+/**
+ * Add WordPress rewrite rule to the IIS 7+ configuration file.
+ *
+ * @since 2.8.0
+ *
+ * @param string $filename The file path to the configuration file
+ * @param string $rewrite_rule The XML fragment with URL Rewrite rule
+ * @return bool
+ */
+function iis7_add_rewrite_rule($filename, $rewrite_rule) {
+ if ( ! class_exists('DOMDocument') )
+ return false;
+
+ // If configuration file does not exist then we create one.
+ if ( ! file_exists($filename) ) {
+ $fp = fopen( $filename, 'w');
+ fwrite($fp, '<configuration/>');
+ fclose($fp);
+ }
+
+ $doc = new DOMDocument();
+ $doc->preserveWhiteSpace = false;
+
+ if ( $doc->load($filename) === false )
+ return false;
+
+ $xpath = new DOMXPath($doc);
+
+ // First check if the rule already exists as in that case there is no need to re-add it
+ $wordpress_rules = $xpath->query('/configuration/system.webServer/rewrite/rules/rule[starts-with(@name,\'wordpress\')]');
+ if ( $wordpress_rules->length > 0 )
+ return true;
+
+ // Check the XPath to the rewrite rule and create XML nodes if they do not exist
+ $xmlnodes = $xpath->query('/configuration/system.webServer/rewrite/rules');
+ if ( $xmlnodes->length > 0 ) {
+ $rules_node = $xmlnodes->item(0);
+ } else {
+ $rules_node = $doc->createElement('rules');
+
+ $xmlnodes = $xpath->query('/configuration/system.webServer/rewrite');
+ if ( $xmlnodes->length > 0 ) {
+ $rewrite_node = $xmlnodes->item(0);
+ $rewrite_node->appendChild($rules_node);
+ } else {
+ $rewrite_node = $doc->createElement('rewrite');
+ $rewrite_node->appendChild($rules_node);
+
+ $xmlnodes = $xpath->query('/configuration/system.webServer');
+ if ( $xmlnodes->length > 0 ) {
+ $system_webServer_node = $xmlnodes->item(0);
+ $system_webServer_node->appendChild($rewrite_node);
+ } else {
+ $system_webServer_node = $doc->createElement('system.webServer');
+ $system_webServer_node->appendChild($rewrite_node);
+
+ $xmlnodes = $xpath->query('/configuration');
+ if ( $xmlnodes->length > 0 ) {
+ $config_node = $xmlnodes->item(0);
+ $config_node->appendChild($system_webServer_node);
+ } else {
+ $config_node = $doc->createElement('configuration');
+ $doc->appendChild($config_node);
+ $config_node->appendChild($system_webServer_node);
+ }
+ }
+ }
+ }
+
+ $rule_fragment = $doc->createDocumentFragment();
+ $rule_fragment->appendXML($rewrite_rule);
+ $rules_node->appendChild($rule_fragment);
+
+ $doc->encoding = "UTF-8";
+ $doc->formatOutput = true;
+ saveDomDocument($doc, $filename);
+
+ return true;
+}
+
+/**
+ * Saves the XML document into a file
+ *
+ * @since 2.8.0
+ *
+ * @param DOMDocument $doc
+ * @param string $filename
+ */
+function saveDomDocument($doc, $filename) {
+ $config = $doc->saveXML();
+ $config = preg_replace("/([^\r])\n/", "$1\r\n", $config);
+ $fp = fopen($filename, 'w');
+ fwrite($fp, $config);
+ fclose($fp);
+}
+
+/**
+ * Display the default admin color scheme picker (Used in user-edit.php)
+ *
+ * @since 3.0.0
+ */
+function admin_color_scheme_picker( $user_id ) {
+ global $_wp_admin_css_colors;
+
+ ksort( $_wp_admin_css_colors );
+
+ if ( isset( $_wp_admin_css_colors['fresh'] ) ) {
+ // Set Default ('fresh') and Light should go first.
+ $_wp_admin_css_colors = array_filter( array_merge( array( 'fresh' => '', 'light' => '' ), $_wp_admin_css_colors ) );
+ }
+
+ $current_color = get_user_option( 'admin_color', $user_id );
+
+ if ( empty( $current_color ) || ! isset( $_wp_admin_css_colors[ $current_color ] ) ) {
+ $current_color = 'fresh';
+ }
+
+ ?>
+ <fieldset id="color-picker" class="scheme-list">
+ <legend class="screen-reader-text"><span><?php _e( 'Admin Color Scheme' ); ?></span></legend>
+ <?php
+ wp_nonce_field( 'save-color-scheme', 'color-nonce', false );
+ foreach ( $_wp_admin_css_colors as $color => $color_info ) :
+
+ ?>
+ <div class="color-option <?php echo ( $color == $current_color ) ? 'selected' : ''; ?>">
+ <input name="admin_color" id="admin_color_<?php echo esc_attr( $color ); ?>" type="radio" value="<?php echo esc_attr( $color ); ?>" class="tog" <?php checked( $color, $current_color ); ?> />
+ <input type="hidden" class="css_url" value="<?php echo esc_url( $color_info->url ); ?>" />
+ <input type="hidden" class="icon_colors" value="<?php echo esc_attr( json_encode( array( 'icons' => $color_info->icon_colors ) ) ); ?>" />
+ <label for="admin_color_<?php echo esc_attr( $color ); ?>"><?php echo esc_html( $color_info->name ); ?></label>
+ <table class="color-palette">
+ <tr>
+ <?php
+
+ foreach ( $color_info->colors as $html_color ) {
+ ?>
+ <td style="background-color: <?php echo esc_attr( $html_color ); ?>"> </td>
+ <?php
+ }
+
+ ?>
+ </tr>
+ </table>
+ </div>
+ <?php
+
+ endforeach;
+
+ ?>
+ </fieldset>
+ <?php
+}
+
+function wp_color_scheme_settings() {
+ global $_wp_admin_css_colors;
+
+ $color_scheme = get_user_option( 'admin_color' );
+
+ // It's possible to have a color scheme set that is no longer registered.
+ if ( empty( $_wp_admin_css_colors[ $color_scheme ] ) ) {
+ $color_scheme = 'fresh';
+ }
+
+ if ( ! empty( $_wp_admin_css_colors[ $color_scheme ]->icon_colors ) ) {
+ $icon_colors = $_wp_admin_css_colors[ $color_scheme ]->icon_colors;
+ } elseif ( ! empty( $_wp_admin_css_colors['fresh']->icon_colors ) ) {
+ $icon_colors = $_wp_admin_css_colors['fresh']->icon_colors;
+ } else {
+ // Fall back to the default set of icon colors if the default scheme is missing.
+ $icon_colors = array( 'base' => '#999', 'focus' => '#2ea2cc', 'current' => '#fff' );
+ }
+
+ echo '<script type="text/javascript">var _wpColorScheme = ' . json_encode( array( 'icons' => $icon_colors ) ) . ";</script>\n";
+}
+add_action( 'admin_head', 'wp_color_scheme_settings' );
+
+function _ipad_meta() {
+ if ( wp_is_mobile() ) {
+ ?>
+ <meta name="viewport" id="viewport-meta" content="width=device-width, initial-scale=1">
+ <?php
+ }
+}
+add_action('admin_head', '_ipad_meta');
+
+/**
+ * Check lock status for posts displayed on the Posts screen
+ *
+ * @since 3.6
+ */
+function wp_check_locked_posts( $response, $data, $screen_id ) {
+ $checked = array();
+
+ if ( array_key_exists( 'wp-check-locked-posts', $data ) && is_array( $data['wp-check-locked-posts'] ) ) {
+ foreach ( $data['wp-check-locked-posts'] as $key ) {
+ if ( ! $post_id = absint( substr( $key, 5 ) ) )
+ continue;
+
+ if ( ( $user_id = wp_check_post_lock( $post_id ) ) && ( $user = get_userdata( $user_id ) ) && current_user_can( 'edit_post', $post_id ) ) {
+ $send = array( 'text' => sprintf( __( '%s is currently editing' ), $user->display_name ) );
+
+ if ( ( $avatar = get_avatar( $user->ID, 18 ) ) && preg_match( "|src='([^']+)'|", $avatar, $matches ) )
+ $send['avatar_src'] = $matches[1];
+
+ $checked[$key] = $send;
+ }
+ }
+ }
+
+ if ( ! empty( $checked ) )
+ $response['wp-check-locked-posts'] = $checked;
+
+ return $response;
+}
+add_filter( 'heartbeat_received', 'wp_check_locked_posts', 10, 3 );
+
+/**
+ * Check lock status on the New/Edit Post screen and refresh the lock
+ *
+ * @since 3.6
+ */
+function wp_refresh_post_lock( $response, $data, $screen_id ) {
+ if ( array_key_exists( 'wp-refresh-post-lock', $data ) ) {
+ $received = $data['wp-refresh-post-lock'];
+ $send = array();
+
+ if ( ! $post_id = absint( $received['post_id'] ) )
+ return $response;
+
+ if ( ! current_user_can('edit_post', $post_id) )
+ return $response;
+
+ if ( ( $user_id = wp_check_post_lock( $post_id ) ) && ( $user = get_userdata( $user_id ) ) ) {
+ $error = array(
+ 'text' => sprintf( __( '%s has taken over and is currently editing.' ), $user->display_name )
+ );
+
+ if ( $avatar = get_avatar( $user->ID, 64 ) ) {
+ if ( preg_match( "|src='([^']+)'|", $avatar, $matches ) )
+ $error['avatar_src'] = $matches[1];
+ }
+
+ $send['lock_error'] = $error;
+ } else {
+ if ( $new_lock = wp_set_post_lock( $post_id ) )
+ $send['new_lock'] = implode( ':', $new_lock );
+ }
+
+ $response['wp-refresh-post-lock'] = $send;
+ }
+
+ return $response;
+}
+add_filter( 'heartbeat_received', 'wp_refresh_post_lock', 10, 3 );
+
+/**
+ * Check nonce expiration on the New/Edit Post screen and refresh if needed
+ *
+ * @since 3.6
+ */
+function wp_refresh_post_nonces( $response, $data, $screen_id ) {
+ if ( array_key_exists( 'wp-refresh-post-nonces', $data ) ) {
+ $received = $data['wp-refresh-post-nonces'];
+ $response['wp-refresh-post-nonces'] = array( 'check' => 1 );
+
+ if ( ! $post_id = absint( $received['post_id'] ) )
+ return $response;
+
+ if ( ! current_user_can( 'edit_post', $post_id ) || empty( $received['post_nonce'] ) )
+ return $response;
+
+ if ( 2 === wp_verify_nonce( $received['post_nonce'], 'update-post_' . $post_id ) ) {
+ $response['wp-refresh-post-nonces'] = array(
+ 'replace' => array(
+ 'autosavenonce' => wp_create_nonce('autosave'),
+ 'getpermalinknonce' => wp_create_nonce('getpermalink'),
+ 'samplepermalinknonce' => wp_create_nonce('samplepermalink'),
+ 'closedpostboxesnonce' => wp_create_nonce('closedpostboxes'),
+ '_ajax_linking_nonce' => wp_create_nonce( 'internal-linking' ),
+ '_wpnonce' => wp_create_nonce( 'update-post_' . $post_id ),
+ ),
+ 'heartbeatNonce' => wp_create_nonce( 'heartbeat-nonce' ),
+ );
+ }
+ }
+
+ return $response;
+}
+add_filter( 'heartbeat_received', 'wp_refresh_post_nonces', 10, 3 );
+
+/**
+ * Disable suspension of Heartbeat on the Add/Edit Post screens.
+ *
+ * @since 3.8.0
+ *
+ * @param array $settings An array of Heartbeat settings.
+ * @return array Filtered Heartbeat settings.
+ */
+function wp_heartbeat_set_suspension( $settings ) {
+ global $pagenow;
+
+ if ( 'post.php' === $pagenow || 'post-new.php' === $pagenow ) {
+ $settings['suspension'] = 'disable';
+ }
+
+ return $settings;
+}
+add_filter( 'heartbeat_settings', 'wp_heartbeat_set_suspension' );