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-rw-r--r--runtime/indent/cdl.vim136
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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! CdlAsignment(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 remainds 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 = CdlAsignment(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 = CdlAsignment(lnum, "")
+ end
+ if f == 1 " formula increase it
+ let ind = ind + shiftwidth()
+ end
+ end
+
+ return ind
+endfun