[CUPS] Implement the Print Job notification.

chrome/browser/chromeos/printing/cups_print_job_manager.h

+// Copyright 2016 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_CHROMEOS_PRINTING_CUPS_PRINT_JOB_MANAGER_H_
+#define CHROME_BROWSER_CHROMEOS_PRINTING_CUPS_PRINT_JOB_MANAGER_H_
+
+#include <vector>
+
+#include "chrome/browser/chromeos/printing/cups_print_job.h"
+#include "components/keyed_service/core/keyed_service.h"
+
+class Profile;
+
+namespace content {
+class BrowserContext;
+}
+
+namespace chromeos {
+
+class CupsPrintJobNotificationManager;
+
+class CupsPrintJobManager : public KeyedService {
+ public:
+  class Observer {
+   public:
+    virtual void OnPrintJobCreated(CupsPrintJob* job) {}
+    virtual void OnPrintJobStarted(CupsPrintJob* job) {}
+    virtual void OnPrintJobUpdated(CupsPrintJob* job) {}
+    virtual void OnPrintJobSuspended(CupsPrintJob* job) {}
+    virtual void OnPrintJobResumed(CupsPrintJob* job) {}
+    virtual void OnPrintJobDone(CupsPrintJob* job) {}
+    virtual void OnPrintJobError(CupsPrintJob* job) {}
+    virtual void OnPrintJobCancelled(int job_id) {}
+
+   protected:
+    virtual ~Observer() {}
+  };
+
+  using PrintJobs = std::vector<std::unique_ptr<CupsPrintJob>>;
+
+  explicit CupsPrintJobManager(Profile* profile);
+  ~CupsPrintJobManager() override;
+
+  // KeyedService override:
+  void Shutdown() override;
+
+  // Returns the CupsPrintJobManager instance that associated with the current
+  // profile.
+  static CupsPrintJobManager* Get(content::BrowserContext* browser_context);
+
+  virtual bool CreatePrintJob(const std::string& printer_name,
+                              const std::string& title,
+                              int total_page_number) = 0;
+  // Cancel a print job |job|. Note the |job| will be deleted after cancelled.
+  virtual bool CancelPrintJob(CupsPrintJob* job) = 0;
+  virtual bool SuspendPrintJob(CupsPrintJob* job) = 0;
+  virtual bool ResumePrintJob(CupsPrintJob* job) = 0;
+
+  void AddObserver(Observer* observer);
+  void RemoveObserver(Observer* observer);
+
+ protected:
+  PrintJobs print_jobs_;
+  Profile* profile_;
+  std::unique_ptr<CupsPrintJobNotificationManager> notification_manager_;
+  std::vector<Observer*> observers_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(CupsPrintJobManager);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_PRINTING_CUPS_PRINT_JOB_MANAGER_H_