Option for waiting for event to trigger

Added an option to allow waiting for the page to say when it's finished rendering.

if options.onTitleDone is set to true, the page will not take the screenshot until the title is set to "done" on the page.

Signed-off-by: Alex Bor <alexhbor@gmail.com>

Author: alexbor

lib/scripts/pdf_a4_portrait.js

@@ -64,10 +64,26 @@ page.onLoadFinished = function (status) {
   }
 
   var filename = options.filename || (options.directory || '/tmp') + '/html-pdf-' + system.pid + '.' + fileOptions.type
-  page.render(filename, fileOptions)
-  system.stdout.write(JSON.stringify({filename: filename}))
 
-  exit(null)
+  takeShot();
+  function takeShot(){
+    var title = page.evaluate(function() {
+      return document.title;
+    });
+
+    if(title.toUpperCase() != "DONE" && options.onTitleDone){
+      window.setTimeout(function () {
+        takeShot();
+      }, 400);
+    } else {
+      page.render(filename, fileOptions)
+      phantom.exit();
+
+      system.stdout.write(JSON.stringify({filename: filename}))
+
+      exit(null)
+    }
+  }
 }
 
 // Returns a hash of HTML content