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174 lines
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<title>Codename Unsigned</title>
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<link href="../docs-assets/Breadcrumbs.css" rel="stylesheet" rev="stylesheet" type="text/css">
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<meta name="viewport" content="width=device-width initial-scale=1">
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<link href="../docs-assets/Popups.css" rel="stylesheet" rev="stylesheet" type="text/css">
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<h1><a href="../index.html">
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<img src="../docs-assets/Inform.png" height=72">
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</a></h1>
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<ul><li><a href="../compiler.html">compiler tools</a></li>
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<li><a href="../other.html">other tools</a></li>
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<li><a href="../extensions.html">extensions and kits</a></li>
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<li><a href="../units.html">unit test tools</a></li>
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</ul><h2>Other Tools</h2><ul>
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<li><a href="../inblorb/index.html">inblorb</a></li>
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<li><a href="index.html"><span class="selectedlink">indoc</span></a></li>
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<li><a href="../inpolicy/index.html">inpolicy</a></li>
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<li><a href="../inrtps/index.html">inrtps</a></li>
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</ul><h2>Foundation</h2><ul>
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<li><a href="../../../inweb/docs/foundation-module/index.html">foundation</a></li>
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</ul>
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<main role="main">
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<!--Weave of 'Codename Unsigned' generated by Inweb-->
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<div class="breadcrumbs">
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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../other.html">Other Tools</a></li><li><a href="index.html">indoc</a></li><li><a href="index.html#4">Chapter 4: Navigation Styles</a></li><li><b>Codename Unsigned</b></li></ul></div>
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<p class="purpose">The "unsigned" style of navigational gadgets.</p>
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<ul class="toc"><li><a href="4-cu.html#SP1">§1. Creation</a></li><li><a href="4-cu.html#SP2">§2. Top</a></li><li><a href="4-cu.html#SP5">§5. Index top</a></li><li><a href="4-cu.html#SP6">§6. Middle</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. Creation. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">navigation_design</span><span class="plain-syntax"> *</span><span class="function-syntax">Unsigned::create</span><button class="popup" onclick="togglePopup('usagePopup1')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup1">Usage of <span class="code-font"><span class="function-syntax">Unsigned::create</span></span>:<br/>Navigational Designs - <a href="4-nd.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">navigation_design</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ND</span><span class="plain-syntax"> = </span><a href="4-nd.html#SP1" class="function-link"><span class="function-syntax">Nav::new</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="string-syntax">"unsigned"</span><span class="plain-syntax">, </span><span class="constant-syntax">TRUE</span><span class="plain-syntax">, </span><span class="constant-syntax">FALSE</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">ND</span><span class="plain-syntax">, </span><span class="constant-syntax">RENDER_VOLUME_TITLE_MTID</span><span class="plain-syntax">, </span><a href="4-cu.html#SP2" class="function-link"><span class="function-syntax">Unsigned::unsigned_volume_title</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">ND</span><span class="plain-syntax">, </span><span class="constant-syntax">RENDER_CHAPTER_TITLE_MTID</span><span class="plain-syntax">, </span><a href="4-cu.html#SP3" class="function-link"><span class="function-syntax">Unsigned::unsigned_chapter_title</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">ND</span><span class="plain-syntax">, </span><span class="constant-syntax">RENDER_SECTION_TITLE_MTID</span><span class="plain-syntax">, </span><a href="4-cu.html#SP4" class="function-link"><span class="function-syntax">Unsigned::unsigned_section_title</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">ND</span><span class="plain-syntax">, </span><span class="constant-syntax">RENDER_INDEX_TOP_MTID</span><span class="plain-syntax">, </span><a href="4-cu.html#SP5" class="function-link"><span class="function-syntax">Unsigned::unsigned_navigation_index_top</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">ND</span><span class="plain-syntax">, </span><span class="constant-syntax">RENDER_NAV_MIDDLE_MTID</span><span class="plain-syntax">, </span><a href="4-cu.html#SP6" class="function-link"><span class="function-syntax">Unsigned::unsigned_navigation_middle</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ND</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. Top. </b>At the front end of a section, before any of its text.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Unsigned::unsigned_volume_title</span><button class="popup" onclick="togglePopup('usagePopup2')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup2">Usage of <span class="code-font"><span class="function-syntax">Unsigned::unsigned_volume_title</span></span>:<br/><a href="4-cu.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">navigation_design</span><span class="plain-syntax"> *</span><span class="identifier-syntax">self</span><span class="plain-syntax">, </span><span class="reserved-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="reserved-syntax">volume</span><span class="plain-syntax"> *</span><span class="identifier-syntax">V</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-cu.html#SP2_1" class="named-paragraph-link"><span class="named-paragraph">Render a volume heading</span><span class="named-paragraph-number">2.1</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-cu.html#SP2_2" class="named-paragraph-link"><span class="named-paragraph">Render a chapter-contents table</span><span class="named-paragraph-number">2.2</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP2_1" class="paragraph-anchor"></a><b>§2.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Render a volume heading</span><span class="named-paragraph-number">2.1</span></span><span class="comment-syntax"> =</span>
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">partn</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">no_volumes</span><span class="plain-syntax"> > </span><span class="constant-syntax">1</span><span class="plain-syntax">) </span><a href="4-cr.html#SP12" class="function-link"><span class="function-syntax">Roadsign::roman_numeral</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">partn</span><span class="plain-syntax">, </span><span class="identifier-syntax">V</span><span class="plain-syntax">-></span><span class="element-syntax">allocation_id</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_OPEN_WITH</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">, </span><span class="string-syntax">"class=\"volumeheading\""</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%S%S"</span><span class="plain-syntax">, </span><span class="identifier-syntax">partn</span><span class="plain-syntax">, </span><span class="identifier-syntax">V</span><span class="plain-syntax">-></span><span class="element-syntax">vol_title</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">);</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="4-cu.html#SP2">§2</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP2_2" class="paragraph-anchor"></a><b>§2.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Render a chapter-contents table</span><span class="named-paragraph-number">2.2</span></span><span class="comment-syntax"> =</span>
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">nch</span><span class="plain-syntax"> = </span><span class="identifier-syntax">V</span><span class="plain-syntax">-></span><span class="element-syntax">vol_chapter_count</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">rc</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">rc</span><span class="plain-syntax"> < </span><span class="identifier-syntax">nch</span><span class="plain-syntax">; </span><span class="identifier-syntax">rc</span><span class="plain-syntax">++) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">chapter</span><span class="plain-syntax"> *</span><span class="identifier-syntax">C</span><span class="plain-syntax"> = </span><span class="identifier-syntax">V</span><span class="plain-syntax">-></span><span class="element-syntax">chapters</span><span class="plain-syntax">[</span><span class="identifier-syntax">rc</span><span class="plain-syntax">];</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_OPEN</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="../../../inweb/docs/foundation-module/5-htm.html#SP17" class="function-link"><span class="function-syntax">HTML::begin_link_with_class</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"standardlink"</span><span class="plain-syntax">, </span><span class="identifier-syntax">C</span><span class="plain-syntax">-></span><span class="element-syntax">chapter_URL</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_OPEN_WITH</span><span class="plain-syntax">(</span><span class="string-syntax">"span"</span><span class="plain-syntax">, </span><span class="string-syntax">"class=\"chapterlisting\""</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%S"</span><span class="plain-syntax">, </span><span class="identifier-syntax">C</span><span class="plain-syntax">-></span><span class="element-syntax">chapter_full_title</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"span"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="../../../inweb/docs/foundation-module/5-htm.html#SP17" class="function-link"><span class="function-syntax">HTML::end_link</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="4-cu.html#SP2">§2</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>§3. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Unsigned::unsigned_chapter_title</span><button class="popup" onclick="togglePopup('usagePopup3')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup3">Usage of <span class="code-font"><span class="function-syntax">Unsigned::unsigned_chapter_title</span></span>:<br/><a href="4-cu.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">navigation_design</span><span class="plain-syntax"> *</span><span class="identifier-syntax">self</span><span class="plain-syntax">, </span><span class="reserved-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="reserved-syntax">volume</span><span class="plain-syntax"> *</span><span class="identifier-syntax">V</span><span class="plain-syntax">, </span><span class="reserved-syntax">chapter</span><span class="plain-syntax"> *</span><span class="identifier-syntax">C</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-cu.html#SP3_1" class="named-paragraph-link"><span class="named-paragraph">Render a chapter heading</span><span class="named-paragraph-number">3.1</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-cu.html#SP3_2" class="named-paragraph-link"><span class="named-paragraph">Render a section-contents listing</span><span class="named-paragraph-number">3.2</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP3_1" class="paragraph-anchor"></a><b>§3.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Render a chapter heading</span><span class="named-paragraph-number">3.1</span></span><span class="comment-syntax"> =</span>
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_OPEN_WITH</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">, </span><span class="string-syntax">"class=\"chapterheading\""</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="../../../inweb/docs/foundation-module/4-sm.html#SP8" class="function-link"><span class="function-syntax">Str::len</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">C</span><span class="plain-syntax">-></span><span class="element-syntax">chapter_anchor</span><span class="plain-syntax">) > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><a href="../../../inweb/docs/foundation-module/5-htm.html#SP17" class="function-link"><span class="function-syntax">HTML::anchor</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">C</span><span class="plain-syntax">-></span><span class="element-syntax">chapter_anchor</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%S"</span><span class="plain-syntax">, </span><span class="identifier-syntax">C</span><span class="plain-syntax">-></span><span class="element-syntax">chapter_full_title</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">);</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="4-cu.html#SP3">§3</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP3_2" class="paragraph-anchor"></a><b>§3.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Render a section-contents listing</span><span class="named-paragraph-number">3.2</span></span><span class="comment-syntax"> =</span>
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_OPEN_WITH</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">, </span><span class="string-syntax">"class=\"chaptercontents\""</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">lcount</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">section</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax"> = </span><span class="identifier-syntax">V</span><span class="plain-syntax">-></span><span class="element-syntax">sections</span><span class="plain-syntax">[0]; </span><span class="identifier-syntax">S</span><span class="plain-syntax">; </span><span class="identifier-syntax">S</span><span class="plain-syntax"> = </span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="element-syntax">next_section</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="element-syntax">in_which_chapter</span><span class="plain-syntax"> == </span><span class="identifier-syntax">C</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">lcount</span><span class="plain-syntax">++ > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"; "</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="../../../inweb/docs/foundation-module/5-htm.html#SP17" class="function-link"><span class="function-syntax">HTML::begin_link_with_class</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"standardlink"</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="element-syntax">section_URL</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_OPEN_WITH</span><span class="plain-syntax">(</span><span class="string-syntax">"span"</span><span class="plain-syntax">, </span><span class="string-syntax">"class=\"chaptercontentsitem\""</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%c%S"</span><span class="plain-syntax">, </span><span class="constant-syntax">SECTION_SYMBOL</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="element-syntax">title</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"span"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="../../../inweb/docs/foundation-module/5-htm.html#SP17" class="function-link"><span class="function-syntax">HTML::end_link</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">);</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="4-cu.html#SP3">§3</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>§4. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Unsigned::unsigned_section_title</span><button class="popup" onclick="togglePopup('usagePopup4')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup4">Usage of <span class="code-font"><span class="function-syntax">Unsigned::unsigned_section_title</span></span>:<br/><a href="4-cu.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">navigation_design</span><span class="plain-syntax"> *</span><span class="identifier-syntax">self</span><span class="plain-syntax">, </span><span class="reserved-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="reserved-syntax">volume</span><span class="plain-syntax"> *</span><span class="identifier-syntax">V</span><span class="plain-syntax">, </span><span class="reserved-syntax">chapter</span><span class="plain-syntax"> *</span><span class="identifier-syntax">C</span><span class="plain-syntax">, </span><span class="reserved-syntax">section</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_OPEN_WITH</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">, </span><span class="string-syntax">"class=\"sectionheading\""</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="../../../inweb/docs/foundation-module/4-sm.html#SP8" class="function-link"><span class="function-syntax">Str::len</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="element-syntax">section_anchor</span><span class="plain-syntax">) > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><a href="../../../inweb/docs/foundation-module/5-htm.html#SP17" class="function-link"><span class="function-syntax">HTML::anchor</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="element-syntax">section_anchor</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%c%S"</span><span class="plain-syntax">, </span><span class="constant-syntax">SECTION_SYMBOL</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="element-syntax">title</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>§5. Index top. </b>And this is a variant for index pages, such as the index of examples.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Unsigned::unsigned_navigation_index_top</span><button class="popup" onclick="togglePopup('usagePopup5')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup5">Usage of <span class="code-font"><span class="function-syntax">Unsigned::unsigned_navigation_index_top</span></span>:<br/><a href="4-cu.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">navigation_design</span><span class="plain-syntax"> *</span><span class="identifier-syntax">self</span><span class="plain-syntax">, </span><span class="reserved-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="reserved-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="reserved-syntax">filename</span><span class="plain-syntax">, </span><span class="reserved-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">title</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><a href="2-haj.html#SP11" class="function-link"><span class="function-syntax">HTMLUtilities::ruled_line</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP6" class="paragraph-anchor"></a><b>§6. Middle. </b>At the middle part, when the text is over, but before any example cues.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Unsigned::unsigned_navigation_middle</span><button class="popup" onclick="togglePopup('usagePopup6')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup6">Usage of <span class="code-font"><span class="function-syntax">Unsigned::unsigned_navigation_middle</span></span>:<br/><a href="4-cu.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">navigation_design</span><span class="plain-syntax"> *</span><span class="identifier-syntax">self</span><span class="plain-syntax">, </span><span class="reserved-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="reserved-syntax">volume</span><span class="plain-syntax"> *</span><span class="identifier-syntax">V</span><span class="plain-syntax">, </span><span class="reserved-syntax">section</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><a href="2-haj.html#SP11" class="function-link"><span class="function-syntax">HTMLUtilities::ruled_line</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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</pre>
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