content/browser/web_contents/web_contents_view_gtk.h

   1 // Copyright (c) 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 #ifndef CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_GTK_H_
   6 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_GTK_H_
   7
   8 #include <gtk/gtk.h>
   9
  10 #include <vector>
  11
  12 #include "base/memory/scoped_ptr.h"
  13 #include "content/common/content_export.h"
  14 #include "content/common/drag_event_source_info.h"
  15 #include "content/port/browser/render_view_host_delegate_view.h"
  16 #include "content/port/browser/web_contents_view_port.h"
  17 #include "ui/base/gtk/focus_store_gtk.h"
  18 #include "ui/base/gtk/gtk_signal.h"
  19 #include "ui/base/gtk/owned_widget_gtk.h"
  20
  21 namespace content {
  22
  23 class WebContents;
  24 class WebContentsImpl;
  25 class WebContentsViewDelegate;
  26 class WebDragDestDelegate;
  27 class WebDragDestGtk;
  28 class WebDragSourceGtk;
  29
  30 class CONTENT_EXPORT WebContentsViewGtk
  31     : public WebContentsViewPort,
  32       public RenderViewHostDelegateView {
  33  public:
  34   // The corresponding WebContentsImpl is passed in the constructor, and manages
  35   // our lifetime. This doesn't need to be the case, but is this way currently
  36   // because that's what was easiest when they were split. We optionally take
  37   // |wrapper| which creates an intermediary widget layer for features from the
  38   // Embedding layer that lives with the WebContentsView.
  39   WebContentsViewGtk(WebContentsImpl* web_contents,
  40                      WebContentsViewDelegate* delegate);
  41   virtual ~WebContentsViewGtk();
  42
  43   WebContentsViewDelegate* delegate() const { return delegate_.get(); }
  44   WebContents* web_contents();
  45
  46   // WebContentsView implementation --------------------------------------------
  47
  48   virtual gfx::NativeView GetNativeView() const OVERRIDE;
  49   virtual gfx::NativeView GetContentNativeView() const OVERRIDE;
  50   virtual gfx::NativeWindow GetTopLevelNativeWindow() const OVERRIDE;
  51   virtual void GetContainerBounds(gfx::Rect* out) const OVERRIDE;
  52   virtual void OnTabCrashed(base::TerminationStatus status,
  53                             int error_code) OVERRIDE;
  54   virtual void SizeContents(const gfx::Size& size) OVERRIDE;
  55   virtual void Focus() OVERRIDE;
  56   virtual void SetInitialFocus() OVERRIDE;
  57   virtual void StoreFocus() OVERRIDE;
  58   virtual void RestoreFocus() OVERRIDE;
  59   virtual DropData* GetDropData() const OVERRIDE;
  60   virtual gfx::Rect GetViewBounds() const OVERRIDE;
  61
  62   // WebContentsViewPort implementation ----------------------------------------
  63   virtual void CreateView(
  64       const gfx::Size& initial_size, gfx::NativeView context) OVERRIDE;
  65   virtual RenderWidgetHostView* CreateViewForWidget(
  66       RenderWidgetHost* render_widget_host) OVERRIDE;
  67   virtual RenderWidgetHostView* CreateViewForPopupWidget(
  68       RenderWidgetHost* render_widget_host) OVERRIDE;
  69   virtual void SetPageTitle(const string16& title) OVERRIDE;
  70   virtual void RenderViewCreated(RenderViewHost* host) OVERRIDE;
  71   virtual void RenderViewSwappedIn(RenderViewHost* host) OVERRIDE;
  72   virtual void SetOverscrollControllerEnabled(bool enabled) OVERRIDE;
  73
  74   // Backend implementation of RenderViewHostDelegateView.
  75   virtual void ShowContextMenu(const ContextMenuParams& params) OVERRIDE;
  76   virtual void ShowPopupMenu(const gfx::Rect& bounds,
  77                              int item_height,
  78                              double item_font_size,
  79                              int selected_item,
  80                              const std::vector<MenuItem>& items,
  81                              bool right_aligned,
  82                              bool allow_multiple_selection) OVERRIDE;
  83   virtual void StartDragging(const DropData& drop_data,
  84                              WebKit::WebDragOperationsMask allowed_ops,
  85                              const gfx::ImageSkia& image,
  86                              const gfx::Vector2d& image_offset,
  87                              const DragEventSourceInfo& event_info) OVERRIDE;
  88   virtual void UpdateDragCursor(WebKit::WebDragOperation operation) OVERRIDE;
  89   virtual void GotFocus() OVERRIDE;
  90   virtual void TakeFocus(bool reverse) OVERRIDE;
  91
  92  private:
  93   // Insert the given widget into the content area. Should only be used for
  94   // web pages and the like (including interstitials and sad tab). Note that
  95   // this will be perfectly happy to insert overlapping render views, so care
  96   // should be taken that the correct one is hidden/shown.
  97   void InsertIntoContentArea(GtkWidget* widget);
  98
  99   // Replaces, or updates, the existing WebDragDestGtk with one for |new_host|.
 100   // This must be called when swapping in, or creating a swapped in, RVH.
 101   void UpdateDragDest(RenderViewHost* new_host);
 102
 103   // Handle focus traversal on the render widget native view. Can be overridden
 104   // by subclasses.
 105   CHROMEGTK_CALLBACK_1(WebContentsViewGtk, gboolean, OnFocus, GtkDirectionType);
 106
 107   // Used to adjust the size of its children when the size of |expanded_| is
 108   // changed.
 109   CHROMEGTK_CALLBACK_2(WebContentsViewGtk, void, OnChildSizeRequest,
 110                        GtkWidget*, GtkRequisition*);
 111
 112   // Used to propagate the size change of |expanded_| to our RWHV to resize the
 113   // renderer content.
 114   CHROMEGTK_CALLBACK_1(WebContentsViewGtk, void, OnSizeAllocate,
 115                        GtkAllocation*);
 116
 117   // The WebContentsImpl whose contents we display.
 118   WebContentsImpl* web_contents_;
 119
 120   // This container holds the tab's web page views. It is a GtkExpandedContainer
 121   // so that we can control the size of the web pages.
 122   ui::OwnedWidgetGtk expanded_;
 123
 124   ui::FocusStoreGtk focus_store_;
 125
 126   // The helper object that handles drag destination related interactions with
 127   // GTK.
 128   scoped_ptr<WebDragDestGtk> drag_dest_;
 129
 130   // Object responsible for handling drags from the page for us.
 131   scoped_ptr<WebDragSourceGtk> drag_source_;
 132
 133   // Our optional views wrapper. If non-NULL, we return this widget as our
 134   // GetNativeView() and insert |expanded_| as its child in the GtkWidget
 135   // hierarchy.
 136   scoped_ptr<WebContentsViewDelegate> delegate_;
 137
 138   // The size we want the view to be.  We keep this in a separate variable
 139   // because resizing in GTK+ is async.
 140   gfx::Size requested_size_;
 141
 142   DISALLOW_COPY_AND_ASSIGN(WebContentsViewGtk);
 143 };
 144
 145 }  // namespace content
 146
 147 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_GTK_H_