Merge pull request #221 from af83/5465-dezoom-map-if-too-close-to-borders

5465 Dezoom map if stop areas are too cleose to borders

1 files changed, 14 insertions, 0 deletions

diff --git a/app/javascript/packs/routes/show.js b/app/javascript/packs/routes/show.js
index 4d91ace13..71777c379 100644
--- a/app/javascript/packs/routes/show.js
+++ b/app/javascript/packs/routes/show.js
@@ -105,3 +105,17 @@ const boundaries = ol.extent.applyTransform(
   ol.extent.boundingExtent(area), ol.proj.getTransform('EPSG:4326', 'EPSG:3857')
 )
 map.getView().fit(boundaries, map.getSize());
+let tooCloseToBounds = false
+const mapBoundaries = map.getView().calculateExtent(map.getSize())
+const mapWidth = mapBoundaries[2] - mapBoundaries[0]
+const mapHeight = mapBoundaries[3] - mapBoundaries[1]
+const marginSize = 0.1
+const heightMargin = marginSize * mapHeight
+const widthMargin = marginSize * mapWidth
+tooCloseToBounds = tooCloseToBounds || (boundaries[0] - mapBoundaries[0]) < widthMargin
+tooCloseToBounds = tooCloseToBounds || (mapBoundaries[2] - boundaries[2]) < widthMargin
+tooCloseToBounds = tooCloseToBounds || (boundaries[1] - mapBoundaries[1]) < heightMargin
+tooCloseToBounds = tooCloseToBounds || (mapBoundaries[3] - boundaries[3]) < heightMargin
+if(tooCloseToBounds){
+  map.getView().setZoom(map.getView().getZoom() - 1)
+}