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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 #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
     86