| author | rupashka |
| Mon, 21 Jun 2010 16:47:05 +0400 | |
| changeset 6862 | f66eb6b6a6b9 |
| parent 5506 | 202f599c92aa |
| child 7014 | eb4fcf73ee99 |
| permissions | -rw-r--r-- |
| 2 | 1 |
/* |
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* Copyright (c) 1998, 2008, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package javax.swing.text.html.parser; |
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import javax.swing.text.SimpleAttributeSet; |
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import javax.swing.text.html.HTML; |
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import javax.swing.text.ChangedCharSetException; |
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import java.io.*; |
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import java.util.Hashtable; |
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import java.util.Properties; |
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import java.util.Vector; |
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import java.util.Enumeration; |
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import java.net.URL; |
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import sun.misc.MessageUtils; |
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/** |
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* A simple DTD-driven HTML parser. The parser reads an |
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* HTML file from an InputStream and calls various methods |
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* (which should be overridden in a subclass) when tags and |
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* data are encountered. |
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* <p> |
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* Unfortunately there are many badly implemented HTML parsers |
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* out there, and as a result there are many badly formatted |
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* HTML files. This parser attempts to parse most HTML files. |
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* This means that the implementation sometimes deviates from |
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* the SGML specification in favor of HTML. |
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* <p> |
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* The parser treats \r and \r\n as \n. Newlines after starttags |
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* and before end tags are ignored just as specified in the SGML/HTML |
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* specification. |
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* <p> |
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* The html spec does not specify how spaces are to be coalesced very well. |
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* Specifically, the following scenarios are not discussed (note that a |
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* space should be used here, but I am using &nbsp to force the space to |
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* be displayed): |
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* <p> |
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* '<b>blah <i> <strike> foo' which can be treated as: |
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* '<b>blah <i><strike>foo' |
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* <p>as well as: |
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* '<p><a href="xx"> <em>Using</em></a></p>' |
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* which appears to be treated as: |
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* '<p><a href="xx"><em>Using</em></a></p>' |
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* <p> |
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* If <code>strict</code> is false, when a tag that breaks flow, |
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* (<code>TagElement.breaksFlows</code>) or trailing whitespace is |
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* encountered, all whitespace will be ignored until a non whitespace |
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* character is encountered. This appears to give behavior closer to |
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* the popular browsers. |
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* |
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* @see DTD |
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* @see TagElement |
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* @see SimpleAttributeSet |
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* @author Arthur van Hoff |
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* @author Sunita Mani |
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*/ |
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public |
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class Parser implements DTDConstants {
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private char text[] = new char[1024]; |
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private int textpos = 0; |
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private TagElement last; |
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private boolean space; |
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private char str[] = new char[128]; |
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private int strpos = 0; |
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protected DTD dtd = null; |
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private int ch; |
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private int ln; |
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private Reader in; |
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private Element recent; |
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private TagStack stack; |
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private boolean skipTag = false; |
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private TagElement lastFormSent = null; |
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private SimpleAttributeSet attributes = new SimpleAttributeSet(); |
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// State for <html>, <head> and <body>. Since people like to slap |
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// together HTML documents without thinking, occasionally they |
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// have multiple instances of these tags. These booleans track |
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// the first sightings of these tags so they can be safely ignored |
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// by the parser if repeated. |
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private boolean seenHtml = false; |
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private boolean seenHead = false; |
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private boolean seenBody = false; |
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/** |
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* The html spec does not specify how spaces are coalesced very well. |
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* If strict == false, ignoreSpace is used to try and mimic the behavior |
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* of the popular browsers. |
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* <p> |
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* The problematic scenarios are: |
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* '<b>blah <i> <strike> foo' which can be treated as: |
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* '<b>blah <i><strike>foo' |
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* as well as: |
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* '<p><a href="xx"> <em>Using</em></a></p>' |
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* which appears to be treated as: |
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* '<p><a href="xx"><em>Using</em></a></p>' |
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* <p> |
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* When a tag that breaks flow, or trailing whitespace is encountered |
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* ignoreSpace is set to true. From then on, all whitespace will be |
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* ignored. |
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* ignoreSpace will be set back to false the first time a |
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* non whitespace character is encountered. This appears to give |
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* behavior closer to the popular browsers. |
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*/ |
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private boolean ignoreSpace; |
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/** |
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* This flag determines whether or not the Parser will be strict |
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* in enforcing SGML compatibility. If false, it will be lenient |
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* with certain common classes of erroneous HTML constructs. |
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* Strict or not, in either case an error will be recorded. |
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* |
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*/ |
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protected boolean strict = false; |
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/** Number of \r\n's encountered. */ |
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private int crlfCount; |
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/** Number of \r's encountered. A \r\n will not increment this. */ |
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private int crCount; |
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/** Number of \n's encountered. A \r\n will not increment this. */ |
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private int lfCount; |
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// |
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// To correctly identify the start of a tag/comment/text we need two |
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// ivars. Two are needed as handleText isn't invoked until the tag |
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// after the text has been parsed, that is the parser parses the text, |
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// then a tag, then invokes handleText followed by handleStart. |
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// |
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/** The start position of the current block. Block is overloaded here, |
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* it really means the current start position for the current comment, |
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* tag, text. Use getBlockStartPosition to access this. */ |
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private int currentBlockStartPos; |
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/** Start position of the last block. */ |
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private int lastBlockStartPos; |
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/** |
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* array for mapping numeric references in range |
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* 130-159 to displayable Unicode characters. |
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*/ |
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private static final char[] cp1252Map = {
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8218, // ‚ |
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402, // ƒ |
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8222, // „ |
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8230, // … |
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8224, // † |
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8225, // ‡ |
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710, // ˆ |
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8240, // ‰ |
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352, // Š |
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8249, // ‹ |
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338, // Π|
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141, //  |
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142, // Ž |
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143, //  |
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144, //  |
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8216, // ‘ |
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8217, // ’ |
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8220, // “ |
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8221, // ” |
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8226, // • |
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8211, // – |
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8212, // — |
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732, // ˜ |
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8482, // ™ |
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353, // š |
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8250, // › |
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339, // œ |
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157, //  |
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158, // ž |
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376 // Ÿ |
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}; |
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public Parser(DTD dtd) {
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this.dtd = dtd; |
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} |
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/** |
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* @return the line number of the line currently being parsed |
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*/ |
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protected int getCurrentLine() {
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return ln; |
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} |
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/** |
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* Returns the start position of the current block. Block is |
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* overloaded here, it really means the current start position for |
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* the current comment tag, text, block.... This is provided for |
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* subclassers that wish to know the start of the current block when |
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* called with one of the handleXXX methods. |
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*/ |
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int getBlockStartPosition() {
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return Math.max(0, lastBlockStartPos - 1); |
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} |
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/** |
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* Makes a TagElement. |
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*/ |
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protected TagElement makeTag(Element elem, boolean fictional) {
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return new TagElement(elem, fictional); |
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} |
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protected TagElement makeTag(Element elem) {
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return makeTag(elem, false); |
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} |
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protected SimpleAttributeSet getAttributes() {
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return attributes; |
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} |
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protected void flushAttributes() {
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attributes.removeAttributes(attributes); |
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} |
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/** |
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* Called when PCDATA is encountered. |
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*/ |
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protected void handleText(char text[]) {
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} |
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/** |
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* Called when an HTML title tag is encountered. |
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*/ |
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protected void handleTitle(char text[]) {
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// default behavior is to call handleText. Subclasses |
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// can override if necessary. |
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handleText(text); |
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} |
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/** |
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* Called when an HTML comment is encountered. |
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*/ |
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protected void handleComment(char text[]) {
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} |
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protected void handleEOFInComment() {
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// We've reached EOF. Our recovery strategy is to |
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// see if we have more than one line in the comment; |
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// if so, we pretend that the comment was an unterminated |
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// single line comment, and reparse the lines after the |
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// first line as normal HTML content. |
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int commentEndPos = strIndexOf('\n');
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if (commentEndPos >= 0) {
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handleComment(getChars(0, commentEndPos)); |
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try {
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in.close(); |
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in = new CharArrayReader(getChars(commentEndPos + 1)); |
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ch = '>'; |
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} catch (IOException e) {
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error("ioexception");
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} |
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resetStrBuffer(); |
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} else {
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// no newline, so signal an error |
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error("eof.comment");
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} |
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} |
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/** |
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* Called when an empty tag is encountered. |
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*/ |
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protected void handleEmptyTag(TagElement tag) throws ChangedCharSetException {
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} |
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/** |
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* Called when a start tag is encountered. |
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*/ |
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protected void handleStartTag(TagElement tag) {
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} |
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/** |
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* Called when an end tag is encountered. |
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*/ |
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protected void handleEndTag(TagElement tag) {
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} |
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/** |
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* An error has occurred. |
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*/ |
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protected void handleError(int ln, String msg) {
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/* |
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Thread.dumpStack(); |
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System.out.println("**** " + stack);
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System.out.println("line " + ln + ": error: " + msg);
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System.out.println(); |
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*/ |
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} |
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/** |
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* Output text. |
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*/ |
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void handleText(TagElement tag) {
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if (tag.breaksFlow()) {
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space = false; |
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if (!strict) {
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ignoreSpace = true; |
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} |
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} |
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if (textpos == 0) {
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if ((!space) || (stack == null) || last.breaksFlow() || |
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!stack.advance(dtd.pcdata)) {
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last = tag; |
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space = false; |
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lastBlockStartPos = currentBlockStartPos; |
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return; |
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} |
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} |
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if (space) {
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if (!ignoreSpace) {
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// enlarge buffer if needed |
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if (textpos + 1 > text.length) {
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char newtext[] = new char[text.length + 200]; |
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System.arraycopy(text, 0, newtext, 0, text.length); |
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text = newtext; |
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} |
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// output pending space |
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text[textpos++] = ' '; |
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if (!strict && !tag.getElement().isEmpty()) {
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ignoreSpace = true; |
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} |
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} |
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space = false; |
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} |
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char newtext[] = new char[textpos]; |
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System.arraycopy(text, 0, newtext, 0, textpos); |
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// Handles cases of bad html where the title tag |
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// was getting lost when we did error recovery. |
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if (tag.getElement().getName().equals("title")) {
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handleTitle(newtext); |
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} else {
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handleText(newtext); |
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} |
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lastBlockStartPos = currentBlockStartPos; |
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textpos = 0; |
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last = tag; |
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space = false; |
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} |
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/** |
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* Invoke the error handler. |
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*/ |
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protected void error(String err, String arg1, String arg2, |
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String arg3) {
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handleError(ln, err + " " + arg1 + " " + arg2 + " " + arg3); |
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} |
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protected void error(String err, String arg1, String arg2) {
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error(err, arg1, arg2, "?"); |
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} |
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protected void error(String err, String arg1) {
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error(err, arg1, "?", "?"); |
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} |
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protected void error(String err) {
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error(err, "?", "?", "?"); |
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} |
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/** |
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* Handle a start tag. The new tag is pushed |
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* onto the tag stack. The attribute list is |
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* checked for required attributes. |
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*/ |
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protected void startTag(TagElement tag) throws ChangedCharSetException {
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Element elem = tag.getElement(); |
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// If the tag is an empty tag and texpos != 0 |
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// this implies that there is text before the |
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// start tag that needs to be processed before |
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// handling the tag. |
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// |
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if (!elem.isEmpty() || |
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((last != null) && !last.breaksFlow()) || |
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(textpos != 0)) {
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handleText(tag); |
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} else {
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// this variable gets updated in handleText(). |
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// Since in this case we do not call handleText() |
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// we need to update it here. |
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// |
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last = tag; |
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// Note that we should really check last.breakFlows before |
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// assuming this should be false. |
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space = false; |
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} |
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lastBlockStartPos = currentBlockStartPos; |
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// check required attributes |
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for (AttributeList a = elem.atts ; a != null ; a = a.next) {
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if ((a.modifier == REQUIRED) && |
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((attributes.isEmpty()) || |
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((!attributes.isDefined(a.name)) && |
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(!attributes.isDefined(HTML.getAttributeKey(a.name)))))) {
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error("req.att ", a.getName(), elem.getName());
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} |
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} |
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if (elem.isEmpty()) {
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handleEmptyTag(tag); |
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/* |
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} else if (elem.getName().equals("form")) {
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handleStartTag(tag); |
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*/ |
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} else {
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recent = elem; |
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stack = new TagStack(tag, stack); |
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handleStartTag(tag); |
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} |
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} |
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/** |
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* Handle an end tag. The end tag is popped |
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* from the tag stack. |
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*/ |
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protected void endTag(boolean omitted) {
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handleText(stack.tag); |
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if (omitted && !stack.elem.omitEnd()) {
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error("end.missing", stack.elem.getName());
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} else if (!stack.terminate()) {
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error("end.unexpected", stack.elem.getName());
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} |
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// handle the tag |
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handleEndTag(stack.tag); |
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stack = stack.next; |
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recent = (stack != null) ? stack.elem : null; |
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} |
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||
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boolean ignoreElement(Element elem) {
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String stackElement = stack.elem.getName(); |
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String elemName = elem.getName(); |
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/* We ignore all elements that are not valid in the context of |
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a table except <td>, <th> (these we handle in |
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legalElementContext()) and #pcdata. We also ignore the |
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<font> tag in the context of <ul> and <ol> We additonally |
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ignore the <meta> and the <style> tag if the body tag has |
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been seen. **/ |
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if ((elemName.equals("html") && seenHtml) ||
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(elemName.equals("head") && seenHead) ||
|
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(elemName.equals("body") && seenBody)) {
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return true; |
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} |
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if (elemName.equals("dt") || elemName.equals("dd")) {
|
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TagStack s = stack; |
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while (s != null && !s.elem.getName().equals("dl")) {
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s = s.next; |
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} |
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if (s == null) {
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|
482 |
return true; |
|
483 |
} |
|
484 |
} |
|
485 |
||
486 |
if (((stackElement.equals("table")) &&
|
|
487 |
(!elemName.equals("#pcdata")) && (!elemName.equals("input"))) ||
|
|
488 |
((elemName.equals("font")) &&
|
|
489 |
(stackElement.equals("ul") || stackElement.equals("ol"))) ||
|
|
490 |
(elemName.equals("meta") && stack != null) ||
|
|
491 |
(elemName.equals("style") && seenBody) ||
|
|
492 |
(stackElement.equals("table") && elemName.equals("a"))) {
|
|
493 |
return true; |
|
494 |
} |
|
495 |
return false; |
|
496 |
} |
|
497 |
||
498 |
||
499 |
/** |
|
500 |
* Marks the first time a tag has been seen in a document |
|
501 |
*/ |
|
502 |
||
503 |
protected void markFirstTime(Element elem) {
|
|
504 |
String elemName = elem.getName(); |
|
505 |
if (elemName.equals("html")) {
|
|
506 |
seenHtml = true; |
|
507 |
} else if (elemName.equals("head")) {
|
|
508 |
seenHead = true; |
|
509 |
} else if (elemName.equals("body")) {
|
|
510 |
if (buf.length == 1) {
|
|
511 |
// Refer to note in definition of buf for details on this. |
|
512 |
char[] newBuf = new char[256]; |
|
513 |
||
514 |
newBuf[0] = buf[0]; |
|
515 |
buf = newBuf; |
|
516 |
} |
|
517 |
seenBody = true; |
|
518 |
} |
|
519 |
} |
|
520 |
||
521 |
/** |
|
522 |
* Create a legal content for an element. |
|
523 |
*/ |
|
524 |
boolean legalElementContext(Element elem) throws ChangedCharSetException {
|
|
525 |
||
526 |
// System.out.println("-- legalContext -- " + elem);
|
|
527 |
||
528 |
// Deal with the empty stack |
|
529 |
if (stack == null) {
|
|
530 |
// System.out.println("-- stack is empty");
|
|
531 |
if (elem != dtd.html) {
|
|
532 |
// System.out.println("-- pushing html");
|
|
533 |
startTag(makeTag(dtd.html, true)); |
|
534 |
return legalElementContext(elem); |
|
535 |
} |
|
536 |
return true; |
|
537 |
} |
|
538 |
||
539 |
// Is it allowed in the current context |
|
540 |
if (stack.advance(elem)) {
|
|
541 |
// System.out.println("-- legal context");
|
|
542 |
markFirstTime(elem); |
|
543 |
return true; |
|
544 |
} |
|
545 |
boolean insertTag = false; |
|
546 |
||
547 |
// The use of all error recovery strategies are contingent |
|
548 |
// on the value of the strict property. |
|
549 |
// |
|
550 |
// These are commonly occuring errors. if insertTag is true, |
|
551 |
// then we want to adopt an error recovery strategy that |
|
552 |
// involves attempting to insert an additional tag to |
|
553 |
// legalize the context. The two errors addressed here |
|
554 |
// are: |
|
555 |
// 1) when a <td> or <th> is seen soon after a <table> tag. |
|
556 |
// In this case we insert a <tr>. |
|
557 |
// 2) when any other tag apart from a <tr> is seen |
|
558 |
// in the context of a <tr>. In this case we would |
|
559 |
// like to add a <td>. If a <tr> is seen within a |
|
560 |
// <tr> context, then we will close out the current |
|
561 |
// <tr>. |
|
562 |
// |
|
563 |
// This insertion strategy is handled later in the method. |
|
564 |
// The reason for checking this now, is that in other cases |
|
565 |
// we would like to apply other error recovery strategies for example |
|
566 |
// ignoring tags. |
|
567 |
// |
|
568 |
// In certain cases it is better to ignore a tag than try to |
|
569 |
// fix the situation. So the first test is to see if this |
|
570 |
// is what we need to do. |
|
571 |
// |
|
572 |
String stackElemName = stack.elem.getName(); |
|
573 |
String elemName = elem.getName(); |
|
574 |
||
575 |
||
576 |
if (!strict && |
|
577 |
((stackElemName.equals("table") && elemName.equals("td")) ||
|
|
578 |
(stackElemName.equals("table") && elemName.equals("th")) ||
|
|
579 |
(stackElemName.equals("tr") && !elemName.equals("tr")))){
|
|
580 |
insertTag = true; |
|
581 |
} |
|
582 |
||
583 |
||
584 |
if (!strict && !insertTag && (stack.elem.getName() != elem.getName() || |
|
585 |
elem.getName().equals("body"))) {
|
|
586 |
if (skipTag = ignoreElement(elem)) {
|
|
587 |
error("tag.ignore", elem.getName());
|
|
588 |
return skipTag; |
|
589 |
} |
|
590 |
} |
|
591 |
||
592 |
// Check for anything after the start of the table besides tr, td, th |
|
593 |
// or caption, and if those aren't there, insert the <tr> and call |
|
594 |
// legalElementContext again. |
|
595 |
if (!strict && stackElemName.equals("table") &&
|
|
596 |
!elemName.equals("tr") && !elemName.equals("td") &&
|
|
597 |
!elemName.equals("th") && !elemName.equals("caption")) {
|
|
598 |
Element e = dtd.getElement("tr");
|
|
599 |
TagElement t = makeTag(e, true); |
|
600 |
legalTagContext(t); |
|
601 |
startTag(t); |
|
602 |
error("start.missing", elem.getName());
|
|
603 |
return legalElementContext(elem); |
|
604 |
} |
|
605 |
||
606 |
// They try to find a legal context by checking if the current |
|
607 |
// tag is valid in an enclosing context. If so |
|
608 |
// close out the tags by outputing end tags and then |
|
609 |
// insert the curent tag. If the tags that are |
|
610 |
// being closed out do not have an optional end tag |
|
611 |
// specification in the DTD then an html error is |
|
612 |
// reported. |
|
613 |
// |
|
614 |
if (!insertTag && stack.terminate() && (!strict || stack.elem.omitEnd())) {
|
|
615 |
for (TagStack s = stack.next ; s != null ; s = s.next) {
|
|
616 |
if (s.advance(elem)) {
|
|
617 |
while (stack != s) {
|
|
618 |
endTag(true); |
|
619 |
} |
|
620 |
return true; |
|
621 |
} |
|
622 |
if (!s.terminate() || (strict && !s.elem.omitEnd())) {
|
|
623 |
break; |
|
624 |
} |
|
625 |
} |
|
626 |
} |
|
627 |
||
628 |
// Check if we know what tag is expected next. |
|
629 |
// If so insert the tag. Report an error if the |
|
630 |
// tag does not have its start tag spec in the DTD as optional. |
|
631 |
// |
|
632 |
Element next = stack.first(); |
|
633 |
if (next != null && (!strict || next.omitStart()) && |
|
634 |
!(next==dtd.head && elem==dtd.pcdata) ) {
|
|
635 |
// System.out.println("-- omitting start tag: " + next);
|
|
636 |
TagElement t = makeTag(next, true); |
|
637 |
legalTagContext(t); |
|
638 |
startTag(t); |
|
639 |
if (!next.omitStart()) {
|
|
640 |
error("start.missing", elem.getName());
|
|
641 |
} |
|
642 |
return legalElementContext(elem); |
|
643 |
} |
|
644 |
||
645 |
||
646 |
// Traverse the list of expected elements and determine if adding |
|
647 |
// any of these elements would make for a legal context. |
|
648 |
// |
|
649 |
||
650 |
if (!strict) {
|
|
651 |
ContentModel content = stack.contentModel(); |
|
|
1287
a04aca99c77a
6722802: Code improvement and warnings removing from the javax.swing.text package
rupashka
parents:
438
diff
changeset
|
652 |
Vector<Element> elemVec = new Vector<Element>(); |
| 2 | 653 |
if (content != null) {
|
654 |
content.getElements(elemVec); |
|
|
1287
a04aca99c77a
6722802: Code improvement and warnings removing from the javax.swing.text package
rupashka
parents:
438
diff
changeset
|
655 |
for (Element e : elemVec) {
|
| 2 | 656 |
// Ensure that this element has not been included as |
657 |
// part of the exclusions in the DTD. |
|
658 |
// |
|
659 |
if (stack.excluded(e.getIndex())) {
|
|
660 |
continue; |
|
661 |
} |
|
662 |
||
663 |
boolean reqAtts = false; |
|
664 |
||
665 |
for (AttributeList a = e.getAttributes(); a != null ; a = a.next) {
|
|
666 |
if (a.modifier == REQUIRED) {
|
|
667 |
reqAtts = true; |
|
668 |
break; |
|
669 |
} |
|
670 |
} |
|
671 |
// Ensure that no tag that has required attributes |
|
672 |
// gets inserted. |
|
673 |
// |
|
674 |
if (reqAtts) {
|
|
675 |
continue; |
|
676 |
} |
|
677 |
||
678 |
ContentModel m = e.getContent(); |
|
679 |
if (m != null && m.first(elem)) {
|
|
680 |
// System.out.println("-- adding a legal tag: " + e);
|
|
681 |
TagElement t = makeTag(e, true); |
|
682 |
legalTagContext(t); |
|
683 |
startTag(t); |
|
684 |
error("start.missing", e.getName());
|
|
685 |
return legalElementContext(elem); |
|
686 |
} |
|
687 |
} |
|
688 |
} |
|
689 |
} |
|
690 |
||
691 |
// Check if the stack can be terminated. If so add the appropriate |
|
692 |
// end tag. Report an error if the tag being ended does not have its |
|
693 |
// end tag spec in the DTD as optional. |
|
694 |
// |
|
695 |
if (stack.terminate() && (stack.elem != dtd.body) && (!strict || stack.elem.omitEnd())) {
|
|
696 |
// System.out.println("-- omitting end tag: " + stack.elem);
|
|
697 |
if (!stack.elem.omitEnd()) {
|
|
698 |
error("end.missing", elem.getName());
|
|
699 |
} |
|
700 |
||
701 |
endTag(true); |
|
702 |
return legalElementContext(elem); |
|
703 |
} |
|
704 |
||
705 |
// At this point we know that something is screwed up. |
|
706 |
return false; |
|
707 |
} |
|
708 |
||
709 |
/** |
|
710 |
* Create a legal context for a tag. |
|
711 |
*/ |
|
712 |
void legalTagContext(TagElement tag) throws ChangedCharSetException {
|
|
713 |
if (legalElementContext(tag.getElement())) {
|
|
714 |
markFirstTime(tag.getElement()); |
|
715 |
return; |
|
716 |
} |
|
717 |
||
718 |
// Avoid putting a block tag in a flow tag. |
|
719 |
if (tag.breaksFlow() && (stack != null) && !stack.tag.breaksFlow()) {
|
|
720 |
endTag(true); |
|
721 |
legalTagContext(tag); |
|
722 |
return; |
|
723 |
} |
|
724 |
||
725 |
// Avoid putting something wierd in the head of the document. |
|
726 |
for (TagStack s = stack ; s != null ; s = s.next) {
|
|
727 |
if (s.tag.getElement() == dtd.head) {
|
|
728 |
while (stack != s) {
|
|
729 |
endTag(true); |
|
730 |
} |
|
731 |
endTag(true); |
|
732 |
legalTagContext(tag); |
|
733 |
return; |
|
734 |
} |
|
735 |
} |
|
736 |
||
737 |
// Everything failed |
|
738 |
error("tag.unexpected", tag.getElement().getName());
|
|
739 |
} |
|
740 |
||
741 |
/** |
|
742 |
* Error context. Something went wrong, make sure we are in |
|
743 |
* the document's body context |
|
744 |
*/ |
|
745 |
void errorContext() throws ChangedCharSetException {
|
|
746 |
for (; (stack != null) && (stack.tag.getElement() != dtd.body) ; stack = stack.next) {
|
|
747 |
handleEndTag(stack.tag); |
|
748 |
} |
|
749 |
if (stack == null) {
|
|
750 |
legalElementContext(dtd.body); |
|
751 |
startTag(makeTag(dtd.body, true)); |
|
752 |
} |
|
753 |
} |
|
754 |
||
755 |
/** |
|
756 |
* Add a char to the string buffer. |
|
757 |
*/ |
|
758 |
void addString(int c) {
|
|
759 |
if (strpos == str.length) {
|
|
760 |
char newstr[] = new char[str.length + 128]; |
|
761 |
System.arraycopy(str, 0, newstr, 0, str.length); |
|
762 |
str = newstr; |
|
763 |
} |
|
764 |
str[strpos++] = (char)c; |
|
765 |
} |
|
766 |
||
767 |
/** |
|
768 |
* Get the string that's been accumulated. |
|
769 |
*/ |
|
770 |
String getString(int pos) {
|
|
771 |
char newStr[] = new char[strpos - pos]; |
|
772 |
System.arraycopy(str, pos, newStr, 0, strpos - pos); |
|
773 |
strpos = pos; |
|
774 |
return new String(newStr); |
|
775 |
} |
|
776 |
||
777 |
char[] getChars(int pos) {
|
|
778 |
char newStr[] = new char[strpos - pos]; |
|
779 |
System.arraycopy(str, pos, newStr, 0, strpos - pos); |
|
780 |
strpos = pos; |
|
781 |
return newStr; |
|
782 |
} |
|
783 |
||
784 |
char[] getChars(int pos, int endPos) {
|
|
785 |
char newStr[] = new char[endPos - pos]; |
|
786 |
System.arraycopy(str, pos, newStr, 0, endPos - pos); |
|
787 |
// REMIND: it's not clear whether this version should set strpos or not |
|
788 |
// strpos = pos; |
|
789 |
return newStr; |
|
790 |
} |
|
791 |
||
792 |
void resetStrBuffer() {
|
|
793 |
strpos = 0; |
|
794 |
} |
|
795 |
||
796 |
int strIndexOf(char target) {
|
|
797 |
for (int i = 0; i < strpos; i++) {
|
|
798 |
if (str[i] == target) {
|
|
799 |
return i; |
|
800 |
} |
|
801 |
} |
|
802 |
||
803 |
return -1; |
|
804 |
} |
|
805 |
||
806 |
/** |
|
807 |
* Skip space. |
|
808 |
* [5] 297:5 |
|
809 |
*/ |
|
810 |
void skipSpace() throws IOException {
|
|
811 |
while (true) {
|
|
812 |
switch (ch) {
|
|
813 |
case '\n': |
|
814 |
ln++; |
|
815 |
ch = readCh(); |
|
816 |
lfCount++; |
|
817 |
break; |
|
818 |
||
819 |
case '\r': |
|
820 |
ln++; |
|
821 |
if ((ch = readCh()) == '\n') {
|
|
822 |
ch = readCh(); |
|
823 |
crlfCount++; |
|
824 |
} |
|
825 |
else {
|
|
826 |
crCount++; |
|
827 |
} |
|
828 |
break; |
|
829 |
case ' ': |
|
830 |
case '\t': |
|
831 |
ch = readCh(); |
|
832 |
break; |
|
833 |
||
834 |
default: |
|
835 |
return; |
|
836 |
} |
|
837 |
} |
|
838 |
} |
|
839 |
||
840 |
/** |
|
841 |
* Parse identifier. Uppercase characters are folded |
|
842 |
* to lowercase when lower is true. Returns falsed if |
|
843 |
* no identifier is found. [55] 346:17 |
|
844 |
*/ |
|
845 |
boolean parseIdentifier(boolean lower) throws IOException {
|
|
846 |
switch (ch) {
|
|
847 |
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': |
|
848 |
case 'G': case 'H': case 'I': case 'J': case 'K': case 'L': |
|
849 |
case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R': |
|
850 |
case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': |
|
851 |
case 'Y': case 'Z': |
|
852 |
if (lower) {
|
|
853 |
ch = 'a' + (ch - 'A'); |
|
854 |
} |
|
855 |
||
856 |
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': |
|
857 |
case 'g': case 'h': case 'i': case 'j': case 'k': case 'l': |
|
858 |
case 'm': case 'n': case 'o': case 'p': case 'q': case 'r': |
|
859 |
case 's': case 't': case 'u': case 'v': case 'w': case 'x': |
|
860 |
case 'y': case 'z': |
|
861 |
break; |
|
862 |
||
863 |
default: |
|
864 |
return false; |
|
865 |
} |
|
866 |
||
867 |
while (true) {
|
|
868 |
addString(ch); |
|
869 |
||
870 |
switch (ch = readCh()) {
|
|
871 |
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': |
|
872 |
case 'G': case 'H': case 'I': case 'J': case 'K': case 'L': |
|
873 |
case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R': |
|
874 |
case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': |
|
875 |
case 'Y': case 'Z': |
|
876 |
if (lower) {
|
|
877 |
ch = 'a' + (ch - 'A'); |
|
878 |
} |
|
879 |
||
880 |
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': |
|
881 |
case 'g': case 'h': case 'i': case 'j': case 'k': case 'l': |
|
882 |
case 'm': case 'n': case 'o': case 'p': case 'q': case 'r': |
|
883 |
case 's': case 't': case 'u': case 'v': case 'w': case 'x': |
|
884 |
case 'y': case 'z': |
|
885 |
||
886 |
case '0': case '1': case '2': case '3': case '4': |
|
887 |
case '5': case '6': case '7': case '8': case '9': |
|
888 |
||
889 |
case '.': case '-': |
|
890 |
||
891 |
case '_': // not officially allowed |
|
892 |
break; |
|
893 |
||
894 |
default: |
|
895 |
return true; |
|
896 |
} |
|
897 |
} |
|
898 |
} |
|
899 |
||
900 |
/** |
|
901 |
* Parse an entity reference. [59] 350:17 |
|
902 |
*/ |
|
903 |
private char[] parseEntityReference() throws IOException {
|
|
904 |
int pos = strpos; |
|
905 |
||
906 |
if ((ch = readCh()) == '#') {
|
|
907 |
int n = 0; |
|
908 |
ch = readCh(); |
|
909 |
if ((ch >= '0') && (ch <= '9') || |
|
910 |
ch == 'x' || ch == 'X') {
|
|
911 |
||
912 |
if ((ch >= '0') && (ch <= '9')) {
|
|
913 |
// parse decimal reference |
|
914 |
while ((ch >= '0') && (ch <= '9')) {
|
|
915 |
n = (n * 10) + ch - '0'; |
|
916 |
ch = readCh(); |
|
917 |
} |
|
918 |
} else {
|
|
919 |
// parse hexadecimal reference |
|
920 |
ch = readCh(); |
|
921 |
char lch = (char) Character.toLowerCase(ch); |
|
922 |
while ((lch >= '0') && (lch <= '9') || |
|
923 |
(lch >= 'a') && (lch <= 'f')) {
|
|
924 |
if (lch >= '0' && lch <= '9') {
|
|
925 |
n = (n * 16) + lch - '0'; |
|
926 |
} else {
|
|
927 |
n = (n * 16) + lch - 'a' + 10; |
|
928 |
} |
|
929 |
ch = readCh(); |
|
930 |
lch = (char) Character.toLowerCase(ch); |
|
931 |
} |
|
932 |
} |
|
933 |
switch (ch) {
|
|
934 |
case '\n': |
|
935 |
ln++; |
|
936 |
ch = readCh(); |
|
937 |
lfCount++; |
|
938 |
break; |
|
939 |
||
940 |
case '\r': |
|
941 |
ln++; |
|
942 |
if ((ch = readCh()) == '\n') {
|
|
943 |
ch = readCh(); |
|
944 |
crlfCount++; |
|
945 |
} |
|
946 |
else {
|
|
947 |
crCount++; |
|
948 |
} |
|
949 |
break; |
|
950 |
||
951 |
case ';': |
|
952 |
ch = readCh(); |
|
953 |
break; |
|
954 |
} |
|
955 |
char data[] = {mapNumericReference((char) n)};
|
|
956 |
return data; |
|
957 |
} |
|
958 |
addString('#');
|
|
959 |
if (!parseIdentifier(false)) {
|
|
960 |
error("ident.expected");
|
|
961 |
strpos = pos; |
|
962 |
char data[] = {'&', '#'};
|
|
963 |
return data; |
|
964 |
} |
|
965 |
} else if (!parseIdentifier(false)) {
|
|
966 |
char data[] = {'&'};
|
|
967 |
return data; |
|
968 |
} |
|
969 |
switch (ch) {
|
|
970 |
case '\n': |
|
971 |
ln++; |
|
972 |
ch = readCh(); |
|
973 |
lfCount++; |
|
974 |
break; |
|
975 |
||
976 |
case '\r': |
|
977 |
ln++; |
|
978 |
if ((ch = readCh()) == '\n') {
|
|
979 |
ch = readCh(); |
|
980 |
crlfCount++; |
|
981 |
} |
|
982 |
else {
|
|
983 |
crCount++; |
|
984 |
} |
|
985 |
break; |
|
986 |
||
987 |
case ';': |
|
988 |
ch = readCh(); |
|
989 |
break; |
|
990 |
} |
|
991 |
||
992 |
String nm = getString(pos); |
|
993 |
Entity ent = dtd.getEntity(nm); |
|
994 |
||
995 |
// entities are case sensitive - however if strict |
|
996 |
// is false then we will try to make a match by |
|
997 |
// converting the string to all lowercase. |
|
998 |
// |
|
999 |
if (!strict && (ent == null)) {
|
|
1000 |
ent = dtd.getEntity(nm.toLowerCase()); |
|
1001 |
} |
|
1002 |
if ((ent == null) || !ent.isGeneral()) {
|
|
1003 |
||
1004 |
if (nm.length() == 0) {
|
|
1005 |
error("invalid.entref", nm);
|
|
1006 |
return new char[0]; |
|
1007 |
} |
|
1008 |
/* given that there is not a match restore the entity reference */ |
|
1009 |
String str = "&" + nm + ";"; |
|
1010 |
||
1011 |
char b[] = new char[str.length()]; |
|
1012 |
str.getChars(0, b.length, b, 0); |
|
1013 |
return b; |
|
1014 |
} |
|
1015 |
return ent.getData(); |
|
1016 |
} |
|
1017 |
||
1018 |
/** |
|
1019 |
* Converts numeric character reference to Unicode character. |
|
1020 |
* |
|
1021 |
* Normally the code in a reference should be always converted |
|
1022 |
* to the Unicode character with the same code, but due to |
|
1023 |
* wide usage of Cp1252 charset most browsers map numeric references |
|
1024 |
* in the range 130-159 (which are control chars in Unicode set) |
|
1025 |
* to displayable characters with other codes. |
|
1026 |
* |
|
1027 |
* @param c the code of numeric character reference. |
|
1028 |
* @return the character corresponding to the reference code. |
|
1029 |
*/ |
|
1030 |
private char mapNumericReference(char c) {
|
|
1031 |
if (c < 130 || c > 159) {
|
|
1032 |
return c; |
|
1033 |
} |
|
1034 |
return cp1252Map[c - 130]; |
|
1035 |
} |
|
1036 |
||
1037 |
/** |
|
1038 |
* Parse a comment. [92] 391:7 |
|
1039 |
*/ |
|
1040 |
void parseComment() throws IOException {
|
|
1041 |
||
1042 |
while (true) {
|
|
1043 |
int c = ch; |
|
1044 |
switch (c) {
|
|
1045 |
case '-': |
|
1046 |
/** Presuming that the start string of a comment "<!--" has |
|
1047 |
already been parsed, the '-' character is valid only as |
|
1048 |
part of a comment termination and further more it must |
|
1049 |
be present in even numbers. Hence if strict is true, we |
|
1050 |
presume the comment has been terminated and return. |
|
1051 |
However if strict is false, then there is no even number |
|
1052 |
requirement and this character can appear anywhere in the |
|
1053 |
comment. The parser reads on until it sees the following |
|
1054 |
pattern: "-->" or "--!>". |
|
1055 |
**/ |
|
1056 |
if (!strict && (strpos != 0) && (str[strpos - 1] == '-')) {
|
|
1057 |
if ((ch = readCh()) == '>') {
|
|
1058 |
return; |
|
1059 |
} |
|
1060 |
if (ch == '!') {
|
|
1061 |
if ((ch = readCh()) == '>') {
|
|
1062 |
return; |
|
1063 |
} else {
|
|
1064 |
/* to account for extra read()'s that happened */ |
|
1065 |
addString('-');
|
|
1066 |
addString('!');
|
|
1067 |
continue; |
|
1068 |
} |
|
1069 |
} |
|
1070 |
break; |
|
1071 |
} |
|
1072 |
||
1073 |
if ((ch = readCh()) == '-') {
|
|
1074 |
ch = readCh(); |
|
1075 |
if (strict || ch == '>') {
|
|
1076 |
return; |
|
1077 |
} |
|
1078 |
if (ch == '!') {
|
|
1079 |
if ((ch = readCh()) == '>') {
|
|
1080 |
return; |
|
1081 |
} else {
|
|
1082 |
/* to account for extra read()'s that happened */ |
|
1083 |
addString('-');
|
|
1084 |
addString('!');
|
|
1085 |
continue; |
|
1086 |
} |
|
1087 |
} |
|
1088 |
/* to account for the extra read() */ |
|
1089 |
addString('-');
|
|
1090 |
} |
|
1091 |
break; |
|
1092 |
||
1093 |
case -1: |
|
1094 |
handleEOFInComment(); |
|
1095 |
return; |
|
1096 |
||
1097 |
case '\n': |
|
1098 |
ln++; |
|
1099 |
ch = readCh(); |
|
1100 |
lfCount++; |
|
1101 |
break; |
|
1102 |
||
1103 |
case '>': |
|
1104 |
ch = readCh(); |
|
1105 |
break; |
|
1106 |
||
1107 |
case '\r': |
|
1108 |
ln++; |
|
1109 |
if ((ch = readCh()) == '\n') {
|
|
1110 |
ch = readCh(); |
|
1111 |
crlfCount++; |
|
1112 |
} |
|
1113 |
else {
|
|
1114 |
crCount++; |
|
1115 |
} |
|
1116 |
c = '\n'; |
|
1117 |
break; |
|
1118 |
default: |
|
1119 |
ch = readCh(); |
|
1120 |
break; |
|
1121 |
} |
|
1122 |
||
1123 |
addString(c); |
|
1124 |
} |
|
1125 |
} |
|
1126 |
||
1127 |
/** |
|
1128 |
* Parse literal content. [46] 343:1 and [47] 344:1 |
|
1129 |
*/ |
|
1130 |
void parseLiteral(boolean replace) throws IOException {
|
|
1131 |
while (true) {
|
|
1132 |
int c = ch; |
|
1133 |
switch (c) {
|
|
1134 |
case -1: |
|
1135 |
error("eof.literal", stack.elem.getName());
|
|
1136 |
endTag(true); |
|
1137 |
return; |
|
1138 |
||
1139 |
case '>': |
|
1140 |
ch = readCh(); |
|
1141 |
int i = textpos - (stack.elem.name.length() + 2), j = 0; |
|
1142 |
||
1143 |
// match end tag |
|
1144 |
if ((i >= 0) && (text[i++] == '<') && (text[i] == '/')) {
|
|
1145 |
while ((++i < textpos) && |
|
1146 |
(Character.toLowerCase(text[i]) == stack.elem.name.charAt(j++))); |
|
1147 |
if (i == textpos) {
|
|
1148 |
textpos -= (stack.elem.name.length() + 2); |
|
1149 |
if ((textpos > 0) && (text[textpos-1] == '\n')) {
|
|
1150 |
textpos--; |
|
1151 |
} |
|
1152 |
endTag(false); |
|
1153 |
return; |
|
1154 |
} |
|
1155 |
} |
|
1156 |
break; |
|
1157 |
||
1158 |
case '&': |
|
1159 |
char data[] = parseEntityReference(); |
|
1160 |
if (textpos + data.length > text.length) {
|
|
1161 |
char newtext[] = new char[Math.max(textpos + data.length + 128, text.length * 2)]; |
|
1162 |
System.arraycopy(text, 0, newtext, 0, text.length); |
|
1163 |
text = newtext; |
|
1164 |
} |
|
1165 |
System.arraycopy(data, 0, text, textpos, data.length); |
|
1166 |
textpos += data.length; |
|
1167 |
continue; |
|
1168 |
||
1169 |
case '\n': |
|
1170 |
ln++; |
|
1171 |
ch = readCh(); |
|
1172 |
lfCount++; |
|
1173 |
break; |
|
1174 |
||
1175 |
case '\r': |
|
1176 |
ln++; |
|
1177 |
if ((ch = readCh()) == '\n') {
|
|
1178 |
ch = readCh(); |
|
1179 |
crlfCount++; |
|
1180 |
} |
|
1181 |
else {
|
|
1182 |
crCount++; |
|
1183 |
} |
|
1184 |
c = '\n'; |
|
1185 |
break; |
|
1186 |
default: |
|
1187 |
ch = readCh(); |
|
1188 |
break; |
|
1189 |
} |
|
1190 |
||
1191 |
// output character |
|
1192 |
if (textpos == text.length) {
|
|
1193 |
char newtext[] = new char[text.length + 128]; |
|
1194 |
System.arraycopy(text, 0, newtext, 0, text.length); |
|
1195 |
text = newtext; |
|
1196 |
} |
|
1197 |
text[textpos++] = (char)c; |
|
1198 |
} |
|
1199 |
} |
|
1200 |
||
1201 |
/** |
|
1202 |
* Parse attribute value. [33] 331:1 |
|
1203 |
*/ |
|
1204 |
String parseAttributeValue(boolean lower) throws IOException {
|
|
1205 |
int delim = -1; |
|
1206 |
||
1207 |
// Check for a delimiter |
|
1208 |
switch(ch) {
|
|
1209 |
case '\'': |
|
1210 |
case '"': |
|
1211 |
delim = ch; |
|
1212 |
ch = readCh(); |
|
1213 |
break; |
|
1214 |
} |
|
1215 |
||
1216 |
// Parse the rest of the value |
|
1217 |
while (true) {
|
|
1218 |
int c = ch; |
|
1219 |
||
1220 |
switch (c) {
|
|
1221 |
case '\n': |
|
1222 |
ln++; |
|
1223 |
ch = readCh(); |
|
1224 |
lfCount++; |
|
1225 |
if (delim < 0) {
|
|
1226 |
return getString(0); |
|
1227 |
} |
|
1228 |
break; |
|
1229 |
||
1230 |
case '\r': |
|
1231 |
ln++; |
|
1232 |
||
1233 |
if ((ch = readCh()) == '\n') {
|
|
1234 |
ch = readCh(); |
|
1235 |
crlfCount++; |
|
1236 |
} |
|
1237 |
else {
|
|
1238 |
crCount++; |
|
1239 |
} |
|
1240 |
if (delim < 0) {
|
|
1241 |
return getString(0); |
|
1242 |
} |
|
1243 |
break; |
|
1244 |
||
1245 |
case '\t': |
|
1246 |
if (delim < 0) |
|
1247 |
c = ' '; |
|
1248 |
case ' ': |
|
1249 |
ch = readCh(); |
|
1250 |
if (delim < 0) {
|
|
1251 |
return getString(0); |
|
1252 |
} |
|
1253 |
break; |
|
1254 |
||
1255 |
case '>': |
|
1256 |
case '<': |
|
1257 |
if (delim < 0) {
|
|
1258 |
return getString(0); |
|
1259 |
} |
|
1260 |
ch = readCh(); |
|
1261 |
break; |
|
1262 |
||
1263 |
case '\'': |
|
1264 |
case '"': |
|
1265 |
ch = readCh(); |
|
1266 |
if (c == delim) {
|
|
1267 |
return getString(0); |
|
1268 |
} else if (delim == -1) {
|
|
1269 |
error("attvalerr");
|
|
1270 |
if (strict || ch == ' ') {
|
|
1271 |
return getString(0); |
|
1272 |
} else {
|
|
1273 |
continue; |
|
1274 |
} |
|
1275 |
} |
|
1276 |
break; |
|
1277 |
||
1278 |
case '=': |
|
1279 |
if (delim < 0) {
|
|
1280 |
/* In SGML a construct like <img src=/cgi-bin/foo?x=1> |
|
1281 |
is considered invalid since an = sign can only be contained |
|
1282 |
in an attributes value if the string is quoted. |
|
1283 |
*/ |
|
1284 |
error("attvalerr");
|
|
1285 |
/* If strict is true then we return with the string we have thus far. |
|
1286 |
Otherwise we accept the = sign as part of the attribute's value and |
|
1287 |
process the rest of the img tag. */ |
|
1288 |
if (strict) {
|
|
1289 |
return getString(0); |
|
1290 |
} |
|
1291 |
} |
|
1292 |
ch = readCh(); |
|
1293 |
break; |
|
1294 |
||
1295 |
case '&': |
|
1296 |
if (strict && delim < 0) {
|
|
1297 |
ch = readCh(); |
|
1298 |
break; |
|
1299 |
} |
|
1300 |
||
1301 |
char data[] = parseEntityReference(); |
|
1302 |
for (int i = 0 ; i < data.length ; i++) {
|
|
1303 |
c = data[i]; |
|
1304 |
addString((lower && (c >= 'A') && (c <= 'Z')) ? 'a' + c - 'A' : c); |
|
1305 |
} |
|
1306 |
continue; |
|
1307 |
||
1308 |
case -1: |
|
1309 |
return getString(0); |
|
1310 |
||
1311 |
default: |
|
1312 |
if (lower && (c >= 'A') && (c <= 'Z')) {
|
|
1313 |
c = 'a' + c - 'A'; |
|
1314 |
} |
|
1315 |
ch = readCh(); |
|
1316 |
break; |
|
1317 |
} |
|
1318 |
addString(c); |
|
1319 |
} |
|
1320 |
} |
|
1321 |
||
1322 |
||
1323 |
/** |
|
1324 |
* Parse attribute specification List. [31] 327:17 |
|
1325 |
*/ |
|
1326 |
void parseAttributeSpecificationList(Element elem) throws IOException {
|
|
1327 |
||
1328 |
while (true) {
|
|
1329 |
skipSpace(); |
|
1330 |
||
1331 |
switch (ch) {
|
|
1332 |
case '/': |
|
1333 |
case '>': |
|
1334 |
case '<': |
|
1335 |
case -1: |
|
1336 |
return; |
|
1337 |
||
1338 |
case '-': |
|
1339 |
if ((ch = readCh()) == '-') {
|
|
1340 |
ch = readCh(); |
|
1341 |
parseComment(); |
|
1342 |
strpos = 0; |
|
1343 |
} else {
|
|
1344 |
error("invalid.tagchar", "-", elem.getName());
|
|
1345 |
ch = readCh(); |
|
1346 |
} |
|
1347 |
continue; |
|
1348 |
} |
|
1349 |
||
|
1287
a04aca99c77a
6722802: Code improvement and warnings removing from the javax.swing.text package
rupashka
parents:
438
diff
changeset
|
1350 |
AttributeList att; |
|
a04aca99c77a
6722802: Code improvement and warnings removing from the javax.swing.text package
rupashka
parents:
438
diff
changeset
|
1351 |
String attname; |
|
a04aca99c77a
6722802: Code improvement and warnings removing from the javax.swing.text package
rupashka
parents:
438
diff
changeset
|
1352 |
String attvalue; |
| 2 | 1353 |
|
1354 |
if (parseIdentifier(true)) {
|
|
1355 |
attname = getString(0); |
|
1356 |
skipSpace(); |
|
1357 |
if (ch == '=') {
|
|
1358 |
ch = readCh(); |
|
1359 |
skipSpace(); |
|
1360 |
att = elem.getAttribute(attname); |
|
1361 |
// Bug ID 4102750 |
|
1362 |
// Load the NAME of an Attribute Case Sensitive |
|
1363 |
// The case of the NAME must be intact |
|
1364 |
// MG 021898 |
|
1365 |
attvalue = parseAttributeValue((att != null) && (att.type != CDATA) && (att.type != NOTATION) && (att.type != NAME)); |
|
1366 |
// attvalue = parseAttributeValue((att != null) && (att.type != CDATA) && (att.type != NOTATION)); |
|
1367 |
} else {
|
|
1368 |
attvalue = attname; |
|
1369 |
att = elem.getAttributeByValue(attvalue); |
|
1370 |
if (att == null) {
|
|
1371 |
att = elem.getAttribute(attname); |
|
1372 |
if (att != null) {
|
|
1373 |
attvalue = att.getValue(); |
|
1374 |
} |
|
1375 |
else {
|
|
1376 |
// Make it null so that NULL_ATTRIBUTE_VALUE is |
|
1377 |
// used |
|
1378 |
attvalue = null; |
|
1379 |
} |
|
1380 |
} |
|
1381 |
} |
|
1382 |
} else if (!strict && ch == ',') { // allows for comma separated attribute-value pairs
|
|
1383 |
ch = readCh(); |
|
1384 |
continue; |
|
1385 |
} else if (!strict && ch == '"') { // allows for quoted attributes
|
|
1386 |
ch = readCh(); |
|
1387 |
skipSpace(); |
|
1388 |
if (parseIdentifier(true)) {
|
|
1389 |
attname = getString(0); |
|
1390 |
if (ch == '"') {
|
|
1391 |
ch = readCh(); |
|
1392 |
} |
|
1393 |
skipSpace(); |
|
1394 |
if (ch == '=') {
|
|
1395 |
ch = readCh(); |
|
1396 |
skipSpace(); |
|
1397 |
att = elem.getAttribute(attname); |
|
1398 |
attvalue = parseAttributeValue((att != null) && |
|
1399 |
(att.type != CDATA) && |
|
1400 |
(att.type != NOTATION)); |
|
1401 |
} else {
|
|
1402 |
attvalue = attname; |
|
1403 |
att = elem.getAttributeByValue(attvalue); |
|
1404 |
if (att == null) {
|
|
1405 |
att = elem.getAttribute(attname); |
|
1406 |
if (att != null) {
|
|
1407 |
attvalue = att.getValue(); |
|
1408 |
} |
|
1409 |
} |
|
1410 |
} |
|
1411 |
} else {
|
|
1412 |
char str[] = {(char)ch};
|
|
1413 |
error("invalid.tagchar", new String(str), elem.getName());
|
|
1414 |
ch = readCh(); |
|
1415 |
continue; |
|
1416 |
} |
|
1417 |
} else if (!strict && (attributes.isEmpty()) && (ch == '=')) {
|
|
1418 |
ch = readCh(); |
|
1419 |
skipSpace(); |
|
1420 |
attname = elem.getName(); |
|
1421 |
att = elem.getAttribute(attname); |
|
1422 |
attvalue = parseAttributeValue((att != null) && |
|
1423 |
(att.type != CDATA) && |
|
1424 |
(att.type != NOTATION)); |
|
1425 |
} else if (!strict && (ch == '=')) {
|
|
1426 |
ch = readCh(); |
|
1427 |
skipSpace(); |
|
1428 |
attvalue = parseAttributeValue(true); |
|
1429 |
error("attvalerr");
|
|
1430 |
return; |
|
1431 |
} else {
|
|
1432 |
char str[] = {(char)ch};
|
|
1433 |
error("invalid.tagchar", new String(str), elem.getName());
|
|
1434 |
if (!strict) {
|
|
1435 |
ch = readCh(); |
|
1436 |
continue; |
|
1437 |
} else {
|
|
1438 |
return; |
|
1439 |
} |
|
1440 |
} |
|
1441 |
||
1442 |
if (att != null) {
|
|
1443 |
attname = att.getName(); |
|
1444 |
} else {
|
|
1445 |
error("invalid.tagatt", attname, elem.getName());
|
|
1446 |
} |
|
1447 |
||
1448 |
// Check out the value |
|
1449 |
if (attributes.isDefined(attname)) {
|
|
1450 |
error("multi.tagatt", attname, elem.getName());
|
|
1451 |
} |
|
1452 |
if (attvalue == null) {
|
|
1453 |
attvalue = ((att != null) && (att.value != null)) ? att.value : |
|
1454 |
HTML.NULL_ATTRIBUTE_VALUE; |
|
1455 |
} else if ((att != null) && (att.values != null) && !att.values.contains(attvalue)) {
|
|
1456 |
error("invalid.tagattval", attname, elem.getName());
|
|
1457 |
} |
|
1458 |
HTML.Attribute attkey = HTML.getAttributeKey(attname); |
|
1459 |
if (attkey == null) {
|
|
1460 |
attributes.addAttribute(attname, attvalue); |
|
1461 |
} else {
|
|
1462 |
attributes.addAttribute(attkey, attvalue); |
|
1463 |
} |
|
1464 |
} |
|
1465 |
} |
|
1466 |
||
1467 |
/** |
|
1468 |
* Parses th Document Declaration Type markup declaration. |
|
1469 |
* Currently ignores it. |
|
1470 |
*/ |
|
1471 |
public String parseDTDMarkup() throws IOException {
|
|
1472 |
||
1473 |
StringBuffer strBuff = new StringBuffer(); |
|
1474 |
ch = readCh(); |
|
1475 |
while(true) {
|
|
1476 |
switch (ch) {
|
|
1477 |
case '>': |
|
1478 |
ch = readCh(); |
|
1479 |
return strBuff.toString(); |
|
1480 |
case -1: |
|
1481 |
error("invalid.markup");
|
|
1482 |
return strBuff.toString(); |
|
1483 |
case '\n': |
|
1484 |
ln++; |
|
1485 |
ch = readCh(); |
|
1486 |
lfCount++; |
|
1487 |
break; |
|
1488 |
case '"': |
|
1489 |
ch = readCh(); |
|
1490 |
break; |
|
1491 |
case '\r': |
|
1492 |
ln++; |
|
1493 |
if ((ch = readCh()) == '\n') {
|
|
1494 |
ch = readCh(); |
|
1495 |
crlfCount++; |
|
1496 |
} |
|
1497 |
else {
|
|
1498 |
crCount++; |
|
1499 |
} |
|
1500 |
break; |
|
1501 |
default: |
|
1502 |
strBuff.append((char)(ch & 0xFF)); |
|
1503 |
ch = readCh(); |
|
1504 |
break; |
|
1505 |
} |
|
1506 |
} |
|
1507 |
} |
|
1508 |
||
1509 |
/** |
|
1510 |
* Parse markup declarations. |
|
1511 |
* Currently only handles the Document Type Declaration markup. |
|
1512 |
* Returns true if it is a markup declaration false otherwise. |
|
1513 |
*/ |
|
1514 |
protected boolean parseMarkupDeclarations(StringBuffer strBuff) throws IOException {
|
|
1515 |
||
1516 |
/* Currently handles only the DOCTYPE */ |
|
1517 |
if ((strBuff.length() == "DOCTYPE".length()) && |
|
1518 |
(strBuff.toString().toUpperCase().equals("DOCTYPE"))) {
|
|
1519 |
parseDTDMarkup(); |
|
1520 |
return true; |
|
1521 |
} |
|
1522 |
return false; |
|
1523 |
} |
|
1524 |
||
1525 |
/** |
|
1526 |
* Parse an invalid tag. |
|
1527 |
*/ |
|
1528 |
void parseInvalidTag() throws IOException {
|
|
1529 |
// ignore all data upto the close bracket '>' |
|
1530 |
while (true) {
|
|
1531 |
skipSpace(); |
|
1532 |
switch (ch) {
|
|
1533 |
case '>': |
|
1534 |
case -1: |
|
1535 |
ch = readCh(); |
|
1536 |
return; |
|
1537 |
case '<': |
|
1538 |
return; |
|
1539 |
default: |
|
1540 |
ch = readCh(); |
|
1541 |
||
1542 |
} |
|
1543 |
} |
|
1544 |
} |
|
1545 |
||
1546 |
/** |
|
1547 |
* Parse a start or end tag. |
|
1548 |
*/ |
|
1549 |
void parseTag() throws IOException {
|
|
|
1287
a04aca99c77a
6722802: Code improvement and warnings removing from the javax.swing.text package
rupashka
parents:
438
diff
changeset
|
1550 |
Element elem; |
| 2 | 1551 |
boolean net = false; |
1552 |
boolean warned = false; |
|
1553 |
boolean unknown = false; |
|
1554 |
||
1555 |
switch (ch = readCh()) {
|
|
1556 |
case '!': |
|
1557 |
switch (ch = readCh()) {
|
|
1558 |
case '-': |
|
1559 |
// Parse comment. [92] 391:7 |
|
1560 |
while (true) {
|
|
1561 |
if (ch == '-') {
|
|
1562 |
if (!strict || ((ch = readCh()) == '-')) {
|
|
1563 |
ch = readCh(); |
|
1564 |
if (!strict && ch == '-') {
|
|
1565 |
ch = readCh(); |
|
1566 |
} |
|
1567 |
// send over any text you might see |
|
1568 |
// before parsing and sending the |
|
1569 |
// comment |
|
1570 |
if (textpos != 0) {
|
|
1571 |
char newtext[] = new char[textpos]; |
|
1572 |
System.arraycopy(text, 0, newtext, 0, textpos); |
|
1573 |
handleText(newtext); |
|
1574 |
lastBlockStartPos = currentBlockStartPos; |
|
1575 |
textpos = 0; |
|
1576 |
} |
|
1577 |
parseComment(); |
|
1578 |
last = makeTag(dtd.getElement("comment"), true);
|
|
1579 |
handleComment(getChars(0)); |
|
1580 |
continue; |
|
1581 |
} else if (!warned) {
|
|
1582 |
warned = true; |
|
1583 |
error("invalid.commentchar", "-");
|
|
1584 |
} |
|
1585 |
} |
|
1586 |
skipSpace(); |
|
1587 |
switch (ch) {
|
|
1588 |
case '-': |
|
1589 |
continue; |
|
1590 |
case '>': |
|
1591 |
ch = readCh(); |
|
1592 |
case -1: |
|
1593 |
return; |
|
1594 |
default: |
|
1595 |
ch = readCh(); |
|
1596 |
if (!warned) {
|
|
1597 |
warned = true; |
|
1598 |
error("invalid.commentchar",
|
|
1599 |
String.valueOf((char)ch)); |
|
1600 |
} |
|
1601 |
break; |
|
1602 |
} |
|
1603 |
} |
|
1604 |
||
1605 |
default: |
|
1606 |
// deal with marked sections |
|
1607 |
StringBuffer strBuff = new StringBuffer(); |
|
1608 |
while (true) {
|
|
1609 |
strBuff.append((char)ch); |
|
1610 |
if (parseMarkupDeclarations(strBuff)) {
|
|
1611 |
return; |
|
1612 |
} |
|
1613 |
switch(ch) {
|
|
1614 |
case '>': |
|
1615 |
ch = readCh(); |
|
1616 |
case -1: |
|
1617 |
error("invalid.markup");
|
|
1618 |
return; |
|
1619 |
case '\n': |
|
1620 |
ln++; |
|
1621 |
ch = readCh(); |
|
1622 |
lfCount++; |
|
1623 |
break; |
|
1624 |
case '\r': |
|
1625 |
ln++; |
|
1626 |
if ((ch = readCh()) == '\n') {
|
|
1627 |
ch = readCh(); |
|
1628 |
crlfCount++; |
|
1629 |
} |
|
1630 |
else {
|
|
1631 |
crCount++; |
|
1632 |
} |
|
1633 |
break; |
|
1634 |
||
1635 |
default: |
|
1636 |
ch = readCh(); |
|
1637 |
break; |
|
1638 |
} |
|
1639 |
} |
|
1640 |
} |
|
1641 |
||
1642 |
case '/': |
|
1643 |
// parse end tag [19] 317:4 |
|
1644 |
switch (ch = readCh()) {
|
|
1645 |
case '>': |
|
1646 |
ch = readCh(); |
|
1647 |
case '<': |
|
1648 |
// empty end tag. either </> or </< |
|
1649 |
if (recent == null) {
|
|
1650 |
error("invalid.shortend");
|
|
1651 |
return; |
|
1652 |
} |
|
1653 |
elem = recent; |
|
1654 |
break; |
|
1655 |
||
1656 |
default: |
|
1657 |
if (!parseIdentifier(true)) {
|
|
1658 |
error("expected.endtagname");
|
|
1659 |
return; |
|
1660 |
} |
|
1661 |
skipSpace(); |
|
1662 |
switch (ch) {
|
|
1663 |
case '>': |
|
1664 |
ch = readCh(); |
|
1665 |
case '<': |
|
1666 |
break; |
|
1667 |
||
1668 |
default: |
|
1669 |
error("expected", "'>'");
|
|
1670 |
while ((ch != -1) && (ch != '\n') && (ch != '>')) {
|
|
1671 |
ch = readCh(); |
|
1672 |
} |
|
1673 |
if (ch == '>') {
|
|
1674 |
ch = readCh(); |
|
1675 |
} |
|
1676 |
break; |
|
1677 |
} |
|
1678 |
String elemStr = getString(0); |
|
1679 |
if (!dtd.elementExists(elemStr)) {
|
|
1680 |
error("end.unrecognized", elemStr);
|
|
1681 |
// Ignore RE before end tag |
|
1682 |
if ((textpos > 0) && (text[textpos-1] == '\n')) {
|
|
1683 |
textpos--; |
|
1684 |
} |
|
1685 |
elem = dtd.getElement("unknown");
|
|
1686 |
elem.name = elemStr; |
|
1687 |
unknown = true; |
|
1688 |
} else {
|
|
1689 |
elem = dtd.getElement(elemStr); |
|
1690 |
} |
|
1691 |
break; |
|
1692 |
} |
|
1693 |
||
1694 |
||
1695 |
// If the stack is null, we're seeing end tags without any begin |
|
1696 |
// tags. Ignore them. |
|
1697 |
||
1698 |
if (stack == null) {
|
|
1699 |
error("end.extra.tag", elem.getName());
|
|
1700 |
return; |
|
1701 |
} |
|
1702 |
||
1703 |
// Ignore RE before end tag |
|
1704 |
if ((textpos > 0) && (text[textpos-1] == '\n')) {
|
|
1705 |
// In a pre tag, if there are blank lines |
|
1706 |
// we do not want to remove the newline |
|
1707 |
// before the end tag. Hence this code. |
|
1708 |
// |
|
1709 |
if (stack.pre) {
|
|
1710 |
if ((textpos > 1) && (text[textpos-2] != '\n')) {
|
|
1711 |
textpos--; |
|
1712 |
} |
|
1713 |
} else {
|
|
1714 |
textpos--; |
|
1715 |
} |
|
1716 |
} |
|
1717 |
||
1718 |
// If the end tag is a form, since we did not put it |
|
1719 |
// on the tag stack, there is no corresponding start |
|
1720 |
// start tag to find. Hence do not touch the tag stack. |
|
1721 |
// |
|
1722 |
||
1723 |
/* |
|
1724 |
if (!strict && elem.getName().equals("form")) {
|
|
1725 |
if (lastFormSent != null) {
|
|
1726 |
handleEndTag(lastFormSent); |
|
1727 |
return; |
|
1728 |
} else {
|
|
1729 |
// do nothing. |
|
1730 |
return; |
|
1731 |
} |
|
1732 |
} |
|
1733 |
*/ |
|
1734 |
||
1735 |
if (unknown) {
|
|
1736 |
// we will not see a corresponding start tag |
|
1737 |
// on the the stack. If we are seeing an |
|
1738 |
// end tag, lets send this on as an empty |
|
1739 |
// tag with the end tag attribute set to |
|
1740 |
// true. |
|
1741 |
TagElement t = makeTag(elem); |
|
1742 |
handleText(t); |
|
1743 |
attributes.addAttribute(HTML.Attribute.ENDTAG, "true"); |
|
1744 |
handleEmptyTag(makeTag(elem)); |
|
1745 |
unknown = false; |
|
1746 |
return; |
|
1747 |
} |
|
1748 |
||
1749 |
// find the corresponding start tag |
|
1750 |
||
1751 |
// A commonly occuring error appears to be the insertion |
|
1752 |
// of extra end tags in a table. The intent here is ignore |
|
1753 |
// such extra end tags. |
|
1754 |
// |
|
1755 |
if (!strict) {
|
|
1756 |
String stackElem = stack.elem.getName(); |
|
1757 |
||
1758 |
if (stackElem.equals("table")) {
|
|
1759 |
// If it isnt a valid end tag ignore it and return |
|
1760 |
// |
|
1761 |
if (!elem.getName().equals(stackElem)) {
|
|
1762 |
error("tag.ignore", elem.getName());
|
|
1763 |
return; |
|
1764 |
} |
|
1765 |
} |
|
1766 |
||
1767 |
||
1768 |
||
1769 |
if (stackElem.equals("tr") ||
|
|
1770 |
stackElem.equals("td")) {
|
|
1771 |
if ((!elem.getName().equals("table")) &&
|
|
1772 |
(!elem.getName().equals(stackElem))) {
|
|
1773 |
error("tag.ignore", elem.getName());
|
|
1774 |
return; |
|
1775 |
} |
|
1776 |
} |
|
1777 |
} |
|
1778 |
TagStack sp = stack; |
|
1779 |
||
1780 |
while ((sp != null) && (elem != sp.elem)) {
|
|
1781 |
sp = sp.next; |
|
1782 |
} |
|
1783 |
if (sp == null) {
|
|
1784 |
error("unmatched.endtag", elem.getName());
|
|
1785 |
return; |
|
1786 |
} |
|
1787 |
||
1788 |
// People put font ending tags in the darndest places. |
|
1789 |
// Don't close other contexts based on them being between |
|
1790 |
// a font tag and the corresponding end tag. Instead, |
|
1791 |
// ignore the end tag like it doesn't exist and allow the end |
|
1792 |
// of the document to close us out. |
|
1793 |
String elemName = elem.getName(); |
|
1794 |
if (stack != sp && |
|
1795 |
(elemName.equals("font") ||
|
|
1796 |
elemName.equals("center"))) {
|
|
1797 |
||
1798 |
// Since closing out a center tag can have real wierd |
|
1799 |
// effects on the formatting, make sure that tags |
|
1800 |
// for which omitting an end tag is legimitate |
|
1801 |
// get closed out. |
|
1802 |
// |
|
1803 |
if (elemName.equals("center")) {
|
|
1804 |
while(stack.elem.omitEnd() && stack != sp) {
|
|
1805 |
endTag(true); |
|
1806 |
} |
|
1807 |
if (stack.elem == elem) {
|
|
1808 |
endTag(false); |
|
1809 |
} |
|
1810 |
} |
|
1811 |
return; |
|
1812 |
} |
|
1813 |
// People do the same thing with center tags. In this |
|
1814 |
// case we would like to close off the center tag but |
|
1815 |
// not necessarily all enclosing tags. |
|
1816 |
||
1817 |
||
1818 |
||
1819 |
// end tags |
|
1820 |
while (stack != sp) {
|
|
1821 |
endTag(true); |
|
1822 |
} |
|
1823 |
||
1824 |
endTag(false); |
|
1825 |
return; |
|
1826 |
||
1827 |
case -1: |
|
1828 |
error("eof");
|
|
1829 |
return; |
|
1830 |
} |
|
1831 |
||
1832 |
// start tag [14] 314:1 |
|
1833 |
if (!parseIdentifier(true)) {
|
|
1834 |
elem = recent; |
|
1835 |
if ((ch != '>') || (elem == null)) {
|
|
1836 |
error("expected.tagname");
|
|
1837 |
return; |
|
1838 |
} |
|
1839 |
} else {
|
|
1840 |
String elemStr = getString(0); |
|
1841 |
||
1842 |
if (elemStr.equals("image")) {
|
|
|
438
2ae294e4518c
6613529: Avoid duplicate object creation within JDK packages
dav
parents:
2
diff
changeset
|
1843 |
elemStr = "img"; |
| 2 | 1844 |
} |
1845 |
||
1846 |
/* determine if this element is part of the dtd. */ |
|
1847 |
||
1848 |
if (!dtd.elementExists(elemStr)) {
|
|
1849 |
// parseInvalidTag(); |
|
1850 |
error("tag.unrecognized ", elemStr);
|
|
1851 |
elem = dtd.getElement("unknown");
|
|
1852 |
elem.name = elemStr; |
|
1853 |
unknown = true; |
|
1854 |
} else {
|
|
1855 |
elem = dtd.getElement(elemStr); |
|
1856 |
} |
|
1857 |
} |
|
1858 |
||
1859 |
// Parse attributes |
|
1860 |
parseAttributeSpecificationList(elem); |
|
1861 |
||
1862 |
switch (ch) {
|
|
1863 |
case '/': |
|
1864 |
net = true; |
|
1865 |
case '>': |
|
1866 |
ch = readCh(); |
|
1867 |
if (ch == '>' && net) {
|
|
1868 |
ch = readCh(); |
|
1869 |
} |
|
1870 |
case '<': |
|
1871 |
break; |
|
1872 |
||
1873 |
default: |
|
1874 |
error("expected", "'>'");
|
|
1875 |
break; |
|
1876 |
} |
|
1877 |
||
1878 |
if (!strict) {
|
|
1879 |
if (elem.getName().equals("script")) {
|
|
1880 |
error("javascript.unsupported");
|
|
1881 |
} |
|
1882 |
} |
|
1883 |
||
1884 |
// ignore RE after start tag |
|
1885 |
// |
|
1886 |
if (!elem.isEmpty()) {
|
|
1887 |
if (ch == '\n') {
|
|
1888 |
ln++; |
|
1889 |
lfCount++; |
|
1890 |
ch = readCh(); |
|
1891 |
} else if (ch == '\r') {
|
|
1892 |
ln++; |
|
1893 |
if ((ch = readCh()) == '\n') {
|
|
1894 |
ch = readCh(); |
|
1895 |
crlfCount++; |
|
1896 |
} |
|
1897 |
else {
|
|
1898 |
crCount++; |
|
1899 |
} |
|
1900 |
} |
|
1901 |
} |
|
1902 |
||
1903 |
// ensure a legal context for the tag |
|
1904 |
TagElement tag = makeTag(elem, false); |
|
1905 |
||
1906 |
||
1907 |
/** In dealing with forms, we have decided to treat |
|
1908 |
them as legal in any context. Also, even though |
|
1909 |
they do have a start and an end tag, we will |
|
1910 |
not put this tag on the stack. This is to deal |
|
1911 |
several pages in the web oasis that choose to |
|
1912 |
start and end forms in any possible location. **/ |
|
1913 |
||
1914 |
/* |
|
1915 |
if (!strict && elem.getName().equals("form")) {
|
|
1916 |
if (lastFormSent == null) {
|
|
1917 |
lastFormSent = tag; |
|
1918 |
} else {
|
|
1919 |
handleEndTag(lastFormSent); |
|
1920 |
lastFormSent = tag; |
|
1921 |
} |
|
1922 |
} else {
|
|
1923 |
*/ |
|
1924 |
// Smlly, if a tag is unknown, we will apply |
|
1925 |
// no legalTagContext logic to it. |
|
1926 |
// |
|
1927 |
if (!unknown) {
|
|
1928 |
legalTagContext(tag); |
|
1929 |
||
1930 |
// If skip tag is true, this implies that |
|
1931 |
// the tag was illegal and that the error |
|
1932 |
// recovery strategy adopted is to ignore |
|
1933 |
// the tag. |
|
1934 |
if (!strict && skipTag) {
|
|
1935 |
skipTag = false; |
|
1936 |
return; |
|
1937 |
} |
|
1938 |
} |
|
1939 |
/* |
|
1940 |
} |
|
1941 |
*/ |
|
1942 |
||
1943 |
startTag(tag); |
|
1944 |
||
1945 |
if (!elem.isEmpty()) {
|
|
1946 |
switch (elem.getType()) {
|
|
1947 |
case CDATA: |
|
1948 |
parseLiteral(false); |
|
1949 |
break; |
|
1950 |
case RCDATA: |
|
1951 |
parseLiteral(true); |
|
1952 |
break; |
|
1953 |
default: |
|
1954 |
if (stack != null) {
|
|
1955 |
stack.net = net; |
|
1956 |
} |
|
1957 |
break; |
|
1958 |
} |
|
1959 |
} |
|
1960 |
} |
|
1961 |
||
1962 |
private static final String START_COMMENT = "<!--"; |
|
1963 |
private static final String END_COMMENT = "-->"; |
|
1964 |
private static final char[] SCRIPT_END_TAG = "</script>".toCharArray(); |
|
1965 |
private static final char[] SCRIPT_END_TAG_UPPER_CASE = |
|
1966 |
"</SCRIPT>".toCharArray(); |
|
1967 |
||
1968 |
void parseScript() throws IOException {
|
|
1969 |
char[] charsToAdd = new char[SCRIPT_END_TAG.length]; |
|
1970 |
||
1971 |
/* Here, ch should be the first character after <script> */ |
|
1972 |
while (true) {
|
|
1973 |
int i = 0; |
|
1974 |
while (i < SCRIPT_END_TAG.length |
|
1975 |
&& (SCRIPT_END_TAG[i] == ch |
|
1976 |
|| SCRIPT_END_TAG_UPPER_CASE[i] == ch)) {
|
|
1977 |
charsToAdd[i] = (char) ch; |
|
1978 |
ch = readCh(); |
|
1979 |
i++; |
|
1980 |
} |
|
1981 |
if (i == SCRIPT_END_TAG.length) {
|
|
1982 |
||
1983 |
/* '</script>' tag detected */ |
|
1984 |
/* Here, ch == '>' */ |
|
1985 |
ch = readCh(); |
|
1986 |
/* Here, ch == the first character after </script> */ |
|
1987 |
return; |
|
1988 |
} else {
|
|
1989 |
||
1990 |
/* To account for extra read()'s that happened */ |
|
1991 |
for (int j = 0; j < i; j++) {
|
|
1992 |
addString(charsToAdd[j]); |
|
1993 |
} |
|
1994 |
||
1995 |
switch (ch) {
|
|
1996 |
case -1: |
|
1997 |
error("eof.script");
|
|
1998 |
return; |
|
1999 |
case '\n': |
|
2000 |
ln++; |
|
2001 |
ch = readCh(); |
|
2002 |
lfCount++; |
|
2003 |
addString('\n');
|
|
2004 |
break; |
|
2005 |
case '\r': |
|
2006 |
ln++; |
|
2007 |
if ((ch = readCh()) == '\n') {
|
|
2008 |
ch = readCh(); |
|
2009 |
crlfCount++; |
|
2010 |
} else {
|
|
2011 |
crCount++; |
|
2012 |
} |
|
2013 |
addString('\n');
|
|
2014 |
break; |
|
2015 |
default: |
|
2016 |
addString(ch); |
|
2017 |
ch = readCh(); |
|
2018 |
break; |
|
2019 |
} // switch |
|
2020 |
} |
|
2021 |
} // while |
|
2022 |
} |
|
2023 |
||
2024 |
/** |
|
2025 |
* Parse Content. [24] 320:1 |
|
2026 |
*/ |
|
2027 |
void parseContent() throws IOException {
|
|
2028 |
Thread curThread = Thread.currentThread(); |
|
2029 |
||
2030 |
for (;;) {
|
|
2031 |
if (curThread.isInterrupted()) {
|
|
2032 |
curThread.interrupt(); // resignal the interrupt |
|
2033 |
break; |
|
2034 |
} |
|
2035 |
||
2036 |
int c = ch; |
|
2037 |
currentBlockStartPos = currentPosition; |
|
2038 |
||
2039 |
if (recent == dtd.script) { // means: if after starting <script> tag
|
|
2040 |
||
2041 |
/* Here, ch has to be the first character after <script> */ |
|
2042 |
parseScript(); |
|
2043 |
last = makeTag(dtd.getElement("comment"), true);
|
|
2044 |
||
2045 |
/* Remove leading and trailing HTML comment declarations */ |
|
2046 |
String str = new String(getChars(0)).trim(); |
|
2047 |
int minLength = START_COMMENT.length() + END_COMMENT.length(); |
|
2048 |
if (str.startsWith(START_COMMENT) && str.endsWith(END_COMMENT) |
|
2049 |
&& str.length() >= (minLength)) {
|
|
2050 |
str = str.substring(START_COMMENT.length(), |
|
2051 |
str.length() - END_COMMENT.length()); |
|
2052 |
} |
|
2053 |
||
2054 |
/* Handle resulting chars as comment */ |
|
2055 |
handleComment(str.toCharArray()); |
|
2056 |
endTag(false); |
|
2057 |
lastBlockStartPos = currentPosition; |
|
2058 |
} else {
|
|
2059 |
switch (c) {
|
|
2060 |
case '<': |
|
2061 |
parseTag(); |
|
2062 |
lastBlockStartPos = currentPosition; |
|
2063 |
continue; |
|
2064 |
||
2065 |
case '/': |
|
2066 |
ch = readCh(); |
|
2067 |
if ((stack != null) && stack.net) {
|
|
2068 |
// null end tag. |
|
2069 |
endTag(false); |
|
2070 |
continue; |
|
2071 |
} |
|
2072 |
break; |
|
2073 |
||
2074 |
case -1: |
|
2075 |
return; |
|
2076 |
||
2077 |
case '&': |
|
2078 |
if (textpos == 0) {
|
|
2079 |
if (!legalElementContext(dtd.pcdata)) {
|
|
2080 |
error("unexpected.pcdata");
|
|
2081 |
} |
|
2082 |
if (last.breaksFlow()) {
|
|
2083 |
space = false; |
|
2084 |
} |
|
2085 |
} |
|
2086 |
char data[] = parseEntityReference(); |
|
2087 |
if (textpos + data.length + 1 > text.length) {
|
|
2088 |
char newtext[] = new char[Math.max(textpos + data.length + 128, text.length * 2)]; |
|
2089 |
System.arraycopy(text, 0, newtext, 0, text.length); |
|
2090 |
text = newtext; |
|
2091 |
} |
|
2092 |
if (space) {
|
|
2093 |
space = false; |
|
2094 |
text[textpos++] = ' '; |
|
2095 |
} |
|
2096 |
System.arraycopy(data, 0, text, textpos, data.length); |
|
2097 |
textpos += data.length; |
|
2098 |
ignoreSpace = false; |
|
2099 |
continue; |
|
2100 |
||
2101 |
case '\n': |
|
2102 |
ln++; |
|
2103 |
lfCount++; |
|
2104 |
ch = readCh(); |
|
2105 |
if ((stack != null) && stack.pre) {
|
|
2106 |
break; |
|
2107 |
} |
|
2108 |
if (textpos == 0) {
|
|
2109 |
lastBlockStartPos = currentPosition; |
|
2110 |
} |
|
2111 |
if (!ignoreSpace) {
|
|
2112 |
space = true; |
|
2113 |
} |
|
2114 |
continue; |
|
2115 |
||
2116 |
case '\r': |
|
2117 |
ln++; |
|
2118 |
c = '\n'; |
|
2119 |
if ((ch = readCh()) == '\n') {
|
|
2120 |
ch = readCh(); |
|
2121 |
crlfCount++; |
|
2122 |
} |
|
2123 |
else {
|
|
2124 |
crCount++; |
|
2125 |
} |
|
2126 |
if ((stack != null) && stack.pre) {
|
|
2127 |
break; |
|
2128 |
} |
|
2129 |
if (textpos == 0) {
|
|
2130 |
lastBlockStartPos = currentPosition; |
|
2131 |
} |
|
2132 |
if (!ignoreSpace) {
|
|
2133 |
space = true; |
|
2134 |
} |
|
2135 |
continue; |
|
2136 |
||
2137 |
||
2138 |
case '\t': |
|
2139 |
case ' ': |
|
2140 |
ch = readCh(); |
|
2141 |
if ((stack != null) && stack.pre) {
|
|
2142 |
break; |
|
2143 |
} |
|
2144 |
if (textpos == 0) {
|
|
2145 |
lastBlockStartPos = currentPosition; |
|
2146 |
} |
|
2147 |
if (!ignoreSpace) {
|
|
2148 |
space = true; |
|
2149 |
} |
|
2150 |
continue; |
|
2151 |
||
2152 |
default: |
|
2153 |
if (textpos == 0) {
|
|
2154 |
if (!legalElementContext(dtd.pcdata)) {
|
|
2155 |
error("unexpected.pcdata");
|
|
2156 |
} |
|
2157 |
if (last.breaksFlow()) {
|
|
2158 |
space = false; |
|
2159 |
} |
|
2160 |
} |
|
2161 |
ch = readCh(); |
|
2162 |
break; |
|
2163 |
} |
|
2164 |
} |
|
2165 |
||
2166 |
// enlarge buffer if needed |
|
2167 |
if (textpos + 2 > text.length) {
|
|
2168 |
char newtext[] = new char[text.length + 128]; |
|
2169 |
System.arraycopy(text, 0, newtext, 0, text.length); |
|
2170 |
text = newtext; |
|
2171 |
} |
|
2172 |
||
2173 |
// output pending space |
|
2174 |
if (space) {
|
|
2175 |
if (textpos == 0) {
|
|
2176 |
lastBlockStartPos--; |
|
2177 |
} |
|
2178 |
text[textpos++] = ' '; |
|
2179 |
space = false; |
|
2180 |
} |
|
2181 |
text[textpos++] = (char)c; |
|
2182 |
ignoreSpace = false; |
|
2183 |
} |
|
2184 |
} |
|
2185 |
||
2186 |
/** |
|
2187 |
* Returns the end of line string. This will return the end of line |
|
2188 |
* string that has been encountered the most, one of \r, \n or \r\n. |
|
2189 |
*/ |
|
2190 |
String getEndOfLineString() {
|
|
2191 |
if (crlfCount >= crCount) {
|
|
2192 |
if (lfCount >= crlfCount) {
|
|
2193 |
return "\n"; |
|
2194 |
} |
|
2195 |
else {
|
|
2196 |
return "\r\n"; |
|
2197 |
} |
|
2198 |
} |
|
2199 |
else {
|
|
2200 |
if (crCount > lfCount) {
|
|
2201 |
return "\r"; |
|
2202 |
} |
|
2203 |
else {
|
|
2204 |
return "\n"; |
|
2205 |
} |
|
2206 |
} |
|
2207 |
} |
|
2208 |
||
2209 |
/** |
|
2210 |
* Parse an HTML stream, given a DTD. |
|
2211 |
*/ |
|
2212 |
public synchronized void parse(Reader in) throws IOException {
|
|
2213 |
this.in = in; |
|
2214 |
||
2215 |
this.ln = 1; |
|
2216 |
||
2217 |
seenHtml = false; |
|
2218 |
seenHead = false; |
|
2219 |
seenBody = false; |
|
2220 |
||
2221 |
crCount = lfCount = crlfCount = 0; |
|
2222 |
||
2223 |
try {
|
|
2224 |
ch = readCh(); |
|
2225 |
text = new char[1024]; |
|
2226 |
str = new char[128]; |
|
2227 |
||
2228 |
parseContent(); |
|
2229 |
// NOTE: interruption may have occurred. Control flows out |
|
2230 |
// of here normally. |
|
2231 |
while (stack != null) {
|
|
2232 |
endTag(true); |
|
2233 |
} |
|
2234 |
in.close(); |
|
2235 |
} catch (IOException e) {
|
|
2236 |
errorContext(); |
|
2237 |
error("ioexception");
|
|
2238 |
throw e; |
|
2239 |
} catch (Exception e) {
|
|
2240 |
errorContext(); |
|
2241 |
error("exception", e.getClass().getName(), e.getMessage());
|
|
2242 |
e.printStackTrace(); |
|
2243 |
} catch (ThreadDeath e) {
|
|
2244 |
errorContext(); |
|
2245 |
error("terminated");
|
|
2246 |
e.printStackTrace(); |
|
2247 |
throw e; |
|
2248 |
} finally {
|
|
2249 |
for (; stack != null ; stack = stack.next) {
|
|
2250 |
handleEndTag(stack.tag); |
|
2251 |
} |
|
2252 |
||
2253 |
text = null; |
|
2254 |
str = null; |
|
2255 |
} |
|
2256 |
||
2257 |
} |
|
2258 |
||
2259 |
||
2260 |
/* |
|
2261 |
* Input cache. This is much faster than calling down to a synchronized |
|
2262 |
* method of BufferedReader for each byte. Measurements done 5/30/97 |
|
2263 |
* show that there's no point in having a bigger buffer: Increasing |
|
2264 |
* the buffer to 8192 had no measurable impact for a program discarding |
|
2265 |
* one character at a time (reading from an http URL to a local machine). |
|
2266 |
* NOTE: If the current encoding is bogus, and we read too much |
|
2267 |
* (past the content-type) we may suffer a MalformedInputException. For |
|
2268 |
* this reason the initial size is 1 and when the body is encountered the |
|
2269 |
* size is adjusted to 256. |
|
2270 |
*/ |
|
2271 |
private char buf[] = new char[1]; |
|
2272 |
private int pos; |
|
2273 |
private int len; |
|
2274 |
/* |
|
2275 |
tracks position relative to the beginning of the |
|
2276 |
document. |
|
2277 |
*/ |
|
2278 |
private int currentPosition; |
|
2279 |
||
2280 |
||
2281 |
private final int readCh() throws IOException {
|
|
2282 |
||
2283 |
if (pos >= len) {
|
|
2284 |
||
2285 |
// This loop allows us to ignore interrupts if the flag |
|
2286 |
// says so |
|
2287 |
for (;;) {
|
|
2288 |
try {
|
|
2289 |
len = in.read(buf); |
|
2290 |
break; |
|
2291 |
} catch (InterruptedIOException ex) {
|
|
2292 |
throw ex; |
|
2293 |
} |
|
2294 |
} |
|
2295 |
||
2296 |
if (len <= 0) {
|
|
2297 |
return -1; // eof |
|
2298 |
} |
|
2299 |
pos = 0; |
|
2300 |
} |
|
2301 |
++currentPosition; |
|
2302 |
||
2303 |
return buf[pos++]; |
|
2304 |
} |
|
2305 |
||
2306 |
||
2307 |
protected int getCurrentPos() {
|
|
2308 |
return currentPosition; |
|
2309 |
} |
|
2310 |
} |