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[feat](trx-frontend-http): draw APRS symbols from the sprite sheets
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Browse Source 
Resolve a table/code pair to a sprite cell in aprs-shared, and use it
from both the packet lists and the map markers, which had each been
printing the raw symbol character in a bordered box.

A table identifier of / or \ selects the primary or alternate sheet
directly.  Anything else is an overlay character, which the APRS spec
draws on top of the alternate symbol -- so those stack the overlay sheet
over the alternate one rather than picking a sheet.  Codes outside
0x21..0x7E have no cell and keep the old character box.

The sheet URLs stay in the stylesheet so a min-resolution query can swap
in the retina sheets; only the cell offset is computed and set inline.
Map markers share the helper through the plugin chunk, so the map stays
free of any remote symbol fetch.

Verified in a browser against the real stylesheet and sheets: /> is a
car, /_ a WX circle, /& an igate diamond, \n a red triangle, and the
overlays S> and 7# carry their character on the alternate symbol.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018huL1ELyr86yVqfAabtioA
Signed-off-by: Stan Grams <sjg@haxx.space>
This commit was merged in pull request #37.
This commit is contained in:
sjg
2026-08-03 19:55:50 +02:00
co-authored by Claude Opus 5
parent 02fe492dbf
commit 5b7dd493d4
9 changed files with 235 additions and 8 deletions
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src/trx-client/trx-frontend/trx-frontend-http/assets/web/style.css
+15 -1
View File
@@ -2533,7 +2533,21 @@ body.map-fake-fullscreen-active {
font-size: 0.75rem;
word-break: break-all;
}
.aprs-symbol { display: inline-block; width: 24px; height: 24px; background-size: 384px 192px; vertical-align: middle; margin-right: 0.3rem; }
/* APRS symbols are drawn from the vendored hessu/aprs-symbols sprite sheets:
16x6 grids of 24px cells, indexed by `symbol code - 0x21`. The cell offset
is set inline by the APRS/map bundles; the sheet URL stays here so retina
displays can swap in the @2x variants. */
.aprs-symbol { display: inline-block; width: 24px; height: 24px; background-repeat: no-repeat; background-size: 384px 144px; vertical-align: middle; margin-right: 0.3rem; }
.aprs-symbol-marker { margin-right: 0; }
.aprs-symbol-primary { background-image: url('/vendor/aprs-symbols-24-0.png'); }
.aprs-symbol-alternate { background-image: url('/vendor/aprs-symbols-24-1.png'); }
.aprs-symbol-overlaid { background-image: url('/vendor/aprs-symbols-24-2.png'), url('/vendor/aprs-symbols-24-1.png'); }
@media (min-resolution: 2dppx) {
.aprs-symbol-primary { background-image: url('/vendor/aprs-symbols-24-0-2x.png'); }
.aprs-symbol-alternate { background-image: url('/vendor/aprs-symbols-24-1-2x.png'); }
.aprs-symbol-overlaid { background-image: url('/vendor/aprs-symbols-24-2-2x.png'), url('/vendor/aprs-symbols-24-1-2x.png'); }
}
/* Fallback for symbol codes outside the sprite sheets: show the raw character. */
.aprs-symbol-local { border: 1px solid var(--border); border-radius: 4px; background: var(--surface-raised); color: var(--text); font: 700 0.8rem/22px ui-monospace, monospace; text-align: center; }
.aprs-pos { color: var(--accent-green); text-decoration: none; margin-left: 0.3rem; font-size: 0.8rem; }
.aprs-pos:hover { text-decoration: underline; }