Store list of layouts in settings file as array of enabled
layouts only (up to 4 elements). Optimize code.
Allows sorting of the abbreviations in the globe popup:
just check layouts in the desired order (the first checked
will be northeast).
Requires onetime migration to clean up the settings.
Migrate *global* zoom_mode settings to genus/type, too.
Nothing can actually set this as a global anymore, but we still honored
it nonetheless.
Fix#7778
* Namely, ensure zoom_mode is consistent with genus & type *both ways*. (I only dealt with the "no zoom_mode" case in my original fixup).
Because documents with settings dating back from before the new zoom modes had "old" zoom_mode settings mixed with "new" genus/type defaults that didn't agree with each other.
It lead to super-confusing ConfigDialog behavior, because ConfigDialog was in fact not reflecting the reality.
(As the source of truth is actually `zoom_mode`).
* There was a snafu in manual mode, because of the extremely weird way prefixes are handled by Configurable/ReaderConfig/DocSettings/ConfigDialog.
So, make sure we only have a *single* zoom_factor, and that it's updated and saved properly under the right name everywhere.
Fixes inconsistencies between first swapping to manual mode, and what the ConfigDialog said/did (because again: possibly a lie), vs., re-opening the same document, which would magically use *different* settings, closer to what was expected (but still broken because of the prefix mismatch and a disagreement on defaults between the two variants).
Fallout from #6885
Use a table & table.concat instead of individual concats.
And then use that same table for every hash-related operation.
(Nothing else uses the configurable hash function, otherwise I'd have
limited the table shenanigans to the function itself).
Ought to be faster than our naive array-based approach.
Especially for the glyph cache, which has a solid amount of elements,
and is mostly cache hits.
(There are few things worse for performance in Lua than
table.remove @ !tail and table.insert @ !tail, which this was full of :/).
DocCache: New module that's now an actual Cache instance instead of a
weird hack. Replaces "Cache" (the instance) as used across Document &
co.
Only Cache instance with on-disk persistence.
ImageCache: Update to new Cache.
GlyphCache: Update to new Cache.
Also, actually free glyph bbs on eviction.
* Minor updates to the min & max cache sizes (16 & 64MB). Mostly to satisfy my power-of-two OCD.
* Purge broken on-disk cache files
* Optimize free RAM computations
* Start dropping LRU items when running low on memory before pre-rendring (hinting) pages in non-reflowable documents.
* Make serialize dump the most recently *displayed* page, as the actual MRU item is the most recently *hinted* page, not the current one.
* Use more accurate item size estimations across the whole codebase.
TileCacheItem:
* Drop lua-serialize in favor of Persist.
KoptInterface:
* Drop lua-serialize in favor of Persist.
* Make KOPTContext caching actually work by ensuring its hash is stable.
* Wireless: Optimize memory usage in StreamMessageQueue (use an array of string ropes, that we only concatenate once). Allowed to relax the throttling, making transfers that much faster.
* Persist: Add a "zstd" codec, that uses the "luajit" codec, but compressed via zstd. Since both of those are very fast, it pretty much trounces everything in terms of speed and size ;).
* Persist: Implemented a "writes_to_file" framework, much like the existing "reads_from_file" one. And use it in the zstd codec to avoid useless temporary string interning.
* Metadata: Switch to the zstd codec.
There have been a couple of these this month, and keeping stuff that should only ever run once piling up in their respective module was getting ugly, especially when it's usually simple stuff (settings, files).
So, move everything to a dedicated module, run by reader.lua on startup, and that will actually only do things once, when necessary.
