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inform7/docs/runtime-module/6-mh.html
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<title>Mapping Hints</title>
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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../inform7n.html">Inform7</a></li><li><a href="index.html">runtime</a></li><li><a href="index.html#6">Chapter 6: Completion Resources</a></li><li><b>Mapping Hints</b></li></ul></div>
<p class="purpose">To transcribe mapping hints for the World Index into suitable packages.</p>
<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>&#167;1. </b>To put it mildly, this does nothing at all clever:
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">RTMappingHints::compile</span><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">mapping_hint</span><span class="plain-syntax"> *</span><span class="identifier-syntax">hint</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER</span><span class="plain-syntax">(</span><span class="identifier-syntax">hint</span><span class="plain-syntax">, </span><span class="identifier-syntax">mapping_hint</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">package_request</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><a href="2-hrr.html#SP20" class="function-link"><span class="function-syntax">Hierarchy::completion_package</span></a><span class="plain-syntax">(</span><span class="constant-syntax">MAPPING_HINTS_HAP</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">dir</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">as_dir</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><a href="2-hrr.html#SP23" class="function-link"><span class="function-syntax">Hierarchy::apply_metadata_from_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_DIR_HL</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><a href="5-ins.html#SP1" class="function-link"><span class="function-syntax">RTInstances::value_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">dir</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><a href="2-hrr.html#SP23" class="function-link"><span class="function-syntax">Hierarchy::apply_metadata_from_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_AS_DIR_HL</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><a href="5-ins.html#SP1" class="function-link"><span class="function-syntax">RTInstances::value_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">as_dir</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">from</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">dir</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><a href="2-hrr.html#SP23" class="function-link"><span class="function-syntax">Hierarchy::apply_metadata_from_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_FROM_HL</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><a href="5-ins.html#SP1" class="function-link"><span class="function-syntax">RTInstances::value_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">from</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><a href="2-hrr.html#SP23" class="function-link"><span class="function-syntax">Hierarchy::apply_metadata_from_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_TO_HL</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><a href="5-ins.html#SP1" class="function-link"><span class="function-syntax">RTInstances::value_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">to</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><a href="2-hrr.html#SP23" class="function-link"><span class="function-syntax">Hierarchy::apply_metadata_from_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_DIR_HL</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><a href="5-ins.html#SP1" class="function-link"><span class="function-syntax">RTInstances::value_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">dir</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">name</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><a href="6-mh.html#SP1" class="function-link"><span class="function-syntax">RTMappingHints::apply_metadata_from_wide_string</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_NAME_HL</span><span class="plain-syntax">, </span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">name</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-hrr.html#SP23" class="function-link"><span class="function-syntax">Hierarchy::apply_metadata_from_number</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_SCOPE_LEVEL_HL</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax">) (</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">scope_level</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><a href="2-hrr.html#SP23" class="function-link"><span class="function-syntax">Hierarchy::apply_metadata_from_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_SCOPE_INSTANCE_HL</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><a href="5-ins.html#SP1" class="function-link"><span class="function-syntax">RTInstances::value_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">scope_I</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><a href="6-mh.html#SP1" class="function-link"><span class="function-syntax">RTMappingHints::apply_metadata_from_wide_string</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_TEXT_HL</span><span class="plain-syntax">, </span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">put_string</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-hrr.html#SP23" class="function-link"><span class="function-syntax">Hierarchy::apply_metadata_from_number</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_NUMBER_HL</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax">) (</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">put_integer</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">annotation</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><a href="6-mh.html#SP1" class="function-link"><span class="function-syntax">RTMappingHints::apply_metadata_from_wide_string</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_ANNOTATION_HL</span><span class="plain-syntax">, </span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">annotation</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-hrr.html#SP23" class="function-link"><span class="function-syntax">Hierarchy::apply_metadata_from_number</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_POINT_SIZE_HL</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax">) (</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">point_size</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><a href="6-mh.html#SP1" class="function-link"><span class="function-syntax">RTMappingHints::apply_metadata_from_wide_string</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_FONT_HL</span><span class="plain-syntax">, </span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">font</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="6-mh.html#SP1" class="function-link"><span class="function-syntax">RTMappingHints::apply_metadata_from_wide_string</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_COLOUR_HL</span><span class="plain-syntax">, </span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">colour</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-hrr.html#SP23" class="function-link"><span class="function-syntax">Hierarchy::apply_metadata_from_number</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_OFFSET_HL</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax">) (</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">at_offset</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><a href="2-hrr.html#SP23" class="function-link"><span class="function-syntax">Hierarchy::apply_metadata_from_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">MH_OFFSET_FROM_HL</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><a href="5-ins.html#SP1" class="function-link"><span class="function-syntax">RTInstances::value_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">hint</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">offset_from</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">RTMappingHints::apply_metadata_from_wide_string</span><span class="plain-syntax">(</span><span class="identifier-syntax">package_request</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">hl</span><span class="plain-syntax">, </span><span class="identifier-syntax">inchar32_t</span><span class="plain-syntax"> *</span><span class="identifier-syntax">wide</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::new</span><span class="plain-syntax">();</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">wide</span><span class="plain-syntax">) </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="string-syntax">"%w"</span><span class="plain-syntax">, </span><span class="identifier-syntax">wide</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-hrr.html#SP23" class="function-link"><span class="function-syntax">Hierarchy::apply_metadata</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">hl</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
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