solenv: gdb: adapt ItemSetPrinter to unordered_map

(regression from commit 290c8f6e04)

Change-Id: I85f3dd2a719d13f35cf7246e0787604ddb9f47fe
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/170685
Tested-by: Jenkins
Reviewed-by: Armin Le Grand <Armin.Le.Grand@me.com>
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>

solenv/gdb/libreoffice/svl.py

@@ -33,48 +33,27 @@ class ItemSetPrinter(object):
         return whiches
 
     def children(self):
-        whichranges = self.which_ranges()
-        size = 0
-        whichids = []
-        for (whichfrom, whichto) in whichranges:
-            size += whichto - whichfrom + 1
-            whichids += [which for which in range(whichfrom, whichto+1)]
-        return self._iterator(self.value['m_ppItems'], size, whichids)
+        return self._iterator(self.value['m_aPoolItemMap'])
 
     class _iterator(six.Iterator):
 
-        def __init__(self, data, count, whichids):
-            self.data = data
-            self.whichids = whichids
-            self.count = count
-            self.pos = 0
-            self._check_invariant()
+        def __init__(self, data):
+            self.iter = gdb.default_visualizer(data).children()
 
         def __iter__(self):
             return self
 
         def __next__(self):
-            if self.pos == self.count:
-                raise StopIteration()
+            # unordered_map iter is rather weird?
+            (_, key) = self.iter.__next__()
+            (_, elem) = self.iter.__next__()
 
-            which = self.whichids[self.pos]
-            elem = self.data[self.pos]
-            self.pos = self.pos + 1
-
-            self._check_invariant()
             if (elem == -1):
                 elem = "(Invalid)"
             elif (elem != 0):
                 # let's try how well that works...
                 elem = elem.cast(elem.dynamic_type).dereference()
-            return (str(which), elem)
-
-        def _check_invariant(self):
-            assert self.count >= 0
-            assert self.data
-            assert self.pos >= 0
-            assert self.pos <= self.count
-            assert len(self.whichids) == self.count
+            return ("[" + str(key) + "]", elem)
 
 printer = None