74 lines
2.0 KiB
TypeScript
74 lines
2.0 KiB
TypeScript
import { createOpaqueId } from "../core/ids";
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import { cloneEditorSelection, type EditorSelection } from "../core/selection";
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import type { ToolMode } from "../core/tool-mode";
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import { cloneTerrain, type Terrain } from "../document/terrains";
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import type { EditorCommand } from "./command";
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export function createDeleteTerrainCommand(terrainId: string): EditorCommand {
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let deletedTerrain: Terrain | null = null;
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let previousSelection: EditorSelection | null = null;
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let previousToolMode: ToolMode | null = null;
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return {
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id: createOpaqueId("command"),
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label: "Delete terrain",
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execute(context) {
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const currentDocument = context.getDocument();
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const terrain = currentDocument.terrains[terrainId];
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if (terrain === undefined) {
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throw new Error(`Terrain ${terrainId} does not exist.`);
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}
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if (deletedTerrain === null) {
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deletedTerrain = cloneTerrain(terrain);
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}
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if (previousSelection === null) {
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previousSelection = cloneEditorSelection(context.getSelection());
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}
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if (previousToolMode === null) {
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previousToolMode = context.getToolMode();
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}
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const nextTerrains = {
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...currentDocument.terrains
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};
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delete nextTerrains[terrainId];
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context.setDocument({
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...currentDocument,
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terrains: nextTerrains
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});
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context.setSelection({
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kind: "none"
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});
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context.setToolMode("select");
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},
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undo(context) {
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if (deletedTerrain === null) {
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return;
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}
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const currentDocument = context.getDocument();
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context.setDocument({
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...currentDocument,
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terrains: {
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...currentDocument.terrains,
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[deletedTerrain.id]: cloneTerrain(deletedTerrain)
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}
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});
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if (previousSelection !== null) {
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context.setSelection(previousSelection);
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}
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if (previousToolMode !== null) {
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context.setToolMode(previousToolMode);
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}
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}
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};
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}
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