monaco-editor-core
Version:
A browser based code editor
81 lines (80 loc) • 3.51 kB
JavaScript
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import * as dom from './dom.js';
import { DisposableStore, toDisposable } from '../common/lifecycle.js';
export class GlobalPointerMoveMonitor {
constructor() {
this._hooks = new DisposableStore();
this._pointerMoveCallback = null;
this._onStopCallback = null;
}
dispose() {
this.stopMonitoring(false);
this._hooks.dispose();
}
stopMonitoring(invokeStopCallback, browserEvent) {
if (!this.isMonitoring()) {
// Not monitoring
return;
}
// Unhook
this._hooks.clear();
this._pointerMoveCallback = null;
const onStopCallback = this._onStopCallback;
this._onStopCallback = null;
if (invokeStopCallback && onStopCallback) {
onStopCallback(browserEvent);
}
}
isMonitoring() {
return !!this._pointerMoveCallback;
}
startMonitoring(initialElement, pointerId, initialButtons, pointerMoveCallback, onStopCallback) {
if (this.isMonitoring()) {
this.stopMonitoring(false);
}
this._pointerMoveCallback = pointerMoveCallback;
this._onStopCallback = onStopCallback;
let eventSource = initialElement;
try {
initialElement.setPointerCapture(pointerId);
this._hooks.add(toDisposable(() => {
try {
initialElement.releasePointerCapture(pointerId);
}
catch (err) {
// See https://github.com/microsoft/vscode/issues/161731
//
// `releasePointerCapture` sometimes fails when being invoked with the exception:
// DOMException: Failed to execute 'releasePointerCapture' on 'Element':
// No active pointer with the given id is found.
//
// There's no need to do anything in case of failure
}
}));
}
catch (err) {
// See https://github.com/microsoft/vscode/issues/144584
// See https://github.com/microsoft/vscode/issues/146947
// `setPointerCapture` sometimes fails when being invoked
// from a `mousedown` listener on macOS and Windows
// and it always fails on Linux with the exception:
// DOMException: Failed to execute 'setPointerCapture' on 'Element':
// No active pointer with the given id is found.
// In case of failure, we bind the listeners on the window
eventSource = dom.getWindow(initialElement);
}
this._hooks.add(dom.addDisposableListener(eventSource, dom.EventType.POINTER_MOVE, (e) => {
if (e.buttons !== initialButtons) {
// Buttons state has changed in the meantime
this.stopMonitoring(true);
return;
}
e.preventDefault();
this._pointerMoveCallback(e);
}));
this._hooks.add(dom.addDisposableListener(eventSource, dom.EventType.POINTER_UP, (e) => this.stopMonitoring(true)));
}
}