def GetDependencyGraph(protocols):
"""Determine the dependencies between interfaces and their messages.
Args:
protocols: the list of wayland xml protocols you want the dependencies of.
Returns:
A bipartite graph where messages (i, m) depend on interfaces (i) and
vice-versa. An edge from (i,m) to (i') indicates an i' instance is needed to
invoke m, whereas (i) to (i',m') indicates m' is a constructor for i
instances.
"""
dep_graph = {}
constructed_interfaces = set()
for _, i, m in wlu.AllMessages(protocols):
dep_graph[ToNode(i, m)] = [('receiver', i.attrib['name'])] + [
(a.attrib['name'], a.get('interface', '?'))
for a in m.findall('arg') if a.attrib['type'] == 'object'
]
constructed = wlu.GetConstructedInterface(m)
if constructed:
constructed_interfaces.add(constructed)
dep_graph[constructed] = ToNode(i, m)
for _, i in wlu.AllInterfaces(protocols):
if i.attrib['name'] not in constructed_interfaces:
dep_graph[i.attrib['name']] = ('wl_registry', 'bind')
return dep_graph
def __init__(self, protocols):
self.non_global_names = {
wlu.GetConstructedInterface(m)
for _, _, m in wlu.AllMessages(protocols)
} - {None}
self.interfaces_with_listeners = {
i.attrib['name']
for p, i in wlu.AllInterfaces(protocols) if wlu.NeedsListener(i)
}
self.counts = {}
def GetMessage(message, context):
name = message.attrib['name']
constructed = wlu.GetConstructedInterface(message)
return {
'name': name,
'tag': message.tag,
'idx': context.GetAndIncrementCount('message_index'),
'args': [GetArg(a) for a in message.findall('arg')],
'is_constructor': wlu.IsConstructor(message),
'is_destructor': wlu.IsDestructor(message),
'constructed': constructed,
'constructed_has_listener': constructed
in context.interfaces_with_listeners,
'doc': wlu.GetDocumentation(message),
}