chrome/common/extensions/api/speech/tts_engine_manifest_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/common/extensions/api/speech/tts_engine_manifest_handler.h"

#include "base/memory/scoped_ptr.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.h"
#include "extensions/common/manifest_constants.h"
#include "ui/base/l10n/l10n_util.h"

namespace extensions {

namespace keys = manifest_keys;
namespace errors = manifest_errors;

namespace {

struct TtsVoices : public Extension::ManifestData {
  TtsVoices() {}
  virtual ~TtsVoices() {}

  std::vector<extensions::TtsVoice> voices;
};

}  // namespace

TtsVoice::TtsVoice() : remote(false) {}

TtsVoice::~TtsVoice() {}

// static
const std::vector<TtsVoice>* TtsVoice::GetTtsVoices(
    const Extension* extension) {
  TtsVoices* info = static_cast<TtsVoices*>(
      extension->GetManifestData(keys::kTtsVoices));
  return info ? &info->voices : NULL;
}

TtsEngineManifestHandler::TtsEngineManifestHandler() {
}

TtsEngineManifestHandler::~TtsEngineManifestHandler() {
}

bool TtsEngineManifestHandler::Parse(Extension* extension,
                                     base::string16* error) {
  scoped_ptr<TtsVoices> info(new TtsVoices);
  const base::DictionaryValue* tts_dict = NULL;
  if (!extension->manifest()->GetDictionary(keys::kTtsEngine, &tts_dict)) {
    *error = ASCIIToUTF16(errors::kInvalidTts);
    return false;
  }

  if (!tts_dict->HasKey(keys::kTtsVoices))
    return true;

  const base::ListValue* tts_voices = NULL;
  if (!tts_dict->GetList(keys::kTtsVoices, &tts_voices)) {
    *error = ASCIIToUTF16(errors::kInvalidTtsVoices);
    return false;
  }

  for (size_t i = 0; i < tts_voices->GetSize(); i++) {
    const base::DictionaryValue* one_tts_voice = NULL;
    if (!tts_voices->GetDictionary(i, &one_tts_voice)) {
      *error = ASCIIToUTF16(errors::kInvalidTtsVoices);
      return false;
    }

    TtsVoice voice_data;
    if (one_tts_voice->HasKey(keys::kTtsVoicesVoiceName)) {
      if (!one_tts_voice->GetString(
              keys::kTtsVoicesVoiceName, &voice_data.voice_name)) {
        *error = ASCIIToUTF16(errors::kInvalidTtsVoicesVoiceName);
        return false;
      }
    }
    if (one_tts_voice->HasKey(keys::kTtsVoicesLang)) {
      if (!one_tts_voice->GetString(
              keys::kTtsVoicesLang, &voice_data.lang) ||
          !l10n_util::IsValidLocaleSyntax(voice_data.lang)) {
        *error = ASCIIToUTF16(errors::kInvalidTtsVoicesLang);
        return false;
      }
    }
    if (one_tts_voice->HasKey(keys::kTtsVoicesGender)) {
      if (!one_tts_voice->GetString(
              keys::kTtsVoicesGender, &voice_data.gender) ||
          (voice_data.gender != keys::kTtsGenderMale &&
           voice_data.gender != keys::kTtsGenderFemale)) {
        *error = ASCIIToUTF16(errors::kInvalidTtsVoicesGender);
        return false;
      }
    }
    if (one_tts_voice->HasKey(keys::kTtsVoicesRemote)) {
      if (!one_tts_voice->GetBoolean(
              keys::kTtsVoicesRemote, &voice_data.remote)) {
        *error = ASCIIToUTF16(errors::kInvalidTtsVoicesRemote);
        return false;
      }
    }
    if (one_tts_voice->HasKey(keys::kTtsVoicesEventTypes)) {
      const base::ListValue* event_types_list;
      if (!one_tts_voice->GetList(
              keys::kTtsVoicesEventTypes,
              &event_types_list)) {
        *error = ASCIIToUTF16(
            errors::kInvalidTtsVoicesEventTypes);
        return false;
      }
      for (size_t i = 0; i < event_types_list->GetSize(); i++) {
        std::string event_type;
        if (!event_types_list->GetString(i, &event_type)) {
          *error = ASCIIToUTF16(errors::kInvalidTtsVoicesEventTypes);
          return false;
        }
        if (event_type != keys::kTtsVoicesEventTypeEnd &&
            event_type != keys::kTtsVoicesEventTypeError &&
            event_type != keys::kTtsVoicesEventTypeMarker &&
            event_type != keys::kTtsVoicesEventTypeSentence &&
            event_type != keys::kTtsVoicesEventTypeStart &&
            event_type != keys::kTtsVoicesEventTypeWord) {
          *error = ASCIIToUTF16(errors::kInvalidTtsVoicesEventTypes);
          return false;
        }
        if (voice_data.event_types.find(event_type) !=
            voice_data.event_types.end()) {
          *error = ASCIIToUTF16(errors::kInvalidTtsVoicesEventTypes);
          return false;
        }
        voice_data.event_types.insert(event_type);
      }
    }

    info->voices.push_back(voice_data);
  }

  extension->SetManifestData(keys::kTtsVoices, info.release());
  return true;
}

const std::vector<std::string> TtsEngineManifestHandler::Keys() const {
  return SingleKey(keys::kTtsEngine);
}

}  // namespace extensions