class.ezpdf.php

完美的在线教育系统

  if ($options['showLines']){
    if (!$options['showHeadings']){
      $y0=$y1;
    }
    $this->ezPrvtTableDrawLines($pos,$options['gap'],$x0,$x1,$y0,$y1,$y2,$options['lineCol'],$options['innerLineThickness'],$options['outerLineThickness'],$options['showLines']);
  }

  // close the object for drawing the text on top
  if ($options['shaded']){
    $this->closeObject();
    $this->restoreState();
  }
  
  $this->y=$y;
  return $y;
}

// ------------------------------------------------------------------------------
function ezProcessText($text){
  // this function will intially be used to implement underlining support, but could be used for a range of other
  // purposes
  $search = array('<u>','<U>','</u>','</U>');
  $replace = array('<c:uline>','<c:uline>','</c:uline>','</c:uline>');
  return str_replace($search,$replace,$text);
}

// ------------------------------------------------------------------------------

function ezText($text,$size=0,$options=array(),$test=0){
  // this will add a string of text to the document, starting at the current drawing
  // position.
  // it will wrap to keep within the margins, including optional offsets from the left
  // and the right, if $size is not specified, then it will be the last one used, or
  // the default value (12 I think).
  // the text will go to the start of the next line when a return code "\n" is found.
  // possible options are:
  // 'left'=> number, gap to leave from the left margin
  // 'right'=> number, gap to leave from the right margin
  // 'aleft'=> number, absolute left position (overrides 'left')
  // 'aright'=> number, absolute right position (overrides 'right')
  // 'justification' => 'left','right','center','centre','full'

  // only set one of the next two items (leading overrides spacing)
  // 'leading' => number, defines the total height taken by the line, independent of the font height.
  // 'spacing' => a real number, though usually set to one of 1, 1.5, 2 (line spacing as used in word processing)
  
  // if $test is set then this should just check if the text is going to flow onto a new page or not, returning true or false
  
  // apply the filtering which will make the underlining function.
  $text = $this->ezProcessText($text);
  
  $newPage=false;
  $store_y = $this->y;
  
  if (is_array($options) && isset($options['aleft'])){
    $left=$options['aleft'];
  } else {
    $left = $this->ez['leftMargin'] + ((is_array($options) && isset($options['left']))?$options['left']:0);
  }
  if (is_array($options) && isset($options['aright'])){
    $right=$options['aright'];
  } else {
    $right = $this->ez['pageWidth'] - $this->ez['rightMargin'] - ((is_array($options) && isset($options['right']))?$options['right']:0);
  }
  if ($size<=0){
    $size = $this->ez['fontSize'];
  } else {
    $this->ez['fontSize']=$size;
  }
  
  if (is_array($options) && isset($options['justification'])){
    $just = $options['justification'];
  } else {
    $just = 'left';
  }
  
  // modifications to give leading and spacing based on those given by Craig Heydenburg 1/1/02
  if (is_array($options) && isset($options['leading'])) { ## use leading instead of spacing
    $height = $options['leading'];
	} else if (is_array($options) && isset($options['spacing'])) {
    $height = $this->getFontHeight($size) * $options['spacing'];
	} else {
		$height = $this->getFontHeight($size);
	}

  
  $lines = explode("\n",$text);
  foreach ($lines as $line)
  {
  	// for each line of text to print
    $start=1;
    while (strlen($line) || $start)
    {
      //while there is still some text to print or if this is the first line
      $start=0;
      $this->y=$this->y-$height; //make Y position depend on font-size
      if ($this->y < $this->ez['bottomMargin'])
      {
      	//if this vertical position (Y) is not out of the page 
        if ($test)
        {
          //we are on a new page, nothing to do
          $newPage=true;
        }
        else 
        {
          //else start new page
          $this->ezNewPage();
          // and then re-calc the left and right, in case they have changed due to columns
        }
      }
      if (is_array($options) && isset($options['aleft'])){
      	//there are options and they include left position
        $left=$options['aleft'];
      } else {
      	//there are no options, or they don't include left position
        $left = $this->ez['leftMargin'] + ((is_array($options) && isset($options['left']))?$options['left']:0);
      }
      if (is_array($options) && isset($options['aright'])){
        $right=$options['aright'];
      } else {
        $right = $this->ez['pageWidth'] - $this->ez['rightMargin'] - ((is_array($options) && isset($options['right']))?$options['right']:0);
      }
      $line=$this->addTextWrap($left,$this->y,$right-$left,$size,$line,$just,0,$test);
    }
  }

  if ($test){
    $this->y=$store_y;
    return $newPage;
  } else {
    return $this->y;
  }
}

// ------------------------------------------------------------------------------

function ezImage($image,$pad = 5,$width = 0,$resize = 'full',$just = 'center',$border = ''){
	//beta ezimage function
	if (stristr($image,'://'))//copy to temp file
	{
		$fp = @fopen($image,"rb");
		while(!feof($fp))
   		{
      			$cont.= fread($fp,1024);
   		}
   		fclose($fp);
		$image = tempnam ("/tmp", "php-pdf");
		$fp2 = @fopen($image,"w");
   		fwrite($fp2,$cont);
  		fclose($fp2);
		$temp = true;
	}

	if (!(file_exists($image))) return false; //return immediately if image file does not exist
	$imageInfo = getimagesize($image);
	switch ($imageInfo[2]){
		case 2:
			$type = "jpeg";
			break;
		case 3:
			$type = "png";
			break;
		default:
			return false; //return if file is not jpg or png
	}
	if ($width == 0) $width = $imageInfo[0]; //set width
	$ratio = $imageInfo[0]/$imageInfo[1];

	//get maximum width of image
	if (isset($this->ez['columns']) && $this->ez['columns']['on'] == 1)
	{
		$bigwidth = $this->ez['columns']['width'] - ($pad * 2);
	}
	else
	{
		$bigwidth = $this->ez['pageWidth'] - ($pad * 2);
	}
	//fix width if larger than maximum or if $resize=full
	if ($resize == 'full' || $resize == 'width' || $width > $bigwidth)
	{
		$width = $bigwidth;

	}

	$height = ($width/$ratio); //set height

	//fix size if runs off page
	if ($height > ($this->y - $this->ez['bottomMargin'] - ($pad * 2)))
	{
		if ($resize != 'full')
		{
			$this->ezNewPage();
		}
		else
		{
			$height = ($this->y - $this->ez['bottomMargin'] - ($pad * 2)); //shrink height
			$width = ($height*$ratio); //fix width
		}
	}

	//fix x-offset if image smaller than bigwidth
	if ($width < $bigwidth)
	{
		//center if justification=center
		if ($just == 'center')
		{
			$offset = ($bigwidth - $width) / 2;
		}
		//move to right if justification=right
		if ($just == 'right')
		{
			$offset = ($bigwidth - $width);
		}
		//leave at left if justification=left
		if ($just == 'left')
		{
			$offset = 0;
		}
	}


	//call appropriate function
	if ($type == "jpeg"){
		$this->addJpegFromFile($image,$this->ez['leftMargin'] + $pad + $offset, $this->y + $this->getFontHeight($this->ez['fontSize']) - $pad - $height,$width);
	}

	if ($type == "png"){
		$this->addPngFromFile($image,$this->ez['leftMargin'] + $pad + $offset, $this->y + $this->getFontHeight($this->ez['fontSize']) - $pad - $height,$width);
	}
	//draw border
	if ($border != '')
	{
	if (!(isset($border['color'])))
	{
		$border['color']['red'] = .5;
		$border['color']['blue'] = .5;
		$border['color']['green'] = .5;
	}
	if (!(isset($border['width']))) $border['width'] = 1;
	if (!(isset($border['cap']))) $border['cap'] = 'round';
	if (!(isset($border['join']))) $border['join'] = 'round';
	

	$this->setStrokeColor($border['color']['red'],$border['color']['green'],$border['color']['blue']);
	$this->setLineStyle($border['width'],$border['cap'],$border['join']);
	$this->rectangle($this->ez['leftMargin'] + $pad + $offset, $this->y + $this->getFontHeight($this->ez['fontSize']) - $pad - $height,$width,$height);

	}
	// move y below image
	$this->y = $this->y - $pad - $height;
	//remove tempfile for remote images
	if ($temp == true) unlink($image);

}
// ------------------------------------------------------------------------------

// note that templating code is still considered developmental - have not really figured
// out a good way of doing this yet.
function loadTemplate($templateFile){
  // this function will load the requested template ($file includes full or relative pathname)
  // the code for the template will be modified to make it name safe, and then stored in 
  // an array for later use
  // The id of the template will be returned for the user to operate on it later
  if (!file_exists($templateFile)){
    return -1;
  }

  $code = implode('',file($templateFile));
  if (!strlen($code)){
    return;
  }

  $code = trim($code);
  if (substr($code,0,5)=='<?php'){
    $code = substr($code,5);
  }
  if (substr($code,-2)=='?>'){
    $code = substr($code,0,strlen($code)-2);
  }
  if (isset($this->ez['numTemplates'])){
    $newNum = $this->ez['numTemplates'];
    $this->ez['numTemplates']++;
  } else {
    $newNum=0;
    $this->ez['numTemplates']=1;
    $this->ez['templates']=array();
  }

  $this->ez['templates'][$newNum]['code']=$code;

  return $newNum;
}

// ------------------------------------------------------------------------------

function execTemplate($id,$data=array(),$options=array()){
  // execute the given template on the current document.
  if (!isset($this->ez['templates'][$id])){
    return;
  }
  eval($this->ez['templates'][$id]['code']);
}

// ------------------------------------------------------------------------------
function ilink($info){
  $this->alink($info,1);
}

function alink($info,$internal=0){
  // a callback function to support the formation of clickable links within the document
  $lineFactor=0.05; // the thickness of the line as a proportion of the height. also the drop of the line.
  switch($info['status']){
    case 'start':
    case 'sol':
      // the beginning of the link
      // this should contain the URl for the link as the 'p' entry, and will also contain the value of 'nCallback'
      if (!isset($this->ez['links'])){
        $this->ez['links']=array();
      }
      $i = $info['nCallback'];
      $this->ez['links'][$i] = array('x'=>$info['x'],'y'=>$info['y'],'angle'=>$info['angle'],'decender'=>$info['decender'],'height'=>$info['height'],'url'=>$info['p']);
      if ($internal==0){
        $this->saveState();
        $this->setColor(0,0,1);
        $this->setStrokeColor(0,0,1);
        $thick = $info['height']*$lineFactor;
        $this->setLineStyle($thick);
      }
      break;
    case 'end':
    case 'eol':
      // the end of the link
      // assume that it is the most recent opening which has closed
      $i = $info['nCallback'];
      $start = $this->ez['links'][$i];
      // add underlining
      if ($internal){
        $this->addInternalLink($start['url'],$start['x'],$start['y']+$start['decender'],$info['x'],$start['y']+$start['decender']+$start['height']);
      } else {
        $a = deg2rad((float)$start['angle']-90.0);
        $drop = $start['height']*$lineFactor*1.5;
        $dropx = cos($a)*$drop;
        $dropy = -sin($a)*$drop;
        $this->line($start['x']-$dropx,$start['y']-$dropy,$info['x']-$dropx,$info['y']-$dropy);
        $this->addLink($start['url'],$start['x'],$start['y']+$start['decender'],$info['x'],$start['y']+$start['decender']+$start['height']);
        $this->restoreState();
      }
      break;
  }
}

// ------------------------------------------------------------------------------

function uline($info){
  // a callback function to support underlining
  $lineFactor=0.05; // the thickness of the line as a proportion of the height. also the drop of the line.
  switch($info['status']){
    case 'start':
    case 'sol':
    
      // the beginning of the underline zone
      if (!isset($this->ez['links'])){
        $this->ez['links']=array();
      }
      $i = $info['nCallback'];
      $this->ez['links'][$i] = array('x'=>$info['x'],'y'=>$info['y'],'angle'=>$info['angle'],'decender'=>$info['decender'],'height'=>$info['height']);
      $this->saveState();
      $thick = $info['height']*$lineFactor;
      $this->setLineStyle($thick);
      break;
    case 'end':
    case 'eol':
      // the end of the link
      // assume that it is the most recent opening which has closed
      $i = $info['nCallback'];
      $start = $this->ez['links'][$i];
      // add underlining
      $a = deg2rad((float)$start['angle']-90.0);
      $drop = $start['height']*$lineFactor*1.5;
      $dropx = cos($a)*$drop;
      $dropy = -sin($a)*$drop;
      $this->line($start['x']-$dropx,$start['y']-$dropy,$info['x']-$dropx,$info['y']-$dropy);
      $this->restoreState();
      break;
  }
}

// ------------------------------------------------------------------------------

}
?>