| 1 |
<?php |
| 2 |
|
| 3 |
/** |
| 4 |
* Thumber wraps the functionality required to |
| 5 |
* generate thumbnails for arbitrary documents. |
| 6 |
* |
| 7 |
* @author drossiter |
| 8 |
*/ |
| 9 |
class DG_Thumber { |
| 10 |
/** |
| 11 |
* Blocks instantiation. All functionality is static. |
| 12 |
*/ |
| 13 |
private function __construct() { |
| 14 |
|
| 15 |
} |
| 16 |
|
| 17 |
/** |
| 18 |
* Wraps generation of thumbnails for various attachment filetypes. |
| 19 |
* |
| 20 |
* @filter dg_thumbers Allows developers to filter the Thumbers used |
| 21 |
* for specific filetypes. Index is the regex to match file extensions |
| 22 |
* supported and the value is anything that can be accepted by call_user_func(). |
| 23 |
* The function must take two parameters, 1st is the int ID of the attachment |
| 24 |
* to get a thumbnail for, 2nd is the page to take a thumbnail of |
| 25 |
* (may not be relevant for some filetypes). |
| 26 |
* |
| 27 |
* NOTE: Last thumber in array *must* match ALL extensions (i.e.: ".*") |
| 28 |
* |
| 29 |
* @param type $ID Document ID |
| 30 |
* @return string URL to the thumbnail. |
| 31 |
*/ |
| 32 |
public static function getThumbnail($ID, $pg = 1) { |
| 33 |
static $thumbers = array(); |
| 34 |
|
| 35 |
if (!$thumbers) { |
| 36 |
global $wp_version; |
| 37 |
|
| 38 |
// Audio/Video embedded images |
| 39 |
if (version_compare($wp_version, '3.6', '>=')) { |
| 40 |
$exts = implode('|', self::getAudioVideoExts()); |
| 41 |
$thumbers[$exts] = array('Thumber', 'getAudioVideoThumbnail'); |
| 42 |
} |
| 43 |
|
| 44 |
// Ghostscript |
| 45 |
if (self::isGhostscriptAvailable()) { |
| 46 |
$exts = implode('|', self::getGhostscriptExts()); |
| 47 |
$thumbers[$exts] = array('Thumber', 'getGhostscriptThumbnail'); |
| 48 |
} |
| 49 |
|
| 50 |
// Imagick |
| 51 |
if (call_user_func(array( 'WP_Image_Editor_Imagick', 'test'))) { |
| 52 |
try { |
| 53 |
$exts = @Imagick::queryFormats(); |
| 54 |
if($exts) { |
| 55 |
$exts = implode('|', $exts); |
| 56 |
$thumbers[$exts] = array('Thumber', 'getImagickThumbnail'); |
| 57 |
} |
| 58 |
} |
| 59 |
catch (Exception $e) { |
| 60 |
|
| 61 |
} |
| 62 |
} |
| 63 |
|
| 64 |
// Google Drive Viewer |
| 65 |
$exts = implode('|', self::getGoogleDriveExts()); |
| 66 |
$thumbers[$exts] = array('Thumber', 'getGoogleDriveThumbnail'); |
| 67 |
|
| 68 |
// match everything that falls through to the end |
| 69 |
$thumbers['.*'] = array('Thumber', 'getDefaultThumbnail'); |
| 70 |
|
| 71 |
// allow users to filter thumbers used |
| 72 |
$thumbers = apply_filter('dg_thumbers', $thumbers); |
| 73 |
|
| 74 |
// strip out anything that can't be called |
| 75 |
$thumbers = array_filter($thumbers, 'is_callable'); |
| 76 |
} |
| 77 |
|
| 78 |
// if we haven't saved a thumb, generate one |
| 79 |
if(!($url = wp_get_attachment_thumb_url($ID))) { |
| 80 |
$file = get_attached_file($ID); |
| 81 |
|
| 82 |
foreach ($thumbers as $ext_preg => $thumber) { |
| 83 |
$ext_preg = '!\.(\.' . $ext_preg . ')$!i'; |
| 84 |
|
| 85 |
if (preg_match($ext_preg, $file) // can handle ext |
| 86 |
&& ($url = call_user_func($thumber, $ID, $pg))) { // is vaild return |
| 87 |
break; |
| 88 |
} |
| 89 |
} |
| 90 |
} |
| 91 |
|
| 92 |
return $url; |
| 93 |
} |
| 94 |
|
| 95 |
/** |
| 96 |
* Uses wp_read_video_metadata() and wp_read_audio_metadata() to retrieve |
| 97 |
* an embedded image to use as a thumbnail. |
| 98 |
* |
| 99 |
* NOTE: Caller must verify that WP version >= 3.6. |
| 100 |
* |
| 101 |
* @param string $ID The attachment ID to retrieve thumbnail from. |
| 102 |
* @param int $pg Unused. |
| 103 |
* @return bool|string False on failure, URL to thumb on success. |
| 104 |
*/ |
| 105 |
public static function getAudioVideoThumbnail($ID, $pg = 1) { |
| 106 |
$attachment = get_post($ID); |
| 107 |
$doc_path = get_attached_file($ID); |
| 108 |
|
| 109 |
if (preg_match('#^video/#', get_post_mime_type($attachment))) { |
| 110 |
$metadata = wp_read_video_metadata($doc_path); |
| 111 |
} |
| 112 |
elseif (preg_match('#^audio/#', get_post_mime_type($attachment))) { |
| 113 |
$metadata = wp_read_audio_metadata($doc_path); |
| 114 |
} |
| 115 |
|
| 116 |
// unsupported mime type || no embedded image present |
| 117 |
if(!isset($metadata) || empty($metadata['image']['data'])) { |
| 118 |
return false; |
| 119 |
} |
| 120 |
|
| 121 |
self::deleteExistingThumb($ID); |
| 122 |
|
| 123 |
$ext = '.jpg'; |
| 124 |
switch ($metadata['image']['mime']) { |
| 125 |
case 'image/gif': |
| 126 |
$ext = '.gif'; |
| 127 |
break; |
| 128 |
case 'image/png': |
| 129 |
$ext = '.png'; |
| 130 |
break; |
| 131 |
} |
| 132 |
|
| 133 |
$dirname = dirname($doc_path); |
| 134 |
$basename = basename($doc_path); |
| 135 |
|
| 136 |
$thumb_name = self::getUniqueThumbName( |
| 137 |
$dirname, substr($basename, 0, strrpos($basename, '.')), $ext); |
| 138 |
$thumb_path = $dirname . DIRECTORY_SEPARATOR . $thumb_name; |
| 139 |
|
| 140 |
// TODO: This doesn't work... Need alternate to wp_upload_bits() |
| 141 |
$uploaded = wp_upload_bits($thumb_path, null, $metadata['image']['data']); |
| 142 |
|
| 143 |
if (false !== $uploaded['error']) { |
| 144 |
if (WP_DEBUG) { |
| 145 |
error_log("DG: Failed to save AV thumbnail: " . $uploaded['error']); |
| 146 |
} |
| 147 |
|
| 148 |
return false; |
| 149 |
} |
| 150 |
|
| 151 |
self::fixNewThumb($uploaded['file']); |
| 152 |
|
| 153 |
// store reference to new thumbnail |
| 154 |
wp_update_attachment_metadata($ID, array('thumb' => $thumb_name)); |
| 155 |
|
| 156 |
return $uploaded['url']; |
| 157 |
} |
| 158 |
|
| 159 |
/** |
| 160 |
* Uses WP_Image_Editor_Imagick to generate thumbnails. |
| 161 |
* |
| 162 |
* NOTE: Caller must verify that Imagick is present and that the extension is supported. |
| 163 |
* |
| 164 |
* @param string $ID The attachment ID to retrieve thumbnail from. |
| 165 |
* @param int $pg Unused. |
| 166 |
* @return bool|string False on failure, URL to thumb on success. |
| 167 |
*/ |
| 168 |
public static function getImagickThumbnail($ID, $pg = 1) { |
| 169 |
$doc_path = get_attached_file($ID); |
| 170 |
|
| 171 |
$img = wp_get_image_editor($doc_path); |
| 172 |
if(is_wp_error($img)) { |
| 173 |
return false; |
| 174 |
} |
| 175 |
|
| 176 |
$doc_url = wp_get_attachment_url($ID); |
| 177 |
$dirname = dirname($doc_path); |
| 178 |
$basename = basename($doc_path); |
| 179 |
|
| 180 |
self::deleteExistingThumb($ID); |
| 181 |
|
| 182 |
$thumb_name = self::getUniqueThumbName( |
| 183 |
$dirname, substr($basename, 0, strrpos($basename, '.'))); |
| 184 |
$thumb_path = $dirname . DIRECTORY_SEPARATOR . $thumb_name; |
| 185 |
|
| 186 |
$img->resize(150, 150, false); |
| 187 |
$img->save($thumb_path); |
| 188 |
|
| 189 |
// ensure perms are correct |
| 190 |
$stat = stat($dirname); |
| 191 |
$perms = $stat['mode'] & 0000666; |
| 192 |
@chmod($thumb_path, $perms); |
| 193 |
|
| 194 |
// store reference to new thumbnail |
| 195 |
wp_update_attachment_metadata($ID, array('thumb' => $thumb_name)); |
| 196 |
|
| 197 |
// return URL pointing to new thumbnail |
| 198 |
return preg_replace('#'.preg_quote($basename).'$#', $thumb_name, $doc_url); |
| 199 |
} |
| 200 |
|
| 201 |
/** |
| 202 |
* Get thumbnail for document with given ID using Ghostscript. Imagick could |
| 203 |
* also handle this, but is *much* slower. |
| 204 |
* |
| 205 |
* NOTE: Caller must verify that exec and gs are available and that extension is supported. |
| 206 |
* |
| 207 |
* @param string $ID The attachment ID to retrieve thumbnail from. |
| 208 |
* @param int $pg The page number to make thumbnail of -- index starts at 1. |
| 209 |
* @return bool|string False on failure, URL to thumb on success. |
| 210 |
*/ |
| 211 |
public static function getGhostscriptThumbnail($ID, $pg = 1) { |
| 212 |
static $gs = false; |
| 213 |
if (!$gs) { |
| 214 |
// I don't understand why anyone would run a Windows server... |
| 215 |
$gs = (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' ? 'gswin32c' : 'gs') |
| 216 |
. ' -sDEVICE=png16m -dFirstPage=%d -dLastPage=%d -dBATCH' |
| 217 |
. ' -dNOPAUSE -dPDFFitPage -sOutputFile=%s %s'; |
| 218 |
} |
| 219 |
|
| 220 |
$doc_path = get_attached_file($ID); |
| 221 |
$doc_url = wp_get_attachment_url($ID); |
| 222 |
$dirname = dirname($doc_path); |
| 223 |
$basename = basename($doc_path); |
| 224 |
|
| 225 |
self::deleteExistingThumb($ID); |
| 226 |
|
| 227 |
$thumb_name = self::getUniqueThumbName( |
| 228 |
$dirname, substr($basename, 0, strrpos($basename, '.'))); |
| 229 |
$thumb_path = $dirname . DIRECTORY_SEPARATOR . $thumb_name; |
| 230 |
|
| 231 |
exec(sprintf($gs, $pg, $pg, $thumb_path, $doc_path), $out, $ret); |
| 232 |
|
| 233 |
if ($ret != 0) { |
| 234 |
error_log('DG: Ghostscript failed: ' . $out); |
| 235 |
@unlink($thumb_path); |
| 236 |
return false; |
| 237 |
} |
| 238 |
|
| 239 |
self::fixNewThumb($thumb_path); |
| 240 |
|
| 241 |
// store reference to new thumbnail |
| 242 |
wp_update_attachment_metadata($ID, array('thumb' => $thumb_name)); |
| 243 |
|
| 244 |
// return URL pointing to new thumbnail |
| 245 |
return preg_replace('#'.preg_quote($basename).'$#', $thumb_name, $doc_url); |
| 246 |
} |
| 247 |
|
| 248 |
/** |
| 249 |
* Get thumbnail for document with given ID from Google Drive Viewer. |
| 250 |
* |
| 251 |
* NOTE: Caller must verify that extension is supported. |
| 252 |
* |
| 253 |
* @param string $ID The attachment ID to retrieve thumbnail from. |
| 254 |
* @param int $pg The page number to make thumbnail of -- index starts at 1. |
| 255 |
* @return bool|string False on failure, URL to thumb on success. |
| 256 |
*/ |
| 257 |
public static function getGoogleDriveThumbnail($ID, $pg = 1) { |
| 258 |
// User agent for Lynx 2.8.7rel.2 -- Why? Because I can. |
| 259 |
static $user_agent = "Lynx/2.8.7rel.2 libwww-FM/2.14 SSL-MM/1.4.1 OpenSSL/1.0.0a"; |
| 260 |
static $timeout = 90; |
| 261 |
|
| 262 |
$exts = self::getGoogleDriveExts(); |
| 263 |
$google_viewer = "https://docs.google.com/viewer?url=%s&a=bi&pagenumber=%d&w=%d"; |
| 264 |
$doc_path = get_attached_file($ID); |
| 265 |
$doc_url = wp_get_attachment_url($ID); |
| 266 |
$basename = basename($doc_path); |
| 267 |
$dirname = dirname($doc_path); |
| 268 |
|
| 269 |
// check whether filetype supported by Google Drive Viewer |
| 270 |
if (!in_array(strtolower(self::getExt($basename)), $exts)) |
| 271 |
return false; |
| 272 |
|
| 273 |
self::deleteExistingThumb($ID); |
| 274 |
|
| 275 |
$thumb_name = self::getUniqueThumbName( |
| 276 |
$dirname, substr($basename, 0, strrpos($basename, '.'))); |
| 277 |
$thumb_path = $dirname . DIRECTORY_SEPARATOR . $thumb_name; |
| 278 |
|
| 279 |
// args for use in HTTP request |
| 280 |
$args = array( |
| 281 |
'timeout' => $timeout, // these requests can take a LONG time |
| 282 |
'redirection' => 5, |
| 283 |
'httpversion' => '1.0', |
| 284 |
'user-agent' => self::$user_agent, |
| 285 |
'blocking' => true, |
| 286 |
'headers' => array(), |
| 287 |
'cookies' => array(), |
| 288 |
'body' => null, |
| 289 |
'compress' => false, |
| 290 |
'decompress' => true, |
| 291 |
'sslverify' => true, |
| 292 |
'stream' => true, |
| 293 |
'filename' => $thumb_path |
| 294 |
); |
| 295 |
|
| 296 |
// prevent PHP timeout before HTTP completes |
| 297 |
set_time_limit($timeout); |
| 298 |
|
| 299 |
$google_viewer = sprintf($google_viewer, urlencode($doc_url), (int) $pg, 150); |
| 300 |
|
| 301 |
// get thumbnail from Google Drive Viewer & check for error on return |
| 302 |
$response = wp_remote_get($google_viewer, $args); |
| 303 |
|
| 304 |
if (is_wp_error($response) || $response['response']['code'] != 200) { |
| 305 |
error_log('DG: Failed to retrieve thumbnail from Google: ' . |
| 306 |
(is_wp_error($response) |
| 307 |
? $response->get_error_message() |
| 308 |
: $response['response']['message'])); |
| 309 |
|
| 310 |
@unlink($thumb_path); |
| 311 |
return false; |
| 312 |
} |
| 313 |
|
| 314 |
self::fixNewThumb($thumb_path); |
| 315 |
|
| 316 |
// store reference to new thumbnail |
| 317 |
wp_update_attachment_metadata($ID, array('thumb' => $thumb_name)); |
| 318 |
|
| 319 |
// return URL pointing to new thumbnail |
| 320 |
return preg_replace('#'.preg_quote($basename).'$#', $thumb_name, $doc_url); |
| 321 |
} |
| 322 |
|
| 323 |
/** |
| 324 |
* Get thumbnail for document with given ID from default images. |
| 325 |
* |
| 326 |
* @param string $ID The attachment ID to retrieve thumbnail from. |
| 327 |
* @param int $pg Unused. |
| 328 |
* @return string URL to thumbnail. |
| 329 |
*/ |
| 330 |
public static function getDefaultThumbnail($ID, $pg = 1) { |
| 331 |
$icon_url = DG_URL . 'icons/'; |
| 332 |
|
| 333 |
$url = wp_get_attachment_url($ID); |
| 334 |
$ext = self::getExt(basename($url)); |
| 335 |
|
| 336 |
// handle images |
| 337 |
if (wp_attachment_is_image($ID) && |
| 338 |
($icon = wp_get_attachment_image_src($ID, 'thumbnail', false))) { |
| 339 |
$icon = $icon[0]; |
| 340 |
} |
| 341 |
// default extension icon |
| 342 |
elseif ($name = self::getDefaultIcon($ext)) { |
| 343 |
$icon = $icon_url . $name; |
| 344 |
} |
| 345 |
// fallback to standard WP icons |
| 346 |
elseif ($icon = wp_get_attachment_image_src($ID, null, true)) { |
| 347 |
$icon = $icon[0]; |
| 348 |
} |
| 349 |
// everything failed. This is bad... |
| 350 |
else { |
| 351 |
$icon = $icon_url . 'missing.png'; |
| 352 |
} |
| 353 |
|
| 354 |
return $icon; |
| 355 |
} |
| 356 |
|
| 357 |
/** |
| 358 |
* @return array All extensions supported by Google Drive Viewer. |
| 359 |
*/ |
| 360 |
private static function getGoogleDriveExts() { |
| 361 |
return array( |
| 362 |
'tiff', 'bmp', 'doc', 'docx', 'xls', 'xlsx', 'ppt', 'pptx', |
| 363 |
'pdf', 'pages', 'ai', 'psd', 'dxf', 'svg', 'eps', 'ps', 'ttf' |
| 364 |
); |
| 365 |
} |
| 366 |
|
| 367 |
/** |
| 368 |
* @return array All extensions supported by Ghostscript. |
| 369 |
*/ |
| 370 |
private static function getGhostscriptExts() { |
| 371 |
return array('pdf'); |
| 372 |
} |
| 373 |
|
| 374 |
/** |
| 375 |
* @return array All extensions supported by WP Audio Video Media metadata. |
| 376 |
*/ |
| 377 |
private static function getAudioVideoExts() { |
| 378 |
return array_merge(wp_get_audio_extensions(), wp_get_video_extensions()); |
| 379 |
} |
| 380 |
|
| 381 |
/** |
| 382 |
* @param string $dirname Directory where the document is located. |
| 383 |
* @param string $basename Filename of document minue the extension. |
| 384 |
* @param string $ext The extension of the image to be created. |
| 385 |
* @return string Name unique within the directory given, derived from the basename given. |
| 386 |
*/ |
| 387 |
private static function getUniqueThumbName($dirname, $basename, $ext = '.png') { |
| 388 |
return wp_unique_filename($dirname, str_replace('.', '-', $basename) . '-thumb' . $ext); |
| 389 |
} |
| 390 |
|
| 391 |
/** |
| 392 |
* Removes the existing thumbnail for the attachment |
| 393 |
* with $ID, if such a thumbnail exists. |
| 394 |
* |
| 395 |
* Substantially borrowed from wp_delete_attachment() in wp-includes/post.php |
| 396 |
* |
| 397 |
* @filter wp_delete_file Filter the path of the file to delete. |
| 398 |
* @global type $wpdb |
| 399 |
* @param type $ID |
| 400 |
*/ |
| 401 |
private static function deleteExistingThumb($ID) { |
| 402 |
global $wpdb; |
| 403 |
|
| 404 |
$meta = wp_get_attachment_metadata($ID); |
| 405 |
|
| 406 |
if (empty($meta['thumb'])) |
| 407 |
return; |
| 408 |
|
| 409 |
$doc_path = get_attached_file($ID); |
| 410 |
|
| 411 |
// Don't delete the thumb if another attachment uses it |
| 412 |
$SQL = 'SELECT meta_id ' |
| 413 |
. "FROM $wpdb->postmeta " |
| 414 |
. 'WHERE meta_key = \'_wp_attachment_metadata\' ' |
| 415 |
. 'AND meta_value LIKE %s ' |
| 416 |
. 'AND post_id <> %d'; |
| 417 |
|
| 418 |
if (!$wpdb->get_row($wpdb->prepare($SQL, '%' . $meta['thumb'] . '%', $ID))) { |
| 419 |
$thumb_path = str_replace(basename($doc_path), $meta['thumb'], $doc_path); |
| 420 |
// This filter is documented in wp-admin/custom-header.php |
| 421 |
$thumb_path = apply_filters('wp_delete_file', $thumb_path); |
| 422 |
@unlink($thumb_path); |
| 423 |
} |
| 424 |
} |
| 425 |
|
| 426 |
/** |
| 427 |
* Cleans up dimensions and permissions for a newly-created thumbnail. |
| 428 |
* @param type $thumb_path |
| 429 |
* @return type |
| 430 |
*/ |
| 431 |
private static function fixNewThumb($thumb_path) { |
| 432 |
// ensure perms are correct |
| 433 |
$stat = stat(dirname($thumb_path)); |
| 434 |
$perms = $stat['mode'] & 0000666; |
| 435 |
@chmod($thumb_path, $perms); |
| 436 |
|
| 437 |
// scae to no larger than 150x150px |
| 438 |
$img = wp_get_image_editor($thumb_path); |
| 439 |
|
| 440 |
if (is_wp_error($img)) { |
| 441 |
error_log('DG: Failed to get image editor. Can\'t resize thumbnail.'); |
| 442 |
return; |
| 443 |
} |
| 444 |
|
| 445 |
$img->resize(150, 150, false); |
| 446 |
$img->save($thumb_path); |
| 447 |
} |
| 448 |
|
| 449 |
/** |
| 450 |
* Checks whether we may call gs through exec(). |
| 451 |
* @staticvar bool $available |
| 452 |
* @return bool |
| 453 |
*/ |
| 454 |
private static function isGhostscriptAvailable() { |
| 455 |
static $available; |
| 456 |
|
| 457 |
if (!isset($available)) { |
| 458 |
$is_win = strtoupper(substr(PHP_OS, 0, 3)) === 'WIN'; |
| 459 |
$gs = $is_win ? 'gswin32c' : 'gs'; |
| 460 |
|
| 461 |
$available = self::isExecAvailable(); |
| 462 |
$exec = exec($is_win ? "where $gs" : "which $gs"); |
| 463 |
$available = $available && !empty($exec); |
| 464 |
|
| 465 |
if (WP_DEBUG && $available) { |
| 466 |
error_log("DG: Found the $gs executable."); |
| 467 |
} |
| 468 |
else if (WP_DEBUG) { |
| 469 |
error_log("DG: Didn\'t find the $gs executable."); |
| 470 |
} |
| 471 |
} |
| 472 |
|
| 473 |
return $available; |
| 474 |
} |
| 475 |
|
| 476 |
/** |
| 477 |
* Checks whether exec() may be used. |
| 478 |
* Source: http://stackoverflow.com/a/12980534/866618 |
| 479 |
* @staticvar bool $available |
| 480 |
* @return bool |
| 481 |
*/ |
| 482 |
private static function isExecAvailable() { |
| 483 |
static $available; |
| 484 |
|
| 485 |
if (!isset($available)) { |
| 486 |
$available = true; |
| 487 |
|
| 488 |
if (ini_get('safe_mode')) { |
| 489 |
$available = false; |
| 490 |
} |
| 491 |
else { |
| 492 |
$d = ini_get('disable_functions'); |
| 493 |
$s = ini_get('suhosin.executor.func.blacklist'); |
| 494 |
if ("$d$s") { |
| 495 |
$array = preg_split('/,\s*/', "$d,$s"); |
| 496 |
if (in_array('exec', $array)) { |
| 497 |
$available = false; |
| 498 |
} |
| 499 |
} |
| 500 |
} |
| 501 |
|
| 502 |
if (WP_DEBUG) { |
| 503 |
error_log('DG: exec() ' . ($available ? 'is' : 'isn\'t') . ' available.'); |
| 504 |
} |
| 505 |
} |
| 506 |
|
| 507 |
return $available; |
| 508 |
} |
| 509 |
|
| 510 |
/** |
| 511 |
* Formerly achieved with wp_check_filetype(), but it was only returning |
| 512 |
* valid results if the active user had permission to upload the given filetype. |
| 513 |
* |
| 514 |
* @param type $filename Name of the file to get extension from. |
| 515 |
* @return str|bool Returns the file extension on success, false on failure. |
| 516 |
*/ |
| 517 |
private static function getExt($filename) { |
| 518 |
foreach (wp_get_mime_types() as $ext_preg => $unused) { |
| 519 |
$ext_preg = '!\.(' . $ext_preg . ')$!i'; |
| 520 |
if (preg_match($ext_preg, $filename, $ext_matches)) { |
| 521 |
return $ext_matches[1]; |
| 522 |
} |
| 523 |
} |
| 524 |
|
| 525 |
return false; |
| 526 |
} |
| 527 |
|
| 528 |
/** |
| 529 |
* Returns the name of the image to represent the filetype given. |
| 530 |
* @staticvar array $exts |
| 531 |
* @param type $filename |
| 532 |
* @return boolean |
| 533 |
*/ |
| 534 |
private static function getDefaultIcon($ext) { |
| 535 |
// Maps file ext to default image name. |
| 536 |
static $exts = array( |
| 537 |
// Most Common First |
| 538 |
'pdf' => 'pdf.png', |
| 539 |
|
| 540 |
// MS Office |
| 541 |
'doc|docx|docm|dotx|dotm' => 'msdoc.png', |
| 542 |
'ppt|pot|pps|pptx|pptm|ppsx|ppsm|potx|potm|ppam|sldx|sldm' => 'msppt.png', |
| 543 |
'xla|xls|xlt|xlw|xlsx|xlsm|xlsb|xltx|xltm|xlam' => 'msxls.png', |
| 544 |
'mdb' => 'msaccess.png', |
| 545 |
|
| 546 |
// iWork |
| 547 |
'key' => 'key.png', |
| 548 |
'numbers' => 'numbers.png', |
| 549 |
'pages' => 'pages.png', |
| 550 |
|
| 551 |
// Images |
| 552 |
'jpg|jpeg|jpe|gif|png|bmp|tif|tiff|ico' => 'image.png', |
| 553 |
|
| 554 |
// Video formats |
| 555 |
'asf|asx|wmv|wmx|wm|avi|divx|flv|mov' => 'video.png', |
| 556 |
'qt|mpeg|mpg|mpe|mp4|m4v|ogv|webm|mkv' => 'video.png', |
| 557 |
|
| 558 |
// Audio formats |
| 559 |
'mp3|m4a|m4b|ra|ram|wav|ogg|oga|wma|wax|mka' => 'audio.png', |
| 560 |
'midi|mid' => 'midi.png', |
| 561 |
|
| 562 |
// Text formats |
| 563 |
'txt|tsv|csv' => 'text.png', |
| 564 |
'rtx' => 'rtx.png', |
| 565 |
'rtf' => 'rtf.png', |
| 566 |
'ics' => 'ics.png', |
| 567 |
'wp|wpd' => 'wordperfect.png', |
| 568 |
|
| 569 |
// Programming |
| 570 |
'html|htm' => 'html.png', |
| 571 |
'css' => 'css.png', |
| 572 |
'js' => 'javascript.png', |
| 573 |
'class' => 'java.png', |
| 574 |
'asc' => 'asc.png', |
| 575 |
'c' => 'c.png', |
| 576 |
'cc|cpp' => 'cpp.png', |
| 577 |
'h' => 'h.png', |
| 578 |
|
| 579 |
// Msc application formats |
| 580 |
'zip|tar|gzip|gz|bz2|tgz|7z|rar' => 'compressed.png', |
| 581 |
'exe' => 'exec.png', |
| 582 |
'swf' => 'shockwave.png', |
| 583 |
|
| 584 |
// OpenDocument formats |
| 585 |
'odt' => 'opendocument-text.png', |
| 586 |
'odp' => 'opendocument-presentation.png', |
| 587 |
'ods' => 'opendocument-spreadsheet.png', |
| 588 |
'odg' => 'opendocument-graphics.png', |
| 589 |
'odb' => 'opendocument-database.png', |
| 590 |
'odf' => 'opendocument-formula.png' |
| 591 |
); |
| 592 |
|
| 593 |
foreach ($exts as $ext_preg => $icon) { |
| 594 |
$ext_preg = '!(' . $ext_preg . ')$!i'; |
| 595 |
if (preg_match($ext_preg, $ext)) { |
| 596 |
return $icon; |
| 597 |
} |
| 598 |
} |
| 599 |
|
| 600 |
return false; |
| 601 |
} |
| 602 |
} |
| 603 |
|
| 604 |
?> |
| 605 |
|
