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Second pass on twentyten/functions.php inline documentation. see #12695. Also: 

rename twentyten_init() to twentyten_setup(), to reflect the hook it is run on (init would be too late, it must be after_setup_theme). Remove unnecessary twentyten_get_page_number() and transfer functionality to twentyten_the_page_number(). Remove the function_exists() wrappers from functions that are simply tied to a hook, as a better practice would be to remove the hook instead of plugging the function. For architecture changes, see #12748.

git-svn-id: https://develop.svn.wordpress.org/trunk@13886 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Andrew Nacin 2010-03-30 00:05:17 +00:00
parent f15366a78c
commit e6e9ad218d
1 changed files with 110 additions and 76 deletions
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186
wp-content/themes/twentyten/functions.php
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@ -2,8 +2,32 @@
/**
* TwentyTen functions and definitions
*
* Sets up the theme and provides some helper functions used
* in other parts of the theme. All functions are pluggable
* Sets up the theme and provides some helper functions. Some helper functions
* are used in the theme as custom template tags. Others are attached to action and
* filter hooks in WordPress to change core functionality.
*
* The first function, twentyten_setup(), sets up the theme by registering support
* for various features in WordPress, such as post thumbnails, navigation menus, and the like.
*
* When using a child theme (see http://codex.wordpress.org/Theme_Development), you can
* override certain functions (those wrapped in a function_exists() call) by defining
* them first in your child theme's functions.php file. The child theme's functions.php
* file is included before the parent theme's file, so the child theme functions would
* be used.
*
* Functions that are not pluggable (not wrapped in function_exists()) are instead attached
* to a filter or action hook. The hook can be removed by using remove_action() or
* remove_filter() and you can attach your own function to the hook. For example:
*
* <code>
* remove_action( 'after_setup_theme', 'twentyten_setup' );
* add_action( 'after_setup_theme', 'my_child_theme_setup' );
* function my_child_theme_setup() {
* ...
* }
* </code>
*
* For more information on hooks, see http://codex.wordpress.org/Plugin_API.
*
* @package WordPress
* @subpackage Twenty Ten
@ -11,43 +35,48 @@
*/
/**
* Set the content width based on the Theme CSS. Can be overriden
* Set the content width based on the theme's design and stylesheet.
*
* Used in attachment.php to set the width of images. Should
* be equal to the width set for .onecolumn #content in style.css
* Used to set the width of images and content. Should be equal to the width the theme
* is designed for, generally via the style.css stylesheet.
*/
if ( ! isset( $content_width ) )
$content_width = 640;
if ( ! function_exists( 'twentyten_init' ) ) :
/** Tell WordPress to run twentyten_setup() when the 'after_setup_theme' hook is run. */
add_action( 'after_setup_theme', 'twentyten_setup' );
/**
* Set up defaults for our theme.
* Sets up theme defaults and registers support for various WordPress features.
*
* Sets up theme defaults and tells wordpress that this is a
* theme that will take advantage of Post Thumbnails, Custom
* Background, Nav Menus and automatic feed links. To
* override any of the settings in a child theme, create your
* own twentyten_init function
* Note that this function is hooked into the after_setup_theme hook, which runs
* before the init hook. The init hook is too late for some features, such as indicating
* support post thumbnails.
*
* @uses add_theme_support()
* To override twentyten_setup() in a child theme, remove the action hook and add your own
* function tied to the after_setup_theme hook.
*
* @uses add_theme_support() To add support for post thumbnails, navigation menus, and automatic feed links.
* @uses add_custom_background() To add support for a custom background.
* @uses add_editor_style() To style the visual editor.
* @uses load_theme_textdomain() For translation/localization support.
* @uses add_custom_image_header() To add support for a custom header.
* @uses register_default_headers() To register the default custom header images provided with the theme.
* @uses set_post_thumbnail_size() To set a custom post thumbnail size.
*
* @since 3.0.0
*/
function twentyten_init() {
// This theme allows users to set a custom background
add_custom_background();
function twentyten_setup() {
// This theme styles the visual editor with editor-style.css to match the theme style.
add_editor_style();
// This theme needs post thumbnails
// This theme uses post thumbnails
add_theme_support( 'post-thumbnails' );
// This theme uses wp_nav_menu()
add_theme_support( 'nav-menus' );
// We'll be using them for custom header images on posts and pages
// so we want them to be 940 pixels wide by 198 pixels tall (larger images will be auto-cropped to fit)
set_post_thumbnail_size( HEADER_IMAGE_WIDTH, HEADER_IMAGE_HEIGHT, true );
// Add default posts and comments RSS feed links to head
add_theme_support( 'automatic-feed-links' );
@ -60,22 +89,33 @@ function twentyten_init() {
if ( is_readable( $locale_file ) )
require_once( $locale_file );
// Your Changeable header business starts here
// No CSS, just IMG call
define( 'HEADER_TEXTCOLOR', '' );
define( 'HEADER_IMAGE', '%s/images/headers/forestfloor.jpg' ); // %s is theme dir uri
// This theme allows users to set a custom background
add_custom_background();
// Add a filter to twentyten_header_image_width and twentyten_header_image_height to change these values
// Your changeable header business starts here
define( 'HEADER_TEXTCOLOR', '' );
// No CSS, just IMG call. The %s is a placeholder for the theme template directory URI.
define( 'HEADER_IMAGE', '%s/images/headers/forestfloor.jpg' );
// The height and width of your custom header. You can hook into the theme's own filters to change these values.
// Add a filter to twentyten_header_image_width and twentyten_header_image_height to change these values.
define( 'HEADER_IMAGE_WIDTH', apply_filters( 'twentyten_header_image_width', 940 ) );
define( 'HEADER_IMAGE_HEIGHT', apply_filters( 'twentyten_header_image_height', 198 ) );
// We'll be using post thumbnails for custom header images on posts and pages.
// We want them to be 940 pixels wide by 198 pixels tall (larger images will be auto-cropped to fit).
set_post_thumbnail_size( HEADER_IMAGE_WIDTH, HEADER_IMAGE_HEIGHT, true );
// Don't support text inside the header image.
define( 'NO_HEADER_TEXT', true );
// Add a way for the custom header to be styled in the admin panel that controls
// custom headers. See twentyten_admin_header_style(), below.
add_custom_image_header( '', 'twentyten_admin_header_style' );
// and thus ends the changeable header business
// Default custom headers. %s is a placeholder for the theme template directory
// ... and thus ends the changeable header business.
// Default custom headers packaged with the theme. %s is a placeholder for the theme template directory URI.
register_default_headers( array (
'berries' => array (
'url' => '%s/images/headers/berries.jpg',
@ -119,12 +159,14 @@ function twentyten_init() {
)
) );
}
endif;
add_action( 'after_setup_theme', 'twentyten_init' );
if ( ! function_exists( 'twentyten_admin_header_style' ) ) :
/**
* Callback to style the header image inside the admin
* Styles the header image displayed on the Appearance > Header admin panel.
*
* Referenced via add_custom_image_header() in twentyten_setup().
*
* @since 3.0.0
*/
function twentyten_admin_header_style() {
?>
@ -141,65 +183,69 @@ function twentyten_admin_header_style() {
}
endif;
if ( ! function_exists( 'twentyten_get_page_number' ) ) :
/**
* Returns the page number currently being browsed
*
* Returns a vertical bar followed by page and the page
* number. Is pluggable
*
* @retun string
*/
function twentyten_get_page_number() {
if ( get_query_var( 'paged' ) )
return ' | ' . __( 'Page ' , 'twentyten' ) . get_query_var( 'paged' );
}
endif;
if ( ! function_exists( 'twentyten_the_page_number' ) ) :
/**
* Echos the page number being browsed
* Prints the page number currently being browsed, with a vertical bar before it.
*
* @uses twentyten_get_page_number
* Used in Twenty Ten's header.php to add the page number to the <title> HTML tag.
*
* @since 3.0.0
*/
function twentyten_the_page_number() {
echo twentyten_get_page_number();
if ( get_query_var( 'paged' ) )
echo ' | ' . __( 'Page ' , 'twentyten' ) . get_query_var( 'paged' );
}
endif;
if ( ! function_exists( 'twentyten_excerpt_length' ) ) :
/**
* Sets the excerpt length to 40 charachters. Is pluggable
* Sets the post excerpt length to 40 characters.
*
* To override this length in a child theme, remove the filter and add your own
* function tied to the excerpt_length filter hook.
*
* @return int
*/
function twentyten_excerpt_length( $length ) {
return 40;
}
endif;
add_filter( 'excerpt_length', 'twentyten_excerpt_length' );
if ( ! function_exists( 'twentyten_excerpt_more' ) ) :
/**
* Sets the read more link for excerpts to something pretty
* Sets the "read more" link to something pretty.
*
* @return string
* To override this link in a child theme, remove the filter and add your own
* function tied to the excerpt_more filter hook.
*
* @since 3.0.0
* @return string A pretty 'Continue reading' link.
*/
function twentyten_excerpt_more( $more ) {
return '&nbsp;&hellip; <a href="'. get_permalink() . '">' . __('Continue&nbsp;reading&nbsp;<span class="meta-nav">&rarr;</span>', 'twentyten') . '</a>';
}
endif;
add_filter( 'excerpt_more', 'twentyten_excerpt_more' );
/**
* Remove inline styles printed when the gallery shortcode is used.
*
* Galleries are styled by the theme in Twenty Ten's style.css.
*
* @return string The gallery style filter, with the styles themselves removed.
*/
function twentyten_remove_gallery_css( $css ) {
return preg_replace( "#<style type='text/css'>(.*?)</style>#s", '', $css );
}
add_filter( 'gallery_style', 'twentyten_remove_gallery_css' );
if ( ! function_exists( 'twentyten_comment' ) ) :
/**
* Template for comments and pingbacks
* Template for comments and pingbacks.
*
* Used as a callback by wp_list_comments for displaying the
* comments. Is pluggable
* To override this walker in a child theme without modifying the comments template
* simply create your own twentyten_comment(), and that function will be used instead.
*
* Used as a callback by wp_list_comments() for displaying the comments.
*
* @since 3.0.0
*/
function twentyten_comment( $comment, $args, $depth ) {
$GLOBALS ['comment'] = $comment; ?>
@ -231,18 +277,6 @@ function twentyten_comment( $comment, $args, $depth ) {
}
endif;
if ( ! function_exists( 'twentyten_remove_gallery_css' ) ) :
/**
* Remove inline styles on gallery shortcode
*
* @return string
*/
function twentyten_remove_gallery_css( $css ) {
return preg_replace( "#<style type='text/css'>(.*?)</style>#s", '', $css );
}
endif;
add_filter( 'gallery_style', 'twentyten_remove_gallery_css' );
if ( ! function_exists( 'twentyten_cat_list' ) ) :
/**
* Returns the list of categories
@ -275,6 +309,7 @@ function twentyten_tag_list() {
}
endif;
if ( ! function_exists( 'twentyten_term_list' ) ) :
/**
* Returns the list of taxonomy items in multiple ways
@ -313,10 +348,11 @@ function twentyten_term_list( $taxonomy, $glue = ', ', $text = '', $also_text =
}
endif;
if ( ! function_exists( 'twentyten_widgets_init' ) ) :
/**
* Register widgetized areas
* Register widgetized areas, including two sidebars and four widget-ready columns in the footer.
*
* To override twentyten_widgets_init() in a child theme, remove the action hook and add your own
* function tied to the init hook.
* @uses register_sidebar
*/
function twentyten_widgets_init() {
@ -385,7 +421,5 @@ function twentyten_widgets_init() {
'before_title' => '<h3 class="widget-title">',
'after_title' => '</h3>',
) );
}
endif;
add_action( 'init', 'twentyten_widgets_init' );
add_action( 'init', 'twentyten_widgets_init' );