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From: | Dmitry Gutov |
Subject: | bug#41897: 28.0.50; JavaScript comment filling with mhtml-mode |
Date: | Tue, 23 Jun 2020 20:59:22 +0300 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 |
Hi Alan, On 23.06.2020 19:28, Alan Mackenzie wrote:
So it's really fine if it's called from HTML/CSS hunks as well?Not only fine, but necessary. The literal cache contains entries that record things like "C comment between positions 23 and 130". If somebody inserts text before that comment, or inside of it, that cache entry is no longer valid, and must be invalidated. Hence the necessity of the before-change function.
But isn't CC Mode confused by chunks of text with a totally different syntax?
And there's no way to just "reset" it to an appropriate value?No. Not without killing its utility as a cache.
What do you mean? Even if the cache is reset at the beginning of a function, if the function refers to it multiple times, the first time should refill the cache, and the rest of the calls will be able to make use of it properly.
This way, I think it would automatically make it compatible with mmm-mode. Or at least more compatible.Maybe putting the two c-foreign-* functions into mmm-mode would work.mmm-mode is a minor mode, it doesn't always deal with CC Mode.The question to consider here is whether any sub-mode of mmm-mode uses CC Mode's comment filling without initialising CC Mode. js-mode and mhtml-mode do this.
js-mode can be one of its submodes. c-mode as well, but none of CC Mode family of major modes ever worked okay with it, I think.
js-mode mostly works, aside from features like this one.
Have you considered adding variables that hold the cache to mhtml--crucial-variable-prefix as well? Would that make it work?Not without the before-change function, no. I'm trying to see what the point of putting these variables into mhtml's crucial variables would be.
Hopefully, it would make the submode regions inside independent "islands", so to speak. Each of them having its own cache structure (used or not).
TBH I'm not sure if mhtml-mode does the save-and-restore dance which would be necessary for this. mmm-mode does, though.
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