diff options
Diffstat (limited to 'browser/modules/webrtcUI.jsm')
| -rw-r--r-- | browser/modules/webrtcUI.jsm | 1304 |
1 files changed, 1304 insertions, 0 deletions
diff --git a/browser/modules/webrtcUI.jsm b/browser/modules/webrtcUI.jsm new file mode 100644 index 0000000000..de64af9301 --- /dev/null +++ b/browser/modules/webrtcUI.jsm @@ -0,0 +1,1304 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +"use strict"; + +var EXPORTED_SYMBOLS = [ + "webrtcUI", + "showStreamSharingMenu", + "MacOSWebRTCStatusbarIndicator", +]; + +const { EventEmitter } = ChromeUtils.import( + "resource:///modules/syncedtabs/EventEmitter.jsm" +); +const { XPCOMUtils } = ChromeUtils.importESModule( + "resource://gre/modules/XPCOMUtils.sys.mjs" +); + +const { AppConstants } = ChromeUtils.importESModule( + "resource://gre/modules/AppConstants.sys.mjs" +); +const lazy = {}; +ChromeUtils.defineModuleGetter( + lazy, + "BrowserWindowTracker", + "resource:///modules/BrowserWindowTracker.jsm" +); +ChromeUtils.defineModuleGetter( + lazy, + "SitePermissions", + "resource:///modules/SitePermissions.jsm" +); +XPCOMUtils.defineLazyGetter( + lazy, + "syncL10n", + () => new Localization(["browser/webrtcIndicator.ftl"], true) +); +XPCOMUtils.defineLazyGetter( + lazy, + "listFormat", + () => new Services.intl.ListFormat(undefined) +); + +const SHARING_L10NID_BY_TYPE = new Map([ + [ + "Camera", + [ + "webrtc-indicator-menuitem-sharing-camera-with", + "webrtc-indicator-menuitem-sharing-camera-with-n-tabs", + ], + ], + [ + "Microphone", + [ + "webrtc-indicator-menuitem-sharing-microphone-with", + "webrtc-indicator-menuitem-sharing-microphone-with-n-tabs", + ], + ], + [ + "Application", + [ + "webrtc-indicator-menuitem-sharing-application-with", + "webrtc-indicator-menuitem-sharing-application-with-n-tabs", + ], + ], + [ + "Screen", + [ + "webrtc-indicator-menuitem-sharing-screen-with", + "webrtc-indicator-menuitem-sharing-screen-with-n-tabs", + ], + ], + [ + "Window", + [ + "webrtc-indicator-menuitem-sharing-window-with", + "webrtc-indicator-menuitem-sharing-window-with-n-tabs", + ], + ], + [ + "Browser", + [ + "webrtc-indicator-menuitem-sharing-browser-with", + "webrtc-indicator-menuitem-sharing-browser-with-n-tabs", + ], + ], +]); + +// These identifiers are defined in MediaStreamTrack.webidl +const MEDIA_SOURCE_L10NID_BY_TYPE = new Map([ + ["camera", "webrtc-item-camera"], + ["screen", "webrtc-item-screen"], + ["application", "webrtc-item-application"], + ["window", "webrtc-item-window"], + ["browser", "webrtc-item-browser"], + ["microphone", "webrtc-item-microphone"], + ["audioCapture", "webrtc-item-audio-capture"], +]); + +var webrtcUI = { + initialized: false, + + peerConnectionBlockers: new Set(), + emitter: new EventEmitter(), + + init() { + if (!this.initialized) { + Services.obs.addObserver(this, "browser-delayed-startup-finished"); + this.initialized = true; + + XPCOMUtils.defineLazyPreferenceGetter( + this, + "useLegacyGlobalIndicator", + "privacy.webrtc.legacyGlobalIndicator", + true + ); + XPCOMUtils.defineLazyPreferenceGetter( + this, + "deviceGracePeriodTimeoutMs", + "privacy.webrtc.deviceGracePeriodTimeoutMs" + ); + + Services.telemetry.setEventRecordingEnabled("webrtc.ui", true); + } + }, + + uninit() { + if (this.initialized) { + Services.obs.removeObserver(this, "browser-delayed-startup-finished"); + this.initialized = false; + } + }, + + observe(subject, topic, data) { + if (topic == "browser-delayed-startup-finished") { + if (webrtcUI.showGlobalIndicator) { + showOrCreateMenuForWindow(subject); + } + } + }, + + SHARING_NONE: 0, + SHARING_WINDOW: 1, + SHARING_SCREEN: 2, + + // Set of browser windows that are being shared over WebRTC. + sharedBrowserWindows: new WeakSet(), + + // True if one or more screens is being shared. + sharingScreen: false, + + allowedSharedBrowsers: new WeakSet(), + allowTabSwitchesForSession: false, + tabSwitchCountForSession: 0, + + // True if a window or screen is being shared. + sharingDisplay: false, + + // The session ID is used to try to differentiate between instances + // where the user is sharing their display somehow. If the user + // transitions from a state of not sharing their display, to sharing a + // display, we bump the ID. + sharingDisplaySessionId: 0, + + // Map of browser elements to indicator data. + perTabIndicators: new Map(), + activePerms: new Map(), + + get showGlobalIndicator() { + for (let [, indicators] of this.perTabIndicators) { + if ( + indicators.showCameraIndicator || + indicators.showMicrophoneIndicator || + indicators.showScreenSharingIndicator + ) { + return true; + } + } + return false; + }, + + get showCameraIndicator() { + for (let [, indicators] of this.perTabIndicators) { + if (indicators.showCameraIndicator) { + return true; + } + } + return false; + }, + + get showMicrophoneIndicator() { + for (let [, indicators] of this.perTabIndicators) { + if (indicators.showMicrophoneIndicator) { + return true; + } + } + return false; + }, + + get showScreenSharingIndicator() { + let list = [""]; + for (let [, indicators] of this.perTabIndicators) { + if (indicators.showScreenSharingIndicator) { + list.push(indicators.showScreenSharingIndicator); + } + } + + let precedence = ["Screen", "Window", "Application", "Browser", ""]; + + list.sort((a, b) => { + return precedence.indexOf(a) - precedence.indexOf(b); + }); + + return list[0]; + }, + + _streams: [], + // The boolean parameters indicate which streams should be included in the result. + getActiveStreams(aCamera, aMicrophone, aScreen, aWindow = false) { + return webrtcUI._streams + .filter(aStream => { + let state = aStream.state; + return ( + (aCamera && state.camera) || + (aMicrophone && state.microphone) || + (aScreen && state.screen) || + (aWindow && state.window) + ); + }) + .map(aStream => { + let state = aStream.state; + let types = { + camera: state.camera, + microphone: state.microphone, + screen: state.screen, + window: state.window, + }; + let browser = aStream.topBrowsingContext.embedderElement; + // browser can be null when we are in the process of closing a tab + // and our stream list hasn't been updated yet. + // gBrowser will be null if a stream is used outside a tabbrowser window. + let tab = browser?.ownerGlobal.gBrowser?.getTabForBrowser(browser); + return { + uri: state.documentURI, + tab, + browser, + types, + devices: state.devices, + }; + }); + }, + + /** + * Returns true if aBrowser has an active WebRTC stream. + */ + browserHasStreams(aBrowser) { + for (let stream of this._streams) { + if (stream.topBrowsingContext.embedderElement == aBrowser) { + return true; + } + } + + return false; + }, + + /** + * Determine the combined state of all the active streams associated with + * the specified top-level browsing context. + */ + getCombinedStateForBrowser(aTopBrowsingContext) { + function combine(x, y) { + if ( + x == Ci.nsIMediaManagerService.STATE_CAPTURE_ENABLED || + y == Ci.nsIMediaManagerService.STATE_CAPTURE_ENABLED + ) { + return Ci.nsIMediaManagerService.STATE_CAPTURE_ENABLED; + } + if ( + x == Ci.nsIMediaManagerService.STATE_CAPTURE_DISABLED || + y == Ci.nsIMediaManagerService.STATE_CAPTURE_DISABLED + ) { + return Ci.nsIMediaManagerService.STATE_CAPTURE_DISABLED; + } + return Ci.nsIMediaManagerService.STATE_NOCAPTURE; + } + + let camera, microphone, screen, window, browser; + for (let stream of this._streams) { + if (stream.topBrowsingContext == aTopBrowsingContext) { + camera = combine(stream.state.camera, camera); + microphone = combine(stream.state.microphone, microphone); + screen = combine(stream.state.screen, screen); + window = combine(stream.state.window, window); + browser = combine(stream.state.browser, browser); + } + } + + let tabState = { camera, microphone }; + if (screen == Ci.nsIMediaManagerService.STATE_CAPTURE_ENABLED) { + tabState.screen = "Screen"; + } else if (window == Ci.nsIMediaManagerService.STATE_CAPTURE_ENABLED) { + tabState.screen = "Window"; + } else if (browser == Ci.nsIMediaManagerService.STATE_CAPTURE_ENABLED) { + tabState.screen = "Browser"; + } else if (screen == Ci.nsIMediaManagerService.STATE_CAPTURE_DISABLED) { + tabState.screen = "ScreenPaused"; + } else if (window == Ci.nsIMediaManagerService.STATE_CAPTURE_DISABLED) { + tabState.screen = "WindowPaused"; + } else if (browser == Ci.nsIMediaManagerService.STATE_CAPTURE_DISABLED) { + tabState.screen = "BrowserPaused"; + } + + let screenEnabled = tabState.screen && !tabState.screen.includes("Paused"); + let cameraEnabled = + tabState.camera == Ci.nsIMediaManagerService.STATE_CAPTURE_ENABLED; + let microphoneEnabled = + tabState.microphone == Ci.nsIMediaManagerService.STATE_CAPTURE_ENABLED; + + // tabState.sharing controls which global indicator should be shown + // for the tab. It should always be set to the _enabled_ device which + // we consider most intrusive (screen > camera > microphone). + if (screenEnabled) { + tabState.sharing = "screen"; + } else if (cameraEnabled) { + tabState.sharing = "camera"; + } else if (microphoneEnabled) { + tabState.sharing = "microphone"; + } else if (tabState.screen) { + tabState.sharing = "screen"; + } else if (tabState.camera) { + tabState.sharing = "camera"; + } else if (tabState.microphone) { + tabState.sharing = "microphone"; + } + + // The stream is considered paused when we're sharing something + // but all devices are off or set to disabled. + tabState.paused = + tabState.sharing && + !screenEnabled && + !cameraEnabled && + !microphoneEnabled; + + if ( + tabState.camera == Ci.nsIMediaManagerService.STATE_CAPTURE_ENABLED || + tabState.camera == Ci.nsIMediaManagerService.STATE_CAPTURE_DISABLED + ) { + tabState.showCameraIndicator = true; + } + if ( + tabState.microphone == Ci.nsIMediaManagerService.STATE_CAPTURE_ENABLED || + tabState.microphone == Ci.nsIMediaManagerService.STATE_CAPTURE_DISABLED + ) { + tabState.showMicrophoneIndicator = true; + } + + tabState.showScreenSharingIndicator = ""; + if (tabState.screen) { + if (tabState.screen.startsWith("Screen")) { + tabState.showScreenSharingIndicator = "Screen"; + } else if (tabState.screen.startsWith("Window")) { + if (tabState.showScreenSharingIndicator != "Screen") { + tabState.showScreenSharingIndicator = "Window"; + } + } else if (tabState.screen.startsWith("Browser")) { + if (!tabState.showScreenSharingIndicator) { + tabState.showScreenSharingIndicator = "Browser"; + } + } + } + + return tabState; + }, + + /* + * Indicate that a stream has been added or removed from the given + * browsing context. If it has been added, aData specifies the + * specific indicator types it uses. If aData is null or has no + * documentURI assigned, then the stream has been removed. + */ + streamAddedOrRemoved(aBrowsingContext, aData) { + this.init(); + + let index; + for (index = 0; index < webrtcUI._streams.length; ++index) { + let stream = this._streams[index]; + if (stream.browsingContext == aBrowsingContext) { + break; + } + } + // The update is a removal of the stream, triggered by the + // recording-window-ended notification. + if (aData.remove) { + if (index < this._streams.length) { + this._streams.splice(index, 1); + } + } else { + this._streams[index] = { + browsingContext: aBrowsingContext, + topBrowsingContext: aBrowsingContext.top, + state: aData, + }; + } + + let wasSharingDisplay = this.sharingDisplay; + + // Reset our internal notion of whether or not we're sharing + // a screen or browser window. Now we'll go through the shared + // devices and re-determine what's being shared. + let sharingBrowserWindow = false; + let sharedWindowRawDeviceIds = new Set(); + this.sharingDisplay = false; + this.sharingScreen = false; + let suppressNotifications = false; + + // First, go through the streams and collect the counts on things + // like the total number of shared windows, and whether or not we're + // sharing screens. + for (let stream of this._streams) { + let { state } = stream; + suppressNotifications |= state.suppressNotifications; + + for (let device of state.devices) { + let mediaSource = device.mediaSource; + + if (mediaSource == "window" || mediaSource == "screen") { + this.sharingDisplay = true; + } + + if (!device.scary) { + continue; + } + + if (mediaSource == "window") { + sharedWindowRawDeviceIds.add(device.rawId); + } else if (mediaSource == "screen") { + this.sharingScreen = true; + } + + // If the user has granted a particular site the ability + // to get a stream from a window or screen, we will + // presume that it's exempt from the tab switch warning. + // + // We use the permanentKey here so that the allowing of + // the tab survives tab tear-in and tear-out. We ignore + // browsers that don't have permanentKey, since those aren't + // tabbrowser browsers. + let browser = stream.topBrowsingContext.embedderElement; + if (browser.permanentKey) { + this.allowedSharedBrowsers.add(browser.permanentKey); + } + } + } + + // Next, go through the list of shared windows, and map them + // to our browser windows so that we know which ones are shared. + this.sharedBrowserWindows = new WeakSet(); + + for (let win of lazy.BrowserWindowTracker.orderedWindows) { + let rawDeviceId; + try { + rawDeviceId = win.windowUtils.webrtcRawDeviceId; + } catch (e) { + // This can theoretically throw if some of the underlying + // window primitives don't exist. In that case, we can skip + // to the next window. + continue; + } + if (sharedWindowRawDeviceIds.has(rawDeviceId)) { + this.sharedBrowserWindows.add(win); + + // If we've shared a window, then the initially selected tab + // in that window should be exempt from tab switch warnings, + // since it's already been shared. + let selectedBrowser = win.gBrowser.selectedBrowser; + this.allowedSharedBrowsers.add(selectedBrowser.permanentKey); + + sharingBrowserWindow = true; + } + } + + // If we weren't sharing a window or screen, and now are, bump + // the sharingDisplaySessionId. We use this ID for Event + // telemetry, and consider a transition from no shared displays + // to some shared displays as a new session. + if (!wasSharingDisplay && this.sharingDisplay) { + this.sharingDisplaySessionId++; + } + + // If we were adding a new display stream, record some Telemetry for + // it with the most recent sharedDisplaySessionId. We do this separately + // from the loops above because those take into account the pre-existing + // streams that might already have been shared. + if (aData.devices) { + // The mixture of camelCase with under_score notation here is due to + // an unfortunate collision of conventions between this file and + // Event Telemetry. + let silence_notifs = suppressNotifications ? "true" : "false"; + for (let device of aData.devices) { + if (device.mediaSource == "screen") { + this.recordEvent("share_display", "screen", { + silence_notifs, + }); + } else if (device.mediaSource == "window") { + if (device.scary) { + this.recordEvent("share_display", "browser_window", { + silence_notifs, + }); + } else { + this.recordEvent("share_display", "window", { + silence_notifs, + }); + } + } + } + } + + // Since we're not sharing a screen or browser window, + // we can clear these state variables, which are used + // to warn users on tab switching when sharing. These + // are safe to reset even if we hadn't been sharing + // the screen or browser window already. + if (!this.sharingScreen && !sharingBrowserWindow) { + this.allowedSharedBrowsers = new WeakSet(); + this.allowTabSwitchesForSession = false; + this.tabSwitchCountForSession = 0; + } + + this._setSharedData(); + if ( + Services.prefs.getBoolPref( + "privacy.webrtc.allowSilencingNotifications", + false + ) + ) { + let alertsService = Cc["@mozilla.org/alerts-service;1"] + .getService(Ci.nsIAlertsService) + .QueryInterface(Ci.nsIAlertsDoNotDisturb); + alertsService.suppressForScreenSharing = suppressNotifications; + } + }, + + /** + * Remove all the streams associated with a given + * browsing context. + */ + forgetStreamsFromBrowserContext(aBrowsingContext) { + for (let index = 0; index < webrtcUI._streams.length; ) { + let stream = this._streams[index]; + if (stream.browsingContext == aBrowsingContext) { + this._streams.splice(index, 1); + } else { + index++; + } + } + + // Remove the per-tab indicator if it no longer needs to be displayed. + let topBC = aBrowsingContext.top; + if (this.perTabIndicators.has(topBC)) { + let tabState = this.getCombinedStateForBrowser(topBC); + if ( + !tabState.showCameraIndicator && + !tabState.showMicrophoneIndicator && + !tabState.showScreenSharingIndicator + ) { + this.perTabIndicators.delete(topBC); + } + } + + this.updateGlobalIndicator(); + this._setSharedData(); + }, + + /** + * Given some set of streams, stops device access for those streams. + * Optionally, it's possible to stop a subset of the devices on those + * streams by passing in optional arguments. + * + * Once the streams have been stopped, this method will also find the + * newest stream's <xul:browser> and window, focus the window, and + * select the browser. + * + * For camera and microphone streams, this will also revoke any associated + * permissions from SitePermissions. + * + * @param {Array<Object>} activeStreams - An array of streams obtained via webrtcUI.getActiveStreams. + * @param {boolean} stopCameras - True to stop the camera streams (defaults to true) + * @param {boolean} stopMics - True to stop the microphone streams (defaults to true) + * @param {boolean} stopScreens - True to stop the screen streams (defaults to true) + * @param {boolean} stopWindows - True to stop the window streams (defaults to true) + */ + stopSharingStreams( + activeStreams, + stopCameras = true, + stopMics = true, + stopScreens = true, + stopWindows = true + ) { + if (!activeStreams.length) { + return; + } + + let ids = []; + if (stopCameras) { + ids.push("camera"); + } + if (stopMics) { + ids.push("microphone"); + } + if (stopScreens || stopWindows) { + ids.push("screen"); + } + + for (let stream of activeStreams) { + let { browser } = stream; + + let gBrowser = browser.getTabBrowser(); + if (!gBrowser) { + console.error("Can't stop sharing stream - cannot find gBrowser."); + continue; + } + + let tab = gBrowser.getTabForBrowser(browser); + if (!tab) { + console.error("Can't stop sharing stream - cannot find tab."); + continue; + } + + this.clearPermissionsAndStopSharing(ids, tab); + } + + // Switch to the newest stream's browser. + let mostRecentStream = activeStreams[activeStreams.length - 1]; + let { browser: browserToSelect } = mostRecentStream; + + let window = browserToSelect.ownerGlobal; + let gBrowser = browserToSelect.getTabBrowser(); + let tab = gBrowser.getTabForBrowser(browserToSelect); + window.focus(); + gBrowser.selectedTab = tab; + }, + + /** + * Clears permissions and stops sharing (if active) for a list of device types + * and a specific tab. + * @param {("camera"|"microphone"|"screen")[]} types - Device types to stop + * and clear permissions for. + * @param tab - Tab of the devices to stop and clear permissions. + */ + clearPermissionsAndStopSharing(types, tab) { + let invalidTypes = types.filter( + type => !["camera", "screen", "microphone", "speaker"].includes(type) + ); + if (invalidTypes.length) { + throw new Error(`Invalid device types ${invalidTypes.join(",")}`); + } + let browser = tab.linkedBrowser; + let sharingState = tab._sharingState?.webRTC; + + // If we clear a WebRTC permission we need to remove all permissions of + // the same type across device ids. We also need to stop active WebRTC + // devices related to the permission. + let perms = lazy.SitePermissions.getAllForBrowser(browser); + + // If capturing, don't revoke one of camera/microphone without the other. + let sharingCameraOrMic = + (sharingState?.camera || sharingState?.microphone) && + (types.includes("camera") || types.includes("microphone")); + + perms + .filter(perm => { + let [id] = perm.id.split(lazy.SitePermissions.PERM_KEY_DELIMITER); + if (sharingCameraOrMic && (id == "camera" || id == "microphone")) { + return true; + } + return types.includes(id); + }) + .forEach(perm => { + lazy.SitePermissions.removeFromPrincipal( + browser.contentPrincipal, + perm.id, + browser + ); + }); + + if (!sharingState?.windowId) { + return; + } + + // If the device of the permission we're clearing is currently active, + // tell the WebRTC implementation to stop sharing it. + let { windowId } = sharingState; + + let windowIds = []; + if (types.includes("screen") && sharingState.screen) { + windowIds.push(`screen:${windowId}`); + } + if (sharingCameraOrMic) { + windowIds.push(windowId); + } + + if (!windowIds.length) { + return; + } + + let actor = sharingState.browsingContext.currentWindowGlobal.getActor( + "WebRTC" + ); + + // Delete activePerms for all outerWindowIds under the current browser. We + // need to do this prior to sending the stopSharing message, so WebRTCParent + // can skip adding grace periods for these devices. + webrtcUI.forgetActivePermissionsFromBrowser(browser); + + windowIds.forEach(id => actor.sendAsyncMessage("webrtc:StopSharing", id)); + }, + + updateIndicators(aTopBrowsingContext) { + let tabState = this.getCombinedStateForBrowser(aTopBrowsingContext); + + let indicators; + if (this.perTabIndicators.has(aTopBrowsingContext)) { + indicators = this.perTabIndicators.get(aTopBrowsingContext); + } else { + indicators = {}; + this.perTabIndicators.set(aTopBrowsingContext, indicators); + } + + indicators.showCameraIndicator = tabState.showCameraIndicator; + indicators.showMicrophoneIndicator = tabState.showMicrophoneIndicator; + indicators.showScreenSharingIndicator = tabState.showScreenSharingIndicator; + this.updateGlobalIndicator(); + + return tabState; + }, + + swapBrowserForNotification(aOldBrowser, aNewBrowser) { + for (let stream of this._streams) { + if (stream.browser == aOldBrowser) { + stream.browser = aNewBrowser; + } + } + }, + + /** + * Remove all entries from the activePerms map for a browser, including all + * child frames. + * Note: activePerms is an internal WebRTC UI permission map and does not + * reflect the PermissionManager or SitePermissions state. + * @param aBrowser - Browser to clear active permissions for. + */ + forgetActivePermissionsFromBrowser(aBrowser) { + let browserWindowIds = aBrowser.browsingContext + .getAllBrowsingContextsInSubtree() + .map(bc => bc.currentWindowGlobal?.outerWindowId) + .filter(id => id != null); + browserWindowIds.push(aBrowser.outerWindowId); + browserWindowIds.forEach(id => this.activePerms.delete(id)); + }, + + /** + * Shows the Permission Panel for the tab associated with the provided + * active stream. + * @param aActiveStream - The stream that the user wants to see permissions for. + * @param aEvent - The user input event that is invoking the panel. This can be + * undefined / null if no such event exists. + */ + showSharingDoorhanger(aActiveStream, aEvent) { + let browserWindow = aActiveStream.browser.ownerGlobal; + if (aActiveStream.tab) { + browserWindow.gBrowser.selectedTab = aActiveStream.tab; + } else { + aActiveStream.browser.focus(); + } + browserWindow.focus(); + + if (AppConstants.platform == "macosx" && !Services.focus.activeWindow) { + browserWindow.addEventListener( + "activate", + function() { + Services.tm.dispatchToMainThread(function() { + browserWindow.gPermissionPanel.openPopup(aEvent); + }); + }, + { once: true } + ); + Cc["@mozilla.org/widget/macdocksupport;1"] + .getService(Ci.nsIMacDockSupport) + .activateApplication(true); + return; + } + browserWindow.gPermissionPanel.openPopup(aEvent); + }, + + updateWarningLabel(aMenuList) { + let type = aMenuList.selectedItem.getAttribute("devicetype"); + let document = aMenuList.ownerDocument; + document.getElementById("webRTC-all-windows-shared").hidden = + type != "screen"; + }, + + // Add-ons can override stock permission behavior by doing: + // + // webrtcUI.addPeerConnectionBlocker(function(aParams) { + // // new permission checking logic + // })); + // + // The blocking function receives an object with origin, callID, and windowID + // parameters. If it returns the string "deny" or a Promise that resolves + // to "deny", the connection is immediately blocked. With any other return + // value (though the string "allow" is suggested for consistency), control + // is passed to other registered blockers. If no registered blockers block + // the connection (or of course if there are no registered blockers), then + // the connection is allowed. + // + // Add-ons may also use webrtcUI.on/off to listen to events without + // blocking anything: + // peer-request-allowed is emitted when a new peer connection is + // established (and not blocked). + // peer-request-blocked is emitted when a peer connection request is + // blocked by some blocking connection handler. + // peer-request-cancel is emitted when a peer-request connection request + // is canceled. (This would typically be used in + // conjunction with a blocking handler to cancel + // a user prompt or other work done by the handler) + addPeerConnectionBlocker(aCallback) { + this.peerConnectionBlockers.add(aCallback); + }, + + removePeerConnectionBlocker(aCallback) { + this.peerConnectionBlockers.delete(aCallback); + }, + + on(...args) { + return this.emitter.on(...args); + }, + + off(...args) { + return this.emitter.off(...args); + }, + + getHostOrExtensionName(uri, href) { + let host; + try { + if (!uri) { + uri = Services.io.newURI(href); + } + + let addonPolicy = WebExtensionPolicy.getByURI(uri); + host = addonPolicy?.name ?? uri.hostPort; + } catch (ex) {} + + if (!host) { + if (uri && uri.scheme.toLowerCase() == "about") { + // For about URIs, just use the full spec, without any #hash parts. + host = uri.specIgnoringRef; + } else { + // This is unfortunate, but we should display *something*... + host = lazy.syncL10n.formatValueSync( + "webrtc-sharing-menuitem-unknown-host" + ); + } + } + return host; + }, + + updateGlobalIndicator() { + for (let chromeWin of Services.wm.getEnumerator("navigator:browser")) { + if (this.showGlobalIndicator) { + showOrCreateMenuForWindow(chromeWin); + } else { + let doc = chromeWin.document; + let existingMenu = doc.getElementById("tabSharingMenu"); + if (existingMenu) { + existingMenu.hidden = true; + } + if (AppConstants.platform == "macosx") { + let separator = doc.getElementById("tabSharingSeparator"); + if (separator) { + separator.hidden = true; + } + } + } + } + + if (this.showGlobalIndicator) { + if (!gIndicatorWindow) { + gIndicatorWindow = getGlobalIndicator(); + } else { + try { + gIndicatorWindow.updateIndicatorState(); + } catch (err) { + console.error( + `error in gIndicatorWindow.updateIndicatorState(): ${err.message}` + ); + } + } + } else if (gIndicatorWindow) { + if ( + !webrtcUI.useLegacyGlobalIndicator && + gIndicatorWindow.closingInternally + ) { + // Before calling .close(), we call .closingInternally() to allow us to + // differentiate between situations where the indicator closes because + // we no longer want to show the indicator (this case), and cases where + // the user has found a way to close the indicator via OS window control + // mechanisms. + gIndicatorWindow.closingInternally(); + } + gIndicatorWindow.close(); + gIndicatorWindow = null; + } + }, + + getWindowShareState(window) { + if (this.sharingScreen) { + return this.SHARING_SCREEN; + } else if (this.sharedBrowserWindows.has(window)) { + return this.SHARING_WINDOW; + } + return this.SHARING_NONE; + }, + + tabAddedWhileSharing(tab) { + this.allowedSharedBrowsers.add(tab.linkedBrowser.permanentKey); + }, + + shouldShowSharedTabWarning(tab) { + if (!tab || !tab.linkedBrowser) { + return false; + } + + let browser = tab.linkedBrowser; + // We want the user to be able to switch to one tab after starting + // to share their window or screen. The presumption here is that + // most users will have a single window with multiple tabs, where + // the selected tab will be the one with the screen or window + // sharing web application, and it's most likely that the contents + // that the user wants to share are in another tab that they'll + // switch to immediately upon sharing. These presumptions are based + // on research that our user research team did with users using + // video conferencing web applications. + if (!this.tabSwitchCountForSession) { + this.allowedSharedBrowsers.add(browser.permanentKey); + } + + this.tabSwitchCountForSession++; + let shouldShow = + !this.allowTabSwitchesForSession && + !this.allowedSharedBrowsers.has(browser.permanentKey); + + return shouldShow; + }, + + allowSharedTabSwitch(tab, allowForSession) { + let browser = tab.linkedBrowser; + let gBrowser = browser.getTabBrowser(); + this.allowedSharedBrowsers.add(browser.permanentKey); + gBrowser.selectedTab = tab; + this.allowTabSwitchesForSession = allowForSession; + }, + + recordEvent(type, object, args = {}) { + Services.telemetry.recordEvent( + "webrtc.ui", + type, + object, + this.sharingDisplaySessionId.toString(), + args + ); + }, + + /** + * Updates the sharedData structure to reflect shared screen and window + * state. This sets the following key: data pairs on sharedData. + * - "webrtcUI:isSharingScreen": a boolean value reflecting + * this.sharingScreen. + * - "webrtcUI:sharedTopInnerWindowIds": a set containing the inner window + * ids of each top level browser window that is in sharedBrowserWindows. + */ + _setSharedData() { + let sharedTopInnerWindowIds = new Set(); + for (let win of lazy.BrowserWindowTracker.orderedWindows) { + if (this.sharedBrowserWindows.has(win)) { + sharedTopInnerWindowIds.add( + win.browsingContext.currentWindowGlobal.innerWindowId + ); + } + } + Services.ppmm.sharedData.set( + "webrtcUI:isSharingScreen", + this.sharingScreen + ); + Services.ppmm.sharedData.set( + "webrtcUI:sharedTopInnerWindowIds", + sharedTopInnerWindowIds + ); + }, +}; + +function getGlobalIndicator() { + if (!webrtcUI.useLegacyGlobalIndicator) { + const INDICATOR_CHROME_URI = + "chrome://browser/content/webrtcIndicator.xhtml"; + let features = "chrome,titlebar=no,alwaysontop,minimizable=yes"; + + /* Don't use dialog on Gtk as it adds extra border and titlebar to indicator */ + if (!AppConstants.MOZ_WIDGET_GTK) { + features += ",dialog=yes"; + } + + return Services.ww.openWindow( + null, + INDICATOR_CHROME_URI, + "_blank", + features, + [] + ); + } + + if (AppConstants.platform != "macosx") { + const LEGACY_INDICATOR_CHROME_URI = + "chrome://browser/content/webrtcLegacyIndicator.xhtml"; + const features = "chrome,dialog=yes,titlebar=no,popup=yes"; + + return Services.ww.openWindow( + null, + LEGACY_INDICATOR_CHROME_URI, + "_blank", + features, + [] + ); + } + + return new MacOSWebRTCStatusbarIndicator(); +} + +/** + * Add a localized stream sharing menu to the event target + * + * @param {Window} win - The parent `window` + * @param {Event} event - The popupshowing event for the <menu>. + * @param {boolean} inclWindow - Should the window stream be included in the active streams. + */ +function showStreamSharingMenu(win, event, inclWindow = false) { + win.MozXULElement.insertFTLIfNeeded("browser/webrtcIndicator.ftl"); + const doc = win.document; + const menu = event.target; + + let type = menu.getAttribute("type"); + let activeStreams; + if (type == "Camera") { + activeStreams = webrtcUI.getActiveStreams(true, false, false); + } else if (type == "Microphone") { + activeStreams = webrtcUI.getActiveStreams(false, true, false); + } else if (type == "Screen") { + activeStreams = webrtcUI.getActiveStreams(false, false, true, inclWindow); + type = webrtcUI.showScreenSharingIndicator; + } + + if (!activeStreams.length) { + event.preventDefault(); + return; + } + + const l10nIds = SHARING_L10NID_BY_TYPE.get(type) ?? []; + if (activeStreams.length == 1) { + let stream = activeStreams[0]; + + const sharingItem = doc.createXULElement("menuitem"); + const streamTitle = stream.browser.contentTitle || stream.uri; + doc.l10n.setAttributes(sharingItem, l10nIds[0], { streamTitle }); + sharingItem.setAttribute("disabled", "true"); + menu.appendChild(sharingItem); + + const controlItem = doc.createXULElement("menuitem"); + doc.l10n.setAttributes( + controlItem, + "webrtc-indicator-menuitem-control-sharing" + ); + controlItem.stream = stream; + controlItem.addEventListener("command", this); + + menu.appendChild(controlItem); + } else { + // We show a different menu when there are several active streams. + const sharingItem = doc.createXULElement("menuitem"); + doc.l10n.setAttributes(sharingItem, l10nIds[1], { + tabCount: activeStreams.length, + }); + sharingItem.setAttribute("disabled", "true"); + menu.appendChild(sharingItem); + + for (let stream of activeStreams) { + const controlItem = doc.createXULElement("menuitem"); + const streamTitle = stream.browser.contentTitle || stream.uri; + doc.l10n.setAttributes( + controlItem, + "webrtc-indicator-menuitem-control-sharing-on", + { streamTitle } + ); + controlItem.stream = stream; + controlItem.addEventListener("command", this); + menu.appendChild(controlItem); + } + } +} + +/** + * Controls the visibility of screen, camera and microphone sharing indicators + * in the macOS global menu bar. This class should only ever be instantiated + * on macOS. + * + * The public methods on this class intentionally match the interface for the + * WebRTC global sharing indicator, because the MacOSWebRTCStatusbarIndicator + * acts as the indicator when in the legacy indicator configuration. + */ +class MacOSWebRTCStatusbarIndicator { + constructor() { + this._camera = null; + this._microphone = null; + this._screen = null; + + this._hiddenDoc = Services.appShell.hiddenDOMWindow.document; + this._statusBar = Cc["@mozilla.org/widget/systemstatusbar;1"].getService( + Ci.nsISystemStatusBar + ); + + this.updateIndicatorState(); + } + + /** + * Public method that will determine the most appropriate + * set of indicators to show, and then show them or hide + * them as necessary. + */ + updateIndicatorState() { + this._setIndicatorState("Camera", webrtcUI.showCameraIndicator); + this._setIndicatorState("Microphone", webrtcUI.showMicrophoneIndicator); + this._setIndicatorState("Screen", webrtcUI.showScreenSharingIndicator); + } + + /** + * Public method that will hide all indicators. + */ + close() { + this._setIndicatorState("Camera", false); + this._setIndicatorState("Microphone", false); + this._setIndicatorState("Screen", false); + } + + handleEvent(event) { + switch (event.type) { + case "popupshowing": { + this._popupShowing(event); + break; + } + case "popuphiding": { + this._popupHiding(event); + break; + } + case "command": { + this._command(event); + break; + } + } + } + + /** + * Handler for command events fired by the <menuitem> elements + * inside any of the indicator <menu>'s. + * + * @param {Event} aEvent - The command event for the <menuitem>. + */ + _command(aEvent) { + webrtcUI.showSharingDoorhanger(aEvent.target.stream, aEvent); + } + + /** + * Handler for the popupshowing event for one of the status + * bar indicator menus. + * + * @param {Event} aEvent - The popupshowing event for the <menu>. + */ + _popupShowing(aEvent) { + const menu = aEvent.target; + showStreamSharingMenu(menu.ownerGlobal, aEvent); + return true; + } + + /** + * Handler for the popuphiding event for one of the status + * bar indicator menus. + * + * @param {Event} aEvent - The popuphiding event for the <menu>. + */ + _popupHiding(aEvent) { + let menu = aEvent.target; + while (menu.firstChild) { + menu.firstChild.remove(); + } + } + + /** + * Updates the status bar to show or hide a screen, camera or + * microphone indicator. + * + * @param {String} aName - One of the following: "screen", "camera", + * "microphone" + * @param {boolean} aState - True to show the indicator for the aName + * type of stream, false ot hide it. + */ + _setIndicatorState(aName, aState) { + let field = "_" + aName.toLowerCase(); + if (aState && !this[field]) { + let menu = this._hiddenDoc.createXULElement("menu"); + menu.setAttribute("id", "webRTC-sharing" + aName + "-menu"); + + // The CSS will only be applied if the menu is actually inserted in the DOM. + this._hiddenDoc.documentElement.appendChild(menu); + + this._statusBar.addItem(menu); + + let menupopup = this._hiddenDoc.createXULElement("menupopup"); + menupopup.setAttribute("type", aName); + menupopup.addEventListener("popupshowing", this); + menupopup.addEventListener("popuphiding", this); + menupopup.addEventListener("command", this); + menu.appendChild(menupopup); + + this[field] = menu; + } else if (this[field] && !aState) { + this._statusBar.removeItem(this[field]); + this[field].remove(); + this[field] = null; + } + } +} + +function onTabSharingMenuPopupShowing(e) { + const streams = webrtcUI.getActiveStreams(true, true, true); + for (let streamInfo of streams) { + const names = streamInfo.devices.map(({ mediaSource }) => { + const l10nId = MEDIA_SOURCE_L10NID_BY_TYPE.get(mediaSource); + return l10nId ? lazy.syncL10n.formatValueSync(l10nId) : mediaSource; + }); + + const doc = e.target.ownerDocument; + const menuitem = doc.createXULElement("menuitem"); + doc.l10n.setAttributes(menuitem, "webrtc-sharing-menuitem", { + origin: webrtcUI.getHostOrExtensionName(null, streamInfo.uri), + itemList: lazy.listFormat.format(names), + }); + menuitem.stream = streamInfo; + menuitem.addEventListener("command", onTabSharingMenuPopupCommand); + e.target.appendChild(menuitem); + } +} + +function onTabSharingMenuPopupHiding(e) { + while (this.lastChild) { + this.lastChild.remove(); + } +} + +function onTabSharingMenuPopupCommand(e) { + webrtcUI.showSharingDoorhanger(e.target.stream, e); +} + +function showOrCreateMenuForWindow(aWindow) { + let document = aWindow.document; + let menu = document.getElementById("tabSharingMenu"); + if (!menu) { + menu = document.createXULElement("menu"); + menu.id = "tabSharingMenu"; + document.l10n.setAttributes(menu, "webrtc-sharing-menu"); + + let container, insertionPoint; + if (AppConstants.platform == "macosx") { + container = document.getElementById("menu_ToolsPopup"); + insertionPoint = document.getElementById("devToolsSeparator"); + let separator = document.createXULElement("menuseparator"); + separator.id = "tabSharingSeparator"; + container.insertBefore(separator, insertionPoint); + } else { + container = document.getElementById("main-menubar"); + insertionPoint = document.getElementById("helpMenu"); + } + let popup = document.createXULElement("menupopup"); + popup.id = "tabSharingMenuPopup"; + popup.addEventListener("popupshowing", onTabSharingMenuPopupShowing); + popup.addEventListener("popuphiding", onTabSharingMenuPopupHiding); + menu.appendChild(popup); + container.insertBefore(menu, insertionPoint); + } else { + menu.hidden = false; + if (AppConstants.platform == "macosx") { + document.getElementById("tabSharingSeparator").hidden = false; + } + } +} + +var gIndicatorWindow = null; |