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Add mime type icons and thumbnail previews to link list
This commit is contained in:
Nathan Gray
parent
4bf66e6f89
commit
33d8386f27
172
etemplate/inc/thumbnail.inc.php
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172
etemplate/inc/thumbnail.inc.php
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<?php
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$GLOBALS['egw_info']['flags'] = array(
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'currentapp' => 'infolog',
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'noheader' => true,
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'nonavbar' => true
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);
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include ('../../header.inc.php');
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$thumbnail = get_thumbnail($_GET['image'], true);
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if($thumbnail) {
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header('Content-Type: image/png');
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imagepng( $thumbnail );
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}
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/**
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* Private function to get a thumbnail image for a linked image file.
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*
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* This function creates a thumbnail of the given image, if possible, and stores it in $GLOBALS['egw_info']['server']['temp_dir'].
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* Returns the image, or false if the file could not be thumbnailed. Thumbnails are PNGs.
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*
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* @param array $file VFS File array to thumbnail
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* @return image or false
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*
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* @author Nathan Gray
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*/
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function get_thumbnail($file, $return_data = true) {
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$max_width = $max_height = $GLOBALS['egw_info']['server']['link_list_thumbnail'];
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if($max_width == 0) {
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// thumbnailing disabled
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return false;
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} elseif( !gdVersion() ) {
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// GD disabled or not installed
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return false;
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}
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// Quality
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$g_imgcomp=55;
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$g_srcfile = $GLOBALS['egw_info']['server']['files_dir'] . $file;
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$g_dstfile = $GLOBALS['egw_info']['server']['temp_dir'] . $file;
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$dir_array = explode(DIRECTORY_SEPARATOR, $g_dstfile);
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array_pop($dir_array);
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$dest_dir = implode(DIRECTORY_SEPARATOR, $dir_array);
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@mkdir($dest_dir, 0700, true);
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if(file_exists($g_srcfile)) {
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$bolink = CreateObject('phpgwapi.bolink');
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$read = $bolink->vfs->acl_check(array(
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'string' => $file,
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'relatives' => array (),
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'operation' => EGW_ACL_READ
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));
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if(!$read) {
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$im = @imagecreatetruecolor(strlen(lang('access not permitted')) * 7, 20);
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$text_color = imagecolorallocate($im, 233, 14, 91);
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imagestring($im, 2,5,3, lang('access not permitted'), $text_color);
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return $return_data ? $im : false;
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}
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// Check for existing thumbnail
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if(file_exists($g_dstfile) && filemtime($g_dstfile) == filemtime($g_srcfile)) {
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return $return_data ? imagecreatefrompng($g_dstfile) : $g_dstfile;
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}
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$g_is=getimagesize($g_srcfile);
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if($g_is[0] < $max_width && $g_is[1] < $max_height) {
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$g_iw = $g_is[0];
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$g_ih = $g_is[1];
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} elseif(($g_is[0]-$max_width)>=($g_is[1]-$max_height)) {
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$g_iw=$max_width;
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$g_ih=($max_width/$g_is[0])*$g_is[1];
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} else {
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$g_ih=$max_height;
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$g_iw=($g_ih/$g_is[1])*$g_is[0];
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}
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// Get mime type
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$info = $bolink->vfs->ls(array(
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'string' => $file
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));
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list($type, $image_type) = explode('/', $info[0]['mime_type']);
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if($type != 'image') {
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return false;
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}
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switch ($image_type) {
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case 'png':
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$img_src = imagecreatefrompng($g_srcfile);
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break;
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case 'jpg':
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$img_src = imagecreatefromjpg($g_srcfile);
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break;
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case 'gif':
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$img_src = imagecreatefromgif($g_srcfile);
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break;
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case 'bmp':
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$img_src = imagecreatefromwbmp($g_srcfile);
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break;
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default:
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return false;
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}
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if(!($gdVersion = gdVersion())) {
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return false;
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} elseif ($gdVersion >= 2) {
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$img_dst=imagecreatetruecolor($g_iw,$g_ih);
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imageSaveAlpha($img_dst, true);
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$trans_color = imagecolorallocatealpha($img_dst, 0, 0, 0, 127);
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imagefill($img_dst, 0, 0, $trans_color);
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} else {
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$img_dst = imagecreate($g_iw, $g_ih);
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}
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imagecopyresampled($img_dst, $img_src, 0, 0, 0, 0, $g_iw, $g_ih, $g_is[0], $g_is[1]);
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return $return_data ? $img_dst : $g_dstfile;
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} else {
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if(file_exists($g_dstfile)) {
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unlink($g_dstfile);
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}
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return false;
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}
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}
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/**
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* Get which version of GD is installed, if any.
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*
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* Returns the version (1 or 2) of the GD extension.
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* Off the php manual page, thanks Hagan Fox
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*/
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function gdVersion($user_ver = 0)
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{
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if (! extension_loaded('gd')) { return; }
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static $gd_ver = 0;
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// Just accept the specified setting if it's 1.
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if ($user_ver == 1) { $gd_ver = 1; return 1; }
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// Use the static variable if function was called previously.
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if ($user_ver !=2 && $gd_ver > 0 ) { return $gd_ver; }
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// Use the gd_info() function if possible.
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if (function_exists('gd_info')) {
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$ver_info = gd_info();
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preg_match('/\d/', $ver_info['GD Version'], $match);
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$gd_ver = $match[0];
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return $match[0];
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}
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// If phpinfo() is disabled use a specified / fail-safe choice...
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if (preg_match('/phpinfo/', ini_get('disable_functions'))) {
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if ($user_ver == 2) {
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$gd_ver = 2;
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return 2;
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} else {
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$gd_ver = 1;
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return 1;
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}
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}
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// ...otherwise use phpinfo().
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ob_start();
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phpinfo(8);
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$info = ob_get_contents();
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ob_end_clean();
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$info = stristr($info, 'gd version');
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preg_match('/\d/', $info, $match);
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$gd_ver = $match[0];
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return $match[0];
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}
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?>
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