Updates in support of ggplot2 v4.0.0 (#2442)

* Run tests against dev ggplot2

* Take changes from #2440

* Approve (a subset of) new snapshots

* Ensure ticktext/tickvals is atomic character/numeric vector

* Fix geom_sf() break positions

* Fix for geom_violin()

* Update news

* Approve good visual changes

* Approve more visual changes; fix test expectation

* Accept new snapshot

* Zero length ticktext/tickvals should remain NULL

* Zero length vs NULL can actually be meaningful so just safe guard against error

* Approve new snapshot

* Refactor

* Update NEWS.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: cpsievert

.github/workflows/R-CMD-check.yaml

@@ -46,7 +46,7 @@ jobs:
       plotly_api_key: ${{ secrets.PLOTLY_API_KEY }}
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           persist-credentials: false
 

DESCRIPTION

@@ -82,6 +82,7 @@ RoxygenNote: 7.3.2
 Encoding: UTF-8
 Roxygen: list(markdown = TRUE)
 Config/Needs/check:
+    tidyverse/ggplot2,
     rcmdcheck,
     devtools,
     reshape2,

NEWS.md

@@ -668,7 +668,9 @@ gg2list <- function(p, width = NULL, height = NULL,
           "\\*\\s+degree[ ]?[\\*]?", "&#176;", 
           gsub("\"", "", tickData[["degree_label"]])
         )
-        rng[[paste0(xy, ".major")]] <- tickData[[paste0(xy, "_start")]]
+        # Downstream logic expects these 'break positions' to be on 0-1 scale
+        # (which is then rescaled back to the data scale)
+        rng[[paste0(xy, ".major")]] <- scales::rescale(tickData[[paste0(xy, "_start")]])
 
         # If it doesn't already exist (for this panel), 
         # generate graticule (as done in, CoordSf$render_bg)
@@ -742,8 +744,8 @@ gg2list <- function(p, width = NULL, height = NULL,
 
       # https://github.com/tidyverse/ggplot2/pull/3566#issuecomment-565085809
       hasTickText <- !(is.na(ticktext) | is.na(tickvals))
-      ticktext <- ticktext[hasTickText]
-      tickvals <- tickvals[hasTickText]
+      ticktext <- as.character(unlist(ticktext[hasTickText]))
+      tickvals <- as.numeric(unlist(tickvals[hasTickText]))
 
       axisObj <- list(
         # TODO: log type?
@@ -783,8 +785,11 @@ gg2list <- function(p, width = NULL, height = NULL,
       # set scaleanchor/scaleratio if these are fixed coordinates
       # the logic here is similar to what p$coordinates$aspect() does,
       # but the ratio is scaled to the data range by plotly.js 
-      fixed_coords <- c("CoordSf", "CoordFixed", "CoordMap", "CoordQuickmap")
-      if (inherits(p$coordinates, fixed_coords)) {
+      is_fixed <- inherits(
+        p$coordinates,
+        c("CoordSf", "CoordFixed", "CoordMap", "CoordQuickmap")
+      )
+      if (is_fixed || isFALSE(p$coordinates$is_free())) {
         axisObj$scaleanchor <- anchor
         ratio <- p$coordinates$ratio %||% 1
         axisObj$scaleratio <- if (xy == "y") ratio else 1 / ratio
@@ -1436,7 +1441,9 @@ gdef2trace <- function(gdef, theme, gglayout) {
     }
 
     vals <- lapply(gglayout[c("xaxis", "yaxis")], function(ax) {
-      if (identical(ax$tickmode, "auto")) ax$ticktext else ax$tickvals
+      res <- if (identical(ax$tickmode, "auto")) ax$ticktext else ax$tickvals
+      # if zero-length, return NULL to avoid subscript oob errors
+      res %||% NULL
     })
 
     list(

R/ggplotly.R

@@ -197,6 +197,7 @@ to_basic.GeomCol <- function(data, prestats_data, layout, params, p, ...) {
 #' @export
 to_basic.GeomViolin <- function(data, prestats_data, layout, params, p, ...) {
   n <- nrow(data)
+  data <- data[order(data[["y"]], decreasing = FALSE), ]
   revData <- data[order(data[["y"]], decreasing = TRUE), ]
   idx <- !names(data) %in% c("x", "xmin", "xmax")
   data <- rbind(