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+# http://scala-lang.org
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+# Detection
+# ‾‾‾‾‾‾‾‾‾
+
+hook global BufCreate .*[.](scala|sbt|sc) %{
+    set-option buffer filetype scala
+}
+
+# Initialization
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+hook global WinSetOption filetype=scala %[
+    require-module scala
+
+    hook window ModeChange pop:insert:.* -group scala-trim-indent scala-trim-indent
+    hook window InsertChar \n -group scala-insert scala-insert-on-new-line
+    hook window InsertChar \n -group scala-indent scala-indent-on-new-line
+    hook window InsertChar \} -group scala-indent scala-indent-on-closing-curly-brace
+
+    hook -once -always window WinSetOption filetype=.* %{ remove-hooks window scala-.+ }
+]
+
+hook -group scala-highlight global WinSetOption filetype=scala %{
+    add-highlighter window/scala ref scala
+    hook -once -always window WinSetOption filetype=.* %{ remove-highlighter window/scala }
+}
+
+
+provide-module scala %[
+
+# Highlighters
+# ‾‾‾‾‾‾‾‾‾‾‾‾
+
+add-highlighter shared/scala regions
+add-highlighter shared/scala/code default-region group
+add-highlighter shared/scala/string       region '"' (?<!\\)(\\\\)*"   fill string
+add-highlighter shared/scala/literal      region `    `                fill variable
+add-highlighter shared/scala/comment      region -recurse /[*] /[*] [*]/  fill comment
+add-highlighter shared/scala/line_comment region //   $                fill comment
+
+# Keywords are collected at
+# http://tutorialspoint.com/scala/scala_basic_syntax.htm
+
+add-highlighter shared/scala/code/ regex (?:\b|\W)(@\w+|import|package)\b 0:meta
+add-highlighter shared/scala/code/ regex \b(true|false|null)\b 0:value
+add-highlighter shared/scala/code/ regex \b(?:class|extends|with)\s+(\w+) 0:type
+add-highlighter shared/scala/code/ regex \b([A-Z]\w*)\b 0:type
+add-highlighter shared/scala/code/ regex (?:def|var|val)\s+(\w+) 0:variable
+add-highlighter shared/scala/code/ regex \b(become|case|catch|class|def|do|else|extends|final|finally|for|forSome|goto|if|initialize|macro|match|new|object|onTransition|return|startWith|stay|this|super|throw|trait|try|unbecome|using|val|var|when|while|with|yield)\b 0:keyword
+add-highlighter shared/scala/code/ regex \b(abstract|final|implicit|implicitly|lazy|override|private|protected|require|sealed)\b 0:attribute
+add-highlighter shared/scala/code/ regex (\[|\]|=>|<:|:>|=:=|::|&&|\|\|) 0:operator
+
+# Commands
+# ‾‾‾‾‾‾‾‾
+
+define-command -hidden scala-trim-indent %{
+    # remove trailing white spaces
+    try %{ execute-keys -draft -itersel x s \h+$ <ret> d }
+}
+
+define-command -hidden scala-insert-on-new-line %[
+    evaluate-commands -draft -itersel %[
+        # copy // comments prefix and following white spaces
+        try %{ execute-keys -draft <semicolon><c-s>kx s ^\h*\K#\h* <ret> y<c-o>P<esc> }
+    ]
+]
+
+define-command -hidden scala-indent-on-new-line %[
+    evaluate-commands -draft -itersel %[
+        # preserve previous line indent
+        try %[ execute-keys -draft <semicolon> K <a-&> ]
+        # filter previous line
+        try %[ execute-keys -draft k : scala-trim-indent <ret> ]
+        # indent after lines ending with {
+        try %[ execute-keys -draft k x <a-k> \{$ <ret> j <a-gt> ]
+        # deindent closing brace when after cursor
+        try %[ execute-keys -draft x <a-k> ^\h*\} <ret> gh / \} <ret> m <a-S> 1<a-&> ]
+    ]
+]
+
+define-command -hidden scala-indent-on-closing-curly-brace %[
+    evaluate-commands -draft -itersel %[
+        # align to opening curly brace when alone on a line
+        try %[ execute-keys -draft <a-h> <a-k> ^\h+\}$ <ret> m s \A|.\z <ret> 1<a-&> ]
+    ]
+]
+
+]