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| 1 // Copyright (c) 2011 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 "chrome/browser/tab_contents/web_drag_source_win.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "chrome/browser/tab_contents/web_drag_utils_win.h" | |
| 9 #include "content/browser/renderer_host/render_view_host.h" | |
| 10 #include "content/public/browser/browser_thread.h" | |
| 11 #include "content/public/browser/notification_source.h" | |
| 12 #include "content/public/browser/notification_types.h" | |
| 13 #include "content/public/browser/web_contents.h" | |
| 14 | |
| 15 using WebKit::WebDragOperationNone; | |
| 16 using content::BrowserThread; | |
| 17 using content::WebContents; | |
| 18 | |
| 19 namespace { | |
| 20 | |
| 21 static void GetCursorPositions(gfx::NativeWindow wnd, gfx::Point* client, | |
| 22 gfx::Point* screen) { | |
| 23 POINT cursor_pos; | |
| 24 GetCursorPos(&cursor_pos); | |
| 25 screen->SetPoint(cursor_pos.x, cursor_pos.y); | |
| 26 ScreenToClient(wnd, &cursor_pos); | |
| 27 client->SetPoint(cursor_pos.x, cursor_pos.y); | |
| 28 } | |
| 29 | |
| 30 } // namespace | |
| 31 | |
| 32 /////////////////////////////////////////////////////////////////////////////// | |
| 33 // WebDragSource, public: | |
| 34 | |
| 35 WebDragSource::WebDragSource(gfx::NativeWindow source_wnd, | |
| 36 WebContents* web_contents) | |
| 37 : ui::DragSource(), | |
| 38 source_wnd_(source_wnd), | |
| 39 render_view_host_(web_contents->GetRenderViewHost()), | |
| 40 effect_(DROPEFFECT_NONE) { | |
| 41 registrar_.Add(this, content::NOTIFICATION_WEB_CONTENTS_SWAPPED, | |
| 42 content::Source<WebContents>(web_contents)); | |
| 43 registrar_.Add(this, content::NOTIFICATION_WEB_CONTENTS_DISCONNECTED, | |
| 44 content::Source<WebContents>(web_contents)); | |
| 45 } | |
| 46 | |
| 47 WebDragSource::~WebDragSource() { | |
| 48 } | |
| 49 | |
| 50 void WebDragSource::OnDragSourceCancel() { | |
| 51 // Delegate to the UI thread if we do drag-and-drop in the background thread. | |
| 52 if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) { | |
| 53 BrowserThread::PostTask( | |
| 54 BrowserThread::UI, FROM_HERE, | |
| 55 base::Bind(&WebDragSource::OnDragSourceCancel, this)); | |
| 56 return; | |
| 57 } | |
| 58 | |
| 59 if (!render_view_host_) | |
| 60 return; | |
| 61 | |
| 62 gfx::Point client; | |
| 63 gfx::Point screen; | |
| 64 GetCursorPositions(source_wnd_, &client, &screen); | |
| 65 render_view_host_->DragSourceEndedAt(client.x(), client.y(), | |
| 66 screen.x(), screen.y(), | |
| 67 WebDragOperationNone); | |
| 68 } | |
| 69 | |
| 70 void WebDragSource::OnDragSourceDrop() { | |
| 71 // On Windows, we check for drag end in IDropSource::QueryContinueDrag which | |
| 72 // happens before IDropTarget::Drop is called. HTML5 requires the "dragend" | |
| 73 // event to happen after the "drop" event. Since Windows calls these two | |
| 74 // directly after each other we can just post a task to handle the | |
| 75 // OnDragSourceDrop after the current task. | |
| 76 BrowserThread::PostTask( | |
| 77 BrowserThread::UI, FROM_HERE, | |
| 78 base::Bind(&WebDragSource::DelayedOnDragSourceDrop, this)); | |
| 79 } | |
| 80 | |
| 81 void WebDragSource::DelayedOnDragSourceDrop() { | |
| 82 if (!render_view_host_) | |
| 83 return; | |
| 84 | |
| 85 gfx::Point client; | |
| 86 gfx::Point screen; | |
| 87 GetCursorPositions(source_wnd_, &client, &screen); | |
| 88 render_view_host_->DragSourceEndedAt( | |
| 89 client.x(), client.y(), screen.x(), screen.y(), | |
| 90 web_drag_utils_win::WinDragOpToWebDragOp(effect_)); | |
| 91 } | |
| 92 | |
| 93 void WebDragSource::OnDragSourceMove() { | |
| 94 // Delegate to the UI thread if we do drag-and-drop in the background thread. | |
| 95 if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) { | |
| 96 BrowserThread::PostTask( | |
| 97 BrowserThread::UI, FROM_HERE, | |
| 98 base::Bind(&WebDragSource::OnDragSourceMove, this)); | |
| 99 return; | |
| 100 } | |
| 101 | |
| 102 if (!render_view_host_) | |
| 103 return; | |
| 104 | |
| 105 gfx::Point client; | |
| 106 gfx::Point screen; | |
| 107 GetCursorPositions(source_wnd_, &client, &screen); | |
| 108 render_view_host_->DragSourceMovedTo(client.x(), client.y(), | |
| 109 screen.x(), screen.y()); | |
| 110 } | |
| 111 | |
| 112 void WebDragSource::Observe(int type, | |
| 113 const content::NotificationSource& source, | |
| 114 const content::NotificationDetails& details) { | |
| 115 if (content::NOTIFICATION_WEB_CONTENTS_SWAPPED == type) { | |
| 116 // When the tab contents get swapped, our render view host goes away. | |
| 117 // That's OK, we can continue the drag, we just can't send messages back to | |
| 118 // our drag source. | |
| 119 render_view_host_ = NULL; | |
| 120 } else if (content::NOTIFICATION_WEB_CONTENTS_DISCONNECTED == type) { | |
| 121 // This could be possible when we close the tab and the source is still | |
| 122 // being used in DoDragDrop at the time that the virtual file is being | |
| 123 // downloaded. | |
| 124 render_view_host_ = NULL; | |
| 125 } | |
| 126 } | |
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Chromium Code Reviews
Issue 9562049:
Move the core drag&drop code for Windows to content\browser to match Mac/GTK. I've had to add tempo… (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/