chrome/renderer/spellchecker/custom_dictionary_engine.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/renderer/spellchecker/custom_dictionary_engine.h"
   6
   7 #include "base/strings/utf_string_conversions.h"
   8
   9 CustomDictionaryEngine::CustomDictionaryEngine() {
  10 }
  11
  12 CustomDictionaryEngine::~CustomDictionaryEngine() {
  13 }
  14
  15 void CustomDictionaryEngine::Init(const std::set<std::string>& custom_words) {
  16   // SpellingMenuOberver calls UTF16ToUTF8(word) to convert words for storage,
  17   // synchronization, and use in the custom dictionary engine. Since
  18   // (UTF8ToUTF16(UTF16ToUTF8(word)) == word) holds, the engine does not need to
  19   // normalize the strings.
  20   for (const std::string& word : custom_words)
  21     dictionary_.insert(base::UTF8ToUTF16(word));
  22 }
  23
  24 void CustomDictionaryEngine::OnCustomDictionaryChanged(
  25     const std::set<std::string>& words_added,
  26     const std::set<std::string>& words_removed) {
  27   for (const std::string& word : words_added)
  28     dictionary_.insert(base::UTF8ToUTF16(word));
  29
  30   for (const std::string& word : words_removed)
  31     dictionary_.erase(base::UTF8ToUTF16(word));
  32 }
  33
  34 bool CustomDictionaryEngine::SpellCheckWord(
  35     const base::string16& text,
  36     int misspelling_start,
  37     int misspelling_len) {
  38   // The text to be checked is empty on OSX(async) right now.
  39   // TODO(groby): Fix as part of async hook-up. (http://crbug.com/178241)
  40   return
  41       misspelling_start >= 0 &&
  42       misspelling_len > 0 &&
  43       size_t(misspelling_start + misspelling_len) <= text.length() &&
  44       dictionary_.count(text.substr(misspelling_start, misspelling_len)) > 0;
  45 }