Add PPB_VarDictionary_Dev support - part 1.

ppapi/shared_impl/dictionary_var.cc

+// Copyright (c) 2013 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.
+
+#include "ppapi/shared_impl/dictionary_var.h"
+
+#include "base/memory/ref_counted.h"
+#include "base/string_util.h"
+#include "ppapi/shared_impl/ppapi_globals.h"
+#include "ppapi/shared_impl/var_tracker.h"
+
+namespace ppapi {
+
+DictionaryVar::DictionaryVar() {
+}
+
+DictionaryVar::~DictionaryVar() {
+}
+
+// static
+DictionaryVar* DictionaryVar::FromPPVar(const PP_Var& var) {
+  if (var.type != PP_VARTYPE_DICTIONARY)
+    return NULL;
+
+  scoped_refptr<Var> var_object(
+      PpapiGlobals::Get()->GetVarTracker()->GetVar(var));
+  if (!var_object.get())
+    return NULL;
+  return var_object->AsDictionaryVar();
+}
+
+DictionaryVar* DictionaryVar::AsDictionaryVar() {
+  return this;
+}
+
+PP_VarType DictionaryVar::GetType() const {
+  return PP_VARTYPE_DICTIONARY;
+}
+
+PP_Var DictionaryVar::Get(const PP_Var& key) const {
+  StringVar* string_var = StringVar::FromPPVar(key);
+  if (!string_var)
+    return PP_MakeUndefined();
+
+  KeyValueMap::const_iterator iter = key_value_map_.find(string_var->value());
+  if (iter != key_value_map_.end()) {
+    if (PpapiGlobals::Get()->GetVarTracker()->AddRefVar(iter->second.get()))
+      return iter->second.get();
+    else
+      return PP_MakeUndefined();
+  } else {
+    return PP_MakeUndefined();
+  }
+}
+
+PP_Bool DictionaryVar::Set(const PP_Var& key, const PP_Var& value) {
+  StringVar* string_var = StringVar::FromPPVar(key);
+  if (!string_var)
+    return PP_FALSE;
+
+  key_value_map_[string_var->value()] = value;
+  return PP_TRUE;
+}
+
+void DictionaryVar::Delete(const PP_Var& key) {
+  StringVar* string_var = StringVar::FromPPVar(key);
+  if (!string_var)
+    return;
+
+  key_value_map_.erase(string_var->value());
+}
+
+PP_Bool DictionaryVar::HasKey(const PP_Var& key) const {
+  StringVar* string_var = StringVar::FromPPVar(key);
+  if (!string_var)
+    return PP_FALSE;
+
+  bool result =
+      key_value_map_.find(string_var->value()) != key_value_map_.end();
+  return PP_FromBool(result);
+}
+
+PP_Var DictionaryVar::GetKeys() const {
+  // TODO(yzshen): Implement once array PP_Var is supported.
+  return PP_MakeNull();
+}
+
+bool DictionaryVar::SetWithStringKey(const std::string& utf8_key,
+                                     const PP_Var& value) {
+  if (!IsStringUTF8(utf8_key))
+    return false;
+
+  key_value_map_[utf8_key] = value;
+  return true;
+}
+
+void DictionaryVar::DeleteWithStringKey(const std::string& utf8_key) {
+  key_value_map_.erase(utf8_key);
+}
+
+}  // namespace ppapi