web/src/editor/shared.ts

@@ -3,7 +3,12 @@
 // one place instead of drifting between files.
 
 export const SELECT_COLOR = '#2f7a3e' // selection stroke/handles
-export const HANDLE_PX = 12 // on-screen size of a drag/resize handle
+// On-screen size of a drag/resize handle. Bigger on a coarse pointer (touch) so
+// a fingertip can actually grab a resize corner or the rotate knob — 12px is fine
+// for a mouse but frustrating for a thumb (#104). Read once at load; a device
+// doesn't switch its primary pointer mid-session.
+export const HANDLE_PX =
+  typeof window !== 'undefined' && window.matchMedia?.('(pointer: coarse)').matches ? 22 : 12
 export const MIN_RADIUS_CM = 1 // smallest plop radius
 export const DIMMED_OPACITY = 0.4 // non-focused objects/plops in focus mode
 

web/src/pages/GardenEditorPage.tsx

@@ -283,13 +283,63 @@ export function GardenEditorPage() {
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [])
 
-  // Desktop keyboard nudging: arrows move the selected object/plop 1cm (Shift =
+  // Move the selected object/plop by (dx, dy) cm: apply live geometry instantly,
-  // 10cm); the PATCH is debounced ~400ms on key-idle so a held key doesn't spam.
+  // then commit ONE debounced PATCH so a burst of nudges (a held arrow key, or
-  // Plops nudge in their object's local frame and clamp to its (local) bounds.
+  // repeated taps of the touch pad) doesn't spam the server. Plops clamp to their
-  // Mounted once, reading live values from nudgeCtx so a data refetch can't
+  // object's local bounds. Reads live values from getState/nudgeCtx so it's
-  // re-subscribe and cancel a pending commit; the pending commit is flushed on
+  // correct whichever surface calls it; a commit only fires if its live value is
-  // unmount, and a fire only commits if its live value is still present (a drag
+  // still present (a drag that cleared it already committed its own PATCH).
-  // that cleared it already committed its own PATCH).
+  const commitLater = (fire: () => void) => {
+    nudgeFire.current = fire
+    if (nudgeTimer.current != null) window.clearTimeout(nudgeTimer.current)
+    nudgeTimer.current = window.setTimeout(() => {
+      nudgeTimer.current = null
+      const fn = nudgeFire.current
+      nudgeFire.current = null
+      fn?.()
+    }, 400)
+  }
+
+  const nudgeSelected = (dx: number, dy: number) => {
+    const { canEdit: canNudge, objects: objs, plantings: plops, updateObject: uo, updatePlanting: up } =
+      nudgeCtx.current
+    if (!canNudge) return
+    const s = useEditorStore.getState()
+    if (s.objectDragging) return // don't fight an active pointer drag
+    if (s.selectedId != null) {
+      const base = s.liveObject?.id === s.selectedId ? s.liveObject : objs.find((o) => o.id === s.selectedId)
+      if (!base) return
+      s.setLiveObject({ ...base, xCm: base.xCm + dx, yCm: base.yCm + dy })
+      commitLater(() => {
+        const live = useEditorStore.getState().liveObject
+        if (live?.id !== s.selectedId) return
+        uo.mutate({ id: live.id, version: live.version, xCm: live.xCm, yCm: live.yCm })
+        useEditorStore.getState().setLiveObject(null)
+      })
+    } else if (s.selectedPlantingId != null) {
+      const base =
+        s.livePlanting?.id === s.selectedPlantingId ? s.livePlanting : plops.find((p) => p.id === s.selectedPlantingId)
+      if (!base) return
+      const obj = objs.find((o) => o.id === base.objectId)
+      let nx = base.xCm + dx
+      let ny = base.yCm + dy
+      if (obj) {
+        nx = Math.max(-obj.widthCm / 2, Math.min(obj.widthCm / 2, nx))
+        ny = Math.max(-obj.heightCm / 2, Math.min(obj.heightCm / 2, ny))
+      }
+      s.setLivePlanting({ ...base, xCm: nx, yCm: ny })
+      commitLater(() => {
+        const live = useEditorStore.getState().livePlanting
+        if (live?.id !== s.selectedPlantingId) return
+        up.mutate({ id: live.id, version: live.version, xCm: live.xCm, yCm: live.yCm })
+        useEditorStore.getState().setLivePlanting(null)
+      })
+    }
+  }
+
+  // Keyboard nudging (desktop): arrows move the selection 1cm, Shift = 10cm — the
+  // same nudgeSelected the touch pad uses. Mounted once; a pending commit is
+  // flushed on unmount so a nudge in flight isn't lost.
   useEffect(() => {
     const DIRS: Record<string, [number, number]> = {
       ArrowUp: [0, -1],
@@ -297,58 +347,16 @@ export function GardenEditorPage() {
       ArrowLeft: [-1, 0],
       ArrowRight: [1, 0],
     }
-    const commitLater = (fire: () => void) => {
-      nudgeFire.current = fire
-      if (nudgeTimer.current != null) window.clearTimeout(nudgeTimer.current)
-      nudgeTimer.current = window.setTimeout(() => {
-        nudgeTimer.current = null
-        const fn = nudgeFire.current
-        nudgeFire.current = null
-        fn?.()
-      }, 400)
-    }
     function onKey(e: KeyboardEvent) {
-      const { canEdit: canNudge, objects: objs, plantings: plops, updateObject: uo, updatePlanting: up } =
-        nudgeCtx.current
-      if (!canNudge) return
       const dir = DIRS[e.key]
       if (!dir) return
       const el = document.activeElement
       if (el && (el.tagName === 'INPUT' || el.tagName === 'TEXTAREA' || el.tagName === 'SELECT')) return
       const s = useEditorStore.getState()
-      if (s.objectDragging) return // don't fight an active pointer drag
+      if (s.selectedId == null && s.selectedPlantingId == null) return
+      e.preventDefault()
       const step = e.shiftKey ? 10 : 1
-      if (s.selectedId != null) {
+      nudgeSelected(dir[0] * step, dir[1] * step)
-        const base = s.liveObject?.id === s.selectedId ? s.liveObject : objs.find((o) => o.id === s.selectedId)
-        if (!base) return
-        e.preventDefault()
-        s.setLiveObject({ ...base, xCm: base.xCm + dir[0] * step, yCm: base.yCm + dir[1] * step })
-        commitLater(() => {
-          const live = useEditorStore.getState().liveObject
-          if (live?.id !== s.selectedId) return // a drag cleared it and committed
-          uo.mutate({ id: live.id, version: live.version, xCm: live.xCm, yCm: live.yCm })
-          useEditorStore.getState().setLiveObject(null)
-        })
-      } else if (s.selectedPlantingId != null) {
-        const base =
-          s.livePlanting?.id === s.selectedPlantingId ? s.livePlanting : plops.find((p) => p.id === s.selectedPlantingId)
-        if (!base) return
-        e.preventDefault()
-        const obj = objs.find((o) => o.id === base.objectId)
-        let nx = base.xCm + dir[0] * step
-        let ny = base.yCm + dir[1] * step
-        if (obj) {
-          nx = Math.max(-obj.widthCm / 2, Math.min(obj.widthCm / 2, nx))
-          ny = Math.max(-obj.heightCm / 2, Math.min(obj.heightCm / 2, ny))
-        }
-        s.setLivePlanting({ ...base, xCm: nx, yCm: ny })
-        commitLater(() => {
-          const live = useEditorStore.getState().livePlanting
-          if (live?.id !== s.selectedPlantingId) return
-          up.mutate({ id: live.id, version: live.version, xCm: live.xCm, yCm: live.yCm })
-          useEditorStore.getState().setLivePlanting(null)
-        })
-      }
     }
     window.addEventListener('keydown', onKey)
     return () => {
@@ -627,6 +635,12 @@ export function GardenEditorPage() {
         )}
         <div className="relative min-h-0 flex-1">
           <GardenCanvas garden={garden} objects={objects} plantings={plantings} plantsById={plantsById} canEdit={canEdit} />
+          {/* Touch fine-positioning: the keyboard's arrow-nudge has no equivalent
+              on a phone, and dragging can't hit single-cm precision. Shown while
+              something's selected on a touch layout (#104). */}
+          {canEdit && (selectedId != null || selectedPlantingId != null) && (
+            <NudgePad onNudge={nudgeSelected} />
+          )}
         </div>
 
         {/* Empty-state hints (non-interactive overlays). */}
@@ -822,6 +836,41 @@ function FillControl({ onFill, busy }: { onFill: (layout: FillLayout) => void; b
   )
 }
 
+// On-screen nudge pad (#104): 1cm arrows for the selected object/plop on touch,
+// where the keyboard's arrow-nudge isn't reachable and a drag can't hit single-cm
+// precision. md:hidden — desktop uses the keyboard. Wired to the same
+// nudgeSelected, so it shares the live-then-debounced-PATCH behaviour.
+function NudgePad({ onNudge }: { onNudge: (dx: number, dy: number) => void }) {
+  const btn =
+    'flex size-10 items-center justify-center rounded-md border border-border bg-surface/90 text-fg ' +
+    'shadow-sm outline-none backdrop-blur transition-colors active:bg-border/70 focus-visible:ring-2 focus-visible:ring-accent/40'
+  return (
+    <div
+      role="group"
+      aria-label="Nudge selection by 1cm"
+      className="absolute bottom-2 left-2 z-20 grid grid-cols-3 grid-rows-3 gap-0.5 md:hidden"
+    >
+      <span />
+      <button type="button" className={btn} aria-label="Nudge up" onClick={() => onNudge(0, -1)}>
+        ↑
+      </button>
+      <span />
+      <button type="button" className={btn} aria-label="Nudge left" onClick={() => onNudge(-1, 0)}>
+        ←
+      </button>
+      <span className="flex size-10 items-center justify-center text-[0.6rem] font-medium text-muted">1cm</span>
+      <button type="button" className={btn} aria-label="Nudge right" onClick={() => onNudge(1, 0)}>
+        →
+      </button>
+      <span />
+      <button type="button" className={btn} aria-label="Nudge down" onClick={() => onNudge(0, 1)}>
+        ↓
+      </button>
+      <span />
+    </div>
+  )
+}
+
 // The mobile primary mode switch (#99): one always-there tab bar so "placing
 // beds", "planting", "journaling" and "assistant" stop competing for the same
 // strip. Assistant is dropped when the instance has no model configured.