Instant: Use only one hidden WebContents per profile.

chrome/browser/ui/gtk/tab_contents_container_gtk.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/gtk/tab_contents_container_gtk.h"
 
 #include <algorithm>
 
 #include "base/i18n/rtl.h"
 #include "chrome/browser/ui/gtk/status_bubble_gtk.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view.h"
 #include "ui/base/gtk/gtk_expanded_container.h"
 #include "ui/base/gtk/gtk_floating_container.h"
 #include "ui/gfx/native_widget_types.h"
 
 TabContentsContainerGtk::TabContentsContainerGtk(StatusBubbleGtk* status_bubble)
     : tab_(NULL),
-      preview_(NULL),
+      overlay_(NULL),
       status_bubble_(status_bubble) {
   Init();
 }
 
 TabContentsContainerGtk::~TabContentsContainerGtk() {
   floating_.Destroy();
 }
 
 void TabContentsContainerGtk::Init() {
   // A high level overview of the TabContentsContainer:
@@ skipping 32 matching lines @@
 void TabContentsContainerGtk::SetTab(content::WebContents* tab) {
   if (tab_ == tab)
     return;
 
   if (tab_)
     HideTab(tab_);
 
   tab_ = tab;
 
   if (tab_) {
-    // If the preview is becoming the new permanent tab, we just reassign some
+    // If the overlay is becoming the new permanent tab, we just reassign some
     // pointers. Otherwise, we have to actually add it to the widget hierarchy.
-    if (tab_ == preview_)
-      preview_ = NULL;
+    if (tab_ == overlay_)
+      overlay_ = NULL;
     else
       PackTab(tab_);
 
     // Make sure that the tab is below the find bar. Sometimes the content
     // native view will be null.
     GtkWidget* widget = tab_->GetView()->GetContentNativeView();
     if (widget) {
       GdkWindow* content_gdk_window = gtk_widget_get_window(widget);
       if (content_gdk_window)
         gdk_window_lower(content_gdk_window);
     }
   }
 }
 
-void TabContentsContainerGtk::SetPreview(content::WebContents* preview) {
-  if (preview_ == preview)
+void TabContentsContainerGtk::SetOverlay(content::WebContents* overlay) {
+  if (overlay_ == overlay)
     return;
 
-  if (preview_) {
-    HideTab(preview_);
-    GtkWidget* preview_widget = preview_->GetView()->GetNativeView();
-    if (preview_widget)
-      gtk_container_remove(GTK_CONTAINER(expanded_), preview_widget);
+  if (overlay_) {
+    HideTab(overlay_);
+    GtkWidget* overlay_widget = overlay_->GetView()->GetNativeView();
+    if (overlay_widget)
+      gtk_container_remove(GTK_CONTAINER(expanded_), overlay_widget);
   }
 
-  preview_ = preview;
+  overlay_ = overlay;
 
-  if (preview_)
-    PackTab(preview_);
+  if (overlay_)
+    PackTab(overlay_);
 }
 
 void TabContentsContainerGtk::PackTab(content::WebContents* tab) {
   gfx::NativeView widget = tab->GetView()->GetNativeView();
   if (widget) {
     if (gtk_widget_get_parent(widget) != expanded_)
       gtk_container_add(GTK_CONTAINER(expanded_), widget);
     gtk_widget_show(widget);
   }
 
@@ skipping 31 matching lines @@
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   DCHECK_EQ(content::NOTIFICATION_WEB_CONTENTS_DESTROYED, type);
   WebContentsDestroyed(content::Source<content::WebContents>(source).ptr());
 }
 
 void TabContentsContainerGtk::WebContentsDestroyed(
     content::WebContents* contents) {
   // Sometimes, a WebContents is destroyed before we know about it. This allows
   // us to clean up our state in case this happens.
-  if (contents == preview_)
-    SetPreview(NULL);
+  if (contents == overlay_)
+    SetOverlay(NULL);
   else if (contents == tab_)
     SetTab(NULL);
   else
     NOTREACHED();
 }
 
-// Prevent |preview_| from getting focus via the tab key. If |tab_| exists, try
+// Prevent |overlay_| from getting focus via the tab key. If |tab_| exists, try
 // to focus that. Otherwise, do nothing, but stop event propagation. See bug
 // http://crbug.com/63365
 gboolean TabContentsContainerGtk::OnFocus(GtkWidget* widget,
                                           GtkDirectionType focus) {
-  if (preview_) {
+  if (overlay_) {
     gtk_widget_child_focus(tab_->GetView()->GetContentNativeView(), focus);
     return TRUE;
   }
 
-  // No preview contents; let the default handler run.
+  // No overlay contents; let the default handler run.
   return FALSE;
 }
 
 // -----------------------------------------------------------------------------
 // ViewIDUtil::Delegate implementation
 
 GtkWidget* TabContentsContainerGtk::GetWidgetForViewID(ViewID view_id) {
   if (view_id == VIEW_ID_TAB_CONTAINER)
     return widget();
 
@@ skipping 23 matching lines @@
     g_value_set_int(&value, allocation->width - requisition.width);
   gtk_container_child_set_property(GTK_CONTAINER(floating_container),
                                    status->widget(), "x", &value);
 
   int child_y = std::max(allocation->height - requisition.height, 0);
   g_value_set_int(&value, child_y + status->y_offset());
   gtk_container_child_set_property(GTK_CONTAINER(floating_container),
                                    status->widget(), "y", &value);
   g_value_unset(&value);
 }