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</pre></td><td class="de1"><pre class="de1"><span class="kw2"><?php</span>
<span class="kw2">namespace</span> Tx\Foo\ViewHelpers<span class="sy0">;</span>
 
<span class="kw2">use</span> TYPO3\CMS\Backend\Utility\BackendUtility<span class="sy0">;</span>
<span class="kw2">use</span> TYPO3\CMS\Core\Utility\GeneralUtility<span class="sy0">;</span>
<span class="kw2">use</span> TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper<span class="sy0">;</span>
 
<span class="co4">/**</span>
<span class="co4"> * Create a HTML link to a page in the backend.</span>
<span class="co4"> * Useful for links in the backend preview.</span>
<span class="co4"> *</span>
<span class="co4"> * @author Christian Weiske <weiske@mogic.com></span>
<span class="co4"> */</span>
<span class="kw2">class</span> BackendPreviewLinkViewHelper <span class="kw2">extends</span> AbstractViewHelper
<span class="br0">{</span>
    <span class="co4">/**</span>
<span class="co4">     * Create a HTML link</span>
<span class="co4">     *</span>
<span class="co4">     * @param string $parameter Typolink</span>
<span class="co4">     *</span>
<span class="co4">     * @return string HTML</span>
<span class="co4">     */</span>
    <span class="kw2">public</span> <span class="kw2">function</span> render<span class="br0">(</span><span class="re0">$parameter</span><span class="br0">)</span>
    <span class="br0">{</span>
        <span class="re0">$attributes</span> <span class="sy0">=</span> <span class="st_h">''</span><span class="sy0">;</span>
        <span class="re0">$text</span> <span class="sy0">=</span> <span class="re0">$this</span><span class="sy0">-></span><span class="me1">renderChildren</span><span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span>
        <span class="kw1">if</span> <span class="br0">(</span><a href="http://www.php.net/trim"><span class="kw3">trim</span></a><span class="br0">(</span><span class="re0">$text</span><span class="br0">)</span> <span class="sy0">==</span> <span class="st_h">''</span><span class="br0">)</span> <span class="br0">{</span>
            <span class="re0">$text</span> <span class="sy0">=</span> <span class="st_h">'(no text)'</span><span class="sy0">;</span>
        <span class="br0">}</span>
 
        <span class="kw1">if</span> <span class="br0">(</span><a href="http://www.php.net/trim"><span class="kw3">trim</span></a><span class="br0">(</span><span class="re0">$parameter</span><span class="br0">)</span> <span class="sy0">==</span> <span class="st_h">''</span><span class="br0">)</span> <span class="br0">{</span>
            <span class="kw1">return</span> <span class="re0">$text</span><span class="sy0">;</span>
        <span class="br0">}</span>
 
        <span class="kw1">if</span> <span class="br0">(</span><a href="http://www.php.net/is_numeric"><span class="kw3">is_numeric</span></a><span class="br0">(</span><span class="re0">$parameter</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span>
            <span class="co1">//page id</span>
            <span class="re0">$url</span> <span class="sy0">=</span> BackendUtility<span class="sy0">::</span><span class="me2">getModuleUrl</span><span class="br0">(</span>
                <span class="st_h">'web_layout'</span><span class="sy0">,</span>
                <a href="http://www.php.net/array"><span class="kw3">array</span></a><span class="br0">(</span>
                    <span class="st_h">'id'</span> <span class="sy0">=></span> <span class="re0">$parameter</span>
                <span class="br0">)</span>
            <span class="br0">)</span><span class="sy0">;</span>
            <span class="re0">$title</span> <span class="sy0">=</span> <span class="st_h">'Page #'</span> <span class="sy0">.</span> <span class="re0">$parameter</span><span class="sy0">;</span>
        <span class="br0">}</span> <span class="kw1">else</span> <span class="kw1">if</span> <span class="br0">(</span><a href="http://www.php.net/preg_match"><span class="kw3">preg_match</span></a><span class="br0">(</span><span class="st_h">'.\\d+#\\d+$.'</span><span class="sy0">,</span> <span class="re0">$parameter</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span>
            <span class="co1">//page id and content element ID</span>
            <a href="http://www.php.net/list"><span class="kw3">list</span></a><span class="br0">(</span><span class="re0">$pageId</span><span class="sy0">,</span> <span class="re0">$contentId</span><span class="br0">)</span> <span class="sy0">=</span> <a href="http://www.php.net/explode"><span class="kw3">explode</span></a><span class="br0">(</span><span class="st_h">'#'</span><span class="sy0">,</span> <span class="re0">$parameter</span><span class="br0">)</span><span class="sy0">;</span>
            <span class="re0">$url</span> <span class="sy0">=</span> BackendUtility<span class="sy0">::</span><span class="me2">getModuleUrl</span><span class="br0">(</span>
                <span class="st_h">'web_layout'</span><span class="sy0">,</span>
                <a href="http://www.php.net/array"><span class="kw3">array</span></a><span class="br0">(</span>
                    <span class="st_h">'id'</span> <span class="sy0">=></span> <span class="re0">$pageId</span>
                <span class="br0">)</span>
            <span class="br0">)</span> <span class="sy0">.</span> <span class="st_h">'#element-tt_content-'</span> <span class="sy0">.</span> <span class="re0">$contentId</span><span class="sy0">;</span>
            <span class="re0">$title</span> <span class="sy0">=</span> <span class="st_h">'Page #'</span> <span class="sy0">.</span> <span class="re0">$pageId</span> <span class="sy0">.</span> <span class="st_h">', element #'</span> <span class="sy0">.</span> <span class="re0">$contentId</span><span class="sy0">;</span>
        <span class="br0">}</span> <span class="kw1">else</span> <span class="kw1">if</span> <span class="br0">(</span><a href="http://www.php.net/substr"><span class="kw3">substr</span></a><span class="br0">(</span><span class="re0">$parameter</span><span class="sy0">,</span> <span class="nu0">0</span><span class="sy0">,</span> <span class="nu0">5</span><span class="br0">)</span> <span class="sy0">==</span> <span class="st_h">'file:'</span><span class="br0">)</span> <span class="br0">{</span>
            <span class="co1">//File</span>
            <span class="kw1">return</span> <span class="re0">$text</span> <span class="sy0">.</span> <span class="st_h">' | <tt>'</span> <span class="sy0">.</span> <a href="http://www.php.net/htmlspecialchars"><span class="kw3">htmlspecialchars</span></a><span class="br0">(</span><span class="re0">$parameter</span><span class="br0">)</span> <span class="sy0">.</span> <span class="st_h">'</tt>'</span><span class="sy0">;</span>
        <span class="br0">}</span> <span class="kw1">else</span> <span class="kw1">if</span> <span class="br0">(</span><a href="http://www.php.net/substr"><span class="kw3">substr</span></a><span class="br0">(</span><span class="re0">$parameter</span><span class="sy0">,</span> <span class="nu0">0</span><span class="sy0">,</span> <span class="nu0">7</span><span class="br0">)</span> <span class="sy0">==</span> <span class="st_h">'http://'</span>
            <span class="sy0">||</span> <a href="http://www.php.net/substr"><span class="kw3">substr</span></a><span class="br0">(</span><span class="re0">$parameter</span><span class="sy0">,</span> <span class="nu0">0</span><span class="sy0">,</span> <span class="nu0">8</span><span class="br0">)</span> <span class="sy0">==</span> <span class="st_h">'https://'</span>
        <span class="br0">)</span> <span class="br0">{</span>
            <span class="co1">//External URL</span>
            <a href="http://www.php.net/list"><span class="kw3">list</span></a><span class="br0">(</span><span class="re0">$url</span><span class="br0">)</span> <span class="sy0">=</span> <a href="http://www.php.net/explode"><span class="kw3">explode</span></a><span class="br0">(</span><span class="st_h">' '</span><span class="sy0">,</span> <span class="re0">$parameter</span><span class="br0">)</span><span class="sy0">;</span>
            <span class="re0">$title</span> <span class="sy0">=</span> <span class="re0">$parameter</span><span class="sy0">;</span>
            <span class="re0">$attributes</span> <span class="sy0">=</span> <span class="st_h">' target="_blank"'</span><span class="sy0">;</span>
            <span class="re0">$extra</span> <span class="sy0">=</span> <span class="st_h">'➚'</span><span class="sy0">;</span>
        <span class="br0">}</span> <span class="kw1">else</span> <span class="kw1">if</span> <span class="br0">(</span><a href="http://www.php.net/preg_match"><span class="kw3">preg_match</span></a><span class="br0">(</span><span class="st_h">'#^[^ ]+@[^a]#'</span><span class="sy0">,</span> <span class="re0">$parameter</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span>
            <span class="co1">//email</span>
            <a href="http://www.php.net/list"><span class="kw3">list</span></a><span class="br0">(</span><span class="re0">$address</span><span class="br0">)</span> <span class="sy0">=</span> <a href="http://www.php.net/explode"><span class="kw3">explode</span></a><span class="br0">(</span><span class="st_h">' '</span><span class="sy0">,</span> <span class="re0">$parameter</span><span class="br0">)</span><span class="sy0">;</span>
            <span class="re0">$url</span>   <span class="sy0">=</span> <span class="st_h">'mailto:'</span> <span class="sy0">.</span> <span class="re0">$address</span><span class="sy0">;</span>
            <span class="re0">$title</span> <span class="sy0">=</span> <span class="re0">$parameter</span><span class="sy0">;</span>
        <span class="br0">}</span> <span class="kw1">else</span> <span class="kw1">if</span> <span class="br0">(</span><span class="re0">$parameter</span><span class="br0">{</span><span class="nu0">0</span><span class="br0">}</span> <span class="sy0">==</span> <span class="st_h">'/'</span><span class="br0">)</span> <span class="br0">{</span>
            <span class="co1">//custom relative URL</span>
            <span class="re0">$url</span>   <span class="sy0">=</span> <span class="re0">$parameter</span><span class="sy0">;</span>
            <span class="re0">$title</span> <span class="sy0">=</span> <span class="re0">$parameter</span><span class="sy0">;</span>
            <span class="re0">$attributes</span> <span class="sy0">=</span> <span class="st_h">' target="_blank"'</span><span class="sy0">;</span>
            <span class="re0">$extra</span> <span class="sy0">=</span> <span class="st_h">'➚'</span><span class="sy0">;</span>
        <span class="br0">}</span> <span class="kw1">else</span> <span class="br0">{</span>
            <span class="co1">//unknown</span>
            <span class="kw1">return</span> <span class="st_h">'<tt>'</span> <span class="sy0">.</span> <a href="http://www.php.net/htmlspecialchars"><span class="kw3">htmlspecialchars</span></a><span class="br0">(</span><span class="re0">$parameter</span><span class="br0">)</span> <span class="sy0">.</span> <span class="st_h">'</tt>'</span><span class="sy0">;</span>
        <span class="br0">}</span>
 
        <span class="kw1">return</span> <span class="st_h">'<a href="'</span> <span class="sy0">.</span> <a href="http://www.php.net/htmlspecialchars"><span class="kw3">htmlspecialchars</span></a><span class="br0">(</span><span class="re0">$url</span><span class="br0">)</span> <span class="sy0">.</span> <span class="st_h">'"'</span>
            <span class="sy0">.</span> <span class="st_h">' title="'</span> <span class="sy0">.</span> <a href="http://www.php.net/htmlspecialchars"><span class="kw3">htmlspecialchars</span></a><span class="br0">(</span><span class="re0">$title</span><span class="br0">)</span> <span class="sy0">.</span> <span class="st_h">'"'</span>
            <span class="sy0">.</span> <span class="st_h">' style="text-decoration: underline"'</span>
            <span class="sy0">.</span> <span class="re0">$attributes</span>
            <span class="sy0">.</span> <span class="st_h">'>'</span>
            <span class="sy0">.</span> <span class="re0">$text</span>
            <span class="sy0">.</span> <span class="st_h">'</a>'</span>
            <span class="sy0">.</span> <span class="re0">$extra</span><span class="sy0">;</span>
    <span class="br0">}</span>
<span class="br0">}</span>
<span class="sy1">?></span>
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<a href="https://p.cweiske.de/301#BackendPreviewLinkViewHelper.php">BackendPreviewLinkViewHelper.php</a>
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</pre></td><td class="de1"><pre class="de1"><span class="sc3"><span class="re1"><html</span> <span class="re0">xmlns:foo</span>=<span class="st0">"http://typo3.org/ns/Tx/Foo/ViewHelpers"</span><span class="re2">></span></span>
...
<span class="sc3"><span class="re1"><f:section</span> <span class="re0">name</span>=<span class="st0">"Preview"</span><span class="re2">></span></span>
 Link: <span class="sc3"><span class="re1"><foo:backendPreviewLink</span> <span class="re0">parameter</span>=<span class="st0">"{settings.link}"</span><span class="re2">></span></span>{settings.header}<span class="sc3"><span class="re1"></wsb:be.link<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></f:section<span class="re2">></span></span></span>
...</pre></td></tr></tbody></table></div>
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<a href="https://p.cweiske.de/301#fluid-usage.xml">fluid-usage.xml</a>
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