chrome/browser/ui/views/external_protocol_dialog.cc

   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
  25 using content::WebContents;
  26
  27 namespace {
  28
  29 const int kMessageWidth = 400;
  30
  31 }  // namespace
  32
  33 ///////////////////////////////////////////////////////////////////////////////
  34 // ExternalProtocolHandler
  35
  36 // static
  37 void 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   // Windowing system takes ownership.
  46   new ExternalProtocolDialog(url, render_process_host_id, routing_id, command);
  47 }
  48
  49 ///////////////////////////////////////////////////////////////////////////////
  50 // ExternalProtocolDialog
  51
  52 ExternalProtocolDialog::~ExternalProtocolDialog() {
  53 }
  54
  55 //////////////////////////////////////////////////////////////////////////////
  56 // ExternalProtocolDialog, views::DialogDelegate implementation:
  57
  58 int ExternalProtocolDialog::GetDefaultDialogButton() const {
  59   return ui::DIALOG_BUTTON_CANCEL;
  60 }
  61
  62 base::string16 ExternalProtocolDialog::GetDialogButtonLabel(
  63     ui::DialogButton button) const {
  64   if (button == ui::DIALOG_BUTTON_OK)
  65     return l10n_util::GetStringUTF16(IDS_EXTERNAL_PROTOCOL_OK_BUTTON_TEXT);
  66   else
  67     return l10n_util::GetStringUTF16(IDS_EXTERNAL_PROTOCOL_CANCEL_BUTTON_TEXT);
  68 }
  69
  70 base::string16 ExternalProtocolDialog::GetWindowTitle() const {
  71   return l10n_util::GetStringUTF16(IDS_EXTERNAL_PROTOCOL_TITLE);
  72 }
  73
  74 void ExternalProtocolDialog::DeleteDelegate() {
  75   delete this;
  76 }
  77
  78 bool ExternalProtocolDialog::Cancel() {
  79   // We also get called back here if the user closes the dialog or presses
  80   // escape. In these cases it would be preferable to ignore the state of the
  81   // check box but MessageBox doesn't distinguish this from pressing the cancel
  82   // button.
  83   if (message_box_view_->IsCheckBoxSelected()) {
  84     ExternalProtocolHandler::SetBlockState(
  85         url_.scheme(), ExternalProtocolHandler::BLOCK);
  86   }
  87
  88   // Returning true closes the dialog.
  89   return true;
  90 }
  91
  92 bool ExternalProtocolDialog::Accept() {
  93   // We record how long it takes the user to accept an external protocol.  If
  94   // users start accepting these dialogs too quickly, we should worry about
  95   // clickjacking.
  96   UMA_HISTOGRAM_LONG_TIMES("clickjacking.launch_url",
  97                            base::TimeTicks::Now() - creation_time_);
  98
  99   if (message_box_view_->IsCheckBoxSelected()) {
 100     ExternalProtocolHandler::SetBlockState(
 101         url_.scheme(), ExternalProtocolHandler::DONT_BLOCK);
 102   }
 103
 104   ExternalProtocolHandler::LaunchUrlWithoutSecurityCheck(
 105       url_, render_process_host_id_, routing_id_);
 106   // Returning true closes the dialog.
 107   return true;
 108 }
 109
 110 views::View* ExternalProtocolDialog::GetContentsView() {
 111   return message_box_view_;
 112 }
 113
 114 views::Widget* ExternalProtocolDialog::GetWidget() {
 115   return message_box_view_->GetWidget();
 116 }
 117
 118 const views::Widget* ExternalProtocolDialog::GetWidget() const {
 119   return message_box_view_->GetWidget();
 120 }
 121
 122 ///////////////////////////////////////////////////////////////////////////////
 123 // ExternalProtocolDialog, private:
 124
 125 ExternalProtocolDialog::ExternalProtocolDialog(const GURL& url,
 126                                                int render_process_host_id,
 127                                                int routing_id,
 128                                                const std::wstring& command)
 129     : url_(url),
 130       render_process_host_id_(render_process_host_id),
 131       routing_id_(routing_id),
 132       creation_time_(base::TimeTicks::Now()) {
 133   const int kMaxUrlWithoutSchemeSize = 256;
 134   const int kMaxCommandSize = 256;
 135   base::string16 elided_url_without_scheme;
 136   base::string16 elided_command;
 137   gfx::ElideString(base::ASCIIToUTF16(url.possibly_invalid_spec()),
 138                    kMaxUrlWithoutSchemeSize, &elided_url_without_scheme);
 139   gfx::ElideString(base::WideToUTF16Hack(command),
 140                    kMaxCommandSize, &elided_command);
 141
 142   base::string16 message_text = l10n_util::GetStringFUTF16(
 143       IDS_EXTERNAL_PROTOCOL_INFORMATION,
 144       base::ASCIIToUTF16(url.scheme() + ":"),
 145       elided_url_without_scheme) + base::ASCIIToUTF16("\n\n");
 146
 147   message_text += l10n_util::GetStringFUTF16(
 148       IDS_EXTERNAL_PROTOCOL_APPLICATION_TO_LAUNCH,
 149       elided_command) + base::ASCIIToUTF16("\n\n");
 150
 151   message_text += l10n_util::GetStringUTF16(IDS_EXTERNAL_PROTOCOL_WARNING);
 152
 153   views::MessageBoxView::InitParams params(message_text);
 154   params.message_width = kMessageWidth;
 155   message_box_view_ = new views::MessageBoxView(params);
 156   message_box_view_->SetCheckBoxLabel(
 157       l10n_util::GetStringUTF16(IDS_EXTERNAL_PROTOCOL_CHECKBOX_TEXT));
 158
 159   // Dialog is top level if we don't have a web_contents associated with us.
 160   WebContents* web_contents = tab_util::GetWebContentsByID(
 161       render_process_host_id_, routing_id_);
 162   gfx::NativeWindow parent_window = NULL;
 163   if (web_contents)
 164     parent_window = web_contents->GetView()->GetTopLevelNativeWindow();
 165   CreateBrowserModalDialogViews(this, parent_window)->Show();
 166 }
 167
 168 // static
 169 std::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 = base::ASCIIToWide(url.possibly_invalid_spec());
 176   std::wstring cmd_key_path =
 177       base::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 }