ui-spacetimechart: fix spacetimechart scaling

When the first waypoint or first x waypoints were hidden, the space time
chart wouldn't display the corresponding curve in linear mode

Signed-off-by: SharglutDev <[email protected]>

Author: SharglutDev

ui-manchette-with-spacetimechart/src/__tests__/helpers.spec.ts

@@ -221,7 +221,7 @@ describe('getScales', () => {
       yZoom: 1,
     });
 
-    expect(result).toHaveLength(1);
+    expect(result).toHaveLength(2);
     expect(result[0].size).toBeDefined();
     expect(result[0].coefficient).not.toBeDefined();
   });

ui-spacetimechart/src/components/SpaceTimeChart.tsx

@@ -107,7 +107,7 @@ export const SpaceTimeChart = (props: SpaceTimeChartProps) => {
     }
 
     const getTimePixel = getTimeToPixel(timeOrigin, timePixelOffset, timeScale);
-    const getSpacePixel = getSpaceToPixel(spaceOrigin, spacePixelOffset, spaceScaleTree);
+    const getSpacePixel = getSpaceToPixel(spacePixelOffset, spaceScaleTree);
     const getPoint = getDataToPoint(getTimePixel, getSpacePixel, timeAxis, spaceAxis);
     const getTime = getPixelToTime(timeOrigin, timePixelOffset, timeScale);
     const getSpace = getPixelToSpace(spaceOrigin, spacePixelOffset, spaceScaleTree);

ui-spacetimechart/src/utils/scales.ts

@@ -153,15 +153,11 @@ export function getPixelToTime(
 }
 
 export function getSpaceToPixel(
-  spaceOrigin: number,
   pixelOffset: number,
   binaryTree: NormalizedScaleTree
 ): SpaceToPixel {
   return (position: number) => {
-    const { from, pixelFrom, coefficient } = getNormalizedScaleAtPosition(
-      position - spaceOrigin,
-      binaryTree
-    );
+    const { from, pixelFrom, coefficient } = getNormalizedScaleAtPosition(position, binaryTree);
     return pixelOffset + pixelFrom + (position - from) / coefficient;
   };
 }