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-rw-r--r--runtime/indent/idlang.vim63
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+" IDL (Interactive Data Language) indent file.
+" Language: IDL (ft=idlang)
+" Last change: 2002 Sep 23
+" Maintainer: Aleksandar Jelenak <ajelenak AT yahoo.com>
+
+" Only load this indent file when no other was loaded.
+if exists("b:did_indent")
+ finish
+endif
+let b:did_indent = 1
+
+setlocal indentkeys=o,O,0=endif,0=ENDIF,0=endelse,0=ENDELSE,0=endwhile,
+ \0=ENDWHILE,0=endfor,0=ENDFOR,0=endrep,0=ENDREP
+
+setlocal indentexpr=GetIdlangIndent(v:lnum)
+
+" Only define the function once.
+if exists("*GetIdlangIndent")
+ finish
+endif
+
+function GetIdlangIndent(lnum)
+ " First non-empty line above the current line.
+ let pnum = prevnonblank(v:lnum-1)
+ " v:lnum is the first non-empty line -- zero indent.
+ if pnum == 0
+ return 0
+ endif
+ " Second non-empty line above the current line.
+ let pnum2 = prevnonblank(pnum-1)
+
+ " Current indent.
+ let curind = indent(pnum)
+
+ " Indenting of continued lines.
+ if getline(pnum) =~ '\$\s*\(;.*\)\=$'
+ if getline(pnum2) !~ '\$\s*\(;.*\)\=$'
+ let curind = curind+&sw
+ endif
+ else
+ if getline(pnum2) =~ '\$\s*\(;.*\)\=$'
+ let curind = curind-&sw
+ endif
+ endif
+
+ " Indenting blocks of statements.
+ if getline(v:lnum) =~? '^\s*\(endif\|endelse\|endwhile\|endfor\|endrep\)\>'
+ if getline(pnum) =~? 'begin\>'
+ elseif indent(v:lnum) > curind-&sw
+ let curind = curind-&sw
+ else
+ return -1
+ endif
+ elseif getline(pnum) =~? 'begin\>'
+ if indent(v:lnum) < curind+&sw
+ let curind = curind+&sw
+ else
+ return -1
+ endif
+ endif
+ return curind
+endfunction
+