splitview: expose minimum and maximum size

src/vs/base/browser/ui/grid/gridview.ts

@@ -104,11 +104,11 @@ class BranchNode implements ISplitView, IDisposable {
 	}
 
 	get minimumOrthogonalSize(): number {
-		return this.children.length === 0 ? 0 : this.children.reduce((r, c) => r + c.minimumSize, 0);
+		return this.splitview.minimumSize;
 	}
 
 	get maximumOrthogonalSize(): number {
-		return this.children.length === 0 ? Number.POSITIVE_INFINITY : this.children.reduce((r, c) => r + c.maximumSize, 0);
+		return this.splitview.maximumSize;
 	}
 
 	get minimumWidth(): number {

src/vs/base/browser/ui/splitview/splitview.ts

@@ -146,6 +146,14 @@ export class SplitView implements IDisposable {
 		return this.viewItems.length;
 	}
 
+	get minimumSize(): number {
+		return this.viewItems.reduce((r, item) => r + item.view.minimumSize, 0);
+	}
+
+	get maximumSize(): number {
+		return this.length === 0 ? Number.POSITIVE_INFINITY : this.viewItems.reduce((r, item) => r + item.view.maximumSize, 0);
+	}
+
 	private _orthogonalStartSash: Sash | undefined;
 	get orthogonalStartSash(): Sash | undefined { return this._orthogonalStartSash; }
 	set orthogonalStartSash(sash: Sash | undefined) {