range updates synchronously as the user drags, but the text behind it does
not exist until the pages it spans have loaded their text. This hook resolves
it in the background and reports isResolving meanwhile, so a status bar can
show the page range immediately and fill in the text when it arrives.
The current text selection.
rangeupdates synchronously as the user drags, but the text behind it does not exist until the pages it spans have loaded their text. This hook resolves it in the background and reportsisResolvingmeanwhile, so a status bar can show the page range immediately and fill in the text when it arrives.