Question: replaceText/insertText without calling richChanges

[iamgio]

(Hope this is the last issue I'll open here, ahaha)

Basically, I need to do this:

• If I type, for example, '[', it generates '[ ]' and puts caret between them
• If I delete '[', it deletes ']' too

It works using '[' and ']', the problem is doing this with characters like quotes and double quotes, because they are equals.

So, when I type one of those characters, each replaceText calls a new richChanges and throws a StackOverflowError.

So, is there a way to call replaceText/insertText without calling richChanges?

The code below is written in Kotlin, but I think it's pretty readable.
(The onChange method is called inside the richChanges().filter(...).subscribe method.)

fun onChange(change: RichTextChange<Collection<String>, StyledText<Collection<String>>, Collection<String>>, area: CodeArea) {
        if(change.inserted.text == char1.toString()) {
            area.insertText(change.position + 1, c2.toString()) //If I type '[', it generates ']'
        } else if(change.removed.text == char1.toString() && area.text.toCharArray()[change.position] == c2) {
            area.replaceText(change.position, change.position + 1, "") //If I remove '[', it removes ']' too
        }
}

[JordanMartinez]

Ah.... that is a problem...

There's two ways you could potentially solve this.

• The first is probably the easier of the two. You could override the area's InputMap for KeyTyped events to first check whether the inputted character is a " and change it to the actual opening quotes and ending quotes characters: “. Then you'll have to check for that character and add/delete the corresponding ” when you insert/delete one of those characters. The InputMap would continue from there with the default behavior.
• The second is using your own custom UndoManager that handle identity changes differently. If you're not familiar with that FP concept, 0 is the identity change for any number, x, so that x + 0 = x. Your custom UM could ignore all identity changes except when the quotes change occurs.

[iamgio]

Thanks for the reply, I'm going to try. Anyways, do you think these methods might be implemented?

[JordanMartinez]

Probably not since RTFX is meant to be a base upon which others (like yourself) build.