task(CAD-14): phase 3 - V2 select tool on v2 doc (click via bridge hitTest, shift-additive, box-select by center-in-bbox, onChange app channel via ref), bridge onChange wired

frontend/src/components/CanvasArea.tsx

@@ -46,6 +46,9 @@ const CanvasArea: React.FC<CanvasAreaProps> = ({
   /** CAD-14: Frische Prop-Referenz gegen Stale-Closure (Dispatcher/onChanged sind einmalig registriert). */
   const onElementCreatedRef = useRef(onElementCreated);
   onElementCreatedRef.current = onElementCreated;
+  /** CAD-14: Frische Prop-Referenz für Selection-Änderungen aus V2-Werkzeugen. */
+  const onSelectionChangeRef = useRef(onSelectionChange);
+  onSelectionChangeRef.current = onSelectionChange;
   const spatialIndexRef = useRef<SpatialIndex | null>(null);
   const layerManagerRef = useRef<LayerManager | null>(null);
   const selectionEngineRef = useRef<SelectionEngine | null>(null);
@@ -170,6 +173,9 @@ const CanvasArea: React.FC<CanvasAreaProps> = ({
           getIds: () => Array.from(selectionEngine.getSelectedIds()),
           setIds: (ids) => selectionEngine.selectByIds(ids, false),
           hitTest: (wx, wy, tol) => renderEngine.hitTest(wx, wy, tol),
+          // CAD-14: App-Kanal fuer V2-Werkzeuge (selectTool) — via Ref gegen
+          // Stale-Closure, derselbe Kanal wie die Legacy-Engine nutzt.
+          onChange: (ids) => onSelectionChangeRef.current?.(ids),
         }),
       });
 

frontend/src/plugins/builtin/core-drawing/index.ts

@@ -1022,15 +1022,99 @@ export const mlineTool: ToolExtensionV2 = {
   },
 };
 
+let boxStart: Pt | null = null;
+
+export const selectTool: ToolExtensionV2 = {
+  manifest: {
+    id: 'select',
+    label: 'Auswahl',
+    icon: '\u2196',
+    ribbonTab: 'canvas',
+    tags: ['basic'],
+    description: 'Auswahl: Klick wählt, Drag = Box-Select, Shift additiv (CAD-14: direkt auf V2-Dokument)',
+  },
+  optionsSchema: [],
+  handlers: {
+    down(e, ctx) {
+      const c = ctx as FullToolContext;
+      const sel = c.selection;
+      const hit = sel?.hitTest(e.world.x, e.world.y, 5) ?? null;
+      if (hit) {
+        if (e.shift) {
+          // additiv: bestehende IDs + neue ID
+          const current = sel?.getIds() ?? [];
+          const next = current.includes(hit.id) ? current.filter((id) => id !== hit.id) : [...current, hit.id];
+          sel?.setIds(next);
+        } else {
+          sel?.setIds([hit.id]);
+        }
+        sel?.onChange?.(sel?.getIds());
+        c.setStatus(`Ausgewählt: ${hit.id}`);
+        boxStart = null;
+      } else {
+        if (!e.shift) sel?.setIds([]);
+        sel?.onChange?.(sel?.getIds() ?? []);
+        boxStart = e.world;
+        c.setStatus('Box-Select: aufziehen');
+      }
+    },
+    move(e, ctx) {
+      if (!boxStart) return;
+      const c = ctx as FullToolContext;
+      // Live-Vorschau der Box als gestricheltes Rechteck
+      ctx.setPreview?.({
+        id: '__boxselect__', type: 'rect', layerId: '',
+        x: (boxStart.x + e.world.x) / 2,
+        y: (boxStart.y + e.world.y) / 2,
+        width: Math.abs(e.world.x - boxStart.x),
+        height: Math.abs(e.world.y - boxStart.y),
+        properties: { stroke: '#00aaff', strokeWidth: 1, visible: true },
+      } as unknown as CADElement);
+    },
+    up(e, ctx) {
+      const c = ctx as FullToolContext;
+      if (!boxStart) return;
+      const start = boxStart;
+      boxStart = null;
+      ctx.setPreview?.(null);
+      // War es ein Drag (Box) oder nur ein Klick?
+      const dx = Math.abs(e.world.x - start.x);
+      const dy = Math.abs(e.world.y - start.y);
+      if (dx < 3 && dy < 3) return; // Klick bereits in down behandelt
+      const minX = Math.min(start.x, e.world.x);
+      const maxX = Math.max(start.x, e.world.x);
+      const minY = Math.min(start.y, e.world.y);
+      const maxY = Math.max(start.y, e.world.y);
+      const all = c.doc?.getAllElements() ?? [];
+      const hits = all.filter((el) => el.x >= minX && el.x <= maxX && el.y >= minY && el.y <= maxY).map((el) => el.id);
+      const sel = c.selection;
+      if (e.shift) {
+        const current = sel?.getIds() ?? [];
+        const merged = Array.from(new Set([...current, ...hits]));
+        sel?.setIds(merged);
+      } else {
+        sel?.setIds(hits);
+      }
+      sel?.onChange?.(sel?.getIds() ?? []);
+      c.setStatus(`Box-Select: ${hits.length} Element(e)`);
+    },
+    cancel(ctx) {
+      boxStart = null;
+      ctx.setPreview?.(null);
+      ctx.setStatus('Auswahl abgebrochen');
+    },
+  },
+};
+
 export const coreDrawingPlugin: PluginV2 = {
   manifest: {
     id: 'core-drawing',
     name: 'Zeichnen (Kern)',
-    version: '1.5.0',
+    version: '1.6.0',
     author: 'web-cad team',
-    description: 'Zeichenwerkzeuge V2: Linie, Rechteck, Kreis, Bogen, Polylinie, Polygon, RevCloud.',
+    description: 'Zeichenwerkzeuge V2: Linie, Rechteck, Kreis, Bogen, Polylinie, Polygon, RevCloud, Auswahl.',
     category: 'tools',
     enabledByDefault: true,
   },
-  tools: [lineTool, rectTool, circleTool, arcTool, polylineTool, polygonTool, revcloudTool, ellipseTool, splineTool, pointTool, xlineTool, rayTool, mlineTool],
+  tools: [selectTool, lineTool, rectTool, circleTool, arcTool, polylineTool, polygonTool, revcloudTool, ellipseTool, splineTool, pointTool, xlineTool, rayTool, mlineTool],
 };

frontend/src/plugins/types.ts

@@ -157,10 +157,12 @@ export interface ToolContext {
 export interface ToolSelectionBridge {
   /** Aktuell selektierte Element-IDs. */
   getIds(): string[];
-  /** Setzt die Selektion vollständig. */
-  setIds(ids: string[]): void;
+  /** Setzt die Selektion vollständig (additive = zur bestehenden hinzufügen). */
+  setIds(ids: string[], additive?: boolean): void;
   /** Element-Treffer an Weltposition (oder null). */
   hitTest(worldX: number, worldY: number, tolerancePx: number): CADElement | null;
+  /** CAD-14: Wird bei jeder Selektionsänderung durch V2-Werkzeuge aufgerufen. */
+  onChange?(ids: string[]): void;
 }
 
 /** Erweiterter Kontext für Tools mit Dokument-/Selektionszugriff (A3). */

frontend/tests/selectToolV2.test.ts

@@ -0,0 +1,100 @@
+/**
+ * CAD-14 Phase 3: selectTool V2 — Auswahl direkt auf dem V2-Dokument.
+ * Klick = hitTest via SelectionBridge, Leerklick leert, Shift additiv,
+ * Drag = Box-Select (Elemente mit Zentrum in BBox).
+ */
+import { describe, it, expect, beforeEach } from 'vitest';
+import { selectTool } from '../src/plugins/builtin/core-drawing';
+import { CADDocument } from '../src/kernel/document/CADDocument';
+import { YjsDocument } from '../src/crdt/YjsDocument';
+import type { CADElement, Pt } from '../src/types/cad.types';
+
+function pe(x: number, y: number, shift = false): { world: Pt; shift: boolean } {
+  return { world: { x, y }, shift } as never;
+}
+
+function makeCtx(ids: string[], hit: CADElement | null) {
+  const selected: string[][] = [];
+  const onChangeCalls: string[][] = [];
+  const realDoc = new CADDocument(new YjsDocument());
+  let currentIds = [...ids];
+  const ctx: any = {
+    options: {},
+    selection: {
+      getIds: () => currentIds,
+      setIds: (next: string[], additive?: boolean) => {
+        currentIds = additive ? [...currentIds, ...next] : next;
+        selected.push(currentIds);
+      },
+      hitTest: (_x: number, _y: number, _tol: number) => hit,
+      onChange: (ids2: string[]) => onChangeCalls.push(ids2),
+    },
+    doc: realDoc,
+    setStatus: () => {},
+    setPreview: () => {},
+  };
+  return { ctx, selected, onChangeCalls, realDoc, getCurrentIds: () => currentIds };
+}
+
+function lineEl(id: string, x1: number, y1: number, x2: number, y2: number): CADElement {
+  return {
+    id, type: 'line', layerId: 'l', x: (x1 + x2) / 2, y: (y1 + y2) / 2,
+    width: Math.abs(x2 - x1), height: Math.abs(y2 - y1),
+    properties: { x1, y1, x2, y2 },
+  } as unknown as CADElement;
+}
+
+describe('CAD-14 Phase 3: selectTool V2', () => {
+  beforeEach(() => {
+    selectTool.handlers.cancel?.({ setStatus: () => {}, setPreview: () => {} } as never);
+  });
+
+  it('Manifest: id=select, basic-tag (immer sichtbar)', () => {
+    expect(selectTool.manifest.id).toBe('select');
+    expect((selectTool.manifest.tags ?? []).includes('basic')).toBe(true);
+  });
+
+  it('Klick auf Element: hitTest-Treffer wird selektiert (setIds mit ID)', () => {
+    const el = lineEl('e1', 0, 0, 100, 100);
+    const { ctx, selected } = makeCtx([], el);
+    selectTool.handlers.down!(pe(50, 50), ctx);
+    expect(selected.length).toBe(1);
+    expect(selected[0]).toEqual(['e1']);
+  });
+
+  it('Leerklick (hitTest null): Auswahl geleert (setIds mit [])', () => {
+    const { ctx, selected } = makeCtx(['e9'], null);
+    selectTool.handlers.down!(pe(500, 500), ctx);
+    expect(selected.length).toBe(1);
+    expect(selected[0]).toEqual([]);
+  });
+
+  it('Shift-Klick additiv: setIds mit additive=true', () => {
+    const el = lineEl('e1', 0, 0, 100, 100);
+    const { ctx, selected } = makeCtx(['e9'], el);
+    selectTool.handlers.down!(pe(50, 50, true), ctx);
+    expect(selected.length).toBe(1);
+    // additive-Variante: bestaehige IDs + neue ID
+    expect(selected[0]).toEqual(['e9', 'e1']);
+  });
+
+  it('Box-Select: Element mit Zentrum in BBox wird selektiert', () => {
+    const { ctx, realDoc, getCurrentIds } = makeCtx([], null);
+    const el = lineEl('e1', 0, 0, 100, 100);
+    realDoc.addElement(el);
+    // down in leerer Gegend startet Box (Leerklick leert zuerst — korrekt),
+    // move zeigt Vorschau, up schliesst BBox um Element.
+    selectTool.handlers.down!(pe(-10, -10), ctx);
+    selectTool.handlers.move!(pe(200, 200), ctx);
+    selectTool.handlers.up!(pe(200, 200), ctx);
+    expect(getCurrentIds()).toEqual(['e1']);
+  });
+
+  it('onChange feuert nach Klick-Auswahl (App-Kanal)', () => {
+    const el = lineEl('e1', 0, 0, 100, 100);
+    const { ctx, onChangeCalls } = makeCtx([], el);
+    selectTool.handlers.down!(pe(50, 50), ctx);
+    expect(onChangeCalls.length).toBe(1);
+    expect(onChangeCalls[0]).toEqual(['e1']);
+  });
+});