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Re: Fwd: overlay face property not used for after-string property
From: |
David Kastrup |
Subject: |
Re: Fwd: overlay face property not used for after-string property |
Date: |
Mon, 05 Nov 2007 16:04:24 +0100 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/23.0.50 (gnu/linux) |
Stefan Monnier <address@hidden> writes:
>> I think that the before-string should, in effect, use
>> (get-char-property (overlay-start ov) 'face)
>> to determine the face to use if no fully specified face is in the
>> before-string.
>
> No. Go read the beginning of this thread again where I explained
> why this is bad: it's (much) harder to remove a face than to add
> one.
Then our problem is that it is much harder to remove a face than to
add one. And that is the problem we should fix.
> Also text-properties should not affect before/after-strings.
I don't see why not if they are appropriately sticky.
> I believe the most obviously sensible rule is to follow the
> precedence that we always use: - overlays take precedence over
> text-properties - overlays of higher priority take precedence over
> overlays of lower priority - for overlays of equal priority if one
> overlay covers the other it takes precedence - for the other cases
> of equal priority, any arbitrary choice is OK as long as it's
> deterministic
>
> Given this, a (before|after)-string should only be affected by
> invisible|face properties set by overlays of higher precedence: not
> by text-properties, not be overlays of lower precedence.
Resolving partially specified faces goes through priorities. If there
are usage cases for before/after-string that should not inherit, then
we need to add a way to say "completely resolve to 'default (or
whatever other face) here". Then things like lineno can use that way.
But it does not make sense to substitute a missing facility with some
fixed but illogical rules that cater for some but not all use cases
because it is easier to override this in that manner.
--
David Kastrup
- Re: Fwd: overlay face property not used for after-string property, (continued)
- Re: Fwd: overlay face property not used for after-string property, Richard Stallman, 2007/11/05
- Re: Fwd: overlay face property not used for after-string property, Joe Wells, 2007/11/05
- Re: Fwd: overlay face property not used for after-string property, Stefan Monnier, 2007/11/06
- Re: Fwd: overlay face property not used for after-string property, David Kastrup, 2007/11/06
- Re: Fwd: overlay face property not used for after-string property, Stefan Monnier, 2007/11/06
- Re: Fwd: overlay face property not used for after-string property, Richard Stallman, 2007/11/06
- Re: Fwd: overlay face property not used for after-string property, Richard Stallman, 2007/11/06
- Re: Fwd: overlay face property not used for after-string property, Richard Stallman, 2007/11/05
- Re: Fwd: overlay face property not used for after-string property, Joe Wells, 2007/11/05
- Re: Fwd: overlay face property not used for after-string property, Stefan Monnier, 2007/11/05
- Re: Fwd: overlay face property not used for after-string property,
David Kastrup <=
- Re: Fwd: overlay face property not used for after-string property, Joe Wells, 2007/11/05
- Re: Fwd: overlay face property not used for after-string property, David Kastrup, 2007/11/05
- Re: Fwd: overlay face property not used for after-string property, Joe Wells, 2007/11/05
- Re: Fwd: overlay face property not used for after-string property, Joe Wells, 2007/11/05
- Re: Fwd: overlay face property not used for after-string property, Stefan Monnier, 2007/11/05
- Re: Fwd: overlay face property not used for after-string property, Joe Wells, 2007/11/05
- Re: Fwd: overlay face property not used for after-string property, Richard Stallman, 2007/11/06
- Re: Fwd: overlay face property not used for after-string property, Richard Stallman, 2007/11/05
- Re: Fwd: overlay face property not used for after-string property, Joe Wells, 2007/11/05
- Re: Fwd: overlay face property not used for after-string property, Richard Stallman, 2007/11/05