TODO

chrome/browser/extensions/extension_content_settings_store.cc

+// 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_content_settings_store.h"
+
+#include <set>
+
+#include "base/logging.h"
+
+struct ExtensionContentSettingsStore::ExtensionEntry {
+  // Installation time of the extension.
+  base::Time install_time;
+  // Whether extension is enabled in the profile.
+  bool enabled;
+  // Content settings.
+  ContentSettingSpecList settings;
+  // Incognito content settings
+  ContentSettingSpecList incognito_settings;
+};
+
+ExtensionContentSettingsStore::ExtensionContentSettingsStore() {
+}
+
+ExtensionContentSettingsStore::~ExtensionContentSettingsStore() {
+  NotifyOfDestruction();
+}
+
+void ExtensionContentSettingsStore::SetExtensionDefaultContentSetting(
+    ContentSettingsType content_type,
+    ContentSetting setting) {
+  // TODO(markusheintz): Implement.
+}
+
+ContentSetting
+    ExtensionContentSettingsStore::GetEffectiveDefaultContentSetting(
+        ContentSettingsType content_type) {
+  // TODO(markusheintz): Implement.
+  return CONTENT_SETTING_DEFAULT;
+}
+
+void ExtensionContentSettingsStore::SetExtensionContentSetting(
+    const std::string& ext_id,
+    const ContentSettingsPattern& pattern,
+    const ContentSettingsPattern& embedder_pattern,
+    const ContentSettingsType& type,
+    const content_settings::ResourceIdentifier& identifier,
+    ContentSetting setting,
+    bool incognito) {
+  ContentSettingSpecList* setting_spec_list =
+      GetContentSettingSpecList(ext_id, incognito);
+
+  // Find |ContentSettingSpec|
+  ContentSettingSpecList::iterator setting_spec = setting_spec_list->begin();
+  while (setting_spec != setting_spec_list->end()) {
+    if (setting_spec->a == pattern &&
+        setting_spec->b == embedder_pattern &&
+        setting_spec->c == type &&
+        setting_spec->d == identifier) {
+      break;
+    }
+    ++setting_spec;
+  }
+  if (setting_spec == setting_spec_list->end()) {
+    setting_spec = setting_spec_list->insert(
+        setting_spec_list->end(),
+        MakeTuple(pattern, embedder_pattern, type, identifier, setting));
+  }
+
+  // Update setting
+  if (setting != CONTENT_SETTING_DEFAULT) {
+    setting_spec->e = setting;
+  } else {
+    setting_spec_list->erase(setting_spec);
+  }
+
+  // Send notification that content settings changed
+  // TODO(markusheintz): Notifications should only be sent if the set content
+  // setting is effective and not hidden by an other setting of an other
+  // extensions installed more recently.
+  NotifyOfContentSettingChanged(
+    pattern,
+    embedder_pattern,
+    type,
+    identifier,
+    setting,
+    incognito);
+}
+
+void ExtensionContentSettingsStore::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 ExtensionContentSettingsStore::UnregisterExtension(
+    const std::string& ext_id) {
+  ExtensionEntryMap::iterator i = entries_.find(ext_id);
+  if (i == entries_.end())
+    return;
+
+  delete i->second;
+  entries_.erase(i);
+}
+
+void ExtensionContentSettingsStore::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;
+  i->second->enabled = is_enabled;
+}
+
+ExtensionContentSettingsStore::ContentSettingSpecList*
+    ExtensionContentSettingsStore::GetContentSettingSpecList(
+        const std::string& ext_id,
+        bool incognito) {
+  ExtensionEntryMap::const_iterator i = entries_.find(ext_id);
+  CHECK(i != entries_.end());
+  return incognito ? &(i->second->incognito_settings)
+                   : &(i->second->settings);
+}
+
+const ExtensionContentSettingsStore::ContentSettingSpecList*
+    ExtensionContentSettingsStore::GetContentSettingSpecList(
+        const std::string& ext_id,
+        bool incognito) const {
+  ExtensionEntryMap::const_iterator i = entries_.find(ext_id);
+  CHECK(i != entries_.end());
+  return incognito ? &(i->second->incognito_settings)
+                   : &(i->second->settings);
+}
+
+ContentSetting ExtensionContentSettingsStore::GetContentSettingFrom(
+      const GURL& url,
+      const GURL& embedder_url,
+      const ContentSettingsType& type,
+      const content_settings::ResourceIdentifier& identifier,
+      const ContentSettingSpecList* setting_spec_list) const {
+  ContentSettingSpecList::const_iterator winner_spec =
+      setting_spec_list->end();
+
+  for (ContentSettingSpecList::const_iterator spec =
+           setting_spec_list->begin();
+       spec!= setting_spec_list->end();
+       ++spec) {
+    if (!spec->a.Matches(url) ||
+        !spec->b.Matches(embedder_url) ||
+        spec->c != type ||
+        spec->d != identifier) {
+      continue;
+    }
+
+    if (winner_spec == setting_spec_list->end() ||
+        spec->a.Compare(winner_spec->a) == ContentSettingsPattern::SUCCESSOR) {
+      winner_spec = spec;
+    }
+  }
+
+  return (winner_spec != setting_spec_list->end()) ? winner_spec->e
+                                                   : CONTENT_SETTING_DEFAULT;
+}
+
+ContentSetting ExtensionContentSettingsStore::GetEffectiveContentSetting(
+        const GURL& url,
+        const GURL& embedder_url,
+        const ContentSettingsType& type,
+        const content_settings::ResourceIdentifier& identifier,
+        bool incognito) const {
+  ExtensionEntryMap::const_iterator winner = entries_.end();
+  base::Time winners_install_time;
+  ContentSetting winner_setting = CONTENT_SETTING_DEFAULT;
+
+  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;
+
+    const ContentSettingSpecList* setting_spec_list =
+        GetContentSettingSpecList(ext_id, false);
+    // Get non incognito setting
+    ContentSetting setting = GetContentSettingFrom(
+        url,
+        embedder_url,
+        type,
+        identifier,
+        setting_spec_list);
+
+    if (setting != CONTENT_SETTING_DEFAULT) {
+      winner = i;
+      winners_install_time = install_time;
+      winner_setting = setting;
+    }
+
+    if (!incognito)
+      continue;
+    // Get incognito setting
+    setting_spec_list =
+        GetContentSettingSpecList(ext_id, true);
+    setting = GetContentSettingFrom(
+        url,
+        embedder_url,
+        type,
+        identifier,
+        setting_spec_list);
+
+    if (setting != CONTENT_SETTING_DEFAULT) {
+      winner = i;
+      winners_install_time = install_time;
+      winner_setting = setting;
+    }
+  }
+
+  return winner_setting;
+}
+
+void ExtensionContentSettingsStore::AddObserver(Observer* observer) {
+  observers_.AddObserver(observer);
+}
+
+void ExtensionContentSettingsStore::RemoveObserver(Observer* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+void ExtensionContentSettingsStore::NotifyOfDestruction() {
+  FOR_EACH_OBSERVER(ExtensionContentSettingsStore::Observer,
+                    observers_,
+                    OnDestruction());
+}
+
+void ExtensionContentSettingsStore::NotifyOfContentSettingChanged(
+    const ContentSettingsPattern& pattern,
+    const ContentSettingsPattern& embedder_pattern,
+    const ContentSettingsType& type,
+    const content_settings::ResourceIdentifier& identifier,
+    ContentSetting setting,
+    bool incognito) {
+  FOR_EACH_OBSERVER(ExtensionContentSettingsStore::Observer,
+                    observers_,
+                    OnContentSettingChanged(
+                        pattern,
+                        embedder_pattern,
+                        type,
+                        identifier,
+                        setting,
+                        incognito));
+}