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| 1 | <?php |
| 2 | declare(strict_types=1); |
| 3 | /** |
| 4 | * Pop PHP Framework (https://www.popphp.org/) |
| 5 | * |
| 6 | * @link https://github.com/popphp/popphp-framework |
| 7 | * @author Nick Sagona, III <nick@popphp.org> |
| 8 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 9 | * @license https://www.popphp.org/license New BSD License |
| 10 | */ |
| 11 | |
| 12 | /** |
| 13 | * @namespace |
| 14 | */ |
| 15 | namespace Pop\Color\Color; |
| 16 | |
| 17 | use OutOfRangeException; |
| 18 | |
| 19 | /** |
| 20 | * Pop Color Hex color class |
| 21 | * |
| 22 | * @category Pop |
| 23 | * @package Pop\Color |
| 24 | * @author Nick Sagona, III <nick@popphp.org> |
| 25 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 26 | * @license https://www.popphp.org/license New BSD License |
| 27 | * @version 2.0.0 |
| 28 | */ |
| 29 | class Hex extends AbstractColor |
| 30 | { |
| 31 | |
| 32 | /** |
| 33 | * R value |
| 34 | * @var ?string |
| 35 | */ |
| 36 | protected ?string $r = null; |
| 37 | |
| 38 | /** |
| 39 | * G value |
| 40 | * @var ?string |
| 41 | */ |
| 42 | protected ?string $g = null; |
| 43 | |
| 44 | /** |
| 45 | * B value |
| 46 | * @var ?string |
| 47 | */ |
| 48 | protected ?string $b = null; |
| 49 | |
| 50 | /** |
| 51 | * Hex value |
| 52 | * @var ?string |
| 53 | */ |
| 54 | protected ?string $hex = null; |
| 55 | |
| 56 | /** |
| 57 | * Alpha value |
| 58 | * @var ?float |
| 59 | */ |
| 60 | protected ?float $a = null; |
| 61 | |
| 62 | /** |
| 63 | * Constructor |
| 64 | * |
| 65 | * Instantiate the CSS hex color object |
| 66 | * |
| 67 | * @param string $hex |
| 68 | */ |
| 69 | public function __construct(string $hex) |
| 70 | { |
| 71 | $this->setHex($hex); |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Set hex value |
| 76 | * |
| 77 | * @param string $hex |
| 78 | * @throws OutOfRangeException |
| 79 | * @return self |
| 80 | */ |
| 81 | public function setHex(string $hex): self |
| 82 | { |
| 83 | $hex = strtolower($hex); |
| 84 | $hex = (str_starts_with($hex, '#')) ? substr($hex, 1) : $hex; |
| 85 | |
| 86 | if (!in_array(strlen($hex), [3, 4, 6, 8])) { |
| 87 | throw new OutOfRangeException('Error: The hex string was not the correct length.'); |
| 88 | } |
| 89 | if (!$this->isValid($hex)) { |
| 90 | throw new OutOfRangeException('Error: The hex string was out of range.'); |
| 91 | } |
| 92 | |
| 93 | if (strlen($hex) == 3) { |
| 94 | $this->setR(substr($hex, 0, 1)); |
| 95 | $this->setG(substr($hex, 1, 1)); |
| 96 | $this->setB(substr($hex, 2, 1)); |
| 97 | $this->a = null; |
| 98 | } else if (strlen($hex) == 4) { |
| 99 | $this->setR(substr($hex, 0, 1)); |
| 100 | $this->setG(substr($hex, 1, 1)); |
| 101 | $this->setB(substr($hex, 2, 1)); |
| 102 | $this->a = round(hexdec(str_repeat(substr($hex, 3, 1), 2)) / 255, 4); |
| 103 | } else if (strlen($hex) == 6) { |
| 104 | $this->setR(substr($hex, 0, 2)); |
| 105 | $this->setG(substr($hex, 2, 2)); |
| 106 | $this->setB(substr($hex, 4, 2)); |
| 107 | $this->a = null; |
| 108 | } else { |
| 109 | $this->setR(substr($hex, 0, 2)); |
| 110 | $this->setG(substr($hex, 2, 2)); |
| 111 | $this->setB(substr($hex, 4, 2)); |
| 112 | $this->a = round(hexdec(substr($hex, 6, 2)) / 255, 4); |
| 113 | } |
| 114 | |
| 115 | $this->hex = $hex; |
| 116 | |
| 117 | return $this; |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * Set R value |
| 122 | * |
| 123 | * @param string $r |
| 124 | * @throws OutOfRangeException |
| 125 | * @return self |
| 126 | */ |
| 127 | public function setR(string $r): self |
| 128 | { |
| 129 | if (!$this->isValid($r)) { |
| 130 | throw new OutOfRangeException('Error: The $r hex string was out of range.'); |
| 131 | } |
| 132 | $this->r = $r; |
| 133 | return $this; |
| 134 | } |
| 135 | |
| 136 | /** |
| 137 | * Set G value |
| 138 | * |
| 139 | * @param string $g |
| 140 | * @throws OutOfRangeException |
| 141 | * @return self |
| 142 | */ |
| 143 | public function setG(string $g): self |
| 144 | { |
| 145 | if (!$this->isValid($g)) { |
| 146 | throw new OutOfRangeException('Error: The $g hex string was out of range.'); |
| 147 | } |
| 148 | $this->g = $g; |
| 149 | return $this; |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * Set B value |
| 154 | * |
| 155 | * @param string $b |
| 156 | * @throws OutOfRangeException |
| 157 | * @return self |
| 158 | */ |
| 159 | public function setB(string $b): self |
| 160 | { |
| 161 | if (!$this->isValid($b)) { |
| 162 | throw new OutOfRangeException('Error: The $b hex string was out of range.'); |
| 163 | } |
| 164 | $this->b = $b; |
| 165 | return $this; |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * Set A value |
| 170 | * |
| 171 | * @param float|string $a |
| 172 | * @throws OutOfRangeException |
| 173 | * @return self |
| 174 | */ |
| 175 | public function setA(float|string $a): self |
| 176 | { |
| 177 | $a = (float)$a; |
| 178 | if (($a > 1) || ($a < 0)) { |
| 179 | throw new OutOfRangeException('Error: The value of $a must be between 0 and 1.'); |
| 180 | } |
| 181 | |
| 182 | $alphaHex = str_pad(dechex((int)round($a * 255)), 2, '0', STR_PAD_LEFT); |
| 183 | $base = (strlen($this->hex) <= 4) ? substr($this->hex, 0, 3) : substr($this->hex, 0, 6); |
| 184 | |
| 185 | if (strlen($base) == 3) { |
| 186 | $base = $base[0] . $base[0] . $base[1] . $base[1] . $base[2] . $base[2]; |
| 187 | } |
| 188 | |
| 189 | $this->setR(substr($base, 0, 2)); |
| 190 | $this->setG(substr($base, 2, 2)); |
| 191 | $this->setB(substr($base, 4, 2)); |
| 192 | |
| 193 | $this->hex = $base . $alphaHex; |
| 194 | $this->a = round(hexdec($alphaHex) / 255, 4); |
| 195 | |
| 196 | return $this; |
| 197 | } |
| 198 | |
| 199 | /** |
| 200 | * Get A value |
| 201 | * |
| 202 | * @return float|null |
| 203 | */ |
| 204 | public function getA(): float|null |
| 205 | { |
| 206 | return $this->a; |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * Determine if the color object has an alpha value |
| 211 | * |
| 212 | * @return bool |
| 213 | */ |
| 214 | public function hasA(): bool |
| 215 | { |
| 216 | return ($this->a !== null); |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * Determine if the color object has an alpha value (alias) |
| 221 | * |
| 222 | * @return bool |
| 223 | */ |
| 224 | public function hasAlpha(): bool |
| 225 | { |
| 226 | return ($this->a !== null); |
| 227 | } |
| 228 | |
| 229 | /** |
| 230 | * Get hex value |
| 231 | * |
| 232 | * @return string |
| 233 | */ |
| 234 | public function getHex(): string |
| 235 | { |
| 236 | return $this->hex; |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * Get R value |
| 241 | * |
| 242 | * @return string|null |
| 243 | */ |
| 244 | public function getR(): string|null |
| 245 | { |
| 246 | return $this->r; |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Get G value |
| 251 | * |
| 252 | * @return string|null |
| 253 | */ |
| 254 | public function getG(): string|null |
| 255 | { |
| 256 | return $this->g; |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * Get B value |
| 261 | * |
| 262 | * @return string|null |
| 263 | */ |
| 264 | public function getB(): string|null |
| 265 | { |
| 266 | return $this->b; |
| 267 | } |
| 268 | |
| 269 | /** |
| 270 | * Method to determine if the hex value is valid |
| 271 | * |
| 272 | * @param string $hex |
| 273 | * @return bool |
| 274 | */ |
| 275 | public function isValid(string $hex): bool |
| 276 | { |
| 277 | $valid = true; |
| 278 | $hexValues = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f']; |
| 279 | $hexAry = str_split($hex); |
| 280 | |
| 281 | foreach ($hexAry as $h) { |
| 282 | if (!in_array($h, $hexValues)) { |
| 283 | $valid = false; |
| 284 | break; |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | return $valid; |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * Convert to RGB |
| 293 | * |
| 294 | * @return Rgb |
| 295 | */ |
| 296 | public function toRgb(): Rgb |
| 297 | { |
| 298 | $hexR = $this->r; |
| 299 | $hexG = $this->g; |
| 300 | $hexB = $this->b; |
| 301 | |
| 302 | if (strlen($hexR) == 1) { |
| 303 | $hexR .= $hexR; |
| 304 | } |
| 305 | if (strlen($hexG) == 1) { |
| 306 | $hexG .= $hexG; |
| 307 | } |
| 308 | if (strlen($hexB) == 1) { |
| 309 | $hexB .= $hexB; |
| 310 | } |
| 311 | |
| 312 | $r = base_convert($hexR, 16, 10); |
| 313 | $g = base_convert($hexG, 16, 10); |
| 314 | $b = base_convert($hexB, 16, 10); |
| 315 | |
| 316 | return new Rgb($r, $g, $b, $this->a); |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * Convert to HSL |
| 321 | * |
| 322 | * @return Hsl |
| 323 | */ |
| 324 | public function toHsl(): Hsl |
| 325 | { |
| 326 | return $this->toRgb()->toHsl(); |
| 327 | } |
| 328 | |
| 329 | /** |
| 330 | * Convert to array |
| 331 | * |
| 332 | * @param bool $assoc |
| 333 | * @return array |
| 334 | */ |
| 335 | public function toArray(bool $assoc = true): array |
| 336 | { |
| 337 | $hex = []; |
| 338 | |
| 339 | if ($assoc) { |
| 340 | $hex['hex'] = '#' . $this->hex; |
| 341 | $hex['r'] = $this->r; |
| 342 | $hex['g'] = $this->g; |
| 343 | $hex['b'] = $this->b; |
| 344 | if ($this->a !== null) { |
| 345 | $hex['a'] = $this->a; |
| 346 | } |
| 347 | } else { |
| 348 | $hex[] = '#' . $this->hex; |
| 349 | $hex[] = $this->r; |
| 350 | $hex[] = $this->g; |
| 351 | $hex[] = $this->b; |
| 352 | if ($this->a !== null) { |
| 353 | $hex[] = $this->a; |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | return $hex; |
| 358 | } |
| 359 | |
| 360 | /** |
| 361 | * Convert to readable string |
| 362 | * |
| 363 | * @param ?string $format |
| 364 | * @return string |
| 365 | */ |
| 366 | public function render(?string $format = null): string |
| 367 | { |
| 368 | return match ($format) { |
| 369 | self::COMMA, self::PERCENT => $this->toRgb()->render($format), |
| 370 | default => '#' . $this->hex, |
| 371 | }; |
| 372 | } |
| 373 | |
| 374 | /** |
| 375 | * Return CSS-formatted string |
| 376 | * |
| 377 | * @return string |
| 378 | */ |
| 379 | public function __toString(): string |
| 380 | { |
| 381 | return $this->render(self::CSS); |
| 382 | } |
| 383 | |
| 384 | /** |
| 385 | * Get the valid channel names |
| 386 | * |
| 387 | * @return array |
| 388 | */ |
| 389 | protected function channels(): array |
| 390 | { |
| 391 | return ['r', 'g', 'b', 'hex', 'a']; |
| 392 | } |
| 393 | |
| 394 | } |