chrome/browser/renderer_context_menu/spelling_menu_observer.cc

   1 // Copyright 2014 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/browser/renderer_context_menu/spelling_menu_observer.h"
   6
   7 #include "base/bind.h"
   8 #include "base/command_line.h"
   9 #include "base/i18n/case_conversion.h"
  10 #include "base/prefs/pref_service.h"
  11 #include "base/strings/utf_string_conversions.h"
  12 #include "chrome/app/chrome_command_ids.h"
  13 #include "chrome/browser/profiles/profile.h"
  14 #include "chrome/browser/renderer_context_menu/render_view_context_menu.h"
  15 #include "chrome/browser/renderer_context_menu/spelling_bubble_model.h"
  16 #include "chrome/browser/spellchecker/feedback_sender.h"
  17 #include "chrome/browser/spellchecker/spellcheck_factory.h"
  18 #include "chrome/browser/spellchecker/spellcheck_host_metrics.h"
  19 #include "chrome/browser/spellchecker/spellcheck_platform.h"
  20 #include "chrome/browser/spellchecker/spellcheck_service.h"
  21 #include "chrome/browser/spellchecker/spelling_service_client.h"
  22 #include "chrome/browser/ui/confirm_bubble.h"
  23 #include "chrome/common/chrome_switches.h"
  24 #include "chrome/common/pref_names.h"
  25 #include "chrome/common/spellcheck_common.h"
  26 #include "chrome/common/spellcheck_result.h"
  27 #include "chrome/grit/generated_resources.h"
  28 #include "content/public/browser/render_view_host.h"
  29 #include "content/public/browser/render_widget_host_view.h"
  30 #include "content/public/browser/web_contents.h"
  31 #include "content/public/common/context_menu_params.h"
  32 #include "extensions/browser/view_type_utils.h"
  33 #include "ui/base/l10n/l10n_util.h"
  34 #include "ui/gfx/geometry/rect.h"
  35
  36 using content::BrowserThread;
  37
  38 SpellingMenuObserver::SpellingMenuObserver(RenderViewContextMenuProxy* proxy)
  39     : proxy_(proxy),
  40       loading_frame_(0),
  41       succeeded_(false),
  42       misspelling_hash_(0),
  43       client_(new SpellingServiceClient) {
  44   if (proxy_ && proxy_->GetBrowserContext()) {
  45     Profile* profile = Profile::FromBrowserContext(proxy_->GetBrowserContext());
  46     integrate_spelling_service_.Init(prefs::kSpellCheckUseSpellingService,
  47                                      profile->GetPrefs());
  48     autocorrect_spelling_.Init(prefs::kEnableAutoSpellCorrect,
  49                                profile->GetPrefs());
  50   }
  51 }
  52
  53 SpellingMenuObserver::~SpellingMenuObserver() {
  54 }
  55
  56 void SpellingMenuObserver::InitMenu(const content::ContextMenuParams& params) {
  57   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  58   DCHECK(!params.misspelled_word.empty() ||
  59       params.dictionary_suggestions.empty());
  60
  61   // Exit if we are not in an editable element because we add a menu item only
  62   // for editable elements.
  63   content::BrowserContext* browser_context = proxy_->GetBrowserContext();
  64   if (!params.is_editable || !browser_context)
  65     return;
  66
  67   // Exit if there is no misspelled word.
  68   if (params.misspelled_word.empty())
  69     return;
  70
  71   suggestions_ = params.dictionary_suggestions;
  72   misspelled_word_ = params.misspelled_word;
  73   misspelling_hash_ = params.misspelling_hash;
  74
  75   bool use_suggestions = SpellingServiceClient::IsAvailable(
  76       browser_context, SpellingServiceClient::SUGGEST);
  77
  78   if (!suggestions_.empty() || use_suggestions)
  79     proxy_->AddSeparator();
  80
  81   // Append Dictionary spell check suggestions.
  82   for (size_t i = 0; i < params.dictionary_suggestions.size() &&
  83        IDC_SPELLCHECK_SUGGESTION_0 + i <= IDC_SPELLCHECK_SUGGESTION_LAST;
  84        ++i) {
  85     proxy_->AddMenuItem(IDC_SPELLCHECK_SUGGESTION_0 + static_cast<int>(i),
  86                         params.dictionary_suggestions[i]);
  87   }
  88
  89   // The service types |SpellingServiceClient::SPELLCHECK| and
  90   // |SpellingServiceClient::SUGGEST| are mutually exclusive. Only one is
  91   // available at at time.
  92   //
  93   // When |SpellingServiceClient::SPELLCHECK| is available, the contextual
  94   // suggestions from |SpellingServiceClient| are already stored in
  95   // |params.dictionary_suggestions|.  |SpellingMenuObserver| places these
  96   // suggestions in the slots |IDC_SPELLCHECK_SUGGESTION_[0-LAST]|. If
  97   // |SpellingMenuObserver| queried |SpellingServiceClient| again, then quality
  98   // of suggestions would be reduced by lack of context around the misspelled
  99   // word.
 100   //
 101   // When |SpellingServiceClient::SUGGEST| is available,
 102   // |params.dictionary_suggestions| contains suggestions only from Hunspell
 103   // dictionary. |SpellingMenuObserver| queries |SpellingServiceClient| with the
 104   // misspelled word without the surrounding context. Spellcheck suggestions
 105   // from |SpellingServiceClient::SUGGEST| are not available until
 106   // |SpellingServiceClient| responds to the query. While |SpellingMenuObserver|
 107   // waits for |SpellingServiceClient|, it shows a placeholder text "Loading
 108   // suggestion..." in the |IDC_CONTENT_CONTEXT_SPELLING_SUGGESTION| slot. After
 109   // |SpellingServiceClient| responds to the query, |SpellingMenuObserver|
 110   // replaces the placeholder text with either the spelling suggestion or the
 111   // message "No more suggestions from Google." The "No more suggestions"
 112   // message is there when |SpellingServiceClient| returned the same suggestion
 113   // as Hunspell.
 114   if (use_suggestions) {
 115     // Append a placeholder item for the suggestion from the Spelling service
 116     // and send a request to the service if we can retrieve suggestions from it.
 117     // Also, see if we can use the spelling service to get an ideal suggestion.
 118     // Otherwise, we'll fall back to the set of suggestions.  Initialize
 119     // variables used in OnTextCheckComplete(). We copy the input text to the
 120     // result text so we can replace its misspelled regions with suggestions.
 121     succeeded_ = false;
 122     result_ = params.misspelled_word;
 123
 124     // Add a placeholder item. This item will be updated when we receive a
 125     // response from the Spelling service. (We do not have to disable this
 126     // item now since Chrome will call IsCommandIdEnabled() and disable it.)
 127     loading_message_ =
 128         l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_SPELLING_CHECKING);
 129     proxy_->AddMenuItem(IDC_CONTENT_CONTEXT_SPELLING_SUGGESTION,
 130                         loading_message_);
 131     // Invoke a JSON-RPC call to the Spelling service in the background so we
 132     // can update the placeholder item when we receive its response. It also
 133     // starts the animation timer so we can show animation until we receive
 134     // it.
 135     bool result = client_->RequestTextCheck(
 136         browser_context,
 137         SpellingServiceClient::SUGGEST,
 138         params.misspelled_word,
 139         base::Bind(&SpellingMenuObserver::OnTextCheckComplete,
 140                    base::Unretained(this),
 141                    SpellingServiceClient::SUGGEST));
 142     if (result) {
 143       loading_frame_ = 0;
 144       animation_timer_.Start(FROM_HERE, base::TimeDelta::FromSeconds(1),
 145           this, &SpellingMenuObserver::OnAnimationTimerExpired);
 146     }
 147   }
 148
 149   if (params.dictionary_suggestions.empty()) {
 150     proxy_->AddMenuItem(
 151         IDC_CONTENT_CONTEXT_NO_SPELLING_SUGGESTIONS,
 152         l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_NO_SPELLING_SUGGESTIONS));
 153     bool use_spelling_service = SpellingServiceClient::IsAvailable(
 154         browser_context, SpellingServiceClient::SPELLCHECK);
 155     if (use_suggestions || use_spelling_service)
 156       proxy_->AddSeparator();
 157   } else {
 158     proxy_->AddSeparator();
 159
 160     // |spellcheck_service| can be null when the suggested word is
 161     // provided by Web SpellCheck API.
 162     SpellcheckService* spellcheck_service =
 163         SpellcheckServiceFactory::GetForContext(browser_context);
 164     if (spellcheck_service && spellcheck_service->GetMetrics())
 165       spellcheck_service->GetMetrics()->RecordSuggestionStats(1);
 166   }
 167
 168   // If word is misspelled, give option for "Add to dictionary" and, if
 169   // multilingual spellchecking is not enabled, a check item "Ask Google for
 170   // suggestions".
 171   proxy_->AddMenuItem(IDC_SPELLCHECK_ADD_TO_DICTIONARY,
 172       l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_ADD_TO_DICTIONARY));
 173
 174   proxy_->AddCheckItem(
 175       IDC_CONTENT_CONTEXT_SPELLING_TOGGLE,
 176       l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_SPELLING_ASK_GOOGLE));
 177
 178   const base::CommandLine* command_line =
 179       base::CommandLine::ForCurrentProcess();
 180   if (command_line->HasSwitch(switches::kEnableSpellingAutoCorrect)) {
 181     proxy_->AddCheckItem(IDC_CONTENT_CONTEXT_AUTOCORRECT_SPELLING_TOGGLE,
 182         l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_SPELLING_AUTOCORRECT));
 183   }
 184
 185   proxy_->AddSeparator();
 186 }
 187
 188 bool SpellingMenuObserver::IsCommandIdSupported(int command_id) {
 189   if (command_id >= IDC_SPELLCHECK_SUGGESTION_0 &&
 190       command_id <= IDC_SPELLCHECK_SUGGESTION_LAST)
 191     return true;
 192
 193   switch (command_id) {
 194     case IDC_SPELLCHECK_ADD_TO_DICTIONARY:
 195     case IDC_CONTENT_CONTEXT_NO_SPELLING_SUGGESTIONS:
 196     case IDC_CONTENT_CONTEXT_SPELLING_SUGGESTION:
 197     case IDC_CONTENT_CONTEXT_SPELLING_TOGGLE:
 198     case IDC_CONTENT_CONTEXT_AUTOCORRECT_SPELLING_TOGGLE:
 199       return true;
 200
 201     default:
 202       return false;
 203   }
 204 }
 205
 206 bool SpellingMenuObserver::IsCommandIdChecked(int command_id) {
 207   DCHECK(IsCommandIdSupported(command_id));
 208   Profile* profile = Profile::FromBrowserContext(proxy_->GetBrowserContext());
 209
 210   if (command_id == IDC_CONTENT_CONTEXT_SPELLING_TOGGLE)
 211     return integrate_spelling_service_.GetValue() &&
 212            !profile->IsOffTheRecord();
 213   if (command_id == IDC_CONTENT_CONTEXT_AUTOCORRECT_SPELLING_TOGGLE)
 214     return autocorrect_spelling_.GetValue() && !profile->IsOffTheRecord();
 215   return false;
 216 }
 217
 218 bool SpellingMenuObserver::IsCommandIdEnabled(int command_id) {
 219   DCHECK(IsCommandIdSupported(command_id));
 220
 221   if (command_id >= IDC_SPELLCHECK_SUGGESTION_0 &&
 222       command_id <= IDC_SPELLCHECK_SUGGESTION_LAST)
 223     return true;
 224
 225   Profile* profile = Profile::FromBrowserContext(proxy_->GetBrowserContext());
 226   switch (command_id) {
 227     case IDC_SPELLCHECK_ADD_TO_DICTIONARY:
 228       return !misspelled_word_.empty();
 229
 230     case IDC_CONTENT_CONTEXT_NO_SPELLING_SUGGESTIONS:
 231       return false;
 232
 233     case IDC_CONTENT_CONTEXT_SPELLING_SUGGESTION:
 234       return succeeded_;
 235
 236     case IDC_CONTENT_CONTEXT_SPELLING_TOGGLE:
 237       return integrate_spelling_service_.IsUserModifiable() &&
 238              !profile->IsOffTheRecord();
 239
 240     case IDC_CONTENT_CONTEXT_AUTOCORRECT_SPELLING_TOGGLE:
 241       return integrate_spelling_service_.IsUserModifiable() &&
 242              !profile->IsOffTheRecord();
 243
 244     default:
 245       return false;
 246   }
 247 }
 248
 249 void SpellingMenuObserver::ExecuteCommand(int command_id) {
 250   DCHECK(IsCommandIdSupported(command_id));
 251
 252   if (command_id >= IDC_SPELLCHECK_SUGGESTION_0 &&
 253       command_id <= IDC_SPELLCHECK_SUGGESTION_LAST) {
 254     int suggestion_index = command_id - IDC_SPELLCHECK_SUGGESTION_0;
 255     proxy_->GetWebContents()->ReplaceMisspelling(
 256         suggestions_[suggestion_index]);
 257     // GetSpellCheckHost() can return null when the suggested word is provided
 258     // by Web SpellCheck API.
 259     content::BrowserContext* browser_context = proxy_->GetBrowserContext();
 260     if (browser_context) {
 261       SpellcheckService* spellcheck =
 262           SpellcheckServiceFactory::GetForContext(browser_context);
 263       if (spellcheck) {
 264         if (spellcheck->GetMetrics())
 265           spellcheck->GetMetrics()->RecordReplacedWordStats(1);
 266         spellcheck->GetFeedbackSender()->SelectedSuggestion(
 267             misspelling_hash_, suggestion_index);
 268       }
 269     }
 270     return;
 271   }
 272
 273   // When we choose the suggestion sent from the Spelling service, we replace
 274   // the misspelled word with the suggestion and add it to our custom-word
 275   // dictionary so this word is not marked as misspelled any longer.
 276   if (command_id == IDC_CONTENT_CONTEXT_SPELLING_SUGGESTION) {
 277     proxy_->GetWebContents()->ReplaceMisspelling(result_);
 278     misspelled_word_ = result_;
 279   }
 280
 281   if (command_id == IDC_CONTENT_CONTEXT_SPELLING_SUGGESTION ||
 282       command_id == IDC_SPELLCHECK_ADD_TO_DICTIONARY) {
 283     // GetHostForProfile() can return null when the suggested word is provided
 284     // by Web SpellCheck API.
 285     content::BrowserContext* browser_context = proxy_->GetBrowserContext();
 286     if (browser_context) {
 287       SpellcheckService* spellcheck =
 288           SpellcheckServiceFactory::GetForContext(browser_context);
 289       if (spellcheck) {
 290         spellcheck->GetCustomDictionary()->AddWord(base::UTF16ToUTF8(
 291             misspelled_word_));
 292         spellcheck->GetFeedbackSender()->AddedToDictionary(misspelling_hash_);
 293       }
 294     }
 295 #if defined(USE_BROWSER_SPELLCHECKER)
 296     spellcheck_platform::AddWord(misspelled_word_);
 297 #endif
 298   }
 299
 300   Profile* profile = Profile::FromBrowserContext(proxy_->GetBrowserContext());
 301
 302   // The spelling service can be toggled by the user only if it is not managed.
 303   if (command_id == IDC_CONTENT_CONTEXT_SPELLING_TOGGLE &&
 304       integrate_spelling_service_.IsUserModifiable()) {
 305     // When a user enables the "Ask Google for spelling suggestions" item, we
 306     // show a bubble to confirm it. On the other hand, when a user disables this
 307     // item, we directly update/ the profile and stop integrating the spelling
 308     // service immediately.
 309     if (!integrate_spelling_service_.GetValue()) {
 310       content::RenderViewHost* rvh = proxy_->GetRenderViewHost();
 311       gfx::Rect rect = rvh->GetView()->GetViewBounds();
 312       scoped_ptr<SpellingBubbleModel> model(
 313           new SpellingBubbleModel(profile, proxy_->GetWebContents(), false));
 314       chrome::ShowConfirmBubble(
 315           proxy_->GetWebContents()->GetTopLevelNativeWindow(),
 316           rvh->GetView()->GetNativeView(),
 317           gfx::Point(rect.CenterPoint().x(), rect.y()),
 318           model.Pass());
 319     } else {
 320       if (profile) {
 321         profile->GetPrefs()->SetBoolean(prefs::kSpellCheckUseSpellingService,
 322                                         false);
 323         profile->GetPrefs()->SetBoolean(prefs::kEnableAutoSpellCorrect,
 324                                         false);
 325       }
 326     }
 327   }
 328   // Autocorrect requires use of the spelling service and the spelling service
 329   // can be toggled by the user only if it is not managed.
 330   if (command_id == IDC_CONTENT_CONTEXT_AUTOCORRECT_SPELLING_TOGGLE &&
 331       integrate_spelling_service_.IsUserModifiable()) {
 332     // When the user enables autocorrect, we'll need to make sure that we can
 333     // ask Google for suggestions since that service is required. So we show
 334     // the bubble and just make sure to enable autocorrect as well.
 335     if (!integrate_spelling_service_.GetValue()) {
 336       content::RenderViewHost* rvh = proxy_->GetRenderViewHost();
 337       gfx::Rect rect = rvh->GetView()->GetViewBounds();
 338       scoped_ptr<SpellingBubbleModel> model(
 339           new SpellingBubbleModel(profile, proxy_->GetWebContents(), true));
 340       chrome::ShowConfirmBubble(
 341           proxy_->GetWebContents()->GetTopLevelNativeWindow(),
 342           rvh->GetView()->GetNativeView(),
 343           gfx::Point(rect.CenterPoint().x(), rect.y()),
 344           model.Pass());
 345     } else {
 346       if (profile) {
 347         bool current_value = autocorrect_spelling_.GetValue();
 348         profile->GetPrefs()->SetBoolean(prefs::kEnableAutoSpellCorrect,
 349                                         !current_value);
 350       }
 351     }
 352   }
 353 }
 354
 355 void SpellingMenuObserver::OnMenuCancel() {
 356   content::BrowserContext* browser_context = proxy_->GetBrowserContext();
 357   if (!browser_context)
 358     return;
 359   SpellcheckService* spellcheck =
 360       SpellcheckServiceFactory::GetForContext(browser_context);
 361   if (!spellcheck)
 362     return;
 363   spellcheck->GetFeedbackSender()->IgnoredSuggestions(misspelling_hash_);
 364 }
 365
 366 void SpellingMenuObserver::OnTextCheckComplete(
 367     SpellingServiceClient::ServiceType type,
 368     bool success,
 369     const base::string16& text,
 370     const std::vector<SpellCheckResult>& results) {
 371   animation_timer_.Stop();
 372
 373   // Scan the text-check results and replace the misspelled regions with
 374   // suggested words. If the replaced text is included in the suggestion list
 375   // provided by the local spellchecker, we show a "No suggestions from Google"
 376   // message.
 377   succeeded_ = success;
 378   if (results.empty()) {
 379     succeeded_ = false;
 380   } else {
 381     typedef std::vector<SpellCheckResult> SpellCheckResults;
 382     for (SpellCheckResults::const_iterator it = results.begin();
 383          it != results.end(); ++it) {
 384       result_.replace(it->location, it->length, it->replacement);
 385     }
 386     base::string16 result = base::i18n::ToLower(result_);
 387     for (std::vector<base::string16>::const_iterator it = suggestions_.begin();
 388          it != suggestions_.end(); ++it) {
 389       if (result == base::i18n::ToLower(*it)) {
 390         succeeded_ = false;
 391         break;
 392       }
 393     }
 394   }
 395   if (type != SpellingServiceClient::SPELLCHECK) {
 396     if (!succeeded_) {
 397       result_ = l10n_util::GetStringUTF16(
 398           IDS_CONTENT_CONTEXT_SPELLING_NO_SUGGESTIONS_FROM_GOOGLE);
 399     }
 400
 401     // Update the menu item with the result text. We disable this item and hide
 402     // it when the spelling service does not provide valid suggestions.
 403     proxy_->UpdateMenuItem(IDC_CONTENT_CONTEXT_SPELLING_SUGGESTION, succeeded_,
 404                            false, result_);
 405   }
 406 }
 407
 408 void SpellingMenuObserver::OnAnimationTimerExpired() {
 409   // Append '.' characters to the end of "Checking".
 410   loading_frame_ = (loading_frame_ + 1) & 3;
 411   base::string16 loading_message =
 412       loading_message_ + base::string16(loading_frame_,'.');
 413
 414   // Update the menu item with the text. We disable this item to prevent users
 415   // from selecting it.
 416   proxy_->UpdateMenuItem(IDC_CONTENT_CONTEXT_SPELLING_SUGGESTION, false, false,
 417                          loading_message);
 418 }