330 lines
10 KiB
PHP
330 lines
10 KiB
PHP
<?php
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/**
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* Customize API: WP_Customize_Partial class
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*
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* @package WordPress
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* @subpackage Customize
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* @since 4.5.0
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*/
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/**
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* Core Customizer class for implementing selective refresh partials.
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*
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* Representation of a rendered region in the previewed page that gets
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* selectively refreshed when an associated setting is changed.
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* This class is analogous of WP_Customize_Control.
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*
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* @since 4.5.0
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*/
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class WP_Customize_Partial {
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/**
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* Component.
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*
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* @since 4.5.0
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* @var WP_Customize_Selective_Refresh
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*/
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public $component;
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/**
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* Unique identifier for the partial.
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*
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* If the partial is used to display a single setting, this would generally
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* be the same as the associated setting's ID.
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*
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* @since 4.5.0
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* @var string
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*/
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public $id;
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/**
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* Parsed ID.
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*
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* @since 4.5.0
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* @var array {
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* @type string $base ID base.
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* @type array $keys Keys for multidimensional.
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* }
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*/
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protected $id_data = array();
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/**
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* Type of this partial.
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*
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* @since 4.5.0
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* @var string
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*/
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public $type = 'default';
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/**
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* The jQuery selector to find the container element for the partial.
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*
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* @since 4.5.0
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* @var string
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*/
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public $selector;
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/**
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* IDs for settings tied to the partial.
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*
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* @since 4.5.0
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* @var string[]
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*/
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public $settings;
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/**
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* The ID for the setting that this partial is primarily responsible for rendering.
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*
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* If not supplied, it will default to the ID of the first setting.
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*
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* @since 4.5.0
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* @var string
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*/
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public $primary_setting;
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/**
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* Capability required to edit this partial.
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*
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* Normally this is empty and the capability is derived from the capabilities
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* of the associated `$settings`.
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*
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* @since 4.5.0
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* @var string
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*/
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public $capability;
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/**
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* Render callback.
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*
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* @since 4.5.0
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*
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* @see WP_Customize_Partial::render()
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* @var callable Callback is called with one argument, the instance of
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* WP_Customize_Partial. The callback can either echo the
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* partial or return the partial as a string, or return false if error.
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*/
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public $render_callback;
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/**
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* Whether the container element is included in the partial, or if only the contents are rendered.
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*
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* @since 4.5.0
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* @var bool
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*/
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public $container_inclusive = false;
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/**
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* Whether to refresh the entire preview in case a partial cannot be refreshed.
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*
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* A partial render is considered a failure if the render_callback returns false.
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*
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* @since 4.5.0
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* @var bool
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*/
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public $fallback_refresh = true;
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/**
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* Constructor.
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*
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* Supplied `$args` override class property defaults.
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*
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* If `$args['settings']` is not defined, use the $id as the setting ID.
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*
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* @since 4.5.0
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*
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* @param WP_Customize_Selective_Refresh $component Customize Partial Refresh plugin instance.
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* @param string $id Control ID.
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* @param array $args {
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* Optional. Array of properties for the new Partials object. Default empty array.
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*
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* @type string $type Type of the partial to be created.
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* @type string $selector The jQuery selector to find the container element for the partial, that is,
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* a partial's placement.
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* @type string[] $settings IDs for settings tied to the partial. If undefined, `$id` will be used.
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* @type string $primary_setting The ID for the setting that this partial is primarily responsible for
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* rendering. If not supplied, it will default to the ID of the first setting.
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* @type string $capability Capability required to edit this partial.
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* Normally this is empty and the capability is derived from the capabilities
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* of the associated `$settings`.
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* @type callable $render_callback Render callback.
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* Callback is called with one argument, the instance of WP_Customize_Partial.
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* The callback can either echo the partial or return the partial as a string,
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* or return false if error.
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* @type bool $container_inclusive Whether the container element is included in the partial, or if only
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* the contents are rendered.
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* @type bool $fallback_refresh Whether to refresh the entire preview in case a partial cannot be refreshed.
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* A partial render is considered a failure if the render_callback returns
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* false.
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* }
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*/
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public function __construct( WP_Customize_Selective_Refresh $component, $id, $args = array() ) {
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$keys = array_keys( get_object_vars( $this ) );
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foreach ( $keys as $key ) {
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if ( isset( $args[ $key ] ) ) {
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$this->$key = $args[ $key ];
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}
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}
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$this->component = $component;
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$this->id = $id;
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$this->id_data['keys'] = preg_split( '/\[/', str_replace( ']', '', $this->id ) );
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$this->id_data['base'] = array_shift( $this->id_data['keys'] );
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if ( empty( $this->render_callback ) ) {
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$this->render_callback = array( $this, 'render_callback' );
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}
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// Process settings.
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if ( ! isset( $this->settings ) ) {
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$this->settings = array( $id );
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} elseif ( is_string( $this->settings ) ) {
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$this->settings = array( $this->settings );
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}
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if ( empty( $this->primary_setting ) ) {
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$this->primary_setting = current( $this->settings );
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}
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}
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/**
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* Retrieves parsed ID data for multidimensional setting.
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*
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* @since 4.5.0
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*
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* @return array {
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* ID data for multidimensional partial.
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*
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* @type string $base ID base.
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* @type array $keys Keys for multidimensional array.
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* }
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*/
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final public function id_data() {
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return $this->id_data;
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}
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/**
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* Renders the template partial involving the associated settings.
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*
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* @since 4.5.0
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*
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* @param array $container_context Optional. Array of context data associated with the target container (placement).
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* Default empty array.
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* @return string|array|false The rendered partial as a string, raw data array (for client-side JS template),
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* or false if no render applied.
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*/
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final public function render( $container_context = array() ) {
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$partial = $this;
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$rendered = false;
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if ( ! empty( $this->render_callback ) ) {
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ob_start();
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$return_render = call_user_func( $this->render_callback, $this, $container_context );
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$ob_render = ob_get_clean();
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if ( null !== $return_render && '' !== $ob_render ) {
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_doing_it_wrong( __FUNCTION__, __( 'Partial render must echo the content or return the content string (or array), but not both.' ), '4.5.0' );
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}
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/*
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* Note that the string return takes precedence because the $ob_render may just\
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* include PHP warnings or notices.
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*/
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$rendered = null !== $return_render ? $return_render : $ob_render;
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}
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/**
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* Filters partial rendering.
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*
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* @since 4.5.0
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*
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* @param string|array|false $rendered The partial value. Default false.
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* @param WP_Customize_Partial $partial WP_Customize_Setting instance.
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* @param array $container_context Optional array of context data associated with
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* the target container.
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*/
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$rendered = apply_filters( 'customize_partial_render', $rendered, $partial, $container_context );
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/**
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* Filters partial rendering for a specific partial.
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*
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* The dynamic portion of the hook name, `$partial->ID` refers to the partial ID.
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*
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* @since 4.5.0
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*
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* @param string|array|false $rendered The partial value. Default false.
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* @param WP_Customize_Partial $partial WP_Customize_Setting instance.
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* @param array $container_context Optional array of context data associated with
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* the target container.
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*/
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$rendered = apply_filters( "customize_partial_render_{$partial->id}", $rendered, $partial, $container_context );
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return $rendered;
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}
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/**
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* Default callback used when invoking WP_Customize_Control::render().
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*
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* Note that this method may echo the partial *or* return the partial as
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* a string or array, but not both. Output buffering is performed when this
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* is called. Subclasses can override this with their specific logic, or they
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* may provide an 'render_callback' argument to the constructor.
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*
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* This method may return an HTML string for straight DOM injection, or it
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* may return an array for supporting Partial JS subclasses to render by
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* applying to client-side templating.
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*
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* @since 4.5.0
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*
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* @param WP_Customize_Partial $partial Partial.
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* @param array $context Context.
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* @return string|array|false
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*/
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public function render_callback( WP_Customize_Partial $partial, $context = array() ) {
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unset( $partial, $context );
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return false;
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}
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/**
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* Retrieves the data to export to the client via JSON.
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*
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* @since 4.5.0
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*
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* @return array Array of parameters passed to the JavaScript.
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*/
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public function json() {
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$exports = array(
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'settings' => $this->settings,
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'primarySetting' => $this->primary_setting,
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'selector' => $this->selector,
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'type' => $this->type,
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'fallbackRefresh' => $this->fallback_refresh,
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'containerInclusive' => $this->container_inclusive,
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);
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return $exports;
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}
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/**
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* Checks if the user can refresh this partial.
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*
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* Returns false if the user cannot manipulate one of the associated settings,
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* or if one of the associated settings does not exist.
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*
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* @since 4.5.0
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*
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* @return bool False if user can't edit one of the related settings,
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* or if one of the associated settings does not exist.
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*/
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final public function check_capabilities() {
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if ( ! empty( $this->capability ) && ! current_user_can( $this->capability ) ) {
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return false;
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}
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foreach ( $this->settings as $setting_id ) {
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$setting = $this->component->manager->get_setting( $setting_id );
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if ( ! $setting || ! $setting->check_capabilities() ) {
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return false;
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}
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}
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return true;
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}
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}
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