LayoutDefinition.php

<?php

namespace Drupal\Core\Layout;

use Drupal\Component\Plugin\Definition\DerivablePluginDefinitionInterface;
use Drupal\Component\Plugin\Definition\PluginDefinitionInterface;
use Drupal\Component\Plugin\Definition\PluginDefinition;
use Drupal\Core\Plugin\Definition\DependentPluginDefinitionInterface;
use Drupal\Core\Plugin\Definition\DependentPluginDefinitionTrait;

/**
 * Provides an implementation of a layout definition and its metadata.
 */
class LayoutDefinition extends PluginDefinition implements PluginDefinitionInterface, DerivablePluginDefinitionInterface, DependentPluginDefinitionInterface {
    use DependentPluginDefinitionTrait;
    
    /**
     * The name of the deriver of this layout definition, if any.
     *
     * @var string|null
     */
    protected $deriver;
    
    /**
     * The human-readable name.
     *
     * @var string
     */
    protected $label;
    
    /**
     * An optional description for advanced layouts.
     *
     * @var string
     */
    protected $description;
    
    /**
     * The human-readable category.
     *
     * @var string
     */
    protected $category;
    
    /**
     * The template file to render this layout (relative to the 'path' given).
     *
     * @var string|null
     */
    protected $template;
    
    /**
     * The path to the template.
     *
     * @var string
     */
    protected $templatePath;
    
    /**
     * The theme hook used to render this layout.
     *
     * @var string|null
     */
    protected $theme_hook;
    
    /**
     * Path (relative to the module or theme) to resources like icon or template.
     *
     * @var string
     */
    protected $path;
    
    /**
     * The asset library.
     *
     * @var string|null
     */
    protected $library;
    
    /**
     * The path to the preview image.
     *
     * @var string
     */
    protected $icon;
    
    /**
     * An array defining the regions of a layout.
     *
     * @var string[][]|null
     *
     * @see \Drupal\Core\Layout\Icon\IconBuilderInterface::build()
     */
    protected $icon_map;
    
    /**
     * An associative array of regions in this layout.
     *
     * The key of the array is the machine name of the region, and the value is
     * an associative array with the following keys:
     * - label: (string) The human-readable name of the region.
     *
     * Any remaining keys may have special meaning for the given layout plugin,
     * but are undefined here.
     *
     * @var array
     */
    protected $regions = [];
    
    /**
     * The default region.
     *
     * @var string
     */
    protected $default_region;
    
    /**
     * Any additional properties and values.
     *
     * @var array
     */
    protected $additional = [];
    
    /**
     * LayoutDefinition constructor.
     *
     * @param array $definition
     *   An array of values from the annotation.
     */
    public function __construct(array $definition) {
        foreach ($definition as $property => $value) {
            $this->set($property, $value);
        }
    }
    
    /**
     * Gets any arbitrary property.
     *
     * @param string $property
     *   The property to retrieve.
     *
     * @return mixed
     *   The value for that property, or NULL if the property does not exist.
     */
    public function get($property) {
        if (property_exists($this, $property)) {
            $value = isset($this->{$property}) ? $this->{$property} : NULL;
        }
        else {
            $value = isset($this->additional[$property]) ? $this->additional[$property] : NULL;
        }
        return $value;
    }
    
    /**
     * Sets a value to an arbitrary property.
     *
     * @param string $property
     *   The property to use for the value.
     * @param mixed $value
     *   The value to set.
     *
     * @return $this
     */
    public function set($property, $value) {
        if (property_exists($this, $property)) {
            $this->{$property} = $value;
        }
        else {
            $this->additional[$property] = $value;
        }
        return $this;
    }
    
    /**
     * Gets the human-readable name of the layout definition.
     *
     * @return string|\Drupal\Core\StringTranslation\TranslatableMarkup
     *   The human-readable name of the layout definition.
     */
    public function getLabel() {
        return $this->label;
    }
    
    /**
     * Sets the human-readable name of the layout definition.
     *
     * @param string|\Drupal\Core\StringTranslation\TranslatableMarkup $label
     *   The human-readable name of the layout definition.
     *
     * @return $this
     */
    public function setLabel($label) {
        $this->label = $label;
        return $this;
    }
    
    /**
     * Gets the description of the layout definition.
     *
     * @return string|\Drupal\Core\StringTranslation\TranslatableMarkup
     *   The description of the layout definition.
     */
    public function getDescription() {
        return $this->description;
    }
    
    /**
     * Sets the description of the layout definition.
     *
     * @param string|\Drupal\Core\StringTranslation\TranslatableMarkup $description
     *   The description of the layout definition.
     *
     * @return $this
     */
    public function setDescription($description) {
        $this->description = $description;
        return $this;
    }
    
    /**
     * Gets the human-readable category of the layout definition.
     *
     * @return string|\Drupal\Core\StringTranslation\TranslatableMarkup
     *   The human-readable category of the layout definition.
     */
    public function getCategory() {
        return $this->category;
    }
    
    /**
     * Sets the human-readable category of the layout definition.
     *
     * @param string|\Drupal\Core\StringTranslation\TranslatableMarkup $category
     *   The human-readable category of the layout definition.
     *
     * @return $this
     */
    public function setCategory($category) {
        $this->category = $category;
        return $this;
    }
    
    /**
     * Gets the template name.
     *
     * @return string|null
     *   The template name, if it exists.
     */
    public function getTemplate() {
        return $this->template;
    }
    
    /**
     * Sets the template name.
     *
     * @param string|null $template
     *   The template name.
     *
     * @return $this
     */
    public function setTemplate($template) {
        $this->template = $template;
        return $this;
    }
    
    /**
     * Gets the template path.
     *
     * @return string
     *   The template path.
     */
    public function getTemplatePath() {
        return $this->templatePath;
    }
    
    /**
     * Sets the template path.
     *
     * @param string $template_path
     *   The template path.
     *
     * @return $this
     */
    public function setTemplatePath($template_path) {
        $this->templatePath = $template_path;
        return $this;
    }
    
    /**
     * Gets the theme hook.
     *
     * @return string|null
     *   The theme hook, if it exists.
     */
    public function getThemeHook() {
        return $this->theme_hook;
    }
    
    /**
     * Sets the theme hook.
     *
     * @param string $theme_hook
     *   The theme hook.
     *
     * @return $this
     */
    public function setThemeHook($theme_hook) {
        $this->theme_hook = $theme_hook;
        return $this;
    }
    
    /**
     * Gets the base path for this layout definition.
     *
     * @return string
     *   The base path.
     */
    public function getPath() {
        return $this->path;
    }
    
    /**
     * Sets the base path for this layout definition.
     *
     * @param string $path
     *   The base path.
     *
     * @return $this
     */
    public function setPath($path) {
        $this->path = $path;
        return $this;
    }
    
    /**
     * Gets the asset library for this layout definition.
     *
     * @return string|null
     *   The asset library, if it exists.
     */
    public function getLibrary() {
        return $this->library;
    }
    
    /**
     * Sets the asset library for this layout definition.
     *
     * @param string|null $library
     *   The asset library.
     *
     * @return $this
     */
    public function setLibrary($library) {
        $this->library = $library;
        return $this;
    }
    
    /**
     * Gets the icon path for this layout definition.
     *
     * @return string|null
     *   The icon path, if it exists.
     */
    public function getIconPath() {
        return $this->icon;
    }
    
    /**
     * Sets the icon path for this layout definition.
     *
     * @param string|null $icon
     *   The icon path.
     *
     * @return $this
     */
    public function setIconPath($icon) {
        $this->icon = $icon;
        return $this;
    }
    
    /**
     * Gets the icon map for this layout definition.
     *
     * This should not be used if an icon path is specified. See ::getIcon().
     *
     * @return string[][]|null
     *   The icon map, if it exists.
     */
    public function getIconMap() {
        return $this->icon_map;
    }
    
    /**
     * Sets the icon map for this layout definition.
     *
     * @param string[][]|null $icon_map
     *   The icon map.
     *
     * @return $this
     */
    public function setIconMap($icon_map) {
        $this->icon_map = $icon_map;
        return $this;
    }
    
    /**
     * Builds a render array for an icon representing the layout.
     *
     * @param int $width
     *   (optional) The width of the icon. Defaults to 125.
     * @param int $height
     *   (optional) The height of the icon. Defaults to 150.
     * @param int $stroke_width
     *   (optional) If an icon map is used, the width of region borders.
     * @param int $padding
     *   (optional) If an icon map is used, the padding between regions. Any
     *   value above 0 is valid.
     *
     * @return array
     *   A render array for the icon.
     */
    public function getIcon($width = 125, $height = 150, $stroke_width = NULL, $padding = NULL) {
        $icon = [];
        if ($icon_path = $this->getIconPath()) {
            $icon = [
                '#theme' => 'image',
                '#uri' => $icon_path,
                '#width' => $width,
                '#height' => $height,
                '#alt' => $this->getLabel(),
            ];
        }
        elseif ($icon_map = $this->getIconMap()) {
            $icon_builder = $this->getIconBuilder()
                ->setId($this->id())
                ->setLabel($this->getLabel())
                ->setWidth($width)
                ->setHeight($height);
            if ($padding) {
                $icon_builder->setPadding($padding);
            }
            if ($stroke_width) {
                $icon_builder->setStrokeWidth($stroke_width);
            }
            $icon = $icon_builder->build($icon_map);
        }
        return $icon;
    }
    
    /**
     * Wraps the icon builder.
     *
     * @return \Drupal\Core\Layout\Icon\IconBuilderInterface
     *   The icon builder.
     */
    protected function getIconBuilder() {
        return \Drupal::service('layout.icon_builder');
    }
    
    /**
     * Gets the regions for this layout definition.
     *
     * @return array[]
     *   The layout regions. The keys of the array are the machine names of the
     *   regions, and the values are an associative array with the following keys:
     *   - label: (string) The human-readable name of the region.
     *   Any remaining keys may have special meaning for the given layout plugin,
     *   but are undefined here.
     */
    public function getRegions() {
        return $this->regions;
    }
    
    /**
     * Sets the regions for this layout definition.
     *
     * @param array[] $regions
     *   An array of regions, see ::getRegions() for the format.
     *
     * @return $this
     */
    public function setRegions(array $regions) {
        $this->regions = $regions;
        return $this;
    }
    
    /**
     * Gets the machine-readable region names.
     *
     * @return string[]
     *   An array of machine-readable region names.
     */
    public function getRegionNames() {
        return array_keys($this->getRegions());
    }
    
    /**
     * Gets the human-readable region labels.
     *
     * @return string[]
     *   An array of human-readable region labels.
     */
    public function getRegionLabels() {
        $regions = $this->getRegions();
        return array_combine(array_keys($regions), array_column($regions, 'label'));
    }
    
    /**
     * Gets the default region.
     *
     * @return string
     *   The machine-readable name of the default region.
     */
    public function getDefaultRegion() {
        return $this->default_region;
    }
    
    /**
     * Sets the default region.
     *
     * @param string $default_region
     *   The machine-readable name of the default region.
     *
     * @return $this
     */
    public function setDefaultRegion($default_region) {
        $this->default_region = $default_region;
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDeriver() {
        return $this->deriver;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setDeriver($deriver) {
        $this->deriver = $deriver;
        return $this;
    }

}