Ticket #17470: 17470.3.diff

src/wp-admin/edit-form-advanced.php

@@ -45 +45 @@
 $user_ID = isset($user_ID) ? (int) $user_ID : 0;
 $action = isset($action) ? $action : '';
 
+if ( $post_ID == get_option( 'page_for_posts' ) && empty( $post->post_content ) ) {
+        add_action( 'edit_form_after_title', '_wp_posts_page_notice' );
+        remove_post_type_support( $post_type, 'editor' );
+}
+
 $thumbnail_support = current_theme_supports( 'post-thumbnails', $post_type ) && post_type_supports( $post_type, 'thumbnail' );
 if ( ! $thumbnail_support && 'attachment' === $post_type && $post->post_mime_type ) {
         if ( 0 === strpos( $post->post_mime_type, 'audio/' ) ) {

src/wp-admin/includes/meta-boxes.php

@@ -739 +739 @@
 <?php
                 } // end empty pages check
         } // end hierarchical check.
-        if ( 'page' == $post->post_type && 0 != count( get_page_templates( $post ) ) ) {
+        if ( 'page' == $post->post_type && 0 != count( get_page_templates( $post ) ) && get_option( 'page_for_posts' ) != $post->ID ) {
                 $template = !empty($post->page_template) ? $post->page_template : false;
                 ?>
 <p><strong><?php _e('Template') ?></strong></p>

src/wp-admin/includes/template.php

@@ -2169 +2169 @@
         echo str_repeat( '<div class="star star-empty"></div>', $empty_stars);
         echo '</div>';
 }
+
+/**
+ * Output a notice when editing the page for posts.
+ *
+ * @since 4.2.0
+ */
+function _wp_posts_page_notice() {
+        echo '<div class="notice notice-warning inline"><p>' . __( 'You are currently editing the page that shows your latest posts.' ) . '</p></div>';
+}