functions.php

<?php
/**
 * Twenty Sixteen functions and definitions
 *
 * Set up the theme and provides some helper functions, which are used in the
 * theme as custom template tags. Others are attached to action and filter
 * hooks in WordPress to change core functionality.
 *
 * When using a child theme you can override certain functions (those wrapped
 * in a function_exists() call) by defining them first in your child theme's
 * functions.php file. The child theme's functions.php file is included before
 * the parent theme's file, so the child theme functions would be used.
 *
 * @link https://codex.wordpress.org/Theme_Development
 * @link https://codex.wordpress.org/Child_Themes
 *
 * Functions that are not pluggable (not wrapped in function_exists()) are
 * instead attached to a filter or action hook.
 *
 * For more information on hooks, actions, and filters,
 * {@link https://codex.wordpress.org/Plugin_API}
 *
 * @package WordPress
 * @subpackage Twenty_Sixteen
 * @since Twenty Sixteen 1.0
 */

/**
 * Twenty Sixteen only works in WordPress 4.4 or later.
 */
if ( version_compare( $GLOBALS['wp_version'], '4.4-alpha', '<' ) ) {
	require get_template_directory() . '/inc/back-compat.php';
}

if ( ! function_exists( 'iw26_setup' ) ) :
	/**
	 * Sets up theme defaults and registers support for various WordPress features.
	 *
	 * Note that this function is hooked into the after_setup_theme hook, which
	 * runs before the init hook. The init hook is too late for some features, such
	 * as indicating support for post thumbnails.
	 *
	 * Create your own iw26_setup() function to override in a child theme.
	 *
	 * @since Twenty Sixteen 1.0
	 */
	function iw26_setup() {
		/*
		 * Make theme available for translation.
		 * Translations can be filed at WordPress.org. See: https://translate.wordpress.org/projects/wp-themes/iw26
		 * If you're building a theme based on Twenty Sixteen, use a find and replace
		 * to change 'iw26' to the name of your theme in all the template files
		 */
		load_theme_textdomain( 'iw26' );

		// Add default posts and comments RSS feed links to head.
		add_theme_support( 'automatic-feed-links' );

		add_theme_support( 'microformats2' );
		add_filter( 'semantic_linkbacks_render_comments', '__return_true' );

		/*
		 * Let WordPress manage the document title.
		 * By adding theme support, we declare that this theme does not use a
		 * hard-coded <title> tag in the document head, and expect WordPress to
		 * provide it for us.
		 */
		add_theme_support( 'title-tag' );

		/*
		 * Enable support for custom logo.
		 *
		 *  @since Twenty Sixteen 1.2
		 */
		add_theme_support(
			'custom-logo',
			array(
				'height'      => 240,
				'width'       => 240,
				'flex-height' => true,
			)
		);

		/*
		 * Enable support for Post Thumbnails on posts and pages.
		 *
		 * @link http://codex.wordpress.org/Function_Reference/add_theme_support#Post_Thumbnails
		 */
		add_theme_support( 'post-thumbnails' );
		set_post_thumbnail_size( 1200, 9999 );

		// This theme uses wp_nav_menu() in two locations.
		register_nav_menus(
			array(
				'primary' => __( 'Primary Menu', 'iw26' ),
			)
		);

		/*
		 * Switch default core markup for search form, comment form, and comments
		 * to output valid HTML5. If running classicpress, then do not call this as it is the default.
		 */
		if ( ! function_exists( 'classicpress_version' ) ) {

			add_theme_support(
				'html5',
				array(
					'search-form',
					'comment-form',
					'comment-list',
					'gallery',
					'caption',
					'style',
					'script',
					'navigation-widgets',
				)
			);
		}

		/*
		 * This theme styles the visual editor to resemble the theme style,
		 * specifically font, colors, icons, and column width.
		 */
		add_editor_style( array( 'css/editor-style.css', '' ) );

		// Load regular editor styles into the new block-based editor.
		add_theme_support( 'editor-styles' );
		// Load default block styles.
		add_theme_support( 'wp-block-styles' );
		// Add support for responsive embeds.
		add_theme_support( 'responsive-embeds' );

		// Add support for custom color scheme.
		add_theme_support(
			'editor-color-palette',
			array(
				array(
					'name'  => __( 'Dark Gray', 'iw26' ),
					'slug'  => 'dark-gray',
					'color' => '#1a1a1a',
				),
				array(
					'name'  => __( 'Medium Gray', 'iw26' ),
					'slug'  => 'medium-gray',
					'color' => '#686868',
				),
				array(
					'name'  => __( 'Light Gray', 'iw26' ),
					'slug'  => 'light-gray',
					'color' => '#e5e5e5',
				),
				array(
					'name'  => __( 'White', 'iw26' ),
					'slug'  => 'white',
					'color' => '#fff',
				),
				array(
					'name'  => __( 'Blue Gray', 'iw26' ),
					'slug'  => 'blue-gray',
					'color' => '#4d545c',
				),
				array(
					'name'  => __( 'Bright Blue', 'iw26' ),
					'slug'  => 'bright-blue',
					'color' => '#007acc',
				),
				array(
					'name'  => __( 'Light Blue', 'iw26' ),
					'slug'  => 'light-blue',
					'color' => '#9adffd',
				),
				array(
					'name'  => __( 'Dark Brown', 'iw26' ),
					'slug'  => 'dark-brown',
					'color' => '#402b30',
				),
				array(
					'name'  => __( 'Medium Brown', 'iw26' ),
					'slug'  => 'medium-brown',
					'color' => '#774e24',
				),
				array(
					'name'  => __( 'Dark Red', 'iw26' ),
					'slug'  => 'dark-red',
					'color' => '#640c1f',
				),
				array(
					'name'  => __( 'Bright Red', 'iw26' ),
					'slug'  => 'bright-red',
					'color' => '#ff675f',
				),
				array(
					'name'  => __( 'Yellow', 'iw26' ),
					'slug'  => 'yellow',
					'color' => '#ffef8e',
				),
			)
		);

		// Indicate widget sidebars can use selective refresh in the Customizer.
		add_theme_support( 'customize-selective-refresh-widgets' );

		// Add support for custom line height controls.
		add_theme_support( 'custom-line-height' );

	}
endif; // iw26_setup
add_action( 'after_setup_theme', 'iw26_setup' );

/**
 * Sets the content width in pixels, based on the theme's design and stylesheet.
 *
 * Priority 0 to make it available to lower priority callbacks.
 *
 * @global int $content_width
 *
 * @since Twenty Sixteen 1.0
 */
function iw26_content_width() {
	$GLOBALS['content_width'] = apply_filters( 'iw26_content_width', 840 );
}
add_action( 'after_setup_theme', 'iw26_content_width', 0 );

/**
 * Registers a widget area.
 *
 * @link https://developer.wordpress.org/reference/functions/register_sidebar/
 *
 * @since Twenty Sixteen 1.0
 */
function iw26_widgets_init() {
	register_sidebar(
		array(
			'name'          => __( 'Sidebar', 'iw26' ),
			'id'            => 'sidebar-1',
			'description'   => __( 'Add widgets here to appear in your sidebar.', 'iw26' ),
			'before_widget' => '<section id="%1$s" class="widget %2$s">',
			'after_widget'  => '</section>',
			'before_title'  => '<h2 class="widget-title">',
			'after_title'   => '</h2>',
		)
	);

	register_sidebar(
		array(
			'name'          => __( 'Content Bottom 1', 'iw26' ),
			'id'            => 'sidebar-2',
			'description'   => __( 'Appears at the bottom of the content on posts and pages.', 'iw26' ),
			'before_widget' => '<section id="%1$s" class="widget %2$s">',
			'after_widget'  => '</section>',
			'before_title'  => '<h2 class="widget-title">',
			'after_title'   => '</h2>',
		)
	);

	register_sidebar(
		array(
			'name'          => __( 'Content Bottom 2', 'iw26' ),
			'id'            => 'sidebar-3',
			'description'   => __( 'Appears at the bottom of the content on posts and pages.', 'iw26' ),
			'before_widget' => '<section id="%1$s" class="widget %2$s">',
			'after_widget'  => '</section>',
			'before_title'  => '<h2 class="widget-title">',
			'after_title'   => '</h2>',
		)
	);
}
add_action( 'widgets_init', 'iw26_widgets_init' );

/**
 * Handles JavaScript detection.
 *
 * Adds a `js` class to the root `<html>` element when JavaScript is detected.
 *
 * @since Twenty Sixteen 1.0
 */
function iw26_javascript_detection() {
	echo "<script>(function(html){html.className = html.className.replace(/\bno-js\b/,'js')})(document.documentElement);</script>\n";
}
add_action( 'wp_head', 'iw26_javascript_detection', 0 );

/**
 * Enqueues scripts and styles.
 *
 * @since Twenty Sixteen 1.0
 */
function iw26_scripts() {
	// Theme stylesheet.
	wp_enqueue_style( 'iw26-style', get_theme_file_uri() . '/css/default.min.css', array(), wp_get_theme()->get( 'Version' ) );

	// Theme block stylesheet.
	wp_enqueue_style( 'iw26-block-style', get_theme_file_uri() . '/css/blocks.css', array( 'iw26-style' ), wp_get_theme()->get( 'Version' ) );

	wp_enqueue_script( 'iw26-skip-link-focus-fix', get_theme_file_uri() . '/js/skip-link-focus-fix.js', array(), wp_get_theme()->get( 'Version' ), true );

	if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
		wp_enqueue_script( 'comment-reply' );
	}

	if ( is_singular() && wp_attachment_is_image() ) {
		wp_enqueue_script( 'iw26-keyboard-image-navigation', get_theme_file_uri() . '/js/keyboard-image-navigation.js', array( 'jquery' ), wp_get_theme()->get( 'Version' ) );
	}

	wp_enqueue_script( 'iw26-script', get_theme_file_uri() . '/js/functions.js', array( 'jquery' ), wp_get_theme()->get( 'Version' ), true );

	wp_localize_script(
		'iw26-script',
		'screenReaderText',
		array(
			'expand'   => __( 'expand child menu', 'iw26' ),
			'collapse' => __( 'collapse child menu', 'iw26' ),
			'icon'     => iw26_get_icon( 'expand' ),
		)
	);
}
add_action( 'wp_enqueue_scripts', 'iw26_scripts' );

/**
 * Enqueue editor styles for Gutenberg
 *
 * @since Twenty Sixteen 1.6
 */
function iw26_block_editor_styles() {
	// Block styles.
	wp_enqueue_style( 'iw26-block-editor-style', get_theme_file_uri() . '/css/editor-blocks.css' );
}
add_action( 'enqueue_block_editor_assets', 'iw26_block_editor_styles' );

/**
 * Converts a HEX value to RGB.
 *
 * @since Twenty Sixteen 1.0
 *
 * @param string $color The original color, in 3- or 6-digit hexadecimal form.
 * @return array Array containing RGB (red, green, and blue) values for the given
 *               HEX code, empty array otherwise.
 */
function iw26_hex2rgb( $color ) {
	$color = trim( $color, '#' );

	if ( strlen( $color ) === 3 ) {
		$r = hexdec( substr( $color, 0, 1 ) . substr( $color, 0, 1 ) );
		$g = hexdec( substr( $color, 1, 1 ) . substr( $color, 1, 1 ) );
		$b = hexdec( substr( $color, 2, 1 ) . substr( $color, 2, 1 ) );
	} elseif ( strlen( $color ) === 6 ) {
		$r = hexdec( substr( $color, 0, 2 ) );
		$g = hexdec( substr( $color, 2, 2 ) );
		$b = hexdec( substr( $color, 4, 2 ) );
	} else {
		return array();
	}

	return array(
		'red'   => $r,
		'green' => $g,
		'blue'  => $b,
	);
}

/**
 * Custom template tags for this theme.
 */
require get_template_directory() . '/inc/template-tags.php';

/**
* Block Patterns.
*/
require get_template_directory() . '/inc/block-patterns.php';




require get_template_directory() . '/inc/template-functions.php';

/**
 * Plugin Support
 */
require get_template_directory() . '/inc/plugin-support.php';

/**
 * Customizer additions.
 */
require get_template_directory() . '/inc/customizer.php';

/**
 * Add custom image sizes attribute to enhance responsive image functionality
 * for content images
 *
 * @since Twenty Sixteen 1.0
 *
 * @param string $sizes A source size value for use in a 'sizes' attribute.
 * @param array  $size  Image size. Accepts an array of width and height
 *                      values in pixels (in that order).
 * @return string A source size value for use in a content image 'sizes' attribute.
 */
function iw26_content_image_sizes_attr( $sizes, $size ) {
	$width = $size[0];

	840 <= $width && $sizes = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px';

	if ( 'page' === get_post_type() ) {
		840 > $width && $sizes = '(max-width: ' . $width . 'px) 85vw, ' . $width . 'px';
	} else {
		840 > $width && 600 <= $width && $sizes = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 61vw, (max-width: 1362px) 45vw, 600px';
		600 > $width && $sizes                  = '(max-width: ' . $width . 'px) 85vw, ' . $width . 'px';
	}

	return $sizes;
}
add_filter( 'wp_calculate_image_sizes', 'iw26_content_image_sizes_attr', 10, 2 );

/**
 * Add custom image sizes attribute to enhance responsive image functionality
 * for post thumbnails
 *
 * @since Twenty Sixteen 1.0
 *
 * @param array $attr Attributes for the image markup.
 * @param int   $attachment Image attachment ID.
 * @param array $size Registered image size or flat array of height and width dimensions.
 * @return string A source size value for use in a post thumbnail 'sizes' attribute.
 */
function iw26_post_thumbnail_sizes_attr( $attr, $attachment, $size ) {
	if ( 'post-thumbnail' === $size ) {
		is_active_sidebar( 'sidebar-1' ) && $attr['sizes']   = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 60vw, (max-width: 1362px) 62vw, 840px';
		! is_active_sidebar( 'sidebar-1' ) && $attr['sizes'] = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 88vw, 1200px';
		$attr['class']                                       = 'u-featured';
	}
	return $attr;
}
add_filter( 'wp_get_attachment_image_attributes', 'iw26_post_thumbnail_sizes_attr', 10, 3 );

/**
 * Modifies tag cloud widget arguments to have all tags in the widget same font size.
 *
 * @since Twenty Sixteen 1.1
 *
 * @param array $args Arguments for tag cloud widget.
 * @return array A new modified arguments.
 */
function iw26_widget_tag_cloud_args( $args ) {
	$args['largest']  = 1;
	$args['smallest'] = 1;
	$args['unit']     = 'em';
	return $args;
}
add_filter( 'widget_tag_cloud_args', 'iw26_widget_tag_cloud_args' );

/**
 * Add preconnect for Google Fonts.
 *
 * @since Twenty Sixteen 1.6
 *
 * @param array  $urls           URLs to print for resource hints.
 * @param string $relation_type  The relation type the URLs are printed.
 * @return array $urls           URLs to print for resource hints.
 */
function iw26_resource_hints( $urls, $relation_type ) {
	if ( wp_style_is( 'iw26-fonts', 'queue' ) && 'preconnect' === $relation_type ) {
		$urls[] = array(
			'href' => 'https://fonts.gstatic.com',
			'crossorigin',
		);
	}

	return $urls;
}
add_filter( 'wp_resource_hints', 'iw26_resource_hints', 10, 2 );

function iw26_set_posts_per_page_for_kind_photos( $query ) {
	if ( ! is_admin() && $query->is_main_query() && is_tax( 'kind', 'photo' ) ) {
		$query->set( 'posts_per_page', '30' );
	}
}
add_action( 'pre_get_posts', 'iw26_set_posts_per_page_for_kind_photos' );

/**
 * After the first page, do not use the front-page.php template.
 **/

function iw26_front_paged( $template ) {
	if ( is_front_page() && is_paged() ) {
		$new_template = locate_template( array( 'home.php', 'index.php' ) );
		if ( '' !== $new_template ) {
			return $new_template;
		}
	}
	return $template;
		
}
add_filter( 'template_include', 'iw26_front_paged', 99 );