package com.jclark.xsl.sax; import org.xml.sax.*; import java.io.Writer; import java.io.IOException; import java.util.Hashtable; /** * A DocumentHandler that writes an HTML representation. */ public class HTMLOutputHandler implements OutputDocumentHandler, CommentHandler, RawCharactersHandler { private Writer writer; private static final int DEFAULT_BUF_LENGTH = 4*1024; private char[] buf = new char[DEFAULT_BUF_LENGTH]; private int bufUsed = 0; private boolean inCdata = false; private boolean inPcdataChunk = true; private boolean inBlock = false; private final String lineSeparator = System.getProperty("line.separator"); private boolean indent = true; private char maxRepresentableChar = '\uFFFF'; private boolean keepOpen; private String encoding; private String doctypeSystem; private String doctypePublic; static private final int NORMAL_CONTENT = 0; static private final int EMPTY_CONTENT = 1; static private final int CDATA_CONTENT = 2; static private final int CONTENT_TYPE = 3; static private final int BLOCK_ELEMENT = 4; static private final int HEAD_ELEMENT = 8; static private final int PCDATA_ELEMENT = 16; public HTMLOutputHandler() { } public HTMLOutputHandler(Writer writer) { this.writer = writer; } public DocumentHandler init(Destination dest, AttributeList atts) throws IOException { String mediaType = atts.getValue("media-type"); if (mediaType == null) mediaType = "text/html"; encoding = atts.getValue("encoding"); if (encoding == null) { // not all Java implementations support ASCII writer = dest.getWriter(mediaType, "iso-8859-1"); // use character references for non-ASCII characters maxRepresentableChar = '\u007F'; } else { writer = dest.getWriter(mediaType, encoding); encoding = dest.getEncoding(); if (encoding.equalsIgnoreCase("iso-8859-1")) maxRepresentableChar = '\u00FF'; else if (encoding.equalsIgnoreCase("us-ascii")) maxRepresentableChar = '\u007F'; } doctypeSystem = atts.getValue("doctype-system"); doctypePublic = atts.getValue("doctype-public"); keepOpen = dest.keepOpen(); if ("no".equals(atts.getValue("indent"))) indent = false; return this; } public void setWriter(Writer writer) { this.writer = writer; } public void startDocument() throws SAXException { } public void characters(char[] ch, int off, int len) throws SAXException { if (len == 0) return; inPcdataChunk = true; if (inCdata) writeUnquoted(new String(ch, off, len)); else { for (; len > 0; len--, off++) { char c = ch[off]; switch (c) { case '\n': write(lineSeparator); break; case '&': write("&"); break; case '<': write("<"); break; case '>': write(">"); break; case '\u00A0': write(" "); break; default: if (c <= maxRepresentableChar) write(c); else write(getCharString(c)); break; } } } } public void ignorableWhitespace(char[] ch, int off, int len) throws SAXException { characters(ch, off, len); } public void rawCharacters(String chars) throws SAXException { if (chars.length() != 0) { writeUnquoted(chars); inPcdataChunk = true; } } private void writeUnquoted(String str) throws SAXException { int start = 0; for (;;) { int i = str.indexOf('\n', start); if (i < 0) break; if (i > start) write(str.substring(start, i)); write(lineSeparator); start = i + 1; } write(start == 0 ? str : str.substring(start)); } public void startElement(String name, AttributeList atts) throws SAXException { if (inCdata) // FIXME need to keep a count return; if (doctypeSystem != null || doctypePublic != null) { write("= 0 ? '\'' : '"'; write(lit); write(doctypePublic); write(lit); } else write(" SYSTEM"); if (doctypeSystem != null) { char lit = doctypeSystem.indexOf('"') >= 0 ? '\'' : '"'; write(' '); write(lit); write(doctypeSystem); write(lit); } write('>'); doctypeSystem = null; doctypePublic = null; write(lineSeparator); } int flags = getElementTypeFlags(name); int contentType = (flags & CONTENT_TYPE); boolean isBlockElement = (flags & BLOCK_ELEMENT) != 0; if (inPcdataChunk) inPcdataChunk = false; else if (indent && (!inBlock || isBlockElement)) write(lineSeparator); inBlock = !isBlockElement; write('<'); write(name); int nAtts = atts.getLength(); for (int i = 0; i < nAtts; i++) attribute(atts.getName(i), atts.getValue(i)); if (contentType == CDATA_CONTENT) inCdata = true; write('>'); if (encoding != null && (flags & HEAD_ELEMENT) != 0) { write(lineSeparator + ""); } } private void attribute(String name, String value) throws SAXException { write(' '); write(name); if (!isBooleanAttribute(name, value)) { write('='); write('"'); int len = value.length(); for (int i = 0; i < len; i++) { char c = value.charAt(i); switch (c) { case '\n': write(lineSeparator); break; case '&': // Handle JavaScript macros (see HTML 4.0 B.7.1) if (i + 1 < len && value.charAt(i + 1) == '{') write(c); else write("&"); break; case '"': write("""); break; case '\u00A0': write(" "); break; default: if (c <= maxRepresentableChar) write(c); else write(getCharString(c)); break; } } write('"'); } } public void endElement(String name) throws SAXException { int flags = getElementTypeFlags(name); int contentType = (flags & CONTENT_TYPE); boolean isBlockElement = (flags & BLOCK_ELEMENT) != 0; if (contentType != EMPTY_CONTENT) { if (inPcdataChunk) inPcdataChunk = false; else if (indent && (!inBlock || isBlockElement)) write(lineSeparator); inBlock = !isBlockElement; write('<'); write('/'); write(name); write('>'); } if ((flags & PCDATA_ELEMENT) != 0) inPcdataChunk = true; inCdata = false; } public void comment(String str) throws SAXException { write(""); } public void processingInstruction(String target, String data) throws SAXException { if (target == null) { comment(data); return; } write(" in str write(target); if (data.length() != 0) { write(' '); writeUnquoted(data); } write('>'); } static private final String emptyElements[] = { "area", "base", "basefont", "br", "col", "frame", "hr", "img", "input", "isindex", "link", "meta", "param" }; static private final String cdataElements[] = { "script", "style" }; static private final String blockElements[] = { "address", "area", "base", "blockquote", "body", "br", "caption", "center", "col", "colgroup", "dd", "dir", "div", "dl", "dt", "fieldset", "form", "frame", "frameset", "h1", "h2", "h3", "h4", "h5", "h6", "head", "hr", "html", "isindex", "li", "link", "map", "menu", "meta", "noframes", "noscript", "ol", "p", "pre", "style", "table", "tbody", "tfoot", "thead", "title", "tr", "ul" }; static private final String pcdataElements[] = { "applet", "img", "object" }; static private final String booleanAttributes[] = { "checked", "compact", "declare", "defer", "disabled", "ismap", "multiple", "nohref", "noresize", "noshade", "nowrap", "readonly", "selected" }; static private final String charEntities[] = { "\u00A0nbsp", "\u00A1iexcl", "\u00A2cent", "\u00A3pound", "\u00A4curren", "\u00A5yen", "\u00A6brvbar", "\u00A7sect", "\u00A8uml", "\u00A9copy", "\u00AAordf", "\u00ABlaquo", "\u00ACnot", "\u00ADshy", "\u00AEreg", "\u00AFmacr", "\u00B0deg", "\u00B1plusmn", "\u00B2sup2", "\u00B3sup3", "\u00B4acute", "\u00B5micro", "\u00B6para", "\u00B7middot", "\u00B8cedil", "\u00B9sup1", "\u00BAordm", "\u00BBraquo", "\u00BCfrac14", "\u00BDfrac12", "\u00BEfrac34", "\u00BFiquest", "\u00C0Agrave", "\u00C1Aacute", "\u00C2Acirc", "\u00C3Atilde", "\u00C4Auml", "\u00C5Aring", "\u00C6AElig", "\u00C7Ccedil", "\u00C8Egrave", "\u00C9Eacute", "\u00CAEcirc", "\u00CBEuml", "\u00CCIgrave", "\u00CDIacute", "\u00CEIcirc", "\u00CFIuml", "\u00D0ETH", "\u00D1Ntilde", "\u00D2Ograve", "\u00D3Oacute", "\u00D4Ocirc", "\u00D5Otilde", "\u00D6Ouml", "\u00D7times", "\u00D8Oslash", "\u00D9Ugrave", "\u00DAUacute", "\u00DBUcirc", "\u00DCUuml", "\u00DDYacute", "\u00DETHORN", "\u00DFszlig", "\u00E0agrave", "\u00E1aacute", "\u00E2acirc", "\u00E3atilde", "\u00E4auml", "\u00E5aring", "\u00E6aelig", "\u00E7ccedil", "\u00E8egrave", "\u00E9eacute", "\u00EAecirc", "\u00EBeuml", "\u00ECigrave", "\u00EDiacute", "\u00EEicirc", "\u00EFiuml", "\u00F0eth", "\u00F1ntilde", "\u00F2ograve", "\u00F3oacute", "\u00F4ocirc", "\u00F5otilde", "\u00F6ouml", "\u00F7divide", "\u00F8oslash", "\u00F9ugrave", "\u00FAuacute", "\u00FBucirc", "\u00FCuuml", "\u00FDyacute", "\u00FEthorn", "\u00FFyuml", "\u0152OElig", "\u0153oelig", "\u0160Scaron", "\u0161scaron", "\u0178Yuml", "\u0192fnof", "\u02C6circ", "\u02DCtilde", "\u0391Alpha", "\u0392Beta", "\u0393Gamma", "\u0394Delta", "\u0395Epsilon", "\u0396Zeta", "\u0397Eta", "\u0398Theta", "\u0399Iota", "\u039AKappa", "\u039BLambda", "\u039CMu", "\u039DNu", "\u039EXi", "\u039FOmicron", "\u03A0Pi", "\u03A1Rho", "\u03A3Sigma", "\u03A4Tau", "\u03A5Upsilon", "\u03A6Phi", "\u03A7Chi", "\u03A8Psi", "\u03A9Omega", "\u03B1alpha", "\u03B2beta", "\u03B3gamma", "\u03B4delta", "\u03B5epsilon", "\u03B6zeta", "\u03B7eta", "\u03B8theta", "\u03B9iota", "\u03BAkappa", "\u03BBlambda", "\u03BCmu", "\u03BDnu", "\u03BExi", "\u03BFomicron", "\u03C0pi", "\u03C1rho", "\u03C2sigmaf", "\u03C3sigma", "\u03C4tau", "\u03C5upsilon", "\u03C6phi", "\u03C7chi", "\u03C8psi", "\u03C9omega", "\u03D1thetasym", "\u03D2upsih", "\u03D6piv", "\u2002ensp", "\u2003emsp", "\u2009thinsp", "\u200Czwnj", "\u200Dzwj", "\u200Elrm", "\u200Frlm", "\u2013ndash", "\u2014mdash", "\u2018lsquo", "\u2019rsquo", "\u201Asbquo", "\u201Cldquo", "\u201Drdquo", "\u201Ebdquo", "\u2020dagger", "\u2021Dagger", "\u2022bull", "\u2026hellip", "\u2030permil", "\u2032prime", "\u2033Prime", "\u2039lsaquo", "\u203Arsaquo", "\u203Eoline", "\u2044frasl", "\u20ACeuro", "\u2111image", "\u2118weierp", "\u211Creal", "\u2122trade", "\u2135alefsym", "\u2190larr", "\u2191uarr", "\u2192rarr", "\u2193darr", "\u2194harr", "\u21B5crarr", "\u21D0lArr", "\u21D1uArr", "\u21D2rArr", "\u21D3dArr", "\u21D4hArr", "\u2200forall", "\u2202part", "\u2203exist", "\u2205empty", "\u2207nabla", "\u2208isin", "\u2209notin", "\u220Bni", "\u220Fprod", "\u2211sum", "\u2212minus", "\u2217lowast", "\u221Aradic", "\u221Dprop", "\u221Einfin", "\u2220ang", "\u2227and", "\u2228or", "\u2229cap", "\u222Acup", "\u222Bint", "\u2234there4", "\u223Csim", "\u2245cong", "\u2248asymp", "\u2260ne", "\u2261equiv", "\u2264le", "\u2265ge", "\u2282sub", "\u2283sup", "\u2284nsub", "\u2286sube", "\u2287supe", "\u2295oplus", "\u2297otimes", "\u22A5perp", "\u22C5sdot", "\u2308lceil", "\u2309rceil", "\u230Alfloor", "\u230Brfloor", "\u2329lang", "\u232Arang", "\u25CAloz", "\u2660spades", "\u2663clubs", "\u2665hearts", "\u2666diams" }; static private String[][] charMap = new String[256][]; static private Hashtable elementTypeTable = new Hashtable(); static private Hashtable booleanAttributesTable = new Hashtable(); static { for (int i = 0; i < charEntities.length; i++) { int c = charEntities[i].charAt(0); int lo = c & 0xff; int hi = c >> 8; if (charMap[hi] == null) charMap[hi] = new String[256]; charMap[hi][lo] = "&" + charEntities[i].substring(1) + ";"; } char[] charBuf = new char[1]; for (int i = 0; i < 128; i++) { if (charMap[0][i] == null) { charBuf[0] = (char)i; charMap[0][i] = new String(charBuf); } } Integer type = new Integer(BLOCK_ELEMENT); for (int i = 0; i < blockElements.length; i++) elementTypeTable.put(blockElements[i], type); Integer blockType = new Integer(EMPTY_CONTENT|BLOCK_ELEMENT); Integer inlineType = new Integer(EMPTY_CONTENT); for (int i = 0; i < emptyElements.length; i++) { if (elementTypeTable.get(emptyElements[i]) == null) type = inlineType; else type = blockType; elementTypeTable.put(emptyElements[i], type); } blockType = new Integer(CDATA_CONTENT|BLOCK_ELEMENT); inlineType = new Integer(CDATA_CONTENT); for (int i = 0; i < cdataElements.length; i++) { if (elementTypeTable.get(cdataElements[i]) == null) type = inlineType; else type = blockType; elementTypeTable.put(cdataElements[i], type); } for (int i = 0; i < pcdataElements.length; i++) { type = (Integer)elementTypeTable.get(pcdataElements[i]); if (type == null) type = new Integer(PCDATA_ELEMENT); else type = new Integer(PCDATA_ELEMENT|type.intValue()); elementTypeTable.put(pcdataElements[i], type); } for (int i = 0; i < booleanAttributes.length; i++) booleanAttributesTable.put(booleanAttributes[i], booleanAttributes[i]); elementTypeTable.put("head", new Integer(BLOCK_ELEMENT|HEAD_ELEMENT)); } private static String getCharString(char c) { String[] v = charMap[c >> 8]; if (v == null) { v = new String[256]; charMap[c >> 8] = v; } String name = v[c & 0xFF]; if (name == null) { name = "&#" + Integer.toString(c) + ";"; v[c & 0xFF] = name; } return name; } private static int getElementTypeFlags(String name) { Integer type = (Integer)elementTypeTable.get(name.toLowerCase()); if (type == null) return 0; return type.intValue(); } private static boolean isBooleanAttribute(String name, String value) { if (!name.equalsIgnoreCase(value)) return false; return booleanAttributesTable.get(name.toLowerCase()) != null; } private final void write(String s) throws SAXException { int start = 0; int len = s.length(); int avail = buf.length - bufUsed; while (avail < len) { s.getChars(start, start + avail, buf, bufUsed); bufUsed = buf.length; flushBuf(); start += avail; len -= avail; avail = buf.length; } s.getChars(start, start + len, buf, bufUsed); bufUsed += len; } private final void write(char b) throws SAXException { if (bufUsed == buf.length) flushBuf(); buf[bufUsed++] = b; } private final void flushBuf() throws SAXException { try { writer.write(buf, 0, bufUsed); } catch (IOException e) { throw new SAXException(e); } bufUsed = 0; } public void endDocument() throws SAXException { write(lineSeparator); if (bufUsed != 0) flushBuf(); try { if (keepOpen) writer.flush(); else writer.close(); } catch (IOException e) { throw new SAXException(e); } writer = null; buf = null; } public void setDocumentLocator(org.xml.sax.Locator loc) { } }