Commit c0bb9c25 authored by John Blackbourn's avatar John Blackbourn

Themes: Improve child theme file inheritance by introducing functions for...

Themes: Improve child theme file inheritance by introducing functions for locating and fetching the URL or path to files within child and parent themes.

The most useful function this introduces is `get_theme_file_uri()`, which returns the URL to the specified file in the child theme if it exists, and falls back to the URL to the specified file in the parent theme. This allows parent themes to reference files (including enqueuing CSS and JavaScript files) that can be overridden by the child theme simply by existing.

This change also introduces `get_theme_file_path()`, which is the file path equivalent of `get_theme_file_uri()`.

Finally, `get_parent_theme_file_uri()` and `get_parent_theme_file_path()` are also introduced, which allow a theme to specifically reference a file URL or file path in the parent theme. These can be used as replacements for `get_template_directory_uri()` and `get_template_directory()` respectively, for consistency.

Props johnbillion, georgestephanis, gma992.
Fixes #18302

Built from https://develop.svn.wordpress.org/trunk@38578


git-svn-id: http://core.svn.wordpress.org/trunk@38521 1a063a9b-81f0-0310-95a4-ce76da25c4cd
parent c1a0ed85
......@@ -930,7 +930,7 @@ function get_edit_term_link( $term_id, $taxonomy = '', $object_type = '' ) {
}
$tax = get_taxonomy( $term->taxonomy );
if ( ! $tax || ! current_user_can( $tax->cap->edit_terms ) ) {
if ( ! $tax || ! current_user_can( 'edit_term', $term->term_id ) ) {
return;
}
......@@ -984,8 +984,9 @@ function edit_term_link( $link = '', $before = '', $after = '', $term = null, $e
return;
$tax = get_taxonomy( $term->taxonomy );
if ( ! current_user_can( $tax->cap->edit_terms ) )
if ( ! current_user_can( 'edit_term', $term->term_id ) ) {
return;
}
if ( empty( $link ) )
$link = __('Edit This');
......@@ -4023,3 +4024,125 @@ function get_avatar_data( $id_or_email, $args = null ) {
*/
return apply_filters( 'get_avatar_data', $args, $id_or_email );
}
/**
* Retrieve the URL of a file in the theme.
*
* Searches in the stylesheet directory before the template directory so themes
* which inherit from a parent theme can just override one file.
*
* @since 4.7.0
*
* @param string $file Optional. File to search for in the stylesheet directory.
* @return string The URL of the file.
*/
function get_theme_file_uri( $file = '' ) {
$file = ltrim( $file, '/' );
if ( empty( $file ) ) {
$url = get_stylesheet_directory_uri();
} elseif ( file_exists( get_stylesheet_directory() . '/' . $file ) ) {
$url = get_stylesheet_directory_uri() . '/' . $file;
} else {
$url = get_template_directory_uri() . '/' . $file;
}
/**
* Filter the URL to a file in the theme.
*
* @since 4.7.0
*
* @param string $url The file URL.
* @param string $file The requested file to search for.
*/
return apply_filters( 'theme_file_uri', $url, $file );
}
/**
* Retrieve the URL of a file in the parent theme.
*
* @since 4.7.0
*
* @param string $file Optional. File to return the URL for in the template directory.
* @return string The URL of the file.
*/
function get_parent_theme_file_uri( $file = '' ) {
$file = ltrim( $file, '/' );
if ( empty( $file ) ) {
$url = get_template_directory_uri();
} else {
$url = get_template_directory_uri() . '/' . $file;
}
/**
* Filter the URL to a file in the parent theme.
*
* @since 4.7.0
*
* @param string $url The file URL.
* @param string $file The requested file to search for.
*/
return apply_filters( 'parent_theme_file_uri', $url, $file );
}
/**
* Retrieve the path of a file in the theme.
*
* Searches in the stylesheet directory before the template directory so themes
* which inherit from a parent theme can just override one file.
*
* @since 4.7.0
*
* @param string $file Optional. File to search for in the stylesheet directory.
* @return string The path of the file.
*/
function get_theme_file_path( $file = '' ) {
$file = ltrim( $file, '/' );
if ( empty( $file ) ) {
$path = get_stylesheet_directory();
} elseif ( file_exists( get_stylesheet_directory() . '/' . $file ) ) {
$path = get_stylesheet_directory() . '/' . $file;
} else {
$path = get_template_directory() . '/' . $file;
}
/**
* Filter the path to a file in the theme.
*
* @since 4.7.0
*
* @param string $path The file path.
* @param string $file The requested file to search for.
*/
return apply_filters( 'theme_file_path', $path, $file );
}
/**
* Retrieve the path of a file in the parent theme.
*
* @since 4.7.0
*
* @param string $file Optional. File to return the path for in the template directory.
* @return string The path of the file.
*/
function get_parent_theme_file_path( $file = '' ) {
$file = ltrim( $file, '/' );
if ( empty( $file ) ) {
$path = get_template_directory();
} else {
$path = get_template_directory() . '/' . $file;
}
/**
* Filter the path to a file in the parent theme.
*
* @since 4.7.0
*
* @param string $path The file path.
* @param string $file The requested file to search for.
*/
return apply_filters( 'parent_theme_file_path', $path, $file );
}
......@@ -4,7 +4,7 @@
*
* @global string $wp_version
*/
$wp_version = '4.7-alpha-38577';
$wp_version = '4.7-alpha-38578';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
......
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