/**
* Copyright 2015 Santhosh Kumar Tekuri
*
* The JLibs authors license this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package jlibs.nblr.editor.debug;
/**
* @author Santhosh Kumar T
*/
import javax.swing.plaf.TextUI;
import javax.swing.text.BadLocationException;
import javax.swing.text.Highlighter;
import javax.swing.text.JTextComponent;
import java.awt.*;
public class NewLineHighlightPainter implements Highlighter.HighlightPainter{
private Color color;
public NewLineHighlightPainter(Color color){
this.color = color;
}
public NewLineHighlightPainter(){
this(new Color(225, 236, 247));
}
public void paint(Graphics g, int offs0, int offs1, Shape bounds, JTextComponent c){
Rectangle alloc = bounds.getBounds();
try{
// --- determine locations ---
TextUI mapper = c.getUI();
Rectangle p0 = mapper.modelToView(c, offs0);
Rectangle p1 = mapper.modelToView(c, offs1);
// --- render ---
g.setColor(color);
if(p0.y==p1.y){
// same line, render a rectangle
Rectangle r = p0.union(p1);
g.fillRect(r.x, r.y, r.width, r.height);
} else{
// different lines
int p0ToMarginWidth = alloc.x+alloc.width-p0.x;
g.fillRect(p0.x, p0.y, p0ToMarginWidth, p0.height);
if((p0.y+p0.height)!=p1.y){
g.fillRect(alloc.x, p0.y+p0.height, alloc.width,
p1.y-(p0.y+p0.height));
}
g.fillRect(alloc.x, p1.y, (p1.x-alloc.x), p1.height);
}
} catch(BadLocationException e){
// can't render
}
}
}
