Method getScrollY

src/helpViewer/panel.ts:255–267

()

    // Get current scrollY from webview
    private async getScrollY(): Promise<number> {
        this.scrollYCallback?.(0);
        const scrollYPromise = new Promise<number>((resolve, reject) => {
            const timeout = setTimeout(() => reject('GetScrollY message timed out after 1s'), 1000);
            this.scrollYCallback = (y: number) => {
                clearTimeout(timeout);
                this.scrollYCallback = undefined;
                resolve(y);
            };
        });
        void this.panel?.webview.postMessage({ command: 'getScrollY' });
        return scrollYPromise;
    }

    // handle message produced by javascript inside the help page
    private async handleMessage(msg: OutMessage) {