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55 | <H2><A NAME="SECTION0014120000000000000000"></A><A NAME="formatter-impls"></A> | |
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57 | 12.1.2 Formatter Implementations | |
58 | </H2> | |
59 | ||
60 | <P> | |
61 | Two implementations of formatter objects are provided by this module. | |
62 | Most applications may use one of these classes without modification or | |
63 | subclassing. | |
64 | ||
65 | <P> | |
66 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
67 | <td><nobr><b><span class="typelabel">class</span> <tt id='l2h-3810' xml:id='l2h-3810' class="class">NullFormatter</tt></b>(</nobr></td> | |
68 | <td><var></var><big>[</big><var>writer</var><big>]</big><var></var>)</td></tr></table></dt> | |
69 | <dd> | |
70 | A formatter which does nothing. If <var>writer</var> is omitted, a | |
71 | <tt class="class">NullWriter</tt> instance is created. No methods of the writer are | |
72 | called by <tt class="class">NullFormatter</tt> instances. Implementations should | |
73 | inherit from this class if implementing a writer interface but don't | |
74 | need to inherit any implementation. | |
75 | </dl> | |
76 | ||
77 | <P> | |
78 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
79 | <td><nobr><b><span class="typelabel">class</span> <tt id='l2h-3811' xml:id='l2h-3811' class="class">AbstractFormatter</tt></b>(</nobr></td> | |
80 | <td><var>writer</var>)</td></tr></table></dt> | |
81 | <dd> | |
82 | The standard formatter. This implementation has demonstrated wide | |
83 | applicability to many writers, and may be used directly in most | |
84 | circumstances. It has been used to implement a full-featured | |
85 | World Wide Web browser. | |
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