ColorPicker.php

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<?php
declare(strict_types=1);

namespace Magento\Ui\Component\Form\Element;

use Magento\Ui\Model\ColorPicker\ColorModesProvider;
use Magento\Framework\View\Element\UiComponentFactory;
use Magento\Framework\View\Element\UiComponentInterface;
use Magento\Framework\View\Element\UiComponent\ContextInterface;

class ColorPicker extends AbstractElement
{
    const NAME = 'colorPicker';

    const DEFAULT_MODE = 'full';

    private $modesProvider;

    public function __construct(
        ContextInterface $context,
        ColorModesProvider $modesProvider,
        array $components = [],
        array $data = []
    ) {
        $this->modesProvider = $modesProvider;
        parent::__construct($context, $components, $data);
    }

    public function getComponentName(): string
    {
        return static::NAME;
    }

    public function prepare() : void
    {
        $modes = $this->modesProvider->getModes();
        $colorPickerModeSetting = $this->getData('config/colorPickerMode');
        $colorFormatSetting = $this->getData('config/colorFormat');
        $colorPickerMode = $modes[$colorPickerModeSetting] ?? $modes[self::DEFAULT_MODE];
        $colorPickerMode['preferredFormat'] = $colorFormatSetting;
        $this->_data['config']['colorPickerConfig'] = $colorPickerMode;

        parent::prepare();
    }
}