Hi Xulei, I think you can use nsISelectionPrivate::addSelectionListener [1]. You can get nsISelectionPrivate through QueryInterface on nsISelection, which you can get from nsIEditor.
Cheers, Jim [1] http://mxr.mozilla.org/mozilla-central/source/content/base/public/nsISelectionPrivate.idl#52 On 8/28/13 5:24 AM, "Yuan Xulei(袁徐磊)" wrote: > Hi all, > > I'm implementing b2g keyboard/IME api and encounter a problem > with the selection range observing. > > We want to monitor the cursor position or selection range > changes > in current input element, which is a text input field or a > content > editable element receiving user's input. The cursor position > or the > selection range can be changed by > 1) key events generated by virtual keyboard, > 2) js code, > 3) mouse events triggered by user. > > Currently we listen a pile of events(mousedown, mouseup, > input...) > to check if the selection range has been changed. It is > inefficient > and error prone. > > I wonder if there is a way to monitor the selection range > changes > from chrome js. > > Could anyone give me a clue? > > Thanks. > _______________________________________________ > dev-platform mailing list > dev-platform@lists.mozilla.org > https://lists.mozilla.org/listinfo/dev-platform _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
