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<?php |
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/** |
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* responsive-images-css |
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* |
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* @category Jkphl |
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* @package Jkphl\Respimgcss |
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* @subpackage Jkphl\Respimgcss\Infrastructure |
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* @author Joschi Kuphal <[email protected]> / @jkphl |
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* @copyright Copyright © 2018 Joschi Kuphal <[email protected]> / @jkphl |
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* @license http://opensource.org/licenses/MIT The MIT License (MIT) |
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*/ |
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/*********************************************************************************** |
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* The MIT License (MIT) |
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* |
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* Copyright © 2018 Joschi Kuphal <[email protected]> / @jkphl |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy of |
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* this software and associated documentation files (the "Software"), to deal in |
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* the Software without restriction, including without limitation the rights to |
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of |
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* the Software, and to permit persons to whom the Software is furnished to do so, |
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* subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in all |
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* copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS |
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR |
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER |
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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***********************************************************************************/ |
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namespace Jkphl\Respimgcss\Infrastructure; |
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use Jkphl\Respimgcss\Application\Contract\ImageCandidateSetInterface; |
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use Jkphl\Respimgcss\Application\Contract\UnitLengthInterface; |
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use Jkphl\Respimgcss\Application\Factory\ImageCandidateFactory; |
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use Jkphl\Respimgcss\Application\Factory\LengthFactory; |
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use Jkphl\Respimgcss\Application\Model\ImageCandidateSet; |
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use Jkphl\Respimgcss\Application\Service\CssRulesetCompilerService; |
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use Jkphl\Respimgcss\Domain\Contract\ImageCandidateInterface; |
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use Jkphl\Respimgcss\Ports\CssRulesetInterface; |
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use Jkphl\Respimgcss\Ports\GeneratorInterface; |
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/** |
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* Responsive image CSS generator (internal) |
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* |
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* @package Jkphl\Respimgcss |
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* @subpackage Jkphl\Respimgcss\Ports |
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*/ |
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abstract class Generator implements GeneratorInterface |
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{ |
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/** |
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* Breakpoints |
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* |
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* @var UnitLengthInterface[] |
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*/ |
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protected $breakPoints; |
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/** |
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* EM to pixel ratio |
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* |
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* @var int |
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*/ |
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protected $emPixel; |
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/** |
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* Image candidates |
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* |
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* @var ImageCandidateSet |
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*/ |
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protected $imageCandidates = null; |
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/** |
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* Generator constructor |
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* |
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* @param string[] $breakPoints List of breakpoint length strings |
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* @param int $emPixel EM to pixel ratio |
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*/ |
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public function __construct(array $breakPoints, int $emPixel) |
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{ |
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$this->emPixel = $emPixel; |
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$this->breakPoints = array_map( |
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[LengthFactory::class, 'createLengthFromString'], |
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$breakPoints, |
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array_fill(0, count($breakPoints), $this->emPixel) |
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); |
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} |
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/** |
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* Register an image candidate |
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* |
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* @param string $file Image candidate file path and name |
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* @param string|null $descriptor Image candidate descriptor |
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* |
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* @return GeneratorInterface Self reference |
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* @api |
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*/ |
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public function registerImageCandidate(string $file, string $descriptor = null): GeneratorInterface |
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{ |
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$imageCandidate = ($descriptor === null) ? |
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ImageCandidateFactory::createImageCandidateFromString($file) : |
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ImageCandidateFactory::createImageCandidateFromFileAndDescriptor($file, $descriptor); |
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// If the image candidate set doesn't exist yet |
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if (!($this->imageCandidates instanceof ImageCandidateSetInterface)) { |
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$this->imageCandidates = new ImageCandidateSet($imageCandidate); |
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return $this; |
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} |
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// Register the image candidate |
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$this->imageCandidates[] = $imageCandidate; |
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return $this; |
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} |
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/** |
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* Return the registered image candidates |
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* @return ImageCandidateInterface[] Image candidates |
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*/ |
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public function getImageCandidates(): array |
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{ |
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return ($this->imageCandidates instanceof ImageCandidateSetInterface) ? |
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$this->imageCandidates->toArray() : []; |
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} |
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/** |
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* Create a CSS rulset for the registered image candidates |
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* |
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* @param float[] $densities Device display densities |
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* |
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* @return CssRulesetInterface CSS Ruleset |
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*/ |
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public function make(array $densities = [1]): CssRulesetInterface |
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{ |
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$cssRuleset = new \Jkphl\Respimgcss\Ports\CssRuleset(); |
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// If all necessary properties are given |
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if (count($this->breakPoints) && count($this->imageCandidates) && count($densities)) { |
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// Instantiate a CSS ruleset compiler service and compile for all densities |
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$cssRulesetCompilerService = new CssRulesetCompilerService( |
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$cssRuleset, |
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$this->breakPoints, |
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$this->imageCandidates |
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); |
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$cssRuleset = $cssRulesetCompilerService->compile($densities); |
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} |
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return $cssRuleset; |
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} |
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} |
jkphl /
responsive-images-css
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