Virtual Cloud Print Driver for Mac.

cloud_print/virtual_driver/posix/printer_driver_util_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.
+
+#include "cloud_print/virtual_driver/posix/printer_driver_util_posix.h"
+
+#import <ApplicationServices/ApplicationServices.h>
+#import <CoreServices/CoreServices.h>
+#import <Foundation/NSAutoreleasePool.h>
+#import <Foundation/NSAppleEventDescriptor.h>
+#import <ScriptingBridge/SBApplication.h>
+
+#include "base/logging.h"
+#include "base/mac/foundation_util.h"
+
+#include <cups/backend.h>
+
+#include <stdlib.h>
+#include <string>
+
+// Duplicated is content/common/cloud_print_class_mac.h
+const AEEventClass kAECloudPrintClass = 'GCPp';
+
+namespace cloud_print {
+// Checks to see whether the browser process, whose bundle ID
+// is specified by bundle ID, is running.
+bool IsBrowserRunning(std::string bundleID) {
+  SBApplication* app = [SBApplication applicationWithBundleIdentifier:
+                           [NSString stringWithUTF8String:bundleID.c_str()]];
+  if ([app isRunning]) {
+    return true;
+  }
+  return false;
+}
+}   // namespace cloud_print
+
+void LaunchPrintDialog(const std::string& outputPath,
+                       const std::string& jobTitle,
+                       const std::string& user) {
+  NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+  OSStatus status = noErr;
+  FSRef ref;
+  // Get the bundleID of the browser.
+  std::string bundleID =  base::mac::BaseBundleID();
+  // If the browser is running, send the event to it.
+  // Otherwise, send the event to the service process.
+  if (!cloud_print::IsBrowserRunning(bundleID)) {
+    // Generate the bundle ID for the Service process.
+    bundleID = bundleID + ".helper";
+  }
+  CFStringRef bundleIDCF = CFStringCreateWithCString(
+                               NULL,
+                               bundleID.c_str(),
+                               kCFStringEncodingUTF8);
+  CFURLRef* kDontWantURL = NULL;
+  // Locate the service process with the help of the bundle ID.
+  status = LSFindApplicationForInfo(kLSUnknownCreator, bundleIDCF,
+                                    NULL, &ref, kDontWantURL);
+
+  if (status != noErr) {
+    LOG(ERROR) << "Couldn't locate the process to send Apple Event";
+    exit(CUPS_BACKEND_CANCEL);
+  }
+
+  // Create the actual Apple Event.
+  NSAppleEventDescriptor* event =
+      [NSAppleEventDescriptor appleEventWithEventClass:kAECloudPrintClass
+                                               eventID:kAECloudPrintClass
+                                      targetDescriptor:nil
+                                              returnID:kAutoGenerateReturnID
+                                         transactionID:kAnyTransactionID];
+
+  if(event == nil) {
+    LOG(ERROR) << "Unable to Create Event";
+    exit(CUPS_BACKEND_CANCEL);
+  }
+
+  // Create the AppleEvent parameters.
+  NSAppleEventDescriptor* printPath =
+      [NSAppleEventDescriptor descriptorWithString:
+          [NSString stringWithUTF8String:outputPath.c_str()]];
+  NSAppleEventDescriptor* title =
+      [NSAppleEventDescriptor descriptorWithString:
+          [NSString stringWithUTF8String:jobTitle.c_str()]];
+  NSAppleEventDescriptor* mime = [NSAppleEventDescriptor
+                                  descriptorWithString:@"application/pdf"];
+
+  // Create and populate the list of parameters.
+  // Note that the array starts at index 1.
+  NSAppleEventDescriptor* parameters = [NSAppleEventDescriptor listDescriptor];
+
+  if(parameters == nil) {
+    LOG(ERROR) << "Unable to Create Paramters";
+    exit(CUPS_BACKEND_CANCEL);
+  }
+
+  [parameters insertDescriptor:mime atIndex:1];
+  [parameters insertDescriptor:printPath atIndex:2];
+  [parameters insertDescriptor:title atIndex:3];
+  [event setParamDescriptor:parameters forKeyword:kAECloudPrintClass];
+
+  // Set the application launch parameters.
+  // We are just using launch services to deliver our Apple Event.
+  LSApplicationParameters params = {
+      0, kLSLaunchDefaults , &ref, NULL, NULL, NULL, NULL };
+
+  AEDesc* initialEvent = const_cast<AEDesc*> ([event aeDesc]);
+  params.initialEvent = static_cast<AppleEvent*> (initialEvent);
+  // Deliver the Apple Event using launch services.
+  status = LSOpenApplication(&params, NULL);
+  if (status != noErr) {
+    LOG(ERROR) << "Unable to launch";
+    LOG(ERROR) << GetMacOSStatusErrorString(status);
+    LOG(ERROR) << GetMacOSStatusCommentString(status);
+    exit(CUPS_BACKEND_CANCEL);
+  }
+
+  [pool release];
+  return;
+}