strtrim_sgr: Control Sequence Aware Version of strtrim

View source: R/strtrim.R

strtrim_sgrR Documentation

Control Sequence Aware Version of strtrim

Description

These functions are deprecated in favor of the strtrim_ctl flavors.

Usage

strtrim_sgr(
  x,
  width,
  warn = getOption("fansi.warn", TRUE),
  normalize = getOption("fansi.normalize", FALSE),
  carry = getOption("fansi.carry", FALSE),
  terminate = getOption("fansi.terminate", TRUE)
)

strtrim2_sgr(
  x,
  width,
  warn = getOption("fansi.warn", TRUE),
  tabs.as.spaces = getOption("fansi.tabs.as.spaces", FALSE),
  tab.stops = getOption("fansi.tab.stops", 8L),
  normalize = getOption("fansi.normalize", FALSE),
  carry = getOption("fansi.carry", FALSE),
  terminate = getOption("fansi.terminate", TRUE)
)

Arguments

x

a character vector, or an object which can be coerced to a character vector by as.character.

width

Positive integer values: recycled to the length of x.

warn

TRUE (default) or FALSE, whether to warn when potentially problematic Control Sequences are encountered. These could cause the assumptions fansi makes about how strings are rendered on your display to be incorrect, for example by moving the cursor (see ?fansi). At most one warning will be issued per element in each input vector. Will also warn about some badly encoded UTF-8 strings, but a lack of UTF-8 warnings is not a guarantee of correct encoding (use validUTF8 for that).

normalize

TRUE or FALSE (default) whether SGR sequence should be normalized out such that there is one distinct sequence for each SGR code. normalized strings will occupy more space (e.g. "\033[31;42m" becomes "\033[31m\033[42m"), but will work better with code that assumes each SGR code will be in its own escape as crayon does.

carry

TRUE, FALSE (default), or a scalar string, controls whether to interpret the character vector as a "single document" (TRUE or string) or as independent elements (FALSE). In "single document" mode, active state at the end of an input element is considered active at the beginning of the next vector element, simulating what happens with a document with active state at the end of a line. If FALSE each vector element is interpreted as if there were no active state when it begins. If character, then the active state at the end of the carry string is carried into the first element of x (see "Replacement Functions" for differences there). The carried state is injected in the interstice between an imaginary zeroeth character and the first character of a vector element. See the "Position Semantics" section of substr_ctl and the "State Interactions" section of ?fansi for details. Except for strwrap_ctl where NA is treated as the string "NA", carry will cause NAs in inputs to propagate through the remaining vector elements.

terminate

TRUE (default) or FALSE whether substrings should have active state closed to avoid it bleeding into other strings they may be prepended onto. This does not stop state from carrying if carry = TRUE. See the "State Interactions" section of ?fansi for details.

tabs.as.spaces

FALSE (default) or TRUE, whether to convert tabs to spaces. This can only be set to TRUE if strip.spaces is FALSE.

tab.stops

integer(1:n) indicating position of tab stops to use when converting tabs to spaces. If there are more tabs in a line than defined tab stops the last tab stop is re-used. For the purposes of applying tab stops, each input line is considered a line and the character count begins from the beginning of the input line.

Value

Like base::strtrim, except that Control Sequences are treated as zero width.


fansi documentation built on Jan. 23, 2023, 5:28 p.m.