Introduce incognito preference settings.

chrome/browser/extensions/extension_pref_value_map.cc

Index: chrome/browser/extensions/extension_pref_value_map.cc
diff --git a/chrome/browser/extensions/extension_pref_value_map.cc b/chrome/browser/extensions/extension_pref_value_map.cc
new file mode 100644
index 0000000000000000000000000000000000000000..3ae4ca95cc4ca8126796965a47e4dfd9794d06c7
--- /dev/null
+++ b/chrome/browser/extensions/extension_pref_value_map.cc
@@ -0,0 +1,181 @@
+// Copyright (c) 2011 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/extensions/extension_pref_value_map.h"
+
+#include "base/stl_util-inl.h"
+#include "base/values.h"
+#include "chrome/browser/prefs/pref_value_map.h"
+
+ExtensionPrefValueMap::ExtensionPrefValueMap() {
+}
+
+ExtensionPrefValueMap::~ExtensionPrefValueMap() {
+  NotifyOfDestruction();
+  STLDeleteValues(&entries_);
+  entries_.clear();
+}
+
+void ExtensionPrefValueMap::SetExtensionPref(const std::string& ext_id,
+                                             const std::string& key,
+                                             bool incognito,
+                                             Value* value) {
+  PrefValueMap* prefs = GetExtensionPrefValueMap(ext_id, incognito);
+
+  if (prefs->SetValue(key, value))
+    NotifyPrefValueChanged(key);
+}
+
+void ExtensionPrefValueMap::RemoveExtensionPref(const std::string& ext_id,
+                                                const std::string& key,
+                                                bool incognito) {
+  PrefValueMap* prefs = GetExtensionPrefValueMap(ext_id, incognito);
+  if (prefs->RemoveValue(key))
+    NotifyPrefValueChanged(key);
+}
+
+void ExtensionPrefValueMap::RegisterExtension(const std::string& ext_id,
+                                              const base::Time& install_time,
+                                              bool is_enabled) {
+  if (entries_.find(ext_id) != entries_.end())
+    UnregisterExtension(ext_id);
+  entries_[ext_id] = new ExtensionEntry;
+  entries_[ext_id]->install_time = install_time;
+  entries_[ext_id]->enabled = is_enabled;
+}
+
+void ExtensionPrefValueMap::UnregisterExtension(const std::string& ext_id) {
+  ExtensionEntryMap::iterator i = entries_.find(ext_id);
+  if (i == entries_.end())
+    return;
+  std::set<std::string> keys;  // keys set by this extension
+  GetExtensionControlledKeys(*(i->second), &keys);
+
+  delete i->second;
+  entries_.erase(i);
+
+  NotifyPrefValueChanged(keys);
+}
+
+void ExtensionPrefValueMap::SetExtensionState(const std::string& ext_id,
+                                              bool is_enabled) {
+  ExtensionEntryMap::const_iterator i = entries_.find(ext_id);
+  CHECK(i != entries_.end());
+  if (i->second->enabled == is_enabled)
+    return;
+  std::set<std::string> keys;  // keys set by this extension
+  GetExtensionControlledKeys(*(i->second), &keys);
+  i->second->enabled = is_enabled;
+  NotifyPrefValueChanged(keys);
+}
+
+PrefValueMap* ExtensionPrefValueMap::GetExtensionPrefValueMap(
+    const std::string& ext_id,
+    bool incognito) {
+  ExtensionEntryMap::const_iterator i = entries_.find(ext_id);
+  CHECK(i != entries_.end());
+  return incognito ? &(i->second->inc_preferences)
+                   : &(i->second->reg_preferences);
+}
+
+const PrefValueMap* ExtensionPrefValueMap::GetExtensionPrefValueMap(
+    const std::string& ext_id,
+    bool incognito) const {
+  ExtensionEntryMap::const_iterator i = entries_.find(ext_id);
+  CHECK(i != entries_.end());
+  return incognito ? &(i->second->inc_preferences)
+                   : &(i->second->reg_preferences);
+}
+
+void ExtensionPrefValueMap::GetExtensionControlledKeys(
+    const ExtensionEntry& entry,
+    std::set<std::string>* out) const {
+  PrefValueMap::const_iterator i;
+
+  const PrefValueMap& reg_prefs = entry.reg_preferences;
+  for (i = reg_prefs.begin(); i != reg_prefs.end(); ++i)
+    out->insert(i->first);
+
+  const PrefValueMap& inc_prefs = entry.inc_preferences;
+  for (i = inc_prefs.begin(); i != inc_prefs.end(); ++i)
+    out->insert(i->first);
+}
+
+const Value* ExtensionPrefValueMap::GetEffectivePrefValue(
+    const std::string& key,
+    bool incognito) const {
+  Value *winner = NULL;
+  base::Time winners_install_time;
+
+  ExtensionEntryMap::const_iterator i;
+  for (i = entries_.begin(); i != entries_.end(); ++i) {
+    const std::string& ext_id = i->first;
+    const base::Time& install_time = i->second->install_time;
+    const bool enabled = i->second->enabled;
+
+    if (!enabled)
+      continue;
+    if (install_time < winners_install_time)
+      continue;
+
+    Value* value = NULL;
+    const PrefValueMap* prefs = GetExtensionPrefValueMap(ext_id, false);
+    if (prefs->GetValue(key, &value)) {
+      winner = value;
+      winners_install_time = install_time;
+    }
+
+    if (!incognito)
+      continue;
+
+    prefs = GetExtensionPrefValueMap(ext_id, true);
+    if (prefs->GetValue(key, &value)) {
+      winner = value;
+      winners_install_time = install_time;
+    }
+  }
+  return winner;
+}
+
+void ExtensionPrefValueMap::AddObserver(
+    ExtensionPrefValueMap::Observer* observer) {
+  observers_.AddObserver(observer);
+
+  // Collect all currently used keys and notify the new observer.
+  std::set<std::string> keys;
+  ExtensionEntryMap::const_iterator i;
+  for (i = entries_.begin(); i != entries_.end(); ++i)
+    GetExtensionControlledKeys(*(i->second), &keys);
+
+  std::set<std::string>::const_iterator j;
+  for (j = keys.begin(); j != keys.end(); ++j)
+    observer->OnPrefValueChanged(*j);
+}
+
+void ExtensionPrefValueMap::RemoveObserver(
+    ExtensionPrefValueMap::Observer* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+void ExtensionPrefValueMap::NotifyInitializationCompleted() {
+  FOR_EACH_OBSERVER(ExtensionPrefValueMap::Observer, observers_,
+                    OnInitializationCompleted());
+}
+
+void ExtensionPrefValueMap::NotifyPrefValueChanged(
+    const std::set<std::string>& keys) {
+  std::set<std::string>::const_iterator i;
+  for (i = keys.begin(); i != keys.end(); ++i)
+    NotifyPrefValueChanged(*i);
+}
+
+void ExtensionPrefValueMap::NotifyPrefValueChanged(const std::string& key) {
+  FOR_EACH_OBSERVER(ExtensionPrefValueMap::Observer, observers_,
+                    OnPrefValueChanged(key));
+}
+
+void ExtensionPrefValueMap::NotifyOfDestruction() {
+  FOR_EACH_OBSERVER(ExtensionPrefValueMap::Observer, observers_,
+                    OnExtensionPrefValueMapDestruction());
+}