1 files changed, 95 insertions, 0 deletions
diff --git a/chrome/browser/gtk/custom_drag.h b/chrome/browser/gtk/custom_drag.h
new file mode 100644
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+++ b/chrome/browser/gtk/custom_drag.h
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+// Copyright (c) 2010 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_GTK_CUSTOM_DRAG_H_
+#define CHROME_BROWSER_GTK_CUSTOM_DRAG_H_
+
+#include <gtk/gtk.h>
+#include <vector>
+
+#include "app/gtk_signal.h"
+#include "base/basictypes.h"
+
+class BookmarkNode;
+class DownloadItem;
+class Profile;
+class SkBitmap;
+
+// Base class for programatically generated drags.
+class CustomDrag {
+ protected:
+  explicit CustomDrag(SkBitmap* icon, int code_mask, GdkDragAction action);
+  virtual ~CustomDrag();
+
+  virtual void OnDragDataGet(GtkWidget* widget, GdkDragContext* context,
+                             GtkSelectionData* selection_data,
+                             guint target_type, guint time) = 0;
+
+ private:
+  CHROMEGTK_CALLBACK_1(CustomDrag, void, OnDragBegin, GdkDragContext*);
+  CHROMEGTK_CALLBACK_1(CustomDrag, void, OnDragEnd, GdkDragContext*);
+
+  // Since this uses a virtual function, we can't use a macro.
+  static void OnDragDataGetThunk(GtkWidget* widget, GdkDragContext* context,
+                                 GtkSelectionData* selection_data,
+                                 guint target_type, guint time,
+                                 CustomDrag* custom_drag) {
+    return custom_drag->OnDragDataGet(widget, context, selection_data,
+                                      target_type, time);
+  }
+
+  GtkWidget* drag_widget_;
+  GdkPixbuf* pixbuf_;
+
+  DISALLOW_COPY_AND_ASSIGN(CustomDrag);
+};
+
+// Encapsulates functionality for drags of download items.
+class DownloadItemDrag : public CustomDrag {
+ public:
+  // Sets |widget| as a source for drags pertaining to |item|. No
+  // DownloadItemDrag object is created.
+  static void SetSource(GtkWidget* widget, DownloadItem* item);
+
+  // Creates a new DownloadItemDrag, the lifetime of which is tied to the
+  // system drag.
+  static void BeginDrag(const DownloadItem* item, SkBitmap* icon);
+
+ private:
+  DownloadItemDrag(const DownloadItem* item, SkBitmap* icon);
+  virtual ~DownloadItemDrag();
+
+  virtual void OnDragDataGet(GtkWidget* widget, GdkDragContext* context,
+                             GtkSelectionData* selection_data,
+                             guint target_type, guint time);
+
+  const DownloadItem* download_item_;
+
+  DISALLOW_COPY_AND_ASSIGN(DownloadItemDrag);
+};
+
+// Encapsulates functionality for drags of one or more bookmarks.
+class BookmarkDrag : public CustomDrag {
+ public:
+  // Creates a new BookmarkDrag, the lifetime of which is tied to the
+  // system drag.
+  static void BeginDrag(Profile* profile,
+                        const std::vector<const BookmarkNode*>& nodes);
+
+ private:
+  BookmarkDrag(Profile* profile,
+               const std::vector<const BookmarkNode*>& nodes);
+  virtual ~BookmarkDrag();
+
+  virtual void OnDragDataGet(GtkWidget* widget, GdkDragContext* context,
+                             GtkSelectionData* selection_data,
+                             guint target_type, guint time);
+
+  Profile* profile_;
+  std::vector<const BookmarkNode*> nodes_;
+
+  DISALLOW_COPY_AND_ASSIGN(BookmarkDrag);
+};
+
+#endif  // CHROME_BROWSER_GTK_CUSTOM_DRAG_H_