Clear the clipboard closing Incognito window

chrome/browser/clipboard/incognito_marker.cc

+// Copyright (c) 2013 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/clipboard/incognito_marker.h"
+#include <cstddef>
+#include <cstring>
+#include <vector>
+#include "chrome/browser/profiles/profile.h"
+
+namespace chrome {
+
+namespace {
+
+const std::size_t kPointerSize = sizeof(void*);
+
+union Pointer2BinaryHelper {
+  void* ptr;
+  char bytes[kPointerSize];
+};
+
+// IncognitoMarker is to be stored in the clipboard whenever
+// current clipboard data is from incognito window.
+// Such data must be erased upon exit from incognito mode.
+class IncognitoMarker {
+ public:
+  explicit IncognitoMarker(void* profile_ptr) : profile_ptr_(profile_ptr) {}
+
+  void* profile_ptr() const { return profile_ptr_; }
+  std::vector<char> Serialize() const;
+  static void* Deserialize(const std::string& serialization);
+
+ private:
+  // Pointer to OffTheRecordProfileImpl
+  void* profile_ptr_;
+};
+
+std::vector<char> IncognitoMarker::Serialize() const {
+  Pointer2BinaryHelper helper;
+  helper.ptr = profile_ptr_;
+  return std::vector<char>(helper.bytes, helper.bytes + kPointerSize);
+}
+
+void* IncognitoMarker::Deserialize(const std::string& serialization) {
+  if (serialization.size() != kPointerSize)
+    return NULL;
+  Pointer2BinaryHelper helper;
+  memcpy(helper.bytes, serialization.c_str(), kPointerSize);
+  return helper.ptr;
+}
+} // anonymous namespace
+
+void AddIncognitoMarkerForOffTheRecordProfile(
+    ui::Clipboard::ObjectMap& objects,
+    Profile* profile) {
+  if (profile && profile->IsOffTheRecord()) {
+    IncognitoMarker marker(profile);
+    ui::Clipboard::ObjectMapParams incognito_marker_params;
+    incognito_marker_params.push_back(marker.Serialize());
+    objects[ui::Clipboard::CBF_INCOGNITO_MARKER].swap(incognito_marker_params);
+  }
+}
+
+bool IsThisIncognitoMarkerInClipboard(Profile* profile) {
+  if (profile) {
+#if defined(TOOLKIT_GTK)
+  // Only linux for now, other platforms don't implement
+  // Clipboard::GetIncognitoMarkerFormatType().
+  // TODO(vasilii): support other platforms.
+  std::string result;
+  ui::Clipboard::GetForCurrentThread()->ReadData(
+      ui::Clipboard::GetIncognitoMarkerFormatType(), &result);
+  return profile == IncognitoMarker::Deserialize(result);
+#endif
+  }
+  return false;
+}
+
+}  // namespace chrome