Let a weather source describe its own products

A weather source can describe its own products (credit, units, coverage,
legend) through an optional `display` object in each product manifest:
source, credit, units, coverage, info, legend and extent. The weather
layer uses each valid field in the row summary, legend, info text,
coverage navigation, outside-coverage status, layer stats and imagery
credit, and keeps today's built-in value for any field that is absent or
invalid. Units and legend describe one scale, so they apply only as a
valid pair; otherwise both keep their built-in values, and the radar
info heading names the units in use.

Text is single-line and length-capped. It rejects control characters
(U+0000-U+001F, U+007F-U+009F), line and paragraph separators, and
invisible or format characters: soft hyphen (U+00AD), combining grapheme
joiner (U+034F), Arabic letter mark (U+061C), Mongolian vowel separator
(U+180E), zero-width and direction marks (U+200B-U+200F), bidi embedding
and override (U+202A-U+202E), word joiner, invisible operators and bidi
isolates (U+2060-U+2069), variation selectors (U+FE00-U+FE0F), the
byte-order mark (U+FEFF) and tag characters (U+E0000-U+E007F).

Legends need 2-16 stops whose labels are plain decimal numbers or short
text and whose colours are #rrggbb. A number label must read back
exactly as the legend shows it: within the safe integer range, with no
leading zeros and no digits lost to rounding. Extents must be finite, in
range and non-empty. Supplied source and units text is data: the layer
marks it so the panels show it untranslated, while built-in values are
translated as before.

The imagery credit is escaped as plain text and follows a refreshed
manifest even when the shown frame stays the same. A refresh changes
only the credit: the shown frame keeps the snapshot it was staged from,
so a later host switch restages it with its own time and bounds and the
refreshed credit. Manifests without `display`, including the bundled
nowCOAST ones, render exactly as before.

src/ui/layerPanel.js

@@ -635,7 +635,11 @@ export class LayerPanel {
     const stats = layer.stats || {};
     const feedState = layerFeedState(stats);
     const stateLabel = t(FEED_STATE_LABEL_KEYS[feedState]);
-    const source = sourceLabel(stats.source || layer.source);
+    // A layer marks source text that is data rather than a catalog name.
+    const source =
+      stats.sourceVerbatim === true && stats.source
+        ? stats.source
+        : sourceLabel(stats.source || layer.source);
     const lifecycleState =
       layer.lifecycleState || (layer.enabled ? 'enabled' : 'disabled');
     if (lifecycleState === 'enabling' || lifecycleState === 'disabling') {

src/ui/layerStatusLocale.test.mjs

@@ -87,3 +87,21 @@ for (const locale of ['es', 'ru']) {
     }
   });
 }
+
+test('a source a layer marks as data is shown untranslated in the row', () => {
+  setLocale('ru');
+  try {
+    const row = (stats) =>
+      LayerPanel.prototype._buildMetaText({
+        id: 'weather-lightning',
+        enabled: true,
+        stats: { count: 1, lastUpdate: Date.now(), ...stats },
+      });
+    assert.match(row({ source: 'Local ADS-B' }), /Локальный ADS-B/);
+    const verbatim = row({ source: 'Local ADS-B', sourceVerbatim: true });
+    assert.match(verbatim, /Local ADS-B/);
+    assert.doesNotMatch(verbatim, /Локальный/);
+  } finally {
+    setLocale('en');
+  }
+});

src/ui/railCardBlocks.js

@@ -16,9 +16,10 @@ const order = (parent, nodes) =>
       parent.insertBefore(node, parent.children[i] || null);
   });
 
-// "960 — 1050+ гПа": the unit stays with the last number.
-const scaleText = (low, high, units) => {
-  const unit = unitLabel(units);
+// "960 — 1050+ гПа": the unit stays with the last number. Units a source
+// supplied as data are shown as given.
+const scaleText = (low, high, units, verbatim) => {
+  const unit = verbatim ? units || '' : unitLabel(units);
   const range = `${formatScaleLabel(low)} — ${formatScaleLabel(high)}`;
   return unit ? `${range}\u00a0${unit}` : range;
 };
@@ -309,7 +310,12 @@ export function createRailCardBlocks({ container, cardId, onParams }) {
             block.scale,
             'textContent',
             visible
-              ? scaleText(legend.labels[0], legend.labels.at(-1), legend.units)
+              ? scaleText(
+                  legend.labels[0],
+                  legend.labels.at(-1),
+                  legend.units,
+                  legend.unitsVerbatim === true,
+                )
               : '',
           );
         } else if (props.type === 'actions') {

src/ui/weatherPanel.js

@@ -215,6 +215,7 @@ export function createWeatherPanel({
           colors: legend.map(({ color }) => color),
           labels: legend.map(({ label }) => label),
           units: categorical ? '' : summary.units,
+          ...(summary.unitsVerbatim === true ? { unitsVerbatim: true } : {}),
           zeroIndex: legend.findIndex(({ label }) => label === '0'),
         },
       };

src/ui/weatherPanel.test.mjs

@@ -752,3 +752,27 @@ test('air-quality readout renders its band legend, Canada coverage and worst-fir
   view.destroy();
   layer.destroy();
 });
+test('source-supplied legend units are shown as given; catalog units are translated', () => {
+  setLocale('ru');
+  try {
+    const f = fixture();
+    const view = createWeatherPanel(f);
+    const row = (summary) => ({
+      ...radar,
+      summary: { ...radar.summary, units: 'km/h', ...summary },
+      legend: [
+        { label: '1', color: '#000000' },
+        { label: '2', color: '#ffffff' },
+      ],
+    });
+    const scale = () =>
+      f.find((n) => n.className === 'rail-card-scale').textContent;
+    view.update([row()]);
+    assert.equal(scale(), '1 — 2 км/ч');
+    view.update([row({ unitsVerbatim: true })]);
+    assert.equal(scale(), '1 — 2 km/h');
+    view.destroy();
+  } finally {
+    setLocale('en');
+  }
+});