Publish Vulpes Preview 15 sources for desktop, Android and Tundra
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
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198
host/Views.sys.mjs
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198
host/Views.sys.mjs
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// The desktop-only adapter for external web pages. A web page is loaded as a
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// real top-level browser, never by removing CSP or frame-ancestors protection.
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export const Views = {
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entries: new Map(),
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remove(id, entry) {
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const contextId = entry.topContextId;
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try {
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entry.browser.removeProgressListener(entry.listener);
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} catch (_) {} // Teardown may have detached its loader.
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entry.browser.remove();
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this.entries.delete(id);
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Services.ppmm.sharedData.set(
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'vulpes:host-contexts',
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(Services.ppmm.sharedData.get('vulpes:host-contexts') || []).filter((id) => id !== contextId),
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);
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Services.ppmm.sharedData.flush();
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},
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prune() {
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for (const [id, entry] of this.entries) {
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if (!BrowsingContext.get(id)?.parent) {
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this.remove(id, entry);
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continue;
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}
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// A detached iframe's BrowsingContext can outlive its DOM element.
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// Ask the trusted child actor about actual ownership, not just the BC tree.
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if (entry.checking) continue;
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entry.checking = true;
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entry.actor
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.sendQuery('Vulpes:ViewAlive', { contextId: id })
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.then(
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(alive) => {
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if (!alive && this.entries.get(id) === entry) this.remove(id, entry);
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},
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() => {
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if (this.entries.get(id) === entry) this.remove(id, entry);
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},
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)
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.finally(() => {
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entry.checking = false;
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});
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}
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},
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cleanup(actor) {
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for (const [id, entry] of this.entries)
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if (entry.actor === actor) {
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this.remove(id, entry);
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}
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},
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async request(actor, { contextId, operation, url, geometry }) {
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const context = BrowsingContext.get(contextId);
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if (!context || context.parent !== actor.browsingContext) throw new Error('INVALID_VIEW_OWNER');
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let entry = this.entries.get(contextId);
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if (entry && entry.actor !== actor) throw new Error('INVALID_VIEW_OWNER');
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if (operation === 'cancelTouch') {
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const target = entry ? entry.browser.browsingContext : context;
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return target.currentWindowGlobal
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.getActor('VulpesTouch')
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.sendQuery('Vulpes:CancelTouch', [
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{ identifier: 0, offsetX: 0, offsetY: 0, radiiX: 1, radiiY: 1 },
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]);
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}
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if (operation === 'capture') {
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const target = entry ? entry.browser.browsingContext : context;
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const image = await target.currentWindowGlobal.drawSnapshot(null, 1, 'white');
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const doc = actor.browsingContext.top.embedderElement.ownerDocument;
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const canvas = doc.createElementNS('http://www.w3.org/1999/xhtml', 'canvas');
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canvas.width = image.width;
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canvas.height = image.height;
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canvas.getContext('2d').drawImage(image, 0, 0);
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image.close();
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return new Promise((resolve) => canvas.toBlob(resolve, 'image/png'));
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}
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if (operation === 'open') {
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const uri = Services.io.newURI(url);
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if (!['http', 'https'].includes(uri.scheme)) throw new Error('URL_SCHEME_DENIED');
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if (!entry) {
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const shell = actor.browsingContext.top.embedderElement.ownerDocument.defaultView;
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const browser = shell.document.createXULElement('browser');
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browser.setAttribute('type', 'content');
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browser.setAttribute('remote', 'true');
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browser.setAttribute('remoteType', 'web');
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browser.setAttribute('maychangeremoteness', 'true');
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browser.style.cssText =
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'display:block;position:absolute;background:white;visibility:hidden';
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shell.document.getElementById('screen').append(browser);
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if (!Services.ppmm.sharedData.get('vulpes:native-touch')) {
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browser.browsingContext.inRDMPane = true;
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browser.browsingContext.setRDMPaneMaxTouchPoints(1);
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browser.browsingContext.touchEventsOverride = 'enabled';
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}
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const contexts = Services.ppmm.sharedData.get('vulpes:host-contexts') || [];
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Services.ppmm.sharedData.set(
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'vulpes:host-contexts',
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contexts.concat(browser.browsingContext.id),
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);
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Services.ppmm.sharedData.flush();
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const emit = (type, detail = {}) => {
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try {
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actor.sendAsyncMessage('Vulpes:Event', {
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type: 'view',
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data: { contextId, type, detail },
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});
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} catch (_) {}
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};
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const listener = {
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QueryInterface: ChromeUtils.generateQI([
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'nsIWebProgressListener',
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'nsISupportsWeakReference',
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]),
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onLocationChange(progress, request, location) {
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if (!progress.isTopLevel) return;
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if (location.spec === 'about:blank') return; // Initial, uncommitted context.
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emit('locationchange', {
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url: location.spec,
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canGoBack: browser.canGoBack,
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canGoForward: browser.canGoForward,
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});
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},
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onStateChange(progress, request, flags, status) {
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if (!progress.isTopLevel || !(flags & Ci.nsIWebProgressListener.STATE_IS_WINDOW))
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return;
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if (flags & Ci.nsIWebProgressListener.STATE_START) emit('loadstart');
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if (flags & Ci.nsIWebProgressListener.STATE_STOP) {
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emit('loadend', { backgroundColor: 'rgb(255, 255, 255)' });
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emit('titlechange', browser.contentTitle || browser.currentURI.spec);
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if (!Components.isSuccessCode(status)) emit('error', { type: 'other', status });
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}
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},
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onProgressChange() {},
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onStatusChange() {},
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onSecurityChange() {},
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onContentBlockingEvent() {},
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};
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browser.addProgressListener(listener);
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entry = {
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actor,
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browser,
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listener,
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context,
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url,
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topContextId: browser.browsingContext.id,
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};
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this.entries.set(contextId, entry);
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}
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entry.url = url;
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entry.browser.loadURI(uri, {
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triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(),
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});
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return null;
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}
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if (!entry) throw new Error('VIEW_NOT_FOUND');
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const browser = entry.browser;
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if (operation === 'geometry') {
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const { left, top, width, height, visible } = geometry || {};
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if (![left, top, width, height].every(Number.isFinite)) throw new Error('INVALID_GEOMETRY');
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const shell = browser.ownerDocument.defaultView,
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screen = shell.document.getElementById('screen');
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const bounds = screen.getBoundingClientRect();
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const x = left - shell.mozInnerScreenX - bounds.left;
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const y = top - shell.mozInnerScreenY - bounds.top;
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const right = Math.min(480, x + width),
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bottom = Math.min(800, y + height);
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const clippedX = Math.max(0, x),
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clippedY = Math.max(0, y);
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Object.assign(browser.style, {
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left: clippedX + 'px',
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top: clippedY + 'px',
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width: Math.max(0, right - clippedX) + 'px',
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height: Math.max(0, bottom - clippedY) + 'px',
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visibility: visible && right > clippedX && bottom > clippedY ? 'visible' : 'hidden',
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});
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return null;
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}
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if (operation === 'back') {
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if (browser.canGoBack) browser.goBack();
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return null;
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}
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if (operation === 'forward') {
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if (browser.canGoForward) browser.goForward();
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return null;
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}
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if (operation === 'reload') {
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browser.reload();
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return null;
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}
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if (operation === 'stop') {
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browser.stop();
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return null;
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}
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if (operation === 'canGoBack') return browser.canGoBack;
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if (operation === 'canGoForward') return browser.canGoForward;
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if (operation === 'close') {
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this.remove(contextId, entry);
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return null;
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}
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throw new Error('METHOD_NOT_SUPPORTED');
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},
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};
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