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 #ifndef CONTENT_BROWSER_WEB_CONTENTS_WEB_DRAG_SOURCE_GTK_H_ 6 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_DRAG_SOURCE_GTK_H_ 7 8 #include <gtk/gtk.h> 9 10 #include "base/basictypes.h" 11 #include "base/files/file_path.h" 12 #include "base/message_loop/message_loop.h" 13 #include "base/strings/string16.h" 14 #include "content/common/content_export.h" 15 #include "content/public/browser/web_contents.h" 16 #include "third_party/WebKit/public/web/WebDragOperation.h" 17 #include "ui/base/gtk/gtk_signal.h" 18 #include "ui/base/gtk/gtk_signal_registrar.h" 19 #include "ui/gfx/native_widget_types.h" 20 #include "ui/gfx/vector2d.h" 21 #include "url/gurl.h" 22 23 class SkBitmap; 24 25 namespace content { 26 27 class RenderViewHostImpl; 28 class WebContentsImpl; 29 struct DropData; 30 31 // WebDragSourceGtk takes care of managing the drag from a WebContents 32 // with Gtk. 33 class CONTENT_EXPORT WebDragSourceGtk : 34 public base::MessageLoopForUI::Observer { 35 public: 36 explicit WebDragSourceGtk(WebContents* web_contents); 37 virtual ~WebDragSourceGtk(); 38 39 // Starts a drag for the WebContents this WebDragSourceGtk was created for. 40 // Returns false if the drag could not be started. 41 bool StartDragging(const DropData& drop_data, 42 WebKit::WebDragOperationsMask allowed_ops, 43 GdkEventButton* last_mouse_down, 44 const SkBitmap& image, 45 const gfx::Vector2d& image_offset); 46 47 // MessageLoop::Observer implementation: 48 virtual void WillProcessEvent(GdkEvent* event) OVERRIDE; 49 virtual void DidProcessEvent(GdkEvent* event) OVERRIDE; 50 51 private: 52 CHROMEGTK_CALLBACK_2(WebDragSourceGtk, gboolean, OnDragFailed, 53 GdkDragContext*, GtkDragResult); 54 CHROMEGTK_CALLBACK_1(WebDragSourceGtk, void, OnDragBegin, 55 GdkDragContext*); 56 CHROMEGTK_CALLBACK_1(WebDragSourceGtk, void, OnDragEnd, 57 GdkDragContext*); 58 CHROMEGTK_CALLBACK_4(WebDragSourceGtk, void, OnDragDataGet, 59 GdkDragContext*, GtkSelectionData*, guint, guint); 60 CHROMEGTK_CALLBACK_1(WebDragSourceGtk, gboolean, OnDragIconExpose, 61 GdkEventExpose*); 62 63 gfx::NativeView GetContentNativeView() const; 64 65 // The tab we're manging the drag for. 66 WebContentsImpl* web_contents_; 67 68 // The drop data for the current drag (for drags that originate in the render 69 // view). Non-NULL iff there is a current drag. 70 scoped_ptr<DropData> drop_data_; 71 72 // The image used for depicting the drag, and the offset between the cursor 73 // and the top left pixel. 74 GdkPixbuf* drag_pixbuf_; 75 gfx::Vector2d image_offset_; 76 77 // The mime type for the file contents of the current drag (if any). 78 GdkAtom drag_file_mime_type_; 79 80 // Whether the current drag has failed. Meaningless if we are not the source 81 // for a current drag. 82 bool drag_failed_; 83 84 // This is the widget we use to initiate drags. Since we don't use the 85 // renderer widget, we can persist drags even when our contents is switched 86 // out. We can't use an OwnedWidgetGtk because the GtkInvisible widget 87 // initialization code sinks the reference. 88 GtkWidget* drag_widget_; 89 90 // Context created once drag starts. A NULL value indicates that there is 91 // no drag currently in progress. 92 GdkDragContext* drag_context_; 93 94 // The file mime type for a drag-out download. 95 string16 wide_download_mime_type_; 96 97 // The file name to be saved to for a drag-out download. 98 base::FilePath download_file_name_; 99 100 // The URL to download from for a drag-out download. 101 GURL download_url_; 102 103 // The widget that provides visual feedback for the drag. We can't use 104 // an OwnedWidgetGtk because the GtkWindow initialization code sinks 105 // the reference. 106 GtkWidget* drag_icon_; 107 108 ui::GtkSignalRegistrar signals_; 109 110 DISALLOW_COPY_AND_ASSIGN(WebDragSourceGtk); 111 }; 112 113 } // namespace content 114 115 #endif // CONTENT_BROWSER_WEB_CONTENTS_WEB_DRAG_SOURCE_GTK_H_ 116