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

   1 // Copyright (c) 2013 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/gtk_util.h"
   6 #include "chrome/browser/ui/gtk/tab_contents/chrome_web_contents_view_delegate_gtk.h"
   7 #include "components/web_modal/native_web_contents_modal_dialog_manager.h"
   8 #include "components/web_modal/web_contents_modal_dialog_manager.h"
   9 #include "content/public/browser/browser_thread.h"
  10 #include "ui/base/gtk/focus_store_gtk.h"
  11
  12 using web_modal::NativeWebContentsModalDialog;
  13 using web_modal::NativeWebContentsModalDialogManagerDelegate;
  14
  15 namespace {
  16
  17 // Web contents modal dialog manager implementation for the GTK port. Unlike the
  18 // Win32 system, ConstrainedWindowGtk doesn't draw draggable fake windows and
  19 // instead just centers the dialog. It is thus an order of magnitude simpler.
  20 class NativeWebContentsModalDialogManagerGtk
  21     : public web_modal::NativeWebContentsModalDialogManager {
  22  public:
  23   NativeWebContentsModalDialogManagerGtk(
  24       NativeWebContentsModalDialogManagerDelegate* native_delegate)
  25           : native_delegate_(native_delegate),
  26             shown_widget_(NULL) {
  27   }
  28
  29   virtual ~NativeWebContentsModalDialogManagerGtk() {
  30   }
  31
  32   // NativeWebContentsModalDialogManager overrides
  33   virtual void ManageDialog(NativeWebContentsModalDialog dialog) OVERRIDE {
  34     DCHECK(g_object_is_floating(GetGtkWidget(dialog)));
  35     g_object_ref_sink(GetGtkWidget(dialog));
  36
  37     g_signal_connect(GetGtkWidget(dialog), "hierarchy-changed",
  38                      G_CALLBACK(OnHierarchyChangedThunk), this);
  39     g_signal_connect(GetGtkWidget(dialog),
  40                      "destroy",
  41                      G_CALLBACK(OnDestroyThunk),
  42                      this);
  43   }
  44
  45   virtual void ShowDialog(NativeWebContentsModalDialog dialog) OVERRIDE {
  46     GtkWidget* widget = GetGtkWidget(dialog);
  47
  48     // Any previously-shown widget should be destroyed before showing a new
  49     // widget.
  50     DCHECK(shown_widget_ == widget || shown_widget_ == NULL);
  51     gtk_widget_show_all(widget);
  52
  53     if (!shown_widget_) {
  54       // We collaborate with WebContentsView and stick ourselves in the
  55       // WebContentsView's floating container.
  56       ContainingView()->AttachWebContentsModalDialog(widget);
  57     }
  58
  59     shown_widget_ = widget;
  60   }
  61
  62   virtual void HideDialog(NativeWebContentsModalDialog dialog) OVERRIDE {
  63     gtk_widget_hide(GetGtkWidget(dialog));
  64   }
  65
  66   virtual void CloseDialog(NativeWebContentsModalDialog dialog) OVERRIDE {
  67     gtk_widget_destroy(GetGtkWidget(dialog));
  68   }
  69
  70   virtual void FocusDialog(NativeWebContentsModalDialog dialog) OVERRIDE {
  71     GtkWidget* focus_widget =
  72         reinterpret_cast<GtkWidget*>(
  73             g_object_get_data(G_OBJECT(GetGtkWidget(dialog)), "focus_widget"));
  74
  75     if (!focus_widget)
  76       return;
  77
  78     // The user may have focused another tab. In this case do not grab focus
  79     // until this tab is refocused.
  80     if (gtk_util::IsWidgetAncestryVisible(focus_widget))
  81       gtk_widget_grab_focus(focus_widget);
  82     else
  83       ContainingView()->focus_store()->SetWidget(focus_widget);
  84   }
  85
  86   virtual void PulseDialog(NativeWebContentsModalDialog dialog) OVERRIDE {
  87   }
  88
  89   virtual void HostChanged(
  90       web_modal::WebContentsModalDialogHost* new_host) OVERRIDE {
  91   }
  92
  93  private:
  94   typedef ChromeWebContentsViewDelegateGtk TabContentsViewType;
  95
  96   GtkWidget* GetGtkWidget(NativeWebContentsModalDialog dialog) {
  97     return GTK_WIDGET(dialog);
  98   }
  99
 100   // Returns the View that we collaborate with to position ourselves.
 101   TabContentsViewType* ContainingView() const {
 102     // WebContents may be destroyed already on tab shutdown.
 103      content::WebContents* web_contents = native_delegate_->GetWebContents();
 104     return web_contents ?
 105         ChromeWebContentsViewDelegateGtk::GetFor(web_contents) : NULL;
 106   }
 107
 108   CHROMEGTK_CALLBACK_1(NativeWebContentsModalDialogManagerGtk,
 109                        void,
 110                        OnHierarchyChanged,
 111                        GtkWidget*);
 112   CHROMEGTK_CALLBACK_0(NativeWebContentsModalDialogManagerGtk, void, OnDestroy);
 113
 114   NativeWebContentsModalDialogManagerDelegate* native_delegate_;
 115
 116   // The widget currently being shown.
 117   GtkWidget* shown_widget_;
 118
 119   DISALLOW_COPY_AND_ASSIGN(NativeWebContentsModalDialogManagerGtk);
 120 };
 121
 122 void NativeWebContentsModalDialogManagerGtk::OnHierarchyChanged(
 123     GtkWidget* sender,
 124     GtkWidget* previous_toplevel) {
 125   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 126
 127   if (!gtk_widget_is_toplevel(gtk_widget_get_toplevel(sender)))
 128     return;
 129
 130   FocusDialog(sender);
 131 }
 132
 133 void NativeWebContentsModalDialogManagerGtk::OnDestroy(
 134     GtkWidget* sender) {
 135   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 136
 137   if (shown_widget_ == sender) {
 138     // The containing view may already be destroyed on tab shutdown.
 139     if (ContainingView())
 140       ContainingView()->RemoveWebContentsModalDialog(sender);
 141
 142     shown_widget_ = NULL;
 143   }
 144
 145   native_delegate_->WillClose(sender);
 146
 147   g_object_unref(sender);
 148 }
 149
 150 }  // namespace
 151
 152 namespace web_modal {
 153
 154 NativeWebContentsModalDialogManager*
 155     WebContentsModalDialogManager::CreateNativeManager(
 156         NativeWebContentsModalDialogManagerDelegate* native_delegate) {
 157   return new NativeWebContentsModalDialogManagerGtk(native_delegate);
 158 }
 159
 160 }  // namespace web_modal