ltl2tgba.html: Display properties of formulas.

* src/ltlast/formula.hh, src/ltlast/formula.cc (list_formula_props):
New function.
* wrap/python/spot.i: Adjust to wrap list_formula_props.
* wrap/python/ajax/ltl2tgba.html: Add option to display properties.
* wrap/python/ajax/spot.in: Handle ff=p and display properties.
* wrap/python/ajax/protocol.txt: Adjust.

wrap/python/ajax/ltl2tgba.html

@@ -391,6 +391,10 @@ an identifier: <span class="formula">aUb</span> is an atomic proposition, unlike
 		  <INPUT type="radio" name="ff" value="g">
 		  a syntactic tree
 		</label><br>
+		<label class="rtip" title="Various properties of the formula.">
+		  <INPUT type="radio" name="ff" value="p">
+		  property information
+		</label><br>
 	      </div>
 	      <div id="tabs-om">
 		Translate the (simplified) formula as:<br>

wrap/python/ajax/protocol.txt

@@ -24,7 +24,8 @@ Type of formula output if o=f (pick one)
 
   ff=o    Spot syntax
   ff=i    Spin syntax
-  ff=g    graphviz
+  ff=g    graphviz output of the AST
+  ff=p    property dump
 
 Type of automaton if o=a (pick one)
 

wrap/python/ajax/spot.in

@@ -371,7 +371,7 @@ if dored:
 # Formula manipulation only.
 if output_type == 'f':
     formula_format = form.getfirst('ff', 'o')
-    # o = Spot, i = Spin, g = GraphViz
+    # o = Spot, i = Spin, g = GraphViz, p = properties
     if formula_format == 'o':
         unbufprint('<div class="formula spot-format">%s</div>' % f)
     elif formula_format == 'i':
@@ -379,6 +379,30 @@ if output_type == 'f':
                    + spot.to_spin_string(f) + '</div>')
     elif formula_format == 'g':
         render_formula(f)
+    elif formula_format == 'p':
+        unbufprint('Properties for <span class="formula spot-format">%s</span><ul>\n' % f)
+        for p in spot.list_formula_props(f):
+            unbufprint('<li>%s</li>\n' % p)
+
+        # Attempt to refine the hierarchy class using WDBA minimization
+        if not f.is_syntactic_safety() or not f.is_syntactic_guarantee():
+            dict = spot.bdd_dict()
+            automaton = spot.ltl_to_tgba_fm(f, dict, False, True)
+            minimized = spot.minimize_obligation_new(automaton, f)
+            if minimized:
+                g = spot.is_guarantee_automaton(minimized)
+                s = spot.is_safety_mwdba(minimized)
+                if s and not f.is_syntactic_safety():
+                    unbufprint('<li>pathologic safety</li>')
+                if g and not f.is_syntactic_guarantee():
+                    unbufprint('<li>pathologic guarantee</li>')
+                if not f.is_syntactic_obligation():
+                    unbufprint('<li>obligation (although not syntactically)</li>')
+            else:
+                unbufprint('<li>not an obligation</li>')
+            minimized = 0
+            automaton = 0
+        unbufprint('</ul>\n')
     finish()
 
 # Formula translation.