[Vm-dev] [SqueakJS] keyboard handling

[Nicolai Hess]

2016-01-04 21:51 GMT+01:00 Bert Freudenberg <bert at freudenbergs.de>:

>
> On 03.01.2016, at 14:32, Nicolai Hess <nicolaihess at gmail.com> wrote:
> >
> > Hi Bert,
> >
> > following observation:
> >
> > in squeak.js,
> >     document.onkeypress = function(evt) {
> >         if (!display.vm) return true;
> >         // check for ctrl-x/c/v/r
> >         if (/[CXVR]/.test(String.fromCharCode(evt.charCode + 64)))
> >
> > this test never holds (at least not with firefox on windows).
> > The charCode is always the same, regardless whether ctrl-key is pressed
> or not, so it always handles those
> > shortcuts as squeak-shortcuts (ctrl+v is handled as "paste author
> initials", not as "paste text to browser window")
> > (this is not an issue for chrome, because it does not use keypress, but
> the keydown events for cut&paste)
> >
> > changing this to
> >
> >         if (evt.ctrlKey &&
> /[cxvr]/.test(String.fromCharCode(evt.charCode)))
> > makes it working.
> >
> > another issue is, that in firefox on windows, the "paste event" is never
> fired for non-editable htmlelements (it works for textareas and
> inputfields).
> > But we can make the whole document "editable" with
> > document.body.contentEditable = true
> > (maybe it is enough to do this for the canvas elemement).
> >
> > with this changes, copy , cut & paste are working in firefox (only
> tested on windows).
>
> We may have to make this browser-dependent :(
>

I was afraid of that.
Maybe this "trick" will work:

http://andrewduthie.com/2015/08/29/capturing-a-paste-event-in-firefox/
adding somewhere a nonvisible div area with contentEditable=true.


>
> If we make the canvas content-editable then on iOS the browser will zoom
> into the canvas as soon as you tap it … which OTOH may not be worse than
> what we have now (but I do remember some problem which led me to disabling
> it again).
>
> Fabio started working on real keyboard support for touch devices but it’s
> not finished yet, see https://github.com/bertfreudenberg/SqueakJS/pull/42
>

looks interesting.


>
> - Bert -
>
>
>
>
>
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