class.ezpdf.php

完美的在线教育系统

<?php

include_once('class.pdf.php');

class Cezpdf extends Cpdf {
//==============================================================================
// this class will take the basic interaction facilities of the Cpdf class
// and make more useful functions so that the user does not have to 
// know all the ins and outs of pdf presentation to produce something pretty.
//
// IMPORTANT NOTE
// there is no warranty, implied or otherwise with this software.
// 
// version 009 (versioning is linked to class.pdf.php)
//
// released under a public domain licence.
//
// Wayne Munro, R&OS Ltd, http://www.ros.co.nz/pdf
//==============================================================================

var $ez=array('fontSize'=>10); // used for storing most of the page configuration parameters
var $y; // this is the current vertical positon on the page of the writing point, very important
var $ezPages=array(); // keep an array of the ids of the pages, making it easy to go back and add page numbers etc.
var $ezPageCount=0;

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

function Cezpdf($paper='a4',$orientation='portrait'){
	// Assuming that people don't want to specify the paper size using the absolute coordinates
	// allow a couple of options:
	// orientation can be 'portrait' or 'landscape'
	// or, to actually set the coordinates, then pass an array in as the first parameter.
	// the defaults are as shown.
	// 
	// -------------------------
	// 2002-07-24 - Nicola Asuni ([e-mail]):
	// Added new page formats (45 standard ISO paper formats and 4 american common formats)
	// paper cordinates are calculated in this way: (inches * 72) where 1 inch = 2.54 cm
	// 
	// Now you may also pass a 2 values array containing the page width and height in centimeters
	// -------------------------

	if (!is_array($paper)){
		switch (strtoupper($paper)){
			case '4A0': {$size = array(0,0,4767.87,6740.79); break;}
			case '2A0': {$size = array(0,0,3370.39,4767.87); break;}
			case 'A0': {$size = array(0,0,2383.94,3370.39); break;}
			case 'A1': {$size = array(0,0,1683.78,2383.94); break;}
			case 'A2': {$size = array(0,0,1190.55,1683.78); break;}
			case 'A3': {$size = array(0,0,841.89,1190.55); break;}
			case 'A4': default: {$size = array(0,0,595.28,841.89); break;}
			case 'A5': {$size = array(0,0,419.53,595.28); break;}
			case 'A6': {$size = array(0,0,297.64,419.53); break;}
			case 'A7': {$size = array(0,0,209.76,297.64); break;}
			case 'A8': {$size = array(0,0,147.40,209.76); break;}
			case 'A9': {$size = array(0,0,104.88,147.40); break;}
			case 'A10': {$size = array(0,0,73.70,104.88); break;}
			case 'B0': {$size = array(0,0,2834.65,4008.19); break;}
			case 'B1': {$size = array(0,0,2004.09,2834.65); break;}
			case 'B2': {$size = array(0,0,1417.32,2004.09); break;}
			case 'B3': {$size = array(0,0,1000.63,1417.32); break;}
			case 'B4': {$size = array(0,0,708.66,1000.63); break;}
			case 'B5': {$size = array(0,0,498.90,708.66); break;}
			case 'B6': {$size = array(0,0,354.33,498.90); break;}
			case 'B7': {$size = array(0,0,249.45,354.33); break;}
			case 'B8': {$size = array(0,0,175.75,249.45); break;}
			case 'B9': {$size = array(0,0,124.72,175.75); break;}
			case 'B10': {$size = array(0,0,87.87,124.72); break;}
			case 'C0': {$size = array(0,0,2599.37,3676.54); break;}
			case 'C1': {$size = array(0,0,1836.85,2599.37); break;}
			case 'C2': {$size = array(0,0,1298.27,1836.85); break;}
			case 'C3': {$size = array(0,0,918.43,1298.27); break;}
			case 'C4': {$size = array(0,0,649.13,918.43); break;}
			case 'C5': {$size = array(0,0,459.21,649.13); break;}
			case 'C6': {$size = array(0,0,323.15,459.21); break;}
			case 'C7': {$size = array(0,0,229.61,323.15); break;}
			case 'C8': {$size = array(0,0,161.57,229.61); break;}
			case 'C9': {$size = array(0,0,113.39,161.57); break;}
			case 'C10': {$size = array(0,0,79.37,113.39); break;}
			case 'RA0': {$size = array(0,0,2437.80,3458.27); break;}
			case 'RA1': {$size = array(0,0,1729.13,2437.80); break;}
			case 'RA2': {$size = array(0,0,1218.90,1729.13); break;}
			case 'RA3': {$size = array(0,0,864.57,1218.90); break;}
			case 'RA4': {$size = array(0,0,609.45,864.57); break;}
			case 'SRA0': {$size = array(0,0,2551.18,3628.35); break;}
			case 'SRA1': {$size = array(0,0,1814.17,2551.18); break;}
			case 'SRA2': {$size = array(0,0,1275.59,1814.17); break;}
			case 'SRA3': {$size = array(0,0,907.09,1275.59); break;}
			case 'SRA4': {$size = array(0,0,637.80,907.09); break;}
			case 'LETTER': {$size = array(0,0,612.00,792.00); break;}
			case 'LEGAL': {$size = array(0,0,612.00,1008.00); break;}
			case 'EXECUTIVE': {$size = array(0,0,521.86,756.00); break;}
			case 'FOLIO': {$size = array(0,0,612.00,936.00); break;}
		}
		switch (strtolower($orientation)){
			case 'landscape':
				$a=$size[3];
				$size[3]=$size[2];
				$size[2]=$a;
				break;
		}
	} else {
		if (count($paper)>2) {
			// then an array was sent it to set the size
			$size = $paper;
		}
		else { //size in centimeters has been passed
			$size[0] = 0;
			$size[1] = 0;
			$size[2] = ( $paper[0] / 2.54 ) * 72;
			$size[3] = ( $paper[1] / 2.54 ) * 72;
		}
	}
	$this->Cpdf($size);
	$this->ez['pageWidth']=$size[2];
	$this->ez['pageHeight']=$size[3];
	
	// also set the margins to some reasonable defaults
	$this->ez['topMargin']=30;
	$this->ez['bottomMargin']=30;
	$this->ez['leftMargin']=30;
	$this->ez['rightMargin']=30;
	
	// set the current writing position to the top of the first page
	$this->y = $this->ez['pageHeight']-$this->ez['topMargin'];
	// and get the ID of the page that was created during the instancing process.
	$this->ezPages[1]=$this->getFirstPageId();
	$this->ezPageCount=1;
}

// ------------------------------------------------------------------------------
// 2002-07-24: Nicola Asuni ([e-mail])
// Set Margins in centimeters
function ezSetCmMargins($top,$bottom,$left,$right){
	$top = ( $top / 2.54 ) * 72;
	$bottom = ( $bottom / 2.54 ) * 72;
	$left = ( $left / 2.54 ) * 72;
	$right = ( $right / 2.54 ) * 72;
	$this->ezSetMargins($top,$bottom,$left,$right);
}
// ------------------------------------------------------------------------------


function ezColumnsStart($options=array()){
  // start from the current y-position, make the set number of columne
  if (isset($this->ez['columns']) && $this->ez['columns']==1){
    // if we are already in a column mode then just return.
    return;
  }
  $def=array('gap'=>10,'num'=>2);
  foreach($def as $k=>$v){
    if (!isset($options[$k])){
      $options[$k]=$v;
    }
  }
  // setup the columns
  $this->ez['columns']=array('on'=>1,'colNum'=>1);

  // store the current margins
  $this->ez['columns']['margins']=array(
     $this->ez['leftMargin']
    ,$this->ez['rightMargin']
    ,$this->ez['topMargin']
    ,$this->ez['bottomMargin']
  );
  // and store the settings for the columns
  $this->ez['columns']['options']=$options;
  // then reset the margins to suit the new columns
  // safe enough to assume the first column here, but start from the current y-position
  $this->ez['topMargin']=$this->ez['pageHeight']-$this->y;
  $width=($this->ez['pageWidth']-$this->ez['leftMargin']-$this->ez['rightMargin']-($options['num']-1)*$options['gap'])/$options['num'];
  $this->ez['columns']['width']=$width;
  $this->ez['rightMargin']=$this->ez['pageWidth']-$this->ez['leftMargin']-$width;
  
}
// ------------------------------------------------------------------------------
function ezColumnsStop(){
  if (isset($this->ez['columns']) && $this->ez['columns']['on']==1){
    $this->ez['columns']['on']=0;
    $this->ez['leftMargin']=$this->ez['columns']['margins'][0];
    $this->ez['rightMargin']=$this->ez['columns']['margins'][1];
    $this->ez['topMargin']=$this->ez['columns']['margins'][2];
    $this->ez['bottomMargin']=$this->ez['columns']['margins'][3];
  }
}
// ------------------------------------------------------------------------------
function ezInsertMode($status=1,$pageNum=1,$pos='before'){
  // puts the document into insert mode. new pages are inserted until this is re-called with status=0
  // by default pages wil be inserted at the start of the document
  switch($status){
    case '1':
      if (isset($this->ezPages[$pageNum])){
        $this->ez['insertMode']=1;
        $this->ez['insertOptions']=array('id'=>$this->ezPages[$pageNum],'pos'=>$pos);
      }
      break;
    case '0':
      $this->ez['insertMode']=0;
      break;
  }
}
// ------------------------------------------------------------------------------

function ezNewPage(){
  $pageRequired=1;
  if (isset($this->ez['columns']) && $this->ez['columns']['on']==1){
    // check if this is just going to a new column
    // increment the column number
//echo 'HERE<br>';
    $this->ez['columns']['colNum']++;
//echo $this->ez['columns']['colNum'].'<br>';
    if ($this->ez['columns']['colNum'] <= $this->ez['columns']['options']['num']){
      // then just reset to the top of the next column
      $pageRequired=0;
    } else {
      $this->ez['columns']['colNum']=1;
      $this->ez['topMargin']=$this->ez['columns']['margins'][2];
    }

    $width = $this->ez['columns']['width'];
    $this->ez['leftMargin']=$this->ez['columns']['margins'][0]+($this->ez['columns']['colNum']-1)*($this->ez['columns']['options']['gap']+$width);
    $this->ez['rightMargin']=$this->ez['pageWidth']-$this->ez['leftMargin']-$width;
  }
//echo 'left='.$this->ez['leftMargin'].'   right='.$this->ez['rightMargin'].'<br>';

  if ($pageRequired){
    // make a new page, setting the writing point back to the top
    $this->y = $this->ez['pageHeight']-$this->ez['topMargin'];
    // make the new page with a call to the basic class.
    $this->ezPageCount++;
    if (isset($this->ez['insertMode']) && $this->ez['insertMode']==1){
      $id = $this->ezPages[$this->ezPageCount] = $this->newPage(1,$this->ez['insertOptions']['id'],$this->ez['insertOptions']['pos']);
      // then manipulate the insert options so that inserted pages follow each other
      $this->ez['insertOptions']['id']=$id;
      $this->ez['insertOptions']['pos']='after';
    } else {
      $this->ezPages[$this->ezPageCount] = $this->newPage();
    }
  } else {
    $this->y = $this->ez['pageHeight']-$this->ez['topMargin'];
  }
}

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

function ezSetMargins($top,$bottom,$left,$right){
  // sets the margins to new values
  $this->ez['topMargin']=$top;
  $this->ez['bottomMargin']=$bottom;
  $this->ez['leftMargin']=$left;
  $this->ez['rightMargin']=$right;
  // check to see if this means that the current writing position is outside the 
  // writable area
  if ($this->y > $this->ez['pageHeight']-$top){
    // then move y down
    $this->y = $this->ez['pageHeight']-$top;
  }
  if ( $this->y < $bottom){
    // then make a new page
    $this->ezNewPage();
  }
}  

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

function ezGetCurrentPageNumber(){
  // return the strict numbering (1,2,3,4..) number of the current page
  return $this->ezPageCount;
}

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

function ezStartPageNumbers($x,$y,$size,$pos='left',$pattern='{PAGENUM} of {TOTALPAGENUM}',$num=''){
  // put page numbers on the pages from here.
  // place then on the 'pos' side of the coordinates (x,y).
  // pos can be 'left' or 'right'
  // use the given 'pattern' for display, where (PAGENUM} and {TOTALPAGENUM} are replaced
  // as required.
  // if $num is set, then make the first page this number, the number of total pages will
  // be adjusted to account for this.
  // Adjust this function so that each time you 'start' page numbers then you effectively start a different batch
  // return the number of the batch, so that they can be stopped in a different order if required.
  if (!$pos || !strlen($pos)){
    $pos='left';
  }
  if (!$pattern || !strlen($pattern)){
    $pattern='{PAGENUM} of {TOTALPAGENUM}';
  }
  if (!isset($this->ez['pageNumbering'])){
    $this->ez['pageNumbering']=array();
  }
  $i = count($this->ez['pageNumbering']);
  $this->ez['pageNumbering'][$i][$this->ezPageCount]=array('x'=>$x,'y'=>$y,'pos'=>$pos,'pattern'=>$pattern,'num'=>$num,'size'=>$size);
  return $i;
}

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

function ezWhatPageNumber($pageNum,$i=0){
  // given a particular generic page number (ie, document numbered sequentially from beginning),
  // return the page number under a particular page numbering scheme ($i)
  $num=0;
  $start=1;
  $startNum=1;
  if (!isset($this->ez['pageNumbering']))
  {
    $this->addMessage('WARNING: page numbering called for and wasn\'t started with ezStartPageNumbers');
    return 0;
  }
  foreach($this->ez['pageNumbering'][$i] as $k=>$v){
    if ($k<=$pageNum){
      if (is_array($v)){
        // start block
        if (strlen($v['num'])){
          // a start was specified
          $start=$v['num'];
          $startNum=$k;
          $num=$pageNum-$startNum+$start;
        }
      } else {
        // stop block
        $num=0;
      }
    }
  }
  return $num;
}

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

function ezStopPageNumbers($stopTotal=0,$next=0,$i=0){
  // if stopTotal=1 then the totalling of pages for this number will stop too
  // if $next=1, then do this page, but not the next, else do not do this page either
  // if $i is set, then stop that particular pagenumbering sequence.
  if (!isset($this->ez['pageNumbering'])){
    $this->ez['pageNumbering']=array();
  }
  if ($next && isset($this->ez['pageNumbering'][$i][$this->ezPageCount]) && is_array($this->ez['pageNumbering'][$i][$this->ezPageCount])){
    // then this has only just been started, this will over-write the start, and nothing will appear
    // add a special command to the start block, telling it to stop as well
    if ($stopTotal){
      $this->ez['pageNumbering'][$i][$this->ezPageCount]['stoptn']=1;
    } else {
      $this->ez['pageNumbering'][$i][$this->ezPageCount]['stopn']=1;
    }
  } else {
    if ($stopTotal){
      $this->ez['pageNumbering'][$i][$this->ezPageCount]='stopt';
    } else {
      $this->ez['pageNumbering'][$i][$this->ezPageCount]='stop';
    }
    if ($next){
      $this->ez['pageNumbering'][$i][$this->ezPageCount].='n';
    }
  }
}

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

function ezPRVTpageNumberSearch($lbl,&$tmp){
  foreach($tmp as $i=>$v){
    if (is_array($v)){
      if (isset($v[$lbl])){
        return $i;
      }
    } else {
      if ($v==$lbl){
        return $i;
      }
    }
  }
  return 0;
}

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

function ezPRVTaddPageNumbers(){
  // this will go through the pageNumbering array and add the page numbers are required
  if (isset($this->ez['pageNumbering'])){
    $totalPages1 = $this->ezPageCount;
    $tmp1=$this->ez['pageNumbering'];
    $status=0;
    foreach($tmp1 as $i=>$tmp){
      // do each of the page numbering systems
      // firstly, find the total pages for this one
      $k = $this->ezPRVTpageNumberSearch('stopt',$tmp);
      if ($k && $k>0){
        $totalPages = $k-1;
      } else {
        $l = $this->ezPRVTpageNumberSearch('stoptn',$tmp);
        if ($l && $l>0){
          $totalPages = $l;