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I added four customizable faces so themes and customize-face can restyle the text wttrin draws itself: wttrin-mode-line-stale (the dimmed stale mode-line emoji), wttrin-staleness-header (the "Last updated:" line), wttrin-instructions (the footer prose), and wttrin-key (the [a]/[g]/[q] chords).
The package exposed no faces before and hardcoded one color. The stale-emoji dimming used a literal "gray60". Now it inherits a face, so the color tracks the theme. I changed make-emoji-icon's second argument from a color string to a face symbol applied via :inherit.
wttrin-key inherits bold rather than help-key-binding, which is Emacs 28+ while the package supports 24.4.
The weather ASCII art stays colored by xterm-color's ANSI faces. Only the package's own text is newly faced.
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Replace TTL-based cache invalidation with proactive scheduled refresh.
Both mode-line and buffer systems now follow: timer refreshes cache,
display reads from cache, staleness indicated when data is old.
Phase 1 - Mode-line cache formalization + staleness display:
- Replace wttrin--mode-line-tooltip-data with wttrin--mode-line-cache
as (timestamp . data) cons cell matching buffer cache pattern
- Add wttrin--format-age helper for human-readable age strings
- Rewrite wttrin--mode-line-update-display to take no arguments,
read from cache, compute staleness (age > 2x refresh interval),
dim emoji gray when stale, show staleness info in tooltip
- Rewrite wttrin--mode-line-fetch-weather to write cache on success,
show stale display on failure with cache, error placeholder without
- Add wttrin--mode-line-update-placeholder-error for first-launch failure
Phase 2 - Remove TTL, add proactive buffer refresh:
- Rename wttrin-cache-ttl to wttrin-refresh-interval (default 3600s)
with define-obsolete-variable-alias for backward compatibility
- Change wttrin-mode-line-refresh-interval default from 900 to 3600
- Remove TTL check from wttrin--get-cached-or-fetch; serve cached data
regardless of age, background timer keeps it fresh
- Add buffer refresh timer (wttrin--buffer-cache-refresh)
Phase 3 - Buffer staleness display:
- Add wttrin--format-staleness-header for buffer age display
- Insert staleness line in wttrin--display-weather before instructions
Phase 4 - Cleanup:
- Remove all references to wttrin--mode-line-tooltip-data
- Update README.org cache settings and mode-line documentation
- Update tests for new API (198 tests across 21 files, all passing)
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