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1 <?php 2 /** 3 * Twenty Sixteen functions and definitions 4 * 5 * Set up the theme and provides some helper functions, which are used in the 6 * theme as custom template tags. Others are attached to action and filter 7 * hooks in WordPress to change core functionality. 8 * 9 * When using a child theme you can override certain functions (those wrapped 10 * in a function_exists() call) by defining them first in your child theme's 11 * functions.php file. The child theme's functions.php file is included before 12 * the parent theme's file, so the child theme functions would be used. 13 * 14 * @link https://developer.wordpress.org/themes/basics/theme-functions/ 15 * @link https://developer.wordpress.org/themes/advanced-topics/child-themes/ 16 * 17 * Functions that are not pluggable (not wrapped in function_exists()) are 18 * instead attached to a filter or action hook. 19 * 20 * For more information on hooks, actions, and filters, 21 * {@link https://developer.wordpress.org/plugins/} 22 * 23 * @package WordPress 24 * @subpackage Twenty_Sixteen 25 * @since Twenty Sixteen 1.0 26 */ 27 28 /** 29 * Twenty Sixteen only works in WordPress 4.4 or later. 30 */ 31 if ( version_compare( $GLOBALS['wp_version'], '4.4-alpha', '<' ) ) { 32 require get_template_directory() . '/inc/back-compat.php'; 33 } 34 35 if ( ! function_exists( 'twentysixteen_setup' ) ) : 36 /** 37 * Sets up theme defaults and registers support for various WordPress features. 38 * 39 * Note that this function is hooked into the after_setup_theme hook, which 40 * runs before the init hook. The init hook is too late for some features, such 41 * as indicating support for post thumbnails. 42 * 43 * Create your own twentysixteen_setup() function to override in a child theme. 44 * 45 * @since Twenty Sixteen 1.0 46 */ 47 function twentysixteen_setup() { 48 /* 49 * Make theme available for translation. 50 * Translations can be filed at WordPress.org. See: https://translate.wordpress.org/projects/wp-themes/twentysixteen 51 * If you're building a theme based on Twenty Sixteen, use a find and replace 52 * to change 'twentysixteen' to the name of your theme in all the template files 53 */ 54 load_theme_textdomain( 'twentysixteen' ); 55 56 // Add default posts and comments RSS feed links to head. 57 add_theme_support( 'automatic-feed-links' ); 58 59 /* 60 * Let WordPress manage the document title. 61 * By adding theme support, we declare that this theme does not use a 62 * hard-coded <title> tag in the document head, and expect WordPress to 63 * provide it for us. 64 */ 65 add_theme_support( 'title-tag' ); 66 67 /* 68 * Enable support for custom logo. 69 * 70 * @since Twenty Sixteen 1.2 71 */ 72 add_theme_support( 73 'custom-logo', 74 array( 75 'height' => 240, 76 'width' => 240, 77 'flex-height' => true, 78 ) 79 ); 80 81 /* 82 * Enable support for Post Thumbnails on posts and pages. 83 * 84 * @link https://developer.wordpress.org/reference/functions/add_theme_support/#post-thumbnails 85 */ 86 add_theme_support( 'post-thumbnails' ); 87 set_post_thumbnail_size( 1200, 9999 ); 88 89 // This theme uses wp_nav_menu() in two locations. 90 register_nav_menus( 91 array( 92 'primary' => __( 'Primary Menu', 'twentysixteen' ), 93 'social' => __( 'Social Links Menu', 'twentysixteen' ), 94 ) 95 ); 96 97 /* 98 * Switch default core markup for search form, comment form, and comments 99 * to output valid HTML5. 100 */ 101 add_theme_support( 102 'html5', 103 array( 104 'search-form', 105 'comment-form', 106 'comment-list', 107 'gallery', 108 'caption', 109 'script', 110 'style', 111 'navigation-widgets', 112 ) 113 ); 114 115 /* 116 * Enable support for Post Formats. 117 * 118 * See: https://wordpress.org/support/article/post-formats/ 119 */ 120 add_theme_support( 121 'post-formats', 122 array( 123 'aside', 124 'image', 125 'video', 126 'quote', 127 'link', 128 'gallery', 129 'status', 130 'audio', 131 'chat', 132 ) 133 ); 134 135 /* 136 * This theme styles the visual editor to resemble the theme style, 137 * specifically font, colors, icons, and column width. 138 */ 139 add_editor_style( array( 'css/editor-style.css', twentysixteen_fonts_url() ) ); 140 141 // Load regular editor styles into the new block-based editor. 142 add_theme_support( 'editor-styles' ); 143 144 // Load default block styles. 145 add_theme_support( 'wp-block-styles' ); 146 147 // Add support for responsive embeds. 148 add_theme_support( 'responsive-embeds' ); 149 150 // Add support for custom color scheme. 151 add_theme_support( 152 'editor-color-palette', 153 array( 154 array( 155 'name' => __( 'Dark Gray', 'twentysixteen' ), 156 'slug' => 'dark-gray', 157 'color' => '#1a1a1a', 158 ), 159 array( 160 'name' => __( 'Medium Gray', 'twentysixteen' ), 161 'slug' => 'medium-gray', 162 'color' => '#686868', 163 ), 164 array( 165 'name' => __( 'Light Gray', 'twentysixteen' ), 166 'slug' => 'light-gray', 167 'color' => '#e5e5e5', 168 ), 169 array( 170 'name' => __( 'White', 'twentysixteen' ), 171 'slug' => 'white', 172 'color' => '#fff', 173 ), 174 array( 175 'name' => __( 'Blue Gray', 'twentysixteen' ), 176 'slug' => 'blue-gray', 177 'color' => '#4d545c', 178 ), 179 array( 180 'name' => __( 'Bright Blue', 'twentysixteen' ), 181 'slug' => 'bright-blue', 182 'color' => '#007acc', 183 ), 184 array( 185 'name' => __( 'Light Blue', 'twentysixteen' ), 186 'slug' => 'light-blue', 187 'color' => '#9adffd', 188 ), 189 array( 190 'name' => __( 'Dark Brown', 'twentysixteen' ), 191 'slug' => 'dark-brown', 192 'color' => '#402b30', 193 ), 194 array( 195 'name' => __( 'Medium Brown', 'twentysixteen' ), 196 'slug' => 'medium-brown', 197 'color' => '#774e24', 198 ), 199 array( 200 'name' => __( 'Dark Red', 'twentysixteen' ), 201 'slug' => 'dark-red', 202 'color' => '#640c1f', 203 ), 204 array( 205 'name' => __( 'Bright Red', 'twentysixteen' ), 206 'slug' => 'bright-red', 207 'color' => '#ff675f', 208 ), 209 array( 210 'name' => __( 'Yellow', 'twentysixteen' ), 211 'slug' => 'yellow', 212 'color' => '#ffef8e', 213 ), 214 ) 215 ); 216 217 // Indicate widget sidebars can use selective refresh in the Customizer. 218 add_theme_support( 'customize-selective-refresh-widgets' ); 219 220 // Add support for custom line height controls. 221 add_theme_support( 'custom-line-height' ); 222 } 223 endif; // twentysixteen_setup() 224 add_action( 'after_setup_theme', 'twentysixteen_setup' ); 225 226 /** 227 * Sets the content width in pixels, based on the theme's design and stylesheet. 228 * 229 * Priority 0 to make it available to lower priority callbacks. 230 * 231 * @global int $content_width 232 * 233 * @since Twenty Sixteen 1.0 234 */ 235 function twentysixteen_content_width() { 236 $GLOBALS['content_width'] = apply_filters( 'twentysixteen_content_width', 840 ); 237 } 238 add_action( 'after_setup_theme', 'twentysixteen_content_width', 0 ); 239 240 /** 241 * Add preconnect for Google Fonts. 242 * 243 * @since Twenty Sixteen 1.6 244 * 245 * @param array $urls URLs to print for resource hints. 246 * @param string $relation_type The relation type the URLs are printed. 247 * @return array URLs to print for resource hints. 248 */ 249 function twentysixteen_resource_hints( $urls, $relation_type ) { 250 if ( wp_style_is( 'twentysixteen-fonts', 'queue' ) && 'preconnect' === $relation_type ) { 251 $urls[] = array( 252 'href' => 'https://fonts.gstatic.com', 253 'crossorigin', 254 ); 255 } 256 257 return $urls; 258 } 259 add_filter( 'wp_resource_hints', 'twentysixteen_resource_hints', 10, 2 ); 260 261 /** 262 * Registers a widget area. 263 * 264 * @link https://developer.wordpress.org/reference/functions/register_sidebar/ 265 * 266 * @since Twenty Sixteen 1.0 267 */ 268 function twentysixteen_widgets_init() { 269 register_sidebar( 270 array( 271 'name' => __( 'Sidebar', 'twentysixteen' ), 272 'id' => 'sidebar-1', 273 'description' => __( 'Add widgets here to appear in your sidebar.', 'twentysixteen' ), 274 'before_widget' => '<section id="%1$s" class="widget %2$s">', 275 'after_widget' => '</section>', 276 'before_title' => '<h2 class="widget-title">', 277 'after_title' => '</h2>', 278 ) 279 ); 280 281 register_sidebar( 282 array( 283 'name' => __( 'Content Bottom 1', 'twentysixteen' ), 284 'id' => 'sidebar-2', 285 'description' => __( 'Appears at the bottom of the content on posts and pages.', 'twentysixteen' ), 286 'before_widget' => '<section id="%1$s" class="widget %2$s">', 287 'after_widget' => '</section>', 288 'before_title' => '<h2 class="widget-title">', 289 'after_title' => '</h2>', 290 ) 291 ); 292 293 register_sidebar( 294 array( 295 'name' => __( 'Content Bottom 2', 'twentysixteen' ), 296 'id' => 'sidebar-3', 297 'description' => __( 'Appears at the bottom of the content on posts and pages.', 'twentysixteen' ), 298 'before_widget' => '<section id="%1$s" class="widget %2$s">', 299 'after_widget' => '</section>', 300 'before_title' => '<h2 class="widget-title">', 301 'after_title' => '</h2>', 302 ) 303 ); 304 } 305 add_action( 'widgets_init', 'twentysixteen_widgets_init' ); 306 307 if ( ! function_exists( 'twentysixteen_fonts_url' ) ) : 308 /** 309 * Register Google fonts for Twenty Sixteen. 310 * 311 * Create your own twentysixteen_fonts_url() function to override in a child theme. 312 * 313 * @since Twenty Sixteen 1.0 314 * 315 * @return string Google fonts URL for the theme. 316 */ 317 function twentysixteen_fonts_url() { 318 $fonts_url = ''; 319 $fonts = array(); 320 $subsets = 'latin,latin-ext'; 321 322 /* 323 * translators: If there are characters in your language that are not supported 324 * by Merriweather, translate this to 'off'. Do not translate into your own language. 325 */ 326 if ( 'off' !== _x( 'on', 'Merriweather font: on or off', 'twentysixteen' ) ) { 327 $fonts[] = 'Merriweather:400,700,900,400italic,700italic,900italic'; 328 } 329 330 /* 331 * translators: If there are characters in your language that are not supported 332 * by Montserrat, translate this to 'off'. Do not translate into your own language. 333 */ 334 if ( 'off' !== _x( 'on', 'Montserrat font: on or off', 'twentysixteen' ) ) { 335 $fonts[] = 'Montserrat:400,700'; 336 } 337 338 /* 339 * translators: If there are characters in your language that are not supported 340 * by Inconsolata, translate this to 'off'. Do not translate into your own language. 341 */ 342 if ( 'off' !== _x( 'on', 'Inconsolata font: on or off', 'twentysixteen' ) ) { 343 $fonts[] = 'Inconsolata:400'; 344 } 345 346 if ( $fonts ) { 347 $fonts_url = add_query_arg( 348 array( 349 'family' => urlencode( implode( '|', $fonts ) ), 350 'subset' => urlencode( $subsets ), 351 'display' => urlencode( 'fallback' ), 352 ), 353 'https://fonts.googleapis.com/css' 354 ); 355 } 356 357 return $fonts_url; 358 } 359 endif; 360 361 /** 362 * Handles JavaScript detection. 363 * 364 * Adds a `js` class to the root `<html>` element when JavaScript is detected. 365 * 366 * @since Twenty Sixteen 1.0 367 */ 368 function twentysixteen_javascript_detection() { 369 echo "<script>(function(html){html.className = html.className.replace(/\bno-js\b/,'js')})(document.documentElement);</script>\n"; 370 } 371 add_action( 'wp_head', 'twentysixteen_javascript_detection', 0 ); 372 373 /** 374 * Enqueues scripts and styles. 375 * 376 * @since Twenty Sixteen 1.0 377 */ 378 function twentysixteen_scripts() { 379 // Add custom fonts, used in the main stylesheet. 380 wp_enqueue_style( 'twentysixteen-fonts', twentysixteen_fonts_url(), array(), null ); 381 382 // Add Genericons, used in the main stylesheet. 383 wp_enqueue_style( 'genericons', get_template_directory_uri() . '/genericons/genericons.css', array(), '20201208' ); 384 385 // Theme stylesheet. 386 wp_enqueue_style( 'twentysixteen-style', get_stylesheet_uri(), array(), '20201208' ); 387 388 // Theme block stylesheet. 389 wp_enqueue_style( 'twentysixteen-block-style', get_template_directory_uri() . '/css/blocks.css', array( 'twentysixteen-style' ), '20190102' ); 390 391 // Load the Internet Explorer specific stylesheet. 392 wp_enqueue_style( 'twentysixteen-ie', get_template_directory_uri() . '/css/ie.css', array( 'twentysixteen-style' ), '20170530' ); 393 wp_style_add_data( 'twentysixteen-ie', 'conditional', 'lt IE 10' ); 394 395 // Load the Internet Explorer 8 specific stylesheet. 396 wp_enqueue_style( 'twentysixteen-ie8', get_template_directory_uri() . '/css/ie8.css', array( 'twentysixteen-style' ), '20170530' ); 397 wp_style_add_data( 'twentysixteen-ie8', 'conditional', 'lt IE 9' ); 398 399 // Load the Internet Explorer 7 specific stylesheet. 400 wp_enqueue_style( 'twentysixteen-ie7', get_template_directory_uri() . '/css/ie7.css', array( 'twentysixteen-style' ), '20170530' ); 401 wp_style_add_data( 'twentysixteen-ie7', 'conditional', 'lt IE 8' ); 402 403 // Load the html5 shiv. 404 wp_enqueue_script( 'twentysixteen-html5', get_template_directory_uri() . '/js/html5.js', array(), '3.7.3' ); 405 wp_script_add_data( 'twentysixteen-html5', 'conditional', 'lt IE 9' ); 406 407 wp_enqueue_script( 'twentysixteen-skip-link-focus-fix', get_template_directory_uri() . '/js/skip-link-focus-fix.js', array(), '20170530', true ); 408 409 if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) { 410 wp_enqueue_script( 'comment-reply' ); 411 } 412 413 if ( is_singular() && wp_attachment_is_image() ) { 414 wp_enqueue_script( 'twentysixteen-keyboard-image-navigation', get_template_directory_uri() . '/js/keyboard-image-navigation.js', array( 'jquery' ), '20170530' ); 415 } 416 417 wp_enqueue_script( 'twentysixteen-script', get_template_directory_uri() . '/js/functions.js', array( 'jquery' ), '20181217', true ); 418 419 wp_localize_script( 420 'twentysixteen-script', 421 'screenReaderText', 422 array( 423 'expand' => __( 'expand child menu', 'twentysixteen' ), 424 'collapse' => __( 'collapse child menu', 'twentysixteen' ), 425 ) 426 ); 427 } 428 add_action( 'wp_enqueue_scripts', 'twentysixteen_scripts' ); 429 430 /** 431 * Enqueue styles for the block-based editor. 432 * 433 * @since Twenty Sixteen 1.6 434 */ 435 function twentysixteen_block_editor_styles() { 436 // Block styles. 437 wp_enqueue_style( 'twentysixteen-block-editor-style', get_template_directory_uri() . '/css/editor-blocks.css', array(), '20201208' ); 438 // Add custom fonts. 439 wp_enqueue_style( 'twentysixteen-fonts', twentysixteen_fonts_url(), array(), null ); 440 } 441 add_action( 'enqueue_block_editor_assets', 'twentysixteen_block_editor_styles' ); 442 443 /** 444 * Adds custom classes to the array of body classes. 445 * 446 * @since Twenty Sixteen 1.0 447 * 448 * @param array $classes Classes for the body element. 449 * @return array (Maybe) filtered body classes. 450 */ 451 function twentysixteen_body_classes( $classes ) { 452 // Adds a class of custom-background-image to sites with a custom background image. 453 if ( get_background_image() ) { 454 $classes[] = 'custom-background-image'; 455 } 456 457 // Adds a class of group-blog to sites with more than 1 published author. 458 if ( is_multi_author() ) { 459 $classes[] = 'group-blog'; 460 } 461 462 // Adds a class of no-sidebar to sites without active sidebar. 463 if ( ! is_active_sidebar( 'sidebar-1' ) ) { 464 $classes[] = 'no-sidebar'; 465 } 466 467 // Adds a class of hfeed to non-singular pages. 468 if ( ! is_singular() ) { 469 $classes[] = 'hfeed'; 470 } 471 472 return $classes; 473 } 474 add_filter( 'body_class', 'twentysixteen_body_classes' ); 475 476 /** 477 * Converts a HEX value to RGB. 478 * 479 * @since Twenty Sixteen 1.0 480 * 481 * @param string $color The original color, in 3- or 6-digit hexadecimal form. 482 * @return array Array containing RGB (red, green, and blue) values for the given 483 * HEX code, empty array otherwise. 484 */ 485 function twentysixteen_hex2rgb( $color ) { 486 $color = trim( $color, '#' ); 487 488 if ( strlen( $color ) === 3 ) { 489 $r = hexdec( substr( $color, 0, 1 ) . substr( $color, 0, 1 ) ); 490 $g = hexdec( substr( $color, 1, 1 ) . substr( $color, 1, 1 ) ); 491 $b = hexdec( substr( $color, 2, 1 ) . substr( $color, 2, 1 ) ); 492 } elseif ( strlen( $color ) === 6 ) { 493 $r = hexdec( substr( $color, 0, 2 ) ); 494 $g = hexdec( substr( $color, 2, 2 ) ); 495 $b = hexdec( substr( $color, 4, 2 ) ); 496 } else { 497 return array(); 498 } 499 500 return array( 501 'red' => $r, 502 'green' => $g, 503 'blue' => $b, 504 ); 505 } 506 507 /** 508 * Custom template tags for this theme. 509 */ 510 require get_template_directory() . '/inc/template-tags.php'; 511 512 /** 513 * Block Patterns. 514 */ 515 require get_template_directory() . '/inc/block-patterns.php'; 516 517 /** 518 * Customizer additions. 519 */ 520 require get_template_directory() . '/inc/customizer.php'; 521 522 /** 523 * Add custom image sizes attribute to enhance responsive image functionality 524 * for content images 525 * 526 * @since Twenty Sixteen 1.0 527 * 528 * @param string $sizes A source size value for use in a 'sizes' attribute. 529 * @param array $size Image size. Accepts an array of width and height 530 * values in pixels (in that order). 531 * @return string A source size value for use in a content image 'sizes' attribute. 532 */ 533 function twentysixteen_content_image_sizes_attr( $sizes, $size ) { 534 $width = $size[0]; 535 536 if ( 840 <= $width ) { 537 $sizes = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px'; 538 } 539 540 if ( 'page' === get_post_type() ) { 541 if ( 840 > $width ) { 542 $sizes = '(max-width: ' . $width . 'px) 85vw, ' . $width . 'px'; 543 } 544 } else { 545 if ( 840 > $width && 600 <= $width ) { 546 $sizes = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 61vw, (max-width: 1362px) 45vw, 600px'; 547 } elseif ( 600 > $width ) { 548 $sizes = '(max-width: ' . $width . 'px) 85vw, ' . $width . 'px'; 549 } 550 } 551 552 return $sizes; 553 } 554 add_filter( 'wp_calculate_image_sizes', 'twentysixteen_content_image_sizes_attr', 10, 2 ); 555 556 /** 557 * Add custom image sizes attribute to enhance responsive image functionality 558 * for post thumbnails 559 * 560 * @since Twenty Sixteen 1.0 561 * 562 * @param string[] $attr Array of attribute values for the image markup, keyed by attribute name. 563 * See wp_get_attachment_image(). 564 * @param WP_Post $attachment Image attachment post. 565 * @param string|int[] $size Requested image size. Can be any registered image size name, or 566 * an array of width and height values in pixels (in that order). 567 * @return string[] The filtered attributes for the image markup. 568 */ 569 function twentysixteen_post_thumbnail_sizes_attr( $attr, $attachment, $size ) { 570 if ( 'post-thumbnail' === $size ) { 571 if ( is_active_sidebar( 'sidebar-1' ) ) { 572 $attr['sizes'] = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 60vw, (max-width: 1362px) 62vw, 840px'; 573 } else { 574 $attr['sizes'] = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 88vw, 1200px'; 575 } 576 } 577 return $attr; 578 } 579 add_filter( 'wp_get_attachment_image_attributes', 'twentysixteen_post_thumbnail_sizes_attr', 10, 3 ); 580 581 /** 582 * Modifies tag cloud widget arguments to display all tags in the same font size 583 * and use list format for better accessibility. 584 * 585 * @since Twenty Sixteen 1.1 586 * 587 * @param array $args Arguments for tag cloud widget. 588 * @return array The filtered arguments for tag cloud widget. 589 */ 590 function twentysixteen_widget_tag_cloud_args( $args ) { 591 $args['largest'] = 1; 592 $args['smallest'] = 1; 593 $args['unit'] = 'em'; 594 $args['format'] = 'list'; 595 596 return $args; 597 } 598 add_filter( 'widget_tag_cloud_args', 'twentysixteen_widget_tag_cloud_args' );
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