code-server/lib/vscode/extensions/simple-browser/preview-src/index.ts
2021-04-09 11:32:27 +05:30

112 lines
3.1 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 { onceDocumentLoaded } from './events';
declare let acquireVsCodeApi: any;
const vscode = acquireVsCodeApi();
function getSettings() {
const element = document.getElementById('simple-browser-settings');
if (element) {
const data = element.getAttribute('data-settings');
if (data) {
return JSON.parse(data);
}
}
throw new Error(`Could not load settings`);
}
const settings = getSettings();
const iframe = document.querySelector('iframe')!;
const header = document.querySelector('.header')!;
const input = header.querySelector<HTMLInputElement>('.url-input')!;
const forwardButton = header.querySelector<HTMLButtonElement>('.forward-button')!;
const backButton = header.querySelector<HTMLButtonElement>('.back-button')!;
const reloadButton = header.querySelector<HTMLButtonElement>('.reload-button')!;
const openExternalButton = header.querySelector<HTMLButtonElement>('.open-external-button')!;
window.addEventListener('message', e => {
switch (e.data.type) {
case 'focus':
{
iframe.focus();
break;
}
case 'didChangeFocusLockIndicatorEnabled':
{
toggleFocusLockIndicatorEnabled(e.data.enabled);
break;
}
}
});
onceDocumentLoaded(() => {
setInterval(() => {
const iframeFocused = document.activeElement?.tagName === 'IFRAME';
document.body.classList.toggle('iframe-focused', iframeFocused);
}, 50);
iframe.addEventListener('load', () => {
// Noop
});
input.addEventListener('change', e => {
const url = (e.target as HTMLInputElement).value;
navigateTo(url);
});
forwardButton.addEventListener('click', () => {
history.forward();
});
backButton.addEventListener('click', () => {
history.back();
});
openExternalButton.addEventListener('click', () => {
vscode.postMessage({
type: 'openExternal',
url: input.value
});
});
reloadButton.addEventListener('click', () => {
// This does not seem to trigger what we want
// history.go(0);
// This incorrectly adds entries to the history but does reload
// It also always incorrectly always loads the value in the input bar,
// which may not match the current page if the user has navigated
navigateTo(input.value);
});
navigateTo(settings.url);
input.value = settings.url;
toggleFocusLockIndicatorEnabled(settings.focusLockIndicatorEnabled);
function navigateTo(rawUrl: string): void {
try {
const url = new URL(rawUrl);
// Try to bust the cache for the iframe
// There does not appear to be any way to reliably do this except modifying the url
url.searchParams.append('vscodeBrowserReqId', Date.now().toString());
iframe.src = url.toString();
} catch {
iframe.src = rawUrl;
}
}
});
function toggleFocusLockIndicatorEnabled(enabled: boolean) {
document.body.classList.toggle('enable-focus-lock-indicator', enabled);
}