jetformbuilder / modules / framework / blocks-style-manager / style-inserter.php

style-inserter.php in JetFormBuilder — Dynamic Blocks Form Builder 3.6.6, at modules/framework/blocks-style-manager/style-inserter.php

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1	<?php
2	/**
3	* CSS parser engine
4	*/
5	namespace Crocoblock\Blocks_Style;
6
7
8	class Style_Inserter {
9
10	protected $class_name = '';
11
12	protected $data = array();
13
14	/**
15	* Current styles collection.
16	*
17	* @var string\|null
18	*/
19	public static $current_collection = null;
20
21	/**
22	* All styles grouped into collections.
23	*
24	* @var array
25	*/
26	public static $collections = array();
27
28	public function __construct( $class_name = '', $data = array() ) {
29	$this->class_name = $class_name;
30	$this->data = $data;
31	}
32
33	/**
34	* Set current styles collection.
35	*
36	* @param string\|null $name
37	* @return void
38	*/
39	public static function set_collection( $name = null ) {
40	self::$current_collection = $name;
41	}
42
43	/**
44	* Insert styles into the given content.
45	*
46	* 1. If the content is empty, it returns an empty string.
47	* 2. If $this->data contains not empty 'styles' key,
48	* it returns the styles wrapped in a <style> tag and adds to the begining
49	* of the content.
50	* 3. Also it adds $this->class_name to the content wrapper class.
51	* 4. To do this we need to check - if first tag of the content is contains
52	* class attribute, we will add our class to it.
53	* 5. If the first tag does not contain class attribute, we create a new class attribute with
54	* our class and add it to the first tag.
55	* 6. Now we need to check if $this->data contains not empty 'variables' key,
56	* if so, we need to add these variables to the style attribute of first tag in the content.
57	* 7. If the first tag does not contain style attribute, we create a new style attribute
58	* with our variables and add it to the first tag if already contain - we will append our
59	* variables to it.
60	*
61	* @param string $content Content to insert styles into.
62	* @return string
63	*/
64	public function insert_styles( $content = '' ) {
65
66	$variables = '';
67
68	if ( ! empty( $this->data['variables'] ) ) {
69	$variables = trim( ' ' . $this->data['variables'] );
70	$variables = sprintf( '.%1$s { %2$s }', $this->class_name, $variables );
71	}
72
73	$styles = trim( $variables . ' ' . $this->data['styles'] );
74
75	if ( ! empty( $styles ) ) {
76
77	if ( ! empty( $content ) && ! empty( $this->class_name ) ) {
78	$content = $this->with_class_name( $content );
79	}
80
81	if ( ! empty( self::$current_collection ) ) {
82
83	if ( ! isset( self::$collections[ self::$current_collection ] ) ) {
84	self::$collections[ self::$current_collection ] = '';
85	}
86
87	self::$collections[ self::$current_collection ] .= $styles;
88
89	// If we stored styles into the collection - there is nothing more to do.
90	return $content;
91	}
92
93	if ( ! Style_Cache::get_instance()->is_printed( $this->class_name ) ) {
94	if ( ! did_action( 'wp_head' ) && ! wp_doing_ajax() ) {
95	// If the wp_head action isn't called yet, we will add the styles to the head.
96	add_action( 'wp_head', function() use ( $styles ) {
97	echo self::styles_with_tag( $styles );
98	} );
99	} else {
100	// If the wp_head action is already called or this is an AJAX request,
101	// we will add the styles to the content.
102	$content = self::styles_with_tag( $styles ) . $content;
103	}
104	}
105	}
106
107	return $content;
108	}
109
110	/**
111	* Get styles collection by name.
112	*
113	* @param string\|null $name
114	* @return string
115	*/
116	public static function get_styles_collection( $name = null, $with_tag = true ) {
117
118	if ( ! $name ) {
119	return '';
120	}
121
122	$styles = isset( self::$collections[ $name ] ) ? self::$collections[ $name ] : '';
123
124	if ( ! $styles ) {
125	return '';
126	}
127
128	return $with_tag ? self::styles_with_tag( $styles ) : $styles;
129	}
130
131	/**
132	* Add class name to the content wrapper.
133	*
134	* @param string $content Content to add class name to.
135	* @return string
136	*/
137	public function with_class_name( $content = '' ) {
138
139	if ( empty( $content ) \|\| empty( $this->class_name ) ) {
140	return $content;
141	}
142
143	if ( ! class_exists( '\WP_HTML_Processor' ) ) {
144	require_once ABSPATH . WPINC . '/class-wp-html-processor.php';
145	}
146
147	$processor = \WP_HTML_Processor::create_fragment( $content );
148
149	while ( $processor->next_tag( [
150	'breadcrumbs' => [ 'BODY', '*' ],
151	'tag_closers' => 'skip',
152	] ) ) {
153	$processor->add_class( $this->class_name );
154	}
155
156	$content = $processor->get_updated_html();
157
158	return $content;
159	}
160
161	/**
162	* Get styles wrapped into the <style> tag.
163	*
164	* @param string $css CSS styles to insert.
165	* @return string
166	*/
167	public static function styles_with_tag( $css = '' ) {
168	return '<style>' . $css . '</style>';
169	}
170	}
171