Firefox addon - how to listen to a text highlight event in a webpage

问题

I am writing an addon which needs to do capture the no of times someone has highlighted any text on a webpage. Is there any way I can listen to this event?

Thanks, Kapil

回答1:

There is not a particular event for this. But you can listen to the mouseup event and check whether the selection returned by window.getSelection() is not empty and/or whether it differs from the previous selection.

回答2:

You could add a selection listener. The Source window (viewSource.js) does this so that it can keep the row and column number up-to-date.

来源：https://stackoverflow.com/questions/4619298/firefox-addon-how-to-listen-to-a-text-highlight-event-in-a-webpage