Mercurial > MadButterfly
diff pyink/domview.py @ 1340:10d5f06f7566
Fix issue of shouting error when removing a node.
- It shout a Python traceback message when removing a node that is
referenced by a svg:use node.
- when the node been removed, the node would be duplicated. The
duplication was used to replace the svg:use one.
- The ID of inserted duplication is the same as duplicated node,
and modified to a new and unique ID.
- Original design of domview_monitor can not handle it.
- It is resolved by changing domview_monitor._id2node from single
mapping to multiple mapping one.
| author | Thinker K.F. Li <thinker@codemud.net> |
|---|---|
| date | Sun, 06 Feb 2011 23:12:48 +0800 |
| parents | 0b5ee9c90af7 |
| children | 972d749b9656 |
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--- a/pyink/domview.py Sun Feb 06 22:57:33 2011 +0800 +++ b/pyink/domview.py Sun Feb 06 23:12:48 2011 +0800 @@ -628,6 +628,43 @@ self._on_attr_modified, None) pass + ## \brief Add a node to id2node mapping. + # + # domview_monitor._id2node is a multiple mapping to map a key to + # multiple node. The reason that it is not a single mapping is + # Inkscape would insert a node with the ID from the node been + # copied, and change its ID to a unique one later. So, we must + # provide the capability to handle two or more nodes with the same + # ID. + def _map_id2node(self, node, node_id): + if node_id in self._id2node: + old_value = self._id2node[node_id] + if isinstance(old_value, list): + old_value.append(node) + else: + self._id2node[node_id] = [old_value, node] + pass + else: + self._id2node[node_id] = node + pass + pass + + def _unmap_id2node(self, node, node_id): + if node_id not in self._id2node: + raise ValueError, 'invalide node ID (%s)' % (node_id) + + value = self._id2node[node_id] + if isinstance(value, list): + value.remove(node) + if not value: + del self._id2node[node_id] + pass + pass + else: + del self._id2node[node_id] + pass + pass + ## \brief Rescan the tree. # def _monitor_reparse(self): @@ -649,9 +686,7 @@ except: pass else: - if child_id not in self._id2node: - self._id2node[child_id] = child - pass + self._map_id2node(child, child_id) pass if child.name() == 'ns0:scene' and _id_eq(node, self._scenes_node): @@ -707,10 +742,7 @@ except: pass else: - if child_id not in self._id2node: - raise ValueError, \ - 'remove a node that is never known (%s)' % (child_id) - del self._id2node[child_id] + self._unmap_id2node(child, child_id) pass if child.name() == 'ns0:scene' and _id_eq(node, self._scenes_node): @@ -737,20 +769,11 @@ return if name == 'id': - if old_value and (old_value not in self._id2node): - raise ValueError, \ - 'old ID value of passed node is invalid one (%s)' % \ - (old_value) - if (new_value in self._id2node): - raise ValueError, \ - 'new ID value of passed node is invalid one (%s)' % \ - (new_value) - - if old_value: - del self._id2node[old_value] + if old_value and old_value in self._id2node: + self._unmap_id2node(node, old_value) pass if new_value: - self._id2node[new_value] = node + self._map_id2node(node, new_value) pass pass elif name == 'ref' and node.name() == 'ns0:scene': @@ -872,7 +895,10 @@ ## \brief Return the node with given ID. # def get_node(self, node_id): - return self._id2node[node_id] + value = self._id2node[node_id] + if isinstance(value, list): + return value[-1] + return value ## \brief Return a scene node corresponding to a scene group of given ID. #