| // 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_util_win.h" |
| |
| #include <shellapi.h> |
| #include <wininet.h> // For INTERNET_MAX_URL_LENGTH. |
| #include <wrl/client.h> |
| #include <algorithm> |
| #include <limits> |
| #include <utility> |
| |
| #include "base/files/file_util.h" |
| #include "base/logging.h" |
| #include "base/stl_util.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/strings/sys_string_conversions.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/task/post_task.h" |
| #include "base/task/task_traits.h" |
| #include "base/task/thread_pool.h" |
| #include "base/threading/scoped_blocking_call.h" |
| #include "base/win/scoped_hglobal.h" |
| #include "base/win/shlwapi.h" |
| #include "net/base/filename_util.h" |
| #include "ui/base/clipboard/clipboard_format_type.h" |
| #include "ui/base/clipboard/custom_data_helper.h" |
| #include "url/gurl.h" |
| |
| namespace ui { |
| |
| namespace { |
| |
| bool HasData(IDataObject* data_object, const ClipboardFormatType& format) { |
| FORMATETC format_etc = format.ToFormatEtc(); |
| return SUCCEEDED(data_object->QueryGetData(&format_etc)); |
| } |
| |
| bool GetData(IDataObject* data_object, |
| const ClipboardFormatType& format, |
| STGMEDIUM* medium) { |
| FORMATETC format_etc = format.ToFormatEtc(); |
| return SUCCEEDED(data_object->GetData(&format_etc, medium)); |
| } |
| |
| bool GetUrlFromHDrop(IDataObject* data_object, |
| GURL* url, |
| base::string16* title) { |
| DCHECK(data_object && url && title); |
| |
| bool success = false; |
| STGMEDIUM medium; |
| if (!GetData(data_object, ClipboardFormatType::GetCFHDropType(), &medium)) |
| return false; |
| |
| { |
| base::win::ScopedHGlobal<HDROP> hdrop(medium.hGlobal); |
| |
| if (!hdrop.get()) |
| return false; |
| |
| wchar_t filename[MAX_PATH]; |
| if (DragQueryFileW(hdrop.get(), 0, filename, base::size(filename))) { |
| wchar_t url_buffer[INTERNET_MAX_URL_LENGTH]; |
| if (0 == _wcsicmp(PathFindExtensionW(filename), L".url") && |
| GetPrivateProfileStringW(L"InternetShortcut", L"url", 0, url_buffer, |
| base::size(url_buffer), filename)) { |
| *url = GURL(base::AsStringPiece16(url_buffer)); |
| PathRemoveExtension(filename); |
| title->assign(base::as_u16cstr(PathFindFileName(filename))); |
| success = url->is_valid(); |
| } |
| } |
| } |
| |
| ReleaseStgMedium(&medium); |
| return success; |
| } |
| |
| void SplitUrlAndTitle(const base::string16& str, |
| GURL* url, |
| base::string16* title) { |
| DCHECK(url && title); |
| size_t newline_pos = str.find('\n'); |
| if (newline_pos != base::string16::npos) { |
| *url = GURL(base::string16(str, 0, newline_pos)); |
| title->assign(str, newline_pos + 1, base::string16::npos); |
| } else { |
| *url = GURL(str); |
| title->assign(str); |
| } |
| } |
| |
| // Performs a case-insensitive search for a file path in a vector of existing |
| // filepaths. Case-insensivity is needed for file systems such as Windows where |
| // A.txt and a.txt are considered the same file name. |
| bool ContainsFilePathCaseInsensitive( |
| const std::vector<base::FilePath>& existing_filenames, |
| const base::FilePath& candidate_path) { |
| return std::find_if(std::begin(existing_filenames), |
| std::end(existing_filenames), |
| [&candidate_path](const base::FilePath& elem) { |
| return base::FilePath::CompareEqualIgnoreCase( |
| elem.value(), candidate_path.value()); |
| }) != std::end(existing_filenames); |
| } |
| |
| // Returns a unique display name for a virtual file, as it is possible that the |
| // filenames found in the file group descriptor are not unique (e.g. multiple |
| // emails with the same subject line are dragged out of Outlook.exe). |
| // |uniquifier| is incremented on encountering a non-unique file name. |
| base::FilePath GetUniqueVirtualFilename( |
| const std::wstring& candidate_name, |
| const std::vector<base::FilePath>& existing_filenames, |
| unsigned int* uniquifier) { |
| // Remove any possible filepath components/separators that drag source may |
| // have included in virtual file name. |
| base::FilePath unique_name = base::FilePath(candidate_name).BaseName(); |
| |
| // To mitigate against running up against MAX_PATH limitations (temp files |
| // failing to be created), truncate the display name. |
| const size_t kTruncatedDisplayNameLength = 128; |
| const std::wstring extension = unique_name.Extension(); |
| unique_name = unique_name.RemoveExtension(); |
| std::wstring truncated = unique_name.value(); |
| if (truncated.length() > kTruncatedDisplayNameLength) { |
| truncated.erase(kTruncatedDisplayNameLength); |
| unique_name = base::FilePath(truncated); |
| } |
| unique_name = unique_name.AddExtension(extension); |
| |
| // Replace any file name illegal characters. |
| unique_name = net::GenerateFileName(GURL(), std::string(), std::string(), |
| base::WideToUTF8(unique_name.value()), |
| std::string(), std::string()); |
| |
| // Make the file name unique. This is more involved than just marching through |
| // |existing_filenames|, finding the first match, uniquifying, then breaking |
| // out of the loop. For example, consider an array of candidate display names |
| // {"A (1) (2)", "A", "A (1) ", "A"}. In the first three iterations of the |
| // outer loop in GetVirtualFilenames, the candidate names are already unique |
| // and so simply pushed to the vector of |filenames|. On the fourth iteration |
| // of the outer loop and second iteration of the inner loop (that in |
| // GetUniqueVirtualFilename), the duplicate name is encountered and the fourth |
| // item is tentatively uniquified to "A (1)". If this inner loop were exited |
| // now, the final |filenames| would be {"A (1) (2)", "A", "A (1) ", "A (1)"} |
| // and would contain duplicate entries. So try not breaking out of the |
| // inner loop. In that case on the third iteration of the inner loop, the |
| // tentative unique name encounters another duplicate, so now gets uniquefied |
| // to "A (1) (2)" and if we then don't restart the loop, we would end up with |
| // the final |filenames| being {"A (1) (2)", "A", "A (1) ", "A (1) (2)"} and |
| // we still have duplicate entries. Instead we need to test against the |
| // entire collection of existing names on each uniquification attempt. |
| |
| // Same value used in base::GetUniquePathNumber. |
| static const int kMaxUniqueFiles = 100; |
| int count = 1; |
| for (; count <= kMaxUniqueFiles; ++count) { |
| if (!ContainsFilePathCaseInsensitive(existing_filenames, unique_name)) |
| break; |
| |
| unique_name = unique_name.InsertBeforeExtensionASCII( |
| base::StringPrintf(" (%d)", (*uniquifier)++)); |
| } |
| if (count > kMaxUniqueFiles) |
| unique_name = base::FilePath(); |
| |
| return unique_name; |
| } |
| |
| // Creates a uniquely-named temporary file based on the suggested filename, or |
| // an empty path on error. The file will be empty and all handles closed after |
| // this function returns. |
| base::FilePath CreateTemporaryFileWithSuggestedName( |
| const base::FilePath& suggested_name) { |
| base::FilePath temp_path1; |
| if (!base::CreateTemporaryFile(&temp_path1)) |
| return base::FilePath(); |
| |
| base::FilePath temp_path2 = temp_path1.DirName().Append(suggested_name); |
| |
| // Make filename unique. |
| temp_path2 = base::GetUniquePath(temp_path2); |
| if (temp_path2.empty()) |
| return base::FilePath(); // Failed to make a unique path. |
| |
| base::File::Error replace_file_error = base::File::FILE_OK; |
| if (!ReplaceFile(temp_path1, temp_path2, &replace_file_error)) |
| return base::FilePath(); |
| |
| return temp_path2; |
| } |
| |
| // This method performs file I/O and thus is executed on a worker thread. An |
| // empty FilePath for the temp file is returned on failure. |
| base::FilePath WriteFileContentsToTempFile(const base::FilePath& suggested_name, |
| HGLOBAL hdata) { |
| base::ScopedBlockingCall scoped_blocking_call(FROM_HERE, |
| base::BlockingType::MAY_BLOCK); |
| |
| if (!hdata) |
| return base::FilePath(); |
| |
| base::FilePath temp_path = |
| CreateTemporaryFileWithSuggestedName(suggested_name); |
| |
| if (!temp_path.empty()) { |
| base::win::ScopedHGlobal<char*> data(hdata); |
| // Don't write to the temp file for empty content--leave it at 0-bytes. |
| if (!(data.Size() == 1 && data.get()[0] == '\0')) { |
| if (base::WriteFile(temp_path, data.get(), data.Size()) < 0) { |
| base::DeleteFile(temp_path); |
| return base::FilePath(); |
| } |
| } |
| } |
| |
| ::GlobalFree(hdata); |
| |
| return temp_path; |
| } |
| |
| std::vector< |
| std::pair</*temp path*/ base::FilePath, /*display name*/ base::FilePath>> |
| WriteAllFileContentsToTempFiles( |
| const std::vector<base::FilePath>& display_names, |
| const std::vector<HGLOBAL>& memory_backed_contents) { |
| DCHECK_EQ(display_names.size(), memory_backed_contents.size()); |
| |
| std::vector<std::pair<base::FilePath, base::FilePath>> filepaths_and_names; |
| for (size_t i = 0; i < display_names.size(); i++) { |
| base::FilePath temp_path = WriteFileContentsToTempFile( |
| display_names[i], memory_backed_contents[i]); |
| |
| filepaths_and_names.push_back({temp_path, display_names[i]}); |
| } |
| |
| return filepaths_and_names; |
| } |
| |
| // Caller's responsibility to call GlobalFree on returned HGLOBAL when done with |
| // the data. This method must be performed on main thread as it is using the |
| // IDataObject marshalled there. |
| HGLOBAL CopyFileContentsToHGlobal(IDataObject* data_object, LONG index) { |
| DCHECK(data_object); |
| HGLOBAL hdata = nullptr; |
| |
| if (!HasData(data_object, |
| ClipboardFormatType::GetFileContentAtIndexType(index))) |
| return hdata; |
| |
| STGMEDIUM content; |
| if (!GetData(data_object, |
| ClipboardFormatType::GetFileContentAtIndexType(index), &content)) |
| return hdata; |
| |
| HRESULT hr = S_OK; |
| |
| if (content.tymed == TYMED_ISTORAGE) { |
| // For example, messages dragged out of Outlook.exe. |
| |
| Microsoft::WRL::ComPtr<ILockBytes> lock_bytes; |
| hr = ::CreateILockBytesOnHGlobal(nullptr, /* fDeleteOnRelease*/ FALSE, |
| &lock_bytes); |
| |
| Microsoft::WRL::ComPtr<IStorage> storage; |
| if (SUCCEEDED(hr)) { |
| hr = ::StgCreateDocfileOnILockBytes( |
| lock_bytes.Get(), STGM_READWRITE | STGM_SHARE_EXCLUSIVE | STGM_CREATE, |
| 0, &storage); |
| } |
| |
| if (SUCCEEDED(hr)) |
| hr = content.pstg->CopyTo(0, nullptr, nullptr, storage.Get()); |
| |
| if (SUCCEEDED(hr)) |
| hr = storage->Commit(STGC_OVERWRITE); |
| |
| if (SUCCEEDED(hr)) |
| hr = ::GetHGlobalFromILockBytes(lock_bytes.Get(), &hdata); |
| |
| if (FAILED(hr)) |
| hdata = nullptr; |
| } else if (content.tymed == TYMED_ISTREAM) { |
| // For example, attachments dragged out of messages in Outlook.exe. |
| |
| Microsoft::WRL::ComPtr<IStream> stream; |
| hr = |
| ::CreateStreamOnHGlobal(nullptr, /* fDeleteOnRelease */ FALSE, &stream); |
| if (SUCCEEDED(hr)) { |
| // A properly implemented IDataObject::GetData moves the stream pointer to |
| // the end. Need to seek to the beginning before copying the data then |
| // seek back to the original position. |
| const LARGE_INTEGER zero_displacement = {}; |
| ULARGE_INTEGER original_position = {}; |
| // Obtain the original stream pointer position. If the stream doesn't |
| // support seek, will still attempt to copy the data unless the failure is |
| // due to access being denied (enterprise protected data e.g.). |
| HRESULT hr_seek = content.pstm->Seek(zero_displacement, STREAM_SEEK_CUR, |
| &original_position); |
| if (hr_seek != E_ACCESSDENIED) { |
| if (SUCCEEDED(hr_seek)) { |
| // Seek to the beginning. |
| hr_seek = |
| content.pstm->Seek(zero_displacement, STREAM_SEEK_SET, nullptr); |
| } |
| |
| // Copy all data to the file stream. |
| ULARGE_INTEGER max_bytes; |
| max_bytes.QuadPart = std::numeric_limits<uint64_t>::max(); |
| hr = content.pstm->CopyTo(stream.Get(), max_bytes, nullptr, nullptr); |
| |
| if (SUCCEEDED(hr_seek)) { |
| // Restore the stream pointer to its original position. |
| LARGE_INTEGER original_offset; |
| original_offset.QuadPart = original_position.QuadPart; |
| content.pstm->Seek(original_offset, STREAM_SEEK_SET, nullptr); |
| } |
| } else { |
| // Access was denied. |
| hr = hr_seek; |
| } |
| |
| if (SUCCEEDED(hr)) |
| hr = ::GetHGlobalFromStream(stream.Get(), &hdata); |
| |
| if (FAILED(hr)) |
| hdata = nullptr; |
| } |
| } else if (content.tymed == TYMED_HGLOBAL) { |
| // For example, anchor (internet shortcut) dragged out of Spartan Edge. |
| // Copy the data as it will be written to a file on a worker thread and we |
| // need to call ReleaseStgMedium to free the memory allocated by the drag |
| // source. |
| base::win::ScopedHGlobal<char*> data_source(content.hGlobal); |
| hdata = ::GlobalAlloc(GHND, data_source.Size()); |
| if (hdata) { |
| base::win::ScopedHGlobal<char*> data_destination(hdata); |
| memcpy(data_destination.get(), data_source.get(), data_source.Size()); |
| } |
| } |
| |
| // Safe to release the medium now since all the data has been copied. |
| ReleaseStgMedium(&content); |
| |
| return hdata; |
| } |
| |
| std::wstring ConvertString(const char* string) { |
| return base::UTF8ToWide(string); |
| } |
| |
| std::wstring ConvertString(const wchar_t* string) { |
| return string; |
| } |
| |
| template <typename FileGroupDescriptorType> |
| struct FileGroupDescriptorData; |
| |
| template <> |
| struct FileGroupDescriptorData<FILEGROUPDESCRIPTORW> { |
| static bool get(IDataObject* data_object, STGMEDIUM* medium) { |
| return GetData(data_object, ClipboardFormatType::GetFileDescriptorType(), |
| medium); |
| } |
| }; |
| |
| template <> |
| struct FileGroupDescriptorData<FILEGROUPDESCRIPTORA> { |
| static bool get(IDataObject* data_object, STGMEDIUM* medium) { |
| return GetData(data_object, ClipboardFormatType::GetFileDescriptorAType(), |
| medium); |
| } |
| }; |
| |
| // Retrieves display names of virtual files, making sure they are unique. |
| // Use template parameter of FILEGROUPDESCRIPTORW for retrieving Unicode data |
| // and FILEGROUPDESCRIPTORA for ascii. |
| template <typename FileGroupDescriptorType> |
| bool GetVirtualFilenames(IDataObject* data_object, |
| std::vector<base::FilePath>* filenames) { |
| STGMEDIUM medium; |
| |
| if (!FileGroupDescriptorData<FileGroupDescriptorType>::get(data_object, |
| &medium)) |
| return false; |
| |
| { |
| base::win::ScopedHGlobal<FileGroupDescriptorType*> fgd(medium.hGlobal); |
| if (!fgd.get()) |
| return false; |
| |
| unsigned int num_files = fgd->cItems; |
| // We expect there to be at least one file in here. |
| DCHECK_GE(num_files, 1u); |
| |
| // Value to be incremented to ensure a unique display name, as it is |
| // possible that the filenames found in the file group descriptor are not |
| // unique (e.g. multiple emails with the same subject line are dragged out |
| // of Outlook.exe). |
| unsigned int uniquifier = 1; |
| |
| for (size_t i = 0; i < num_files; i++) { |
| // Folder entries not currently supported--skip this item. |
| if ((fgd->fgd[i].dwFlags & FD_ATTRIBUTES) && |
| (fgd->fgd[i].dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) { |
| DLOG(WARNING) << "GetVirtualFilenames: display name '" |
| << ConvertString(fgd->fgd[i].cFileName) |
| << "' refers to a directory (not supported)."; |
| continue; |
| } |
| base::FilePath display_name = GetUniqueVirtualFilename( |
| ConvertString(fgd->fgd[i].cFileName), *filenames, &uniquifier); |
| |
| filenames->push_back(display_name); |
| } |
| } |
| |
| ReleaseStgMedium(&medium); |
| return !filenames->empty(); |
| } |
| |
| template <typename FileGroupDescriptorType> |
| bool GetFileNameFromFirstDescriptor(IDataObject* data_object, |
| std::wstring* filename) { |
| STGMEDIUM medium; |
| |
| if (!FileGroupDescriptorData<FileGroupDescriptorType>::get(data_object, |
| &medium)) |
| return false; |
| |
| { |
| base::win::ScopedHGlobal<FileGroupDescriptorType*> fgd(medium.hGlobal); |
| // We expect there to be at least one file in here. |
| DCHECK_GE(fgd->cItems, 1u); |
| filename->assign(ConvertString(fgd->fgd[0].cFileName)); |
| } |
| ReleaseStgMedium(&medium); |
| return true; |
| } |
| |
| } // namespace |
| |
| bool ClipboardUtil::HasUrl(IDataObject* data_object, bool convert_filenames) { |
| DCHECK(data_object); |
| return HasData(data_object, ClipboardFormatType::GetMozUrlType()) || |
| HasData(data_object, ClipboardFormatType::GetUrlType()) || |
| HasData(data_object, ClipboardFormatType::GetUrlAType()) || |
| (convert_filenames && HasFilenames(data_object)); |
| } |
| |
| bool ClipboardUtil::HasFilenames(IDataObject* data_object) { |
| DCHECK(data_object); |
| return HasData(data_object, ClipboardFormatType::GetCFHDropType()) || |
| HasData(data_object, ClipboardFormatType::GetFilenameType()) || |
| HasData(data_object, ClipboardFormatType::GetFilenameAType()); |
| } |
| |
| bool ClipboardUtil::HasVirtualFilenames(IDataObject* data_object) { |
| DCHECK(data_object); |
| // Favor real files on the file system over virtual files. |
| return !HasFilenames(data_object) && |
| HasData(data_object, |
| ClipboardFormatType::GetFileContentAtIndexType(0)) && |
| (HasData(data_object, ClipboardFormatType::GetFileDescriptorType()) || |
| HasData(data_object, ClipboardFormatType::GetFileDescriptorAType())); |
| } |
| |
| bool ClipboardUtil::HasFileContents(IDataObject* data_object) { |
| DCHECK(data_object); |
| return HasData(data_object, ClipboardFormatType::GetFileContentZeroType()) && |
| (HasData(data_object, ClipboardFormatType::GetFileDescriptorType()) || |
| HasData(data_object, ClipboardFormatType::GetFileDescriptorAType())); |
| } |
| |
| bool ClipboardUtil::HasHtml(IDataObject* data_object) { |
| DCHECK(data_object); |
| return HasData(data_object, ClipboardFormatType::GetHtmlType()) || |
| HasData(data_object, ClipboardFormatType::GetTextHtmlType()); |
| } |
| |
| bool ClipboardUtil::HasPlainText(IDataObject* data_object) { |
| DCHECK(data_object); |
| return HasData(data_object, ClipboardFormatType::GetPlainTextType()) || |
| HasData(data_object, ClipboardFormatType::GetPlainTextAType()); |
| } |
| |
| bool ClipboardUtil::GetUrl(IDataObject* data_object, |
| GURL* url, |
| base::string16* title, |
| bool convert_filenames) { |
| DCHECK(data_object && url && title); |
| if (!HasUrl(data_object, convert_filenames)) |
| return false; |
| |
| // Try to extract a URL from |data_object| in a variety of formats. |
| STGMEDIUM store; |
| if (GetUrlFromHDrop(data_object, url, title)) |
| return true; |
| |
| if (GetData(data_object, ClipboardFormatType::GetMozUrlType(), &store) || |
| GetData(data_object, ClipboardFormatType::GetUrlType(), &store)) { |
| { |
| // Mozilla URL format or Unicode URL |
| base::win::ScopedHGlobal<wchar_t*> data(store.hGlobal); |
| SplitUrlAndTitle(base::WideToUTF16(data.get()), url, title); |
| } |
| ReleaseStgMedium(&store); |
| return url->is_valid(); |
| } |
| |
| if (GetData(data_object, ClipboardFormatType::GetUrlAType(), &store)) { |
| { |
| // URL using ASCII |
| base::win::ScopedHGlobal<char*> data(store.hGlobal); |
| SplitUrlAndTitle(base::UTF8ToUTF16(data.get()), url, title); |
| } |
| ReleaseStgMedium(&store); |
| return url->is_valid(); |
| } |
| |
| if (convert_filenames) { |
| std::vector<std::wstring> filenames; |
| if (!GetFilenames(data_object, &filenames)) |
| return false; |
| DCHECK_GT(filenames.size(), 0U); |
| *url = net::FilePathToFileURL(base::FilePath(filenames[0])); |
| return url->is_valid(); |
| } |
| |
| return false; |
| } |
| |
| bool ClipboardUtil::GetFilenames(IDataObject* data_object, |
| std::vector<std::wstring>* filenames) { |
| DCHECK(data_object && filenames); |
| if (!HasFilenames(data_object)) |
| return false; |
| |
| STGMEDIUM medium; |
| if (GetData(data_object, ClipboardFormatType::GetCFHDropType(), &medium)) { |
| { |
| base::win::ScopedHGlobal<HDROP> hdrop(medium.hGlobal); |
| if (!hdrop.get()) |
| return false; |
| |
| const int kMaxFilenameLen = 4096; |
| const unsigned num_files = DragQueryFileW(hdrop.get(), 0xffffffff, 0, 0); |
| for (unsigned int i = 0; i < num_files; ++i) { |
| wchar_t filename[kMaxFilenameLen]; |
| if (!DragQueryFileW(hdrop.get(), i, filename, kMaxFilenameLen)) |
| continue; |
| filenames->push_back(filename); |
| } |
| } |
| ReleaseStgMedium(&medium); |
| return !filenames->empty(); |
| } |
| |
| if (GetData(data_object, ClipboardFormatType::GetFilenameType(), &medium)) { |
| { |
| // filename using Unicode |
| base::win::ScopedHGlobal<wchar_t*> data(medium.hGlobal); |
| if (data.get() && data.get()[0]) |
| filenames->push_back(data.get()); |
| } |
| ReleaseStgMedium(&medium); |
| return true; |
| } |
| |
| if (GetData(data_object, ClipboardFormatType::GetFilenameAType(), &medium)) { |
| { |
| // filename using ASCII |
| base::win::ScopedHGlobal<char*> data(medium.hGlobal); |
| if (data.get() && data.get()[0]) |
| filenames->push_back(base::SysNativeMBToWide(data.get())); |
| } |
| ReleaseStgMedium(&medium); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| bool ClipboardUtil::GetVirtualFilenames( |
| IDataObject* data_object, |
| std::vector<base::FilePath>* filenames) { |
| DCHECK(data_object && filenames); |
| if (!HasVirtualFilenames(data_object)) |
| return false; |
| |
| // Nothing prevents the drag source app from using the CFSTR_FILEDESCRIPTORA |
| // ANSI format (e.g., it could be that it doesn't support Unicode). So need to |
| // check for both the ANSI and Unicode file group descriptors. |
| if (ui::GetVirtualFilenames<FILEGROUPDESCRIPTORW>(data_object, filenames)) { |
| // file group descriptor using Unicode. |
| return true; |
| } |
| |
| if (ui::GetVirtualFilenames<FILEGROUPDESCRIPTORA>(data_object, filenames)) { |
| // file group descriptor using ascii. |
| return true; |
| } |
| |
| return false; |
| } |
| |
| bool ClipboardUtil::GetVirtualFilesAsTempFiles( |
| IDataObject* data_object, |
| base::OnceCallback< |
| void(const std::vector<std::pair</*temp path*/ base::FilePath, |
| /*display name*/ base::FilePath>>&)> |
| callback) { |
| // Retrieve the display names of the virtual files. |
| std::vector<base::FilePath> display_names; |
| if (!GetVirtualFilenames(data_object, &display_names)) |
| return false; |
| |
| // Write the file contents to global memory. |
| std::vector<HGLOBAL> memory_backed_contents; |
| for (size_t i = 0; i < display_names.size(); i++) { |
| HGLOBAL hdata = CopyFileContentsToHGlobal(data_object, i); |
| memory_backed_contents.push_back(hdata); |
| } |
| |
| // Queue a task to actually write the temp files on a worker thread. |
| base::ThreadPool::PostTaskAndReplyWithResult( |
| FROM_HERE, {base::MayBlock(), base::TaskPriority::USER_BLOCKING}, |
| base::BindOnce(&WriteAllFileContentsToTempFiles, display_names, |
| memory_backed_contents), |
| std::move(callback)); // callback on the UI thread |
| |
| return true; |
| } |
| |
| bool ClipboardUtil::GetPlainText(IDataObject* data_object, |
| base::string16* plain_text) { |
| DCHECK(data_object && plain_text); |
| if (!HasPlainText(data_object)) |
| return false; |
| |
| STGMEDIUM store; |
| if (GetData(data_object, ClipboardFormatType::GetPlainTextType(), &store)) { |
| { |
| // Unicode text |
| base::win::ScopedHGlobal<wchar_t*> data(store.hGlobal); |
| plain_text->assign(base::as_u16cstr(data.get())); |
| } |
| ReleaseStgMedium(&store); |
| return true; |
| } |
| |
| if (GetData(data_object, ClipboardFormatType::GetPlainTextAType(), &store)) { |
| { |
| // ASCII text |
| base::win::ScopedHGlobal<char*> data(store.hGlobal); |
| plain_text->assign(base::UTF8ToUTF16(data.get())); |
| } |
| ReleaseStgMedium(&store); |
| return true; |
| } |
| |
| // If a file is dropped on the window, it does not provide either of the |
| // plain text formats, so here we try to forcibly get a url. |
| GURL url; |
| base::string16 title; |
| if (GetUrl(data_object, &url, &title, false)) { |
| *plain_text = base::UTF8ToUTF16(url.spec()); |
| return true; |
| } |
| return false; |
| } |
| |
| bool ClipboardUtil::GetHtml(IDataObject* data_object, |
| base::string16* html, std::string* base_url) { |
| DCHECK(data_object && html && base_url); |
| |
| STGMEDIUM store; |
| if (HasData(data_object, ClipboardFormatType::GetHtmlType()) && |
| GetData(data_object, ClipboardFormatType::GetHtmlType(), &store)) { |
| { |
| // MS CF html |
| base::win::ScopedHGlobal<char*> data(store.hGlobal); |
| |
| std::string html_utf8; |
| CFHtmlToHtml(std::string(data.get(), data.Size()), &html_utf8, base_url); |
| html->assign(base::UTF8ToUTF16(html_utf8)); |
| } |
| ReleaseStgMedium(&store); |
| return true; |
| } |
| |
| if (!HasData(data_object, ClipboardFormatType::GetTextHtmlType())) |
| return false; |
| |
| if (!GetData(data_object, ClipboardFormatType::GetTextHtmlType(), &store)) |
| return false; |
| |
| { |
| // text/html |
| base::win::ScopedHGlobal<wchar_t*> data(store.hGlobal); |
| html->assign(base::as_u16cstr(data.get())); |
| } |
| ReleaseStgMedium(&store); |
| return true; |
| } |
| |
| bool ClipboardUtil::GetFileContents(IDataObject* data_object, |
| std::wstring* filename, |
| std::string* file_contents) { |
| DCHECK(data_object && filename && file_contents); |
| if (!HasFileContents(data_object)) |
| return false; |
| |
| STGMEDIUM content; |
| // The call to GetData can be very slow depending on what is in |
| // |data_object|. |
| if (GetData(data_object, ClipboardFormatType::GetFileContentZeroType(), |
| &content)) { |
| if (TYMED_HGLOBAL == content.tymed) { |
| base::win::ScopedHGlobal<char*> data(content.hGlobal); |
| file_contents->assign(data.get(), data.Size()); |
| } |
| ReleaseStgMedium(&content); |
| } |
| |
| // Nothing prevents the drag source app from using the CFSTR_FILEDESCRIPTORA |
| // ANSI format (e.g., it could be that it doesn't support Unicode). So need to |
| // check for both the ANSI and Unicode file group descriptors. |
| if (GetFileNameFromFirstDescriptor<FILEGROUPDESCRIPTORW>(data_object, |
| filename)) { |
| // file group descriptor using Unicode. |
| return true; |
| } |
| |
| if (GetFileNameFromFirstDescriptor<FILEGROUPDESCRIPTORA>(data_object, |
| filename)) { |
| // file group descriptor using ASCII. |
| return true; |
| } |
| |
| return false; |
| } |
| |
| bool ClipboardUtil::GetWebCustomData( |
| IDataObject* data_object, |
| std::unordered_map<base::string16, base::string16>* custom_data) { |
| DCHECK(data_object && custom_data); |
| |
| if (!HasData(data_object, ClipboardFormatType::GetWebCustomDataType())) |
| return false; |
| |
| STGMEDIUM store; |
| if (GetData(data_object, ClipboardFormatType::GetWebCustomDataType(), |
| &store)) { |
| { |
| base::win::ScopedHGlobal<char*> data(store.hGlobal); |
| ReadCustomDataIntoMap(data.get(), data.Size(), custom_data); |
| } |
| ReleaseStgMedium(&store); |
| return true; |
| } |
| return false; |
| } |
| |
| |
| // HtmlToCFHtml and CFHtmlToHtml are based on similar methods in |
| // WebCore/platform/win/ClipboardUtilitiesWin.cpp. |
| /* |
| * Copyright (C) 2007, 2008 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. |
| */ |
| |
| // Helper method for converting from text/html to MS CF_HTML. |
| // Documentation for the CF_HTML format is available at |
| // http://msdn.microsoft.com/en-us/library/aa767917(VS.85).aspx |
| std::string ClipboardUtil::HtmlToCFHtml(const std::string& html, |
| const std::string& base_url) { |
| if (html.empty()) |
| return std::string(); |
| |
| #define MAX_DIGITS 10 |
| #define MAKE_NUMBER_FORMAT_1(digits) MAKE_NUMBER_FORMAT_2(digits) |
| #define MAKE_NUMBER_FORMAT_2(digits) "%0" #digits "u" |
| #define NUMBER_FORMAT MAKE_NUMBER_FORMAT_1(MAX_DIGITS) |
| |
| static const char* header = "Version:0.9\r\n" |
| "StartHTML:" NUMBER_FORMAT "\r\n" |
| "EndHTML:" NUMBER_FORMAT "\r\n" |
| "StartFragment:" NUMBER_FORMAT "\r\n" |
| "EndFragment:" NUMBER_FORMAT "\r\n"; |
| static const char* source_url_prefix = "SourceURL:"; |
| |
| static const char* start_markup = |
| "<html>\r\n<body>\r\n<!--StartFragment-->"; |
| static const char* end_markup = |
| "<!--EndFragment-->\r\n</body>\r\n</html>"; |
| |
| // Calculate offsets |
| size_t start_html_offset = strlen(header) - strlen(NUMBER_FORMAT) * 4 + |
| MAX_DIGITS * 4; |
| if (!base_url.empty()) { |
| start_html_offset += strlen(source_url_prefix) + |
| base_url.length() + 2; // Add 2 for \r\n. |
| } |
| size_t start_fragment_offset = start_html_offset + strlen(start_markup); |
| size_t end_fragment_offset = start_fragment_offset + html.length(); |
| size_t end_html_offset = end_fragment_offset + strlen(end_markup); |
| |
| std::string result = base::StringPrintf(header, |
| start_html_offset, |
| end_html_offset, |
| start_fragment_offset, |
| end_fragment_offset); |
| if (!base_url.empty()) { |
| result += source_url_prefix; |
| result += base_url; |
| result += "\r\n"; |
| } |
| result += start_markup; |
| result += html; |
| result += end_markup; |
| |
| #undef MAX_DIGITS |
| #undef MAKE_NUMBER_FORMAT_1 |
| #undef MAKE_NUMBER_FORMAT_2 |
| #undef NUMBER_FORMAT |
| |
| return result; |
| } |
| |
| // Helper method for converting from MS CF_HTML to text/html. |
| void ClipboardUtil::CFHtmlToHtml(const std::string& cf_html, |
| std::string* html, |
| std::string* base_url) { |
| size_t fragment_start = std::string::npos; |
| size_t fragment_end = std::string::npos; |
| |
| ClipboardUtil::CFHtmlExtractMetadata(cf_html, base_url, nullptr, |
| &fragment_start, &fragment_end); |
| |
| if (html && |
| fragment_start != std::string::npos && |
| fragment_end != std::string::npos) { |
| *html = cf_html.substr(fragment_start, fragment_end - fragment_start); |
| base::TrimWhitespaceASCII(*html, base::TRIM_ALL, html); |
| } |
| } |
| |
| void ClipboardUtil::CFHtmlExtractMetadata(const std::string& cf_html, |
| std::string* base_url, |
| size_t* html_start, |
| size_t* fragment_start, |
| size_t* fragment_end) { |
| // Obtain base_url if present. |
| if (base_url) { |
| static constexpr char kSrcUrlStr[] = "SourceURL:"; |
| size_t line_start = cf_html.find(kSrcUrlStr); |
| if (line_start != std::string::npos) { |
| size_t src_end = cf_html.find("\n", line_start); |
| size_t src_start = line_start + strlen(kSrcUrlStr); |
| if (src_end != std::string::npos && src_start != std::string::npos) { |
| *base_url = cf_html.substr(src_start, src_end - src_start); |
| base::TrimWhitespaceASCII(*base_url, base::TRIM_ALL, base_url); |
| } |
| } |
| } |
| |
| // Find the markup between "<!--StartFragment-->" and "<!--EndFragment-->". |
| // If the comments cannot be found, like copying from OpenOffice Writer, |
| // we simply fall back to using StartFragment/EndFragment bytecount values |
| // to determine the fragment indexes. |
| std::string cf_html_lower = base::ToLowerASCII(cf_html); |
| size_t markup_start = cf_html_lower.find("<html", 0); |
| if (html_start) { |
| *html_start = markup_start; |
| } |
| size_t tag_start = cf_html.find("<!--StartFragment", markup_start); |
| if (tag_start == std::string::npos) { |
| static constexpr char kStartFragmentStr[] = "StartFragment:"; |
| size_t start_fragment_start = cf_html.find(kStartFragmentStr); |
| if (start_fragment_start != std::string::npos) { |
| *fragment_start = static_cast<size_t>(atoi( |
| cf_html.c_str() + start_fragment_start + strlen(kStartFragmentStr))); |
| } |
| |
| static constexpr char kEndFragmentStr[] = "EndFragment:"; |
| size_t end_fragment_start = cf_html.find(kEndFragmentStr); |
| if (end_fragment_start != std::string::npos) { |
| *fragment_end = static_cast<size_t>( |
| atoi(cf_html.c_str() + end_fragment_start + strlen(kEndFragmentStr))); |
| } |
| } else { |
| *fragment_start = cf_html.find('>', tag_start) + 1; |
| size_t tag_end = cf_html.rfind("<!--EndFragment", std::string::npos); |
| *fragment_end = cf_html.rfind('<', tag_end); |
| } |
| } |
| |
| } // namespace ui |
