Remove JavaScript files

This commit is contained in:
Tony Narlock 2024-03-16 05:01:34 -05:00
parent 9765abc0bd
commit 2825393538
10 changed files with 0 additions and 1202 deletions

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import { Plugin } from 'ckeditor5/src/core';
import { global, logWarning } from 'ckeditor5/src/utils';
import blockAutoformatEditing from '@ckeditor/ckeditor5-autoformat/src/blockautoformatediting';
import Math from './math';
export default class AutoformatMath extends Plugin {
static get requires() {
return [ Math, 'Autoformat' ];
}
/**
* @inheritDoc
*/
init() {
const editor = this.editor;
if ( !editor.plugins.has( 'Math' ) ) {
logWarning( 'autoformat-math-feature-missing', editor );
}
}
afterInit() {
const editor = this.editor;
const command = editor.commands.get( 'math' );
if ( command ) {
const callback = () => {
if ( !command.isEnabled ) {
return false;
}
command.display = true;
// Wait until selection is removed.
global.window.setTimeout(
() => editor.plugins.get( 'MathUI' )._showUI(),
50
);
};
blockAutoformatEditing( editor, this, /^\$\$$/, callback );
blockAutoformatEditing( editor, this, /^\\\[$/, callback );
}
}
static get pluginName() {
return 'AutoformatMath';
}
}

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import { Clipboard } from 'ckeditor5/src/clipboard';
import { Plugin } from 'ckeditor5/src/core';
import { LivePosition, LiveRange } from 'ckeditor5/src/engine';
import { Undo } from 'ckeditor5/src/undo';
import { global } from 'ckeditor5/src/utils';
import { extractDelimiters, hasDelimiters, delimitersCounts } from './utils';
export default class AutoMath extends Plugin {
static get requires() {
return [ Clipboard, Undo ];
}
static get pluginName() {
return 'AutoMath';
}
constructor( editor ) {
super( editor );
this._timeoutId = null;
this._positionToInsert = null;
}
init() {
const editor = this.editor;
const modelDocument = editor.model.document;
this.listenTo( editor.plugins.get( Clipboard ), 'inputTransformation', () => {
const firstRange = modelDocument.selection.getFirstRange();
const leftLivePosition = LivePosition.fromPosition( firstRange.start );
leftLivePosition.stickiness = 'toPrevious';
const rightLivePosition = LivePosition.fromPosition( firstRange.end );
rightLivePosition.stickiness = 'toNext';
modelDocument.once( 'change:data', () => {
this._mathBetweenPositions( leftLivePosition, rightLivePosition );
leftLivePosition.detach();
rightLivePosition.detach();
}, { priority: 'high' } );
} );
editor.commands.get( 'undo' ).on( 'execute', () => {
if ( this._timeoutId ) {
global.window.clearTimeout( this._timeoutId );
this._positionToInsert.detach();
this._timeoutId = null;
this._positionToInsert = null;
}
}, { priority: 'high' } );
}
_mathBetweenPositions( leftPosition, rightPosition ) {
const editor = this.editor;
const mathConfig = this.editor.config.get( 'math' );
const equationRange = new LiveRange( leftPosition, rightPosition );
const walker = equationRange.getWalker( { ignoreElementEnd: true } );
let text = '';
// Get equation text
for ( const node of walker ) {
if ( node.item.is( '$textProxy' ) ) {
text += node.item.data;
}
}
text = text.trim();
// Skip if don't have delimiters
if ( !hasDelimiters( text ) || delimitersCounts( text ) !== 2 ) {
return;
}
const mathCommand = editor.commands.get( 'math' );
// Do not anything if math element cannot be inserted at the current position
if ( !mathCommand.isEnabled ) {
return;
}
this._positionToInsert = LivePosition.fromPosition( leftPosition );
// With timeout user can undo conversation if want use plain text
this._timeoutId = global.window.setTimeout( () => {
editor.model.change( writer => {
this._timeoutId = null;
writer.remove( equationRange );
let insertPosition;
// Check if position where the math element should be inserted is still valid.
if ( this._positionToInsert.root.rootName !== '$graveyard' ) {
insertPosition = this._positionToInsert;
}
editor.model.change( innerWriter => {
const params = Object.assign( extractDelimiters( text ), {
type: mathConfig.outputType
} );
const mathElement = innerWriter.createElement( params.display ? 'mathtex-display' : 'mathtex-inline', params );
editor.model.insertContent( mathElement, insertPosition );
innerWriter.setSelection( mathElement, 'on' );
} );
this._positionToInsert.detach();
this._positionToInsert = null;
} );
}, 100 );
}
}

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/**
* @module math
*/
export { default as Math } from './math';
export { default as AutoformatMath } from './autoformatmath';

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import { Plugin } from 'ckeditor5/src/core';
import { Widget } from 'ckeditor5/src/widget';
import MathUI from './mathui';
import MathEditing from './mathediting';
import AutoMath from './automath';
export default class Math extends Plugin {
static get requires() {
return [ MathEditing, MathUI, AutoMath, Widget ];
}
static get pluginName() {
return 'Math';
}
}

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import { Command } from 'ckeditor5/src/core';
import { getSelectedMathModelWidget } from './utils';
export default class MathCommand extends Command {
execute( equation, display, outputType, forceOutputType ) {
const model = this.editor.model;
const selection = model.document.selection;
const selectedElement = selection.getSelectedElement();
model.change( writer => {
let mathtex;
if ( selectedElement && ( selectedElement.is( 'element', 'mathtex-inline' ) ||
selectedElement.is( 'element', 'mathtex-display' ) ) ) {
// Update selected element
const typeAttr = selectedElement.getAttribute( 'type' );
// Use already set type if found and is not forced
const type = forceOutputType ? outputType : typeAttr || outputType;
mathtex = writer.createElement( display ? 'mathtex-display' : 'mathtex-inline', { equation, type, display } );
} else {
// Create new model element
mathtex = writer.createElement( display ? 'mathtex-display' : 'mathtex-inline', { equation, type: outputType, display } );
}
model.insertContent( mathtex );
} );
}
refresh() {
const model = this.editor.model;
const selection = model.document.selection;
const selectedElement = selection.getSelectedElement();
this.isEnabled = selectedElement === null || ( selectedElement.is( 'element', 'mathtex-inline' ) ||
selectedElement.is( 'element', 'mathtex-display' ) );
const selectedEquation = getSelectedMathModelWidget( selection );
this.value = selectedEquation ? selectedEquation.getAttribute( 'equation' ) : null;
this.display = selectedEquation ? selectedEquation.getAttribute( 'display' ) : null;
}
}

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import MathCommand from './mathcommand';
import { Plugin } from 'ckeditor5/src/core';
import { toWidget, Widget, viewToModelPositionOutsideModelElement } from 'ckeditor5/src/widget';
import { renderEquation, extractDelimiters } from './utils';
export default class MathEditing extends Plugin {
static get requires() {
return [ Widget ];
}
static get pluginName() {
return 'MathEditing';
}
constructor( editor ) {
super( editor );
editor.config.define( 'math', {
engine: 'mathjax',
outputType: 'script',
className: 'math-tex',
forceOutputType: false,
enablePreview: true,
previewClassName: [],
popupClassName: [],
katexRenderOptions: {}
} );
}
init() {
const editor = this.editor;
editor.commands.add( 'math', new MathCommand( editor ) );
this._defineSchema();
this._defineConverters();
editor.editing.mapper.on(
'viewToModelPosition',
viewToModelPositionOutsideModelElement( editor.model, viewElement => viewElement.hasClass( 'math' ) )
);
}
_defineSchema() {
const schema = this.editor.model.schema;
schema.register( 'mathtex-inline', {
allowWhere: '$text',
isInline: true,
isObject: true,
allowAttributes: [ 'equation', 'type', 'display' ]
} );
schema.register( 'mathtex-display', {
allowWhere: '$block',
isInline: false,
isObject: true,
allowAttributes: [ 'equation', 'type', 'display' ]
} );
}
_defineConverters() {
const conversion = this.editor.conversion;
const mathConfig = this.editor.config.get( 'math' );
// View -> Model
conversion.for( 'upcast' )
// MathJax inline way (e.g. <script type="math/tex">\sqrt{\frac{a}{b}}</script>)
.elementToElement( {
view: {
name: 'script',
attributes: {
type: 'math/tex'
}
},
model: ( viewElement, { writer } ) => {
const equation = viewElement.getChild( 0 ).data.trim();
return writer.createElement( 'mathtex-inline', {
equation,
type: mathConfig.forceOutputType ? mathConfig.outputType : 'script',
display: false
} );
}
} )
// MathJax display way (e.g. <script type="math/tex; mode=display">\sqrt{\frac{a}{b}}</script>)
.elementToElement( {
view: {
name: 'script',
attributes: {
type: 'math/tex; mode=display'
}
},
model: ( viewElement, { writer } ) => {
const equation = viewElement.getChild( 0 ).data.trim();
return writer.createElement( 'mathtex-display', {
equation,
type: mathConfig.forceOutputType ? mathConfig.outputType : 'script',
display: true
} );
}
} )
// CKEditor 4 way (e.g. <span class="math-tex">\( \sqrt{\frac{a}{b}} \)</span>)
.elementToElement( {
view: {
name: 'span',
classes: [ mathConfig.className ]
},
model: ( viewElement, { writer } ) => {
const equation = viewElement.getChild( 0 ).data.trim();
const params = Object.assign( extractDelimiters( equation ), {
type: mathConfig.forceOutputType ? mathConfig.outputType : 'span'
} );
return writer.createElement( params.display ? 'mathtex-display' : 'mathtex-inline', params );
}
} )
// KaTeX from Quill: https://github.com/quilljs/quill/blob/develop/formats/formula.js
.elementToElement( {
view: {
name: 'span',
classes: [ 'ql-formula' ]
},
model: ( viewElement, { writer } ) => {
const equation = viewElement.getAttribute( 'data-value' ).trim();
return writer.createElement( 'mathtex-inline', {
equation,
type: mathConfig.forceOutputType ? mathConfig.outputType : 'script',
display: false
} );
}
} );
// Model -> View (element)
conversion.for( 'editingDowncast' )
.elementToElement( {
model: 'mathtex-inline',
view: ( modelItem, { writer } ) => {
const widgetElement = createMathtexEditingView( modelItem, writer );
return toWidget( widgetElement, writer, 'span' );
}
} ).elementToElement( {
model: 'mathtex-display',
view: ( modelItem, { writer } ) => {
const widgetElement = createMathtexEditingView( modelItem, writer );
return toWidget( widgetElement, writer, 'div' );
}
} );
// Model -> Data
conversion.for( 'dataDowncast' )
.elementToElement( {
model: 'mathtex-inline',
view: createMathtexView
} )
.elementToElement( {
model: 'mathtex-display',
view: createMathtexView
} );
// Create view for editor
function createMathtexEditingView( modelItem, writer ) {
const equation = modelItem.getAttribute( 'equation' );
const display = modelItem.getAttribute( 'display' );
const styles = 'user-select: none; ' + ( display ? '' : 'display: inline-block;' );
const classes = 'ck-math-tex ' + ( display ? 'ck-math-tex-display' : 'ck-math-tex-inline' );
const mathtexView = writer.createContainerElement( display ? 'div' : 'span', {
style: styles,
class: classes
} );
const uiElement = writer.createUIElement( 'div', null, function( domDocument ) {
const domElement = this.toDomElement( domDocument );
renderEquation( equation, domElement, mathConfig.engine, mathConfig.lazyLoad, display, false, mathConfig.previewClassName,
null, mathConfig.katexRenderOptions );
return domElement;
} );
writer.insert( writer.createPositionAt( mathtexView, 0 ), uiElement );
return mathtexView;
}
// Create view for data
function createMathtexView( modelItem, { writer } ) {
const equation = modelItem.getAttribute( 'equation' );
const type = modelItem.getAttribute( 'type' );
const display = modelItem.getAttribute( 'display' );
if ( type === 'span' ) {
const mathtexView = writer.createContainerElement( 'span', {
class: mathConfig.className
} );
if ( display ) {
writer.insert( writer.createPositionAt( mathtexView, 0 ), writer.createText( '\\[' + equation + '\\]' ) );
} else {
writer.insert( writer.createPositionAt( mathtexView, 0 ), writer.createText( '\\(' + equation + '\\)' ) );
}
return mathtexView;
} else {
const mathtexView = writer.createContainerElement( 'script', {
type: display ? 'math/tex; mode=display' : 'math/tex'
} );
writer.insert( writer.createPositionAt( mathtexView, 0 ), writer.createText( equation ) );
return mathtexView;
}
}
}
}

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import MathEditing from './mathediting';
import MainFormView from './ui/mainformview';
import mathIcon from '../theme/icons/math.svg';
import { Plugin } from 'ckeditor5/src/core';
import { ClickObserver } from 'ckeditor5/src/engine';
import { ButtonView, ContextualBalloon, clickOutsideHandler } from 'ckeditor5/src/ui';
import { global, uid } from 'ckeditor5/src/utils';
import { getBalloonPositionData } from './utils';
const mathKeystroke = 'Ctrl+M';
export default class MathUI extends Plugin {
static get requires() {
return [ ContextualBalloon, MathEditing ];
}
static get pluginName() {
return 'MathUI';
}
init() {
const editor = this.editor;
editor.editing.view.addObserver( ClickObserver );
this._previewUid = `math-preview-${ uid() }`;
this.formView = this._createFormView();
this._balloon = editor.plugins.get( ContextualBalloon );
this._createToolbarMathButton();
this._enableUserBalloonInteractions();
}
destroy() {
super.destroy();
this.formView.destroy();
// Destroy preview element
const previewEl = global.document.getElementById( this._previewUid );
if ( previewEl ) {
previewEl.parentNode.removeChild( previewEl );
}
}
_showUI() {
const editor = this.editor;
const mathCommand = editor.commands.get( 'math' );
if ( !mathCommand.isEnabled ) {
return;
}
this._addFormView();
this._balloon.showStack( 'main' );
}
_createFormView() {
const editor = this.editor;
const mathCommand = editor.commands.get( 'math' );
const mathConfig = editor.config.get( 'math' );
const formView = new MainFormView(
editor.locale,
mathConfig.engine,
mathConfig.lazyLoad,
mathConfig.enablePreview,
this._previewUid,
mathConfig.previewClassName,
mathConfig.popupClassName,
mathConfig.katexRenderOptions
);
formView.mathInputView.bind( 'value' ).to( mathCommand, 'value' );
formView.displayButtonView.bind( 'isOn' ).to( mathCommand, 'display' );
// Form elements should be read-only when corresponding commands are disabled.
formView.mathInputView.bind( 'isReadOnly' ).to( mathCommand, 'isEnabled', value => !value );
formView.saveButtonView.bind( 'isEnabled' ).to( mathCommand );
formView.displayButtonView.bind( 'isEnabled' ).to( mathCommand );
// Listen to submit button click
this.listenTo( formView, 'submit', () => {
editor.execute( 'math', formView.equation, formView.displayButtonView.isOn, mathConfig.outputType, mathConfig.forceOutputType );
this._closeFormView();
} );
// Listen to cancel button click
this.listenTo( formView, 'cancel', () => {
this._closeFormView();
} );
// Close plugin ui, if esc is pressed (while ui is focused)
formView.keystrokes.set( 'esc', ( data, cancel ) => {
this._closeFormView();
cancel();
} );
return formView;
}
_addFormView() {
if ( this._isFormInPanel ) {
return;
}
const editor = this.editor;
const mathCommand = editor.commands.get( 'math' );
this._balloon.add( {
view: this.formView,
position: getBalloonPositionData( editor )
} );
if ( this._balloon.visibleView === this.formView ) {
this.formView.mathInputView.fieldView.element.select();
}
// Show preview element
const previewEl = global.document.getElementById( this._previewUid );
if ( previewEl && this.formView.previewEnabled ) {
// Force refresh preview
this.formView.mathView.updateMath();
}
this.formView.equation = mathCommand.value || '';
this.formView.displayButtonView.isOn = mathCommand.display || false;
}
_hideUI() {
if ( !this._isFormInPanel ) {
return;
}
const editor = this.editor;
this.stopListening( editor.ui, 'update' );
this.stopListening( this._balloon, 'change:visibleView' );
editor.editing.view.focus();
// Remove form first because it's on top of the stack.
this._removeFormView();
}
_closeFormView() {
const mathCommand = this.editor.commands.get( 'math' );
if ( mathCommand.value !== undefined ) {
this._removeFormView();
} else {
this._hideUI();
}
}
_removeFormView() {
if ( this._isFormInPanel ) {
this.formView.saveButtonView.focus();
this._balloon.remove( this.formView );
// Hide preview element
const previewEl = global.document.getElementById( this._previewUid );
if ( previewEl ) {
previewEl.style.visibility = 'hidden';
}
this.editor.editing.view.focus();
}
}
_createToolbarMathButton() {
const editor = this.editor;
const mathCommand = editor.commands.get( 'math' );
const t = editor.t;
// Handle the `Ctrl+M` keystroke and show the panel.
editor.keystrokes.set( mathKeystroke, ( keyEvtData, cancel ) => {
// Prevent focusing the search bar in FF and opening new tab in Edge. #153, #154.
cancel();
if ( mathCommand.isEnabled ) {
this._showUI();
}
} );
this.editor.ui.componentFactory.add( 'math', locale => {
const button = new ButtonView( locale );
button.isEnabled = true;
button.label = t( 'Insert math' );
button.icon = mathIcon;
button.keystroke = mathKeystroke;
button.tooltip = true;
button.isToggleable = true;
button.bind( 'isEnabled' ).to( mathCommand, 'isEnabled' );
this.listenTo( button, 'execute', () => this._showUI() );
return button;
} );
}
_enableUserBalloonInteractions() {
const editor = this.editor;
const viewDocument = this.editor.editing.view.document;
this.listenTo( viewDocument, 'click', () => {
const mathCommand = editor.commands.get( 'math' );
if ( mathCommand.value ) {
if ( mathCommand.isEnabled ) {
this._showUI();
}
}
} );
// Close the panel on the Esc key press when the editable has focus and the balloon is visible.
editor.keystrokes.set( 'Esc', ( data, cancel ) => {
if ( this._isUIVisible ) {
this._hideUI();
cancel();
}
} );
// Close on click outside of balloon panel element.
clickOutsideHandler( {
emitter: this.formView,
activator: () => this._isFormInPanel,
contextElements: [ this._balloon.view.element ],
callback: () => this._hideUI()
} );
}
get _isUIVisible() {
const visibleView = this._balloon.visibleView;
return visibleView == this.formView;
}
get _isFormInPanel() {
return this._balloon.hasView( this.formView );
}
}

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import { icons } from 'ckeditor5/src/core';
import {
ButtonView, createLabeledInputText, FocusCycler, LabelView, LabeledFieldView,
submitHandler, SwitchButtonView, View, ViewCollection
} from 'ckeditor5/src/ui';
import { FocusTracker, KeystrokeHandler } from 'ckeditor5/src/utils';
import { extractDelimiters, hasDelimiters } from '../utils';
import MathView from './mathview';
import '../../theme/mathform.css';
const { check: checkIcon, cancel: cancelIcon } = icons;
export default class MainFormView extends View {
constructor( locale, engine, lazyLoad, previewEnabled, previewUid, previewClassName, popupClassName, katexRenderOptions ) {
super( locale );
const t = locale.t;
// Create key event & focus trackers
this._createKeyAndFocusTrackers();
// Submit button
this.saveButtonView = this._createButton( t( 'Save' ), checkIcon, 'ck-button-save', null );
this.saveButtonView.type = 'submit';
// Equation input
this.mathInputView = this._createMathInput();
// Display button
this.displayButtonView = this._createDisplayButton();
// Cancel button
this.cancelButtonView = this._createButton( t( 'Cancel' ), cancelIcon, 'ck-button-cancel', 'cancel' );
this.previewEnabled = previewEnabled;
let children = [];
if ( this.previewEnabled ) {
// Preview label
this.previewLabel = new LabelView( locale );
this.previewLabel.text = t( 'Equation preview' );
// Math element
this.mathView = new MathView( engine, lazyLoad, locale, previewUid, previewClassName, katexRenderOptions );
this.mathView.bind( 'display' ).to( this.displayButtonView, 'isOn' );
children = [
this.mathInputView,
this.displayButtonView,
this.previewLabel,
this.mathView
];
} else {
children = [
this.mathInputView,
this.displayButtonView
];
}
// Add UI elements to template
this.setTemplate( {
tag: 'form',
attributes: {
class: [
'ck',
'ck-math-form',
...popupClassName
],
tabindex: '-1',
spellcheck: 'false'
},
children: [
{
tag: 'div',
attributes: {
class: [
'ck-math-view'
]
},
children
},
this.saveButtonView,
this.cancelButtonView
]
} );
}
render() {
super.render();
// Prevent default form submit event & trigger custom 'submit'
submitHandler( {
view: this
} );
// Register form elements to focusable elements
const childViews = [
this.mathInputView,
this.displayButtonView,
this.saveButtonView,
this.cancelButtonView
];
childViews.forEach( v => {
this._focusables.add( v );
this.focusTracker.add( v.element );
} );
// Listen to keypresses inside form element
this.keystrokes.listenTo( this.element );
}
focus() {
this._focusCycler.focusFirst();
}
get equation() {
return this.mathInputView.fieldView.element.value;
}
set equation( equation ) {
this.mathInputView.fieldView.element.value = equation;
if ( this.previewEnabled ) {
this.mathView.value = equation;
}
}
_createKeyAndFocusTrackers() {
this.focusTracker = new FocusTracker();
this.keystrokes = new KeystrokeHandler();
this._focusables = new ViewCollection();
this._focusCycler = new FocusCycler( {
focusables: this._focusables,
focusTracker: this.focusTracker,
keystrokeHandler: this.keystrokes,
actions: {
focusPrevious: 'shift + tab',
focusNext: 'tab'
}
} );
}
_createMathInput() {
const t = this.locale.t;
// Create equation input
const mathInput = new LabeledFieldView( this.locale, createLabeledInputText );
const fieldView = mathInput.fieldView;
mathInput.infoText = t( 'Insert equation in TeX format.' );
const onInput = () => {
if ( fieldView.element != null ) {
let equationInput = fieldView.element.value.trim();
// If input has delimiters
if ( hasDelimiters( equationInput ) ) {
// Get equation without delimiters
const params = extractDelimiters( equationInput );
// Remove delimiters from input field
fieldView.element.value = params.equation;
equationInput = params.equation;
// update display button and preview
this.displayButtonView.isOn = params.display;
}
if ( this.previewEnabled ) {
// Update preview view
this.mathView.value = equationInput;
}
this.saveButtonView.isEnabled = !!equationInput;
}
};
fieldView.on( 'render', onInput );
fieldView.on( 'input', onInput );
return mathInput;
}
_createButton( label, icon, className, eventName ) {
const button = new ButtonView( this.locale );
button.set( {
label,
icon,
tooltip: true
} );
button.extendTemplate( {
attributes: {
class: className
}
} );
if ( eventName ) {
button.delegate( 'execute' ).to( this, eventName );
}
return button;
}
_createDisplayButton() {
const t = this.locale.t;
const switchButton = new SwitchButtonView( this.locale );
switchButton.set( {
label: t( 'Display mode' ),
withText: true
} );
switchButton.extendTemplate( {
attributes: {
class: 'ck-button-display-toggle'
}
} );
switchButton.on( 'execute', () => {
// Toggle state
switchButton.isOn = !switchButton.isOn;
if ( this.previewEnabled ) {
// Update preview view
this.mathView.display = switchButton.isOn;
}
} );
return switchButton;
}
}

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import { View } from 'ckeditor5/src/ui';
import { renderEquation } from '../utils';
export default class MathView extends View {
constructor( engine, lazyLoad, locale, previewUid, previewClassName, katexRenderOptions ) {
super( locale );
this.engine = engine;
this.lazyLoad = lazyLoad;
this.previewUid = previewUid;
this.katexRenderOptions = katexRenderOptions;
this.previewClassName = previewClassName;
this.set( 'value', '' );
this.set( 'display', false );
this.on( 'change', () => {
if ( this.isRendered ) {
this.updateMath();
}
} );
this.setTemplate( {
tag: 'div',
attributes: {
class: [
'ck',
'ck-math-preview'
]
}
} );
}
updateMath() {
renderEquation( this.value, this.element, this.engine, this.lazyLoad, this.display, true, this.previewUid, this.previewClassName,
this.katexRenderOptions );
}
render() {
super.render();
this.updateMath();
}
}

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import { BalloonPanelView } from 'ckeditor5/src/ui';
import { global } from 'ckeditor5/src/utils';
export function getSelectedMathModelWidget( selection ) {
const selectedElement = selection.getSelectedElement();
if ( selectedElement && ( selectedElement.is( 'element', 'mathtex-inline' ) || selectedElement.is( 'element', 'mathtex-display' ) ) ) {
return selectedElement;
}
return null;
}
// Simple MathJax 3 version check
export function isMathJaxVersion3( version ) {
return version && typeof version === 'string' && version.split( '.' ).length === 3 && version.split( '.' )[ 0 ] === '3';
}
// Check if equation has delimiters.
export function hasDelimiters( text ) {
return text.match( /^(\\\[.*?\\\]|\\\(.*?\\\))$/ );
}
// Find delimiters count
export function delimitersCounts( text ) {
return text.match( /(\\\[|\\\]|\\\(|\\\))/g ).length;
}
// Extract delimiters and figure display mode for the model
export function extractDelimiters( equation ) {
equation = equation.trim();
// Remove delimiters (e.g. \( \) or \[ \])
const hasInlineDelimiters = equation.includes( '\\(' ) && equation.includes( '\\)' );
const hasDisplayDelimiters = equation.includes( '\\[' ) && equation.includes( '\\]' );
if ( hasInlineDelimiters || hasDisplayDelimiters ) {
equation = equation.substring( 2, equation.length - 2 ).trim();
}
return {
equation,
display: hasDisplayDelimiters
};
}
export async function renderEquation(
equation, element, engine = 'katex', lazyLoad, display = false, preview = false, previewUid, previewClassName = [],
katexRenderOptions = {}
) {
if ( engine === 'mathjax' && typeof MathJax !== 'undefined' ) {
if ( isMathJaxVersion3( MathJax.version ) ) {
selectRenderMode( element, preview, previewUid, previewClassName, el => {
renderMathJax3( equation, el, display, () => {
if ( preview ) {
moveAndScaleElement( element, el );
el.style.visibility = 'visible';
}
} );
} );
} else {
selectRenderMode( element, preview, previewUid, previewClassName, el => {
// Fixme: MathJax typesetting cause occasionally math processing error without asynchronous call
global.window.setTimeout( () => {
renderMathJax2( equation, el, display );
// Move and scale after rendering
if ( preview ) {
// eslint-disable-next-line
MathJax.Hub.Queue( () => {
moveAndScaleElement( element, el );
el.style.visibility = 'visible';
} );
}
} );
} );
}
} else if ( engine === 'katex' && typeof katex !== 'undefined' ) {
selectRenderMode( element, preview, previewUid, previewClassName, el => {
katex.render( equation, el, {
throwOnError: false,
displayMode: display,
...katexRenderOptions
} );
if ( preview ) {
moveAndScaleElement( element, el );
el.style.visibility = 'visible';
}
} );
} else if ( typeof engine === 'function' ) {
engine( equation, element, display );
} else {
if ( typeof lazyLoad !== 'undefined' ) {
try {
if ( !global.window.CKEDITOR_MATH_LAZY_LOAD ) {
global.window.CKEDITOR_MATH_LAZY_LOAD = lazyLoad();
}
element.innerHTML = equation;
await global.window.CKEDITOR_MATH_LAZY_LOAD;
renderEquation( equation, element, engine, undefined, display, preview, previewUid, previewClassName, katexRenderOptions );
}
catch ( err ) {
element.innerHTML = equation;
console.error( `math-tex-typesetting-lazy-load-failed: Lazy load failed: ${ err }` );
}
} else {
element.innerHTML = equation;
console.warn( `math-tex-typesetting-missing: Missing the mathematical typesetting engine (${ engine }) for tex.` );
}
}
}
export function getBalloonPositionData( editor ) {
const view = editor.editing.view;
const defaultPositions = BalloonPanelView.defaultPositions;
const selectedElement = view.document.selection.getSelectedElement();
if ( selectedElement ) {
return {
target: view.domConverter.viewToDom( selectedElement ),
positions: [
defaultPositions.southArrowNorth,
defaultPositions.southArrowNorthWest,
defaultPositions.southArrowNorthEast
]
};
}
else {
const viewDocument = view.document;
return {
target: view.domConverter.viewRangeToDom( viewDocument.selection.getFirstRange() ),
positions: [
defaultPositions.southArrowNorth,
defaultPositions.southArrowNorthWest,
defaultPositions.southArrowNorthEast
]
};
}
}
function selectRenderMode( element, preview, previewUid, previewClassName, cb ) {
if ( preview ) {
createPreviewElement( element, previewUid, previewClassName, previewEl => {
cb( previewEl );
} );
} else {
cb( element );
}
}
function renderMathJax3( equation, element, display, cb ) {
let promiseFunction = undefined;
if ( typeof MathJax.tex2chtmlPromise !== 'undefined' ) {
promiseFunction = MathJax.tex2chtmlPromise;
} else if ( typeof MathJax.tex2svgPromise !== 'undefined' ) {
promiseFunction = MathJax.tex2svgPromise;
}
if ( typeof promiseFunction !== 'undefined' ) {
promiseFunction( equation, { display } ).then( node => {
if ( element.firstChild ) {
element.removeChild( element.firstChild );
}
element.appendChild( node );
cb();
} );
}
}
function renderMathJax2( equation, element, display ) {
if ( display ) {
element.innerHTML = '\\[' + equation + '\\]';
} else {
element.innerHTML = '\\(' + equation + '\\)';
}
// eslint-disable-next-line
MathJax.Hub.Queue( [ 'Typeset', MathJax.Hub, element ] );
}
function createPreviewElement( element, previewUid, previewClassName, render ) {
const previewEl = getPreviewElement( element, previewUid, previewClassName );
render( previewEl );
}
function getPreviewElement( element, previewUid, previewClassName ) {
let previewEl = global.document.getElementById( previewUid );
// Create if not found
if ( !previewEl ) {
previewEl = global.document.createElement( 'div' );
previewEl.setAttribute( 'id', previewUid );
previewEl.classList.add( ...previewClassName );
previewEl.style.visibility = 'hidden';
global.document.body.appendChild( previewEl );
let ticking = false;
const renderTransformation = () => {
if ( !ticking ) {
global.window.requestAnimationFrame( () => {
moveElement( element, previewEl );
ticking = false;
} );
ticking = true;
}
};
// Create scroll listener for following
global.window.addEventListener( 'resize', renderTransformation );
global.window.addEventListener( 'scroll', renderTransformation );
}
return previewEl;
}
function moveAndScaleElement( parent, child ) {
// Move to right place
moveElement( parent, child );
// Scale parent element same as preview
const domRect = child.getBoundingClientRect();
parent.style.width = domRect.width + 'px';
parent.style.height = domRect.height + 'px';
}
function moveElement( parent, child ) {
const domRect = parent.getBoundingClientRect();
const left = global.window.scrollX + domRect.left;
const top = global.window.scrollY + domRect.top;
child.style.position = 'absolute';
child.style.left = left + 'px';
child.style.top = top + 'px';
child.style.zIndex = 'var(--ck-z-panel)';
child.style.pointerEvents = 'none';
}