chrome/service/cloud_print/print_system.h

   1 // Copyright (c) 2012 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_SERVICE_CLOUD_PRINT_PRINT_SYSTEM_H_
   6 #define CHROME_SERVICE_CLOUD_PRINT_PRINT_SYSTEM_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/callback.h"
  13 #include "base/memory/ref_counted.h"
  14 #include "printing/backend/print_backend.h"
  15
  16 namespace base {
  17 class DictionaryValue;
  18 class FilePath;
  19 }
  20
  21 namespace printing {
  22 struct PrinterBasicInfo;
  23 struct PrinterCapsAndDefaults;
  24 }
  25
  26 // This is the interface for platform-specific code for cloud print
  27 namespace cloud_print {
  28
  29 typedef int PlatformJobId;
  30
  31 enum PrintJobStatus {
  32   PRINT_JOB_STATUS_INVALID,
  33   PRINT_JOB_STATUS_IN_PROGRESS,
  34   PRINT_JOB_STATUS_ERROR,
  35   PRINT_JOB_STATUS_COMPLETED,
  36   PRINT_JOB_STATUS_MAX,
  37 };
  38
  39 struct PrintJobDetails {
  40   PrintJobDetails();
  41
  42   void Clear();
  43
  44   bool operator ==(const PrintJobDetails& other) const {
  45     return (status == other.status) &&
  46            (platform_status_flags == other.platform_status_flags) &&
  47            (status_message == other.status_message) &&
  48            (total_pages == other.total_pages) &&
  49            (pages_printed == other.pages_printed);
  50   }
  51
  52   bool operator !=(const PrintJobDetails& other) const {
  53     return !(*this == other);
  54   }
  55
  56   PrintJobStatus status;
  57   int platform_status_flags;
  58   std::string status_message;
  59   int total_pages;
  60   int pages_printed;
  61 };
  62
  63 // PrintSystem class will provide interface for different printing systems
  64 // (Windows, CUPS) to implement. User will call CreateInstance() to
  65 // obtain available printing system.
  66 // Please note, that PrintSystem is not platform specific, but rather
  67 // print system specific. For example, CUPS is available on both Linux and Mac,
  68 // but not available on ChromeOS, etc. This design allows us to add more
  69 // functionality on some platforms, while reusing core (CUPS) functions.
  70 class PrintSystem : public base::RefCountedThreadSafe<PrintSystem> {
  71  public:
  72   class PrintServerWatcher
  73       : public base::RefCountedThreadSafe<PrintServerWatcher> {
  74    public:
  75     // Callback interface for new printer notifications.
  76     class Delegate {
  77       public:
  78         virtual void OnPrinterAdded() = 0;
  79         // TODO(gene): Do we need OnPrinterDeleted notification here?
  80
  81       protected:
  82         virtual ~Delegate() {}
  83     };
  84
  85     virtual bool StartWatching(PrintServerWatcher::Delegate* delegate) = 0;
  86     virtual bool StopWatching() = 0;
  87
  88    protected:
  89     friend class base::RefCountedThreadSafe<PrintServerWatcher>;
  90     virtual ~PrintServerWatcher();
  91   };
  92
  93   class PrinterWatcher : public base::RefCountedThreadSafe<PrinterWatcher> {
  94    public:
  95     // Callback interface for printer updates notifications.
  96     class Delegate {
  97       public:
  98         virtual void OnPrinterDeleted() = 0;
  99         virtual void OnPrinterChanged() = 0;
 100         virtual void OnJobChanged() = 0;
 101
 102       protected:
 103         virtual ~Delegate() {}
 104     };
 105
 106     virtual bool StartWatching(PrinterWatcher::Delegate* delegate) = 0;
 107     virtual bool StopWatching() = 0;
 108     virtual bool GetCurrentPrinterInfo(
 109         printing::PrinterBasicInfo* printer_info) = 0;
 110
 111    protected:
 112     friend class base::RefCountedThreadSafe<PrinterWatcher>;
 113     virtual ~PrinterWatcher();
 114   };
 115
 116   class JobSpooler : public base::RefCountedThreadSafe<JobSpooler> {
 117    public:
 118     // Callback interface for JobSpooler notifications.
 119     class Delegate {
 120      public:
 121       virtual void OnJobSpoolSucceeded(const PlatformJobId& job_id) = 0;
 122       virtual void OnJobSpoolFailed() = 0;
 123
 124      protected:
 125       virtual ~Delegate() {}
 126     };
 127
 128     // Spool job to the printer asynchronously. Caller will be notified via
 129     // |delegate|. Note that only one print job can be in progress at any given
 130     // time. Subsequent calls to Spool (before the Delegate::OnJobSpoolSucceeded
 131     // or Delegate::OnJobSpoolFailed methods are called) can fail.
 132     virtual bool Spool(const std::string& print_ticket,
 133                        const base::FilePath& print_data_file_path,
 134                        const std::string& print_data_mime_type,
 135                        const std::string& printer_name,
 136                        const std::string& job_title,
 137                        const std::vector<std::string>& tags,
 138                        JobSpooler::Delegate* delegate) = 0;
 139    protected:
 140     friend class base::RefCountedThreadSafe<JobSpooler>;
 141     virtual ~JobSpooler();
 142   };
 143
 144   class PrintSystemResult {
 145    public:
 146     PrintSystemResult(bool succeeded, const std::string& message)
 147         : succeeded_(succeeded), message_(message) { }
 148     bool succeeded() const { return succeeded_; }
 149     std::string message() const { return message_; }
 150
 151    private:
 152     PrintSystemResult() {}
 153
 154     bool succeeded_;
 155     std::string message_;
 156   };
 157
 158   typedef base::Callback<void(bool,
 159                               const std::string&,
 160                               const printing::PrinterCapsAndDefaults&)>
 161       PrinterCapsAndDefaultsCallback;
 162
 163   // Initialize print system. This need to be called before any other function
 164   // of PrintSystem.
 165   virtual PrintSystemResult Init() = 0;
 166
 167   // Enumerates the list of installed local and network printers.
 168   virtual PrintSystemResult EnumeratePrinters(
 169       printing::PrinterList* printer_list) = 0;
 170
 171   // Gets the capabilities and defaults for a specific printer asynchronously.
 172   virtual void GetPrinterCapsAndDefaults(
 173       const std::string& printer_name,
 174       const PrinterCapsAndDefaultsCallback& callback) = 0;
 175
 176   // Returns true if printer_name points to a valid printer.
 177   virtual bool IsValidPrinter(const std::string& printer_name) = 0;
 178
 179   // Returns true if ticket is valid.
 180   virtual bool ValidatePrintTicket(const std::string& printer_name,
 181                                    const std::string& print_ticket_data) = 0;
 182
 183   // Get details for already spooled job.
 184   virtual bool GetJobDetails(const std::string& printer_name,
 185                              PlatformJobId job_id,
 186                              PrintJobDetails* job_details) = 0;
 187
 188   // Factory methods to create corresponding watcher. Callee is responsible
 189   // for deleting objects. Return NULL if failed.
 190   virtual PrintServerWatcher* CreatePrintServerWatcher() = 0;
 191   virtual PrinterWatcher* CreatePrinterWatcher(
 192       const std::string& printer_name) = 0;
 193   virtual JobSpooler* CreateJobSpooler() = 0;
 194
 195   // Returns a comma separated list of mimetypes for print data that are
 196   // supported by this print system. The format of this string is the same as
 197   // that used for the HTTP Accept: header.
 198   virtual std::string GetSupportedMimeTypes() = 0;
 199
 200   // Generate unique for proxy.
 201   static std::string GenerateProxyId();
 202
 203   // Call this function to obtain printing system for specified print server.
 204   // If print settings are NULL, default settings will be used.
 205   // Return NULL if no print system available.
 206   static scoped_refptr<PrintSystem> CreateInstance(
 207       const base::DictionaryValue* print_system_settings);
 208
 209  protected:
 210   friend class base::RefCountedThreadSafe<PrintSystem>;
 211   virtual ~PrintSystem();
 212 };
 213
 214 }  // namespace cloud_print
 215
 216 #endif  // CHROME_SERVICE_CLOUD_PRINT_PRINT_SYSTEM_H_