laipower/wp-content/themes/generatepress/inc/class-css.php

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2020-04-07 13:03:04 +00:00
<?php
/**
* Builds our dynamic CSS.
*
* @package GeneratePress
*/
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly.
}
if ( ! class_exists( 'GeneratePress_CSS' ) ) {
/**
* Creates minified css via PHP.
*
* @author Carlos Rios
* Modified by Tom Usborne for GeneratePress
*/
class GeneratePress_CSS {
/**
* The css selector that you're currently adding rules to
*
* @access protected
* @var string
*/
protected $_selector = '';
/**
* Stores the final css output with all of its rules for the current selector.
*
* @access protected
* @var string
*/
protected $_selector_output = '';
/**
* Stores all of the rules that will be added to the selector
*
* @access protected
* @var string
*/
protected $_css = '';
/**
* The string that holds all of the css to output
*
* @access protected
* @var string
*/
protected $_output = '';
/**
* Stores media queries
*
* @var null
*/
protected $_media_query = null;
/**
* The string that holds all of the css to output inside of the media query
*
* @access protected
* @var string
*/
protected $_media_query_output = '';
/**
* Sets a selector to the object and changes the current selector to a new one
*
* @access public
* @since 1.0
*
* @param string $selector - the css identifier of the html that you wish to target
* @return $this
*/
public function set_selector( $selector = '' ) {
// Render the css in the output string everytime the selector changes.
if ( $this->_selector !== '' ) {
$this->add_selector_rules_to_output();
}
$this->_selector = $selector;
return $this;
}
/**
* Adds a css property with value to the css output
*
* @access public
* @since 1.0
*
* @param string $property - the css property
* @param string $value - the value to be placed with the property
* @param string $og_default - check to see if the value matches the default
* @param string $unit - the unit for the value (px)
* @return $this
*/
public function add_property( $property, $value, $og_default = false, $unit = false ) {
// Add our unit to our value if it exists.
if ( $unit && '' !== $unit ) {
$value = $value . $unit;
if ( '' !== $og_default ) {
$og_default = $og_default . $unit;
}
}
// If we don't have a value or our value is the same as our og default, bail.
if ( empty( $value ) || $og_default == $value ) {
return false;
}
$this->_css .= $property . ':' . $value . ';';
return $this;
}
/**
* Sets a media query in the class
*
* @since 1.1
* @param string $value
* @return $this
*/
public function start_media_query( $value ) {
// Add the current rules to the output.
$this->add_selector_rules_to_output();
// Add any previous media queries to the output.
if ( ! empty( $this->_media_query ) ) {
$this->add_media_query_rules_to_output();
}
// Set the new media query.
$this->_media_query = $value;
return $this;
}
/**
* Stops using a media query.
*
* @see start_media_query()
*
* @since 1.1
* @return $this
*/
public function stop_media_query() {
return $this->start_media_query( null );
}
/**
* Adds the current media query's rules to the class' output variable
*
* @since 1.1
* @return $this
*/
private function add_media_query_rules_to_output() {
if ( ! empty( $this->_media_query_output ) ) {
$this->_output .= sprintf( '@media %1$s{%2$s}', $this->_media_query, $this->_media_query_output );
// Reset the media query output string.
$this->_media_query_output = '';
}
return $this;
}
/**
* Adds the current selector rules to the output variable
*
* @access private
* @since 1.0
*
* @return $this
*/
private function add_selector_rules_to_output() {
if ( ! empty( $this->_css ) ) {
$this->_selector_output = $this->_selector;
$selector_output = sprintf( '%1$s{%2$s}', $this->_selector_output, $this->_css );
// Add our CSS to the output.
if ( ! empty( $this->_media_query ) ) {
$this->_media_query_output .= $selector_output;
$this->_css = '';
} else {
$this->_output .= $selector_output;
}
// Reset the css.
$this->_css = '';
}
return $this;
}
/**
* Returns the minified css in the $_output variable
*
* @access public
* @since 1.0
*
* @return string
*/
public function css_output() {
// Add current selector's rules to output.
$this->add_selector_rules_to_output();
// Output minified css.
return $this->_output;
}
}
}