95 lines
3.1 KiB
TypeScript
95 lines
3.1 KiB
TypeScript
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/**
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* Task CAD-5 – Block-Editor-Service.
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*
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* openBlockForEdit legt markierte KOPIEN der Block-Elemente ins
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* Dokument (Original unangetastet); saveBlockEdit schreibt die
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* bearbeiteten Kopien als neue Blockdefinition zurueck und
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* raeumt die Edit-Kopien auf; discardBlockEdit verwirft alles.
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* Marker: BLOCK_EDIT_MARKER (properties-Flag + __blockEdit-IDs).
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*/
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import type { CADElement, BlockDefinition } from '../types/cad.types';
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import type { CADDocument } from '../kernel/document/CADDocument';
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/** Marker-Flag in properties der Edit-Kopien. */
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export const BLOCK_EDIT_MARKER = '__blockEdit';
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/** Aktive Edit-Sitzung (Service-State). */
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let editSession: { blockId: string; copyIds: string[] } | null = null;
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/**
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* Oeffnet einen Block zur Bearbeitung: Kopien aller Elemente mit
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* Edit-Marker werden ins Dokument gelegt (Original bleibt).
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* @returns true wenn geoeffnet, false bei unbekannter ID oder
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* bereits offener Sitzung.
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*/
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export function openBlockForEdit(doc: CADDocument, blockId: string): boolean {
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if (editSession) return false;
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const block = doc.getBlock(blockId);
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if (!block) return false;
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const copyIds: string[] = [];
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doc.transact(() => {
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for (const el of block.elements) {
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const copy: CADElement = {
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...el,
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id: `__blockEdit_${blockId}_${copyIds.length}`,
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properties: {
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...(el.properties as Record<string, unknown>),
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[BLOCK_EDIT_MARKER]: true,
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},
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} as unknown as CADElement;
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doc.addElement(copy);
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copyIds.push(copy.id);
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}
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});
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editSession = { blockId, copyIds };
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return true;
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}
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/**
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* Speichert die Bearbeitung: die markierten Kopien werden als
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* neue Elementliste in die Blockdefinition geschrieben (Marker
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* entfernt); Edit-Kopien werden aus dem Dokument geloescht.
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* @returns blockId der gespeicherten Definition oder null.
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*/
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export function saveBlockEdit(doc: CADDocument): string | null {
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if (!editSession) return null;
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const { blockId, copyIds } = editSession;
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const elements: CADElement[] = [];
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for (const id of copyIds) {
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const el = doc.getElement(id);
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if (!el) continue;
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const { [BLOCK_EDIT_MARKER]: _marker, ...cleanProps } =
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el.properties as Record<string, unknown>;
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elements.push({ ...el, id: uid('blk'), properties: cleanProps } as unknown as CADElement);
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}
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const block = doc.getBlock(blockId);
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if (block) {
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doc.addBlock({ ...block, elements });
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}
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doc.deleteElements(copyIds);
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editSession = null;
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return blockId;
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}
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/**
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* Verwirft die Bearbeitung: Edit-Kopien werden geloescht, die
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* Blockdefinition bleibt unveraendert.
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* @returns true wenn verworfen, false ohne offene Sitzung.
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*/
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export function discardBlockEdit(doc: CADDocument): boolean {
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if (!editSession) return false;
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doc.deleteElements(editSession.copyIds);
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editSession = null;
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return true;
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}
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/** Ist gerade eine Block-Bearbeitung offen? */
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export function isBlockEditOpen(): boolean {
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return editSession !== null;
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}
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let uidCounter = 0;
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function uid(prefix: string): string {
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return `${prefix}_${Date.now().toString(36)}_${uidCounter++}_${Math.random().toString(36).slice(2, 8)}`;
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}
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