1 | <refentry xmlns="http://docbook.org/ns/docbook"
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2 | xmlns:xlink="http://www.w3.org/1999/xlink"
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3 | xmlns:xi="http://www.w3.org/2001/XInclude"
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4 | xmlns:src="http://nwalsh.com/xmlns/litprog/fragment"
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5 | xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
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6 | version="5.0" xml:id="man.th.title.max.length">
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7 | <refmeta>
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8 | <refentrytitle>man.th.title.max.length</refentrytitle>
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9 | <refmiscinfo class="other" otherclass="datatype">integer</refmiscinfo>
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10 | </refmeta>
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11 | <refnamediv>
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12 | <refname>man.th.title.max.length</refname>
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13 | <refpurpose>Maximum length of title in header/footer</refpurpose>
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14 | </refnamediv>
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15 |
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16 | <refsynopsisdiv>
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17 | <src:fragment xml:id="man.th.title.max.length.frag">
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18 | <xsl:param name="man.th.title.max.length">20</xsl:param>
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19 | </src:fragment>
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20 | </refsynopsisdiv>
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21 |
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22 | <refsection><info><title>Description</title></info>
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23 |
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24 | <para>Specifies the maximum permitted length of the title part of the
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25 | man-page <literal>.TH</literal> title line header/footer. If the title
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26 | exceeds the maxiumum specified, it is truncated down to the maximum
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27 | permitted length.</para>
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28 |
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29 | <refsection><info><title>Details</title></info>
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30 |
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31 |
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32 | <para>Every man page generated using the DocBook stylesheets has a
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33 | title line, specified using the <literal>TH</literal> roff
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34 | macro. Within that title line, there is always, at a minimum, a title,
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35 | followed by a section value (representing a man "section" -- usually
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36 | just a number).</para>
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37 |
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38 | <para>The title and section are displayed, together, in the visible
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39 | header of each page. Where in the header they are displayed depends on
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40 | OS the man page is viewed on, and on what version of nroff/groff/man
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41 | is used for viewing the page. But, at a minimum and across all
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42 | systems, the title and section are displayed on the right-hand column
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43 | of the header. On many systems -- those with a modern groff, including
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44 | Linux systems -- they are displayed twice: both in the left and right
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45 | columns of the header.</para>
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46 |
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47 | <para>So if the length of the title exceeds a certain percentage of
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48 | the column width in which the page is viewed, the left and right
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49 | titles can end up overlapping, making them unreadable, or breaking to
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50 | another line, which doesn't look particularly good.</para>
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51 |
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52 | <para>So the stylesheets provide the
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53 | <parameter>man.th.title.max.length</parameter> parameter as a means
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54 | for truncating titles that exceed the maximum length that can be
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55 | viewing properly in a page header.</para>
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56 |
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57 | <para>The default value is reasonable but somewhat arbitrary. If you
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58 | have pages with long titles, you may want to experiment with changing
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59 | the value in order to achieve the correct aesthetic results.</para>
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60 | </refsection>
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61 |
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62 | </refsection>
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63 | </refentry>
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