From: "Clément Pit-Claudel" <cpitclaudel@gmail.com>
To: emacs-devel@gnu.org
Subject: Re: Question: add-face-text-property for 'font-lock-face?
Date: Sun, 29 Aug 2021 12:15:58 -0400 [thread overview]
Message-ID: <5cf80cca-828a-614c-9cb4-d478a04c05f5@gmail.com> (raw)
In-Reply-To: <835yvon11g.fsf@gnu.org>
On 8/29/21 3:49 AM, Eli Zaretskii wrote:
>> From: Qiantan Hong <qhong@mit.edu>
>> CC: "emacs-devel@gnu.org" <emacs-devel@gnu.org>
>> Date: Sun, 29 Aug 2021 07:19:03 +0000
>>
>> I need to add some face attribute to a range of text.
>> And in case that font-lock-mode is active, the attribute needs to be
>> added to ‘font-lock-face instead of ‘face text property.
>>
>>> I don't think I understand well enough what you want to do, but in
>>> general, you change a face's attribute by using set-face-attribute.
>> That doesn’t seem to work for anonymous faces.
>> I don’t want to globally modify other modes’ faces,
>> I want to add some attribute over some range of text.
>>
>> add-face-text-property seems to exactly do this,
>> but it’s hardcoded for ‘face property in C code
> A face property is just a list of keyword-value pairs, so adding an
> attribute to the list should be trivial, no? Or what am I missing?
You still need to iterate over regions of continuous text properties; it's not a complicated program, but it's not trivial either.
(Qiantan is hoping to preserve existing font-lock faces and append the CRDT.el face to them, AFAIU; so, it's a bit more work than appending to one list: you need to iterate over the region of interest, and append to each list of faces).
And if I understand correctly, then font-lock-append-text-property should fit the bill nicely.
next prev parent reply other threads:[~2021-08-29 16:15 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-29 4:13 Question: add-face-text-property for 'font-lock-face? Qiantan Hong
2021-08-29 4:24 ` Yuan Fu
[not found] ` <B73E855F-7E55-4217-BD43-E1272939E491@mit.edu>
2021-08-29 4:36 ` Qiantan Hong
2021-08-30 8:22 ` Ihor Radchenko
[not found] ` <945E4D23-3D8C-45AB-9C10-992638A30607@gmail.com>
2021-08-29 4:47 ` Qiantan Hong
2021-08-29 23:50 ` Stefan Monnier
2021-08-29 7:05 ` Eli Zaretskii
2021-08-29 7:19 ` Qiantan Hong
2021-08-29 7:49 ` Eli Zaretskii
2021-08-29 16:15 ` Clément Pit-Claudel [this message]
2021-08-29 21:13 ` Qiantan Hong
2021-08-29 23:47 ` Stefan Monnier
2021-08-30 0:41 ` Qiantan Hong
2021-08-30 8:18 ` Ihor Radchenko
2021-08-29 16:13 ` Clément Pit-Claudel
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