Copy and paste only from Ace editor

[krishnagogada]

We want to keep a feature in our platform that users can copy or paste only from the Ace editor.
If the user copies a text from outside the ace editor and tries to paste it into the Ace editor it should not work, and if the user copy from the ace editor it should work.

Is that possible?

[nightwing]

You can use paste and copy events

var lastCopiedText = ""
editor.on("paste", function(e) {
    if (lastCopiedText != e.text) {
        alert(`
             An attempt to paste text not copied from the editor is detected.
             And it will not be tolerated!
             Use browser developer tools to circumvent this annoyance.
        `)
    }
    e.text = lastCopiedText
})
editor.on("copy", function(e) {
    lastCopiedText = e.text
})