delete-char deletes marked text sometimes and sometimes not

delete-char deletes marked text sometimes and sometimes not

[Mathias Dahl]

Try this in CVS Emacs:

 $ emacs-22-xyz -q

Type some text and mark it by temporarily activating
transient-mark-mode (C-SPC C-SPC). Press C-d (delete-char). This does
nothing to the text, which was expected (at least for a long-time
Emacs-user... :)

Now type some more text and this time mark the text using the
mouse. Now press C-d again. Voila! Text deleted!

What is this magic? Some "stuff" in the text properties, or what?

/Mathias

Re: delete-char deletes marked text sometimes and sometimes not

[rgb]

> Type some text and mark it by temporarily activating
> transient-mark-mode (C-SPC C-SPC). Press C-d (delete-char). This does
> nothing to the text, which was expected (at least for a long-time
> Emacs-user... :)
>
> Now type some more text and this time mark the text using the
> mouse. Now press C-d again. Voila! Text deleted!
>
> What is this magic? Some "stuff" in the text properties, or what?

Could this be it?

mouse-region-delete-keys's value is
([delete]
 [deletechar])


List of keys which shall cause the mouse region to be deleted.

Defined in `mouse'.

Re: delete-char deletes marked text sometimes and sometimes not

[Mathias Dahl]

"rgb" <rbielaws@i1.net> writes:

> Could this be it?
>
> mouse-region-delete-keys's value is
> ([delete]
>  [deletechar])
>
>
> List of keys which shall cause the mouse region to be deleted.

Aha!

I have no problems with that but it seems to me that it should behave
according to `delete-selection-mode'.

OTOH, the problem is probably me, failing to understand that there is
a difference between a region marked with the mouse and marked using
temporary transient mark mode.

/Mathias

Re: delete-char deletes marked text sometimes and sometimes not

[Stefan Monnier]

> I have no problems with that but it seems to me that it should behave
> according to `delete-selection-mode'.

It predates delete-selection-mode, AFAIK.

> OTOH, the problem is probably me, failing to understand that there is
> a difference between a region marked with the mouse and marked using
> temporary transient mark mode.

For what it's worth I agree with you that it's unintuitive.
Please report it via M-x report-emacs-bug RET (which is not just for bugs
but also for misfeatures, bugs, feature requests, ...).


        Stefan