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<?php
namespace Elementor;
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly.
}
/**
* Elementor stylesheet.
*
* Elementor stylesheet handler class responsible for setting up CSS rules and
* properties, and all the CSS `@media` rule with supported viewport width.
*
* @since 1.0.0
*/
class Stylesheet {
/**
* CSS Rules.
*
* Holds the list of CSS rules.
*
* @since 1.0.0
* @access private
*
* @var array A list of CSS rules.
*/
private $rules = [];
/**
* Devices.
*
* Holds the list of devices.
*
* @since 1.0.0
* @access private
*
* @var array A list of devices.
*/
private $devices = [];
/**
* Raw CSS.
*
* Holds the raw CSS.
*
* @since 1.0.0
* @access private
*
* @var array The raw CSS.
*/
private $raw = [];
/**
* Parse CSS rules.
*
* Goes over the list of CSS rules and generates the final CSS.
*
* @since 1.0.0
* @access public
* @static
*
* @param array $rules CSS rules.
*
* @return string Parsed rules.
*/
public static function parse_rules( array $rules ) {
$parsed_rules = '';
foreach ( $rules as $selector => $properties ) {
$selector_content = self::parse_properties( $properties );
if ( $selector_content ) {
$parsed_rules .= $selector . '{' . $selector_content . '}';
}
}
return $parsed_rules;
}
/**
* Parse CSS properties.
*
* Goes over the selector properties and generates the CSS of the selector.
*
* @since 1.0.0
* @access public
* @static
*
* @param array $properties CSS properties.
*
* @return string Parsed properties.
*/
public static function parse_properties( array $properties ) {
$parsed_properties = '';
foreach ( $properties as $property_key => $property_value ) {
if ( '' !== $property_value ) {
$parsed_properties .= $property_key . ':' . $property_value . ';';
}
}
return $parsed_properties;
}
/**
* Add device.
*
* Add a new device to the devices list.
*
* @since 1.0.0
* @access public
*
* @param string $device_name Device name.
* @param string $device_max_point Device maximum point.
*
* @return Stylesheet The current stylesheet class instance.
*/
public function add_device( $device_name, $device_max_point ) {
$this->devices[ $device_name ] = $device_max_point;
asort( $this->devices );
return $this;
}
/**
* Add rules.
*
* Add a new CSS rule to the rules list.
*
* @since 1.0.0
* @access public
*
* @param string $selector CSS selector.
* @param array|string $style_rules Optional. Style rules. Default is `null`.
* @param array $query Optional. Media query. Default is `null`.
*
* @return Stylesheet The current stylesheet class instance.
*/
public function add_rules( $selector, $style_rules = null, array $query = null ) {
$query_hash = 'all';
if ( $query ) {
$query_hash = $this->query_to_hash( $query );
}
if ( ! isset( $this->rules[ $query_hash ] ) ) {
$this->add_query_hash( $query_hash );
}
if ( null === $style_rules ) {
preg_match_all( '/([^\s].+?(?=\{))\{((?s:.)+?(?=}))}/', $selector, $parsed_rules );
foreach ( $parsed_rules[1] as $index => $selector ) {
$this->add_rules( $selector, $parsed_rules[2][ $index ], $query );
}
return $this;
}
if ( ! isset( $this->rules[ $query_hash ][ $selector ] ) ) {
$this->rules[ $query_hash ][ $selector ] = [];
}
if ( is_string( $style_rules ) ) {
$style_rules = array_filter( explode( ';', trim( $style_rules ) ) );
$ordered_rules = [];
foreach ( $style_rules as $rule ) {
$property = explode( ':', $rule, 2 );
if ( count( $property ) < 2 ) {
return $this;
}
$ordered_rules[ trim( $property[0] ) ] = trim( $property[1], ' ;' );
}
$style_rules = $ordered_rules;
}
$this->rules[ $query_hash ][ $selector ] = array_merge( $this->rules[ $query_hash ][ $selector ], $style_rules );
return $this;
}
/**
* Add raw CSS.
*
* Add a raw CSS rule.
*
* @since 1.0.8
* @access public
*
* @param string $css The raw CSS.
* @param string $device Optional. The device. Default is empty.
*
* @return Stylesheet The current stylesheet class instance.
*/
public function add_raw_css( $css, $device = '' ) {
if ( ! isset( $this->raw[ $device ] ) ) {
$this->raw[ $device ] = [];
}
$this->raw[ $device ][] = trim( $css );
return $this;
}
/**
* Get CSS rules.
*
* Retrieve the CSS rules.
*
* @since 1.0.5
* @access public
*
* @param string $device Optional. The device. Default is empty.
* @param string $selector Optional. CSS selector. Default is empty.
* @param string $property Optional. CSS property. Default is empty.
*
* @return null|array CSS rules, or `null` if not rules found.
*/
public function get_rules( $device = null, $selector = null, $property = null ) {
if ( ! $device ) {
return $this->rules;
}
if ( $property ) {
return isset( $this->rules[ $device ][ $selector ][ $property ] ) ? $this->rules[ $device ][ $selector ][ $property ] : null;
}
if ( $selector ) {
return isset( $this->rules[ $device ][ $selector ] ) ? $this->rules[ $device ][ $selector ] : null;
}
return isset( $this->rules[ $device ] ) ? $this->rules[ $device ] : null;
}
/**
* To string.
*
* This magic method responsible for parsing the rules into one CSS string.
*
* @since 1.0.0
* @access public
*
* @return string CSS style.
*/
public function __toString() {
$style_text = '';
foreach ( $this->rules as $query_hash => $rule ) {
$device_text = self::parse_rules( $rule );
if ( 'all' !== $query_hash ) {
$device_text = $this->get_query_hash_style_format( $query_hash ) . '{' . $device_text . '}';
}
$style_text .= $device_text;
}
foreach ( $this->raw as $device_name => $raw ) {
$raw = implode( "\n", $raw );
if ( $raw && isset( $this->devices[ $device_name ] ) ) {
$raw = '@media(max-width: ' . $this->devices[ $device_name ] . 'px){' . $raw . '}';
}
$style_text .= $raw;
}
return $style_text;
}
/**
* Query to hash.
*
* Turns the media query into a hashed string that represents the query
* endpoint in the rules list.
*
* @since 1.2.0
* @access private
*
* @param array $query CSS media query.
*
* @return string Hashed string of the query.
*/
private function query_to_hash( array $query ) {
$hash = [];
foreach ( $query as $endpoint => $value ) {
$hash[] = $endpoint . '_' . $value;
}
return implode( '-', $hash );
}
/**
* Hash to query.
*
* Turns the hashed string to an array that contains the data of the query
* endpoint.
*
* @since 1.2.0
* @access private
*
* @param string $hash Hashed string of the query.
*
* @return array Media query data.
*/
private function hash_to_query( $hash ) {
$query = [];
$hash = array_filter( explode( '-', $hash ) );
foreach ( $hash as $single_query ) {
preg_match( '/(min|max)_(.*)/', $single_query, $query_parts );
$end_point = $query_parts[1];
$device_name = $query_parts[2];
$query[ $end_point ] = 'max' === $end_point ? $this->devices[ $device_name ] : Plugin::$instance->breakpoints->get_device_min_breakpoint( $device_name );
}
return $query;
}
/**
* Add query hash.
*
* Register new endpoint query and sort the rules the way they should be
* displayed in the final stylesheet based on the device and the viewport
* width.
*
* @since 1.2.0
* @access private
*
* @param string $query_hash Hashed string of the query.
*/
private function add_query_hash( $query_hash ) {
$this->rules[ $query_hash ] = [];
uksort(
$this->rules, function( $a, $b ) {
if ( 'all' === $a ) {
return -1;
}
if ( 'all' === $b ) {
return 1;
}
$a_query = $this->hash_to_query( $a );
$b_query = $this->hash_to_query( $b );
if ( isset( $a_query['min'] ) xor isset( $b_query['min'] ) ) {
return 1;
}
if ( isset( $a_query['min'] ) ) {
$range = $a_query['min'] - $b_query['min'];
if ( $range ) {
return $range;
}
$a_has_max = isset( $a_query['max'] );
if ( $a_has_max xor isset( $b_query['max'] ) ) {
return $a_has_max ? 1 : -1;
}
if ( ! $a_has_max ) {
return 0;
}
}
return $b_query['max'] - $a_query['max'];
}
);
}
/**
* Get query hash style format.
*
* Retrieve formated media query rule with the endpoint width settings.
*
* The method returns the CSS `@media` rule and supported viewport width in
* pixels. It can also handel multiple width endpoints.
*
* @since 1.2.0
* @access private
*
* @param string $query_hash The hash of the query.
*
* @return string CSS media query.
*/
private function get_query_hash_style_format( $query_hash ) {
$query = $this->hash_to_query( $query_hash );
$style_format = [];
foreach ( $query as $end_point => $value ) {
$style_format[] = '(' . $end_point . '-width:' . $value . 'px)';
}
return '@media' . implode( ' and ', $style_format );
}
}