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% MetaUtil, an easier MetaPost life
% Copyright (C) 2005 Ovidiu Gheorghies
%
% This program is free software; you can redistribute it and/or
% modify it under the terms of the GNU General Public License
% as published by the Free Software Foundation; either version 2
% of the License, or (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program; if not, write to the Free Software
% Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
if known _util_commons_mp:
expandafter endinput
fi;
_util_commons_mp:=1;
% Sadly, this copy of the macro is needed to prevent multiple file loads being shown by MetaPost.
% The guard values (such as _metauml_mp) do ensure that the file isn't loaded multiple times,
% but this macro makes sure that MetaPost won't try to load the file and display a message for that.
def inputonce text libraryFile=
if not known scantokens ("_" & str libraryFile & "_mp"):
%includeonce% show "Loading " & str libraryFile;
scantokens ("input " & str libraryFile);
else:
%includeonce% show str libraryFile & " already loaded.";
fi;
enddef;
inputonce util_log;
vardef lmax(text items)=
log "finding lmax of items " & str items;
save current, nItems;
numeric current, nItems;
nItems := 0;
current:= 0;
for item = items:
log nItems;
log item;
if nItems = 0:
current := item;
else:
current := max(current)(item);
fi;
nItems := nItems + 1;
endfor;
current
enddef;
vardef lmin(text items)=
save current, nItems;
numeric current, nItems;
nItems := 0;
current:= 0;
for item = items:
if nItems = 0:
current := item;
else:
current := min(current)(item);
fi;
nItems := nItems + 1;
endfor;
current
enddef;
def max(text a)(text b)=
if (a > b): a%
else:b%
fi;
enddef;
def min(text a)(text b)=
if (a < b): a%
else:b%
fi;
enddef;
vardef ensurePict(text pictOrText)(expr font, scale) =
save p; picture p;
if picture pictOrText: p=pictOrText
else: p = pictOrText infont font scaled scale
fi;
p
enddef;
def pictHeight(text obj) =
(ypart (urcorner obj) - ypart (llcorner obj))
enddef;
def pictWidth(text obj) =
(xpart (urcorner obj) - xpart (llcorner obj))
enddef;
vardef listArray(text array)(text nElements)=
save objEnum;
string objEnum;
objEnum := "";
for i = 0 upto nElements-1:
if i>0:
objEnum := objEnum & ", ";
fi;
objEnum := objEnum & (str array) & (decimal i);
endfor;
objEnum
enddef;
vardef enumToString(text enumeration)(expr prefix)=
save ret, firstVar;
string ret;
ret := "";
numeric firstVar;
firstVar := 1;
forsuffixes v = enumeration:
if firstVar = 0:
ret := ret & ",";
else:
firstVar := 0;
fi;
ret := ret & prefix & (str v);
endfor;
ret
enddef;
def _dx(text pA)(text pB) =
(xpart(pB)-xpart(pA))
enddef;
def _dy(text pA, pB) =
(ypart(pB)-ypart(pA))
enddef;
def _length(text pA)(text pB) =
sqrt (_dx(pA)(pB)*_dx(pA)(pB) + _dy(pA)(pB)*_dy(pA)(pB))
enddef;
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