How to get offset position of an annotations

[kevintherm]

So I have this script that supposedly programmatically create an freeText annotations and using createAndAddNewEditor method, it requires offsetX and offsetY as it parameters. I've been wondering how can i get an accurate position of an existing annotations and then use it as a parameter for offsetX and offsetY.

Right now I've been using the rect property as an offsetX and offsetY but it doesn't seems to be accurate.

Im getting the rect property by calling PDFViewerApplication.pdfDocument.annotationStorage.serializable.map

My function

function addTextEditor(pageNum, defaultContent = "unset", offsetX = 0, offsetY = 0) {
    const pageEditorLayer = PDFViewerApplication.pdfViewer._pages[pageNum - 1].annotationEditorLayer.annotationEditorLayer
    pageEditorLayer.pasteEditor(pdfjsLib.AnnotationEditorType.FREETEXT, {})
    
    let editor = pageEditorLayer.createAndAddNewEditor(
        { offsetX, offsetY },true
    );
    editor.setContentText = function (text) {
        console.log(editor.contentDiv)
        editor.contentDiv.innerHTML = "<div>" + defaultContent + "</div>"
    }
    editor.setContentText(defaultContent)

    return editor
}

pdf.js's method createAndAddNewEditor that I tried to use