v3git-gui: Handle Ctrl + BS/Del in the commit msg

> From: Ismael Luceno <ismael.luceno@tttech-auto.com>
> 
> - Control+BackSpace: Delete word to the left of the cursor.
> - Control+Delete   : Delete word to the right of the cursor.
> 
> Originally introduced by BRIEF and Turbo Vision between 1985 and 1992,
> they were adopted by most CUA-Compliant UIs, including those of: OS/2,
> Windows, Mac OS, Qt, GTK, Open/Libre Office, Gecko, and GNU Emacs.
> 
> In both cases Tk already implements the functionality bound to other key
> combination, so we use that.
> 
> Graphical examples:
> 
> Deleting to the left:
>         v------ pointer
> X_WORD____X
>   ^-----^------ selection
> 
> Deleting to the right:
>   v--------- pointer
> X_WORD_X
>   ^--^------ selection
> 
> Signed-off-by: Ismael Luceno <ismael.luceno@tttech-auto.com>
> 
> ---
> I'm re-submitting the patch after >1 year.
> 
> CC: Junio C Hamano <gitster@pobox.com>
> CC: "brian m. carlson" <sandals@crustytoothpaste.net>
> CC: Pat Thoyts <patthoyts@users.sourceforge.net>
> CC: Johannes Schindelin <Johannes.Schindelin@gmx.de>
> 
> Notes:
>     Changes since v2:
>     - Reimplemented via existing events, which correctly delete spaces.
>     - Further improved commit message.
>     
>     Changes since v1:
>     - Improved commit message.
> 
>  git-gui/git-gui.sh | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/git-gui/git-gui.sh b/git-gui/git-gui.sh
> index 6de74ce639..c4e0270626 100755
> --- a/git-gui/git-gui.sh
> +++ b/git-gui/git-gui.sh

> @@ -3812,6 +3812,8 @@ bind $ui_comm <$M1B-Key-KP_Subtract> {show_less_context;break}
>  bind $ui_comm <$M1B-Key-equal> {show_more_context;break}
>  bind $ui_comm <$M1B-Key-plus> {show_more_context;break}
>  bind $ui_comm <$M1B-Key-KP_Add> {show_more_context;break}
> +bind $ui_comm <Control-Key-BackSpace> {event generate %W <Meta-Delete>;break}
> +bind $ui_comm <Control-Key-Delete> {event generate %W <Meta-d>;break}

> Hi Ismael,
> 
> On 12/05/20 12:28PM, Ismael Luceno wrote:
> > From: Ismael Luceno <ismael.luceno@tttech-auto.com>
> > 
> > - Control+BackSpace: Delete word to the left of the cursor.
> > - Control+Delete   : Delete word to the right of the cursor.
> > 
> > Originally introduced by BRIEF and Turbo Vision between 1985 and 1992,
> > they were adopted by most CUA-Compliant UIs, including those of: OS/2,
> > Windows, Mac OS, Qt, GTK, Open/Libre Office, Gecko, and GNU Emacs.
> > 
> > In both cases Tk already implements the functionality bound to other key
> > combination, so we use that.
> > 
> > Graphical examples:
> > 
> > Deleting to the left:
> >         v------ pointer
> > X_WORD____X
> >   ^-----^------ selection
> > 
> > Deleting to the right:
> >   v--------- pointer
> > X_WORD_X
> >   ^--^------ selection
> > 
> > Signed-off-by: Ismael Luceno <ismael.luceno@tttech-auto.com>
> > 
> > ---
> > I'm re-submitting the patch after >1 year.
> > 
> > CC: Junio C Hamano <gitster@pobox.com>
> > CC: "brian m. carlson" <sandals@crustytoothpaste.net>
> > CC: Pat Thoyts <patthoyts@users.sourceforge.net>
> > CC: Johannes Schindelin <Johannes.Schindelin@gmx.de>
> > 
> > Notes:
> >     Changes since v2:
> >     - Reimplemented via existing events, which correctly delete spaces.
> >     - Further improved commit message.
> >     
> >     Changes since v1:
> >     - Improved commit message.
> > 
> >  git-gui/git-gui.sh | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/git-gui/git-gui.sh b/git-gui/git-gui.sh
> > index 6de74ce639..c4e0270626 100755
> > --- a/git-gui/git-gui.sh
> > +++ b/git-gui/git-gui.sh
> 
> You based the patch on top of the Git tree. Since Git Gui is maintained 
> separate from Git, patches are expected to be based on top of the Git 
> Gui tree [0]. I fixed it up and applied the patch on my tree.
> 
> > @@ -3812,6 +3812,8 @@ bind $ui_comm <$M1B-Key-KP_Subtract> {show_less_context;break}
> >  bind $ui_comm <$M1B-Key-equal> {show_more_context;break}
> >  bind $ui_comm <$M1B-Key-plus> {show_more_context;break}
> >  bind $ui_comm <$M1B-Key-KP_Add> {show_more_context;break}
> > +bind $ui_comm <Control-Key-BackSpace> {event generate %W <Meta-Delete>;break}
> > +bind $ui_comm <Control-Key-Delete> {event generate %W <Meta-d>;break}
> 
> Don't use "Control" directly to maintain compatibility with MacOS. Use 
> $M1B like the surrounding code does. I fixed it up locally, so no need 
> to send in a new version. You can find the fixed up version here [1]. 
> Test it if you'd like.
> 
> Will merge it in. Thanks.

> From: Ismael Luceno <ismael.luceno@tttech-auto.com>
> 
> - Control+BackSpace: Delete word to the left of the cursor.
> - Control+Delete   : Delete word to the right of the cursor.
> 
> Originally introduced by BRIEF and Turbo Vision between 1985 and 1992,
> they were adopted by most CUA-Compliant UIs, including those of: OS/2,
> Windows, Mac OS, Qt, GTK, Open/Libre Office, Gecko, and GNU Emacs.
> 
> In both cases Tk already implements the functionality bound to other key
> combination, so we use that.
> 
> Graphical examples:
> 
> Deleting to the left:
>         v------ pointer
> X_WORD____X
>   ^-----^------ selection
> 
> Deleting to the right:
>   v--------- pointer
> X_WORD_X
>   ^--^------ selection
> 
> Signed-off-by: Ismael Luceno <ismael.luceno@tttech-auto.com>