From d14c5bdc9cabf632262067466ef02374cee496cd Mon Sep 17 00:00:00 2001
From: Wu Cheng-Han
Date: Thu, 16 Jul 2015 22:46:06 +0800
Subject: Added document max length limit, enforceMaxLength on change and show
 modal when reach the limit.

---
 lib/ot/editor-socketio-server.js | 1 +
 lib/ot/server.js                 | 7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

(limited to 'lib/ot')

diff --git a/lib/ot/editor-socketio-server.js b/lib/ot/editor-socketio-server.js
index ade8fc52..67920cbf 100755
--- a/lib/ot/editor-socketio-server.js
+++ b/lib/ot/editor-socketio-server.js
@@ -95,6 +95,7 @@ EditorSocketIOServer.prototype.onOperation = function (socket, revision, operati
     try {
         var clientId = socket.id;
         var wrappedPrime = this.receiveOperation(revision, wrapped);
+        if(!wrappedPrime) return;
         //console.log("new operation: " + JSON.stringify(wrapped));
         this.getClient(clientId).selection = wrappedPrime.meta;
         revision = this.operations.length;
diff --git a/lib/ot/server.js b/lib/ot/server.js
index 608d434b..fec3b6f0 100644
--- a/lib/ot/server.js
+++ b/lib/ot/server.js
@@ -1,3 +1,5 @@
+var config = require('../../config');
+
 if (typeof ot === 'undefined') {
   var ot = {};
 }
@@ -28,7 +30,10 @@ ot.Server = (function (global) {
     }
 
     // ... and apply that on the document.
-    this.document = operation.apply(this.document);
+    var newDocument = operation.apply(this.document);
+    // ignore if exceed the max length of document
+    if(newDocument.length > config.documentmaxlength) return;
+    this.document = newDocument;
     // Store operation in history.
     this.operations.push(operation);
 
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