ppapi/shared_impl/flash_clipboard_format_registry.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 PPAPI_SHARED_IMPL_FLASH_CLIPBOARD_FORMAT_REGISTRY_H_
   6 #define PPAPI_SHARED_IMPL_FLASH_CLIPBOARD_FORMAT_REGISTRY_H_
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/basictypes.h"
  12 #include "ppapi/c/private/ppb_flash_clipboard.h"
  13 #include "ppapi/shared_impl/ppapi_shared_export.h"
  14
  15 namespace ppapi {
  16
  17 // This class manages custom clipboard formats that can be registered by a user
  18 // of PPB_Flash_Clipboard. It is used by both the plugin and host side
  19 // of the proxy. The host side is the definitive source of which formats
  20 // have been registered but format registration is tracked on the plugin
  21 // side to better handle error cases.
  22 class PPAPI_SHARED_EXPORT FlashClipboardFormatRegistry {
  23  public:
  24   FlashClipboardFormatRegistry();
  25   ~FlashClipboardFormatRegistry();
  26
  27   // Registers a custom format with the given string. The ID of the format is
  28   // returned if registered successfully, otherwise
  29   // PP_FLASH_CLIPBOARD_FORMAT_INVALID is returned. If a format with a
  30   // particular name is already registered, the ID associated with that name
  31   // will be returned. The format name is checked for validity.
  32   uint32_t RegisterFormat(const std::string& format_name);
  33
  34   // This sets the name of a particular format in the registry. This is only
  35   // used on the plugin side in order to track format IDs that are returned
  36   // by the host.
  37   void SetRegisteredFormat(const std::string& format_name, uint32_t format);
  38
  39   // Checks whether the given custom format ID has been registered.
  40   bool IsFormatRegistered(uint32_t format) const;
  41
  42   // Returns the name of a particular format.
  43   std::string GetFormatName(uint32_t format) const;
  44
  45   // Gets the ID of a particular format name that has already been registered.
  46   // PP_FLASH_CLIPBOARD_FORMAT_INVALID is returned if the format has not been
  47   // registered.
  48   uint32_t GetFormatID(const std::string& format_name) const;
  49
  50   // Returns whether the given clipboard format is a valid predefined format
  51   // (i.e. one defined in the PP_Flash_Clipboard_Format enum).
  52   static bool IsValidPredefinedFormat(uint32_t format);
  53
  54  private:
  55   // A map of custom format ID to format name.
  56   typedef std::map<uint32_t, std::string> FormatMap;
  57   FormatMap custom_formats_;
  58
  59   DISALLOW_COPY_AND_ASSIGN(FlashClipboardFormatRegistry);
  60 };
  61
  62 }  // ppapi
  63
  64 #endif  // PPAPI_SHARED_IMPL_FLASH_CLIPBOARD_FORMAT_REGISTRY_H_