From 7e72e9ac87fc1c052726202f84a1e16466e06ad4 Mon Sep 17 00:00:00 2001
From: Blista Kanjo
Date: Wed, 2 Aug 2023 22:22:54 -0400
Subject: feat: `zsh` fast-syntax-highlighting plugin

---
 .../zsh-fast-syntax-highlighting/:chroma/-ruby.ch  | 81 ++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 .config/shell/zsh-fast-syntax-highlighting/:chroma/-ruby.ch

(limited to '.config/shell/zsh-fast-syntax-highlighting/:chroma/-ruby.ch')

diff --git a/.config/shell/zsh-fast-syntax-highlighting/:chroma/-ruby.ch b/.config/shell/zsh-fast-syntax-highlighting/:chroma/-ruby.ch
new file mode 100644
index 0000000..3495cc8
--- /dev/null
+++ b/.config/shell/zsh-fast-syntax-highlighting/:chroma/-ruby.ch
@@ -0,0 +1,81 @@
+# -*- mode: sh; sh-indentation: 4; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# Copyright (c) 2018 Sebastian Gniazdowski
+#
+# Chroma function for command `ruby'. It highlights code passed to ruby
+# with -e option - does syntax check by calling `ruby -ce', then highlights
+# as correct or incorrect code.
+#
+# $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
+# $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
+#
+
+(( next_word = 2 | 8192 ))
+
+local __first_call="$1" __wrd="$2" __start_pos="$3" __end_pos="$4"
+local __style
+integer __idx1 __idx2
+
+(( __first_call )) && {
+    # Called for the first time - new command.
+    # FAST_HIGHLIGHT is used because it survives between calls, and
+    # allows to use a single global hash only, instead of multiple
+    # global variables.
+    FAST_HIGHLIGHT[chrome-ruby-got-eswitch]=0
+    return 1
+} || {
+    # Following call, i.e. not the first one.
+
+    # Check if chroma should end – test if token is of type
+    # "starts new command", if so pass-through – chroma ends
+    [[ "$__arg_type" = 3 ]] && return 2
+
+    if (( in_redirection > 0 || this_word & 128 )) || [[ $__wrd == "<<<" ]]; then
+        return 1
+    fi
+
+    if [[ "$__wrd" = -* && ${FAST_HIGHLIGHT[chroma-ruby-got-subcommand]} -eq 0 ]]; then
+        __style=${FAST_THEME_NAME}${${${__wrd:#--*}:+single-hyphen-option}:-double-hyphen-option}
+
+        if [[ "$__wrd" = "-e" || ("$__wrd" = -*e* && "$__wrd" != --*) ]]; then
+            FAST_HIGHLIGHT[chrome-ruby-got-eswitch]=1
+        fi
+    else
+        __wrd="${__wrd//\`/x}"
+        __arg="${__arg//\`/x}"
+        __wrd="${(Q)__wrd}"
+        if (( FAST_HIGHLIGHT[chrome-ruby-got-eswitch] == 1 )); then
+            FAST_HIGHLIGHT[chrome-ruby-got-eswitch]=0
+            if ruby -ce "$__wrd" >/dev/null 2>&1; then
+                # Add correct-subtle style
+                (( __start=__start_pos-${#PREBUFFER}, __end=__end_pos-${#PREBUFFER}, __start >= 0 )) && reply+=("$__start $__end ${FAST_HIGHLIGHT_STYLES[${FAST_THEME_NAME}correct-subtle]}")
+            else
+                # Add incorrect-subtle style
+                (( __start=__start_pos-${#PREBUFFER}, __end=__end_pos-${#PREBUFFER}, __start >= 0 )) && reply+=("$__start $__end ${FAST_HIGHLIGHT_STYLES[${FAST_THEME_NAME}incorrect-subtle]}")
+            fi
+        else
+            # Pass-through to the big-loop outside
+            return 1
+        fi
+        FAST_HIGHLIGHT[chrome-ruby-got-eswitch]=0
+    fi
+}
+
+# Add region_highlight entry (via `reply' array)
+#
+# This is a common place of adding such entry, but any above
+# code can do it itself (and it does) and skip setting __style
+# to 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
+(( this_word = next_word ))
+_start_pos=$_end_pos
+
+return 0
+
+# vim:ft=zsh:et:sw=4
-- 
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