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<title>MHonArc Resources: ICONS</title>
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<td align="left" width="50%">[Prev: <a href="htmlext.html">HTMLEXT</a>]</td><td><nobr>[<a href="../resources.html#icons">Resources</a>][<a href="../mhonarc.html">TOC</a>]</nobr></td><td align="right" width="50%">[Next: <a href="iconurlprefix.html">ICONURLPREFIX</a>]</td></tr></table>
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<h1>ICONS</h1>
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<ul>
<li><a href="#syntax">Syntax</a>
<li><a href="#description">Description</a>
<li><a href="#default">Default Setting</a>
<li><a href="#rcvars">Resource Variables</a>
<li><a href="#examples">Examples</a>
<li><a href="#version">Version</a>
<li><a href="#seealso">See Also</a>
</ul>
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<h2><a name="syntax">Syntax</a></h2>
<dl>
<dt><strong>Envariable</strong></dt>
<dd><p>N/A
</p>
</dd>
<dt><strong>Element</strong></dt>
<dd><p>
<code><ICONS><br></code>
<var>icon-specification</var><br>
<var>icon-specification</var><br>
<var>...</var><br>
<code></ICONS><br></code>
</p>
</dd>
<dt><strong>Command-line Option</strong></dt>
<dd><p>N/A
</p>
</dd>
</dl>
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<h2><a name="description">Description</a></h2>
<P>The ICONS resource is used to specify the icons that represent the
different content-types of messages. This resource is used to
define the possible expanded values of the
<tt><a href="../rcvars.html#ICON">$ICON$</a></tt> resource variable.
</p>
<p>The ICON resource can only be defined via the resource file element.
The format of each line in the <CODE>ICONS</CODE> element is as
follows:
</p>
<pre>
<var>content-type</var>:<var>url</var>
</pre>
<p>The definition of each item is a follows:
<dl>
<dt><var>content-type</var></dt>
<dd><p>MIME content-type that an icon should be associated to.
Examples: <tt>text/plain</tt>, <tt>image/jpeg</tt>. An icon
can be associated to a base type by using a <tt>*</tt> as the
sub-type. Examples: <tt>text/*</tt>, <tt>image/*</tt>. The
default icon can be specified by using a content-type of
<tt>*/*</tt>.
</p>
</dd>
<dt><var>url</var></dt>
<dd><p>The URL of the icon. Example: <tt>http://host/icons/text.gif</tt>,
<tt>/icons/image.gif</tt>.
</p>
<p>The url can be prefixed with a
width and height specification to provide rendering hints to
browsers. The syntax for specify the width and height is
as follows: <tt>[<var>W</var>x<var>H</var>]</tt>, where
<var>W</var> is the width and <var>H</var> is the height. The
following is an example URL setting with width and height specification:
<tt>[20x22]/icons/image.gif</tt>.
</p>
<p>The width and height values map directly to the <tt>WIDTH</tt>
and <tt>HEIGHT</tt> attributes of the HTML <tt>IMG</tt> element
when <tt><a href="../rcvars.html#ICON">$ICON$</a></tt> is used.
Specifying the width and height decreases the rendering time
of a page since browsers do not have to wait to fetch the image
to determine how much area to provide for rendering.
</p>
</dd>
</dl>
<P>In order to have icons appear in your pages, use the
<tt><a href="../rcvars.html#ICON">$ICON$</a></tt> resource variable.
For example:
</p>
<pre class="code">
<b><LiTemplate></b>
$ICON$ <strong>$SUBJECT:40$</strong>
<em>$FROMNAME$</em><br>
<b></LiTemplate></b>
</pre>
<P>The <CODE>$ICON$</CODE> variable expands to the <CODE>IMG</CODE>
HTML element with the appropriate URL in the <CODE>SRC</CODE> attribute
to the icon. The <CODE>ALT</CODE> attribute of the <CODE>IMG</CODE>
element contains the content-type of the message, surrounded by
<CODE>[]</CODE>'s, for use with text based browsers. If the width
and height values have been defined for the given URL as described
earlier, they will map to the <tt>WIDTH</tt> and <tt>HEIGHT</tt> attributes.
</P>
<p>The <tt><a href="../rcvars.html#ICONURL">$ICONURL$</a></tt> resource
variable may be used if you want redefine the format of the
<CODE>IMG</CODE> element. For example:
</p>
<PRE class="code">
<b><LiTemplate></b>
<img src="$ICONURL$" alt="*">
<strong>$SUBJECT:40$</strong>
<em>$FROMNAME$</em><br>
<b></LiTemplate></b>
</PRE>
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<h2><a name="default">Default Setting</a></h2>
<p>Nil.
</p>
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<hr>
<h2><a name="rcvars">Resource Variables</a></h2>
<p>N/A
</p>
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<hr>
<h2><a name="examples">Examples</a></h2>
<p>The following example works well if using the Apache HTTP server
and the default set of icons that are provided with it:
</p>
<pre class="code">
<b><Icons></b>
application/*;[20x22]/icons/generic.gif
application/msword;[20x22]/icons/layout.gif
application/postscript;[20x22]/icons/ps.gif
application/rtf;[20x22]/icons/layout.gif
application/x-csh;[20x22]/icons/script.gif
application/x-dvi;[20x22]/icons/dvi.gif
application/x-gtar;[20x22]/icons/tar.gif
application/x-gzip;[20x22]/icons/compressed.gif
application/x-ksh;[20x22]/icons/script.gif
application/x-latex;[20x22]/icons/tex.gif
application/octet-stream;[20x22]/icons/binary.gif
application/x-patch;[20x22]/icons/patch.gif
application/pdf;[20x22]/icons/pdf.gif
application/x-script;[20x22]/icons/script.gif
application/x-sh;[20x22]/icons/script.gif
application/x-tar;[20x22]/icons/tar.gif
application/x-tex;[20x22]/icons/tex.gif
application/x-zip-compressed;[20x22]/icons/compressed.gif
application/zip;[20x22]/icons/compressed.gif
audio/*;[20x22]/icons/sound1.gif
chemical/*;[20x22]/icons/sphere2.gif
image/*;[20x22]/icons/image2.gif
message/external-body;[20x22]/icons/link.gif
multipart/*;[20x22]/icons/layout.gif
text/*;[20x22]/icons/text.gif
video/*;[20x22]/icons/movie.gif
*/*;[20x22]/icons/generic.gif
<b></Icons></b>
</pre>
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<h2><a name="version">Version</a></h2>
<p>1.0
</p>
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<hr>
<h2><a name="seealso">See Also</a></h2>
<p>
<tt><a href="../rcvars.html#ICON">$ICON$</a></tt>,
<tt><a href="../rcvars.html#ICONURL">$ICONURL$</a></tt>,
<a href="iconurlprefix.html">ICONURLPREFIX</a>,
<a href="litemplate.html">LITEMPLATE</a>,
<a href="tlitxt.html">TLITXT</a>,
<a href="tsingletxt.html">TSINGLETXT</a>,
<a href="ttopbegin.html">TTOPBEGIN</a>
</p>
<p>The
<tt><a href="mimefilters.html#m2h_external">m2h_external::filter</a></tt>
<a href="mimefilters.html">mime filter</a>.
</p>
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$Date: 2003/10/06 22:04:17 $ <br>
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