Animations.php
1 month ago
BackButton.php
7 months ago
BeforeAfter.php
1 month ago
BlockPatterns.php
4 months ago
Carousel.php
1 week ago
ColumnsSameHeight.php
1 week ago
ContainerEdgeAlignment.php
4 weeks ago
Counter.php
1 month ago
DownloadButton.php
1 week ago
Events.php
4 weeks ago
FaqSchema.php
1 week ago
FluidTypography.php
4 weeks ago
Gallery.php
8 months ago
GravityFormsInline.php
1 month ago
Headline.php
4 weeks ago
InsertPost.php
1 month ago
ProductCategories.php
4 weeks ago
ReadingProgress.php
7 months ago
ReadingTime.php
8 months ago
ShapeAnimations.php
4 weeks ago
StackedImages.php
4 months ago
StickyColumn.php
4 weeks ago
SvgUpload.php
4 weeks ago
Testimonials.php
8 months ago
TextAnimation.php
1 month ago
UserText.php
4 weeks ago
FluidTypography.php
279 lines
| 1 | <?php |
| 2 | /** |
| 3 | * Fluid Typography module for FrontBlocks. |
| 4 | * |
| 5 | * @package FrontBlocks |
| 6 | * @author David Perez <david@close.technology> |
| 7 | * @copyright 2025 Closemarketing |
| 8 | * @version 1.0 |
| 9 | */ |
| 10 | |
| 11 | namespace FrontBlocks\Frontend; |
| 12 | |
| 13 | defined( 'ABSPATH' ) || exit; |
| 14 | |
| 15 | /** |
| 16 | * FluidTypography class. |
| 17 | * |
| 18 | * @since 1.0.0 |
| 19 | */ |
| 20 | class FluidTypography { |
| 21 | |
| 22 | /** |
| 23 | * Constructor. |
| 24 | */ |
| 25 | public function __construct() { |
| 26 | if ( ! $this->is_enabled() ) { |
| 27 | return; |
| 28 | } |
| 29 | |
| 30 | $this->init_hooks(); |
| 31 | } |
| 32 | |
| 33 | /** |
| 34 | * Check if module is enabled. |
| 35 | * |
| 36 | * @return bool |
| 37 | */ |
| 38 | private function is_enabled() { |
| 39 | $options = get_option( 'frontblocks_settings', array() ); |
| 40 | return (bool) ( $options['enable_fluid_typography'] ?? true ); |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * Initialize hooks. |
| 45 | * |
| 46 | * @return void |
| 47 | */ |
| 48 | private function init_hooks() { |
| 49 | add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_fluid_typography' ), 999 ); |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Enqueue fluid typography styles. |
| 54 | * |
| 55 | * @return void |
| 56 | */ |
| 57 | public function enqueue_fluid_typography() { |
| 58 | $source_css = $this->get_source_css(); |
| 59 | |
| 60 | if ( empty( $source_css ) ) { |
| 61 | return; |
| 62 | } |
| 63 | |
| 64 | $fluid_css = $this->convert_to_fluid_typography( $source_css ); |
| 65 | |
| 66 | if ( current_user_can( 'manage_options' ) && isset( $_GET['frbl_debug'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended |
| 67 | add_action( |
| 68 | 'wp_head', |
| 69 | function () use ( $fluid_css ) { |
| 70 | echo "\n<!-- FRBL Fluid Typography DEBUG:\n" . esc_html( $fluid_css ) . "\n-->\n"; |
| 71 | } |
| 72 | ); |
| 73 | } |
| 74 | |
| 75 | if ( empty( $fluid_css ) ) { |
| 76 | return; |
| 77 | } |
| 78 | |
| 79 | $style_handle = $this->get_style_handle(); |
| 80 | wp_add_inline_style( $style_handle, $fluid_css ); |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Get CSS source depending on active theme. |
| 85 | * Priority: GeneratePress → theme.json global stylesheet → theme stylesheet. |
| 86 | * |
| 87 | * @return string |
| 88 | */ |
| 89 | private function get_source_css(): string { |
| 90 | // 1. GeneratePress — use its pre-compiled dynamic CSS cache. |
| 91 | if ( function_exists( 'generate_get_default_color_palettes' ) ) { |
| 92 | $gp_css = get_option( 'generate_dynamic_css_output', '' ); |
| 93 | if ( ! empty( $gp_css ) ) { |
| 94 | return $gp_css; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | // 2. Block/FSE themes — compile from theme.json via WP core. |
| 99 | if ( function_exists( 'wp_get_global_stylesheet' ) ) { |
| 100 | $global_css = wp_get_global_stylesheet(); |
| 101 | if ( ! empty( $global_css ) ) { |
| 102 | return $global_css; |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | // 3. Classic themes — read the theme's style.css. |
| 107 | $stylesheet = get_stylesheet_directory() . '/style.css'; |
| 108 | if ( file_exists( $stylesheet ) ) { |
| 109 | $css = file_get_contents( $stylesheet ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents |
| 110 | if ( ! empty( $css ) ) { |
| 111 | return $css; |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | return ''; |
| 116 | } |
| 117 | |
| 118 | /** |
| 119 | * Return the registered style handle to attach the fluid CSS to. |
| 120 | * Falls back to 'wp-block-library' (always enqueued) if the theme handle isn't found. |
| 121 | * |
| 122 | * @return string |
| 123 | */ |
| 124 | private function get_style_handle(): string { |
| 125 | // GeneratePress. |
| 126 | if ( wp_style_is( 'generate-style', 'enqueued' ) ) { |
| 127 | return 'generate-style'; |
| 128 | } |
| 129 | |
| 130 | // Common theme handles. |
| 131 | $candidates = array( 'parent-style', 'child-style', 'theme-style', 'main-style', get_stylesheet() ); |
| 132 | foreach ( $candidates as $handle ) { |
| 133 | if ( wp_style_is( $handle, 'enqueued' ) ) { |
| 134 | return $handle; |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | // Universal fallback — always present when blocks are used. |
| 139 | return 'wp-block-library'; |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * Convert source CSS to fluid typography using clamp(). |
| 144 | * |
| 145 | * @param string $css Source CSS. |
| 146 | * @return string Fluid typography CSS. |
| 147 | */ |
| 148 | private function convert_to_fluid_typography( $css ) { |
| 149 | $fluid_css = ''; |
| 150 | $selectors = array( 'body', 'p', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6' ); |
| 151 | |
| 152 | $is_generateblocks = class_exists( 'GenerateBlocks' ); |
| 153 | |
| 154 | foreach ( $selectors as $selector ) { |
| 155 | $fluid_rule = $this->extract_and_convert_selector( $css, $selector, $is_generateblocks ); |
| 156 | |
| 157 | if ( ! empty( $fluid_rule ) ) { |
| 158 | $fluid_css .= $fluid_rule . "\n"; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | return $fluid_css; |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Extract font sizes from CSS and convert to fluid typography. |
| 167 | * |
| 168 | * @param string $css Source CSS. |
| 169 | * @param string $selector CSS selector (e.g. 'h1'). |
| 170 | * @param bool $is_generateblocks Whether GenerateBlocks is active. |
| 171 | * @return string Fluid CSS rule or empty string. |
| 172 | */ |
| 173 | private function extract_and_convert_selector( $css, $selector, $is_generateblocks = false ) { |
| 174 | $sizes = array( |
| 175 | 'desktop' => null, |
| 176 | 'tablet' => null, |
| 177 | 'mobile' => null, |
| 178 | ); |
| 179 | |
| 180 | $is_multiple_selector = ( 'body' === $selector ); |
| 181 | |
| 182 | // Desktop font-size. |
| 183 | if ( $is_multiple_selector ) { |
| 184 | $pattern = '/(?:^|,|\})\s*[^{]*\b' . preg_quote( $selector, '/' ) . '\b[^{]*\{[^}]*font-size:\s*([0-9.]+)(px|rem|em)/i'; |
| 185 | } else { |
| 186 | $pattern = '/' . preg_quote( $selector, '/' ) . '\s*\{[^}]*font-size:\s*([0-9.]+)(px|rem|em)/i'; |
| 187 | } |
| 188 | |
| 189 | if ( preg_match( $pattern, $css, $matches ) ) { |
| 190 | $sizes['desktop'] = array( |
| 191 | 'value' => floatval( $matches[1] ), |
| 192 | 'unit' => $matches[2], |
| 193 | ); |
| 194 | } |
| 195 | |
| 196 | // Tablet font-size — @media (max-width: 1024px). |
| 197 | if ( $is_multiple_selector ) { |
| 198 | $pattern_tablet = '/@media[^{]*max-width:\s*1024px[^{]*\{[^@]*\b' . preg_quote( $selector, '/' ) . '\b[^{]*\{[^}]*font-size:\s*([0-9.]+)(px|rem|em)/is'; |
| 199 | } else { |
| 200 | $pattern_tablet = '/@media[^{]*max-width:\s*1024px[^{]*\{[^}]*' . preg_quote( $selector, '/' ) . '\s*\{[^}]*font-size:\s*([0-9.]+)(px|rem|em)/is'; |
| 201 | } |
| 202 | |
| 203 | if ( preg_match( $pattern_tablet, $css, $matches ) ) { |
| 204 | $sizes['tablet'] = array( |
| 205 | 'value' => floatval( $matches[1] ), |
| 206 | 'unit' => $matches[2], |
| 207 | ); |
| 208 | } |
| 209 | |
| 210 | // Mobile font-size — @media (max-width: 768px). |
| 211 | if ( $is_multiple_selector ) { |
| 212 | $pattern_mobile = '/@media[^{]*max-width:\s*768px[^{]*\{[^@]*\b' . preg_quote( $selector, '/' ) . '\b[^{]*\{[^}]*font-size:\s*([0-9.]+)(px|rem|em)/is'; |
| 213 | } else { |
| 214 | $pattern_mobile = '/@media[^{]*max-width:\s*768px[^{]*\{[^}]*' . preg_quote( $selector, '/' ) . '\s*\{[^}]*font-size:\s*([0-9.]+)(px|rem|em)/is'; |
| 215 | } |
| 216 | |
| 217 | if ( preg_match( $pattern_mobile, $css, $matches ) ) { |
| 218 | $sizes['mobile'] = array( |
| 219 | 'value' => floatval( $matches[1] ), |
| 220 | 'unit' => $matches[2], |
| 221 | ); |
| 222 | } |
| 223 | |
| 224 | if ( ! $sizes['desktop'] || ! $sizes['mobile'] ) { |
| 225 | return ''; |
| 226 | } |
| 227 | |
| 228 | if ( $sizes['desktop']['unit'] !== $sizes['mobile']['unit'] ) { |
| 229 | return ''; |
| 230 | } |
| 231 | |
| 232 | $min_size = $sizes['mobile']['value']; |
| 233 | $max_size = $sizes['desktop']['value']; |
| 234 | $unit = $sizes['desktop']['unit']; |
| 235 | |
| 236 | if ( $min_size === $max_size ) { |
| 237 | return ''; |
| 238 | } |
| 239 | |
| 240 | $viewport_start = 320; |
| 241 | $viewport_end = 1440; |
| 242 | $viewport_diff = $viewport_end - $viewport_start; |
| 243 | |
| 244 | $fluid_calc = sprintf( |
| 245 | 'calc(%1$s%2$s + (%3$s - %1$s) * ((100vw - %4$spx) / %5$s))', |
| 246 | $min_size, |
| 247 | $unit, |
| 248 | $max_size, |
| 249 | $viewport_start, |
| 250 | $viewport_diff |
| 251 | ); |
| 252 | |
| 253 | $clamp_rule = sprintf( |
| 254 | 'clamp(%1$s%2$s, %3$s, %4$s%2$s)', |
| 255 | $min_size, |
| 256 | $unit, |
| 257 | $fluid_calc, |
| 258 | $max_size |
| 259 | ); |
| 260 | |
| 261 | if ( in_array( $selector, array( 'h1', 'h2', 'h3', 'h4', 'h5', 'h6' ), true ) ) { |
| 262 | $rule = sprintf( "body %s {\n\tfont-size: %s !important;\n}", $selector, $clamp_rule ); |
| 263 | |
| 264 | // Add GenerateBlocks-specific selector only when GB is active. |
| 265 | if ( $is_generateblocks ) { |
| 266 | $rule .= sprintf( "\nbody %s.gb-headline {\n\tfont-size: %s !important;\n}", $selector, $clamp_rule ); |
| 267 | } |
| 268 | } else { |
| 269 | $rule = sprintf( "%s {\n\tfont-size: %s !important;\n}", $selector, $clamp_rule ); |
| 270 | |
| 271 | if ( 'body' === $selector && $is_generateblocks ) { |
| 272 | $rule .= sprintf( "\np.gb-headline-text {\n\tfont-size: %s !important;\n}", $clamp_rule ); |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | return $rule; |
| 277 | } |
| 278 | } |
| 279 |