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### INCLUDE BEGIN
#' @include side-coord-cartesian.R
#' @include ggplot_add.R
#' @include side-facet_.R
#' @include z-depricated.R
NULL
### INCLUDE END
#' @keywords internal
validate_ggside <- function(e2, plot) UseMethod('validate_ggside')
#' @keywords internal
validate_ggside.default <- function(e2, plot) plot
#' @keywords internal
validate_ggside.Facet <- function(e2, plot){
plot[['facet']] <- ggside_facet(plot[['facet']], plot[['ggside']])
plot
}
#' @keywords internal
validate_ggside.Coord <- function(e2, plot) {
plot[["coordinates"]] <- ggside_coord(plot[["coordinates"]])
plot
}
plot_clone <- function(plot) {
p <- plot
p$scales <- plot$scales$clone()
p
}
#' @export
`+.gg` <- function(e1, e2) {
if (missing(e2)) {
abort("Cannot use `+.gg()` with a single argument. Did you accidentally put + on a new line?")
}
e2name <- deparse(substitute(e2))
add_gg(e1 = e1, e2 = e2, e2name = e2name)
}
#' @keywords internal
add_gg <- function(e1, e2, e2name) {
UseMethod("add_gg")
}
#' @keywords internal
add_gg.default <- function(e1, e2, e2name) {
abort(glue("No method defined for class {paste(class(e1),collapse = ', ')}."))
}
#' @keywords internal
add_gg.ggplot <- function(e1, e2, e2name){
if (is.null(e2)) return(e1)
p <- plot_clone(e1)
p <- ggplot_add(object = e2, plot = p, object_name = e2name)
set_last_plot(p)
p
}
#' @importFrom ggplot2 merge_element
#' @keywords internal
add_gg.theme <- function(e1, e2, e2name) {
if (!is.list(e2)) { # in various places in the code base, simple lists are used as themes
abort(glue("Can't add `{e2name}` to a theme object."))
}
# If e2 is a complete theme or e1 is NULL, just return e2
if (is_theme_complete(e2) || is.null(e1))
return(e2)
# Iterate over the elements that are to be updated
for (item in names(e2)) {
x <- merge_element(e2[[item]], e1[[item]])
# Assign it back to e1
# This is like doing e1[[item]] <- x, except that it preserves NULLs.
# The other form will simply drop NULL values
e1[item] <- list(x)
}
# make sure the "complete" attribute is set; this can be missing
# when e1 is an empty list
attr(e1, "complete") <- is_theme_complete(e1)
# Only validate if both themes should be validated
attr(e1, "validate") <-
is_theme_validate(e1) && is_theme_validate(e2)
e1
}
#' @keywords internal
add_gg.ggproto <- function(e1, e2, e2name) {
abort("Cannot add ggproto objects together. Did you forget to add this object to a ggplot object?")
}
#' @keywords internal
add_gg.ggside <- function(e1, e2, e2name) {
p <- NextMethod("add_gg")
p <- clone_ggside_plot(p)
validate_ggside(e2, plot = p)
}
is_theme_complete <- function(x) isTRUE(attr(x, "complete", exact = TRUE))
is_theme_validate <- function(x) {
validate <- attr(x, "validate", exact = TRUE)
if (is.null(validate))
TRUE # we validate by default
else
isTRUE(validate)
}
# # @export
# merge_element.default <- function(new, old) {
# if (is.null(old) || inherits(old, "element_blank")) {
# return(new)
# }
# else if (is.null(new) || is.character(new) || is.numeric(new) ||
# is.unit(new) || is.logical(new)) {
# return(new)
# }
# cli::cli_abort("No method for merging {.cls {class(new)[1]}} into {.cls {class(old)[1]}}.")
# }
#
# merge_element.element <- function(new, old) {
# if (is.null(old) || inherits(old, "element_blank")) {
# return(new)
# }
# if (!inherits(new, class(old)[1])) {
# cli::cli_abort("Only elements of the same class can be merged.")
# }
# idx <- vapply(new, is.null, logical(1))
# idx <- names(idx[idx])
# new[idx] <- old[idx]
# new
# }
#
# merge_element.element_blank <- function(new, old) {
# # If new is element_blank, just return it
# new
# }
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