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Open HTML to PDF is a CSS 2.1 renderer written in Java. This artifact contains the core rendering and layout code.
/*
* {{{ header & license
* Copyright (c) 2004, 2005 Joshua Marinacci
*
* 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 com.openhtmltopdf.layout;
import java.text.BreakIterator;
import java.util.Locale;
import com.openhtmltopdf.css.constants.CSSName;
import com.openhtmltopdf.css.constants.IdentValue;
import com.openhtmltopdf.css.style.CalculatedStyle;
import com.openhtmltopdf.extend.FSTextBreaker;
import com.openhtmltopdf.extend.FSTextTransformer;
import com.openhtmltopdf.util.ThreadCtx;
public class TextUtil {
public static class DefaultCharacterBreaker implements FSTextBreaker {
private final BreakIterator iter;
public DefaultCharacterBreaker(BreakIterator iter) {
this.iter = iter;
}
@Override
public int next() {
return iter.next();
}
@Override
public void setText(String newText) {
iter.setText(newText);
}
}
public static class DefaultToUpperTransformer implements FSTextTransformer {
private final Locale lc;
public DefaultToUpperTransformer(Locale lc) {
this.lc = lc;
}
@Override
public String transform(String in) {
return in.toUpperCase(lc);
}
}
public static class DefaultToLowerTransformer implements FSTextTransformer {
private final Locale lc;
public DefaultToLowerTransformer(Locale lc) {
this.lc = lc;
}
@Override
public String transform(String in) {
return in.toLowerCase(lc);
}
}
/**
* A best effort implementation of title casing. Use the implementation in the rtl-support
* module for better results.
*/
public static class DefaultToTitleTransformer implements FSTextTransformer {
public DefaultToTitleTransformer() { }
@Override
public String transform(String in) {
StringBuilder out = new StringBuilder(in.length());
boolean makeTitle = true;
for (int i = 0; i < in.length(); ) {
int cp = in.codePointAt(i);
if (Character.isLetter(cp) && makeTitle) {
out.appendCodePoint(Character.toTitleCase(cp));
makeTitle = false;
} else if (Character.isWhitespace(cp) || Character.isSpaceChar(cp)) {
out.appendCodePoint(cp);
makeTitle = true;
} else {
out.appendCodePoint(cp);
}
i += Character.charCount(cp);
}
return out.toString();
}
}
public static String transformText( String text, CalculatedStyle style ) {
IdentValue transform = style.getIdent( CSSName.TEXT_TRANSFORM );
IdentValue fontVariant = style.getIdent( CSSName.FONT_VARIANT );
SharedContext ctx = ThreadCtx.get().sharedContext();
if ( transform == IdentValue.LOWERCASE ) {
text = ctx.getUnicodeToLowerTransformer().transform(text);
}
if ( transform == IdentValue.UPPERCASE ||
fontVariant == IdentValue.SMALL_CAPS ) {
text = ctx.getUnicodeToUpperTransformer().transform(text);
}
if ( transform == IdentValue.CAPITALIZE ) {
text = ctx.getUnicodeToTitleTransformer().transform(text);
}
return text;
}
public static String transformFirstLetterText( String text, CalculatedStyle style ) {
return transformText(text, style);
}
/**
* According to the CSS spec the first letter includes certain punctuation immediately
* preceding or following the actual first letter.
*/
public static boolean isFirstLetterSeparatorChar( int currentChar ) {
switch (Character.getType(currentChar)) {
case Character.START_PUNCTUATION:
case Character.END_PUNCTUATION:
case Character.INITIAL_QUOTE_PUNCTUATION:
case Character.FINAL_QUOTE_PUNCTUATION:
case Character.OTHER_PUNCTUATION:
case Character.SPACE_SEPARATOR:
return true;
default:
return false;
}
}
}
/*
* $Id$
*
* $Log$
* Revision 1.11 2007/02/07 16:33:33 peterbrant
* Initial commit of rewritten table support and associated refactorings
*
* Revision 1.10 2005/01/29 20:18:41 pdoubleya
* Clean/reformat code. Removed commented blocks, checked copyright.
*
* Revision 1.9 2005/01/24 22:46:43 pdoubleya
* Added support for ident-checks using IdentValue instead of string comparisons.
*
* Revision 1.8 2004/12/12 03:32:59 tobega
* Renamed x and u to avoid confusing IDE. But that got cvs in a twist. See if this does it
*
* Revision 1.7 2004/12/06 02:55:43 tobega
* More cleaning of use of Node, more preparation for Content-based inline generation.
*
* Revision 1.6 2004/12/05 00:48:58 tobega
* Cleaned up so that now all property-lookups use the CalculatedStyle. Also added support for relative values of top, left, width, etc.
*
* Revision 1.5 2004/11/22 21:34:03 joshy
* created new whitespace handler.
* new whitespace routines only work if you set a special property. it's
* off by default.
*
* turned off fractional font metrics
*
* fixed some bugs in Uu and Xx
*
* - j
*
* Issue number:
* Obtained from:
* Submitted by:
* Reviewed by:
*
* Revision 1.4 2004/11/08 21:18:21 joshy
* preliminary small-caps implementation
*
* Issue number:
* Obtained from:
* Submitted by:
* Reviewed by:
*
* Revision 1.3 2004/10/23 13:46:48 pdoubleya
* Re-formatted using JavaStyle tool.
* Cleaned imports to resolve wildcards except for common packages (java.io, java.util, etc).
* Added CVS log comments at bottom.
*
*
*/