Disable a single line (or many) instead of the whole file

[jhammond2012]

Has anyone tried to disable a single line or many instead of the whole file?

I tried creating a "ViewPlugin" but I caused more issues than I started with.

const disableSingleLine = ViewPlugin.fromClass(class {
...    
});

[jaywcjlove]

Yes, it is possible to disable a single line or many in CodeMirror v6 by using the rangeset API. Here's an example of how to do it:

import React from 'react';
import CodeMirror from '@uiw/react-codemirror';
import { javascript } from '@codemirror/lang-javascript';
import { EditorView, highlightLineRange } from "@codemirror/view";
import { RangeSet } from "@codemirror/rangeset";

const lineToDisable = 5; // Replace with the line number you want to disable

// Create a RangeSet that disables the specified line
const rangeSet = RangeSet.of([{
  from: lineToDisable,
  to: lineToDisable + 1,
  mode: "disabled" // Disable the line
}]);

function App() {
  const onChange = React.useCallback((value, viewUpdate) => {
    console.log('value:', value);
  }, []);

  const ref = useRef();

  const update = () => {
    // Alternatively, you can update the RangeSet of an existing EditorView:
    ref.current.view.dispatch({
      effects: rangeSet.addEffect(),
    });
  }
  return (
    <CodeMirror
      value="console.log('hello world!');"
      height="200px"
      ref={ref}
      extensions={[
        javascript({ jsx: true }),
        // Add other extensions here
        rangeSet
      ]}
      onChange={onChange}
    />
  );
}

@jhammond2012

[jhammond2012]

@jaywcjlove wow, thanks for the quick reply. I am getting a new error:

This is my code:

import React from "react";
import CodeMirror from "@uiw/react-codemirror";
import { rust } from "@codemirror/lang-rust";
import { EditorView } from "codemirror";
import { RangeSet } from "@codemirror/rangeset";

const lineToDisable = 1;

const rangeSet = RangeSet.of([
  {
    from: lineToDisable,
    to: lineToDisable + 1,
    mode: "disabled", // Disable the line
  },
]);

function Learn() {
  const code = `[package]
name = "hello-world"
version = "0.1.0"
edition = "2021"`;

  const onChange = React.useCallback((value, viewUpdate) => {
    console.log("value:", value);
  }, []);

  return (
    <div>
      <CodeMirror
        value={code}
        className="rounded-tl-lg rounded-bl-lg"
        height="100%"
        theme="dark"
        extensions={[EditorView.lineWrapping, rust(), rangeSet]}
        onChange={onChange}
      />
    </div>
  );
}

export default Learn;

Thanks so much for your help!

[jhammond2012]

Maybe it has been deprecated: https://www.npmjs.com/package/@codemirror/rangeset/v/0.19.2

[jaywcjlove]

https://discuss.codemirror.net/t/how-to-enable-and-disable-specific-lines-in-v6/4521/2