On 3/5/25 02:21, Bruce Horrocks wrote:
>> On 4 Mar 2025, at 18:26, Pablo Rodriguez wrote:
>>
>> The first line shows different versions text. I wonder whether there
>> would be an automatic way to get the \inframed highlighting with any
>> character that differs from the other column (it might be different, or
>> just missing or being added).
>
> I'm not aware of anything built-in.
[In short, my previous request intended how to have an automatic
comparison of two versions from the same text automatically done.]
Replying to this message from Bruce, I want to describe what I think it
might do the job.
Since I’m just an average computer user (my background is in
humanities), I thank everyone for comments about whether this make sense
(or not at all).
Not being inclined to reinvent the wheel, after some searching I found
out that "git diff" can do a char-level comparison between two texts:
git diff -U1000 --color-words=. one.md two.md > one-two.diff
[BTW, I use Markdown sources (which pandoc converts to XHTML and ConTeXt
typesets them).]
Since the output contains the coloring commands, I need some
substitutions with:
sed -E -f normal.sed one-two.diff > one-two_normal.diff
The contents of the sed script read:
s/(^[#]{2,3})\x1B\[m$/\1/g
s/\x1B\[(36|1).+?\x1B\[m//g
s/\x1B\[31m/\\Subs{/g
s/\x1B\[32m/\\Add{/g
s/\x1B\[m/}/g
Basically, this script removes info that ConTeXt cannot handle and
translates color codes to \Add and \Subst commands.
This minimal sample:
another te\Subs{x}\Add{s}t
On the left page with the older text, it might have the commands:
\protected\def\Add#1{}
\definehighlight[Subs]
[color=red]
On the right page with the newer version, commands might read:
\definehighlight[Adds]
[color=green]
\protected\def\Subst#1{}
At least, this works with a minimal sample.
Is this a feasible approach? I don’t need the most efficient solution,
just one that I can handle and that just works.
Many thanks in advance for your comments,
Pablo
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