[OpenSPARC-T2-SAM] / sam-t2 / devtools / amd64 / html / python / lib / writer-interface.html

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<H2><A NAME="SECTION0014130000000000000000"></A><A NAME="writer-interface"></A>
<BR>
12.1.3 The Writer Interface 
</H2>

<P>
Interfaces to create writers are dependent on the specific writer
class being instantiated.  The interfaces described below are the
required interfaces which all writers must support once initialized.
Note that while most applications can use the
<tt class="class">AbstractFormatter</tt> class as a formatter, the writer must
typically be provided by the application.

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3812' xml:id='l2h-3812' class="method">flush</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
Flush any buffered output or device control events.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3813' xml:id='l2h-3813' class="method">new_alignment</tt></b>(</nobr></td>
  <td><var>align</var>)</td></tr></table></dt>
<dd>
Set the alignment style.  The <var>align</var> value can be any object,
but by convention is a string or <code>None</code>, where <code>None</code>
indicates that the writer's ``preferred'' alignment should be used.
Conventional <var>align</var> values are <code>'left'</code>, <code>'center'</code>,
<code>'right'</code>, and <code>'justify'</code>.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3814' xml:id='l2h-3814' class="method">new_font</tt></b>(</nobr></td>
  <td><var>font</var>)</td></tr></table></dt>
<dd>
Set the font style.  The value of <var>font</var> will be <code>None</code>,
indicating that the device's default font should be used, or a tuple
of the form <code>(</code><var>size</var>, <var>italic</var>, <var>bold</var>,
<var>teletype</var><code>)</code>.  Size will be a string indicating the size of
font that should be used; specific strings and their interpretation
must be defined by the application.  The <var>italic</var>, <var>bold</var>, and
<var>teletype</var> values are Boolean values specifying which of those
font attributes should be used.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3815' xml:id='l2h-3815' class="method">new_margin</tt></b>(</nobr></td>
  <td><var>margin, level</var>)</td></tr></table></dt>
<dd>
Set the margin level to the integer <var>level</var> and the logical tag
to <var>margin</var>.  Interpretation of the logical tag is at the
writer's discretion; the only restriction on the value of the logical
tag is that it not be a false value for non-zero values of
<var>level</var>.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3816' xml:id='l2h-3816' class="method">new_spacing</tt></b>(</nobr></td>
  <td><var>spacing</var>)</td></tr></table></dt>
<dd>
Set the spacing style to <var>spacing</var>.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3817' xml:id='l2h-3817' class="method">new_styles</tt></b>(</nobr></td>
  <td><var>styles</var>)</td></tr></table></dt>
<dd>
Set additional styles.  The <var>styles</var> value is a tuple of
arbitrary values; the value <tt class="constant">AS_IS</tt> should be ignored.  The
<var>styles</var> tuple may be interpreted either as a set or as a stack
depending on the requirements of the application and writer
implementation.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3818' xml:id='l2h-3818' class="method">send_line_break</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
Break the current line.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3819' xml:id='l2h-3819' class="method">send_paragraph</tt></b>(</nobr></td>
  <td><var>blankline</var>)</td></tr></table></dt>
<dd>
Produce a paragraph separation of at least <var>blankline</var> blank
lines, or the equivalent.  The <var>blankline</var> value will be an
integer.  Note that the implementation will receive a call to
<tt class="method">send_line_break()</tt> before this call if a line break is needed; 
this method should not include ending the last line of the paragraph.
It is only responsible for vertical spacing between paragraphs.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3820' xml:id='l2h-3820' class="method">send_hor_rule</tt></b>(</nobr></td>
  <td><var>*args, **kw</var>)</td></tr></table></dt>
<dd>
Display a horizontal rule on the output device.  The arguments to this
method are entirely application- and writer-specific, and should be
interpreted with care.  The method implementation may assume that a
line break has already been issued via <tt class="method">send_line_break()</tt>.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3821' xml:id='l2h-3821' class="method">send_flowing_data</tt></b>(</nobr></td>
  <td><var>data</var>)</td></tr></table></dt>
<dd>
Output character data which may be word-wrapped and re-flowed as
needed.  Within any sequence of calls to this method, the writer may
assume that spans of multiple whitespace characters have been
collapsed to single space characters.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3822' xml:id='l2h-3822' class="method">send_literal_data</tt></b>(</nobr></td>
  <td><var>data</var>)</td></tr></table></dt>
<dd>
Output character data which has already been formatted
for display.  Generally, this should be interpreted to mean that line
breaks indicated by newline characters should be preserved and no new
line breaks should be introduced.  The data may contain embedded
newline and tab characters, unlike data provided to the
<tt class="method">send_formatted_data()</tt> interface.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3823' xml:id='l2h-3823' class="method">send_label_data</tt></b>(</nobr></td>
  <td><var>data</var>)</td></tr></table></dt>
<dd>
Set <var>data</var> to the left of the current left margin, if possible.
The value of <var>data</var> is not restricted; treatment of non-string
values is entirely application- and writer-dependent.  This method
will only be called at the beginning of a line.
</dl>

<P>

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<span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span>
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Commit	Line	Data
920dae64 AT	1	<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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	54
	55	<H2><A NAME="SECTION0014130000000000000000"></A><A NAME="writer-interface"></A>
	56	<BR>
	57	12.1.3 The Writer Interface
	58	</H2>
	59
	60	<P>
	61	Interfaces to create writers are dependent on the specific writer
	62	class being instantiated. The interfaces described below are the
	63	required interfaces which all writers must support once initialized.
	64	Note that while most applications can use the
65	<tt class="class">AbstractFormatter</tt> class as a formatter, the writer must
66	typically be provided by the application.
67
68	<P>
69	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
70	<td><nobr><b><tt id='l2h-3812' xml:id='l2h-3812' class="method">flush</tt></b>(</nobr></td>
71	<td><var></var>)</td></tr></table></dt>
72	<dd>
73	Flush any buffered output or device control events.
74	</dl>
75
76	<P>
77	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
78	<td><nobr><b><tt id='l2h-3813' xml:id='l2h-3813' class="method">new_alignment</tt></b>(</nobr></td>
79	<td><var>align</var>)</td></tr></table></dt>
80	<dd>
81	Set the alignment style. The <var>align</var> value can be any object,
82	but by convention is a string or <code>None</code>, where <code>None</code>
83	indicates that the writer's ``preferred'' alignment should be used.
84	Conventional <var>align</var> values are <code>'left'</code>, <code>'center'</code>,
85	<code>'right'</code>, and <code>'justify'</code>.
86	</dl>
87
88	<P>
89	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
90	<td><nobr><b><tt id='l2h-3814' xml:id='l2h-3814' class="method">new_font</tt></b>(</nobr></td>
91	<td><var>font</var>)</td></tr></table></dt>
92	<dd>
93	Set the font style. The value of <var>font</var> will be <code>None</code>,
94	indicating that the device's default font should be used, or a tuple
95	of the form <code>(</code><var>size</var>, <var>italic</var>, <var>bold</var>,
96	<var>teletype</var><code>)</code>. Size will be a string indicating the size of
97	font that should be used; specific strings and their interpretation
98	must be defined by the application. The <var>italic</var>, <var>bold</var>, and
99	<var>teletype</var> values are Boolean values specifying which of those
100	font attributes should be used.
101	</dl>
102
103	<P>
104	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
105	<td><nobr><b><tt id='l2h-3815' xml:id='l2h-3815' class="method">new_margin</tt></b>(</nobr></td>
106	<td><var>margin, level</var>)</td></tr></table></dt>
107	<dd>
108	Set the margin level to the integer <var>level</var> and the logical tag
109	to <var>margin</var>. Interpretation of the logical tag is at the
110	writer's discretion; the only restriction on the value of the logical
111	tag is that it not be a false value for non-zero values of
112	<var>level</var>.
113	</dl>
114
115	<P>
116	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
117	<td><nobr><b><tt id='l2h-3816' xml:id='l2h-3816' class="method">new_spacing</tt></b>(</nobr></td>
118	<td><var>spacing</var>)</td></tr></table></dt>
119	<dd>
120	Set the spacing style to <var>spacing</var>.
121	</dl>
122
123	<P>
124	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
125	<td><nobr><b><tt id='l2h-3817' xml:id='l2h-3817' class="method">new_styles</tt></b>(</nobr></td>
126	<td><var>styles</var>)</td></tr></table></dt>
127	<dd>
128	Set additional styles. The <var>styles</var> value is a tuple of
129	arbitrary values; the value <tt class="constant">AS_IS</tt> should be ignored. The
130	<var>styles</var> tuple may be interpreted either as a set or as a stack
131	depending on the requirements of the application and writer
132	implementation.
133	</dl>
134
135	<P>
136	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
137	<td><nobr><b><tt id='l2h-3818' xml:id='l2h-3818' class="method">send_line_break</tt></b>(</nobr></td>
138	<td><var></var>)</td></tr></table></dt>
139	<dd>
140	Break the current line.
141	</dl>
142
143	<P>
144	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
145	<td><nobr><b><tt id='l2h-3819' xml:id='l2h-3819' class="method">send_paragraph</tt></b>(</nobr></td>
146	<td><var>blankline</var>)</td></tr></table></dt>
147	<dd>
148	Produce a paragraph separation of at least <var>blankline</var> blank
149	lines, or the equivalent. The <var>blankline</var> value will be an
150	integer. Note that the implementation will receive a call to
151	<tt class="method">send_line_break()</tt> before this call if a line break is needed;
152	this method should not include ending the last line of the paragraph.
153	It is only responsible for vertical spacing between paragraphs.
154	</dl>
155
156	<P>
157	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
158	<td><nobr><b><tt id='l2h-3820' xml:id='l2h-3820' class="method">send_hor_rule</tt></b>(</nobr></td>
159	<td><var>args, *kw</var>)</td></tr></table></dt>
160	<dd>
161	Display a horizontal rule on the output device. The arguments to this
162	method are entirely application- and writer-specific, and should be
163	interpreted with care. The method implementation may assume that a
164	line break has already been issued via <tt class="method">send_line_break()</tt>.
165	</dl>
166
167	<P>
168	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
169	<td><nobr><b><tt id='l2h-3821' xml:id='l2h-3821' class="method">send_flowing_data</tt></b>(</nobr></td>
170	<td><var>data</var>)</td></tr></table></dt>
171	<dd>
172	Output character data which may be word-wrapped and re-flowed as
173	needed. Within any sequence of calls to this method, the writer may
174	assume that spans of multiple whitespace characters have been
175	collapsed to single space characters.
176	</dl>
177
178	<P>
179	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
180	<td><nobr><b><tt id='l2h-3822' xml:id='l2h-3822' class="method">send_literal_data</tt></b>(</nobr></td>
181	<td><var>data</var>)</td></tr></table></dt>
182	<dd>
183	Output character data which has already been formatted
184	for display. Generally, this should be interpreted to mean that line
185	breaks indicated by newline characters should be preserved and no new
186	line breaks should be introduced. The data may contain embedded
187	newline and tab characters, unlike data provided to the
188	<tt class="method">send_formatted_data()</tt> interface.
189	</dl>
190
191	<P>
192	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
193	<td><nobr><b><tt id='l2h-3823' xml:id='l2h-3823' class="method">send_label_data</tt></b>(</nobr></td>
194	<td><var>data</var>)</td></tr></table></dt>
195	<dd>
196	Set <var>data</var> to the left of the current left margin, if possible.
197	The value of <var>data</var> is not restricted; treatment of non-string
198	values is entirely application- and writer-dependent. This method
199	will only be called at the beginning of a line.
200	</dl>
201
202	<P>
203
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238	<span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span>
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