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Diffstat (limited to 'browser/modules/WindowsPreviewPerTab.jsm')
| -rw-r--r-- | browser/modules/WindowsPreviewPerTab.jsm | 862 |
1 files changed, 0 insertions, 862 deletions
diff --git a/browser/modules/WindowsPreviewPerTab.jsm b/browser/modules/WindowsPreviewPerTab.jsm deleted file mode 100644 index 6586b5d3b..000000000 --- a/browser/modules/WindowsPreviewPerTab.jsm +++ /dev/null @@ -1,862 +0,0 @@ -/* vim: se cin sw=2 ts=2 et filetype=javascript : - * 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/. */ -/* - * This module implements the front end behavior for AeroPeek. Starting in - * Windows Vista, the taskbar began showing live thumbnail previews of windows - * when the user hovered over the window icon in the taskbar. Starting with - * Windows 7, the taskbar allows an application to expose its tabbed interface - * in the taskbar by showing thumbnail previews rather than the default window - * preview. Additionally, when a user hovers over a thumbnail (tab or window), - * they are shown a live preview of the window (or tab + its containing window). - * - * In Windows 7, a title, icon, close button and optional toolbar are shown for - * each preview. This feature does not make use of the toolbar. For window - * previews, the title is the window title and the icon the window icon. For - * tab previews, the title is the page title and the page's favicon. In both - * cases, the close button "does the right thing." - * - * The primary objects behind this feature are nsITaskbarTabPreview and - * nsITaskbarPreviewController. Each preview has a controller. The controller - * responds to the user's interactions on the taskbar and provides the required - * data to the preview for determining the size of the tab and thumbnail. The - * PreviewController class implements this interface. The preview will request - * the controller to provide a thumbnail or preview when the user interacts with - * the taskbar. To reduce the overhead of drawing the tab area, the controller - * implementation caches the tab's contents in a <canvas> element. If no - * previews or thumbnails have been requested for some time, the controller will - * discard its cached tab contents. - * - * Screen real estate is limited so when there are too many thumbnails to fit - * on the screen, the taskbar stops displaying thumbnails and instead displays - * just the title, icon and close button in a similar fashion to previous - * versions of the taskbar. If there are still too many previews to fit on the - * screen, the taskbar resorts to a scroll up and scroll down button pair to let - * the user scroll through the list of tabs. Since this is undoubtedly - * inconvenient for users with many tabs, the AeroPeek objects turns off all of - * the tab previews. This tells the taskbar to revert to one preview per window. - * If the number of tabs falls below this magic threshold, the preview-per-tab - * behavior returns. There is no reliable way to determine when the scroll - * buttons appear on the taskbar, so a magic pref-controlled number determines - * when this threshold has been crossed. - */ -this.EXPORTED_SYMBOLS = ["AeroPeek"]; - -const Cc = Components.classes; -const Ci = Components.interfaces; -const Cu = Components.utils; - -Cu.import("resource://gre/modules/NetUtil.jsm"); -Cu.import("resource://gre/modules/PlacesUtils.jsm"); -Cu.import("resource://gre/modules/PrivateBrowsingUtils.jsm"); -Cu.import("resource://gre/modules/Services.jsm"); -Cu.import("resource://gre/modules/XPCOMUtils.jsm"); - -// Pref to enable/disable preview-per-tab -const TOGGLE_PREF_NAME = "browser.taskbar.previews.enable"; -// Pref to determine the magic auto-disable threshold -const DISABLE_THRESHOLD_PREF_NAME = "browser.taskbar.previews.max"; -// Pref to control the time in seconds that tab contents live in the cache -const CACHE_EXPIRATION_TIME_PREF_NAME = "browser.taskbar.previews.cachetime"; - -const WINTASKBAR_CONTRACTID = "@mozilla.org/windows-taskbar;1"; - -// Various utility properties -XPCOMUtils.defineLazyServiceGetter(this, "imgTools", - "@mozilla.org/image/tools;1", - "imgITools"); -XPCOMUtils.defineLazyModuleGetter(this, "PageThumbs", - "resource://gre/modules/PageThumbs.jsm"); - -// nsIURI -> imgIContainer -function _imageFromURI(uri, privateMode, callback) { - let channel = NetUtil.newChannel({ - uri: uri, - loadUsingSystemPrincipal: true, - contentPolicyType: Ci.nsIContentPolicy.TYPE_INTERNAL_IMAGE - }); - - try { - channel.QueryInterface(Ci.nsIPrivateBrowsingChannel); - channel.setPrivate(privateMode); - } catch (e) { - // Ignore channels which do not support nsIPrivateBrowsingChannel - } - NetUtil.asyncFetch(channel, function(inputStream, resultCode) { - if (!Components.isSuccessCode(resultCode)) - return; - try { - let out_img = { value: null }; - imgTools.decodeImageData(inputStream, channel.contentType, out_img); - callback(out_img.value); - } catch (e) { - // We failed, so use the default favicon (only if this wasn't the default - // favicon). - let defaultURI = PlacesUtils.favicons.defaultFavicon; - if (!defaultURI.equals(uri)) - _imageFromURI(defaultURI, privateMode, callback); - } - }); -} - -// string? -> imgIContainer -function getFaviconAsImage(iconurl, privateMode, callback) { - if (iconurl) { - _imageFromURI(NetUtil.newURI(iconurl), privateMode, callback); - } else { - _imageFromURI(PlacesUtils.favicons.defaultFavicon, privateMode, callback); - } -} - -// Snaps the given rectangle to be pixel-aligned at the given scale -function snapRectAtScale(r, scale) { - let x = Math.floor(r.x * scale); - let y = Math.floor(r.y * scale); - let width = Math.ceil((r.x + r.width) * scale) - x; - let height = Math.ceil((r.y + r.height) * scale) - y; - - r.x = x / scale; - r.y = y / scale; - r.width = width / scale; - r.height = height / scale; -} - -// PreviewController - -/* - * This class manages the behavior of thumbnails and previews. It has the following - * responsibilities: - * 1) responding to requests from Windows taskbar for a thumbnail or window - * preview. - * 2) listens for dom events that result in a thumbnail or window preview needing - * to be refresh, and communicates this to the taskbar. - * 3) Handles querying and returning to the taskbar new thumbnail or window - * preview images through PageThumbs. - * - * @param win - * The TabWindow (see below) that owns the preview that this controls - * @param tab - * The <tab> that this preview is associated with - */ -function PreviewController(win, tab) { - this.win = win; - this.tab = tab; - this.linkedBrowser = tab.linkedBrowser; - this.preview = this.win.createTabPreview(this); - - this.tab.addEventListener("TabAttrModified", this, false); - - XPCOMUtils.defineLazyGetter(this, "canvasPreview", function () { - let canvas = PageThumbs.createCanvas(); - canvas.mozOpaque = true; - return canvas; - }); -} - -PreviewController.prototype = { - QueryInterface: XPCOMUtils.generateQI([Ci.nsITaskbarPreviewController, - Ci.nsIDOMEventListener]), - - destroy: function () { - this.tab.removeEventListener("TabAttrModified", this, false); - - // Break cycles, otherwise we end up leaking the window with everything - // attached to it. - delete this.win; - delete this.preview; - }, - - get wrappedJSObject() { - return this; - }, - - // Resizes the canvasPreview to 0x0, essentially freeing its memory. - resetCanvasPreview: function () { - this.canvasPreview.width = 0; - this.canvasPreview.height = 0; - }, - - /** - * Set the canvas dimensions. - */ - resizeCanvasPreview: function (aRequestedWidth, aRequestedHeight) { - this.canvasPreview.width = aRequestedWidth; - this.canvasPreview.height = aRequestedHeight; - }, - - - get zoom() { - // Note that winutils.fullZoom accounts for "quantization" of the zoom factor - // from nsIContentViewer due to conversion through appUnits. - // We do -not- want screenPixelsPerCSSPixel here, because that would -also- - // incorporate any scaling that is applied due to hi-dpi resolution options. - return this.tab.linkedBrowser.fullZoom; - }, - - get screenPixelsPerCSSPixel() { - let chromeWin = this.tab.ownerGlobal; - let windowUtils = chromeWin.getInterface(Ci.nsIDOMWindowUtils); - return windowUtils.screenPixelsPerCSSPixel; - }, - - get browserDims() { - return this.tab.linkedBrowser.getBoundingClientRect(); - }, - - cacheBrowserDims: function () { - let dims = this.browserDims; - this._cachedWidth = dims.width; - this._cachedHeight = dims.height; - }, - - testCacheBrowserDims: function () { - let dims = this.browserDims; - return this._cachedWidth == dims.width && - this._cachedHeight == dims.height; - }, - - /** - * Capture a new thumbnail image for this preview. Called by the controller - * in response to a request for a new thumbnail image. - */ - updateCanvasPreview: function (aFullScale, aCallback) { - // Update our cached browser dims so that delayed resize - // events don't trigger another invalidation if this tab becomes active. - this.cacheBrowserDims(); - PageThumbs.captureToCanvas(this.linkedBrowser, this.canvasPreview, - aCallback, { fullScale: aFullScale }); - // If we're updating the canvas, then we're in the middle of a peek so - // don't discard the cache of previews. - AeroPeek.resetCacheTimer(); - }, - - updateTitleAndTooltip: function () { - let title = this.win.tabbrowser.getWindowTitleForBrowser(this.linkedBrowser); - this.preview.title = title; - this.preview.tooltip = title; - }, - - // nsITaskbarPreviewController - - // window width and height, not browser - get width() { - return this.win.width; - }, - - // window width and height, not browser - get height() { - return this.win.height; - }, - - get thumbnailAspectRatio() { - let browserDims = this.browserDims; - // Avoid returning 0 - let tabWidth = browserDims.width || 1; - // Avoid divide by 0 - let tabHeight = browserDims.height || 1; - return tabWidth / tabHeight; - }, - - /** - * Responds to taskbar requests for window previews. Returns the results asynchronously - * through updateCanvasPreview. - * - * @param aTaskbarCallback nsITaskbarPreviewCallback results callback - */ - requestPreview: function (aTaskbarCallback) { - // Grab a high res content preview - this.resetCanvasPreview(); - this.updateCanvasPreview(true, (aPreviewCanvas) => { - let winWidth = this.win.width; - let winHeight = this.win.height; - - let composite = PageThumbs.createCanvas(); - - // Use transparency, Aero glass is drawn black without it. - composite.mozOpaque = false; - - let ctx = composite.getContext('2d'); - let scale = this.screenPixelsPerCSSPixel / this.zoom; - - composite.width = winWidth * scale; - composite.height = winHeight * scale; - - ctx.save(); - ctx.scale(scale, scale); - - // Draw chrome. Note we currently do not get scrollbars for remote frames - // in the image above. - ctx.drawWindow(this.win.win, 0, 0, winWidth, winHeight, "rgba(0,0,0,0)"); - - // Draw the content are into the composite canvas at the right location. - ctx.drawImage(aPreviewCanvas, this.browserDims.x, this.browserDims.y, - aPreviewCanvas.width, aPreviewCanvas.height); - ctx.restore(); - - // Deliver the resulting composite canvas to Windows - this.win.tabbrowser.previewTab(this.tab, function () { - aTaskbarCallback.done(composite, false); - }); - }); - }, - - /** - * Responds to taskbar requests for tab thumbnails. Returns the results asynchronously - * through updateCanvasPreview. - * - * Note Windows requests a specific width and height here, if the resulting thumbnail - * does not match these dimensions thumbnail display will fail. - * - * @param aTaskbarCallback nsITaskbarPreviewCallback results callback - * @param aRequestedWidth width of the requested thumbnail - * @param aRequestedHeight height of the requested thumbnail - */ - requestThumbnail: function (aTaskbarCallback, aRequestedWidth, aRequestedHeight) { - this.resizeCanvasPreview(aRequestedWidth, aRequestedHeight); - this.updateCanvasPreview(false, (aThumbnailCanvas) => { - aTaskbarCallback.done(aThumbnailCanvas, false); - }); - }, - - // Event handling - - onClose: function () { - this.win.tabbrowser.removeTab(this.tab); - }, - - onActivate: function () { - this.win.tabbrowser.selectedTab = this.tab; - - // Accept activation - this will restore the browser window - // if it's minimized - return true; - }, - - // nsIDOMEventListener - handleEvent: function (evt) { - switch (evt.type) { - case "TabAttrModified": - this.updateTitleAndTooltip(); - break; - } - } -}; - -XPCOMUtils.defineLazyGetter(PreviewController.prototype, "canvasPreviewFlags", - function () { let canvasInterface = Ci.nsIDOMCanvasRenderingContext2D; - return canvasInterface.DRAWWINDOW_DRAW_VIEW - | canvasInterface.DRAWWINDOW_DRAW_CARET - | canvasInterface.DRAWWINDOW_ASYNC_DECODE_IMAGES - | canvasInterface.DRAWWINDOW_DO_NOT_FLUSH; -}); - -// TabWindow - -/* - * This class monitors a browser window for changes to its tabs - * - * @param win - * The nsIDOMWindow browser window - */ -function TabWindow(win) { - this.win = win; - this.tabbrowser = win.gBrowser; - - this.previews = new Map(); - - for (let i = 0; i < this.tabEvents.length; i++) - this.tabbrowser.tabContainer.addEventListener(this.tabEvents[i], this, false); - - for (let i = 0; i < this.winEvents.length; i++) - this.win.addEventListener(this.winEvents[i], this, false); - - this.tabbrowser.addTabsProgressListener(this); - - AeroPeek.windows.push(this); - let tabs = this.tabbrowser.tabs; - for (let i = 0; i < tabs.length; i++) - this.newTab(tabs[i]); - - this.updateTabOrdering(); - AeroPeek.checkPreviewCount(); -} - -TabWindow.prototype = { - _enabled: false, - _cachedWidth: 0, - _cachedHeight: 0, - tabEvents: ["TabOpen", "TabClose", "TabSelect", "TabMove"], - winEvents: ["resize"], - - destroy: function () { - this._destroying = true; - - let tabs = this.tabbrowser.tabs; - - this.tabbrowser.removeTabsProgressListener(this); - - for (let i = 0; i < this.winEvents.length; i++) - this.win.removeEventListener(this.winEvents[i], this, false); - - for (let i = 0; i < this.tabEvents.length; i++) - this.tabbrowser.tabContainer.removeEventListener(this.tabEvents[i], this, false); - - for (let i = 0; i < tabs.length; i++) - this.removeTab(tabs[i]); - - let idx = AeroPeek.windows.indexOf(this.win.gTaskbarTabGroup); - AeroPeek.windows.splice(idx, 1); - AeroPeek.checkPreviewCount(); - }, - - get width () { - return this.win.innerWidth; - }, - get height () { - return this.win.innerHeight; - }, - - cacheDims: function () { - this._cachedWidth = this.width; - this._cachedHeight = this.height; - }, - - testCacheDims: function () { - return this._cachedWidth == this.width && this._cachedHeight == this.height; - }, - - // Invoked when the given tab is added to this window - newTab: function (tab) { - let controller = new PreviewController(this, tab); - // It's OK to add the preview now while the favicon still loads. - this.previews.set(tab, controller.preview); - AeroPeek.addPreview(controller.preview); - // updateTitleAndTooltip relies on having controller.preview which is lazily resolved. - // Now that we've updated this.previews, it will resolve successfully. - controller.updateTitleAndTooltip(); - }, - - createTabPreview: function (controller) { - let docShell = this.win - .QueryInterface(Ci.nsIInterfaceRequestor) - .getInterface(Ci.nsIWebNavigation) - .QueryInterface(Ci.nsIDocShell); - let preview = AeroPeek.taskbar.createTaskbarTabPreview(docShell, controller); - preview.visible = AeroPeek.enabled; - preview.active = this.tabbrowser.selectedTab == controller.tab; - this.onLinkIconAvailable(controller.tab.linkedBrowser, - controller.tab.getAttribute("image")); - return preview; - }, - - // Invoked when the given tab is closed - removeTab: function (tab) { - let preview = this.previewFromTab(tab); - preview.active = false; - preview.visible = false; - preview.move(null); - preview.controller.wrappedJSObject.destroy(); - - this.previews.delete(tab); - AeroPeek.removePreview(preview); - }, - - get enabled () { - return this._enabled; - }, - - set enabled (enable) { - this._enabled = enable; - // Because making a tab visible requires that the tab it is next to be - // visible, it is far simpler to unset the 'next' tab and recreate them all - // at once. - for (let [, preview] of this.previews) { - preview.move(null); - preview.visible = enable; - } - this.updateTabOrdering(); - }, - - previewFromTab: function (tab) { - return this.previews.get(tab); - }, - - updateTabOrdering: function () { - let previews = this.previews; - let tabs = this.tabbrowser.tabs; - - // Previews are internally stored using a map, so we need to iterate the - // tabbrowser's array of tabs to retrieve previews in the same order. - let inorder = []; - for (let t of tabs) { - if (previews.has(t)) { - inorder.push(previews.get(t)); - } - } - - // Since the internal taskbar array has not yet been updated we must force - // on it the sorting order of our local array. To do so we must walk - // the local array backwards, otherwise we would send move requests in the - // wrong order. See bug 522610 for details. - for (let i = inorder.length - 1; i >= 0; i--) { - inorder[i].move(inorder[i + 1] || null); - } - }, - - // nsIDOMEventListener - handleEvent: function (evt) { - let tab = evt.originalTarget; - switch (evt.type) { - case "TabOpen": - this.newTab(tab); - this.updateTabOrdering(); - break; - case "TabClose": - this.removeTab(tab); - this.updateTabOrdering(); - break; - case "TabSelect": - this.previewFromTab(tab).active = true; - break; - case "TabMove": - this.updateTabOrdering(); - break; - case "resize": - if (!AeroPeek._prefenabled) - return; - this.onResize(); - break; - } - }, - - // Set or reset a timer that will invalidate visible thumbnails soon. - setInvalidationTimer: function () { - if (!this.invalidateTimer) { - this.invalidateTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer); - } - this.invalidateTimer.cancel(); - - // delay 1 second before invalidating - this.invalidateTimer.initWithCallback(() => { - // invalidate every preview. note the internal implementation of - // invalidate ignores thumbnails that aren't visible. - this.previews.forEach(function (aPreview) { - let controller = aPreview.controller.wrappedJSObject; - if (!controller.testCacheBrowserDims()) { - controller.cacheBrowserDims(); - aPreview.invalidate(); - } - }); - }, 1000, Ci.nsITimer.TYPE_ONE_SHOT); - }, - - onResize: function () { - // Specific to a window. - - // Call invalidate on each tab thumbnail so that Windows will request an - // updated image. However don't do this repeatedly across multiple resize - // events triggered during window border drags. - - if (this.testCacheDims()) { - return; - } - - // update the window dims on our TabWindow object. - this.cacheDims(); - - // invalidate soon - this.setInvalidationTimer(); - }, - - invalidateTabPreview: function(aBrowser) { - for (let [tab, preview] of this.previews) { - if (aBrowser == tab.linkedBrowser) { - preview.invalidate(); - break; - } - } - }, - - // Browser progress listener - - onLocationChange: function (aBrowser) { - // I'm not sure we need this, onStateChange does a really good job - // of picking up page changes. - // this.invalidateTabPreview(aBrowser); - }, - - onStateChange: function (aBrowser, aWebProgress, aRequest, aStateFlags, aStatus) { - if (aStateFlags & Ci.nsIWebProgressListener.STATE_STOP && - aStateFlags & Ci.nsIWebProgressListener.STATE_IS_NETWORK) { - this.invalidateTabPreview(aBrowser); - } - }, - - directRequestProtocols: new Set([ - "file", "chrome", "resource", "about" - ]), - onLinkIconAvailable: function (aBrowser, aIconURL) { - let requestURL = null; - if (aIconURL) { - let shouldRequestFaviconURL = true; - try { - let urlObject = NetUtil.newURI(aIconURL); - shouldRequestFaviconURL = - !this.directRequestProtocols.has(urlObject.scheme); - } catch (ex) {} - - requestURL = shouldRequestFaviconURL ? - "moz-anno:favicon:" + aIconURL : - aIconURL; - } - let isDefaultFavicon = !requestURL; - getFaviconAsImage( - requestURL, - PrivateBrowsingUtils.isWindowPrivate(this.win), - img => { - let index = this.tabbrowser.browsers.indexOf(aBrowser); - // Only add it if we've found the index and the URI is still the same. - // The tab could have closed, and there's no guarantee the icons - // will have finished fetching 'in order'. - if (index != -1) { - let tab = this.tabbrowser.tabs[index]; - let preview = this.previews.get(tab); - if (tab.getAttribute("image") == aIconURL || - (!preview.icon && isDefaultFavicon)) { - preview.icon = img; - } - } - } - ); - } -} - -// AeroPeek - -/* - * This object acts as global storage and external interface for this feature. - * It maintains the values of the prefs. - */ -this.AeroPeek = { - available: false, - // Does the pref say we're enabled? - __prefenabled: false, - - _enabled: true, - - initialized: false, - - // nsITaskbarTabPreview array - previews: [], - - // TabWindow array - windows: [], - - // nsIWinTaskbar service - taskbar: null, - - // Maximum number of previews - maxpreviews: 20, - - // Length of time in seconds that previews are cached - cacheLifespan: 20, - - initialize: function () { - if (!(WINTASKBAR_CONTRACTID in Cc)) - return; - this.taskbar = Cc[WINTASKBAR_CONTRACTID].getService(Ci.nsIWinTaskbar); - this.available = this.taskbar.available; - if (!this.available) - return; - - this.prefs.addObserver(TOGGLE_PREF_NAME, this, true); - this.enabled = this._prefenabled = this.prefs.getBoolPref(TOGGLE_PREF_NAME); - this.initialized = true; - }, - - destroy: function destroy() { - this._enabled = false; - - if (this.cacheTimer) - this.cacheTimer.cancel(); - }, - - get enabled() { - return this._enabled; - }, - - set enabled(enable) { - if (this._enabled == enable) - return; - - this._enabled = enable; - - this.windows.forEach(function (win) { - win.enabled = enable; - }); - }, - - get _prefenabled() { - return this.__prefenabled; - }, - - set _prefenabled(enable) { - if (enable == this.__prefenabled) { - return; - } - this.__prefenabled = enable; - - if (enable) { - this.enable(); - } else { - this.disable(); - } - }, - - _observersAdded: false, - - enable() { - if (!this._observersAdded) { - this.prefs.addObserver(DISABLE_THRESHOLD_PREF_NAME, this, true); - this.prefs.addObserver(CACHE_EXPIRATION_TIME_PREF_NAME, this, true); - PlacesUtils.history.addObserver(this, true); - this._observersAdded = true; - } - - this.cacheLifespan = this.prefs.getIntPref(CACHE_EXPIRATION_TIME_PREF_NAME); - - this.maxpreviews = this.prefs.getIntPref(DISABLE_THRESHOLD_PREF_NAME); - - // If the user toggled us on/off while the browser was already up - // (rather than this code running on startup because the pref was - // already set to true), we must initialize previews for open windows: - if (this.initialized) { - let browserWindows = Services.wm.getEnumerator("navigator:browser"); - while (browserWindows.hasMoreElements()) { - let win = browserWindows.getNext(); - if (!win.closed) { - this.onOpenWindow(win); - } - } - } - }, - - disable() { - while (this.windows.length) { - // We can't call onCloseWindow here because it'll bail if we're not - // enabled. - let tabWinObject = this.windows[0]; - tabWinObject.destroy(); // This will remove us from the array. - delete tabWinObject.win.gTaskbarTabGroup; // Tidy up the window. - } - }, - - addPreview: function (preview) { - this.previews.push(preview); - this.checkPreviewCount(); - }, - - removePreview: function (preview) { - let idx = this.previews.indexOf(preview); - this.previews.splice(idx, 1); - this.checkPreviewCount(); - }, - - checkPreviewCount: function () { - if (!this._prefenabled) { - return; - } - this.enabled = this.previews.length <= this.maxpreviews; - }, - - onOpenWindow: function (win) { - // This occurs when the taskbar service is not available (xp, vista) - if (!this.available || !this._prefenabled) - return; - - win.gTaskbarTabGroup = new TabWindow(win); - }, - - onCloseWindow: function (win) { - // This occurs when the taskbar service is not available (xp, vista) - if (!this.available || !this._prefenabled) - return; - - win.gTaskbarTabGroup.destroy(); - delete win.gTaskbarTabGroup; - - if (this.windows.length == 0) - this.destroy(); - }, - - resetCacheTimer: function () { - this.cacheTimer.cancel(); - this.cacheTimer.init(this, 1000*this.cacheLifespan, Ci.nsITimer.TYPE_ONE_SHOT); - }, - - // nsIObserver - observe: function (aSubject, aTopic, aData) { - if (aTopic == "nsPref:changed" && aData == TOGGLE_PREF_NAME) { - this._prefenabled = this.prefs.getBoolPref(TOGGLE_PREF_NAME); - } - if (!this._prefenabled) { - return; - } - switch (aTopic) { - case "nsPref:changed": - if (aData == CACHE_EXPIRATION_TIME_PREF_NAME) - break; - - if (aData == DISABLE_THRESHOLD_PREF_NAME) - this.maxpreviews = this.prefs.getIntPref(DISABLE_THRESHOLD_PREF_NAME); - // Might need to enable/disable ourselves - this.checkPreviewCount(); - break; - case "timer-callback": - this.previews.forEach(function (preview) { - let controller = preview.controller.wrappedJSObject; - controller.resetCanvasPreview(); - }); - break; - } - }, - - /* nsINavHistoryObserver implementation */ - onBeginUpdateBatch() {}, - onEndUpdateBatch() {}, - onVisit() {}, - onTitleChanged() {}, - onFrecencyChanged() {}, - onManyFrecenciesChanged() {}, - onDeleteURI() {}, - onClearHistory() {}, - onDeleteVisits() {}, - onPageChanged(uri, changedConst, newValue) { - if (this.enabled && changedConst == Ci.nsINavHistoryObserver.ATTRIBUTE_FAVICON) { - for (let win of this.windows) { - for (let [tab, ] of win.previews) { - if (tab.getAttribute("image") == newValue) { - win.onLinkIconAvailable(tab.linkedBrowser, newValue); - } - } - } - } - }, - - QueryInterface: XPCOMUtils.generateQI([ - Ci.nsISupportsWeakReference, - Ci.nsINavHistoryObserver, - Ci.nsIObserver - ]), -}; - -XPCOMUtils.defineLazyGetter(AeroPeek, "cacheTimer", () => - Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer) -); - -XPCOMUtils.defineLazyServiceGetter(AeroPeek, "prefs", - "@mozilla.org/preferences-service;1", - "nsIPrefBranch"); - -AeroPeek.initialize(); |