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<?php |
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/** |
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* File containing the class {@see RGBAColor_PresetsManager}. |
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* |
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* @package AppUtils |
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* @subpackage RGBAColor |
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* @see RGBAColor_PresetsManager |
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*/ |
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declare(strict_types=1); |
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namespace AppUtils; |
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/** |
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* The presets manager allows adding more presets that can |
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* then be used with the {@see RGBAColor_Presets} class to |
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* create color instances. |
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* |
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* To get the manager instance, use the factory's method: |
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* {@see RGBAColor_Factory::getPresetsManager()}. |
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* |
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* @package AppUtils |
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* @subpackage RGBAColor |
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* @author Sebastian Mordziol <[email protected]> |
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* |
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* @link https://en.wikipedia.org/wiki/List_of_colors_(compact) |
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*/ |
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class RGBAColor_PresetsManager |
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{ |
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const ERROR_CANNOT_OVERWRITE_BUILT_IN_PRESET = 94001; |
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const COLOR_WHITE = 'white'; |
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const COLOR_BLACK = 'black'; |
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const COLOR_TRANSPARENT = 'transparent'; |
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/** |
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* @var array<string,array<string,int>> |
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*/ |
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private static $globalPresets = array(); |
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/** |
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* @var bool |
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*/ |
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private static $initialized = false; |
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/** |
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* @var array<string,array<string,int>> |
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*/ |
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private $customPresets = array(); |
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public function __construct() |
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{ |
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$this->init(); |
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} |
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/** |
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* Registers the global color presets. |
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* |
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* @throws RGBAColor_Exception |
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*/ |
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private function init() : void |
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{ |
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if(self::$initialized === true) |
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{ |
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return; |
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} |
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$this |
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->registerGlobalPreset(self::COLOR_WHITE, 255, 255, 255, 255) |
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->registerGlobalPreset(self::COLOR_BLACK, 0,0,0, 255) |
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->registerGlobalPreset(self::COLOR_TRANSPARENT, 0, 0, 0, 0); |
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} |
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/** |
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* @param string $name |
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* @return int[] |
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* |
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* @throws RGBAColor_Exception |
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* @see RGBAColor::ERROR_UNKNOWN_COLOR_PRESET |
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*/ |
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public function getPreset(string $name) : array |
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{ |
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if(isset($this->customPresets[$name])) |
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{ |
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return $this->customPresets[$name]; |
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} |
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if(isset(self::$globalPresets[$name])) |
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{ |
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return self::$globalPresets[$name]; |
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} |
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throw new RGBAColor_Exception( |
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'No such color preset.', |
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sprintf( |
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'The color preset [%s] has not been registered, either as global or custom preset.', |
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$name |
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), |
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RGBAColor::ERROR_UNKNOWN_COLOR_PRESET |
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); |
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} |
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/** |
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* @param string $name |
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* @param int $red |
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* @param int $green |
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* @param int $blue |
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* @param int $alpha |
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* @return $this |
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* @throws RGBAColor_Exception |
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*/ |
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private function registerGlobalPreset(string $name, int $red, int $green, int $blue, int $alpha) : RGBAColor_PresetsManager |
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{ |
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$this->requireNotGlobal($name); |
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if(!isset(self::$globalPresets[$name])) |
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{ |
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self::$globalPresets[$name] = array( |
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RGBAColor::COMPONENT_RED => $red, |
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RGBAColor::COMPONENT_GREEN => $green, |
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RGBAColor::COMPONENT_BLUE=> $blue, |
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RGBAColor::COMPONENT_ALPHA => $alpha |
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); |
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return $this; |
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} |
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throw new RGBAColor_Exception( |
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'Cannot replace global color preset', |
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sprintf( |
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'The built-in global presets like [%s] may not be overwritten. Prefer adding a regular preset instead.', |
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$name |
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), |
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self::ERROR_CANNOT_OVERWRITE_BUILT_IN_PRESET |
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); |
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} |
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public function registerPreset(string $name, int $red, int $green, int $blue, int $alpha=255) : RGBAColor_PresetsManager |
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{ |
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$this->requireNotGlobal($name); |
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$this->customPresets[$name] = array( |
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RGBAColor::COMPONENT_RED => $red, |
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RGBAColor::COMPONENT_GREEN => $green, |
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RGBAColor::COMPONENT_BLUE=> $blue, |
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RGBAColor::COMPONENT_ALPHA => $alpha |
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); |
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return $this; |
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} |
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private function requireNotGlobal(string $name) : void |
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{ |
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if(!isset(self::$globalPresets[$name])) |
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{ |
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return; |
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} |
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throw new RGBAColor_Exception( |
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'Cannot replace global color preset', |
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sprintf( |
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'The built-in global presets like [%s] may not be overwritten.', |
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$name |
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), |
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self::ERROR_CANNOT_OVERWRITE_BUILT_IN_PRESET |
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); |
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} |
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} |
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Mistralys /
application-utils
