caret and anchor stale after selectRange with listeners

If you attempt to use selectRange to update caret and anchor positions that have attached listeners, the caret and anchor potitions will be stale.

@Test fun `sscce`(){
    val underTest = StyleClassedTextArea()

    //comment out this line of code and the test passes
    val dontCare = Bindings.createStringBinding(Callable { "binded" }, underTest.caretPositionProperty(), underTest.anchorProperty())
    underTest.appendText("asdf")
    
    //act
    underTest.selectRange(1, 2)

    //assert
    assertThat(underTest.selectedText).isEqualTo("s") //OK
    assertThat(listOf(underTest.anchor, underTest.caretPosition)).isEqualTo(listOf(1, 2)) //fail
    //actual: 0, 2
}

[Groostav]

@Jugen No I did mean anchor position. The caret appears to be working correctly.

Firstly: the use case is to have a richTextFX text area, with a couple of labels bound to metadata about that text areas selection --a pretty common thing if you look at gedit or notepad++.

I’ve found that if I leave my selection-listeners on the text area it changes the behaviour of the text area. Text selection with the mouse becomes stunted and heavily prone to artificially moving the caret to the end of the document or the anchor to the beginning of the document. This is what lead to the original report. Since your fix the behaviour got better but it is not corrected. If I leave my selection-listeners on the text area, I still find it selecting the wrong ranges frequently.

I have tried to get this down to an SSCCE but have had difficulty.

But I have found a workaround: rather than bind to the anchorProperty and the caretPositionProperty, I’m simply binding to the selectedTextProperty.

I still need to do some work here, I’ll let you know when I’ve got something reasonably actionable for you, but this one is tricky to run down.

probably what an “SSCCE” is going to look like is a live UI with some console output, and then a statement that “this console output should not be here”.

[Jugen]

Umm, did you maybe mean caret position and not anchor position ? Otherwise can you provide more information.