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Allow saving PDF pages #6187

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Allow saving PDF pages #6187

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b682c8a
allow saving pages
teunbrand Nov 15, 2024
78e9cd3
Merge branch 'main' into ggsave_pages
teunbrand Jan 27, 2025
8aadf30
helper to deal with background
teunbrand Jan 27, 2025
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20 changes: 16 additions & 4 deletions R/save.R
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Original file line number Diff line number Diff line change
Expand Up @@ -101,17 +101,18 @@
dev <- validate_device(device, filename, dpi = dpi)
dim <- plot_dim(c(width, height), scale = scale, units = units,
limitsize = limitsize, dpi = dpi)
bg <- get_plot_background(plot, bg)

if (is_null(bg)) {
bg <- calc_element("plot.background", plot_theme(plot))$fill %||% "transparent"
}
old_dev <- grDevices::dev.cur()
dev(filename = filename, width = dim[1], height = dim[2], bg = bg, ...)
on.exit(utils::capture.output({
grDevices::dev.off()
if (old_dev > 1) grDevices::dev.set(old_dev) # restore old device unless null device
}))
grid.draw(plot)
if (!is_bare_list(plot)) {
plot <- list(plot)
}
lapply(plot, grid.draw)
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invisible(filename)
}
Expand Down Expand Up @@ -235,6 +236,17 @@
dim
}

get_plot_background <- function(plot, bg = NULL, default = "transparent") {
if (!is.null(bg)) {
return(bg)

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}
plot <- if (is_bare_list(plot)) plot[[1]] else plot
if (!is.ggplot(plot)) {
return(default)

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}
calc_element("plot.background", plot_theme(plot))$fill %||% default
}

validate_device <- function(device, filename = NULL, dpi = 300, call = caller_env()) {
force(filename)
force(dpi)
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