<?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>';

}