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1 <?php 2 /** 3 * Functions which enhance the theme by hooking into WordPress 4 * 5 * @package WordPress 6 * @subpackage Twenty_Twenty_One 7 * @since Twenty Twenty-One 1.0 8 */ 9 10 /** 11 * Adds custom classes to the array of body classes. 12 * 13 * @since Twenty Twenty-One 1.0 14 * 15 * @param array $classes Classes for the body element. 16 * @return array 17 */ 18 function twenty_twenty_one_body_classes( $classes ) { 19 20 // Helps detect if JS is enabled or not. 21 $classes[] = 'no-js'; 22 23 // Adds `singular` to singular pages, and `hfeed` to all other pages. 24 $classes[] = is_singular() ? 'singular' : 'hfeed'; 25 26 // Add a body class if main navigation is active. 27 if ( has_nav_menu( 'primary' ) ) { 28 $classes[] = 'has-main-navigation'; 29 } 30 31 // Add a body class if there are no footer widgets. 32 if ( ! is_active_sidebar( 'sidebar-1' ) ) { 33 $classes[] = 'no-widgets'; 34 } 35 36 return $classes; 37 } 38 add_filter( 'body_class', 'twenty_twenty_one_body_classes' ); 39 40 /** 41 * Adds custom class to the array of posts classes. 42 * 43 * @since Twenty Twenty-One 1.0 44 * 45 * @param array $classes An array of CSS classes. 46 * @return array 47 */ 48 function twenty_twenty_one_post_classes( $classes ) { 49 $classes[] = 'entry'; 50 51 return $classes; 52 } 53 add_filter( 'post_class', 'twenty_twenty_one_post_classes', 10, 3 ); 54 55 /** 56 * Add a pingback url auto-discovery header for single posts, pages, or attachments. 57 * 58 * @since Twenty Twenty-One 1.0 59 * 60 * @return void 61 */ 62 function twenty_twenty_one_pingback_header() { 63 if ( is_singular() && pings_open() ) { 64 echo '<link rel="pingback" href="', esc_url( get_bloginfo( 'pingback_url' ) ), '">'; 65 } 66 } 67 add_action( 'wp_head', 'twenty_twenty_one_pingback_header' ); 68 69 /** 70 * Remove the `no-js` class from body if JS is supported. 71 * 72 * @since Twenty Twenty-One 1.0 73 * 74 * @return void 75 */ 76 function twenty_twenty_one_supports_js() { 77 echo '<script>document.body.classList.remove("no-js");</script>'; 78 } 79 add_action( 'wp_footer', 'twenty_twenty_one_supports_js' ); 80 81 /** 82 * Changes comment form default fields. 83 * 84 * @since Twenty Twenty-One 1.0 85 * 86 * @param array $defaults The form defaults. 87 * @return array 88 */ 89 function twenty_twenty_one_comment_form_defaults( $defaults ) { 90 91 // Adjust height of comment form. 92 $defaults['comment_field'] = preg_replace( '/rows="\d+"/', 'rows="5"', $defaults['comment_field'] ); 93 94 return $defaults; 95 } 96 add_filter( 'comment_form_defaults', 'twenty_twenty_one_comment_form_defaults' ); 97 98 /** 99 * Determines if post thumbnail can be displayed. 100 * 101 * @since Twenty Twenty-One 1.0 102 * 103 * @return bool 104 */ 105 function twenty_twenty_one_can_show_post_thumbnail() { 106 /** 107 * Filters whether post thumbnail can be displayed. 108 * 109 * @since Twenty Twenty-One 1.0 110 * 111 * @param bool $show_post_thumbnail Whether to show post thumbnail. 112 */ 113 return apply_filters( 114 'twenty_twenty_one_can_show_post_thumbnail', 115 ! post_password_required() && ! is_attachment() && has_post_thumbnail() 116 ); 117 } 118 119 /** 120 * Returns the size for avatars used in the theme. 121 * 122 * @since Twenty Twenty-One 1.0 123 * 124 * @return int 125 */ 126 function twenty_twenty_one_get_avatar_size() { 127 return 60; 128 } 129 130 /** 131 * Creates continue reading text. 132 * 133 * @since Twenty Twenty-One 1.0 134 */ 135 function twenty_twenty_one_continue_reading_text() { 136 $continue_reading = sprintf( 137 /* translators: %s: Post title. Only visible to screen readers. */ 138 esc_html__( 'Continue reading %s', 'twentytwentyone' ), 139 the_title( '<span class="screen-reader-text">', '</span>', false ) 140 ); 141 142 return $continue_reading; 143 } 144 145 /** 146 * Creates the continue reading link for excerpt. 147 * 148 * @since Twenty Twenty-One 1.0 149 */ 150 function twenty_twenty_one_continue_reading_link_excerpt() { 151 if ( ! is_admin() ) { 152 return '… <a class="more-link" href="' . esc_url( get_permalink() ) . '">' . twenty_twenty_one_continue_reading_text() . '</a>'; 153 } 154 } 155 156 // Filter the excerpt more link. 157 add_filter( 'excerpt_more', 'twenty_twenty_one_continue_reading_link_excerpt' ); 158 159 /** 160 * Creates the continue reading link. 161 * 162 * @since Twenty Twenty-One 1.0 163 */ 164 function twenty_twenty_one_continue_reading_link() { 165 if ( ! is_admin() ) { 166 return '<div class="more-link-container"><a class="more-link" href="' . esc_url( get_permalink() ) . '#more-' . esc_attr( get_the_ID() ) . '">' . twenty_twenty_one_continue_reading_text() . '</a></div>'; 167 } 168 } 169 170 // Filter the content more link. 171 add_filter( 'the_content_more_link', 'twenty_twenty_one_continue_reading_link' ); 172 173 if ( ! function_exists( 'twenty_twenty_one_post_title' ) ) { 174 /** 175 * Adds a title to posts and pages that are missing titles. 176 * 177 * @since Twenty Twenty-One 1.0 178 * 179 * @param string $title The title. 180 * @return string 181 */ 182 function twenty_twenty_one_post_title( $title ) { 183 return '' === $title ? esc_html_x( 'Untitled', 'Added to posts and pages that are missing titles', 'twentytwentyone' ) : $title; 184 } 185 } 186 add_filter( 'the_title', 'twenty_twenty_one_post_title' ); 187 188 /** 189 * Gets the SVG code for a given icon. 190 * 191 * @since Twenty Twenty-One 1.0 192 * 193 * @param string $group The icon group. 194 * @param string $icon The icon. 195 * @param int $size The icon size in pixels. 196 * @return string 197 */ 198 function twenty_twenty_one_get_icon_svg( $group, $icon, $size = 24 ) { 199 return Twenty_Twenty_One_SVG_Icons::get_svg( $group, $icon, $size ); 200 } 201 202 /** 203 * Changes the default navigation arrows to svg icons 204 * 205 * @since Twenty Twenty-One 1.0 206 * 207 * @param string $calendar_output The generated HTML of the calendar. 208 * @return string 209 */ 210 function twenty_twenty_one_change_calendar_nav_arrows( $calendar_output ) { 211 $calendar_output = str_replace( '« ', is_rtl() ? twenty_twenty_one_get_icon_svg( 'ui', 'arrow_right' ) : twenty_twenty_one_get_icon_svg( 'ui', 'arrow_left' ), $calendar_output ); 212 $calendar_output = str_replace( ' »', is_rtl() ? twenty_twenty_one_get_icon_svg( 'ui', 'arrow_left' ) : twenty_twenty_one_get_icon_svg( 'ui', 'arrow_right' ), $calendar_output ); 213 return $calendar_output; 214 } 215 add_filter( 'get_calendar', 'twenty_twenty_one_change_calendar_nav_arrows' ); 216 217 /** 218 * Get custom CSS. 219 * 220 * Return CSS for non-latin language, if available, or null 221 * 222 * @since Twenty Twenty-One 1.0 223 * 224 * @param string $type Whether to return CSS for the "front-end", "block-editor", or "classic-editor". 225 * @return string 226 */ 227 function twenty_twenty_one_get_non_latin_css( $type = 'front-end' ) { 228 229 // Fetch site locale. 230 $locale = get_bloginfo( 'language' ); 231 232 /** 233 * Filters the fallback fonts for non-latin languages. 234 * 235 * @since Twenty Twenty-One 1.0 236 * 237 * @param array $font_family An array of locales and font families. 238 */ 239 $font_family = apply_filters( 240 'twenty_twenty_one_get_localized_font_family_types', 241 array( 242 243 // Arabic. 244 'ar' => array( 'Tahoma', 'Arial', 'sans-serif' ), 245 'ary' => array( 'Tahoma', 'Arial', 'sans-serif' ), 246 'azb' => array( 'Tahoma', 'Arial', 'sans-serif' ), 247 'ckb' => array( 'Tahoma', 'Arial', 'sans-serif' ), 248 'fa-IR' => array( 'Tahoma', 'Arial', 'sans-serif' ), 249 'haz' => array( 'Tahoma', 'Arial', 'sans-serif' ), 250 'ps' => array( 'Tahoma', 'Arial', 'sans-serif' ), 251 252 // Chinese Simplified (China) - Noto Sans SC. 253 'zh-CN' => array( '\'PingFang SC\'', '\'Helvetica Neue\'', '\'Microsoft YaHei New\'', '\'STHeiti Light\'', 'sans-serif' ), 254 255 // Chinese Traditional (Taiwan) - Noto Sans TC. 256 'zh-TW' => array( '\'PingFang TC\'', '\'Helvetica Neue\'', '\'Microsoft YaHei New\'', '\'STHeiti Light\'', 'sans-serif' ), 257 258 // Chinese (Hong Kong) - Noto Sans HK. 259 'zh-HK' => array( '\'PingFang HK\'', '\'Helvetica Neue\'', '\'Microsoft YaHei New\'', '\'STHeiti Light\'', 'sans-serif' ), 260 261 // Cyrillic. 262 'bel' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 263 'bg-BG' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 264 'kk' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 265 'mk-MK' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 266 'mn' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 267 'ru-RU' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 268 'sah' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 269 'sr-RS' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 270 'tt-RU' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 271 'uk' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 272 273 // Devanagari. 274 'bn-BD' => array( 'Arial', 'sans-serif' ), 275 'hi-IN' => array( 'Arial', 'sans-serif' ), 276 'mr' => array( 'Arial', 'sans-serif' ), 277 'ne-NP' => array( 'Arial', 'sans-serif' ), 278 279 // Greek. 280 'el' => array( '\'Helvetica Neue\', Helvetica, Arial, sans-serif' ), 281 282 // Gujarati. 283 'gu' => array( 'Arial', 'sans-serif' ), 284 285 // Hebrew. 286 'he-IL' => array( '\'Arial Hebrew\'', 'Arial', 'sans-serif' ), 287 288 // Japanese. 289 'ja' => array( 'sans-serif' ), 290 291 // Korean. 292 'ko-KR' => array( '\'Apple SD Gothic Neo\'', '\'Malgun Gothic\'', '\'Nanum Gothic\'', 'Dotum', 'sans-serif' ), 293 294 // Thai. 295 'th' => array( '\'Sukhumvit Set\'', '\'Helvetica Neue\'', 'Helvetica', 'Arial', 'sans-serif' ), 296 297 // Vietnamese. 298 'vi' => array( '\'Libre Franklin\'', 'sans-serif' ), 299 300 ) 301 ); 302 303 // Return if the selected language has no fallback fonts. 304 if ( empty( $font_family[ $locale ] ) ) { 305 return ''; 306 } 307 308 /** 309 * Filters the elements to apply fallback fonts to. 310 * 311 * @since Twenty Twenty-One 1.0 312 * 313 * @param array $elements An array of elements for "front-end", "block-editor", or "classic-editor". 314 */ 315 $elements = apply_filters( 316 'twenty_twenty_one_get_localized_font_family_elements', 317 array( 318 'front-end' => array( 'body', 'input', 'textarea', 'button', '.button', '.faux-button', '.wp-block-button__link', '.wp-block-file__button', '.has-drop-cap:not(:focus)::first-letter', '.entry-content .wp-block-archives', '.entry-content .wp-block-categories', '.entry-content .wp-block-cover-image', '.entry-content .wp-block-latest-comments', '.entry-content .wp-block-latest-posts', '.entry-content .wp-block-pullquote', '.entry-content .wp-block-quote.is-large', '.entry-content .wp-block-quote.is-style-large', '.entry-content .wp-block-archives *', '.entry-content .wp-block-categories *', '.entry-content .wp-block-latest-posts *', '.entry-content .wp-block-latest-comments *', '.entry-content p', '.entry-content ol', '.entry-content ul', '.entry-content dl', '.entry-content dt', '.entry-content cite', '.entry-content figcaption', '.entry-content .wp-caption-text', '.comment-content p', '.comment-content ol', '.comment-content ul', '.comment-content dl', '.comment-content dt', '.comment-content cite', '.comment-content figcaption', '.comment-content .wp-caption-text', '.widget_text p', '.widget_text ol', '.widget_text ul', '.widget_text dl', '.widget_text dt', '.widget-content .rssSummary', '.widget-content cite', '.widget-content figcaption', '.widget-content .wp-caption-text' ), 319 'block-editor' => array( '.editor-styles-wrapper > *', '.editor-styles-wrapper p', '.editor-styles-wrapper ol', '.editor-styles-wrapper ul', '.editor-styles-wrapper dl', '.editor-styles-wrapper dt', '.editor-post-title__block .editor-post-title__input', '.editor-styles-wrapper .wp-block h1', '.editor-styles-wrapper .wp-block h2', '.editor-styles-wrapper .wp-block h3', '.editor-styles-wrapper .wp-block h4', '.editor-styles-wrapper .wp-block h5', '.editor-styles-wrapper .wp-block h6', '.editor-styles-wrapper .has-drop-cap:not(:focus)::first-letter', '.editor-styles-wrapper cite', '.editor-styles-wrapper figcaption', '.editor-styles-wrapper .wp-caption-text' ), 320 'classic-editor' => array( 'body#tinymce.wp-editor', 'body#tinymce.wp-editor p', 'body#tinymce.wp-editor ol', 'body#tinymce.wp-editor ul', 'body#tinymce.wp-editor dl', 'body#tinymce.wp-editor dt', 'body#tinymce.wp-editor figcaption', 'body#tinymce.wp-editor .wp-caption-text', 'body#tinymce.wp-editor .wp-caption-dd', 'body#tinymce.wp-editor cite', 'body#tinymce.wp-editor table' ), 321 ) 322 ); 323 324 // Return if the specified type doesn't exist. 325 if ( empty( $elements[ $type ] ) ) { 326 return ''; 327 } 328 329 // Include file if function doesn't exist. 330 if ( ! function_exists( 'twenty_twenty_one_generate_css' ) ) { 331 require_once get_theme_file_path( 'inc/custom-css.php' ); // phpcs:ignore WPThemeReview.CoreFunctionality.FileInclude.FileIncludeFound 332 } 333 334 // Return the specified styles. 335 return twenty_twenty_one_generate_css( // @phpstan-ignore-line. 336 implode( ',', $elements[ $type ] ), 337 'font-family', 338 implode( ',', $font_family[ $locale ] ), 339 null, 340 null, 341 false 342 ); 343 } 344 345 /** 346 * Print the first instance of a block in the content, and then break away. 347 * 348 * @since Twenty Twenty-One 1.0 349 * 350 * @param string $block_name The full block type name, or a partial match. 351 * Example: `core/image`, `core-embed/*`. 352 * @param string|null $content The content to search in. Use null for get_the_content(). 353 * @param int $instances How many instances of the block will be printed (max). Default 1. 354 * @return bool Returns true if a block was located & printed, otherwise false. 355 */ 356 function twenty_twenty_one_print_first_instance_of_block( $block_name, $content = null, $instances = 1 ) { 357 $instances_count = 0; 358 $blocks_content = ''; 359 360 if ( ! $content ) { 361 $content = get_the_content(); 362 } 363 364 // Parse blocks in the content. 365 $blocks = parse_blocks( $content ); 366 367 // Loop blocks. 368 foreach ( $blocks as $block ) { 369 370 // Sanity check. 371 if ( ! isset( $block['blockName'] ) ) { 372 continue; 373 } 374 375 // Check if this the block matches the $block_name. 376 $is_matching_block = false; 377 378 // If the block ends with *, try to match the first portion. 379 if ( '*' === $block_name[-1] ) { 380 $is_matching_block = 0 === strpos( $block['blockName'], rtrim( $block_name, '*' ) ); 381 } else { 382 $is_matching_block = $block_name === $block['blockName']; 383 } 384 385 if ( $is_matching_block ) { 386 // Increment count. 387 $instances_count++; 388 389 // Add the block HTML. 390 $blocks_content .= render_block( $block ); 391 392 // Break the loop if the $instances count was reached. 393 if ( $instances_count >= $instances ) { 394 break; 395 } 396 } 397 } 398 399 if ( $blocks_content ) { 400 /** This filter is documented in wp-includes/post-template.php */ 401 echo apply_filters( 'the_content', $blocks_content ); // phpcs:ignore WordPress.Security.EscapeOutput 402 return true; 403 } 404 405 return false; 406 } 407 408 /** 409 * Retrieve protected post password form content. 410 * 411 * @since Twenty Twenty-One 1.0 412 * @since Twenty Twenty-One 1.4 Corrected parameter name for `$output`, 413 * added the `$post` parameter. 414 * 415 * @param string $output The password form HTML output. 416 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post. 417 * @return string HTML content for password form for password protected post. 418 */ 419 function twenty_twenty_one_password_form( $output, $post = 0 ) { 420 $post = get_post( $post ); 421 $label = 'pwbox-' . ( empty( $post->ID ) ? wp_rand() : $post->ID ); 422 $output = '<p class="post-password-message">' . esc_html__( 'This content is password protected. Please enter a password to view.', 'twentytwentyone' ) . '</p> 423 <form action="' . esc_url( site_url( 'wp-login.php?action=postpass', 'login_post' ) ) . '" class="post-password-form" method="post"> 424 <label class="post-password-form__label" for="' . esc_attr( $label ) . '">' . esc_html_x( 'Password', 'Post password form', 'twentytwentyone' ) . '</label><input class="post-password-form__input" name="post_password" id="' . esc_attr( $label ) . '" type="password" size="20" /><input type="submit" class="post-password-form__submit" name="' . esc_attr_x( 'Submit', 'Post password form', 'twentytwentyone' ) . '" value="' . esc_attr_x( 'Enter', 'Post password form', 'twentytwentyone' ) . '" /></form> 425 '; 426 return $output; 427 } 428 add_filter( 'the_password_form', 'twenty_twenty_one_password_form', 10, 2 ); 429 430 /** 431 * Filters the list of attachment image attributes. 432 * 433 * @since Twenty Twenty-One 1.0 434 * 435 * @param string[] $attr Array of attribute values for the image markup, keyed by attribute name. 436 * See wp_get_attachment_image(). 437 * @param WP_Post $attachment Image attachment post. 438 * @param string|int[] $size Requested image size. Can be any registered image size name, or 439 * an array of width and height values in pixels (in that order). 440 * @return string[] The filtered attributes for the image markup. 441 */ 442 function twenty_twenty_one_get_attachment_image_attributes( $attr, $attachment, $size ) { 443 444 if ( is_admin() ) { 445 return $attr; 446 } 447 448 if ( isset( $attr['class'] ) && false !== strpos( $attr['class'], 'custom-logo' ) ) { 449 return $attr; 450 } 451 452 $width = false; 453 $height = false; 454 455 if ( is_array( $size ) ) { 456 $width = (int) $size[0]; 457 $height = (int) $size[1]; 458 } elseif ( $attachment && is_object( $attachment ) && $attachment->ID ) { 459 $meta = wp_get_attachment_metadata( $attachment->ID ); 460 if ( isset( $meta['width'] ) && isset( $meta['height'] ) ) { 461 $width = (int) $meta['width']; 462 $height = (int) $meta['height']; 463 } 464 } 465 466 if ( $width && $height ) { 467 468 // Add style. 469 $attr['style'] = isset( $attr['style'] ) ? $attr['style'] : ''; 470 $attr['style'] = 'width:100%;height:' . round( 100 * $height / $width, 2 ) . '%;max-width:' . $width . 'px;' . $attr['style']; 471 } 472 473 return $attr; 474 } 475 add_filter( 'wp_get_attachment_image_attributes', 'twenty_twenty_one_get_attachment_image_attributes', 10, 3 );
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