tera.coop
/
katao-coop-tilleul
forked from jroussel/katao


			
				
					
						
						
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							<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Liens et texte en mode flot</title>
<link type="text/css" rel="stylesheet" href="../fpdf.css">
</head>
<body>
<h1>Liens et texte en mode flot</h1>
Ce tutoriel explique comment insérer des liens (internes et externes) et montre un nouveau mode
d'écriture du texte. Il contient également un parseur HTML rudimentaire.
<div class="source">
<pre><code>&lt;?php
<span class="kw">require(</span><span class="str">'fpdf.php'</span><span class="kw">);

class </span>PDF <span class="kw">extends </span>FPDF
<span class="kw">{
var </span>$B<span class="kw">;
var </span>$I<span class="kw">;
var </span>$U<span class="kw">;
var </span>$HREF<span class="kw">;

function </span>PDF<span class="kw">(</span>$orientation<span class="kw">=</span><span class="str">'P'</span><span class="kw">,</span>$unit<span class="kw">=</span><span class="str">'mm'</span><span class="kw">,</span>$format<span class="kw">=</span><span class="str">'A4'</span><span class="kw">)
{
    </span><span class="cmt">//Appel au constructeur parent
    </span>$<span class="kw">this-&gt;</span>FPDF<span class="kw">(</span>$orientation<span class="kw">,</span>$unit<span class="kw">,</span>$format<span class="kw">);
    </span><span class="cmt">//Initialisation
    </span>$<span class="kw">this-&gt;</span>B<span class="kw">=</span>0<span class="kw">;
    </span>$<span class="kw">this-&gt;</span>I<span class="kw">=</span>0<span class="kw">;
    </span>$<span class="kw">this-&gt;</span>U<span class="kw">=</span>0<span class="kw">;
    </span>$<span class="kw">this-&gt;</span>HREF<span class="kw">=</span><span class="str">''</span><span class="kw">;
}

function </span>WriteHTML<span class="kw">(</span>$html<span class="kw">)
{
    </span><span class="cmt">//Parseur HTML
    </span>$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>$html<span class="kw">);
    </span>$a<span class="kw">=</span>preg_split<span class="kw">(</span><span class="str">'/&lt;(.*)&gt;/U'</span><span class="kw">,</span>$html<span class="kw">,-</span>1<span class="kw">,</span>PREG_SPLIT_DELIM_CAPTURE<span class="kw">);
    foreach(</span>$a <span class="kw">as </span>$i<span class="kw">=&gt;</span>$e<span class="kw">)
    {
        if(</span>$i<span class="kw">%</span>2<span class="kw">==</span>0<span class="kw">)
        {
            </span><span class="cmt">//Texte
            </span><span class="kw">if(</span>$<span class="kw">this-&gt;</span>HREF<span class="kw">)
                </span>$<span class="kw">this-&gt;</span>PutLink<span class="kw">(</span>$<span class="kw">this-&gt;</span>HREF<span class="kw">,</span>$e<span class="kw">);
            else
                </span>$<span class="kw">this-&gt;</span>Write<span class="kw">(</span>5<span class="kw">,</span>$e<span class="kw">);
        }
        else
        {
            </span><span class="cmt">//Balise
            </span><span class="kw">if(</span>$e<span class="kw">[</span>0<span class="kw">]==</span><span class="str">'/'</span><span class="kw">)
                </span>$<span class="kw">this-&gt;</span>CloseTag<span class="kw">(</span>strtoupper<span class="kw">(</span>substr<span class="kw">(</span>$e<span class="kw">,</span>1<span class="kw">)));
            else
            {
                </span><span class="cmt">//Extraction des attributs
                </span>$a2<span class="kw">=</span>explode<span class="kw">(</span><span class="str">' '</span><span class="kw">,</span>$e<span class="kw">);
                </span>$tag<span class="kw">=</span>strtoupper<span class="kw">(</span>array_shift<span class="kw">(</span>$a2<span class="kw">));
                </span>$attr<span class="kw">=array();
                foreach(</span>$a2 <span class="kw">as </span>$v<span class="kw">)
                {
                    if(</span>preg_match<span class="kw">(</span><span class="str">'/([^=]*)=["\']?([^"\']*)/'</span><span class="kw">,</span>$v<span class="kw">,</span>$a3<span class="kw">))
                        </span>$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">];
                }
                </span>$<span class="kw">this-&gt;</span>OpenTag<span class="kw">(</span>$tag<span class="kw">,</span>$attr<span class="kw">);
            }
        }
    }
}

function </span>OpenTag<span class="kw">(</span>$tag<span class="kw">,</span>$attr<span class="kw">)
{
    </span><span class="cmt">//Balise ouvrante
    </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>$tag<span class="kw">==</span><span class="str">'U'</span><span class="kw">)
        </span>$<span class="kw">this-&gt;</span>SetStyle<span class="kw">(</span>$tag<span class="kw">,</span>true<span class="kw">);
    if(</span>$tag<span class="kw">==</span><span class="str">'A'</span><span class="kw">)
        </span>$<span class="kw">this-&gt;</span>HREF<span class="kw">=</span>$attr<span class="kw">[</span><span class="str">'HREF'</span><span class="kw">];
    if(</span>$tag<span class="kw">==</span><span class="str">'BR'</span><span class="kw">)
        </span>$<span class="kw">this-&gt;</span>Ln<span class="kw">(</span>5<span class="kw">);
}

function </span>CloseTag<span class="kw">(</span>$tag<span class="kw">)
{
    </span><span class="cmt">//Balise fermante
    </span><span class="kw">if(</span>$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">)
        </span>$<span class="kw">this-&gt;</span>SetStyle<span class="kw">(</span>$tag<span class="kw">,</span>false<span class="kw">);
    if(</span>$tag<span class="kw">==</span><span class="str">'A'</span><span class="kw">)
        </span>$<span class="kw">this-&gt;</span>HREF<span class="kw">=</span><span class="str">''</span><span class="kw">;
}

function </span>SetStyle<span class="kw">(</span>$tag<span class="kw">,</span>$enable<span class="kw">)
{
    </span><span class="cmt">//Modifie le style et sélectionne la police correspondante
    </span>$<span class="kw">this-&gt;</span>$tag<span class="kw">+=(</span>$enable <span class="kw">? </span>1 <span class="kw">: -</span>1<span class="kw">);
    </span>$style<span class="kw">=</span><span class="str">''</span><span class="kw">;
    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>$s<span class="kw">)
    {
        if(</span>$<span class="kw">this-&gt;</span>$s<span class="kw">&gt;</span>0<span class="kw">)
            </span>$style<span class="kw">.=</span>$s<span class="kw">;
    }
    </span>$<span class="kw">this-&gt;</span>SetFont<span class="kw">(</span><span class="str">''</span><span class="kw">,</span>$style<span class="kw">);
}

function </span>PutLink<span class="kw">(</span>$URL<span class="kw">,</span>$txt<span class="kw">)
{
    </span><span class="cmt">//Place un hyperlien
    </span>$<span class="kw">this-&gt;</span>SetTextColor<span class="kw">(</span>0<span class="kw">,</span>0<span class="kw">,</span>255<span class="kw">);
    </span>$<span class="kw">this-&gt;</span>SetStyle<span class="kw">(</span><span class="str">'U'</span><span class="kw">,</span>true<span class="kw">);
    </span>$<span class="kw">this-&gt;</span>Write<span class="kw">(</span>5<span class="kw">,</span>$txt<span class="kw">,</span>$URL<span class="kw">);
    </span>$<span class="kw">this-&gt;</span>SetStyle<span class="kw">(</span><span class="str">'U'</span><span class="kw">,</span>false<span class="kw">);
    </span>$<span class="kw">this-&gt;</span>SetTextColor<span class="kw">(</span>0<span class="kw">);
}
}

</span>$html<span class="kw">=</span><span class="str">'Vous pouvez maintenant imprimer facilement du texte mélangeant différents styles : &lt;b&gt;gras&lt;/b&gt;,
&lt;i&gt;italique&lt;/i&gt;, &lt;u&gt;souligné&lt;/u&gt;, ou &lt;b&gt;&lt;i&gt;&lt;u&gt;tous à la fois&lt;/u&gt;&lt;/i&gt;&lt;/b&gt; !&lt;br&gt;&lt;br&gt;Vous pouvez aussi
insérer des liens sous forme textuelle, comme &lt;a href="http://www.fpdf.org"&gt;www.fpdf.org&lt;/a&gt;, ou bien
sous forme d\'image : cliquez sur le logo.'</span><span class="kw">;

</span>$pdf<span class="kw">=new </span>PDF<span class="kw">();
</span><span class="cmt">//Première page
</span>$pdf<span class="kw">-&gt;</span>AddPage<span class="kw">();
</span>$pdf<span class="kw">-&gt;</span>SetFont<span class="kw">(</span><span class="str">'Arial'</span><span class="kw">,</span><span class="str">''</span><span class="kw">,</span>20<span class="kw">);
</span>$pdf<span class="kw">-&gt;</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">);
</span>$pdf<span class="kw">-&gt;</span>SetFont<span class="kw">(</span><span class="str">''</span><span class="kw">,</span><span class="str">'U'</span><span class="kw">);
</span>$link<span class="kw">=</span>$pdf<span class="kw">-&gt;</span>AddLink<span class="kw">();
</span>$pdf<span class="kw">-&gt;</span>Write<span class="kw">(</span>5<span class="kw">,</span><span class="str">'ici'</span><span class="kw">,</span>$link<span class="kw">);
</span>$pdf<span class="kw">-&gt;</span>SetFont<span class="kw">(</span><span class="str">''</span><span class="kw">);
</span><span class="cmt">//Seconde page
</span>$pdf<span class="kw">-&gt;</span>AddPage<span class="kw">();
</span>$pdf<span class="kw">-&gt;</span>SetLink<span class="kw">(</span>$link<span class="kw">);
</span>$pdf<span class="kw">-&gt;</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">);
</span>$pdf<span class="kw">-&gt;</span>SetLeftMargin<span class="kw">(</span>45<span class="kw">);
</span>$pdf<span class="kw">-&gt;</span>SetFontSize<span class="kw">(</span>14<span class="kw">);
</span>$pdf<span class="kw">-&gt;</span>WriteHTML<span class="kw">(</span>$html<span class="kw">);
</span>$pdf<span class="kw">-&gt;</span>Output<span class="kw">();
</span>?&gt;</code></pre>
</div>
<p class='demo'><a href='tuto6.php' target='_blank' class='demo'>[Démo]</a></p>
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> ;
les différences sont les suivantes :
<ul>
<li>La fin de ligne est au niveau de la marge droite et la ligne suivante commence à la marge gauche</li>
<li>La position courante se déplace juste à la fin du texte</li>
</ul>
Elle permet donc d'écrire une portion de texte, de modifier la police, puis de reprendre à partir
de l'endroit où on était resté. Par contre on ne peut plus justifier.
<br>
<br>
La méthode est utilisée sur la première page pour mettre un lien pointant sur la seconde. Le
début de la phrase est écrit en style normal, puis on passe en souligné pour terminer. Le lien
est créé grâce à la méthode <a href='../doc/addlink.htm'>AddLink()</a>, qui renvoie l'identifiant du lien. Cet identifiant
est passé en troisième paramètre à <span style="white-space:nowrap">Write()</span>. Après avoir
créé la seconde page, on utilise <a href='../doc/setlink.htm'>SetLink()</a> pour faire pointer le lien sur le début de la
page courante.
<br>
<br>
On place ensuite une image avec un lien externe dessus. Un lien externe pointe sur une URL (HTTP,
mailto...). L'URL est simplement transmise en dernier paramètre de <a href='../doc/image.htm'>Image()</a>.
<br>
<br>
Enfin, la marge gauche est déplacée après l'image grâce à <a href='../doc/setleftmargin.htm'>SetLeftMargin()</a> et du texte au
format HTML est imprimé. Un parseur HTML très simple est utilisé pour cela, basé sur les
expressions régulières. Les balises reconnues sont &lt;b&gt;, &lt;i&gt;, &lt;u&gt;, &lt;a&gt;
et &lt;br&gt; ; les autres sont ignorées. Le parseur utilise lui aussi la méthode Write(). Le lien externe se pose de la
même façon que l'interne (troisième paramètre de Write()). A noter que <a href='../doc/cell.htm'>Cell()</a> permet
également de poser des liens.
</body>
</html>