chore(ckeditor5-math): integrate source code

packages/ckeditor5-math/src/mathcommand.ts

@@ -0,0 +1,64 @@
+import { Command } from 'ckeditor5';
+import { getSelectedMathModelWidget } from './utils.js';
+
+export default class MathCommand extends Command {
+	public override value: string | null = null;
+	public override execute(
+		equation: string,
+		display?: boolean,
+		outputType: 'script' | 'span' = 'script',
+		forceOutputType?: boolean
+	): void {
+		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 );
+		} );
+	}
+
+	public display = false;
+
+	public override refresh(): void {
+		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 );
+		const value = selectedEquation?.getAttribute( 'equation' );
+		this.value = typeof value === 'string' ? value : null;
+		const display = selectedEquation?.getAttribute( 'display' );
+		this.display = typeof display === 'boolean' ? display : false;
+	}
+}