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| /*
* @license
* Copyright Hôpitaux Universitaires de Genève. All Rights Reserved.
*
* Use of this source code is governed by an Apache-2.0 license that can be
* found in the LICENSE file at https://github.com/DSI-HUG/dejajs-components/blob/master/LICENSE
*/
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import {
AfterViewInit,
ChangeDetectionStrategy,
ChangeDetectorRef,
Component,
ElementRef,
EventEmitter,
forwardRef,
Input,
NgZone,
OnChanges,
OnDestroy,
Output,
SimpleChanges,
ViewChild,
ViewEncapsulation
} from '@angular/core';
import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';
import { DejaEditorService } from './deja-editor.service';
declare var CKEDITOR: any;
/**
* CKEditor component
* Usage :
* <ckeditor [(ngModel)]="data" [config]="{...}" debounce="500"></ckeditor>
*/
@Component({
selector: 'deja-editor',
providers: [
{
provide: NG_VALUE_ACCESSOR,
useExisting: forwardRef(() => DejaEditorComponent),
multi: true
}
],
template: require('./deja-editor.component.html'),
styles: [require('./deja-editor.component.scss')],
changeDetection: ChangeDetectionStrategy.OnPush,
encapsulation: ViewEncapsulation.None
})
export class DejaEditorComponent
implements OnChanges, AfterViewInit, OnDestroy, ControlValueAccessor {
@Input() public config: any;
@Input() public debounce: string;
@Output() public change = new EventEmitter();
@Output() public ready = new EventEmitter();
@Output() public blur = new EventEmitter();
@Output() public focus = new EventEmitter();
@Output() public disabled = new EventEmitter<boolean>();
@ViewChild('host') public host: ElementRef;
private _readonly: boolean;
private _inline = true;
@Input()
public set readonly(value: boolean) {
this._readonly = coerceBooleanProperty(value);
}
public get readonly() {
return this._readonly;
}
@Input()
public set inline(value: boolean) {
this._inline = coerceBooleanProperty(value);
}
public get inline() {
return this._inline;
}
private _value = '';
public instance: any;
public debounceTimeout: any;
/**
* Constructor
*/
constructor(
private zone: NgZone,
private _changeDetectorRef: ChangeDetectorRef,
private _initializer: DejaEditorService
) {}
public get value(): any {
return this._value;
}
@Input()
public set value(v) {
if (v !== this._value) {
this._value = v;
this.onChange(v);
}
}
public ngOnChanges(changes: SimpleChanges) {
Iif (changes.readonly && this.instance) {
this.instance.setReadOnly(changes.readonly.currentValue);
}
}
/**
* On component destroy
*/
public ngOnDestroy() {
this.focus.complete();
this.blur.complete();
this.change.complete();
this.ready.complete();
this.disabled.complete();
if (this.instance) {
this.instance.focusManager.blur(true);
try {
// Workaround for a ckEditor bug
this.instance.destroy();
} catch (e) {
console.warn('Error occurred when destroying ckEditor instance');
}
this.instance = null;
}
}
/**
* On component view init
*/
public ngAfterViewInit() {
this._initializer.initDejaEditorLib().then(() => {
this.ckeditorInit(this.config || {});
// Effectively display the editor even if parents component ChangeDetectionStrategy is OnPush
setTimeout(() => this._changeDetectorRef.markForCheck());
});
}
/**
* Value update process
*/
public updateValue(value: any) {
this.zone.run(() => {
if (!value) {
value = null;
}
if (this.value !== value) {
this.value = value;
this.onChange(value);
this.change.emit(value);
}
});
}
public textAreaChange() {
this.zone.run(() => {
const value = this.host.nativeElement.value;
this.onChange(value);
this.change.emit(value);
});
}
/**
* CKEditor init
*/
public ckeditorInit(config: any) {
Iif (typeof CKEDITOR === 'undefined') {
console.warn('CKEditor 4.x is missing (http://ckeditor.com/)');
} else {
// Check textarea exists
Iif (this.instance) {
return;
}
Iif (this.readonly) {
config.readOnly = this.readonly;
}
const keyEvents = config.on && config.on.key;
Eif (!config.on) {
config.on = {};
}
config.on.key = (event: any) => {
// Override CTRL+A event. Native one cause editor switch on first try
if (event.data.keyCode === 1114177) {
// CTRL + A
event.cancel();
event.stop();
this.instance.document.$.execCommand('SelectAll');
}
if (keyEvents) {
keyEvents(event);
}
};
// CKEditor replace textarea
Eif (this.inline) {
this.instance = CKEDITOR.inline(
this.host.nativeElement,
config
);
} else {
this.instance = CKEDITOR.replace(
this.host.nativeElement,
config
);
}
// Set initial value
this.instance.setData(this.value);
// listen for instanceReady event
this.instance.on('instanceReady', (evt: any) => {
// send the evt to the EventEmitter
this.ready.emit(evt);
});
// CKEditor change event
this.instance.on('change', () => {
const value = this.instance.getData();
// Debounce update
if (this.debounce) {
if (this.debounceTimeout) {
clearTimeout(this.debounceTimeout);
}
this.debounceTimeout = setTimeout(() => {
this.updateValue(value);
this.debounceTimeout = null;
}, parseInt(this.debounce, 10));
// Live update
} else {
this.updateValue(value);
}
});
// CKEditor blur event
this.instance.on('blur', (evt: any) => {
this.blur.emit(evt);
this.onTouched();
});
// CKEditor focus event
this.instance.on('focus', (evt: any) => {
if (!this.readonly) {
this.focus.emit(evt);
}
});
}
}
/**
* Implements ControlValueAccessor
*/
public writeValue(value: any) {
this._value = value;
Iif (this.instance) {
this.instance.setData(value);
} else {
this.host.nativeElement.value = value;
}
}
public onChange(_: any) {}
public onTouched() {}
public registerOnChange(fn: any) {
this.onChange = fn;
}
public registerOnTouched(fn: any) {
this.onTouched = fn;
}
public setDisabledState(isDisabled: boolean) {
this.readonly = isDisabled;
this.disabled.next(isDisabled);
if (this.instance) {
this.instance.setReadOnly(isDisabled);
}
}
/**
* Return the word at cursor position.
* - If the cursor is at the end of a word, it return that word.
* - If the cursor is at the begining of a word, it return that word.
* - If the cursor is in the middle of a word, it return that word.
* - If there are no word nearly the cursor, return null
*/
public getWordAtCursor(): string {
const range = this.instance.getSelection().getRanges(true)[0];
const word = this._firstTextNode(range);
return (word && word.toReplace) || null;
}
public hasActiveSelection(): boolean {
return !!this.getSelectedText();
}
public getSelectedText(): string {
const selection = this.instance.getSelection();
return selection.getSelectedText();
}
/**
* Replace the content of the editor.
* - If there is an active selection, replace this selection
* - If the editor is empty, simply insert the text
* - If the cursor is near a word, replace this word with the text
* - If there is no selection, no word near the cursor, simply insert the text at the cursor position
* @param replace the string to replace with
*/
public replace(replace: string): void {
if (!replace) {
return;
}
const selection = this.getSelectedText();
if (selection) {
// Focus is used during the CKEDITOR insertText process and cause deselection of the selected text
// So we temporarily deactivate it
const focus = this.instance.focus;
this.instance.focus = () => {};
this.instance.insertText(replace);
this.instance.focus = focus;
return;
}
const range = this.instance.getSelection().getRanges(true)[0];
if (!range) {
this.instance.insertText(replace);
return;
}
const text = this._firstTextNode(range);
if (text) {
this._replaceWord(text, replace);
} else {
this.instance.insertText(replace);
}
this.setFocus();
}
public setFocus(): void {
if (this.instance) {
this.instance.focus();
} else {
this.host.nativeElement.focus();
}
}
private _hasTextNodeAsChild(node: any, reverse = false): any {
const children: any[] = node.getChildren().toArray();
if (reverse) {
for (let i = children.length - 1; i >= 0; i--) {
const child = children[i];
if (child.type === CKEDITOR.NODE_TEXT) {
return child;
} else {
const inChild = this._hasTextNodeAsChild(child);
if (inChild) {
return inChild;
}
}
}
} else {
for (const child of children) {
if (child.type === CKEDITOR.NODE_TEXT) {
return child;
} else {
const inChild = this._hasTextNodeAsChild(child);
if (inChild) {
return inChild;
}
}
}
}
return null;
}
private _mergeTextNodeAroundWithDirection(
textNode: any,
reverse = false
): void {
const toRemove = [];
let newText = textNode.getText();
let x = textNode;
while ((x = reverse ? x.getPrevious() : x.getNext)) {
if (
x.type !== CKEDITOR.NODE_TEXT ||
x
.getText()
.charAt(reverse ? x.getText().length - 1 : 0)
.match(/[\s,;.:!?]/)
) {
break;
}
if (reverse) {
newText = x.getText() + newText;
} else {
newText += x.getText();
}
toRemove.push(x);
}
if (toRemove.length > 0) {
textNode.setText(newText);
toRemove.forEach(node => node.remove());
}
}
private _mergeTextNodeAround(textNode: any): any {
this._mergeTextNodeAroundWithDirection(textNode, true);
this._mergeTextNodeAroundWithDirection(textNode);
return textNode;
}
private _firstNonEmptyTextNode(node: any, reverse = false): any {
let x = node;
while ((x = reverse ? x.getPrevious() : x.getNext())) {
if (x.type === CKEDITOR.NODE_TEXT) {
if (x.getText() !== '') {
return x;
}
} else {
return x;
}
}
}
private _trim(text: string): string {
if (text) {
text = text.replace(/[\u200b\u00A0]/g, '').trim();
}
return text;
}
private _extractFirstWord(text: string, reverse = false): string {
if (!text) {
return text;
}
if (text.indexOf(' ') !== -1) {
const spaceSplit = text.split(' ');
return this._trim(spaceSplit[reverse ? spaceSplit.length - 1 : 0]);
} else {
return this._trim(text);
}
}
private _firstTextNodeResult(
selectedNode: any,
reverse = false,
firstNodeIsText = false
): {
textNode: any;
firstNodeIsText: boolean;
toReplace: string;
} {
if (this._trim(selectedNode.getText())) {
const node = this._mergeTextNodeAround(selectedNode);
return {
textNode: node,
firstNodeIsText: firstNodeIsText,
toReplace: this._extractFirstWord(node.getText(), reverse)
};
}
return null;
}
private _firstTextNodeWithDirection(
range: any,
reverse = false
): {
textNode: any;
firstNodeIsText: boolean;
toReplace: string;
} {
const startContainer: any = range.startContainer;
if (reverse && startContainer.type === CKEDITOR.NODE_TEXT) {
return this._firstTextNodeResult(startContainer, reverse, true);
}
const startNode: any =
startContainer.type === CKEDITOR.NODE_TEXT
? reverse
? this._firstNonEmptyTextNode(startContainer, true)
: this._firstNonEmptyTextNode(startContainer)
: startContainer.getChildren().getItem(range.startOffset - 1);
if (startNode) {
if (startNode.type === CKEDITOR.NODE_TEXT) {
return this._firstTextNodeResult(startNode, reverse);
}
let x = this._hasTextNodeAsChild(startNode, reverse);
if (x) {
return this._firstTextNodeResult(x, reverse);
}
x = startNode;
while ((x = reverse ? x.getPrevious() : x.getNext())) {
if (x.type === CKEDITOR.NODE_TEXT) {
return this._firstTextNodeResult(x, reverse);
}
const textNode = this._hasTextNodeAsChild(x, reverse);
if (textNode) {
return this._firstTextNodeResult(textNode, reverse);
}
}
}
return null;
}
private _firstTextNode(
range: any
): { textNode: any; firstNodeIsText: boolean; toReplace: string } {
let textNode: {
textNode: any;
firstNodeIsText: boolean;
toReplace: string;
} = this._firstTextNodeWithDirection(range, true);
if (!textNode) {
textNode = this._firstTextNodeWithDirection(range);
}
return textNode;
}
private _replaceWord(
node: { textNode: any; firstNodeIsText: boolean; toReplace: string },
replace: string
): void {
const split = node.textNode.getText().split(node.toReplace);
node.textNode.setText(split[0]);
const newElement = CKEDITOR.dom.element.createFromHtml(
`<span>${CKEDITOR.tools.transformPlainTextToHtml(
replace,
CKEDITOR.ENTER_BR
)}</span>`
);
newElement.insertAfter(node.textNode);
if (split.length === 2 && split[1]) {
const end = new CKEDITOR.dom.text(split[1]);
end.insertAfter(newElement);
}
this.instance.getSelection().selectElement(node.textNode);
const tmpRange = this.instance.getSelection().getRanges()[0];
tmpRange.setStartAfter(node.textNode);
tmpRange.select();
}
}
|