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   1  <?php
   2  //=======================================================================
   3  // File:    JPGRAPH_ERRHANDLER.PHP
   4  // Description:    Error handler class together with handling of localized
   5  //        error messages. All localized error messages are stored
   6  //        in a separate file under the "lang/" subdirectory.
   7  // Created:     2006-09-24
   8  // Ver:        $Id: jpgraph_errhandler.inc.php 856 2007-03-23 07:17:02Z ljp $
   9  //
  10  // Copyright 2006 (c) Aditus Consulting. All rights reserved.
  11  //========================================================================
  12  
  13  
  14  GLOBAL $__jpg_err_locale ;
  15  $__jpg_err_locale = DEFAULT_ERR_LOCALE;
  16  
  17  class ErrMsgText {
  18      private $lt=NULL;
  19      function ErrMsgText() {
  20      GLOBAL $__jpg_err_locale;
  21      $file = 'lang/'.$__jpg_err_locale.'.inc.php';
  22  
  23      // If the chosen locale doesn't exist try english
  24      if( !file_exists(dirname(__FILE__).'/'.$file) ) {
  25          $__jpg_err_locale = 'en';
  26      }
  27  
  28      $file = 'lang/'.$__jpg_err_locale.'.inc.php';
  29      if( !file_exists(dirname(__FILE__).'/'.$file) ) {
  30          die('Chosen locale file ("'.$file.'") for error messages does not exist or is not readable for the PHP process. Please make sure that the file exists and that the file permissions are such that the PHP process is allowed to read this file.');
  31      }
  32      require_once($file);
  33      $this->lt = $_jpg_messages;
  34      }
  35  
  36      function Get($errnbr,$a1=null,$a2=null,$a3=null,$a4=null,$a5=null) {
  37      GLOBAL $__jpg_err_locale;
  38      if( !isset($this->lt[$errnbr]) ) {
  39          return 'Internal error: The specified error message ('.$errnbr.') does not exist in the chosen locale ('.$__jpg_err_locale.')';
  40      }
  41      $ea = $this->lt[$errnbr];
  42      $j=0;
  43      if( $a1 !== null ) {
  44          $argv[$j++] = $a1;
  45          if( $a2 !== null ) {
  46          $argv[$j++] = $a2;
  47          if( $a3 !== null ) {
  48              $argv[$j++] = $a3;
  49              if( $a4 !== null ) {
  50              $argv[$j++] = $a4;
  51              if( $a5 !== null ) {
  52                  $argv[$j++] = $a5;
  53              }
  54              }
  55          }
  56          }
  57      }
  58      $numargs = $j; 
  59      if( $ea[1] != $numargs ) {
  60          // Error message argument count do not match.
  61          // Just return the error message without arguments.
  62          return $ea[0];
  63      }
  64      switch( $numargs ) {
  65          case 1:
  66          $msg = sprintf($ea[0],$argv[0]);
  67          break;
  68          case 2:
  69          $msg = sprintf($ea[0],$argv[0],$argv[1]);
  70          break;
  71          case 3:
  72          $msg = sprintf($ea[0],$argv[0],$argv[1],$argv[2]);
  73          break;
  74          case 4:
  75          $msg = sprintf($ea[0],$argv[0],$argv[1],$argv[2],$argv[3]);
  76          break;
  77          case 5:
  78          $msg = sprintf($ea[0],$argv[0],$argv[1],$argv[2],$argv[3],$argv[4]);
  79          break;
  80          case 0:
  81          default:
  82          $msg = sprintf($ea[0]);
  83          break;
  84      }
  85      return $msg;
  86      }
  87  }
  88  
  89  //
  90  // A wrapper class that is used to access the specified error object
  91  // (to hide the global error parameter and avoid having a GLOBAL directive
  92  // in all methods.
  93  //
  94  class JpGraphError {
  95      private static $__jpg_err;
  96      public static function Install($aErrObject) {
  97      self::$__jpg_err = new $aErrObject;
  98      }
  99      public static function Raise($aMsg,$aHalt=true){
 100      self::$__jpg_err->Raise($aMsg,$aHalt);
 101      }
 102      public static function SetErrLocale($aLoc) {
 103      GLOBAL $__jpg_err_locale ;
 104      $__jpg_err_locale = $aLoc;
 105      }
 106      public static function RaiseL($errnbr,$a1=null,$a2=null,$a3=null,$a4=null,$a5=null) {
 107      $t = new ErrMsgText();
 108      $msg = $t->Get($errnbr,$a1,$a2,$a3,$a4,$a5);
 109      self::$__jpg_err->Raise($msg);
 110      }
 111  }
 112  
 113  //
 114  // First of all set up a default error handler
 115  //
 116  
 117  //=============================================================
 118  // The default trivial text error handler.
 119  //=============================================================
 120  class JpGraphErrObject {
 121  
 122      protected $iTitle = "JpGraph Error";
 123      protected $iDest = false;
 124  
 125  
 126      function JpGraphErrObject() {
 127      // Empty. Reserved for future use
 128      }
 129  
 130      function SetTitle($aTitle) {
 131      $this->iTitle = $aTitle;
 132      }
 133  
 134      function SetStrokeDest($aDest) { 
 135      $this->iDest = $aDest; 
 136      }
 137  
 138      // If aHalt is true then execution can't continue. Typical used for fatal errors
 139      function Raise($aMsg,$aHalt=true) {
 140      $aMsg = $this->iTitle.' '.$aMsg;
 141      if ($this->iDest) {
 142          $f = @fopen($this->iDest,'a');
 143          if( $f ) {
 144          @fwrite($f,$aMsg);
 145          @fclose($f);
 146          }
 147      }
 148      else {
 149          echo $aMsg;
 150      }
 151      if( $aHalt )
 152          die();
 153      }
 154  }
 155  
 156  //==============================================================
 157  // An image based error handler
 158  //==============================================================
 159  class JpGraphErrObjectImg extends JpGraphErrObject {
 160  
 161      function Raise($aMsg,$aHalt=true) {
 162      $img_iconerror = 
 163          'iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAMAAAC7IEhfAAAAaV'.
 164          'BMVEX//////2Xy8mLl5V/Z2VvMzFi/v1WyslKlpU+ZmUyMjEh/'.
 165          'f0VyckJlZT9YWDxMTDjAwMDy8sLl5bnY2K/MzKW/v5yyspKlpY'.
 166          'iYmH+MjHY/PzV/f2xycmJlZVlZWU9MTEXY2Ms/PzwyMjLFTjea'.
 167          'AAAAAXRSTlMAQObYZgAAAAFiS0dEAIgFHUgAAAAJcEhZcwAACx'.
 168          'IAAAsSAdLdfvwAAAAHdElNRQfTBgISOCqusfs5AAABLUlEQVR4'.
 169          '2tWV3XKCMBBGWfkranCIVClKLd/7P2Q3QsgCxjDTq+6FE2cPH+'.
 170          'xJ0Ogn2lQbsT+Wrs+buAZAV4W5T6Bs0YXBBwpKgEuIu+JERAX6'.
 171          'wM2rHjmDdEITmsQEEmWADgZm6rAjhXsoMGY9B/NZBwJzBvn+e3'.
 172          'wHntCAJdGu9SviwIwoZVDxPB9+Rc0TSEbQr0j3SA1gwdSn6Db0'.
 173          '6Tm1KfV6yzWGQO7zdpvyKLKBDmRFjzeB3LYgK7r6A/noDAfjtS'.
 174          'IXaIzbJSv6WgUebTMV4EoRB8a2mQiQjgtF91HdKDKZ1gtFtQjk'.
 175          'YcWaR5OKOhkYt+ZsTFdJRfPAApOpQYJTNHvCRSJR6SJngQadfc'.
 176          'vd69OLMddVOPCGVnmrFD8bVYd3JXfxXPtLR/+mtv59/ALWiiMx'.
 177          'qL72fwAAAABJRU5ErkJggg==' ;
 178  
 179      if( function_exists("imagetypes") )
 180          $supported = imagetypes();
 181      else
 182          $supported = 0;
 183  
 184      if( !function_exists('imagecreatefromstring') )
 185          $supported = 0;
 186  
 187      if( ob_get_length() || headers_sent() || !($supported & IMG_PNG) ) {
 188          // Special case for headers already sent or that the installation doesn't support
 189          // the PNG format (which the error icon is encoded in). 
 190          // Dont return an image since it can't be displayed
 191          die($this->iTitle.' '.$aMsg);        
 192      }
 193  
 194      $aMsg = wordwrap($aMsg,55);
 195      $lines = substr_count($aMsg,"\n");
 196  
 197      // Create the error icon GD
 198      $erricon = Image::CreateFromString(base64_decode($img_iconerror));   
 199  
 200      // Create an image that contains the error text.
 201      $w=400;     
 202      $h=100 + 15*max(0,$lines-3);
 203  
 204      $img = new Image($w,$h);
 205  
 206  
 207      // Drop shadow
 208      $img->SetColor("gray");
 209      $img->FilledRectangle(5,5,$w-1,$h-1,10);
 210      $img->SetColor("gray:0.7");
 211      $img->FilledRectangle(5,5,$w-3,$h-3,10);
 212      
 213      // Window background
 214      $img->SetColor("lightblue");
 215      $img->FilledRectangle(1,1,$w-5,$h-5);
 216      $img->CopyCanvasH($img->img,$erricon,5,30,0,0,40,40);
 217  
 218      // Window border
 219      $img->SetColor("black");
 220      $img->Rectangle(1,1,$w-5,$h-5);
 221      $img->Rectangle(0,0,$w-4,$h-4);
 222      
 223      // Window top row
 224      $img->SetColor("darkred");
 225      for($y=3; $y < 18; $y += 2 ) 
 226          $img->Line(1,$y,$w-6,$y);
 227  
 228      // "White shadow"
 229      $img->SetColor("white");
 230  
 231      // Left window edge
 232      $img->Line(2,2,2,$h-5);
 233      $img->Line(2,2,$w-6,2);
 234  
 235      // "Gray button shadow"
 236      $img->SetColor("darkgray");
 237  
 238      // Gray window shadow
 239      $img->Line(2,$h-6,$w-5,$h-6);
 240      $img->Line(3,$h-7,$w-5,$h-7);
 241  
 242      // Window title
 243      $m = floor($w/2-5);
 244      $l = 100;
 245      $img->SetColor("lightgray:1.3");
 246      $img->FilledRectangle($m-$l,2,$m+$l,16);
 247  
 248      // Stroke text
 249      $img->SetColor("darkred");
 250      $img->SetFont(FF_FONT2,FS_BOLD);
 251      $img->StrokeText($m-50,15,$this->iTitle);
 252      $img->SetColor("black");
 253      $img->SetFont(FF_FONT1,FS_NORMAL);
 254      $txt = new Text($aMsg,52,25);
 255      $txt->Align("left","top");
 256      $txt->Stroke($img);
 257      if ($this->iDest) {
 258             $img->Stream($this->iDest);
 259      } else {
 260          $img->Headers();
 261          $img->Stream();
 262      }
 263      if( $aHalt )
 264          die();
 265      }
 266  }
 267  
 268  
 269  // Install the default error handler
 270  if( USE_IMAGE_ERROR_HANDLER ) {
 271      JpGraphError::Install("JpGraphErrObjectImg");
 272  }
 273  else {
 274      JpGraphError::Install("JpGraphErrObject");
 275  }
 276  
 277  
 278  ?>