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org.xhtmlrenderer.pdf.ITextFontResolver Maven / Gradle / Ivy
/*
* {{{ header & license
* Copyright (c) 2006 Wisconsin Court System
*
* This program 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 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
* }}}
*/
package org.xhtmlrenderer.pdf;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.xhtmlrenderer.css.constants.CSSName;
import org.xhtmlrenderer.css.constants.IdentValue;
import org.xhtmlrenderer.css.sheet.FontFaceRule;
import org.xhtmlrenderer.css.style.CalculatedStyle;
import org.xhtmlrenderer.css.style.FSDerivedValue;
import org.xhtmlrenderer.css.value.FontSpecification;
import org.xhtmlrenderer.extend.FontResolver;
import org.xhtmlrenderer.layout.SharedContext;
import org.xhtmlrenderer.render.FSFont;
import org.xhtmlrenderer.util.XRLog;
import org.xhtmlrenderer.util.XRRuntimeException;
import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.BaseFont;
public class ITextFontResolver implements FontResolver {
private Map _fontFamilies = createInitialFontMap();
private Map _fontCache = new HashMap();
private SharedContext _sharedContext;
public ITextFontResolver(SharedContext sharedContext) {
_sharedContext = sharedContext;
}
public FSFont resolveFont(SharedContext renderingContext, FontSpecification spec) {
return resolveFont(renderingContext, spec.families, spec.size, spec.fontWeight, spec.fontStyle, spec.variant);
}
public void flushCache() {
_fontFamilies = createInitialFontMap();
_fontCache = new HashMap();
}
public void flushFontFaceFonts() {
_fontCache = new HashMap();
for (Iterator i = _fontFamilies.values().iterator(); i.hasNext(); ) {
FontFamily family = (FontFamily)i.next();
for (Iterator j = family.getFontDescriptions().iterator(); j.hasNext(); ) {
FontDescription d = (FontDescription)j.next();
if (d.isFromFontFace()) {
j.remove();
}
}
if (family.getFontDescriptions().size() == 0) {
i.remove();
}
}
}
public void importFontFaces(List fontFaces) {
for (Iterator i = fontFaces.iterator(); i.hasNext(); ) {
FontFaceRule rule = (FontFaceRule)i.next();
CalculatedStyle style = rule.getCalculatedStyle();
FSDerivedValue src = style.valueByName(CSSName.SRC);
if (src == IdentValue.NONE) {
continue;
}
byte[] font1 = _sharedContext.getUac().getBinaryResource(src.asString());
if (font1 == null) {
XRLog.exception("Could not load font " + src.asString());
continue;
}
byte[] font2 = null;
FSDerivedValue metricsSrc = style.valueByName(CSSName.FS_FONT_METRIC_SRC);
if (metricsSrc != IdentValue.NONE) {
font2 = _sharedContext.getUac().getBinaryResource(metricsSrc.asString());
if (font2 == null) {
XRLog.exception("Could not load font metric data " + src.asString());
continue;
}
}
if (font2 != null) {
byte[] t = font1;
font1 = font2;
font2 = t;
}
boolean embedded = style.isIdent(CSSName.FS_PDF_FONT_EMBED, IdentValue.EMBED);
String encoding = style.getStringProperty(CSSName.FS_PDF_FONT_ENCODING);
try {
addFontFaceFont(src.asString(), encoding, embedded, font1, font2);
} catch (DocumentException e) {
XRLog.exception("Could not load font " + src.asString(), e);
continue;
} catch (IOException e) {
XRLog.exception("Could not load font " + src.asString(), e);
}
}
}
public void addFontDirectory(String dir, boolean embedded)
throws DocumentException, IOException {
File f = new File(dir);
if (f.isDirectory()) {
File[] files = f.listFiles(new FilenameFilter() {
public boolean accept(File dir, String name) {
String lower = name.toLowerCase();
return lower.endsWith(".otf") || lower.endsWith(".ttf");
}
});
for (int i = 0; i < files.length; i++) {
addFont(files[i].getAbsolutePath(), embedded);
}
}
}
public void addFont(String path, boolean embedded)
throws DocumentException, IOException {
addFont(path, BaseFont.CP1252, embedded);
}
public void addFont(String path, String encoding, boolean embedded)
throws DocumentException, IOException {
addFont(path, encoding, embedded, null);
}
public void addFont(String path, String encoding, boolean embedded, String pathToPFB)
throws DocumentException, IOException {
String lower = path.toLowerCase();
if (lower.endsWith(".otf") || lower.endsWith(".ttf") || lower.indexOf(".ttc,") != -1) {
BaseFont font = BaseFont.createFont(path, encoding, embedded);
String fontFamilyName = TrueTypeUtil.getFamilyName(font);
FontFamily fontFamily = getFontFamily(fontFamilyName);
FontDescription descr = new FontDescription(font);
try {
TrueTypeUtil.populateDescription(path, font, descr);
} catch (Exception e) {
throw new XRRuntimeException(e.getMessage(), e);
}
fontFamily.addFontDescription(descr);
} else if (lower.endsWith(".ttc")) {
String[] names = BaseFont.enumerateTTCNames(path);
for (int i = 0; i < names.length; i++) {
addFont(path + "," + i, encoding, embedded);
}
} else if (lower.endsWith(".afm") || lower.endsWith(".pfm")) {
if (embedded && pathToPFB == null) {
throw new IOException("When embedding a font, path to PFB/PFA file must be specified");
}
BaseFont font = BaseFont.createFont(
path, encoding, embedded, false, null, readFile(pathToPFB));
String fontFamilyName = font.getFamilyFontName()[0][3];
FontFamily fontFamily = getFontFamily(fontFamilyName);
FontDescription descr = new FontDescription(font);
// XXX Need to set weight, underline position, etc. This information
// is contained in the AFM file (and even parsed by Type1Font), but
// unfortunately it isn't exposed to the caller.
fontFamily.addFontDescription(descr);
} else {
throw new IOException("Unsupported font type");
}
}
private void addFontFaceFont(
String uri, String encoding, boolean embedded, byte[] afmttf, byte[] pfb)
throws DocumentException, IOException {
String lower = uri.toLowerCase();
if (lower.endsWith(".otf") || lower.endsWith(".ttf") || lower.indexOf(".ttc,") != -1) {
BaseFont font = BaseFont.createFont(uri, encoding, embedded, false, afmttf, pfb);
String fontFamilyName = TrueTypeUtil.getFamilyName(font);
FontFamily fontFamily = getFontFamily(fontFamilyName);
FontDescription descr = new FontDescription(font);
try {
TrueTypeUtil.populateDescription(uri, afmttf, font, descr);
} catch (Exception e) {
throw new XRRuntimeException(e.getMessage(), e);
}
descr.setFromFontFace(true);
fontFamily.addFontDescription(descr);
} else if (lower.endsWith(".afm") || lower.endsWith(".pfm") || lower.endsWith(".pfb") || lower.endsWith(".pfa")) {
if (embedded && pfb == null) {
throw new IOException("When embedding a font, path to PFB/PFA file must be specified");
}
String name = uri.substring(0, uri.length()-4) + ".afm";
BaseFont font = BaseFont.createFont(
name, encoding, embedded, false, afmttf, pfb);
String fontFamilyName = font.getFamilyFontName()[0][3];
FontFamily fontFamily = getFontFamily(fontFamilyName);
FontDescription descr = new FontDescription(font);
descr.setFromFontFace(true);
// XXX Need to set weight, underline position, etc. This information
// is contained in the AFM file (and even parsed by Type1Font), but
// unfortunately it isn't exposed to the caller.
fontFamily.addFontDescription(descr);
} else {
throw new IOException("Unsupported font type");
}
}
private byte[] readFile(String path) throws IOException {
File f = new File(path);
if (f.exists()) {
ByteArrayOutputStream result = new ByteArrayOutputStream((int)f.length());
InputStream is = null;
try {
is = new FileInputStream(path);
byte[] buf = new byte[10240];
int i;
while ( (i = is.read(buf)) != -1) {
result.write(buf, 0, i);
}
is.close();
is = null;
return result.toByteArray();
} finally {
if (is != null) {
try {
is.close();
} catch (IOException e) {
// ignore
}
}
}
} else {
throw new IOException("File " + path + " does not exist or is not accessible");
}
}
public FontFamily getFontFamily(String fontFamilyName) {
FontFamily fontFamily = (FontFamily)_fontFamilies.get(fontFamilyName);
if (fontFamily == null) {
fontFamily = new FontFamily();
fontFamily.setName(fontFamilyName);
_fontFamilies.put(fontFamilyName, fontFamily);
}
return fontFamily;
}
private FSFont resolveFont(SharedContext ctx, String[] families, float size, IdentValue weight, IdentValue style, IdentValue variant) {
if (! (style == IdentValue.NORMAL || style == IdentValue.OBLIQUE
|| style == IdentValue.ITALIC)) {
style = IdentValue.NORMAL;
}
if (families != null) {
for (int i = 0; i < families.length; i++) {
FSFont font = resolveFont(ctx, families[i], size, weight, style, variant);
if (font != null) {
return font;
}
}
}
return resolveFont(ctx, "Serif", size, weight, style, variant);
}
private String normalizeFontFamily(String fontFamily) {
String result = fontFamily;
// strip off the "s if they are there
if (result.startsWith("\"")) {
result = result.substring(1);
}
if (result.endsWith("\"")) {
result = result.substring(0, result.length() - 1);
}
// normalize the font name
if (result.equalsIgnoreCase("serif")) {
result = "Serif";
}
else if (result.equalsIgnoreCase("sans-serif")) {
result = "SansSerif";
}
else if (result.equalsIgnoreCase("monospace")) {
result = "Monospaced";
}
return result;
}
private FSFont resolveFont(SharedContext ctx, String fontFamily, float size, IdentValue weight, IdentValue style, IdentValue variant) {
String normalizedFontFamily = normalizeFontFamily(fontFamily);
String cacheKey = getHashName(normalizedFontFamily, weight, style);
FontDescription result = (FontDescription)_fontCache.get(cacheKey);
if (result != null) {
return new ITextFSFont(result, size);
}
FontFamily family = (FontFamily)_fontFamilies.get(normalizedFontFamily);
if (family != null) {
result = family.match(convertWeightToInt(weight), style);
if (result != null) {
_fontCache.put(cacheKey, result);
return new ITextFSFont(result, size);
}
}
return null;
}
private int convertWeightToInt(IdentValue weight) {
if (weight == IdentValue.NORMAL) {
return 400;
} else if (weight == IdentValue.BOLD) {
return 700;
} else if (weight == IdentValue.FONT_WEIGHT_100) {
return 100;
} else if (weight == IdentValue.FONT_WEIGHT_200) {
return 200;
} else if (weight == IdentValue.FONT_WEIGHT_300) {
return 300;
} else if (weight == IdentValue.FONT_WEIGHT_400) {
return 400;
} else if (weight == IdentValue.FONT_WEIGHT_500) {
return 500;
} else if (weight == IdentValue.FONT_WEIGHT_600) {
return 600;
} else if (weight == IdentValue.FONT_WEIGHT_700) {
return 700;
} else if (weight == IdentValue.FONT_WEIGHT_800) {
return 800;
} else if (weight == IdentValue.FONT_WEIGHT_900) {
return 900;
} else if (weight == IdentValue.LIGHTER) {
// FIXME
return 400;
} else if (weight == IdentValue.BOLDER) {
// FIXME
return 700;
}
throw new IllegalArgumentException();
}
protected static String getHashName(
String name, IdentValue weight, IdentValue style) {
return name + "-" + weight + "-" + style;
}
private static Map createInitialFontMap() {
HashMap result = new HashMap();
try {
addCourier(result);
addTimes(result);
addHelvetica(result);
} catch (DocumentException e) {
throw new RuntimeException(e.getMessage(), e);
} catch (IOException e) {
throw new RuntimeException(e.getMessage(), e);
}
return result;
}
private static BaseFont createFont(String name) throws DocumentException, IOException {
return BaseFont.createFont(name, "winansi", true);
}
private static void addCourier(HashMap result) throws DocumentException, IOException {
FontFamily courier = new FontFamily();
courier.setName("Courier");
courier.addFontDescription(new FontDescription(
createFont(BaseFont.COURIER_BOLDOBLIQUE), IdentValue.OBLIQUE, 700));
courier.addFontDescription(new FontDescription(
createFont(BaseFont.COURIER_OBLIQUE), IdentValue.OBLIQUE, 400));
courier.addFontDescription(new FontDescription(
createFont(BaseFont.COURIER_BOLD), IdentValue.NORMAL, 700));
courier.addFontDescription(new FontDescription(
createFont(BaseFont.COURIER), IdentValue.NORMAL, 400));
result.put("DialogInput", courier);
result.put("Monospaced", courier);
result.put("Courier", courier);
}
private static void addTimes(HashMap result) throws DocumentException, IOException {
FontFamily times = new FontFamily();
times.setName("Times");
times.addFontDescription(new FontDescription(
createFont(BaseFont.TIMES_BOLDITALIC), IdentValue.ITALIC, 700));
times.addFontDescription(new FontDescription(
createFont(BaseFont.TIMES_ITALIC), IdentValue.ITALIC, 400));
times.addFontDescription(new FontDescription(
createFont(BaseFont.TIMES_BOLD), IdentValue.NORMAL, 700));
times.addFontDescription(new FontDescription(
createFont(BaseFont.TIMES_ROMAN), IdentValue.NORMAL, 400));
result.put("Serif", times);
result.put("TimesRoman", times);
}
private static void addHelvetica(HashMap result) throws DocumentException, IOException {
FontFamily helvetica = new FontFamily();
helvetica.setName("Helvetica");
helvetica.addFontDescription(new FontDescription(
createFont(BaseFont.HELVETICA_BOLDOBLIQUE), IdentValue.OBLIQUE, 700));
helvetica.addFontDescription(new FontDescription(
createFont(BaseFont.HELVETICA_OBLIQUE), IdentValue.OBLIQUE, 400));
helvetica.addFontDescription(new FontDescription(
createFont(BaseFont.HELVETICA_BOLD), IdentValue.NORMAL, 700));
helvetica.addFontDescription(new FontDescription(
createFont(BaseFont.HELVETICA), IdentValue.NORMAL, 400));
result.put("Dialog", helvetica);
result.put("SansSerif", helvetica);
}
private static class FontFamily {
private String _name;
private List _fontDescriptions;
public FontFamily() {
}
public List getFontDescriptions() {
return _fontDescriptions;
}
public void addFontDescription(FontDescription descr) {
if (_fontDescriptions == null) {
_fontDescriptions = new ArrayList();
}
_fontDescriptions.add(descr);
Collections.sort(_fontDescriptions,
new Comparator() {
public int compare(Object o1, Object o2) {
FontDescription f1 = (FontDescription)o1;
FontDescription f2 = (FontDescription)o2;
return f1.getWeight() - f2.getWeight();
}
});
}
public String getName() {
return _name;
}
public void setName(String name) {
_name = name;
}
public FontDescription match(int desiredWeight, IdentValue style) {
if (_fontDescriptions == null) {
throw new RuntimeException("fontDescriptions is null");
}
List candidates = new ArrayList();
for (Iterator i = _fontDescriptions.iterator(); i.hasNext(); ) {
FontDescription description = (FontDescription)i.next();
if (description.getStyle() == style) {
candidates.add(description);
}
}
if (candidates.size() == 0) {
if (style == IdentValue.ITALIC) {
return match(desiredWeight, IdentValue.OBLIQUE);
} else if (style == IdentValue.OBLIQUE) {
return match(desiredWeight, IdentValue.NORMAL);
} else {
return null;
}
}
FontDescription[] matches = (FontDescription[])
candidates.toArray(new FontDescription[candidates.size()]);
FontDescription result;
result = findByWeight(matches, desiredWeight, SM_EXACT);
if (result != null) {
return result;
} else {
if (desiredWeight <= 500) {
return findByWeight(matches, desiredWeight, SM_LIGHTER_OR_DARKER);
} else {
return findByWeight(matches, desiredWeight, SM_DARKER_OR_LIGHTER);
}
}
}
private static final int SM_EXACT = 1;
private static final int SM_LIGHTER_OR_DARKER = 2;
private static final int SM_DARKER_OR_LIGHTER = 3;
private FontDescription findByWeight(FontDescription[] matches,
int desiredWeight, int searchMode) {
if (searchMode == SM_EXACT) {
for (int i = 0; i < matches.length; i++) {
FontDescription descr = matches[i];
if (descr.getWeight() == desiredWeight) {
return descr;
}
}
return null;
} else if (searchMode == SM_LIGHTER_OR_DARKER){
int offset = 0;
FontDescription descr = null;
for (offset = 0; offset < matches.length; offset++) {
descr = matches[offset];
if (descr.getWeight() > desiredWeight) {
break;
}
}
if (offset > 0 && descr.getWeight() > desiredWeight) {
return matches[offset-1];
} else {
return descr;
}
} else if (searchMode == SM_DARKER_OR_LIGHTER) {
int offset = 0;
FontDescription descr = null;
for (offset = matches.length - 1; offset >= 0; offset--) {
descr = matches[offset];
if (descr.getWeight() < desiredWeight) {
break;
}
}
if (offset != matches.length - 1 && descr.getWeight() < desiredWeight) {
return matches[offset+1];
} else {
return descr;
}
}
return null;
}
}
public static class FontDescription {
private IdentValue _style;
private int _weight;
private BaseFont _font;
private float _underlinePosition;
private float _underlineThickness;
private float _yStrikeoutSize;
private float _yStrikeoutPosition;
private boolean _isFromFontFace;
public FontDescription() {
}
public FontDescription(BaseFont font) {
this(font, IdentValue.NORMAL, 400);
}
public FontDescription(BaseFont font, IdentValue style, int weight) {
_font = font;
_style = style;
_weight = weight;
setMetricDefaults();
}
public BaseFont getFont() {
return _font;
}
public void setFont(BaseFont font) {
_font = font;
}
public int getWeight() {
return _weight;
}
public void setWeight(int weight) {
_weight = weight;
}
public IdentValue getStyle() {
return _style;
}
public void setStyle(IdentValue style) {
_style = style;
}
/**
* @see #getUnderlinePosition()
*/
public float getUnderlinePosition() {
return _underlinePosition;
}
/**
* This refers to the top of the underline stroke
*/
public void setUnderlinePosition(float underlinePosition) {
_underlinePosition = underlinePosition;
}
public float getUnderlineThickness() {
return _underlineThickness;
}
public void setUnderlineThickness(float underlineThickness) {
_underlineThickness = underlineThickness;
}
public float getYStrikeoutPosition() {
return _yStrikeoutPosition;
}
public void setYStrikeoutPosition(float strikeoutPosition) {
_yStrikeoutPosition = strikeoutPosition;
}
public float getYStrikeoutSize() {
return _yStrikeoutSize;
}
public void setYStrikeoutSize(float strikeoutSize) {
_yStrikeoutSize = strikeoutSize;
}
private void setMetricDefaults() {
_underlinePosition = -50;
_underlineThickness = 50;
int[] box = _font.getCharBBox('x');
if (box != null) {
_yStrikeoutPosition = box[3] / 2 + 50;
_yStrikeoutSize = 100;
} else {
// Do what the JDK does, size will be calculated by ITextTextRenderer
_yStrikeoutPosition = _font.getFontDescriptor(BaseFont.BBOXURY, 1000f) / 3.0f;
}
}
public boolean isFromFontFace() {
return _isFromFontFace;
}
public void setFromFontFace(boolean isFromFontFace) {
_isFromFontFace = isFromFontFace;
}
}
}
