ui/base/clipboard/clipboard

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This source file includes following definitions.
Acquire
Release
ClipboardOwnerWndProc
CreateGlobalData
BitmapHasInvalidPremultipliedColors
MakeBitmapOpaque
Serialize
Deserialize
Equals
WriteObjects
WriteText
WriteHTML
WriteRTF
WriteBookmark
WriteWebSmartPaste
WriteBitmap
WriteBitmapFromHandle
WriteData
WriteToClipboard
GetSequenceNumber
IsFormatAvailable
Clear
ReadAvailableTypes
ReadText
ReadAsciiText
ReadHTML
ReadRTF
ReadImage
ReadCustomData
ReadBookmark
ReadData
ParseBookmarkClipboardFormat
GetFormatType
GetUrlFormatType
GetUrlWFormatType
GetMozUrlFormatType
GetPlainTextFormatType
GetPlainTextWFormatType
GetFilenameFormatType
GetFilenameWFormatType
GetHtmlFormatType
GetRtfFormatType
GetBitmapFormatType
GetTextHtmlFormatType
GetCFHDropFormatType
GetFileDescriptorFormatType
GetFileContentZeroFormatType
GetIDListFormatType
GetWebKitSmartPasteFormatType
GetWebCustomDataFormatType
GetPepperCustomDataFormatType
FreeData
GetClipboardWindow
// 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.

// Many of these functions are based on those found in
// webkit/port/platform/PasteboardWin.cpp

#include "ui/base/clipboard/clipboard.h"

#include <shellapi.h>
#include <shlobj.h>

#include "base/basictypes.h"
#include "base/bind.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/memory/shared_memory.h"
#include "base/message_loop/message_loop.h"
#include "base/numerics/safe_conversions.h"
#include "base/stl_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_offset_string_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "base/win/message_window.h"
#include "base/win/scoped_gdi_object.h"
#include "base/win/scoped_hdc.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/base/clipboard/clipboard_util_win.h"
#include "ui/base/clipboard/custom_data_helper.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/size.h"

namespace ui {

namespace {

// A scoper to manage acquiring and automatically releasing the clipboard.
class ScopedClipboard {
 public:
  ScopedClipboard() : opened_(false) { }

  ~ScopedClipboard() {
    if (opened_)
      Release();
  }

  bool Acquire(HWND owner) {
    const int kMaxAttemptsToOpenClipboard = 5;

    if (opened_) {
      NOTREACHED();
      return false;
    }

    // Attempt to open the clipboard, which will acquire the Windows clipboard
    // lock.  This may fail if another process currently holds this lock.
    // We're willing to try a few times in the hopes of acquiring it.
    //
    // This turns out to be an issue when using remote desktop because the
    // rdpclip.exe process likes to read what we've written to the clipboard and
    // send it to the RDP client.  If we open and close the clipboard in quick
    // succession, we might be trying to open it while rdpclip.exe has it open,
    // See Bug 815425.
    //
    // In fact, we believe we'll only spin this loop over remote desktop.  In
    // normal situations, the user is initiating clipboard operations and there
    // shouldn't be contention.

    for (int attempts = 0; attempts < kMaxAttemptsToOpenClipboard; ++attempts) {
      // If we didn't manage to open the clipboard, sleep a bit and be hopeful.
      if (attempts != 0)
        ::Sleep(5);

      if (::OpenClipboard(owner)) {
        opened_ = true;
        return true;
      }
    }

    // We failed to acquire the clipboard.
    return false;
  }

  void Release() {
    if (opened_) {
      ::CloseClipboard();
      opened_ = false;
    } else {
      NOTREACHED();
    }
  }

 private:
  bool opened_;
};

bool ClipboardOwnerWndProc(UINT message,
                           WPARAM wparam,
                           LPARAM lparam,
                           LRESULT* result) {
  switch (message) {
  case WM_RENDERFORMAT:
    // This message comes when SetClipboardData was sent a null data handle
    // and now it's come time to put the data on the clipboard.
    // We always set data, so there isn't a need to actually do anything here.
    break;
  case WM_RENDERALLFORMATS:
    // This message comes when SetClipboardData was sent a null data handle
    // and now this application is about to quit, so it must put data on
    // the clipboard before it exits.
    // We always set data, so there isn't a need to actually do anything here.
    break;
  case WM_DRAWCLIPBOARD:
    break;
  case WM_DESTROY:
    break;
  case WM_CHANGECBCHAIN:
    break;
  default:
    return false;
  }

  *result = 0;
  return true;
}

template <typename charT>
HGLOBAL CreateGlobalData(const std::basic_string<charT>& str) {
  HGLOBAL data =
    ::GlobalAlloc(GMEM_MOVEABLE, ((str.size() + 1) * sizeof(charT)));
  if (data) {
    charT* raw_data = static_cast<charT*>(::GlobalLock(data));
    memcpy(raw_data, str.data(), str.size() * sizeof(charT));
    raw_data[str.size()] = '\0';
    ::GlobalUnlock(data);
  }
  return data;
};

bool BitmapHasInvalidPremultipliedColors(const SkBitmap& bitmap) {
  for (int x = 0; x < bitmap.width(); ++x) {
    for (int y = 0; y < bitmap.height(); ++y) {
      uint32_t pixel = *bitmap.getAddr32(x, y);
      if (SkColorGetR(pixel) > SkColorGetA(pixel) ||
          SkColorGetG(pixel) > SkColorGetA(pixel) ||
          SkColorGetB(pixel) > SkColorGetA(pixel))
        return true;
    }
  }
  return false;
}

void MakeBitmapOpaque(const SkBitmap& bitmap) {
  for (int x = 0; x < bitmap.width(); ++x) {
    for (int y = 0; y < bitmap.height(); ++y) {
      *bitmap.getAddr32(x, y) = SkColorSetA(*bitmap.getAddr32(x, y), 0xFF);
    }
  }
}

}  // namespace

Clipboard::FormatType::FormatType() : data_() {}

Clipboard::FormatType::FormatType(UINT native_format) : data_() {
  // There's no good way to actually initialize this in the constructor in
  // C++03.
  data_.cfFormat = native_format;
  data_.dwAspect = DVASPECT_CONTENT;
  data_.lindex = -1;
  data_.tymed = TYMED_HGLOBAL;
}

Clipboard::FormatType::FormatType(UINT native_format, LONG index) : data_() {
  // There's no good way to actually initialize this in the constructor in
  // C++03.
  data_.cfFormat = native_format;
  data_.dwAspect = DVASPECT_CONTENT;
  data_.lindex = index;
  data_.tymed = TYMED_HGLOBAL;
}

Clipboard::FormatType::~FormatType() {
}

std::string Clipboard::FormatType::Serialize() const {
  return base::IntToString(data_.cfFormat);
}

// static
Clipboard::FormatType Clipboard::FormatType::Deserialize(
    const std::string& serialization) {
  int clipboard_format = -1;
  if (!base::StringToInt(serialization, &clipboard_format)) {
    NOTREACHED();
    return FormatType();
  }
  return FormatType(clipboard_format);
}

bool Clipboard::FormatType::operator<(const FormatType& other) const {
  return ToUINT() < other.ToUINT();
}

bool Clipboard::FormatType::Equals(const FormatType& other) const {
  return ToUINT() == other.ToUINT();
}

Clipboard::Clipboard() {
  if (base::MessageLoopForUI::IsCurrent())
    clipboard_owner_.reset(new base::win::MessageWindow());
}

Clipboard::~Clipboard() {
}

void Clipboard::WriteObjects(ClipboardType type, const ObjectMap& objects) {
  DCHECK_EQ(type, CLIPBOARD_TYPE_COPY_PASTE);

  ScopedClipboard clipboard;
  if (!clipboard.Acquire(GetClipboardWindow()))
    return;

  ::EmptyClipboard();

  for (ObjectMap::const_iterator iter = objects.begin();
       iter != objects.end(); ++iter) {
    DispatchObject(static_cast<ObjectType>(iter->first), iter->second);
  }
}

void Clipboard::WriteText(const char* text_data, size_t text_len) {
  base::string16 text;
  base::UTF8ToUTF16(text_data, text_len, &text);
  HGLOBAL glob = CreateGlobalData(text);

  WriteToClipboard(CF_UNICODETEXT, glob);
}

void Clipboard::WriteHTML(const char* markup_data,
                          size_t markup_len,
                          const char* url_data,
                          size_t url_len) {
  std::string markup(markup_data, markup_len);
  std::string url;

  if (url_len > 0)
    url.assign(url_data, url_len);

  std::string html_fragment = ClipboardUtil::HtmlToCFHtml(markup, url);
  HGLOBAL glob = CreateGlobalData(html_fragment);

  WriteToClipboard(Clipboard::GetHtmlFormatType().ToUINT(), glob);
}

void Clipboard::WriteRTF(const char* rtf_data, size_t data_len) {
  WriteData(GetRtfFormatType(), rtf_data, data_len);
}

void Clipboard::WriteBookmark(const char* title_data,
                              size_t title_len,
                              const char* url_data,
                              size_t url_len) {
  std::string bookmark(title_data, title_len);
  bookmark.append(1, L'\n');
  bookmark.append(url_data, url_len);

  base::string16 wide_bookmark = base::UTF8ToWide(bookmark);
  HGLOBAL glob = CreateGlobalData(wide_bookmark);

  WriteToClipboard(GetUrlWFormatType().ToUINT(), glob);
}

void Clipboard::WriteWebSmartPaste() {
  DCHECK(clipboard_owner_->hwnd() != NULL);
  ::SetClipboardData(GetWebKitSmartPasteFormatType().ToUINT(), NULL);
}

void Clipboard::WriteBitmap(const SkBitmap& bitmap) {
  HDC dc = ::GetDC(NULL);

  // This doesn't actually cost us a memcpy when the bitmap comes from the
  // renderer as we load it into the bitmap using setPixels which just sets a
  // pointer.  Someone has to memcpy it into GDI, it might as well be us here.

  // TODO(darin): share data in gfx/bitmap_header.cc somehow
  BITMAPINFO bm_info = {0};
  bm_info.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
  bm_info.bmiHeader.biWidth = bitmap.width();
  bm_info.bmiHeader.biHeight = -bitmap.height();  // sets vertical orientation
  bm_info.bmiHeader.biPlanes = 1;
  bm_info.bmiHeader.biBitCount = 32;
  bm_info.bmiHeader.biCompression = BI_RGB;

  // ::CreateDIBSection allocates memory for us to copy our bitmap into.
  // Unfortunately, we can't write the created bitmap to the clipboard,
  // (see http://msdn2.microsoft.com/en-us/library/ms532292.aspx)
  void *bits;
  HBITMAP source_hbitmap =
      ::CreateDIBSection(dc, &bm_info, DIB_RGB_COLORS, &bits, NULL, 0);

  if (bits && source_hbitmap) {
    {
      SkAutoLockPixels bitmap_lock(bitmap);
      // Copy the bitmap out of shared memory and into GDI
      memcpy(bits, bitmap.getPixels(), bitmap.getSize());
    }

    // Now we have an HBITMAP, we can write it to the clipboard
    WriteBitmapFromHandle(source_hbitmap,
                          gfx::Size(bitmap.width(), bitmap.height()));
  }

  ::DeleteObject(source_hbitmap);
  ::ReleaseDC(NULL, dc);
}

void Clipboard::WriteBitmapFromHandle(HBITMAP source_hbitmap,
                                      const gfx::Size& size) {
  // We would like to just call ::SetClipboardData on the source_hbitmap,
  // but that bitmap might not be of a sort we can write to the clipboard.
  // For this reason, we create a new bitmap, copy the bits over, and then
  // write that to the clipboard.

  HDC dc = ::GetDC(NULL);
  HDC compatible_dc = ::CreateCompatibleDC(NULL);
  HDC source_dc = ::CreateCompatibleDC(NULL);

  // This is the HBITMAP we will eventually write to the clipboard
  HBITMAP hbitmap = ::CreateCompatibleBitmap(dc, size.width(), size.height());
  if (!hbitmap) {
    // Failed to create the bitmap
    ::DeleteDC(compatible_dc);
    ::DeleteDC(source_dc);
    ::ReleaseDC(NULL, dc);
    return;
  }

  HBITMAP old_hbitmap = (HBITMAP)SelectObject(compatible_dc, hbitmap);
  HBITMAP old_source = (HBITMAP)SelectObject(source_dc, source_hbitmap);

  // Now we need to blend it into an HBITMAP we can place on the clipboard
  BLENDFUNCTION bf = {AC_SRC_OVER, 0, 255, AC_SRC_ALPHA};
  ::GdiAlphaBlend(compatible_dc, 0, 0, size.width(), size.height(),
                  source_dc, 0, 0, size.width(), size.height(), bf);

  // Clean up all the handles we just opened
  ::SelectObject(compatible_dc, old_hbitmap);
  ::SelectObject(source_dc, old_source);
  ::DeleteObject(old_hbitmap);
  ::DeleteObject(old_source);
  ::DeleteDC(compatible_dc);
  ::DeleteDC(source_dc);
  ::ReleaseDC(NULL, dc);

  WriteToClipboard(CF_BITMAP, hbitmap);
}

void Clipboard::WriteData(const FormatType& format,
                          const char* data_data,
                          size_t data_len) {
  HGLOBAL hdata = ::GlobalAlloc(GMEM_MOVEABLE, data_len);
  if (!hdata)
    return;

  char* data = static_cast<char*>(::GlobalLock(hdata));
  memcpy(data, data_data, data_len);
  ::GlobalUnlock(data);
  WriteToClipboard(format.ToUINT(), hdata);
}

void Clipboard::WriteToClipboard(unsigned int format, HANDLE handle) {
  DCHECK(clipboard_owner_->hwnd() != NULL);
  if (handle && !::SetClipboardData(format, handle)) {
    DCHECK(ERROR_CLIPBOARD_NOT_OPEN != GetLastError());
    FreeData(format, handle);
  }
}

uint64 Clipboard::GetSequenceNumber(ClipboardType type) {
  DCHECK_EQ(type, CLIPBOARD_TYPE_COPY_PASTE);
  return ::GetClipboardSequenceNumber();
}

bool Clipboard::IsFormatAvailable(const Clipboard::FormatType& format,
                                  ClipboardType type) const {
  DCHECK_EQ(type, CLIPBOARD_TYPE_COPY_PASTE);
  return ::IsClipboardFormatAvailable(format.ToUINT()) != FALSE;
}

void Clipboard::Clear(ClipboardType type) {
  DCHECK_EQ(type, CLIPBOARD_TYPE_COPY_PASTE);
  ScopedClipboard clipboard;
  if (!clipboard.Acquire(GetClipboardWindow()))
    return;

  ::EmptyClipboard();
}

void Clipboard::ReadAvailableTypes(ClipboardType type,
                                   std::vector<base::string16>* types,
                                   bool* contains_filenames) const {
  if (!types || !contains_filenames) {
    NOTREACHED();
    return;
  }

  types->clear();
  if (::IsClipboardFormatAvailable(GetPlainTextFormatType().ToUINT()))
    types->push_back(base::UTF8ToUTF16(kMimeTypeText));
  if (::IsClipboardFormatAvailable(GetHtmlFormatType().ToUINT()))
    types->push_back(base::UTF8ToUTF16(kMimeTypeHTML));
  if (::IsClipboardFormatAvailable(GetRtfFormatType().ToUINT()))
    types->push_back(base::UTF8ToUTF16(kMimeTypeRTF));
  if (::IsClipboardFormatAvailable(CF_DIB))
    types->push_back(base::UTF8ToUTF16(kMimeTypePNG));
  *contains_filenames = false;

  // Acquire the clipboard.
  ScopedClipboard clipboard;
  if (!clipboard.Acquire(GetClipboardWindow()))
    return;

  HANDLE hdata = ::GetClipboardData(GetWebCustomDataFormatType().ToUINT());
  if (!hdata)
    return;

  ReadCustomDataTypes(::GlobalLock(hdata), ::GlobalSize(hdata), types);
  ::GlobalUnlock(hdata);
}

void Clipboard::ReadText(ClipboardType type, base::string16* result) const {
  DCHECK_EQ(type, CLIPBOARD_TYPE_COPY_PASTE);
  if (!result) {
    NOTREACHED();
    return;
  }

  result->clear();

  // Acquire the clipboard.
  ScopedClipboard clipboard;
  if (!clipboard.Acquire(GetClipboardWindow()))
    return;

  HANDLE data = ::GetClipboardData(CF_UNICODETEXT);
  if (!data)
    return;

  result->assign(static_cast<const base::char16*>(::GlobalLock(data)));
  ::GlobalUnlock(data);
}

void Clipboard::ReadAsciiText(ClipboardType type, std::string* result) const {
  DCHECK_EQ(type, CLIPBOARD_TYPE_COPY_PASTE);
  if (!result) {
    NOTREACHED();
    return;
  }

  result->clear();

  // Acquire the clipboard.
  ScopedClipboard clipboard;
  if (!clipboard.Acquire(GetClipboardWindow()))
    return;

  HANDLE data = ::GetClipboardData(CF_TEXT);
  if (!data)
    return;

  result->assign(static_cast<const char*>(::GlobalLock(data)));
  ::GlobalUnlock(data);
}

void Clipboard::ReadHTML(ClipboardType type,
                         base::string16* markup,
                         std::string* src_url,
                         uint32* fragment_start,
                         uint32* fragment_end) const {
  DCHECK_EQ(type, CLIPBOARD_TYPE_COPY_PASTE);

  markup->clear();
  // TODO(dcheng): Remove these checks, I don't think they should be optional.
  DCHECK(src_url);
  if (src_url)
    src_url->clear();
  *fragment_start = 0;
  *fragment_end = 0;

  // Acquire the clipboard.
  ScopedClipboard clipboard;
  if (!clipboard.Acquire(GetClipboardWindow()))
    return;

  HANDLE data = ::GetClipboardData(GetHtmlFormatType().ToUINT());
  if (!data)
    return;

  std::string cf_html(static_cast<const char*>(::GlobalLock(data)));
  ::GlobalUnlock(data);

  size_t html_start = std::string::npos;
  size_t start_index = std::string::npos;
  size_t end_index = std::string::npos;
  ClipboardUtil::CFHtmlExtractMetadata(cf_html, src_url, &html_start,
                                       &start_index, &end_index);

  // This might happen if the contents of the clipboard changed and CF_HTML is
  // no longer available.
  if (start_index == std::string::npos ||
      end_index == std::string::npos ||
      html_start == std::string::npos)
    return;

  if (start_index < html_start || end_index < start_index)
    return;

  std::vector<size_t> offsets;
  offsets.push_back(start_index - html_start);
  offsets.push_back(end_index - html_start);
  markup->assign(base::UTF8ToUTF16AndAdjustOffsets(cf_html.data() + html_start,
                                                   &offsets));
  *fragment_start = base::checked_cast<uint32>(offsets[0]);
  *fragment_end = base::checked_cast<uint32>(offsets[1]);
}

void Clipboard::ReadRTF(ClipboardType type, std::string* result) const {
  DCHECK_EQ(type, CLIPBOARD_TYPE_COPY_PASTE);

  ReadData(GetRtfFormatType(), result);
}

SkBitmap Clipboard::ReadImage(ClipboardType type) const {
  DCHECK_EQ(type, CLIPBOARD_TYPE_COPY_PASTE);

  // Acquire the clipboard.
  ScopedClipboard clipboard;
  if (!clipboard.Acquire(GetClipboardWindow()))
    return SkBitmap();

  // We use a DIB rather than a DDB here since ::GetObject() with the
  // HBITMAP returned from ::GetClipboardData(CF_BITMAP) always reports a color
  // depth of 32bpp.
  BITMAPINFO* bitmap = static_cast<BITMAPINFO*>(::GetClipboardData(CF_DIB));
  if (!bitmap)
    return SkBitmap();
  int color_table_length = 0;
  switch (bitmap->bmiHeader.biBitCount) {
    case 1:
    case 4:
    case 8:
      color_table_length = bitmap->bmiHeader.biClrUsed
          ? bitmap->bmiHeader.biClrUsed
          : 1 << bitmap->bmiHeader.biBitCount;
      break;
    case 16:
    case 32:
      if (bitmap->bmiHeader.biCompression == BI_BITFIELDS)
        color_table_length = 3;
      break;
    case 24:
      break;
    default:
      NOTREACHED();
  }
  const void* bitmap_bits = reinterpret_cast<const char*>(bitmap)
      + bitmap->bmiHeader.biSize + color_table_length * sizeof(RGBQUAD);

  gfx::Canvas canvas(gfx::Size(bitmap->bmiHeader.biWidth,
                               bitmap->bmiHeader.biHeight),
                     1.0f,
                     false);
  {
    skia::ScopedPlatformPaint scoped_platform_paint(canvas.sk_canvas());
    HDC dc = scoped_platform_paint.GetPlatformSurface();
    ::SetDIBitsToDevice(dc, 0, 0, bitmap->bmiHeader.biWidth,
                        bitmap->bmiHeader.biHeight, 0, 0, 0,
                        bitmap->bmiHeader.biHeight, bitmap_bits, bitmap,
                        DIB_RGB_COLORS);
  }
  // Windows doesn't really handle alpha channels well in many situations. When
  // the source image is < 32 bpp, we force the bitmap to be opaque. When the
  // source image is 32 bpp, the alpha channel might still contain garbage data.
  // Since Windows uses premultiplied alpha, we scan for instances where
  // (R, G, B) > A. If there are any invalid premultiplied colors in the image,
  // we assume the alpha channel contains garbage and force the bitmap to be
  // opaque as well. Note that this  heuristic will fail on a transparent bitmap
  // containing only black pixels...
  const SkBitmap& device_bitmap =
      canvas.sk_canvas()->getDevice()->accessBitmap(true);
  {
    SkAutoLockPixels lock(device_bitmap);
    bool has_invalid_alpha_channel = bitmap->bmiHeader.biBitCount < 32 ||
        BitmapHasInvalidPremultipliedColors(device_bitmap);
    if (has_invalid_alpha_channel) {
      MakeBitmapOpaque(device_bitmap);
    }
  }

  return canvas.ExtractImageRep().sk_bitmap();
}

void Clipboard::ReadCustomData(ClipboardType clipboard_type,
                               const base::string16& type,
                               base::string16* result) const {
  DCHECK_EQ(clipboard_type, CLIPBOARD_TYPE_COPY_PASTE);

  // Acquire the clipboard.
  ScopedClipboard clipboard;
  if (!clipboard.Acquire(GetClipboardWindow()))
    return;

  HANDLE hdata = ::GetClipboardData(GetWebCustomDataFormatType().ToUINT());
  if (!hdata)
    return;

  ReadCustomDataForType(::GlobalLock(hdata), ::GlobalSize(hdata), type, result);
  ::GlobalUnlock(hdata);
}

void Clipboard::ReadBookmark(base::string16* title, std::string* url) const {
  if (title)
    title->clear();

  if (url)
    url->clear();

  // Acquire the clipboard.
  ScopedClipboard clipboard;
  if (!clipboard.Acquire(GetClipboardWindow()))
    return;

  HANDLE data = ::GetClipboardData(GetUrlWFormatType().ToUINT());
  if (!data)
    return;

  base::string16 bookmark(static_cast<const base::char16*>(::GlobalLock(data)));
  ::GlobalUnlock(data);

  ParseBookmarkClipboardFormat(bookmark, title, url);
}

void Clipboard::ReadData(const FormatType& format, std::string* result) const {
  if (!result) {
    NOTREACHED();
    return;
  }

  ScopedClipboard clipboard;
  if (!clipboard.Acquire(GetClipboardWindow()))
    return;

  HANDLE data = ::GetClipboardData(format.ToUINT());
  if (!data)
    return;

  result->assign(static_cast<const char*>(::GlobalLock(data)),
                 ::GlobalSize(data));
  ::GlobalUnlock(data);
}

// static
void Clipboard::ParseBookmarkClipboardFormat(const base::string16& bookmark,
                                             base::string16* title,
                                             std::string* url) {
  const base::string16 kDelim = base::ASCIIToUTF16("\r\n");

  const size_t title_end = bookmark.find_first_of(kDelim);
  if (title)
    title->assign(bookmark.substr(0, title_end));

  if (url) {
    const size_t url_start = bookmark.find_first_not_of(kDelim, title_end);
    if (url_start != base::string16::npos) {
      *url = base::UTF16ToUTF8(
          bookmark.substr(url_start, base::string16::npos));
    }
  }
}

// static
Clipboard::FormatType Clipboard::GetFormatType(
    const std::string& format_string) {
  return FormatType(
      ::RegisterClipboardFormat(base::ASCIIToWide(format_string).c_str()));
}

// static
const Clipboard::FormatType& Clipboard::GetUrlFormatType() {
  CR_DEFINE_STATIC_LOCAL(
      FormatType, type, (::RegisterClipboardFormat(CFSTR_INETURLA)));
  return type;
}

// static
const Clipboard::FormatType& Clipboard::GetUrlWFormatType() {
  CR_DEFINE_STATIC_LOCAL(
      FormatType, type, (::RegisterClipboardFormat(CFSTR_INETURLW)));
  return type;
}

// static
const Clipboard::FormatType& Clipboard::GetMozUrlFormatType() {
  CR_DEFINE_STATIC_LOCAL(
      FormatType, type, (::RegisterClipboardFormat(L"text/x-moz-url")));
  return type;
}

// static
const Clipboard::FormatType& Clipboard::GetPlainTextFormatType() {
  CR_DEFINE_STATIC_LOCAL(FormatType, type, (CF_TEXT));
  return type;
}

// static
const Clipboard::FormatType& Clipboard::GetPlainTextWFormatType() {
  CR_DEFINE_STATIC_LOCAL(FormatType, type, (CF_UNICODETEXT));
  return type;
}

// static
const Clipboard::FormatType& Clipboard::GetFilenameFormatType() {
  CR_DEFINE_STATIC_LOCAL(
      FormatType, type, (::RegisterClipboardFormat(CFSTR_FILENAMEA)));
  return type;
}

// static
const Clipboard::FormatType& Clipboard::GetFilenameWFormatType() {
  CR_DEFINE_STATIC_LOCAL(
      FormatType, type, (::RegisterClipboardFormat(CFSTR_FILENAMEW)));
  return type;
}

// MS HTML Format
// static
const Clipboard::FormatType& Clipboard::GetHtmlFormatType() {
  CR_DEFINE_STATIC_LOCAL(
      FormatType, type, (::RegisterClipboardFormat(L"HTML Format")));
  return type;
}

// MS RTF Format
// static
const Clipboard::FormatType& Clipboard::GetRtfFormatType() {
  CR_DEFINE_STATIC_LOCAL(
      FormatType, type, (::RegisterClipboardFormat(L"Rich Text Format")));
  return type;
}

// static
const Clipboard::FormatType& Clipboard::GetBitmapFormatType() {
  CR_DEFINE_STATIC_LOCAL(FormatType, type, (CF_BITMAP));
  return type;
}

// Firefox text/html
// static
const Clipboard::FormatType& Clipboard::GetTextHtmlFormatType() {
  CR_DEFINE_STATIC_LOCAL(
      FormatType, type, (::RegisterClipboardFormat(L"text/html")));
  return type;
}

// static
const Clipboard::FormatType& Clipboard::GetCFHDropFormatType() {
  CR_DEFINE_STATIC_LOCAL(FormatType, type, (CF_HDROP));
  return type;
}

// static
const Clipboard::FormatType& Clipboard::GetFileDescriptorFormatType() {
  CR_DEFINE_STATIC_LOCAL(
      FormatType, type, (::RegisterClipboardFormat(CFSTR_FILEDESCRIPTOR)));
  return type;
}

// static
const Clipboard::FormatType& Clipboard::GetFileContentZeroFormatType() {
  CR_DEFINE_STATIC_LOCAL(
      FormatType, type, (::RegisterClipboardFormat(CFSTR_FILECONTENTS), 0));
  return type;
}

// static
const Clipboard::FormatType& Clipboard::GetIDListFormatType() {
  CR_DEFINE_STATIC_LOCAL(
      FormatType, type, (::RegisterClipboardFormat(CFSTR_SHELLIDLIST)));
  return type;
}

// static
const Clipboard::FormatType& Clipboard::GetWebKitSmartPasteFormatType() {
  CR_DEFINE_STATIC_LOCAL(
      FormatType,
      type,
      (::RegisterClipboardFormat(L"WebKit Smart Paste Format")));
  return type;
}

// static
const Clipboard::FormatType& Clipboard::GetWebCustomDataFormatType() {
  // TODO(dcheng): This name is temporary. See http://crbug.com/106449.
  CR_DEFINE_STATIC_LOCAL(
      FormatType,
      type,
      (::RegisterClipboardFormat(L"Chromium Web Custom MIME Data Format")));
  return type;
}

// static
const Clipboard::FormatType& Clipboard::GetPepperCustomDataFormatType() {
  CR_DEFINE_STATIC_LOCAL(
      FormatType,
      type,
      (::RegisterClipboardFormat(L"Chromium Pepper MIME Data Format")));
  return type;
}

// static
void Clipboard::FreeData(unsigned int format, HANDLE data) {
  if (format == CF_BITMAP)
    ::DeleteObject(static_cast<HBITMAP>(data));
  else
    ::GlobalFree(data);
}

HWND Clipboard::GetClipboardWindow() const {
  if (!clipboard_owner_)
    return NULL;

  if (clipboard_owner_->hwnd() == NULL)
    clipboard_owner_->Create(base::Bind(&ClipboardOwnerWndProc));

  return clipboard_owner_->hwnd();
}

}  // namespace ui
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root/ui/base/clipboard/clipboard_win.cc

DEFINITIONS
