<?php 
/** 
 * WordPress Options Administration API. 
 * 
 * @package WordPress 
 * @subpackage Administration 
 * @since 4.4.0 
 */ 
 
/** 
 * Output JavaScript to toggle display of additional settings if avatars are disabled. 
 * 
 * @since 4.2.0 
 */ 
function options_discussion_add_js() { 
    ?> 
    <script> 
    (function($){ 
        var parent = $( '#show_avatars' ), 
            children = $( '.avatar-settings' ); 
        parent.on( 'change', function(){ 
            children.toggleClass( 'hide-if-js', ! this.checked ); 
        }); 
    })(jQuery); 
    </script> 
    <?php 
} 
 
/** 
 * Display JavaScript on the page. 
 * 
 * @since 3.5.0 
 */ 
function options_general_add_js() { 
    ?> 
<script type="text/javascript"> 
    jQuery( function($) { 
        var $siteName = $( '#wp-admin-bar-site-name' ).children( 'a' ).first(), 
            $siteIconPreview = $('#site-icon-preview-site-title'), 
            homeURL = ( <?php echo wp_json_encode( get_home_url() ); ?> || '' ).replace( /^(https?:\/\/)?(www\.)?/, '' ); 
 
        $( '#blogname' ).on( 'input', function() { 
            var title = $.trim( $( this ).val() ) || homeURL; 
 
            // Truncate to 40 characters. 
            if ( 40 < title.length ) { 
                title = title.substring( 0, 40 ) + '\u2026'; 
            } 
 
            $siteName.text( title ); 
            $siteIconPreview.text( title ); 
        }); 
 
        $( 'input[name="date_format"]' ).on( 'click', function() { 
            if ( 'date_format_custom_radio' !== $(this).attr( 'id' ) ) 
                $( 'input[name="date_format_custom"]' ).val( $( this ).val() ).closest( 'fieldset' ).find( '.example' ).text( $( this ).parent( 'label' ).children( '.format-i18n' ).text() ); 
        }); 
 
        $( 'input[name="date_format_custom"]' ).on( 'click input', function() { 
            $( '#date_format_custom_radio' ).prop( 'checked', true ); 
        }); 
 
        $( 'input[name="time_format"]' ).on( 'click', function() { 
            if ( 'time_format_custom_radio' !== $(this).attr( 'id' ) ) 
                $( 'input[name="time_format_custom"]' ).val( $( this ).val() ).closest( 'fieldset' ).find( '.example' ).text( $( this ).parent( 'label' ).children( '.format-i18n' ).text() ); 
        }); 
 
        $( 'input[name="time_format_custom"]' ).on( 'click input', function() { 
            $( '#time_format_custom_radio' ).prop( 'checked', true ); 
        }); 
 
        $( 'input[name="date_format_custom"], input[name="time_format_custom"]' ).on( 'input', function() { 
            var format = $( this ), 
                fieldset = format.closest( 'fieldset' ), 
                example = fieldset.find( '.example' ), 
                spinner = fieldset.find( '.spinner' ); 
 
            // Debounce the event callback while users are typing. 
            clearTimeout( $.data( this, 'timer' ) ); 
            $( this ).data( 'timer', setTimeout( function() { 
                // If custom date is not empty. 
                if ( format.val() ) { 
                    spinner.addClass( 'is-active' ); 
 
                    $.post( ajaxurl, { 
                        action: 'date_format_custom' === format.attr( 'name' ) ? 'date_format' : 'time_format', 
                        date     : format.val() 
                    }, function( d ) { spinner.removeClass( 'is-active' ); example.text( d ); } ); 
                } 
            }, 500 ) ); 
        } ); 
 
        var languageSelect = $( '#WPLANG' ); 
        $( 'form' ).on( 'submit', function() { 
            /* 
             * Don't show a spinner for English and installed languages, 
             * as there is nothing to download. 
             */ 
            if ( ! languageSelect.find( 'option:selected' ).data( 'installed' ) ) { 
                $( '#submit', this ).after( '<span class="spinner language-install-spinner is-active" />' ); 
            } 
        }); 
    } ); 
</script> 
    <?php 
} 
 
/** 
 * Display JavaScript on the page. 
 * 
 * @since 3.5.0 
 */ 
function options_reading_add_js() { 
    ?> 
<script type="text/javascript"> 
    jQuery( function($) { 
        var section = $('#front-static-pages'), 
            staticPage = section.find('input:radio[value="page"]'), 
            selects = section.find('select'), 
            check_disabled = function(){ 
                selects.prop( 'disabled', ! staticPage.prop('checked') ); 
            }; 
        check_disabled(); 
        section.find( 'input:radio' ).on( 'change', check_disabled ); 
    } ); 
</script> 
    <?php 
} 
 
/** 
 * Render the site charset setting. 
 * 
 * @since 3.5.0 
 */ 
function options_reading_blog_charset() { 
    echo '<input name="blog_charset" type="text" id="blog_charset" value="' . esc_attr( get_option( 'blog_charset' ) ) . '" class="regular-text" />'; 
    echo '<p class="description">' . __( 'The <a href="https://wordpress.org/documentation/article/wordpress-glossary/#character-set">character encoding</a> of your site (UTF-8 is recommended)' ) . '</p>'; 
} 
 
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