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<?php
/**
* WordPress API for media display.
*
* @package WordPress
* @subpackage Media
*/
/**
* Scale down the default size of an image.
*
* This is so that the image is a better fit for the editor and theme.
*
* The $size parameter accepts either an array or a string. The supported string
* values are 'thumb' or 'thumbnail' for the given thumbnail size or defaults at
* 128 width and 96 height in pixels. Also supported for the string value is
* 'medium' and 'full'. The 'full' isn't actually supported, but any value other
* than the supported will result in the content_width size or 500 if that is
* not set.
*
* Finally, there is a filter named 'editor_max_image_size', that will be called
* on the calculated array for width and height, respectively. The second
* parameter will be the value that was in the $size parameter. The returned
* type for the hook is an array with the width as the first element and the
* height as the second element.
*
* @since 2.5.0
* @uses wp_constrain_dimensions() This function passes the widths and the heights.
*
* @param int $width Width of the image
* @param int $height Height of the image
* @param string|array $size Size of what the result image should be.
* @param context Could be 'display' (like in a theme) or 'edit' (like inserting into an editor)
* @return array Width and height of what the result image should resize to.
*/
function image_constrain_size_for_editor($width, $height, $size = 'medium', $context = null ) {
global $content_width, $_wp_additional_image_sizes;
if ( ! $context )
$context = is_admin() ? 'edit' : 'display';
if ( is_array($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
}
elseif ( $size == 'large' ) {
// We're inserting a large 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.
$max_width = intval(get_option('large_size_w'));
$max_height = intval(get_option('large_size_h'));
if ( intval($content_width) > 0 )
$max_width = min( intval($content_width), $max_width );
} elseif ( isset( $_wp_additional_image_sizes ) && count( $_wp_additional_image_sizes ) && in_array( $size, array_keys( $_wp_additional_image_sizes ) ) ) {
$max_width = intval( $_wp_additional_image_sizes[$size]['width'] );
$max_height = intval( $_wp_additional_image_sizes[$size]['height'] );
if ( intval($content_width) > 0 && 'edit' == $context ) // Only in admin. Assume that theme authors know what they're doing.
$max_width = min( intval($content_width), $max_width );
}
// $size == 'full' has no constraint
else {
$max_width = $width;
$max_height = $height;
}
list( $max_width, $max_height ) = apply_filters( 'editor_max_image_size', array( $max_width, $max_height ), $size, $context );
return wp_constrain_dimensions( $width, $height, $max_width, $max_height );
}
/**
* Retrieve width and height attributes using given width and height values.
*
* Both attributes are required in the sense that both parameters must have a
* value, but are optional in that if you set them to false or null, then they
* will not be added to the returned string.
*
* You can set the value using a string, but it will only take numeric values.
* If you wish to put 'px' after the numbers, then it will be stripped out of
* the return.
*
* @since 2.5.0
*
* @param int|string $width Optional. Width attribute value.
* @param int|string $height Optional. Height attribute value.
* @return string HTML attributes for width and, or height.
*/
function image_hwstring($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').
*
* Array with image url, width, height, and whether is intermediate size, in
* that order is returned on success is returned. $is_intermediate is true if
* $url is a resized image, false if it is the original.
*
* 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.
*
* A plugin may use the 'image_downsize' filter to hook into and offer image
* resizing services for images. The hook must return an array with the same
* elements that are returned in the function. The first element being the URL
* to the new image that was resized.
*
* @since 2.5.0
* @uses apply_filters() Calls 'image_downsize' on $id and $size to provide
* resize services.
*
* @param int $id Attachment ID for image.
* @param array|string $size Optional, default is 'medium'. Size of image, either array or string.
* @return bool|array False on failure, array on success.
*/
function image_downsize($id, $size = 'medium') {
if ( !wp_attachment_is_image($id) )
return false;
// plugins can use this to provide resize services
if ( $out = apply_filters( 'image_downsize', false, $id, $size ) )
return $out;
$img_url = wp_get_attachment_url($id);
$meta = wp_get_attachment_metadata($id);
$width = $height = 0;
$is_intermediate = false;
$img_url_basename = wp_basename($img_url);
// try for a new style intermediate size
if ( $intermediate = image_get_intermediate_size($id, $size) ) {
$img_url = str_replace($img_url_basename, $intermediate['file'], $img_url);
$width = $intermediate['width'];
$height = $intermediate['height'];
$is_intermediate = true;
}
elseif ( $size == 'thumbnail' ) {
// fall back to the old thumbnail
if ( ($thumb_file = wp_get_attachment_thumb_file($id)) && $info = getimagesize($thumb_file) ) {
$img_url = str_replace($img_url_basename, wp_basename($thumb_file), $img_url);
$width = $info[0];
$height = $info[1];
$is_intermediate = true;
}
}
if ( !$width && !$height && isset( $meta['width'], $meta['height'] ) ) {
// any other type: use the real image
$width = $meta['width'];
$height = $meta['height'];
}
if ( $img_url) {
// we have the actual image size, but might need to further constrain it if content_width is narrower
list( $width, $height ) = image_constrain_size_for_editor( $width, $height, $size );
return array( $img_url, $width, $height, $is_intermediate );
}
return false;
}
/**
* Registers a new image size
*
* @since 2.9.0
*/
function add_image_size( $name, $width = 0, $height = 0, $crop = false ) {
global $_wp_additional_image_sizes;
$_wp_additional_image_sizes[$name] = array( 'width' => absint( $width ), 'height' => absint( $height ), 'crop' => (bool) $crop );
}
/**
* Registers an image size for the post thumbnail
*
* @since 2.9.0
*/
function set_post_thumbnail_size( $width = 0, $height = 0, $crop = false ) {
add_image_size( 'post-thumbnail', $width, $height, $crop );
}
/**
* An <img src /> tag for an image attachment, scaling it down if requested.
*
* The filter 'get_image_tag_class' allows for changing the class name for the
* image without having to use regular expressions on the HTML content. The
* parameters are: what WordPress will use for the class, the Attachment ID,
* image align value, and the size the image should be.
*
* The second filter 'get_image_tag' has the HTML content, which can then be
* further manipulated by a plugin to change all attribute values and even HTML
* content.
*
* @since 2.5.0
*
* @uses apply_filters() The 'get_image_tag_class' filter is the IMG element
* class attribute.
* @uses apply_filters() The 'get_image_tag' filter is the full IMG element with
* all attributes.
*
* @param int $id Attachment ID.
* @param string $alt Image Description for the alt attribute.
* @param string $title Image Description for the title attribute.
* @param string $align Part of the class name for aligning the image.
* @param string $size Optional. Default is 'medium'.
* @return string HTML IMG element for given image attachment
*/
function get_image_tag($id, $alt, $title, $align, $size='medium') {
list( $img_src, $width, $height ) = image_downsize($id, $size);
$hwstring = image_hwstring($width, $height);
$title = $title ? 'title="' . esc_attr( $title ) . '" ' : '';
$class = 'align' . esc_attr($align) .' size-' . esc_attr($size) . ' wp-image-' . $id;
$class = apply_filters('get_image_tag_class', $class, $id, $align, $size);
$html = '<img src="' . esc_attr($img_src) . '" alt="' . esc_attr($alt) . '" ' . $title . $hwstring . 'class="' . $class . '" />';
$html = apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size );
return $html;
}
/**
* Calculates the new dimensions for a downsampled image.
*
* If either width or height are empty, no constraint is applied on
* that dimension.
*
* @since 2.5.0
*
* @param int $current_width Current width of the image.
* @param int $current_height Current height of the image.
* @param int $max_width Optional. Maximum wanted width.
* @param int $max_height Optional. Maximum wanted height.
* @return array First item is the width, the second item is the height.
*/
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;
$did_width = $did_height = false;
if ( $max_width > 0 && $current_width > 0 && $current_width > $max_width ) {
$width_ratio = $max_width / $current_width;
$did_width = true;
}
if ( $max_height > 0 && $current_height > 0 && $current_height > $max_height ) {
$height_ratio = $max_height / $current_height;
$did_height = true;
}
// Calculate the larger/smaller ratios
$smaller_ratio = min( $width_ratio, $height_ratio );
$larger_ratio = max( $width_ratio, $height_ratio );
if ( intval( $current_width * $larger_ratio ) > $max_width || intval( $current_height * $larger_ratio ) > $max_height )
// The larger ratio is too big. It would result in an overflow.
$ratio = $smaller_ratio;
else
// The larger ratio fits, and is likely to be a more "snug" fit.
$ratio = $larger_ratio;
// Very small dimensions may result in 0, 1 should be the minimum.
$w = max ( 1, intval( $current_width * $ratio ) );
$h = max ( 1, intval( $current_height * $ratio ) );
// Sometimes, due to rounding, we'll end up with a result like this: 465x700 in a 177x177 box is 117x176... a pixel short
// We also have issues with recursive calls resulting in an ever-changing result. Constraining to the result of a constraint should yield the original result.
// Thus we look for dimensions that are one pixel shy of the max value and bump them up
if ( $did_width && $w == $max_width - 1 )
$w = $max_width; // Round it up
if ( $did_height && $h == $max_height - 1 )
$h = $max_height; // Round it up
return array( $w, $h );
}
/**
* Retrieve calculated resized dimensions for use in WP_Image_Editor.
*
* 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.
*
* @since 2.5.0
* @uses apply_filters() Calls 'image_resize_dimensions' on $orig_w, $orig_h, $dest_w, $dest_h and
* $crop to provide custom resize dimensions.
*
* @param int $orig_w Original width.
* @param int $orig_h Original height.
* @param int $dest_w New width.
* @param int $dest_h New height.
* @param bool $crop Optional, default is false. Whether to crop image or resize.
* @return bool|array False on failure. Returned array matches parameters for imagecopyresampled() PHP function.
*/
function image_resize_dimensions($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;
// plugins can use this to provide custom resize dimensions
$output = apply_filters( 'image_resize_dimensions', null, $orig_w, $orig_h, $dest_w, $dest_h, $crop );
if ( null !== $output )
return $output;
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);
$crop_w = round($new_w / $size_ratio);
$crop_h = round($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, (int) $s_x, (int) $s_y, (int) $new_w, (int) $new_h, (int) $crop_w, (int) $crop_h );
}
/**
* Resize an image to make a thumbnail or intermediate size.
*
* The returned array has the file size, the image width, and image height. The
* filter 'image_make_intermediate_size' can be used to hook in and change the
* values of the returned array. The only parameter is the resized file path.
*
* @since 2.5.0
*
* @param string $file File path.
* @param int $width Image width.
* @param int $height Image height.
* @param bool $crop Optional, default is false. Whether to crop image to specified height and width or resize.
* @return bool|array False, if no image was created. Metadata array on success.
*/
function image_make_intermediate_size( $file, $width, $height, $crop = false ) {
if ( $width || $height ) {
$editor = wp_get_image_editor( $file );
if ( is_wp_error( $editor ) || is_wp_error( $editor->resize( $width, $height, $crop ) ) )
return false;
$resized_file = $editor->save();
if ( ! is_wp_error( $resized_file ) && $resized_file ) {
unset( $resized_file['path'] );
return $resized_file;
}
}
return false;
}
/**
* Retrieve the image's intermediate size (resized) path, width, and height.
*
* The $size parameter can be an array with the width and height respectively.
* If the size matches the 'sizes' metadata array for width and height, then it
* will be used. If there is no direct match, then the nearest image size larger
* than the specified size will be used. If nothing is found, then the function
* will break out and return false.
*
* The metadata 'sizes' is used for compatible sizes that can be used for the
* parameter $size value.
*
* The url path will be given, when the $size parameter is a string.
*
* If you are passing an array for the $size, you should consider using
* add_image_size() so that a cropped version is generated. It's much more
* efficient than having to find the closest-sized image and then having the
* browser scale down the image.
*
* @since 2.5.0
* @see add_image_size()
*
* @param int $post_id Attachment ID for image.
* @param array|string $size Optional, default is 'thumbnail'. Size of image, either array or string.
* @return bool|array False on failure or array of file path, width, and height on success.
*/
function image_get_intermediate_size($post_id, $size='thumbnail') {
if ( !is_array( $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] ) {
// Skip images with unexpectedly divergent aspect ratios (crops)
// First, we calculate what size the original image would be if constrained to a box the size of the current image in the loop
$maybe_cropped = image_resize_dimensions($imagedata['width'], $imagedata['height'], $data['width'], $data['height'], false );
// If the size doesn't match within one pixel, then it is of a different aspect ratio, so we skip it, unless it's the thumbnail size
if ( 'thumbnail' != $_size && ( !$maybe_cropped || ( $maybe_cropped[4] != $data['width'] && $maybe_cropped[4] + 1 != $data['width'] ) || ( $maybe_cropped[5] != $data['height'] && $maybe_cropped[5] + 1 != $data['height'] ) ) )
continue;
// If we're still here, then we're going to use this size
$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 the available image sizes
* @since 3.0.0
* @return array Returns a filtered array of image size strings
*/
function get_intermediate_image_sizes() {
global $_wp_additional_image_sizes;
$image_sizes = array('thumbnail', 'medium', 'large'); // Standard sizes
if ( isset( $_wp_additional_image_sizes ) && count( $_wp_additional_image_sizes ) )
$image_sizes = array_merge( $image_sizes, array_keys( $_wp_additional_image_sizes ) );
return apply_filters( 'intermediate_image_sizes', $image_sizes );
}
/**
* Retrieve an image to represent an attachment.
*
* A mime icon for files, thumbnail or intermediate size for images.
*
* @since 2.5.0
*
* @param int $attachment_id Image attachment ID.
* @param string $size Optional, default is 'thumbnail'.
* @param bool $icon Optional, default is false. Whether it is an icon.
* @return bool|array Returns an array (url, width, height), or false, if no image is available.
*/
function wp_get_attachment_image_src($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;
$src = false;
if ( $icon && $src = wp_mime_type_icon($attachment_id) ) {
$icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/crystal' );
$src_file = $icon_dir . '/' . wp_basename($src);
@list($width, $height) = getimagesize($src_file);
}
if ( $src && $width && $height )
return array( $src, $width, $height );
return false;
}
/**
* Get an HTML img element representing an image attachment
*
* While $size will accept an array, it is better to register a size with
* add_image_size() so that a cropped version is generated. It's much more
* efficient than having to find the closest-sized image and then having the
* browser scale down the image.
*
* @see add_image_size()
* @uses apply_filters() Calls 'wp_get_attachment_image_attributes' hook on attributes array
* @uses wp_get_attachment_image_src() Gets attachment file URL and dimensions
* @since 2.5.0
*
* @param int $attachment_id Image attachment ID.
* @param string $size Optional, default is 'thumbnail'.
* @param bool $icon Optional, default is false. Whether it is an icon.
* @param mixed $attr Optional, attributes for the image markup.
* @return string HTML img element or empty string on failure.
*/
function wp_get_attachment_image($attachment_id, $size = 'thumbnail', $icon = false, $attr = '') {
$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);
$attachment = get_post($attachment_id);
$default_attr = array(
'src' => $src,
'class' => "attachment-$size",
'alt' => trim(strip_tags( get_post_meta($attachment_id, '_wp_attachment_image_alt', true) )), // Use Alt field first
);
if ( empty($default_attr['alt']) )
$default_attr['alt'] = trim(strip_tags( $attachment->post_excerpt )); // If not, Use the Caption
if ( empty($default_attr['alt']) )
$default_attr['alt'] = trim(strip_tags( $attachment->post_title )); // Finally, use the title
$attr = wp_parse_args($attr, $default_attr);
$attr = apply_filters( 'wp_get_attachment_image_attributes', $attr, $attachment );
$attr = array_map( 'esc_attr', $attr );
$html = rtrim("<img $hwstring");
foreach ( $attr as $name => $value ) {
$html .= " $name=" . '"' . $value . '"';
}
$html .= ' />';
}
return $html;
}
/**
* Adds a 'wp-post-image' class to post thumbnails
* Uses the begin_fetch_post_thumbnail_html and end_fetch_post_thumbnail_html action hooks to
* dynamically add/remove itself so as to only filter post thumbnails
*
* @since 2.9.0
* @param array $attr Attributes including src, class, alt, title
* @return array
*/
function _wp_post_thumbnail_class_filter( $attr ) {
$attr['class'] .= ' wp-post-image';
return $attr;
}
/**
* Adds _wp_post_thumbnail_class_filter to the wp_get_attachment_image_attributes filter
*
* @since 2.9.0
*/
function _wp_post_thumbnail_class_filter_add( $attr ) {
add_filter( 'wp_get_attachment_image_attributes', '_wp_post_thumbnail_class_filter' );
}
/**
* Removes _wp_post_thumbnail_class_filter from the wp_get_attachment_image_attributes filter
*
* @since 2.9.0
*/
function _wp_post_thumbnail_class_filter_remove( $attr ) {
remove_filter( 'wp_get_attachment_image_attributes', '_wp_post_thumbnail_class_filter' );
}
add_shortcode('wp_caption', 'img_caption_shortcode');
add_shortcode('caption', 'img_caption_shortcode');
/**
* The Caption shortcode.
*
* Allows a plugin to replace the content that would otherwise be returned. The
* filter is 'img_caption_shortcode' and passes an empty string, the attr
* parameter and the content parameter values.
*
* The supported attributes for the shortcode are 'id', 'align', 'width', and
* 'caption'.
*
* @since 2.6.0
*
* @param array $attr Attributes attributed to the shortcode.
* @param string $content Optional. Shortcode content.
* @return string
*/
function img_caption_shortcode($attr, $content = null) {
// New-style shortcode with the caption inside the shortcode with the link and image tags.
if ( ! isset( $attr['caption'] ) ) {
if ( preg_match( '#((?:<a [^>]+>\s*)?<img [^>]+>(?:\s*</a>)?)(.*)#is', $content, $matches ) ) {
$content = $matches[1];
$attr['caption'] = trim( $matches[2] );
}
}
// Allow plugins/themes to override the default caption template.
$output = apply_filters('img_caption_shortcode', '', $attr, $content);
if ( $output != '' )
return $output;
$atts = shortcode_atts( array(
'id' => '',
'align' => 'alignnone',
'width' => '',
'caption' => ''
), $attr, 'caption' );
$atts['width'] = (int) $atts['width'];
if ( $atts['width'] < 1 || empty( $atts['caption'] ) )
return $content;
if ( ! empty( $atts['id'] ) )
$atts['id'] = 'id="' . esc_attr( $atts['id'] ) . '" ';
$caption_width = 10 + $atts['width'];
/**
* Filter the width of an image's caption.
*
* By default, the caption is 10 pixels greater than the width of the image,
* to prevent post content from running up against a floated image.
*
* @since 3.7.0
*
* @param int $caption_width Width in pixels. To remove this inline style, return zero.
* @param array $atts {
* The attributes of the caption shortcode.
*
* @type string 'id' The ID of the div element for the caption.
* @type string 'align' The class name that aligns the caption. Default 'alignnone'.
* @type int 'width' The width of the image being captioned.
* @type string 'caption' The image's caption.
* }
* @param string $content The image element, possibly wrapped in a hyperlink.
*/
$caption_width = apply_filters( 'img_caption_shortcode_width', $caption_width, $atts, $content );
$style = '';
if ( $caption_width )
$style = 'style="width: ' . (int) $caption_width . 'px" ';
return '<div ' . $atts['id'] . $style . 'class="wp-caption ' . esc_attr( $atts['align'] ) . '">'
. do_shortcode( $content ) . '<p class="wp-caption-text">' . $atts['caption'] . '</p></div>';
}
add_shortcode('gallery', 'gallery_shortcode');
/**
* The Gallery shortcode.
*
* This implements the functionality of the Gallery Shortcode for displaying
* WordPress images on a post.
*
* @since 2.5.0
*
* @param array $attr Attributes of the shortcode.
* @return string HTML content to display gallery.
*/
function gallery_shortcode($attr) {
$post = get_post();
static $instance = 0;
$instance++;
if ( ! empty( $attr['ids'] ) ) {
// 'ids' is explicitly ordered, unless you specify otherwise.
if ( empty( $attr['orderby'] ) )
$attr['orderby'] = 'post__in';
$attr['include'] = $attr['ids'];
}
// 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(
'order' => 'ASC',
'orderby' => 'menu_order ID',
'id' => $post ? $post->ID : 0,
'itemtag' => 'dl',
'icontag' => 'dt',
'captiontag' => 'dd',
'columns' => 3,
'size' => 'thumbnail',
'include' => '',
'exclude' => '',
'link' => ''
), $attr, 'gallery'));
$id = intval($id);
if ( 'RAND' == $order )
$orderby = 'none';
if ( !empty($include) ) {
$_attachments = get_posts( array('include' => $include, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) );
$attachments = array();
foreach ( $_attachments as $key => $val ) {
$attachments[$val->ID] = $_attachments[$key];
}
} elseif ( !empty($exclude) ) {
$attachments = get_children( array('post_parent' => $id, 'exclude' => $exclude, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) );
} else {
$attachments = get_children( array('post_parent' => $id, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) );
}
if ( empty($attachments) )
return '';
if ( is_feed() ) {
$output = "\n";
foreach ( $attachments as $att_id => $attachment )
$output .= wp_get_attachment_link($att_id, $size, true) . "\n";
return $output;
}
$itemtag = tag_escape($itemtag);
$captiontag = tag_escape($captiontag);
$icontag = tag_escape($icontag);
$valid_tags = wp_kses_allowed_html( 'post' );
if ( ! isset( $valid_tags[ $itemtag ] ) )
$itemtag = 'dl';
if ( ! isset( $valid_tags[ $captiontag ] ) )
$captiontag = 'dd';
if ( ! isset( $valid_tags[ $icontag ] ) )
$icontag = 'dt';
$columns = intval($columns);
$itemwidth = $columns > 0 ? floor(100/$columns) : 100;
$float = is_rtl() ? 'right' : 'left';
$selector = "gallery-{$instance}";
$gallery_style = $gallery_div = '';
if ( apply_filters( 'use_default_gallery_style', true ) )
$gallery_style = "
<style type='text/css'>
#{$selector} {
margin: auto;
}
#{$selector} .gallery-item {
float: {$float};
margin-top: 10px;
text-align: center;
width: {$itemwidth}%;
}
#{$selector} img {
border: 2px solid #cfcfcf;
}
#{$selector} .gallery-caption {
margin-left: 0;
}
/* see gallery_shortcode() in wp-includes/media.php */
</style>";
$size_class = sanitize_html_class( $size );
$gallery_div = "<div id='$selector' class='gallery galleryid-{$id} gallery-columns-{$columns} gallery-size-{$size_class}'>";
$output = apply_filters( 'gallery_style', $gallery_style . "\n\t\t" . $gallery_div );
$i = 0;
foreach ( $attachments as $id => $attachment ) {
if ( ! empty( $link ) && 'file' === $link )
$image_output = wp_get_attachment_link( $id, $size, false, false );
elseif ( ! empty( $link ) && 'none' === $link )
$image_output = wp_get_attachment_image( $id, $size, false );
else
$image_output = wp_get_attachment_link( $id, $size, true, false );
$image_meta = wp_get_attachment_metadata( $id );
$orientation = '';
if ( isset( $image_meta['height'], $image_meta['width'] ) )
$orientation = ( $image_meta['height'] > $image_meta['width'] ) ? 'portrait' : 'landscape';
$output .= "<{$itemtag} class='gallery-item'>";
$output .= "
<{$icontag} class='gallery-icon {$orientation}'>
$image_output
</{$icontag}>";
if ( $captiontag && trim($attachment->post_excerpt) ) {
$output .= "
<{$captiontag} class='wp-caption-text gallery-caption'>
" . wptexturize($attachment->post_excerpt) . "
</{$captiontag}>";
}
$output .= "</{$itemtag}>";
if ( $columns > 0 && ++$i % $columns == 0 )
$output .= '<br style="clear: both" />';
}
$output .= "
<br style='clear: both;' />
</div>\n";
return $output;
}
/**
* Provide a No-JS Flash fallback as a last resort for audio / video
*
* @since 3.6.0
*
* @param string $url
* @return string Fallback HTML
*/
function wp_mediaelement_fallback( $url ) {
return apply_filters( 'wp_mediaelement_fallback', sprintf( '<a href="%1$s">%1$s</a>', esc_url( $url ) ), $url );
}
/**
* Return a filtered list of WP-supported audio formats
*
* @since 3.6.0
* @return array
*/
function wp_get_audio_extensions() {
return apply_filters( 'wp_audio_extensions', array( 'mp3', 'ogg', 'wma', 'm4a', 'wav' ) );
}
/**
* The Audio shortcode.
*
* This implements the functionality of the Audio Shortcode for displaying
* WordPress mp3s in a post.
*
* @since 3.6.0
*
* @param array $attr Attributes of the shortcode.
* @param string $content Optional. Shortcode content.
* @return string HTML content to display audio.
*/
function wp_audio_shortcode( $attr, $content = '' ) {
$post_id = get_post() ? get_the_ID() : 0;
static $instances = 0;
$instances++;
/**
* Override the default audio shortcode.
*
* @since 3.7.0
*
* @param null Empty variable to be replaced with shortcode markup.
* @param array $attr Attributes of the shortcode.
* @param string $content Shortcode content.
* @param int $instances Unique numeric ID of this audio shortcode instance.
*/
$html = apply_filters( 'wp_audio_shortcode_override', '', $attr, $content, $instances );
if ( '' !== $html )
return $html;
$audio = null;
$default_types = wp_get_audio_extensions();
$defaults_atts = array(
'src' => '',
'loop' => '',
'autoplay' => '',
'preload' => 'none'
);
foreach ( $default_types as $type )
$defaults_atts[$type] = '';
$atts = shortcode_atts( $defaults_atts, $attr, 'audio' );
extract( $atts );
$primary = false;
if ( ! empty( $src ) ) {
$type = wp_check_filetype( $src, wp_get_mime_types() );
if ( ! in_array( strtolower( $type['ext'] ), $default_types ) )
return sprintf( '<a class="wp-embedded-audio" href="%s">%s</a>', esc_url( $src ), esc_html( $src ) );
$primary = true;
array_unshift( $default_types, 'src' );
} else {
foreach ( $default_types as $ext ) {
if ( ! empty( $$ext ) ) {
$type = wp_check_filetype( $$ext, wp_get_mime_types() );
if ( strtolower( $type['ext'] ) === $ext )
$primary = true;
}
}
}
if ( ! $primary ) {
$audios = get_attached_media( 'audio', $post_id );
if ( empty( $audios ) )
return;
$audio = reset( $audios );
$src = wp_get_attachment_url( $audio->ID );
if ( empty( $src ) )
return;
array_unshift( $default_types, 'src' );
}
$library = apply_filters( 'wp_audio_shortcode_library', 'mediaelement' );
if ( 'mediaelement' === $library && did_action( 'init' ) ) {
wp_enqueue_style( 'wp-mediaelement' );
wp_enqueue_script( 'wp-mediaelement' );
}
$atts = array(
'class' => apply_filters( 'wp_audio_shortcode_class', 'wp-audio-shortcode' ),
'id' => sprintf( 'audio-%d-%d', $post_id, $instances ),
'loop' => $loop,
'autoplay' => $autoplay,
'preload' => $preload,
'style' => 'width: 100%',
);
// These ones should just be omitted altogether if they are blank
foreach ( array( 'loop', 'autoplay', 'preload' ) as $a ) {
if ( empty( $atts[$a] ) )
unset( $atts[$a] );
}
$attr_strings = array();
foreach ( $atts as $k => $v ) {
$attr_strings[] = $k . '="' . esc_attr( $v ) . '"';
}
$html = '';
if ( 'mediaelement' === $library && 1 === $instances )
$html .= "<!--[if lt IE 9]><script>document.createElement('audio');</script><![endif]-->\n";
$html .= sprintf( '<audio %s controls="controls">', join( ' ', $attr_strings ) );
$fileurl = '';
$source = '<source type="%s" src="%s" />';
foreach ( $default_types as $fallback ) {
if ( ! empty( $$fallback ) ) {
if ( empty( $fileurl ) )
$fileurl = $$fallback;
$type = wp_check_filetype( $$fallback, wp_get_mime_types() );
$html .= sprintf( $source, $type['type'], esc_url( $$fallback ) );
}
}
if ( 'mediaelement' === $library )
$html .= wp_mediaelement_fallback( $fileurl );
$html .= '</audio>';
return apply_filters( 'wp_audio_shortcode', $html, $atts, $audio, $post_id, $library );
}
add_shortcode( 'audio', 'wp_audio_shortcode' );
/**
* Return a filtered list of WP-supported video formats
*
* @since 3.6.0
* @return array
*/
function wp_get_video_extensions() {
return apply_filters( 'wp_video_extensions', array( 'mp4', 'm4v', 'webm', 'ogv', 'wmv', 'flv' ) );
}
/**
* The Video shortcode.
*
* This implements the functionality of the Video Shortcode for displaying
* WordPress mp4s in a post.
*
* @since 3.6.0
*
* @param array $attr Attributes of the shortcode.
* @param string $content Optional. Shortcode content.
* @return string HTML content to display video.
*/
function wp_video_shortcode( $attr, $content = '' ) {
global $content_width;
$post_id = get_post() ? get_the_ID() : 0;
static $instances = 0;
$instances++;
/**
* Override the default video shortcode.
*
* @since 3.7.0
*
* @param null Empty variable to be replaced with shortcode markup.
* @param array $attr Attributes of the shortcode.
* @param string $content Shortcode content.
* @param int $instances Unique numeric ID of this video shortcode instance.
*/
$html = apply_filters( 'wp_video_shortcode_override', '', $attr, $content, $instances );
if ( '' !== $html )
return $html;
$video = null;
$default_types = wp_get_video_extensions();
$defaults_atts = array(
'src' => '',
'poster' => '',
'loop' => '',
'autoplay' => '',
'preload' => 'metadata',
'height' => 360,
'width' => empty( $content_width ) ? 640 : $content_width,
);
foreach ( $default_types as $type )
$defaults_atts[$type] = '';
$atts = shortcode_atts( $defaults_atts, $attr, 'video' );
extract( $atts );
$w = $width;
$h = $height;
if ( is_admin() && $width > 600 )
$w = 600;
elseif ( ! is_admin() && $w > $defaults_atts['width'] )
$w = $defaults_atts['width'];
if ( $w < $width )
$height = round( ( $h * $w ) / $width );
$width = $w;
$primary = false;
if ( ! empty( $src ) ) {
$type = wp_check_filetype( $src, wp_get_mime_types() );
if ( ! in_array( strtolower( $type['ext'] ), $default_types ) )
return sprintf( '<a class="wp-embedded-video" href="%s">%s</a>', esc_url( $src ), esc_html( $src ) );
$primary = true;
array_unshift( $default_types, 'src' );
} else {
foreach ( $default_types as $ext ) {
if ( ! empty( $$ext ) ) {
$type = wp_check_filetype( $$ext, wp_get_mime_types() );
if ( strtolower( $type['ext'] ) === $ext )
$primary = true;
}
}
}
if ( ! $primary ) {
$videos = get_attached_media( 'video', $post_id );
if ( empty( $videos ) )
return;
$video = reset( $videos );
$src = wp_get_attachment_url( $video->ID );
if ( empty( $src ) )
return;
array_unshift( $default_types, 'src' );
}
$library = apply_filters( 'wp_video_shortcode_library', 'mediaelement' );
if ( 'mediaelement' === $library && did_action( 'init' ) ) {
wp_enqueue_style( 'wp-mediaelement' );
wp_enqueue_script( 'wp-mediaelement' );
}
$atts = array(
'class' => apply_filters( 'wp_video_shortcode_class', 'wp-video-shortcode' ),
'id' => sprintf( 'video-%d-%d', $post_id, $instances ),
'width' => absint( $width ),
'height' => absint( $height ),
'poster' => esc_url( $poster ),
'loop' => $loop,
'autoplay' => $autoplay,
'preload' => $preload,
);
// These ones should just be omitted altogether if they are blank
foreach ( array( 'poster', 'loop', 'autoplay', 'preload' ) as $a ) {
if ( empty( $atts[$a] ) )
unset( $atts[$a] );
}
$attr_strings = array();
foreach ( $atts as $k => $v ) {
$attr_strings[] = $k . '="' . esc_attr( $v ) . '"';
}
$html = '';
if ( 'mediaelement' === $library && 1 === $instances )
$html .= "<!--[if lt IE 9]><script>document.createElement('video');</script><![endif]-->\n";
$html .= sprintf( '<video %s controls="controls">', join( ' ', $attr_strings ) );
$fileurl = '';
$source = '<source type="%s" src="%s" />';
foreach ( $default_types as $fallback ) {
if ( ! empty( $$fallback ) ) {
if ( empty( $fileurl ) )
$fileurl = $$fallback;
$type = wp_check_filetype( $$fallback, wp_get_mime_types() );
// m4v sometimes shows up as video/mpeg which collides with mp4
if ( 'm4v' === $type['ext'] )
$type['type'] = 'video/m4v';
$html .= sprintf( $source, $type['type'], esc_url( $$fallback ) );
}
}
if ( 'mediaelement' === $library )
$html .= wp_mediaelement_fallback( $fileurl );
$html .= '</video>';
$html = sprintf( '<div style="width: %dpx; max-width: 100%%;" class="wp-video">%s</div>', $width, $html );
return apply_filters( 'wp_video_shortcode', $html, $atts, $video, $post_id, $library );
}
add_shortcode( 'video', 'wp_video_shortcode' );
/**
* Display previous image link that has the same post parent.
*
* @since 2.5.0
* @param string $size Optional, default is 'thumbnail'. Size of image, either array or string. 0 or 'none' will default to post_title or $text;
* @param string $text Optional, default is false. If included, link will reflect $text variable.
* @return string HTML content.
*/
function previous_image_link($size = 'thumbnail', $text = false) {
adjacent_image_link(true, $size, $text);
}
/**
* Display next image link that has the same post parent.
*
* @since 2.5.0
* @param string $size Optional, default is 'thumbnail'. Size of image, either array or string. 0 or 'none' will default to post_title or $text;
* @param string $text Optional, default is false. If included, link will reflect $text variable.
* @return string HTML content.
*/
function next_image_link($size = 'thumbnail', $text = false) {
adjacent_image_link(false, $size, $text);
}
/**
* Display next or previous image link that has the same post parent.
*
* Retrieves the current attachment object from the $post global.
*
* @since 2.5.0
*
* @param bool $prev Optional. Default is true to display previous link, false for next.
*/
function adjacent_image_link($prev = true, $size = 'thumbnail', $text = false) {
$post = get_post();
$attachments = array_values( get_children( array( 'post_parent' => $post->post_parent, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC', 'orderby' => 'menu_order ID' ) ) );
foreach ( $attachments as $k => $attachment )
if ( $attachment->ID == $post->ID )
break;
$k = $prev ? $k - 1 : $k + 1;
$output = $attachment_id = null;
if ( isset( $attachments[ $k ] ) ) {
$attachment_id = $attachments[ $k ]->ID;
$output = wp_get_attachment_link( $attachment_id, $size, true, false, $text );
}
$adjacent = $prev ? 'previous' : 'next';
echo apply_filters( "{$adjacent}_image_link", $output, $attachment_id, $size, $text );
}
/**
* Retrieve taxonomies attached to the attachment.
*
* @since 2.5.0
*
* @param int|array|object $attachment Attachment ID, Attachment data array, or Attachment data object.
* @return array Empty array on failure. List of taxonomies on success.
*/
function get_attachment_taxonomies($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);
}
/**
* Return all of the taxonomy names that are registered for attachments.
*
* Handles mime-type-specific taxonomies such as attachment:image and attachment:video.
*
* @since 3.5.0
* @see get_attachment_taxonomies()
* @uses get_taxonomies()
*
* @param string $output The type of output to return, either taxonomy 'names' or 'objects'. 'names' is the default.
* @return array The names of all taxonomy of $object_type.
*/
function get_taxonomies_for_attachments( $output = 'names' ) {
$taxonomies = array();
foreach ( get_taxonomies( array(), 'objects' ) as $taxonomy ) {
foreach ( $taxonomy->object_type as $object_type ) {
if ( 'attachment' == $object_type || 0 === strpos( $object_type, 'attachment:' ) ) {
if ( 'names' == $output )
$taxonomies[] = $taxonomy->name;
else
$taxonomies[ $taxonomy->name ] = $taxonomy;
break;
}
}
}
return $taxonomies;
}
/**
* Create new GD image resource with transparency support
* @TODO: Deprecate if possible.
*
* @since 2.9.0
*
* @param int $width Image width
* @param int $height Image height
* @return image resource
*/
function wp_imagecreatetruecolor($width, $height) {
$img = imagecreatetruecolor($width, $height);
if ( is_resource($img) && function_exists('imagealphablending') && function_exists('imagesavealpha') ) {
imagealphablending($img, false);
imagesavealpha($img, true);
}
return $img;
}
/**
* Register an embed handler. This function should probably only be used for sites that do not support oEmbed.
*
* @since 2.9.0
* @see WP_Embed::register_handler()
*/
function wp_embed_register_handler( $id, $regex, $callback, $priority = 10 ) {
global $wp_embed;
$wp_embed->register_handler( $id, $regex, $callback, $priority );
}
/**
* Unregister a previously registered embed handler.
*
* @since 2.9.0
* @see WP_Embed::unregister_handler()
*/
function wp_embed_unregister_handler( $id, $priority = 10 ) {
global $wp_embed;
$wp_embed->unregister_handler( $id, $priority );
}
/**
* Create default array of embed parameters.
*
* The width defaults to the content width as specified by the theme. If the
* theme does not specify a content width, then 500px is used.
*
* The default height is 1.5 times the width, or 1000px, whichever is smaller.
*
* The 'embed_defaults' filter can be used to adjust either of these values.
*
* @since 2.9.0
*
* @return array Default embed parameters.
*/
function wp_embed_defaults() {
if ( ! empty( $GLOBALS['content_width'] ) )
$width = (int) $GLOBALS['content_width'];
if ( empty( $width ) )
$width = 500;
$height = min( ceil( $width * 1.5 ), 1000 );
return apply_filters( 'embed_defaults', compact( 'width', 'height' ) );
}
/**
* Based on a supplied width/height example, return the biggest possible dimensions based on the max width/height.
*
* @since 2.9.0
* @uses wp_constrain_dimensions() This function passes the widths and the heights.
*
* @param int $example_width The width of an example embed.
* @param int $example_height The height of an example embed.
* @param int $max_width The maximum allowed width.
* @param int $max_height The maximum allowed height.
* @return array The maximum possible width and height based on the example ratio.
*/
function wp_expand_dimensions( $example_width, $example_height, $max_width, $max_height ) {
$example_width = (int) $example_width;
$example_height = (int) $example_height;
$max_width = (int) $max_width;
$max_height = (int) $max_height;
return wp_constrain_dimensions( $example_width * 1000000, $example_height * 1000000, $max_width, $max_height );
}
/**
* Attempts to fetch the embed HTML for a provided URL using oEmbed.
*
* @since 2.9.0
* @see WP_oEmbed
*
* @uses _wp_oembed_get_object()
* @uses WP_oEmbed::get_html()
*
* @param string $url The URL that should be embedded.
* @param array $args Additional arguments and parameters.
* @return bool|string False on failure or the embed HTML on success.
*/
function wp_oembed_get( $url, $args = '' ) {
require_once( ABSPATH . WPINC . '/class-oembed.php' );
$oembed = _wp_oembed_get_object();
return $oembed->get_html( $url, $args );
}
/**
* Adds a URL format and oEmbed provider URL pair.
*
* @since 2.9.0
* @see WP_oEmbed
*
* @uses _wp_oembed_get_object()
*
* @param string $format The format of URL that this provider can handle. You can use asterisks as wildcards.
* @param string $provider The URL to the oEmbed provider.
* @param boolean $regex Whether the $format parameter is in a regex format.
*/
function wp_oembed_add_provider( $format, $provider, $regex = false ) {
require_once( ABSPATH . WPINC . '/class-oembed.php' );
$oembed = _wp_oembed_get_object();
$oembed->providers[$format] = array( $provider, $regex );
}
/**
* Removes an oEmbed provider.
*
* @since 3.5.0
* @see WP_oEmbed
*
* @uses _wp_oembed_get_object()
*
* @param string $format The URL format for the oEmbed provider to remove.
*/
function wp_oembed_remove_provider( $format ) {
require_once( ABSPATH . WPINC . '/class-oembed.php' );
$oembed = _wp_oembed_get_object();
if ( isset( $oembed->providers[ $format ] ) ) {
unset( $oembed->providers[ $format ] );
return true;
}
return false;
}
/**
* Determines if default embed handlers should be loaded.
*
* Checks to make sure that the embeds library hasn't already been loaded. If
* it hasn't, then it will load the embeds library.
*
* @since 2.9.0
*/
function wp_maybe_load_embeds() {
if ( ! apply_filters( 'load_default_embeds', true ) )
return;
wp_embed_register_handler( 'googlevideo', '#http://video\.google\.([A-Za-z.]{2,5})/videoplay\?docid=([\d-]+)(.*?)#i', 'wp_embed_handler_googlevideo' );
wp_embed_register_handler( 'audio', '#^https?://.+?\.(' . join( '|', wp_get_audio_extensions() ) . ')$#i', apply_filters( 'wp_audio_embed_handler', 'wp_embed_handler_audio' ), 9999 );
wp_embed_register_handler( 'video', '#^https?://.+?\.(' . join( '|', wp_get_video_extensions() ) . ')$#i', apply_filters( 'wp_video_embed_handler', 'wp_embed_handler_video' ), 9999 );
}
/**
* The Google Video embed handler callback. Google Video does not support oEmbed.
*
* @see WP_Embed::register_handler()
* @see WP_Embed::shortcode()
*
* @param array $matches The regex matches from the provided regex when calling {@link wp_embed_register_handler()}.
* @param array $attr Embed attributes.
* @param string $url The original URL that was matched by the regex.
* @param array $rawattr The original unmodified attributes.
* @return string The embed HTML.
*/
function wp_embed_handler_googlevideo( $matches, $attr, $url, $rawattr ) {
// If the user supplied a fixed width AND height, use it
if ( !empty($rawattr['width']) && !empty($rawattr['height']) ) {
$width = (int) $rawattr['width'];
$height = (int) $rawattr['height'];
} else {
list( $width, $height ) = wp_expand_dimensions( 425, 344, $attr['width'], $attr['height'] );
}
return apply_filters( 'embed_googlevideo', '<embed type="application/x-shockwave-flash" src="http://video.google.com/googleplayer.swf?docid=' . esc_attr($matches[2]) . '&hl=en&fs=true" style="width:' . esc_attr($width) . 'px;height:' . esc_attr($height) . 'px" allowFullScreen="true" allowScriptAccess="always" />', $matches, $attr, $url, $rawattr );
}
/**
* Audio embed handler callback.
*
* @since 3.6.0
*
* @param array $matches The regex matches from the provided regex when calling {@link wp_embed_register_handler()}.
* @param array $attr Embed attributes.
* @param string $url The original URL that was matched by the regex.
* @param array $rawattr The original unmodified attributes.
* @return string The embed HTML.
*/
function wp_embed_handler_audio( $matches, $attr, $url, $rawattr ) {
$audio = sprintf( '[audio src="%s" /]', esc_url( $url ) );
return apply_filters( 'wp_embed_handler_audio', $audio, $attr, $url, $rawattr );
}
/**
* Video embed handler callback.
*
* @since 3.6.0
*
* @param array $matches The regex matches from the provided regex when calling {@link wp_embed_register_handler()}.
* @param array $attr Embed attributes.
* @param string $url The original URL that was matched by the regex.
* @param array $rawattr The original unmodified attributes.
* @return string The embed HTML.
*/
function wp_embed_handler_video( $matches, $attr, $url, $rawattr ) {
$dimensions = '';
if ( ! empty( $rawattr['width'] ) && ! empty( $rawattr['height'] ) ) {
$dimensions .= sprintf( 'width="%d" ', (int) $rawattr['width'] );
$dimensions .= sprintf( 'height="%d" ', (int) $rawattr['height'] );
}
$video = sprintf( '[video %s src="%s" /]', $dimensions, esc_url( $url ) );
return apply_filters( 'wp_embed_handler_video', $video, $attr, $url, $rawattr );
}
/**
* Converts a shorthand byte value to an integer byte value.
*
* @since 2.3.0
*
* @param string $size A shorthand byte value.
* @return int An integer byte value.
*/
function wp_convert_hr_to_bytes( $size ) {
$size = strtolower( $size );
$bytes = (int) $size;
if ( strpos( $size, 'k' ) !== false )
$bytes = intval( $size ) * 1024;
elseif ( strpos( $size, 'm' ) !== false )
$bytes = intval($size) * 1024 * 1024;
elseif ( strpos( $size, 'g' ) !== false )
$bytes = intval( $size ) * 1024 * 1024 * 1024;
return $bytes;
}
/**
* Determine the maximum upload size allowed in php.ini.
*
* @since 2.5.0
*
* @return int Allowed upload size.
*/
function wp_max_upload_size() {
$u_bytes = wp_convert_hr_to_bytes( ini_get( 'upload_max_filesize' ) );
$p_bytes = wp_convert_hr_to_bytes( ini_get( 'post_max_size' ) );
$bytes = apply_filters( 'upload_size_limit', min( $u_bytes, $p_bytes ), $u_bytes, $p_bytes );
return $bytes;
}
/**
* Returns a WP_Image_Editor instance and loads file into it.
*
* @since 3.5.0
* @access public
*
* @param string $path Path to file to load
* @param array $args Additional data. Accepts { 'mime_type'=>string, 'methods'=>{string, string, ...} }
* @return WP_Image_Editor|WP_Error
*/
function wp_get_image_editor( $path, $args = array() ) {
$args['path'] = $path;
if ( ! isset( $args['mime_type'] ) ) {
$file_info = wp_check_filetype( $args['path'] );
// If $file_info['type'] is false, then we let the editor attempt to
// figure out the file type, rather than forcing a failure based on extension.
if ( isset( $file_info ) && $file_info['type'] )
$args['mime_type'] = $file_info['type'];
}
$implementation = _wp_image_editor_choose( $args );
if ( $implementation ) {
$editor = new $implementation( $path );
$loaded = $editor->load();
if ( is_wp_error( $loaded ) )
return $loaded;
return $editor;
}
return new WP_Error( 'image_no_editor', __('No editor could be selected.') );
}
/**
* Tests whether there is an editor that supports a given mime type or methods.
*
* @since 3.5.0
* @access public
*
* @param string|array $args Array of requirements. Accepts { 'mime_type'=>string, 'methods'=>{string, string, ...} }
* @return boolean true if an eligible editor is found; false otherwise
*/
function wp_image_editor_supports( $args = array() ) {
return (bool) _wp_image_editor_choose( $args );
}
/**
* Tests which editors are capable of supporting the request.
*
* @since 3.5.0
* @access private
*
* @param array $args Additional data. Accepts { 'mime_type'=>string, 'methods'=>{string, string, ...} }
* @return string|bool Class name for the first editor that claims to support the request. False if no editor claims to support the request.
*/
function _wp_image_editor_choose( $args = array() ) {
require_once ABSPATH . WPINC . '/class-wp-image-editor.php';
require_once ABSPATH . WPINC . '/class-wp-image-editor-gd.php';
require_once ABSPATH . WPINC . '/class-wp-image-editor-imagick.php';
$implementations = apply_filters( 'wp_image_editors',
array( 'WP_Image_Editor_Imagick', 'WP_Image_Editor_GD' ) );
foreach ( $implementations as $implementation ) {
if ( ! call_user_func( array( $implementation, 'test' ), $args ) )
continue;
if ( isset( $args['mime_type'] ) &&
! call_user_func(
array( $implementation, 'supports_mime_type' ),
$args['mime_type'] ) ) {
continue;
}
if ( isset( $args['methods'] ) &&
array_diff( $args['methods'], get_class_methods( $implementation ) ) ) {
continue;
}
return $implementation;
}
return false;
}
/**
* Prints default plupload arguments.
*
* @since 3.4.0
*/
function wp_plupload_default_settings() {
global $wp_scripts;
$data = $wp_scripts->get_data( 'wp-plupload', 'data' );
if ( $data && false !== strpos( $data, '_wpPluploadSettings' ) )
return;
$max_upload_size = wp_max_upload_size();
$defaults = array(
'runtimes' => 'html5,silverlight,flash,html4',
'file_data_name' => 'async-upload', // key passed to $_FILE.
'multiple_queues' => true,
'max_file_size' => $max_upload_size . 'b',
'url' => admin_url( 'async-upload.php', 'relative' ),
'flash_swf_url' => includes_url( 'js/plupload/plupload.flash.swf' ),
'silverlight_xap_url' => includes_url( 'js/plupload/plupload.silverlight.xap' ),
'filters' => array( array( 'title' => __( 'Allowed Files' ), 'extensions' => '*') ),
'multipart' => true,
'urlstream_upload' => true,
);
// Multi-file uploading doesn't currently work in iOS Safari,
// single-file allows the built-in camera to be used as source for images
if ( wp_is_mobile() )
$defaults['multi_selection'] = false;
$defaults = apply_filters( 'plupload_default_settings', $defaults );
$params = array(
'action' => 'upload-attachment',
);
$params = apply_filters( 'plupload_default_params', $params );
$params['_wpnonce'] = wp_create_nonce( 'media-form' );
$defaults['multipart_params'] = $params;
$settings = array(
'defaults' => $defaults,
'browser' => array(
'mobile' => wp_is_mobile(),
'supported' => _device_can_upload(),
),
'limitExceeded' => is_multisite() && ! is_upload_space_available()
);
$script = 'var _wpPluploadSettings = ' . json_encode( $settings ) . ';';
if ( $data )
$script = "$data\n$script";
$wp_scripts->add_data( 'wp-plupload', 'data', $script );
}
add_action( 'customize_controls_enqueue_scripts', 'wp_plupload_default_settings' );
/**
* Prepares an attachment post object for JS, where it is expected
* to be JSON-encoded and fit into an Attachment model.
*
* @since 3.5.0
*
* @param mixed $attachment Attachment ID or object.
* @return array Array of attachment details.
*/
function wp_prepare_attachment_for_js( $attachment ) {
if ( ! $attachment = get_post( $attachment ) )
return;
if ( 'attachment' != $attachment->post_type )
return;
$meta = wp_get_attachment_metadata( $attachment->ID );
if ( false !== strpos( $attachment->post_mime_type, '/' ) )
list( $type, $subtype ) = explode( '/', $attachment->post_mime_type );
else
list( $type, $subtype ) = array( $attachment->post_mime_type, '' );
$attachment_url = wp_get_attachment_url( $attachment->ID );
$response = array(
'id' => $attachment->ID,
'title' => $attachment->post_title,
'filename' => wp_basename( $attachment->guid ),
'url' => $attachment_url,
'link' => get_attachment_link( $attachment->ID ),
'alt' => get_post_meta( $attachment->ID, '_wp_attachment_image_alt', true ),
'author' => $attachment->post_author,
'description' => $attachment->post_content,
'caption' => $attachment->post_excerpt,
'name' => $attachment->post_name,
'status' => $attachment->post_status,
'uploadedTo' => $attachment->post_parent,
'date' => strtotime( $attachment->post_date_gmt ) * 1000,
'modified' => strtotime( $attachment->post_modified_gmt ) * 1000,
'menuOrder' => $attachment->menu_order,
'mime' => $attachment->post_mime_type,
'type' => $type,
'subtype' => $subtype,
'icon' => wp_mime_type_icon( $attachment->ID ),
'dateFormatted' => mysql2date( get_option('date_format'), $attachment->post_date ),
'nonces' => array(
'update' => false,
'delete' => false,
),
'editLink' => false,
);
if ( current_user_can( 'edit_post', $attachment->ID ) ) {
$response['nonces']['update'] = wp_create_nonce( 'update-post_' . $attachment->ID );
$response['editLink'] = get_edit_post_link( $attachment->ID, 'raw' );
}
if ( current_user_can( 'delete_post', $attachment->ID ) )
$response['nonces']['delete'] = wp_create_nonce( 'delete-post_' . $attachment->ID );
if ( $meta && 'image' === $type ) {
$sizes = array();
/** This filter is documented in wp-admin/includes/media.php */
$possible_sizes = apply_filters( 'image_size_names_choose', array(
'thumbnail' => __('Thumbnail'),
'medium' => __('Medium'),
'large' => __('Large'),
'full' => __('Full Size'),
) );
unset( $possible_sizes['full'] );
// Loop through all potential sizes that may be chosen. Try to do this with some efficiency.
// First: run the image_downsize filter. If it returns something, we can use its data.
// If the filter does not return something, then image_downsize() is just an expensive
// way to check the image metadata, which we do second.
foreach ( $possible_sizes as $size => $label ) {
if ( $downsize = apply_filters( 'image_downsize', false, $attachment->ID, $size ) ) {
if ( ! $downsize[3] )
continue;
$sizes[ $size ] = array(
'height' => $downsize[2],
'width' => $downsize[1],
'url' => $downsize[0],
'orientation' => $downsize[2] > $downsize[1] ? 'portrait' : 'landscape',
);
} elseif ( isset( $meta['sizes'][ $size ] ) ) {
if ( ! isset( $base_url ) )
$base_url = str_replace( wp_basename( $attachment_url ), '', $attachment_url );
// Nothing from the filter, so consult image metadata if we have it.
$size_meta = $meta['sizes'][ $size ];
// We have the actual image size, but might need to further constrain it if content_width is narrower.
// Thumbnail, medium, and full sizes are also checked against the site's height/width options.
list( $width, $height ) = image_constrain_size_for_editor( $size_meta['width'], $size_meta['height'], $size, 'edit' );
$sizes[ $size ] = array(
'height' => $height,
'width' => $width,
'url' => $base_url . $size_meta['file'],
'orientation' => $height > $width ? 'portrait' : 'landscape',
);
}
}
$sizes['full'] = array( 'url' => $attachment_url );
if ( isset( $meta['height'], $meta['width'] ) ) {
$sizes['full']['height'] = $meta['height'];
$sizes['full']['width'] = $meta['width'];
$sizes['full']['orientation'] = $meta['height'] > $meta['width'] ? 'portrait' : 'landscape';
}
$response = array_merge( $response, array( 'sizes' => $sizes ), $sizes['full'] );
} elseif ( $meta && 'video' === $type ) {
if ( isset( $meta['width'] ) )
$response['width'] = (int) $meta['width'];
if ( isset( $meta['height'] ) )
$response['height'] = (int) $meta['height'];
}
if ( $meta && ( 'audio' === $type || 'video' === $type ) ) {
if ( isset( $meta['length_formatted'] ) )
$response['fileLength'] = $meta['length_formatted'];
}
if ( function_exists('get_compat_media_markup') )
$response['compat'] = get_compat_media_markup( $attachment->ID, array( 'in_modal' => true ) );
return apply_filters( 'wp_prepare_attachment_for_js', $response, $attachment, $meta );
}
/**
* Enqueues all scripts, styles, settings, and templates necessary to use
* all media JS APIs.
*
* @since 3.5.0
*/
function wp_enqueue_media( $args = array() ) {
// Enqueue me just once per page, please.
if ( did_action( 'wp_enqueue_media' ) )
return;
$defaults = array(
'post' => null,
);
$args = wp_parse_args( $args, $defaults );
// We're going to pass the old thickbox media tabs to `media_upload_tabs`
// to ensure plugins will work. We will then unset those tabs.
$tabs = array(
// handler action suffix => tab label
'type' => '',
'type_url' => '',
'gallery' => '',
'library' => '',
);
$tabs = apply_filters( 'media_upload_tabs', $tabs );
unset( $tabs['type'], $tabs['type_url'], $tabs['gallery'], $tabs['library'] );
$props = array(
'link' => get_option( 'image_default_link_type' ), // db default is 'file'
'align' => get_option( 'image_default_align' ), // empty default
'size' => get_option( 'image_default_size' ), // empty default
);
$settings = array(
'tabs' => $tabs,
'tabUrl' => add_query_arg( array( 'chromeless' => true ), admin_url('media-upload.php') ),
'mimeTypes' => wp_list_pluck( get_post_mime_types(), 0 ),
'captions' => ! apply_filters( 'disable_captions', '' ),
'nonce' => array(
'sendToEditor' => wp_create_nonce( 'media-send-to-editor' ),
),
'post' => array(
'id' => 0,
),
'defaultProps' => $props,
'embedExts' => array_merge( wp_get_audio_extensions(), wp_get_video_extensions() ),
);
$post = null;
if ( isset( $args['post'] ) ) {
$post = get_post( $args['post'] );
$settings['post'] = array(
'id' => $post->ID,
'nonce' => wp_create_nonce( 'update-post_' . $post->ID ),
);
if ( current_theme_supports( 'post-thumbnails', $post->post_type ) && post_type_supports( $post->post_type, 'thumbnail' ) ) {
$featured_image_id = get_post_meta( $post->ID, '_thumbnail_id', true );
$settings['post']['featuredImageId'] = $featured_image_id ? $featured_image_id : -1;
}
}
$hier = $post && is_post_type_hierarchical( $post->post_type );
$strings = array(
// Generic
'url' => __( 'URL' ),
'addMedia' => __( 'Add Media' ),
'search' => __( 'Search' ),
'select' => __( 'Select' ),
'cancel' => __( 'Cancel' ),
/* translators: This is a would-be plural string used in the media manager.
If there is not a word you can use in your language to avoid issues with the
lack of plural support here, turn it into "selected: %d" then translate it.
*/
'selected' => __( '%d selected' ),
'dragInfo' => __( 'Drag and drop to reorder images.' ),
// Upload
'uploadFilesTitle' => __( 'Upload Files' ),
'uploadImagesTitle' => __( 'Upload Images' ),
// Library
'mediaLibraryTitle' => __( 'Media Library' ),
'insertMediaTitle' => __( 'Insert Media' ),
'createNewGallery' => __( 'Create a new gallery' ),
'returnToLibrary' => __( '← Return to library' ),
'allMediaItems' => __( 'All media items' ),
'noItemsFound' => __( 'No items found.' ),
'insertIntoPost' => $hier ? __( 'Insert into page' ) : __( 'Insert into post' ),
'uploadedToThisPost' => $hier ? __( 'Uploaded to this page' ) : __( 'Uploaded to this post' ),
'warnDelete' => __( "You are about to permanently delete this item.\n 'Cancel' to stop, 'OK' to delete." ),
// From URL
'insertFromUrlTitle' => __( 'Insert from URL' ),
// Featured Images
'setFeaturedImageTitle' => __( 'Set Featured Image' ),
'setFeaturedImage' => __( 'Set featured image' ),
// Gallery
'createGalleryTitle' => __( 'Create Gallery' ),
'editGalleryTitle' => __( 'Edit Gallery' ),
'cancelGalleryTitle' => __( '← Cancel Gallery' ),
'insertGallery' => __( 'Insert gallery' ),
'updateGallery' => __( 'Update gallery' ),
'addToGallery' => __( 'Add to gallery' ),
'addToGalleryTitle' => __( 'Add to Gallery' ),
'reverseOrder' => __( 'Reverse order' ),
);
$settings = apply_filters( 'media_view_settings', $settings, $post );
$strings = apply_filters( 'media_view_strings', $strings, $post );
$strings['settings'] = $settings;
wp_localize_script( 'media-views', '_wpMediaViewsL10n', $strings );
wp_enqueue_script( 'media-editor' );
wp_enqueue_style( 'media-views' );
wp_plupload_default_settings();
require_once ABSPATH . WPINC . '/media-template.php';
add_action( 'admin_footer', 'wp_print_media_templates' );
add_action( 'wp_footer', 'wp_print_media_templates' );
add_action( 'customize_controls_print_footer_scripts', 'wp_print_media_templates' );
do_action( 'wp_enqueue_media' );
}
/**
* Retrieve media attached to the passed post
*
* @since 3.6.0
*
* @param string $type (Mime) type of media desired
* @param mixed $post Post ID or object
* @return array Found attachments
*/
function get_attached_media( $type, $post = 0 ) {
if ( ! $post = get_post( $post ) )
return array();
$args = array(
'post_parent' => $post->ID,
'post_type' => 'attachment',
'post_mime_type' => $type,
'posts_per_page' => -1,
'orderby' => 'menu_order',
'order' => 'ASC',
);
$args = apply_filters( 'get_attached_media_args', $args, $type, $post );
$children = get_children( $args );
return (array) apply_filters( 'get_attached_media', $children, $type, $post );
}
/**
* Check the content blob for an <audio>, <video> <object>, <embed>, or <iframe>
*
* @since 3.6.0
*
* @param string $content A string which might contain media data.
* @param array $types array of media types: 'audio', 'video', 'object', 'embed', or 'iframe'
* @return array A list of found HTML media embeds
*/
function get_media_embedded_in_content( $content, $types = null ) {
$html = array();
$allowed_media_types = array( 'audio', 'video', 'object', 'embed', 'iframe' );
if ( ! empty( $types ) ) {
if ( ! is_array( $types ) )
$types = array( $types );
$allowed_media_types = array_intersect( $allowed_media_types, $types );
}
foreach ( $allowed_media_types as $tag ) {
if ( preg_match( '#' . get_tag_regex( $tag ) . '#', $content, $matches ) ) {
$html[] = $matches[0];
}
}
return $html;
}
/**
* Retrieve galleries from the passed post's content
*
* @since 3.6.0
*
* @param mixed $post Optional. Post ID or object.
* @param boolean $html Whether to return HTML or data in the array
* @return array A list of arrays, each containing gallery data and srcs parsed
* from the expanded shortcode
*/
function get_post_galleries( $post, $html = true ) {
if ( ! $post = get_post( $post ) )
return array();
if ( ! has_shortcode( $post->post_content, 'gallery' ) )
return array();
$galleries = array();
if ( preg_match_all( '/' . get_shortcode_regex() . '/s', $post->post_content, $matches, PREG_SET_ORDER ) ) {
foreach ( $matches as $shortcode ) {
if ( 'gallery' === $shortcode[2] ) {
$srcs = array();
$count = 1;
$gallery = do_shortcode_tag( $shortcode );
if ( $html ) {
$galleries[] = $gallery;
} else {
preg_match_all( '#src=([\'"])(.+?)\1#is', $gallery, $src, PREG_SET_ORDER );
if ( ! empty( $src ) ) {
foreach ( $src as $s )
$srcs[] = $s[2];
}
$data = shortcode_parse_atts( $shortcode[3] );
$data['src'] = array_values( array_unique( $srcs ) );
$galleries[] = $data;
}
}
}
}
return apply_filters( 'get_post_galleries', $galleries, $post );
}
/**
* Check a specified post's content for gallery and, if present, return the first
*
* @since 3.6.0
*
* @param mixed $post Optional. Post ID or object.
* @param boolean $html Whether to return HTML or data
* @return string|array Gallery data and srcs parsed from the expanded shortcode
*/
function get_post_gallery( $post = 0, $html = true ) {
$galleries = get_post_galleries( $post, $html );
$gallery = reset( $galleries );
return apply_filters( 'get_post_gallery', $gallery, $post, $galleries );
}
/**
* Retrieve the image srcs from galleries from a post's content, if present
*
* @since 3.6.0
*
* @param mixed $post Optional. Post ID or object.
* @return array A list of lists, each containing image srcs parsed
* from an expanded shortcode
*/
function get_post_galleries_images( $post = 0 ) {
$galleries = get_post_galleries( $post, false );
return wp_list_pluck( $galleries, 'src' );
}
/**
* Check a post's content for galleries and return the image srcs for the first found gallery
*
* @since 3.6.0
*
* @param mixed $post Optional. Post ID or object.
* @return array A list of a gallery's image srcs in order
*/
function get_post_gallery_images( $post = 0 ) {
$gallery = get_post_gallery( $post, false );
return empty( $gallery['src'] ) ? array() : $gallery['src'];
}
