better handle urls

app/View/CollapsibleTextBoxWidget.php

@@ -50,7 +50,14 @@ class CollapsibleTextBoxWidget
 
         $out = nl2br($out);
 
-        $out = preg_replace('|(https?://[^\s]+)|i', '<a href="\1">\1</a>', $out);
+        $out = preg_replace_callback('#\b((https?://|ftp://|mailto:)[^\s]+)#i', function($m) {
+            $href = $m[1];
+            $text = $href;
+            if (strpos($text, 'mailto:') === 0) {
+                $text = str_replace('mailto:', '', $text);
+            }
+            return "<a href=\"".e($href)."\">".e($text)."</a>";
+        }, $out);
 
         return $out;
     }
@@ -67,7 +74,9 @@ class CollapsibleTextBoxWidget
         }
 
         if ($this->collapsing) {
-            return '<div class="block-collapse" style="max-height:'.$this->maxHeight.'">' . $prefix . $content . '</div>';
+            return '<div class="block-collapse" 
+                         title="Click to expand / Double-click to collapse"
+                         style="max-height:'.$this->maxHeight.'">' . $prefix . $content . '</div>';
         } else {
             return $prefix.'<div>' . $prefix . $content . '</div>';
         }

app/View/WidgetFactory.php

@@ -31,6 +31,23 @@ class WidgetFactory
             "</div>";
     }
 
+    /**
+     * Convert the given string to a-href if it is a link.
+     *
+     * @param $href
+     * @return string
+     */
+    public function tryLink($href)
+    {
+        $href = trim($href);
+        if (starts_with($href, ['http://', 'https://', 'mailto:', 'ftp://'])) {
+            $href_e = e($href);
+            return "<a href=\"".$href_e."\">".$href_e."</a>";
+        } else {
+            return $href;
+        }
+    }
+
     public function collapsible($text, $thrSize, $maxHeight)
     {
         return new CollapsibleTextBoxWidget($text, $thrSize, $maxHeight);