let subdomains be comma-separated; resolves bozdoz#147

class.plugin-settings.php

@@ -231,7 +231,7 @@ private function __construct()
                 'type' => 'text',
                 'helptext' => sprintf(
                     '%1$s %2$s <br/> <code>[leaflet-map subdomains="1234"]</code>',
-                    __('Some maps get tiles from multiple servers with subdomains such as a,b,c,d or 1,2,3,4', 'leaflet-map'),
+                    __('Some maps get tiles from multiple servers with subdomains such as a,b,c or 1,2,3 or cache1,cache2; pass a string where each char is its own subdomain, or pass comma-separated string', 'leaflet-map'),
                     $foreachmap
                 )
             ),

shortcodes/class.map-shortcode.php

@@ -202,6 +202,11 @@ protected function getAtts($atts='')
         $tile_layer_options = $this->LM->filter_empty_string($tile_layer_options);
         $tile_layer_options = $this->LM->filter_null($tile_layer_options);
 
+        if (strpos($tile_layer_options['subdomains'], ',') !== false) {
+            // subdomains can be comma-separated
+            $tile_layer_options['subdomains'] = explode(',', $tile_layer_options['subdomains']);
+        }
+
         $atts['tile_layer_options'] = json_encode($tile_layer_options, JSON_NUMERIC_CHECK | JSON_UNESCAPED_SLASHES);
 
         // TODO: find a better way to do this

templates/shortcode-helper.php

@@ -72,7 +72,7 @@
                     '[leaflet-map zoom=10 lat=48.855 lng=2.35 zoomcontrol !detect-retina]',
                     ),
                 __("Alternate Map Tiles w/scrollwheel", 'leaflet-map') => array(
-                    '[leaflet-map zoom=2 scrollwheel lat=-2.507 lng=32.902 tileurl=https://stamen-tiles-{s}.a.ssl.fastly.net/watercolor/{z}/{x}/{y}.jpg subdomains=abcd attribution="Map tiles by Stamen Design, under CC BY 3.0."]',
+                    '[leaflet-map zoom=2 scrollwheel lat=-2.507 lng=32.902 tileurl=https://stamen-tiles-{s}.a.ssl.fastly.net/watercolor/{z}/{x}/{y}.jpg subdomains=a,b,c,d attribution="Map tiles by Stamen Design, under CC BY 3.0."]',
                     ),
                 __("Marker Popup Messages (on click)", 'leaflet-map') => array(
                     '[leaflet-map lat=59.913 lng=10.739 zoom=12]',