mod/hotpot/template/default.php

   1 <?PHP
   2 class hotpot_xml_template_default {
   3     function read_template($filename, $tag='temporary') {
   4         // create the file path to the template
   5         $filepath = $this->parent->template_dirpath.DIRECTORY_SEPARATOR.$filename;
   6         // try and open the template file
   7         if (!file_exists($filepath) || !is_readable($filepath)) {
   8             $msg = 'Could not open the '.$this->parent->template_dir.' template file &quot;'.$filepath.'&quot;';
   9             error($msg, $this->parent->course_homeurl);
  10         }
  11         // read in the template and close the file
  12         $this->$tag = file_get_contents($filepath);
  13         // expand the blocks and strings in the template
  14         $this->expand_blocks($tag);
  15         $this->expand_strings($tag);
  16         if ($tag=='temporary') {
  17             $template = $this->$tag;
  18             $this->$tag = '';
  19             return $template;
  20         }
  21     }
  22     function expand_blocks($tag) {
  23         // get block $names
  24         //  [1] the full block name (including optional leading 'str' or 'incl')
  25         //  [2] leading 'incl' or 'str', if any
  26         //  [3] the real block name ([1] without [2])
  27         $search = '/\[\/((incl|str)?((?:\w|\.)+))\]/';
  28         preg_match_all($search, $this->$tag, $names);
  29         $i_max = count($names[0]);
  30         for ($i=0; $i<$i_max; $i++) {
  31             $method = $this->parent->template_dir.'_expand_'.str_replace('.', '', $names[3][$i]);
  32             if (method_exists($this, $method)) {
  33                 eval('$value=$this->'.$method.'();');
  34                 $search = '/\['.$names[1][$i].'\](.*?)\[\/'.$names[1][$i].'\]/s';
  35                 preg_match_all($search, $this->$tag, $blocks);
  36                 $ii_max = count($blocks[0]);
  37                 for ($ii=0; $ii<$ii_max; $ii++) {
  38                     $replace = empty($value) ? '' : $blocks[1][$ii];
  39                     $this->$tag = str_replace($blocks[0][$ii], $replace, $this->$tag);
  40                 }
  41             } else {
  42                 $msg = 'Template block expand method not found: &quot;'.$method.'&quot;';
  43                 error($msg, $this->parent->course_homeurl);
  44             }
  45         }
  46     }
  47     function expand_strings($tag, $search='') {
  48         if (empty($search)) {
  49             // default $search $pattern
  50             $search = '/\[(?:bool|int|str)(\\w+)\]/';
  51         }
  52         preg_match_all($search, $this->$tag, $matches);
  53         $i_max = count($matches[0]);
  54         for ($i=0; $i<$i_max; $i++) {
  55             $method = $this->parent->template_dir.'_expand_'.$matches[1][$i];
  56             if (method_exists($this, $method)) {
  57                 eval('$replace=$this->'.$method.'();');
  58                 $this->$tag = str_replace($matches[0][$i], $replace, $this->$tag);
  59             }
  60         }
  61     }
  62     function bool_value($tags, $more_tags="[0]['#']") {
  63         $value = $this->parent->xml_value($tags, $more_tags);
  64         return empty($value) ? 'false' : 'true';
  65     }
  66     function int_value($tags, $more_tags="[0]['#']") {
  67         return intval($this->parent->xml_value($tags, $more_tags));
  68     }
  69     function js_value($tags, $more_tags="[0]['#']", $convert_to_unicode=false) {
  70         return $this->js_safe($this->parent->xml_value($tags, $more_tags), $convert_to_unicode);
  71     }
  72     function js_safe($str, $convert_to_unicode=false) {
  73         // encode a string for javascript
  74         // decode "<" and ">" - not necesary as it was done by xml_value()
  75         // $str  = strtr($str, array('&#x003C;' => '<', '&#x003E;' => '>'));
  76         // escape single quotes and backslashes
  77         $str = strtr($str, array("'"=>"\\'", '\\'=>'\\\\'));
  78         // convert newlines (win = "\r\n", mac="\r", linix/unix="\n")
  79         $nl = '\\n'; // javascript newline
  80         $str = strtr($str, array("\r\n"=>$nl, "\r"=>$nl, "\n"=>$nl));
  81         // convert (hex and decimal) html entities to unicode, if required
  82         if ($convert_to_unicode) {
  83             $str = preg_replace('|&#x([0-9A-F]+);|i', '\\u\\1', $str);
  84             $str = preg_replace('|&#(\d+);|e', "'\\u'.sprintf('%04X', '\\1')", $str);
  85         }
  86         return $str;
  87     }
  88     function get_halfway_color($x, $y) {
  89         // returns the $color that is half way between $x and $y
  90         $color = $x; // default
  91         $rgb = '/^\#?([0-9a-f])([0-9a-f])([0-9a-f])$/i';
  92         $rrggbb = '/^\#?([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})$/i';
  93         if ((
  94             preg_match($rgb, $x, $x_matches) ||
  95             preg_match($rrggbb, $x, $x_matches)
  96         ) && (
  97             preg_match($rgb, $y, $y_matches) ||
  98             preg_match($rrggbb, $y, $y_matches)
  99         )) {
 100             $color = '#';
 101             for ($i=1; $i<=3; $i++) {
 102                 $x_dec = hexdec($x_matches[$i]);
 103                 $y_dec = hexdec($y_matches[$i]);
 104                 $color .= sprintf('%02x', min($x_dec, $y_dec) + abs($x_dec-$y_dec)/2);
 105             }
 106         }
 107         return $color;
 108     }
 109 }
 110 ?>