chrome/browser/chromeos/dbus/printer_service_provider.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/chromeos/dbus/printer_service_provider.h"
   6
   7 #include "ash/session/session_state_delegate.h"
   8 #include "ash/shell.h"
   9 #include "ash/wm/window_util.h"
  10 #include "base/bind.h"
  11 #include "base/bind_helpers.h"
  12 #include "base/metrics/histogram.h"
  13 #include "base/strings/stringprintf.h"
  14 #include "base/sys_info.h"
  15 #include "chrome/browser/profiles/profile_manager.h"
  16 #include "chrome/browser/ui/browser.h"
  17 #include "chrome/browser/ui/browser_tabstrip.h"
  18 #include "chrome/browser/ui/browser_window.h"
  19 #include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
  20 #include "chrome/browser/ui/tab_contents/tab_contents_iterator.h"
  21 #include "chrome/browser/ui/tabs/tab_strip_model.h"
  22 #include "chrome/common/chrome_version_info.h"
  23 #include "content/public/browser/browser_thread.h"
  24 #include "content/public/browser/web_contents.h"
  25 #include "dbus/bus.h"
  26 #include "dbus/exported_object.h"
  27 #include "dbus/message.h"
  28 #include "net/base/escape.h"
  29 #include "third_party/cros_system_api/dbus/service_constants.h"
  30 #include "ui/aura/window.h"
  31
  32 namespace {
  33
  34 const char kPrinterAdded[] = "PrinterAdded";
  35
  36 enum PrinterServiceEvent {
  37   PRINTER_ADDED,
  38   PAGE_DISPLAYED,
  39   PRINTER_SERVICE_EVENT_MAX,
  40 };
  41
  42 // TODO(vitalybuka): update URL with more relevant information.
  43 const char kCloudPrintLearnUrl[] =
  44     "https://www.google.com/landing/cloudprint/index.html";
  45
  46 void ActivateContents(Browser* browser, content::WebContents* contents) {
  47   browser->tab_strip_model()->ActivateTabAt(
  48       browser->tab_strip_model()->GetIndexOfWebContents(contents), false);
  49 }
  50
  51 Browser* ActivateAndGetBrowserForUrl(GURL url) {
  52   for (TabContentsIterator it; !it.done(); it.Next()) {
  53     if (it->GetLastCommittedURL() == url) {
  54       ActivateContents(it.browser(), *it);
  55       return it.browser();
  56     }
  57   }
  58   return NULL;
  59 }
  60
  61 void FindOrOpenCloudPrintPage(const std::string& /* vendor */,
  62                               const std::string& /* product */) {
  63   UMA_HISTOGRAM_ENUMERATION("PrinterService.PrinterServiceEvent", PRINTER_ADDED,
  64                             PRINTER_SERVICE_EVENT_MAX);
  65   if (!ash::Shell::GetInstance()->session_state_delegate()->
  66           IsActiveUserSessionStarted() ||
  67       ash::Shell::GetInstance()->session_state_delegate()->IsScreenLocked()) {
  68     return;
  69   }
  70
  71   Profile* profile = ProfileManager::GetLastUsedProfile();
  72   if (!profile)
  73     return;
  74
  75   GURL url(kCloudPrintLearnUrl);
  76
  77   if (!ActivateAndGetBrowserForUrl(url)) {
  78     chrome::ScopedTabbedBrowserDisplayer displayer(
  79         profile, chrome::HOST_DESKTOP_TYPE_ASH);
  80     UMA_HISTOGRAM_ENUMERATION("PrinterService.PrinterServiceEvent",
  81                               PAGE_DISPLAYED, PRINTER_SERVICE_EVENT_MAX);
  82     chrome::AddSelectedTabWithURL(displayer.browser(), url,
  83                                   ui::PAGE_TRANSITION_LINK);
  84   }
  85 }
  86
  87 }  // namespace
  88
  89 namespace chromeos {
  90
  91 PrinterServiceProvider::PrinterServiceProvider()
  92     : weak_ptr_factory_(this) {
  93 }
  94
  95 PrinterServiceProvider::~PrinterServiceProvider() {
  96 }
  97
  98 void PrinterServiceProvider::Start(
  99     scoped_refptr<dbus::ExportedObject> exported_object) {
 100   exported_object_ = exported_object;
 101
 102   DVLOG(1) << "PrinterServiceProvider started";
 103   exported_object_->ExportMethod(
 104       kLibCrosServiceInterface,
 105       kPrinterAdded,
 106       base::Bind(&PrinterServiceProvider::PrinterAdded,
 107                  weak_ptr_factory_.GetWeakPtr()),
 108       base::Bind(&PrinterServiceProvider::OnExported,
 109                  weak_ptr_factory_.GetWeakPtr()));
 110 }
 111
 112 void PrinterServiceProvider::OnExported(
 113     const std::string& interface_name,
 114     const std::string& method_name,
 115     bool success) {
 116   if (!success) {
 117     LOG(ERROR) << "Failed to export " << interface_name << "."
 118                << method_name;
 119   }
 120   DVLOG(1) << "Method exported: " << interface_name << "." << method_name;
 121 }
 122
 123 void PrinterServiceProvider::ShowCloudPrintHelp(const std::string& vendor,
 124                                                 const std::string& product) {
 125   content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
 126                                    base::Bind(&FindOrOpenCloudPrintPage, vendor,
 127                                               product));
 128 }
 129
 130 void PrinterServiceProvider::PrinterAdded(
 131     dbus::MethodCall* method_call,
 132     dbus::ExportedObject::ResponseSender response_sender) {
 133   DVLOG(1) << "PrinterAdded " << method_call->ToString();
 134
 135   // Disable showing Cloudprint help on canary and dev channel, as these have
 136   // support for printerProvider API.
 137   // TODO(tbarzic): Remove this and offer the user to search for an extension
 138   // that can act as a print driver (using printerProvider API) for USB printers
 139   // detected by this service. http://crbug.com/439448
 140   if (base::SysInfo::IsRunningOnChromeOS() &&
 141       chrome::VersionInfo::GetChannel() <= chrome::VersionInfo::CHANNEL_DEV)
 142     return;
 143
 144   dbus::MessageReader reader(method_call);
 145   std::string vendor;
 146   std::string product;
 147   // Don't check for error, parameters are optional. If some string is empty
 148   // web server will show generic help page.
 149   reader.PopString(&vendor);
 150   reader.PopString(&product);
 151   ShowCloudPrintHelp(vendor, product);
 152
 153   // Send an empty response.
 154   response_sender.Run(dbus::Response::FromMethodCall(method_call));
 155 }
 156
 157 }  // namespace chromeos
 158