chrome/service/chrome_service_application_mac.mm

   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 #import "chrome/service/chrome_service_application_mac.h"
   6
   7 #include "base/mac/foundation_util.h"
   8 #include "base/mac/mac_logging.h"
   9 #include "base/strings/sys_string_conversions.h"
  10 #import "chrome/common/cloud_print/cloud_print_class_mac.h"
  11 #include "chrome/common/chrome_switches.h"
  12
  13 @interface ServiceEventHandler : NSObject
  14 + (void)submitPrint:(NSAppleEventDescriptor*)event;
  15 @end
  16
  17 @implementation ServiceEventHandler
  18
  19 // Event handler for Cloud Print Event. Forwards print job received to Chrome,
  20 // launching Chrome if necessary. Used to beat CUPS sandboxing.
  21 + (void)submitPrint:(NSAppleEventDescriptor*)event {
  22   std::string silent = std::string("--") + switches::kNoStartupWindow;
  23   // Set up flag so that it can be passed along with the Apple Event.
  24   base::ScopedCFTypeRef<CFStringRef> silentLaunchFlag(
  25       base::SysUTF8ToCFStringRef(silent));
  26   CFStringRef flags[] = { silentLaunchFlag };
  27   // Argv array that will be passed.
  28   base::ScopedCFTypeRef<CFArrayRef> passArgv(
  29       CFArrayCreate(NULL, (const void**)flags, 1, &kCFTypeArrayCallBacks));
  30   FSRef ref;
  31   // Get Chrome's bundle ID.
  32   std::string bundleID = base::mac::BaseBundleID();
  33   base::ScopedCFTypeRef<CFStringRef> bundleIDCF(
  34       base::SysUTF8ToCFStringRef(bundleID));
  35   // Use Launch Services to locate Chrome using its bundleID.
  36   OSStatus status = LSFindApplicationForInfo(kLSUnknownCreator, bundleIDCF,
  37                                              NULL, &ref, NULL);
  38
  39   if (status != noErr) {
  40     OSSTATUS_LOG(ERROR, status) << "Failed to make path ref";
  41     return;
  42   }
  43   // Actually create the Apple Event.
  44   NSAppleEventDescriptor* sendEvent =
  45       [NSAppleEventDescriptor
  46            appleEventWithEventClass:cloud_print::kAECloudPrintClass
  47                             eventID:cloud_print::kAECloudPrintClass
  48                    targetDescriptor:nil
  49                            returnID:kAutoGenerateReturnID
  50                       transactionID:kAnyTransactionID];
  51   // Pull the parameters out of AppleEvent sent to us and attach them
  52   // to our Apple Event.
  53   NSAppleEventDescriptor* parameters =
  54       [event paramDescriptorForKeyword:cloud_print::kAECloudPrintClass];
  55   [sendEvent setParamDescriptor:parameters
  56                      forKeyword:cloud_print::kAECloudPrintClass];
  57   LSApplicationParameters params = { 0,
  58                                      kLSLaunchDefaults,
  59                                      &ref,
  60                                      NULL,
  61                                      NULL,
  62                                      passArgv,
  63                                      NULL };
  64   AEDesc* initialEvent = const_cast<AEDesc*>([sendEvent aeDesc]);
  65   params.initialEvent = static_cast<AppleEvent*>(initialEvent);
  66   // Send the Apple Event Using launch services, launching Chrome if necessary.
  67   status = LSOpenApplication(&params, NULL);
  68   if (status != noErr) {
  69     OSSTATUS_LOG(ERROR, status) << "Unable to launch";
  70   }
  71 }
  72
  73 @end
  74
  75 namespace chrome_service_mac {
  76
  77 void RegisterServiceEventHandler() {
  78   NSAppleEventManager* em = [NSAppleEventManager sharedAppleEventManager];
  79   [em setEventHandler:[ServiceEventHandler class]
  80           andSelector:@selector(submitPrint:)
  81         forEventClass:cloud_print::kAECloudPrintClass
  82            andEventID:cloud_print::kAECloudPrintClass];
  83 }
  84
  85 }  // namespace chrome_service_mac