There is a Text control bound to a model with WidgetProperties.text(). I'm going to promote it to TextViewer. TextViewer uses IDocument as its input, so WidgetProperties.text() seems to be inapplicable now. How do I keep the text in the control bound to my model?
I don't think there is anything for observing IDocument.
TextViewer uses the StyledText control to present the text, use TextViewer.getTextWidget() to access. WidgetProperties.text() supports observing StyledText.