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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_drag_source_gtk.h" | |
| 6 | |
| 7 #include <string> | |
| 8 | |
| 9 #include "base/file_util.h" | |
| 10 #include "base/nix/mime_util_xdg.h" | |
| 11 #include "base/threading/thread_restrictions.h" | |
| 12 #include "base/utf_string_conversions.h" | |
| 13 #include "content/browser/download/drag_download_file.h" | |
| 14 #include "content/browser/download/drag_download_util.h" | |
| 15 #include "content/browser/renderer_host/render_view_host_impl.h" | |
| 16 #include "content/browser/tab_contents/drag_utils_gtk.h" | |
| 17 #include "content/browser/tab_contents/tab_contents.h" | |
| 18 #include "content/public/browser/content_browser_client.h" | |
| 19 #include "content/public/browser/render_view_host_delegate.h" | |
| 20 #include "content/public/browser/web_contents_view.h" | |
| 21 #include "content/public/common/content_client.h" | |
| 22 #include "net/base/file_stream.h" | |
| 23 #include "net/base/net_util.h" | |
| 24 #include "third_party/skia/include/core/SkBitmap.h" | |
| 25 #include "ui/base/clipboard/custom_data_helper.h" | |
| 26 #include "ui/base/dragdrop/gtk_dnd_util.h" | |
| 27 #include "ui/base/gtk/gtk_compat.h" | |
| 28 #include "ui/base/gtk/gtk_screen_util.h" | |
| 29 #include "ui/gfx/gtk_util.h" | |
| 30 #include "webkit/glue/webdropdata.h" | |
| 31 | |
| 32 using content::RenderViewHostImpl; | |
| 33 using content::WebContents; | |
| 34 using WebKit::WebDragOperation; | |
| 35 using WebKit::WebDragOperationsMask; | |
| 36 using WebKit::WebDragOperationNone; | |
| 37 | |
| 38 namespace content { | |
| 39 | |
| 40 WebDragSourceGtk::WebDragSourceGtk(WebContents* web_contents) | |
| 41 : web_contents_(web_contents), | |
| 42 drag_pixbuf_(NULL), | |
| 43 drag_failed_(false), | |
| 44 drag_widget_(gtk_invisible_new()), | |
| 45 drag_context_(NULL), | |
| 46 drag_icon_(gtk_window_new(GTK_WINDOW_POPUP)) { | |
| 47 signals_.Connect(drag_widget_, "drag-failed", | |
| 48 G_CALLBACK(OnDragFailedThunk), this); | |
| 49 signals_.Connect(drag_widget_, "drag-begin", | |
| 50 G_CALLBACK(OnDragBeginThunk), | |
| 51 this); | |
| 52 signals_.Connect(drag_widget_, "drag-end", | |
| 53 G_CALLBACK(OnDragEndThunk), this); | |
| 54 signals_.Connect(drag_widget_, "drag-data-get", | |
| 55 G_CALLBACK(OnDragDataGetThunk), this); | |
| 56 | |
| 57 signals_.Connect(drag_icon_, "expose-event", | |
| 58 G_CALLBACK(OnDragIconExposeThunk), this); | |
| 59 } | |
| 60 | |
| 61 WebDragSourceGtk::~WebDragSourceGtk() { | |
| 62 // Break the current drag, if any. | |
| 63 if (drop_data_.get()) { | |
| 64 gtk_grab_add(drag_widget_); | |
| 65 gtk_grab_remove(drag_widget_); | |
| 66 MessageLoopForUI::current()->RemoveObserver(this); | |
| 67 drop_data_.reset(); | |
| 68 } | |
| 69 | |
| 70 gtk_widget_destroy(drag_widget_); | |
| 71 gtk_widget_destroy(drag_icon_); | |
| 72 } | |
| 73 | |
| 74 void WebDragSourceGtk::StartDragging(const WebDropData& drop_data, | |
| 75 WebDragOperationsMask allowed_ops, | |
| 76 GdkEventButton* last_mouse_down, | |
| 77 const SkBitmap& image, | |
| 78 const gfx::Point& image_offset) { | |
| 79 // Guard against re-starting before previous drag completed. | |
| 80 if (drag_context_) { | |
| 81 NOTREACHED(); | |
| 82 web_contents_->SystemDragEnded(); | |
| 83 return; | |
| 84 } | |
| 85 | |
| 86 int targets_mask = 0; | |
| 87 | |
| 88 if (!drop_data.plain_text.empty()) | |
| 89 targets_mask |= ui::TEXT_PLAIN; | |
| 90 if (drop_data.url.is_valid()) { | |
| 91 targets_mask |= ui::TEXT_URI_LIST; | |
| 92 targets_mask |= ui::CHROME_NAMED_URL; | |
| 93 targets_mask |= ui::NETSCAPE_URL; | |
| 94 } | |
| 95 if (!drop_data.text_html.empty()) | |
| 96 targets_mask |= ui::TEXT_HTML; | |
| 97 if (!drop_data.file_contents.empty()) | |
| 98 targets_mask |= ui::CHROME_WEBDROP_FILE_CONTENTS; | |
| 99 if (!drop_data.download_metadata.empty() && | |
| 100 drag_download_util::ParseDownloadMetadata(drop_data.download_metadata, | |
| 101 &wide_download_mime_type_, | |
| 102 &download_file_name_, | |
| 103 &download_url_)) { | |
| 104 targets_mask |= ui::DIRECT_SAVE_FILE; | |
| 105 } | |
| 106 if (!drop_data.custom_data.empty()) | |
| 107 targets_mask |= ui::CUSTOM_DATA; | |
| 108 | |
| 109 // NOTE: Begin a drag even if no targets present. Otherwise, things like | |
| 110 // draggable list elements will not work. | |
| 111 | |
| 112 drop_data_.reset(new WebDropData(drop_data)); | |
| 113 | |
| 114 // The image we get from WebKit makes heavy use of alpha-shading. This looks | |
| 115 // bad on non-compositing WMs. Fall back to the default drag icon. | |
| 116 if (!image.isNull() && ui::IsScreenComposited()) | |
| 117 drag_pixbuf_ = gfx::GdkPixbufFromSkBitmap(&image); | |
| 118 image_offset_ = image_offset; | |
| 119 | |
| 120 GtkTargetList* list = ui::GetTargetListFromCodeMask(targets_mask); | |
| 121 if (targets_mask & ui::CHROME_WEBDROP_FILE_CONTENTS) { | |
| 122 // Looking up the mime type can hit the disk. http://crbug.com/84896 | |
| 123 base::ThreadRestrictions::ScopedAllowIO allow_io; | |
| 124 drag_file_mime_type_ = gdk_atom_intern( | |
| 125 base::nix::GetDataMimeType(drop_data.file_contents).c_str(), FALSE); | |
| 126 gtk_target_list_add(list, drag_file_mime_type_, | |
| 127 0, ui::CHROME_WEBDROP_FILE_CONTENTS); | |
| 128 } | |
| 129 | |
| 130 drag_failed_ = false; | |
| 131 // If we don't pass an event, GDK won't know what event time to start grabbing | |
| 132 // mouse events. Technically it's the mouse motion event and not the mouse | |
| 133 // down event that causes the drag, but there's no reliable way to know | |
| 134 // *which* motion event initiated the drag, so this will have to do. | |
| 135 // TODO(estade): This can sometimes be very far off, e.g. if the user clicks | |
| 136 // and holds and doesn't start dragging for a long time. I doubt it matters | |
| 137 // much, but we should probably look into the possibility of getting the | |
| 138 // initiating event from webkit. | |
| 139 drag_context_ = gtk_drag_begin(drag_widget_, list, | |
| 140 content::WebDragOpToGdkDragAction(allowed_ops), | |
| 141 1, // Drags are always initiated by the left button. | |
| 142 reinterpret_cast<GdkEvent*>(last_mouse_down)); | |
| 143 // The drag adds a ref; let it own the list. | |
| 144 gtk_target_list_unref(list); | |
| 145 | |
| 146 // Sometimes the drag fails to start; |context| will be NULL and we won't | |
| 147 // get a drag-end signal. | |
| 148 if (!drag_context_) { | |
| 149 drag_failed_ = true; | |
| 150 drop_data_.reset(); | |
| 151 web_contents_->SystemDragEnded(); | |
| 152 return; | |
| 153 } | |
| 154 | |
| 155 MessageLoopForUI::current()->AddObserver(this); | |
| 156 } | |
| 157 | |
| 158 void WebDragSourceGtk::WillProcessEvent(GdkEvent* event) { | |
| 159 // No-op. | |
| 160 } | |
| 161 | |
| 162 void WebDragSourceGtk::DidProcessEvent(GdkEvent* event) { | |
| 163 if (event->type != GDK_MOTION_NOTIFY) | |
| 164 return; | |
| 165 | |
| 166 GdkEventMotion* event_motion = reinterpret_cast<GdkEventMotion*>(event); | |
| 167 gfx::Point client = ui::ClientPoint(GetContentNativeView()); | |
| 168 | |
| 169 if (GetRenderViewHost()) { | |
| 170 GetRenderViewHost()->DragSourceMovedTo( | |
| 171 client.x(), client.y(), | |
| 172 static_cast<int>(event_motion->x_root), | |
| 173 static_cast<int>(event_motion->y_root)); | |
| 174 } | |
| 175 } | |
| 176 | |
| 177 void WebDragSourceGtk::OnDragDataGet(GtkWidget* sender, | |
| 178 GdkDragContext* context, | |
| 179 GtkSelectionData* selection_data, | |
| 180 guint target_type, | |
| 181 guint time) { | |
| 182 const int kBitsPerByte = 8; | |
| 183 | |
| 184 switch (target_type) { | |
| 185 case ui::TEXT_PLAIN: { | |
| 186 std::string utf8_text = UTF16ToUTF8(drop_data_->plain_text); | |
| 187 gtk_selection_data_set_text(selection_data, utf8_text.c_str(), | |
| 188 utf8_text.length()); | |
| 189 break; | |
| 190 } | |
| 191 | |
| 192 case ui::TEXT_HTML: { | |
| 193 // TODO(estade): change relative links to be absolute using | |
| 194 // |html_base_url|. | |
| 195 std::string utf8_text = UTF16ToUTF8(drop_data_->text_html); | |
| 196 gtk_selection_data_set(selection_data, | |
| 197 ui::GetAtomForTarget(ui::TEXT_HTML), | |
| 198 kBitsPerByte, | |
| 199 reinterpret_cast<const guchar*>(utf8_text.c_str()), | |
| 200 utf8_text.length()); | |
| 201 break; | |
| 202 } | |
| 203 | |
| 204 case ui::TEXT_URI_LIST: | |
| 205 case ui::CHROME_NAMED_URL: | |
| 206 case ui::NETSCAPE_URL: { | |
| 207 ui::WriteURLWithName(selection_data, drop_data_->url, | |
| 208 drop_data_->url_title, target_type); | |
| 209 break; | |
| 210 } | |
| 211 | |
| 212 case ui::CHROME_WEBDROP_FILE_CONTENTS: { | |
| 213 gtk_selection_data_set( | |
| 214 selection_data, | |
| 215 drag_file_mime_type_, kBitsPerByte, | |
| 216 reinterpret_cast<const guchar*>(drop_data_->file_contents.data()), | |
| 217 drop_data_->file_contents.length()); | |
| 218 break; | |
| 219 } | |
| 220 | |
| 221 case ui::DIRECT_SAVE_FILE: { | |
| 222 char status_code = 'E'; | |
| 223 | |
| 224 // Retrieves the full file path (in file URL format) provided by the | |
| 225 // drop target by reading from the source window's XdndDirectSave0 | |
| 226 // property. | |
| 227 gint file_url_len = 0; | |
| 228 guchar* file_url_value = NULL; | |
| 229 if (gdk_property_get(context->source_window, | |
| 230 ui::GetAtomForTarget(ui::DIRECT_SAVE_FILE), | |
| 231 ui::GetAtomForTarget(ui::TEXT_PLAIN_NO_CHARSET), | |
| 232 0, | |
| 233 1024, | |
| 234 FALSE, | |
| 235 NULL, | |
| 236 NULL, | |
| 237 &file_url_len, | |
| 238 &file_url_value) && | |
| 239 file_url_value) { | |
| 240 // Convert from the file url to the file path. | |
| 241 GURL file_url(std::string(reinterpret_cast<char*>(file_url_value), | |
| 242 file_url_len)); | |
| 243 g_free(file_url_value); | |
| 244 FilePath file_path; | |
| 245 if (net::FileURLToFilePath(file_url, &file_path)) { | |
| 246 // Open the file as a stream. | |
| 247 net::FileStream* file_stream = | |
| 248 drag_download_util::CreateFileStreamForDrop( | |
| 249 &file_path, | |
| 250 content::GetContentClient()->browser()->GetNetLog()); | |
| 251 if (file_stream) { | |
| 252 // Start downloading the file to the stream. | |
| 253 scoped_refptr<DragDownloadFile> drag_file_downloader = | |
| 254 new DragDownloadFile(file_path, | |
| 255 linked_ptr<net::FileStream>(file_stream), | |
| 256 download_url_, | |
| 257 web_contents_->GetURL(), | |
| 258 web_contents_->GetEncoding(), | |
| 259 web_contents_); | |
| 260 drag_file_downloader->Start( | |
| 261 new drag_download_util::PromiseFileFinalizer( | |
| 262 drag_file_downloader)); | |
| 263 | |
| 264 // Set the status code to success. | |
| 265 status_code = 'S'; | |
| 266 } | |
| 267 } | |
| 268 | |
| 269 // Return the status code to the file manager. | |
| 270 gtk_selection_data_set(selection_data, | |
| 271 gtk_selection_data_get_target(selection_data), | |
| 272 kBitsPerByte, | |
| 273 reinterpret_cast<guchar*>(&status_code), | |
| 274 1); | |
| 275 } | |
| 276 break; | |
| 277 } | |
| 278 | |
| 279 case ui::CUSTOM_DATA: { | |
| 280 Pickle custom_data; | |
| 281 ui::WriteCustomDataToPickle(drop_data_->custom_data, &custom_data); | |
| 282 gtk_selection_data_set( | |
| 283 selection_data, | |
| 284 ui::GetAtomForTarget(ui::CUSTOM_DATA), | |
| 285 kBitsPerByte, | |
| 286 reinterpret_cast<const guchar*>(custom_data.data()), | |
| 287 custom_data.size()); | |
| 288 break; | |
| 289 } | |
| 290 | |
| 291 default: | |
| 292 NOTREACHED(); | |
| 293 } | |
| 294 } | |
| 295 | |
| 296 gboolean WebDragSourceGtk::OnDragFailed(GtkWidget* sender, | |
| 297 GdkDragContext* context, | |
| 298 GtkDragResult result) { | |
| 299 drag_failed_ = true; | |
| 300 | |
| 301 gfx::Point root = ui::ScreenPoint(GetContentNativeView()); | |
| 302 gfx::Point client = ui::ClientPoint(GetContentNativeView()); | |
| 303 | |
| 304 if (GetRenderViewHost()) { | |
| 305 GetRenderViewHost()->DragSourceEndedAt( | |
| 306 client.x(), client.y(), root.x(), root.y(), | |
| 307 WebDragOperationNone); | |
| 308 } | |
| 309 | |
| 310 // Let the native failure animation run. | |
| 311 return FALSE; | |
| 312 } | |
| 313 | |
| 314 void WebDragSourceGtk::OnDragBegin(GtkWidget* sender, | |
| 315 GdkDragContext* drag_context) { | |
| 316 if (!download_url_.is_empty()) { | |
| 317 // Generate the file name based on both mime type and proposed file name. | |
| 318 std::string default_name = | |
| 319 content::GetContentClient()->browser()->GetDefaultDownloadName(); | |
| 320 FilePath generated_download_file_name = | |
| 321 net::GenerateFileName(download_url_, | |
| 322 std::string(), | |
| 323 std::string(), | |
| 324 download_file_name_.value(), | |
| 325 UTF16ToUTF8(wide_download_mime_type_), | |
| 326 default_name); | |
| 327 | |
| 328 // Pass the file name to the drop target by setting the source window's | |
| 329 // XdndDirectSave0 property. | |
| 330 gdk_property_change(drag_context->source_window, | |
| 331 ui::GetAtomForTarget(ui::DIRECT_SAVE_FILE), | |
| 332 ui::GetAtomForTarget(ui::TEXT_PLAIN_NO_CHARSET), | |
| 333 8, | |
| 334 GDK_PROP_MODE_REPLACE, | |
| 335 reinterpret_cast<const guchar*>( | |
| 336 generated_download_file_name.value().c_str()), | |
| 337 generated_download_file_name.value().length()); | |
| 338 } | |
| 339 | |
| 340 if (drag_pixbuf_) { | |
| 341 gtk_widget_set_size_request(drag_icon_, | |
| 342 gdk_pixbuf_get_width(drag_pixbuf_), | |
| 343 gdk_pixbuf_get_height(drag_pixbuf_)); | |
| 344 | |
| 345 // We only need to do this once. | |
| 346 if (!gtk_widget_get_realized(drag_icon_)) { | |
| 347 GdkScreen* screen = gtk_widget_get_screen(drag_icon_); | |
| 348 GdkColormap* rgba = gdk_screen_get_rgba_colormap(screen); | |
| 349 if (rgba) | |
| 350 gtk_widget_set_colormap(drag_icon_, rgba); | |
| 351 } | |
| 352 | |
| 353 gtk_drag_set_icon_widget(drag_context, drag_icon_, | |
| 354 image_offset_.x(), image_offset_.y()); | |
| 355 } | |
| 356 } | |
| 357 | |
| 358 void WebDragSourceGtk::OnDragEnd(GtkWidget* sender, | |
| 359 GdkDragContext* drag_context) { | |
| 360 if (drag_pixbuf_) { | |
| 361 g_object_unref(drag_pixbuf_); | |
| 362 drag_pixbuf_ = NULL; | |
| 363 } | |
| 364 | |
| 365 MessageLoopForUI::current()->RemoveObserver(this); | |
| 366 | |
| 367 if (!download_url_.is_empty()) { | |
| 368 gdk_property_delete(drag_context->source_window, | |
| 369 ui::GetAtomForTarget(ui::DIRECT_SAVE_FILE)); | |
| 370 } | |
| 371 | |
| 372 if (!drag_failed_) { | |
| 373 gfx::Point root = ui::ScreenPoint(GetContentNativeView()); | |
| 374 gfx::Point client = ui::ClientPoint(GetContentNativeView()); | |
| 375 | |
| 376 if (GetRenderViewHost()) { | |
| 377 GetRenderViewHost()->DragSourceEndedAt( | |
| 378 client.x(), client.y(), root.x(), root.y(), | |
| 379 content::GdkDragActionToWebDragOp(drag_context->action)); | |
| 380 } | |
| 381 } | |
| 382 | |
| 383 web_contents_->SystemDragEnded(); | |
| 384 | |
| 385 drop_data_.reset(); | |
| 386 drag_context_ = NULL; | |
| 387 } | |
| 388 | |
| 389 RenderViewHostImpl* WebDragSourceGtk::GetRenderViewHost() const { | |
| 390 return static_cast<RenderViewHostImpl*>(web_contents_->GetRenderViewHost()); | |
| 391 } | |
| 392 | |
| 393 gfx::NativeView WebDragSourceGtk::GetContentNativeView() const { | |
| 394 return web_contents_->GetView()->GetContentNativeView(); | |
| 395 } | |
| 396 | |
| 397 gboolean WebDragSourceGtk::OnDragIconExpose(GtkWidget* sender, | |
| 398 GdkEventExpose* event) { | |
| 399 cairo_t* cr = gdk_cairo_create(event->window); | |
| 400 gdk_cairo_rectangle(cr, &event->area); | |
| 401 cairo_clip(cr); | |
| 402 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); | |
| 403 gdk_cairo_set_source_pixbuf(cr, drag_pixbuf_, 0, 0); | |
| 404 cairo_paint(cr); | |
| 405 cairo_destroy(cr); | |
| 406 | |
| 407 return TRUE; | |
| 408 } | |
| 409 | |
| 410 } // namespace content | |
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Chromium Code Reviews
Issue 10014024:
TabContents -> WebContentsImpl, part 2. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src