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fix(fonts): unloading a plugin forgets its manifest fonts (#757)

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* fix(fonts): unloading a plugin forgets its manifest fonts

PluginManager.unload_plugin() and the failed-load cleanup only called
FontManager.forget_manager_fonts(), which drops usage data. The plugin's
manifest registrations stayed: plugin_fonts / plugin_font_catalogs, its
plugin_id::family entries in font_catalog, and cached font objects for them
-- so its fonts kept resolving after unload and a family a reinstalled
manifest dropped stayed registered. The deprecated unregister_plugin_fonts
did this cleanup but nothing called it; it was removed in #708.

Add FontManager.forget_plugin_fonts(plugin_id) and call it from both
paths alongside forget_manager_fonts (each guarded on its own, so a font
manager stub with only one still works). FontManager takes no locks, so
like forget_manager_fonts it uses atomic pops over snapshots. A reload
(unload + load) registers the manifest fonts again and they resolve.

Raised by CodeRabbit on #709.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* fix(fonts): call the font manager's forget methods without a None-able local

Pylint E1102 (Codacy) read getattr(..., None) as possibly not callable.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Chuck
2026-10-05 08:26:26 -04:00
committed by GitHub
co-authored by Claude Opus 5.5
parent 0577c807eb
commit 3f920f2899
6 changed files with 206 additions and 12 deletions
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CHANGELOG.md
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@@ -162,6 +162,14 @@ Internal; no behaviour change. Stage 3 of `docs/RUN_LOOP_REDESIGN.md`.
### Fixed
- Unloading a plugin now forgets the fonts its manifest registered, not only
the fonts it reported using. Its `plugin_id::family` entries kept resolving
and their cached font objects stayed alive until a restart, and a family a
reinstalled plugin's manifest dropped stayed registered. The new
`FontManager.forget_plugin_fonts(plugin_id)` does the cleanup;
`PluginManager.unload_plugin()` and a failed load call it alongside
`forget_manager_fonts()`, and a reload registers the manifest's fonts again.
- The web preview and `/api/v3/display/current` no longer stay black for a
whole screen that draws its card once and then holds it. The snapshot is
written from `update_display()` at most once per write interval, so a frame