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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "content/browser/tab_contents/web_contents_drag_win.h" | |
| 6 | |
| 7 #include <windows.h> | |
| 8 | |
| 9 #include <string> | |
| 10 | |
| 11 #include "base/bind.h" | |
| 12 #include "base/file_path.h" | |
| 13 #include "base/message_loop.h" | |
| 14 #include "base/pickle.h" | |
| 15 #include "base/threading/platform_thread.h" | |
| 16 #include "base/threading/thread.h" | |
| 17 #include "base/utf_string_conversions.h" | |
| 18 #include "content/browser/download/drag_download_file.h" | |
| 19 #include "content/browser/download/drag_download_util.h" | |
| 20 #include "content/browser/web_contents/web_drag_dest_win.h" | |
| 21 #include "content/browser/web_contents/web_drag_source_win.h" | |
| 22 #include "content/browser/web_contents/web_drag_utils_win.h" | |
| 23 #include "content/public/browser/browser_thread.h" | |
| 24 #include "content/public/browser/content_browser_client.h" | |
| 25 #include "content/public/browser/web_contents.h" | |
| 26 #include "content/public/browser/web_drag_dest_delegate.h" | |
| 27 #include "net/base/net_util.h" | |
| 28 #include "ui/base/clipboard/clipboard_util_win.h" | |
| 29 #include "ui/base/clipboard/custom_data_helper.h" | |
| 30 #include "ui/base/dragdrop/drag_utils.h" | |
| 31 #include "ui/gfx/size.h" | |
| 32 #include "webkit/glue/webdropdata.h" | |
| 33 | |
| 34 using content::BrowserThread; | |
| 35 using WebKit::WebDragOperationsMask; | |
| 36 using WebKit::WebDragOperationCopy; | |
| 37 using WebKit::WebDragOperationLink; | |
| 38 using WebKit::WebDragOperationMove; | |
| 39 | |
| 40 namespace { | |
| 41 | |
| 42 HHOOK msg_hook = NULL; | |
| 43 DWORD drag_out_thread_id = 0; | |
| 44 bool mouse_up_received = false; | |
| 45 | |
| 46 LRESULT CALLBACK MsgFilterProc(int code, WPARAM wparam, LPARAM lparam) { | |
| 47 if (code == base::MessagePumpForUI::kMessageFilterCode && | |
| 48 !mouse_up_received) { | |
| 49 MSG* msg = reinterpret_cast<MSG*>(lparam); | |
| 50 // We do not care about WM_SYSKEYDOWN and WM_SYSKEYUP because when ALT key | |
| 51 // is pressed down on drag-and-drop, it means to create a link. | |
| 52 if (msg->message == WM_MOUSEMOVE || msg->message == WM_LBUTTONUP || | |
| 53 msg->message == WM_KEYDOWN || msg->message == WM_KEYUP) { | |
| 54 // Forward the message from the UI thread to the drag-and-drop thread. | |
| 55 PostThreadMessage(drag_out_thread_id, | |
| 56 msg->message, | |
| 57 msg->wParam, | |
| 58 msg->lParam); | |
| 59 | |
| 60 // If the left button is up, we do not need to forward the message any | |
| 61 // more. | |
| 62 if (msg->message == WM_LBUTTONUP || !(GetKeyState(VK_LBUTTON) & 0x8000)) | |
| 63 mouse_up_received = true; | |
| 64 | |
| 65 return TRUE; | |
| 66 } | |
| 67 } | |
| 68 return CallNextHookEx(msg_hook, code, wparam, lparam); | |
| 69 } | |
| 70 | |
| 71 } // namespace | |
| 72 | |
| 73 class DragDropThread : public base::Thread { | |
| 74 public: | |
| 75 explicit DragDropThread(WebContentsDragWin* drag_handler) | |
| 76 : base::Thread("Chrome_DragDropThread"), | |
| 77 drag_handler_(drag_handler) { | |
| 78 } | |
| 79 | |
| 80 virtual ~DragDropThread() { | |
| 81 Thread::Stop(); | |
| 82 } | |
| 83 | |
| 84 protected: | |
| 85 // base::Thread implementations: | |
| 86 virtual void Init() { | |
| 87 int ole_result = OleInitialize(NULL); | |
| 88 DCHECK(ole_result == S_OK); | |
| 89 } | |
| 90 | |
| 91 virtual void CleanUp() { | |
| 92 OleUninitialize(); | |
| 93 } | |
| 94 | |
| 95 private: | |
| 96 // Hold a reference count to WebContentsDragWin to make sure that it is always | |
| 97 // alive in the thread lifetime. | |
| 98 scoped_refptr<WebContentsDragWin> drag_handler_; | |
| 99 | |
| 100 DISALLOW_COPY_AND_ASSIGN(DragDropThread); | |
| 101 }; | |
| 102 | |
| 103 WebContentsDragWin::WebContentsDragWin( | |
| 104 gfx::NativeWindow source_window, | |
| 105 content::WebContents* web_contents, | |
| 106 WebDragDest* drag_dest, | |
| 107 const base::Callback<void()>& drag_end_callback) | |
| 108 : drag_drop_thread_id_(0), | |
| 109 source_window_(source_window), | |
| 110 web_contents_(web_contents), | |
| 111 drag_dest_(drag_dest), | |
| 112 drag_ended_(false), | |
| 113 old_drop_target_suspended_state_(false), | |
| 114 drag_end_callback_(drag_end_callback) { | |
| 115 } | |
| 116 | |
| 117 WebContentsDragWin::~WebContentsDragWin() { | |
| 118 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
| 119 DCHECK(!drag_drop_thread_.get()); | |
| 120 } | |
| 121 | |
| 122 void WebContentsDragWin::StartDragging(const WebDropData& drop_data, | |
| 123 WebDragOperationsMask ops, | |
| 124 const SkBitmap& image, | |
| 125 const gfx::Point& image_offset) { | |
| 126 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
| 127 | |
| 128 drag_source_ = new WebDragSource(source_window_, web_contents_); | |
| 129 | |
| 130 const GURL& page_url = web_contents_->GetURL(); | |
| 131 const std::string& page_encoding = web_contents_->GetEncoding(); | |
| 132 | |
| 133 // If it is not drag-out, do the drag-and-drop in the current UI thread. | |
| 134 if (drop_data.download_metadata.empty()) { | |
| 135 DoDragging(drop_data, ops, page_url, page_encoding, image, image_offset); | |
| 136 EndDragging(false); | |
| 137 return; | |
| 138 } | |
| 139 | |
| 140 // We do not want to drag and drop the download to itself. | |
| 141 old_drop_target_suspended_state_ = drag_dest_->suspended(); | |
| 142 drag_dest_->set_suspended(true); | |
| 143 | |
| 144 // Start a background thread to do the drag-and-drop. | |
| 145 DCHECK(!drag_drop_thread_.get()); | |
| 146 drag_drop_thread_.reset(new DragDropThread(this)); | |
| 147 base::Thread::Options options; | |
| 148 options.message_loop_type = MessageLoop::TYPE_UI; | |
| 149 if (drag_drop_thread_->StartWithOptions(options)) { | |
| 150 drag_drop_thread_->message_loop()->PostTask( | |
| 151 FROM_HERE, | |
| 152 base::Bind(&WebContentsDragWin::StartBackgroundDragging, this, | |
| 153 drop_data, ops, page_url, page_encoding, image, | |
| 154 image_offset)); | |
| 155 } | |
| 156 | |
| 157 // Install a hook procedure to monitor the messages so that we can forward | |
| 158 // the appropriate ones to the background thread. | |
| 159 drag_out_thread_id = drag_drop_thread_->thread_id(); | |
| 160 mouse_up_received = false; | |
| 161 DCHECK(!msg_hook); | |
| 162 msg_hook = SetWindowsHookEx(WH_MSGFILTER, | |
| 163 MsgFilterProc, | |
| 164 NULL, | |
| 165 GetCurrentThreadId()); | |
| 166 | |
| 167 // Attach the input state of the background thread to the UI thread so that | |
| 168 // SetCursor can work from the background thread. | |
| 169 AttachThreadInput(drag_out_thread_id, GetCurrentThreadId(), TRUE); | |
| 170 } | |
| 171 | |
| 172 void WebContentsDragWin::StartBackgroundDragging( | |
| 173 const WebDropData& drop_data, | |
| 174 WebDragOperationsMask ops, | |
| 175 const GURL& page_url, | |
| 176 const std::string& page_encoding, | |
| 177 const SkBitmap& image, | |
| 178 const gfx::Point& image_offset) { | |
| 179 drag_drop_thread_id_ = base::PlatformThread::CurrentId(); | |
| 180 | |
| 181 DoDragging(drop_data, ops, page_url, page_encoding, image, image_offset); | |
| 182 BrowserThread::PostTask( | |
| 183 BrowserThread::UI, | |
| 184 FROM_HERE, | |
| 185 base::Bind(&WebContentsDragWin::EndDragging, this, true)); | |
| 186 } | |
| 187 | |
| 188 void WebContentsDragWin::PrepareDragForDownload( | |
| 189 const WebDropData& drop_data, | |
| 190 ui::OSExchangeData* data, | |
| 191 const GURL& page_url, | |
| 192 const std::string& page_encoding) { | |
| 193 // Parse the download metadata. | |
| 194 string16 mime_type; | |
| 195 FilePath file_name; | |
| 196 GURL download_url; | |
| 197 if (!drag_download_util::ParseDownloadMetadata(drop_data.download_metadata, | |
| 198 &mime_type, | |
| 199 &file_name, | |
| 200 &download_url)) | |
| 201 return; | |
| 202 | |
| 203 // Generate the file name based on both mime type and proposed file name. | |
| 204 std::string default_name = | |
| 205 content::GetContentClient()->browser()->GetDefaultDownloadName(); | |
| 206 FilePath generated_download_file_name = | |
| 207 net::GenerateFileName(download_url, | |
| 208 std::string(), | |
| 209 std::string(), | |
| 210 UTF16ToUTF8(file_name.value()), | |
| 211 UTF16ToUTF8(mime_type), | |
| 212 default_name); | |
| 213 | |
| 214 // Provide the data as file (CF_HDROP). A temporary download file with the | |
| 215 // Zone.Identifier ADS (Alternate Data Stream) attached will be created. | |
| 216 linked_ptr<net::FileStream> empty_file_stream; | |
| 217 scoped_refptr<DragDownloadFile> download_file = | |
| 218 new DragDownloadFile(generated_download_file_name, | |
| 219 empty_file_stream, | |
| 220 download_url, | |
| 221 page_url, | |
| 222 page_encoding, | |
| 223 web_contents_); | |
| 224 ui::OSExchangeData::DownloadFileInfo file_download(FilePath(), | |
| 225 download_file.get()); | |
| 226 data->SetDownloadFileInfo(file_download); | |
| 227 | |
| 228 // Enable asynchronous operation. | |
| 229 ui::OSExchangeDataProviderWin::GetIAsyncOperation(*data)->SetAsyncMode(TRUE); | |
| 230 } | |
| 231 | |
| 232 void WebContentsDragWin::PrepareDragForFileContents( | |
| 233 const WebDropData& drop_data, ui::OSExchangeData* data) { | |
| 234 static const int kMaxFilenameLength = 255; // FAT and NTFS | |
| 235 FilePath file_name(drop_data.file_description_filename); | |
| 236 string16 extension = file_name.Extension(); | |
| 237 file_name = file_name.BaseName().RemoveExtension(); | |
| 238 // Images without ALT text will only have a file extension so we need to | |
| 239 // synthesize one from the provided extension and URL. | |
| 240 if (file_name.value().empty()) { | |
| 241 // Retrieve the name from the URL. | |
| 242 file_name = FilePath( | |
| 243 net::GetSuggestedFilename(drop_data.url, "", "", "", "", "")); | |
| 244 if (file_name.value().size() + extension.size() > kMaxFilenameLength) { | |
| 245 file_name = FilePath(file_name.value().substr( | |
| 246 0, kMaxFilenameLength - extension.size())); | |
| 247 } | |
| 248 } | |
| 249 file_name = file_name.ReplaceExtension(extension); | |
| 250 data->SetFileContents(file_name, drop_data.file_contents); | |
| 251 } | |
| 252 | |
| 253 void WebContentsDragWin::PrepareDragForUrl(const WebDropData& drop_data, | |
| 254 ui::OSExchangeData* data) { | |
| 255 if (drag_dest_->delegate()->AddDragData(drop_data, data)) | |
| 256 return; | |
| 257 | |
| 258 data->SetURL(drop_data.url, drop_data.url_title); | |
| 259 } | |
| 260 | |
| 261 void WebContentsDragWin::DoDragging(const WebDropData& drop_data, | |
| 262 WebDragOperationsMask ops, | |
| 263 const GURL& page_url, | |
| 264 const std::string& page_encoding, | |
| 265 const SkBitmap& image, | |
| 266 const gfx::Point& image_offset) { | |
| 267 ui::OSExchangeData data; | |
| 268 | |
| 269 // TODO(dcheng): Figure out why this is mutually exclusive. | |
| 270 if (!drop_data.download_metadata.empty()) { | |
| 271 PrepareDragForDownload(drop_data, &data, page_url, page_encoding); | |
| 272 | |
| 273 // Set the observer. | |
| 274 ui::OSExchangeDataProviderWin::GetDataObjectImpl(data)->set_observer(this); | |
| 275 } else { | |
| 276 // We set the file contents before the URL because the URL also sets file | |
| 277 // contents (to a .URL shortcut). We want to prefer file content data over | |
| 278 // a shortcut so we add it first. | |
| 279 if (!drop_data.file_contents.empty()) | |
| 280 PrepareDragForFileContents(drop_data, &data); | |
| 281 if (!drop_data.text_html.empty()) | |
| 282 data.SetHtml(drop_data.text_html, drop_data.html_base_url); | |
| 283 // We set the text contents before the URL because the URL also sets text | |
| 284 // content. | |
| 285 if (!drop_data.plain_text.empty()) | |
| 286 data.SetString(drop_data.plain_text); | |
| 287 if (drop_data.url.is_valid()) | |
| 288 PrepareDragForUrl(drop_data, &data); | |
| 289 if (!drop_data.custom_data.empty()) { | |
| 290 Pickle pickle; | |
| 291 ui::WriteCustomDataToPickle(drop_data.custom_data, &pickle); | |
| 292 data.SetPickledData(ui::ClipboardUtil::GetWebCustomDataFormat()->cfFormat, | |
| 293 pickle); | |
| 294 } | |
| 295 } | |
| 296 | |
| 297 // Set drag image. | |
| 298 if (!image.isNull()) { | |
| 299 drag_utils::SetDragImageOnDataObject( | |
| 300 image, gfx::Size(image.width(), image.height()), image_offset, &data); | |
| 301 } | |
| 302 | |
| 303 // We need to enable recursive tasks on the message loop so we can get | |
| 304 // updates while in the system DoDragDrop loop. | |
| 305 DWORD effect; | |
| 306 { | |
| 307 MessageLoop::ScopedNestableTaskAllower allow(MessageLoop::current()); | |
| 308 DoDragDrop(ui::OSExchangeDataProviderWin::GetIDataObject(data), | |
| 309 drag_source_, | |
| 310 web_drag_utils_win::WebDragOpMaskToWinDragOpMask(ops), | |
| 311 &effect); | |
| 312 } | |
| 313 | |
| 314 // This works because WebDragSource::OnDragSourceDrop uses PostTask to | |
| 315 // dispatch the actual event. | |
| 316 drag_source_->set_effect(effect); | |
| 317 } | |
| 318 | |
| 319 void WebContentsDragWin::EndDragging(bool restore_suspended_state) { | |
| 320 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
| 321 | |
| 322 if (drag_ended_) | |
| 323 return; | |
| 324 drag_ended_ = true; | |
| 325 | |
| 326 if (restore_suspended_state) | |
| 327 drag_dest_->set_suspended(old_drop_target_suspended_state_); | |
| 328 | |
| 329 if (msg_hook) { | |
| 330 AttachThreadInput(drag_out_thread_id, GetCurrentThreadId(), FALSE); | |
| 331 UnhookWindowsHookEx(msg_hook); | |
| 332 msg_hook = NULL; | |
| 333 } | |
| 334 | |
| 335 drag_end_callback_.Run(); | |
| 336 } | |
| 337 | |
| 338 void WebContentsDragWin::CancelDrag() { | |
| 339 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
| 340 | |
| 341 drag_source_->CancelDrag(); | |
| 342 } | |
| 343 | |
| 344 void WebContentsDragWin::CloseThread() { | |
| 345 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
| 346 | |
| 347 drag_drop_thread_.reset(); | |
| 348 } | |
| 349 | |
| 350 void WebContentsDragWin::OnWaitForData() { | |
| 351 DCHECK(drag_drop_thread_id_ == base::PlatformThread::CurrentId()); | |
| 352 | |
| 353 // When the left button is release and we start to wait for the data, end | |
| 354 // the dragging before DoDragDrop returns. This makes the page leave the drag | |
| 355 // mode so that it can start to process the normal input events. | |
| 356 BrowserThread::PostTask( | |
| 357 BrowserThread::UI, | |
| 358 FROM_HERE, | |
| 359 base::Bind(&WebContentsDragWin::EndDragging, this, true)); | |
| 360 } | |
| 361 | |
| 362 void WebContentsDragWin::OnDataObjectDisposed() { | |
| 363 DCHECK(drag_drop_thread_id_ == base::PlatformThread::CurrentId()); | |
| 364 | |
| 365 // The drag-and-drop thread is only closed after OLE is done with | |
| 366 // DataObjectImpl. | |
| 367 BrowserThread::PostTask( | |
| 368 BrowserThread::UI, | |
| 369 FROM_HERE, | |
| 370 base::Bind(&WebContentsDragWin::CloseThread, this)); | |
| 371 } | |
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Chromium Code Reviews
Issue 10024066:
TabContents -> WebContentsImpl, part 4. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src