chamilo-lms/main/document/slideshow.php

<?php
/* For licensing terms, see /license.txt */
/**
 * @author Patrick Cool patrick.cool@UGent.be Ghent University Mai 2004
 * @author Julio Montoya Lots of improvements, cleaning, adding security
 * @author Juan Carlos Raña Trabado herodoto@telefonica.net	January 2008
 * @package chamilo.document
 */
/**
 * Code
 */
// Language files that need to be included
$language_file = array('slideshow', 'document');

require_once '../inc/global.inc.php';

$noPHP_SELF = true;
$path = Security::remove_XSS($_GET['curdirpath']);
$pathurl = urlencode($path);
$slide_id = Security::remove_XSS($_GET['slide_id']);

if(empty($slide_id)) {
	$edit_slide_id = 1;
} else {
	$edit_slide_id = $slide_id;
}

if ($path != '/') {
	$folder = $path.'/';
} else {
	$folder = '/';
}
$sys_course_path = api_get_path(SYS_COURSE_PATH);

// Including the functions for the slideshow
require_once 'slideshow.inc.php';

// Breadcrumb navigation
$url = 'document.php?curdirpath='.$pathurl;
$originaltoolname = get_lang('Documents');
$interbreadcrumb[] = array('url' => Security::remove_XSS($url), 'name' => $originaltoolname);

// Because $nametools uses $_SERVER['PHP_SELF'] for the breadcrumbs instead of $_SERVER['REQUEST_URI'], I had to
// bypass the $nametools thing and use <b></b> tags in the $interbreadcrump array
//$url = 'slideshow.php?curdirpath='.$pathurl;
$originaltoolname = get_lang('SlideShow');
//$interbreadcrumb[] = array('url'=>$url, 'name' => $originaltoolname);

Display :: display_header($originaltoolname, 'Doc');

// Loading the slides from the session
if (isset($_SESSION['image_files_only'])) {
	$image_files_only = $_SESSION['image_files_only'];
}

// Calculating the current slide, next slide, previous slide and the number of slides
if ($slide_id != 'all') {
	$slide = $slide_id ? $slide_id : 0;
	$previous_slide = $slide - 1;
	$next_slide = $slide + 1;
}
$total_slides = count($image_files_only);
?>
<script language="JavaScript" type="text/javascript">
<!--
function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
//-->
</script>

<div class="actions">
<?php

if ($slide_id != 'all') {
	$image = $sys_course_path.$_course['path'].'/document'.$folder.$image_files_only[$slide];
	if (file_exists($image)) {

		echo '<div style="float: right; vertical-align: middle; padding-top: 3px; padding-bottom: 3px;"><nobr>';

		$a_style = 'margin-left: 0px; margin-right: 0px; padding-left: 0px; padding-right: 0px;';
		$img_style = 'margin-left: 5px; margin-right: 5px; padding-left: 0px; padding-right: 0px;';

		// Back forward buttons
		if ($slide == 0) {
			$imgp = 'action_prev_na.png';
			$first = '<img src="'.api_get_path(WEB_IMG_PATH).'action_first_na.png" style="'.$img_style.'">';
		} else {
			$imgp = 'action_prev.png';
			$first = '<a href="slideshow.php?slide_id=0&curdirpath='.$pathurl.'" style="'.$a_style.'"><img src="'.api_get_path(WEB_IMG_PATH).'action_first.png"  style="'.$img_style.'" title="'.get_lang('FirstSlide').'" alt="'.get_lang('FirstSlide').'"></a>';
		}

		// First slide
		echo $first;

		// Previous slide
		if ($slide > 0) {
			echo '<a href="slideshow.php?slide_id='.$previous_slide.'&amp;curdirpath='.$pathurl.'" style="'.$a_style.'">';
		}
		echo '<img src="'.api_get_path(WEB_IMG_PATH).$imgp.'" style="'.$img_style.'" title="'.get_lang('Previous').'" alt="'.get_lang('Previous').'">';
		if ($slide > 0) {
			echo '</a>';
		}

		// Divider
		echo ' [ '.$next_slide.'/'.$total_slides.' ] ';

		// Next slide
		if ($slide < $total_slides - 1) {
			echo '<a href="slideshow.php?slide_id='.$next_slide.'&curdirpath='.$pathurl.'" style="'.$a_style.'">';
		}
		if ($slide == $total_slides - 1) {
			$imgn = 'action_next_na.png';
			$last = '<img src="'.api_get_path(WEB_IMG_PATH).'action_last_na.png" style="'.$img_style.'" title="'.get_lang('LastSlide').'" alt="'.get_lang('LastSlide').'">';
		} else {
			$imgn = 'action_next.png';
			$last = '<a href="slideshow.php?slide_id='.($total_slides-1).'&curdirpath='.$pathurl.'" style="'.$a_style.'"><img src="'.api_get_path(WEB_IMG_PATH).'action_last.png" style="'.$img_style.'" title="'.get_lang('LastSlide').'" alt="'.get_lang('LastSlide').'"></a>';
		}
		echo '<img src="'.api_get_path(WEB_IMG_PATH).$imgn.'" style="'.$img_style.'" title="'.get_lang('Next').'" alt="'.get_lang('Next').'">';
		if ($slide > 0) {
			echo '</a>';
		}

		// Last slide
		echo $last;

		echo '</nobr></div>';
	}
}

// Exit the slideshow
echo '<a href="document.php?action=exit_slideshow&curdirpath='.$pathurl.'">'.Display::return_icon('back.png',get_lang('BackTo').' '.get_lang('DocumentsOverview'),'',ICON_SIZE_MEDIUM).'</a>';

// Show thumbnails
if ($slide_id != 'all') {
	echo '<a href="slideshow.php?slide_id=all&curdirpath='.$pathurl.'">'.Display::return_icon('thumbnails.png',get_lang('_show_thumbnails'),'',ICON_SIZE_MEDIUM).'</a>';
} else {
	echo Display::return_icon('thumbnails_na.png',get_lang('_show_thumbnails'),'',ICON_SIZE_MEDIUM);
}
// Slideshow options
echo '<a href="slideshowoptions.php?curdirpath='.$pathurl.'">'.Display::return_icon('settings.png',get_lang('_set_slideshow_options'),'',ICON_SIZE_MEDIUM).'</a>';

?>
</div>

<?php
echo '<br />';

/*	TREATING THE POST DATA FROM SLIDESHOW OPTIONS */

// If we come from slideshowoptions.php we sessionize (new word !!! ;-) the options
if (isset($_POST['Submit'])) {
	// We come from slideshowoptions.php
	
	//$_SESSION["auto_image_resizing"]=Security::remove_XSS($_POST['auto_radio_resizing']);
	
	$_SESSION["image_resizing"] = Security::remove_XSS($_POST['radio_resizing']);
	
	if ($_POST['radio_resizing'] == "resizing" && $_POST['width'] != '' && $_POST['height'] != '') {
		//echo "resizing";
		$_SESSION["image_resizing_width"] = Security::remove_XSS($_POST['width']);
		$_SESSION["image_resizing_height"] = Security::remove_XSS($_POST['height']);
	} else {
		//echo "unsetting the session heighte and width";
		$_SESSION["image_resizing_width"] = null;
		$_SESSION["image_resizing_height"] = null;
	}
}
$target_width = $target_height = null;
// The target height and width depends if we choose resizing or no resizing
if (isset($_SESSION["image_resizing"]) &&  $_SESSION["image_resizing"] == "resizing") {
	$target_width = $_SESSION["image_resizing_width"];
	$target_height = $_SESSION["image_resizing_height"];
}

/*	THUMBNAIL VIEW */

// This is for viewing all the images in the slideshow as thumbnails.
$image_tag = array ();
if ($slide_id == 'all') {
	
	// Create the template_thumbnails folder (if no exist)
    if (!$sys_course_path.$_course['path'].'/document'.$folder.'.thumbs/') {
		@mkdir($sys_course_path.$_course['path'].'/document'.$folder.'.thumbs/', api_get_permissions_for_new_directories());
    }
	
	// Config thumbnails
	$row_items 			  = 4;
	$allowed_thumbnail_types = array('jpg','jpeg','gif','png');
	$max_thumbnail_width  = 100;
	$max_thumbnail_height = 100;
	$png_compression	  = 0;//0(none)-9
	$jpg_quality  	      = 75;//from 0 to 100 (default is 75). More queality less compression
	

	// check files and thumbnails
	if (is_array($image_files_only)) {
		foreach ($image_files_only as $one_image_file) {
			$image = $sys_course_path.$_course['path'].'/document'.$folder.$one_image_file;
			$image_thumbnail= $sys_course_path.$_course['path'].'/document'.$folder.'.thumbs/.'.$one_image_file;
			
			if (file_exists($image)) {
				//check thumbnail
				$imagetype = explode(".", $image);
				$imagetype = strtolower($imagetype[count($imagetype)-1]);
				
				if(in_array($imagetype,$allowed_thumbnail_types)) {
					
					if (!file_exists($image_thumbnail)){

						$original_image_size = api_getimagesize($image);
						switch($imagetype) {
							case 'gif':
								$source_img = imagecreatefromgif($image);
								break;
							case 'jpg':
								$source_img = imagecreatefromjpeg($image);
								break;
							case 'png':
								$source_img = imagecreatefrompng($image);
								break;
						}
						
						$new_thumbnail_size = api_calculate_image_size($original_image_size['width'], $original_image_size['height'], $max_thumbnail_width, $max_thumbnail_height);
						$crop = imagecreatetruecolor($new_thumbnail_size['width'], $new_thumbnail_size['height']);
						
						// preserve transparency
						if($imagetype == "png"){
							imagesavealpha($crop, true);
							$color = imagecolorallocatealpha($crop,0x00,0x00,0x00,127);
							imagefill($crop, 0, 0, $color); 
						}
						
						if($imagetype == "gif"){
							 $transindex = imagecolortransparent($image);
							 //GIF89a for transparent and anim (first clip), either GIF87a
							 if($transindex >= 0){
								 $transcol = imagecolorsforindex($image, $transindex);
								 $transindex = imagecolorallocatealpha($crop, $transcol['red'], $transcol['green'], $transcol['blue'], 127);
								 imagefill($crop, 0, 0, $transindex);
								 imagecolortransparent($crop, $transindex);
							 }
							 
						}

						//resampled image
						imagecopyresampled($crop,$source_img,0,0,0,0,$new_thumbnail_size['width'],$new_thumbnail_size['height'],$original_image_size['width'],$original_image_size['height']);
						
						if($imagetype == ("jpg" || "jpeg")) {
							imagejpeg($crop,$image_thumbnail,$jpg_quality);
						}
            			if($imagetype == "png") {
							
                			imagepng($crop,$image_thumbnail,$png_compression);
						}
            			if($imagetype == "gif"){	
                			imagegif($crop,$image_thumbnail);
						}
		
						//clean memory
						imagedestroy($crop);					
					}//end exist thumbnail
					//show thumbnail and link
					$one_image_thumbnail_file='.thumbs/.'.$one_image_file;//get path thumbnail
					$doc_url = ($path && $path !== '/') ? $path.'/'.$one_image_thumbnail_file : $path.$one_image_thumbnail_file;
					$image_tag[] = '<img src="download.php?doc_url='.$doc_url.'" border="0" title="'.$one_image_file.'">';	
				}
				else{
					//image format no support, get path original image
					$image_height_width = resize_image($image, $thumbnail_width, $thumbnail_height, 1);
					$image_height = $image_height_width[0];
					$image_width = $image_height_width[1];
					$doc_url = ($path && $path !== '/') ? $path.'/'.$one_image_file : $path.$one_image_file;
					$image_tag[] = '<img src="download.php?doc_url='.$doc_url.'" border="0" width="'.$max_thumbnail_width.'" height="'.$max_thumbnail_height.'" title="'.$one_image_file.'">';	
				}//end allowed image types
			}//end if exist file image
		}//end foreach
	}//end image files only
}

// Creating the table
$html_table = '';
echo '<table align="center" width="760px" border="0" cellspacing="10">';
$i = 0;
$count_image = count($image_tag);
$number_image = 6;
$number_iteration = ceil($count_image/$number_image);
$p = 0;
for ($k = 0; $k < $number_iteration; $k++) {
	echo '<tr height="'.$thumbnail_height.'">';
	for ($i = 0; $i < $number_image; $i++) {
		if (!is_null($image_tag[$p])) {
			echo '<td>';
			echo '<div align="center"><a href="slideshow.php?slide_id='.$p.'&curdirpath='.$pathurl.' ">'.$image_tag[$p].'</a>';
			echo '</div></td>';
		}
		$p++;
	}
	echo '</tr>';
}
echo '</table>';

/*	ONE AT A TIME VIEW */
$course_id = api_get_course_int_id();

// This is for viewing all the images in the slideshow one at a time.
if ($slide_id != 'all') {

	if (file_exists($image)) {
		$image_height_width = resize_image($image, $target_width, $target_height);

		$image_height = $image_height_width[0];
		$image_width = $image_height_width[1];
	
		$height_width_tags = null;
		if (isset($_SESSION['image_resizing']) && $_SESSION['image_resizing'] == 'resizing') {
			$height_width_tags = 'width="'.$image_width.'" height="'.$image_height.'"';
		}

		// This is done really quickly and should be cleaned up a little bit using the API functions
		$tbl_documents = Database::get_course_table(TABLE_DOCUMENT);
		if ($path == '/') {
			$pathpart = '/';
		} else {
			$pathpart = $path.'/';
		}
		$sql = "SELECT * FROM $tbl_documents WHERE c_id = $course_id AND path='".Database::escape_string($pathpart.$image_files_only[$slide])."'";
		$result = Database::query($sql);
		$row = Database::fetch_array($result);

		echo '<table align="center" border="0" cellspacing="10">';
		echo '<tr>';
		echo '<td align="center">';
		echo Display::tag('h1',$row['title']);
		echo '</td>';
		echo '</tr>';
		echo '<tr>';
		echo '<td id="td_image" align="center">';
		if ($slide < $total_slides - 1 && $slide_id != 'all') {
			echo "<a href='slideshow.php?slide_id=".$next_slide."&curdirpath=$pathurl'>";
		} else {
			echo "<a href='slideshow.php?slide_id=0&curdirpath=$pathurl'>";
		}
        if ($path == '/') {
        	$path = '';
        }

		list($width, $height) = getimagesize($image);
		
		//auto resize
		if($_SESSION["image_resizing"]!="noresizing" && $_SESSION["image_resizing"]!="resizing" ){
		?>
        
		<script type="text/javascript">
			var initial_width='<?php echo $width; ?>';
			var initial_height='<?php echo $height; ?>';
			var height = window.innerHeight -320;
			var width = window.innerWidth -360;
			
			document.write ('<img id="image"  src="<?php echo  'download.php?doc_url='.$path.'/'.$image_files_only[$slide]; ?>" width="'+initial_width+'" height="'+initial_height+'"  border="0"  alt="<?php echo $image_files_only[$slide] ;?>">');

			function resizeImage() {
				
				var resize_factor_width = width / initial_width;
                var resize_factor_height = height / initial_height;
                var delta_width = width - initial_width * resize_factor_height;
    			var delta_height = height - initial_height * resize_factor_width;
    
				if (delta_width > delta_height) {
					width = Math.ceil(initial_width * resize_factor_height);
					height= Math.ceil(initial_height * resize_factor_height);
				}
				else if(delta_width < delta_height) {
					width = Math.ceil(initial_width * resize_factor_width);
					height = Math.ceil(initial_height * resize_factor_width);
				}
				else {
					width = Math.ceil(width);
					height = Math.ceil(height);
				}
				
				document.getElementById('image').style.height = height +"px";
				document.getElementById('image').style.width = width +"px";
				document.getElementById('td_image').style.background='none';
				document.getElementById('image').style.visibility='visible';
			};
			
			 if (initial_height>height || initial_width>width) {
				document.getElementById('image').style.visibility='hidden';
				document.getElementById('td_image').style.background='url(../img/loadingAnimation.gif) center no-repeat';
				document.getElementById('image').onload = resizeImage;
			    window.onresize = resizeImage;
			}

		</script>
    <?php
		}
		else{
		
			echo "<img src='download.php?doc_url=$path/".$image_files_only[$slide]."' alt='".$image_files_only[$slide]."' border='0'".$height_width_tags.">";
		}
		
		echo '</a>';
		echo '</td>';
		echo '</tr>';
		echo '<tr>';
		echo '<td>';
		echo $row['comment'];
		echo '</td>';
		echo '</tr>';
		echo '</table>';
		echo '<table align="center" border="0">';
		if (api_is_allowed_to_edit(null, true)) {
			echo '<tr>';
			echo '<td align="center">';
			echo '<a href="edit_document.php?'.api_get_cidreq().'&id='.$row['id'].'&origin=slideshow&amp;origin_opt='.$edit_slide_id.'&amp;">
			      <img src="../img/edit.gif" border="0" title="'.get_lang('Modify').'" alt="'.get_lang('Modify').'" /></a><br />';
			$aux = explode('.', htmlspecialchars($image_files_only[$slide]));
			$ext = $aux[count($aux) - 1];
			echo $image_files_only[$slide].' <br />';
			echo $width.' x '.$height.' <br />';
			echo round((filesize($image)/1024), 2).' KB';
			echo ' - '.$ext;
			echo '</td>';
			echo '</tr>';
			echo '<tr>';
			echo '<td align="center">';
			if ($_SESSION['image_resizing'] == 'resizing') {
				$resize_info = get_lang('_resizing').'<br />';
				$resize_widht = $_SESSION["image_resizing_width"].' x ';
				$resize_height = $_SESSION['image_resizing_height'];
			}
			elseif($_SESSION['image_resizing'] != 'noresizing'){
				$resize_info = get_lang('_resizing').'<br />';
				$resize_widht = get_lang('Auto').' x ';
				$resize_height = get_lang('Auto');
			} else {
				$resize_info = get_lang('_no_resizing').'<br />';
			}
			echo $resize_info;
			echo $resize_widht;
			echo $resize_height;
			echo '</td>';
			echo '</tr>';
		}
		echo '</table>';

	} else {
		Display::display_warning_message(get_lang('FileNotFound'));
	}
}

Display :: display_footer();