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% Copyright 2005 2015 Ovidiu Gheorghies
% Licensed under the Apache License, Version 2.0.
if known _util_group_mp:
expandafter endinput
fi;
_util_group_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_object;
inputonce util_commons;
inputonce util_margins;
inputonce util_log;
vardef GroupInfo@#(expr pleft, pright, ptop, pbottom)=
attributes(@#);
var(color) borderColor;
var(numeric) boxed;
@#boxed := 0;
@#borderColor := red;
Margins.@#(pleft, pright, ptop, pbottom);
enddef;
vardef GroupInfoCopy@#(text src)=
GroupInfo@#(src.left, src.right, src.top, src.bottom);
@#boxed := src.boxed;
@#borderColor := src.borderColor;
enddef;
GroupInfo.iGroup(2, 2, 2, 2);
GroupInfo.iGroupNoMargins(0, 0, 0, 0);
GroupInfoCopy.iGroupBoxed(iGroup);
iGroupBoxed.boxed := 1;
vardef EGroup@#(text groupInfo)(text objects)=
ObjectEquations(@#);
@#className := "Group";
var(numeric) minx, maxx, miny, maxy;
var(numeric) nObjects;
var(string) objectsAsString;
GroupInfoCopy.@#info(groupInfo);
@#objectsAsString := enumToString(objects)("");
log @#objectsAsString;
@#nObjects := 0;
if @#objectsAsString <> "":
forsuffixes obj = scantokens @#objectsAsString:
@#nObjects := @#nObjects + 1;
endfor;
fi;
enddef;
vardef Group@#(text objects)=
EGroup@#(iGroup)(objects);
enddef;
vardef Group_layout@#=
if @#laidout = 0:
log "Needing layout for group " & (str @#);
@#laidout := 1;
log "Calling layout for objects in group '" & (str @#) & "' .";
log " Objects are: '" & @#objectsAsString & "'.";
if (@#objectsAsString = ""):
log "Empty layout begin";
@#width = @#info.left + @#info.right;
@#height = @#info.top + @#info.bottom;
log "Empty layout end";
else:
log "Layout with content";
layoutObjects(scantokens @#objectsAsString);
log "All objects in group '" & (str @#) & "' are now laid out.";
% As already tested, @#objectsAsString must be <> "".
% See page 53, User's manual for MetaPost
% "if some of the suffixes are empty, the loop gets
% executed, with the loop index parameter set to
% the empty suffix" (!)
log "Group_layout: finding min/max x/y of objects:" & @#objectsAsString;
__objectIndex := 0;
forsuffixes obj__ = scantokens @#objectsAsString:
if __objectIndex = 0:
log "Group_layout: first object " & str obj__ & ", initial minx, maxx, miny, maxy follow.";
@#minx := obj__.left;
@#maxx := obj__.right;
@#miny := obj__.bottom;
@#maxy := obj__.top;
log @#minx;
log @#maxx;
log @#miny;
log @#maxy;
__objectIndex := __objectIndex + 1;
else:
log "Group_layout: current object " & str obj__;
log "comparing minx";
log @#minx;
log obj__.left;
@#minx := min(@#minx, obj__.left);
log "comparing maxx";
log @#maxx;
log obj__.right;
@#maxx := max(@#maxx, obj__.right);
log "comparing miny";
log @#miny;
log obj__.bottom;
@#miny := min(@#miny, obj__.bottom);
log "comparing maxy";
log @#maxy;
log obj__.top;
@#maxy := max(@#maxy, obj__.top);
__objectIndex := __objectIndex + 1;
fi;
endfor;
log "Group_layout: finding min/max x/y: done.";
log @#minx;
log @#maxx;
log @#miny;
log @#maxy;
log "Group_layout: about to set nw, se";
log @#nw;
log @#se;
@#nw = (@#minx - @#info.left, @#maxy + @#info.top);
@#se = (@#maxx + @#info.right, @#miny - @#info.bottom);
log "Done performing actual layout for group " & str @#;
fi;
else:
log "NOT needing layout for group " & (str @#);
fi;
enddef;
vardef Group_draw@#=
log "Drawing group....";
Group_layout@#;
objectEnsurePositioning.@#;
if @#objectsAsString <> "":
drawObjects(scantokens @#objectsAsString);
fi;
if (@#info.boxed = 1):
draw objectBox(@#) withcolor @#info.borderColor;
fi;
enddef;
vardef Group_border@#=
objectBox(@#)
enddef;
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