task(A4.8): migrate delete/offset tools to v2

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

@@ -20,6 +20,7 @@ import {
   mirrorElement,
   angleBetween,
   distance,
+  offsetElement,
 } from '../../../tools/modification/geometry';
 import type { Pt } from '../../../tools/modification/geometry';
 
@@ -273,16 +274,106 @@ export const rotateTool: ToolExtensionV2 = makeTransformTool('rotate');
 export const scaleTool: ToolExtensionV2 = makeTransformTool('scale');
 export const mirrorTool: ToolExtensionV2 = makeTransformTool('mirror');
 
+// ─────────────────────────────────────────────────────────────
+// Delete (Task A4.8) — Portierung aus Legacy handleDeleteDown:
+// Einzelnklick auf Element löscht es sofort (kein up/Bestätigung).
+// Jetzt via doc.deleteElements → undo-fähig.
+// ─────────────────────────────────────────────────────────────
+export const deleteTool: ToolExtensionV2 = {
+  manifest: {
+    id: 'delete', label: 'Löschen', icon: '\u2715', ribbonTab: 'canvas', tags: ['basic'],
+    description: 'Element anklicken zum Löschen',
+  },
+  optionsSchema: [],
+  handlers: {
+    down(e, ctx) {
+      const c = ctx as FullToolContext;
+      if (!c.doc || !c.selection) return;
+      const ids = c.selection.getIds();
+      if (ids.length > 0) {
+        // Selektion vorhanden → alles selektierte löschen
+        c.doc.deleteElements(ids);
+        c.selection.setIds([]);
+        ctx.setStatus(`${ids.length} Element(e) gelöscht`);
+        return;
+      }
+      // Sonst: direkter Klick-Treffer
+      const hit = c.selection.hitTest(e.world.x, e.world.y, 5);
+      if (!hit) return;
+      c.doc.deleteElements([hit.id]);
+      ctx.setStatus(`Gelöscht: ${hit.id}`);
+    },
+  },
+};
+
+// ─────────────────────────────────────────────────────────────
+// Offset (Task A4.8) — nutzt die BUG-3-reparierte offsetElement-
+// Signatur mit Seitenparameter; Legacy-Ablauf:
+// Klick1 = Element wählen, Klick2 = Richtung+Distanz → NEUES Element.
+// ─────────────────────────────────────────────────────────────
+let offsetSource: CADElement | null = null;
+let offsetBase: Pt | null = null;
+
+export const offsetTool: ToolExtensionV2 = {
+  manifest: {
+    id: 'offset', label: 'Versatz', icon: '\u2937', ribbonTab: 'canvas', tags: ['pro'],
+    description: 'Element anklicken, dann seitlichen Versatz klicken',
+  },
+  optionsSchema: [],
+  handlers: {
+    down(e, ctx) {
+      const c = ctx as FullToolContext;
+      if (!c.doc || !c.selection) return;
+      if (!offsetSource) {
+        const hit = c.selection.hitTest(e.world.x, e.world.y, 5);
+        if (!hit) return;
+        offsetSource = hit;
+        offsetBase = e.world;
+        ctx.setStatus(`Offset: Element ${hit.id} gewählt – Versatz klicken`);
+        return;
+      }
+      // Zweiter Klick: Distanz + Seite (Kreuzprodukt für Linien, Radius sonst)
+      const src = c.doc.getElement(offsetSource.id);
+      if (!src) { offsetSource = null; offsetBase = null; return; }
+      const dist = Math.hypot(e.world.x - offsetBase!.x, e.world.y - offsetBase!.y);
+      let side: 1 | -1 = 1;
+      if (src.type === 'line' && src.properties.x1 !== undefined && src.properties.y1 !== undefined) {
+        const p1x = src.properties.x1 as number;
+        const p1y = src.properties.y1 as number;
+        const p2x = src.properties.x2 as number;
+        const p2y = src.properties.y2 as number;
+        side = (p2x - p1x) * (e.world.y - p1y) - (p2y - p1y) * (e.world.x - p1x) >= 0 ? 1 : -1;
+      } else if ((src.type === 'circle' || src.type === 'arc') && src.properties.radius !== undefined) {
+        side = Math.hypot(e.world.x - src.x, e.world.y - src.y) >= (src.properties.radius as number) ? 1 : -1;
+      }
+      const next = offsetElement(src, dist, side);
+      let newEl: CADElement | null = null;
+      c.doc.transact(() => {
+        newEl = { ...next, id: uid('off') };
+        c.doc!.addElement(newEl!);
+      });
+      ctx.setStatus(`Offset erstellt (${(newEl as unknown as CADElement).id})`);
+      offsetSource = null;
+      offsetBase = null;
+    },
+    cancel(ctx) {
+      offsetSource = null;
+      offsetBase = null;
+      ctx.setStatus('Offset abgebrochen');
+    },
+  },
+};
+
 /** V2-Plugin: Kern-Bearbeitungswerkzeuge. */
 export const coreModifyPlugin: PluginV2 = {
   manifest: {
     id: 'core-modify',
     name: 'Bearbeiten (Kern)',
-    version: '1.3.0',
+    version: '1.4.0',
     author: 'web-cad team',
-    description: 'Auswahl, Schraffur, Verschieben, Kopieren, Rotieren, Skalieren, Spiegeln (V2).',
+    description: 'Auswahl, Schraffur, Verschieben, Kopieren, Rotieren, Skalieren, Spiegeln, Löschen, Versatz (V2).',
     category: 'tools',
     enabledByDefault: true,
   },
-  tools: [selectTool, hatchTool, moveTool, copyTool, rotateTool, scaleTool, mirrorTool],
+  tools: [selectTool, hatchTool, moveTool, copyTool, rotateTool, scaleTool, mirrorTool, deleteTool, offsetTool],
 };

frontend/tests/pilotTools.test.ts

@@ -513,6 +513,86 @@ describe('A4.7 pilot: transform tools', () => {
   });
 });
 
+describe('A4.8 pilot: delete tool', () => {
+  it('löscht alle selektierten Elemente in EINER Transaktion; undo stellt her', () => {
+    const { ydoc } = createInMemoryDoc();
+    const doc = new CADDocument(ydoc);
+    doc.addElement(makeEl('d1'));
+    doc.addElement(makeEl('d2'));
+    doc.addElement(makeEl('keep'));
+    let selIds: string[] = ['d1', 'd2'];
+    const bridge = {
+      getIds: () => selIds,
+      setIds: (ids: string[]) => { selIds = ids; },
+      hitTest: () => null,
+    };
+    const ctx = makeCtx({ doc, selection: bridge });
+    const del = coreModifyPlugin.tools!.find((t) => t.manifest.id === 'delete')!;
+
+    del.handlers.down!(pe(0, 0), ctx);
+    const remaining = doc.getAllElements().map((e) => e.id);
+    expect(remaining).toEqual(['keep']);
+
+    expect(doc.undo()).toBe(true);
+    expect(doc.getAllElements().length).toBe(3);
+  });
+
+  it('Direktklick ohne Selektion löscht getroffenes Element', () => {
+    const { ydoc } = createInMemoryDoc();
+    const doc = new CADDocument(ydoc);
+    const el = makeEl('hitme');
+    el.x = 20;
+    el.y = 20;
+    doc.addElement(el);
+    const bridge = {
+      getIds: () => [] as string[],
+      setIds: () => {},
+      hitTest: () => el,
+    };
+    const ctx = makeCtx({ doc, selection: bridge });
+    const del = coreModifyPlugin.tools!.find((t) => t.manifest.id === 'delete')!;
+
+    del.handlers.down!(pe(20, 20), ctx);
+    expect(doc.getAllElements().length).toBe(0);
+  });
+});
+
+describe('A4.8 pilot: offset tool', () => {
+  it('erzeugt Versatz-Kopie mit Seitenparameter; Original bleibt', () => {
+    const { ydoc } = createInMemoryDoc();
+    const doc = new CADDocument(ydoc);
+    const line = {
+      id: 'src1', type: 'line', layerId: 'l', x: 50, y: 0,
+      width: 100, height: 0,
+      properties: { x1: 0, y1: 0, x2: 100, y2: 0 },
+    } as unknown as CADElement;
+    doc.addElement(line);
+    let selIds: string[] = [];
+    const bridge = {
+      getIds: () => selIds,
+      setIds: (ids: string[]) => { selIds = ids; },
+      hitTest: () => line,
+    };
+    const ctx = makeCtx({ doc, selection: bridge });
+    const off = coreModifyPlugin.tools!.find((t) => t.manifest.id === 'offset')!;
+
+    off.handlers.down!(pe(50, 0), ctx);   // Klick1: Quelle wählen (Basis)
+    off.handlers.down!(pe(50, -30), ctx); // Klick2: Versatz nach oben (side=-1)
+
+    const all = doc.getAllElements();
+    expect(all.length).toBe(2);            // Original + Kopie
+    expect(all[0].id).toBe('src1');        // Original unberührt
+    expect(all[1].id.startsWith('off_')).toBe(true);
+    // side=-1 bei Rechtslaufender Linie → nach OBEN (y kleiner):
+    expect(all[1].properties.y1).toBe(-30);
+    expect(all[1].properties.y2).toBe(-30);
+    expect(all[1].properties.x1).toBe(0);  // x bleibt
+
+    expect(doc.undo()).toBe(true);
+    expect(doc.getAllElements().length).toBe(1);
+  });
+});
+
 describe('A3 pilot: select tool', () => {
   function makeBridge(elements: CADElement[]) {
     let ids: string[] = [];