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kakoune/rc/base/java.kak

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hook global BufCreate .*\.java %{
set buffer filetype java
}
add-highlighter shared/ regions -default code java \
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string %{(?<!')"} %{(?<!\\)(\\\\)*"} '' \
comment /\* \*/ '' \
comment // $ ''
add-highlighter shared/java/string fill string
add-highlighter shared/java/comment fill comment
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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|instanceof)\b" 0:keyword
add-highlighter shared/java/code regex "\b(final|public|protected|private|abstract|synchronized|native|transient|volatile)\b" 0:attribute
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# Commands
# ‾‾‾‾‾‾‾‾
def -hidden java-indent-on-new-line %~
eval -draft -itersel %=
# preserve previous line indent
try %{ exec -draft \;K<a-&> }
# indent after lines ending with { or (
try %[ exec -draft k<a-x> <a-k> [{(]\h*$ <ret> j<a-gt> ]
# cleanup trailing white spaces on the previous line
try %{ exec -draft k<a-x> s \h+$ <ret>d }
# align to opening paren of previous line
try %{ exec -draft [( <a-k> \A\([^\n]+\n[^\n]*\n?\z <ret> s \A\(\h*.|.\z <ret> '<a-;>' & }
# copy // comments prefix
try %{ exec -draft \;<c-s>k<a-x> s ^\h*\K/{2,} <ret> y<c-o><c-o>P<esc> }
# indent after a switch's case/default statements
try %[ exec -draft k<a-x> <a-k> ^\h*(case|default).*:$ <ret> j<a-gt> ]
# indent after keywords
try %[ exec -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> ]
=
~
def -hidden java-indent-on-opening-curly-brace %[
# align indent with opening paren when { is entered on a new line after the closing paren
try %[ exec -draft -itersel h<a-F>)M <a-k> \A\(.*\)\h*\n\h*\{\z <ret> s \A|.\z <ret> 1<a-&> ]
]
def -hidden java-indent-on-closing-curly-brace %[
# align to opening curly brace when alone on a line
try %[ exec -itersel -draft <a-h><a-k>^\h+\}$<ret>hms\A|.\z<ret>1<a-&> ]
]
# Initialization
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
hook global WinSetOption filetype=java %{
# cleanup trailing whitespaces when exiting insert mode
hook window InsertEnd .* -group java-hooks %{ try %{ exec -draft <a-x>s^\h+$<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 global WinSetOption filetype=(?!java).* %{
remove-hooks window java-hooks
remove-hooks window java-indent
}
hook -group java-highlight global WinSetOption filetype=java %{ add-highlighter window ref java }
hook -group java-highlight global WinSetOption filetype=(?!java).* %{ remove-highlighter window/java }