159 lines
12 KiB
HTML
159 lines
12 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Liens et texte en mode flot</title>
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<link type="text/css" rel="stylesheet" href="../fpdf.css">
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</head>
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<body>
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<h1>Liens et texte en mode flot</h1>
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Ce tutoriel explique comment insérer des liens (internes et externes) et montre un nouveau mode
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d'écriture du texte. Il contient également un interpréteur HTML rudimentaire.
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<div class="source">
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<pre><code><?php
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<span class="kw">require(</span><span class="str">'fpdf.php'</span><span class="kw">);
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class </span>PDF <span class="kw">extends </span>FPDF
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<span class="kw">{
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protected </span>$B <span class="kw">= </span>0<span class="kw">;
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protected </span>$I <span class="kw">= </span>0<span class="kw">;
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protected </span>$U <span class="kw">= </span>0<span class="kw">;
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protected </span>$HREF <span class="kw">= </span><span class="str">''</span><span class="kw">;
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function </span>WriteHTML<span class="kw">(</span>$html<span class="kw">)
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{
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</span><span class="cmt">// Parseur HTML
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</span>$html <span class="kw">= </span>str_replace<span class="kw">(</span><span class="str">"\n"</span><span class="kw">,</span><span class="str">' '</span><span class="kw">,</span>$html<span class="kw">);
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</span>$a <span class="kw">= </span>preg_split<span class="kw">(</span><span class="str">'/<(.*)>/U'</span><span class="kw">,</span>$html<span class="kw">,-</span>1<span class="kw">,</span>PREG_SPLIT_DELIM_CAPTURE<span class="kw">);
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foreach(</span>$a <span class="kw">as </span>$i<span class="kw">=></span>$e<span class="kw">)
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{
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if(</span>$i<span class="kw">%</span>2<span class="kw">==</span>0<span class="kw">)
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{
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</span><span class="cmt">// Texte
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</span><span class="kw">if(</span>$<span class="kw">this-></span>HREF<span class="kw">)
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</span>$<span class="kw">this-></span>PutLink<span class="kw">(</span>$<span class="kw">this-></span>HREF<span class="kw">,</span>$e<span class="kw">);
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else
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</span>$<span class="kw">this-></span>Write<span class="kw">(</span>5<span class="kw">,</span>$e<span class="kw">);
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}
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else
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{
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</span><span class="cmt">// Balise
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</span><span class="kw">if(</span>$e<span class="kw">[</span>0<span class="kw">]==</span><span class="str">'/'</span><span class="kw">)
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</span>$<span class="kw">this-></span>CloseTag<span class="kw">(</span>strtoupper<span class="kw">(</span>substr<span class="kw">(</span>$e<span class="kw">,</span>1<span class="kw">)));
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else
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{
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</span><span class="cmt">// Extraction des attributs
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</span>$a2 <span class="kw">= </span>explode<span class="kw">(</span><span class="str">' '</span><span class="kw">,</span>$e<span class="kw">);
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</span>$tag <span class="kw">= </span>strtoupper<span class="kw">(</span>array_shift<span class="kw">(</span>$a2<span class="kw">));
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</span>$attr <span class="kw">= array();
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foreach(</span>$a2 <span class="kw">as </span>$v<span class="kw">)
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{
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if(</span>preg_match<span class="kw">(</span><span class="str">'/([^=]*)=["\']?([^"\']*)/'</span><span class="kw">,</span>$v<span class="kw">,</span>$a3<span class="kw">))
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</span>$attr<span class="kw">[</span>strtoupper<span class="kw">(</span>$a3<span class="kw">[</span>1<span class="kw">])] = </span>$a3<span class="kw">[</span>2<span class="kw">];
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}
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</span>$<span class="kw">this-></span>OpenTag<span class="kw">(</span>$tag<span class="kw">,</span>$attr<span class="kw">);
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}
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}
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}
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}
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function </span>OpenTag<span class="kw">(</span>$tag<span class="kw">, </span>$attr<span class="kw">)
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{
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</span><span class="cmt">// Balise ouvrante
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</span><span class="kw">if(</span>$tag<span class="kw">==</span><span class="str">'B' </span><span class="kw">|| </span>$tag<span class="kw">==</span><span class="str">'I' </span><span class="kw">|| </span>$tag<span class="kw">==</span><span class="str">'U'</span><span class="kw">)
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</span>$<span class="kw">this-></span>SetStyle<span class="kw">(</span>$tag<span class="kw">,</span>true<span class="kw">);
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if(</span>$tag<span class="kw">==</span><span class="str">'A'</span><span class="kw">)
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</span>$<span class="kw">this-></span>HREF <span class="kw">= </span>$attr<span class="kw">[</span><span class="str">'HREF'</span><span class="kw">];
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if(</span>$tag<span class="kw">==</span><span class="str">'BR'</span><span class="kw">)
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</span>$<span class="kw">this-></span>Ln<span class="kw">(</span>5<span class="kw">);
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}
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function </span>CloseTag<span class="kw">(</span>$tag<span class="kw">)
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{
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</span><span class="cmt">// Balise fermante
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</span><span class="kw">if(</span>$tag<span class="kw">==</span><span class="str">'B' </span><span class="kw">|| </span>$tag<span class="kw">==</span><span class="str">'I' </span><span class="kw">|| </span>$tag<span class="kw">==</span><span class="str">'U'</span><span class="kw">)
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</span>$<span class="kw">this-></span>SetStyle<span class="kw">(</span>$tag<span class="kw">,</span>false<span class="kw">);
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if(</span>$tag<span class="kw">==</span><span class="str">'A'</span><span class="kw">)
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</span>$<span class="kw">this-></span>HREF <span class="kw">= </span><span class="str">''</span><span class="kw">;
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}
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function </span>SetStyle<span class="kw">(</span>$tag<span class="kw">, </span>$enable<span class="kw">)
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{
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</span><span class="cmt">// Modifie le style et sélectionne la police correspondante
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</span>$<span class="kw">this-></span>$tag <span class="kw">+= (</span>$enable <span class="kw">? </span>1 <span class="kw">: -</span>1<span class="kw">);
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</span>$style <span class="kw">= </span><span class="str">''</span><span class="kw">;
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foreach(array(</span><span class="str">'B'</span><span class="kw">, </span><span class="str">'I'</span><span class="kw">, </span><span class="str">'U'</span><span class="kw">) as </span>$s<span class="kw">)
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{
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if(</span>$<span class="kw">this-></span>$s<span class="kw">></span>0<span class="kw">)
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</span>$style <span class="kw">.= </span>$s<span class="kw">;
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}
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</span>$<span class="kw">this-></span>SetFont<span class="kw">(</span><span class="str">''</span><span class="kw">,</span>$style<span class="kw">);
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}
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function </span>PutLink<span class="kw">(</span>$URL<span class="kw">, </span>$txt<span class="kw">)
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{
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</span><span class="cmt">// Place un hyperlien
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</span>$<span class="kw">this-></span>SetTextColor<span class="kw">(</span>0<span class="kw">,</span>0<span class="kw">,</span>255<span class="kw">);
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</span>$<span class="kw">this-></span>SetStyle<span class="kw">(</span><span class="str">'U'</span><span class="kw">,</span>true<span class="kw">);
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</span>$<span class="kw">this-></span>Write<span class="kw">(</span>5<span class="kw">,</span>$txt<span class="kw">,</span>$URL<span class="kw">);
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</span>$<span class="kw">this-></span>SetStyle<span class="kw">(</span><span class="str">'U'</span><span class="kw">,</span>false<span class="kw">);
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</span>$<span class="kw">this-></span>SetTextColor<span class="kw">(</span>0<span class="kw">);
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}
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}
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</span>$html <span class="kw">= </span><span class="str">'Vous pouvez maintenant imprimer facilement du texte mélangeant différents styles : <b>gras</b>,
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<i>italique</i>, <u>souligné</u>, ou <b><i><u>tous à la fois</u></i></b> !<br><br>Vous pouvez aussi
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insérer des liens sous forme textuelle, comme <a href="http://www.fpdf.org">www.fpdf.org</a>, ou bien
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sous forme d\'image : cliquez sur le logo.'</span><span class="kw">;
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</span>$pdf <span class="kw">= new </span>PDF<span class="kw">();
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</span><span class="cmt">// Première page
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</span>$pdf<span class="kw">-></span>AddPage<span class="kw">();
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</span>$pdf<span class="kw">-></span>SetFont<span class="kw">(</span><span class="str">'Arial'</span><span class="kw">,</span><span class="str">''</span><span class="kw">,</span>20<span class="kw">);
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</span>$pdf<span class="kw">-></span>Write<span class="kw">(</span>5<span class="kw">,</span><span class="str">'Pour découvrir les nouveautés de ce tutoriel, cliquez '</span><span class="kw">);
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</span>$pdf<span class="kw">-></span>SetFont<span class="kw">(</span><span class="str">''</span><span class="kw">,</span><span class="str">'U'</span><span class="kw">);
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</span>$link <span class="kw">= </span>$pdf<span class="kw">-></span>AddLink<span class="kw">();
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</span>$pdf<span class="kw">-></span>Write<span class="kw">(</span>5<span class="kw">,</span><span class="str">'ici'</span><span class="kw">,</span>$link<span class="kw">);
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</span>$pdf<span class="kw">-></span>SetFont<span class="kw">(</span><span class="str">''</span><span class="kw">);
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</span><span class="cmt">// Seconde page
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</span>$pdf<span class="kw">-></span>AddPage<span class="kw">();
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</span>$pdf<span class="kw">-></span>SetLink<span class="kw">(</span>$link<span class="kw">);
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</span>$pdf<span class="kw">-></span>Image<span class="kw">(</span><span class="str">'logo.png'</span><span class="kw">,</span>10<span class="kw">,</span>12<span class="kw">,</span>30<span class="kw">,</span>0<span class="kw">,</span><span class="str">''</span><span class="kw">,</span><span class="str">'http://www.fpdf.org'</span><span class="kw">);
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</span>$pdf<span class="kw">-></span>SetLeftMargin<span class="kw">(</span>45<span class="kw">);
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</span>$pdf<span class="kw">-></span>SetFontSize<span class="kw">(</span>14<span class="kw">);
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</span>$pdf<span class="kw">-></span>WriteHTML<span class="kw">(</span>$html<span class="kw">);
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</span>$pdf<span class="kw">-></span>Output<span class="kw">();
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</span>?></code></pre>
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</div>
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<p class='demo'><a href='tuto6.php' target='_blank' class='demo'>[Démo]</a></p>
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La nouvelle méthode pour imprimer du texte est <a href='../doc/write.htm'>Write()</a>. Elle est très proche de <a href='../doc/multicell.htm'>MultiCell()</a> ;
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les différences sont les suivantes :
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<ul>
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<li>La fin de ligne est au niveau de la marge droite et la ligne suivante commence à la marge gauche</li>
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<li>La position courante se déplace juste à la fin du texte</li>
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</ul>
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Elle permet donc d'écrire une portion de texte, de modifier la police, puis de reprendre à partir
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de l'endroit où on était resté. Par contre on ne peut plus justifier.
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<br>
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<br>
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La méthode est utilisée sur la première page pour mettre un lien pointant sur la seconde. Le
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début de la phrase est écrit en style normal, puis on passe en souligné pour terminer. Le lien
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est créé grâce à la méthode <a href='../doc/addlink.htm'>AddLink()</a>, qui renvoie l'identifiant du lien. Cet identifiant
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est passé en troisième paramètre à <span style="white-space:nowrap">Write()</span>. Après avoir
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créé la seconde page, on utilise <a href='../doc/setlink.htm'>SetLink()</a> pour faire pointer le lien sur le début de la
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page courante.
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<br>
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<br>
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On place ensuite une image avec un lien externe dessus. Un lien externe est simplement une URL.
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Elle est transmise en dernier paramètre de <a href='../doc/image.htm'>Image()</a>.
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<br>
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<br>
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Enfin, la marge gauche est déplacée après l'image grâce à <a href='../doc/setleftmargin.htm'>SetLeftMargin()</a> et du texte au
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format HTML est imprimé. Un parseur HTML très simple est utilisé pour cela, basé sur les
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expressions régulières. Les balises reconnues sont <b>, <i>, <u>, <a>
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et <br> ; les autres sont ignorées. Le parseur utilise lui aussi la méthode Write(). Le lien externe se pose de la
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même façon que l'interne (troisième paramètre de Write()). A noter que <a href='../doc/cell.htm'>Cell()</a> permet
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également de poser des liens.
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</body>
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</html>
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