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   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  class cssparser {
  18    private $css;
  19    private $html;
  20  
  21    function cssparser($html = true) {
  22      // Register "destructor"
  23      core_shutdown_manager::register_function(array(&$this, "finalize"));
  24      $this->html = ($html != false);
  25      $this->Clear();
  26    }
  27  
  28    function finalize() {
  29      unset($this->css);
  30    }
  31  
  32    function Clear() {
  33      unset($this->css);
  34      $this->css = array();
  35      if($this->html) {
  36        $this->Add("ADDRESS", "");
  37        $this->Add("APPLET", "");
  38        $this->Add("AREA", "");
  39        $this->Add("A", "text-decoration : underline; color : Blue;");
  40        $this->Add("A:visited", "color : Purple;");
  41        $this->Add("BASE", "");
  42        $this->Add("BASEFONT", "");
  43        $this->Add("BIG", "");
  44        $this->Add("BLOCKQUOTE", "");
  45        $this->Add("BODY", "");
  46        $this->Add("BR", "");
  47        $this->Add("B", "font-weight: bold;");
  48        $this->Add("CAPTION", "");
  49        $this->Add("CENTER", "");
  50        $this->Add("CITE", "");
  51        $this->Add("CODE", "");
  52        $this->Add("DD", "");
  53        $this->Add("DFN", "");
  54        $this->Add("DIR", "");
  55        $this->Add("DIV", "");
  56        $this->Add("DL", "");
  57        $this->Add("DT", "");
  58        $this->Add("EM", "");
  59        $this->Add("FONT", "");
  60        $this->Add("FORM", "");
  61        $this->Add("H1", "");
  62        $this->Add("H2", "");
  63        $this->Add("H3", "");
  64        $this->Add("H4", "");
  65        $this->Add("H5", "");
  66        $this->Add("H6", "");
  67        $this->Add("HEAD", "");
  68        $this->Add("HR", "");
  69        $this->Add("HTML", "");
  70        $this->Add("IMG", "");
  71        $this->Add("INPUT", "");
  72        $this->Add("ISINDEX", "");
  73        $this->Add("I", "font-style: italic;");
  74        $this->Add("KBD", "");
  75        $this->Add("LINK", "");
  76        $this->Add("LI", "");
  77        $this->Add("MAP", "");
  78        $this->Add("MENU", "");
  79        $this->Add("META", "");
  80        $this->Add("OL", "");
  81        $this->Add("OPTION", "");
  82        $this->Add("PARAM", "");
  83        $this->Add("PRE", "");
  84        $this->Add("P", "");
  85        $this->Add("SAMP", "");
  86        $this->Add("SCRIPT", "");
  87        $this->Add("SELECT", "");
  88        $this->Add("SMALL", "");
  89        $this->Add("STRIKE", "");
  90        $this->Add("STRONG", "");
  91        $this->Add("STYLE", "");
  92        $this->Add("SUB", "");
  93        $this->Add("SUP", "");
  94        $this->Add("TABLE", "");
  95        $this->Add("TD", "");
  96        $this->Add("TEXTAREA", "");
  97        $this->Add("TH", "");
  98        $this->Add("TITLE", "");
  99        $this->Add("TR", "");
 100        $this->Add("TT", "");
 101        $this->Add("UL", "");
 102        $this->Add("U", "text-decoration : underline;");
 103        $this->Add("VAR", "");
 104      }
 105    }
 106  
 107    function SetHTML($html) {
 108      $this->html = ($html != false);
 109    }
 110  
 111    function Add($key, $codestr) {
 112      $key = strtolower($key);
 113      $codestr = strtolower($codestr);
 114      if(!isset($this->css[$key])) {
 115        $this->css[$key] = array();
 116      }
 117      $codes = explode(";",$codestr);
 118      if(count($codes) > 0) {
 119        $codekey=''; $codevalue='';
 120        foreach($codes as $code) {
 121          $code = trim($code);
 122          $this->assignValues(explode(":",$code),$codekey,$codevalue);
 123          if(strlen($codekey) > 0) {
 124            $this->css[$key][trim($codekey)] = trim($codevalue);
 125          }
 126        }
 127      }
 128    }
 129  
 130    private function assignValues($arr,&$val1,&$val2) {
 131        $n = count($arr);
 132        if ($n > 0) {
 133            $val1=$arr[0];
 134            $val2=($n > 1) ? $arr[1] : '';
 135        }
 136    }
 137    function Get($key, $property) {
 138      $key = strtolower($key);
 139      $property = strtolower($property);
 140      $tag='';$subtag='';$class='';$id='';
 141      $this->assignValues(explode(":",$key),$tag,$subtag);
 142      $this->assignValues(explode(".",$tag),$tag,$class);
 143      $this->assignValues(explode("#",$tag),$tag,$id);
 144      $result = "";
 145      $_subtag=''; $_class=''; $_id='';
 146      foreach($this->css as $_tag => $value) {
 147        $this->assignValues(explode(":",$_tag),$_tag,$_subtag);
 148        $this->assignValues(explode(".",$_tag),$_tag,$_class);
 149        $this->assignValues(explode("#",$_tag),$_tag,$_id);
 150  
 151        $tagmatch = (strcmp($tag, $_tag) == 0) | (strlen($_tag) == 0);
 152        $subtagmatch = (strcmp($subtag, $_subtag) == 0) | (strlen($_subtag) == 0);
 153        $classmatch = (strcmp($class, $_class) == 0) | (strlen($_class) == 0);
 154        $idmatch = (strcmp($id, $_id) == 0);
 155  
 156        if($tagmatch & $subtagmatch & $classmatch & $idmatch) {
 157          $temp = $_tag;
 158          if((strlen($temp) > 0) & (strlen($_class) > 0)) {
 159            $temp .= ".".$_class;
 160          } elseif(strlen($temp) == 0) {
 161            $temp = ".".$_class;
 162          }
 163          if((strlen($temp) > 0) & (strlen($_subtag) > 0)) {
 164            $temp .= ":".$_subtag;
 165          } elseif(strlen($temp) == 0) {
 166            $temp = ":".$_subtag;
 167          }
 168          if(isset($this->css[$temp][$property])) {
 169            $result = $this->css[$temp][$property];
 170          }
 171        }
 172      }
 173      return $result;
 174    }
 175  
 176    function GetSection($key) {
 177      $key = strtolower($key);
 178      $tag='';$subtag='';$class='';$id='';
 179      $_subtag=''; $_class=''; $_id='';
 180  
 181      $this->assignValues(explode(":",$key),$tag,$subtag);
 182      $this->assignValues(explode(".",$tag),$tag,$class);
 183      $this->assignValues(explode("#",$tag),$tag,$id);
 184      $result = array();
 185      foreach($this->css as $_tag => $value) {
 186        $this->assignValues(explode(":",$_tag),$_tag,$_subtag);
 187        $this->assignValues(explode(".",$_tag),$_tag,$_class);
 188        $this->assignValues(explode("#",$_tag),$_tag,$_id);
 189  
 190        $tagmatch = (strcmp($tag, $_tag) == 0) | (strlen($_tag) == 0);
 191        $subtagmatch = (strcmp($subtag, $_subtag) == 0) | (strlen($_subtag) == 0);
 192        $classmatch = (strcmp($class, $_class) == 0) | (strlen($_class) == 0);
 193        $idmatch = (strcmp($id, $_id) == 0);
 194  
 195        if($tagmatch & $subtagmatch & $classmatch & $idmatch) {
 196          $temp = $_tag;
 197          if((strlen($temp) > 0) & (strlen($_class) > 0)) {
 198            $temp .= ".".$_class;
 199          } elseif(strlen($temp) == 0) {
 200            $temp = ".".$_class;
 201          }
 202          if((strlen($temp) > 0) & (strlen($_subtag) > 0)) {
 203            $temp .= ":".$_subtag;
 204          } elseif(strlen($temp) == 0) {
 205            $temp = ":".$_subtag;
 206          }
 207          foreach($this->css[$temp] as $property => $value) {
 208            $result[$property] = $value;
 209          }
 210        }
 211      }
 212      return $result;
 213    }
 214  
 215    function ParseStr($str) {
 216      $this->Clear();
 217      // Remove comments
 218      $str = preg_replace("/\/\*(.*)?\*\//Usi", "", $str);
 219      // Parse this damn csscode
 220      $parts = explode("}",$str);
 221      if(count($parts) > 0) {
 222        foreach($parts as $part) {
 223          $keystr='';$codestr='';
 224          $this->assignValues(explode("{",$part),$keystr,$codestr);
 225          $keys = explode(",",trim($keystr));
 226          if(count($keys) > 0) {
 227            foreach($keys as $key) {
 228              if(strlen($key) > 0) {
 229                $key = str_replace("\n", "", $key);
 230                $key = str_replace("\\", "", $key);
 231                $this->Add($key, trim($codestr));
 232              }
 233            }
 234          }
 235        }
 236      }
 237      //
 238      return (count($this->css) > 0);
 239    }
 240  
 241    function Parse($filename) {
 242      $this->Clear();
 243      if(file_exists($filename)) {
 244        return $this->ParseStr(file_get_contents($filename));
 245      } else {
 246        return false;
 247      }
 248    }
 249  
 250    function GetCSS() {
 251      $result = "";
 252      foreach($this->css as $key => $values) {
 253        $result .= $key." {\n";
 254        foreach($values as $key => $value) {
 255          $result .= "  $key: $value;\n";
 256        }
 257        $result .= "}\n\n";
 258      }
 259      return $result;
 260    }
 261  }