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<?php
/*
* FooGallery Thumbnail Resizing class
*/
if ( !class_exists( 'FooGallery_Thumbnails' ) ) {
class FooGallery_Thumbnails {
function __construct() {
add_filter( 'foogallery_attachment_resize_thumbnail', array( $this, 'resize' ), 10, 3 );
add_filter( 'foogallery_test_thumb_url', array( $this, 'override_test_thumb_url' ) );
add_filter( 'foogallery_thumbnail_resize_args', array( $this, 'check_for_force_original_thumb') );
}
function check_for_force_original_thumb( $args ){
global $current_foogallery;
if ( isset( $current_foogallery ) ) {
$args['force_use_original_thumb'] = $current_foogallery->force_use_original_thumbs;
}
return $args;
}
function resize( $original_image_src, $args, $thumbnail_object ) {
global $current_foogallery;
global $foogallery_last_generated_thumb_url;
$arg_defaults = array(
'width' => 0,
'height' => 0,
'crop' => true,
'jpeg_quality' => foogallery_thumbnail_jpeg_quality(),
'thumb_resize_animations' => true,
'foogallery_attachment_id'=> $thumbnail_object->ID
);
if ( isset( $current_foogallery ) ) {
$arg_defaults['foogallery_id'] = $current_foogallery->ID;
}
$args = wp_parse_args( $args, $arg_defaults );
//allow for plugins to change the thumbnail creation args
$args = apply_filters( 'foogallery_thumbnail_resize_args', $args, $original_image_src, $thumbnail_object );
//check the current arguments passed in by the shortcode
global $current_foogallery_arguments;
if ( isset( $current_foogallery_arguments ) && isset( $current_foogallery_arguments['template'] ) ) {
$thumbnail_args = apply_filters( 'foogallery_calculate_thumbnail_dimensions-' . $current_foogallery_arguments['template'], $args, $current_foogallery_arguments );
$args = wp_parse_args( $thumbnail_args, $args );
}
//allow for plugins to change the thumbnail creation args one final time
$args = apply_filters( 'foogallery_thumbnail_resize_args_final', $args, $original_image_src, $thumbnail_object );
$width = (int)$args['width'];
$height = (int)$args['height'];
$crop = (bool)$args['crop'];
if ( 0 === $width && 0 === $height ) {
return $original_image_src;
}
//we can force the use of the originally uploaded full-size image
$force_use_original_image = isset( $args['force_use_original_image'] ) && true === $args['force_use_original_image'];
if ( $thumbnail_object->ID > 0 && $force_use_original_image ) {
$fullsize = wp_get_attachment_image_src( $thumbnail_object->ID, 'fullsize' );
return $fullsize[0];
}
//we can force the use of the original WP icon or WP-generated thumb by passing through args individually
$force_use_original_thumb = isset( $args['force_use_original_thumb'] ) && true === $args['force_use_original_thumb'];
if ( $thumbnail_object->ID > 0 && $force_use_original_thumb ) {
$thumbnail_icon = wp_get_attachment_image_src( $thumbnail_object->ID, array( $width, $height ) );
return $thumbnail_icon[0];
}
//we can force the use of original WP thumbs by passing through args individually, or by saved settings
$use_original_thumbs = ( isset( $args['use_original_thumbs'] ) && true === $args['use_original_thumbs'] ) || 'on' === foogallery_get_setting( 'use_original_thumbs' );
if ( $use_original_thumbs ) {
$option_thumbnail_size_w = get_option( 'thumbnail_size_w' );
$option_thumbnail_size_h = get_option( 'thumbnail_size_h' );
$option_thumbnail_crop = get_option( 'thumbnail_crop' );
//check if we are trying to get back the default thumbnail that we already have
if ( $thumbnail_object->ID > 0 && $width == $option_thumbnail_size_w && $height == $option_thumbnail_size_h && $crop == $option_thumbnail_crop ) {
$thumbnail_attributes = wp_get_attachment_image_src( $thumbnail_object->ID );
return $thumbnail_attributes[0];
}
}
//remove invalid resize args
if ( array_key_exists( 'height', $args ) && 0 === $args['height'] ) {
unset( $args['height'] );
}
$force_resize = false;
//only worry about upscaling if we have supplied both a width and height for cropping
if ( array_key_exists( 'height', $args ) && $args['height'] > 0 &&
array_key_exists( 'width', $args ) && $args['width'] > 0 ) {
//check if we must upscale smaller images
if ( 'on' === foogallery_get_setting( 'thumb_resize_upscale_small' ) ) {
$force_resize = true;
$color = foogallery_get_setting( 'thumb_resize_upscale_small_color', '' );
if ( $color !== 'auto' && $color !== 'transparent' ) {
$colors = foogallery_rgb_to_color_array( $color );
$color = sprintf( "%03d%03d%03d000", $colors[0], $colors[1], $colors[2] );
}
$args['background_fill'] = $color;
}
}
//do some checks to see if the image is smaller
if ( $force_resize || $this->should_resize( $thumbnail_object, $args ) ) {
//save the generated thumb url to a global so that we can use it later if needed
$foogallery_last_generated_thumb_url = foogallery_thumb( $original_image_src, $args );
} else {
$foogallery_last_generated_thumb_url = apply_filters('foogallery_thumbnail_resize_small_image', $original_image_src, $args );
}
return $foogallery_last_generated_thumb_url;
}
function should_resize($thumbnail_object, $args) {
$original_width = $thumbnail_object->width;
$original_height = $thumbnail_object->height;
if ( $original_width === $original_height && $original_height === 0 ) {
//we do not have the original dimensions, so assume we must resize!
return true;
}
$new_width = isset( $args['width'] ) ? $args['width'] : 0;
$new_height = isset( $args['height'] ) ? $args['height'] : 0;
if ( $new_width > 0 && $new_height > 0 ) {
return $original_width > $new_width || $original_height > $new_height;
} else if ( $new_width > 0 ) {
return $original_width > $new_width;
}
return $original_height > $new_height;
}
function run_thumbnail_generation_tests() {
if ( !foogallery_thumb_active_engine()->requires_thumbnail_generation_tests() ) {
return array(
'success' => true
);
}
$test_image_url = foogallery_test_thumb_url();
//next, generate a thumbnail
$test_args = array(
'width' => 20,
'height' => 20,
'crop' => true,
'jpeg_quality' => foogallery_thumbnail_jpeg_quality()
);
//first, clear any previous cached files
$engine = foogallery_thumb_active_engine();
$engine->clear_local_cache_for_file( $test_image_url );
$generated_thumb = $engine->generate( $test_image_url, $test_args );
$success = $test_image_url !== $generated_thumb;
$file_info = wp_check_filetype( $test_image_url );
$test_results = array(
'success' => $success,
'thumb' => $generated_thumb,
'error' => $engine->get_last_error(),
'file_info' => $file_info
);
do_action( 'foogallery_thumbnail_generation_test', $test_results );
return $test_results;
}
function override_test_thumb_url( $test_thumb_url ) {
if ( 'on' !== foogallery_get_setting( 'override_thumb_test', false ) ) {
$image_url = $this->find_first_image_in_media_library();
if ( $image_url !== false ) {
return $image_url;
}
}
//if we get here, then either, we have set the override_thumb_test setting,
//or there are no good images to use from the media library
return $test_thumb_url;
}
static function find_first_image_in_media_library() {
//try the first 10 attachments from the media library
$args = array(
'post_type' => 'attachment',
'post_mime_type' => 'image',
'post_status' => 'any',
'numberposts' => 10,
'orderby' => 'date',
'order' => 'ASC'
);
$query_images = new WP_Query( $args );
foreach ( $query_images->posts as $image ) {
$image_url = wp_get_attachment_url( $image->ID );
if ( !empty( $image_url ) ) {
if ( self::image_file_exists( $image_url ) || self::image_file_exists( $image_url, true ) ) {
return $image_url;
}
}
}
return false;
}
/**
* Check if a remote image file exists.
*
* @param string $url The url to the remote image.
* @param bool $force_https Whether to force the url to be https.
*
* @return bool Whether the remote image exists.
*/
static function image_file_exists( $url, $force_https = false ) {
if ( $force_https ) {
$url = str_replace( 'http://', 'https://', $url );
}
$response = wp_remote_head( $url );
return 200 === wp_remote_retrieve_response_code( $response );
}
}
}