Changeset 33492 for trunk/src/wp-includes/theme.php

Timestamp:

07/29/2015 06:35:40 PM (9 years ago)

Author:

ocean90

Message:

Themes: Remove legacy theme preview.

The pre-3.4 theme previewer doesn't work when using a static front page.
We kept the old theme preview for no-JS and some browsers that were less capable. But since browsers are doing a better job today we don't need to continue fixing/shipping this legacy code. Bye!

fixes #33178.

File:

• trunk/src/wp-includes/theme.php (modified) (1 diff)

trunk/src/wp-includes/theme.php

@@ -662 +662 @@
 
 /**
- * Start preview theme output buffer.
- *
- * Will only perform task if the user has permissions and template and preview
- * query variables exist.
- *
- * @since 2.6.0
- */
-function preview_theme() {
-    if ( ! (isset($_GET['template']) && isset($_GET['preview'])) )
-        return;
-
-    if ( !current_user_can( 'switch_themes' ) )
-        return;
-
-    // Admin Thickbox requests
-    if ( isset( $_GET['preview_iframe'] ) )
-        show_admin_bar( false );
-
-    $_GET['template'] = preg_replace('|[^a-z0-9_./-]|i', '', $_GET['template']);
-
-    if ( validate_file($_GET['template']) )
-        return;
-
-    add_filter( 'template', '_preview_theme_template_filter' );
-
-    if ( isset($_GET['stylesheet']) ) {
-        $_GET['stylesheet'] = preg_replace('|[^a-z0-9_./-]|i', '', $_GET['stylesheet']);
-        if ( validate_file($_GET['stylesheet']) )
-            return;
-        add_filter( 'stylesheet', '_preview_theme_stylesheet_filter' );
-    }
-
-    // Prevent theme mods to current theme being used on theme being previewed
-    add_filter( 'pre_option_theme_mods_' . get_option( 'stylesheet' ), '__return_empty_array' );
-
-    ob_start( 'preview_theme_ob_filter' );
-}
-
-/**
- * Private function to modify the current template when previewing a theme
- *
- * @since 2.9.0
- * @access private
- *
- * @return string
- */
-function _preview_theme_template_filter() {
-    return isset($_GET['template']) ? $_GET['template'] : '';
-}
-
-/**
- * Private function to modify the current stylesheet when previewing a theme
- *
- * @since 2.9.0
- * @access private
- *
- * @return string
- */
-function _preview_theme_stylesheet_filter() {
-    return isset($_GET['stylesheet']) ? $_GET['stylesheet'] : '';
-}
-
-/**
- * Callback function for ob_start() to capture all links in the theme.
- *
- * @since 2.6.0
- * @access private
- *
- * @param string $content
- * @return string
- */
-function preview_theme_ob_filter( $content ) {
-    return preg_replace_callback( "|(<a.*?href=([\"']))(.*?)([\"'].*?>)|", 'preview_theme_ob_filter_callback', $content );
-}
-
-/**
- * Manipulates preview theme links in order to control and maintain location.
- *
- * Callback function for preg_replace_callback() to accept and filter matches.
- *
- * @since 2.6.0
- * @access private
- *
- * @param array $matches
- * @return string
- */
-function preview_theme_ob_filter_callback( $matches ) {
-    if ( strpos($matches[4], 'onclick') !== false )
-        $matches[4] = preg_replace('#onclick=([\'"]).*?(?<!\\\)\\1#i', '', $matches[4]); //Strip out any onclicks from rest of <a>. (?<!\\\) means to ignore the '" if it's escaped by \  to prevent breaking mid-attribute.
-    if (
-        ( false !== strpos($matches[3], '/wp-admin/') )
-    ||
-        ( false !== strpos( $matches[3], '://' ) && 0 !== strpos( $matches[3], home_url() ) )
-    ||
-        ( false !== strpos($matches[3], '/feed/') )
-    ||
-        ( false !== strpos($matches[3], '/trackback/') )
-    )
-        return $matches[1] . "#$matches[2] onclick=$matches[2]return false;" . $matches[4];
-
-    $stylesheet = isset( $_GET['stylesheet'] ) ? $_GET['stylesheet'] : '';
-    $template   = isset( $_GET['template'] )   ? $_GET['template']   : '';
-
-    $link = add_query_arg( array( 'preview' => 1, 'template' => $template, 'stylesheet' => $stylesheet, 'preview_iframe' => 1 ), $matches[3] );
-    if ( 0 === strpos($link, 'preview=1') )
-        $link = "?$link";
-    return $matches[1] . esc_attr( $link ) . $matches[4];
-}
-
-/**
  * Switches the theme.
  *