external_protocol_dialog.cc revision 58537e28ecd584eab876aee8be7156509866d23a 
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 "chrome/browser/ui/views/external_protocol_dialog.h"
6
7#include "base/metrics/histogram.h"
8#include "base/strings/string_util.h"
9#include "base/strings/utf_string_conversions.h"
10#include "base/threading/thread.h"
11#include "base/threading/thread_restrictions.h"
12#include "base/win/registry.h"
13#include "chrome/browser/external_protocol/external_protocol_handler.h"
14#include "chrome/browser/tab_contents/tab_util.h"
15#include "chrome/browser/ui/views/constrained_window_views.h"
16#include "content/public/browser/web_contents.h"
17#include "content/public/browser/web_contents_view.h"
18#include "grit/chromium_strings.h"
19#include "grit/generated_resources.h"
20#include "ui/base/l10n/l10n_util.h"
21#include "ui/gfx/text_elider.h"
22#include "ui/views/controls/message_box_view.h"
23#include "ui/views/widget/widget.h"
24
25using content::WebContents;
26
27namespace {
28
29const int kMessageWidth = 400;
30
31}  // namespace
32
33///////////////////////////////////////////////////////////////////////////////
34// ExternalProtocolHandler
35
36// static
37void ExternalProtocolHandler::RunExternalProtocolDialog(
38    const GURL& url, int render_process_host_id, int routing_id) {
39  std::wstring command =
40      ExternalProtocolDialog::GetApplicationForProtocol(url);
41  if (command.empty()) {
42    // ShellExecute won't do anything. Don't bother warning the user.
43    return;
44  }
45  WebContents* web_contents = tab_util::GetWebContentsByID(
46      render_process_host_id, routing_id);
47  DCHECK(web_contents);
48  // Windowing system takes ownership.
49  new ExternalProtocolDialog(web_contents, url, command);
50}
51
52///////////////////////////////////////////////////////////////////////////////
53// ExternalProtocolDialog
54
55ExternalProtocolDialog::~ExternalProtocolDialog() {
56}
57
58//////////////////////////////////////////////////////////////////////////////
59// ExternalProtocolDialog, views::DialogDelegate implementation:
60
61int ExternalProtocolDialog::GetDefaultDialogButton() const {
62  return ui::DIALOG_BUTTON_CANCEL;
63}
64
65string16 ExternalProtocolDialog::GetDialogButtonLabel(
66    ui::DialogButton button) const {
67  if (button == ui::DIALOG_BUTTON_OK)
68    return l10n_util::GetStringUTF16(IDS_EXTERNAL_PROTOCOL_OK_BUTTON_TEXT);
69  else
70    return l10n_util::GetStringUTF16(IDS_EXTERNAL_PROTOCOL_CANCEL_BUTTON_TEXT);
71}
72
73string16 ExternalProtocolDialog::GetWindowTitle() const {
74  return l10n_util::GetStringUTF16(IDS_EXTERNAL_PROTOCOL_TITLE);
75}
76
77void ExternalProtocolDialog::DeleteDelegate() {
78  delete this;
79}
80
81bool ExternalProtocolDialog::Cancel() {
82  // We also get called back here if the user closes the dialog or presses
83  // escape. In these cases it would be preferable to ignore the state of the
84  // check box but MessageBox doesn't distinguish this from pressing the cancel
85  // button.
86  if (message_box_view_->IsCheckBoxSelected()) {
87    ExternalProtocolHandler::SetBlockState(
88        url_.scheme(), ExternalProtocolHandler::BLOCK);
89  }
90
91  // Returning true closes the dialog.
92  return true;
93}
94
95bool ExternalProtocolDialog::Accept() {
96  // We record how long it takes the user to accept an external protocol.  If
97  // users start accepting these dialogs too quickly, we should worry about
98  // clickjacking.
99  UMA_HISTOGRAM_LONG_TIMES("clickjacking.launch_url",
100                           base::TimeTicks::Now() - creation_time_);
101
102  if (message_box_view_->IsCheckBoxSelected()) {
103    ExternalProtocolHandler::SetBlockState(
104        url_.scheme(), ExternalProtocolHandler::DONT_BLOCK);
105  }
106
107  ExternalProtocolHandler::LaunchUrlWithoutSecurityCheck(url_);
108  // Returning true closes the dialog.
109  return true;
110}
111
112views::View* ExternalProtocolDialog::GetContentsView() {
113  return message_box_view_;
114}
115
116views::Widget* ExternalProtocolDialog::GetWidget() {
117  return message_box_view_->GetWidget();
118}
119
120const views::Widget* ExternalProtocolDialog::GetWidget() const {
121  return message_box_view_->GetWidget();
122}
123
124///////////////////////////////////////////////////////////////////////////////
125// ExternalProtocolDialog, private:
126
127ExternalProtocolDialog::ExternalProtocolDialog(WebContents* web_contents,
128                                               const GURL& url,
129                                               const std::wstring& command)
130    : web_contents_(web_contents),
131      url_(url),
132      creation_time_(base::TimeTicks::Now()) {
133  const int kMaxUrlWithoutSchemeSize = 256;
134  const int kMaxCommandSize = 256;
135  string16 elided_url_without_scheme;
136  string16 elided_command;
137  gfx::ElideString(ASCIIToUTF16(url.possibly_invalid_spec()),
138                  kMaxUrlWithoutSchemeSize, &elided_url_without_scheme);
139  gfx::ElideString(WideToUTF16Hack(command), kMaxCommandSize, &elided_command);
140
141  string16 message_text = l10n_util::GetStringFUTF16(
142      IDS_EXTERNAL_PROTOCOL_INFORMATION,
143      ASCIIToUTF16(url.scheme() + ":"),
144      elided_url_without_scheme) + ASCIIToUTF16("\n\n");
145
146  message_text += l10n_util::GetStringFUTF16(
147      IDS_EXTERNAL_PROTOCOL_APPLICATION_TO_LAUNCH,
148      elided_command) + ASCIIToUTF16("\n\n");
149
150  message_text += l10n_util::GetStringUTF16(IDS_EXTERNAL_PROTOCOL_WARNING);
151
152  views::MessageBoxView::InitParams params(message_text);
153  params.message_width = kMessageWidth;
154  message_box_view_ = new views::MessageBoxView(params);
155  message_box_view_->SetCheckBoxLabel(
156      l10n_util::GetStringUTF16(IDS_EXTERNAL_PROTOCOL_CHECKBOX_TEXT));
157
158  // Dialog is top level if we don't have a web_contents associated with us.
159  HWND root_hwnd = NULL;
160  if (web_contents_) {
161    root_hwnd = GetAncestor(web_contents_->GetView()->GetContentNativeView(),
162                            GA_ROOT);
163  }
164
165  CreateBrowserModalDialogViews(this, root_hwnd)->Show();
166}
167
168// static
169std::wstring ExternalProtocolDialog::GetApplicationForProtocol(
170    const GURL& url) {
171  // We shouldn't be accessing the registry from the UI thread, since it can go
172  // to disk.  http://crbug.com/61996
173  base::ThreadRestrictions::ScopedAllowIO allow_io;
174
175  std::wstring url_spec = ASCIIToWide(url.possibly_invalid_spec());
176  std::wstring cmd_key_path =
177      ASCIIToWide(url.scheme() + "\\shell\\open\\command");
178  base::win::RegKey cmd_key(HKEY_CLASSES_ROOT, cmd_key_path.c_str(), KEY_READ);
179  size_t split_offset = url_spec.find(L':');
180  if (split_offset == std::wstring::npos)
181    return std::wstring();
182  std::wstring parameters = url_spec.substr(split_offset + 1,
183                                            url_spec.length() - 1);
184  std::wstring application_to_launch;
185  if (cmd_key.ReadValue(NULL, &application_to_launch) == ERROR_SUCCESS) {
186    ReplaceSubstringsAfterOffset(&application_to_launch, 0, L"%1", parameters);
187    return application_to_launch;
188  } else {
189    return std::wstring();
190  }
191}
192