From 904cec3c4a329cf89fc3219d359239910d61f3f6 Mon Sep 17 00:00:00 2001
From: thing1 <thing1@seacrossedlovers.xyz>
Date: Tue, 28 Jan 2025 09:14:32 +0000
Subject: init commit

---
 autoload/filetype/rust.kak | 209 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 209 insertions(+)
 create mode 100644 autoload/filetype/rust.kak

(limited to 'autoload/filetype/rust.kak')

diff --git a/autoload/filetype/rust.kak b/autoload/filetype/rust.kak
new file mode 100644
index 0000000..3aacc73
--- /dev/null
+++ b/autoload/filetype/rust.kak
@@ -0,0 +1,209 @@
+# http://rust-lang.org
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+# Detection
+# ‾‾‾‾‾‾‾‾‾
+
+hook global BufCreate .*[.](rust|rs) %{
+    set-option buffer filetype rust
+}
+
+# Initialization
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+hook global WinSetOption filetype=rust %<
+    require-module rust
+    hook window ModeChange pop:insert:.* -group rust-trim-indent rust-trim-indent
+    hook window InsertChar \n -group rust-indent rust-indent-on-new-line
+    hook window InsertChar \{ -group rust-indent rust-indent-on-opening-curly-brace
+    hook window InsertChar [)}\]] -group rust-indent rust-indent-on-closing
+    hook -once -always window WinSetOption filetype=.* %{ remove-hooks window rust-.+ }
+>
+
+hook -group rust-highlight global WinSetOption filetype=rust %{
+    add-highlighter window/rust ref rust
+    hook -once -always window WinSetOption filetype=.* %{ remove-highlighter window/rust }
+}
+
+provide-module rust %§
+
+# Highlighters
+# ‾‾‾‾‾‾‾‾‾‾‾‾
+
+add-highlighter shared/rust regions
+add-highlighter shared/rust/code default-region group
+add-highlighter shared/rust/string           region %{(?<!')"} (?<!\\)(\\\\)*"              fill string
+add-highlighter shared/rust/raw_string       region -match-capture %{(?<!')r(#*)"} %{"(#*)} fill string
+
+add-highlighter shared/rust/line_doctest region ^\h*//[!/]\h*```($|should_panic|no_run|ignore|allow_fail|rust|test_harness|compile_fail|E\d{4}|edition201[58]) ^\h*//[!/]\h*```$ regions
+add-highlighter shared/rust/line_doctest/marker region ``` $ group
+add-highlighter shared/rust/line_doctest/marker/fence regex ``` 0:meta
+add-highlighter shared/rust/line_doctest/marker/keywords regex [\d\w] 0:meta # already matched above, just ignore comma
+add-highlighter shared/rust/line_doctest/inner region '^\h*//[!/]( #(?= ))?' '$| ' group
+add-highlighter shared/rust/line_doctest/inner/comment regex //[!/] 0:documentation
+add-highlighter shared/rust/line_doctest/inner/hidden regex '#' 0:meta
+add-highlighter shared/rust/line_doctest/code default-region ref rust
+add-highlighter shared/rust/line_code_rest   region ^\h*//[!/]\h*``` ^\h*//[!/]\h*```$      fill documentation # reset invalid doctest
+add-highlighter shared/rust/line_comment2    region //[!/]{2} $                             fill comment
+add-highlighter shared/rust/line_doc         region //[!/] $                                fill documentation
+add-highlighter shared/rust/line_comment1    region // $                                    group
+add-highlighter shared/rust/line_comment1/comment fill comment
+add-highlighter shared/rust/line_comment1/todo regex (TODO|NOTE|FIXME): 1:meta
+
+add-highlighter shared/rust/block_comment2   region -recurse /\*\*\* /\*\*\* \*/            fill comment
+add-highlighter shared/rust/block_doc        region -recurse /\*\* /\*\* \*/ regions
+add-highlighter shared/rust/block_doc/doctest region ```($|should_panic|no_run|ignore|allow_fail|rust|test_harness|compile_fail|E\d{4}|edition201[58]) ```$ regions
+add-highlighter shared/rust/block_doc/doctest/marker region ``` $ group
+add-highlighter shared/rust/block_doc/doctest/marker/fence regex ``` 0:meta
+add-highlighter shared/rust/block_doc/doctest/marker/keywords regex [\d\w] 0:meta # already matched above, just ignore comma
+add-highlighter shared/rust/block_doc/doctest/inner default-region group
+add-highlighter shared/rust/block_doc/doctest/inner/hidden regex '^\h*\**\h*#' 0:meta
+add-highlighter shared/rust/block_doc/doctest/inner/comment regex ^\h*\* 0:documentation
+add-highlighter shared/rust/block_doc/doctest/inner/code ref rust
+add-highlighter shared/rust/block_doc/code_rest region ``` ``` fill documentation
+add-highlighter shared/rust/block_doc/doc    default-region fill documentation
+add-highlighter shared/rust/block_comment1   region -recurse /\* /\* \*/ group
+add-highlighter shared/rust/block_comment1/comment fill comment
+add-highlighter shared/rust/block_comment1/todo regex (TODO|NOTE|FIXME): 1:meta
+
+add-highlighter shared/rust/macro_attributes region -recurse "\[" "#!?\[" "\]" regions
+add-highlighter shared/rust/macro_attributes/ default-region fill meta
+add-highlighter shared/rust/macro_attributes/string region %{(?<!')"} (?<!\\)(\\\\)*" fill string
+add-highlighter shared/rust/macro_attributes/raw_string region -match-capture %{(?<!')r(#*)"} %{"(#*)} fill string
+
+add-highlighter shared/rust/code/operators_arithmetic   regex (\+|-|/|\*|=|\^|&|\||!|>|<|%)=? 0:operator
+add-highlighter shared/rust/code/operators_as           regex \bas\b 0:operator
+add-highlighter shared/rust/code/ref_ref                regex (&\h+[&~@*])[^)=\s\t\r\n] 1:type
+add-highlighter shared/rust/code/ref                    regex ([&~@*])[^)=\s\t\r\n] 1:type
+add-highlighter shared/rust/code/operators_logic        regex &&|\|\| 0:operator
+
+add-highlighter shared/rust/code/lifetime_or_loop_label regex ('([a-zA-Z]\w+|_\w+))\b 1:meta
+add-highlighter shared/rust/code/namespace              regex \b[a-zA-Z](\w+)?(\h+)?(?=::) 0:module
+add-highlighter shared/rust/code/mod_path_sep           regex :: 0:meta
+add-highlighter shared/rust/code/question_mark          regex \? 0:meta
+# the language keywords are defined here, but many of   them are reserved and unused yet:
+# https://doc.rust-lang.org/reference/keywords.html
+add-highlighter shared/rust/code/function_call          regex _?[a-zA-Z]\w*\s*(?=\() 0:function
+add-highlighter shared/rust/code/generic_function_call  regex _?[a-zA-Z]\w*\s*(?=::<) 0:function
+add-highlighter shared/rust/code/function_declaration   regex (?:fn\h+)(_?\w+)(?:<[^>]+?>)?\( 1:function
+add-highlighter shared/rust/code/keywords               regex \b(?:as|break|continue|crate|else|enum|extern|false|fn|for|if|impl|in|let|loop|match|mod|pub|return|self|Self|struct|super|trait|true|type|union|unsafe|use|where|while|async|await|dyn|abstract|become|box|do|try)\b 0:keyword
+add-highlighter shared/rust/code/storage                regex \b(move|mut|ref|static|const)\b 0:type
+add-highlighter shared/rust/code/pub_with_scope         regex \b(pub)\h*(\()\h*(crate|super|self|in\h+[\w:]+)\h*(\)) 1:keyword 2:meta 4:meta
+# after let can be an arbitrary pattern match
+add-highlighter shared/rust/code/macro                  regex \b\w+! 0:meta
+# the number literals syntax is defined here:
+# https://doc.rust-lang.org/reference/tokens.html#numb  ers
+add-highlighter shared/rust/code/values                 regex \b(?:self|true|false|[0-9][_0-9]*(?:\.[0-9][_0-9]*|(?:\.[0-9][_0-9]*)?E[\+\-][_0-9]+)(?:f(?:32|64))?|(?:0x[_0-9a-fA-F]+|0o[_0-7]+|0b[_01]+|[0-9][_0-9]*)(?:(?:i|u|f)(?:8|16|32|64|128|size))?)\b 0:value
+add-highlighter shared/rust/code/char_character         regex "'([^\\]|\\(.|x[0-9a-fA-F]{2}|u\{[0-9a-fA-F]{1,6}\}))'" 0:value
+# TODO highlight error for unicode or single escape by  te character
+add-highlighter shared/rust/code/byte_character         regex b'([\x00-\x5B\x5D-\x7F]|\\(.|x[0-9a-fA-F]{2}))' 0:value
+add-highlighter shared/rust/code/builtin_types          regex \b(?:u8|u16|u32|u64|u128|usize|i8|i16|i32|i64|i128|isize|f32|f64|bool|char|str|Self)\b 0:type
+add-highlighter shared/rust/code/return                 regex \breturn\b 0:meta
+
+add-highlighter shared/rust/code/enum                   regex \b(Option|Result)\b 0:type
+add-highlighter shared/rust/code/enum_variant           regex \b(Some|None|Ok|Err)\b 0:value
+add-highlighter shared/rust/code/std_traits             regex \b(Copy|Send|Sized|Sync|Drop|Fn|FnMut|FnOnce|Box|ToOwned|Clone|PartialEq|PartialOrd|Eq|Ord|AsRef|AsMut|Into|From|Default|Iterator|Extend|IntoIterator|DoubleEndedIterator|ExactSizeIterator|SliceConcatExt|String|ToString|Vec)\b 0:type
+ 
+# Commands
+# ‾‾‾‾‾‾‾‾
+
+define-command -hidden rust-trim-indent %{
+    # remove trailing white spaces
+    try %{ execute-keys -draft -itersel x s \h+$ <ret> d }
+}
+
+define-command -hidden rust-indent-on-new-line %~
+    evaluate-commands -draft -itersel %@
+        try %{
+            try %[ # line comment
+                evaluate-commands -draft -save-regs '/"' %[
+                    # copy the commenting prefix
+                    execute-keys -save-regs '' k x s ^\h*//[!/]{0,2}\h* <ret> y
+                    try %[
+                        # if the previous comment isn't empty, create a new one
+                        execute-keys x<a-K>^\h*//[!/]{0,2}$<ret> jxs^\h*<ret>P
+                    ] catch %[
+                        # TODO figure out a way to not delete empty comment in current line
+                        # if there is no space and text in the previous comment, remove it completely
+                        execute-keys s //.*<ret> d
+                    ]
+                ]
+            ] catch %[ # block comment
+                # if the previous line isn't within a comment scope, break
+                execute-keys -draft kx <a-k>^(\h*/\*|\h+\*(?!/))<ret>
+
+                # find comment opening, validate it was not closed, and check its using star prefixes
+                execute-keys -draft <a-?>/\*<ret><a-H> <a-K>\*/<ret> <a-k>\A\h*/\*([^\n]*\n\h*\*)*[^\n]*\n\h*.\z<ret>
+
+                try %[
+                    # if the previous line is opening the comment, insert star preceeded by space
+                    execute-keys -draft kx<a-k>^\h*/\*<ret>
+                    execute-keys -draft i*<space><esc>
+                ] catch %[
+                    try %[
+                        # if the next line is a comment line insert a star
+                        execute-keys -draft jx<a-k>^\h+\*<ret>
+                        execute-keys -draft i*<space><esc>
+                    ] catch %[
+                        try %[
+                            # if the previous line is an empty comment line, close the comment scope
+                            execute-keys -draft kx<a-k>^\h+\*\h+$<ret> x1s\*(\h*)<ret>c/<esc>
+                        ] catch %[
+                            # if the previous line is a non-empty comment line, add a star
+                            execute-keys -draft i*<space><esc>
+                        ]
+                    ]
+                ]
+
+                # trim trailing whitespace on the previous line
+                try %[ execute-keys -draft s\h+$<ret> d ]
+                # align the new star with the previous one
+                execute-keys Kx1s^[^*]*(\*)<ret>&
+            ]
+        } catch %`
+            # re-indent previous line if it starts with where to match previous block
+            # string literal parsing within extern does not handle escape
+            try %% execute-keys -draft k x <a-k> ^\h*where\b <ret> hh <a-?> ^\h*\b(impl|((|pub\ |pub\((crate|self|super|in\ (::)?([a-zA-Z][a-zA-Z0-9_]*|_[a-zA-Z0-9_]+)(::[a-zA-Z][a-zA-Z0-9_]*|_[a-zA-Z0-9_]+)*)\)\ )((async\ |const\ )?(unsafe\ )?(extern\ ("[^"]*"\ )?)?fn|struct|enum|union)))\b <ret> <a-S> 1<a-&> %
+            # preserve previous line indent
+            try %{ execute-keys -draft <semicolon> K <a-&> }
+            # indent after lines ending with [{([].+ and move first parameter to own line
+            try %< execute-keys -draft [c[({[],[)}\]] <ret> <a-k> \A[({[][^\n]+\n[^\n]*\n?\z <ret> L i<ret><esc> <gt> <a-S> <a-&> >
+            # indent after non-empty lines not starting with operator and not ending with , or ; or {
+            # XXX simplify this into a single <a-k> without s
+            try %< execute-keys -draft k x s [^\h].+ <ret> <a-K> \A[-+*/&|^})<gt><lt>#] <ret> <a-K> [,<semicolon>{](\h*/[/*].*|)$ <ret> j <a-gt> >
+            # indent after lines ending with {
+            try %+ execute-keys -draft k x <a-k> \{$ <ret> j <a-gt> +
+            # dedent after lines starting with . and ending with } or ) or , or ; or .await (} or ) or .await maybe with ?)
+            try %_ execute-keys -draft k x <a-k> ^\h*\. <ret> <a-k> ([,<semicolon>]|(([})]|\.await)\?*))\h*$ <ret> j <a-lt> _
+            # dedent after lines ending with " => {}" - part of empty match
+            try %# execute-keys -draft k x <a-k> \ =>\ \{\}\h*$ <ret> j <a-lt> #
+            # align to opening curly brace or paren when newline is inserted before a single closing
+            try %< execute-keys -draft <a-h> <a-k> ^\h*[)}] <ret> h m <a-S> 1<a-&> >
+            # todo dedent additional unmatched parenthesis
+            # try %& execute-keys -draft k x s \((?:[^)(]+|\((?:[^)(]+|\([^)(]*\))*\))*\) l Gl s\) %sh{
+                # count previous selections length
+                # printf "j $(echo $kak_selections_length | wc -w) <a-lt>"
+            # } &
+        `
+        # filter previous line
+        try %{ execute-keys -draft k : rust-trim-indent <ret> }
+    @
+~
+
+define-command -hidden rust-indent-on-opening-curly-brace %[
+    evaluate-commands -draft -itersel %~
+        # align indent with opening paren when { is entered on a new line after the closing paren
+        try %[ execute-keys -draft h <a-F> ) M <a-k> \A\(.*\)\h*\n\h*\{\z <ret> s \A|.\z <ret> 1<a-&> ]
+        # dedent standalone { after impl and related block without any { in between
+        try %@ execute-keys -draft hh <a-?> ^\h*\b(impl|((|pub\ |pub\((crate|self|super|in\ (::)?([a-zA-Z][a-zA-Z0-9_]*|_[a-zA-Z0-9_]+)(::[a-zA-Z][a-zA-Z0-9_]*|_[a-zA-Z0-9_]+)*)\)\ )((async\ |const\ )?(unsafe\ )?(extern\ ("[^"]*"\ )?)?fn|struct|enum|union))|if|for)\b <ret> <a-K> \{ <ret> <a-semicolon> <semicolon> ll x <a-k> ^\h*\{$ <ret> <a-lt> @
+    ~
+]
+
+define-command -hidden rust-indent-on-closing %~
+    evaluate-commands -draft -itersel %_
+        # align to opening curly brace or paren when alone on a line
+        try %< execute-keys -draft <a-h> <a-k> ^\h*[)}\]]$ <ret> h m <a-S> 1<a-&> >
+    _
+~
+
+§
-- 
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