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980a3bc810
git-svn-id: http://svn.automattic.com/wordpress/trunk@10227 1a063a9b-81f0-0310-95a4-ce76da25c4cd
770 lines
26 KiB
PHP
770 lines
26 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 $content_width;
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if ( is_array($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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}
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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 string $size Optional, default is 'medium'. Size of image, can be 'thumbnail'.
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* @return bool|array False on failure, array on success.
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*/
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function image_downsize($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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// 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(basename($img_url), $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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$img_url = str_replace(basename($img_url), 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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* 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'.attribute_escape($align).' size-'.attribute_escape($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="'.attribute_escape($img_src).'" alt="'.attribute_escape($alt).'" title="'.attribute_escape($title).'" '.$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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* Calculates the new dimentions for a downsampled image.
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*
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* Same as {@link wp_shrink_dimensions()}, except the max parameters are
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* optional. 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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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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if ( $max_height > 0 && $current_height > 0 && $current_height > $max_height )
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$height_ratio = $max_height / $current_height;
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// the smaller ratio is the one we need to fit it to the constraining box
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$ratio = min( $width_ratio, $height_ratio );
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return array( intval($current_width * $ratio), intval($current_height * $ratio) );
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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 = ceil($new_w / $size_ratio);
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$crop_h = ceil($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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}
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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, $s_x, $s_y, $new_w, $new_h, $crop_w, $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. Array of dimensions from {@link image_resize_dimensions()}
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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', $image);
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list($orig_w, $orig_h, $orig_type) = getimagesize( $file );
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$dims = image_resize_dimensions($orig_w, $orig_h, $max_w, $max_h, $crop);
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if (!$dims)
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return $dims;
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list($dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) = $dims;
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$newimage = imagecreatetruecolor( $dst_w, $dst_h);
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// preserve PNG transparency
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if ( IMAGETYPE_PNG == $orig_type && function_exists( 'imagealphablending' ) && function_exists( 'imagesavealpha' ) ) {
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imagealphablending( $newimage, false);
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imagesavealpha( $newimage, true);
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}
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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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// we don't need the original in memory anymore
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imagedestroy( $image );
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// $suffix will be appended to the destination filename, just before the extension
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if ( !$suffix )
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$suffix = "{$dst_w}x{$dst_h}";
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$info = pathinfo($file);
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$dir = $info['dirname'];
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$ext = $info['extension'];
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$name = basename($file, ".{$ext}");
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if ( !is_null($dest_path) and $_dest_path = realpath($dest_path) )
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$dir = $_dest_path;
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$destfilename = "{$dir}/{$name}-{$suffix}.{$ext}";
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if ( $orig_type == IMAGETYPE_GIF ) {
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if (!imagegif( $newimage, $destfilename ) )
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return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
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}
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elseif ( $orig_type == IMAGETYPE_PNG ) {
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if (!imagepng( $newimage, $destfilename ) )
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return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
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}
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else {
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// all other formats are converted to jpg
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$destfilename = "{$dir}/{$name}-{$suffix}.jpg";
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if (!imagejpeg( $newimage, $destfilename, apply_filters( 'jpeg_quality', $jpeg_quality ) ) )
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return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
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}
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imagedestroy( $newimage );
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// Set correct file permissions
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$stat = stat( dirname( $destfilename ));
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$perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits
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@ chmod( $destfilename, $perms );
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return $destfilename;
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}
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/**
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* Resize an image to make a thumbnail or intermediate size.
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*
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* The returned array has the file size, the image width, and image height. The
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* filter 'image_make_intermediate_size' can be used to hook in and change the
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* values of the returned array. The only parameter is the resized file path.
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*
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* @since 2.5.0
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*
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* @param string $file File path.
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* @param int $width Image width.
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* @param int $height Image height.
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* @param bool $crop Optional, default is false. Whether to crop image to specified height and width or resize.
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* @return bool|array False, if no image was created. Metadata array on success.
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*/
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function image_make_intermediate_size($file, $width, $height, $crop=false) {
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if ( $width || $height ) {
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$resized_file = image_resize($file, $width, $height, $crop);
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if ( !is_wp_error($resized_file) && $resized_file && $info = getimagesize($resized_file) ) {
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$resized_file = apply_filters('image_make_intermediate_size', $resized_file);
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return array(
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'file' => basename( $resized_file ),
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'width' => $info[0],
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'height' => $info[1],
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);
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}
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}
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return false;
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}
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/**
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* Retrieve the image's intermediate size (resized) path, width, and height.
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*
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* The $size parameter can be an array with the width and height respectively.
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* If the size matches the 'sizes' metadata array for width and height, then it
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* will be used. If there is no direct match, then the nearest image size larger
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* than the specified size will be used. If nothing is found, then the function
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* will break out and return false.
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*
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* The metadata 'sizes' is used for compatible sizes that can be used for the
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* parameter $size value.
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*
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* The url path will be given, when the $size parameter is a string.
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*
|
|
* @since 2.5.0
|
|
*
|
|
* @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] ) {
|
|
$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;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
|
|
if ( $icon && $src = wp_mime_type_icon($attachment_id) ) {
|
|
$icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/crystal' );
|
|
$src_file = $icon_dir . '/' . basename($src);
|
|
@list($width, $height) = getimagesize($src_file);
|
|
}
|
|
if ( $src && $width && $height )
|
|
return array( $src, $width, $height );
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Retrieve img HTML content for an image to represent an attachment.
|
|
*
|
|
* @see wp_get_attachment_image_src() Returns img HTML element based on array.
|
|
* @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) {
|
|
|
|
$html = '';
|
|
$image = wp_get_attachment_image_src($attachment_id, $size, $icon);
|
|
if ( $image ) {
|
|
list($src, $width, $height) = $image;
|
|
$hwstring = image_hwstring($width, $height);
|
|
if ( is_array($size) )
|
|
$size = join('x', $size);
|
|
$html = '<img src="'.attribute_escape($src).'" '.$hwstring.'class="attachment-'.attribute_escape($size).'" alt="" />';
|
|
}
|
|
|
|
return $html;
|
|
}
|
|
|
|
add_shortcode('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="' . $id . '" ';
|
|
|
|
return '<div ' . $id . 'class="wp-caption ' . $align . '" style="width: ' . (10 + (int) $width) . 'px">'
|
|
. $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;
|
|
|
|
// 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'
|
|
), $attr));
|
|
|
|
$id = intval($id);
|
|
$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 $id => $attachment )
|
|
$output .= wp_get_attachment_link($id, $size, true) . "\n";
|
|
return $output;
|
|
}
|
|
|
|
$itemtag = tag_escape($itemtag);
|
|
$captiontag = tag_escape($captiontag);
|
|
$columns = intval($columns);
|
|
$itemwidth = $columns > 0 ? floor(100/$columns) : 100;
|
|
|
|
$output = apply_filters('gallery_style', "
|
|
<style type='text/css'>
|
|
.gallery {
|
|
margin: auto;
|
|
}
|
|
.gallery-item {
|
|
float: left;
|
|
margin-top: 10px;
|
|
text-align: center;
|
|
width: {$itemwidth}%; }
|
|
.gallery img {
|
|
border: 2px solid #cfcfcf;
|
|
}
|
|
.gallery-caption {
|
|
margin-left: 0;
|
|
}
|
|
</style>
|
|
<!-- see gallery_shortcode() in wp-includes/media.php -->
|
|
<div class='gallery'>");
|
|
|
|
$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='gallery-caption'>
|
|
{$attachment->post_excerpt}
|
|
</{$captiontag}>";
|
|
}
|
|
$output .= "</{$itemtag}>";
|
|
if ( $columns > 0 && ++$i % $columns == 0 )
|
|
$output .= '<br style="clear: both" />';
|
|
}
|
|
|
|
$output .= "
|
|
<br style='clear: both;' />
|
|
</div>\n";
|
|
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* Display previous image link that has the same post parent.
|
|
*
|
|
* @since 2.5.0
|
|
*/
|
|
function previous_image_link() {
|
|
adjacent_image_link(true);
|
|
}
|
|
|
|
/**
|
|
* Display next image link that has the same post parent.
|
|
*
|
|
* @since 2.5.0
|
|
*/
|
|
function next_image_link() {
|
|
adjacent_image_link(false);
|
|
}
|
|
|
|
/**
|
|
* 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) {
|
|
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, 'thumbnail', true);
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
?>
|