Clear the clipboard closing Incognito window

ui/base/clipboard/clipboard_gtk.cc

 // Copyright (c) 2012 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 "ui/base/clipboard/clipboard.h"
 
 #include <gtk/gtk.h>
 #include <X11/extensions/Xfixes.h>
 #include <X11/Xatom.h>
 #include <map>
@@ skipping 88 matching lines @@
       clipboard_sequence_number_++;
     } else if (ev->selection == XA_PRIMARY) {
       primary_sequence_number_++;
     } else {
       DLOG(ERROR) << "Unexpected selection atom: " << ev->selection;
     }
   }
   return GDK_FILTER_CONTINUE;
 }
 
+const char kSourceTagType[] = "org.chromium.source-tag";
 const char kMimeTypeBitmap[] = "image/bmp";
 const char kMimeTypeMozillaURL[] = "text/x-moz-url";
 const char kMimeTypePepperCustomData[] = "chromium/x-pepper-custom-data";
 const char kMimeTypeWebkitSmartPaste[] = "chromium/x-webkit-paste";
 
 std::string GdkAtomToString(const GdkAtom& atom) {
   gchar* name = gdk_atom_name(atom);
   std::string rv(name);
   g_free(name);
   return rv;
@@ skipping 91 matching lines @@
   DCHECK(CalledOnValidThread());
   clipboard_ = gtk_clipboard_get(GDK_SELECTION_CLIPBOARD);
   primary_selection_ = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
 }
 
 Clipboard::~Clipboard() {
   DCHECK(CalledOnValidThread());
   gtk_clipboard_store(clipboard_);
 }
 
-void Clipboard::WriteObjects(Buffer buffer, const ObjectMap& objects) {
+void Clipboard::WriteObjectsImpl(Buffer buffer,
+                                 const ObjectMap& objects,
+                                 SourceTag tag) {
   DCHECK(CalledOnValidThread());
   clipboard_data_ = new TargetMap();
 
   for (ObjectMap::const_iterator iter = objects.begin();
        iter != objects.end(); ++iter) {
     DispatchObject(static_cast<ObjectType>(iter->first), iter->second);
   }
+  WriteSourceTag(tag);
 
   SetGtkClipboard(buffer);
 }
 
 // Take ownership of the GTK clipboard and inform it of the targets we support.
 void Clipboard::SetGtkClipboard(Buffer buffer) {
   scoped_ptr<GtkTargetEntry[]> targets(
       new GtkTargetEntry[clipboard_data_->size()]);
 
   int i = 0;
@@ skipping 105 matching lines @@
   // We assume that certain mapping types are only written by trusted code.
   // Therefore we must upkeep their integrity.
   if (format.Equals(GetBitmapFormatType()))
     return;
   char* data = new char[data_len];
   memcpy(data, data_data, data_len);
   // TODO(dcheng): Maybe this map should use GdkAtoms...
   InsertMapping(GdkAtomToString(format.ToGdkAtom()).c_str(), data, data_len);
 }
 
+void Clipboard::WriteSourceTag(SourceTag tag) {
+  if (tag != SourceTag()) {
+    ObjectMapParam binary = SourceTag2Binary(tag);
+    WriteData(GetSourceTagFormatType(), &binary[0], binary.size());
+  }
+}
+
 // We do not use gtk_clipboard_wait_is_target_available because of
 // a bug with the gtk clipboard. It caches the available targets
 // and does not always refresh the cache when it is appropriate.
 bool Clipboard::IsFormatAvailable(const Clipboard::FormatType& format,
                                   Clipboard::Buffer buffer) const {
   DCHECK(CalledOnValidThread());
   GtkClipboard* clipboard = LookupBackingClipboard(buffer);
   if (clipboard == NULL)
     return false;
 
@@ skipping 217 matching lines @@
   GtkSelectionData* data =
       gtk_clipboard_wait_for_contents(clipboard_, format.ToGdkAtom());
   if (!data)
     return;
   result->assign(reinterpret_cast<const char*>(
                      gtk_selection_data_get_data(data)),
                  gtk_selection_data_get_length(data));
   gtk_selection_data_free(data);
 }
 
+Clipboard::SourceTag Clipboard::ReadSourceTag() const {
+  std::string result;
+  ReadData(GetSourceTagFormatType(), &result);
+  return Binary2SourceTag(result);
+}
+
 uint64 Clipboard::GetSequenceNumber(Buffer buffer) {
   DCHECK(CalledOnValidThread());
   if (buffer == BUFFER_STANDARD)
     return SelectionChangeObserver::GetInstance()->clipboard_sequence_number();
   else
     return SelectionChangeObserver::GetInstance()->primary_sequence_number();
 }
 
 //static
 Clipboard::FormatType Clipboard::GetFormatType(
@@ skipping 52 matching lines @@
   CR_DEFINE_STATIC_LOCAL(FormatType, type, (kMimeTypeWebCustomData));
   return type;
 }
 
 // static
 const Clipboard::FormatType& Clipboard::GetPepperCustomDataFormatType() {
   CR_DEFINE_STATIC_LOCAL(FormatType, type, (kMimeTypePepperCustomData));
   return type;
 }
 
+// static
+const Clipboard::FormatType& Clipboard::GetSourceTagFormatType() {
+  CR_DEFINE_STATIC_LOCAL(FormatType, type, (kSourceTagType));
+  return type;
+}
+
 void Clipboard::InsertMapping(const char* key,
                               char* data,
                               size_t data_len) {
   DCHECK(clipboard_data_->find(key) == clipboard_data_->end());
   (*clipboard_data_)[key] = std::make_pair(data, data_len);
 }
 
 GtkClipboard* Clipboard::LookupBackingClipboard(Buffer clipboard) const {
   switch (clipboard) {
     case BUFFER_STANDARD:
       return clipboard_;
     case BUFFER_SELECTION:
       return primary_selection_;
     default:
       NOTREACHED();
       return NULL;
   }
 }
 
 }  // namespace ui