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4e09dfc8fb
git-svn-id: http://svn.automattic.com/wordpress/trunk@17631 1a063a9b-81f0-0310-95a4-ce76da25c4cd
1401 lines
48 KiB
PHP
1401 lines
48 KiB
PHP
<?php
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/**
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* WordPress API for media display.
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*
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* @package WordPress
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*/
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/**
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* Scale down the default size of an image.
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*
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* This is so that the image is a better fit for the editor and theme.
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*
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* The $size parameter accepts either an array or a string. The supported string
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* values are 'thumb' or 'thumbnail' for the given thumbnail size or defaults at
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* 128 width and 96 height in pixels. Also supported for the string value is
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* 'medium' and 'full'. The 'full' isn't actually supported, but any value other
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* than the supported will result in the content_width size or 500 if that is
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* not set.
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*
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* Finally, there is a filter named, 'editor_max_image_size' that will be called
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* on the calculated array for width and height, respectively. The second
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* parameter will be the value that was in the $size parameter. The returned
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* type for the hook is an array with the width as the first element and the
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* height as the second element.
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*
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* @since 2.5.0
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* @uses wp_constrain_dimensions() This function passes the widths and the heights.
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*
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* @param int $width Width of the image
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* @param int $height Height of the image
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* @param string|array $size Size of what the result image should be.
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* @return array Width and height of what the result image should resize to.
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*/
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function image_constrain_size_for_editor($width, $height, $size = 'medium') {
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global $content_width, $_wp_additional_image_sizes;
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if ( is_array($size) ) {
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$max_width = $size[0];
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$max_height = $size[1];
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}
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elseif ( $size == 'thumb' || $size == 'thumbnail' ) {
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$max_width = intval(get_option('thumbnail_size_w'));
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$max_height = intval(get_option('thumbnail_size_h'));
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// last chance thumbnail size defaults
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if ( !$max_width && !$max_height ) {
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$max_width = 128;
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$max_height = 96;
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}
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}
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elseif ( $size == 'medium' ) {
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$max_width = intval(get_option('medium_size_w'));
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$max_height = intval(get_option('medium_size_h'));
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// if no width is set, default to the theme content width if available
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}
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elseif ( $size == 'large' ) {
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// we're inserting a large size image into the editor. if it's a really
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// big image we'll scale it down to fit reasonably within the editor
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// itself, and within the theme's content width if it's known. the user
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// can resize it in the editor if they wish.
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$max_width = intval(get_option('large_size_w'));
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$max_height = intval(get_option('large_size_h'));
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if ( intval($content_width) > 0 )
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$max_width = min( intval($content_width), $max_width );
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} elseif ( isset( $_wp_additional_image_sizes ) && count( $_wp_additional_image_sizes ) && in_array( $size, array_keys( $_wp_additional_image_sizes ) ) ) {
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$max_width = intval( $_wp_additional_image_sizes[$size]['width'] );
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$max_height = intval( $_wp_additional_image_sizes[$size]['height'] );
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if ( intval($content_width) > 0 && is_admin() ) // Only in admin. Assume that theme authors know what they're doing.
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$max_width = min( intval($content_width), $max_width );
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}
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// $size == 'full' has no constraint
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else {
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$max_width = $width;
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$max_height = $height;
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}
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list( $max_width, $max_height ) = apply_filters( 'editor_max_image_size', array( $max_width, $max_height ), $size );
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return wp_constrain_dimensions( $width, $height, $max_width, $max_height );
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}
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/**
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* Retrieve width and height attributes using given width and height values.
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*
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* Both attributes are required in the sense that both parameters must have a
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* value, but are optional in that if you set them to false or null, then they
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* will not be added to the returned string.
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*
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* You can set the value using a string, but it will only take numeric values.
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* If you wish to put 'px' after the numbers, then it will be stripped out of
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* the return.
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*
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* @since 2.5.0
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*
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* @param int|string $width Optional. Width attribute value.
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* @param int|string $height Optional. Height attribute value.
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* @return string HTML attributes for width and, or height.
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*/
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function image_hwstring($width, $height) {
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$out = '';
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if ($width)
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$out .= 'width="'.intval($width).'" ';
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if ($height)
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$out .= 'height="'.intval($height).'" ';
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return $out;
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}
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/**
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* Scale an image to fit a particular size (such as 'thumb' or 'medium').
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*
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* Array with image url, width, height, and whether is intermediate size, in
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* that order is returned on success is returned. $is_intermediate is true if
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* $url is a resized image, false if it is the original.
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*
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* The URL might be the original image, or it might be a resized version. This
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* function won't create a new resized copy, it will just return an already
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* resized one if it exists.
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*
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* A plugin may use the 'image_downsize' filter to hook into and offer image
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* resizing services for images. The hook must return an array with the same
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* elements that are returned in the function. The first element being the URL
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* to the new image that was resized.
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*
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* @since 2.5.0
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* @uses apply_filters() Calls 'image_downsize' on $id and $size to provide
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* resize services.
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*
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* @param int $id Attachment ID for image.
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* @param array|string $size Optional, default is 'medium'. Size of image, either array or string.
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* @return bool|array False on failure, array on success.
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*/
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function image_downsize($id, $size = 'medium') {
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if ( !wp_attachment_is_image($id) )
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return false;
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$img_url = wp_get_attachment_url($id);
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$meta = wp_get_attachment_metadata($id);
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$width = $height = 0;
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$is_intermediate = false;
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$img_url_basename = wp_basename($img_url);
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// plugins can use this to provide resize services
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if ( $out = apply_filters('image_downsize', false, $id, $size) )
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return $out;
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// try for a new style intermediate size
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if ( $intermediate = image_get_intermediate_size($id, $size) ) {
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$img_url = str_replace($img_url_basename, $intermediate['file'], $img_url);
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$width = $intermediate['width'];
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$height = $intermediate['height'];
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$is_intermediate = true;
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}
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elseif ( $size == 'thumbnail' ) {
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// fall back to the old thumbnail
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if ( ($thumb_file = wp_get_attachment_thumb_file($id)) && $info = getimagesize($thumb_file) ) {
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$img_url = str_replace($img_url_basename, wp_basename($thumb_file), $img_url);
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$width = $info[0];
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$height = $info[1];
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$is_intermediate = true;
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}
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}
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if ( !$width && !$height && isset($meta['width'], $meta['height']) ) {
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// any other type: use the real image
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$width = $meta['width'];
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$height = $meta['height'];
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}
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if ( $img_url) {
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// we have the actual image size, but might need to further constrain it if content_width is narrower
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list( $width, $height ) = image_constrain_size_for_editor( $width, $height, $size );
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return array( $img_url, $width, $height, $is_intermediate );
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}
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return false;
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}
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/**
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* Registers a new image size
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*/
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function add_image_size( $name, $width = 0, $height = 0, $crop = false ) {
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global $_wp_additional_image_sizes;
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$_wp_additional_image_sizes[$name] = array( 'width' => absint( $width ), 'height' => absint( $height ), 'crop' => (bool) $crop );
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}
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/**
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* Registers an image size for the post thumbnail
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*/
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function set_post_thumbnail_size( $width = 0, $height = 0, $crop = false ) {
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add_image_size( 'post-thumbnail', $width, $height, $crop );
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}
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/**
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* An <img src /> tag for an image attachment, scaling it down if requested.
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*
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* The filter 'get_image_tag_class' allows for changing the class name for the
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* image without having to use regular expressions on the HTML content. The
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* parameters are: what WordPress will use for the class, the Attachment ID,
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* image align value, and the size the image should be.
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*
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* The second filter 'get_image_tag' has the HTML content, which can then be
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* further manipulated by a plugin to change all attribute values and even HTML
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* content.
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*
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* @since 2.5.0
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*
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* @uses apply_filters() The 'get_image_tag_class' filter is the IMG element
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* class attribute.
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* @uses apply_filters() The 'get_image_tag' filter is the full IMG element with
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* all attributes.
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*
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* @param int $id Attachment ID.
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* @param string $alt Image Description for the alt attribute.
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* @param string $title Image Description for the title attribute.
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* @param string $align Part of the class name for aligning the image.
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* @param string $size Optional. Default is 'medium'.
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* @return string HTML IMG element for given image attachment
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*/
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function get_image_tag($id, $alt, $title, $align, $size='medium') {
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list( $img_src, $width, $height ) = image_downsize($id, $size);
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$hwstring = image_hwstring($width, $height);
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$class = 'align' . esc_attr($align) .' size-' . esc_attr($size) . ' wp-image-' . $id;
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$class = apply_filters('get_image_tag_class', $class, $id, $align, $size);
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$html = '<img src="' . esc_attr($img_src) . '" alt="' . esc_attr($alt) . '" title="' . esc_attr($title).'" '.$hwstring.'class="'.$class.'" />';
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$html = apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size );
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return $html;
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}
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/**
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* Load an image from a string, if PHP supports it.
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*
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* @since 2.1.0
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*
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* @param string $file Filename of the image to load.
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* @return resource The resulting image resource on success, Error string on failure.
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*/
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function wp_load_image( $file ) {
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if ( is_numeric( $file ) )
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$file = get_attached_file( $file );
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if ( ! file_exists( $file ) )
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return sprintf(__('File “%s” doesn’t exist?'), $file);
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if ( ! function_exists('imagecreatefromstring') )
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return __('The GD image library is not installed.');
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// Set artificially high because GD uses uncompressed images in memory
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@ini_set('memory_limit', '256M');
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$image = imagecreatefromstring( file_get_contents( $file ) );
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if ( !is_resource( $image ) )
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return sprintf(__('File “%s” is not an image.'), $file);
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return $image;
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}
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/**
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* Calculates the new dimentions for a downsampled image.
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*
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* If either width or height are empty, no constraint is applied on
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* that dimension.
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*
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* @since 2.5.0
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*
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* @param int $current_width Current width of the image.
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* @param int $current_height Current height of the image.
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* @param int $max_width Optional. Maximum wanted width.
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* @param int $max_height Optional. Maximum wanted height.
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* @return array First item is the width, the second item is the height.
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*/
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function wp_constrain_dimensions( $current_width, $current_height, $max_width=0, $max_height=0 ) {
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if ( !$max_width and !$max_height )
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return array( $current_width, $current_height );
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$width_ratio = $height_ratio = 1.0;
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$did_width = $did_height = false;
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if ( $max_width > 0 && $current_width > 0 && $current_width > $max_width ) {
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$width_ratio = $max_width / $current_width;
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$did_width = true;
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}
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if ( $max_height > 0 && $current_height > 0 && $current_height > $max_height ) {
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$height_ratio = $max_height / $current_height;
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$did_height = true;
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}
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// Calculate the larger/smaller ratios
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$smaller_ratio = min( $width_ratio, $height_ratio );
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$larger_ratio = max( $width_ratio, $height_ratio );
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if ( intval( $current_width * $larger_ratio ) > $max_width || intval( $current_height * $larger_ratio ) > $max_height )
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// The larger ratio is too big. It would result in an overflow.
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$ratio = $smaller_ratio;
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else
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// The larger ratio fits, and is likely to be a more "snug" fit.
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$ratio = $larger_ratio;
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$w = intval( $current_width * $ratio );
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$h = intval( $current_height * $ratio );
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// Sometimes, due to rounding, we'll end up with a result like this: 465x700 in a 177x177 box is 117x176... a pixel short
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// We also have issues with recursive calls resulting in an ever-changing result. Contraining to the result of a constraint should yield the original result.
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// Thus we look for dimensions that are one pixel shy of the max value and bump them up
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if ( $did_width && $w == $max_width - 1 )
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$w = $max_width; // Round it up
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if ( $did_height && $h == $max_height - 1 )
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$h = $max_height; // Round it up
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return array( $w, $h );
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}
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/**
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* Retrieve calculated resized dimensions for use in imagecopyresampled().
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*
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* Calculate dimensions and coordinates for a resized image that fits within a
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* specified width and height. If $crop is true, the largest matching central
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* portion of the image will be cropped out and resized to the required size.
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*
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* @since 2.5.0
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*
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* @param int $orig_w Original width.
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* @param int $orig_h Original height.
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* @param int $dest_w New width.
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* @param int $dest_h New height.
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* @param bool $crop Optional, default is false. Whether to crop image or resize.
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* @return bool|array False, on failure. Returned array matches parameters for imagecopyresampled() PHP function.
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*/
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function image_resize_dimensions($orig_w, $orig_h, $dest_w, $dest_h, $crop = false) {
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if ($orig_w <= 0 || $orig_h <= 0)
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return false;
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// at least one of dest_w or dest_h must be specific
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if ($dest_w <= 0 && $dest_h <= 0)
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return false;
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if ( $crop ) {
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// crop the largest possible portion of the original image that we can size to $dest_w x $dest_h
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$aspect_ratio = $orig_w / $orig_h;
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$new_w = min($dest_w, $orig_w);
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$new_h = min($dest_h, $orig_h);
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if ( !$new_w ) {
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$new_w = intval($new_h * $aspect_ratio);
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}
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if ( !$new_h ) {
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$new_h = intval($new_w / $aspect_ratio);
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}
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$size_ratio = max($new_w / $orig_w, $new_h / $orig_h);
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$crop_w = round($new_w / $size_ratio);
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$crop_h = round($new_h / $size_ratio);
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$s_x = floor( ($orig_w - $crop_w) / 2 );
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$s_y = floor( ($orig_h - $crop_h) / 2 );
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} else {
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// don't crop, just resize using $dest_w x $dest_h as a maximum bounding box
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$crop_w = $orig_w;
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$crop_h = $orig_h;
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$s_x = 0;
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$s_y = 0;
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list( $new_w, $new_h ) = wp_constrain_dimensions( $orig_w, $orig_h, $dest_w, $dest_h );
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}
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// if the resulting image would be the same size or larger we don't want to resize it
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if ( $new_w >= $orig_w && $new_h >= $orig_h )
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return false;
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// the return array matches the parameters to imagecopyresampled()
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// int dst_x, int dst_y, int src_x, int src_y, int dst_w, int dst_h, int src_w, int src_h
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return array( 0, 0, (int) $s_x, (int) $s_y, (int) $new_w, (int) $new_h, (int) $crop_w, (int) $crop_h );
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}
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/**
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* Scale down an image to fit a particular size and save a new copy of the image.
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*
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* The PNG transparency will be preserved using the function, as well as the
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* image type. If the file going in is PNG, then the resized image is going to
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* be PNG. The only supported image types are PNG, GIF, and JPEG.
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*
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* Some functionality requires API to exist, so some PHP version may lose out
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* support. This is not the fault of WordPress (where functionality is
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* downgraded, not actual defects), but of your PHP version.
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*
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* @since 2.5.0
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*
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* @param string $file Image file path.
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* @param int $max_w Maximum width to resize to.
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* @param int $max_h Maximum height to resize to.
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* @param bool $crop Optional. Whether to crop image or resize.
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* @param string $suffix Optional. File Suffix.
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* @param string $dest_path Optional. New image file path.
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* @param int $jpeg_quality Optional, default is 90. Image quality percentage.
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* @return mixed WP_Error on failure. String with new destination path.
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*/
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function image_resize( $file, $max_w, $max_h, $crop = false, $suffix = null, $dest_path = null, $jpeg_quality = 90 ) {
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$image = wp_load_image( $file );
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if ( !is_resource( $image ) )
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return new WP_Error( 'error_loading_image', $image, $file );
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$size = @getimagesize( $file );
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if ( !$size )
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return new WP_Error('invalid_image', __('Could not read image size'), $file);
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list($orig_w, $orig_h, $orig_type) = $size;
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$dims = image_resize_dimensions($orig_w, $orig_h, $max_w, $max_h, $crop);
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if ( !$dims )
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return new WP_Error( 'error_getting_dimensions', __('Could not calculate resized image dimensions') );
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list($dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) = $dims;
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$newimage = wp_imagecreatetruecolor( $dst_w, $dst_h );
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imagecopyresampled( $newimage, $image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);
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// convert from full colors to index colors, like original PNG.
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if ( IMAGETYPE_PNG == $orig_type && function_exists('imageistruecolor') && !imageistruecolor( $image ) )
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imagetruecolortopalette( $newimage, false, imagecolorstotal( $image ) );
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// 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'];
|
|
$name = wp_basename($file, ".$ext");
|
|
|
|
if ( !is_null($dest_path) and $_dest_path = realpath($dest_path) )
|
|
$dir = $_dest_path;
|
|
$destfilename = "{$dir}/{$name}-{$suffix}.{$ext}";
|
|
|
|
if ( IMAGETYPE_GIF == $orig_type ) {
|
|
if ( !imagegif( $newimage, $destfilename ) )
|
|
return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
|
|
} elseif ( IMAGETYPE_PNG == $orig_type ) {
|
|
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, 'image_resize' ) ) )
|
|
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.
|
|
*
|
|
* 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 ) {
|
|
$resized_file = image_resize($file, $width, $height, $crop);
|
|
if ( !is_wp_error($resized_file) && $resized_file && $info = getimagesize($resized_file) ) {
|
|
$resized_file = apply_filters('image_make_intermediate_size', $resized_file);
|
|
return array(
|
|
'file' => wp_basename( $resized_file ),
|
|
'width' => $info[0],
|
|
'height' => $info[1],
|
|
);
|
|
}
|
|
}
|
|
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 $icon Optional, default is false. Whether it is an icon.
|
|
* @return string HTML img element or empty string on failure.
|
|
*/
|
|
function wp_get_attachment_image($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
|
|
'title' => trim(strip_tags( $attachment->post_title )),
|
|
);
|
|
if ( empty($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 thumbnail 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 thumbnail 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) {
|
|
|
|
// Allow plugins/themes to override the default caption template.
|
|
$output = apply_filters('img_caption_shortcode', '', $attr, $content);
|
|
if ( $output != '' )
|
|
return $output;
|
|
|
|
extract(shortcode_atts(array(
|
|
'id' => '',
|
|
'align' => 'alignnone',
|
|
'width' => '',
|
|
'caption' => ''
|
|
), $attr));
|
|
|
|
if ( 1 > (int) $width || empty($caption) )
|
|
return $content;
|
|
|
|
if ( $id ) $id = 'id="' . esc_attr($id) . '" ';
|
|
|
|
return '<div ' . $id . 'class="wp-caption ' . esc_attr($align) . '" style="width: ' . (10 + (int) $width) . 'px">'
|
|
. do_shortcode( $content ) . '<p class="wp-caption-text">' . $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 $attr Attributes attributed to the shortcode.
|
|
* @return string HTML content to display gallery.
|
|
*/
|
|
function gallery_shortcode($attr) {
|
|
global $post, $wp_locale;
|
|
|
|
static $instance = 0;
|
|
$instance++;
|
|
|
|
// 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->ID,
|
|
'itemtag' => 'dl',
|
|
'icontag' => 'dt',
|
|
'captiontag' => 'dd',
|
|
'columns' => 3,
|
|
'size' => 'thumbnail',
|
|
'include' => '',
|
|
'exclude' => ''
|
|
), $attr));
|
|
|
|
$id = intval($id);
|
|
if ( 'RAND' == $order )
|
|
$orderby = 'none';
|
|
|
|
if ( !empty($include) ) {
|
|
$include = preg_replace( '/[^0-9,]+/', '', $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) ) {
|
|
$exclude = preg_replace( '/[^0-9,]+/', '', $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);
|
|
$columns = intval($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;
|
|
}
|
|
</style>
|
|
<!-- see gallery_shortcode() in wp-includes/media.php -->";
|
|
$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 ) {
|
|
$link = isset($attr['link']) && 'file' == $attr['link'] ? wp_get_attachment_link($id, $size, false, false) : wp_get_attachment_link($id, $size, true, false);
|
|
|
|
$output .= "<{$itemtag} class='gallery-item'>";
|
|
$output .= "
|
|
<{$icontag} class='gallery-icon'>
|
|
$link
|
|
</{$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;
|
|
}
|
|
|
|
/**
|
|
* 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 $prev Optional. Default is true to display previous link, true for next.
|
|
*/
|
|
function adjacent_image_link($prev = true, $size = 'thumbnail', $text = false) {
|
|
global $post;
|
|
$post = get_post($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 : $k + 1;
|
|
|
|
if ( isset($attachments[$k]) )
|
|
echo wp_get_attachment_link($attachments[$k]->ID, $size, true, false, $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);
|
|
}
|
|
|
|
/**
|
|
* Check if the installed version of GD supports particular image type
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @param string $mime_type
|
|
* @return bool
|
|
*/
|
|
function gd_edit_image_support($mime_type) {
|
|
if ( function_exists('imagetypes') ) {
|
|
switch( $mime_type ) {
|
|
case 'image/jpeg':
|
|
return (imagetypes() & IMG_JPG) != 0;
|
|
case 'image/png':
|
|
return (imagetypes() & IMG_PNG) != 0;
|
|
case 'image/gif':
|
|
return (imagetypes() & IMG_GIF) != 0;
|
|
}
|
|
} else {
|
|
switch( $mime_type ) {
|
|
case 'image/jpeg':
|
|
return function_exists('imagecreatefromjpeg');
|
|
case 'image/png':
|
|
return function_exists('imagecreatefrompng');
|
|
case 'image/gif':
|
|
return function_exists('imagecreatefromgif');
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Create new GD image resource with transparency support
|
|
*
|
|
* @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;
|
|
}
|
|
|
|
/**
|
|
* API for easily embedding rich media such as videos and images into content.
|
|
*
|
|
* @package WordPress
|
|
* @subpackage Embed
|
|
* @since 2.9.0
|
|
*/
|
|
class WP_Embed {
|
|
var $handlers = array();
|
|
var $post_ID;
|
|
var $usecache = true;
|
|
var $linkifunknown = true;
|
|
|
|
/**
|
|
* Constructor
|
|
*/
|
|
function __construct() {
|
|
// Hack to get the [embed] shortcode to run before wpautop()
|
|
add_filter( 'the_content', array(&$this, 'run_shortcode'), 8 );
|
|
|
|
// Shortcode placeholder for strip_shortcodes()
|
|
add_shortcode( 'embed', '__return_false' );
|
|
|
|
// Attempts to embed all URLs in a post
|
|
if ( get_option('embed_autourls') )
|
|
add_filter( 'the_content', array(&$this, 'autoembed'), 8 );
|
|
|
|
// After a post is saved, invalidate the oEmbed cache
|
|
add_action( 'save_post', array(&$this, 'delete_oembed_caches') );
|
|
|
|
// After a post is saved, cache oEmbed items via AJAX
|
|
add_action( 'edit_form_advanced', array(&$this, 'maybe_run_ajax_cache') );
|
|
}
|
|
|
|
/**
|
|
* Process the [embed] shortcode.
|
|
*
|
|
* Since the [embed] shortcode needs to be run earlier than other shortcodes,
|
|
* this function removes all existing shortcodes, registers the [embed] shortcode,
|
|
* calls {@link do_shortcode()}, and then re-registers the old shortcodes.
|
|
*
|
|
* @uses $shortcode_tags
|
|
* @uses remove_all_shortcodes()
|
|
* @uses add_shortcode()
|
|
* @uses do_shortcode()
|
|
*
|
|
* @param string $content Content to parse
|
|
* @return string Content with shortcode parsed
|
|
*/
|
|
function run_shortcode( $content ) {
|
|
global $shortcode_tags;
|
|
|
|
// Back up current registered shortcodes and clear them all out
|
|
$orig_shortcode_tags = $shortcode_tags;
|
|
remove_all_shortcodes();
|
|
|
|
add_shortcode( 'embed', array(&$this, 'shortcode') );
|
|
|
|
// Do the shortcode (only the [embed] one is registered)
|
|
$content = do_shortcode( $content );
|
|
|
|
// Put the original shortcodes back
|
|
$shortcode_tags = $orig_shortcode_tags;
|
|
|
|
return $content;
|
|
}
|
|
|
|
/**
|
|
* If a post/page was saved, then output Javascript to make
|
|
* an AJAX request that will call WP_Embed::cache_oembed().
|
|
*/
|
|
function maybe_run_ajax_cache() {
|
|
global $post_ID;
|
|
|
|
if ( empty($post_ID) || empty($_GET['message']) || 1 != $_GET['message'] )
|
|
return;
|
|
|
|
?>
|
|
<script type="text/javascript">
|
|
/* <![CDATA[ */
|
|
jQuery(document).ready(function($){
|
|
$.get("<?php echo admin_url( 'admin-ajax.php?action=oembed-cache&post=' . $post_ID ); ?>");
|
|
});
|
|
/* ]]> */
|
|
</script>
|
|
<?php
|
|
}
|
|
|
|
/**
|
|
* Register an embed handler. Do not use this function directly, use {@link wp_embed_register_handler()} instead.
|
|
* This function should probably also only be used for sites that do not support oEmbed.
|
|
*
|
|
* @param string $id An internal ID/name for the handler. Needs to be unique.
|
|
* @param string $regex The regex that will be used to see if this handler should be used for a URL.
|
|
* @param callback $callback The callback function that will be called if the regex is matched.
|
|
* @param int $priority Optional. Used to specify the order in which the registered handlers will be tested (default: 10). Lower numbers correspond with earlier testing, and handlers with the same priority are tested in the order in which they were added to the action.
|
|
*/
|
|
function register_handler( $id, $regex, $callback, $priority = 10 ) {
|
|
$this->handlers[$priority][$id] = array(
|
|
'regex' => $regex,
|
|
'callback' => $callback,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Unregister a previously registered embed handler. Do not use this function directly, use {@link wp_embed_unregister_handler()} instead.
|
|
*
|
|
* @param string $id The handler ID that should be removed.
|
|
* @param int $priority Optional. The priority of the handler to be removed (default: 10).
|
|
*/
|
|
function unregister_handler( $id, $priority = 10 ) {
|
|
if ( isset($this->handlers[$priority][$id]) )
|
|
unset($this->handlers[$priority][$id]);
|
|
}
|
|
|
|
/**
|
|
* The {@link do_shortcode()} callback function.
|
|
*
|
|
* Attempts to convert a URL into embed HTML. Starts by checking the URL against the regex of the registered embed handlers.
|
|
* If none of the regex matches and it's enabled, then the URL will be given to the {@link WP_oEmbed} class.
|
|
*
|
|
* @uses wp_oembed_get()
|
|
* @uses wp_parse_args()
|
|
* @uses wp_embed_defaults()
|
|
* @uses WP_Embed::maybe_make_link()
|
|
* @uses get_option()
|
|
* @uses current_user_can()
|
|
* @uses wp_cache_get()
|
|
* @uses wp_cache_set()
|
|
* @uses get_post_meta()
|
|
* @uses update_post_meta()
|
|
*
|
|
* @param array $attr Shortcode attributes.
|
|
* @param string $url The URL attempting to be embeded.
|
|
* @return string The embed HTML on success, otherwise the original URL.
|
|
*/
|
|
function shortcode( $attr, $url = '' ) {
|
|
global $post;
|
|
|
|
if ( empty($url) )
|
|
return '';
|
|
|
|
$rawattr = $attr;
|
|
$attr = wp_parse_args( $attr, wp_embed_defaults() );
|
|
|
|
// kses converts & into & and we need to undo this
|
|
// See http://core.trac.wordpress.org/ticket/11311
|
|
$url = str_replace( '&', '&', $url );
|
|
|
|
// Look for known internal handlers
|
|
ksort( $this->handlers );
|
|
foreach ( $this->handlers as $priority => $handlers ) {
|
|
foreach ( $handlers as $id => $handler ) {
|
|
if ( preg_match( $handler['regex'], $url, $matches ) && is_callable( $handler['callback'] ) ) {
|
|
if ( false !== $return = call_user_func( $handler['callback'], $matches, $attr, $url, $rawattr ) )
|
|
return apply_filters( 'embed_handler_html', $return, $url, $attr );
|
|
}
|
|
}
|
|
}
|
|
|
|
$post_ID = ( !empty($post->ID) ) ? $post->ID : null;
|
|
if ( !empty($this->post_ID) ) // Potentially set by WP_Embed::cache_oembed()
|
|
$post_ID = $this->post_ID;
|
|
|
|
// Unknown URL format. Let oEmbed have a go.
|
|
if ( $post_ID ) {
|
|
|
|
// Check for a cached result (stored in the post meta)
|
|
$cachekey = '_oembed_' . md5( $url . serialize( $attr ) );
|
|
if ( $this->usecache ) {
|
|
$cache = get_post_meta( $post_ID, $cachekey, true );
|
|
|
|
// Failures are cached
|
|
if ( '{{unknown}}' === $cache )
|
|
return $this->maybe_make_link( $url );
|
|
|
|
if ( !empty($cache) )
|
|
return apply_filters( 'embed_oembed_html', $cache, $url, $attr, $post_ID );
|
|
}
|
|
|
|
// Use oEmbed to get the HTML
|
|
$attr['discover'] = ( apply_filters('embed_oembed_discover', false) && author_can( $post_ID, 'unfiltered_html' ) );
|
|
$html = wp_oembed_get( $url, $attr );
|
|
|
|
// Cache the result
|
|
$cache = ( $html ) ? $html : '{{unknown}}';
|
|
update_post_meta( $post_ID, $cachekey, $cache );
|
|
|
|
// If there was a result, return it
|
|
if ( $html )
|
|
return apply_filters( 'embed_oembed_html', $html, $url, $attr, $post_ID );
|
|
}
|
|
|
|
// Still unknown
|
|
return $this->maybe_make_link( $url );
|
|
}
|
|
|
|
/**
|
|
* Delete all oEmbed caches.
|
|
*
|
|
* @param int $post_ID Post ID to delete the caches for.
|
|
*/
|
|
function delete_oembed_caches( $post_ID ) {
|
|
$post_metas = get_post_custom_keys( $post_ID );
|
|
if ( empty($post_metas) )
|
|
return;
|
|
|
|
foreach( $post_metas as $post_meta_key ) {
|
|
if ( '_oembed_' == substr( $post_meta_key, 0, 8 ) )
|
|
delete_post_meta( $post_ID, $post_meta_key );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Triggers a caching of all oEmbed results.
|
|
*
|
|
* @param int $post_ID Post ID to do the caching for.
|
|
*/
|
|
function cache_oembed( $post_ID ) {
|
|
$post = get_post( $post_ID );
|
|
|
|
if ( empty($post->ID) || !in_array( $post->post_type, apply_filters( 'embed_cache_oembed_types', array( 'post', 'page' ) ) ) )
|
|
return;
|
|
|
|
// Trigger a caching
|
|
if ( !empty($post->post_content) ) {
|
|
$this->post_ID = $post->ID;
|
|
$this->usecache = false;
|
|
|
|
$content = $this->run_shortcode( $post->post_content );
|
|
if ( get_option('embed_autourls') )
|
|
$this->autoembed( $content );
|
|
|
|
$this->usecache = true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Passes any unlinked URLs that are on their own line to {@link WP_Embed::shortcode()} for potential embedding.
|
|
*
|
|
* @uses WP_Embed::autoembed_callback()
|
|
*
|
|
* @param string $content The content to be searched.
|
|
* @return string Potentially modified $content.
|
|
*/
|
|
function autoembed( $content ) {
|
|
return preg_replace_callback( '|^\s*(https?://[^\s"]+)\s*$|im', array(&$this, 'autoembed_callback'), $content );
|
|
}
|
|
|
|
/**
|
|
* Callback function for {@link WP_Embed::autoembed()}.
|
|
*
|
|
* @uses WP_Embed::shortcode()
|
|
*
|
|
* @param array $match A regex match array.
|
|
* @return string The embed HTML on success, otherwise the original URL.
|
|
*/
|
|
function autoembed_callback( $match ) {
|
|
$oldval = $this->linkifunknown;
|
|
$this->linkifunknown = false;
|
|
$return = $this->shortcode( array(), $match[1] );
|
|
$this->linkifunknown = $oldval;
|
|
|
|
return "\n$return\n";
|
|
}
|
|
|
|
/**
|
|
* Conditionally makes a hyperlink based on an internal class variable.
|
|
*
|
|
* @param string $url URL to potentially be linked.
|
|
* @return string Linked URL or the original URL.
|
|
*/
|
|
function maybe_make_link( $url ) {
|
|
$output = ( $this->linkifunknown ) ? '<a href="' . esc_attr($url) . '">' . esc_html($url) . '</a>' : $url;
|
|
return apply_filters( 'embed_maybe_make_link', $output, $url );
|
|
}
|
|
}
|
|
$wp_embed = new WP_Embed();
|
|
|
|
/**
|
|
* 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, $priority );
|
|
}
|
|
|
|
/**
|
|
* Create default array of embed parameters.
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @return array Default embed parameters.
|
|
*/
|
|
function wp_embed_defaults() {
|
|
if ( !empty($GLOBALS['content_width']) )
|
|
$theme_width = (int) $GLOBALS['content_width'];
|
|
|
|
$width = get_option('embed_size_w');
|
|
|
|
if ( empty($width) && !empty($theme_width) )
|
|
$width = $theme_width;
|
|
|
|
if ( empty($width) )
|
|
$width = 500;
|
|
|
|
$height = get_option('embed_size_h');
|
|
|
|
if ( empty($height) )
|
|
$height = 700;
|
|
|
|
return apply_filters( 'embed_defaults', array(
|
|
'width' => $width,
|
|
'height' => $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 embeded.
|
|
* @param array $args Addtional arguments and parameters.
|
|
* @return string The original URL on failure or the embed HTML on success.
|
|
*/
|
|
function wp_oembed_get( $url, $args = '' ) {
|
|
require_once( ABSPATH . WPINC . '/class-oembed.php' );
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|
$oembed = _wp_oembed_get_object();
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|
return $oembed->get_html( $url, $args );
|
|
}
|
|
|
|
/**
|
|
* Adds a URL format and oEmbed provider URL pair.
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|
*
|
|
* @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 );
|
|
}
|