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diff --git a/doc/groff.html.node/Vertical-Position-Traps.html b/doc/groff.html.node/Vertical-Position-Traps.html new file mode 100644 index 0000000..d12f564 --- /dev/null +++ b/doc/groff.html.node/Vertical-Position-Traps.html @@ -0,0 +1,94 @@ +<!DOCTYPE html> +<html> +<!-- Created by GNU Texinfo 7.0.3, https://www.gnu.org/software/texinfo/ --> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> +<!-- This manual documents GNU troff version 1.23.0. + +Copyright © 1994-2023 Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with no +Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A +copy of the license is included in the section entitled "GNU Free +Documentation License". --> +<title>Vertical Position Traps (The GNU Troff Manual)</title> + +<meta name="description" content="Vertical Position Traps (The GNU Troff Manual)"> +<meta name="keywords" content="Vertical Position Traps (The GNU Troff Manual)"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<meta name="viewport" content="width=device-width,initial-scale=1"> + +<link href="index.html" rel="start" title="Top"> +<link href="Request-Index.html" rel="index" title="Request Index"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="Traps.html" rel="up" title="Traps"> +<link href="Page-Location-Traps.html" rel="next" title="Page Location Traps"> +<link href="Traps.html" rel="prev" title="Traps"> +<style type="text/css"> +<!-- +a.copiable-link {visibility: hidden; text-decoration: none; line-height: 0em} +span.r {font-family: initial; font-weight: normal; font-style: normal} +span:hover a.copiable-link {visibility: visible} +strong.def-name {font-family: monospace; font-weight: bold; font-size: larger} +--> +</style> + + +</head> + +<body lang="en"> +<div class="subsection-level-extent" id="Vertical-Position-Traps"> +<div class="nav-panel"> +<p> +Next: <a href="Page-Location-Traps.html" accesskey="n" rel="next">Page Location Traps</a>, Previous: <a href="Traps.html" accesskey="p" rel="prev">Traps</a>, Up: <a href="Traps.html" accesskey="u" rel="up">Traps</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Request-Index.html" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<h4 class="subsection" id="Vertical-Position-Traps-1">5.28.1 Vertical Position Traps</h4> +<a class="index-entry-id" id="index-vertical-position-traps"></a> +<a class="index-entry-id" id="index-traps_002c-vertical-position"></a> + +<p>A <em class="dfn">vertical position trap</em> calls a macro when the formatter’s +vertical drawing position reaches or passes, in the downward direction, +a certain location on the output page or in a diversion. Its +applications include setting page headers and footers, body text in +multiple columns, and footnotes. +</p> +<dl class="first-deffn"> +<dt class="deffn" id="index-_002evpt"><span class="category-def">Request: </span><span><strong class="def-name"><code class="t">.vpt</code></strong> <var class="def-var-arguments">[<span class="r"><i class="slanted">flag</i></span>]</var><a class="copiable-link" href='#index-_002evpt'> ¶</a></span></dt> +<dd><a class="index-entry-id" id="index-vpt"></a> +</dd><dt class="deffnx def-cmd-deffn" id="index-_005cn_005b_002evpt_005d"><span class="category-def">Register: </span><span><strong class="def-name"><code class="t">\n[.vpt]</code></strong><a class="copiable-link" href='#index-_005cn_005b_002evpt_005d'> ¶</a></span></dt> +<dd><a class="index-entry-id" id="index-_002evpt-1"></a> +<a class="index-entry-id" id="index-enabling-vertical-position-traps-_0028vpt_0029"></a> +<a class="index-entry-id" id="index-vertical-position-traps_002c-enabling-_0028vpt_0029"></a> +<a class="index-entry-id" id="index-vertical-position-trap-enable-register-_0028_002evpt_0029"></a> +<p>Enable vertical position traps if <var class="var">flag</var> is non-zero or absent; +disable them otherwise. Vertical position traps are those set by the +<code class="code">wh</code> request or by <code class="code">dt</code> within a diversion. The parameter +that controls whether vertical position traps are enabled is global. +Initially, vertical position traps are enabled. The current value is +stored in the <code class="code">.vpt</code> read-only register. +</p> +<a class="index-entry-id" id="index-page-break_002c-prevented-by-vpt"></a> +<a class="index-entry-id" id="index-break_002c-page_002c-prevented-by-vpt"></a> +<a class="index-entry-id" id="index-page-ejection_002c-prevented-by-vpt"></a> +<a class="index-entry-id" id="index-ejection_002c-page_002c-prevented-by-vpt"></a> +<p>A page can’t be ejected if <code class="code">vpt</code> is set to zero; see <a class="ref" href="The-Implicit-Page-Trap.html">The Implicit Page Trap</a>. +</p></dd></dl> + + + +<ul class="mini-toc"> +<li><a href="Page-Location-Traps.html" accesskey="1">Page Location Traps</a></li> +<li><a href="The-Implicit-Page-Trap.html" accesskey="2">The Implicit Page Trap</a></li> +<li><a href="Diversion-Traps.html" accesskey="3">Diversion Traps</a></li> +</ul> +</div> + + + +</body> +</html> |