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Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses 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.
*/
/* $Id: Java2DBorderPainter.java 820672 2009-10-01 14:48:27Z jeremias $ */
package org.apache.fop.render.java2d;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.geom.GeneralPath;
import java.awt.geom.Line2D;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.fop.fo.Constants;
import org.apache.fop.render.intermediate.BorderPainter;
import org.apache.fop.traits.RuleStyle;
import org.apache.fop.util.ColorUtil;
/**
* Java2D-specific implementation of the {@link BorderPainter}.
*/
public class Java2DBorderPainter extends BorderPainter {
/** logging instance */
private static Log log = LogFactory.getLog(Java2DBorderPainter.class);
private Java2DPainter painter;
private GeneralPath currentPath = null;
public Java2DBorderPainter(Java2DPainter painter) {
this.painter = painter;
}
private Java2DGraphicsState getG2DState() {
return this.painter.g2dState;
}
private Graphics2D getG2D() {
return getG2DState().getGraph();
}
/** {@inheritDoc} */
protected void drawBorderLine(int x1, int y1, int x2, int y2, boolean horz,
boolean startOrBefore, int style, Color color) {
float w = x2 - x1;
float h = y2 - y1;
if ((w < 0) || (h < 0)) {
log.error("Negative extent received. Border won't be painted.");
return;
}
switch (style) {
case Constants.EN_DASHED:
getG2D().setColor(color);
if (horz) {
float unit = Math.abs(2 * h);
int rep = (int)(w / unit);
if (rep % 2 == 0) {
rep++;
}
unit = w / rep;
float ym = y1 + (h / 2);
BasicStroke s = new BasicStroke(h, BasicStroke.CAP_BUTT,
BasicStroke.JOIN_MITER, 10.0f, new float[] {unit}, 0);
getG2D().setStroke(s);
getG2D().draw(new Line2D.Float(x1, ym, x2, ym));
} else {
float unit = Math.abs(2 * w);
int rep = (int)(h / unit);
if (rep % 2 == 0) {
rep++;
}
unit = h / rep;
float xm = x1 + (w / 2);
BasicStroke s = new BasicStroke(w, BasicStroke.CAP_BUTT,
BasicStroke.JOIN_MITER, 10.0f, new float[] {unit}, 0);
getG2D().setStroke(s);
getG2D().draw(new Line2D.Float(xm, y1, xm, y2));
}
break;
case Constants.EN_DOTTED:
getG2D().setColor(color);
if (horz) {
float unit = Math.abs(2 * h);
int rep = (int)(w / unit);
if (rep % 2 == 0) {
rep++;
}
unit = w / rep;
float ym = y1 + (h / 2);
BasicStroke s = new BasicStroke(h, BasicStroke.CAP_ROUND,
BasicStroke.JOIN_MITER, 10.0f, new float[] {0, unit}, 0);
getG2D().setStroke(s);
getG2D().draw(new Line2D.Float(x1, ym, x2, ym));
} else {
float unit = Math.abs(2 * w);
int rep = (int)(h / unit);
if (rep % 2 == 0) {
rep++;
}
unit = h / rep;
float xm = x1 + (w / 2);
BasicStroke s = new BasicStroke(w, BasicStroke.CAP_ROUND,
BasicStroke.JOIN_MITER, 10.0f, new float[] {0, unit}, 0);
getG2D().setStroke(s);
getG2D().draw(new Line2D.Float(xm, y1, xm, y2));
}
break;
case Constants.EN_DOUBLE:
getG2D().setColor(color);
if (horz) {
float h3 = h / 3;
float ym1 = y1 + (h3 / 2);
float ym2 = ym1 + h3 + h3;
BasicStroke s = new BasicStroke(h3);
getG2D().setStroke(s);
getG2D().draw(new Line2D.Float(x1, ym1, x2, ym1));
getG2D().draw(new Line2D.Float(x1, ym2, x2, ym2));
} else {
float w3 = w / 3;
float xm1 = x1 + (w3 / 2);
float xm2 = xm1 + w3 + w3;
BasicStroke s = new BasicStroke(w3);
getG2D().setStroke(s);
getG2D().draw(new Line2D.Float(xm1, y1, xm1, y2));
getG2D().draw(new Line2D.Float(xm2, y1, xm2, y2));
}
break;
case Constants.EN_GROOVE:
case Constants.EN_RIDGE:
float colFactor = (style == Constants.EN_GROOVE ? 0.4f : -0.4f);
if (horz) {
Color uppercol = ColorUtil.lightenColor(color, -colFactor);
Color lowercol = ColorUtil.lightenColor(color, colFactor);
float h3 = h / 3;
float ym1 = y1 + (h3 / 2);
getG2D().setStroke(new BasicStroke(h3));
getG2D().setColor(uppercol);
getG2D().draw(new Line2D.Float(x1, ym1, x2, ym1));
getG2D().setColor(color);
getG2D().draw(new Line2D.Float(x1, ym1 + h3, x2, ym1 + h3));
getG2D().setColor(lowercol);
getG2D().draw(new Line2D.Float(x1, ym1 + h3 + h3, x2, ym1 + h3 + h3));
} else {
Color leftcol = ColorUtil.lightenColor(color, -colFactor);
Color rightcol = ColorUtil.lightenColor(color, colFactor);
float w3 = w / 3;
float xm1 = x1 + (w3 / 2);
getG2D().setStroke(new BasicStroke(w3));
getG2D().setColor(leftcol);
getG2D().draw(new Line2D.Float(xm1, y1, xm1, y2));
getG2D().setColor(color);
getG2D().draw(new Line2D.Float(xm1 + w3, y1, xm1 + w3, y2));
getG2D().setColor(rightcol);
getG2D().draw(new Line2D.Float(xm1 + w3 + w3, y1, xm1 + w3 + w3, y2));
}
break;
case Constants.EN_INSET:
case Constants.EN_OUTSET:
colFactor = (style == Constants.EN_OUTSET ? 0.4f : -0.4f);
if (horz) {
color = ColorUtil.lightenColor(color, (startOrBefore ? 1 : -1) * colFactor);
getG2D().setStroke(new BasicStroke(h));
float ym1 = y1 + (h / 2);
getG2D().setColor(color);
getG2D().draw(new Line2D.Float(x1, ym1, x2, ym1));
} else {
color = ColorUtil.lightenColor(color, (startOrBefore ? 1 : -1) * colFactor);
float xm1 = x1 + (w / 2);
getG2D().setStroke(new BasicStroke(w));
getG2D().setColor(color);
getG2D().draw(new Line2D.Float(xm1, y1, xm1, y2));
}
break;
case Constants.EN_HIDDEN:
break;
default:
getG2D().setColor(color);
if (horz) {
float ym = y1 + (h / 2);
getG2D().setStroke(new BasicStroke(h));
getG2D().draw(new Line2D.Float(x1, ym, x2, ym));
} else {
float xm = x1 + (w / 2);
getG2D().setStroke(new BasicStroke(w));
getG2D().draw(new Line2D.Float(xm, y1, xm, y2));
}
}
}
/** {@inheritDoc} */
public void drawLine(Point start, Point end, int width, Color color, RuleStyle style) {
if (start.y != end.y) {
//TODO Support arbitrary lines if necessary
throw new UnsupportedOperationException(
"Can only deal with horizontal lines right now");
}
saveGraphicsState();
int half = width / 2;
int starty = start.y - half;
Rectangle boundingRect = new Rectangle(start.x, start.y - half, end.x - start.x, width);
getG2DState().updateClip(boundingRect);
switch (style.getEnumValue()) {
case Constants.EN_SOLID:
case Constants.EN_DASHED:
case Constants.EN_DOUBLE:
drawBorderLine(start.x, start.y - half, end.x, end.y + half,
true, true, style.getEnumValue(), color);
break;
case Constants.EN_DOTTED:
int shift = half; //This shifts the dots to the right by half a dot's width
drawBorderLine(start.x + shift, start.y - half, end.x + shift, end.y + half,
true, true, style.getEnumValue(), color);
break;
case Constants.EN_GROOVE:
case Constants.EN_RIDGE:
getG2DState().updateColor(ColorUtil.lightenColor(color, 0.6f));
moveTo(start.x, starty);
lineTo(end.x, starty);
lineTo(end.x, starty + 2 * half);
lineTo(start.x, starty + 2 * half);
closePath();
getG2D().fill(currentPath);
currentPath = null;
getG2DState().updateColor(color);
if (style.getEnumValue() == Constants.EN_GROOVE) {
moveTo(start.x, starty);
lineTo(end.x, starty);
lineTo(end.x, starty + half);
lineTo(start.x + half, starty + half);
lineTo(start.x, starty + 2 * half);
} else {
moveTo(end.x, starty);
lineTo(end.x, starty + 2 * half);
lineTo(start.x, starty + 2 * half);
lineTo(start.x, starty + half);
lineTo(end.x - half, starty + half);
}
closePath();
getG2D().fill(currentPath);
currentPath = null;
case Constants.EN_NONE:
// No rule is drawn
break;
default:
} // end switch
restoreGraphicsState();
}
/** {@inheritDoc} */
protected void clip() {
if (currentPath == null) {
throw new IllegalStateException("No current path available!");
}
getG2DState().updateClip(currentPath);
currentPath = null;
}
/** {@inheritDoc} */
protected void closePath() {
currentPath.closePath();
}
/** {@inheritDoc} */
protected void lineTo(int x, int y) {
if (currentPath == null) {
currentPath = new GeneralPath();
}
currentPath.lineTo(x, y);
}
/** {@inheritDoc} */
protected void moveTo(int x, int y) {
if (currentPath == null) {
currentPath = new GeneralPath();
}
currentPath.moveTo(x, y);
}
/** {@inheritDoc} */
protected void saveGraphicsState() {
this.painter.saveGraphicsState();
}
/** {@inheritDoc} */
protected void restoreGraphicsState() {
this.painter.restoreGraphicsState();
this.currentPath = null;
}
}