Add policies to control Chrome OS power management

chrome/browser/policy/configuration_policy_handler.cc

 // Copyright (c) 2012 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 "chrome/browser/policy/configuration_policy_handler.h"
 
+#include <algorithm>
 #include <string>
 
 #include "base/file_path.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
 #include "base/prefs/pref_value_map.h"
 #include "base/stl_util.h"
 #include "base/string16.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
@@ skipping 188 matching lines @@
   *value = policies.GetValue(policy_name_);
   if (*value && !(*value)->IsType(value_type_)) {
     errors->AddError(policy_name_,
                      IDS_POLICY_TYPE_ERROR,
                      ValueTypeToString(value_type_));
     return false;
   }
   return true;
 }
 
+// IntRangePolicyHandlerBase implementation ------------------------------------
+
+IntRangePolicyHandlerBase::IntRangePolicyHandlerBase(
+    const char* policy_name,
+    int min,
+    int max,
+    bool clamp)
+    : TypeCheckingPolicyHandler(policy_name, base::Value::TYPE_INTEGER),
+      min_(min),
+      max_(max),
+      clamp_(clamp) {
+}
+
+bool IntRangePolicyHandlerBase::CheckPolicySettings(const PolicyMap& policies,
+                                                    PolicyErrorMap* errors) {
+  const base::Value* value;
+  return CheckAndGetValue(policies, errors, &value) &&
+      EnsureInRange(value, NULL, errors);
+}
+
+IntRangePolicyHandlerBase::~IntRangePolicyHandlerBase() {
+}
+
+bool IntRangePolicyHandlerBase::EnsureInRange(const base::Value* input,
+                                              int* output,
+                                              PolicyErrorMap* errors) {
+  if (!input)
+    return true;
+
+  int value;
+  if (!input->GetAsInteger(&value)) {
+    NOTREACHED();
+    return false;
+  }
+
+  if (value < min_ || value > max_) {
+    if (errors) {
+      errors->AddError(policy_name(),
+                       IDS_POLICY_OUT_OF_RANGE_ERROR,
+                       base::IntToString(value));
+    }
+
+    if (!clamp_)
+      return false;
+
+    value = std::min(std::max(value, min_), max_);
+  }
+
+  if (output)
+    *output = value;
+  return true;
+}
+
 // StringToIntEnumListPolicyHandler implementation -----------------------------
 
 StringToIntEnumListPolicyHandler::StringToIntEnumListPolicyHandler(
     const char* policy_name,
     const char* pref_path,
     const MappingEntry* mapping_begin,
     const MappingEntry* mapping_end)
     : TypeCheckingPolicyHandler(policy_name, base::Value::TYPE_LIST),
       pref_path_(pref_path),
       mapping_begin_(mapping_begin),
@@ skipping 55 matching lines @@
         errors->AddError(policy_name(),
                          entry - list_value->begin(),
                          IDS_POLICY_OUT_OF_RANGE_ERROR);
       }
     }
   }
 
   return true;
 }
 
+// IntRangePolicyHandler implementation ----------------------------------------
+
+IntRangePolicyHandler::IntRangePolicyHandler(const char* policy_name,
+                                             const char* pref_path,
+                                             int min,
+                                             int max,
+                                             bool clamp)
+    : IntRangePolicyHandlerBase(policy_name, min, max, clamp),
+      pref_path_(pref_path) {
+}
+
+IntRangePolicyHandler::~IntRangePolicyHandler() {
+}
+
+void IntRangePolicyHandler::ApplyPolicySettings(const PolicyMap& policies,
+                                                PrefValueMap* prefs) {
+  const base::Value* value = policies.GetValue(policy_name());
+  int value_in_range;
+  if (value && EnsureInRange(value, &value_in_range, NULL)) {
+    prefs->SetValue(pref_path_,
+                    base::Value::CreateIntegerValue(value_in_range));
+  }
+}
+
+// IntPercentageToDoublePolicyHandler implementation ---------------------------
+
+IntPercentageToDoublePolicyHandler::IntPercentageToDoublePolicyHandler(
+    const char* policy_name,
+    const char* pref_path,
+    int min,
+    int max,
+    bool clamp)
+    : IntRangePolicyHandlerBase(policy_name, min, max, clamp),
+      pref_path_(pref_path) {
+}
+
+IntPercentageToDoublePolicyHandler::~IntPercentageToDoublePolicyHandler() {
+}
+
+void IntPercentageToDoublePolicyHandler::ApplyPolicySettings(
+    const PolicyMap& policies,
+    PrefValueMap* prefs) {
+  const base::Value* value = policies.GetValue(policy_name());
+  int percentage;
+  if (value && EnsureInRange(value, &percentage, NULL)) {
+    prefs->SetValue(pref_path_, base::Value::CreateDoubleValue(
+        static_cast<double>(percentage) / 100.));
+  }
+}
+
 // ExtensionListPolicyHandler implementation -----------------------------------
 
 ExtensionListPolicyHandler::ExtensionListPolicyHandler(const char* policy_name,
                                                        const char* pref_path,
                                                        bool allow_wildcards)
     : TypeCheckingPolicyHandler(policy_name, base::Value::TYPE_LIST),
       pref_path_(pref_path),
       allow_wildcards_(allow_wildcards) {}
 
 ExtensionListPolicyHandler::~ExtensionListPolicyHandler() {}
@@ skipping 1161 matching lines @@
           errors->AddError(policy_name(),
                            IDS_POLICY_OUT_OF_RANGE_ERROR,
                            base::IntToString(restore_value));
       }
     }
   }
   return true;
 }
 
 }  // namespace policy