text: // 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 "chrome/common/extensions/api/commands/commands_handler.h"
  
  #include "base/strings/string_number_conversions.h"
  #include "base/strings/utf_string_conversions.h"
  #include "base/values.h"
  #include "extensions/common/error_utils.h"
  #include "extensions/common/manifest_constants.h"
  
  namespace extensions {
  
  namespace keys = manifest_keys;
  
  namespace {
  // The maximum number of commands (including page action/browser actions) with a
  // keybinding an extension can have.
  const int kMaxCommandsWithKeybindingPerExtension = 4;
  }  // namespace
  
  CommandsInfo::CommandsInfo() {
  }
  
  CommandsInfo::~CommandsInfo() {
  }
  
  // static
  const Command* CommandsInfo::GetBrowserActionCommand(
     const Extension* extension) {
    CommandsInfo* info = static_cast<CommandsInfo*>(
        extension->GetManifestData(keys::kCommands));
    return info ? info->browser_action_command.get() : NULL;
  }
  
  // static
  const Command* CommandsInfo::GetPageActionCommand(const Extension* extension) {
    CommandsInfo* info = static_cast<CommandsInfo*>(
        extension->GetManifestData(keys::kCommands));
    return info ? info->page_action_command.get() : NULL;
  }
  
  // static
  const CommandMap* CommandsInfo::GetNamedCommands(const Extension* extension) {
    CommandsInfo* info = static_cast<CommandsInfo*>(
        extension->GetManifestData(keys::kCommands));
    return info ? &info->named_commands : NULL;
  }
  
  CommandsHandler::CommandsHandler() {
  }
  
  CommandsHandler::~CommandsHandler() {
  }
  
  bool CommandsHandler::Parse(Extension* extension, base::string16* error) {
    if (!extension->manifest()->HasKey(keys::kCommands)) {
      scoped_ptr<CommandsInfo> commands_info(new CommandsInfo);
      MaybeSetBrowserActionDefault(extension, commands_info.get());
      extension->SetManifestData(keys::kCommands,
                                 commands_info.release());
      return true;
    }
  
    const base::DictionaryValue* dict = NULL;
    if (!extension->manifest()->GetDictionary(keys::kCommands, &dict)) {
      *error = base::ASCIIToUTF16(manifest_errors::kInvalidCommandsKey);
      return false;
    }
  
    scoped_ptr<CommandsInfo> commands_info(new CommandsInfo);
  
    int command_index = 0;
    int keybindings_found = 0;
    for (base::DictionaryValue::Iterator iter(*dict); !iter.IsAtEnd();
         iter.Advance()) {
      ++command_index;
  
      const base::DictionaryValue* command = NULL;
      if (!iter.value().GetAsDictionary(&command)) {
        *error = ErrorUtils::FormatErrorMessageUTF16(
            manifest_errors::kInvalidKeyBindingDictionary,
            base::IntToString(command_index));
        return false;
      }
  
      scoped_ptr<extensions::Command> binding(new Command());
      if (!binding->Parse(command, iter.key(), command_index, error))
        return false;  // |error| already set.
  
      if (binding->accelerator().key_code() != ui::VKEY_UNKNOWN) {
        if (++keybindings_found > kMaxCommandsWithKeybindingPerExtension) {
          *error = ErrorUtils::FormatErrorMessageUTF16(
              manifest_errors::kInvalidKeyBindingTooMany,
              base::IntToString(kMaxCommandsWithKeybindingPerExtension));
          return false;
        }
      }
  
      std::string command_name = binding->command_name();
      if (command_name == manifest_values::kBrowserActionCommandEvent) {
        commands_info->browser_action_command.reset(binding.release());
      } else if (command_name ==
                     manifest_values::kPageActionCommandEvent) {
        commands_info->page_action_command.reset(binding.release());
      } else {
        if (command_name[0] != '_')  // All commands w/underscore are reserved.
          commands_info->named_commands[command_name] = *binding.get();
      }
    }
  
    MaybeSetBrowserActionDefault(extension, commands_info.get());
  
    extension->SetManifestData(keys::kCommands,
                               commands_info.release());
    return true;
  }
  
  bool CommandsHandler::AlwaysParseForType(Manifest::Type type) const {
    return type == Manifest::TYPE_EXTENSION ||
        type == Manifest::TYPE_LEGACY_PACKAGED_APP ||
        type == Manifest::TYPE_PLATFORM_APP;
  }
  
  void CommandsHandler::MaybeSetBrowserActionDefault(const Extension* extension,
                                                     CommandsInfo* info) {
    if (extension->manifest()->HasKey(keys::kBrowserAction) &&
        !info->browser_action_command.get()) {
      info->browser_action_command.reset(
          new Command(manifest_values::kBrowserActionCommandEvent,
                      base::string16(),
                      std::string(),
                      false));
    }
  }
  
  const std::vector<std::string> CommandsHandler::Keys() const {
    return SingleKey(keys::kCommands);
  }
  
  }  // namespace extensions
  