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<?php
/**
* Functions and filters for handling the output of post formats. This file is only loaded if
* themes declare support for `post-formats`.
*
* @package HybridCore
* @subpackage Includes
* @author Justin Tadlock <justin@justintadlock.com>
* @copyright Copyright (c) 2008 - 2015, Justin Tadlock
* @link http://themehybrid.com/hybrid-core
* @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*/
# Add support for structured post formats.
add_action( 'wp_loaded', 'hybrid_structured_post_formats', 0 );
/**
* Theme compatibility for post formats. This function adds appropriate filters to 'the_content' for
* the various post formats that a theme supports.
*
* @since 1.6.0
* @access public
* @return void
*/
function hybrid_structured_post_formats() {
// Add infinity symbol to aside posts.
if ( current_theme_supports( 'post-formats', 'aside' ) )
add_filter( 'the_content', 'hybrid_aside_infinity', 9 ); // run before wpautop
// Adds the link to the content if it's not in the post.
if ( current_theme_supports( 'post-formats', 'link' ) )
add_filter( 'the_content', 'hybrid_link_content', 9 ); // run before wpautop
// Wraps `<blockquote>` around quote posts.
if ( current_theme_supports( 'post-formats', 'quote' ) )
add_filter( 'the_content', 'hybrid_quote_content' );
// Filter the content of chat posts.
if ( current_theme_supports( 'post-formats', 'chat' ) )
add_filter( 'the_content', 'hybrid_chat_content', 9 ); // run before wpautop
}
/**
* Strips the 'post-format-' prefix from a post format (term) slug.
*
* @since 1.6.0
* @access public
* @param string $slug
* @return string
*/
function hybrid_clean_post_format_slug( $slug ) {
return str_replace( 'post-format-', '', $slug );
}
/* === Asides === */
/**
* Adds an infinity character "∞" to the end of the post content on 'aside' posts.
*
* @since 1.6.0
* @access public
* @param string $content
* @return string
*/
function hybrid_aside_infinity( $content ) {
if ( has_post_format( 'aside' ) && ! is_singular() && ! post_password_required() )
$content .= apply_filters( 'hybrid_aside_infinity', sprintf( ' <a class="permalink" href="%s">∞</a>', esc_url( get_permalink() ) ) );
return $content;
}
/* === Images === */
/**
* Adds the post format image to the content if no image is found in the post content. Note, this is not run
* by default. To use, add the filter to 'the_content'.
*
* @since 1.6.0
* @access public
* @param string $content
* @return string
*/
function hybrid_image_content( $content ) {
if ( has_post_format( 'image' ) && ! post_password_required() ) {
preg_match( '/<img.*?>/', $content, $matches );
if ( empty( $matches ) && function_exists( 'get_the_image' ) )
$content = get_the_image( array( 'meta_key' => false, 'size' => 'large', 'link' => false, 'echo' => false ) ) . $content;
elseif ( empty( $matches ) )
$content = get_the_post_thumbnail( get_the_ID(), 'large' ) . $content;
}
return $content;
}
/* === Links === */
/**
* Filters the content of the link format posts. Wraps the content in the `make_clickable()` function
* so that users can enter just a URL into the post content editor.
*
* @since 1.6.0
* @access public
* @param string $content
* @return string
*/
function hybrid_link_content( $content ) {
if ( has_post_format( 'link' ) && ! post_password_required() && ! preg_match( '/<a\s[^>]*?href=[\'"](.+?)[\'"]/is', $content ) )
$content = make_clickable( $content );
return $content;
}
/* === Quotes === */
/**
* Checks if the quote post has a <blockquote> tag within the content. If not, wraps the entire post
* content with one.
*
* @since 1.6.0
* @access public
* @param string $content
* @return string
*/
function hybrid_quote_content( $content ) {
if ( has_post_format( 'quote' ) && ! post_password_required() ) {
preg_match( '/<blockquote.*?>/', $content, $matches );
if ( empty( $matches ) )
$content = "<blockquote>{$content}</blockquote>";
}
return $content;
}
/* === Chats === */
/**
* This function filters the post content when viewing a post with the "chat" post format.
*
* @since 1.6.0
* @access public
* @param string $content
* @return string
*/
function hybrid_chat_content( $content ) {
return has_post_format( 'chat' ) && ! post_password_required() ? hybrid_get_chat_transcript( $content ) : $content;
}
/**
* Gets a chat transcript.
*
* @since 3.0.0
* @access public
* @param string $content
* @return string
*/
function hybrid_get_chat_transcript( $content ) {
$chat = new Hybrid_Chat( $content );
return $chat->get_transcript();
}