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<?php
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// $Id: imagefield_file.inc,v 1.17 2009/04/01 19:47:22 quicksketch Exp $
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/**
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* @file
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* hook_file and imagefield file functions.
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*/
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/**
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* Implementation of hook_file_insert().
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*/
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function imagefield_file_insert($file) {
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// Currently empty. Thumbnails are now generated on preview.
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}
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/**
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* Implementation of hook_file_delete().
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*
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* Delete the admin thumbnail when the original is deleted.
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*/
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function imagefield_file_delete($file) {
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if (imagefield_file_is_image($file)) {
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file_delete(imagefield_file_admin_thumb_path($file, FALSE));
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}
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}
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/**
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* Simple utility function to check if a file is an image.
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*/
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function imagefield_file_is_image($file) {
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$file = (object)$file;
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return in_array($file->filemime, array('image/jpg', 'image/pjpeg', 'image/jpeg', 'image/png', 'image/gif'));
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}
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/**
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* Given a file, return the path the image thumbnail used while editing.
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*/
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function imagefield_file_admin_thumb_path($file, $create_thumb = TRUE) {
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$file = (object)$file;
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$short_path = preg_replace('/^' . preg_quote(file_directory_path(), '/') . '/', '', $file->filepath);
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$filepath = file_directory_path() . '/imagefield_thumbs' . $short_path;
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if ($create_thumb) {
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imagefield_create_admin_thumb($file->filepath, $filepath);
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}
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return $filepath;
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}
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/**
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* Create a thumbnail to be shown while editing an image.
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*/
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function imagefield_create_admin_thumb($source, $destination) {
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if (!is_file($source)) {
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return FALSE;
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}
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$info = image_get_info($source);
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$size = explode('x', variable_get('imagefield_thumb_size', '100x100'));
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// Check if the destination image needs to be regenerated to match a new size.
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if (is_file($destination)) {
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$thumb_info = image_get_info($destination);
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if ($thumb_info['width'] != $size[0] && $thumb_info['height'] != $size[1] && ($info['width'] > $size[0] || $info['height'] > $size[1])) {
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unlink($destination);
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}
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else {
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return;
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}
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}
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// Ensure the destination directory exists and is writable.
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$directories = explode('/', $destination);
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array_pop($directories); // Remove the file itself.
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// Get the file system directory.
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$file_system = file_directory_path();
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foreach ($directories as $directory) {
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$full_path = isset($full_path) ? $full_path . '/' . $directory : $directory;
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// Don't check directories outside the file system path.
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if (strpos($full_path, $file_system) === 0) {
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field_file_check_directory($full_path, FILE_CREATE_DIRECTORY);
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}
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}
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// Create the thumbnail.
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if ($info['width'] <= $size[0] && $info['height'] <= $size[1]) {
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file_copy($source, $destination);
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}
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elseif (image_get_toolkit() && @image_scale($source, $destination, $size[0], $size[1])) {
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// Set permissions. This is done for us when using file_copy().
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@chmod($destination, 0664);
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}
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else {
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drupal_set_message(t('An image thumbnail was not able to be created.'), 'error');
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}
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}
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