class.pdf.php

国外很不错的一个开源OA系统Group-Office

          $res.= $this->filterText($v);
        }

        $res.= ")\n";
      }

      $res.= ">>\nendobj";

      return  $res;

      break;
    }
  }


  /**
   * an action object, used to link to URLS initially
   */
  function  o_action($id, $action, $options = '') {

    if  ($action != 'new') {

      $o = & $this->objects[$id];
    }

    switch  ($action) {

    case  'new':

      if  (is_array($options)) {

        $this->objects[$id] = array('t'=>'action', 'info'=>$options, 'type'=>$options['type']);
      } else {

        // then assume a URI action
        $this->objects[$id] = array('t'=>'action', 'info'=>$options, 'type'=>'URI');
      }

      break;

    case  'out':

      if  ($this->encrypted) {

        $this->encryptInit($id);
      }

      $res = "\n".$id." 0 obj\n<< /Type /Action";

      switch ($o['type']) {

      case  'ilink':

        // there will be an 'label' setting, this is the name of the destination
        $res.= "\n/S /GoTo\n/D ".$this->destinations[(string)$o['info']['label']]." 0 R";

        break;

      case  'URI':

        $res.= "\n/S /URI\n/URI (";

        if  ($this->encrypted) {

          $res.= $this->filterText($this->ARC4($o['info']));
        } else {

          $res.= $this->filterText($o['info']);
        }

        $res.= ")";

        break;
      }

      $res.= "\n>>\nendobj";

      return  $res;

      break;
    }
  }


  /**
   * an annotation object, this will add an annotation to the current page.
   * initially will support just link annotations
   */
  function  o_annotation($id, $action, $options = '') {

    if  ($action != 'new') {

      $o = & $this->objects[$id];
    }

    switch  ($action) {

    case  'new':

      // add the annotation to the current page
      $pageId =  $this->currentPage;

      $this->o_page($pageId, 'annot', $id);

      // and add the action object which is going to be required
      switch ($options['type']) {

      case  'link':

        $this->objects[$id] = array('t'=>'annotation', 'info'=>$options);

        $this->numObj++;

        $this->o_action($this->numObj, 'new', $options['url']);

        $this->objects[$id]['info']['actionId'] = $this->numObj;

        break;

      case  'ilink':

        // this is to a named internal link
        $label =  $options['label'];

        $this->objects[$id] = array('t'=>'annotation', 'info'=>$options);

        $this->numObj++;

        $this->o_action($this->numObj, 'new', array('type'=>'ilink', 'label'=>$label));

        $this->objects[$id]['info']['actionId'] = $this->numObj;

        break;
      }

      break;

    case  'out':

      $res = "\n".$id." 0 obj\n<< /Type /Annot";

      switch ($o['info']['type']) {

      case  'link':

      case  'ilink':

        $res.=  "\n/Subtype /Link";

        break;
      }

      $res.= "\n/A ".$o['info']['actionId']." 0 R";

      $res.= "\n/Border [0 0 0]";

      $res.= "\n/H /I";

      $res.= "\n/Rect [ ";

      foreach($o['info']['rect'] as  $v) {

        $res.=  sprintf("%.4f ", $v);
      }

      $res.= "]";

      $res.= "\n>>\nendobj";

      return  $res;

      break;
    }
  }


  /**
   * a page object, it also creates a contents object to hold its contents
   */
  function  o_page($id, $action, $options = '') {

    if  ($action != 'new') {

      $o = & $this->objects[$id];
    }

    switch  ($action) {

    case  'new':

      $this->numPages++;

      $this->objects[$id] = array('t'=>'page', 'info'=>array('parent'=>$this->currentNode, 'pageNum'=>$this->numPages));

      if  (is_array($options)) {

        // then this must be a page insertion, array shoudl contain 'rid','pos'=[before|after]
        $options['id'] = $id;

        $this->o_pages($this->currentNode, 'page', $options);
      } else {

        $this->o_pages($this->currentNode, 'page', $id);
      }

      $this->currentPage = $id;

      //make a contents object to go with this page
      $this->numObj++;

      $this->o_contents($this->numObj, 'new', $id);

      $this->currentContents = $this->numObj;

      $this->objects[$id]['info']['contents'] = array();

      $this->objects[$id]['info']['contents'][] = $this->numObj;

      $match =  ($this->numPages%2 ?  'odd' :  'even');

      foreach($this->addLooseObjects as  $oId=>$target) {

        if  ($target == 'all' ||  $match == $target) {

          $this->objects[$id]['info']['contents'][] = $oId;
        }
      }

      break;

    case  'content':

      $o['info']['contents'][] = $options;

      break;

    case  'annot':

      // add an annotation to this page
      if  (!isset($o['info']['annot'])) {

        $o['info']['annot'] = array();
      }

      // $options should contain the id of the annotation dictionary
      $o['info']['annot'][] = $options;

      break;

    case  'out':

      $res = "\n".$id." 0 obj\n<< /Type /Page";

      $res.= "\n/Parent ".$o['info']['parent']." 0 R";

      if  (isset($o['info']['annot'])) {

        $res.= "\n/Annots [";

        foreach($o['info']['annot'] as  $aId) {

          $res.= " ".$aId." 0 R";
        }

        $res.= " ]";
      }

      $count =  count($o['info']['contents']);

      if  ($count == 1) {

        $res.= "\n/Contents ".$o['info']['contents'][0]." 0 R";
      } else  if  ($count>1) {

        $res.= "\n/Contents [\n";

        // reverse the page contents so added objects are below normal content
        //foreach (array_reverse($o['info']['contents']) as  $cId) {

        // Back to normal now that I've got transparency working --Benj
        foreach ($o['info']['contents'] as  $cId) {
          $res.= $cId." 0 R\n";
        }

        $res.= "]";
      }

      $res.= "\n>>\nendobj";

      return  $res;

      break;
    }
  }


  /**
   * the contents objects hold all of the content which appears on pages
   */
  function  o_contents($id, $action, $options = '') {

    if  ($action != 'new') {

      $o = & $this->objects[$id];
    }

    switch  ($action) {

    case  'new':

      $this->objects[$id] = array('t'=>'contents', 'c'=>'', 'info'=>array());

      if  (strlen($options) &&  intval($options)) {

        // then this contents is the primary for a page
        $this->objects[$id]['onPage'] = $options;
      } else  if  ($options == 'raw') {

        // then this page contains some other type of system object
        $this->objects[$id]['raw'] = 1;
      }

      break;

    case  'add':

      // add more options to the decleration
      foreach ($options as  $k=>$v) {

        $o['info'][$k] = $v;
      }

    case  'out':

      $tmp = $o['c'];

      $res =  "\n".$id." 0 obj\n";

      if  (isset($this->objects[$id]['raw'])) {

        $res.= $tmp;
      } else {

        $res.=  "<<";

        if  (function_exists('gzcompress') &&  $this->options['compression']) {

          // then implement ZLIB based compression on this content stream
          $res.= " /Filter /FlateDecode";

          $tmp =  gzcompress($tmp,  6);
        }

        if  ($this->encrypted) {

          $this->encryptInit($id);

          $tmp =  $this->ARC4($tmp);
        }

        foreach($o['info'] as  $k=>$v) {

          $res.=  "\n/".$k.' '.$v;
        }

        $res.= "\n/Length ".strlen($tmp) ." >>\nstream\n".$tmp."\nendstream";
      }

      $res.= "\nendobj\n";

      return  $res;

      break;
    }
  }


  /**
   * an image object, will be an XObject in the document, includes description and data
   */
  function  o_image($id, $action, $options = '') {

    if  ($action != 'new') {

      $o = & $this->objects[$id];
    }

    switch ($action) {

    case  'new':

      // make the new object
      $this->objects[$id] = array('t'=>'image', 'data'=>&$options['data'], 'info'=>array());

      $this->objects[$id]['info']['Type'] = '/XObject';

      $this->objects[$id]['info']['Subtype'] = '/Image';

      $this->objects[$id]['info']['Width'] = $options['iw'];

      $this->objects[$id]['info']['Height'] = $options['ih'];

      if  (!isset($options['type']) ||  $options['type'] == 'jpg') {

        if  (!isset($options['channels'])) {

          $options['channels'] = 3;
        }

        switch ($options['channels']) {

        case  1:

          $this->objects[$id]['info']['ColorSpace'] = '/DeviceGray';

          break;

        default:

          $this->objects[$id]['info']['ColorSpace'] = '/DeviceRGB';

          break;
        }

        $this->objects[$id]['info']['Filter'] = '/DCTDecode';

        $this->objects[$id]['info']['BitsPerComponent'] = 8;
      } else  if  ($options['type'] == 'png') {
        
        $this->objects[$id]['info']['Filter'] = '/FlateDecode';

        $this->objects[$id]['info']['DecodeParms'] = '<< /Predictor 15 /Colors '.$options['ncolor'].' /Columns '.$options['iw'].' /BitsPerComponent '.$options['bitsPerComponent'].'>>';
        if  (strlen($options['pdata'])) {

          $tmp =  ' [ /Indexed /DeviceRGB '.(strlen($options['pdata']) /3-1) .' ';

          $this->numObj++;

          $this->o_contents($this->numObj, 'new');

          $this->objects[$this->numObj]['c'] = $options['pdata'];

          $tmp.= $this->numObj.' 0 R';

          $tmp.= ' ]';

          $this->objects[$id]['info']['ColorSpace'] =  $tmp;

          if  (isset($options['transparency'])) {

            switch ($options['transparency']['type']) {

            case  'indexed':

              $tmp = ' [ '.$options['transparency']['data'].' '.$options['transparency']['data'].'] ';

              $this->objects[$id]['info']['Mask'] =  $tmp;

              break;

            case 'color-key':
              $tmp = ' [ '.
                $options['transparency']['r'] . ' ' . $options['transparency']['r'] .
                $options['transparency']['g'] . ' ' . $options['transparency']['g'] .
                $options['transparency']['b'] . ' ' . $options['transparency']['b'] .
                ' ] ';
              $this->objects[$id]['info']['Mask'] = $tmp;
              pre_r($tmp);
              break;
                
            }
          }
        } else {

          if  (isset($options['transparency'])) {

            switch ($options['transparency']['type']) {

            case  'indexed':

              $tmp = ' [ '.$options['transparency']['data'].' '.$options['transparency']['data'].'] ';

              $this->objects[$id]['info']['Mask'] =  $tmp;

              break;

            case 'color-key':
              $tmp = ' [ '.
                $options['transparency']['r'] . ' ' . $options['transparency']['r'] . ' ' .
                $options['transparency']['g'] . ' ' . $options['transparency']['g'] . ' ' .
                $options['transparency']['b'] . ' ' . $options['transparency']['b'] .
                ' ] ';
              $this->objects[$id]['info']['Mask'] = $tmp;
              break;
                
            }
          }
          $this->objects[$id]['info']['ColorSpace'] = '/'.$options['color'];
        }

        $this->objects[$id]['info']['BitsPerComponent'] = $options['bitsPerComponent'];
      }

      // assign it a place in the named resource dictionary as an external object, according to
      // the label passed in with it.
      $this->o_pages($this->currentNode, 'xObject', array('label'=>$options['label'], 'objNum'=>$id));

      // also make sure that we have the right procset object for it.
      $this->o_procset($this->procsetObjectId, 'add', 'ImageC');

      break;

    case  'out':

      $tmp = &$o['data'];

      $res =  "\n".$id." 0 obj\n<<";

      foreach($o['info'] as  $k=>$v) {

        $res.= "\n/".$k.' '.$v;
      }

      if  ($this->encrypted) {

        $this->encryptInit($id);

        $tmp =  $this->ARC4($tmp);
      }

      $res.= "\n/Length ".strlen($tmp) ." >>\nstream\n".$tmp."\nendstream\nendobj\n";

      return  $res;

      break;
    }
  }


  /**
   * graphics state object
   */
  function  o_extGState($id,  $action,  $options = "") {

    static  $valid_params =  array("LW",  "LC",  "LC",  "LJ",  "ML",
                                   "D",  "RI",  "OP",  "op",  "OPM",
                                   "Font",  "BG",  "BG2",  "UCR",
                                   "TR",  "TR2",  "HT",  "FL",
                                   "SM",  "SA",  "BM",  "SMask",
                                   "CA",  "ca",  "AIS",  "TK");

    if  ( $action !=  "new") {
      $o = & $this->objects[$id];
    }

    switch  ($action) {

    case  "new":
      $this->objects[$id] =  array('t' => 'extGState',  'info' => $options);

      // Tell the pages about the new resource
      $this->numStates++;
      $this->o_pages($this->currentNode,  'extGState',  array("objNum" => $id,  "stateNum" => $this->numStates));
      break;


    case  "out":
      $res =
        "\n" . $id . " 0 obj\n".
        "<< /Type /ExtGState\n";

      foreach ($o["info"] as  $parameter => $value) {
        if  ( !in_array($parameter,  $valid_params))
          continue;
        $res.=  "/$parameter $value\n";
      }

      $res.=
        ">>\n".