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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 #include "chrome/browser/chromeos/login/help_app_launcher.h"
      6 
      7 #include <string>
      8 
      9 #include "base/strings/stringprintf.h"
     10 #include "base/strings/utf_string_conversions.h"
     11 #include "chrome/browser/chromeos/login/helper.h"
     12 #include "chrome/browser/chromeos/profiles/profile_helper.h"
     13 #include "chrome/browser/extensions/extension_service.h"
     14 #include "chrome/grit/generated_resources.h"
     15 #include "chrome/grit/locale_settings.h"
     16 #include "content/public/browser/browser_thread.h"
     17 #include "extensions/browser/extension_system.h"
     18 #include "ui/base/l10n/l10n_util.h"
     19 #include "ui/gfx/rect.h"
     20 #include "ui/gfx/size.h"
     21 
     22 using content::BrowserThread;
     23 
     24 namespace {
     25 
     26 const char kHelpAppFormat[] =
     27     "chrome-extension://honijodknafkokifofgiaalefdiedpko/oobe.html?id=%d";
     28 
     29 }  // namespace
     30 
     31 namespace chromeos {
     32 
     33 ///////////////////////////////////////////////////////////////////////////////
     34 // HelpApp, public:
     35 
     36 HelpAppLauncher::HelpAppLauncher(gfx::NativeWindow parent_window)
     37     : parent_window_(parent_window) {
     38 }
     39 
     40 void HelpAppLauncher::ShowHelpTopic(HelpTopic help_topic_id) {
     41   Profile* profile = ProfileHelper::GetSigninProfile();
     42   ExtensionService* service =
     43       extensions::ExtensionSystem::Get(profile)->extension_service();
     44 
     45   DCHECK(service);
     46   if (!service)
     47     return;
     48 
     49   GURL url(base::StringPrintf(kHelpAppFormat,
     50                               static_cast<int>(help_topic_id)));
     51   // HelpApp component extension presents only in official builds so we can
     52   // show help only when the extensions is installed.
     53   if (service->extensions()->GetByID(url.host()))
     54     ShowHelpTopicDialog(profile, GURL(url));
     55 }
     56 
     57 ///////////////////////////////////////////////////////////////////////////////
     58 // HelpApp, protected:
     59 
     60 HelpAppLauncher::~HelpAppLauncher() {}
     61 
     62 ///////////////////////////////////////////////////////////////////////////////
     63 // HelpApp, private:
     64 
     65 void HelpAppLauncher::ShowHelpTopicDialog(Profile* profile,
     66                                           const GURL& topic_url) {
     67   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
     68   LoginWebDialog* dialog = new LoginWebDialog(
     69       profile,
     70       NULL,
     71       parent_window_,
     72       l10n_util::GetStringUTF16(IDS_LOGIN_OOBE_HELP_DIALOG_TITLE),
     73       topic_url,
     74       LoginWebDialog::STYLE_BUBBLE);
     75   gfx::Rect screen_bounds(chromeos::CalculateScreenBounds(gfx::Size()));
     76   dialog->SetDialogSize(l10n_util::GetLocalizedContentsWidthInPixels(
     77                             IDS_HELP_APP_DIALOG_WIDTH_PIXELS),
     78                         l10n_util::GetLocalizedContentsWidthInPixels(
     79                             IDS_HELP_APP_DIALOG_HEIGHT_PIXELS));
     80   dialog->Show();
     81   // The dialog object will be deleted on dialog close.
     82 }
     83 
     84 }  // namespace chromeos
     85