includes/wikiengine/Render/Xhtml/Image.php
author Dan
Mon, 04 Aug 2008 11:44:20 -0400
changeset 300 614f6ff1a855
parent 1 fe660c52c48f
permissions -rw-r--r--
RNG now uses /dev/urandom instead of /dev/random to fix slowdowns during login. Potentially not as secure, but speed problems on some servers were of blocker severity.
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<?php
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// vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4:
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/**
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 * Image rule end renderer for Xhtml
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 *
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 * PHP versions 4 and 5
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 *
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 * @category   Text
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 * @package    Text_Wiki
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 * @author     Paul M. Jones <pmjones@php.net>
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 * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
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 * @version    CVS: $Id: Image.php,v 1.16 2006/02/10 23:07:03 toggg Exp $
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 * @link       http://pear.php.net/package/Text_Wiki
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 */
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/**
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 * This class inserts an image in XHTML.
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 *
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 * @category   Text
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 * @package    Text_Wiki
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 * @author     Paul M. Jones <pmjones@php.net>
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 * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
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 * @version    Release: @package_version@
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 * @link       http://pear.php.net/package/Text_Wiki
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 */
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class Text_Wiki_Render_Xhtml_Image extends Text_Wiki_Render {
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    var $conf = array(
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        'base' => '/',
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        'url_base' => null,
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        'css'  => null,
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        'css_link' => null
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    );
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    /**
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    *
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    * Renders a token into text matching the requested format.
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    *
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    * @access public
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    *
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    * @param array $options The "options" portion of the token (second
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    * element).
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    *
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    * @return string The text rendered from the token options.
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    *
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    */
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    function token($options)
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    {
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        // note the image source
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        $src = $options['src'];
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        // is the source a local file or URL?
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        if (strpos($src, '://') === false) {
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            // the source refers to a local file.
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            // add the URL base to it.
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            $src = $this->getConf('base', '/') . $src;
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        }
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        // stephane@metacites.net
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        // is the image clickable?
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        if (isset($options['attr']['link'])) {
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            // yes, the image is clickable.
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            // are we linked to a URL or a wiki page?
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            if (strpos($options['attr']['link'], '://')) {
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                // it's a URL, prefix the URL base
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                $href = $this->getConf('url_base') . $options['attr']['link'];
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            } else {
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                // it's a WikiPage; assume it exists.
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                /** @todo This needs to honor sprintf wikilinks (pmjones) */
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                /** @todo This needs to honor interwiki (pmjones) */
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                /** @todo This needs to honor freelinks (pmjones) */
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                $href = $this->wiki->getRenderConf('xhtml', 'wikilink', 'view_url') .
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                    $options['attr']['link'];
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            }
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        } else {
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            // image is not clickable.
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            $href = null;
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        }
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        // unset so it won't show up as an attribute
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        unset($options['attr']['link']);
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        // stephane@metacites.net -- 25/07/2004
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        // we make up an align="center" value for the <img> tag.
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        if (isset($options['attr']['align']) &&
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            $options['attr']['align'] == 'center') {
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            // unset so it won't show up as an attribute
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            unset($options['attr']['align']);
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            // make sure we have a style attribute
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            if (! isset($options['attr']['style'])) {
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                // no style, set up a blank one
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                $options['attr']['style'] = '';
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            } else {
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                // style exists, add a space
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                $options['attr']['style'] .= ' ';
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            }
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            // add a "center" style to the existing style.
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            $options['attr']['style'] .=
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                'display: block; margin-left: auto; margin-right: auto;';
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        }
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        // stephane@metacites.net -- 25/07/2004
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        // try to guess width and height
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        if (! isset($options['attr']['width']) &&
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            ! isset($options['attr']['height'])) {
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            // does the source refer to a local file or a URL?
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            if (strpos($src,'://')) {
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                // is a URL link
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                $imageFile = $src;
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            } elseif ($src[0] == '.') {
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            	// reg at dav-muz dot net -- 2005-03-07
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				// is a local file on relative path.
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				$imageFile = $src; # ...don't do anything because it's perfect!
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			} else {
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                // is a local file on absolute path.
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                $imageFile = $_SERVER['DOCUMENT_ROOT'] . $src;
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            }
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            // attempt to get the image size
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            $imageSize = @getimagesize($imageFile);
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            if (is_array($imageSize)) {
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                $options['attr']['width'] = $imageSize[0];
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                $options['attr']['height'] = $imageSize[1];
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            }
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        }
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        // start the HTML output
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        $output = '<img src="' . $this->textEncode($src) . '"';
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        // get the CSS class but don't add it yet
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        $css = $this->formatConf(' class="%s"', 'css');
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        // add the attributes to the output, and be sure to
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        // track whether or not we find an "alt" attribute
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        $alt = false;
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        foreach ($options['attr'] as $key => $val) {
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            // track the 'alt' attribute
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            if (strtolower($key) == 'alt') {
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                $alt = true;
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            }
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            // the 'class' attribute overrides the CSS class conf
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            if (strtolower($key) == 'class') {
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                $css = null;
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            }
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            $key = $this->textEncode($key);
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            $val = $this->textEncode($val);
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            $output .= " $key=\"$val\"";
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        }
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        // always add an "alt" attribute per Stephane Solliec
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        if (! $alt) {
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            $alt = $this->textEncode(basename($options['src']));
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            $output .= " alt=\"$alt\"";
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        }
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        // end the image tag with the automatic CSS class (if any)
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        $output .= "$css />";
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        // was the image clickable?
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        if ($href) {
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            // yes, add the href and return
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            $href = $this->textEncode($href);
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            $css = $this->formatConf(' class="%s"', 'css_link');
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            $output = "<a$css href=\"$href\">$output</a>";
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        }
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        return $output;
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    }
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}
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?>