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" Description: Comshare Dimension Definition Language (CDL)
" Maintainer: Raul Segura Acevedo <raulseguraaceved@netscape.net> (Invalid email address)
" Doug Kearns <dougkearns@gmail.com>
" Last Change: 2022 Apr 06
if exists("b:did_indent")
"finish
endif
let b:did_indent = 1
setlocal indentexpr=CdlGetIndent(v:lnum)
setlocal indentkeys&
setlocal indentkeys+==~else,=~endif,=~then,;,),=
let b:undo_indent = "setl inde< indk<"
" Only define the function once.
if exists("*CdlGetIndent")
"finish
endif
" find out if an "...=..." expression is an assignment (or a conditional)
" it scans 'line' first, and then the previous lines
fun! CdlAssignment(lnum, line)
let f = -1
let lnum = a:lnum
let line = a:line
while lnum > 0 && f == -1
" line without members [a] of [b]:[c]...
let inicio = 0
while 1
" keywords that help to decide
let inicio = matchend(line, '\c\<\(expr\|\a*if\|and\|or\|not\|else\|then\|memberis\|\k\+of\)\>\|[<>;]', inicio)
if inicio < 0
break
endif
" it's formula if there's a ';', 'elsE', 'theN', 'enDif' or 'expr'
" conditional if there's a '<', '>', 'elseif', 'if', 'and', 'or', 'not',
" 'memberis', 'childrenof' and other \k\+of functions
let f = line[inicio-1] =~? '[en;]' || strpart(line, inicio-4, 4) =~? 'ndif\|expr'
endw
let lnum = prevnonblank(lnum-1)
let line = substitute(getline(lnum), '\c\(\[[^]]*]\(\s*of\s*\|:\)*\)\+', ' ', 'g')
endw
" if we hit the start of the file then f = -1, return 1 (formula)
return f != 0
endf
fun! CdlGetIndent(lnum)
let thisline = getline(a:lnum)
if match(thisline, '^\s*\(\k\+\|\[[^]]*]\)\s*\(,\|;\s*$\)') >= 0
" it's an attributes line
return shiftwidth()
elseif match(thisline, '^\c\s*\([{}]\|\/[*/]\|dimension\|schedule\|group\|hierarchy\|class\)') >= 0
" it's a header or '{' or '}' or a comment
return 0
end
let lnum = prevnonblank(a:lnum-1)
" Hit the start of the file, use zero indent.
if lnum == 0
return 0
endif
" PREVIOUS LINE
let ind = indent(lnum)
let line = getline(lnum)
" Whether a '=' is a conditional or an assignment. -1 means we don't know
" yet.
" One 'closing' element at the beginning of the line has already reduced the
" indent, but 'else', 'elseif' & 'then' increment it for the next line.
" '=' at the beginning already has the right indent (increased for
" asignments).
let f = -1
let inicio = matchend(line, '^\c\s*\(else\a*\|then\|endif\|/[*/]\|[);={]\)')
if inicio > 0
let c = line[inicio-1]
" ')' and '=' don't change indent and are useless to set 'f'
if c == '{'
return shiftwidth()
elseif c != ')' && c != '='
let f = 1 " all but 'elseif' are followed by a formula
if c ==? 'n' || c ==? 'e' " 'then', 'else'
let ind = ind + shiftwidth()
elseif strpart(line, inicio-6, 6) ==? 'elseif' " elseif, set f to conditional
let ind = ind + shiftwidth()
let f = 0
end
end
end
" remove members [a] of [b]:[c]... (inicio remains valid)
let line = substitute(line, '\c\(\[[^]]*]\(\s*of\s*\|:\)*\)\+', ' ', 'g')
while 1
" search for the next interesting element
let inicio=matchend(line, '\c\<if\|endif\|[()=;]', inicio)
if inicio < 0
break
end
let c = line[inicio-1]
" 'expr(...)' containing the formula
if strpart(line, inicio-5, 5) ==? 'expr('
let ind = 0
let f = 1
elseif c == ')' || c== ';' || strpart(line, inicio-5, 5) ==? 'endif'
let ind = ind - shiftwidth()
elseif c == '(' || c ==? 'f' " '(' or 'if'
let ind = ind + shiftwidth()
else " c == '='
" if it is an assignment increase indent
if f == -1 " we don't know yet, find out
let f = CdlAssignment(lnum, strpart(line, 0, inicio))
end
if f == 1 " formula increase it
let ind = ind + shiftwidth()
end
end
endw
" CURRENT LINE, if it starts with a closing element, decrease indent
" or if it starts with '=' (assignment), increase indent
if match(thisline, '^\c\s*\(else\|then\|endif\|[);]\)') >= 0
let ind = ind - shiftwidth()
elseif match(thisline, '^\s*=') >= 0
if f == -1 " we don't know yet if is an assignment, find out
let f = CdlAssignment(lnum, "")
end
if f == 1 " formula increase it
let ind = ind + shiftwidth()
end
end
return ind
endfun
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