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No partial matching in theme subsetting #5522

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merged 3 commits into from
Nov 28, 2023
Merged

No partial matching in theme subsetting #5522

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6c51395
Add dollar subsetting for themes
teunbrand Nov 14, 2023
49de544
add test
teunbrand Nov 14, 2023
95fec72
Update R/theme.R
teunbrand Nov 27, 2023
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1 change: 1 addition & 0 deletions NAMESPACE
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@

S3method("$",ggproto)
S3method("$",ggproto_parent)
S3method("$",theme)
S3method("$<-",uneval)
S3method("+",gg)
S3method("[",mapped_discrete)
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5 changes: 5 additions & 0 deletions R/theme.R
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Expand Up @@ -804,5 +804,10 @@ is.subclass <- function(x, y) {
#' @keywords internal
is.theme <- function(x) inherits(x, "theme")

#' @export
`$.theme` <- function(x, ...) {
.subset2(x, ...)
}

#' @export
print.theme <- function(x, ...) utils::str(x)
6 changes: 6 additions & 0 deletions tests/testthat/test-theme.R
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@@ -1,5 +1,11 @@
skip_on_cran() # This test suite is long-running (on cran) and is skipped

test_that("dollar subsetting the theme does no partial matching", {
t <- theme(foobar = 12)
expect_null(t$foo)
expect_equal(t$foobar, 12)
})

test_that("modifying theme element properties with + operator works", {

# Changing a "leaf node" works
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