");
$i = 0;
foreach ( $attachments as $id => $attachment ) {
@@ -670,7 +767,7 @@ function gallery_shortcode($attr) {
if ( $captiontag && trim($attachment->post_excerpt) ) {
$output .= "
<{$captiontag} class='gallery-caption'>
- {$attachment->post_excerpt}
+ " . wptexturize($attachment->post_excerpt) . "
";
}
$output .= "";
@@ -689,18 +786,24 @@ function gallery_shortcode($attr) {
* 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 $text variable.
+ * @return string HTML content.
*/
-function previous_image_link() {
- adjacent_image_link(true);
+function previous_image_link($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 $text variable.
+ * @return string HTML content.
*/
-function next_image_link() {
- adjacent_image_link(false);
+function next_image_link($size = 'thumbnail', $text = false) {
+ adjacent_image_link(false, $size, $text);
}
/**
@@ -712,7 +815,7 @@ function next_image_link() {
*
* @param bool $prev Optional. Default is true to display previous link, true for next.
*/
-function adjacent_image_link($prev = true) {
+function adjacent_image_link($prev = true, $size = 'thumbnail', $text = false) {
global $post;
$post = get_post($post);
$attachments = array_values(get_children( array('post_parent' => $post->post_parent, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC', 'orderby' => 'menu_order ID') ));
@@ -724,7 +827,7 @@ function adjacent_image_link($prev = true) {
$k = $prev ? $k - 1 : $k + 1;
if ( isset($attachments[$k]) )
- echo wp_get_attachment_link($attachments[$k]->ID, 'thumbnail', true);
+ echo wp_get_attachment_link($attachments[$k]->ID, $size, true, false, $text);
}
/**
@@ -766,4 +869,435 @@ function get_attachment_taxonomies($attachment) {
return array_unique($taxonomies);
}
+/**
+ * Check if the installed version of GD supports particular image type
+ *
+ * @since 2.9.0
+ *
+ * @param $mime_type string
+ * @return bool
+ */
+function gd_edit_image_support($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 $width
+ * @param $height
+ * @return image resource
+ */
+function wp_imagecreatetruecolor($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;
+
+ /**
+ * PHP4 constructor
+ */
+ function WP_Embed() {
+ return $this->__construct();
+ }
+
+ /**
+ * PHP5 constructor
+ */
+ function __construct() {
+ // Hack to get the [embed] shortcode to run before wpautop()
+ add_filter( 'the_content', array(&$this, 'run_shortcode'), 8 );
+
+ // 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;
+
+ // Backup 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 != $_GET['message'] )
+ return;
+
?>
+
+handlers[$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() );
+
+ // 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 );
+ }
+
+ // Use oEmbed to get the HTML
+ $attr['discover'] = ( apply_filters('embed_oembed_discover', false) && author_can( $post_ID, 'unfiltered_html' ) ) ? true : false;
+ $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 );
+ }
+
+ // 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 = ( $this->linkifunknown ) ? '
' . esc_html($url) . '' : $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'];
+
+ $width = get_option('embed_size_w');
+
+ if ( !$width && !empty($theme_width) )
+ $width = $theme_width;
+
+ if ( !$width )
+ $width = 500;
+
+ return apply_filters( 'embed_defaults', array(
+ 'width' => $width,
+ 'height' => 700,
+ ) );
+}
+
+/**
+ * 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( 'class-oembed.php' );
+ $oembed = _wp_oembed_get_object();
+ return $oembed->get_html( $url, $args );
+}
+
+/**
+ * Adds a URL format and oEmbed provider URL pair.
+ *
+ * @since 2.9.0
+ * @see WP_oEmbed
+ *
+ * @uses _wp_oembed_get_object()
+ *
+ * @param string $format The format of URL that this provider can handle. You can use asterisks as wildcards.
+ * @param string $provider The URL to the oEmbed provider.
+ * @param boolean $regex Whether the $format parameter is in a regex format or not.
+ */
+function wp_oembed_add_provider( $format, $provider, $regex = false ) {
+ require_once( 'class-oembed.php' );
+ $oembed = _wp_oembed_get_object();
+ $oembed->providers[$format] = array( $provider, $regex );
+}