whatpm/Whatpm/HTML.html

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<title>Whatpm::HTML - An HTML Parser</title>
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<ul>

        <li><a href="#name">NAME</a></li>
        <li><a href="#synopsis">SYNOPSIS</a></li>
        <li><a href="#description">DESCRIPTION</a></li>
        <li><a href="#methods">METHODS</a></li>
        <li><a href="#to_do">TO DO</a></li>
        <li><a href="#see_also">SEE ALSO</a></li>
        <li><a href="#author">AUTHOR</a></li>
        <li><a href="#license">LICENSE</a></li>
</ul>
<!-- INDEX END -->

<hr />
<p>
</p>
<h1><a name="name">NAME</a></h1>
<p>Whatpm::HTML - An HTML Parser</p>
<p>
</p>
<hr />
<h1><a name="synopsis">SYNOPSIS</a></h1>
<pre>
  use Whatpm::HTML;
  
  my $s = q&lt;&lt;!DOCTYPE html&gt;&lt;html&gt;...&lt;/html&gt;&gt;;
  # $doc = an empty DOM |Document| object
  my $on_error = sub {
    my $error_code = shift;
    warn $error_code, &quot;\n&quot;;
  };
  
  Whatpm::HTML-&gt;parse_string ($s =&gt; $doc, $onerror);
  
  ## Then, |$doc| is the DOM representation of |$s|.</pre>
<p>
</p>
<hr />
<h1><a name="description">DESCRIPTION</a></h1>
<p>The <code>Whatpm::HTML</code> module contains HTML parser and serializer.</p>
<p>The HTML parser can be used to construct the DOM tree representation
from an HTML document.  The parsing and tree construction are done 
as described in the Web Application 1.0 specification.</p>
<p>The HTML serializer can be used to obtain the HTML document representation
of a DOM tree (or a tree fragment thereof).  The serialization
is performed as described in the Web Applications 1.0 specification
for <code>innerHTML</code> DOM attribute.</p>
<p>This module is part of Whatpm - Perl Modules for 
Web Hypertext Application Technologies.</p>
<p>
</p>
<hr />
<h1><a name="methods">METHODS</a></h1>
<dl>
<dt><strong><a name="item_parse_string">[<em>$doc</em> =] Whatpm::HTML-&gt;parse_string (<em>$s</em>, <em>$doc</em>[, <em>$onerror</em>]);</a></strong><br />
</dt>
<dd>
Parse a string <em>$s</em> as an HTML document.
</dd>
<dd>
<p>The first argument, <em>$s</em>, MUST be a string.  It is parsed
as a sequence of characters representing an HTML document.</p>
</dd>
<dd>
<p>The second argument, <em>$doc</em>, MUST be an empty read-write 
DOM <code>Document</code> object.  The HTML DOM tree is constructed
onto this <code>Document</code> object.</p>
</dd>
<dd>
<p>The third argument, <em>$onerror</em>, MUST be a reference to
the error handler code.  Whenever a parse error is detected,
this code is invoked with an argument that contains a
useless string that might describe what is wrong.
The code MAY throw an exception, so that whole the parsing
process aborts.  Otherwise, the parser will continue to
process the input.  The code MUST NOT modify <em>$s</em> or <em>$doc</em>.
If it does, then the result is undefined.
This argument is optional; if missing, any
parse error makes that string being <code>warn</code>ed.</p>
</dd>
<dd>
<p><strong>NOTE</strong>: To be a conforming user agent, the code MUST either
abort the processing by throwing an exception at the first
invocation or MUST continue the processing until the parser
stops.</p>
</dd>
<dd>
<p>The method returns the DOM <code>Document</code> object (i.e. the second argument).</p>
</dd>
<dd>
<p>Note that the <code>Whatpm::NanoDOM</code> module provides a non-conforming
implementation of DOM that only implements a subset that
is necessary for the purpose of <code>Whatpm::HTML</code>'s parsing and
serializing.
With this module, creating a new HTML <code>Document</code> object
from a string containing HTML document might be coded as:</p>
</dd>
<dd>
<pre>
  use Whatpm::HTML;
  use Whatpm::NanoDOM;
  my $doc = Whatpm::HTML-&gt;parse_string
      ($s =&gt; Whatpm::NanoDOM::Document-&gt;new, $onerror);</pre>
</dd>
<p></p>
<dt><strong><a name="item_get_inner_html"><em>$s</em> = Whatpm::HTML-&gt;get_inner_html (<em>$node</em>[, <em>$onerror</em>]);</a></strong><br />
</dt>
<dd>
Return the HTML serialization of a DOM node <em>$node</em>.
</dd>
<dd>
<p>The first argument, <em>$node</em>, MUST be a DOM <code>Document</code>,
<code>Element</code>, or <code>DocumentFragment</code> node.</p>
</dd>
<dd>
<p>The second argument, <em>$onerror</em>, MUST be a reference to the
error handling code.  This code will be invoked if a descendant
of <em>$node</em> is neither of <code>Element</code>, <code>Text</code>, <code>CDATASection</code>,
<code>Comment</code>, <code>DocumentType</code>, nor <code>EntityReference</code>, so
that an <code>INVALID_STATE_ERR</code> exception MUST be thrown.
The code will be invoked with an argument, which is the node
whose type is invalid.  
The argument <em>$onerror</em> is optional; if missing, any erroneous
node is simply ignored.</p>
</dd>
<dd>
<p>The method returns a reference to the <code>inner_html</code> attribute
value, i.e. the HTML serialization of the <em>$node</em>.</p>
</dd>
<p></p></dl>
<p>
</p>
<hr />
<h1><a name="to_do">TO DO</a></h1>
<p>Tokenizer should emit a sequence of character tokens as one token
to improve performance.</p>
<p>A method that accepts a byte stream as an input.</p>
<p>Charset detection algorithm.</p>
<p>Documentation for the setter of inner_html.</p>
<p>And there are many ``TODO''s and ``ISSUE''s in the source code.</p>
<p>
</p>
<hr />
<h1><a name="see_also">SEE ALSO</a></h1>
<p>Whatpm
&lt;http://suika.fam.cx/www/markup/html/whatpm/readme&gt;</p>
<p>Web Applications 1.0 Working Draft (aka HTML5)
&lt;http://whatwg.org/html5&gt;.  (Revision 792, 1 May 2007)</p>
<p><a href="../Whatpm/NanoDOM.html">the Whatpm::NanoDOM manpage</a></p>
<p>
</p>
<hr />
<h1><a name="author">AUTHOR</a></h1>
<p>Wakaba &lt;<a href="mailto:w@suika.fam.cx">w@suika.fam.cx</a>&gt;.</p>
<p>
</p>
<hr />
<h1><a name="license">LICENSE</a></h1>
<p>Copyright 2007 Wakaba &lt;<a href="mailto:w@suika.fam.cx">w@suika.fam.cx</a>&gt;</p>
<p>This library is free software; you can redistribute it
and/or modify it under the same terms as Perl itself.</p>

</body>

</html>
1	wakaba	1.1	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2			<html xmlns="http://www.w3.org/1999/xhtml">
3			<head>
4	wakaba	1.2	<title>Whatpm::HTML - An HTML Parser</title>
5	wakaba	1.1	<link rel="stylesheet" href="http://suika.fam.cx/www/style/html/pod.css" type="text/css" />
6			<link rev="made" href="mailto:admin@suika.fam.cx" />
7			</head>
8
9			<body>
10
11			<p><a name="__index__"></a></p>
12			<!-- INDEX BEGIN -->
13
14			<ul>
15
16			<li><a href="#name">NAME</a></li>
17			<li><a href="#synopsis">SYNOPSIS</a></li>
18			<li><a href="#description">DESCRIPTION</a></li>
19			<li><a href="#methods">METHODS</a></li>
20			<li><a href="#to_do">TO DO</a></li>
21			<li><a href="#see_also">SEE ALSO</a></li>
22			<li><a href="#author">AUTHOR</a></li>
23			<li><a href="#license">LICENSE</a></li>
24			</ul>
25			<!-- INDEX END -->
26
27			<hr />
28			<p>
29			</p>
30			<h1><a name="name">NAME</a></h1>
31	wakaba	1.2	<p>Whatpm::HTML - An HTML Parser</p>
32	wakaba	1.1	<p>
33			</p>
34			<hr />
35			<h1><a name="synopsis">SYNOPSIS</a></h1>
36			<pre>
37	wakaba	1.2	use Whatpm::HTML;
38	wakaba	1.1
39			my $s = q<<!DOCTYPE html><html>...</html>>;
40			# $doc = an empty DOM \|Document\| object
41			my $on_error = sub {
42			my $error_code = shift;
43			warn $error_code, "\n";
44			};
45
46	wakaba	1.2	Whatpm::HTML->parse_string ($s => $doc, $onerror);
47	wakaba	1.1
48			## Then, \|$doc\| is the DOM representation of \|$s\|.</pre>
49			<p>
50			</p>
51			<hr />
52			<h1><a name="description">DESCRIPTION</a></h1>
53	wakaba	1.2	<p>The <code>Whatpm::HTML</code> module contains HTML parser and serializer.</p>
54	wakaba	1.1	<p>The HTML parser can be used to construct the DOM tree representation
55			from an HTML document. The parsing and tree construction are done
56			as described in the Web Application 1.0 specification.</p>
57			<p>The HTML serializer can be used to obtain the HTML document representation
58			of a DOM tree (or a tree fragment thereof). The serialization
59			is performed as described in the Web Applications 1.0 specification
60			for <code>innerHTML</code> DOM attribute.</p>
61	wakaba	1.2	<p>This module is part of Whatpm - Perl Modules for
62	wakaba	1.1	Web Hypertext Application Technologies.</p>
63			<p>
64			</p>
65			<hr />
66			<h1><a name="methods">METHODS</a></h1>
67			<dl>
68	wakaba	1.2	<dt><strong><a name="item_parse_string">[<em>$doc</em> =] Whatpm::HTML->parse_string (<em>$s</em>, <em>$doc</em>[, <em>$onerror</em>]);</a></strong><br />
69	wakaba	1.1	</dt>
70			<dd>
71			Parse a string <em>$s</em> as an HTML document.
72			</dd>
73			<dd>
74			<p>The first argument, <em>$s</em>, MUST be a string. It is parsed
75			as a sequence of characters representing an HTML document.</p>
76			</dd>
77			<dd>
78			<p>The second argument, <em>$doc</em>, MUST be an empty read-write
79			DOM <code>Document</code> object. The HTML DOM tree is constructed
80			onto this <code>Document</code> object.</p>
81			</dd>
82			<dd>
83			<p>The third argument, <em>$onerror</em>, MUST be a reference to
84			the error handler code. Whenever a parse error is detected,
85			this code is invoked with an argument that contains a
86			useless string that might describe what is wrong.
87			The code MAY throw an exception, so that whole the parsing
88			process aborts. Otherwise, the parser will continue to
89			process the input. The code MUST NOT modify <em>$s</em> or <em>$doc</em>.
90			If it does, then the result is undefined.
91			This argument is optional; if missing, any
92			parse error makes that string being <code>warn</code>ed.</p>
93			</dd>
94			<dd>
95	wakaba	1.3	<p><strong>NOTE</strong>: To be a conforming user agent, the code MUST either
96			abort the processing by throwing an exception at the first
97			invocation or MUST continue the processing until the parser
98			stops.</p>
99			</dd>
100			<dd>
101	wakaba	1.1	<p>The method returns the DOM <code>Document</code> object (i.e. the second argument).</p>
102			</dd>
103			<dd>
104	wakaba	1.2	<p>Note that the <code>Whatpm::NanoDOM</code> module provides a non-conforming
105	wakaba	1.4	implementation of DOM that only implements a subset that
106	wakaba	1.2	is necessary for the purpose of <code>Whatpm::HTML</code>'s parsing and
107	wakaba	1.1	serializing.
108			With this module, creating a new HTML <code>Document</code> object
109	wakaba	1.3	from a string containing HTML document might be coded as:</p>
110	wakaba	1.1	</dd>
111			<dd>
112			<pre>
113	wakaba	1.2	use Whatpm::HTML;
114			use Whatpm::NanoDOM;
115			my $doc = Whatpm::HTML->parse_string
116			($s => Whatpm::NanoDOM::Document->new, $onerror);</pre>
117	wakaba	1.1	</dd>
118			<p></p>
119	wakaba	1.2	<dt><strong><a name="item_get_inner_html"><em>$s</em> = Whatpm::HTML->get_inner_html (<em>$node</em>[, <em>$onerror</em>]);</a></strong><br />
120	wakaba	1.1	</dt>
121			<dd>
122			Return the HTML serialization of a DOM node <em>$node</em>.
123			</dd>
124			<dd>
125			<p>The first argument, <em>$node</em>, MUST be a DOM <code>Document</code>,
126	wakaba	1.4	<code>Element</code>, or <code>DocumentFragment</code> node.</p>
127	wakaba	1.1	</dd>
128			<dd>
129			<p>The second argument, <em>$onerror</em>, MUST be a reference to the
130			error handling code. This code will be invoked if a descendant
131	wakaba	1.4	of <em>$node</em> is neither of <code>Element</code>, <code>Text</code>, <code>CDATASection</code>,
132			<code>Comment</code>, <code>DocumentType</code>, nor <code>EntityReference</code>, so
133			that an <code>INVALID_STATE_ERR</code> exception MUST be thrown.
134	wakaba	1.1	The code will be invoked with an argument, which is the node
135			whose type is invalid.
136	wakaba	1.4	The argument <em>$onerror</em> is optional; if missing, any erroneous
137	wakaba	1.1	node is simply ignored.</p>
138			</dd>
139			<dd>
140	wakaba	1.2	<p>The method returns a reference to the <code>inner_html</code> attribute
141	wakaba	1.3	value, i.e. the HTML serialization of the <em>$node</em>.</p>
142	wakaba	1.1	</dd>
143			<p></p></dl>
144			<p>
145			</p>
146			<hr />
147			<h1><a name="to_do">TO DO</a></h1>
148			<p>Tokenizer should emit a sequence of character tokens as one token
149			to improve performance.</p>
150			<p>A method that accepts a byte stream as an input.</p>
151			<p>Charset detection algorithm.</p>
152	wakaba	1.4	<p>Documentation for the setter of inner_html.</p>
153	wakaba	1.1	<p>And there are many ``TODO''s and ``ISSUE''s in the source code.</p>
154			<p>
155			</p>
156			<hr />
157			<h1><a name="see_also">SEE ALSO</a></h1>
158	wakaba	1.3	<p>Whatpm
159			<http://suika.fam.cx/www/markup/html/whatpm/readme></p>
160	wakaba	1.1	<p>Web Applications 1.0 Working Draft (aka HTML5)
161			<http://whatwg.org/html5>. (Revision 792, 1 May 2007)</p>
162	wakaba	1.2	<p><a href="../Whatpm/NanoDOM.html">the Whatpm::NanoDOM manpage</a></p>
163	wakaba	1.1	<p>
164			</p>
165			<hr />
166			<h1><a name="author">AUTHOR</a></h1>
167			<p>Wakaba <<a href="mailto:w@suika.fam.cx">w@suika.fam.cx</a>>.</p>
168			<p>
169			</p>
170			<hr />
171			<h1><a name="license">LICENSE</a></h1>
172			<p>Copyright 2007 Wakaba <<a href="mailto:w@suika.fam.cx">w@suika.fam.cx</a>></p>
173			<p>This library is free software; you can redistribute it
174			and/or modify it under the same terms as Perl itself.</p>
175
176			</body>
177
178			</html>