better edges for texmode=raw & format=tikz

Author: ruifengx

.gitignore

@@ -32,3 +32,4 @@ dist/*
 venv/*
 .idea/*
 
+!*.py

dot2tex/__main__.py

@@ -0,0 +1,4 @@
+from .dot2tex import main
+
+if __name__ == '__main__':
+    main()

dot2tex/base.py

@@ -386,6 +386,7 @@ def do_draw_op(self, drawoperations, drawobj, stat, texlbl_name="texlbl", use_dr
                 text = drawop[5]
                 # head and tail label
                 texmode = self.options.get('texmode', 'verbatim')
+                label = text = drawobj.attr.get('label', '')
                 if drawobj.attr.get('texmode', ''):
                     texmode = drawobj.attr['texmode']
                 if texlbl_name in drawobj.attr:
@@ -398,6 +399,8 @@ def do_draw_op(self, drawoperations, drawobj, stat, texlbl_name="texlbl", use_dr
                 elif texmode == 'math':
                     # math mode
                     text = "$%s$" % text
+                elif label and len(drawoperations) == 1:
+                    text = label
 
                 drawop[5] = text
                 if self.options.get('alignstr', ''):

dot2tex/dot2tex.py

@@ -498,6 +498,3 @@ def convert_graph(dotsource, **kwargs):
     tex = main(True, dotsource, options)
     return tex
 
-
-if __name__ == '__main__':
-    main()