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Re: How to fontify region according to mode
From: |
Dan Davison |
Subject: |
Re: How to fontify region according to mode |
Date: |
Sat, 14 Aug 2010 14:08:36 -0400 |
User-agent: |
Gnus/5.110011 (No Gnus v0.11) Emacs/23.2 (gnu/linux) |
Lennart Borgman <lennart.borgman@gmail.com> writes:
> On Sat, Aug 14, 2010 at 7:14 PM, Dan Davison <davison@stats.ox.ac.uk> wrote:
>> I want to write a function to fontify a region according to a certain
>> mode, and I tried the following tactic (see function below):
>>
>> - get the value of `font-lock-defaults' from a buffer in the target mode
>> and bind it inside a let
>> - bind a bunch of other font-lock variable names to stop them being
>> overwritten
>> - call `font-lock-set-defaults'
>> - call `font-lock-fontify-region'
>>
>> It didn't seem to work. Could someone suggest how to alter this so that
>> it works, or is this approach fundamentally flawed?
>>
>> (defun dan/font-lock-fontify-region (mode start end)
>> (let ((font-lock-defaults
>> (with-temp-buffer
>> (funcall mode)
>> font-lock-defaults))
>> font-lock-keywords
>> font-lock-keywords-only
>> font-lock-keywords-case-fold-search
>> font-lock-syntax-table
>> font-lock-beginning-of-syntax-function)
>> (font-lock-set-defaults)
>> (font-lock-fontify-region start end)))
>>
>>
>> I want the rest of the buffer to remain unaltered and, for now, I'm not
>> looking for a solution involving mumamo/multi-mode etc.
>
>
> If you want to see how it works then look in mumamo.el. I think you
> will find the answers to your questions there. (But why do you want to
> reinvent the wheel? What is the purpose?)
Hi Lennart,
I was looking at mumamo.el earlier today, but it is 9,101 lines long, so
I would definitely appreciate some guidance. Note that I don't want
different regions to be subject to different major modes; I only want to
change the text properties in a region. That was why I was not using
mumamo and was attempting the simple approach above. I would certainly
consider mumamo if I wanted multiple major modes.
Dan