com.caucho.xml.HtmlPolicy Maven / Gradle / Ivy
/*
* Copyright (c) 1998-2018 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.xml;
import com.caucho.util.CharBuffer;
import com.caucho.util.CharCursor;
import com.caucho.util.CharScanner;
import com.caucho.util.IntMap;
import com.caucho.util.StringCharCursor;
import org.w3c.dom.Element;
import java.io.IOException;
import java.util.Locale;
/**
* Policy for parsing an HTML file.
*/
class HtmlPolicy extends Policy {
static final int DOCUMENT = 1;
static final int COMMENT = DOCUMENT + 1;
static final int TEXT = COMMENT + 1;
static final int JSP = TEXT + 1;
static final int WHITESPACE = JSP + 1;
static final int HTML = WHITESPACE + 1;
static final int HEAD = HTML + 1;
static final int TITLE = HEAD + 1;
static final int ISINDEX = TITLE + 1;
static final int BASE = ISINDEX + 1;
static final int SCRIPT = BASE + 1;
static final int STYLE = SCRIPT + 1;
static final int META = STYLE + 1;
static final int LINK = META + 1;
static final int OBJECT = LINK + 1;
static final int BODY = OBJECT + 1;
static final int BASEFONT = BODY + 1;
static final int BR = BASEFONT + 1;
static final int AREA = BR + 1;
static final int IMG = AREA + 1;
static final int PARAM = IMG + 1;
static final int HR = PARAM + 1;
static final int INPUT = HR + 1;
static final int P = INPUT + 1;
static final int DT = P + 1;
static final int DD = DT + 1;
static final int LI = DD + 1;
static final int OPTION = LI + 1;
static final int TABLE = OPTION + 1;
static final int CAPTION = TABLE + 1;
static final int THEAD = CAPTION + 1;
static final int TFOOT = THEAD + 1;
static final int COL = TFOOT + 1;
static final int COLGROUP = COL + 1;
static final int TBODY = COLGROUP + 1;
static final int TR = TBODY + 1;
static final int TD = TR + 1;
static final int TH = TD + 1;
static final int FRAME = TH + 1;
static final int FRAMESET = FRAME + 1;
static final int BLOCK = FRAMESET + 1;
static final int INLINE = BLOCK + 1;
static IntMap names;
static IntMap cbNames;
static QName htmlName = new QName(null, "html", null);
static QName headName = new QName(null, "head", null);
static QName bodyName = new QName(null, "body", null);
boolean toLower = true;
boolean isJsp = false;
boolean autoHtml = false;
boolean hasBody = false;
boolean autoHead = false;
CharBuffer cb = new CharBuffer();
public void init()
{
toLower = true;
isJsp = false;
autoHtml = false;
hasBody = false;
autoHead = false;
}
/**
* When true, HTML parsing normalizes HTML tags to lower case.
*/
public void setToLower(boolean toLower)
{
this.toLower = toLower;
}
/**
* When true, treat text before HTML specially.
*/
public void setJsp(boolean isJsp)
{
this.isJsp = isJsp;
}
/**
* Return the normalized name.
*
* @param tag the raw name in the XML file.
*
* @return the normalized name.
*/
QName getName(CharBuffer tag)
{
if (! toLower)
return super.getName(tag);
cb.clear();
cb.append(tag);
cb.toLowerCase();
int name = cbNames.get(cb);
if (name >= 0)
return super.getName(cb);
else
return super.getName(tag);
}
QName getAttributeName(CharBuffer eltName, CharBuffer source)
{
if (! toLower)
return super.getName(source);
cb.clear();
cb.append(eltName);
cb.toLowerCase();
int name = cbNames.get(cb);
if (name < 0)
return super.getName(source);
else {
source.toLowerCase();
return super.getName(source);
}
}
/**
* Returns the appropriate action when opening a HTML tag.
*
* @param parser the XML parser
* @param node the parent node
* @param next the next child
* @return the action code
*/
int openAction(XmlParser parser, QName node, QName next)
throws XmlParseException
{
String nodeName = node == null ? "#document" : node.getName();
String nextName = next.getName();
int nextCode = names.get(nextName);
switch (names.get(nodeName)) {
case DOCUMENT:
switch (nextCode) {
case HTML:
return PUSH;
case COMMENT:
return PUSH;
case HEAD: case TITLE: case ISINDEX: case BASE: case SCRIPT:
case STYLE: case META: case LINK: case OBJECT:
opt = htmlName;
return PUSH_OPT;
case WHITESPACE:
return IGNORE;
case JSP:
return PUSH;
default:
if (autoHtml)
return PUSH;
autoHtml = true;
opt = htmlName;
return PUSH_OPT;
}
case HTML:
switch (nextCode) {
case HTML:
return ERROR;
case HEAD:
case COMMENT:
case FRAMESET:
return PUSH;
case BODY:
hasBody = true;
return PUSH;
case TITLE: case ISINDEX: case BASE: case SCRIPT:
case STYLE: case META: case LINK: case OBJECT:
opt = headName;
autoHead = true;
return PUSH_OPT;
case WHITESPACE:
return PUSH;
case JSP:
return PUSH;
default:
if (hasBody)
return PUSH;
hasBody = true;
opt = bodyName;
return PUSH_OPT;
}
case HEAD:
switch (nextCode) {
case META:
// checkMetaEncoding((Element) next);
return PUSH_EMPTY;
case LINK: case ISINDEX: case BASE:
return PUSH_EMPTY;
case SCRIPT: case STYLE:
return PUSH_VERBATIM;
case TITLE:
case OBJECT:
return PUSH;
case WHITESPACE:
return PUSH;
case JSP:
case TEXT:
if (autoHead)
return POP;
else
return PUSH;
default:
return POP;
}
case LI:
switch (nextCode) {
case LI:
return POP;
case BASEFONT: case BR: case AREA: case LINK: case IMG: case PARAM:
case HR: case INPUT: case COL: case FRAME: case ISINDEX:
case BASE: case META:
return PUSH_EMPTY;
case SCRIPT: case STYLE:
return PUSH_VERBATIM;
default:
return PUSH;
}
case OPTION:
switch (nextCode) {
case WHITESPACE:
case TEXT:
return PUSH;
default:
return POP;
}
case DD:
switch (nextCode) {
case DD: case DT:
return POP;
case BASEFONT: case BR: case AREA: case LINK: case IMG: case PARAM:
case HR: case INPUT: case COL: case FRAME: case ISINDEX:
case BASE: case META:
return PUSH_EMPTY;
case SCRIPT: case STYLE:
return PUSH_VERBATIM;
default:
return PUSH;
}
case THEAD: case TFOOT: case COLGROUP:
switch (nextCode) {
case THEAD: case TFOOT: case TBODY: case COLGROUP: case COL:
return POP;
case BASEFONT: case BR: case AREA: case LINK: case IMG: case PARAM:
case HR: case INPUT: case FRAME: case ISINDEX:
case BASE: case META:
return PUSH_EMPTY;
case SCRIPT: case STYLE:
return PUSH_VERBATIM;
default:
return PUSH;
}
case TR:
switch (nextCode) {
case THEAD: case TFOOT: case TBODY: case COLGROUP: case COL: case TR:
return POP;
case BASEFONT: case BR: case AREA: case LINK: case IMG: case PARAM:
case HR: case INPUT: case FRAME: case ISINDEX:
case BASE: case META:
return PUSH_EMPTY;
case TD: case TH:
return PUSH;
case SCRIPT: case STYLE:
return PUSH_VERBATIM;
default:
return PUSH;
}
case TD: case TH:
switch (nextCode) {
case THEAD: case TFOOT: case TBODY: case COLGROUP: case COL: case TR:
case TD: case TH:
return POP;
case BASEFONT: case BR: case AREA: case LINK: case IMG: case PARAM:
case HR: case INPUT: case FRAME: case ISINDEX:
case BASE: case META:
return PUSH_EMPTY;
case SCRIPT: case STYLE:
return PUSH_VERBATIM;
default:
return PUSH;
}
case P: case DT:
switch (nextCode) {
case BLOCK: case P: case TABLE: case CAPTION: case THEAD:
case TFOOT: case COLGROUP: case TBODY: case TR: case TD:
case TH: case DT: case LI:
return POP;
case BASEFONT: case BR: case AREA: case LINK: case IMG: case PARAM:
case HR: case INPUT: case COL: case FRAME: case ISINDEX:
case BASE: case META:
return PUSH_EMPTY;
case SCRIPT: case STYLE:
return PUSH_VERBATIM;
default:
return PUSH;
}
case TABLE:
switch (nextCode) {
case CAPTION: case THEAD: case TFOOT: case COL: case COLGROUP:
case TBODY: case TR:
return PUSH;
case SCRIPT: case STYLE:
return PUSH_VERBATIM;
default:
/*
opt = "tr";
return PUSH_OPT;
*/
return PUSH;
}
default:
switch (nextCode) {
case BASEFONT: case BR: case AREA: case LINK: case IMG: case PARAM:
case HR: case INPUT: case COL: case FRAME: case ISINDEX:
case BASE: case META:
return PUSH_EMPTY;
case SCRIPT: case STYLE:
return PUSH_VERBATIM;
default:
return PUSH;
}
}
}
private static CharScanner charsetScanner = new CharScanner(" \t=;");
private void checkMetaEncoding(Element elt)
{
String http = elt.getAttribute("http-equiv");
String content = elt.getAttribute("content");
if (http.equals("") || content.equals("") ||
! http.equalsIgnoreCase("content-type"))
return;
CharCursor cursor = new StringCharCursor(content);
charsetScanner.scan(cursor);
charsetScanner.skip(cursor);
CharBuffer buf = CharBuffer.allocate();
while (cursor.current() != cursor.DONE) {
buf.clear();
charsetScanner.scan(cursor, buf);
if (buf.toString().equalsIgnoreCase("charset")) {
charsetScanner.skip(cursor);
buf.clear();
charsetScanner.scan(cursor, buf);
if (buf.length() > 0) {
try {
is.setEncoding(buf.close());
} catch (IOException e) {
}
return;
}
}
}
}
int elementCloseAction(XmlParser parser, QName node, String tagEnd)
throws XmlParseException
{
String nodeName = node.getName();
if (nodeName.equals(tagEnd))
return POP;
if (nodeName == "#document" && tagEnd.equals("")) {
/*
Document doc = (Document) node;
// If JSP, move any text into the body element
if (isJsp && doc.getDocumentElement() == null &&
node.getFirstChild() instanceof Text) {
Element html = doc.createElement("html");
doc.appendChild(html);
Element body = doc.createElement("body");
html.appendChild(body);
Node child;
while ((child = doc.getFirstChild()) instanceof Text ||
child instanceof Comment) {
body.appendChild(child);
}
}
*/
return POP;
}
switch (names.get(tagEnd)) {
case BASEFONT: case BR: case AREA: case LINK: case IMG: case PARAM:
case HR: case INPUT: case COL: case FRAME: case ISINDEX:
case BASE: case META:
String errorTagEnd;
if (tagEnd.equals(""))
errorTagEnd = L.l("end of file");
else
errorTagEnd = "`<" + tagEnd + ">'";
throw parser.error(L.l("{0} expects to be empty",
errorTagEnd));
}
switch (names.get(nodeName)) {
case BODY: case P:
case DT: case DD: case LI: case OPTION:
case THEAD: case TFOOT: case TBODY: case COLGROUP:
case TR: case TH: case TD:
return POP_AND_LOOP;
case HTML:
case HEAD:
// If JSP and missing a body, move any text into the body element
/*
if (isJsp && node.getLastChild() instanceof Text) {
Node child;
for (child = node.getLastChild();
child != null;
child = child.getPreviousSibling()) {
if (child.getNodeName().equals("body"))
return POP_AND_LOOP;
}
Document doc = node.getOwnerDocument();
Element body = doc.createElement("body");
while ((child = node.getLastChild()) instanceof Text ||
child instanceof Comment) {
body.insertBefore(child, body.getFirstChild());
}
doc.getDocumentElement().appendChild(body);
}
*/
return POP_AND_LOOP;
default:
if (forgiving) {
/*
Node parent = node;
for (; parent != null; parent = parent.getParentNode()) {
if (parent.getNodeName().equals(tagEnd))
return POP_AND_LOOP;
}
return IGNORE;
*/
return POP_AND_LOOP;
}
String errorTagEnd;
if (tagEnd.equals(""))
errorTagEnd = L.l("end of file");
else
errorTagEnd = "`'";
String expect;
if (nodeName.equals("#document")) {
throw parser.error(L.l("expected {0} at {1}",
L.l("end of document"), errorTagEnd));
}
else
expect = "`'";
throw parser.error(L.l("expected {0} at {1} (open at {2})",
expect, errorTagEnd,
"" + parser.getNodeLine()));
}
}
private static void addName(String name, int code)
{
names.put(name, code);
cbNames.put(new CharBuffer(name), code);
String upper = name.toUpperCase(Locale.ENGLISH);
names.put(upper, code);
cbNames.put(new CharBuffer(upper), code);
}
static {
names = new IntMap();
cbNames = new IntMap();
addName("#document", DOCUMENT);
addName("#comment", COMMENT);
addName("#text", TEXT);
addName("#jsp", JSP);
addName("#whitespace", WHITESPACE);
addName("html", HTML);
addName("head", HEAD);
addName("title", TITLE);
addName("isindex", ISINDEX);
addName("base", BASE);
addName("script", SCRIPT);
addName("style", STYLE);
addName("meta", META);
addName("link", LINK);
addName("object", OBJECT);
addName("body", BODY);
addName("basefont", BASEFONT);
addName("br", BR);
addName("area", AREA);
addName("link", LINK);
addName("img", IMG);
addName("param", PARAM);
addName("hr", HR);
addName("input", INPUT);
addName("frame", FRAME);
addName("p", P);
addName("dt", DT);
addName("dd", DD);
addName("li", LI);
addName("option", OPTION);
addName("table", TABLE);
addName("caption", CAPTION);
addName("thead", THEAD);
addName("tfoot", TFOOT);
addName("col", COL);
addName("colgroup", COLGROUP);
addName("tbody", TBODY);
addName("tr", TR);
addName("th", TH);
addName("td", TD);
addName("h1", BLOCK);
addName("h2", BLOCK);
addName("h3", BLOCK);
addName("h4", BLOCK);
addName("h5", BLOCK);
addName("h6", BLOCK);
addName("ul", BLOCK);
addName("ol", BLOCK);
addName("dir", BLOCK);
addName("menu", BLOCK);
addName("pre", BLOCK);
addName("dl", BLOCK);
addName("div", BLOCK);
addName("center", BLOCK);
addName("noscript", BLOCK);
addName("noframes", BLOCK);
addName("blockquote", BLOCK);
addName("form", BLOCK);
addName("fieldset", BLOCK);
addName("address", BLOCK);
addName("tt", INLINE);
addName("i", INLINE);
addName("b", INLINE);
addName("u", INLINE);
addName("s", INLINE);
addName("strike", INLINE);
addName("big", INLINE);
addName("small", INLINE);
addName("em", INLINE);
addName("strong", INLINE);
addName("dfn", INLINE);
addName("code", INLINE);
addName("samp", INLINE);
addName("kbd", INLINE);
addName("var", INLINE);
addName("cite", INLINE);
addName("abbr", INLINE);
addName("acronym", INLINE);
addName("font", INLINE);
addName("iframe", INLINE);
addName("applet", INLINE);
addName("ins", INLINE);
addName("del", INLINE);
addName("a", INLINE);
addName("map", INLINE);
addName("q", INLINE);
addName("sub", INLINE);
addName("sup", INLINE);
addName("span", INLINE);
addName("bdo", INLINE);
addName("select", INLINE);
addName("textarea", INLINE);
addName("label", INLINE);
addName("optgroup", INLINE);
addName("button", INLINE);
addName("legend", INLINE);
addName("frameset", FRAMESET);
// CDATA -- STYLE, SCRIPT
}
}
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