inweb-bootstrap/docs/inweb/5-fm.html
2020-04-11 13:08:53 +01:00

1185 lines
154 KiB
HTML

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Format Methods</title>
<meta name="viewport" content="width=device-width initial-scale=1">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="Content-Language" content="en-gb">
<link href="../inweb.css" rel="stylesheet" rev="stylesheet" type="text/css">
</head>
<body>
<nav role="navigation">
<h1><a href="../webs.html">Sources</a></h1>
<ul>
<li><a href="../inweb/index.html">inweb</a></li>
</ul>
<h2>Foundation</h2>
<ul>
<li><a href="../foundation-module/index.html">foundation-module</a></li>
<li><a href="../foundation-test/index.html">foundation-test</a></li>
</ul>
</nav>
<main role="main">
<!--Weave of 'Format Methods' generated by 7-->
<ul class="crumbs"><li><a href="../webs.html">Source</a></li><li><a href="index.html">inweb</a></li><li><a href="index.html#5">Chapter 5: Formats</a></li><li><b>Format Methods</b></li></ul><p class="purpose">To characterise the relevant differences in behaviour between the various weaving formats offered, such as HTML, ePub, or TeX.</p>
<ul class="toc"><li><a href="#SP1">&#167;1. Formats</a></li><li><a href="#SP3">&#167;3. Creation</a></li><li><a href="#SP4">&#167;4. Methods</a></li><li><a href="#SP34">&#167;34. Post-processing</a></li></ul><hr class="tocbar">
<p class="inwebparagraph"><a id="SP1"></a><b>&#167;1. Formats. </b>Exactly as in the previous chapter, each format expresses its behaviour
through optional method calls.
</p>
<pre class="display">
<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">weave_format</span><span class="plain"> {</span>
<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">format_name</span><span class="plain">;</span>
<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">woven_extension</span><span class="plain">;</span>
<span class="constant">METHOD_CALLS</span>
<span class="constant">MEMORY_MANAGEMENT</span>
<span class="plain">} </span><span class="reserved">weave_format</span><span class="plain">;</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="functiontext">Formats::create_weave_format</span><span class="plain">(</span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">name</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">ext</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">CREATE</span><span class="plain">(</span><span class="reserved">weave_format</span><span class="plain">);</span>
<span class="identifier">wf</span><span class="plain">-&gt;</span><span class="element">format_name</span><span class="plain"> = </span><span class="functiontext">Str::duplicate</span><span class="plain">(</span><span class="identifier">name</span><span class="plain">);</span>
<span class="identifier">wf</span><span class="plain">-&gt;</span><span class="element">woven_extension</span><span class="plain"> = </span><span class="functiontext">Str::duplicate</span><span class="plain">(</span><span class="identifier">ext</span><span class="plain">);</span>
<span class="identifier">ENABLE_METHOD_CALLS</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">wf</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="functiontext">Formats::find_by_name</span><span class="plain">(</span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">name</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">;</span>
<span class="identifier">LOOP_OVER</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain">)</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Str::eq_insensitive</span><span class="plain">(</span><span class="identifier">name</span><span class="plain">, </span><span class="identifier">wf</span><span class="plain">-&gt;</span><span class="element">format_name</span><span class="plain">))</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">wf</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::create_weave_format is used in 5/ptf (<a href="5-ptf.html#SP1">&#167;1</a>), 5/tf (<a href="5-tf.html#SP1_1">&#167;1.1</a>, <a href="5-tf.html#SP1_2">&#167;1.2</a>, <a href="5-tf.html#SP1_3">&#167;1.3</a>), 5/hf (<a href="5-hf.html#SP1_1">&#167;1.1</a>, <a href="5-hf.html#SP1_2">&#167;1.2</a>).</p>
<p class="endnote">The function Formats::find_by_name is used in <a href="#SP36">&#167;36</a>, 1/ptt (<a href="1-ptt.html#SP3_2">&#167;3.2</a>).</p>
<p class="endnote">The structure weave_format is accessed in 3/ts and here.</p>
<p class="inwebparagraph"><a id="SP2"></a><b>&#167;2. </b>Note that this is the file extension before any post-processing. For
example, PDFs are made by weaving a TeX file and then running this through
<code class="display"><span class="extract">pdftex</span></code>. The extension here will be <code class="display"><span class="extract">.tex</span></code> because that's what the weave
stage produces, even though we will later end up with a <code class="display"><span class="extract">.pdf</span></code>.
</p>
<pre class="display">
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="functiontext">Formats::file_extension</span><span class="plain">(</span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">) {</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">wf</span><span class="plain">-&gt;</span><span class="identifier">woven_extension</span><span class="plain">;</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::file_extension is used in 3/ts (<a href="3-ts.html#SP2_2_1">&#167;2.2.1</a>), 3/ti (<a href="3-ti.html#SP1">&#167;1</a>).</p>
<p class="inwebparagraph"><a id="SP3"></a><b>&#167;3. Creation. </b>This must be performed very early in Inweb's run.
</p>
<pre class="display">
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::create_weave_formats</span><span class="plain">(</span><span class="reserved">void</span><span class="plain">) {</span>
<span class="functiontext">TeX::create</span><span class="plain">();</span>
<span class="functiontext">PlainText::create</span><span class="plain">();</span>
<span class="functiontext">HTMLFormat::create</span><span class="plain">();</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::create_weave_formats is used in 1/pc (<a href="1-pc.html#SP6_1">&#167;6.1</a>).</p>
<p class="inwebparagraph"><a id="SP4"></a><b>&#167;4. Methods. </b>These two don't allow output to be produced: they're for any setting up and
putting away that needs tp be done.
</p>
<p class="inwebparagraph"><code class="display"><span class="extract">BEGIN_WEAVING_FOR_MTID</span></code> is called before any output is generated, indeed,
before even the filename(s) for the output are worked out. Note that it
can return a <code class="display"><span class="extract">*_SWM</span></code> code to change the swarm behaviour of the weave to come;
this is helpful for EPUB weaving.
</p>
<p class="inwebparagraph">More simply, <code class="display"><span class="extract">END_WEAVING_FOR_MTID</span></code> is called when all weaving is done.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">BEGIN_WEAVING_FOR_MTID</span>
<span class="definitionkeyword">enum</span> <span class="constant">END_WEAVING_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">IMETHOD_TYPE</span><span class="plain">(</span><span class="constant">BEGIN_WEAVING_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">web</span><span class="plain"> *</span><span class="identifier">W</span><span class="plain">, </span><span class="reserved">weave_pattern</span><span class="plain"> *</span><span class="identifier">pattern</span><span class="plain">)</span>
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">END_WEAVING_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">web</span><span class="plain"> *</span><span class="identifier">W</span><span class="plain">, </span><span class="reserved">weave_pattern</span><span class="plain"> *</span><span class="identifier">pattern</span><span class="plain">)</span>
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Formats::begin_weaving</span><span class="plain">(</span><span class="reserved">web</span><span class="plain"> *</span><span class="identifier">W</span><span class="plain">, </span><span class="reserved">weave_pattern</span><span class="plain"> *</span><span class="identifier">pattern</span><span class="plain">) {</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">rv</span><span class="plain"> = </span><span class="constant">FALSE</span><span class="plain">;</span>
<span class="identifier">IMETHOD_CALL</span><span class="plain">(</span><span class="identifier">rv</span><span class="plain">, </span><span class="identifier">pattern</span><span class="plain">-&gt;</span><span class="element">pattern_format</span><span class="plain">, </span><span class="constant">BEGIN_WEAVING_FOR_MTID</span><span class="plain">, </span><span class="identifier">W</span><span class="plain">, </span><span class="identifier">pattern</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">rv</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">rv</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="constant">SWARM_OFF_SWM</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::end_weaving</span><span class="plain">(</span><span class="reserved">web</span><span class="plain"> *</span><span class="identifier">W</span><span class="plain">, </span><span class="reserved">weave_pattern</span><span class="plain"> *</span><span class="identifier">pattern</span><span class="plain">) {</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">pattern</span><span class="plain">-&gt;</span><span class="element">pattern_format</span><span class="plain">, </span><span class="constant">END_WEAVING_FOR_MTID</span><span class="plain">, </span><span class="identifier">W</span><span class="plain">, </span><span class="identifier">pattern</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::begin_weaving is used in 1/pc (<a href="1-pc.html#SP7_4_3">&#167;7.4.3</a>).</p>
<p class="endnote">The function Formats::end_weaving is used in 1/pc (<a href="1-pc.html#SP7_4_3">&#167;7.4.3</a>).</p>
<p class="inwebparagraph"><a id="SP5"></a><b>&#167;5. </b>Now the weave output, roughly in order from top to bottom.
</p>
<p class="inwebparagraph"><code class="display"><span class="extract">TOP_FOR_MTID</span></code> has the opportunity to put a header at the top of the woven
file. The <code class="display"><span class="extract">comment</span></code> will be anodyne text such as "Weave of... generated at...",
which isn't intended to be read by human eyes, and might become e.g. an
HTML comment.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">TOP_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">TOP_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">comment</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::top</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">comment</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">TOP_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">comment</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::top is used in 3/tw (<a href="3-tw.html#SP1_1">&#167;1.1</a>).</p>
<p class="inwebparagraph"><a id="SP6"></a><b>&#167;6. </b>The <code class="display"><span class="extract">TOC_FOR_MTID</span></code> method should weave a table of contents at the top of a section.
It is called with four possible values of <code class="display"><span class="extract">stage</span></code>:
</p>
<p class="inwebparagraph"></p>
<ul class="items"><li>(a) 1 for the introductory text, which is in <code class="display"><span class="extract">text1</span></code>;
</li><li>(b) 2 for a division between contents items;
</li><li>(c) 3 for a contents item, with paragraph number <code class="display"><span class="extract">text1</span></code> and heading <code class="display"><span class="extract">text2</span></code>;
</li><li>(d) 4 for any concluding text, such as a full stop, or skipped line.
</li></ul>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">TOC_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">TOC_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">stage</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">text1</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">text2</span><span class="plain">, </span><span class="reserved">paragraph</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::toc</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">stage</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">text1</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">text2</span><span class="plain">, </span><span class="reserved">paragraph</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">TOC_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">stage</span><span class="plain">, </span><span class="identifier">text1</span><span class="plain">, </span><span class="identifier">text2</span><span class="plain">, </span><span class="identifier">P</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::toc is used in 3/tw (<a href="3-tw.html#SP3">&#167;3</a>).</p>
<p class="inwebparagraph"><a id="SP7"></a><b>&#167;7. </b>When whole chapters are wovem, or all-in-one weaves include multiple
chapters, the format can add a table of chapter contents, or some similar
interstitial material. This is how:
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">CHAPTER_TP_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">CHAPTER_TP_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">chapter</span><span class="plain"> *</span><span class="identifier">C</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::chapter_title_page</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">chapter</span><span class="plain"> *</span><span class="identifier">C</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">CHAPTER_TP_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">C</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::chapter_title_page is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_10">&#167;1.3.4.1.10</a>).</p>
<p class="inwebparagraph"><a id="SP8"></a><b>&#167;8. </b>The <code class="display"><span class="extract">SUBHEADING_FOR_MTID</span></code> method is expected to produce subheadings of
two levels of importance, where <code class="display"><span class="extract">level</span></code> is
</p>
<p class="inwebparagraph"></p>
<ul class="items"><li>(a) 1 for extract subheadings used in themed weaves, or
</li><li>(b) 2 for minor headings such as the "Purpose" at the top of a section,
or (for old webs which still have them) "Definitions" headings.
</li></ul>
<p class="inwebparagraph">Note that paragraph headings (the result of <code class="display"><span class="extract">@h</span></code>) do not fall under this
method. The <code class="display"><span class="extract">heading</span></code> is the text for it; the <code class="display"><span class="extract">addendum</span></code> if not <code class="display"><span class="extract">NULL</span></code> is
some supplementary text, used in some cases for running heads.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">SUBHEADING_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">SUBHEADING_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">level</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">heading</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">addendum</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::subheading</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">level</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">heading</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">addendum</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">SUBHEADING_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">level</span><span class="plain">, </span><span class="identifier">heading</span><span class="plain">, </span><span class="identifier">addendum</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::subheading is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_3">&#167;1.3.4.1.3</a>, <a href="3-tw.html#SP1_3_4_1_6">&#167;1.3.4.1.6</a>, <a href="3-tw.html#SP1_3_4_1_10_3_1">&#167;1.3.4.1.10.3.1</a>).</p>
<p class="inwebparagraph"><a id="SP9"></a><b>&#167;9. </b>And now we do paragraph headings. This method has rather a lot of
arguments, but for most formats, some can be ignored. In particular
<code class="display"><span class="extract">TeX_macro</span></code>, <code class="display"><span class="extract">chaptermark</span></code>, and <code class="display"><span class="extract">sectionmark</span></code> have been precalculated for
the benefit of the TeX format, and all other formats can leave them be.
</p>
<p class="inwebparagraph"><code class="display"><span class="extract">weight</span></code> is more significant, and is
</p>
<p class="inwebparagraph"></p>
<ul class="items"><li>(a) 1 for a <code class="display"><span class="extract">@h</span></code> paragraph heading,
</li><li>(b) 2 for a section heading,
</li><li>(c) 3 for a chapter heading.
</li></ul>
<p class="inwebparagraph">In each case, the text of the heading is (unsurprisingly) in <code class="display"><span class="extract">heading_text</span></code>.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">PARAGRAPH_HEADING_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">PARAGRAPH_HEADING_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">,</span>
<span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">TeX_macro</span><span class="plain">, </span><span class="reserved">section</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain">, </span><span class="reserved">paragraph</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">heading_text</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">chaptermark</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">sectionmark</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">weight</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::paragraph_heading</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">TeX_macro</span><span class="plain">,</span>
<span class="reserved">section</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain">, </span><span class="reserved">paragraph</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">heading_text</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">chaptermark</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">sectionmark</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">weight</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">PARAGRAPH_HEADING_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">TeX_macro</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">, </span><span class="identifier">P</span><span class="plain">,</span>
<span class="identifier">heading_text</span><span class="plain">, </span><span class="identifier">chaptermark</span><span class="plain">, </span><span class="identifier">sectionmark</span><span class="plain">, </span><span class="identifier">weight</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::paragraph_heading is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_10">&#167;1.3.4.1.10</a>).</p>
<p class="inwebparagraph"><a id="SP10"></a><b>&#167;10. </b>The following method is expected to weave a piece of code, which has already
been syntax-coloured; there can also be some indentation, and perhaps even some
<code class="display"><span class="extract">prefatory</span></code> text before the line of code, and also potentially a
<code class="display"><span class="extract">concluding_comment</span></code> at the end of the line.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">SOURCE_CODE_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">SOURCE_CODE_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">tab_stops_of_indentation</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">prefatory</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">matter</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">colouring</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">concluding_comment</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">starts</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">finishes</span><span class="plain">,</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">code_mode</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">linked</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::source_code</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">tab_stops_of_indentation</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">prefatory</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">matter</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">colouring</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">concluding_comment</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">starts</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">finishes</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">code_mode</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">linked</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">SOURCE_CODE_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">tab_stops_of_indentation</span><span class="plain">,</span>
<span class="identifier">prefatory</span><span class="plain">, </span><span class="identifier">matter</span><span class="plain">, </span><span class="identifier">colouring</span><span class="plain">, </span><span class="identifier">concluding_comment</span><span class="plain">, </span><span class="identifier">starts</span><span class="plain">, </span><span class="identifier">finishes</span><span class="plain">, </span><span class="identifier">code_mode</span><span class="plain">, </span><span class="identifier">linked</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::source_code is used in <a href="#SP11">&#167;11</a>, 3/tw (<a href="3-tw.html#SP1_3_4_1_8_4">&#167;1.3.4.1.8.4</a>, <a href="3-tw.html#SP1_3_4_1_9">&#167;1.3.4.1.9</a>, <a href="3-tw.html#SP1_3_4_1_9_6">&#167;1.3.4.1.9.6</a>).</p>
<p class="inwebparagraph"><a id="SP11"></a><b>&#167;11. </b>More primitively, this method weaves a piece of code which has been coloured
drably in a uniform <code class="display"><span class="extract">EXTRACT_COLOUR</span></code> colour. This is used for weaving words like
<code class="display"><span class="extract">these_ones</span></code> of code given inside commentary.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">INLINE_CODE_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">INLINE_CODE_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">pre</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::source_fragment</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">fragment</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">INLINE_CODE_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="constant">TRUE</span><span class="plain">);</span>
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">colouring</span><span class="plain">);</span>
<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain">&lt; </span><span class="functiontext">Str::len</span><span class="plain">(</span><span class="identifier">fragment</span><span class="plain">); </span><span class="identifier">i</span><span class="plain">++) </span><span class="identifier">PUT_TO</span><span class="plain">(</span><span class="identifier">colouring</span><span class="plain">, </span><span class="constant">EXTRACT_COLOUR</span><span class="plain">);</span>
<span class="functiontext">Formats::source_code</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="constant">0</span><span class="plain">, </span><span class="identifier">I</span><span class="string">""</span><span class="plain">, </span><span class="identifier">fragment</span><span class="plain">, </span><span class="identifier">colouring</span><span class="plain">, </span><span class="identifier">I</span><span class="string">""</span><span class="plain">, </span><span class="constant">FALSE</span><span class="plain">, </span><span class="constant">FALSE</span><span class="plain">, </span><span class="constant">TRUE</span><span class="plain">, </span><span class="constant">FALSE</span><span class="plain">);</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">colouring</span><span class="plain">);</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">INLINE_CODE_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="constant">FALSE</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::source_fragment is used in <a href="#SP27">&#167;27</a>.</p>
<p class="inwebparagraph"><a id="SP12"></a><b>&#167;12. </b>And this weaves a URL, hyperlinking it where possible.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">URL_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">URL_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">url</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">content</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">external</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::url</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">url</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">content</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">external</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Methods::provided</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">-&gt;</span><span class="identifier">methods</span><span class="plain">, </span><span class="constant">URL_FOR_MTID</span><span class="plain">)) {</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">URL_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">url</span><span class="plain">, </span><span class="identifier">content</span><span class="plain">, </span><span class="identifier">external</span><span class="plain">);</span>
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
<span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"%S"</span><span class="plain">, </span><span class="identifier">content</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::url is used in <a href="#SP27_2">&#167;27.2</a>, <a href="#SP27_4_1">&#167;27.4.1</a>, 5/hf (<a href="5-hf.html#SP10_1">&#167;10.1</a>, <a href="5-hf.html#SP10_2_1">&#167;10.2.1</a>).</p>
<p class="inwebparagraph"><a id="SP13"></a><b>&#167;13. </b>And this weaves a footnote cue.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">FOOTNOTE_CUE_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">FOOTNOTE_CUE_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">cue</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::footnote_cue</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">cue</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Methods::provided</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">-&gt;</span><span class="identifier">methods</span><span class="plain">, </span><span class="constant">FOOTNOTE_CUE_FOR_MTID</span><span class="plain">)) {</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">FOOTNOTE_CUE_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">cue</span><span class="plain">);</span>
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
<span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"[%S]"</span><span class="plain">, </span><span class="identifier">cue</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::footnote_cue is used in <a href="#SP27_3">&#167;27.3</a>.</p>
<p class="inwebparagraph"><a id="SP14"></a><b>&#167;14. </b>And this weaves a footnote text opening...
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">BEGIN_FOOTNOTE_TEXT_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">BEGIN_FOOTNOTE_TEXT_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">cue</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::begin_footnote_text</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">cue</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Methods::provided</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">-&gt;</span><span class="identifier">methods</span><span class="plain">, </span><span class="constant">BEGIN_FOOTNOTE_TEXT_FOR_MTID</span><span class="plain">)) {</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">BEGIN_FOOTNOTE_TEXT_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">cue</span><span class="plain">);</span>
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
<span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"[%S]. "</span><span class="plain">, </span><span class="identifier">cue</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::begin_footnote_text is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_8_5">&#167;1.3.4.1.8.5</a>).</p>
<p class="inwebparagraph"><a id="SP15"></a><b>&#167;15. </b>...bookended by a footnote text closing. The weaver ensures that these occur
in pairs and do not nest.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">END_FOOTNOTE_TEXT_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">END_FOOTNOTE_TEXT_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">cue</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::end_footnote_text</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">cue</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Methods::provided</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">-&gt;</span><span class="identifier">methods</span><span class="plain">, </span><span class="constant">END_FOOTNOTE_TEXT_FOR_MTID</span><span class="plain">)) {</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">END_FOOTNOTE_TEXT_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">cue</span><span class="plain">);</span>
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
<span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"\n"</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::end_footnote_text is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_8_5_1">&#167;1.3.4.1.8.5.1</a>).</p>
<p class="inwebparagraph"><a id="SP16"></a><b>&#167;16. </b>This method produces the <code class="display"><span class="extract">&gt;&gt; Example</span></code> bits of example source text, really
a convenience for Inform 7 code commentary.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">DISPLAY_LINE_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">DISPLAY_LINE_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">,</span>
<span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">from</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::display_line</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">from</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">DISPLAY_LINE_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">from</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::display_line is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_8_1">&#167;1.3.4.1.8.1</a>).</p>
<p class="inwebparagraph"><a id="SP17"></a><b>&#167;17. </b><code class="display"><span class="extract">ITEM_FOR_MTID</span></code> produces an item marker in a typical (a), (b), (c), ... sort
of list. <code class="display"><span class="extract">depth</span></code> can be 1 or 2: you can have lists in lists, but not lists in
lists in lists. <code class="display"><span class="extract">label</span></code> is the marker text, e.g., <code class="display"><span class="extract">a</span></code>, <code class="display"><span class="extract">b</span></code>, <code class="display"><span class="extract">c</span></code>, ...; it can
also be empty, in which case the method should move to the matching level of
indentation but not weave any bracketed marker.
</p>
<p class="inwebparagraph"></p>
<ul class="items"><li>(a) This was produced by <code class="display"><span class="extract">depth</span></code> equal to 1, <code class="display"><span class="extract">label</span></code> equal to <code class="display"><span class="extract">a</span></code>.
<ul class="items"><li>(i) This was produced by <code class="display"><span class="extract">depth</span></code> equal to 2, <code class="display"><span class="extract">label</span></code> equal to <code class="display"><span class="extract">i</span></code>.
</li><li>(ii) This was produced by <code class="display"><span class="extract">depth</span></code> equal to 2, <code class="display"><span class="extract">label</span></code> equal to <code class="display"><span class="extract">ii</span></code>.
</li></ul>
<li> This was produced by <code class="display"><span class="extract">depth</span></code> equal to 1, <code class="display"><span class="extract">label</span></code> empty.
</li><li>(b) This was produced by <code class="display"><span class="extract">depth</span></code> equal to 1, <code class="display"><span class="extract">label</span></code> equal to <code class="display"><span class="extract">b</span></code>.
</li></ul>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">ITEM_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">ITEM_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">depth</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">label</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::item</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">depth</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">label</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">ITEM_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">depth</span><span class="plain">, </span><span class="identifier">label</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::item is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_8_3">&#167;1.3.4.1.8.3</a>).</p>
<p class="inwebparagraph"><a id="SP18"></a><b>&#167;18. </b>The "bar" is a horizontal line across the page, but it's woven only for
very old webs nowadays. New formats really needn't implement this.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">BAR_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">BAR_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::bar</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">BAR_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::bar is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_7">&#167;1.3.4.1.7</a>).</p>
<p class="inwebparagraph"><a id="SP19"></a><b>&#167;19. </b><code class="display"><span class="extract">FIGURE_FOR_MTID</span></code> has to weave a figure, i.e., render an image in some way.
<code class="display"><span class="extract">figname</span></code> should be (the text of) a leafname within the <code class="display"><span class="extract">Figures</span></code> directory
of the web.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">FIGURE_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">FIGURE_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">figname</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">w</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">h</span><span class="plain">, </span><span class="reserved">programming_language</span><span class="plain"> *</span><span class="identifier">pl</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::figure</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">figname</span><span class="plain">,</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">w</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">h</span><span class="plain">, </span><span class="reserved">programming_language</span><span class="plain"> *</span><span class="identifier">pl</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">FIGURE_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">figname</span><span class="plain">, </span><span class="identifier">w</span><span class="plain">, </span><span class="identifier">h</span><span class="plain">, </span><span class="identifier">pl</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::figure is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_2_1">&#167;1.3.4.1.2.1</a>).</p>
<p class="inwebparagraph"><a id="SP20"></a><b>&#167;20. </b><code class="display"><span class="extract">EMBED_FOR_MTID</span></code> has to embed some Internet-sourced content. <code class="display"><span class="extract">service</span></code>
here is something like <code class="display"><span class="extract">YouTube</span></code> or <code class="display"><span class="extract">Soundcloud</span></code>, and <code class="display"><span class="extract">ID</span></code> is whatever code
that service uses to identify the video/audio in question.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">EMBED_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">EMBED_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">service</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">ID</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::embed</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">service</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">ID</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">EMBED_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">service</span><span class="plain">, </span><span class="identifier">ID</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::embed is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_2_2">&#167;1.3.4.1.2.2</a>).</p>
<p class="inwebparagraph"><a id="SP21"></a><b>&#167;21. </b>This method weaves an angle-bracketed paragraph macro name. <code class="display"><span class="extract">defn</span></code> is set
if and only if this is the place where the macro is defined &mdash; the usual
thing is to render some sort of equals sign after it, if so.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">PARA_MACRO_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">PARA_MACRO_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">para_macro</span><span class="plain"> *</span><span class="identifier">pmac</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">defn</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::para_macro</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">para_macro</span><span class="plain"> *</span><span class="identifier">pmac</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">defn</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">PARA_MACRO_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">pmac</span><span class="plain">, </span><span class="identifier">defn</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::para_macro is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_9_6">&#167;1.3.4.1.9.6</a>).</p>
<p class="inwebparagraph"><a id="SP22"></a><b>&#167;22. </b>For many formats, page breaks are meaningless, and in that case this method
should not be provided. Inweb uses them only for cosmetic benefit (and rarely
at that), so no harm is done if there's no visual indication here.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">PAGEBREAK_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">PAGEBREAK_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::pagebreak</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">PAGEBREAK_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::pagebreak is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_2">&#167;1.3.4.1.2</a>, <a href="3-tw.html#SP1_3_4_1_10_1">&#167;1.3.4.1.10.1</a>).</p>
<p class="inwebparagraph"><a id="SP23"></a><b>&#167;23. </b>"Blank line" here might better be called "vertical skip of some kind". The
following should render some kind of skip, and may want to take note of whether
this happens in commentary or in code: the <code class="display"><span class="extract">in_comment</span></code> flag provides this
information.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">BLANK_LINE_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">BLANK_LINE_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">in_comment</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::blank_line</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">in_comment</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">BLANK_LINE_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">in_comment</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::blank_line is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_8_2">&#167;1.3.4.1.8.2</a>, <a href="3-tw.html#SP1_3_4_1_9_2">&#167;1.3.4.1.9.2</a>).</p>
<p class="inwebparagraph"><a id="SP24"></a><b>&#167;24. </b>Another opportunity for vertical tidying-up. At the beginning of a code
line which occurs after a run of <code class="display"><span class="extract">@d</span></code> or <code class="display"><span class="extract">@e</span></code> definitions, this method is
called. It can then insert a little vertical gap to separate the code from
the definitions.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">AFTER_DEFINITIONS_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">AFTER_DEFINITIONS_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::after_definitions</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">AFTER_DEFINITIONS_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::after_definitions is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_9">&#167;1.3.4.1.9</a>).</p>
<p class="inwebparagraph"><a id="SP25"></a><b>&#167;25. </b>This method is called when the weaver changes "material" &mdash; for example,
from <code class="display"><span class="extract">REGULAR_MATERIAL</span></code> to <code class="display"><span class="extract">CODE_MATERIAL</span></code>. The flag <code class="display"><span class="extract">content</span></code> is set if
the line on which this happens contains some content which will then be
woven; it will be clear for blank lines, or lines intercepted by the
weaver and turned into something else (such as list items).
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">CHANGE_MATERIAL_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">CHANGE_MATERIAL_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">,</span>
<span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">old_material</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">new_material</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">content</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">plainly</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::change_material</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">old_material</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">new_material</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">content</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">plainly</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">CHANGE_MATERIAL_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">old_material</span><span class="plain">, </span><span class="identifier">new_material</span><span class="plain">,</span>
<span class="identifier">content</span><span class="plain">, </span><span class="identifier">plainly</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::change_material is used in 3/tw (<a href="3-tw.html#SP1_3_4_1_1">&#167;1.3.4.1.1</a>, <a href="3-tw.html#SP1_3_4_1_8_3">&#167;1.3.4.1.8.3</a>, <a href="3-tw.html#SP1_3_4_1_8_4">&#167;1.3.4.1.8.4</a>, <a href="3-tw.html#SP1_3_4_1_9_1">&#167;1.3.4.1.9.1</a>, <a href="3-tw.html#SP1_3_4_2">&#167;1.3.4.2</a>).</p>
<p class="inwebparagraph"><a id="SP26"></a><b>&#167;26. </b>This is called on a change of colour. "Colour" is really a shorthand way
of saying something more like "style", but seemed less ambiguous. In HTML,
this might trigger a change of CSS span style; in plain text, it would do
nothing.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">CHANGE_COLOUR_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">CHANGE_COLOUR_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">,</span>
<span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">col</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">in_code</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::change_colour</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">col</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">in_code</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">CHANGE_COLOUR_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">col</span><span class="plain">, </span><span class="identifier">in_code</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::change_colour is used in 5/tf (<a href="5-tf.html#SP8_2">&#167;8.2</a>, <a href="5-tf.html#SP15">&#167;15</a>), 5/hf (<a href="5-hf.html#SP10_3">&#167;10.3</a>).</p>
<p class="inwebparagraph"><a id="SP27"></a><b>&#167;27. </b>The following takes text, divides it up at stroke-mark boundaries &mdash;
that is, <code class="display"><span class="extract">this is inside</span></code>, this is outside &mdash; and sends contiguous pieces
of it either to <code class="display"><span class="extract">Formats::source_fragment</span></code> or <code class="display"><span class="extract">Formats::text_fragment</span></code>
as appropriate.
</p>
<pre class="display">
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::text</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">id</span><span class="plain">) {</span>
<span class="functiontext">Formats::text_r</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">id</span><span class="plain">, </span><span class="constant">FALSE</span><span class="plain">, </span><span class="constant">FALSE</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::text_comment</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">id</span><span class="plain">) {</span>
<span class="functiontext">Formats::text_r</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">id</span><span class="plain">, </span><span class="constant">FALSE</span><span class="plain">, </span><span class="constant">TRUE</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::text_r</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">id</span><span class="plain">,</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">within</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">comments</span><span class="plain">) {</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">code_in_comments_notation</span><span class="plain"> =</span>
<span class="functiontext">Bibliographic::get_datum</span><span class="plain">(</span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">weave_web</span><span class="plain">-&gt;</span><span class="element">md</span><span class="plain">,</span>
<span class="plain">(</span><span class="identifier">comments</span><span class="plain">)?(</span><span class="identifier">I</span><span class="string">"Code In Code Comments Notation"</span><span class="plain">):(</span><span class="identifier">I</span><span class="string">"Code In Commentary Notation"</span><span class="plain">));</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Str::ne</span><span class="plain">(</span><span class="identifier">code_in_comments_notation</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"Off"</span><span class="plain">)) </span>&lt;<span class="cwebmacro">Split text and code extracts</span> <span class="cwebmacronumber">27.1</span>&gt;<span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">within</span><span class="plain"> == </span><span class="constant">FALSE</span><span class="plain">) </span>&lt;<span class="cwebmacro">Recognose hyperlinks</span> <span class="cwebmacronumber">27.2</span>&gt;<span class="plain">;</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">xref_notation</span><span class="plain"> = </span><span class="functiontext">Bibliographic::get_datum</span><span class="plain">(</span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">weave_web</span><span class="plain">-&gt;</span><span class="element">md</span><span class="plain">,</span>
<span class="identifier">I</span><span class="string">"Cross-References Notation"</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Str::ne</span><span class="plain">(</span><span class="identifier">xref_notation</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"Off"</span><span class="plain">)) </span>&lt;<span class="cwebmacro">Recognise cross-references</span> <span class="cwebmacronumber">27.4</span>&gt;<span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">within</span><span class="plain">) {</span>
<span class="functiontext">Formats::source_fragment</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">id</span><span class="plain">);</span>
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
&lt;<span class="cwebmacro">Detect use of footnotes</span> <span class="cwebmacronumber">27.3</span>&gt;<span class="plain">;</span>
<span class="functiontext">Formats::text_fragment</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">id</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::text is used in 2/tgs (<a href="2-tgs.html#SP7">&#167;7</a>, <a href="2-tgs.html#SP7_1">&#167;7.1</a>), 3/tw (<a href="3-tw.html#SP1_3_4_1_8">&#167;1.3.4.1.8</a>, <a href="3-tw.html#SP1_3_4_1_8_4">&#167;1.3.4.1.8.4</a>, <a href="3-tw.html#SP1_3_4_1_10_5">&#167;1.3.4.1.10.5</a>, <a href="3-tw.html#SP2_1">&#167;2.1</a>, <a href="3-tw.html#SP2_2">&#167;2.2</a>, <a href="3-tw.html#SP2_2_1">&#167;2.2.1</a>, <a href="3-tw.html#SP2_3">&#167;2.3</a>), 5/ptf (<a href="5-ptf.html#SP3">&#167;3</a>), 5/tf (<a href="5-tf.html#SP4">&#167;4</a>), 5/hf (<a href="5-hf.html#SP7">&#167;7</a>).</p>
<p class="endnote">The function Formats::text_comment is used in 5/tf (<a href="5-tf.html#SP24_2">&#167;24.2</a>), 5/hf (<a href="5-hf.html#SP10">&#167;10</a>).</p>
<p class="endnote">The function Formats::text_r is used in <a href="#SP27_1">&#167;27.1</a>, <a href="#SP27_2">&#167;27.2</a>, <a href="#SP27_3">&#167;27.3</a>, <a href="#SP27_4_1">&#167;27.4.1</a>.</p>
<p class="inwebparagraph"><a id="SP27_1"></a><b>&#167;27.1. </b><code class="display">
&lt;<span class="cwebmacrodefn">Split text and code extracts</span> <span class="cwebmacronumber">27.1</span>&gt; =
</code></p>
<pre class="displaydefn">
<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"> &lt; </span><span class="functiontext">Str::len</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">); </span><span class="identifier">i</span><span class="plain">++) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Str::get_at</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">) == </span><span class="character">'\\'</span><span class="plain">) </span><span class="identifier">i</span><span class="plain"> += </span><span class="functiontext">Str::len</span><span class="plain">(</span><span class="identifier">code_in_comments_notation</span><span class="plain">) - </span><span class="constant">1</span><span class="plain">;</span>
<span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Str::includes_at</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">, </span><span class="identifier">code_in_comments_notation</span><span class="plain">)) {</span>
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">before</span><span class="plain">);</span>
<span class="functiontext">Str::copy</span><span class="plain">(</span><span class="identifier">before</span><span class="plain">, </span><span class="identifier">id</span><span class="plain">); </span><span class="functiontext">Str::truncate</span><span class="plain">(</span><span class="identifier">before</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">);</span>
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">after</span><span class="plain">);</span>
<span class="functiontext">Str::substr</span><span class="plain">(</span><span class="identifier">after</span><span class="plain">, </span><span class="functiontext">Str::at</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">,</span>
<span class="identifier">i</span><span class="plain"> + </span><span class="functiontext">Str::len</span><span class="plain">(</span><span class="identifier">code_in_comments_notation</span><span class="plain">)), </span><span class="functiontext">Str::end</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">));</span>
<span class="functiontext">Formats::text_r</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">before</span><span class="plain">, </span><span class="identifier">within</span><span class="plain">, </span><span class="identifier">comments</span><span class="plain">);</span>
<span class="functiontext">Formats::text_r</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">after</span><span class="plain">, (</span><span class="identifier">within</span><span class="plain">)?</span><span class="identifier">FALSE:TRUE</span><span class="plain">, </span><span class="identifier">comments</span><span class="plain">);</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">before</span><span class="plain">);</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">after</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">This code is used in <a href="#SP27">&#167;27</a>.</p>
<p class="inwebparagraph"><a id="SP27_2"></a><b>&#167;27.2. </b><code class="display">
&lt;<span class="cwebmacrodefn">Recognose hyperlinks</span> <span class="cwebmacronumber">27.2</span>&gt; =
</code></p>
<pre class="displaydefn">
<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"> &lt; </span><span class="functiontext">Str::len</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">); </span><span class="identifier">i</span><span class="plain">++) {</span>
<span class="reserved">if</span><span class="plain"> ((</span><span class="functiontext">Str::includes_at</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"http://"</span><span class="plain">)) ||</span>
<span class="plain">(</span><span class="functiontext">Str::includes_at</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"https://"</span><span class="plain">))) {</span>
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">before</span><span class="plain">);</span>
<span class="functiontext">Str::copy</span><span class="plain">(</span><span class="identifier">before</span><span class="plain">, </span><span class="identifier">id</span><span class="plain">); </span><span class="functiontext">Str::truncate</span><span class="plain">(</span><span class="identifier">before</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">);</span>
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">after</span><span class="plain">);</span>
<span class="functiontext">Str::substr</span><span class="plain">(</span><span class="identifier">after</span><span class="plain">, </span><span class="functiontext">Str::at</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">), </span><span class="functiontext">Str::end</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">));</span>
<span class="reserved">match_results</span><span class="plain"> </span><span class="identifier">mr</span><span class="plain"> = </span><span class="functiontext">Regexp::create_mr</span><span class="plain">();</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Regexp::match</span><span class="plain">(&amp;</span><span class="identifier">mr</span><span class="plain">, </span><span class="identifier">after</span><span class="plain">, </span><span class="identifier">L</span><span class="string">"(https*://%C+)(%c*)"</span><span class="plain">)) {</span>
<span class="functiontext">Formats::text_r</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">before</span><span class="plain">, </span><span class="identifier">within</span><span class="plain">, </span><span class="identifier">comments</span><span class="plain">);</span>
<span class="functiontext">Formats::url</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">mr</span><span class="plain">.</span><span class="element">exp</span><span class="plain">[0], </span><span class="identifier">mr</span><span class="plain">.</span><span class="element">exp</span><span class="plain">[0], </span><span class="constant">TRUE</span><span class="plain">);</span>
<span class="functiontext">Formats::text_r</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">mr</span><span class="plain">.</span><span class="element">exp</span><span class="plain">[1], </span><span class="identifier">within</span><span class="plain">, </span><span class="identifier">comments</span><span class="plain">);</span>
<span class="functiontext">Regexp::dispose_of</span><span class="plain">(&amp;</span><span class="identifier">mr</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="functiontext">Regexp::dispose_of</span><span class="plain">(&amp;</span><span class="identifier">mr</span><span class="plain">);</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">before</span><span class="plain">);</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">after</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">This code is used in <a href="#SP27">&#167;27</a>.</p>
<p class="inwebparagraph"><a id="SP27_3"></a><b>&#167;27.3. </b><code class="display">
&lt;<span class="cwebmacrodefn">Detect use of footnotes</span> <span class="cwebmacronumber">27.3</span>&gt; =
</code></p>
<pre class="displaydefn">
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">before</span><span class="plain">);</span>
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">cue</span><span class="plain">);</span>
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">after</span><span class="plain">);</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">allow</span><span class="plain"> = </span><span class="constant">FALSE</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Parser::detect_footnote</span><span class="plain">(</span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">weave_web</span><span class="plain">, </span><span class="identifier">id</span><span class="plain">, </span><span class="identifier">before</span><span class="plain">, </span><span class="identifier">cue</span><span class="plain">, </span><span class="identifier">after</span><span class="plain">)) {</span>
<span class="identifier">allow</span><span class="plain"> = </span><span class="constant">TRUE</span><span class="plain">;</span>
<span class="functiontext">Formats::text_r</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">before</span><span class="plain">, </span><span class="identifier">within</span><span class="plain">, </span><span class="identifier">comments</span><span class="plain">);</span>
<span class="functiontext">Formats::footnote_cue</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">cue</span><span class="plain">);</span>
<span class="functiontext">Formats::text_r</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">after</span><span class="plain">, </span><span class="identifier">within</span><span class="plain">, </span><span class="identifier">comments</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">before</span><span class="plain">);</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">cue</span><span class="plain">);</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">after</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">allow</span><span class="plain">) </span><span class="reserved">return</span><span class="plain">;</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">This code is used in <a href="#SP27">&#167;27</a>.</p>
<p class="inwebparagraph"><a id="SP27_4"></a><b>&#167;27.4. </b><code class="display">
&lt;<span class="cwebmacrodefn">Recognise cross-references</span> <span class="cwebmacronumber">27.4</span>&gt; =
</code></p>
<pre class="displaydefn">
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">N</span><span class="plain"> = </span><span class="functiontext">Str::len</span><span class="plain">(</span><span class="identifier">xref_notation</span><span class="plain">);</span>
<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"> &lt; </span><span class="functiontext">Str::len</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">); </span><span class="identifier">i</span><span class="plain">++) {</span>
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">within</span><span class="plain"> == </span><span class="constant">FALSE</span><span class="plain">) &amp;&amp; (</span><span class="functiontext">Str::includes_at</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">, </span><span class="identifier">xref_notation</span><span class="plain">))) {</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">j</span><span class="plain"> = </span><span class="identifier">i</span><span class="plain"> + </span><span class="identifier">N</span><span class="plain">+1;</span>
<span class="reserved">while</span><span class="plain"> (</span><span class="identifier">j</span><span class="plain"> &lt; </span><span class="functiontext">Str::len</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">)) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Str::includes_at</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">, </span><span class="identifier">j</span><span class="plain">, </span><span class="identifier">xref_notation</span><span class="plain">)) {</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">allow</span><span class="plain"> = </span><span class="constant">FALSE</span><span class="plain">;</span>
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">before</span><span class="plain">);</span>
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">reference</span><span class="plain">);</span>
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">after</span><span class="plain">);</span>
<span class="functiontext">Str::substr</span><span class="plain">(</span><span class="identifier">before</span><span class="plain">, </span><span class="functiontext">Str::start</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">), </span><span class="functiontext">Str::at</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">));</span>
<span class="functiontext">Str::substr</span><span class="plain">(</span><span class="identifier">reference</span><span class="plain">, </span><span class="functiontext">Str::at</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">, </span><span class="identifier">i</span><span class="plain"> + </span><span class="identifier">N</span><span class="plain">), </span><span class="functiontext">Str::at</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">, </span><span class="identifier">j</span><span class="plain">));</span>
<span class="functiontext">Str::substr</span><span class="plain">(</span><span class="identifier">after</span><span class="plain">, </span><span class="functiontext">Str::at</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">, </span><span class="identifier">j</span><span class="plain"> + </span><span class="identifier">N</span><span class="plain">), </span><span class="functiontext">Str::end</span><span class="plain">(</span><span class="identifier">id</span><span class="plain">));</span>
&lt;<span class="cwebmacro">Attempt to resolve the cross-reference</span> <span class="cwebmacronumber">27.4.1</span>&gt;<span class="plain">;</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">before</span><span class="plain">);</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">reference</span><span class="plain">);</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">after</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">allow</span><span class="plain">) </span><span class="reserved">return</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="identifier">j</span><span class="plain">++;</span>
<span class="plain">}</span>
<span class="plain">}</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">This code is used in <a href="#SP27">&#167;27</a>.</p>
<p class="inwebparagraph"><a id="SP27_4_1"></a><b>&#167;27.4.1. </b><code class="display">
&lt;<span class="cwebmacrodefn">Attempt to resolve the cross-reference</span> <span class="cwebmacronumber">27.4.1</span>&gt; =
</code></p>
<pre class="displaydefn">
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">url</span><span class="plain">);</span>
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">title</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Formats::resolve_reference_in_weave</span><span class="plain">(</span><span class="identifier">url</span><span class="plain">, </span><span class="identifier">title</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">reference</span><span class="plain">,</span>
<span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">current_weave_line</span><span class="plain">)) {</span>
<span class="functiontext">Formats::text_r</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">before</span><span class="plain">, </span><span class="identifier">within</span><span class="plain">, </span><span class="identifier">comments</span><span class="plain">);</span>
<span class="functiontext">Formats::url</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">url</span><span class="plain">, </span><span class="identifier">title</span><span class="plain">, </span><span class="constant">FALSE</span><span class="plain">);</span>
<span class="functiontext">Formats::text_r</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">after</span><span class="plain">, </span><span class="identifier">within</span><span class="plain">, </span><span class="identifier">comments</span><span class="plain">);</span>
<span class="identifier">allow</span><span class="plain"> = </span><span class="constant">TRUE</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">url</span><span class="plain">);</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">title</span><span class="plain">);</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">This code is used in <a href="#SP27_4">&#167;27.4</a>.</p>
<p class="inwebparagraph"><a id="SP28"></a><b>&#167;28. </b>The following must decide what a reference like "Chapter 3" should refer
to: that is, whether it makes unamgiguous sense, and if so, what URL we should
link to, and what the full text of the link might be.
</p>
<pre class="display">
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Formats::resolve_reference_in_weave</span><span class="plain">(</span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">url</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">title</span><span class="plain">,</span>
<span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">text</span><span class="plain">, </span><span class="reserved">source_line</span><span class="plain"> *</span><span class="identifier">L</span><span class="plain">) {</span>
<span class="reserved">module</span><span class="plain"> *</span><span class="identifier">found_M</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="reserved">section_md</span><span class="plain"> *</span><span class="identifier">found_Sm</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">named_as_module</span><span class="plain"> = </span><span class="constant">FALSE</span><span class="plain">;</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">N</span><span class="plain"> = </span><span class="functiontext">WebModules::named_reference</span><span class="plain">(&amp;</span><span class="identifier">found_M</span><span class="plain">, &amp;</span><span class="identifier">found_Sm</span><span class="plain">, &amp;</span><span class="identifier">named_as_module</span><span class="plain">,</span>
<span class="identifier">title</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="identifier">weave_web</span><span class="plain">-&gt;</span><span class="element">md</span><span class="plain">-&gt;</span><span class="element">as_module</span><span class="plain">, </span><span class="identifier">text</span><span class="plain">, </span><span class="constant">FALSE</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">N</span><span class="plain"> == </span><span class="constant">0</span><span class="plain">) {</span>
<span class="functiontext">Main::error_in_web</span><span class="plain">(</span><span class="identifier">I</span><span class="string">"No section has this name"</span><span class="plain">, </span><span class="identifier">L</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain"> </span><span class="constant">FALSE</span><span class="plain">;</span>
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">N</span><span class="plain"> &gt; </span><span class="constant">1</span><span class="plain">) {</span>
<span class="functiontext">Main::error_in_web</span><span class="plain">(</span><span class="identifier">I</span><span class="string">"Multiple sections might be meant here"</span><span class="plain">, </span><span class="identifier">L</span><span class="plain">);</span>
<span class="functiontext">WebModules::named_reference</span><span class="plain">(&amp;</span><span class="identifier">found_M</span><span class="plain">, &amp;</span><span class="identifier">found_Sm</span><span class="plain">, &amp;</span><span class="identifier">named_as_module</span><span class="plain">,</span>
<span class="identifier">title</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="identifier">weave_web</span><span class="plain">-&gt;</span><span class="element">md</span><span class="plain">-&gt;</span><span class="element">as_module</span><span class="plain">, </span><span class="identifier">text</span><span class="plain">, </span><span class="constant">TRUE</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain"> </span><span class="constant">FALSE</span><span class="plain">;</span>
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
<span class="reserved">chapter</span><span class="plain"> *</span><span class="identifier">C</span><span class="plain">;</span>
<span class="reserved">section</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain">, *</span><span class="identifier">found_S</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="identifier">LOOP_OVER_LINKED_LIST</span><span class="plain">(</span><span class="identifier">C</span><span class="plain">, </span><span class="reserved">chapter</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">weave_web</span><span class="plain">-&gt;</span><span class="element">chapters</span><span class="plain">)</span>
<span class="identifier">LOOP_OVER_LINKED_LIST</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">, </span><span class="reserved">section</span><span class="plain">, </span><span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">sections</span><span class="plain">)</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">S</span><span class="plain">-&gt;</span><span class="element">md</span><span class="plain"> == </span><span class="identifier">found_Sm</span><span class="plain">) </span><span class="identifier">found_S</span><span class="plain"> = </span><span class="identifier">S</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">found_S</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="identifier">internal_error</span><span class="plain">(</span><span class="string">"could not locate S"</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">found_M</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="identifier">internal_error</span><span class="plain">(</span><span class="string">"could not locate M"</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">found_M</span><span class="plain"> != </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">weave_web</span><span class="plain">-&gt;</span><span class="element">md</span><span class="plain">-&gt;</span><span class="element">as_module</span><span class="plain">) {</span>
<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">url</span><span class="plain">, </span><span class="string">"../%S-module/"</span><span class="plain">, </span><span class="identifier">found_M</span><span class="plain">-&gt;</span><span class="element">module_name</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="functiontext">HTMLFormat::section_URL</span><span class="plain">(</span><span class="identifier">url</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">found_S</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">named_as_module</span><span class="plain"> == </span><span class="constant">FALSE</span><span class="plain">) &amp;&amp; (</span><span class="identifier">found_M</span><span class="plain"> != </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">weave_web</span><span class="plain">-&gt;</span><span class="element">md</span><span class="plain">-&gt;</span><span class="element">as_module</span><span class="plain">)) {</span>
<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">title</span><span class="plain">, </span><span class="string">" (in %S)"</span><span class="plain">, </span><span class="identifier">found_M</span><span class="plain">-&gt;</span><span class="element">module_name</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="reserved">return</span><span class="plain"> </span><span class="constant">TRUE</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::resolve_reference_in_weave is used in <a href="#SP27_4_1">&#167;27.4.1</a>, 5/hf (<a href="5-hf.html#SP10_2_1">&#167;10.2.1</a>).</p>
<p class="inwebparagraph"><a id="SP29"></a><b>&#167;29. </b><code class="display"><span class="extract">COMMENTARY_TEXT_FOR_MTID</span></code> straightforwardly weaves out a run of contiguous
text. Ordinarily, any formulae written in TeX notation (i.e., in dollar signs
used as brackets) will be transmogrified into a plain text paraphrase, but
the <code class="display"><span class="extract">PRESERVE_MATH_MODE_FOR_MTID</span></code> can prevent this. (And of course the TeX
format does, because it wants to keep the formulae in all their glory.)
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">COMMENTARY_TEXT_FOR_MTID</span>
<span class="definitionkeyword">enum</span> <span class="constant">PRESERVE_MATH_MODE_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">IMETHOD_TYPE</span><span class="plain">(</span><span class="constant">PRESERVE_MATH_MODE_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">matter</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">id</span><span class="plain">)</span>
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">COMMENTARY_TEXT_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">,</span>
<span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">matter</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::text_fragment</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">fragment</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">matter</span><span class="plain">);</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">rv</span><span class="plain"> = </span><span class="constant">TRUE</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Str::eq_wide_string</span><span class="plain">(</span>
<span class="functiontext">Bibliographic::get_datum</span><span class="plain">(</span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">weave_web</span><span class="plain">-&gt;</span><span class="element">md</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"TeX Mathematics Notation"</span><span class="plain">), </span><span class="identifier">L</span><span class="string">"On"</span><span class="plain">)) {</span>
<span class="identifier">rv</span><span class="plain"> = </span><span class="constant">FALSE</span><span class="plain">;</span>
<span class="identifier">IMETHOD_CALL</span><span class="plain">(</span><span class="identifier">rv</span><span class="plain">, </span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">PRESERVE_MATH_MODE_FOR_MTID</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">matter</span><span class="plain">, </span><span class="identifier">fragment</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">rv</span><span class="plain"> == </span><span class="constant">FALSE</span><span class="plain">) </span><span class="functiontext">TeX::remove_math_mode</span><span class="plain">(</span><span class="identifier">matter</span><span class="plain">, </span><span class="identifier">fragment</span><span class="plain">);</span>
<span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Str::len</span><span class="plain">(</span><span class="identifier">matter</span><span class="plain">) == </span><span class="constant">0</span><span class="plain">) </span><span class="functiontext">Str::copy</span><span class="plain">(</span><span class="identifier">matter</span><span class="plain">, </span><span class="identifier">fragment</span><span class="plain">);</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">COMMENTARY_TEXT_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">matter</span><span class="plain">);</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">matter</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::text_fragment is used in <a href="#SP27">&#167;27</a>.</p>
<p class="inwebparagraph"><a id="SP30"></a><b>&#167;30. </b>The weaver has special typographical support for the stand-alone Inform
document of Preform grammar, and this is the hook for it. Most formats
should ignore it.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">PREFORM_DOCUMENT_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">IMETHOD_TYPE</span><span class="plain">(</span><span class="constant">PREFORM_DOCUMENT_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">,</span>
<span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">web</span><span class="plain"> *</span><span class="identifier">W</span><span class="plain">, </span><span class="reserved">chapter</span><span class="plain"> *</span><span class="identifier">C</span><span class="plain">, </span><span class="reserved">section</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain">, </span><span class="reserved">source_line</span><span class="plain"> *</span><span class="identifier">L</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">matter</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">concluding_comment</span><span class="plain">)</span>
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Formats::preform_document</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">web</span><span class="plain"> *</span><span class="identifier">W</span><span class="plain">,</span>
<span class="reserved">chapter</span><span class="plain"> *</span><span class="identifier">C</span><span class="plain">, </span><span class="reserved">section</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain">, </span><span class="reserved">source_line</span><span class="plain"> *</span><span class="identifier">L</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">matter</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">concluding_comment</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">rv</span><span class="plain"> = </span><span class="constant">FALSE</span><span class="plain">;</span>
<span class="identifier">IMETHOD_CALL</span><span class="plain">(</span><span class="identifier">rv</span><span class="plain">, </span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">PREFORM_DOCUMENT_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">W</span><span class="plain">, </span><span class="identifier">C</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">, </span><span class="identifier">L</span><span class="plain">, </span><span class="identifier">matter</span><span class="plain">,</span>
<span class="identifier">concluding_comment</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">rv</span><span class="plain">;</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::preform_document is used in 4/is (<a href="4-is.html#SP16">&#167;16</a>).</p>
<p class="inwebparagraph"><a id="SP31"></a><b>&#167;31. </b>When the weaver adds one of its endnotes &mdash; "This function is used in...",
or some such &mdash; it calls this method twice, once before the start, with
<code class="display"><span class="extract">end</span></code> set to 1, and once after the end, with <code class="display"><span class="extract">end</span></code> set to 2.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">ENDNOTE_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">ENDNOTE_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">end</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::endnote</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">end</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">ENDNOTE_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">end</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::endnote is used in 2/tgs (<a href="2-tgs.html#SP7">&#167;7</a>, <a href="2-tgs.html#SP7_1">&#167;7.1</a>), 3/tw (<a href="3-tw.html#SP2_1">&#167;2.1</a>, <a href="3-tw.html#SP2_2">&#167;2.2</a>, <a href="3-tw.html#SP2_3">&#167;2.3</a>).</p>
<p class="inwebparagraph"><a id="SP32"></a><b>&#167;32. </b>"Locale" here isn't used in the Unix sense. It means text which describes
a range of numbered paragraphs, from <code class="display"><span class="extract">par1</span></code> to <code class="display"><span class="extract">par2</span></code>, though <code class="display"><span class="extract">par2</span></code> can
instead be null, in which case the description is of just one para. (This
is often used in endnotes.)
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">LOCALE_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">LOCALE_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">paragraph</span><span class="plain"> *</span><span class="identifier">par1</span><span class="plain">, </span><span class="reserved">paragraph</span><span class="plain"> *</span><span class="identifier">par2</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::locale</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">paragraph</span><span class="plain"> *</span><span class="identifier">par1</span><span class="plain">, </span><span class="reserved">paragraph</span><span class="plain"> *</span><span class="identifier">par2</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">LOCALE_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">par1</span><span class="plain">, </span><span class="identifier">par2</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::locale is used in 3/tw (<a href="3-tw.html#SP2_1">&#167;2.1</a>, <a href="3-tw.html#SP2_2_1">&#167;2.2.1</a>), 5/ptf (<a href="5-ptf.html#SP6">&#167;6</a>).</p>
<p class="inwebparagraph"><a id="SP33"></a><b>&#167;33. </b>And finally: the bottom of the woven file. The <code class="display"><span class="extract">comment</span></code> is, again, not
intended for human eyes, and will be some sort of "End of weave" remark.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">TAIL_FOR_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">TAIL_FOR_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">comment</span><span class="plain">, </span><span class="reserved">section</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::tail</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">comment</span><span class="plain">, </span><span class="reserved">section</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">;</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">TAIL_FOR_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">comment</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::tail is used in 3/tw (<a href="3-tw.html#SP1_5">&#167;1.5</a>).</p>
<p class="inwebparagraph"><a id="SP34"></a><b>&#167;34. Post-processing. </b>Consider what happens when Inweb makes a PDF, via TeX. The initial weave is
to a TeX file; it's then "post-processing" which will turn this into a PDF.
The following method calls allow such two-stage formats to function; in
this case, it would be the PDF format which provides the necessary methods
to turn TeX into PDF. The important method is this one:
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">POST_PROCESS_POS_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">POST_PROCESS_POS_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">open_afterwards</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::post_process_weave</span><span class="plain">(</span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">open_afterwards</span><span class="plain">) {</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">, </span><span class="constant">POST_PROCESS_POS_MTID</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">open_afterwards</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::post_process_weave is used in 3/ts (<a href="3-ts.html#SP2">&#167;2</a>).</p>
<p class="inwebparagraph"><a id="SP35"></a><b>&#167;35. </b>Optionally, a fancy report can be printed out, to describe what has been
done:
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">POST_PROCESS_REPORT_POS_MTID</span>
</pre>
<pre class="display">
<span class="identifier">VMETHOD_TYPE</span><span class="plain">(</span><span class="constant">POST_PROCESS_REPORT_POS_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">)</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Formats::report_on_post_processing</span><span class="plain">(</span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">) {</span>
<span class="identifier">VMETHOD_CALL</span><span class="plain">(</span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">, </span><span class="constant">POST_PROCESS_REPORT_POS_MTID</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::report_on_post_processing is used in 3/ts (<a href="3-ts.html#SP2_3">&#167;2.3</a>).</p>
<p class="inwebparagraph"><a id="SP36"></a><b>&#167;36. </b>After post-processing, an index file is sometimes needed. For example, if a
big web is woven to a swarm of PDFs, one for each section, then we also want
to make an index page in HTML which provides annotated links to those PDFs.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">INDEX_PDFS_POS_MTID</span>
</pre>
<pre class="display">
<span class="identifier">IMETHOD_TYPE</span><span class="plain">(</span><span class="constant">INDEX_PDFS_POS_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">)</span>
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Formats::index_pdfs</span><span class="plain">(</span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">format</span><span class="plain">) {</span>
<span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain"> = </span><span class="functiontext">Formats::find_by_name</span><span class="plain">(</span><span class="identifier">format</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">wf</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">FALSE</span><span class="plain">;</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">rv</span><span class="plain"> = </span><span class="constant">FALSE</span><span class="plain">;</span>
<span class="identifier">IMETHOD_CALLV</span><span class="plain">(</span><span class="identifier">rv</span><span class="plain">, </span><span class="identifier">wf</span><span class="plain">, </span><span class="constant">INDEX_PDFS_POS_MTID</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">rv</span><span class="plain">;</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::index_pdfs appears nowhere else.</p>
<p class="inwebparagraph"><a id="SP37"></a><b>&#167;37. </b>And in that index file, we may want to substitute in values for placeholder
text like <code class="display"><span class="extract">[[PDF Size]]</span></code> in the template file. This is the <code class="display"><span class="extract">detail</span></code>.
</p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">POST_PROCESS_SUBSTITUTE_POS_MTID</span>
</pre>
<pre class="display">
<span class="identifier">IMETHOD_TYPE</span><span class="plain">(</span><span class="constant">POST_PROCESS_SUBSTITUTE_POS_MTID</span><span class="plain">, </span><span class="reserved">weave_format</span><span class="plain"> *</span><span class="identifier">wf</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">OUT</span><span class="plain">,</span>
<span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">detail</span><span class="plain">, </span><span class="reserved">weave_pattern</span><span class="plain"> *</span><span class="identifier">pattern</span><span class="plain">)</span>
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Formats::substitute_post_processing_data</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">weave_target</span><span class="plain"> *</span><span class="identifier">wv</span><span class="plain">,</span>
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">detail</span><span class="plain">, </span><span class="reserved">weave_pattern</span><span class="plain"> *</span><span class="identifier">pattern</span><span class="plain">) {</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">rv</span><span class="plain"> = </span><span class="constant">FALSE</span><span class="plain">;</span>
<span class="identifier">IMETHOD_CALL</span><span class="plain">(</span><span class="identifier">rv</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">-&gt;</span><span class="element">format</span><span class="plain">, </span><span class="constant">POST_PROCESS_SUBSTITUTE_POS_MTID</span><span class="plain">, </span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">wv</span><span class="plain">, </span><span class="identifier">detail</span><span class="plain">, </span><span class="identifier">pattern</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">rv</span><span class="plain">;</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Formats::substitute_post_processing_data is used in 3/ti (<a href="3-ti.html#SP5_1_8_2">&#167;5.1.8.2</a>, <a href="3-ti.html#SP5_1_8_3">&#167;5.1.8.3</a>, <a href="3-ti.html#SP5_1_8_4">&#167;5.1.8.4</a>).</p>
<hr class="tocbar">
<ul class="toc"><li><i>(This section begins Chapter 5: Formats.)</i></li><li><a href="5-ptf.html">Continue with 'Plain Text Format'</a></li></ul><hr class="tocbar">
<!--End of weave-->
</main>
</body>
</html>