From dca6ad4822576f38f6a18e34a726d86379090205 Mon Sep 17 00:00:00 2001
From: Ben Davenport-Ray <ben.davenportray@gmail.com>
Date: Sat, 6 Jan 2018 14:37:43 -0500
Subject: [PATCH] Add Scheme support

---
 rc/extra/scheme.kak | 132 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 rc/extra/scheme.kak

diff --git a/rc/extra/scheme.kak b/rc/extra/scheme.kak
new file mode 100644
index 00000000..741e9c0d
--- /dev/null
+++ b/rc/extra/scheme.kak
@@ -0,0 +1,132 @@
+# http://www.scheme-reports.org
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+# require lisp.kak
+
+# Detection
+# ‾‾‾‾‾‾‾‾‾
+
+hook global BufCreate (.*/)?(.*\.(scm|ss|sld)) %{
+    set-option buffer filetype scheme
+}
+
+# Highlighters
+# ‾‾‾‾‾‾‾‾‾‾‾‾
+
+add-highlighter shared/scheme regions
+add-highlighter shared/scheme/code default-region group
+
+add-highlighter shared/scheme/string region '"' (?<!\\)(\\\\)*" fill string
+add-highlighter shared/scheme/comment region ';' '$' fill comment
+add-highlighter shared/scheme/comment-form region -recurse "\(" "#;\(" "\)" fill comment
+add-highlighter shared/scheme/comment-block region "#\|" "\|#" fill comment
+add-highlighter shared/scheme/quoted-form region -recurse "\(" "'\(" "\)" fill variable
+
+add-highlighter shared/scheme/code/ regex (#t|#f) 0:value
+add-highlighter shared/scheme/code/ regex \b[0-9]+\.[0-9]*\b 0:value
+
+evaluate-commands %sh{
+
+	# Primitive expressions that cannot be derived.
+	keywords='define do let let* letrec if cond case and or begin lambda delay delay-force set!'
+
+	# Macro expressions.
+	meta="define-syntax let-syntax letrec-syntax syntax-rules syntax-case"
+
+	# Basic operators.
+	operators='* + - ... / < <= = => > >='
+
+	# Procedures that create a base type and their predicates (for easier type checking)
+	types="list vector bytevector cons string boolean? list? pair?
+	vector? bytevector? string? char? complex? eof-object? input-port?
+	null? number? output-port? procedure? symbol?"
+
+	# R5RS available procedures
+	builtins="abs acos angle append apply asin assoc assq assv atan
+                caaaar caaadr caaar caadar caaddr caadr
+            	caar cadaar cadadr cadar caddar cadddr caddr cadr
+            	call-with-current-continuation call-with-input-file
+            	call-with-output-file call-with-values car cdaaar cdaadr cdaar
+            	cdadar cdaddr cdadr cdar cddaar cddadr cddar cdddar cddddr cdddr
+            	cddr cdr ceiling char->integer char-alphabetic? char-ci<=?
+            	char-ci<? char-ci=? char-ci>=? char-ci>? char-downcase
+            	char-lower-case? char-numeric? char-ready? char-upcase
+            	char-upper-case? char-whitespace? char<=? char<? char=?
+            	char>=? char>?	close-input-port close-output-port  cons cos
+            	current-input-port current-output-port denominator display
+            	dynamic-wind else  eq? equal? eqv? eval even? exact->inexact
+            	exact? exp expt floor for-each force gcd imag-part inexact->exact
+            	inexact?  integer->char integer? interaction-environment lcm
+            	length list list->string list->vector list-ref list-tail  load log
+            	magnitude make-polar make-rectangular make-string make-vector
+            	map max member memq memv min modulo negative? newline not
+            	null-environment  number->string numerator odd? open-input-file
+            	open-output-file or peek-char positive?  quasiquote quote quotient
+            	rational? rationalize read read-char real-part real? remainder
+            	reverse round scheme-report-environment set-car! set-cdr! sin
+            	sqrt string->list string->number string->symbol string-append
+            	string-ci<=? string-ci<? string-ci=? string-ci>=?
+            	string-ci>? string-copy string-fill! string-length string-ref
+            	string-set! string<=? string<? string=? string>=? string>?
+            	substring symbol->string   tan truncate values vector
+            	vector->list vector-fill! vector-length vector-ref vector-set!
+            	with-input-from-file with-output-to-file write write-char zero?"
+
+    join () { printf "%s" "$1" | tr -s ' \n\t' "$2"; }
+
+    printf '%s\n' "hook global WinSetOption filetype=scheme %{
+        	set-option window static_words '$(join "$keywords:$meta:$operators:$builtins" ':' )'
+    }"
+
+    exact_quote () {
+		for symbol in "$@"
+		do
+			printf '\\Q%s\\E ' "$symbol"
+		done
+    }
+
+    qkeys=$(join "$(exact_quote $keywords)" '|')
+    qmeta=$(join "$(exact_quote $meta)" '|')
+    qops=$(join "$(exact_quote "$operators")" '|')
+    qbuiltins=$(join "$(exact_quote $builtins)" '|')
+    qtypes=$(join "$(exact_quote $types)" '|')
+
+	non_word_chars='[\s\(\)\[\]\{\};\|]'
+	normal_identifiers='-!$%&\*\+\./:<=>\?\^_~a-zA-Z0-9'
+	identifier_chars="[${normal_identifiers}][${normal_identifiers},#]*"
+
+	add_highlighter () {
+    	printf '%s\n' "add-highlighter shared/scheme/code/ regex \"$1\" $2"
+	}
+
+    add_highlighter "${non_word_chars}+(${qkeys})${non_word_chars}" "1:keyword"
+    add_highlighter "${non_word_chars}+(${qmeta})${non_word_chars}" "1:meta"
+    add_highlighter "${non_word_chars}+(${qops})${non_word_chars}" "1:operator"
+    add_highlighter "${non_word_chars}+(${qbuiltins})${non_word_chars}" "1:builtin"
+    add_highlighter "${non_word_chars}+('${identifier_chars})" "1:attribute"
+    add_highlighter "${non_word_chars}+(${qtypes})${non_word_chars}" "1:type"
+    add_highlighter "\(define\W+\(($identifier_chars)" "1:function"
+    add_highlighter "\(define\W+($identifier_chars)\W+\(lambda" "1:function"
+}
+
+# Initialization
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+hook -group scheme-highlight global WinSetOption filetype=scheme %{
+    add-highlighter window/scheme ref scheme
+}
+
+hook -group scheme-highlight global WinSetOption filetype=(?!scheme).* %{
+    remove-highlighter window/scheme
+}
+
+hook global WinSetOption filetype=scheme %{
+	set-option -add buffer extra_word_chars %{-:!:%:?:<:>:=}
+    hook window InsertEnd  .* -group scheme-hooks  lisp-filter-around-selections
+    hook window InsertChar \n -group scheme-indent lisp-indent-on-new-line
+}
+
+hook global WinSetOption filetype=(?!scheme).* %{
+    remove-hooks window scheme-indent
+    remove-hooks window scheme-hooks
+}