafMenu(closeLeafMenuEvent)));
subscriptions.add(contextMenuContent.instance.openSubMenu.asObservable()
.subscribe((subMenuEvent) => {
this.destroySubMenus(contextMenuContent.instance);
if (!subMenuEvent.contextMenu) {
contextMenuContent.instance.isLeaf = true;
return;
}
contextMenuContent.instance.isLeaf = false;
this.show.next(subMenuEvent);
}));
contextMenuContent.onDestroy(() => {
menuItems.forEach(menuItem => menuItem.isActive = false);
subscriptions.unsubscribe();
});
contextMenuContent.changeDetectorRef.detectChanges();
}
closeAllContextMenus(closeEvent) {
if (this.overlays) {
this.close.next(closeEvent);
this.overlays.forEach((overlay, index) => {
overlay.detach();
overlay.dispose();
});
}
this.overlays = [];
}
getLastAttachedOverlay() {
let overlay = this.overlays[this.overlays.length - 1];
while (this.overlays.length > 1 && overlay && !overlay.hasAttached()) {
overlay.detach();
overlay.dispose();
this.overlays = this.overlays.slice(0, -1);
overlay = this.overlays[this.overlays.length - 1];
}
return overlay;
}
destroyLeafMenu({ exceptRootMenu, event } = {}) {
if (this.isDestroyingLeafMenu) {
return;
}
this.isDestroyingLeafMenu = true;
setTimeout(() => {
const overlay = this.getLastAttachedOverlay();
if (this.overlays.length > 1 && overlay) {
overlay.detach();
overlay.dispose();
}
if (!exceptRootMenu && this.overlays.length > 0 && overlay) {
this.close.next({ eventType: 'cancel', event });
overlay.detach();
overlay.dispose();
}
const newLeaf = this.getLastAttachedOverlay();
if (newLeaf) {
newLeaf.contextMenu.isLeaf = true;
}
this.isDestroyingLeafMenu = false;
});
}
destroySubMenus(contextMenu) {
const overlay = contextMenu.overlay;
const index = this.overlays.indexOf(overlay);
this.overlays.slice(index + 1).forEach(subMenuOverlay => {
subMenuOverlay.detach();
subMenuOverlay.dispose();
});
}
isLeafMenu(contextMenuContent) {
const overlay = this.getLastAttachedOverlay();
return contextMenuContent.overlay === overlay;
}
}
ContextMenuService.decorators = [
{ type: Injectable }
];
/** @nocollapse */
ContextMenuService.ctorParameters = () => [
{ type: Overlay },
{ type: ScrollStrategyOptions }
];
//# 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{ Overlay, OverlayRef, ScrollStrategyOptions } from '@angular/cdk/overlay';\nimport { ComponentPortal } from '@angular/cdk/portal';\nimport { ComponentRef, Injectable, ElementRef } from '@angular/core';\nimport { Subject, Subscription } from 'rxjs';\n\nimport { ContextMenuComponent } from './contextMenu.component';\nimport { ContextMenuItemDirective } from './contextMenu.item.directive';\nimport { ContextMenuContentComponent } from './contextMenuContent.component';\n\nexport interface IContextMenuClickEvent {\n  anchorElement?: Element | EventTarget;\n  contextMenu?: ContextMenuComponent;\n  event?: MouseEvent | KeyboardEvent;\n  parentContextMenu?: ContextMenuContentComponent;\n  item: any;\n  activeMenuItemIndex?: number;\n}\nexport interface IContextMenuContext extends IContextMenuClickEvent {\n  menuItems: ContextMenuItemDirective[];\n  menuClass: string;\n}\nexport interface CloseLeafMenuEvent {\n  exceptRootMenu?: boolean;\n  event?: MouseEvent | KeyboardEvent;\n}\nexport interface OverlayRefWithContextMenu extends OverlayRef {\n  contextMenu?: ContextMenuContentComponent;\n}\n\nexport interface CancelContextMenuEvent {\n  eventType: 'cancel';\n  event?: MouseEvent | KeyboardEvent;\n}\nexport interface ExecuteContextMenuEvent {\n  eventType: 'execute';\n  event?: MouseEvent | KeyboardEvent;\n  item: any;\n  menuItem: ContextMenuItemDirective;\n}\nexport type CloseContextMenuEvent = ExecuteContextMenuEvent | CancelContextMenuEvent;\n\n@Injectable()\nexport class ContextMenuService {\n  public isDestroyingLeafMenu = false;\n\n  public show: Subject<IContextMenuClickEvent> = new Subject<IContextMenuClickEvent>();\n  public triggerClose: Subject<ContextMenuContentComponent> = new Subject();\n  public close: Subject<CloseContextMenuEvent> = new Subject();\n\n  private contextMenuContent: ComponentRef<ContextMenuContentComponent>;\n  private overlays: OverlayRef[] = [];\n  private fakeElement: any = {\n    getBoundingClientRect: (): ClientRect => ({\n      bottom: 0,\n      height: 0,\n      left: 0,\n      right: 0,\n      top: 0,\n      width: 0,\n    })\n  };\n\n  constructor(\n    private overlay: Overlay,\n    private scrollStrategy: ScrollStrategyOptions,\n  ) { }\n\n  public openContextMenu(context: IContextMenuContext) {\n    const { anchorElement, event, parentContextMenu } = context;\n\n    if (!parentContextMenu) {\n      const mouseEvent = event as MouseEvent;\n      this.fakeElement.getBoundingClientRect = (): ClientRect => ({\n        bottom: mouseEvent.clientY,\n        height: 0,\n        left: mouseEvent.clientX,\n        right: mouseEvent.clientX,\n        top: mouseEvent.clientY,\n        width: 0,\n      });\n      this.closeAllContextMenus({ eventType: 'cancel', event });\n      const positionStrategy = this.overlay.position().connectedTo(\n        new ElementRef(anchorElement || this.fakeElement),\n        { originX: 'start', originY: 'bottom' },\n        { overlayX: 'start', overlayY: 'top' })\n        .withFallbackPosition(\n        { originX: 'start', originY: 'top' },\n        { overlayX: 'start', overlayY: 'bottom' })\n        .withFallbackPosition(\n        { originX: 'end', originY: 'top' },\n        { overlayX: 'start', overlayY: 'top' })\n        .withFallbackPosition(\n        { originX: 'start', originY: 'top' },\n        { overlayX: 'end', overlayY: 'top' })\n        .withFallbackPosition(\n        { originX: 'end', originY: 'center' },\n        { overlayX: 'start', overlayY: 'center' })\n        .withFallbackPosition(\n        { originX: 'start', originY: 'center' },\n        { overlayX: 'end', overlayY: 'center' })\n        ;\n      this.overlays = [this.overlay.create({\n        positionStrategy,\n        panelClass: 'ngx-contextmenu',\n        scrollStrategy: this.scrollStrategy.close(),\n      })];\n      this.attachContextMenu(this.overlays[0], context);\n    } else {\n      const positionStrategy = this.overlay.position().connectedTo(\n        new ElementRef(event ? event.target : anchorElement),\n        { originX: 'end', originY: 'top' },\n        { overlayX: 'start', overlayY: 'top' })\n        .withFallbackPosition(\n        { originX: 'start', originY: 'top' },\n        { overlayX: 'end', overlayY: 'top' })\n        .withFallbackPosition(\n        { originX: 'end', originY: 'bottom' },\n        { overlayX: 'start', overlayY: 'bottom' })\n        .withFallbackPosition(\n        { originX: 'start', originY: 'bottom' },\n        { overlayX: 'end', overlayY: 'bottom' })\n        ;\n      const newOverlay = this.overlay.create({\n        positionStrategy,\n        panelClass: 'ngx-contextmenu',\n        scrollStrategy: this.scrollStrategy.close(),\n      });\n      this.destroySubMenus(parentContextMenu);\n      this.overlays = this.overlays.concat(newOverlay);\n      this.attachContextMenu(newOverlay, context);\n    }\n  }\n\n  public attachContextMenu(overlay: OverlayRef, context: IContextMenuContext): void {\n    const { event, item, menuItems, menuClass } = context;\n\n    const contextMenuContent: ComponentRef<ContextMenuContentComponent> = overlay.attach(new ComponentPortal(ContextMenuContentComponent));\n    contextMenuContent.instance.event = event;\n    contextMenuContent.instance.item = item;\n    contextMenuContent.instance.menuItems = menuItems;\n    contextMenuContent.instance.overlay = overlay;\n    contextMenuContent.instance.isLeaf = true;\n    contextMenuContent.instance.menuClass = menuClass;\n    (<OverlayRefWithContextMenu>overlay).contextMenu = contextMenuContent.instance;\n\n    const subscriptions: Subscription = new Subscription();\n    subscriptions.add(contextMenuContent.instance.execute.asObservable()\n      .subscribe((executeEvent) => this.closeAllContextMenus({ eventType: 'execute', ...executeEvent })));\n    subscriptions.add(contextMenuContent.instance.closeAllMenus.asObservable()\n      .subscribe((closeAllEvent) => this.closeAllContextMenus({ eventType: 'cancel', ...closeAllEvent })));\n    subscriptions.add(contextMenuContent.instance.closeLeafMenu.asObservable()\n      .subscribe(closeLeafMenuEvent => this.destroyLeafMenu(closeLeafMenuEvent)));\n    subscriptions.add(contextMenuContent.instance.openSubMenu.asObservable()\n      .subscribe((subMenuEvent: IContextMenuContext) => {\n        this.destroySubMenus(contextMenuContent.instance);\n        if (!subMenuEvent.contextMenu) {\n          contextMenuContent.instance.isLeaf = true;\n          return;\n        }\n        contextMenuContent.instance.isLeaf = false;\n        this.show.next(subMenuEvent);\n      }));\n    contextMenuContent.onDestroy(() => {\n      menuItems.forEach(menuItem => menuItem.isActive = false);\n      subscriptions.unsubscribe();\n    });\n    contextMenuContent.changeDetectorRef.detectChanges();\n  }\n\n  public closeAllContextMenus(closeEvent: CloseContextMenuEvent): void {\n    if (this.overlays) {\n      this.close.next(closeEvent);\n      this.overlays.forEach((overlay, index) => {\n        overlay.detach();\n        overlay.dispose();\n      });\n    }\n    this.overlays = [];\n  }\n\n  public getLastAttachedOverlay(): OverlayRefWithContextMenu {\n    let overlay: OverlayRef = this.overlays[this.overlays.length - 1];\n    while (this.overlays.length > 1 && overlay && !overlay.hasAttached()) {\n      overlay.detach();\n      overlay.dispose();\n      this.overlays = this.overlays.slice(0, -1);\n      overlay = this.overlays[this.overlays.length - 1];\n    }\n    return overlay;\n  }\n\n  public destroyLeafMenu({ exceptRootMenu, event }: CloseLeafMenuEvent = {}): void {\n    if (this.isDestroyingLeafMenu) {\n      return;\n    }\n    this.isDestroyingLeafMenu = true;\n\n    setTimeout(() => {\n      const overlay = this.getLastAttachedOverlay();\n      if (this.overlays.length > 1 && overlay) {\n        overlay.detach();\n        overlay.dispose();\n      }\n      if (!exceptRootMenu && this.overlays.length > 0 && overlay) {\n        this.close.next({ eventType: 'cancel', event });\n        overlay.detach();\n        overlay.dispose();\n      }\n\n      const newLeaf = this.getLastAttachedOverlay();\n      if (newLeaf) {\n        newLeaf.contextMenu.isLeaf = true;\n      }\n\n      this.isDestroyingLeafMenu = false;\n    });\n  }\n\n  public destroySubMenus(contextMenu: ContextMenuContentComponent): void {\n    const overlay = contextMenu.overlay;\n    const index = this.overlays.indexOf(overlay);\n    this.overlays.slice(index + 1).forEach(subMenuOverlay => {\n      subMenuOverlay.detach();\n      subMenuOverlay.dispose();\n    });\n  }\n\n  public isLeafMenu(contextMenuContent: ContextMenuContentComponent): boolean {\n    const overlay = this.getLastAttachedOverlay();\n    return contextMenuContent.overlay === overlay;\n  }\n}\n"]}