Copy selection to x clipboard.

chrome/browser/renderer_host/render_widget_host_view_gtk.h

 // Copyright (c) 2006-2009 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.
 
 #ifndef CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_GTK_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_GTK_H_
 
+#include <gdk/gdk.h>
 #include <vector>
 
 #include "base/gfx/native_widget_types.h"
 #include "chrome/browser/renderer_host/render_widget_host_view.h"
 #include "chrome/common/owned_widget_gtk.h"
+#include "chrome/common/render_messages.h"
 #include "webkit/glue/webcursor.h"
 
 class RenderWidgetHost;
 
 typedef struct _GtkClipboard GtkClipboard;
+typedef struct _GtkSelectionData GtkSelectionData;
 
 // -----------------------------------------------------------------------------
 // See comments in render_widget_host_view.h about this class and its members.
 // -----------------------------------------------------------------------------
 class RenderWidgetHostViewGtk : public RenderWidgetHostView {
  public:
   RenderWidgetHostViewGtk(RenderWidgetHost* widget);
   ~RenderWidgetHostViewGtk();
 
   // Initialize this object for use as a drawing area.
@@ skipping 23 matching lines @@
   gfx::Rect GetViewBounds() const;
   void UpdateCursor(const WebCursor& cursor);
   void SetIsLoading(bool is_loading);
   void IMEUpdateStatus(int control, const gfx::Rect& caret_rect);
   void DidPaintRect(const gfx::Rect& rect);
   void DidScrollRect(
       const gfx::Rect& rect, int dx, int dy);
   void RenderViewGone();
   void Destroy();
   void SetTooltipText(const std::wstring& tooltip_text);
+  void SelectionChanged();
+  void SetSelectionText(const std::string& text);
   void PasteFromSelectionClipboard();
   BackingStore* AllocBackingStore(const gfx::Size& size);
   // ---------------------------------------------------------------------------
 
   gfx::NativeView native_view() const { return view_.get(); }
 
   void Paint(const gfx::Rect&);
 
  private:
+  friend class RenderWidgetHostViewGtkWidget;
+
+  void set_event_selection(GdkEventSelection* event_selection) {
+    event_selection_ = *event_selection;
+    event_selection_active_ = true;
+  }
+
   // Update the display cursor for the render view.
   void ShowCurrentCursor();
 
+  void RequestSelectionText();
+
+  // When we've requested the text from the X clipboard, GTK returns it to us
+  // through this callback.
   static void ReceivedSelectionText(GtkClipboard* clipboard,
                                     const gchar* text,
                                     gpointer userdata);
 
   // The model object.
   RenderWidgetHost *const host_;
   // The native UI widget.
   OwnedWidgetGtk view_;
   // Variables used only for popups --------------------------------------------
   // Our parent widget.
   RenderWidgetHostView* parent_host_view_;
   // The native view of our parent, equivalent to
   // parent_host_view_->GetPluginNativeView().
   GtkWidget* parent_;
   // We connect to the parent's focus out event. When we are destroyed, we need
   // to remove this handler, so we must keep track of its id.
   gulong popup_signal_id_;
   // This variable determines our degree of control over user input. If we are
   // activatable, we must grab and handle all user input. If we are not
   // activatable, then our parent render view retains more control. Example of
   // activatable popup: <select> dropdown. Example of non-activatable popup:
   // form autocomplete.
   bool activatable_;
 
   // Whether we are currently loading.
   bool is_loading_;
 
   // The cursor for the page. This is passed up from the renderer.
   WebCursor current_cursor_;
+
+  // We cache the text that is selected on the page. This is used for copying to
+  // the X clipboard. We update |selection_text_| whenever X asks us for it and
+  // the cache is empty. We invalidate it (set it to empty) whenever the
+  // renderer sends a SelectionChanged message.
+  std::string selection_text_;
+
+  // A struct that keeps state for the XSelectionEvent we are handling (if any).
+  GdkEventSelection event_selection_;
+  // Tracks whether we are currently handling an XSelectionEvent.
+  bool event_selection_active_;
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_GTK_H_