fix blockkennzeichen multiline rendering

Author: hiddewie

features/signals_railway_signals.yaml

@@ -826,9 +826,18 @@ signals_railway_signals:
 
     - description: Blockkennzeichen
       country: DE
-      # TODO match width and height
-      # WHEN ref_width <= 4 AND ref_height <= 2 THEN CONCAT('de/blockkennzeichen-', ref_width, 'x', ref_height)
-      icon: { default: 'de/blockkennzeichen' }
+      icon:
+        match: 'ref_multiline'
+        cases:
+          - { regex: '^([^\n]{4}\n[^\n]{1,4})|([^\n]{1,4}\n[^\n]{4})$', value: 'de/blockkennzeichen-4x2' }
+          - { regex: '^[^\n]{4}$', value: 'de/blockkennzeichen-4x1' }
+          - { regex: '^([^\n]{3}\n[^\n]{1,3})|([^\n]{1,3}\n[^\n]{3})$', value: 'de/blockkennzeichen-3x2' }
+          - { regex: '^[^\n]{3}$', value: 'de/blockkennzeichen-3x1' }
+          - { regex: '^([^\n]{2}\n[^\n]{1,2})|([^\n]{1,2}\n[^\n]{2})$', value: 'de/blockkennzeichen-2x2' }
+          - { regex: '^[^\n]{2}$', value: 'de/blockkennzeichen-2x1' }
+          - { regex: '^[^\n]\n[^\n]$', value: 'de/blockkennzeichen-1x2' }
+          - { regex: '^[^\n]$', value: 'de/blockkennzeichen-1x1' }
+        default: 'de/blockkennzeichen'
       tags:
         - { tag: 'railway:signal:train_protection', value: 'DE-ESO:blockkennzeichen' }
 

import/openrailwaymap.lua

@@ -169,8 +169,6 @@ local signals = osm2pgsql.define_table({
     { column = 'deactivated', type = 'boolean' },
     { column = 'ref', type = 'text' },
     { column = 'ref_multiline', type = 'text' },
-    { column = 'ref_width', type = 'smallint' },
-    { column = 'ref_height', type = 'smallint' },
     { column = 'signal_direction', type = 'text' },
     {% for tag in signals_railway_signals.tags %}
     { column = '{% tag %}', type = 'text' },
@@ -429,11 +427,6 @@ function osm2pgsql.process_node(object)
       tags['railway:signal:speed_limit:deactivated']
     ) == 'yes'
     local ref_multiline, newline_count = (tags.ref or ''):gsub(' ', '\n')
-    local ref_height = newline_count + 1
-    local ref_width = 0
-    for part in string.gmatch(tags.ref or '', '[^ ]+') do
-      ref_width = math.max(ref_width, part:len())
-    end
 
     signals:insert({
       way = object:as_point(),
@@ -442,8 +435,6 @@ function osm2pgsql.process_node(object)
       deactivated = deactivated,
       ref = tags.ref,
       ref_multiline = ref_multiline ~= '' and ref_multiline or nil,
-      ref_height = ref_multiline ~= '' and ref_height or nil,
-      ref_width = ref_multiline ~= '' and ref_width or nil,
       signal_direction = tags['railway:signal:direction'],
       {% for tag in signals_railway_signals.tags %}
       ["{% tag %}"] = tags['{% tag %}'],

proxy/js/styles.mjs

@@ -2383,14 +2383,31 @@ const layers = {
       }
     },
     ...imageLayerWithOutline(
-      'railway_signals',
-      ['get', 'feature'],
+      'railway_signals_medium',
+      ['case',
+        ['==', ['slice', ['get', 'feature'], 0, 20], 'de/blockkennzeichen-'], 'de/blockkennzeichen',
+        ['get', 'feature'],
+      ],
       {
         type: 'symbol',
         minzoom: 13,
+        maxzoom: 16,
+        source: 'openrailwaymap_signals',
+        'source-layer': 'signals_railway_signals',
+        layout: {
+          'symbol-z-order': 'source',
+          'icon-overlap': 'always',
+        },
+      },
+    ),
+    ...imageLayerWithOutline(
+      'railway_signals_high',
+      ['get', 'feature'],
+      {
+        type: 'symbol',
+        minzoom: 16,
         source: 'openrailwaymap_signals',
         'source-layer': 'signals_railway_signals',
-        // TODO fix blockkennzeichen
         layout: {
           'symbol-z-order': 'source',
           'icon-overlap': 'always',
@@ -2483,17 +2500,10 @@ const layers = {
       minzoom: 13,
       source: 'openrailwaymap_signals',
       'source-layer': 'signals_railway_signals',
-      filter: ['step', ['zoom'],
-        ['all',
-          ['!=', ['get', 'ref'], null],
-          ['!=', ['get', 'feature'], ''],
-        ],
-        16,
-        ['all',
-          ['!=', ['get', 'ref'], null],
-          ['!=', ['get', 'feature'], ''],
-          ['!=', ['slice', ['get', 'feature'], 0, 20], 'de/blockkennzeichen-'],
-        ],
+      filter: ['all',
+        ['!=', ['get', 'ref'], null],
+        ['!=', ['get', 'feature'], ''],
+        ['!=', ['slice', ['get', 'feature'], 0, 20], 'de/blockkennzeichen-'],
       ],
       paint: {
         'text-halo-color': ['case',