Print support for Windows Metro...

chrome/browser/printing/print_job_manager.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_PRINTING_PRINT_JOB_MANAGER_H_
 #define CHROME_BROWSER_PRINTING_PRINT_JOB_MANAGER_H_
 #pragma once
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
 #include "chrome/browser/prefs/pref_member.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
+#include "printing/print_destination_interface.h"
 
 class PrefService;
 
 namespace printing {
 
 class JobEventDetails;
 class PrintJob;
 class PrinterQuery;
 
 class PrintJobManager : public content::NotificationObserver {
  public:
   PrintJobManager();
   virtual ~PrintJobManager();
 
   // Registers for changes to the printing enabled preference in |prefs|.
   // This method should be called on the UI thread.
   void InitOnUIThread(PrefService* prefs);
 
   // On browser quit, we should wait to have the print job finished.
   void OnQuit();
 
   // Stops all printing jobs. If wait_for_finish is true, tries to give jobs
   // a chance to complete before stopping them.
   void StopJobs(bool wait_for_finish);
 
+  // Sets the print destination to be set on the next print job. The value is
+  // automatically reset to NULL when the JOB_DONE event is received.

[robertshield, 2012/06/28 17:48:54]

The last sentence describes implementation, not interface. Should remove from
here.

[MAD, 2012/06/28 19:05:51]

Good point, I thought the caller might need to know when the value is reset, but
I guess now, as long as we know it's just for the NEXT print job, it's fine...

Done!

+  void SetPrintDestination(PrintDestinationInterface* destination);
+
   // Queues a semi-initialized worker thread. Can be called from any thread.
   // Current use case is queuing from the I/O thread.
   // TODO(maruel):  Have them vanish after a timeout (~5 minutes?)
   void QueuePrinterQuery(PrinterQuery* job);
 
   // Pops a queued PrintJobWorkerOwner object that was previously queued. Can be
   // called from any thread. Current use case is poping from the browser thread.
   void PopPrinterQuery(int document_cookie, scoped_refptr<PrinterQuery>* job);
 
   static void RegisterPrefs(PrefService* prefs);
 
   // content::NotificationObserver
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // Only accessed on the IO thread. UI thread can query
   // prefs::kPrintingEnabled via g_browser_process->local_state() directly.
   bool printing_enabled() const;
 
+  PrintDestinationInterface* destination() const { return destination_.get(); }

[robertshield, 2012/06/28 17:48:54]

Mention here that this may return NULL.

[MAD, 2012/06/28 19:05:51]

Done.

+
  private:
   typedef std::vector<scoped_refptr<PrintJob> > PrintJobs;
   typedef std::vector<scoped_refptr<PrinterQuery> > PrinterQueries;
 
   // Processes a NOTIFY_PRINT_JOB_EVENT notification.
   void OnPrintJobEvent(PrintJob* print_job,
                        const JobEventDetails& event_details);
 
   content::NotificationRegistrar registrar_;
 
   // Printing is enabled/disabled. For printing with the native print dialog,
   // this variable is checked at only one place, by
   // PrintingMessageFilter::OnGetDefaultPrintSettings. If its value is true
   // at that point, then the initiated print flow will complete itself,
   // even if the value of this variable changes afterwards.
   // In the print preview workflow, this variable is checked in
   // PrintingMessageFilter::OnUpdatePrintSettings, which gets called multiple
   // times in the print preview workflow.
   BooleanPrefMember printing_enabled_;
 
   // Used to serialize access to queued_workers_.
   base::Lock lock_;
 
   PrinterQueries queued_queries_;
 
+  scoped_refptr<PrintDestinationInterface> destination_;
+
   // Current print jobs that are active.
   PrintJobs current_jobs_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintJobManager);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_BROWSER_PRINTING_PRINT_JOB_MANAGER_H_