Enables the user to select multiple languages for spellchecking (UI)

chrome/browser/renderer_context_menu/spellchecker_submenu_observer_hunspell.cc

 // Copyright 2014 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/renderer_context_menu/spellchecker_submenu_observer.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/prefs/pref_member.h"
 #include "base/prefs/pref_service.h"
+#include "base/strings/string_split.h"
+#include "base/strings/string_util.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/renderer_context_menu/render_view_context_menu.h"
 #include "chrome/browser/spellchecker/spellcheck_service.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/spellcheck_messages.h"
 #include "chrome/grit/generated_resources.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "extensions/browser/view_type_utils.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/models/simple_menu_model.h"
 
 using content::BrowserThread;
 
 SpellCheckerSubMenuObserver::SpellCheckerSubMenuObserver(
     RenderViewContextMenuProxy* proxy,
     ui::SimpleMenuModel::Delegate* delegate,
     int group)
-    : proxy_(proxy),
-      submenu_model_(delegate),
-      language_group_(group),
-      language_selected_(0) {
+    : proxy_(proxy), submenu_model_(delegate), language_group_(group) {
   DCHECK(proxy_);
 }
 
 SpellCheckerSubMenuObserver::~SpellCheckerSubMenuObserver() {
 }
 
 void SpellCheckerSubMenuObserver::InitMenu(
     const content::ContextMenuParams& params) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   // Add available spell-checker languages to the sub menu.
   content::BrowserContext* browser_context = proxy_->GetBrowserContext();
   DCHECK(browser_context);
-  language_selected_ =
+  languages_selected_ =
       SpellcheckService::GetSpellCheckLanguages(browser_context, &languages_);
   DCHECK(languages_.size() <
          IDC_SPELLCHECK_LANGUAGES_LAST - IDC_SPELLCHECK_LANGUAGES_FIRST);
+
   const std::string app_locale = g_browser_process->GetApplicationLocale();
-  for (size_t i = 0; i < languages_.size(); ++i) {
-    base::string16 display_name(
-        l10n_util::GetDisplayNameForLocale(languages_[i], app_locale, true));
-    submenu_model_.AddRadioItem(IDC_SPELLCHECK_LANGUAGES_FIRST + i,
-                                display_name,
-                                language_group_);
+
+  const CommandLine* command_line = CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kEnableMultilingualSpellChecker)) {

[please use gerrit instead, 2014/11/07 16:20:08]

It's best to put this line into a separate function that you call here and
below. When we will move from a command-line argument to an experiment (enabled
by default for 10% of users), it will be easier to make the change inside of
this single function instead of multiple places in code.

bool isMultilingualSpellcheckerEnabled() {
  return command_line->HasSwitch(switches::kEnableMultilingualSpellChecker);
}

[Klemen Forstnerič, 2014/11/11 21:52:01]

Good idea, I'll do it this way.

+    for (size_t i = 0; i < languages_.size(); ++i) {
+      base::string16 display_name(
+          l10n_util::GetDisplayNameForLocale(languages_[i], app_locale, true));
+      submenu_model_.AddCheckItem(IDC_SPELLCHECK_LANGUAGES_FIRST + i,
+                                  display_name);
+    }
+  } else {
+    for (size_t i = 0; i < languages_.size(); ++i) {
+      base::string16 display_name(
+          l10n_util::GetDisplayNameForLocale(languages_[i], app_locale, true));
+      submenu_model_.AddRadioItem(
+          IDC_SPELLCHECK_LANGUAGES_FIRST + i, display_name, language_group_);
+    }
   }
 
   // Add an item that opens the 'fonts and languages options' page.
   submenu_model_.AddSeparator(ui::NORMAL_SEPARATOR);
-  submenu_model_.AddItemWithStringId(
-      IDC_CONTENT_CONTEXT_LANGUAGE_SETTINGS,
-      IDS_CONTENT_CONTEXT_LANGUAGE_SETTINGS);
+  submenu_model_.AddItemWithStringId(IDC_CONTENT_CONTEXT_LANGUAGE_SETTINGS,
+                                     IDS_CONTENT_CONTEXT_LANGUAGE_SETTINGS);
 
   // Add a 'Check spelling while typing' item in the sub menu.
   submenu_model_.AddCheckItem(
       IDC_CHECK_SPELLING_WHILE_TYPING,
       l10n_util::GetStringUTF16(
           IDS_CONTENT_CONTEXT_CHECK_SPELLING_WHILE_TYPING));
 
   // Add a check item "Ask Google for spelling suggestions" item. (This class
   // does not handle this item because the SpellingMenuObserver class handles it
   // on behalf of this class.)
-  submenu_model_.AddCheckItem(IDC_CONTENT_CONTEXT_SPELLING_TOGGLE,
+  submenu_model_.AddCheckItem(
+      IDC_CONTENT_CONTEXT_SPELLING_TOGGLE,
       l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_SPELLING_ASK_GOOGLE));
 
   // Add a check item "Automatically correct spelling".
-  const CommandLine* command_line = CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switches::kEnableSpellingAutoCorrect)) {
-    submenu_model_.AddCheckItem(IDC_CONTENT_CONTEXT_AUTOCORRECT_SPELLING_TOGGLE,
+    submenu_model_.AddCheckItem(
+        IDC_CONTENT_CONTEXT_AUTOCORRECT_SPELLING_TOGGLE,
         l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_SPELLING_AUTOCORRECT));
   }
 
   proxy_->AddSubMenu(
       IDC_SPELLCHECK_MENU,
       l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_SPELLCHECK_MENU),
       &submenu_model_);
 }
 
 bool SpellCheckerSubMenuObserver::IsCommandIdSupported(int command_id) {
@@ skipping 16 matching lines @@
   }
 
   return false;
 }
 
 bool SpellCheckerSubMenuObserver::IsCommandIdChecked(int command_id) {
   DCHECK(IsCommandIdSupported(command_id));
 
   if (command_id >= IDC_SPELLCHECK_LANGUAGES_FIRST &&
       command_id < IDC_SPELLCHECK_LANGUAGES_LAST) {
-    return language_selected_ == command_id - IDC_SPELLCHECK_LANGUAGES_FIRST;
+    return languages_selected_.count(command_id -
+                                     IDC_SPELLCHECK_LANGUAGES_FIRST) == 1;
   }
 
   // Check box for 'Check Spelling while typing'.
   if (command_id == IDC_CHECK_SPELLING_WHILE_TYPING) {
     Profile* profile = Profile::FromBrowserContext(proxy_->GetBrowserContext());
     DCHECK(profile);
     return profile->GetPrefs()->GetBoolean(prefs::kEnableContinuousSpellcheck);
   }
 
   return false;
@@ skipping 19 matching lines @@
 
   return false;
 }
 
 void SpellCheckerSubMenuObserver::ExecuteCommand(int command_id) {
   DCHECK(IsCommandIdSupported(command_id));
 
   // Check to see if one of the spell check language ids have been clicked.
   Profile* profile = Profile::FromBrowserContext(proxy_->GetBrowserContext());
   DCHECK(profile);
-  if (command_id >= IDC_SPELLCHECK_LANGUAGES_FIRST &&
-      command_id < IDC_SPELLCHECK_LANGUAGES_LAST) {
+
+  PrefService* prefs = profile->GetPrefs();
+
+  if (command_id == IDC_CHECK_SPELLING_WHILE_TYPING) {
+    prefs->SetBoolean(prefs::kEnableContinuousSpellcheck,
+                      !prefs->GetBoolean(prefs::kEnableContinuousSpellcheck));
+  } else if (command_id >= IDC_SPELLCHECK_LANGUAGES_FIRST &&
+             command_id < IDC_SPELLCHECK_LANGUAGES_LAST) {
     const size_t language = command_id - IDC_SPELLCHECK_LANGUAGES_FIRST;
-    if (profile && language < languages_.size()) {
-      StringPrefMember dictionary_language;
-      dictionary_language.Init(prefs::kSpellCheckDictionary,
-                               profile->GetPrefs());
-      dictionary_language.SetValue(languages_[language]);
+    if (!profile || language >= languages_.size())
+      return;
+
+    const CommandLine* command_line = CommandLine::ForCurrentProcess();
+    if (command_line->HasSwitch(switches::kEnableMultilingualSpellChecker)) {
+      std::vector<std::string> languages_separated;
+      base::SplitString(prefs->GetString(prefs::kSpellCheckDictionaries),
+                        ',',
+                        &languages_separated);
+
+      std::vector<std::string>::iterator language_iter =
+          std::find(languages_separated.begin(),
+                    languages_separated.end(),
+                    languages_[language]);
+
+      if (language_iter != languages_separated.end())
+        languages_separated.erase(language_iter);
+      else
+        languages_separated.push_back(languages_[language]);
+
+      prefs->SetString(prefs::kSpellCheckDictionaries,
+                       JoinString(languages_separated, ','));
+    } else {
+      prefs->SetString(prefs::kSpellCheckDictionary, languages_[language]);
     }
-    return;
-  }
-
-  switch (command_id) {
-    case IDC_CHECK_SPELLING_WHILE_TYPING:
-      profile->GetPrefs()->SetBoolean(
-          prefs::kEnableContinuousSpellcheck,
-          !profile->GetPrefs()->GetBoolean(prefs::kEnableContinuousSpellcheck));
-    break;
   }
 }