chrome/browser/ui/views/extensions/browser_action_drag_data.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/ui/views/extensions/browser_action_drag_data.h"
   6
   7 #include "base/logging.h"
   8 #include "base/pickle.h"
   9 #include "base/strings/string_util.h"
  10 #include "chrome/browser/profiles/profile.h"
  11 #include "ui/base/clipboard/clipboard.h"
  12
  13 namespace {
  14
  15 // The MIME type for the clipboard format for BrowserActionDragData.
  16 const char kClipboardFormatString[] = "chromium/x-browser-actions";
  17
  18 }
  19
  20 BrowserActionDragData::BrowserActionDragData()
  21     : profile_(NULL), index_(static_cast<size_t>(-1)) {
  22 }
  23
  24 BrowserActionDragData::BrowserActionDragData(
  25     const std::string& id, int index)
  26     : profile_(NULL), id_(id), index_(index) {
  27 }
  28
  29 bool BrowserActionDragData::GetDropFormats(
  30     std::set<ui::OSExchangeData::CustomFormat>* custom_formats) {
  31   custom_formats->insert(GetBrowserActionCustomFormat());
  32   return true;
  33 }
  34
  35 bool BrowserActionDragData::AreDropTypesRequired() {
  36   return true;
  37 }
  38
  39 bool BrowserActionDragData::CanDrop(const ui::OSExchangeData& data,
  40                                     const Profile* profile) {
  41   BrowserActionDragData drop_data;
  42   return drop_data.Read(data) && drop_data.IsFromProfile(profile);
  43 }
  44
  45 bool BrowserActionDragData::IsFromProfile(const Profile* profile) const {
  46   return profile_ == profile;
  47 }
  48
  49 #if defined(TOOLKIT_VIEWS)
  50 void BrowserActionDragData::Write(
  51     Profile* profile, ui::OSExchangeData* data) const {
  52   DCHECK(data);
  53   Pickle data_pickle;
  54   WriteToPickle(profile, &data_pickle);
  55   data->SetPickledData(GetBrowserActionCustomFormat(), data_pickle);
  56 }
  57
  58 bool BrowserActionDragData::Read(const ui::OSExchangeData& data) {
  59   if (!data.HasCustomFormat(GetBrowserActionCustomFormat()))
  60     return false;
  61
  62   Pickle drag_data_pickle;
  63   if (!data.GetPickledData(GetBrowserActionCustomFormat(), &drag_data_pickle))
  64     return false;
  65
  66   if (!ReadFromPickle(&drag_data_pickle))
  67     return false;
  68
  69   return true;
  70 }
  71
  72 // static
  73 const ui::OSExchangeData::CustomFormat&
  74 BrowserActionDragData::GetBrowserActionCustomFormat() {
  75   CR_DEFINE_STATIC_LOCAL(
  76       ui::OSExchangeData::CustomFormat,
  77       format,
  78       (ui::Clipboard::GetFormatType(kClipboardFormatString)));
  79
  80   return format;
  81 }
  82 #endif
  83
  84 void BrowserActionDragData::WriteToPickle(
  85     Profile* profile, Pickle* pickle) const {
  86   pickle->WriteBytes(&profile, sizeof(profile));
  87   pickle->WriteString(id_);
  88   pickle->WriteUInt64(index_);
  89 }
  90
  91 bool BrowserActionDragData::ReadFromPickle(Pickle* pickle) {
  92   PickleIterator data_iterator(*pickle);
  93
  94   const char* tmp;
  95   if (!data_iterator.ReadBytes(&tmp, sizeof(profile_)))
  96     return false;
  97   memcpy(&profile_, tmp, sizeof(profile_));
  98
  99   if (!data_iterator.ReadString(&id_))
 100     return false;
 101
 102   uint64 index;
 103   if (!data_iterator.ReadUInt64(&index))
 104     return false;
 105   index_ = static_cast<size_t>(index);
 106
 107   return true;
 108 }