1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/tab_contents/web_drop_target_win.h"
#include <windows.h>
#include <shlobj.h>
#include "app/os_exchange_data.h"
#include "app/os_exchange_data_provider_win.h"
#include "chrome/browser/bookmarks/bookmark_node_data.h"
#include "chrome/browser/renderer_host/render_view_host.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "chrome/browser/tab_contents/web_drag_utils_win.h"
#include "gfx/point.h"
#include "googleurl/src/gurl.h"
#include "net/base/net_util.h"
#include "ui/base/clipboard/clipboard_util_win.h"
#include "webkit/glue/webdropdata.h"
#include "webkit/glue/window_open_disposition.h"
using WebKit::WebDragOperationNone;
using WebKit::WebDragOperationCopy;
using WebKit::WebDragOperationLink;
using WebKit::WebDragOperationMove;
using WebKit::WebDragOperationGeneric;
namespace {
// A helper method for getting the preferred drop effect.
DWORD GetPreferredDropEffect(DWORD effect) {
if (effect & DROPEFFECT_COPY)
return DROPEFFECT_COPY;
if (effect & DROPEFFECT_LINK)
return DROPEFFECT_LINK;
if (effect & DROPEFFECT_MOVE)
return DROPEFFECT_MOVE;
return DROPEFFECT_NONE;
}
} // namespace
// InterstitialDropTarget is like a app::win::DropTarget implementation that
// WebDropTarget passes through to if an interstitial is showing. Rather than
// passing messages on to the renderer, we just check to see if there's a link
// in the drop data and handle links as navigations.
class InterstitialDropTarget {
public:
explicit InterstitialDropTarget(TabContents* tab_contents)
: tab_contents_(tab_contents) {}
DWORD OnDragEnter(IDataObject* data_object, DWORD effect) {
return ui::ClipboardUtil::HasUrl(data_object) ?
GetPreferredDropEffect(effect) : DROPEFFECT_NONE;
}
DWORD OnDragOver(IDataObject* data_object, DWORD effect) {
return ui::ClipboardUtil::HasUrl(data_object) ?
GetPreferredDropEffect(effect) : DROPEFFECT_NONE;
}
void OnDragLeave(IDataObject* data_object) {
}
DWORD OnDrop(IDataObject* data_object, DWORD effect) {
if (ui::ClipboardUtil::HasUrl(data_object)) {
std::wstring url;
std::wstring title;
ui::ClipboardUtil::GetUrl(data_object, &url, &title, true);
tab_contents_->OpenURL(GURL(url), GURL(), CURRENT_TAB,
PageTransition::AUTO_BOOKMARK);
return GetPreferredDropEffect(effect);
}
return DROPEFFECT_NONE;
}
private:
TabContents* tab_contents_;
DISALLOW_COPY_AND_ASSIGN(InterstitialDropTarget);
};
WebDropTarget::WebDropTarget(HWND source_hwnd, TabContents* tab_contents)
: app::win::DropTarget(source_hwnd),
tab_contents_(tab_contents),
current_rvh_(NULL),
drag_cursor_(WebDragOperationNone),
interstitial_drop_target_(new InterstitialDropTarget(tab_contents)) {
}
WebDropTarget::~WebDropTarget() {
}
DWORD WebDropTarget::OnDragEnter(IDataObject* data_object,
DWORD key_state,
POINT cursor_position,
DWORD effects) {
current_rvh_ = tab_contents_->render_view_host();
// Don't pass messages to the renderer if an interstitial page is showing
// because we don't want the interstitial page to navigate. Instead,
// pass the messages on to a separate interstitial DropTarget handler.
if (tab_contents_->showing_interstitial_page())
return interstitial_drop_target_->OnDragEnter(data_object, effects);
// TODO(tc): PopulateWebDropData can be slow depending on what is in the
// IDataObject. Maybe we can do this in a background thread.
WebDropData drop_data(GetDragIdentity());
WebDropData::PopulateWebDropData(data_object, &drop_data);
if (drop_data.url.is_empty())
OSExchangeDataProviderWin::GetPlainTextURL(data_object, &drop_data.url);
drag_cursor_ = WebDragOperationNone;
POINT client_pt = cursor_position;
ScreenToClient(GetHWND(), &client_pt);
tab_contents_->render_view_host()->DragTargetDragEnter(drop_data,
gfx::Point(client_pt.x, client_pt.y),
gfx::Point(cursor_position.x, cursor_position.y),
web_drag_utils_win::WinDragOpMaskToWebDragOpMask(effects));
// This is non-null if tab_contents_ is showing an ExtensionDOMUI with
// support for (at the moment experimental) drag and drop extensions.
if (tab_contents_->GetBookmarkDragDelegate()) {
OSExchangeData os_exchange_data(new OSExchangeDataProviderWin(data_object));
BookmarkNodeData bookmark_drag_data;
if (bookmark_drag_data.Read(os_exchange_data))
tab_contents_->GetBookmarkDragDelegate()->OnDragEnter(bookmark_drag_data);
}
// We lie here and always return a DROPEFFECT because we don't want to
// wait for the IPC call to return.
return web_drag_utils_win::WebDragOpToWinDragOp(drag_cursor_);
}
DWORD WebDropTarget::OnDragOver(IDataObject* data_object,
DWORD key_state,
POINT cursor_position,
DWORD effects) {
DCHECK(current_rvh_);
if (current_rvh_ != tab_contents_->render_view_host())
OnDragEnter(data_object, key_state, cursor_position, effects);
if (tab_contents_->showing_interstitial_page())
return interstitial_drop_target_->OnDragOver(data_object, effects);
POINT client_pt = cursor_position;
ScreenToClient(GetHWND(), &client_pt);
tab_contents_->render_view_host()->DragTargetDragOver(
gfx::Point(client_pt.x, client_pt.y),
gfx::Point(cursor_position.x, cursor_position.y),
web_drag_utils_win::WinDragOpMaskToWebDragOpMask(effects));
if (tab_contents_->GetBookmarkDragDelegate()) {
OSExchangeData os_exchange_data(new OSExchangeDataProviderWin(data_object));
BookmarkNodeData bookmark_drag_data;
if (bookmark_drag_data.Read(os_exchange_data))
tab_contents_->GetBookmarkDragDelegate()->OnDragOver(bookmark_drag_data);
}
return web_drag_utils_win::WebDragOpToWinDragOp(drag_cursor_);
}
void WebDropTarget::OnDragLeave(IDataObject* data_object) {
DCHECK(current_rvh_);
if (current_rvh_ != tab_contents_->render_view_host())
return;
if (tab_contents_->showing_interstitial_page()) {
interstitial_drop_target_->OnDragLeave(data_object);
} else {
tab_contents_->render_view_host()->DragTargetDragLeave();
}
if (tab_contents_->GetBookmarkDragDelegate()) {
OSExchangeData os_exchange_data(new OSExchangeDataProviderWin(data_object));
BookmarkNodeData bookmark_drag_data;
if (bookmark_drag_data.Read(os_exchange_data))
tab_contents_->GetBookmarkDragDelegate()->OnDragLeave(bookmark_drag_data);
}
}
DWORD WebDropTarget::OnDrop(IDataObject* data_object,
DWORD key_state,
POINT cursor_position,
DWORD effect) {
DCHECK(current_rvh_);
if (current_rvh_ != tab_contents_->render_view_host())
OnDragEnter(data_object, key_state, cursor_position, effect);
if (tab_contents_->showing_interstitial_page())
interstitial_drop_target_->OnDragOver(data_object, effect);
if (tab_contents_->showing_interstitial_page())
return interstitial_drop_target_->OnDrop(data_object, effect);
POINT client_pt = cursor_position;
ScreenToClient(GetHWND(), &client_pt);
tab_contents_->render_view_host()->DragTargetDrop(
gfx::Point(client_pt.x, client_pt.y),
gfx::Point(cursor_position.x, cursor_position.y));
if (tab_contents_->GetBookmarkDragDelegate()) {
OSExchangeData os_exchange_data(new OSExchangeDataProviderWin(data_object));
BookmarkNodeData bookmark_drag_data;
if (bookmark_drag_data.Read(os_exchange_data))
tab_contents_->GetBookmarkDragDelegate()->OnDrop(bookmark_drag_data);
}
current_rvh_ = NULL;
// This isn't always correct, but at least it's a close approximation.
// For now, we always map a move to a copy to prevent potential data loss.
DWORD drop_effect = web_drag_utils_win::WebDragOpToWinDragOp(drag_cursor_);
return drop_effect != DROPEFFECT_MOVE ? drop_effect : DROPEFFECT_COPY;
}
|
