SpellCheck refactoring: Moved user custom dictionary for spell check to SpellCheckProfile.

chrome/browser/spellchecker/spellcheck_profile.cc

Index: chrome/browser/spellchecker/spellcheck_profile.cc
diff --git a/chrome/browser/spellchecker/spellcheck_profile.cc b/chrome/browser/spellchecker/spellcheck_profile.cc
index dd79b96df26c7b3bc7693640c05221f625564f34..509b3cba1eac1c4c5dbb705400233a4ef6000db7 100644
--- a/chrome/browser/spellchecker/spellcheck_profile.cc
+++ b/chrome/browser/spellchecker/spellcheck_profile.cc
@@ -4,12 +4,16 @@
 
 #include "chrome/browser/spellchecker/spellcheck_profile.h"
 
+#include "base/file_util.h"
 #include "base/lazy_instance.h"
+#include "base/path_service.h"
+#include "base/string_split.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/spellchecker/spellcheck_host.h"
 #include "chrome/browser/spellchecker/spellcheck_host_metrics.h"
 #include "chrome/common/pref_names.h"
+#include "content/browser/browser_thread.h"
 
 namespace {
 base::LazyInstance<SpellCheckProfile::CustomWordList> g_empty_list(
@@ -76,25 +80,103 @@ void SpellCheckProfile::StartRecordingMetrics(bool spellcheck_enabled) {
   metrics_->RecordEnabledStats(spellcheck_enabled);
 }
 
-void SpellCheckProfile::SpellCheckHostInitialized(
-    SpellCheckProfile::CustomWordList* custom_words) {
-  host_ready_ = !!host_.get() && host_->IsReady();
-  custom_words_.reset(custom_words);
+void SpellCheckProfile::ClearCustomWords() {
+  custom_words_->clear();
+}
+
+FilePath SpellCheckProfile::GetCustomDictionaryDir() {
+  DCHECK(!IsTesting());
+
+  FilePath personal_file_directory;
+  PathService::Get(chrome::DIR_USER_DATA, &personal_file_directory);
+  return personal_file_directory;
+}
+
+void SpellCheckProfile::WriteWordToCustomDictionary(const std::string& word) {
+  BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
+      NewRunnableMethod(this,
+          &SpellCheckProfile::WriteWordToCustomDictionaryOnFileThread, word));
+}
+
+void SpellCheckProfile::WriteWordToCustomDictionaryOnFileThread(
+    const std::string& word) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
+
+  // Stored in UTF-8.
+  std::string word_to_add(word + "\n");
+  FILE* f = file_util::OpenFile(GetCustomDictionaryFile(), "a+");
+  if (f)
+    fputs(word_to_add.c_str(), f);
+  file_util::CloseFile(f);
+}
+
+void SpellCheckProfile::LoadCustomDictionary() {
+  BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
+      NewRunnableMethod(
+          this,
+          &SpellCheckProfile::LoadCustomDictionaryOnFileThread));
+}
+
+void SpellCheckProfile::LoadCustomDictionaryOnFileThread() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
+
+  scoped_ptr<CustomWordList> custom_words(new CustomWordList);
+
+  std::string contents;
+  file_util::ReadFileToString(GetCustomDictionaryFile(), &contents);
+  CustomWordList list_of_words;
+  base::SplitString(contents, '\n', &list_of_words);
+  for (size_t i = 0; i < list_of_words.size(); ++i) {
+    if (!list_of_words[i].empty())
+      custom_words->push_back(list_of_words[i]);
+  }
+
+  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
+                          NewRunnableMethod(
+                              this,
+                              &SpellCheckProfile::CustomDictionaryLoaded,
+                              custom_words.release()));
+}
+
+void SpellCheckProfile::CustomDictionaryLoaded(CustomWordList* word_list) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) || IsTesting());
+
+  custom_words_.reset(word_list);
   if (metrics_.get()) {
     int count = custom_words_.get() ? custom_words_->size() : 0;
     metrics_->RecordCustomWordCountStats(count);
   }
 }
 
+void SpellCheckProfile::SpellCheckHostInitialized() {
+  host_ready_ = !!host_.get() && host_->IsReady();
+}
+
 const SpellCheckProfile::CustomWordList&
 SpellCheckProfile::GetCustomWords() const {
   return custom_words_.get() ? *custom_words_ : g_empty_list.Get();
 }
 
 void SpellCheckProfile::CustomWordAddedLocally(const std::string& word) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) || IsTesting());
+
   if (!custom_words_.get())
     custom_words_.reset(new CustomWordList());
   custom_words_->push_back(word);
   if (metrics_.get())
     metrics_->RecordCustomWordCountStats(custom_words_->size());
+
+  WriteWordToCustomDictionary(word);
+}
+
+const FilePath& SpellCheckProfile::GetCustomDictionaryFile() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE) || IsTesting());
+
+  if (custom_dictionary_file_.empty()) {
+    FilePath personal_file_directory = GetCustomDictionaryDir();
+    custom_dictionary_file_ =
+        personal_file_directory.Append(chrome::kCustomDictionaryFileName);
+  }
+
+  return custom_dictionary_file_;
 }