Add option to allow justification of last system

src/DisplaySettings.ts

@@ -62,6 +62,11 @@ export class DisplaySettings {
      */
     public barCountPerPartial: number = 10;
 
+    /**
+     * Whether the last system (row) should be also justified to the whole width of the music sheet. 
+     * (applies only for page layout).
+     */
+    public justifyLastSystem: boolean = false;
 
     /**
      * Gets or sets the resources used during rendering. This defines all fonts and colors used.

src/generated/DisplaySettingsSerializer.ts

@@ -29,6 +29,7 @@ export class DisplaySettingsSerializer {
         o.set("startbar", obj.startBar);
         o.set("barcount", obj.barCount);
         o.set("barcountperpartial", obj.barCountPerPartial);
+        o.set("justifylastsystem", obj.justifyLastSystem);
         o.set("resources", RenderingResourcesSerializer.toJson(obj.resources));
         o.set("padding", obj.padding);
         o.set("systemslayoutmode", obj.systemsLayoutMode as number);
@@ -60,6 +61,9 @@ export class DisplaySettingsSerializer {
             case "barcountperpartial":
                 obj.barCountPerPartial = v! as number;
                 return true;
+            case "justifylastsystem":
+                obj.justifyLastSystem = v! as boolean;
+                return true;
             case "padding":
                 obj.padding = v as number[] | null;
                 return true;

src/rendering/layout/PageViewLayout.ts

@@ -346,7 +346,7 @@ export class PageViewLayout extends ScoreLayout {
      * Realignes the bars in this line according to the available space
      */
     private fitGroup(group: StaveGroup): void {
-        if (group.isFull || group.width > this.maxWidth) {
+        if (group.isFull || group.width > this.maxWidth || this.renderer.settings.display.justifyLastSystem) {
             group.scaleToWidth(this.maxWidth);
         }
         else {

test/visualTests/features/Layout.test.ts

@@ -1,12 +1,23 @@
 import { LayoutMode } from '@src/LayoutMode';
 import { Settings } from '@src/Settings';
+import { ScoreLoader } from '@src/importer';
+import { TestPlatform } from '@test/TestPlatform';
 import { VisualTestHelper } from '@test/visualTests/VisualTestHelper';
 
 describe('LayoutTests', () => {
-    it('pageLayout', async () => {
+    it('page-layout', async () => {
         await VisualTestHelper.runVisualTest('layout/page-layout.gp');
     });
 
+    it('page-layout-justify-last-row', async () => {
+        const settings = new Settings();
+        settings.display.justifyLastSystem = true;
+
+        const inputFileData = await TestPlatform.loadFile('test-data/visual-tests/layout/page-layout.gp');
+        const score = ScoreLoader.loadScoreFromBytes(inputFileData, settings);
+        await VisualTestHelper.runVisualTestScore(score, 'layout/page-layout-justify-last-row.png', settings);
+    });
+
     it('multi-track', async () => {
         await VisualTestHelper.runVisualTest('layout/multi-track.gp', undefined, [0, 3]);
     });