Move CRS responsibility from GuideAxis to CoordSf (#5440)

* Move CRS responsibility to CoordSf

* Fix typo

Author: teunbrand

R/coord-sf.R

@@ -255,19 +255,24 @@ CoordSf <- ggproto("CoordSf", CoordCartesian,
     graticule$y_start <- sf_rescale01_x(graticule$y_start, y_range)
     graticule$y_end <- sf_rescale01_x(graticule$y_end, y_range)
 
-    list(
+    list2(
       x_range = x_range,
       y_range = y_range,
       graticule = graticule,
       crs = params$crs,
       default_crs = params$default_crs,
-      viewscales = viewscales
+      !!!viewscales
     )
   },
 
-  setup_panel_guides = function(self, panel_params, guides, params = list()) {
-    params <- Coord$setup_panel_guides(panel_params$viewscales, guides, params)
-    c(params, panel_params)
+  train_panel_guides = function(self, panel_params, layers, params = list()) {
+    # The guide positions are already in the target CRS, so we mask the default
+    # CRS to prevent a double transformation.
+    panel_params$guides <- ggproto_parent(Coord, self)$train_panel_guides(
+      vec_assign(panel_params, "default_crs", panel_params["crs"]),
+      layers, params
+    )$guides
+    panel_params
   },
 
   backtransform_range = function(self, panel_params) {

R/guide-axis.R

@@ -135,11 +135,6 @@ GuideAxis <- ggproto(
       return(params)
     }
 
-    if (inherits(coord, "CoordSf")) {
-      # Positions already given in target crs
-      panel_params$default_crs <- panel_params$crs
-    }
-
     aesthetics <- names(key)[!grepl("^\\.", names(key))]
     if (!all(c("x", "y") %in% aesthetics)) {
       other_aesthetic <- setdiff(c("x", "y"), aesthetics)