Virtual Cloud Print Driver for Mac.

content/common/chrome_application_mac.mm

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "content/common/chrome_application_mac.h"
+#import "content/common/cloud_print_class_mac.h"
 
 #include "base/logging.h"
+#include "base/mac/foundation_util.h"
 
 @interface CrApplication ()
 - (void)setHandlingSendEvent:(BOOL)handlingSendEvent;
+- (void)setCloudPrintHandler;
+- (void)submitPrint:(NSAppleEventDescriptor*)event;
 @end
 
 @implementation CrApplication
 // Initialize NSApplication using the custom subclass.  Check whether NSApp
 // was already initialized using another class, because that would break
 // some things.
 + (NSApplication*)sharedApplication {
   NSApplication* app = [super sharedApplication];
   if (![NSApp isKindOfClass:self]) {
     LOG(ERROR) << "NSApp should be of type " << [[self className] UTF8String]
                << ", not " << [[NSApp className] UTF8String];
     DCHECK(false) << "NSApp is of wrong type";
   }
   return app;
 }
 
 - (id)init {
   if ((self = [super init])) {
     eventHooks_.reset([[NSMutableArray alloc] init]);
   }
   return self;
 }
 
+// Sets the Cloud Print Handler. Used only by service process.
+- (void)setCloudPrintHandler {
+  NSAppleEventManager* em = [NSAppleEventManager sharedAppleEventManager];
+  LOG(ERROR) << "Setting handler";
+  [em setEventHandler:self
+          andSelector:@selector(submitPrint:)
+        forEventClass:cloud_print_class
+           andEventID:cloud_print_class];
+  LOG(ERROR) << "Successfully Set handler";
+}
+
+// Event handler for Cloud Print Event. Forwards print job recieved to Chrome,
+// launching Chrome if necessary. Used to beat CUPS sandboxing.
+- (void)submitPrint:(NSAppleEventDescriptor*)event {
+  LOG(ERROR) << "In submit print";
+  //TODO: resolve dependency on flag
+  const char silent[]="--no-startup-window";
+  //Set up flag so that it can be passed along with Apple Event
+  CFStringRef silent_launch_flag = CFStringCreateWithCString(
+                                      NULL,silent,kCFStringEncodingUTF8);
+  CFStringRef flags[] = {silent_launch_flag};
+  //Argv array that will be passed
+  CFArrayRef pass_argv = CFArrayCreate(NULL, (const void**) flags, 1,
+                                       &kCFTypeArrayCallBacks);
+  FSRef ref;
+  OSStatus status = noErr;
+  CFURLRef* kDontWantURL = NULL;
+  //Get the bundle ID of Chrome
+  std::string bundleID=  base::mac::BaseBundleID();
+  CFStringRef bundleIDCF = CFStringCreateWithCString(
+                               NULL,bundleID.c_str(),kCFStringEncodingUTF8);
+  //Use Launch Services to locate Chrome using its bundleID
+  status = LSFindApplicationForInfo(kLSUnknownCreator, bundleIDCF,
+                                         NULL, &ref, kDontWantURL);
+
+  if (status != noErr) {
+    LOG(ERROR) <<"Failed to make path ref";
+    LOG(ERROR) << GetMacOSStatusErrorString(status);
+    LOG(ERROR) << GetMacOSStatusCommentString(status);
+  }
+  //Actually create the Apple Event.
+  NSAppleEventDescriptor *send_event = [NSAppleEventDescriptor
+                                        appleEventWithEventClass:
+                                            cloud_print_class
+                                        eventID:cloud_print_class
+                                        targetDescriptor:nil
+                                        returnID:kAutoGenerateReturnID
+                                        transactionID:kAnyTransactionID];
+  //Pull the parameters out of AppleEvent sent to us and attach them
+  // to our Apple Event.
+  NSAppleEventDescriptor *parameters = [event
+                                        paramDescriptorForKeyword:
+                                            cloud_print_class];
+  [send_event setParamDescriptor:parameters forKeyword:cloud_print_class];
+  LSApplicationParameters params = {0, kLSLaunchDefaults , &ref, NULL,
+                                    NULL, pass_argv, NULL};
+  params.initialEvent =(AppleEvent *)  [send_event aeDesc];
+  //Send the Apple Event Using launch services, launching Chrome if necessary.
+  status = LSOpenApplication(&params, NULL);
+
+  if (status != noErr) {
+    LOG(ERROR) <<"Unable to launch";
+    LOG(ERROR) << GetMacOSStatusErrorString(status);
+    LOG(ERROR) << GetMacOSStatusCommentString(status);
+  }
+}
+
+
 - (BOOL)isHandlingSendEvent {
   return handlingSendEvent_;
 }
 
 - (void)setHandlingSendEvent:(BOOL)handlingSendEvent {
   handlingSendEvent_ = handlingSendEvent;
 }
 
 - (void)clearIsHandlingSendEvent {
   [self setHandlingSendEvent:NO];
@@ skipping 11 matching lines @@
   [eventHooks_ addObject:handler];
 }
 
 - (void)removeEventHook:(id<CrApplicationEventHookProtocol>)handler {
   [eventHooks_ removeObject:handler];
 }
 
 @end
 
 namespace chrome_application_mac {
+  CrApplication* var;
 
 ScopedSendingEvent::ScopedSendingEvent()
     : app_(static_cast<CrApplication*>([CrApplication sharedApplication])),
       handling_([app_ isHandlingSendEvent]) {
   [app_ setHandlingSendEvent:YES];
 }
 
 ScopedSendingEvent::~ScopedSendingEvent() {
   [app_ setHandlingSendEvent:handling_];
 }
 
 void RegisterCrApp() {
-  [CrApplication sharedApplication];
+  var = (CrApplication*)[CrApplication sharedApplication];
 }
 
+void setHandler() {
+  [var setCloudPrintHandler];
+}
+
+
 }  // namespace chrome_application_mac