/*
* SpellChecker.java
*
* Copyright (C) 2009-12 by RStudio, Inc.
*
* Unless you have received this program directly from RStudio pursuant
* to the terms of a commercial license agreement with RStudio, then
* this program is licensed to you under the terms of version 3 of the
* GNU Affero General Public License. This program is distributed WITHOUT
* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
*
*/
package org.rstudio.studio.client.common.spelling;
import com.google.gwt.core.client.JsArrayString;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.inject.Inject;
import org.rstudio.studio.client.RStudioGinjector;
import org.rstudio.studio.client.common.spelling.model.SpellCheckerResult;
import org.rstudio.studio.client.server.ServerError;
import org.rstudio.studio.client.server.ServerRequestCallback;
import org.rstudio.studio.client.workbench.WorkbenchList;
import org.rstudio.studio.client.workbench.WorkbenchListManager;
import org.rstudio.studio.client.workbench.events.ListChangedEvent;
import org.rstudio.studio.client.workbench.events.ListChangedHandler;
import org.rstudio.studio.client.workbench.prefs.model.UIPrefs;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
public class SpellChecker
{
public interface Context
{
ArrayList<String> readDictionary();
void writeDictionary(ArrayList<String> words);
void invalidateAllWords();
void invalidateMisspelledWords();
void releaseOnDismiss(HandlerRegistration handler);
}
public SpellChecker(Context context)
{
RStudioGinjector.INSTANCE.injectMembers(this);
// save reference to context and read its dictionary
context_ = context;
contextDictionary_ = context_.readDictionary();
// subscribe to spelling service changes (these occur when when the
// spelling dictionaries are changed)
context_.releaseOnDismiss(spellingService_.addChangeHandler(
new ChangeHandler() {
@Override
public void onChange(ChangeEvent event)
{
context_.invalidateAllWords();
}
}));
// subscribe to spelling prefs changes (invalidateAll on changes)
uiPrefs_.ignoreWordsInUppercase().addValueChangeHandler(
prefChangedHandler_);
uiPrefs_.ignoreWordsWithNumbers().addValueChangeHandler(
prefChangedHandler_);
// subscribe to user dictionary changes
context_.releaseOnDismiss(userDictionary_.addListChangedHandler(
new ListChangedHandler() {
@Override
public void onListChanged(ListChangedEvent event)
{
// detect whether this is the first delivery of the list
// or if it is an update
boolean isUpdate = userDictionaryWords_ != null;
userDictionaryWords_ = event.getList();
updateIgnoredWordsIndex();
if (isUpdate)
context_.invalidateMisspelledWords();
}
}));
}
@Inject
void intialize(SpellingService spellingService,
WorkbenchListManager workbenchListManager,
UIPrefs uiPrefs)
{
spellingService_ = spellingService;
userDictionary_ = workbenchListManager.getUserDictionaryList();
uiPrefs_ = uiPrefs;
}
public void checkSpelling(
List<String> words,
final ServerRequestCallback<SpellCheckerResult> callback)
{
// allocate results
final SpellCheckerResult spellCheckerResult = new SpellCheckerResult();
if (words.isEmpty())
{
callback.onResponseReceived(spellCheckerResult);
return;
}
// only send words to the server that aren't ignored
final ArrayList<String> wordsToCheck = new ArrayList<String>();
for (int i = 0; i<words.size(); i++)
{
String word = words.get(i);
if (isWordIgnored(word))
spellCheckerResult.getCorrect().add(word);
else
wordsToCheck.add(word);
}
// call the service to check the non-ignored words
spellingService_.checkSpelling(
wordsToCheck,
new ServerRequestCallback<SpellCheckerResult>() {
@Override
public void onResponseReceived(SpellCheckerResult result)
{
spellCheckerResult.getCorrect().addAll(result.getCorrect());
spellCheckerResult.getIncorrect().addAll(result.getIncorrect());
callback.onResponseReceived(spellCheckerResult);
}
@Override
public void onError(ServerError error)
{
callback.onError(error);
}
});
}
public void suggestionList(String word,
ServerRequestCallback<JsArrayString> callback)
{
spellingService_.suggestionList(word, callback);
}
public void addToUserDictionary(final String word)
{
userDictionary_.append(word);
}
public void addIgnoredWord(String word)
{
contextDictionary_.add(word);
context_.writeDictionary(contextDictionary_);
updateIgnoredWordsIndex();
context_.invalidateMisspelledWords();
}
private boolean isWordIgnored(String word)
{
if (allIgnoredWords_.contains(word))
return true;
else if (ignoreUppercaseWord(word))
return true;
else if (ignoreWordWithNumbers(word))
return true;
else
return false;
}
private boolean ignoreUppercaseWord(String word)
{
if (!uiPrefs_.ignoreWordsInUppercase().getValue())
return false;
for (char c: word.toCharArray())
{
if(!Character.isUpperCase(c))
return false;
}
return true;
}
private boolean ignoreWordWithNumbers(String word)
{
if (!uiPrefs_.ignoreWordsWithNumbers().getValue())
return false;
for (char c: word.toCharArray())
{
if(Character.isDigit(c))
return true;
}
return false;
}
private void updateIgnoredWordsIndex()
{
allIgnoredWords_.clear();
allIgnoredWords_.addAll(userDictionaryWords_);
allIgnoredWords_.addAll(contextDictionary_);
}
private ValueChangeHandler<Boolean> prefChangedHandler_ =
new ValueChangeHandler<Boolean>() {
@Override
public void onValueChange(ValueChangeEvent<Boolean> event)
{
context_.invalidateAllWords();
}
};
private final Context context_;
private WorkbenchList userDictionary_;
private ArrayList<String> userDictionaryWords_;
private ArrayList<String> contextDictionary_ = new ArrayList<String>();
private final HashSet<String> allIgnoredWords_ = new HashSet<String>();
private SpellingService spellingService_;
private UIPrefs uiPrefs_;
}