More web contents dragging.

chrome/browser/gtk/gtk_dnd_util.h

 // Copyright (c) 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_GTK_DND_REGISTRY_H_
-#define CHROME_BROWSER_GTK_DND_REGISTRY_H_
+#ifndef CHROME_BROWSER_GTK_GTK_DND_UTIL_H_
+#define CHROME_BROWSER_GTK_GTK_DND_UTIL_H_
 
 #include <gtk/gtk.h>
 
-// We wrap all of these constants in a namespace to prevent pollution.
-namespace dnd {
+class GtkDndUtil {
+ public:
+  // Registry of all internal int codes for drag and drop.
+  enum {
+    X_CHROME_TAB = 1 << 0,
+    X_CHROME_TEXT_PLAIN = 1 << 1,
+    X_CHROME_TEXT_URI_LIST = 1 << 2,
+    X_CHROME_TEXT_HTML = 1 << 3,
+    X_CHROME_BOOKMARK_ITEM = 1 << 4,
+    X_CHROME_WEBDROP_FILE_CONTENTS = 1 << 5,
+  };
 
-// Registry of all internal int codes for drag and drop.
-//
-// These ids need to be unique app wide. Simply adding a GtkTargetEntry with an
-// id of 0 should be an error and it will conflict with X_CHROME_TAB below.
-enum {
-  X_CHROME_TAB = 1 << 0,
-  X_CHROME_TEXT_PLAIN = 1 << 1,
-  X_CHROME_TEXT_URI_LIST = 1 << 2,
-  X_CHROME_BOOKMARK_ITEM = 1 << 3,
+  // Get the atom for a given target (of the above enum type). Will return NULL
+  // for non-custom targets, such as X_CHROME_TEXT_PLAIN.
+  static GdkAtom GetAtomForTarget(int target);
+
+  // Creates a target list from the given mask. The mask should be an OR of
+  // X_CHROME_* values. The target list is returned with ref count 1; the caller
+  // is responsible for unreffing it when it is no longer needed.
+  // Since the MIME type for WEBDROP_FILE_CONTENTS depends on the file's
+  // contents, that flag is ignored by this function. It is the responsibility
+  // of the client code to do the right thing.
+  static GtkTargetList* GetTargetListFromCodeMask(int code_mask);
+
+  // Set the drag target list for |dest| or |source| with the target list that
+  // corresponds to |code_mask|.
+  static void SetDestTargetListFromCodeMask(GtkWidget* dest, int code_mask);
+  static void SetSourceTargetListFromCodeMask(GtkWidget* source, int code_mask);
+
+ private:
+  GtkDndUtil();
 };
 
-// Creates a target list from the given mask. The mask should be an OR of
-// X_CHROME_* values. The target list is returned with ref count 1; the caller
-// is responsible for unreffing it when it is no longer needed.
-GtkTargetList* GetTargetListFromCodeMask(int code_mask);
-
-// Set the drag target list for |dest| or |source| with the target list that
-// corresponds to |code_mask|.
-void SetDestTargetListFromCodeMask(GtkWidget* dest, int code_mask);
-void SetSourceTargetListFromCodeMask(GtkWidget* source, int code_mask);
-
-}  // namespace dnd
-
-#endif  // CHROME_BROWSER_GTK_DND_REGISTRY_H_
+#endif  // CHROME_BROWSER_GTK_GTK_DND_UTIL_H_