1 files changed, 65 insertions, 0 deletions
diff --git a/rc/filetype/java.kak b/rc/filetype/java.kak
new file mode 100644
index 00000000..7caa5aee
--- /dev/null
+++ b/rc/filetype/java.kak
@@ -0,0 +1,65 @@
+hook global BufCreate .*\.java %{
+    set-option buffer filetype java
+}
+
+add-highlighter shared/java regions
+add-highlighter shared/java/code default-region group
+add-highlighter shared/java/string region %{(?<!')"} %{(?<!\\)(\\\\)*"} fill string
+add-highlighter shared/java/comment region /\* \*/ fill comment
+add-highlighter shared/java/line_comment region // $ fill comment
+
+add-highlighter shared/java/code/ regex %{\b(this|true|false|null)\b} 0:value
+add-highlighter shared/java/code/ regex "\b(void|int|char|unsigned|float|boolean|double)\b" 0:type
+add-highlighter shared/java/code/ regex "\b(while|for|if|else|do|static|switch|case|default|class|interface|enum|goto|break|continue|return|import|try|catch|throw|new|package|extends|implements|throws|instanceof)\b" 0:keyword
+add-highlighter shared/java/code/ regex "\b(final|public|protected|private|abstract|synchronized|native|transient|volatile)\b" 0:attribute
+add-highlighter shared/java/code/ regex "(?<!\w)@\w+\b" 0:meta
+
+# Commands
+# ‾‾‾‾‾‾‾‾
+
+define-command -hidden java-indent-on-new-line %~
+    evaluate-commands -draft -itersel %=
+        # preserve previous line indent
+        try %{ execute-keys -draft \;K<a-&> }
+        # indent after lines ending with { or (
+        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 }
+        # align to opening paren of previous line
+        try %{ execute-keys -draft [( <a-k> \A\([^\n]+\n[^\n]*\n?\z <ret> s \A\(\h*.|.\z <ret> '<a-;>' & }
+        # copy // comments prefix
+        try %{ execute-keys -draft \;<c-s>k<a-x> s ^\h*\K/{2,} <ret> y<c-o>P<esc> }
+        # indent after a switch's case/default statements
+        try %[ execute-keys -draft k<a-x> <a-k> ^\h*(case|default).*:$ <ret> j<a-gt> ]
+        # indent after keywords
+        try %[ execute-keys -draft \;<a-F>)MB <a-k> \A(if|else|while|for|try|catch)\h*\(.*\)\h*\n\h*\n?\z <ret> s \A|.\z <ret> 1<a-&>1<a-space><a-gt> ]
+    =
+~
+
+define-command -hidden java-indent-on-opening-curly-brace %[
+    # align indent with opening paren when { is entered on a new line after the closing paren
+    try %[ execute-keys -draft -itersel h<a-F>)M <a-k> \A\(.*\)\h*\n\h*\{\z <ret> s \A|.\z <ret> 1<a-&> ]
+]
+
+define-command -hidden java-indent-on-closing-curly-brace %[
+    # align to opening curly brace when alone on a line
+    try %[ execute-keys -itersel -draft <a-h><a-k>^\h+\}$<ret>hms\A|.\z<ret>1<a-&> ]
+]
+
+# Initialization
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+hook -group java-highlight global WinSetOption filetype=java %{
+    add-highlighter window/java ref java
+    hook -once -always window WinSetOption filetype=.* %{ remove-highlighter window/java }
+}
+
+hook global WinSetOption filetype=java %{
+    # cleanup trailing whitespaces when exiting insert mode
+    hook window ModeChange insert:.* -group java-trim-indent %{ try %{ execute-keys -draft <a-x>s^\h+$<ret>d } }
+    hook window InsertChar \n -group java-indent java-indent-on-new-line
+    hook window InsertChar \{ -group java-indent java-indent-on-opening-curly-brace
+    hook window InsertChar \} -group java-indent java-indent-on-closing-curly-brace
+
+    hook -once -always window WinSetOption filetype=.* %{ remove-hooks window java-.+ }
+}