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/*
* Copyright 1999-2006 The Apache Software Foundation.
*
* Licensed 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.
*/
/* $Id$ */
package org.apache.fop.render.ps;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.io.IOException;
import org.apache.fop.fonts.Font;
import org.apache.fop.fonts.FontInfo;
import org.apache.fop.fonts.FontSetup;
import org.apache.fop.fonts.FontTriplet;
import org.apache.xmlgraphics.java2d.ps.PSGraphics2D;
import org.apache.xmlgraphics.java2d.ps.TextHandler;
import org.apache.xmlgraphics.ps.PSGenerator;
/**
* Specialized TextHandler implementation that the PSGraphics2D class delegates to to paint text
* using PostScript text operations.
*/
public class NativeTextHandler implements TextHandler {
private PSGraphics2D g2d;
/** FontInfo containing all available fonts */
protected FontInfo fontInfo;
/** Currently valid Font */
protected Font font;
/** Overriding FontState */
protected Font overrideFont = null;
/** the current (internal) font name */
protected String currentFontName;
/** the current font size in millipoints */
protected int currentFontSize;
/**
* Main constructor.
* @param g2d the PSGraphics2D instance this instances is used by
* @param fontInfo the FontInfo object with all available fonts
*/
public NativeTextHandler(PSGraphics2D g2d, FontInfo fontInfo) {
this.g2d = g2d;
if (fontInfo != null) {
this.fontInfo = fontInfo;
} else {
setupFontInfo();
}
}
private void setupFontInfo() {
//Sets up a FontInfo with default fonts
fontInfo = new FontInfo();
FontSetup.setup(fontInfo, null, null);
}
/**
* Return the font information associated with this object
* @return the FontInfo object
*/
public FontInfo getFontInfo() {
return fontInfo;
}
private PSGenerator getPSGenerator() {
return this.g2d.getPSGenerator();
}
/** @see org.apache.xmlgraphics.java2d.ps.TextHandler#writeSetup() */
public void writeSetup() throws IOException {
if (fontInfo != null) {
PSFontUtils.writeFontDict(getPSGenerator(), fontInfo);
}
}
/** @see org.apache.xmlgraphics.java2d.ps.TextHandler#writePageSetup() */
public void writePageSetup() throws IOException {
if (fontInfo != null) {
getPSGenerator().writeln("FOPFonts begin");
}
}
/**
* Draw a string to the PostScript document. The text is painted using
* text operations.
* @see org.apache.xmlgraphics.java2d.ps.TextHandler#drawString(java.lang.String, float, float)
*/
public void drawString(String s, float x, float y) throws IOException {
g2d.preparePainting();
if (this.overrideFont == null) {
java.awt.Font awtFont = g2d.getFont();
this.font = createFont(awtFont);
} else {
this.font = this.overrideFont;
this.overrideFont = null;
}
//Color and Font state
g2d.establishColor(g2d.getColor());
establishCurrentFont();
PSGenerator gen = getPSGenerator();
gen.saveGraphicsState();
//Clip
Shape imclip = g2d.getClip();
g2d.writeClip(imclip);
//Prepare correct transformation
AffineTransform trans = g2d.getTransform();
gen.concatMatrix(trans);
gen.writeln(gen.formatDouble(x) + " "
+ gen.formatDouble(y) + " moveto ");
gen.writeln("1 -1 scale");
StringBuffer sb = new StringBuffer("(");
escapeText(s, sb);
sb.append(") t ");
gen.writeln(sb.toString());
gen.restoreGraphicsState();
}
private void escapeText(final String text, StringBuffer target) {
final int l = text.length();
for (int i = 0; i < l; i++) {
final char ch = text.charAt(i);
final char mch = this.font.mapChar(ch);
PSGenerator.escapeChar(mch, target);
}
}
private Font createFont(java.awt.Font f) {
String fontFamily = f.getFamily();
if (fontFamily.equals("sanserif")) {
fontFamily = "sans-serif";
}
int fontSize = 1000 * f.getSize();
String style = f.isItalic() ? "italic" : "normal";
int weight = f.isBold() ? Font.BOLD : Font.NORMAL;
FontTriplet triplet = fontInfo.findAdjustWeight(fontFamily, style, weight);
if (triplet == null) {
triplet = fontInfo.findAdjustWeight("sans-serif", style, weight);
}
return fontInfo.getFontInstance(triplet, fontSize);
}
private void establishCurrentFont() throws IOException {
if ((currentFontName != this.font.getFontName())
|| (currentFontSize != this.font.getFontSize())) {
PSGenerator gen = getPSGenerator();
gen.writeln(this.font.getFontName() + " "
+ gen.formatDouble(font.getFontSize() / 1000f) + " F");
currentFontName = this.font.getFontName();
currentFontSize = this.font.getFontSize();
}
}
/**
* Sets the overriding font.
* @param override Overriding Font to set
*/
public void setOverrideFont(Font override) {
this.overrideFont = override;
}
}
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