leaflet-map / shortcodes / class.shortcode.php

class.shortcode.php in Leaflet Map trunk, at shortcodes/class.shortcode.php

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1	<?php
2	/**
3	* Abstract Shortcode
4	*
5	* @category Shortcode
6	* @author Benjamin J DeLong <ben@bozdoz.com>
7	*/
8
9	/**
10	* Abstract Shortcode Class
11	*
12	* Use with add_shortcode('leaflet-map', array ('Leaflet_Shortcode', 'shortcode'))
13	* extend and manipulate __construct
14	*/
15	abstract class Leaflet_Shortcode
16	{
17	/**
18	* @var Leaflet_Map
19	*/
20	protected $LM;
21
22	/**
23	* Generate HTML from the shortcode
24	* Maybe won't always be required
25	*
26	* @param array $atts string
27	* @param string $content Optional
28	*
29	* @since 2.8.2
30	*
31	* @return string (typically, return a script tag with Leaflet logic)
32	*/
33	abstract protected function getHTML($atts='', $content=null);
34
35	public static function getClass()
36	{
37	return function_exists('get_called_class') ? get_called_class() : __CLASS__;
38	}
39
40	/**
41	* Instantiate class and get HTML for shortcode
42	*
43	* @param array\|string\|null $atts string\|array
44	* @param string\|null $content Optional
45	*
46	* @return string HTML
47	*/
48	public static function shortcode($atts = '', $content = null)
49	{
50	$class = self::getClass();
51	$instance = new $class();
52
53	// swap sequential array with associative array
54	// this enables assumed-boolean attributes,
55	// like: [leaflet-marker draggable svg]
56	// meaning draggable=1 svg=1
57	// and: [leaflet-marker !doubleClickZoom !boxZoom]
58	// meaning doubleClickZoom=0 boxZoom=0
59	if (!empty($atts)) {
60	foreach($atts as $k => $v) {
61	if (
62	is_numeric($k) &&
63	!key_exists($v, $atts) &&
64	!!$v
65	) {
66	// false if starts with !, else true
67	if ($v[0] === '!') {
68	$k = substr($v, 1);
69	$v = 0;
70	} else {
71	$k = $v;
72	$v = 1;
73	}
74	$atts[$k] = $v;
75	}
76	// change hyphens to underscores for `extract()`
77	if (strpos($k, '-')) {
78	$k = str_replace('-', '_', $k);
79	$atts[$k] = $v;
80	}
81	}
82	}
83
84	return $instance->getHTML($atts, $content);
85	}
86
87	/**
88	* Wrap Javascript output with common function and tags
89	*
90	* @param string $script JavaScript
91	* @param string $name string name of function
92	*
93	* @return string JavaScript
94	*/
95	protected function wrap_script($script, $name="")
96	{
97	ob_start();
98	?><script>
99	window.WPLeafletMapPlugin = window.WPLeafletMapPlugin \|\| [];
100	window.WPLeafletMapPlugin.push(function <?php echo $name; ?>() {<?php echo $script; ?>});</script><?php
101	return ob_get_clean();
102	}
103
104	/**
105	* Create an LM variable for each shortcode class
106	* instance
107	*/
108	protected function __construct()
109	{
110	$this->LM = Leaflet_Map::init();
111	}
112	}