ppapi/shared_impl/dictionary_var.h

   1 // Copyright (c) 2013 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_DICTIONARY_VAR_H_
   6 #define PPAPI_SHARED_IMPL_DICTIONARY_VAR_H_
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/basictypes.h"
  12 #include "base/compiler_specific.h"
  13 #include "ppapi/c/pp_var.h"
  14 #include "ppapi/shared_impl/ppapi_shared_export.h"
  15 #include "ppapi/shared_impl/scoped_pp_var.h"
  16 #include "ppapi/shared_impl/var.h"
  17
  18 namespace ppapi {
  19
  20 class PPAPI_SHARED_EXPORT DictionaryVar : public Var {
  21  public:
  22   typedef std::map<std::string, ScopedPPVar> KeyValueMap;
  23
  24   DictionaryVar();
  25
  26   // Helper function that converts a PP_Var to a DictionaryVar. This will
  27   // return NULL if the PP_Var is not of type PP_VARTYPE_DICTIONARY or the
  28   // dictionary cannot be found from the var tracker.
  29   static DictionaryVar* FromPPVar(const PP_Var& var);
  30
  31   // Var overrides.
  32   virtual DictionaryVar* AsDictionaryVar() OVERRIDE;
  33   virtual PP_VarType GetType() const OVERRIDE;
  34
  35   // The returned PP_Var has had a ref added on behalf of the caller.
  36   PP_Var Get(const PP_Var& key) const;
  37   PP_Bool Set(const PP_Var& key, const PP_Var& value);
  38   void Delete(const PP_Var& key);
  39   PP_Bool HasKey(const PP_Var& key) const;
  40   // The returned PP_Var has had a ref added on behalf of the caller.
  41   PP_Var GetKeys() const;
  42
  43   // Returns false and keeps the dictionary unchanged if |key| is not a valid
  44   // UTF-8 string.
  45   bool SetWithStringKey(const std::string& utf8_key, const PP_Var& value);
  46   void DeleteWithStringKey(const std::string& utf8_key);
  47
  48   const KeyValueMap& key_value_map() const {
  49     return key_value_map_;
  50   }
  51
  52  protected:
  53   virtual ~DictionaryVar();
  54
  55  private:
  56   KeyValueMap key_value_map_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(DictionaryVar);
  59 };
  60
  61 }  // namespace ppapi
  62
  63 #endif  // PPAPI_SHARED_IMPL_DICTIONARY_VAR_H_