chrome/browser/printing/print_job_worker_owner.h

   1 // Copyright (c) 2011 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 #ifndef CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_OWNER_H__
   6 #define CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_OWNER_H__
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "printing/printing_context.h"
  10
  11 namespace base {
  12 class MessageLoop;
  13 class SequencedTaskRunner;
  14 }
  15
  16 namespace tracked_objects {
  17 class Location;
  18 }
  19
  20 namespace printing {
  21
  22 class PrintJobWorker;
  23 class PrintSettings;
  24
  25 class PrintJobWorkerOwner
  26     : public base::RefCountedThreadSafe<PrintJobWorkerOwner> {
  27  public:
  28   PrintJobWorkerOwner();
  29
  30   // Finishes the initialization began by PrintJobWorker::GetSettings().
  31   // Creates a new PrintedDocument if necessary. Solely meant to be called by
  32   // PrintJobWorker.
  33   virtual void GetSettingsDone(const PrintSettings& new_settings,
  34                                PrintingContext::Result result) = 0;
  35
  36   // Detach the PrintJobWorker associated to this object.
  37   virtual PrintJobWorker* DetachWorker(PrintJobWorkerOwner* new_owner) = 0;
  38
  39   // Access the current settings.
  40   virtual const PrintSettings& settings() const = 0;
  41
  42   // Cookie uniquely identifying the PrintedDocument and/or loaded settings.
  43   virtual int cookie() const = 0;
  44
  45   // Returns true if the current thread is a thread on which a task
  46   // may be run, and false if no task will be run on the current
  47   // thread.
  48   bool RunsTasksOnCurrentThread() const;
  49
  50   // Posts the given task to be run.
  51   bool PostTask(const tracked_objects::Location& from_here,
  52                 const base::Closure& task);
  53
  54  protected:
  55   friend class base::RefCountedThreadSafe<PrintJobWorkerOwner>;
  56
  57   virtual ~PrintJobWorkerOwner();
  58
  59   // Task runner reference. Used to send notifications in the right
  60   // thread.
  61   scoped_refptr<base::SequencedTaskRunner> task_runner_;
  62 };
  63
  64 }  // namespace printing
  65
  66 #endif  // CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_OWNER_H__