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Des macros LaTeX pour markdown
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<p><span class="sc"><abbr title="Trop long à lire">tlàl</abbr> : </span> J’ai fait un système simple de macros pour mon blog. Par exemple, il me suffit d’écrire %<span />latex et ça affiche <span style="text-transform: uppercase">L<sup style="vertical-align: 0.15em; margin-left: -0.36em; margin-right: -0.15em; font-size: .85em">a</sup>T<sub style="vertical-align: -0.5ex; margin-left: -0.1667em; margin-right: -0.125em; font-size: 1em">e</sub>X</span>.</p>
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<p>J’ai ajouter un système de macro pour mon système de blog.
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Lorsqu’on est habitué à <span style="text-transform: uppercase">L<sup style="vertical-align: 0.15em; margin-left: -0.36em; margin-right: -0.15em; font-size: .85em">a</sup>T<sub style="vertical-align: -0.5ex; margin-left: -0.1667em; margin-right: -0.125em; font-size: 1em">e</sub>X</span> et que l’on commence à écrire des articles
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un peu conséquent avec des notations mathématiques,
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les macros deviennent vite quelque chose d’indispensable.</p>
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<p>Dans l’entête de mes fichiers j’écris simplement:</p>
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<pre class="twilight">
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<span class="MetaTagAll"><span class="MetaTagInline">macros</span><span class="MetaTagAll">:</span></span>
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<span class="MetaTagAll"><span class="MetaTagInline">test</span><span class="MetaTagAll">:</span> </span><span class="String"><span class="String">"</span>This is a macro test<span class="String">"</span></span>
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<span class="MetaTagAll"><span class="MetaTagInline">latex</span><span class="MetaTagAll">:</span> </span><span class="String"><span class="String">'</span><span style="text-transform: uppercase">L<sup style="vertical-align: 0.15em; margin-left: -0.36em; margin-right: -0.15em; font-size: .85em">a</sup>T<sub style="vertical-align: -0.5ex; margin-left: -0.1667em; margin-right: -0.125em; font-size: 1em">e</sub>X</span><span class="String">'</span></span>
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</pre>
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<p>Puis dans le corps ça va remplacer :</p>
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<ul>
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<li>%<span />test par <em>This is a macro test</em> ;</li>
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<li>et %<span />latex par <em><span style="text-transform: uppercase">L<sup style="vertical-align: 0.15em; margin-left: -0.36em; margin-right: -0.15em; font-size: .85em">a</sup>T<sub style="vertical-align: -0.5ex; margin-left: -0.1667em; margin-right: -0.125em; font-size: 1em">e</sub>X</span></em></li>
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</ul>
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<p>Le code est assez simple.
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Pour les utilisateurs de <code>nanoc</code> il suffit de copier le fichier suivant dans le répertoire <code>lib</code>. </p>
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<div class="code"><div class="file"><a href="/Scratch/fr/blog/2010-10-26-LaTeX-like-macro-and-markdown/code/macros.rb"> ➥ macros.rb </a></div><div class="withfile">
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<pre class="twilight">
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<span class="Comment"><span class="Comment">#</span> usage:</span>
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<span class="Comment"><span class="Comment">#</span> ---</span>
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<span class="Comment"><span class="Comment">#</span> ...</span>
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<span class="Comment"><span class="Comment">#</span> macros:</span>
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<span class="Comment"><span class="Comment">#</span> test: "passed test"</span>
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<span class="Comment"><span class="Comment">#</span> ---</span>
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<span class="Comment"><span class="Comment">#</span> ...</span>
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<span class="Comment"><span class="Comment">#</span> Here is a This is a macro test.</span>
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<span class="Comment"><span class="Comment">#</span></span>
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<span class="Keyword">class</span> <span class="Entity">Macros<span class="EntityInheritedClass"> <span class="EntityInheritedClass"><</span> Nanoc3::Filter</span></span>
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identifier <span class="Constant"><span class="Constant">:</span>falacy</span>
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<span class="Keyword">attr_accessor</span> <span class="Constant"><span class="Constant">:</span>macro</span>
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<span class="Keyword">def</span> <span class="Entity">initialize</span>(<span class="Variable">arg</span>)
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<span class="Keyword">super</span>
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<span class="Variable"><span class="Variable">@</span>macro</span><span class="Keyword">=</span>{}
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<span class="Variable"><span class="Variable">@</span>macro</span>[<span class="Constant"><span class="Constant">:</span>tlal</span>] <span class="Keyword">=</span> <span class="String"><span class="String">%{</span><span class="sc"><abbr title="Trop long à lire">tlàl</abbr> : </span><span class="String">}</span></span>
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<span class="Variable"><span class="Variable">@</span>macro</span>[<span class="Constant"><span class="Constant">:</span>tldr</span>] <span class="Keyword">=</span> <span class="String"><span class="String">%{</span><span class="sc"><abbr title="Too long; didn't read">tl;dr</abbr>: </span><span class="String">}</span></span>
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<span class="Keyword">if</span> <span class="Variable"><span class="Variable">@</span>item</span>.<span class="Entity">nil?</span>
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<span class="Keyword">if</span> <span class="Keyword">not</span> arg.<span class="Entity">nil?</span>
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<span class="Variable"><span class="Variable">@</span>macro</span>.<span class="Entity">merge!</span>( arg )
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<span class="Keyword">end</span>
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<span class="Keyword">else</span>
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<span class="Keyword">if</span> <span class="Keyword">not</span> <span class="Variable"><span class="Variable">@</span>item</span>[<span class="Constant"><span class="Constant">:</span>macros</span>].<span class="Entity">nil?</span>
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<span class="Variable"><span class="Variable">@</span>macro</span>.<span class="Entity">merge!</span>( <span class="Variable"><span class="Variable">@</span>item</span>[<span class="Constant"><span class="Constant">:</span>macros</span>] )
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<span class="Keyword">end</span>
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<span class="Keyword">end</span>
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<span class="Keyword">end</span>
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<span class="Keyword">def</span> <span class="Entity">macro_value_for</span>(<span class="Variable">macro_name</span>)
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<span class="Keyword">if</span> macro_name.<span class="Entity">nil?</span> <span class="Keyword">or</span> macro_name<span class="Keyword">==</span><span class="String"><span class="String">"</span><span class="String">"</span></span> <span class="Keyword">or</span> <span class="Variable"><span class="Variable">@</span>macro</span>[macro_name.<span class="Entity">intern</span>].<span class="Entity">nil?</span>
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<span class="Keyword">return</span> <span class="String"><span class="String">%{</span>%<span class="StringEmbeddedSource"><span class="StringEmbeddedSource">#{</span>macro_name<span class="StringEmbeddedSource">}</span></span><span class="String">}</span></span>
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<span class="Keyword">end</span>
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<span class="Keyword">return</span> <span class="Variable"><span class="Variable">@</span>macro</span>[macro_name.<span class="Entity">intern</span>]
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<span class="Keyword">end</span>
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<span class="Keyword">def</span> <span class="Entity">run</span>(<span class="Variable">content<span class="Variable">,</span> params<span class="Keyword">=</span><span class="Variable">{</span><span class="Variable">}</span></span>)
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content.<span class="Entity">gsub</span>(<span class="StringRegexp"><span class="StringRegexp">/</span></span><span class="StringRegexp">%<span class="StringRegexp"><span class="StringRegexp">(</span><span class="StringRegexpSpecial">\w</span>*<span class="StringRegexp">)</span></span></span><span class="StringRegexp"><span class="StringRegexp">/</span></span>) <span class="Keyword">do </span>|<span class="Variable">m</span>|
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<span class="Keyword">if</span> m <span class="Keyword">!=</span> <span class="String"><span class="String">'</span>%<span class="String">'</span></span>
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<span class="Entity">macro_value_for</span>(<span class="Variable"><span class="Variable">$</span>1</span>)
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<span class="Keyword">else</span>
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m
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<span class="Keyword">end</span>
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<span class="Keyword">end</span>
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<span class="Keyword">end</span>
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<span class="Keyword">end</span>
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</pre>
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</div></div>
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<p>Les macros peuvent être vraiment utiles. Lisez <a href="http://adam.gomaa.us/blog/2007/oct/22/markdown-doesnt-scale/index.html">cet article</a> par exemple.</p>
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<a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/deed.fr">Droits de reproduction ©, Yann Esposito</a>
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Écrit le : 26/10/2010
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modifié le : 26/10/2011
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Site entièrement réalisé avec
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<a href="http://www.vim.org">Vim</a>
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et
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<a href="http://nanoc.stoneship.org">nanoc</a>
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