GTK: implement extension bookmark manager drag api....

chrome/browser/gtk/custom_drag.cc

 // 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.
 
-#include "chrome/browser/gtk/download_item_drag.h"
+#include "chrome/browser/gtk/custom_drag.h"
 
-#include "app/gfx/gtk_util.h"
 #include "app/gtk_dnd_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/download/download_manager.h"
+#include "chrome/browser/gtk/bookmark_utils_gtk.h"
+#include "gfx/gtk_util.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/net_util.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 namespace {
 
-const int kCodeMask = gtk_dnd_util::TEXT_URI_LIST |
-                      gtk_dnd_util::CHROME_NAMED_URL;
-const GdkDragAction kDragAction = GDK_ACTION_COPY;
+const int kDownloadItemCodeMask = gtk_dnd_util::TEXT_URI_LIST |
+                                  gtk_dnd_util::CHROME_NAMED_URL;
+const GdkDragAction kDownloadItemDragAction = GDK_ACTION_COPY;
+const GdkDragAction kBookmarkDragAction = GDK_ACTION_COPY;
 
-void OnDragDataGet(GtkWidget* widget, GdkDragContext* context,
-                   GtkSelectionData* selection_data,
-                   guint target_type, guint time,
-                   DownloadItem* download_item) {
+void OnDragDataGetForDownloadItem(GtkSelectionData* selection_data,
+                                  guint target_type,
+                                  const DownloadItem* download_item) {
   GURL url = net::FilePathToFileURL(download_item->full_path());
   gtk_dnd_util::WriteURLWithName(selection_data, url,
       UTF8ToUTF16(download_item->GetFileName().value()), target_type);
 }
 
+void OnDragDataGetStandalone(GtkWidget* widget, GdkDragContext* context,
+                             GtkSelectionData* selection_data,
+                             guint target_type, guint time,
+                             const DownloadItem* item) {
+  OnDragDataGetForDownloadItem(selection_data, target_type, item);
+}
+
 }  // namespace
 
+// CustomDrag ------------------------------------------------------------------
+
+CustomDrag::CustomDrag(SkBitmap* icon, int code_mask, GdkDragAction action)
+    : drag_widget_(gtk_invisible_new()),
+      pixbuf_(icon ? gfx::GdkPixbufFromSkBitmap(icon) : NULL) {
+  g_object_ref_sink(drag_widget_);
+  g_signal_connect(drag_widget_, "drag-data-get",
+                   G_CALLBACK(OnDragDataGetThunk), this);
+  g_signal_connect(drag_widget_, "drag-begin",
+                   G_CALLBACK(OnDragBeginThunk), this);
+  g_signal_connect(drag_widget_, "drag-end",
+                   G_CALLBACK(OnDragEndThunk), this);
+
+  GtkTargetList* list = gtk_dnd_util::GetTargetListFromCodeMask(code_mask);
+  GdkEvent* event = gtk_get_current_event();
+  gtk_drag_begin(drag_widget_, list, action, 1, event);
+  if (event)
+    gdk_event_free(event);
+  gtk_target_list_unref(list);
+}
+
+CustomDrag::~CustomDrag() {
+  if (pixbuf_)
+    g_object_unref(pixbuf_);
+  g_object_unref(drag_widget_);
+}
+
+void CustomDrag::OnDragBegin(GtkWidget* widget, GdkDragContext* drag_context) {
+  if (pixbuf_)
+    gtk_drag_set_icon_pixbuf(drag_context, pixbuf_, 0, 0);
+}
+
+void CustomDrag::OnDragEnd(GtkWidget* widget, GdkDragContext* drag_context) {
+  delete this;
+}
+
+// DownloadItemDrag ------------------------------------------------------------
+
+DownloadItemDrag::DownloadItemDrag(const DownloadItem* item,
+                                   SkBitmap* icon)
+    : CustomDrag(icon, kDownloadItemCodeMask, kDownloadItemDragAction),
+      download_item_(item) {
+}
+
+DownloadItemDrag::~DownloadItemDrag() {
+}
+
+void DownloadItemDrag::OnDragDataGet(
+    GtkWidget* widget, GdkDragContext* context,
+    GtkSelectionData* selection_data,
+    guint target_type, guint time) {
+  OnDragDataGetForDownloadItem(selection_data, target_type, download_item_);
+}
+
 // static
 void DownloadItemDrag::SetSource(GtkWidget* widget, DownloadItem* item) {
   gtk_drag_source_set(widget, GDK_BUTTON1_MASK, NULL, 0,
-                      kDragAction);
-  gtk_dnd_util::SetSourceTargetListFromCodeMask(widget, kCodeMask);
+                      kDownloadItemDragAction);
+  gtk_dnd_util::SetSourceTargetListFromCodeMask(widget, kDownloadItemCodeMask);
   g_signal_connect(widget, "drag-data-get",
-                   G_CALLBACK(OnDragDataGet), item);
+                   G_CALLBACK(OnDragDataGetStandalone), item);
 }
 
 // static
 void DownloadItemDrag::BeginDrag(const DownloadItem* item, SkBitmap* icon) {
   new DownloadItemDrag(item, icon);
 }
 
-DownloadItemDrag::DownloadItemDrag(const DownloadItem* item,
-                                   SkBitmap* icon)
-    : drag_widget_(gtk_invisible_new()),
-      pixbuf_(gfx::GdkPixbufFromSkBitmap(icon)) {
-  g_object_ref_sink(drag_widget_);
-  g_signal_connect(drag_widget_, "drag-data-get",
-                   G_CALLBACK(OnDragDataGet), const_cast<DownloadItem*>(item));
-  g_signal_connect(drag_widget_, "drag-begin",
-                   G_CALLBACK(OnDragBegin), this);
-  g_signal_connect(drag_widget_, "drag-end",
-                   G_CALLBACK(OnDragEnd), this);
+// BookmarkDrag ----------------------------------------------------------------
 
-  GtkTargetList* list = gtk_dnd_util::GetTargetListFromCodeMask(kCodeMask);
-  GdkEvent* event = gtk_get_current_event();
-  gtk_drag_begin(drag_widget_, list, kDragAction, 1, event);
-  if (event)
-    gdk_event_free(event);
-  gtk_target_list_unref(list);
+BookmarkDrag::BookmarkDrag(Profile* profile,
+                           const std::vector<const BookmarkNode*>& nodes)
+    : CustomDrag(NULL,
+                 bookmark_utils::GetCodeMask(false),
+                 kBookmarkDragAction),
+      profile_(profile),
+      nodes_(nodes) {
 }
 
-DownloadItemDrag::~DownloadItemDrag() {
-  g_object_unref(pixbuf_);
-  g_object_unref(drag_widget_);
+BookmarkDrag::~BookmarkDrag() {
+}
+
+void BookmarkDrag::OnDragDataGet(GtkWidget* widget, GdkDragContext* context,
+                                 GtkSelectionData* selection_data,
+                                 guint target_type, guint time) {
+  bookmark_utils::WriteBookmarksToSelection(nodes_, selection_data,
+                                            target_type, profile_);
 }
 
 // static
-void DownloadItemDrag::OnDragBegin(GtkWidget* widget,
-                                   GdkDragContext* drag_context,
-                                   DownloadItemDrag* drag) {
-  gtk_drag_set_icon_pixbuf(drag_context, drag->pixbuf_, 0, 0);
+void BookmarkDrag::BeginDrag(Profile* profile,
+                             const std::vector<const BookmarkNode*>& nodes) {
+  new BookmarkDrag(profile, nodes);
 }
 
-// static
-void DownloadItemDrag::OnDragEnd(GtkWidget* widget,
-                                 GdkDragContext* drag_context,
-                                 DownloadItemDrag* drag) {
-  delete drag;
-}