Add the Direct Download link to the page on a UrlFetched event

[GM_direct_download_links.git] / direct_download_links.user.js

diff --git a/direct_download_links.user.js b/direct_download_links.user.js
index a29f81c..418b3a5 100644 (file)
--- a/direct_download_links.user.js
+++ b/direct_download_links.user.js
@@ -27,12 +27,17 @@
 // @include        http://tv.repubblica.it/*
 // @include        http://trovacinema.repubblica.it/*
 // @include        http://www.kataweb.it/tvzap/*
+// @include        http://www.rai.tv/*
 // ==/UserScript==
+//
+// NOTE, for rai.tv to work you need to install a script like:
+// http://git.ao2.it/smooth-dl.git/blob_plain/HEAD:/scripts/SilverSpoof.user.js
 
 /*
  * TODO:
  *  - find a way to use the same string as in the @include lines to match the
- *    current window.location
+ *    current window.location. Look for something like GM_testUrl() which builds
+ *    the regexp starting from a glob line.
  *  - use xpath instead of regexp like in http://a32.me/2009/11/greasemonkey/
  *  - use jquery, like shown in http://a32.me/2009/11/greasemonkey/
  */
@@ -48,7 +53,14 @@
  *
  *
  * Optional fields:
- *   TODO
+ *   onEvent: used to delay the urlRegexp matching to a certain event like
+ *            'DOMNodeInserted' useful when the URL is added by some javascript
+ *            library. It has two fields:
+ *
+ *              evt: the event we want to wait for (e.g. 'DOMNodeInserted')
+ *
+ *              targetElement: the element in the event handler we want the
+ *                urlRegexp is performed on.
  *
  */
 var supported_sites = [
@@ -76,6 +88,13 @@ var supported_sites = [
     urlRegexp: /'pcUrl', '((http|mms):\/\/[^']*)'/,
     linkDest: 'playerCont',
   },
+  {
+    locationRegexp: /^http:\/\/www\.rai\.tv\/.*$/,
+    urlContainer: 'Player',
+    urlRegexp: /mediaUri=(http:\/\/[^,]*)/,
+    onEvent: { evt: 'DOMNodeInserted', targetElement: 'object' },
+    linkDest: 'Player',
+  },
 ];
 
 /* Apply different rules to different sites */
@@ -84,10 +103,7 @@ for (i = 0; i < supported_sites.length; i++) {
 
   var result = window.location.href.match(site.locationRegexp);
   if (result) {
-    var ret = direct_download_link_add(window.location.href, site);
-    if (!ret) {
-      DDL_log('Cannot add the link');
-    }
+    direct_download_link_add(window.location.href, site);
   }
 }
 
@@ -105,23 +121,57 @@ function direct_download_link_add(pageURL, site) {
     return null;
   }
 
+  document.addEventListener('UrlFetched', _add_link, true);
+
+  // This is used for sites adding the URL to the DOM after DOMContentLoaded,
+  // for example by some javascript library (like Silverlight.js on rai.tv).
+  if (site.onEvent) {
+    element.addEventListener(site.onEvent.evt, function(e) {
+      if (site.onEvent.targetElement &&
+          e.target.tagName.toLowerCase() != site.onEvent.targetElement) {
+        DDL_log('DirectDL (' + site.pageURL  + '): skipping element ' + e.target.tagName);
+        return;
+      }
+     _get_URL(site, element);
+    }, false);
+  }
+
+  _get_URL(site, element);
+}
+
+function _get_URL(site, element) {
   var content = element.innerHTML;
   if (!content) {
     DDL_log('DirectDL (' + site.pageURL + '): content is null, cannot find URL.');
-    return null;
+    return;
   }
 
   var matches = content.match(site.urlRegexp);
   if (!matches || matches.length < 2 || !matches[1]) {
       DDL_log('DirectDL (' + site.pageURL + '): URL not found, check the urlRegexp');
-      return null;
+      return;
   }
   var URL = matches[1];
+  if (!URL) {
+    DDL_log('DirectDL (' + site.pageURL + '): cannot get the URL.');
+    return;
+  }
+
+  var evt = document.createEvent('Event');  
+  evt.initEvent('UrlFetched', true, true);  
+  evt.site = site;
+  evt.URL = URL;
+  document.dispatchEvent(evt);
+}
+
+function _add_link(e) {
+  var site = e.site;
+  var URL = e.URL;;
 
   var links = document.getElementById(site.linkDest);
   if (!links) {
     DDL_log('DirectDl (' + site.pageURL + '): Cannot add the direct download link.');
-    return null;
+    return;
   }
 
   var download_link = document.createElement('a');
@@ -134,8 +184,6 @@ function direct_download_link_add(pageURL, site) {
   download_link.setAttribute('style', style);
 
   links.insertBefore(download_link, links.firstChild);
-
-  return true;
 }
 
 function DDL_log(message) {