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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| #' Validator for apply_conditional_format | ||
| #' | ||
| #' @param string Target character vector where text may be replaced | ||
| #' @param format_group An integer representing the targeted numeric field within | ||
| #' the string, numbered from left to right | ||
| #' @param condition An expression, using the variable name 'x' as the target | ||
| #' variable within the condition | ||
| #' @param replacement A string to use as the replacement value | ||
| #' @param full_string TRUE if the full string should be replaced, FALSE if the | ||
| #' replacement should be done within the format group | ||
| #' @noRd | ||
| validate_conditional_format_params <- function(string, format_group, condition, replacement, full_string) { | ||
| if (!inherits(string, "character")) { | ||
| stop("Paramter `string` must be a character vector", call.=FALSE) | ||
| } | ||
|
|
||
| if (!inherits(format_group, "numeric") || (inherits(format_group, "numeric") && format_group %% 1 != 0)) { | ||
| stop("Paramter `format_group` must be an integer", call.=FALSE) | ||
| } | ||
|
|
||
| if (!inherits(replacement, "character")) { | ||
| stop("Paramter `replacement` must be a string", call.=FALSE) | ||
| } | ||
|
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| # Condition statement must use the variable name 'x' | ||
| if (!identical(all.vars(condition), "x")) { | ||
| stop("Condition must be a valid expression only using the variable name `x`", call.=FALSE) | ||
| } | ||
|
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||
| if (!inherits(full_string, "logical")) { | ||
| stop("Paramter `full_string` must be bool", call.=FALSE) | ||
| } | ||
|
|
||
| } | ||
|
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| #' Conditional reformatting of a pre-populated string of numbers | ||
| #' | ||
| #' This function allows you to conditionally re-format a string of numbers based | ||
| #' on a numeric value within the string itself. By selecting a "format group", | ||
| #' which is targeting a specific number within the string, a user can establish | ||
| #' a condition upon which a provided replacement string can be used. Either the | ||
| #' entire replacement can be used to replace the entire string, or the | ||
| #' replacement text can refill the "format group" while preserving the original | ||
| #' width and alignment of the target string. | ||
| #' | ||
| #' @param string Target character vector where text may be replaced | ||
| #' @param format_group An integer representing the targeted numeric field within | ||
| #' the string, numbered from left to right | ||
| #' @param condition An expression, using the variable name 'x' as the target | ||
| #' variable within the condition | ||
| #' @param replacement A string to use as the replacement value | ||
| #' @param full_string TRUE if the full string should be replaced, FALSE if the | ||
| #' replacement should be done within the format group | ||
| #' | ||
| #' @return A character vector | ||
| #' @export | ||
| #' | ||
| #' @examples | ||
| #' | ||
| #' string <- c(" 0 (0.0%)", " 8 (9.3%)", "78 (90.7%)") | ||
| #' | ||
| #' apply_conditional_format(string, 2, x == 0, " 0 ", full_string=TRUE) | ||
| #' | ||
| #' apply_conditional_format(string, 2, x < 1, "(<1%)") | ||
| #' | ||
| apply_conditional_format <- function(string, format_group, condition, replacement, full_string=FALSE) { | ||
|
|
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| condition <- enexpr(condition) | ||
|
|
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| # Validate all parameters | ||
| validate_conditional_format_params(string, format_group, condition, replacement, full_string) | ||
|
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||
| # Pull out regex to drive the work | ||
| f_grp_rx <- get_format_group_regex() | ||
|
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| # Pull out all the match groups and then get the numeric for the conditional number | ||
| match_groups <- str_match_all(string, f_grp_rx) | ||
|
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| # Get the number upon which the condition will be evaluated | ||
| x <- map_dbl( | ||
| match_groups, | ||
| ~ if (nrow(.) < format_group) {NA_real_} else {as.double(.[format_group, 2])} | ||
| ) | ||
|
|
||
| # Get the bool vector for where strings should be replaced and handle NAs | ||
| tf <- replace_na(eval(condition), FALSE) | ||
|
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| if (full_string) { | ||
| out_string <- if_else(tf, replacement, string) | ||
| } else { | ||
| # Grab the match locations to use for sub stringing | ||
| match_locs <- str_locate_all(string, f_grp_rx) | ||
| # Get the group length out to ensure that the string is fully padded | ||
| group_length <- map_int( | ||
| match_groups, | ||
| ~ if (nrow(.) < format_group) {NA_integer_} else {as.integer(nchar(.[format_group, 1]))} | ||
| ) | ||
|
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||
| if (any(nchar(replacement) > group_length[!is.na(group_length)])) { | ||
| warning( | ||
| paste0("Replacement string length is longer that some string's format group length.", | ||
| "Some alignment will not be preserved") | ||
| ) | ||
| } | ||
|
|
||
| # Pad at least as long as the format group space | ||
| pad_length <- map_int( | ||
| group_length, | ||
| ~ if_else(nchar(replacement) > ., nchar(replacement), .) | ||
| ) | ||
|
|
||
| # Pull out locs for the format group | ||
| end_locs <- map_int( | ||
| match_locs, | ||
| ~ if (nrow(.) < format_group) {NA_integer_} else {.[format_group, 'end']} | ||
| ) | ||
| start_locs <- end_locs - pad_length + 1 | ||
|
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| # Build the sub string matrix | ||
| sub_mat <- matrix(c(rbind(start_locs, end_locs)), ncol=2, byrow=TRUE) | ||
|
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| # Generate a vector with replacements already done | ||
| rep_string <- string | ||
| str_sub(rep_string, sub_mat) <- str_pad(replacement, pad_length) | ||
|
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| out_string <- if_else(tf, rep_string, string) | ||
| } | ||
|
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| out_string | ||
| } | ||
|
|
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