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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 #ifndef CHROME_BROWSER_UI_VIEWS_TAB_CONTENTS_TAB_CONTENTS_DRAG_WIN_H_ | |
| 6 #define CHROME_BROWSER_UI_VIEWS_TAB_CONTENTS_TAB_CONTENTS_DRAG_WIN_H_ | |
| 7 #pragma once | |
| 8 | |
| 9 #include "base/callback.h" | |
| 10 #include "base/memory/ref_counted.h" | |
| 11 #include "base/memory/scoped_ptr.h" | |
| 12 #include "base/threading/platform_thread.h" | |
| 13 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h" | |
| 14 #include "third_party/skia/include/core/SkBitmap.h" | |
| 15 #include "ui/base/dragdrop/os_exchange_data_provider_win.h" | |
| 16 #include "ui/gfx/native_widget_types.h" | |
| 17 #include "ui/gfx/point.h" | |
| 18 | |
| 19 class DragDropThread; | |
| 20 class WebDragDest; | |
| 21 class WebDragSource; | |
| 22 struct WebDropData; | |
| 23 | |
| 24 namespace content { | |
| 25 class WebContents; | |
| 26 } | |
| 27 | |
| 28 // Windows-specific drag-and-drop handling in WebContentsView. | |
| 29 // If we are dragging a virtual file out of the browser, we use a background | |
| 30 // thread to do the drag-and-drop because we do not want to run nested | |
| 31 // message loop in the UI thread. For all other cases, the drag-and-drop happens | |
| 32 // in the UI thread. | |
| 33 class TabContentsDragWin | |
| 34 : public ui::DataObjectImpl::Observer, | |
| 35 public base::RefCountedThreadSafe<TabContentsDragWin> { | |
| 36 public: | |
| 37 TabContentsDragWin(gfx::NativeWindow source_window, | |
| 38 content::WebContents* web_contents, | |
| 39 WebDragDest* drag_dest, | |
| 40 const base::Callback<void()>& drag_end_callback); | |
| 41 virtual ~TabContentsDragWin(); | |
| 42 | |
| 43 // Called on UI thread. | |
| 44 void StartDragging(const WebDropData& drop_data, | |
| 45 WebKit::WebDragOperationsMask ops, | |
| 46 const SkBitmap& image, | |
| 47 const gfx::Point& image_offset); | |
| 48 void CancelDrag(); | |
| 49 | |
| 50 // DataObjectImpl::Observer implementation. | |
| 51 // Called on drag-and-drop thread. | |
| 52 virtual void OnWaitForData(); | |
| 53 virtual void OnDataObjectDisposed(); | |
| 54 | |
| 55 private: | |
| 56 // Called on either UI thread or drag-and-drop thread. | |
| 57 void PrepareDragForDownload(const WebDropData& drop_data, | |
| 58 ui::OSExchangeData* data, | |
| 59 const GURL& page_url, | |
| 60 const std::string& page_encoding); | |
| 61 void PrepareDragForFileContents(const WebDropData& drop_data, | |
| 62 ui::OSExchangeData* data); | |
| 63 void PrepareDragForUrl(const WebDropData& drop_data, | |
| 64 ui::OSExchangeData* data); | |
| 65 void DoDragging(const WebDropData& drop_data, | |
| 66 WebKit::WebDragOperationsMask ops, | |
| 67 const GURL& page_url, | |
| 68 const std::string& page_encoding, | |
| 69 const SkBitmap& image, | |
| 70 const gfx::Point& image_offset); | |
| 71 | |
| 72 // Called on drag-and-drop thread. | |
| 73 void StartBackgroundDragging(const WebDropData& drop_data, | |
| 74 WebKit::WebDragOperationsMask ops, | |
| 75 const GURL& page_url, | |
| 76 const std::string& page_encoding, | |
| 77 const SkBitmap& image, | |
| 78 const gfx::Point& image_offset); | |
| 79 // Called on UI thread. | |
| 80 void EndDragging(bool restore_suspended_state); | |
| 81 void CloseThread(); | |
| 82 | |
| 83 // For debug check only. Access only on drag-and-drop thread. | |
| 84 base::PlatformThreadId drag_drop_thread_id_; | |
| 85 | |
| 86 // All the member variables below are accessed on UI thread. | |
| 87 | |
| 88 gfx::NativeWindow source_window_; | |
| 89 content::WebContents* web_contents_; | |
| 90 WebDragDest* drag_dest_; | |
| 91 | |
| 92 // |drag_source_| is our callback interface passed to the system when we | |
| 93 // want to initiate a drag and drop operation. We use it to tell if a | |
| 94 // drag operation is happening. | |
| 95 scoped_refptr<WebDragSource> drag_source_; | |
| 96 | |
| 97 // The thread used by the drag-out download. This is because we want to avoid | |
| 98 // running nested message loop in main UI thread. | |
| 99 scoped_ptr<DragDropThread> drag_drop_thread_; | |
| 100 | |
| 101 // The flag to guard that EndDragging is not called twice. | |
| 102 bool drag_ended_; | |
| 103 | |
| 104 // Keep track of the old suspended state of the drop target. | |
| 105 bool old_drop_target_suspended_state_; | |
| 106 | |
| 107 base::Callback<void()> drag_end_callback_; | |
| 108 | |
| 109 DISALLOW_COPY_AND_ASSIGN(TabContentsDragWin); | |
| 110 }; | |
| 111 | |
| 112 | |
| 113 #endif // CHROME_BROWSER_UI_VIEWS_TAB_CONTENTS_TAB_CONTENTS_DRAG_WIN_H_ | |
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Chromium Code Reviews
Issue 9594012:
Move TabContentsDragWin to content and rename it to WebContentsDragWin. (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/