Mercurial > MadButterfly
view pyink/consistency.py @ 1307:cfbc0f3e54e3
Add supporting for programmer defined prefix for data_monitor
author | Thinker K.F. Li <thinker@codemud.net> |
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date | Thu, 20 Jan 2011 00:34:08 +0800 |
parents | e12472f8eef3 |
children | 194c7a831083 |
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import dom_event from data_monitor import data_monitor import traceback ## \brief Check consistency of a DOM-tree associated with a domview_ui. # # This is a co-worker of \ref domview_ui to check DOM-tree and make # sure consistency of scenes, scene groups in the DOM-tree. It also # updates layer list of \ref domview_ui to reflect last changes of the # DOM-tree. # # Since it is a consistency checker, it must well understanding # structure that expected by domview_ui. So, this class is highly # closed to the internal of \ref domview_ui. It is separated from # domview_ui for collecting related logic and functions in a place to # set up a clear boundary from the functions provided by \ref # domview_ui. # # This class is expected to access private variables of \ref # domview_ui. But, use public interface of domview_ui if possible. # # This class is also monitored by \ref data_monitor to monitor the # accessing to domview_ui. # class consistency_checker(object): __metaclass__ = data_monitor def __init__(self, domview_ui): self._domviewui = domview_ui self._locker = self._domviewui self._doc = None self._root = None pass def _start_check(self): doc = self._doc dom_event.addEventListener(doc, 'DOMNodeInserted', self.do_insert_node, None) dom_event.addEventListener(doc, 'DOMNodeRemoved', self.do_remove_node, None) dom_event.addEventListener(doc, 'DOMAttrModified', self.do_attr_modified, None) pass ## \brief Handle a new document. # # This method is called by domview_ui.handle_doc_root(). # def handle_doc_root(self, doc, root): self._doc = doc self._root = root self._start_check() pass def _insert_node_recursive(self, node, child): child_name = child.name() if child_name == 'ns0:scene': scene_group_id = child.getAttribute('ref') try: scene_group = self._domviewui.get_node(scene_group_id) except KeyError: # can not find associated scene group. pass else: self._domviewui.manage_scene_node(child, scene_group) pass elif child_name == 'svg:g': if node.name() == 'svg:svg': self._domviewui.manage_layer_group(child) pass pass for cchild in child.childList(): self._remove_node_recursive(child, cchild) pass pass def _remove_node_recursive(self, node, child): return for cchild in child.childList(): self._remove_node_recursive(child, cchild) pass child_name = child.name() if child_name not in ('ns0:scene', 'svg:g'): return # # Remove the key frame assocated with a removed scene node or # scene group if we can find the key frame. # if child_name == 'ns0:scene': try: group_id = child.getAttribute('ref') except: return elif child_name == 'svg:g': try: group_id = child.getAttribute('id') except: return pass try: layer_idx, (start, end, tween_type) = \ self._domviewui.find_key_from_group(group_id) except ValueError: pass else: # We have found the key frame. self._domviewui.unmark_key(layer_idx, start) return # # Remove layers # if child_name == 'svg:g': try: layer_idx = self._domviewui.find_layer_from_group(group_id) except ValueError: pass else: # It is a layer group self._domviewui.rm_layer(layer_idx) pass pass pass def do_insert_node(self, node, child): self._insert_node_recursive(node, child) pass def do_remove_node(self, node, child): self._remove_node_recursive(node, child) pass def do_attr_modified(self, node, name, old_value, new_value): if node.name() == 'ns0:scene': if name == 'ref': try: if new_value: raise ValueError('The new_value is not empty') self._domviewui.reset() except: traceback.print_exc() pass pass elif name == 'end' or name == 'start': self._domviewui.reset() pass elif name == 'type': self._domviewui.reset() pass pass pass pass