Firefox createLink bug workaround

This fix workarounds FireFox createLink bug.
Ref: https://bugzilla.mozilla.org/show_bug.cgi?id=451142

Author: apptaro

src/js/core.js

@@ -1149,6 +1149,7 @@
                             this.importSelection(exportedSelection);
                         } else {
                             this.options.ownerDocument.execCommand('createLink', false, targetUrl);
+                            MediumEditor.util.ensureHref(MediumEditor.selection.getSelectionStart(this.options.ownerDocument), targetUrl);
                         }
 
                         if (this.options.targetBlank || opts.target === '_blank') {

src/js/util.js

@@ -572,6 +572,25 @@
             return doc.execCommand('formatBlock', false, tagName);
         },
 
+        /*
+         * this function is called to ensure href is set correctly as FF does "encodeURI" on href value when execCommand createLink.
+         * see also https://bugzilla.mozilla.org/show_bug.cgi?id=451142
+         */
+        ensureHref: function (el, anchorUrl) {
+            var i, url = anchorUrl;
+            if (el.nodeName.toLowerCase() === 'a') {
+                el.attributes.href.value = url;
+            } else {
+                el = el.getElementsByTagName('a');
+
+                for (i = 0; i < el.length; i += 1) {
+                    if (encodeURI(url) === el[i].attributes.href.value) {
+                        el[i].attributes.href.value = url;
+                    }
+                }
+            }
+        },
+
         /**
          * Set target to blank on the given el element
          *