Add pixel units and left and right padding options for fitView

packages/system/src/types/general.ts

@@ -95,7 +95,8 @@ export type FitViewParamsBase<NodeType extends NodeBase> = {
  * @inline
  */
 export type FitViewOptionsBase<NodeType extends NodeBase = NodeBase> = {
-  padding?: number;
+  padding?: number | [number, number];
+  paddingUnit?: 'px' | '%';
   includeHiddenNodes?: boolean;
   minZoom?: number;
   maxZoom?: number;

packages/system/src/utils/general.ts

@@ -195,10 +195,16 @@ export const getViewportForBounds = (
   height: number,
   minZoom: number,
   maxZoom: number,
-  padding: number
+  padding: number | [number, number],
+  paddingUnit: 'px' | '%'
 ): Viewport => {
-  const xZoom = width / (bounds.width * (1 + padding));
-  const yZoom = height / (bounds.height * (1 + padding));
+  const [paddingX, paddingY] = Array.isArray(padding) ? [padding[0], padding[1]] : [padding, padding];
+
+  const isPixelPadding = paddingUnit === 'px';
+
+  const xZoom = width / (isPixelPadding ? bounds.width + paddingX : bounds.width * (1 + paddingX));
+  const yZoom = height / (isPixelPadding ? bounds.height + paddingY : bounds.height * (1 + paddingY));
+
   const zoom = Math.min(xZoom, yZoom);
   const clampedZoom = clamp(zoom, minZoom, maxZoom);
   const boundsCenterX = bounds.x + bounds.width / 2;

packages/system/src/utils/graph.ts

@@ -372,7 +372,8 @@ export async function fitViewport<
     height,
     options?.minZoom ?? minZoom,
     options?.maxZoom ?? maxZoom,
-    options?.padding ?? 0.1
+    options?.padding ?? 0.1,
+    options?.paddingUnit ?? '%'
   );
 
   await panZoom.setViewport(viewport, { duration: options?.duration });