From 348b96e6d79cebaccd0215b16977d29d7ddfb39d Mon Sep 17 00:00:00 2001
From: Marshall Lochbaum <mwlochbaum@gmail.com>
Date: Fri, 24 Jul 2020 20:18:08 -0400
Subject: Add syntax highlighting and indenting for Kakoune

---
 editors/kak/autoload/filetype/bqn.kak | 78 +++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 editors/kak/autoload/filetype/bqn.kak

diff --git a/editors/kak/autoload/filetype/bqn.kak b/editors/kak/autoload/filetype/bqn.kak
new file mode 100644
index 00000000..7c64cef6
--- /dev/null
+++ b/editors/kak/autoload/filetype/bqn.kak
@@ -0,0 +1,78 @@
+# Detection
+# ‾‾‾‾‾‾‾‾‾
+
+hook global BufCreate .*\.bqn %{
+    set-option buffer filetype bqn
+}
+
+# Initialization
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+hook global WinSetOption filetype=bqn %`
+    require-module bqn
+
+    hook window InsertChar \n -group bqn-indent bqn-indent-on-new-line
+    hook window InsertChar [}⟩\]] -group bqn-indent bqn-indent-on-closing
+    set-option buffer matching_pairs ( ) { } [ ] ⟨ ⟩
+
+    hook -once -always window WinSetOption filetype=.* %{ remove-hooks window bqn-.+ }
+`
+
+hook -group bqn-highlight global WinSetOption filetype=bqn %{
+    add-highlighter window/bqn ref bqn
+    hook -once -always window WinSetOption filetype=.* %{ remove-highlighter window/bqn }
+}
+
+
+provide-module bqn %~
+
+# Highlighters & Completion
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+add-highlighter shared/bqn regions
+add-highlighter shared/bqn/code default-region group
+add-highlighter shared/bqn/comment region "#" "$" fill comment
+add-highlighter shared/bqn/string  region '"' '"' fill string
+add-highlighter shared/bqn/char    region "'.'" "()" fill string
+
+add-highlighter shared/bqn/code/ regex "[{}]" 0:meta
+add-highlighter shared/bqn/code/ regex "[⋄,]" 0:meta
+add-highlighter shared/bqn/code/ regex "[⟨⟩\[\]‿]" 0:magenta
+add-highlighter shared/bqn/code/ regex "[()]" 0:bright-black
+add-highlighter shared/bqn/code/ regex "[:;]" 0:bright-black
+add-highlighter shared/bqn/code/ regex "[←↩→]" 0:normal
+add-highlighter shared/bqn/code/ regex "·" 0:value
+add-highlighter shared/bqn/code/ regex "¯?\b((\d+\.)?\d+(e¯?\d+)?|π|∞)(i¯?((\d+\.)?\d+(e¯?\d+)?|π|∞))?" 0:value
+add-highlighter shared/bqn/code/ regex "[𝕗𝕘𝕨𝕩𝕤]" 0:normal
+add-highlighter shared/bqn/code/ regex "•|•?\b[a-z][A-Z_a-z0-9]*|𝕣" 0:normal
+add-highlighter shared/bqn/code/ regex "[𝔽𝔾𝕎𝕏𝕊+\-×÷⋆√⌊⌈|¬∧∨<>≠=≤≥≡≢⊣⊢⥊∾≍↑↓↕⌽⍉/⍋⍒⊏⊑⊐⊒∊⍷⊔!⍕⍎]" 0:green
+add-highlighter shared/bqn/code/ regex "•?\b[A-Z][A-Z_a-z0-9]*" 0:green
+add-highlighter shared/bqn/code/ regex "[˜˘¨⌜⁼´˝`]" 0:magenta
+add-highlighter shared/bqn/code/ regex "•?\b_[A-Za-z][A-Z_a-z0-9]*|_𝕣" 0:magenta
+add-highlighter shared/bqn/code/ regex "[∘○⊸⟜⌾⊘◶⎉⚇⍟⎊]" 0:yellow
+add-highlighter shared/bqn/code/ regex "•?\b_[A-Za-z][A-Z_a-z0-9]*_|_𝕣_" 0:yellow
+
+# Commands
+# ‾‾‾‾‾‾‾‾
+
+define-command -hidden bqn-indent-on-new-line %`
+    evaluate-commands -draft -itersel %_
+        # preserve previous line indent
+        try %{ execute-keys -draft <semicolon> K <a-&> }
+        # copy # comments prefix
+        try %{ execute-keys -draft <semicolon><c-s>k<a-x> s ^\h*\K#+\h* <ret> y<c-o>P<esc> }
+        # indent after lines ending with { ⟨ [
+        try %( execute-keys -draft k<a-x> <a-k> [{⟨\[]\h*$ <ret> j<a-gt> )
+        # cleanup trailing white spaces on the previous line
+        try %{ execute-keys -draft k<a-x> s \h+$ <ret>d }
+     _
+`
+
+define-command -hidden bqn-indent-on-closing %`
+    evaluate-commands -draft -itersel %_
+        # align to opening bracket
+        try %( execute-keys -draft <a-h> <a-k> ^\h*[}⟩\]]$ <ret> h m <a-S> 1<a-&> )
+    _
+`
+
+~
-- 
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