479 lines
16 KiB
PHP
479 lines
16 KiB
PHP
<?php
|
|
|
|
// functions for media display
|
|
|
|
// scale down the default size of an image so it's a better fit for the editor and theme
|
|
function image_constrain_size_for_editor($width, $height, $size = 'medium') {
|
|
|
|
if ( is_array($size) ) {
|
|
$max_width = $size[0];
|
|
$max_height = $size[1];
|
|
}
|
|
elseif ( $size == 'thumb' || $size == 'thumbnail' ) {
|
|
$max_width = intval(get_option('thumbnail_size_w'));
|
|
$max_height = intval(get_option('thumbnail_size_h'));
|
|
// last chance thumbnail size defaults
|
|
if ( !$max_width && !$max_height ) {
|
|
$max_width = 128;
|
|
$max_height = 96;
|
|
}
|
|
}
|
|
elseif ( $size == 'medium' ) {
|
|
$max_width = intval(get_option('medium_size_w'));
|
|
$max_height = intval(get_option('medium_size_h'));
|
|
// if no width is set, default to the theme content width if available
|
|
}
|
|
else { // $size == 'full'
|
|
// we're inserting a full size image into the editor. if it's a really big image we'll scale it down to fit reasonably
|
|
// within the editor itself, and within the theme's content width if it's known. the user can resize it in the editor
|
|
// if they wish.
|
|
if ( !empty($GLOBALS['content_width']) ) {
|
|
$max_width = $GLOBALS['content_width'];
|
|
}
|
|
else
|
|
$max_width = 500;
|
|
}
|
|
|
|
list( $max_width, $max_height ) = apply_filters( 'editor_max_image_size', array( $max_width, $max_height ), $size );
|
|
|
|
return wp_constrain_dimensions( $width, $height, $max_width, $max_height );
|
|
}
|
|
|
|
// return a width/height string for use in an <img /> tag. Empty values will be omitted.
|
|
function image_hwstring($width, $height) {
|
|
$out = '';
|
|
if ($width)
|
|
$out .= 'width="'.intval($width).'" ';
|
|
if ($height)
|
|
$out .= 'height="'.intval($height).'" ';
|
|
return $out;
|
|
}
|
|
|
|
// Scale an image to fit a particular size (such as 'thumb' or 'medium'), and return an image URL, height and width.
|
|
// The URL might be the original image, or it might be a resized version. This function won't create a new resized copy, it will just return an already resized one if it exists.
|
|
// returns an array($url, $width, $height)
|
|
function image_downsize($id, $size = 'medium') {
|
|
|
|
if ( !wp_attachment_is_image($id) )
|
|
return false;
|
|
|
|
$img_url = wp_get_attachment_url($id);
|
|
$meta = wp_get_attachment_metadata($id);
|
|
$width = $height = 0;
|
|
|
|
// plugins can use this to provide resize services
|
|
if ( $out = apply_filters('image_downsize', false, $id, $size) )
|
|
return $out;
|
|
|
|
// try for a new style intermediate size
|
|
if ( $intermediate = image_get_intermediate_size($id, $size) ) {
|
|
$img_url = str_replace(basename($img_url), $intermediate['file'], $img_url);
|
|
$width = $intermediate['width'];
|
|
$height = $intermediate['height'];
|
|
}
|
|
elseif ( $size == 'thumbnail' ) {
|
|
// fall back to the old thumbnail
|
|
if ( $thumb_file = wp_get_attachment_thumb_file() && $info = getimagesize($thumb_file) ) {
|
|
$img_url = str_replace(basename($img_url), basename($thumb_file), $img_url);
|
|
$width = $info[0];
|
|
$height = $info[1];
|
|
}
|
|
}
|
|
if ( !$width && !$height && isset($meta['width'], $meta['height']) ) {
|
|
// any other type: use the real image and constrain it
|
|
list( $width, $height ) = image_constrain_size_for_editor( $meta['width'], $meta['height'], $size );
|
|
}
|
|
|
|
if ( $img_url)
|
|
return array( $img_url, $width, $height );
|
|
return false;
|
|
|
|
}
|
|
|
|
// return an <img src /> tag for the given image attachment, scaling it down if requested
|
|
function get_image_tag($id, $alt, $title, $align, $size='medium') {
|
|
|
|
list( $img_src, $width, $height ) = image_downsize($id, $size);
|
|
$hwstring = image_hwstring($width, $height);
|
|
|
|
$html = '<img src="'.attribute_escape($img_src).'" alt="'.attribute_escape($alt).'" title="'.attribute_escape($title).'" '.$hwstring.'class="align'.attribute_escape($align).' size-'.attribute_escape($size).' wp-image-'.$id.'" />';
|
|
|
|
$html = apply_filters( 'image_send_to_editor', $html, $id, $alt, $title, $align, $url );
|
|
|
|
return $html;
|
|
}
|
|
|
|
// same as wp_shrink_dimensions, except the max parameters are optional.
|
|
// if either width or height are empty, no constraint is applied on that dimension.
|
|
function wp_constrain_dimensions( $current_width, $current_height, $max_width=0, $max_height=0 ) {
|
|
if ( !$max_width and !$max_height )
|
|
return array( $current_width, $current_height );
|
|
|
|
$width_ratio = $height_ratio = 1.0;
|
|
|
|
if ( $max_width > 0 && $current_width > $max_width )
|
|
$width_ratio = $max_width / $current_width;
|
|
|
|
if ( $max_height > 0 && $current_height > $max_height )
|
|
$height_ratio = $max_height / $current_height;
|
|
|
|
// the smaller ratio is the one we need to fit it to the constraining box
|
|
$ratio = min( $width_ratio, $height_ratio );
|
|
|
|
return array( intval($current_width * $ratio), intval($current_height * $ratio) );
|
|
}
|
|
|
|
// calculate dimensions and coordinates for a resized image that fits within a specified width and height
|
|
// if $crop is true, the largest matching central portion of the image will be cropped out and resized to the required size
|
|
function image_resize_dimensions($orig_w, $orig_h, $dest_w, $dest_h, $crop=false) {
|
|
|
|
if ($orig_w <= 0 || $orig_h <= 0)
|
|
return false;
|
|
// at least one of dest_w or dest_h must be specific
|
|
if ($dest_w <= 0 && $dest_h <= 0)
|
|
return false;
|
|
|
|
if ( $crop ) {
|
|
// crop the largest possible portion of the original image that we can size to $dest_w x $dest_h
|
|
$aspect_ratio = $orig_w / $orig_h;
|
|
$new_w = min($dest_w, $orig_w);
|
|
$new_h = min($dest_h, $orig_h);
|
|
if (!$new_w) {
|
|
$new_w = intval($new_h * $aspect_ratio);
|
|
}
|
|
if (!$new_h) {
|
|
$new_h = intval($new_w / $aspect_ratio);
|
|
}
|
|
|
|
$size_ratio = max($new_w / $orig_w, $new_h / $orig_h);
|
|
|
|
$crop_w = ceil($new_w / $size_ratio);
|
|
$crop_h = ceil($new_h / $size_ratio);
|
|
|
|
$s_x = floor(($orig_w - $crop_w)/2);
|
|
$s_y = floor(($orig_h - $crop_h)/2);
|
|
}
|
|
else {
|
|
// don't crop, just resize using $dest_w x $dest_h as a maximum bounding box
|
|
$crop_w = $orig_w;
|
|
$crop_h = $orig_h;
|
|
|
|
$s_x = 0;
|
|
$s_y = 0;
|
|
|
|
list( $new_w, $new_h ) = wp_constrain_dimensions( $orig_w, $orig_h, $dest_w, $dest_h );
|
|
}
|
|
|
|
// if the resulting image would be the same size or larger we don't want to resize it
|
|
if ($new_w >= $orig_w && $new_h >= $orig_h)
|
|
return false;
|
|
|
|
// the return array matches the parameters to imagecopyresampled()
|
|
// int dst_x, int dst_y, int src_x, int src_y, int dst_w, int dst_h, int src_w, int src_h
|
|
return array(0, 0, $s_x, $s_y, $new_w, $new_h, $crop_w, $crop_h);
|
|
|
|
}
|
|
|
|
// Scale down an image to fit a particular size and save a new copy of the image
|
|
function image_resize( $file, $max_w, $max_h, $crop=false, $suffix=null, $dest_path=null, $jpeg_quality=90) {
|
|
|
|
$image = wp_load_image( $file );
|
|
if ( !is_resource( $image ) )
|
|
return new WP_Error('error_loading_image', $image);
|
|
|
|
list($orig_w, $orig_h, $orig_type) = getimagesize( $file );
|
|
$dims = image_resize_dimensions($orig_w, $orig_h, $max_w, $max_h, $crop);
|
|
if (!$dims)
|
|
return $dims;
|
|
list($dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) = $dims;
|
|
|
|
$newimage = imagecreatetruecolor( $dst_w, $dst_h);
|
|
|
|
// preserve PNG transparency
|
|
if ( IMAGETYPE_PNG == $orig_type && function_exists( 'imagealphablending' ) && function_exists( 'imagesavealpha' ) ) {
|
|
imagealphablending( $newimage, false);
|
|
imagesavealpha( $newimage, true);
|
|
}
|
|
|
|
imagecopyresampled( $newimage, $image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);
|
|
|
|
// we don't need the original in memory anymore
|
|
imagedestroy( $image );
|
|
|
|
// $suffix will be appended to the destination filename, just before the extension
|
|
if ( !$suffix )
|
|
$suffix = "{$dst_w}x{$dst_h}";
|
|
|
|
$info = pathinfo($file);
|
|
$dir = $info['dirname'];
|
|
$ext = $info['extension'];
|
|
$name = basename($file, ".{$ext}");
|
|
if ( !is_null($dest_path) and $_dest_path = realpath($dest_path) )
|
|
$dir = $_dest_path;
|
|
$destfilename = "{$dir}/{$name}-{$suffix}.{$ext}";
|
|
|
|
if ( $orig_type == IMAGETYPE_GIF ) {
|
|
if (!imagegif( $newimage, $destfilename ) )
|
|
return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
|
|
}
|
|
elseif ( $orig_type == IMAGETYPE_PNG ) {
|
|
if (!imagepng( $newimage, $destfilename ) )
|
|
return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
|
|
}
|
|
else {
|
|
// all other formats are converted to jpg
|
|
$destfilename = "{$dir}/{$name}-{$suffix}.jpg";
|
|
if (!imagejpeg( $newimage, $destfilename, apply_filters( 'jpeg_quality', $jpeg_quality ) ) )
|
|
return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
|
|
}
|
|
|
|
imagedestroy( $newimage );
|
|
|
|
// Set correct file permissions
|
|
$stat = stat( dirname( $destfilename ));
|
|
$perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits
|
|
@ chmod( $destfilename, $perms );
|
|
|
|
return $destfilename;
|
|
}
|
|
|
|
// resize an image to make a thumbnail or intermediate size, and return metadata describing the new copy
|
|
// returns false if no image was created
|
|
function image_make_intermediate_size($file, $width, $height, $crop=false) {
|
|
if ( $width || $height ) {
|
|
$resized_file = image_resize($file, $width, $height, $crop);
|
|
if ( !is_wp_error($resized_file) && $resized_file && $info = getimagesize($resized_file) ) {
|
|
return array(
|
|
'file' => basename( $resized_file ),
|
|
'width' => $info[0],
|
|
'height' => $info[1],
|
|
);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
function image_get_intermediate_size($post_id, $size='thumbnail') {
|
|
if ( !$imagedata = wp_get_attachment_metadata( $post_id ) )
|
|
return false;
|
|
|
|
// get the best one for a specified set of dimensions
|
|
if ( is_array($size) && !empty($imagedata['sizes']) ) {
|
|
foreach ( $imagedata['sizes'] as $_size => $data ) {
|
|
// already cropped to width or height; so use this size
|
|
if ( ( $data['width'] == $size[0] && $data['height'] <= $size[1] ) || ( $data['height'] == $size[1] && $data['width'] <= $size[0] ) ) {
|
|
$file = $data['file'];
|
|
list($width, $height) = image_constrain_size_for_editor( $data['width'], $data['height'], $size );
|
|
return compact( 'file', 'width', 'height' );
|
|
}
|
|
// add to lookup table: area => size
|
|
$areas[$data['width'] * $data['height']] = $_size;
|
|
}
|
|
if ( !$size || !empty($areas) ) {
|
|
// find for the smallest image not smaller than the desired size
|
|
ksort($areas);
|
|
foreach ( $areas as $_size ) {
|
|
$data = $imagedata['sizes'][$_size];
|
|
if ( $data['width'] >= $size[0] || $data['height'] >= $size[1] ) {
|
|
$file = $data['file'];
|
|
list($width, $height) = image_constrain_size_for_editor( $data['width'], $data['height'], $size );
|
|
return compact( 'file', 'width', 'height' );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( is_array($size) || empty($size) || empty($imagedata['sizes'][$size]) )
|
|
return false;
|
|
|
|
$data = $imagedata['sizes'][$size];
|
|
// include the full filesystem path of the intermediate file
|
|
if ( empty($data['path']) && !empty($data['file']) ) {
|
|
$file_url = wp_get_attachment_url($post_id);
|
|
$data['path'] = path_join( dirname($imagedata['file']), $data['file'] );
|
|
$data['url'] = path_join( dirname($file_url), $data['file'] );
|
|
}
|
|
return $data;
|
|
}
|
|
|
|
// get an image to represent an attachment - a mime icon for files, thumbnail or intermediate size for images
|
|
// returns an array (url, width, height), or false if no image is available
|
|
function wp_get_attachment_image_src($attachment_id, $size='thumbnail', $icon = false) {
|
|
|
|
// get a thumbnail or intermediate image if there is one
|
|
if ( $image = image_downsize($attachment_id, $size) )
|
|
return $image;
|
|
|
|
if ( $icon && $src = wp_mime_type_icon($attachment_id) ) {
|
|
$icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/crystal' );
|
|
$src_file = $icon_dir . '/' . basename($src);
|
|
@list($width, $height) = getimagesize($src_file);
|
|
}
|
|
if ( $src && $width && $height )
|
|
return array( $src, $width, $height );
|
|
return false;
|
|
}
|
|
|
|
// as per wp_get_attachment_image_src, but returns an <img> tag
|
|
function wp_get_attachment_image($attachment_id, $size='thumbnail', $icon = false) {
|
|
|
|
$html = '';
|
|
$image = wp_get_attachment_image_src($attachment_id, $size, $icon);
|
|
if ( $image ) {
|
|
list($src, $width, $height) = $image;
|
|
$hwstring = image_hwstring($width, $height);
|
|
if ( is_array($size) )
|
|
$size = join('x', $size);
|
|
$html = '<img src="'.attribute_escape($src).'" '.$hwstring.'class="attachment-'.attribute_escape($size).'" alt="" />';
|
|
}
|
|
|
|
return $html;
|
|
}
|
|
|
|
add_shortcode('gallery', 'gallery_shortcode');
|
|
|
|
function gallery_shortcode($attr) {
|
|
global $post;
|
|
|
|
// Allow plugins/themes to override the default gallery template.
|
|
$output = apply_filters('post_gallery', '', $attr);
|
|
if ( $output != '' )
|
|
return $output;
|
|
|
|
// We're trusting author input, so let's at least make sure it looks like a valid orderby statement
|
|
if ( isset( $attr['orderby'] ) ) {
|
|
$attr['orderby'] = sanitize_sql_orderby( $attr['orderby'] );
|
|
if ( !$attr['orderby'] )
|
|
unset( $attr['orderby'] );
|
|
}
|
|
|
|
extract(shortcode_atts(array(
|
|
'orderby' => 'menu_order ASC, ID ASC',
|
|
'id' => $post->ID,
|
|
'itemtag' => 'dl',
|
|
'icontag' => 'dt',
|
|
'captiontag' => 'dd',
|
|
'columns' => 3,
|
|
'size' => 'thumbnail',
|
|
), $attr));
|
|
|
|
$id = intval($id);
|
|
$attachments = get_children("post_parent=$id&post_type=attachment&post_mime_type=image&orderby={$orderby}");
|
|
|
|
if ( empty($attachments) )
|
|
return '';
|
|
|
|
if ( is_feed() ) {
|
|
$output = "\n";
|
|
foreach ( $attachments as $id => $attachment )
|
|
$output .= wp_get_attachment_link($id, $size, true) . "\n";
|
|
return $output;
|
|
}
|
|
|
|
$listtag = tag_escape($listtag);
|
|
$itemtag = tag_escape($itemtag);
|
|
$captiontag = tag_escape($captiontag);
|
|
$columns = intval($columns);
|
|
$itemwidth = $columns > 0 ? floor(100/$columns) : 100;
|
|
|
|
$output = apply_filters('gallery_style', "
|
|
<style type='text/css'>
|
|
.gallery {
|
|
margin: auto;
|
|
}
|
|
.gallery-item {
|
|
float: left;
|
|
margin-top: 10px;
|
|
text-align: center;
|
|
width: {$itemwidth}%; }
|
|
.gallery img {
|
|
border: 2px solid #cfcfcf;
|
|
}
|
|
.gallery-caption {
|
|
margin-left: 0;
|
|
}
|
|
</style>
|
|
<!-- see gallery_shortcode() in wp-includes/media.php -->
|
|
<div class='gallery'>");
|
|
|
|
foreach ( $attachments as $id => $attachment ) {
|
|
$link = wp_get_attachment_link($id, $size, true);
|
|
$output .= "<{$itemtag} class='gallery-item'>";
|
|
$output .= "
|
|
<{$icontag} class='gallery-icon'>
|
|
$link
|
|
</{$icontag}>";
|
|
if ( $captiontag && trim($attachment->post_excerpt) ) {
|
|
$output .= "
|
|
<{$captiontag} class='gallery-caption'>
|
|
{$attachment->post_excerpt}
|
|
</{$captiontag}>";
|
|
}
|
|
$output .= "</{$itemtag}>";
|
|
if ( $columns > 0 && ++$i % $columns == 0 )
|
|
$output .= '<br style="clear: both" />';
|
|
}
|
|
|
|
$output .= "
|
|
<br style='clear: both;' />
|
|
</div>\n";
|
|
|
|
return $output;
|
|
}
|
|
|
|
function previous_image_link() {
|
|
adjacent_image_link(true);
|
|
}
|
|
|
|
function next_image_link() {
|
|
adjacent_image_link(false);
|
|
}
|
|
|
|
function adjacent_image_link($prev = true) {
|
|
global $post;
|
|
$post = get_post($post);
|
|
$attachments = array_values(get_children("post_parent=$post->post_parent&post_type=attachment&post_mime_type=image&orderby=menu_order ASC, ID ASC"));
|
|
|
|
foreach ( $attachments as $k => $attachment )
|
|
if ( $attachment->ID == $post->ID )
|
|
break;
|
|
|
|
$k = $prev ? $k - 1 : $k + 1;
|
|
|
|
if ( isset($attachments[$k]) )
|
|
echo wp_get_attachment_link($attachments[$k]->ID, 'thumbnail', true);
|
|
}
|
|
|
|
function get_attachment_taxonomies($attachment) {
|
|
if ( is_int( $attachment ) )
|
|
$attachment = get_post($attachment);
|
|
else if ( is_array($attachment) )
|
|
$attachment = (object) $attachment;
|
|
|
|
if ( ! is_object($attachment) )
|
|
return array();
|
|
|
|
$filename = basename($attachment->guid);
|
|
|
|
$objects = array('attachment');
|
|
|
|
if ( false !== strpos($filename, '.') )
|
|
$objects[] = 'attachment:' . substr($filename, strrpos($filename, '.') + 1);
|
|
if ( !empty($attachment->post_mime_type) ) {
|
|
$objects[] = 'attachment:' . $attachment->post_mime_type;
|
|
if ( false !== strpos($attachment->post_mime_type, '/') )
|
|
foreach ( explode('/', $attachment->post_mime_type) as $token )
|
|
if ( !empty($token) )
|
|
$objects[] = "attachment:$token";
|
|
}
|
|
|
|
$taxonomies = array();
|
|
foreach ( $objects as $object )
|
|
if ( $taxes = get_object_taxonomies($object) )
|
|
$taxonomies = array_merge($taxonomies, $taxes);
|
|
|
|
return array_unique($taxonomies);
|
|
}
|
|
|
|
?>
|