/*
* Created on Jul 2, 2007
* Created by Paul Gardner
* Copyright (C) 2007 Aelitis, All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* AELITIS, SAS au capital de 63.529,40 euros
* 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
*
*/
package org.gudy.azureus2.ui.swt.components;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.graphics.Cursor;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.gudy.azureus2.core3.html.HTMLUtils;
import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.ui.swt.Utils;
import org.gudy.azureus2.ui.swt.mainwindow.Colors;
public class
LinkArea
{
private StyledText styled_text;
// list of linkInfo for tracking where the links are
// could have just used stDecription.getStyleRanges() since we underline
// the links, but I didn't want to risk a chance of any other styles
// being in there that I don't know about (plus managing the URL)
private ArrayList links = new ArrayList();
private int ofs;
private String relative_url_base = "";
public
LinkArea(
Composite comp )
{
styled_text = new StyledText(comp,SWT.BORDER | SWT.READ_ONLY | SWT.H_SCROLL | SWT.V_SCROLL);
styled_text.setWordWrap(true);
styled_text.addListener(SWT.MouseUp, new Listener() {
public void handleEvent(Event event) {
if (links.size() == 0) {
return;
}
try {
int ofs = styled_text.getOffsetAtLocation(new Point(event.x, event.y));
for (int i = 0; i < links.size(); i++) {
linkInfo linkInfo = (linkInfo)links.get(i);
if (ofs >= linkInfo.ofsStart && ofs <= linkInfo.ofsEnd) {
Utils.launch(linkInfo.url);
break;
}
}
} catch (Exception e) {
}
}
});
final Cursor handCursor = new Cursor(comp.getDisplay(), SWT.CURSOR_HAND);
styled_text.addListener(SWT.MouseMove, new Listener() {
Cursor curCursor = null;
public void handleEvent(Event event) {
if (links.size() == 0) {
return;
}
boolean onLink = false;
try {
int ofs = styled_text.getOffsetAtLocation(new Point(event.x, event.y));
for (int i = 0; i < links.size(); i++) {
linkInfo linkInfo = (linkInfo)links.get(i);
if (ofs >= linkInfo.ofsStart && ofs <= linkInfo.ofsEnd) {
onLink = true;
break;
}
}
} catch (Exception e) {
}
try {
Cursor cursor = onLink ? handCursor : null;
if (curCursor != cursor) {
styled_text.setCursor(cursor);
curCursor = cursor;
}
} catch (Exception e) {
}
}
});
styled_text.addListener(SWT.Dispose, new Listener() {
public void handleEvent(Event event) {
styled_text.setCursor(null);
handCursor.dispose();
}
});
}
public Composite
getComponent()
{
return( styled_text );
}
public void
reset()
{
if( styled_text.isDisposed()){
return;
}
ofs = 0;
styled_text.setText("");
links.clear();
}
public void
setRelativeURLBase(
String str )
{
relative_url_base = str;
}
public void
addLine(
String line )
{
if( styled_text.isDisposed()){
return;
}
try{
line = HTMLUtils.expand( line );
Object[] url_details = HTMLUtils.getLinks( line );
String modified_line = (String)url_details[0];
styled_text.append(modified_line + "\n");
List urls = (List)url_details[1];
for (int i=0;i<urls.size();i++){
Object[] entry = (Object[])urls.get(i);
String url = (String)entry[0];
int[] det = (int[])entry[1];
if ( !url.toLowerCase().startsWith("http") && relative_url_base.length() > 0 ){
url = relative_url_base + url;
}
linkInfo info = new linkInfo(ofs + det[0], ofs + det[0] + det[1], url );
links.add(info);
StyleRange sr = new StyleRange();
sr.start = info.ofsStart;
sr.length = info.ofsEnd - info.ofsStart;
sr.underline = true;
sr.foreground = Colors.blue;
styled_text.setStyleRange(sr);
}
ofs += modified_line.length() + 1;
}catch( Throwable e ){
// just in case something borks
Debug.printStackTrace( e );
styled_text.append(line + "\n");
}
}
public static class linkInfo {
int ofsStart;
int ofsEnd;
String url;
linkInfo(int s, int e, String url) {
ofsStart = s;
ofsEnd = e;
this.url = url;
}
}
}