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16 | <title>13.3.1 HTMLParser Objects </title> | |
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54 | <H2><A NAME="SECTION0015310000000000000000"></A><A NAME="html-parser-objects"></A> | |
55 | <BR> | |
56 | 13.3.1 HTMLParser Objects | |
57 | </H2> | |
58 | ||
59 | <P> | |
60 | In addition to tag methods, the <tt class="class">HTMLParser</tt> class provides some | |
61 | additional methods and instance variables for use within tag methods. | |
62 | ||
63 | <P> | |
64 | <dl><dt><b><tt id='l2h-4289' xml:id='l2h-4289' class="member">formatter</tt></b></dt> | |
65 | <dd> | |
66 | This is the formatter instance associated with the parser. | |
67 | </dl> | |
68 | ||
69 | <P> | |
70 | <dl><dt><b><tt id='l2h-4290' xml:id='l2h-4290' class="member">nofill</tt></b></dt> | |
71 | <dd> | |
72 | Boolean flag which should be true when whitespace should not be | |
73 | collapsed, or false when it should be. In general, this should only | |
74 | be true when character data is to be treated as ``preformatted'' text, | |
75 | as within a <code><PRE></code> element. The default value is false. This | |
76 | affects the operation of <tt class="method">handle_data()</tt> and <tt class="method">save_end()</tt>. | |
77 | </dl> | |
78 | ||
79 | <P> | |
80 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
81 | <td><nobr><b><tt id='l2h-4291' xml:id='l2h-4291' class="method">anchor_bgn</tt></b>(</nobr></td> | |
82 | <td><var>href, name, type</var>)</td></tr></table></dt> | |
83 | <dd> | |
84 | This method is called at the start of an anchor region. The arguments | |
85 | correspond to the attributes of the <code><A></code> tag with the same | |
86 | names. The default implementation maintains a list of hyperlinks | |
87 | (defined by the <code>HREF</code> attribute for <code><A></code> tags) within the | |
88 | document. The list of hyperlinks is available as the data attribute | |
89 | <tt class="member">anchorlist</tt>. | |
90 | </dl> | |
91 | ||
92 | <P> | |
93 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
94 | <td><nobr><b><tt id='l2h-4292' xml:id='l2h-4292' class="method">anchor_end</tt></b>(</nobr></td> | |
95 | <td><var></var>)</td></tr></table></dt> | |
96 | <dd> | |
97 | This method is called at the end of an anchor region. The default | |
98 | implementation adds a textual footnote marker using an index into the | |
99 | list of hyperlinks created by <tt class="method">anchor_bgn()</tt>. | |
100 | </dl> | |
101 | ||
102 | <P> | |
103 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
104 | <td><nobr><b><tt id='l2h-4293' xml:id='l2h-4293' class="method">handle_image</tt></b>(</nobr></td> | |
105 | <td><var>source, alt</var><big>[</big><var>, ismap</var><big>[</big><var>, | |
106 | align</var><big>[</big><var>, width</var><big>[</big><var>, height</var><big>]</big><var></var><big>]</big><var></var><big>]</big><var></var><big>]</big><var></var>)</td></tr></table></dt> | |
107 | <dd> | |
108 | This method is called to handle images. The default implementation | |
109 | simply passes the <var>alt</var> value to the <tt class="method">handle_data()</tt> | |
110 | method. | |
111 | </dl> | |
112 | ||
113 | <P> | |
114 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
115 | <td><nobr><b><tt id='l2h-4294' xml:id='l2h-4294' class="method">save_bgn</tt></b>(</nobr></td> | |
116 | <td><var></var>)</td></tr></table></dt> | |
117 | <dd> | |
118 | Begins saving character data in a buffer instead of sending it to the | |
119 | formatter object. Retrieve the stored data via <tt class="method">save_end()</tt>. | |
120 | Use of the <tt class="method">save_bgn()</tt> / <tt class="method">save_end()</tt> pair may not be | |
121 | nested. | |
122 | </dl> | |
123 | ||
124 | <P> | |
125 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
126 | <td><nobr><b><tt id='l2h-4295' xml:id='l2h-4295' class="method">save_end</tt></b>(</nobr></td> | |
127 | <td><var></var>)</td></tr></table></dt> | |
128 | <dd> | |
129 | Ends buffering character data and returns all data saved since the | |
130 | preceding call to <tt class="method">save_bgn()</tt>. If the <tt class="member">nofill</tt> flag is | |
131 | false, whitespace is collapsed to single spaces. A call to this | |
132 | method without a preceding call to <tt class="method">save_bgn()</tt> will raise a | |
133 | <tt class="exception">TypeError</tt> exception. | |
134 | </dl> | |
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