blob: c09780fdf9e2ca5eceb72e40132bba5a00255096 [file] [log] [blame]
// 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/dragdrop/os_exchange_data_provider_win.h"
#include <stdint.h>
#include <algorithm>
#include "base/files/file_path.h"
#include "base/i18n/file_util_icu.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/memory/ptr_util.h"
#include "base/pickle.h"
#include "base/strings/utf_string_conversions.h"
#include "base/win/scoped_hglobal.h"
#include "net/base/filename_util.h"
#include "ui/base/clipboard/clipboard.h"
#include "ui/base/clipboard/clipboard_util_win.h"
#include "ui/base/dragdrop/file_info.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/strings/grit/ui_strings.h"
#include "url/gurl.h"
namespace ui {
static const Clipboard::FormatType& GetRendererTaintFormatType() {
CR_DEFINE_STATIC_LOCAL(
Clipboard::FormatType,
format,
(ui::Clipboard::GetFormatType("chromium/x-renderer-taint")));
return format;
}
// Creates a new STGMEDIUM object to hold the specified text. The caller
// owns the resulting object. The "Bytes" version does not NULL terminate, the
// string version does.
static STGMEDIUM* GetStorageForBytes(const void* data, size_t bytes);
template <typename T>
static STGMEDIUM* GetStorageForString(const std::basic_string<T>& data);
// Creates the contents of an Internet Shortcut file for the given URL.
static void GetInternetShortcutFileContents(const GURL& url, std::string* data);
// Creates a valid file name given a suggested title and URL.
static void CreateValidFileNameFromTitle(const GURL& url,
const base::string16& title,
base::string16* validated);
// Creates a new STGMEDIUM object to hold a file.
static STGMEDIUM* GetStorageForFileName(const base::FilePath& path);
static STGMEDIUM* GetIDListStorageForFileName(const base::FilePath& path);
// Creates a File Descriptor for the creation of a file to the given URL and
// returns a handle to it.
static STGMEDIUM* GetStorageForFileDescriptor(const base::FilePath& path);
///////////////////////////////////////////////////////////////////////////////
// FormatEtcEnumerator
//
// This object implements an enumeration interface. The existence of an
// implementation of this interface is exposed to clients through
// OSExchangeData's EnumFormatEtc method. Our implementation is nobody's
// business but our own, so it lives in this file.
//
// This Windows API is truly a gem. It wants to be an enumerator but assumes
// some sort of sequential data (why not just use an array?). See comments
// throughout.
//
class FormatEtcEnumerator final : public IEnumFORMATETC {
public:
FormatEtcEnumerator(DataObjectImpl::StoredData::const_iterator begin,
DataObjectImpl::StoredData::const_iterator end);
~FormatEtcEnumerator();
// IEnumFORMATETC implementation:
HRESULT __stdcall Next(ULONG count,
FORMATETC* elements_array,
ULONG* elements_fetched) override;
HRESULT __stdcall Skip(ULONG skip_count) override;
HRESULT __stdcall Reset() override;
HRESULT __stdcall Clone(IEnumFORMATETC** clone) override;
// IUnknown implementation:
HRESULT __stdcall QueryInterface(const IID& iid, void** object) override;
ULONG __stdcall AddRef() override;
ULONG __stdcall Release() override;
private:
// This can only be called from |CloneFromOther|, since it initializes the
// contents_ from the other enumerator's contents.
FormatEtcEnumerator() : cursor_(0), ref_count_(0) {
}
// Clone a new FormatEtc from another instance of this enumeration.
static FormatEtcEnumerator* CloneFromOther(const FormatEtcEnumerator* other);
private:
// We are _forced_ to use a vector as our internal data model as Windows'
// retarded IEnumFORMATETC API assumes a deterministic ordering of elements
// through methods like Next and Skip. This exposes the underlying data
// structure to the user. Bah.
ScopedVector<FORMATETC> contents_;
// The cursor of the active enumeration - an index into |contents_|.
size_t cursor_;
LONG ref_count_;
DISALLOW_COPY_AND_ASSIGN(FormatEtcEnumerator);
};
// Safely makes a copy of all of the relevant bits of a FORMATETC object.
static void CloneFormatEtc(FORMATETC* source, FORMATETC* clone) {
*clone = *source;
if (source->ptd) {
source->ptd =
static_cast<DVTARGETDEVICE*>(CoTaskMemAlloc(sizeof(DVTARGETDEVICE)));
*(clone->ptd) = *(source->ptd);
}
}
FormatEtcEnumerator::FormatEtcEnumerator(
DataObjectImpl::StoredData::const_iterator start,
DataObjectImpl::StoredData::const_iterator end)
: cursor_(0), ref_count_(0) {
// Copy FORMATETC data from our source into ourselves.
while (start != end) {
FORMATETC* format_etc = new FORMATETC;
CloneFormatEtc(&(*start)->format_etc, format_etc);
contents_.push_back(format_etc);
++start;
}
}
FormatEtcEnumerator::~FormatEtcEnumerator() {
}
STDMETHODIMP FormatEtcEnumerator::Next(
ULONG count, FORMATETC* elements_array, ULONG* elements_fetched) {
// MSDN says |elements_fetched| is allowed to be NULL if count is 1.
if (!elements_fetched)
DCHECK_EQ(count, 1ul);
// This method copies count elements into |elements_array|.
ULONG index = 0;
while (cursor_ < contents_.size() && index < count) {
CloneFormatEtc(contents_[cursor_], &elements_array[index]);
++cursor_;
++index;
}
// The out param is for how many we actually copied.
if (elements_fetched)
*elements_fetched = index;
// If the two don't agree, then we fail.
return index == count ? S_OK : S_FALSE;
}
STDMETHODIMP FormatEtcEnumerator::Skip(ULONG skip_count) {
cursor_ += skip_count;
// MSDN implies it's OK to leave the enumerator trashed.
// "Whatever you say, boss"
return cursor_ <= contents_.size() ? S_OK : S_FALSE;
}
STDMETHODIMP FormatEtcEnumerator::Reset() {
cursor_ = 0;
return S_OK;
}
STDMETHODIMP FormatEtcEnumerator::Clone(IEnumFORMATETC** clone) {
// Clone the current enumerator in its exact state, including cursor.
FormatEtcEnumerator* e = CloneFromOther(this);
e->AddRef();
*clone = e;
return S_OK;
}
STDMETHODIMP FormatEtcEnumerator::QueryInterface(const IID& iid,
void** object) {
*object = NULL;
if (IsEqualIID(iid, IID_IUnknown) || IsEqualIID(iid, IID_IEnumFORMATETC)) {
*object = this;
} else {
return E_NOINTERFACE;
}
AddRef();
return S_OK;
}
ULONG FormatEtcEnumerator::AddRef() {
return InterlockedIncrement(&ref_count_);
}
ULONG FormatEtcEnumerator::Release() {
if (InterlockedDecrement(&ref_count_) == 0) {
ULONG copied_refcnt = ref_count_;
delete this;
return copied_refcnt;
}
return ref_count_;
}
// static
FormatEtcEnumerator* FormatEtcEnumerator::CloneFromOther(
const FormatEtcEnumerator* other) {
FormatEtcEnumerator* e = new FormatEtcEnumerator;
// Copy FORMATETC data from our source into ourselves.
ScopedVector<FORMATETC>::const_iterator start = other->contents_.begin();
while (start != other->contents_.end()) {
FORMATETC* format_etc = new FORMATETC;
CloneFormatEtc(*start, format_etc);
e->contents_.push_back(format_etc);
++start;
}
// Carry over
e->cursor_ = other->cursor_;
return e;
}
///////////////////////////////////////////////////////////////////////////////
// OSExchangeDataProviderWin, public:
// static
bool OSExchangeDataProviderWin::HasPlainTextURL(IDataObject* source) {
base::string16 plain_text;
return (ClipboardUtil::GetPlainText(source, &plain_text) &&
!plain_text.empty() && GURL(plain_text).is_valid());
}
// static
bool OSExchangeDataProviderWin::GetPlainTextURL(IDataObject* source,
GURL* url) {
base::string16 plain_text;
if (ClipboardUtil::GetPlainText(source, &plain_text) &&
!plain_text.empty()) {
GURL gurl(plain_text);
if (gurl.is_valid()) {
*url = gurl;
return true;
}
}
return false;
}
// static
DataObjectImpl* OSExchangeDataProviderWin::GetDataObjectImpl(
const OSExchangeData& data) {
return static_cast<const OSExchangeDataProviderWin*>(&data.provider())->
data_.get();
}
// static
IDataObject* OSExchangeDataProviderWin::GetIDataObject(
const OSExchangeData& data) {
return static_cast<const OSExchangeDataProviderWin*>(&data.provider())->
data_object();
}
// static
IDataObjectAsyncCapability* OSExchangeDataProviderWin::GetIAsyncOperation(
const OSExchangeData& data) {
return static_cast<const OSExchangeDataProviderWin*>(&data.provider())->
async_operation();
}
OSExchangeDataProviderWin::OSExchangeDataProviderWin(IDataObject* source)
: data_(new DataObjectImpl()),
source_object_(source) {
}
OSExchangeDataProviderWin::OSExchangeDataProviderWin()
: data_(new DataObjectImpl()),
source_object_(data_.get()) {
}
OSExchangeDataProviderWin::~OSExchangeDataProviderWin() {
}
std::unique_ptr<OSExchangeData::Provider>
OSExchangeDataProviderWin::Clone() const {
return base::MakeUnique<OSExchangeDataProviderWin>(data_object());
}
void OSExchangeDataProviderWin::MarkOriginatedFromRenderer() {
STGMEDIUM* storage = GetStorageForString(std::string());
data_->contents_.push_back(new DataObjectImpl::StoredDataInfo(
GetRendererTaintFormatType().ToFormatEtc(), storage));
}
bool OSExchangeDataProviderWin::DidOriginateFromRenderer() const {
return HasCustomFormat(GetRendererTaintFormatType());
}
void OSExchangeDataProviderWin::SetString(const base::string16& data) {
STGMEDIUM* storage = GetStorageForString(data);
data_->contents_.push_back(new DataObjectImpl::StoredDataInfo(
Clipboard::GetPlainTextWFormatType().ToFormatEtc(), storage));
// Also add the UTF8-encoded version.
storage = GetStorageForString(base::UTF16ToUTF8(data));
data_->contents_.push_back(new DataObjectImpl::StoredDataInfo(
Clipboard::GetPlainTextFormatType().ToFormatEtc(), storage));
}
void OSExchangeDataProviderWin::SetURL(const GURL& url,
const base::string16& title) {
// NOTE WELL:
// Every time you change the order of the first two CLIPFORMATS that get
// added here, you need to update the EnumerationViaCOM test case in
// the _unittest.cc file to reflect the new arrangement otherwise that test
// will fail! It assumes an insertion order.
// Add text/x-moz-url for drags from Firefox
base::string16 x_moz_url_str = base::UTF8ToUTF16(url.spec());
x_moz_url_str += '\n';
x_moz_url_str += title;
STGMEDIUM* storage = GetStorageForString(x_moz_url_str);
data_->contents_.push_back(new DataObjectImpl::StoredDataInfo(
Clipboard::GetMozUrlFormatType().ToFormatEtc(), storage));
// Add a .URL shortcut file for dragging to Explorer.
base::string16 valid_file_name;
CreateValidFileNameFromTitle(url, title, &valid_file_name);
std::string shortcut_url_file_contents;
GetInternetShortcutFileContents(url, &shortcut_url_file_contents);
SetFileContents(base::FilePath(valid_file_name), shortcut_url_file_contents);
// Add a UniformResourceLocator link for apps like IE and Word.
storage = GetStorageForString(base::UTF8ToUTF16(url.spec()));
data_->contents_.push_back(new DataObjectImpl::StoredDataInfo(
Clipboard::GetUrlWFormatType().ToFormatEtc(), storage));
storage = GetStorageForString(url.spec());
data_->contents_.push_back(new DataObjectImpl::StoredDataInfo(
Clipboard::GetUrlFormatType().ToFormatEtc(), storage));
// TODO(beng): add CF_HTML.
// http://code.google.com/p/chromium/issues/detail?id=6767
// Also add text representations (these should be last since they're the
// least preferable).
SetString(base::UTF8ToUTF16(url.spec()));
}
void OSExchangeDataProviderWin::SetFilename(const base::FilePath& path) {
STGMEDIUM* storage = GetStorageForFileName(path);
DataObjectImpl::StoredDataInfo* info = new DataObjectImpl::StoredDataInfo(
Clipboard::GetCFHDropFormatType().ToFormatEtc(), storage);
data_->contents_.push_back(info);
storage = GetIDListStorageForFileName(path);
if (!storage)
return;
info = new DataObjectImpl::StoredDataInfo(
Clipboard::GetIDListFormatType().ToFormatEtc(), storage);
data_->contents_.push_back(info);
}
void OSExchangeDataProviderWin::SetFilenames(
const std::vector<FileInfo>& filenames) {
for (size_t i = 0; i < filenames.size(); ++i) {
STGMEDIUM* storage = GetStorageForFileName(filenames[i].path);
DataObjectImpl::StoredDataInfo* info = new DataObjectImpl::StoredDataInfo(
Clipboard::GetCFHDropFormatType().ToFormatEtc(), storage);
data_->contents_.push_back(info);
}
}
void OSExchangeDataProviderWin::SetPickledData(
const Clipboard::FormatType& format,
const base::Pickle& data) {
STGMEDIUM* storage = GetStorageForBytes(data.data(), data.size());
data_->contents_.push_back(
new DataObjectImpl::StoredDataInfo(format.ToFormatEtc(), storage));
}
void OSExchangeDataProviderWin::SetFileContents(
const base::FilePath& filename,
const std::string& file_contents) {
// Add CFSTR_FILEDESCRIPTOR
STGMEDIUM* storage = GetStorageForFileDescriptor(filename);
data_->contents_.push_back(new DataObjectImpl::StoredDataInfo(
Clipboard::GetFileDescriptorFormatType().ToFormatEtc(), storage));
// Add CFSTR_FILECONTENTS
storage = GetStorageForBytes(file_contents.data(), file_contents.length());
data_->contents_.push_back(new DataObjectImpl::StoredDataInfo(
Clipboard::GetFileContentZeroFormatType().ToFormatEtc(), storage));
}
void OSExchangeDataProviderWin::SetHtml(const base::string16& html,
const GURL& base_url) {
// Add both MS CF_HTML and text/html format. CF_HTML should be in utf-8.
std::string utf8_html = base::UTF16ToUTF8(html);
std::string url = base_url.is_valid() ? base_url.spec() : std::string();
std::string cf_html = ClipboardUtil::HtmlToCFHtml(utf8_html, url);
STGMEDIUM* storage = GetStorageForBytes(cf_html.c_str(), cf_html.size());
data_->contents_.push_back(new DataObjectImpl::StoredDataInfo(
Clipboard::GetHtmlFormatType().ToFormatEtc(), storage));
STGMEDIUM* storage_plain = GetStorageForBytes(utf8_html.c_str(),
utf8_html.size());
data_->contents_.push_back(new DataObjectImpl::StoredDataInfo(
Clipboard::GetTextHtmlFormatType().ToFormatEtc(), storage_plain));
}
bool OSExchangeDataProviderWin::GetString(base::string16* data) const {
return ClipboardUtil::GetPlainText(source_object_.get(), data);
}
bool OSExchangeDataProviderWin::GetURLAndTitle(
OSExchangeData::FilenameToURLPolicy policy,
GURL* url,
base::string16* title) const {
base::string16 url_str;
bool success = ClipboardUtil::GetUrl(
source_object_.get(), url, title,
policy == OSExchangeData::CONVERT_FILENAMES ? true : false);
if (success) {
DCHECK(url->is_valid());
return true;
} else if (GetPlainTextURL(source_object_.get(), url)) {
if (url->is_valid())
*title = net::GetSuggestedFilename(*url, "", "", "", "", std::string());
else
title->clear();
return true;
}
return false;
}
bool OSExchangeDataProviderWin::GetFilename(base::FilePath* path) const {
std::vector<base::string16> filenames;
bool success = ClipboardUtil::GetFilenames(source_object_.get(), &filenames);
if (success)
*path = base::FilePath(filenames[0]);
return success;
}
bool OSExchangeDataProviderWin::GetFilenames(
std::vector<FileInfo>* filenames) const {
std::vector<base::string16> filenames_local;
bool success =
ClipboardUtil::GetFilenames(source_object_.get(), &filenames_local);
if (success) {
for (size_t i = 0; i < filenames_local.size(); ++i)
filenames->push_back(
FileInfo(base::FilePath(filenames_local[i]), base::FilePath()));
}
return success;
}
bool OSExchangeDataProviderWin::GetPickledData(
const Clipboard::FormatType& format,
base::Pickle* data) const {
DCHECK(data);
bool success = false;
STGMEDIUM medium;
FORMATETC format_etc = format.ToFormatEtc();
if (SUCCEEDED(source_object_->GetData(&format_etc, &medium))) {
if (medium.tymed & TYMED_HGLOBAL) {
base::win::ScopedHGlobal<char*> c_data(medium.hGlobal);
DCHECK_GT(c_data.Size(), 0u);
*data = base::Pickle(c_data.get(), static_cast<int>(c_data.Size()));
success = true;
}
ReleaseStgMedium(&medium);
}
return success;
}
bool OSExchangeDataProviderWin::GetFileContents(
base::FilePath* filename,
std::string* file_contents) const {
base::string16 filename_str;
if (!ClipboardUtil::GetFileContents(source_object_.get(), &filename_str,
file_contents)) {
return false;
}
*filename = base::FilePath(filename_str);
return true;
}
bool OSExchangeDataProviderWin::GetHtml(base::string16* html,
GURL* base_url) const {
std::string url;
bool success = ClipboardUtil::GetHtml(source_object_.get(), html, &url);
if (success)
*base_url = GURL(url);
return success;
}
bool OSExchangeDataProviderWin::HasString() const {
return ClipboardUtil::HasPlainText(source_object_.get());
}
bool OSExchangeDataProviderWin::HasURL(
OSExchangeData::FilenameToURLPolicy policy) const {
return (ClipboardUtil::HasUrl(
source_object_.get(),
policy == OSExchangeData::CONVERT_FILENAMES ? true : false) ||
HasPlainTextURL(source_object_.get()));
}
bool OSExchangeDataProviderWin::HasFile() const {
return ClipboardUtil::HasFilenames(source_object_.get());
}
bool OSExchangeDataProviderWin::HasFileContents() const {
return ClipboardUtil::HasFileContents(source_object_.get());
}
bool OSExchangeDataProviderWin::HasHtml() const {
return ClipboardUtil::HasHtml(source_object_.get());
}
bool OSExchangeDataProviderWin::HasCustomFormat(
const Clipboard::FormatType& format) const {
FORMATETC format_etc = format.ToFormatEtc();
return (source_object_->QueryGetData(&format_etc) == S_OK);
}
void OSExchangeDataProviderWin::SetDownloadFileInfo(
const OSExchangeData::DownloadFileInfo& download) {
// If the filename is not provided, set storage to NULL to indicate that
// the delay rendering will be used.
// TODO(dcheng): Is it actually possible for filename to be empty here? I
// think we always synthesize one in WebContentsDragWin.
STGMEDIUM* storage = NULL;
if (!download.filename.empty())
storage = GetStorageForFileName(download.filename);
// Add CF_HDROP.
DataObjectImpl::StoredDataInfo* info = new DataObjectImpl::StoredDataInfo(
Clipboard::GetCFHDropFormatType().ToFormatEtc(), storage);
info->downloader = download.downloader;
data_->contents_.push_back(info);
// Adding a download file always enables async mode.
data_->SetAsyncMode(VARIANT_TRUE);
}
void OSExchangeDataProviderWin::SetDragImage(
const gfx::ImageSkia& image,
const gfx::Vector2d& cursor_offset) {
drag_image_ = image;
drag_image_offset_ = cursor_offset;
}
const gfx::ImageSkia& OSExchangeDataProviderWin::GetDragImage() const {
return drag_image_;
}
const gfx::Vector2d& OSExchangeDataProviderWin::GetDragImageOffset() const {
return drag_image_offset_;
}
///////////////////////////////////////////////////////////////////////////////
// DataObjectImpl, IDataObject implementation:
// The following function, DuplicateMedium, is derived from WCDataObject.cpp
// in the WebKit source code. This is the license information for the file:
/*
* Copyright (C) 2007 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
static void DuplicateMedium(CLIPFORMAT source_clipformat,
STGMEDIUM* source,
STGMEDIUM* destination) {
switch (source->tymed) {
case TYMED_HGLOBAL:
destination->hGlobal =
static_cast<HGLOBAL>(OleDuplicateData(
source->hGlobal, source_clipformat, 0));
break;
case TYMED_MFPICT:
destination->hMetaFilePict =
static_cast<HMETAFILEPICT>(OleDuplicateData(
source->hMetaFilePict, source_clipformat, 0));
break;
case TYMED_GDI:
destination->hBitmap =
static_cast<HBITMAP>(OleDuplicateData(
source->hBitmap, source_clipformat, 0));
break;
case TYMED_ENHMF:
destination->hEnhMetaFile =
static_cast<HENHMETAFILE>(OleDuplicateData(
source->hEnhMetaFile, source_clipformat, 0));
break;
case TYMED_FILE:
destination->lpszFileName =
static_cast<LPOLESTR>(OleDuplicateData(
source->lpszFileName, source_clipformat, 0));
break;
case TYMED_ISTREAM:
destination->pstm = source->pstm;
destination->pstm->AddRef();
break;
case TYMED_ISTORAGE:
destination->pstg = source->pstg;
destination->pstg->AddRef();
break;
}
destination->tymed = source->tymed;
destination->pUnkForRelease = source->pUnkForRelease;
if (destination->pUnkForRelease)
destination->pUnkForRelease->AddRef();
}
DataObjectImpl::StoredDataInfo::StoredDataInfo(const FORMATETC& format_etc,
STGMEDIUM* medium)
: format_etc(format_etc), medium(medium), owns_medium(true) {
}
DataObjectImpl::StoredDataInfo::~StoredDataInfo() {
if (owns_medium) {
ReleaseStgMedium(medium);
delete medium;
}
if (downloader.get())
downloader->Stop();
}
DataObjectImpl::DataObjectImpl()
: is_aborting_(false),
in_drag_loop_(false),
in_async_mode_(false),
async_operation_started_(false),
observer_(NULL) {
}
DataObjectImpl::~DataObjectImpl() {
StopDownloads();
if (observer_)
observer_->OnDataObjectDisposed();
}
void DataObjectImpl::StopDownloads() {
for (StoredData::iterator iter = contents_.begin();
iter != contents_.end(); ++iter) {
if ((*iter)->downloader.get()) {
(*iter)->downloader->Stop();
(*iter)->downloader = 0;
}
}
}
void DataObjectImpl::RemoveData(const FORMATETC& format) {
if (format.ptd)
return; // Don't attempt to compare target devices.
for (StoredData::iterator i = contents_.begin(); i != contents_.end(); ++i) {
if (!(*i)->format_etc.ptd &&
format.cfFormat == (*i)->format_etc.cfFormat &&
format.dwAspect == (*i)->format_etc.dwAspect &&
format.lindex == (*i)->format_etc.lindex &&
format.tymed == (*i)->format_etc.tymed) {
contents_.erase(i);
return;
}
}
}
void DataObjectImpl::OnDownloadCompleted(const base::FilePath& file_path) {
DataObjectImpl::StoredData::iterator iter = contents_.begin();
for (; iter != contents_.end(); ++iter) {
if ((*iter)->format_etc.cfFormat == CF_HDROP) {
// Release the old storage.
if ((*iter)->owns_medium) {
ReleaseStgMedium((*iter)->medium);
delete (*iter)->medium;
}
// Update the storage.
(*iter)->owns_medium = true;
(*iter)->medium = GetStorageForFileName(file_path);
break;
}
}
DCHECK(iter != contents_.end());
}
void DataObjectImpl::OnDownloadAborted() {
}
HRESULT DataObjectImpl::GetData(FORMATETC* format_etc, STGMEDIUM* medium) {
if (is_aborting_)
return DV_E_FORMATETC;
StoredData::iterator iter = contents_.begin();
while (iter != contents_.end()) {
if ((*iter)->format_etc.cfFormat == format_etc->cfFormat &&
(*iter)->format_etc.lindex == format_etc->lindex &&
((*iter)->format_etc.tymed & format_etc->tymed)) {
// If medium is NULL, delay-rendering will be used.
if ((*iter)->medium) {
DuplicateMedium((*iter)->format_etc.cfFormat, (*iter)->medium, medium);
} else {
// Fail all GetData() attempts for DownloadURL data if the drag and drop
// operation is still in progress.
if (in_drag_loop_)
return DV_E_FORMATETC;
bool wait_for_data = false;
// In async mode, we do not want to start waiting for the data before
// the async operation is started. This is because we want to postpone
// until Shell kicks off a background thread to do the work so that
// we do not block the UI thread.
if (!in_async_mode_ || async_operation_started_)
wait_for_data = true;
if (!wait_for_data)
return DV_E_FORMATETC;
// Notify the observer we start waiting for the data. This gives
// an observer a chance to end the drag and drop.
if (observer_)
observer_->OnWaitForData();
// Now we can start the download.
if ((*iter)->downloader.get()) {
(*iter)->downloader->Start(this);
if (!(*iter)->downloader->Wait()) {
is_aborting_ = true;
return DV_E_FORMATETC;
}
}
// The stored data should have been updated with the final version.
// So we just need to call this function again to retrieve it.
return GetData(format_etc, medium);
}
return S_OK;
}
++iter;
}
return DV_E_FORMATETC;
}
HRESULT DataObjectImpl::GetDataHere(FORMATETC* format_etc,
STGMEDIUM* medium) {
return DATA_E_FORMATETC;
}
HRESULT DataObjectImpl::QueryGetData(FORMATETC* format_etc) {
StoredData::const_iterator iter = contents_.begin();
while (iter != contents_.end()) {
if ((*iter)->format_etc.cfFormat == format_etc->cfFormat)
return S_OK;
++iter;
}
return DV_E_FORMATETC;
}
HRESULT DataObjectImpl::GetCanonicalFormatEtc(
FORMATETC* format_etc, FORMATETC* result) {
format_etc->ptd = NULL;
return E_NOTIMPL;
}
HRESULT DataObjectImpl::SetData(
FORMATETC* format_etc, STGMEDIUM* medium, BOOL should_release) {
RemoveData(*format_etc);
STGMEDIUM* local_medium = new STGMEDIUM;
if (should_release) {
*local_medium = *medium;
} else {
DuplicateMedium(format_etc->cfFormat, medium, local_medium);
}
DataObjectImpl::StoredDataInfo* info =
new DataObjectImpl::StoredDataInfo(*format_etc, local_medium);
info->medium->tymed = format_etc->tymed;
info->owns_medium = !!should_release;
// Make newly added data appear first.
// TODO(dcheng): Make various setters agree whether elements should be
// prioritized from front to back or back to front.
contents_.insert(contents_.begin(), info);
return S_OK;
}
HRESULT DataObjectImpl::EnumFormatEtc(
DWORD direction, IEnumFORMATETC** enumerator) {
if (direction == DATADIR_GET) {
FormatEtcEnumerator* e =
new FormatEtcEnumerator(contents_.begin(), contents_.end());
e->AddRef();
*enumerator = e;
return S_OK;
}
return E_NOTIMPL;
}
HRESULT DataObjectImpl::DAdvise(
FORMATETC* format_etc, DWORD advf, IAdviseSink* sink, DWORD* connection) {
return OLE_E_ADVISENOTSUPPORTED;
}
HRESULT DataObjectImpl::DUnadvise(DWORD connection) {
return OLE_E_ADVISENOTSUPPORTED;
}
HRESULT DataObjectImpl::EnumDAdvise(IEnumSTATDATA** enumerator) {
return OLE_E_ADVISENOTSUPPORTED;
}
///////////////////////////////////////////////////////////////////////////////
// DataObjectImpl, IDataObjectAsyncCapability implementation:
HRESULT DataObjectImpl::EndOperation(
HRESULT result, IBindCtx* reserved, DWORD effects) {
async_operation_started_ = false;
return S_OK;
}
HRESULT DataObjectImpl::GetAsyncMode(BOOL* is_op_async) {
*is_op_async = in_async_mode_ ? VARIANT_TRUE : VARIANT_FALSE;
return S_OK;
}
HRESULT DataObjectImpl::InOperation(BOOL* in_async_op) {
*in_async_op = async_operation_started_ ? VARIANT_TRUE : VARIANT_FALSE;
return S_OK;
}
HRESULT DataObjectImpl::SetAsyncMode(BOOL do_op_async) {
in_async_mode_ = !!do_op_async;
return S_OK;
}
HRESULT DataObjectImpl::StartOperation(IBindCtx* reserved) {
async_operation_started_ = true;
return S_OK;
}
///////////////////////////////////////////////////////////////////////////////
// DataObjectImpl, IUnknown implementation:
HRESULT DataObjectImpl::QueryInterface(const IID& iid, void** object) {
if (!object)
return E_POINTER;
if (IsEqualIID(iid, IID_IDataObject) || IsEqualIID(iid, IID_IUnknown)) {
*object = static_cast<IDataObject*>(this);
} else if (in_async_mode_ &&
IsEqualIID(iid, __uuidof(IDataObjectAsyncCapability))) {
*object = static_cast<IDataObjectAsyncCapability*>(this);
} else {
*object = NULL;
return E_NOINTERFACE;
}
AddRef();
return S_OK;
}
ULONG DataObjectImpl::AddRef() {
base::RefCountedThreadSafe<DownloadFileObserver>::AddRef();
return 0;
}
ULONG DataObjectImpl::Release() {
base::RefCountedThreadSafe<DownloadFileObserver>::Release();
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// DataObjectImpl, private:
static STGMEDIUM* GetStorageForBytes(const void* data, size_t bytes) {
HANDLE handle = GlobalAlloc(GPTR, static_cast<int>(bytes));
if (handle) {
base::win::ScopedHGlobal<uint8_t*> scoped(handle);
memcpy(scoped.get(), data, bytes);
}
STGMEDIUM* storage = new STGMEDIUM;
storage->hGlobal = handle;
storage->tymed = TYMED_HGLOBAL;
storage->pUnkForRelease = NULL;
return storage;
}
template <typename T>
static STGMEDIUM* GetStorageForString(const std::basic_string<T>& data) {
return GetStorageForBytes(
data.c_str(),
(data.size() + 1) * sizeof(typename std::basic_string<T>::value_type));
}
static void GetInternetShortcutFileContents(const GURL& url,
std::string* data) {
DCHECK(data);
static const std::string kInternetShortcutFileStart =
"[InternetShortcut]\r\nURL=";
static const std::string kInternetShortcutFileEnd =
"\r\n";
*data = kInternetShortcutFileStart + url.spec() + kInternetShortcutFileEnd;
}
static void CreateValidFileNameFromTitle(const GURL& url,
const base::string16& title,
base::string16* validated) {
if (title.empty()) {
if (url.is_valid()) {
*validated = net::GetSuggestedFilename(url, "", "", "", "",
std::string());
} else {
// Nothing else can be done, just use a default.
*validated =
l10n_util::GetStringUTF16(IDS_APP_UNTITLED_SHORTCUT_FILE_NAME);
}
} else {
*validated = title;
base::i18n::ReplaceIllegalCharactersInPath(validated, '-');
}
static const wchar_t extension[] = L".url";
static const size_t max_length = MAX_PATH - arraysize(extension);
if (validated->size() > max_length)
validated->erase(max_length);
*validated += extension;
}
static STGMEDIUM* GetStorageForFileName(const base::FilePath& path) {
const size_t kDropSize = sizeof(DROPFILES);
const size_t kTotalBytes =
kDropSize + (path.value().length() + 2) * sizeof(wchar_t);
HANDLE hdata = GlobalAlloc(GMEM_MOVEABLE, kTotalBytes);
base::win::ScopedHGlobal<DROPFILES*> locked_mem(hdata);
DROPFILES* drop_files = locked_mem.get();
drop_files->pFiles = sizeof(DROPFILES);
drop_files->fWide = TRUE;
wchar_t* data = reinterpret_cast<wchar_t*>(
reinterpret_cast<BYTE*>(drop_files) + kDropSize);
const size_t copy_size = (path.value().length() + 1) * sizeof(wchar_t);
memcpy(data, path.value().c_str(), copy_size);
data[path.value().length() + 1] = L'\0'; // Double NULL
STGMEDIUM* storage = new STGMEDIUM;
storage->tymed = TYMED_HGLOBAL;
storage->hGlobal = hdata;
storage->pUnkForRelease = NULL;
return storage;
}
static LPITEMIDLIST PIDLNext(LPITEMIDLIST pidl) {
return reinterpret_cast<LPITEMIDLIST>(
reinterpret_cast<BYTE*>(pidl) + pidl->mkid.cb);
}
static size_t PIDLSize(LPITEMIDLIST pidl) {
size_t s = 0;
while (pidl->mkid.cb > 0) {
s += pidl->mkid.cb;
pidl = PIDLNext(pidl);
}
// We add 2 because an LPITEMIDLIST is terminated by two NULL bytes.
return 2 + s;
}
static LPITEMIDLIST GetNthPIDL(CIDA* cida, int n) {
return reinterpret_cast<LPITEMIDLIST>(
reinterpret_cast<LPBYTE>(cida) + cida->aoffset[n]);
}
static LPITEMIDLIST GetPidlFromPath(const base::FilePath& path) {
LPITEMIDLIST pidl = NULL;
LPSHELLFOLDER desktop_folder = NULL;
LPWSTR path_str = const_cast<LPWSTR>(path.value().c_str());
if (FAILED(SHGetDesktopFolder(&desktop_folder)))
return NULL;
HRESULT hr = desktop_folder->ParseDisplayName(
NULL, NULL, path_str, NULL, &pidl, NULL);
return SUCCEEDED(hr) ? pidl : NULL;
}
static STGMEDIUM* GetIDListStorageForFileName(const base::FilePath& path) {
LPITEMIDLIST pidl = GetPidlFromPath(path);
if (!pidl)
return NULL;
// When using CFSTR_SHELLIDLIST the hGlobal field of the STGMEDIUM is a
// pointer to a CIDA*. A CIDA is a variable length struct that contains a PIDL
// count (a UINT), an array of offsets of the following PIDLs (a UINT[]) and
// then a series of PIDLs laid out contiguously in memory. A PIDL is
// represented by an ITEMIDLIST struct, which contains a single SHITEMID.
// Despite only containing a single SHITEMID, ITEMIDLISTs are so-named because
// SHITEMIDs contain their own size and so given one, the next can be found by
// looking at the section of memory after it. The end of a list is indicated
// by two NULL bytes.
// Here we require two PIDLs - the first PIDL is the parent folder and is
// NULL here to indicate that the parent folder is the desktop, and the second
// is the PIDL of |path|.
const size_t kPIDLCountSize = sizeof(UINT);
const size_t kPIDLOffsetsSize = 2 * sizeof(UINT);
const size_t kFirstPIDLOffset = kPIDLCountSize + kPIDLOffsetsSize;
const size_t kFirstPIDLSize = 2; // Empty PIDL - 2 NULL bytes.
const size_t kSecondPIDLSize = PIDLSize(pidl);
const size_t kCIDASize = kFirstPIDLOffset + kFirstPIDLSize + kSecondPIDLSize;
HANDLE hdata = GlobalAlloc(GMEM_MOVEABLE, kCIDASize);
base::win::ScopedHGlobal<CIDA*> locked_mem(hdata);
CIDA* cida = locked_mem.get();
cida->cidl = 1; // We have one PIDL (not including the 0th root PIDL).
cida->aoffset[0] = kFirstPIDLOffset;
cida->aoffset[1] = kFirstPIDLOffset + kFirstPIDLSize;
LPITEMIDLIST idl = GetNthPIDL(cida, 0);
idl->mkid.cb = 0;
idl->mkid.abID[0] = 0;
idl = GetNthPIDL(cida, 1);
memcpy(idl, pidl, kSecondPIDLSize);
STGMEDIUM* storage = new STGMEDIUM;
storage->tymed = TYMED_HGLOBAL;
storage->hGlobal = hdata;
storage->pUnkForRelease = NULL;
return storage;
}
static STGMEDIUM* GetStorageForFileDescriptor(
const base::FilePath& path) {
base::string16 file_name = path.value();
DCHECK(!file_name.empty());
HANDLE hdata = GlobalAlloc(GPTR, sizeof(FILEGROUPDESCRIPTOR));
base::win::ScopedHGlobal<FILEGROUPDESCRIPTOR*> locked_mem(hdata);
FILEGROUPDESCRIPTOR* descriptor = locked_mem.get();
descriptor->cItems = 1;
descriptor->fgd[0].dwFlags = FD_LINKUI;
wcsncpy_s(descriptor->fgd[0].cFileName, MAX_PATH, file_name.c_str(),
std::min(file_name.size(), static_cast<size_t>(MAX_PATH - 1u)));
STGMEDIUM* storage = new STGMEDIUM;
storage->tymed = TYMED_HGLOBAL;
storage->hGlobal = hdata;
storage->pUnkForRelease = NULL;
return storage;
}
} // namespace ui