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bug#1120: issues on (put 'insert-date 'delete-selection t)


From: xah lee
Subject: bug#1120: issues on (put 'insert-date 'delete-selection t)
Date: Thu, 9 Oct 2008 00:45:10 -0700

Interesting point.

For elisp programers who wish to write extentions where the command's behaviors change depending on whether user has delete-selection-mode on, what should they do? Check for mark-active and delete-selection- mode before any call to the insert function?

also, the current behavior seems to introduce a complexity, where command behaves differently depending on whether it is invoked by a keybinding or by M-x.

  Xah
∑ http://xahlee.org/

☄

On Oct 8, 2008, at 7:59 PM, Richard M. Stallman wrote:

    according to delete-selection-mode's header file, elisp code that
    insert text that wants to respect delete-selection-mode should set
    the symbol's delete-selection property to true.

    However, this works only when the command is called by a keyboard,
    not by M-x.

    This appears to be a bug?

It's intentional.  This feature implements expectations that users
have for single-character editing operations in other editors,
where those commands don't have names and there's nothing like M-x.
So there's no reason why M-x should delete the region.

It is better for M-x just to call the function.


☄







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