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authorkj-sh6042025-07-16 22:10:52 -0400
committerkj-sh6042025-07-16 22:10:52 -0400
commit1e204d36c1fab9884f65618ccca019d8cd5f9386 (patch)
tree962ebadaa02a15d2f8441b290daf330bfbd48417 /.config/shell/zsh-fast-syntax-highlighting/:chroma/-example.ch
parent7c9e54b5366ada655baf8c2b61914182840d6bb6 (diff)
refactor: update `zsh-fast-syntax-highlighting` plugin
Diffstat (limited to '.config/shell/zsh-fast-syntax-highlighting/:chroma/-example.ch')
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-# -*- mode: sh; sh-indentation: 4; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
-# Copyright (c) 2018 Sebastian Gniazdowski
-#
-# Example chroma function. It colorizes first two arguments as `builtin' style,
-# third and following arguments as `globbing' style. First two arguments may
-# be "strings", they will be passed through to normal higlighter (by returning 1).
-#
-# $1 - 0 or 1, denoting if it's first call to the chroma, or following one
-#
-# $2 - the current token, also accessible by $__arg from the above scope -
-# basically a private copy of $__arg; the token can be eg.: "grep"
-#
-# $3 - a private copy of $_start_pos, i.e. the position of the token in the
-# command line buffer, used to add region_highlight entry (see man),
-# because Zsh colorizes by *ranges* in command line buffer
-#
-# $4 - a private copy of $_end_pos from the above scope
-#
-#
-# Overall functioning is: when command "example" is occured, this function
-# is called with $1 == 1, it ("example") is the first token ($2), then for any
-# following token, this function is called with $1 == 0, until end of command
-# is occured (i.e. till enter is pressed or ";" is put into source, or the
-# command line simply ends).
-#
-# Other tips are:
-# - $CURSOR holds cursor position
-# - $BUFFER holds whole command line buffer
-# - $LBUFFER holds command line buffer that is left from the cursor, i.e. it's a
-# BUFFER substring 1 .. $CURSOR
-# - $RBUFFER is the same as LBUFFER but holds part of BUFFER right to the cursor
-#
-# The function receives $BUFFER but via sequence of tokens, which are shell words,
-# e.g. "a b c" is a shell word, while a b c are 3 shell words.
-#
-# FAST_HIGHLIGHT is a friendly hash array which allows to store strings without
-# creating global parameters (variables). If you need hash, just use it first
-# declaring, under some distinct name like: typeset -gA CHROMA_EXPLE_DICT.
-# Remember to reset the hash and others at __first_call == 1, so that you have
-# a fresh state for new command.
-
-# Keep chroma-takever state meaning: until ;, handle highlighting via chroma.
-# So the below 8192 assignment takes care that next token will be routed to chroma.
-(( next_word = 2 | 8192 ))
-
-local __first_call="$1" __wrd="$2" __start_pos="$3" __end_pos="$4"
-local __style
-integer __idx1 __idx2
-
-(( __first_call )) && {
- # Called for the first time - new command.
- # FAST_HIGHLIGHT is used because it survives between calls, and
- # allows to use a single global hash only, instead of multiple
- # global string variables.
- FAST_HIGHLIGHT[chroma-example-counter]=0
-
- # Set style for region_highlight entry. It is used below in
- # '[[ -n "$__style" ]] ...' line, which adds highlight entry,
- # like "10 12 fg=green", through `reply' array.
- #
- # Could check if command `example' exists and set `unknown-token'
- # style instead of `command'
- __style=${FAST_THEME_NAME}command
-
-} || {
- # Following call, i.e. not the first one
-
- # Check if chroma should end – test if token is of type
- # "starts new command", if so pass-through – chroma ends
- [[ "$__arg_type" = 3 ]] && return 2
-
- if (( in_redirection > 0 || this_word & 128 )) || [[ $__wrd == "<<<" ]]; then
- return 1
- fi
-
- if [[ "$__wrd" = -* ]]; then
- # Detected option, add style for it.
- [[ "$__wrd" = --* ]] && __style=${FAST_THEME_NAME}double-hyphen-option || \
- __style=${FAST_THEME_NAME}single-hyphen-option
- else
- # Count non-option tokens
- (( FAST_HIGHLIGHT[chroma-example-counter] += 1, __idx1 = FAST_HIGHLIGHT[chroma-example-counter] ))
-
- # Colorize 1..2 as builtin, 3.. as glob
- if (( FAST_HIGHLIGHT[chroma-example-counter] <= 2 )); then
- if [[ "$__wrd" = \"* ]]; then
- # Pass through, fsh main code will do the highlight!
- return 1
- else
- __style=${FAST_THEME_NAME}builtin
- fi
- else
- __style=${FAST_THEME_NAME}globbing
- fi
- fi
-}
-
-# Add region_highlight entry (via `reply' array).
-# If 1 will be added to __start_pos, this will highlight "oken".
-# If 1 will be subtracted from __end_pos, this will highlight "toke".
-# $PREBUFFER is for specific situations when users does command \<ENTER>
-# i.e. when multi-line command using backslash is entered.
-#
-# This is a common place of adding such entry, but any above code can do
-# it itself (and it does in other chromas) and skip setting __style to
-# this way disable this code.
-[[ -n "$__style" ]] && (( __start=__start_pos-${#PREBUFFER}, __end=__end_pos-${#PREBUFFER}, __start >= 0 )) && reply+=("$__start $__end ${FAST_HIGHLIGHT_STYLES[$__style]}")
-
-# We aren't passing-through, do obligatory things ourselves.
-# _start_pos=$_end_pos advainces pointers in command line buffer.
-#
-# To pass through means to `return 1'. The highlighting of
-# this single token is then done by fast-syntax-highlighting's
-# main code and chroma doesn't have to do anything.
-(( this_word = next_word ))
-_start_pos=$_end_pos
-
-return 0
-
-# vim:ft=zsh:et:sw=4