[charts] Fix undefined behaving differently than missing value for axis size

Author: bernardobelchior

packages/x-charts/src/internals/plugins/featurePlugins/useChartCartesianAxis/defaultizeAxis.ts

@@ -20,10 +20,10 @@ export function defaultizeAxis(
   dataset: Readonly<DatasetType> | undefined,
   axisName: 'y',
 ): AxisConfig<ScaleName, any, ChartsYAxisProps>[];
-export function defaultizeAxis(
+export function defaultizeAxis<Axis = 'x' | 'y'>(
   inAxis: readonly MakeOptional<AxisConfig, 'id'>[] | undefined,
   dataset: Readonly<DatasetType> | undefined,
-  axisName: 'x' | 'y',
+  axisName: Axis,
 ): AxisConfig[] {
   const DEFAULT_AXIS_KEY = axisName === 'x' ? DEFAULT_X_AXIS_KEY : DEFAULT_Y_AXIS_KEY;
 
@@ -45,29 +45,25 @@ export function defaultizeAxis(
     const position = axisConfig.position ?? 'none';
     const dimension = axisName === 'x' ? 'height' : 'width';
 
-    const height =
-      axisName === 'x'
-        ? DEFAULT_AXIS_SIZE_HEIGHT + (axisConfig.label ? AXIS_LABEL_DEFAULT_HEIGHT : 0)
-        : 0;
-    const width =
-      axisName === 'y'
-        ? DEFAULT_AXIS_SIZE_WIDTH + (axisConfig.label ? AXIS_LABEL_DEFAULT_HEIGHT : 0)
-        : 0;
-
     const sharedConfig = {
       id: `defaultized-${axisName}-axis-${index}`,
       // The fist axis is defaultized to the bottom/left
       ...(index === 0 ? { position: defaultPosition } : {}),
-      height,
-      width,
       offset: offsets[position],
       ...axisConfig,
     };
 
+    if (axisName === 'x') {
+      const height = DEFAULT_AXIS_SIZE_HEIGHT + (axisConfig.label ? AXIS_LABEL_DEFAULT_HEIGHT : 0);
+      (sharedConfig as any).height = (axisConfig as any).height ?? height;
+    } else if (axisName === 'y') {
+      const width = DEFAULT_AXIS_SIZE_WIDTH + (axisConfig.label ? AXIS_LABEL_DEFAULT_HEIGHT : 0);
+      (sharedConfig as any).width = (axisConfig as any).width ?? width;
+    }
+
     // Increment the offset for the next axis
     if (position !== 'none') {
-      offsets[position] +=
-        (axisConfig as any)[dimension] ?? (dimension === 'height' ? height : width);
+      offsets[position] += (sharedConfig as any)[dimension];
     }
 
     // If `dataKey` is NOT provided