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" Vim indent file
" Language: Java
" Previous Maintainer: Toby Allsopp <toby.allsopp@peace.com>
" Current Maintainer: Hong Xu <xuhdev@gmail.com>
" Last Change: 2012 May 18
" Version: 1.0
" License: Same as Vim.
" Copyright (c) 2012 Hong Xu
" Before 2012, this file is maintained by Toby Allsopp.
" Only load this indent file when no other was loaded.
if exists("b:did_indent")
finish
endif
let b:did_indent = 1
" Indent Java anonymous classes correctly.
setlocal cindent cinoptions& cinoptions+=j1
" The "extends" and "implements" lines start off with the wrong indent.
setlocal indentkeys& indentkeys+=0=extends indentkeys+=0=implements
" Set the function to do the work.
setlocal indentexpr=GetJavaIndent()
let b:undo_indent = "set cin< cino< indentkeys< indentexpr<"
" Only define the function once.
if exists("*GetJavaIndent")
finish
endif
let s:keepcpo= &cpo
set cpo&vim
function! SkipJavaBlanksAndComments(startline)
let lnum = a:startline
while lnum > 1
let lnum = prevnonblank(lnum)
if getline(lnum) =~ '\*/\s*$'
while getline(lnum) !~ '/\*' && lnum > 1
let lnum = lnum - 1
endwhile
if getline(lnum) =~ '^\s*/\*'
let lnum = lnum - 1
else
break
endif
elseif getline(lnum) =~ '^\s*//'
let lnum = lnum - 1
else
break
endif
endwhile
return lnum
endfunction
function GetJavaIndent()
" Java is just like C; use the built-in C indenting and then correct a few
" specific cases.
let theIndent = cindent(v:lnum)
" If we're in the middle of a comment then just trust cindent
if getline(v:lnum) =~ '^\s*\*'
return theIndent
endif
" find start of previous line, in case it was a continuation line
let lnum = SkipJavaBlanksAndComments(v:lnum - 1)
" If the previous line starts with '@', we should have the same indent as
" the previous one
if getline(lnum) =~ '^\s*@\S\+\s*$'
return indent(lnum)
endif
let prev = lnum
while prev > 1
let next_prev = SkipJavaBlanksAndComments(prev - 1)
if getline(next_prev) !~ ',\s*$'
break
endif
let prev = next_prev
endwhile
" Try to align "throws" lines for methods and "extends" and "implements" for
" classes.
if getline(v:lnum) =~ '^\s*\(extends\|implements\)\>'
\ && getline(lnum) !~ '^\s*\(extends\|implements\)\>'
let theIndent = theIndent + &sw
endif
" correct for continuation lines of "throws", "implements" and "extends"
let cont_kw = matchstr(getline(prev),
\ '^\s*\zs\(throws\|implements\|extends\)\>\ze.*,\s*$')
if strlen(cont_kw) > 0
let amount = strlen(cont_kw) + 1
if getline(lnum) !~ ',\s*$'
let theIndent = theIndent - (amount + &sw)
if theIndent < 0
let theIndent = 0
endif
elseif prev == lnum
let theIndent = theIndent + amount
if cont_kw ==# 'throws'
let theIndent = theIndent + &sw
endif
endif
elseif getline(prev) =~ '^\s*\(throws\|implements\|extends\)\>'
\ && (getline(prev) =~ '{\s*$'
\ || getline(v:lnum) =~ '^\s*{\s*$')
let theIndent = theIndent - &sw
endif
" When the line starts with a }, try aligning it with the matching {,
" skipping over "throws", "extends" and "implements" clauses.
if getline(v:lnum) =~ '^\s*}\s*\(//.*\|/\*.*\)\=$'
call cursor(v:lnum, 1)
silent normal %
let lnum = line('.')
if lnum < v:lnum
while lnum > 1
let next_lnum = SkipJavaBlanksAndComments(lnum - 1)
if getline(lnum) !~ '^\s*\(throws\|extends\|implements\)\>'
\ && getline(next_lnum) !~ ',\s*$'
break
endif
let lnum = prevnonblank(next_lnum)
endwhile
return indent(lnum)
endif
endif
" Below a line starting with "}" never indent more. Needed for a method
" below a method with an indented "throws" clause.
let lnum = SkipJavaBlanksAndComments(v:lnum - 1)
if getline(lnum) =~ '^\s*}\s*\(//.*\|/\*.*\)\=$' && indent(lnum) < theIndent
let theIndent = indent(lnum)
endif
return theIndent
endfunction
let &cpo = s:keepcpo
unlet s:keepcpo
" vi: sw=2 et