34 lines
No EOL
1.1 KiB
TypeScript
34 lines
No EOL
1.1 KiB
TypeScript
/*---------------------------------------------------------------------------------------------
|
|
* Copyright (c) Microsoft Corporation. All rights reserved.
|
|
* Licensed under the MIT License. See License.txt in the project root for license information.
|
|
*--------------------------------------------------------------------------------------------*/
|
|
import { getElementsForSourceLine } from './scroll-sync';
|
|
|
|
export class ActiveLineMarker {
|
|
private _current: any;
|
|
|
|
onDidChangeTextEditorSelection(line: number) {
|
|
const { previous } = getElementsForSourceLine(line);
|
|
this._update(previous && previous.element);
|
|
}
|
|
|
|
_update(before: HTMLElement | undefined) {
|
|
this._unmarkActiveElement(this._current);
|
|
this._markActiveElement(before);
|
|
this._current = before;
|
|
}
|
|
|
|
_unmarkActiveElement(element: HTMLElement | undefined) {
|
|
if (!element) {
|
|
return;
|
|
}
|
|
element.className = element.className.replace(/\bcode-active-line\b/g, '');
|
|
}
|
|
|
|
_markActiveElement(element: HTMLElement | undefined) {
|
|
if (!element) {
|
|
return;
|
|
}
|
|
element.className += ' code-active-line';
|
|
}
|
|
} |