perf(nad): expose geometryPrecision as a viewer parameter

packages/network-viewer-core/src/network-area-diagram-viewer/nad-viewer-parameters.test.ts

@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2026, RTE (http://www.rte-france.com)
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
+import { NadViewerParameters } from './nad-viewer-parameters';
+
+test('getGeometryPrecision returns undefined when unset, so the writer applies its default', () => {
+    expect(new NadViewerParameters(undefined).getGeometryPrecision()).toBeUndefined();
+    expect(new NadViewerParameters({}).getGeometryPrecision()).toBeUndefined();
+});
+
+test('getGeometryPrecision returns the configured value', () => {
+    expect(new NadViewerParameters({ geometryPrecision: 1 }).getGeometryPrecision()).toBe(1);
+    expect(new NadViewerParameters({ geometryPrecision: 0 }).getGeometryPrecision()).toBe(0);
+});

packages/network-viewer-core/src/network-area-diagram-viewer/nad-viewer-parameters.ts

@@ -151,6 +151,12 @@ export interface NadViewerParametersOptions {
 
     // Whether to create the SVG from diagram metadata, instead of using the SVG content provided as input
     createSvgFromMetadata?: boolean;
+
+    // Number of decimal places for the SVG geometry coordinates when the SVG is (re)built from
+    // metadata (see createSvgFromMetadata and the adaptive zoom). Fewer decimals produce a smaller,
+    // faster-to-parse SVG at the cost of coordinate accuracy. Defaults to 2, which keeps the
+    // generated SVG identical to before this option existed.
+    geometryPrecision?: number;
 }
 
 export class NadViewerParameters {
@@ -266,4 +272,10 @@ export class NadViewerParameters {
             NadViewerParameters.CREATE_SVG_FROM_METADATA_DEFAULT
         );
     }
+
+    // Returns the configured geometry precision, or undefined to let the SVG writer apply its own
+    // default (DEFAULT_GEOMETRY_PRECISION).
+    public getGeometryPrecision(): number | undefined {
+        return this.nadViewerParametersOptions?.geometryPrecision;
+    }
 }

packages/network-viewer-core/src/network-area-diagram-viewer/network-area-diagram-viewer.ts

@@ -176,7 +176,10 @@ export class NetworkAreaDiagramViewer {
         this.diagramMetadata = diagramMetadata;
         this.nadViewerParameters = new NadViewerParameters(nadViewerParametersOptions ?? undefined);
         if (this.nadViewerParameters.getCreateSvgFromMetadata() && this.diagramMetadata != null) {
-            this.svgWriter = new SvgWriter({ diagramMetadata: this.diagramMetadata });
+            this.svgWriter = new SvgWriter({
+                diagramMetadata: this.diagramMetadata,
+                geometryPrecision: this.nadViewerParameters.getGeometryPrecision(),
+            });
             this.svgContent = this.svgWriter.getEmptySvg();
         }
         this.width = 0;
@@ -2194,6 +2197,7 @@ export class NetworkAreaDiagramViewer {
                 diagramMetadata: this.diagramMetadata,
                 elementList: { nodes: nodes, edges: edges },
                 voltageLevels: maxDisplayedSize > nodeVlThreshold.threshold ? nodeVlThreshold.voltageLevels : undefined,
+                geometryPrecision: this.nadViewerParameters.getGeometryPrecision(),
             });
             svgWriter.addNodes(<SVGGElement>this.nodesSection!);
             svgWriter.addEdgesAndInfos(<SVGGElement>this.edgesSection!);