ngx-editor
Version:
Rich Text Editor for angular using ProseMirror
217 lines • 25.6 kB
JavaScript
import { Component, HostBinding, HostListener, Input, } from '@angular/core';
import { NodeSelection } from 'prosemirror-state';
import { asyncScheduler, fromEvent } from 'rxjs';
import { throttleTime } from 'rxjs/operators';
import { computePosition, detectOverflow, offset, autoPlacement } from '@floating-ui/dom';
import { NgxEditorError } from 'ngx-editor/utils';
import * as i0 from "@angular/core";
import * as i1 from "../bubble/bubble.component";
import * as i2 from "@angular/common";
export class FloatingMenuComponent {
constructor(el) {
this.el = el;
this.autoPlace = false;
this.posLeft = 0;
this.posTop = 0;
this.showMenu = false;
this.dragging = false;
}
get display() {
return {
visibility: this.showMenu ? 'visible' : 'hidden',
opacity: this.showMenu ? '1' : '0',
top: `${this.posTop}px`,
left: `${this.posLeft}px`,
};
}
get view() {
return this.editor.view;
}
onMouseDown(e) {
const target = e.target;
if (this.el.nativeElement.contains(target) && target.nodeName !== 'INPUT') {
e.preventDefault();
return;
}
this.dragging = true;
}
onKeyDown(e) {
const target = e.target;
if (target.nodeName === 'INPUT') {
return;
}
this.dragging = true;
this.hide();
}
onMouseUp(e) {
const target = e.target;
if (this.el.nativeElement.contains(target) || target.nodeName === 'INPUT') {
e.preventDefault();
return;
}
this.dragging = false;
this.useUpdate();
}
onKeyUp(e) {
const target = e.target;
if (target.nodeName === 'INPUT') {
return;
}
this.dragging = false;
this.useUpdate();
}
useUpdate() {
if (!this.view) {
return;
}
this.update(this.view);
}
hide() {
this.showMenu = false;
}
show() {
this.showMenu = true;
}
async calculateBubblePosition(view) {
const { state: { selection } } = view;
const { from, to } = selection;
const start = view.coordsAtPos(from);
const end = view.coordsAtPos(to);
const selectionElement = {
getBoundingClientRect() {
if (selection instanceof NodeSelection) {
const node = view.nodeDOM(from);
return node.getBoundingClientRect();
}
const { top, left } = start;
const { bottom, right } = end;
return {
x: left,
y: top,
top,
bottom,
left,
right,
width: right - left,
height: bottom - top,
};
},
};
// the floating bubble itself
const bubbleEl = this.el.nativeElement;
const { x: left, y: top } = await computePosition(selectionElement, bubbleEl, {
placement: 'top',
middleware: [
offset(5),
this.autoPlace && autoPlacement({
boundary: view.dom,
padding: 5,
allowedPlacements: ['top', 'bottom'],
}),
{
// prevent overflow on right and left side
// since only top and bottom placements are allowed
// autoplacement can't handle overflows on the right and left
name: 'overflowMiddleware',
async fn(middlewareArgs) {
const overflow = await detectOverflow(middlewareArgs, {
boundary: view.dom,
padding: 5,
});
// overflows left
if (overflow.left > 0) {
return {
x: middlewareArgs.x + overflow.left,
};
}
// overflows right
if (overflow.right > 0) {
return {
x: middlewareArgs.x - overflow.right,
};
}
return {};
},
},
].filter(Boolean),
});
return {
left,
top,
};
}
canShowMenu(view) {
const { state } = view;
const { selection } = state;
const { empty } = selection;
if (selection instanceof NodeSelection) {
if (selection.node.type.name === 'image') {
return false;
}
}
const hasFocus = this.view.hasFocus();
if (!hasFocus || empty || this.dragging) {
this.hide();
return false;
}
return true;
}
update(view) {
const canShowMenu = this.canShowMenu(view);
if (!canShowMenu) {
this.hide();
return;
}
this.calculateBubblePosition(this.view).then(({ top, left }) => {
if (!this.canShowMenu) {
this.hide();
return;
}
this.posLeft = left;
this.posTop = top;
this.show();
});
}
ngOnInit() {
if (!this.editor) {
throw new NgxEditorError('Required editor instance to initialize floating menu component');
}
this.updateSubscription = this.editor.update
.subscribe((view) => {
this.update(view);
});
this.resizeSubscription = fromEvent(window, 'resize').pipe(throttleTime(500, asyncScheduler, { leading: true, trailing: true })).subscribe(() => {
this.useUpdate();
});
}
ngOnDestroy() {
this.updateSubscription.unsubscribe();
this.resizeSubscription.unsubscribe();
}
}
FloatingMenuComponent.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.2.7", ngImport: i0, type: FloatingMenuComponent, deps: [{ token: i0.ElementRef }], target: i0.ɵɵFactoryTarget.Component });
FloatingMenuComponent.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "12.0.0", version: "13.2.7", type: FloatingMenuComponent, selector: "ngx-editor-floating-menu", inputs: { editor: "editor", autoPlace: "autoPlace" }, host: { listeners: { "document:mousedown": "onMouseDown($event)", "document:keydown": "onKeyDown($event)", "document:mouseup": "onMouseUp($event)", "document:keyup": "onKeyUp($event)" }, properties: { "style": "this.display" } }, ngImport: i0, template: "<div #ref>\n <ng-content></ng-content>\n</div>\n<ng-container *ngIf=\"ref.children.length === 0\">\n <ngx-bubble [editor]=\"editor\"></ngx-bubble>\n</ng-container>\n", styles: ["*,*:before,*:after{box-sizing:border-box}:host{position:absolute;z-index:20;margin-bottom:5px;visibility:hidden;opacity:0}\n"], components: [{ type: i1.BubbleComponent, selector: "ngx-bubble", inputs: ["editor"] }], directives: [{ type: i2.NgIf, selector: "[ngIf]", inputs: ["ngIf", "ngIfThen", "ngIfElse"] }] });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.2.7", ngImport: i0, type: FloatingMenuComponent, decorators: [{
type: Component,
args: [{ selector: 'ngx-editor-floating-menu', template: "<div #ref>\n <ng-content></ng-content>\n</div>\n<ng-container *ngIf=\"ref.children.length === 0\">\n <ngx-bubble [editor]=\"editor\"></ngx-bubble>\n</ng-container>\n", styles: ["*,*:before,*:after{box-sizing:border-box}:host{position:absolute;z-index:20;margin-bottom:5px;visibility:hidden;opacity:0}\n"] }]
}], ctorParameters: function () { return [{ type: i0.ElementRef }]; }, propDecorators: { display: [{
type: HostBinding,
args: ['style']
}], editor: [{
type: Input
}], autoPlace: [{
type: Input
}], onMouseDown: [{
type: HostListener,
args: ['document:mousedown', ['$event']]
}], onKeyDown: [{
type: HostListener,
args: ['document:keydown', ['$event']]
}], onMouseUp: [{
type: HostListener,
args: ['document:mouseup', ['$event']]
}], onKeyUp: [{
type: HostListener,
args: ['document:keyup', ['$event']]
}] } });
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{\n  Component, ElementRef, HostBinding,\n  HostListener, Input, OnDestroy, OnInit,\n} from '@angular/core';\nimport { NodeSelection } from 'prosemirror-state';\nimport { EditorView } from 'prosemirror-view';\nimport { asyncScheduler, fromEvent, Subscription } from 'rxjs';\nimport { throttleTime } from 'rxjs/operators';\nimport type { VirtualElement } from '@floating-ui/core';\nimport { computePosition, detectOverflow, offset, autoPlacement } from '@floating-ui/dom';\n\nimport { NgxEditorError } from 'ngx-editor/utils';\nimport Editor from '../../../Editor';\n\ninterface BubblePosition {\n  top: number;\n  left: number;\n}\n\n@Component({\n  selector: 'ngx-editor-floating-menu',\n  templateUrl: './floating-menu.component.html',\n  styleUrls: ['./floating-menu.component.scss'],\n})\nexport class FloatingMenuComponent implements OnInit, OnDestroy {\n  constructor(public el: ElementRef<HTMLElement>) { }\n\n  @HostBinding('style') get display(): Partial<CSSStyleDeclaration> {\n    return {\n      visibility: this.showMenu ? 'visible' : 'hidden',\n      opacity: this.showMenu ? '1' : '0',\n      top: `${this.posTop}px`,\n      left: `${this.posLeft}px`,\n    };\n  }\n\n  private get view(): EditorView {\n    return this.editor.view;\n  }\n\n  @Input() editor: Editor;\n  @Input() autoPlace = false;\n\n  private posLeft = 0;\n  private posTop = 0;\n  private showMenu = false;\n  private updateSubscription: Subscription;\n  private dragging = false;\n  private resizeSubscription: Subscription;\n\n  @HostListener('document:mousedown', ['$event']) onMouseDown(e: MouseEvent): void {\n    const target = e.target as Node;\n\n    if (this.el.nativeElement.contains(target) && target.nodeName !== 'INPUT') {\n      e.preventDefault();\n      return;\n    }\n\n    this.dragging = true;\n  }\n\n  @HostListener('document:keydown', ['$event']) onKeyDown(e: KeyboardEvent): void {\n    const target = e.target as Node;\n\n    if (target.nodeName === 'INPUT') {\n      return;\n    }\n\n    this.dragging = true;\n    this.hide();\n  }\n\n  @HostListener('document:mouseup', ['$event']) onMouseUp(e: MouseEvent): void {\n    const target = e.target as Node;\n\n    if (this.el.nativeElement.contains(target) || target.nodeName === 'INPUT') {\n      e.preventDefault();\n      return;\n    }\n\n    this.dragging = false;\n    this.useUpdate();\n  }\n\n  @HostListener('document:keyup', ['$event']) onKeyUp(e: KeyboardEvent): void {\n    const target = e.target as Node;\n\n    if (target.nodeName === 'INPUT') {\n      return;\n    }\n\n    this.dragging = false;\n    this.useUpdate();\n  }\n\n  private useUpdate(): void {\n    if (!this.view) {\n      return;\n    }\n\n    this.update(this.view);\n  }\n\n  private hide(): void {\n    this.showMenu = false;\n  }\n\n  private show(): void {\n    this.showMenu = true;\n  }\n\n  private async calculateBubblePosition(view: EditorView): Promise<BubblePosition> {\n    const { state: { selection } } = view;\n    const { from, to } = selection;\n\n    const start = view.coordsAtPos(from);\n    const end = view.coordsAtPos(to);\n\n    const selectionElement: VirtualElement = {\n      getBoundingClientRect() {\n        if (selection instanceof NodeSelection) {\n          const node = view.nodeDOM(from) as HTMLElement;\n          return node.getBoundingClientRect();\n        }\n\n        const { top, left } = start;\n        const { bottom, right } = end;\n\n        return {\n          x: left,\n          y: top,\n          top,\n          bottom,\n          left,\n          right,\n          width: right - left,\n          height: bottom - top,\n        };\n      },\n    };\n\n    // the floating bubble itself\n    const bubbleEl = this.el.nativeElement;\n\n    const { x: left, y: top } = await computePosition(selectionElement, bubbleEl, {\n      placement: 'top',\n      middleware: [\n        offset(5),\n        this.autoPlace && autoPlacement({\n          boundary: view.dom,\n          padding: 5,\n          allowedPlacements: ['top', 'bottom'],\n        }),\n        {\n          // prevent overflow on right and left side\n          // since only top and bottom placements are allowed\n          // autoplacement can't handle overflows on the right and left\n          name: 'overflowMiddleware',\n          async fn(middlewareArgs) {\n            const overflow = await detectOverflow(middlewareArgs, {\n              boundary: view.dom,\n              padding: 5,\n            });\n\n            // overflows left\n            if (overflow.left > 0) {\n              return {\n                x: middlewareArgs.x + overflow.left,\n              };\n            }\n\n            // overflows right\n            if (overflow.right > 0) {\n              return {\n                x: middlewareArgs.x - overflow.right,\n              };\n            }\n\n            return {};\n          },\n        },\n      ].filter(Boolean),\n    });\n\n    return {\n      left,\n      top,\n    };\n  }\n\n  private canShowMenu(view: EditorView): Boolean {\n    const { state } = view;\n    const { selection } = state;\n    const { empty } = selection;\n\n    if (selection instanceof NodeSelection) {\n      if (selection.node.type.name === 'image') {\n        return false;\n      }\n    }\n\n    const hasFocus = this.view.hasFocus();\n\n    if (!hasFocus || empty || this.dragging) {\n      this.hide();\n      return false;\n    }\n\n    return true;\n  }\n\n  private update(view: EditorView): void {\n    const canShowMenu = this.canShowMenu(view);\n\n    if (!canShowMenu) {\n      this.hide();\n      return;\n    }\n\n    this.calculateBubblePosition(this.view).then(({ top, left }) => {\n      if (!this.canShowMenu) {\n        this.hide();\n        return;\n      }\n\n      this.posLeft = left;\n      this.posTop = top;\n\n      this.show();\n    });\n  }\n\n  ngOnInit(): void {\n    if (!this.editor) {\n      throw new NgxEditorError('Required editor instance to initialize floating menu component');\n    }\n\n    this.updateSubscription = this.editor.update\n      .subscribe((view) => {\n        this.update(view);\n      });\n\n    this.resizeSubscription = fromEvent(window, 'resize').pipe(\n      throttleTime(500, asyncScheduler, { leading: true, trailing: true }),\n    ).subscribe(() => {\n      this.useUpdate();\n    });\n  }\n\n  ngOnDestroy(): void {\n    this.updateSubscription.unsubscribe();\n    this.resizeSubscription.unsubscribe();\n  }\n}\n","<div #ref>\n  <ng-content></ng-content>\n</div>\n<ng-container *ngIf=\"ref.children.length === 0\">\n  <ngx-bubble [editor]=\"editor\"></ngx-bubble>\n</ng-container>\n"]}