code review 4433060: 9term, acme: autoscroll

9term, acme: autoscroll

Ignore scroll/noscroll window setting.
Instead, scroll when the write begins in
or immediately after the displayed window content.

In the new scrolling discipline, executing
"Noscroll" is replaced by typing Page Up or
using the mouse to scroll higher in the buffer,
and executing "Scroll" is replaced by typing End
or using the mouse to scroll to the bottom of
the buffer.

[r, 2011-04-20 21:20:40]

shouldn't you also delete the scroll/noscroll variable as well, then?

[r, 2011-04-20 21:21:46]

a flaw in this is that it is now impossible to disable scrolling in an empty
window, something i do a lot

clear screen
run command to see beginning of error stream

[rsc, 2011-04-20 22:07:55]

> shouldn't you also delete scroll/noscroll

yes, and from win too.  this is just a trial CL.

> a flaw in this is that it is now impossible to disable scrolling in an
> empty window, something i do a lot
>
> clear screen
> run command to see beginning of error stream

this would now be

clear screen
run command
type Home

it's not quite as convenient for that case, i admit.

the case that happens to me is that i leave my windows
in scroll mode but then occasionally a long-running one
produces a steady stream of output that i want to inspect.
before, i had to click Noscroll, scroll up to look around,
then select+click scroll.  now i can just scroll up and
back down.

the question is whether making that case simpler
and eliminating a mode is worth the loss of things
like having a window in noscroll full time.

if you want to try it you can clpatch it into your
tree and rebuild acme.

[r2, 2011-04-20 22:15:07]

i think it's worth rolling out. if we don't like it, we unroll.

-rob

[r2, 2011-04-20 22:15:20]

by the way, i don't know what Home is on my keyboard.

-rob

[rsc, 2011-04-20 22:20:38]

On Wed, Apr 20, 2011 at 18:15, Rob 'Commander' Pike <r@google.com> wrote:
> by the way, i don't know what Home is on my keyboard.

on the mac i think it is fn+left arrow.

[r2, 2011-04-20 22:21:44]

On Apr 20, 2011, at 3:20 PM, Russ Cox wrote:

> On Wed, Apr 20, 2011 at 18:15, Rob 'Commander' Pike <r@google.com> wrote:
>> by the way, i don't know what Home is on my keyboard.
> 
> on the mac i think it is fn+left arrow.

thanks.

why not option or command or control or shift left-arrow?

fn-left arrow? another modifier key i must know.

-rob

[rsc, 2011-04-20 22:23:50]

> thanks.
>
> why not option or command or control or shift left-arrow?
>
> fn-left arrow? another modifier key i must know.

rhetorical i know, but the answer is that fn+ is for
keys that are on large-sized keyboards but not
on the small ones that we have.

[rsc, 2011-04-27 17:18:06]

Hello r, r2,

I'd like you to review this change to
rsc/plan9port

[rsc, 2011-04-27 17:18:13]

*** Submitted as 16d4081236af ***

9term, acme: autoscroll

Ignore scroll/noscroll window setting.
Instead, scroll when the write begins in
or immediately after the displayed window content.

In the new scrolling discipline, executing
"Noscroll" is replaced by typing Page Up or
using the mouse to scroll higher in the buffer,
and executing "Scroll" is replaced by typing End
or using the mouse to scroll to the bottom of
the buffer.

R=r, r2
http://codereview.appspot.com/4433060