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+" Vim indent file
+" Language: Java
+" Maintainer: Toby Allsopp <toby.allsopp@peace.com>
+" Last Change: 2003 Oct 21
+
+" 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 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()
+
+" Only define the function once.
+if exists("*GetJavaIndent")
+ finish
+endif
+
+function! SkipJavaBlanksAndComments(startline)
+ let lnum = a:startline
+ while lnum > 1
+ let lnum = prevnonblank(lnum)
+ if getline(lnum) =~ '\*/\s*$'
+ while getline(lnum) !~ '/\*' && lnum > 1
+ let lnum = lnum - 1
+ endwhile
+ if getline(lnum) =~ '^\s*/\*'
+ let lnum = lnum - 1
+ else
+ break
+ endif
+ elseif getline(lnum) =~ '^\s*//'
+ let lnum = lnum - 1
+ else
+ break
+ endif
+ endwhile
+ return lnum
+endfunction
+
+function GetJavaIndent()
+
+ " Java is just like C; use the built-in C indenting and then correct a few
+ " specific cases.
+ let theIndent = cindent(v:lnum)
+
+ " If we're in the middle of a comment then just trust cindent
+ if getline(v:lnum) =~ '^\s*\*'
+ return theIndent
+ endif
+
+ " find start of previous line, in case it was a continuation line
+ let lnum = SkipJavaBlanksAndComments(v:lnum - 1)
+ let prev = lnum
+ while prev > 1
+ let next_prev = SkipJavaBlanksAndComments(prev - 1)
+ if getline(next_prev) !~ ',\s*$'
+ 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
+
+" vi: sw=2 et