/*
* Copyright (C) 2012 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.crsh.text.ui;
import org.crsh.text.LineReader;
import org.crsh.text.LineRenderer;
import org.crsh.text.RenderAppendable;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
class TreeLineRenderer extends LineRenderer {
/** . */
private final LineRenderer value;
/** . */
private final List<LineRenderer> children;
TreeLineRenderer(TreeElement tree) {
ArrayList<LineRenderer> children = new ArrayList<LineRenderer>(tree.children.size());
for (Element child : tree.children) {
children.add(child.renderer());
}
//
this.children = children;
this.value = tree.value != null ? tree.value.renderer() : null;
}
@Override
public int getActualWidth() {
int width = value != null ? value.getActualWidth() : 0;
for (LineRenderer child : children) {
width = Math.max(width, 2 + child.getActualWidth());
}
return width;
}
@Override
public int getMinWidth() {
int width = value != null ? value.getMinWidth() : 0;
for (LineRenderer child : children) {
width = Math.max(width, 2 + child.getMinWidth());
}
return width;
}
@Override
public int getActualHeight(int width) {
throw new UnsupportedOperationException("Implement me");
}
@Override
public int getMinHeight(int width) {
throw new UnsupportedOperationException("Implement me");
}
@Override
public LineReader reader(final int width) {
final LinkedList<LineReader> readers = new LinkedList<LineReader>();
for (LineRenderer child : children) {
readers.addLast(child.reader(width - 2));
}
//
return new LineReader() {
/** . */
LineReader value = TreeLineRenderer.this.value != null ? TreeLineRenderer.this.value.reader(width) : null;
/** . */
boolean node = true;
public boolean hasLine() {
if (value != null) {
if (value.hasLine()) {
return true;
} else {
value = null;
}
}
while (readers.size() > 0) {
if (readers.peekFirst().hasLine()) {
return true;
} else {
readers.removeFirst();
node = true;
}
}
return false;
}
public void renderLine(RenderAppendable to) {
if (value != null) {
if (value.hasLine()) {
value.renderLine(to);
} else {
value = null;
}
}
if (value == null) {
while (readers.size() > 0) {
LineReader first = readers.peekFirst();
if (first.hasLine()) {
if (node) {
to.append("+-");
node = false;
} else {
Iterator<LineReader> i = readers.descendingIterator();
boolean rest = false;
while (i.hasNext()) {
LineReader renderer = i.next();
if (i.hasNext()) {
if (renderer.hasLine()) {
rest = true;
break;
}
}
}
if (rest) {
to.append("| ");
} else {
to.append(" ");
}
}
first.renderLine(to);
break;
}
}
}
}
};
}
}