![]() Therefore, maintaining OT code is difficult. The most difficult part of OT is not the code, but the difficulty in proving that your system is correct. ![]() This way we’ll get the same result at the end of the transformation and for every changes we made we will apply that with the last sync value.įor this project, I have used CKEditor 5 diffToChanges util to check the changes(operations) from sync state and then apply in the editor. The states are synchronized for both the user. The transformation will be, For User 1, String -> O2 -> O1 To add transformation, we have to apply both these changes to the string. O2 = įor User 1, local operation is O1 and incoming change operation is O2įor User 2, local operation is O2 and incoming change operation is O1 Let’s say we have a text CA and two different user is doing operation Let’s look at a example of operational transform. Wave took 2 years to write and if we rewrote it today, it would take almost as long to write a second time. The algorithms are really hard and time consuming to implement correctly. There’s a million algorithms with different tradeoffs, mostly trapped in academic papers. There is a famous quote by Joseph Gentle, one of the early people implemented OT Implementing OT is something complex which takes a lot of time to implement and be good at. OT was originally invented for consistency maintenance and concurrency control in collaborative editing of plain text documents. Operational transformation (OT) is a technology for supporting a range of collaboration functionalities in advanced collaborative software systems. The most popular of them is operational transform. There are many algorithms to solve this issue in certain extent, but they have different pros and cons in different situations. When multiple user changing same text at a time can cause conflict which has to resolve in terms of real time collaboration. The most critical of them is conflict resolution. In terms of collaborative editing we can face different type of issues. Register.addEventListener( 'click', registerUserListener) Return (elem) Ĭonst editorBlock = document.getElementById( 'editor-block') ![]() Li.appendChild( document.createTextNode(writer.name)) Var ul = document.getElementById( "editors") 1Ĭonst handle = document.getElementById( 'handle') Ĭonst register = document.getElementById( 'register') Res.sendFile( 'index.html', ) Īdd a list node to show all the connected users. 1Īpp.use( '/public', express.static( 'public')) Ĭonst fileDirectory = path.resolve(_dirname) If we store the document user specific then this step is completely unnecessary. I’ve added a redirection in the root endpoint to generate document id and load the html. For operational trasform I’ve used the CKEditor 5 diff library to adapt changes to the editor.įirst we need a Node.js server which will host our application server and respond the front end in root endpoint.Let’s define some project requirement to start on Obviously, there are scopes for improvement and please share your ideas which will give better insights. So I tried developing a POC(Proof of concept) which can handle real-time editing and went through some ideas to make this solution scalable. I planned to design and develop such a system which can handle basic text editing and can scale on need. There are so many tools out there providing such features with great excellence such as Google Doc, Microsoft word etc. A text editor can be a real game changer when it’s equipped with the functionality of collaborative editing.
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