385 lines
9.7 KiB
PHP
385 lines
9.7 KiB
PHP
<?php
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/**
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* Icons API: WP_Icons_Registry class
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*
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* @package WordPress
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* @since 7.0.0
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*/
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/**
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* Core class used for interacting with registered icons.
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*
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* @since 7.0.0
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*/
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class WP_Icons_Registry {
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/**
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* Registered icons array.
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*
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* @since 7.0.0
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* @var array[]
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*/
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protected $registered_icons = array();
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/**
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* Container for the main instance of the class.
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*
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* @since 7.0.0
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* @var WP_Icons_Registry|null
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*/
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protected static $instance = null;
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/**
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* Constructor.
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*
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* WP_Icons_Registry is a singleton class, so keep this protected.
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*
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* Icons are populated via `_wp_register_default_icons()` during the
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* `init` action. Third-party icons can be registered via
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* {@see wp_register_icon()} once their collection is registered.
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*
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* @since 7.0.0
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*/
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protected function __construct() {}
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/**
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* Registers an icon.
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*
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* @since 7.0.0
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* @since 7.1.0 The icon name must be namespaced in the form "collection/icon-name".
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*
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* @param string $icon_name Namespaced icon name in the form "collection/icon-name"
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* (e.g. "core/arrow-left").
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* @param array $icon_properties {
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* List of properties for the icon.
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*
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* @type string $label Required. A human-readable label for the icon.
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* @type string $content Optional. SVG markup for the icon.
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* If not provided, the content will be retrieved from the `file_path` if set.
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* If both `content` and `file_path` are not set, the icon will not be registered.
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* @type string $file_path Optional. The full path to the file containing the icon content.
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* }
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* @return bool True if the icon was registered with success and false otherwise.
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*/
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public function register( $icon_name, $icon_properties ) {
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if ( ! isset( $icon_name ) || ! is_string( $icon_name ) ) {
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_doing_it_wrong(
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__METHOD__,
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__( 'Icon name must be a string.' ),
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'7.0.0'
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);
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return false;
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}
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// Require a namespaced name in the form "collection/icon-name".
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if ( ! str_contains( $icon_name, '/' ) ) {
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_doing_it_wrong(
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__METHOD__,
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__( 'Icon name must be namespaced in the form "collection/icon-name".' ),
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'7.1.0'
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);
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return false;
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}
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// Split the namespaced name into a collection slug and an unqualified icon name.
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list( $collection, $unqualified_name ) = explode( '/', $icon_name, 2 );
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if ( preg_match( '/[A-Z]/', $unqualified_name ) ) {
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_doing_it_wrong(
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__METHOD__,
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__( 'Icon names must not contain uppercase characters.' ),
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'7.1.0'
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);
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return false;
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}
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if ( ! preg_match( '/^[a-z0-9](?:[a-z0-9_-]*[a-z0-9])?$/', $unqualified_name ) ) {
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_doing_it_wrong(
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__METHOD__,
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__( 'Icon names must start and end with a lowercase letter or digit and contain only lowercase letters, digits, hyphens, and underscores.' ),
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'7.1.0'
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);
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return false;
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}
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$allowed_keys = array_fill_keys( array( 'label', 'content', 'file_path' ), 1 );
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foreach ( array_keys( $icon_properties ) as $key ) {
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if ( ! array_key_exists( $key, $allowed_keys ) ) {
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_doing_it_wrong(
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__METHOD__,
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sprintf(
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/* translators: %s: The name of a user-provided key. */
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__( 'Invalid icon property: "%s".' ),
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$key
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),
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'7.0.0'
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);
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return false;
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}
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}
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if ( ! WP_Icon_Collections_Registry::get_instance()->is_registered( $collection ) ) {
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_doing_it_wrong(
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__METHOD__,
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sprintf(
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/* translators: %s: Icon collection slug. */
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__( 'Icon collection "%s" is not registered.' ),
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$collection
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),
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'7.1.0'
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);
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return false;
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}
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if ( ! isset( $icon_properties['label'] ) || ! is_string( $icon_properties['label'] ) ) {
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_doing_it_wrong(
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__METHOD__,
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__( 'Icon label must be a string.' ),
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'7.0.0'
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);
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return false;
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}
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if (
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( ! isset( $icon_properties['content'] ) && ! isset( $icon_properties['file_path'] ) ) ||
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( isset( $icon_properties['content'] ) && isset( $icon_properties['file_path'] ) )
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) {
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_doing_it_wrong(
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__METHOD__,
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__( 'Icons must provide either `content` or `file_path`.' ),
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'7.0.0'
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);
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return false;
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}
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if ( isset( $icon_properties['content'] ) ) {
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if ( ! is_string( $icon_properties['content'] ) ) {
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_doing_it_wrong(
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__METHOD__,
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__( 'Icon content must be a string.' ),
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'7.0.0'
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);
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return false;
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}
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$sanitized_icon_content = $this->sanitize_icon_content( $icon_properties['content'] );
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if ( empty( $sanitized_icon_content ) ) {
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_doing_it_wrong(
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__METHOD__,
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__( 'Icon content does not contain valid SVG markup.' ),
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'7.0.0'
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);
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return false;
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}
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$icon_properties['content'] = $sanitized_icon_content;
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}
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$qualified_name = $collection . '/' . $unqualified_name;
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if ( $this->is_registered( $qualified_name ) ) {
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_doing_it_wrong(
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__METHOD__,
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__( 'Icon is already registered.' ),
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'7.1.0'
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);
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return false;
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}
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$icon = array_merge(
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$icon_properties,
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array(
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'name' => $qualified_name,
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'collection' => $collection,
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)
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);
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$this->registered_icons[ $qualified_name ] = $icon;
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return true;
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}
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/**
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* Unregisters an icon.
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*
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* @since 7.1.0
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*
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* @param string $icon_name Namespaced icon name in the form "collection/icon-name"
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* (e.g. "core/arrow-left").
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* @return bool True if the icon was unregistered successfully, false otherwise.
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*/
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public function unregister( $icon_name ) {
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if ( ! $this->is_registered( $icon_name ) ) {
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_doing_it_wrong(
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__METHOD__,
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sprintf(
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/* translators: %s: Icon name. */
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__( 'Icon "%s" is not registered.' ),
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$icon_name
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),
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'7.1.0'
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);
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return false;
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}
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unset( $this->registered_icons[ $icon_name ] );
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return true;
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}
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/**
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* Sanitizes the icon SVG content.
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*
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* Logic borrowed from twentytwenty.
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* @see twentytwenty_get_theme_svg
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*
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* @since 7.0.0
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*
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* @param string $icon_content The icon SVG content to sanitize.
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* @return string The sanitized icon SVG content.
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*/
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protected function sanitize_icon_content( $icon_content ) {
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$allowed_tags = array(
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'svg' => array(
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'class' => true,
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'xmlns' => true,
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'width' => true,
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'height' => true,
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'viewbox' => true,
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'aria-hidden' => true,
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'role' => true,
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'focusable' => true,
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),
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'path' => array(
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'fill' => true,
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'fill-rule' => true,
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'd' => true,
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'transform' => true,
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),
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'polygon' => array(
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'fill' => true,
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'fill-rule' => true,
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'points' => true,
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'transform' => true,
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'focusable' => true,
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),
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);
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return wp_kses( $icon_content, $allowed_tags );
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}
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/**
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* Retrieves the content of a registered icon.
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*
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* @since 7.0.0
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*
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* @param string $icon_name Icon name including namespace.
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* @return string|null The content of the icon, if found.
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*/
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protected function get_content( $icon_name ) {
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if ( ! isset( $this->registered_icons[ $icon_name ]['content'] ) ) {
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$file_path = $this->registered_icons[ $icon_name ]['file_path'] ?? '';
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$is_stringy = is_string( $file_path ) || ( is_object( $file_path ) && method_exists( $file_path, '__toString' ) );
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$icon_path = $is_stringy ? realpath( (string) $file_path ) : false;
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if (
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! is_string( $icon_path ) ||
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! str_ends_with( $icon_path, '.svg' ) ||
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! is_file( $icon_path ) ||
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! is_readable( $icon_path )
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) {
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wp_trigger_error(
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__METHOD__,
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__( 'Icon file is missing or unreadable.' )
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);
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return null;
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}
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$content = $this->sanitize_icon_content( file_get_contents( $icon_path ) );
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if ( empty( $content ) ) {
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wp_trigger_error(
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__METHOD__,
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__( 'Icon content does not contain valid SVG markup.' )
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);
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return null;
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}
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$this->registered_icons[ $icon_name ]['content'] = $content;
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}
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return $this->registered_icons[ $icon_name ]['content'];
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}
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/**
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* Retrieves an array containing the properties of a registered icon.
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*
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* @since 7.0.0
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*
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* @param string $icon_name Icon name including namespace.
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* @return array|null Registered icon properties or `null` if the icon is not registered.
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*/
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public function get_registered_icon( $icon_name ) {
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if ( ! $this->is_registered( $icon_name ) ) {
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return null;
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}
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$icon = $this->registered_icons[ $icon_name ];
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$icon['content'] = $icon['content'] ?? $this->get_content( $icon_name );
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return $icon;
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}
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/**
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* Retrieves all registered icons.
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*
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* @since 7.0.0
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* @since 7.1.0 Search also matches icon labels.
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*
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* @param string $search Optional. Search term by which to filter the icons.
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* @return array[] Array of arrays containing the registered icon properties.
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*/
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public function get_registered_icons( $search = '' ) {
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$icons = array();
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foreach ( $this->registered_icons as $icon ) {
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if ( ! empty( $search )
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&& false === stripos( $icon['name'], $search )
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&& false === stripos( $icon['label'] ?? '', $search )
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) {
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continue;
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}
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$icon['content'] = $icon['content'] ?? $this->get_content( $icon['name'] );
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$icons[] = $icon;
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}
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return $icons;
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}
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/**
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* Checks if an icon is registered.
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*
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* @since 7.0.0
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*
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* @param string $icon_name Icon name including namespace.
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* @return bool True if the icon is registered, false otherwise.
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*/
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public function is_registered( $icon_name ) {
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return isset( $this->registered_icons[ $icon_name ] );
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}
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/**
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* Utility method to retrieve the main instance of the class.
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*
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* The instance will be created if it does not exist yet.
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*
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* @since 7.0.0
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*
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* @return WP_Icons_Registry The main instance.
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*/
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public static function get_instance() {
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if ( null === self::$instance ) {
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self::$instance = new self();
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}
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return self::$instance;
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}
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}
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