src/chrome/browser/ui/gtk/tab_contents_container_gtk.cc

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/ui/gtk/tab_contents_container_gtk.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/i18n/rtl.h"
  10 #include "chrome/browser/ui/gtk/status_bubble_gtk.h"
  11 #include "content/public/browser/render_widget_host_view.h"
  12 #include "content/public/browser/web_contents.h"
  13 #include "content/public/browser/web_contents_view.h"
  14 #include "ui/base/gtk/gtk_expanded_container.h"
  15 #include "ui/base/gtk/gtk_floating_container.h"
  16 #include "ui/gfx/native_widget_types.h"
  17
  18 namespace {
  19 void HideWidget(GtkWidget* widget, gpointer ignored) {
  20   gtk_widget_hide(widget);
  21 }
  22 }  // namespace
  23
  24 TabContentsContainerGtk::TabContentsContainerGtk(StatusBubbleGtk* status_bubble,
  25                                                  bool embed_fullscreen_widget)
  26     : status_bubble_(status_bubble),
  27       should_embed_fullscreen_widgets_(embed_fullscreen_widget),
  28       is_embedding_fullscreen_widget_(false) {
  29   // A high level overview of the TabContentsContainer:
  30   //
  31   // +- GtkFloatingContainer |floating_| -------------------------------+
  32   // |+- GtkExpandedContainer |expanded_| -----------------------------+|
  33   // ||                                                                ||
  34   // ||                                                                ||
  35   // ||                                                                ||
  36   // ||                                                                ||
  37   // |+- (StatusBubble) ------+                                        ||
  38   // |+                       +                                        ||
  39   // |+-----------------------+----------------------------------------+|
  40   // +------------------------------------------------------------------+
  41
  42   floating_.Own(gtk_floating_container_new());
  43   gtk_widget_set_name(floating_.get(), "chrome-tab-contents-container");
  44
  45   expanded_ = gtk_expanded_container_new();
  46   gtk_container_add(GTK_CONTAINER(floating_.get()), expanded_);
  47
  48   if (status_bubble_) {
  49     gtk_floating_container_add_floating(GTK_FLOATING_CONTAINER(floating_.get()),
  50                                         status_bubble_->widget());
  51     g_signal_connect(floating_.get(), "set-floating-position",
  52                      G_CALLBACK(OnSetFloatingPosition), this);
  53   }
  54
  55   gtk_widget_show(expanded_);
  56   gtk_widget_show(floating_.get());
  57
  58   ViewIDUtil::SetDelegateForWidget(widget(), this);
  59 }
  60
  61 TabContentsContainerGtk::~TabContentsContainerGtk() {
  62   floating_.Destroy();
  63 }
  64
  65 void TabContentsContainerGtk::SetTab(content::WebContents* tab) {
  66   if (tab == web_contents())
  67     return;
  68
  69   HideTab();
  70   WebContentsObserver::Observe(tab);
  71   is_embedding_fullscreen_widget_ =
  72       should_embed_fullscreen_widgets_ &&
  73       tab && tab->GetFullscreenRenderWidgetHostView();
  74   PackTab();
  75 }
  76
  77 void TabContentsContainerGtk::PackTab() {
  78   content::WebContents* const tab = web_contents();
  79   if (!tab)
  80     return;
  81
  82   const gfx::NativeView widget = is_embedding_fullscreen_widget_ ?
  83       tab->GetFullscreenRenderWidgetHostView()->GetNativeView() :
  84       tab->GetView()->GetNativeView();
  85   if (widget) {
  86     if (gtk_widget_get_parent(widget) != expanded_)
  87       gtk_container_add(GTK_CONTAINER(expanded_), widget);
  88     gtk_widget_show(widget);
  89   }
  90
  91   if (is_embedding_fullscreen_widget_)
  92     return;
  93
  94   tab->WasShown();
  95
  96   // Make sure that the tab is below the find bar. Sometimes the content
  97   // native view will be null.
  98   GtkWidget* const content_widget = tab->GetView()->GetContentNativeView();
  99   if (content_widget) {
 100     GdkWindow* const content_gdk_window = gtk_widget_get_window(content_widget);
 101     if (content_gdk_window)
 102       gdk_window_lower(content_gdk_window);
 103   }
 104 }
 105
 106 void TabContentsContainerGtk::HideTab() {
 107   content::WebContents* const tab = web_contents();
 108   if (!tab)
 109     return;
 110
 111   gtk_container_foreach(GTK_CONTAINER(expanded_), &HideWidget, NULL);
 112   if (is_embedding_fullscreen_widget_)
 113     return;
 114   tab->WasHidden();
 115 }
 116
 117 void TabContentsContainerGtk::DetachTab(content::WebContents* tab) {
 118   if (!tab)
 119     return;
 120   if (tab == web_contents()) {
 121     HideTab();
 122     WebContentsObserver::Observe(NULL);
 123   }
 124
 125   const gfx::NativeView widget = tab->GetView()->GetNativeView();
 126   const gfx::NativeView fs_widget =
 127       (should_embed_fullscreen_widgets_ &&
 128        tab->GetFullscreenRenderWidgetHostView()) ?
 129           tab->GetFullscreenRenderWidgetHostView()->GetNativeView() : NULL;
 130
 131   // It is possible to detach an unrealized, unparented WebContents if you
 132   // slow things down enough in valgrind. Might happen in the real world, too.
 133   if (widget) {
 134     GtkWidget* const parent = gtk_widget_get_parent(widget);
 135     if (parent) {
 136       DCHECK_EQ(parent, expanded_);
 137       gtk_container_remove(GTK_CONTAINER(expanded_), widget);
 138     }
 139   }
 140   if (fs_widget) {
 141     GtkWidget* const parent = gtk_widget_get_parent(fs_widget);
 142     if (parent) {
 143       DCHECK_EQ(parent, expanded_);
 144       gtk_container_remove(GTK_CONTAINER(expanded_), fs_widget);
 145     }
 146   }
 147 }
 148
 149 void TabContentsContainerGtk::WebContentsDestroyed(
 150     content::WebContents* contents) {
 151   // Sometimes, a WebContents is destroyed before we know about it. This allows
 152   // us to clean up our state in case this happens.
 153   DetachTab(contents);
 154 }
 155
 156 // -----------------------------------------------------------------------------
 157 // ViewIDUtil::Delegate implementation
 158
 159 GtkWidget* TabContentsContainerGtk::GetWidgetForViewID(ViewID view_id) {
 160   if (view_id == VIEW_ID_TAB_CONTAINER)
 161     return widget();
 162
 163   return NULL;
 164 }
 165
 166 // -----------------------------------------------------------------------------
 167
 168 void TabContentsContainerGtk::DidShowFullscreenWidget(int routing_id) {
 169   if (!should_embed_fullscreen_widgets_)
 170     return;
 171   HideTab();
 172   is_embedding_fullscreen_widget_ =
 173       web_contents() && web_contents()->GetFullscreenRenderWidgetHostView();
 174   PackTab();
 175 }
 176
 177 void TabContentsContainerGtk::DidDestroyFullscreenWidget(int routing_id) {
 178   if (!should_embed_fullscreen_widgets_)
 179     return;
 180   HideTab();
 181   is_embedding_fullscreen_widget_ = false;
 182   PackTab();
 183 }
 184
 185 // static
 186 void TabContentsContainerGtk::OnSetFloatingPosition(
 187     GtkFloatingContainer* floating_container, GtkAllocation* allocation,
 188     TabContentsContainerGtk* tab_contents_container) {
 189   StatusBubbleGtk* status = tab_contents_container->status_bubble_;
 190
 191   // Look at the size request of the status bubble and tell the
 192   // GtkFloatingContainer where we want it positioned.
 193   GtkRequisition requisition;
 194   gtk_widget_size_request(status->widget(), &requisition);
 195
 196   bool ltr = !base::i18n::IsRTL();
 197
 198   GValue value = { 0, };
 199   g_value_init(&value, G_TYPE_INT);
 200   if (ltr ^ status->flip_horizontally())  // Is it on the left?
 201     g_value_set_int(&value, 0);
 202   else
 203     g_value_set_int(&value, allocation->width - requisition.width);
 204   gtk_container_child_set_property(GTK_CONTAINER(floating_container),
 205                                    status->widget(), "x", &value);
 206
 207   int child_y = std::max(allocation->height - requisition.height, 0);
 208   g_value_set_int(&value, child_y + status->y_offset());
 209   gtk_container_child_set_property(GTK_CONTAINER(floating_container),
 210                                    status->widget(), "y", &value);
 211   g_value_unset(&value);
 212 }