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<?php |
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namespace projectcleverweb\color; |
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class css { |
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/** |
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* Force alpha value to be present where possible. |
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* @var boolean |
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*/ |
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public static $force_alpha = FALSE; |
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/** |
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* Choose the best way to represent the color as a CSS value. Will use either |
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* a hex or rgba value depending on the alpha value. |
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* |
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* @param mixed $color The color |
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* @return string The CSS value |
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*/ |
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public static function best($color) { |
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static::_color_instance($color); |
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if ($color->alpha == 1.0 && !static::$force_alpha) { |
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return static::hex($color->rgb['r'], $color->rgb['g'], $color->rgb['b']); |
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} |
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return static::rgb($color->rgb['r'], $color->rgb['g'], $color->rgb['b'], $color->alpha); |
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} |
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/** |
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* Force $color to be an instance of color |
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* |
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* @param mixed &$color The color |
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* @return void |
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*/ |
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protected static function _color_instance(&$color) { |
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if (!is_a($color, __CLASS__)) { |
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$color = new color($color); |
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} |
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} |
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/** |
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* Convert and RGB value to a CSS hex string |
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* |
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* @param float $r The red value |
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* @param float $g The green value |
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* @param float $b The blue value |
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* @return string The CSS string |
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*/ |
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public static function hex(float $r, float $g, float $b) { |
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return '#'.generate::rgb_to_hex($r, $g, $b); |
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} |
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/** |
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* Convert and RGB value to a CSS rgb or rgba string |
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* |
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* @param float $r The red value |
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* @param float $g The green value |
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* @param float $b The blue value |
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* @return string The CSS string |
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*/ |
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public static function rgb(float $r, float $g, float $b, float $a = 1.0) { |
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if ($a == 1.0 && !static::$force_alpha) { |
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return sprintf('rgb(%s,%s,%s)', $r, $g, $b); |
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} |
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return sprintf('rgba(%s,%s,%s,%s)', $r, $g, $b, $a); |
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} |
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/** |
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* Convert and HSL value to a CSS hsl or hsla string |
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* |
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* @param float $h The hue value |
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* @param float $s The saturation value |
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* @param float $l The light value |
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* @return string The CSS string |
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*/ |
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public static function hsl(float $h, float $s, float $l, float $a = 1.0) { |
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if ($a == 1.0 && !static::$force_alpha) { |
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return sprintf('hsl(%s,%s,%s)', $h, $s, $l); |
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} |
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return sprintf('hsla(%s,%s,%s,%s)', $h, $s, $l, $a); |
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} |
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} |
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ProjectCleverWeb /
PHP-Color
