JDK14/Java14源码在线阅读
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
package javax.swing.text.html;
import java.io.*;
import java.util.Hashtable;
import javax.swing.text.AttributeSet;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyleContext;
/**
* Constants used in the <code>HTMLDocument</code>. These
* are basically tag and attribute definitions.
*
* @author Timothy Prinzing
* @author Sunita Mani
*
*/
public class HTML {
/**
* Typesafe enumeration for an HTML tag. Although the
* set of HTML tags is a closed set, we have left the
* set open so that people can add their own tag types
* to their custom parser and still communicate to the
* reader.
*/
public static class Tag {
/** @since 1.3 */
public Tag() {}
/**
* Creates a new <code>Tag</code> with the specified <code>id</code>,
* and with <code>causesBreak</code> and <code>isBlock</code>
* set to <code>false</code>.
*
* @param id the id of the new tag
*/
protected Tag(String id) {
this(id, false, false);
}
/**
* Creates a new <code>Tag</code> with the specified <code>id</code>;
* <code>causesBreak</code> and <code>isBlock</code> are defined
* by the user.
*
* @param id the id of the new tag
* @param causesBreak <code>true</code> if this tag
* causes a break to the flow of data
* @param isBlock <code>true</code> if the tag is used
* to add structure to a document
*/
protected Tag(String id, boolean causesBreak, boolean isBlock) {
name = id;
this.breakTag = causesBreak;
this.blockTag = isBlock;
}
/**
* Returns <code>true</code> if this tag is a block
* tag, which is a tag used to add structure to a
* document.
*
* @return <code>true</code> if this tag is a block
* tag, otherwise returns <code>false</code>
*/
public boolean isBlock() {
return blockTag;
}
/**
* Returns <code>true</code> if this tag causes a
* line break to the flow of data, otherwise returns
* <code>false</code>.
*
* @return <code>true</code> if this tag causes a
* line break to the flow of data, otherwise returns
* <code>false</code>
*/
public boolean breaksFlow() {
return breakTag;
}
/**
* Returns <code>true</code> if this tag is pre-formatted,
* which is true if the tag is either <code>PRE</code> or
* <code>TEXTAREA</code>.
*
* @return <code>true</code> if this tag is pre-formatted,
* otherwise returns <code>false</code>
*/
public boolean isPreformatted() {
return (this == PRE || this == TEXTAREA);
}
/**
* Returns the string representation of the
* tag.
*
* @return the <code>String</code> representation of the tag
*/
public String toString() {
return name;
}
/**
* Returns <code>true</code> if this tag is considered to be a paragraph
* in the internal HTML model. <code>false</code> - otherwise.
*
* @return <code>true</code> if this tag is considered to be a paragraph
* in the internal HTML model. <code>false</code> - otherwise.
* @see HTMLDocument.HTMLReader.ParagraphAction
*/
boolean isParagraph() {
return (
this == P
|| this == IMPLIED
|| this == DT
|| this == H1
|| this == H2
|| this == H3
|| this == H4
|| this == H5
|| this == H6
);
}
boolean blockTag;
boolean breakTag;
String name;
boolean unknown;
// --- Tag Names -----------------------------------
/**
* Tag <a>
*/
public static final Tag A = new Tag("a");
/**
* Tag <address>
*/
public static final Tag ADDRESS = new Tag("address");
/**
* Tag <applet>
*/
public static final Tag APPLET = new Tag("applet");
/**
* Tag <area>
*/
public static final Tag AREA = new Tag("area");
/**
* Tag <b>
*/
public static final Tag B = new Tag("b");
/**
* Tag <base>
*/
public static final Tag BASE = new Tag("base");
/**
* Tag <basefont>
*/
public static final Tag BASEFONT = new Tag("basefont");
/**
* Tag <big>
*/
public static final Tag BIG = new Tag("big");
/**
* Tag <blockquote>
*/
public static final Tag BLOCKQUOTE = new Tag("blockquote", true, true);
/**
* Tag <body>
*/
public static final Tag BODY = new Tag("body", true, true);
/**
* Tag <br>
*/
public static final Tag BR = new Tag("br", true, false);
/**
* Tag <caption>
*/
public static final Tag CAPTION = new Tag("caption");
/**
* Tag <center>
*/
public static final Tag CENTER = new Tag("center", true, false);
/**
* Tag <cite>
*/
public static final Tag CITE = new Tag("cite");
/**
* Tag <code>
*/
public static final Tag CODE = new Tag("code");
/**
* Tag <dd>
*/
public static final Tag DD = new Tag("dd", true, true);
/**
* Tag <dfn>
*/
public static final Tag DFN = new Tag("dfn");
/**
* Tag <dir>
*/
public static final Tag DIR = new Tag("dir", true, true);
/**
* Tag <div>
*/
public static final Tag DIV = new Tag("div", true, true);
/**
* Tag <dl>
*/
public static final Tag DL = new Tag("dl", true, true);
/**
* Tag <dt>
*/
public static final Tag DT = new Tag("dt", true, true);
/**
* Tag <em>
*/
public static final Tag EM = new Tag("em");
/**
* Tag <font>
*/
public static final Tag FONT = new Tag("font");
/**
* Tag <form>
*/
public static final Tag FORM = new Tag("form", true, false);
/**
* Tag <frame>
*/
public static final Tag FRAME = new Tag("frame");
/**
* Tag <frameset>
*/
public static final Tag FRAMESET = new Tag("frameset");
/**
* Tag <h1>
*/
public static final Tag H1 = new Tag("h1", true, true);
/**
* Tag <h2>
*/
public static final Tag H2 = new Tag("h2", true, true);
/**
* Tag <h3>
*/
public static final Tag H3 = new Tag("h3", true, true);
/**
* Tag <h4>
*/
public static final Tag H4 = new Tag("h4", true, true);
/**
* Tag <h5>
*/
public static final Tag H5 = new Tag("h5", true, true);
/**
* Tag <h6>
*/
public static final Tag H6 = new Tag("h6", true, true);
/**
* Tag <head>
*/
public static final Tag HEAD = new Tag("head", true, true);
/**
* Tag <hr>
*/
public static final Tag HR = new Tag("hr", true, false);
/**
* Tag <html>
*/
public static final Tag HTML = new Tag("html", true, false);
/**
* Tag <i>
*/
public static final Tag I = new Tag("i");
/**
* Tag <img>
*/
public static final Tag IMG = new Tag("img");
/**
* Tag <input>
*/
public static final Tag INPUT = new Tag("input");
/**
* Tag <isindex>
*/
public static final Tag ISINDEX = new Tag("isindex", true, false);
/**
* Tag <kbd>
*/
public static final Tag KBD = new Tag("kbd");
/**
* Tag <li>
*/
public static final Tag LI = new Tag("li", true, true);
/**
* Tag <link>
*/
public static final Tag LINK = new Tag("link");
/**
* Tag <map>
*/
public static final Tag MAP = new Tag("map");
/**
* Tag <menu>
*/
public static final Tag MENU = new Tag("menu", true, true);
/**
* Tag <meta>
*/
public static final Tag META = new Tag("meta");
/*public*/ static final Tag NOBR = new Tag("nobr");
/**
* Tag <noframes>
*/
public static final Tag NOFRAMES = new Tag("noframes", true, true);
/**
* Tag <object>
*/
public static final Tag OBJECT = new Tag("object");
/**
* Tag <ol>
*/
public static final Tag OL = new Tag("ol", true, true);
/**
* Tag <option>
*/
public static final Tag OPTION = new Tag("option");
/**
* Tag <p>
*/
public static final Tag P = new Tag("p", true, true);
/**
* Tag <param>
*/
public static final Tag PARAM = new Tag("param");
/**
* Tag <pre>
*/
public static final Tag PRE = new Tag("pre", true, true);
/**
* Tag <samp>
*/
public static final Tag SAMP = new Tag("samp");
/**
* Tag <script>
*/
public static final Tag SCRIPT = new Tag("script");
/**
* Tag <select>
*/
public static final Tag SELECT = new Tag("select");
/**
* Tag <small>
*/
public static final Tag SMALL = new Tag("small");
/**
* Tag <span>
*/
public static final Tag SPAN = new Tag("span");
/**
* Tag <strike>
*/
public static final Tag STRIKE = new Tag("strike");
/**
* Tag <s>
*/
public static final Tag S = new Tag("s");
/**
* Tag <strong>
*/
public static final Tag STRONG = new Tag("strong");
/**
* Tag <style>
*/
public static final Tag STYLE = new Tag("style");
/**
* Tag <sub>
*/
public static final Tag SUB = new Tag("sub");
/**
* Tag <sup>
*/
public static final Tag SUP = new Tag("sup");
/**
* Tag <table>
*/
public static final Tag TABLE = new Tag("table", false, true);
/**
* Tag <td>
*/
public static final Tag TD = new Tag("td", true, true);
/**
* Tag <textarea>
*/
public static final Tag TEXTAREA = new Tag("textarea");
/**
* Tag <th>
*/
public static final Tag TH = new Tag("th", true, true);
/**
* Tag <title>
*/
public static final Tag TITLE = new Tag("title", true, true);
/**
* Tag <tr>
*/
public static final Tag TR = new Tag("tr", false, true);
/**
* Tag <tt>
*/
public static final Tag TT = new Tag("tt");
/**
* Tag <u>
*/
public static final Tag U = new Tag("u");
/**
* Tag <ul>
*/
public static final Tag UL = new Tag("ul", true, true);
/**
* Tag <var>
*/
public static final Tag VAR = new Tag("var");
/**
* All text content must be in a paragraph element.
* If a paragraph didn't exist when content was
* encountered, a paragraph is manufactured.
* <p>
* This is a tag synthesized by the HTML reader.
* Since elements are identified by their tag type,
* we create a some fake tag types to mark the elements
* that were manufactured.
*/
public static final Tag IMPLIED = new Tag("p-implied");
/**
* All text content is labeled with this tag.
* <p>
* This is a tag synthesized by the HTML reader.
* Since elements are identified by their tag type,
* we create a some fake tag types to mark the elements
* that were manufactured.
*/
public static final Tag CONTENT = new Tag("content");
/**
* All comments are labeled with this tag.
* <p>
* This is a tag synthesized by the HTML reader.
* Since elements are identified by their tag type,
* we create a some fake tag types to mark the elements
* that were manufactured.
*/
public static final Tag COMMENT = new Tag("comment");
static final Tag[] allTags = {
A, ADDRESS, APPLET, AREA, B, BASE, BASEFONT, BIG,
BLOCKQUOTE, BODY, BR, CAPTION, CENTER, CITE, CODE,
DD, DFN, DIR, DIV, DL, DT, EM, FONT, FORM, FRAME,
FRAMESET, H1, H2, H3, H4, H5, H6, HEAD, HR, HTML,
I, IMG, INPUT, ISINDEX, KBD, LI, LINK, MAP, MENU,
META, NOBR, NOFRAMES, OBJECT, OL, OPTION, P, PARAM,
PRE, SAMP, SCRIPT, SELECT, SMALL, SPAN, STRIKE, S,
STRONG, STYLE, SUB, SUP, TABLE, TD, TEXTAREA,
TH, TITLE, TR, TT, U, UL, VAR
};
static {
// Force HTMLs static initialize to be loaded.
getTag("html");
}
}
/**
* Class represents unknown HTML tag.
*/
// There is no unique instance of UnknownTag, so we allow it to be
// Serializable.
@SuppressWarnings("serial") // Same-version serialization only
public static class UnknownTag extends Tag implements Serializable {
/**
* Creates a new <code>UnknownTag</code> with the specified
* <code>id</code>.
* @param id the id of the new tag
*/
public UnknownTag(String id) {
super(id);
}
/**
* Returns the hash code which corresponds to the string
* for this tag.
*/
public int hashCode() {
return toString().hashCode();
}
/**
* Compares this object to the specified object.
* The result is <code>true</code> if and only if the argument is not
* <code>null</code> and is an <code>UnknownTag</code> object
* with the same name.
*
* @param obj the object to compare this tag with
* @return <code>true</code> if the objects are equal;
* <code>false</code> otherwise
*/
public boolean equals(Object obj) {
if (obj instanceof UnknownTag) {
return toString().equals(obj.toString());
}
return false;
}
private void writeObject(java.io.ObjectOutputStream s)
throws IOException {
s.defaultWriteObject();
s.writeBoolean(blockTag);
s.writeBoolean(breakTag);
s.writeBoolean(unknown);
s.writeObject(name);
}
private void readObject(ObjectInputStream s)
throws ClassNotFoundException, IOException {
s.defaultReadObject();
blockTag = s.readBoolean();
breakTag = s.readBoolean();
unknown = s.readBoolean();
name = (String)s.readObject();
}
}
/**
* Typesafe enumeration representing an HTML
* attribute.
*/
public static final class Attribute {
/**
* Creates a new <code>Attribute</code> with the specified
* <code>id</code>.
*
* @param id the id of the new <code>Attribute</code>
*/
Attribute(String id) {
name = id;
}
/**
* Returns the string representation of this attribute.
* @return the string representation of this attribute
*/
public String toString() {
return name;
}
private String name;
/**
* Attribute "size"
*/
public static final Attribute SIZE = new Attribute("size");
/**
* Attribute "color"
*/
public static final Attribute COLOR = new Attribute("color");
/**
* Attribute "clear"
*/
public static final Attribute CLEAR = new Attribute("clear");
/**
* Attribute "background"
*/
public static final Attribute BACKGROUND = new Attribute("background");
/**
* Attribute "bgcolor"
*/
public static final Attribute BGCOLOR = new Attribute("bgcolor");
/**
* Attribute "text"
*/
public static final Attribute TEXT = new Attribute("text");
/**
* Attribute "link"
*/
public static final Attribute LINK = new Attribute("link");
/**
* Attribute "vlink"
*/
public static final Attribute VLINK = new Attribute("vlink");
/**
* Attribute "alink"
*/
public static final Attribute ALINK = new Attribute("alink");
/**
* Attribute "width"
*/
public static final Attribute WIDTH = new Attribute("width");
/**
* Attribute "height"
*/
public static final Attribute HEIGHT = new Attribute("height");
/**
* Attribute "align"
*/
public static final Attribute ALIGN = new Attribute("align");
/**
* Attribute "name"
*/
public static final Attribute NAME = new Attribute("name");
/**
* Attribute "href"
*/
public static final Attribute HREF = new Attribute("href");
/**
* Attribute "rel"
*/
public static final Attribute REL = new Attribute("rel");
/**
* Attribute "rev"
*/
public static final Attribute REV = new Attribute("rev");
/**
* Attribute "title"
*/
public static final Attribute TITLE = new Attribute("title");
/**
* Attribute "target"
*/
public static final Attribute TARGET = new Attribute("target");
/**
* Attribute "shape"
*/
public static final Attribute SHAPE = new Attribute("shape");
/**
* Attribute "coords"
*/
public static final Attribute COORDS = new Attribute("coords");
/**
* Attribute "ismap"
*/
public static final Attribute ISMAP = new Attribute("ismap");
/**
* Attribute "nohref"
*/
public static final Attribute NOHREF = new Attribute("nohref");
/**
* Attribute "alt"
*/
public static final Attribute ALT = new Attribute("alt");
/**
* Attribute "id"
*/
public static final Attribute ID = new Attribute("id");
/**
* Attribute "src"
*/
public static final Attribute SRC = new Attribute("src");
/**
* Attribute "hspace"
*/
public static final Attribute HSPACE = new Attribute("hspace");
/**
* Attribute "vspace"
*/
public static final Attribute VSPACE = new Attribute("vspace");
/**
* Attribute "usemap"
*/
public static final Attribute USEMAP = new Attribute("usemap");
/**
* Attribute "lowsrc"
*/
public static final Attribute LOWSRC = new Attribute("lowsrc");
/**
* Attribute "codebase"
*/
public static final Attribute CODEBASE = new Attribute("codebase");
/**
* Attribute "code"
*/
public static final Attribute CODE = new Attribute("code");
/**
* Attribute "archive"
*/
public static final Attribute ARCHIVE = new Attribute("archive");
/**
* Attribute "value"
*/
public static final Attribute VALUE = new Attribute("value");
/**
* Attribute "valuetype"
*/
public static final Attribute VALUETYPE = new Attribute("valuetype");
/**
* Attribute "type"
*/
public static final Attribute TYPE = new Attribute("type");
/**
* Attribute "class"
*/
public static final Attribute CLASS = new Attribute("class");
/**
* Attribute "style"
*/
public static final Attribute STYLE = new Attribute("style");
/**
* Attribute "lang"
*/
public static final Attribute LANG = new Attribute("lang");
/**
* Attribute "face"
*/
public static final Attribute FACE = new Attribute("face");
/**
* Attribute "dir"
*/
public static final Attribute DIR = new Attribute("dir");
/**
* Attribute "declare"
*/
public static final Attribute DECLARE = new Attribute("declare");
/**
* Attribute "classid"
*/
public static final Attribute CLASSID = new Attribute("classid");
/**
* Attribute "data"
*/
public static final Attribute DATA = new Attribute("data");
/**
* Attribute "codetype"
*/
public static final Attribute CODETYPE = new Attribute("codetype");
/**
* Attribute "standby"
*/
public static final Attribute STANDBY = new Attribute("standby");
/**
* Attribute "border"
*/
public static final Attribute BORDER = new Attribute("border");
/**
* Attribute "shapes"
*/
public static final Attribute SHAPES = new Attribute("shapes");
/**
* Attribute "noshade"
*/
public static final Attribute NOSHADE = new Attribute("noshade");
/**
* Attribute "compact"
*/
public static final Attribute COMPACT = new Attribute("compact");
/**
* Attribute "start"
*/
public static final Attribute START = new Attribute("start");
/**
* Attribute "action"
*/
public static final Attribute ACTION = new Attribute("action");
/**
* Attribute "method"
*/
public static final Attribute METHOD = new Attribute("method");
/**
* Attribute "enctype"
*/
public static final Attribute ENCTYPE = new Attribute("enctype");
/**
* Attribute "checked"
*/
public static final Attribute CHECKED = new Attribute("checked");
/**
* Attribute "maxlength"
*/
public static final Attribute MAXLENGTH = new Attribute("maxlength");
/**
* Attribute "multiple"
*/
public static final Attribute MULTIPLE = new Attribute("multiple");
/**
* Attribute "selected"
*/
public static final Attribute SELECTED = new Attribute("selected");
/**
* Attribute "rows"
*/
public static final Attribute ROWS = new Attribute("rows");
/**
* Attribute "cols"
*/
public static final Attribute COLS = new Attribute("cols");
/**
* Attribute "dummy"
*/
public static final Attribute DUMMY = new Attribute("dummy");
/**
* Attribute "cellspacing"
*/
public static final Attribute CELLSPACING = new Attribute("cellspacing");
/**
* Attribute "cellpadding"
*/
public static final Attribute CELLPADDING = new Attribute("cellpadding");
/**
* Attribute "valign"
*/
public static final Attribute VALIGN = new Attribute("valign");
/**
* Attribute "halign"
*/
public static final Attribute HALIGN = new Attribute("halign");
/**
* Attribute "nowrap"
*/
public static final Attribute NOWRAP = new Attribute("nowrap");
/**
* Attribute "rowspan"
*/
public static final Attribute ROWSPAN = new Attribute("rowspan");
/**
* Attribute "colspan"
*/
public static final Attribute COLSPAN = new Attribute("colspan");
/**
* Attribute "prompt"
*/
public static final Attribute PROMPT = new Attribute("prompt");
/**
* Attribute "http-equiv"
*/
public static final Attribute HTTPEQUIV = new Attribute("http-equiv");
/**
* Attribute "content"
*/
public static final Attribute CONTENT = new Attribute("content");
/**
* Attribute "language"
*/
public static final Attribute LANGUAGE = new Attribute("language");
/**
* Attribute "version"
*/
public static final Attribute VERSION = new Attribute("version");
/**
* Attribute "n"
*/
public static final Attribute N = new Attribute("n");
/**
* Attribute "frameborder"
*/
public static final Attribute FRAMEBORDER = new Attribute("frameborder");
/**
* Attribute "marginwidth"
*/
public static final Attribute MARGINWIDTH = new Attribute("marginwidth");
/**
* Attribute "marginheight"
*/
public static final Attribute MARGINHEIGHT = new Attribute("marginheight");
/**
* Attribute "scrolling"
*/
public static final Attribute SCROLLING = new Attribute("scrolling");
/**
* Attribute "noresize"
*/
public static final Attribute NORESIZE = new Attribute("noresize");
/**
* Attribute "endtag"
*/
public static final Attribute ENDTAG = new Attribute("endtag");
/**
* Attribute "comment"
*/
public static final Attribute COMMENT = new Attribute("comment");
static final Attribute MEDIA = new Attribute("media");
static final Attribute[] allAttributes = {
FACE,
COMMENT,
SIZE,
COLOR,
CLEAR,
BACKGROUND,
BGCOLOR,
TEXT,
LINK,
VLINK,
ALINK,
WIDTH,
HEIGHT,
ALIGN,
NAME,
HREF,
REL,
REV,
TITLE,
TARGET,
SHAPE,
COORDS,
ISMAP,
NOHREF,
ALT,
ID,
SRC,
HSPACE,
VSPACE,
USEMAP,
LOWSRC,
CODEBASE,
CODE,
ARCHIVE,
VALUE,
VALUETYPE,
TYPE,
CLASS,
STYLE,
LANG,
DIR,
DECLARE,
CLASSID,
DATA,
CODETYPE,
STANDBY,
BORDER,
SHAPES,
NOSHADE,
COMPACT,
START,
ACTION,
METHOD,
ENCTYPE,
CHECKED,
MAXLENGTH,
MULTIPLE,
SELECTED,
ROWS,
COLS,
DUMMY,
CELLSPACING,
CELLPADDING,
VALIGN,
HALIGN,
NOWRAP,
ROWSPAN,
COLSPAN,
PROMPT,
HTTPEQUIV,
CONTENT,
LANGUAGE,
VERSION,
N,
FRAMEBORDER,
MARGINWIDTH,
MARGINHEIGHT,
SCROLLING,
NORESIZE,
MEDIA,
ENDTAG
};
}
// The secret to 73, is that, given that the Hashtable contents
// never change once the static initialization happens, the initial size
// that the hashtable grew to was determined, and then that very size
// is used.
//
private static final Hashtable<String, Tag> tagHashtable = new Hashtable<String, Tag>(73);
/** Maps from StyleConstant key to HTML.Tag. */
private static final Hashtable<Object, Tag> scMapping = new Hashtable<Object, Tag>(8);
static {
for (int i = 0; i < Tag.allTags.length; i++ ) {
tagHashtable.put(Tag.allTags[i].toString(), Tag.allTags[i]);
StyleContext.registerStaticAttributeKey(Tag.allTags[i]);
}
StyleContext.registerStaticAttributeKey(Tag.IMPLIED);
StyleContext.registerStaticAttributeKey(Tag.CONTENT);
StyleContext.registerStaticAttributeKey(Tag.COMMENT);
for (int i = 0; i < Attribute.allAttributes.length; i++) {
StyleContext.registerStaticAttributeKey(Attribute.
allAttributes[i]);
}
StyleContext.registerStaticAttributeKey(HTML.NULL_ATTRIBUTE_VALUE);
scMapping.put(StyleConstants.Bold, Tag.B);
scMapping.put(StyleConstants.Italic, Tag.I);
scMapping.put(StyleConstants.Underline, Tag.U);
scMapping.put(StyleConstants.StrikeThrough, Tag.STRIKE);
scMapping.put(StyleConstants.Superscript, Tag.SUP);
scMapping.put(StyleConstants.Subscript, Tag.SUB);
scMapping.put(StyleConstants.FontFamily, Tag.FONT);
scMapping.put(StyleConstants.FontSize, Tag.FONT);
}
/**
* Returns the set of actual HTML tags that
* are recognized by the default HTML reader.
* This set does not include tags that are
* manufactured by the reader.
*
* @return the set of actual HTML tags that
* are recognized by the default HTML reader
*/
public static Tag[] getAllTags() {
Tag[] tags = new Tag[Tag.allTags.length];
System.arraycopy(Tag.allTags, 0, tags, 0, Tag.allTags.length);
return tags;
}
/**
* Fetches a tag constant for a well-known tag name (i.e. one of
* the tags in the set {A, ADDRESS, APPLET, AREA, B,
* BASE, BASEFONT, BIG,
* BLOCKQUOTE, BODY, BR, CAPTION, CENTER, CITE, CODE,
* DD, DFN, DIR, DIV, DL, DT, EM, FONT, FORM, FRAME,
* FRAMESET, H1, H2, H3, H4, H5, H6, HEAD, HR, HTML,
* I, IMG, INPUT, ISINDEX, KBD, LI, LINK, MAP, MENU,
* META, NOBR, NOFRAMES, OBJECT, OL, OPTION, P, PARAM,
* PRE, SAMP, SCRIPT, SELECT, SMALL, SPAN, STRIKE, S,
* STRONG, STYLE, SUB, SUP, TABLE, TD, TEXTAREA,
* TH, TITLE, TR, TT, U, UL, VAR}. If the given
* name does not represent one of the well-known tags, then
* <code>null</code> will be returned.
*
* @param tagName the <code>String</code> name requested
* @return a tag constant corresponding to the <code>tagName</code>,
* or <code>null</code> if not found
*/
public static Tag getTag(String tagName) {
Tag t = tagHashtable.get(tagName);
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