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+<?php
+/*
+** $Id$
+**
+** Copyright (C) 1995-2007 by the ITools Authors.
+** This file is part of ITools - the Internet Tools Library
+**
+** ITools is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 3 of the License, or
+** (at your option) any later version.
+**
+** ITools is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program. If not, see <http://www.gnu.org/licenses/>.
+**
+** UltraHTML 3000 tool layer. Create functions for html tags.
+**
+** new it_html;
+** echo html(head('title' => 'hello'), body(h1('hello'), p('Hello world!')));
+**/
+
+class it_html
+{
+
+/**
+ * Create a HTML object and global functions for all methods (exlcluding
+ * methods starting with '_') in this class plus the default tags (see below).
+ *
+ * @param $p Configuration settings. Can be set/overridden in constructor, configure(), html() or head().
+ * See source code for a list of supported values
+ */
+function it_html($p = array())
+{
+ # Default configuration of html class
+ $this->p = $p + array(
+ 'charset' => 'iso-8859-1',
+ 'doctype' => null, # Custom doctype (will usually be calculated from htmltype)
+ 'head' => '', # Code to put into head() section
+ 'htmltype' => 'xhtml', # 'html' (=old-style), 'xhtml' or 'xhtml-mobile'
+ 'lang' => 'de', # Language code to use in <html lang="..."> tag
+ 'ie_png_fix' => false, # To enable, supply URL of a transparent gif (like /images/0.gif)
+ 'moretags' => '', # Comma-separated list of tag-functions to generate additionally to 'tags'
+ 'name' => 'it_html', # Name of global variable $this is assigned to (string), XXX Copy and paste in configure() to keep PHP4 compatibility
+ 'nonewlinetags' => 'a,b,em,img,input,label,span,noscript', # tags that do not like newlines after them
+ 'notexported' => 'configure,sanitize',# Those methods are not exported
+ 'prettyprint' => false, # Should output be prettily indented?
+ 'show_boot_dom' => false, # If true, append invisible <div id="it_boot_dom"> at the end of body
+ 'show_content_type' => true, # If true, add <meta http-equiv="Content-Type" ...> header
+ 'show_favicon' => true, # If true, add <link> tag to /favicon.ico if it exists
+ 'favicon' => '', # If set, add favicon <link> tag to this url
+ 'staticallycallable' => 'Q,U,select', # Those methods are statically callable (have same arguments as global stubs) but are a bit slower
+ 'tags' => 'a,b,br,button,div,em,fieldset,form,h1,h2,h3,h4,h5,h6,hr,input,label,legend,li,meta,noscript,p,span,style,table,tbody,td,textarea,tfoot,th,thead,tr,ul',
+ 'title' => '', # HTML title (default: no title added)
+ 'use_it_state' => false, # If true, generate code needed by state.js (aka 'history iframe')
+ );
+
+ # We know these doctypes. If you need something else, supply 'doctype' in p
+ $this->doctypes = array(
+ 'html' => '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">',
+ 'xhtml' => '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">',
+ 'xhtml-mobile' => '<!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN" "http://www.wapforum.org/DTD/xhtml-mobile10.dtd">'
+ );
+
+ $this->hasnonewline = array_flip(explode(',', $this->p['nonewlinetags']));
+ $notexported = array_flip(explode(',', "dummy," . $this->p['notexported'])); # dummy keeps values > 0
+
+ # Create global functions for _tags
+ foreach (array_merge(explode(',', $this->p['tags']), explode(',', $this->p['moretags'])) as $func)
+ {
+ if (!function_exists($func) && $func)
+ $code[$func] = "function $func() { \$args = func_get_args(); return \$GLOBALS['{$this->p['name']}']->_tag('$func', \$args); }";
+ }
+
+ # Create global functions for it_html methods
+ foreach (get_class_methods(get_class($this)) as $func)
+ {
+ if (!preg_match('/^_/', $func) && !is_a($this, $func) && $func && !function_exists($func) && !$notexported[$func])
+ $code[$func] = "function $func() { \$args = func_get_args(); return \$GLOBALS['{$this->p['name']}']->$func(\$args); }";
+ }
+
+ # Create global functions for methods that are statically callable (have same arguments as global stubs)
+ foreach (explode(',', $this->p['staticallycallable']) as $func)
+ {
+ if ($func && !function_exists($func))
+ $code[$func] = "function $func() { \$args = func_get_args(); return call_user_func_array(array(&\$GLOBALS['{$this->p['name']}'], '$func'), \$args); }";
+ }
+
+ eval(join('', (array)$code));
+
+ # Since name is given as param, it is our duty to store it, not our caller's.
+ $GLOBALS[$this->p['name']] =& $this;
+}
+
+
+/**
+ * Modify configuration of it_html, e.g. htmltype after it was instantiated.
+ * @param $p Configuration settings. Can be set/overridden in constructor, configure(), html() or head().
+ * See constructor for a list of supported values
+ */
+function configure($p)
+{
+ $p += array('name' => "it_html"); # XXX Copy and paste from constructor to keep PHP4 compatibility
+ $GLOBALS[$p['name']]->p = $p + (array)$GLOBALS[$p['name']]->p;
+ $GLOBALS[$p['name']]->hasnonewline = array_flip(explode(',', $GLOBALS[$p['name']]->p['nonewlinetags']));
+}
+
+/**
+ * Return doctype and entire HTML page.
+ * Example application code to render page:
+ * echo html(head(...), body(...));
+ *
+ * @param any number of text args or array of key => value pairs
+ * Defaults for key => value parameters are inherited from the it_html constructor and should be set there.
+ * The parameters are $p['lang'], $p['htmltype'] and $p['doctype']
+ */
+function html($args)
+{
+ list($data, $p) = $this->_parse_args($args);
+ $p += $this->p;
+
+ $html = ($p['doctype'] ? $p['doctype'] : $this->doctypes[$p['htmltype']]) . "\n" .
+ '<html ' . ($p['htmltype'] == "xhtml" ? 'xmlns="http://www.w3.org/1999/xhtml" ' : '') . ($p['htmltype'] == "xhtml-mobile" ? 'xml:lang' : 'lang') . "=\"{$p['lang']}\">\n" . $data . ($p['omit_endhtml'] ? '' : "</html>\n");
+
+ return EDC('upd') ? it::replace(array('<!DOCTYPE.*<head>' => ''), $html, array('singleline' => true)) : $html;
+}
+
+
+/**
+ * Return HTML header on first call or empty string on subsequent calls
+ *
+ * @param args... any number of assoc arrays and strings. strings will be content of <head>
+ * @param $p['content-type'] content type (default: "text/html; charset=iso-8859-1")
+ * @param $p['cssinline'] stylesheet to be put in header
+ * @param $p['description'] data for <meta name="description"> tag
+ * @param $p['keywords'] data for <meta name="keywords"> tag
+ * @param $p['stylesheets'] array mediatype => url of styleshests
+ * @param $p['title'] content of <title>, will be html encoded
+ */
+function head($args = array())
+{
+ if (!$this->head_sent++)
+ {
+ list($data, $p) = $this->_parse_args($args);
+
+ $p += $this->p;
+ $this->p = ($p += array('content-type' => "text/html; charset={$p['charset']}"));
+
+ $header = $p['show_content_type'] ? meta(array('http-equiv' => "Content-Type", 'content' => $p['content-type'])) : "";
+
+ # Enable latest IE mode
+ if(strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE'))
+ $header .= meta(array('http-equiv' => "X-UA-Compatible", 'content' => "IE=9"));
+
+ foreach(array('description', 'keywords') as $name)
+ if (!empty($p[$name]))
+ $header .= meta(array('name' => $name, 'content' => $p[$name]));
+
+ # Add favicon
+ if ($p['favicon'])
+ $header .= tag('link', array('rel' => "shortcut icon", 'href' => $p['favicon']));
+ elseif ($p['show_favicon'] && @file_exists($_SERVER['DOCUMENT_ROOT'] . '/favicon.ico'))
+ $header .= tag('link', array('rel' => "shortcut icon", 'href' => "/favicon.ico"));
+
+ foreach((array)$p['stylesheets'] as $type => $url)
+ $header .= tag('link', array('rel' => "stylesheet", 'type' => "text/css", 'href' => $url) + (is_int($type) ? array() : array('media' => $type)));
+
+ if (!empty($p['cssinline']))
+ $header .= tag('style', array('type' => "text/css", "\n" . preg_replace(array('/\s*\/\*[^\*]+\*\//Um', '/\s*\{\s*/', '/;\s+/'), array('', '{', ';'), $p['cssinline'])));
+
+ $header .= $p['head'] . ($p['title'] ? tag('title', strip_tags(Q(strip_tags($p['title'])))) : ""); # remove coloring by .texts and .q debug param
+
+ if($this->p['htmltype'] == "xhtml-mobile" && strpos($_SERVER['HTTP_USER_AGENT'], 'W3C_Validator'))
+ header("Content-Type: application/xhtml+xml; charset={$this->p['charset']}"); # for validation
+ else if (!headers_sent()) # prevent warnings when ED() in use
+ header("Content-Type: " . $p['content-type']);
+
+ $js = isset($p['jsenv']) ? "var env = " . itjs::serialize($p['jsenv']) . ";\n" : '';
+ if ($GLOBALS['it_html']->p['charset'] == "iso-8859-1")
+ $js = it_html::latinize($js);
+
+ $js .= $this->_itjs($p['jsinline'], 'inline');
+
+ if ($p['js'])
+ {
+ $checksum = itjs::checksum(itjs::filenames($p['js']));
+ $js .= $this->_itjs("boot.js", "inline");
+ $js .= "function it_boot_start(){ " . trim($p['jsboot']) . " }\n";
+ $js .= "it_boot('/itjs/" . U($p['js'], array('s' => $checksum)) . "');\n";
+ }
+
+ if ($js)
+ $data .= $this->js(array($js));
+
+ return tag('head', $header, $data);
+ }
+}
+
+
+/**
+ * Return HTML head (if not already sent) and body with it_state and it_boot magic code
+ */
+function body($args)
+{
+ if ($this->p['use_it_state'])
+ array_unshift($args, tag('iframe', array('id' => "it_state", 'src' => "/itjs/state.html", 'width' => 1, 'height' => 1, 'frameborder' => 0)));
+
+ if (EDC('what'))
+ {
+ $debugvars = array_merge($GLOBALS['ULTRADEBUGVARS'], array('srclines' => 1, 'texts' => 1));
+ ksort($debugvars);
+ foreach ($debugvars as $var => $dummy)
+ {
+ if (EDC($var))
+ $toggled_host = preg_replace("/$var\./", "", $_SERVER['HTTP_HOST']);
+ else
+ $toggled_host = preg_replace("/\.([^.]*)\.([^.]*)\.([^.]*)$/", ".$var.\$1.\$2.\$3", $_SERVER['HTTP_HOST']);
+ $debug_links[] = a(array('href' => U('http://' . $toggled_host . $_SERVER['REQUEST_URI']), 'style' => 'font-weight:' . (EDC($var) ? 'bold' : 'normal') . ';'), $var);
+ }
+ $args[] = div(array('style' => 'font-family:monospace;'), "Debugvars: " . join(" ", $debug_links));
+ }
+
+ if ($this->p['show_boot_dom'])
+ $args[] = div(array('id' => "it_boot_dom", 'style' => "visibility:hidden"));
+
+ return $this->head() . $this->_tag('body', $args);
+}
+
+
+/**
+ * INTERNAL: Parse an arg array (mixed key=>value pairs and strings) and return it
+ * as array(0 => all numerical args concatenated, 1 => array(key=>value pairs)
+ */
+function _parse_args($args)
+{
+ $p = array();
+ foreach ($args as $arg)
+ {
+ if (is_array($arg))
+ {
+ foreach ($arg as $key => $value)
+ {
+ if (is_int($key))
+ $data .= it_taintcheck($value);
+ else
+ $p[$key] = $value;
+ }
+ }
+ else
+ $data .= it_taintcheck($arg);
+ }
+
+ return array($data, $p);
+}
+
+
+/**
+ * function div($args...)
+ * Return a <div>...</div> element
+ * Any strings in the argument list will be content of the <div>
+ * Any associative arrays among the arguments will create attributes for <div>.
+ * Attributes with values false or null will be omitted completely.
+ * Attributes with value true can be used for boolean attributes like 'checked'
+ * Attribute values will be html encoded, content values won't so you may need to use Q().
+ * @see _tag()
+ */ #:}
+
+/**
+ * INTERNAL: Create html tag from name and args array (the arguments of the parent function)
+ */
+function _tag($name, $args)
+{
+ list($data, $attr) = $this->_parse_args($args);
+
+ $newline = isset($this->hasnonewline[$name]) ? "" : "\n";
+
+ # Ultra XML PrettyPrinter 3000 [\] by SCA
+ if ($this->p['prettyprint'] && $newline && (substr($data, -1, 1) == "\n") && (strpos($data, '<textarea') === false && strpos($data, '<pre') === false) && ($data != strip_tags($data)))
+ $data = str_replace("\n", "\n ", "\n" . trim($data)) . "\n";
+
+ # debugging aid: add backtrace
+ if (($levels = intval($GLOBALS['debug_srclines'])) && !it::match('^(head|meta|title|script|style|link)', $name))
+ $attr = array('title' => it_debug::backtrace(array('levels' => max(3, $levels), 'skipfiles' => "_html\\.class"))) + $attr;
+
+ $result .= "<$name";
+
+ # add attributes. If $value === true, use key only (<td nowrap> instead of <td nowrap=""> for old html, <td nowrap="nowrap"> for xhtml style)
+ foreach($attr as $key => $value)
+ {
+ if (($value === null) || ($value === false)) # null or false: omit whole tag
+ ;
+ else if (isset($value) && $value !== true) # normal case: value
+ {
+ if (preg_match('/[<>&"\x00-\x08\x0a-\x0c\x0e-\x1f\x80-\x9f]/', $value)) # WARNING: copy/pasted from Q()
+ $result .= " $key=\"" . str_replace("\n", "&#10;", htmlspecialchars($GLOBALS['it_html']->p['charset'] == "iso-8859-1" ? it_html::latinize($value) : $value, ENT_COMPAT, $GLOBALS['it_html']->p['charset'])) . '"';
+ else
+ $result .= " $key=\"$value\"";
+ }
+ else # true: tag without value
+ $result .= ($this->p['htmltype'] == 'html') ? " $key" : " $key=\"$key\"";
+ }
+
+ # Apply a kind of magic... this needs further investigation
+ if (isset($data) || preg_match('/^(a|div|iframe|pre|script|span|tbody|td|tfoot|thead|textarea)$/i', $name))
+ $result .= ">$data</$name>$newline";
+ elseif ($this->p['htmltype'] == 'html')
+ $result .= ">$newline";
+ else
+ $result .= " />$newline";
+
+ return $result;
+}
+
+
+/**
+ * Return a <tag> containing optional data.
+ * @param $name tag name ('style', etc.)
+ * @param ... any number optional data or array of key => value arguments
+ * @return string containing XML/HTML tag
+ */
+function tag($args)
+{
+ $name = array_shift($args);
+ return $this->_tag($name, $args);
+}
+
+/**
+ * Special img() function patches png transparency for IE 5.5-6 if ie_png_fix is set
+ * @param ... any number optional data or array of key => value arguments
+ * @return <img ... />
+ */
+function img($args)
+{
+ if ($this->p['ie_png_fix'] && preg_match('/MSIE [56]/', $_SERVER['HTTP_USER_AGENT']))
+ {
+ foreach($args as $id => $arg)
+ if (preg_match('/\.png(\?.*)?$/', $arg['src']))
+ {
+ $args[$id]['style'] = "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='{$arg['src']}',sizingMethod='crop');" . $arg['style'];
+ $args[$id]['src'] = $this->p['ie_png_fix'];
+ }
+ }
+
+ foreach ($args as $arg)
+ $havealt += isset($arg['alt']);
+
+ if (!$havealt)
+ it::error('img() needs alt');
+
+ return $this->_tag("img", $args);
+}
+
+
+/**
+ * Create a dropdown menu object. Warning: encodes html code within options!
+ * @param $tags key => value pairs of <select> tag
+ * @param $options array (value => text) of available options or
+ * string key:val{,key:val} where key will be rawurldecoded so it may contain %2C as comma
+ * supports optgroups as array (value => optgroup => array(value => text))
+ * @param $selected optional currently selected value, or comma-separated list or array for multi-select
+ * Note: use tag('select') and tag('option') if you want do roll your own
+ */
+function select($tags, $options, $selected = null)
+{
+ # Transmogrify key:val{,key:val} to array(key => val)
+ if (!is_array($options))
+ {
+ $opts = explode(',', $options);
+ $options = array();
+
+ foreach($opts as $opt)
+ {
+ list($key, $value) = explode(':', $opt);
+ $options[rawurldecode($key)] = $value;
+ }
+ }
+
+ $selected = ($tags['multiple'] && is_string($selected)) ? explode(',', $selected) : (array)$selected;
+
+ $html = "";
+ foreach($options as $value => $option)
+ {
+ if (is_array($option))
+ {
+ $grouphtml = "";
+ foreach($option as $optval => $opt)
+ $grouphtml .= $this->_tag("option", array(array('value' => $optval, 'selected' => in_array((string)$optval, $selected)), self::_strip_tags(Q(self::_strip_tags($opt)))));
+ $html .= $this->_tag("optgroup", array(array('label' => $value, $grouphtml)));
+ }
+ else
+ $html .= $this->_tag("option", array(array('value' => $value, 'selected' => in_array((string)$value, $selected), 'disabled' => $option === ""), (trim($option) === "") ? "&nbsp;" : self::_strip_tags(Q(self::_strip_tags($option))))); # self::_strip_tags removes .q debug param coloring
+ }
+
+ return $this->_tag("select", array($tags, $html));
+}
+
+# internal: strip spans added by debug params
+function _strip_tags($html)
+{
+ return preg_replace('!</?(span|a)\b[^>]*>!', '', $html);
+}
+
+/**
+ * Return HTML with all evil things stripped. Allowed are a coupld of simple
+ * tags like div, p, i, b, br without attributes, a with absolute href,
+ * img with absolute src url. Also ensures that tags are balanced.
+ * @param $html HTML string to be sanitized
+ * @return Sanitized HTML
+ */
+function sanitize($html)
+{
+ $result = "";
+ $html = it::replace(array('[\0\s]+' => " "), $html); # \s also matches \r and \n
+ $urlpattern = 'https?://[^">]+';
+ $charset = $GLOBALS['it_html']->p['charset'] ? $GLOBALS['it_html']->p['charset'] : 'iso-8859-1';
+
+ if ($tag = it::match("(.*)<(div|p|i|b)\b[^>]*>(.*?)</\\2>(.*)", $html))
+ {
+ # Simple tags with content, no attributes kept
+ list($head, $tagname, $content, $tail) = $tag;
+ $tagname = strtolower($tagname);
+ $result .= it_html::sanitize($head) . "<$tagname>" . it_html::sanitize($content) . "</$tagname>" . it_html::sanitize($tail);
+ }
+ else if ($tag = it::match('(.*)<a\b[^>]+?href="(' . $urlpattern . ')"[^>]*?>(.*?)</a>(.*)', $html))
+ {
+ # Link tags, keeps only href attribute
+ list($head, $href, $content, $tail) = $tag;
+ $result .= it_html::sanitize($head) . '<a href="' . it_html::Q(it_html::U(html_entity_decode($href, ENT_COMPAT, $charset))) . '">' . it_html::sanitize($content) . "</a>" . it_html::sanitize($tail);
+ }
+ else if ($tag = it::match('(.*)<img\b[^>]+?src="(' . $urlpattern . ')"[^>]*?>(.*)', $html))
+ {
+ # Image tags, keeps only src attribute
+ list($head, $src, $tail) = $tag;
+ $result .= it_html::sanitize($head) . '<img src="' . it_html::Q(it_html::U(html_entity_decode($src, ENT_COMPAT, $charset))) . '" alt="" />' . it_html::sanitize($tail);
+ }
+ else if ($tag = it::match("(.*)<(br|/tr)\b[^>]*>(.*)", $html))
+ {
+ # brs and table rows are converted so simple line breaks
+ list($head, $tagname, $tail) = $tag;
+ $result .= it_html::sanitize($head) . "<br />" . it_html::sanitize($tail);
+ }
+ else
+ $result = it::replace(array('&amp;(#\d+;)' => '&$1'), it_html::Q(html_entity_decode(strip_tags($html), ENT_COMPAT, $charset)));
+
+ return $GLOBALS['debug_q'] ? "<span style='background:#8FF'>$result</span>" : $result;
+}
+
+/**
+ * Decode all entities, ensure latin-1 encoding
+ */
+function entity_decode($string)
+{
+ $string = preg_replace('/&#(8217|65533);/', "'", html_entity_decode($string));
+ $string = preg_replace_callback('/&#x0*([0-9a-f]+);/i', function($m) { return hexdec($m[1]) <= 255 ? chr(hexdec($m[1])) : " "; }, $string);
+ $string = preg_replace_callback('/&#0*([0-9]+);/', function($m) { return $m[1] <= 255 ? chr($m[1]) : " "; }, $string);
+
+ return $string;
+}
+
+/**
+ * Replace or remove all illegal characters from a latin-1 string
+ */
+function latinize($string)
+{
+ return preg_replace('/[\x00-\x08\x0b-\x0c\x0e-\x1f\x80-\x9f]/', ' ', strtr($string, array("\x80" => "EUR", "\x82" => "'", "\x84" => "\"", "\x85" => "...", "\x8a" => "S", "\x8c" => "OE", "\x8e" => "Z", "\x91" => "'", "\x92" => "'", "\x93" => "\"", "\x94" => "\"", "\x96" => "-", "\x97" => "-", "\x9a" => "s", "\x9e" => "z")));
+}
+
+/**
+ * Shortcut: return htmlspecialchars($string) and encode forbidden characters 80-9f if latin1 is output
+ * @param $string String to encode with htmlspecialchars()
+ * @return htmlspecialchars($string)
+ */
+function Q($string)
+{
+ if (preg_match('/[<>&"\x00-\x08\x0a-\x0c\x0e-\x1f\x80-\x9f]/', $string)) # WARNING: copy/pasted to _tag()
+ $string = htmlspecialchars($GLOBALS['it_html']->p['charset'] == "iso-8859-1" ? it_html::latinize($string) : $string, ENT_COMPAT, $GLOBALS['it_html']->p['charset']);
+
+ return $GLOBALS['debug_q'] && $string ? "<span style='background:#8FF'>$string</span>" : $string;
+}
+
+
+/**
+ * Build a complete url from base-url and params
+ * @param ... scalar args and numeric indices build base-url, rest as params
+ */
+function U(/* ... */)
+{
+ $args = func_get_args();
+ list($base, $params) = it_html::_parse_args($args);
+
+ if (!isset($base))
+ $base = preg_replace('/\?.*/', '', $_SERVER['REQUEST_URI']);
+
+ $base = preg_replace(array('|\0|', '/\\\\/'), array('', '/'), $base); # kill null chars, turn \ to /
+
+ if (!($u = @parse_url($base)))
+ list($u['path'], $u['query']) = explode("?", $base, 2);
+
+ $u['host'] = preg_match('/[^-_.0-9a-z]/i', $u['host']) && function_exists('idn_to_ascii') && ($idnahost = idn_to_ascii($GLOBALS['it_html']->p['charset'] == "iso-8859-1" ? utf8_encode($u['host']) : $u['host'])) ? $idnahost : $u['host']; # Punycode hostname to include into webpage
+ $u['host'] = preg_replace_callback('/[^-_.0-9a-z\x80-\xff]/i', function($m) { return rawurlencode($m[0]); }, $u['host']); # Encode garbage chars in host
+
+ # handle scheme, user (urlencoded), password, host
+ $hostpart =
+ ($u['user'] ? preg_replace_callback('|[^-a-z0-9_.+!*(),:?@&=/~$%#]|i', function($m) { return urlencode($m[0]); }, $u['user'] . ($u['pass'] ? ":" . $u['pass'] : "") . "@") : "") .
+ ($u['host'] ? $u['host'] : "") .
+ ($u['port'] ? ":" . intval($u['port']) : "");
+
+ $schemepart = $hostpart ? ($u['scheme'] ? $u['scheme'] . ":" : "") . "//$hostpart" : "";
+
+ $path = $u['path'] . ($u['query'] ? "?" . $u['query'] : "") . ($u['fragment'] ? "#" . $u['fragment'] : "");
+
+ # hack: encode % if not followed by two hex digits
+ $parts = preg_split('/%([^%]{0,2})/', $path, -1, PREG_SPLIT_DELIM_CAPTURE);
+ for ($i = 1; $i < count($parts); $i+=2)
+ $parts[$i] = (preg_match('/[0-9a-f][0-9a-f]/i', $parts[$i]) ? "%" : "%25") . $parts[$i];
+ $path = join("", $parts);
+
+ $path = preg_replace_callback('|[^-a-z0-9_.+!*(),:?@&=/~$%#]|i', function($m) { return urlencode($m[0]); }, $path);
+ $path = preg_replace('|^([a-z0-9_]+:)?//[^/]*$|', '$0/', $path); # Add slash if absolute url without a path, e.g. http://gna.ch
+ $queryparams = it_url::params($params);
+ $separator = strpos($path, "?") === false ? "?" : "&";
+
+ return $schemepart . $path . ($queryparams ? "$separator$queryparams" : "");
+}
+
+
+/**
+ * Insert a javascript script
+ * @param ... any number optional data or array of key => value arguments
+ * @return <script type="text/javascript"...>...</script>
+ */
+function js($args)
+{
+ if (($this->p['htmltype'] != 'html') && $args[0] && ((array)$args[0] === array_values((array)$args[0])))
+ {
+ array_unshift($args, "<!--//--><![CDATA[//><!--\n");
+ $args[] = "\n//--><!]]>";
+ }
+
+ array_unshift($args, array('type' => 'text/javascript'));
+ return $this->_tag('script', $args);
+}
+
+
+/**
+ * Include javascript code or generate HTML to include it
+ */
+function _itjs($files, $mode)
+{
+ $result = "";
+
+ if ($files)
+ {
+ $filenames = itjs::filenames($files);
+
+ if ($mode == "files")
+ {
+ foreach ($filenames as $file)
+ $result .= tag('script', array('type' => "text/javascript", 'src' => "/itjs/" . basename($file) . "?v=" . itjs::checksum($file)));
+ }
+ else if ($mode == "inline")
+ {
+ $jsfile = "";
+
+ foreach ($filenames as $file)
+ $jsfile .= @file_get_contents($file);
+
+ $result .= itjs::strip($jsfile);
+ }
+ else
+ $result .= tag('script', array('type' => "text/javascript", 'src' => "/itjs/$files?v=" . itjs::checksum($filenames)));
+ }
+
+ return $result;
+}
+
+}
+?>