Issue #1096428: Add protection from missing plugin in Colorbox module scripts....

Issue #1096428: Add protection from missing plugin in Colorbox module scripts. Suggestion and code example from merlinofchaos.

js/colorbox.js

@@ -2,6 +2,9 @@
 
 Drupal.behaviors.initColorbox = {
   attach: function (context, settings) {
+    if (!$.isFunction($.colorbox)) {
+      return;
+    }
     $('a, area, input', context)
       .filter('.colorbox')
       .once('init-colorbox-processed')

js/colorbox_inline.js

@@ -2,6 +2,9 @@
 
 Drupal.behaviors.initColorboxInline = {
   attach: function (context, settings) {
+    if (!$.isFunction($.colorbox)) {
+      return;
+    }
     $.urlParam = function(name, url){
       if (name == 'fragment') {
         var results = new RegExp('(#[^&#]*)').exec(url);

js/colorbox_load.js

@@ -2,6 +2,9 @@
 
 Drupal.behaviors.initColorboxLoad = {
   attach: function (context, settings) {
+    if (!$.isFunction($.colorbox)) {
+      return;
+    }
     $.urlParam = function(name, url){
       var results = new RegExp('[\\?&]' + name + '=([^&#]*)').exec(url);
       if (!results) { return ''; }

js/colorbox_login.js

@@ -2,6 +2,9 @@
 
 Drupal.behaviors.initColorboxLogin = {
   attach: function (context, settings) {
+    if (!$.isFunction($.colorbox)) {
+      return;
+    }
     $("a[href*='/user/login'], a[href*='?q=user/login']", context).once('init-colorbox-login-processed', function () {
       this.href = this.href.replace(/user\/login/,"user/login/colorbox");
     }).colorbox({