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/*******************************************************************************
* Copyright (c) 2004, 2007 Boeing.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.framework.ui.skynet.widgets;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.StringTokenizer;
import org.eclipse.osee.framework.ui.skynet.util.OseeDictionary;
import org.eclipse.osee.framework.ui.swt.styledText.ASpellWord;
import org.eclipse.osee.framework.ui.swt.styledText.IDictionary;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.MenuEvent;
import org.eclipse.swt.events.MenuListener;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
/**
* PaintListener that will underline all misspelled words in a StyledText widget. This class must be extended to provide
* for getting the dictionary and activating/deactivating certain functionality.
*
* @author Donald G. Dunne
*/
public class XTextSpellCheckListener implements ModifyListener {
private final IDictionary dict;
private final XText xText;
private final Set<ASpellWord> errors = new LinkedHashSet<ASpellWord>();
private XTextSpellModifyDictionary modDict;
private Integer maxLength = 50000;
public XTextSpellCheckListener(final XText xText, IDictionary dict) {
this.xText = xText;
this.dict = dict;
if (modDict != null) {
addXTextSpellModifyDictionary(modDict);
}
refreshStyleRanges();
}
public void addXTextSpellModifyDictionary(XTextSpellModifyDictionary modDict) {
if (xText == null || xText.getStyledText() == null || xText.getStyledText().isDisposed()) {
return;
}
this.modDict = modDict;
xText.getStyledText().addMouseListener(mouseListener);
xText.getStyledText().addDisposeListener(new DisposeListener() {
@Override
public void widgetDisposed(DisposeEvent e) {
if (xText == null || xText.getStyledText() == null || xText.getStyledText().isDisposed()) {
return;
}
xText.getStyledText().removeMouseListener(mouseListener);
}
});
}
private final MouseListener mouseListener = new MouseListener() {
@Override
public void mouseUp(org.eclipse.swt.events.MouseEvent e) {
StyledText styledText = (StyledText) e.widget;
int offset = 0;
try {
offset = styledText.getOffsetAtLocation(new Point(e.x, e.y));
} catch (IllegalArgumentException ex) {
// Illegal arguement exception happens when selected point is outside
// the range of the rectangle. Since it does it's own calculation, just
// throw this exception away.
return;
}
for (ASpellWord sw : errors) {
if (sw.start < offset && sw.start + sw.word.length() > offset) {
// System.out.println("Found error word " + sw.word);
handleErrorSelected(sw);
break;
}
}
};
@Override
public void mouseDoubleClick(MouseEvent e) {
// do nothing
}
@Override
public void mouseDown(MouseEvent e) {
// do nothing
}
};
private void handleErrorSelected(final ASpellWord sw) {
Menu menu = xText.getStyledText().getMenu();
new MenuItem(menu, SWT.SEPARATOR);
MenuItem addLocal = new MenuItem(menu, SWT.NONE);
addLocal.setText("Add \"" + sw.word + "\" to Personal dictionary.");
addLocal.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
if (modDict.addToLocalDictionary(sw.word)) {
xText.getStyledText().redraw();
}
}
});
MenuItem addGlobal = new MenuItem(menu, SWT.NONE);
addGlobal.setText("Add \"" + sw.word + "\" to Global dictionary.");
addGlobal.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
if (modDict.addToGlobalDictionary(sw.word)) {
xText.getStyledText().redraw();
}
}
});
menu.addMenuListener(new MenuListener() {
@Override
public void menuHidden(MenuEvent e) {
xText.getStyledText().setMenu(xText.getDefaultMenu());
}
@Override
public void menuShown(MenuEvent e) {
// do nothing
};
});
}
private void refreshStyleRanges() {
String text = xText.getStyledText().getText();
// Only handle urls if widget is under maxLength size
if (text.length() > maxLength) {
xText.getStyledText().setStyleRanges(new StyleRange[] {});
return;
}
// Get spelling errors
getErrors(text);
StyleRange[] styles = new StyleRange[errors.size()];
int index = 0;
for (ASpellWord sw : errors) {
StyleRange styleRange = new StyleRange();
styleRange.underline = true;
styleRange.data = sw.word;
styleRange.start = sw.start;
styleRange.length = sw.word.length();
styleRange.underlineColor = Display.getCurrent().getSystemColor(SWT.COLOR_BLUE);
styles[index++] = styleRange;
}
xText.getStyledText().setStyleRanges(styles);
}
private void getErrors(String str) {
errors.clear();
StringTokenizer st = new StringTokenizer(str, "[\t\r\n ]", true);
int loc = 0;
while (st.hasMoreTokens()) {
String string = st.nextToken();
// if not a whitespace character
if (!string.matches("^\\s*$")) {
// System.out.println("isWord: orig *" + string + "* => *" + string + "*");
if (!dict.isWord(string)) {
// System.out.println("word " + string + " is error");
String cleanError = OseeDictionary.getInstance().getCleanWord(string);
ASpellWord sw = new ASpellWord(cleanError, loc);
errors.add(sw);
}
}
loc += string.length();
}
}
@Override
public void modifyText(ModifyEvent e) {
if (xText == null || xText.getStyledText() == null || xText.getStyledText().isDisposed()) {
return;
}
if (xText != null) {
refreshStyleRanges();
}
}
/**
* @return the maxLength
*/
public Integer getMaxLength() {
return maxLength;
}
/**
* @param maxLength the maxLength to set
*/
public void setMaxLength(Integer maxLength) {
this.maxLength = maxLength;
}
}
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