refactor: switch leaflet-map to defineProps with factory helpers

Extend num() factory to accept optional extra fields (mapGet, mapSet,
viewState, event). Add off() factory and BoolOffPropInput type. Update
defineProps to derive disable- prefix for bool-off attrs. Remove
~40 lines of local type definitions from leaflet-map.ts.

src/components/leaflet-map.ts

@@ -1,170 +1,81 @@
 import { Icon, Map as LMap, MapOptions } from 'leaflet';
 import { LeafletRegisterEvent } from '../core/register.ts';
+import { defineProps, num, off, on, type NumProp, type PropDef } from '../core/props.ts';
 
 const DEFAULT_CSS_URL = 'https://unpkg.com/leaflet@1.9.4/dist/leaflet.css';
 const DEFAULT_CSS_INTEGRITY = 'sha256-p4NxAoJBhIIN+hmNHrzRCf9tD/miZyoHS5obTRR9BMY=';
 
 const CSS_ATTRS = ['css-url', 'css-integrity', 'css-crossorigin'] as const;
 
-// ── Prop types ─────────────────────────────────────────────────────────────
-
-type NumProp = {
-  kind: 'num';
-  attr: string;
-  default: number;
-  viewState?: true;
-  mapGet?: (m: LMap) => number | undefined;
-  mapSet?: (m: LMap, v: number) => void;
-  event?: string;
-};
-
-type BoolOffProp = {
-  kind: 'bool-off';
-  attr: string;
-  mapSet?: (m: LMap, enabled: boolean) => void;
-};
-
-type BoolOnProp = {
-  kind: 'bool-on';
-  attr: string;
-};
-
-type PropDef = NumProp | BoolOffProp | BoolOnProp;
-
 // ── Property table ─────────────────────────────────────────────────────────
 
-const PROPS = {
+const PROPS = defineProps({
   // View state — excluded from #buildOptions, initialised via setView()
-  lat: {
-    kind: 'num',
-    attr: 'lat',
-    default: 0,
+  lat: num(0, {
     viewState: true,
     event: 'moveend',
     mapGet: (m: LMap) => m.getCenter()?.lat,
     mapSet: (m: LMap, v: number) => m.setView([v, m.getCenter()?.lng ?? 0], m.getZoom()),
-  },
-  lng: {
-    kind: 'num',
-    attr: 'lng',
-    default: 0,
+  }),
+  lng: num(0, {
     viewState: true,
     event: 'moveend',
     mapGet: (m: LMap) => m.getCenter()?.lng,
     mapSet: (m: LMap, v: number) => m.setView([m.getCenter()?.lat ?? 0, v], m.getZoom()),
-  },
-  zoom: {
-    kind: 'num',
-    attr: 'zoom',
-    default: 2,
+  }),
+  zoom: num(2, {
     viewState: true,
     event: 'zoomend',
     mapGet: (m: LMap) => m.getZoom(),
     mapSet: (m: LMap, v: number) => m.setZoom(v),
-  },
+  }),
 
   // Live numeric options — have Leaflet setters
-  minZoom: {
-    kind: 'num',
-    attr: 'min-zoom',
-    default: 0,
+  minZoom: num(0, {
     mapGet: (m: LMap) => m.getMinZoom(),
     mapSet: (m: LMap, v: number) => m.setMinZoom(v),
-  },
-  maxZoom: {
-    kind: 'num',
-    attr: 'max-zoom',
-    default: Infinity,
+  }),
+  maxZoom: num(Infinity, {
     mapGet: (m: LMap) => m.getMaxZoom(),
     mapSet: (m: LMap, v: number) => m.setMaxZoom(v),
-  },
+  }),
 
   // Constructor-only numeric options
-  zoomSnap: { kind: 'num', attr: 'zoom-snap', default: 1 },
-  zoomDelta: { kind: 'num', attr: 'zoom-delta', default: 1 },
-  keyboardPanDelta: { kind: 'num', attr: 'keyboard-pan-delta', default: 80 },
-  wheelDebounceTime: { kind: 'num', attr: 'wheel-debounce-time', default: 40 },
-  wheelPxPerZoomLevel: {
-    kind: 'num',
-    attr: 'wheel-px-per-zoom-level',
-    default: 60,
-  },
-  inertiaDeceleration: {
-    kind: 'num',
-    attr: 'inertia-deceleration',
-    default: 3000,
-  },
-  inertiaMaxSpeed: {
-    kind: 'num',
-    attr: 'inertia-max-speed',
-    default: Infinity,
-  },
-  easeLinearity: { kind: 'num', attr: 'ease-linearity', default: 0.2 },
-  maxBoundsViscosity: { kind: 'num', attr: 'max-bounds-viscosity', default: 0 },
-  tapTolerance: { kind: 'num', attr: 'tap-tolerance', default: 15 },
-  zoomAnimationThreshold: {
-    kind: 'num',
-    attr: 'zoom-animation-threshold',
-    default: 4,
-  },
-  transform3DLimit: {
-    kind: 'num',
-    attr: 'transform-3d-limit',
-    default: 8388608,
-  },
+  zoomSnap: num(1),
+  zoomDelta: num(1),
+  keyboardPanDelta: num(80),
+  wheelDebounceTime: num(40),
+  wheelPxPerZoomLevel: num(60),
+  inertiaDeceleration: num(3000),
+  inertiaMaxSpeed: num(Infinity),
+  easeLinearity: num(0.2),
+  maxBoundsViscosity: num(0),
+  tapTolerance: num(15),
+  zoomAnimationThreshold: num(4),
+  transform3DLimit: num(8388608),
 
   // Boolean defaults-true → disable-* attribute; handler-based options have live mapSet
-  scrollWheelZoom: {
-    kind: 'bool-off',
-    attr: 'disable-scroll-wheel-zoom',
-    mapSet: (m: LMap, v: boolean) => (v ? m.scrollWheelZoom.enable() : m.scrollWheelZoom.disable()),
-  },
-  dragging: {
-    kind: 'bool-off',
-    attr: 'disable-dragging',
-    mapSet: (m: LMap, v: boolean) => (v ? m.dragging.enable() : m.dragging.disable()),
-  },
-  touchZoom: {
-    kind: 'bool-off',
-    attr: 'disable-touch-zoom',
-    mapSet: (m: LMap, v: boolean) => (v ? m.touchZoom.enable() : m.touchZoom.disable()),
-  },
-  doubleClickZoom: {
-    kind: 'bool-off',
-    attr: 'disable-double-click-zoom',
-    mapSet: (m: LMap, v: boolean) => (v ? m.doubleClickZoom.enable() : m.doubleClickZoom.disable()),
-  },
-  boxZoom: {
-    kind: 'bool-off',
-    attr: 'disable-box-zoom',
-    mapSet: (m: LMap, v: boolean) => (v ? m.boxZoom.enable() : m.boxZoom.disable()),
-  },
-  keyboard: {
-    kind: 'bool-off',
-    attr: 'disable-keyboard',
-    mapSet: (m: LMap, v: boolean) => (v ? m.keyboard.enable() : m.keyboard.disable()),
-  },
-  closePopupOnClick: { kind: 'bool-off', attr: 'disable-close-popup-on-click' },
-  trackResize: { kind: 'bool-off', attr: 'disable-track-resize' },
-  zoomControl: { kind: 'bool-off', attr: 'disable-zoom-control' },
-  attributionControl: { kind: 'bool-off', attr: 'disable-attribution-control' },
-  inertia: { kind: 'bool-off', attr: 'disable-inertia' },
-  zoomAnimation: { kind: 'bool-off', attr: 'disable-zoom-animation' },
-  fadeAnimation: { kind: 'bool-off', attr: 'disable-fade-animation' },
-  markerZoomAnimation: {
-    kind: 'bool-off',
-    attr: 'disable-marker-zoom-animation',
-  },
-  bounceAtZoomLimits: {
-    kind: 'bool-off',
-    attr: 'disable-bounce-at-zoom-limits',
-  },
-  tapHold: { kind: 'bool-off', attr: 'disable-tap-hold' },
+  scrollWheelZoom: off((m: LMap, v: boolean) => (v ? m.scrollWheelZoom.enable() : m.scrollWheelZoom.disable())),
+  dragging: off((m: LMap, v: boolean) => (v ? m.dragging.enable() : m.dragging.disable())),
+  touchZoom: off((m: LMap, v: boolean) => (v ? m.touchZoom.enable() : m.touchZoom.disable())),
+  doubleClickZoom: off((m: LMap, v: boolean) => (v ? m.doubleClickZoom.enable() : m.doubleClickZoom.disable())),
+  boxZoom: off((m: LMap, v: boolean) => (v ? m.boxZoom.enable() : m.boxZoom.disable())),
+  keyboard: off((m: LMap, v: boolean) => (v ? m.keyboard.enable() : m.keyboard.disable())),
+  closePopupOnClick: off(),
+  trackResize: off(),
+  zoomControl: off(),
+  attributionControl: off(),
+  inertia: off(),
+  zoomAnimation: off(),
+  fadeAnimation: off(),
+  markerZoomAnimation: off(),
+  bounceAtZoomLimits: off(),
+  tapHold: off(),
 
   // Boolean defaults-false → normal attribute
-  preferCanvas: { kind: 'bool-on', attr: 'prefer-canvas' },
-  worldCopyJump: { kind: 'bool-on', attr: 'world-copy-jump' },
-} satisfies Record<string, PropDef>;
+  preferCanvas: on(),
+  worldCopyJump: on(),
+});
 
 type PropName = keyof typeof PROPS;
 
@@ -172,17 +83,12 @@ const ATTR_TO_PROP = new globalThis.Map<string, PropName>(
   (Object.entries(PROPS) as [PropName, PropDef][]).map(([name, spec]) => [spec.attr, name]),
 );
 
-// ── Element ────────────────────────────────────────────────────────────────
-
 // Derive property types directly from the PROPS table so adding a prop to the
 // table automatically makes it part of the LeafletMap instance type.
 type PropTypes = {
   [K in keyof typeof PROPS]: (typeof PROPS)[K] extends { kind: 'num' } ? number : boolean;
 };
 
-// Cast HTMLElement to a typed base whose instances include PropTypes. This is
-// the mixin pattern — TypeScript sees LeafletMap as having all prop types, the
-// runtime still extends HTMLElement, and no interface merge is required.
 const TypedBase = HTMLElement as unknown as new () => HTMLElement & PropTypes;
 
 export default class LeafletMap extends TypedBase {

src/core/props.ts

@@ -2,6 +2,10 @@ export type NumProp = {
   kind: 'num';
   attr: string;
   default: number;
+  mapGet?: (m: any) => number | undefined;
+  mapSet?: (m: any, v: number) => void;
+  viewState?: boolean;
+  event?: string;
 };
 
 export type StrProp = {
@@ -18,6 +22,7 @@ export type BoolOnProp = {
 export type BoolOffProp = {
   kind: 'bool-off';
   attr: string;
+  mapSet?: (m: any, enabled: boolean) => void;
 };
 
 export type PropDef = NumProp | StrProp | BoolOnProp | BoolOffProp;
@@ -39,20 +44,26 @@ type OptionalAttr<T> = Omit<T, 'attr'> & { attr?: string };
 type NumPropInput = OptionalAttr<NumProp>;
 type StrPropInput = OptionalAttr<StrProp>;
 type BoolOnPropInput = OptionalAttr<BoolOnProp>;
+type BoolOffPropInput = OptionalAttr<BoolOffProp>;
 
-type PropDefInput = NumPropInput | StrPropInput | BoolOnPropInput;
+type PropDefInput = NumPropInput | StrPropInput | BoolOnPropInput | BoolOffPropInput;
 
 type PropDefFromInput<T> =
   T extends { kind: 'num' } ? NumProp
   : T extends { kind: 'str' } ? StrProp
+  : T extends { kind: 'bool-off' } ? BoolOffProp
   : BoolOnProp;
 
 function camelToKebab(s: string): string {
   return s.replace(/[A-Z]/g, c => '-' + c.toLowerCase());
 }
 
-export function num(def: number = 0, attr?: string): NumPropInput {
-  return { kind: 'num', default: def, ...(attr ? { attr } : {}) };
+export function num(
+  def: number = 0,
+  opts?: string | (Omit<NumProp, 'kind' | 'default' | 'attr'> & { attr?: string }),
+): NumPropInput {
+  if (typeof opts === 'string') opts = { attr: opts };
+  return { kind: 'num', default: def, ...opts };
 }
 
 export function str(def: string = '', attr?: string): StrPropInput {
@@ -63,6 +74,10 @@ export function on(attr?: string): BoolOnPropInput {
   return { kind: 'bool-on', ...(attr ? { attr } : {}) };
 }
 
+export function off(mapSet?: (m: any, enabled: boolean) => void): BoolOffPropInput {
+  return { kind: 'bool-off', ...(mapSet ? { mapSet } : {}) };
+}
+
 export function defineProps<T extends Record<string, PropDefInput>>(
   input: T,
 ): { [K in keyof T]: PropDefFromInput<T[K]> } {
@@ -70,7 +85,8 @@ export function defineProps<T extends Record<string, PropDefInput>>(
   for (const key of Object.keys(input)) {
     const val = input[key] as PropDefInput;
     const { attr: override, ...rest } = val as any;
-    output[key] = { ...rest, attr: override ?? camelToKebab(key) } as PropDef;
+    const attr = override ?? (rest.kind === 'bool-off' ? 'disable-' + camelToKebab(key) : camelToKebab(key));
+    output[key] = { ...rest, attr } as PropDef;
   }
   return output as any;
 }