898 lines
40 KiB
Python
898 lines
40 KiB
Python
# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this file,
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# You can obtain one at http://mozilla.org/MPL/2.0/.
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from WebIDL import IDLInterface, IDLExternalInterface, IDLImplementsStatement
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import os
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from collections import defaultdict
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autogenerated_comment = "/* THIS FILE IS AUTOGENERATED - DO NOT EDIT */\n"
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class Configuration:
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"""
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Represents global configuration state based on IDL parse data and
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the configuration file.
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"""
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def __init__(self, filename, parseData, generatedEvents=[]):
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# Read the configuration file.
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glbl = {}
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execfile(filename, glbl)
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config = glbl['DOMInterfaces']
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# Build descriptors for all the interfaces we have in the parse data.
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# This allows callers to specify a subset of interfaces by filtering
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# |parseData|.
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self.descriptors = []
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self.interfaces = {}
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self.descriptorsByName = {}
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self.optimizedOutDescriptorNames = set()
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self.generatedEvents = generatedEvents
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self.maxProtoChainLength = 0
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for thing in parseData:
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if isinstance(thing, IDLImplementsStatement):
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# Our build system doesn't support dep build involving
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# addition/removal of "implements" statements that appear in a
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# different .webidl file than their LHS interface. Make sure we
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# don't have any of those.
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#
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# But whitelist a RHS that is LegacyQueryInterface,
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# since people shouldn't be adding any of those.
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if (thing.implementor.filename() != thing.filename() and
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thing.implementee.identifier.name != "LegacyQueryInterface"):
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raise TypeError(
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"The binding build system doesn't really support "
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"'implements' statements which don't appear in the "
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"file in which the left-hand side of the statement is "
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"defined. Don't do this unless your right-hand side "
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"is LegacyQueryInterface.\n"
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"%s\n"
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"%s" %
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(thing.location, thing.implementor.location))
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assert not thing.isType()
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if not thing.isInterface():
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continue
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iface = thing
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self.interfaces[iface.identifier.name] = iface
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if iface.identifier.name not in config:
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# Completely skip consequential interfaces with no descriptor
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# if they have no interface object because chances are we
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# don't need to do anything interesting with them.
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if iface.isConsequential() and not iface.hasInterfaceObject():
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self.optimizedOutDescriptorNames.add(iface.identifier.name)
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continue
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entry = {}
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else:
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entry = config[iface.identifier.name]
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if not isinstance(entry, list):
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assert isinstance(entry, dict)
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entry = [entry]
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elif len(entry) == 1:
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if entry[0].get("workers", False):
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# List with only a workers descriptor means we should
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# infer a mainthread descriptor. If you want only
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# workers bindings, don't use a list here.
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entry.append({})
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else:
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raise TypeError("Don't use a single-element list for "
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"non-worker-only interface " + iface.identifier.name +
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" in Bindings.conf")
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elif len(entry) == 2:
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if entry[0].get("workers", False) == entry[1].get("workers", False):
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raise TypeError("The two entries for interface " + iface.identifier.name +
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" in Bindings.conf should not have the same value for 'workers'")
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else:
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raise TypeError("Interface " + iface.identifier.name +
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" should have no more than two entries in Bindings.conf")
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descs = [Descriptor(self, iface, x) for x in entry]
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self.descriptors.extend(descs)
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# Setting up descriptorsByName while iterating through interfaces
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# means we can get the nativeType of iterable interfaces without
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# having to do multiple loops.
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for d in descs:
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self.descriptorsByName.setdefault(d.interface.identifier.name,
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[]).append(d)
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# Keep the descriptor list sorted for determinism.
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self.descriptors.sort(lambda x, y: cmp(x.name, y.name))
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self.descriptorsByFile = {}
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for d in self.descriptors:
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self.descriptorsByFile.setdefault(d.interface.filename(),
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[]).append(d)
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self.enums = [e for e in parseData if e.isEnum()]
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# Figure out what our main-thread and worker dictionaries and callbacks
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# are.
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mainTypes = set()
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for descriptor in ([self.getDescriptor("DummyInterface", workers=False)] +
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self.getDescriptors(workers=False, isExternal=False, skipGen=False)):
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mainTypes |= set(getFlatTypes(getTypesFromDescriptor(descriptor)))
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(mainCallbacks, mainDictionaries) = findCallbacksAndDictionaries(mainTypes)
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workerTypes = set()
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for descriptor in ([self.getDescriptor("DummyInterfaceWorkers", workers=True)] +
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self.getDescriptors(workers=True, isExternal=False, skipGen=False)):
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workerTypes |= set(getFlatTypes(getTypesFromDescriptor(descriptor)))
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(workerCallbacks, workerDictionaries) = findCallbacksAndDictionaries(workerTypes)
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self.dictionaries = [d for d in parseData if d.isDictionary()]
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self.callbacks = [c for c in parseData if
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c.isCallback() and not c.isInterface()]
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# Dictionary mapping from a union type name to a set of filenames where
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# union types with that name are used.
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self.filenamesPerUnion = defaultdict(set)
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# Dictionary mapping from a filename to a list of tuples containing a
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# type and descriptor for the union types used in that file. If a union
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# type is used in multiple files then it will be added to the list
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# for the None key. Note that the list contains a tuple for every use of
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# a union type, so there can be multiple tuples with union types that
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# have the same name.
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self.unionsPerFilename = defaultdict(list)
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for (t, descriptor, _) in getAllTypes(self.descriptors, self.dictionaries, self.callbacks):
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while True:
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if t.isMozMap():
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t = t.inner
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elif t.unroll() != t:
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t = t.unroll()
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elif t.isPromise():
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t = t.promiseInnerType()
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else:
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break
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if t.isUnion():
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filenamesForUnion = self.filenamesPerUnion[t.name]
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if t.filename() not in filenamesForUnion:
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if len(filenamesForUnion) == 0:
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# This is the first file that we found a union with this
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# name in, record the union as part of the file.
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uniqueFilenameForUnion = t.filename()
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else:
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# We already found a file that contains a union with
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# this name.
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if len(filenamesForUnion) == 1:
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# This is the first time we found a union with this
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# name in another file.
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for f in filenamesForUnion:
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# Filter out unions with this name from the
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# unions for the file where we previously found
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# them.
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unionsForFilename = self.unionsPerFilename[f]
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unionsForFilename = filter(lambda u: u[0].name != t.name,
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unionsForFilename)
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if len(unionsForFilename) == 0:
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del self.unionsPerFilename[f]
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else:
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self.unionsPerFilename[f] = unionsForFilename
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# Unions with this name appear in multiple files, record
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# the filename as None, so that we can detect that.
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uniqueFilenameForUnion = None
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self.unionsPerFilename[uniqueFilenameForUnion].append((t, descriptor))
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filenamesForUnion.add(t.filename())
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def flagWorkerOrMainThread(items, main, worker):
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for item in items:
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if item in main:
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item.setUserData("mainThread", True)
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if item in worker:
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item.setUserData("workers", True)
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flagWorkerOrMainThread(self.callbacks, mainCallbacks, workerCallbacks)
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def getInterface(self, ifname):
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return self.interfaces[ifname]
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def getDescriptors(self, **filters):
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"""Gets the descriptors that match the given filters."""
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curr = self.descriptors
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# Collect up our filters, because we may have a webIDLFile filter that
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# we always want to apply first.
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tofilter = []
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for key, val in filters.iteritems():
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if key == 'webIDLFile':
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# Special-case this part to make it fast, since most of our
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# getDescriptors calls are conditioned on a webIDLFile. We may
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# not have this key, in which case we have no descriptors
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# either.
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curr = self.descriptorsByFile.get(val, [])
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continue
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elif key == 'hasInterfaceObject':
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getter = lambda x: (not x.interface.isExternal() and
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x.interface.hasInterfaceObject())
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elif key == 'hasInterfacePrototypeObject':
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getter = lambda x: (not x.interface.isExternal() and
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x.interface.hasInterfacePrototypeObject())
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elif key == 'hasInterfaceOrInterfacePrototypeObject':
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getter = lambda x: x.hasInterfaceOrInterfacePrototypeObject()
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elif key == 'isCallback':
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getter = lambda x: x.interface.isCallback()
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elif key == 'isExternal':
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getter = lambda x: x.interface.isExternal()
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elif key == 'isJSImplemented':
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getter = lambda x: x.interface.isJSImplemented()
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elif key == 'isNavigatorProperty':
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getter = lambda x: x.interface.getNavigatorProperty() is not None
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elif key == 'isExposedInAnyWorker':
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getter = lambda x: x.interface.isExposedInAnyWorker()
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elif key == 'isExposedInSystemGlobals':
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getter = lambda x: x.interface.isExposedInSystemGlobals()
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elif key == 'isExposedInWindow':
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getter = lambda x: x.interface.isExposedInWindow()
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else:
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# Have to watch out: just closing over "key" is not enough,
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# since we're about to mutate its value
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getter = (lambda attrName: lambda x: getattr(x, attrName))(key)
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tofilter.append((getter, val))
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for f in tofilter:
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curr = filter(lambda x: f[0](x) == f[1], curr)
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return curr
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def getEnums(self, webIDLFile):
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return filter(lambda e: e.filename() == webIDLFile, self.enums)
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@staticmethod
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def _filterForFileAndWorkers(items, filters):
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"""Gets the items that match the given filters."""
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for key, val in filters.iteritems():
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if key == 'webIDLFile':
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items = filter(lambda x: x.filename() == val, items)
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elif key == 'workers':
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if val:
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items = filter(lambda x: x.getUserData("workers", False), items)
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else:
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items = filter(lambda x: x.getUserData("mainThread", False), items)
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else:
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assert(0) # Unknown key
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return items
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def getDictionaries(self, **filters):
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return self._filterForFileAndWorkers(self.dictionaries, filters)
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def getCallbacks(self, **filters):
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return self._filterForFileAndWorkers(self.callbacks, filters)
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def getDescriptor(self, interfaceName, workers):
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"""
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Gets the appropriate descriptor for the given interface name
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and the given workers boolean.
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"""
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# We may have optimized out this descriptor, but the chances of anyone
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# asking about it are then slim. Put the check for that _after_ we've
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# done our normal lookups. But that means we have to do our normal
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# lookups in a way that will not throw if they fail.
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for d in self.descriptorsByName.get(interfaceName, []):
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if d.workers == workers:
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return d
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if workers:
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for d in self.descriptorsByName.get(interfaceName, []):
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return d
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if interfaceName in self.optimizedOutDescriptorNames:
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raise NoSuchDescriptorError(
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"No descriptor for '%s', which is a mixin ([NoInterfaceObject] "
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"and a consequential interface) without an explicit "
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"Bindings.conf annotation." % interfaceName)
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raise NoSuchDescriptorError("For " + interfaceName + " found no matches")
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def getDescriptorProvider(self, workers):
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"""
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Gets a descriptor provider that can provide descriptors as needed,
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for the given workers boolean
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"""
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return DescriptorProvider(self, workers)
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class NoSuchDescriptorError(TypeError):
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def __init__(self, str):
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TypeError.__init__(self, str)
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class DescriptorProvider:
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"""
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A way of getting descriptors for interface names
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"""
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def __init__(self, config, workers):
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self.config = config
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self.workers = workers
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def getDescriptor(self, interfaceName):
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"""
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Gets the appropriate descriptor for the given interface name given the
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context of the current descriptor. This selects the appropriate
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implementation for cases like workers.
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"""
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return self.config.getDescriptor(interfaceName, self.workers)
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def methodReturnsJSObject(method):
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assert method.isMethod()
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if method.returnsPromise():
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return True
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for signature in method.signatures():
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returnType = signature[0]
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if returnType.isObject() or returnType.isSpiderMonkeyInterface():
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return True
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return False
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def MemberIsUnforgeable(member, descriptor):
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# Note: "or" and "and" return either their LHS or RHS, not
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# necessarily booleans. Make sure to return a boolean from this
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# method, because callers will compare its return value to
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# booleans.
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return bool((member.isAttr() or member.isMethod()) and
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not member.isStatic() and
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(member.isUnforgeable() or
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descriptor.interface.getExtendedAttribute("Unforgeable")))
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class Descriptor(DescriptorProvider):
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"""
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Represents a single descriptor for an interface. See Bindings.conf.
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"""
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def __init__(self, config, interface, desc):
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DescriptorProvider.__init__(self, config, desc.get('workers', False))
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self.interface = interface
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if self.workers:
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assert 'wantsXrays' not in desc
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self.wantsXrays = False
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else:
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self.wantsXrays = desc.get('wantsXrays', True)
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# Read the desc, and fill in the relevant defaults.
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ifaceName = self.interface.identifier.name
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# For generated iterator interfaces for other iterable interfaces, we
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# just use IterableIterator as the native type, templated on the
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# nativeType of the iterable interface. That way we can have a
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# templated implementation for all the duplicated iterator
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# functionality.
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if self.interface.isIteratorInterface():
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itrName = self.interface.iterableInterface.identifier.name
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itrDesc = self.getDescriptor(itrName)
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nativeTypeDefault = iteratorNativeType(itrDesc)
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elif self.interface.isExternal():
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assert not self.workers
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nativeTypeDefault = "nsIDOM" + ifaceName
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elif self.interface.isCallback():
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nativeTypeDefault = "mozilla::dom::" + ifaceName
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else:
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if self.workers:
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nativeTypeDefault = "mozilla::dom::workers::" + ifaceName
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else:
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nativeTypeDefault = "mozilla::dom::" + ifaceName
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self.nativeType = desc.get('nativeType', nativeTypeDefault)
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# Now create a version of nativeType that doesn't have extra
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# mozilla::dom:: at the beginning.
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prettyNativeType = self.nativeType.split("::")
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if prettyNativeType[0] == "mozilla":
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prettyNativeType.pop(0)
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if prettyNativeType[0] == "dom":
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prettyNativeType.pop(0)
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self.prettyNativeType = "::".join(prettyNativeType)
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self.jsImplParent = desc.get('jsImplParent', self.nativeType)
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# Do something sane for JSObject
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if self.nativeType == "JSObject":
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headerDefault = "js/TypeDecls.h"
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elif self.interface.isCallback() or self.interface.isJSImplemented():
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# A copy of CGHeaders.getDeclarationFilename; we can't
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# import it here, sadly.
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# Use our local version of the header, not the exported one, so that
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# test bindings, which don't export, will work correctly.
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basename = os.path.basename(self.interface.filename())
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headerDefault = basename.replace('.webidl', 'Binding.h')
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else:
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if self.workers:
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headerDefault = "mozilla/dom/workers/bindings/%s.h" % ifaceName
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elif not self.interface.isExternal() and self.interface.getExtendedAttribute("HeaderFile"):
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headerDefault = self.interface.getExtendedAttribute("HeaderFile")[0]
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elif self.interface.isIteratorInterface():
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headerDefault = "mozilla/dom/IterableIterator.h"
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else:
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headerDefault = self.nativeType
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headerDefault = headerDefault.replace("::", "/") + ".h"
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self.headerFile = desc.get('headerFile', headerDefault)
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self.headerIsDefault = self.headerFile == headerDefault
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if self.jsImplParent == self.nativeType:
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self.jsImplParentHeader = self.headerFile
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else:
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self.jsImplParentHeader = self.jsImplParent.replace("::", "/") + ".h"
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self.skipGen = desc.get('skipGen', False)
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self.notflattened = desc.get('notflattened', False)
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self.register = desc.get('register', True)
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self.hasXPConnectImpls = desc.get('hasXPConnectImpls', False)
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# If we're concrete, we need to crawl our ancestor interfaces and mark
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# them as having a concrete descendant.
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self.concrete = (not self.interface.isExternal() and
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not self.interface.isCallback() and
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desc.get('concrete', True))
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self.hasUnforgeableMembers = (self.concrete and
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any(MemberIsUnforgeable(m, self) for m in
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self.interface.members))
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self.operations = {
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'IndexedGetter': None,
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'IndexedSetter': None,
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'IndexedCreator': None,
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'IndexedDeleter': None,
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'NamedGetter': None,
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'NamedSetter': None,
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'NamedCreator': None,
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'NamedDeleter': None,
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'Stringifier': None,
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'LegacyCaller': None,
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'Jsonifier': None
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}
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# Stringifiers and jsonifiers need to be set up whether an interface is
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# concrete or not, because they're actually prototype methods and hence
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# can apply to instances of descendant interfaces. Legacy callers and
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# named/indexed operations only need to be set up on concrete
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# interfaces, since they affect the JSClass we end up using, not the
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# prototype object.
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def addOperation(operation, m):
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if not self.operations[operation]:
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self.operations[operation] = m
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# Since stringifiers go on the prototype, we only need to worry
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# about our own stringifier, not those of our ancestor interfaces.
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if not self.interface.isExternal():
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for m in self.interface.members:
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if m.isMethod() and m.isStringifier():
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addOperation('Stringifier', m)
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if m.isMethod() and m.isJsonifier():
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addOperation('Jsonifier', m)
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if self.concrete:
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self.proxy = False
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iface = self.interface
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for m in iface.members:
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# Don't worry about inheriting legacycallers either: in
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# practice these are on most-derived prototypes.
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if m.isMethod() and m.isLegacycaller():
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if not m.isIdentifierLess():
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raise TypeError("We don't support legacycaller with "
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"identifier.\n%s" % m.location)
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if len(m.signatures()) != 1:
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raise TypeError("We don't support overloaded "
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"legacycaller.\n%s" % m.location)
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addOperation('LegacyCaller', m)
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while iface:
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for m in iface.members:
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if not m.isMethod():
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continue
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def addIndexedOrNamedOperation(operation, m):
|
|
if m.isIndexed():
|
|
operation = 'Indexed' + operation
|
|
else:
|
|
assert m.isNamed()
|
|
operation = 'Named' + operation
|
|
addOperation(operation, m)
|
|
|
|
if m.isGetter():
|
|
addIndexedOrNamedOperation('Getter', m)
|
|
if m.isSetter():
|
|
addIndexedOrNamedOperation('Setter', m)
|
|
if m.isCreator():
|
|
addIndexedOrNamedOperation('Creator', m)
|
|
if m.isDeleter():
|
|
addIndexedOrNamedOperation('Deleter', m)
|
|
if m.isLegacycaller() and iface != self.interface:
|
|
raise TypeError("We don't support legacycaller on "
|
|
"non-leaf interface %s.\n%s" %
|
|
(iface, iface.location))
|
|
|
|
iface.setUserData('hasConcreteDescendant', True)
|
|
iface = iface.parent
|
|
|
|
self.proxy = (self.supportsIndexedProperties() or
|
|
(self.supportsNamedProperties() and
|
|
not self.hasNamedPropertiesObject))
|
|
|
|
if self.proxy:
|
|
if (not self.operations['IndexedGetter'] and
|
|
(self.operations['IndexedSetter'] or
|
|
self.operations['IndexedDeleter'] or
|
|
self.operations['IndexedCreator'])):
|
|
raise SyntaxError("%s supports indexed properties but does "
|
|
"not have an indexed getter.\n%s" %
|
|
(self.interface, self.interface.location))
|
|
if (not self.operations['NamedGetter'] and
|
|
(self.operations['NamedSetter'] or
|
|
self.operations['NamedDeleter'] or
|
|
self.operations['NamedCreator'])):
|
|
raise SyntaxError("%s supports named properties but does "
|
|
"not have a named getter.\n%s" %
|
|
(self.interface, self.interface.location))
|
|
iface = self.interface
|
|
while iface:
|
|
iface.setUserData('hasProxyDescendant', True)
|
|
iface = iface.parent
|
|
|
|
if desc.get('wantsQI', None) is not None:
|
|
self._wantsQI = desc.get('wantsQI', None)
|
|
self.wrapperCache = (not self.interface.isCallback() and
|
|
not self.interface.isIteratorInterface() and
|
|
desc.get('wrapperCache', True))
|
|
|
|
def make_name(name):
|
|
return name + "_workers" if self.workers else name
|
|
self.name = make_name(interface.identifier.name)
|
|
|
|
# self.extendedAttributes is a dict of dicts, keyed on
|
|
# all/getterOnly/setterOnly and then on member name. Values are an
|
|
# array of extended attributes.
|
|
self.extendedAttributes = {'all': {}, 'getterOnly': {}, 'setterOnly': {}}
|
|
|
|
def addExtendedAttribute(attribute, config):
|
|
def add(key, members, attribute):
|
|
for member in members:
|
|
self.extendedAttributes[key].setdefault(member, []).append(attribute)
|
|
|
|
if isinstance(config, dict):
|
|
for key in ['all', 'getterOnly', 'setterOnly']:
|
|
add(key, config.get(key, []), attribute)
|
|
elif isinstance(config, list):
|
|
add('all', config, attribute)
|
|
else:
|
|
assert isinstance(config, str)
|
|
if config == '*':
|
|
iface = self.interface
|
|
while iface:
|
|
add('all', map(lambda m: m.name, iface.members), attribute)
|
|
iface = iface.parent
|
|
else:
|
|
add('all', [config], attribute)
|
|
|
|
if self.interface.isJSImplemented():
|
|
addExtendedAttribute('implicitJSContext', ['constructor'])
|
|
else:
|
|
for attribute in ['implicitJSContext']:
|
|
addExtendedAttribute(attribute, desc.get(attribute, {}))
|
|
|
|
self._binaryNames = desc.get('binaryNames', {})
|
|
self._binaryNames.setdefault('__legacycaller', 'LegacyCall')
|
|
self._binaryNames.setdefault('__stringifier', 'Stringify')
|
|
|
|
if not self.interface.isExternal():
|
|
self.anypermissions = dict()
|
|
self.allpermissions = dict()
|
|
|
|
# Adds a permission list to this descriptor and returns the index to use.
|
|
def addPermissions(ifaceOrMember, attribute):
|
|
if attribute == "CheckAllPermissions":
|
|
permissions = self.allpermissions
|
|
else:
|
|
permissions = self.anypermissions
|
|
|
|
checkPermissions = ifaceOrMember.getExtendedAttribute(attribute)
|
|
if checkPermissions is None:
|
|
return None
|
|
|
|
# It's a list of whitespace-separated strings
|
|
assert(len(checkPermissions) is 1)
|
|
assert(checkPermissions[0] is not None)
|
|
checkPermissions = checkPermissions[0]
|
|
permissionsList = checkPermissions.split()
|
|
if len(permissionsList) == 0:
|
|
raise TypeError("Need at least one permission name for %s" % attribute)
|
|
|
|
permissionsList = tuple(sorted(set(permissionsList)))
|
|
return permissions.setdefault(permissionsList, len(permissions))
|
|
|
|
self.checkAnyPermissionsIndex = addPermissions(self.interface, "CheckAnyPermissions")
|
|
self.checkAnyPermissionsIndicesForMembers = dict()
|
|
self.checkAllPermissionsIndex = addPermissions(self.interface, "CheckAllPermissions")
|
|
self.checkAllPermissionsIndicesForMembers = dict()
|
|
for m in self.interface.members:
|
|
permissionsIndex = addPermissions(m, "CheckAnyPermissions")
|
|
if permissionsIndex is not None:
|
|
self.checkAnyPermissionsIndicesForMembers[m.identifier.name] = permissionsIndex
|
|
allpermissionsIndex = addPermissions(m, "CheckAllPermissions")
|
|
if allpermissionsIndex is not None:
|
|
self.checkAllPermissionsIndicesForMembers[m.identifier.name] = allpermissionsIndex
|
|
|
|
def isTestInterface(iface):
|
|
return (iface.identifier.name in ["TestInterface",
|
|
"TestJSImplInterface",
|
|
"TestRenamedInterface"])
|
|
|
|
self.featureDetectibleThings = set()
|
|
if not isTestInterface(self.interface):
|
|
if (self.interface.getExtendedAttribute("CheckAnyPermissions") or
|
|
self.interface.getExtendedAttribute("CheckAllPermissions") or
|
|
self.interface.getExtendedAttribute("AvailableIn") == "PrivilegedApps"):
|
|
if self.interface.getNavigatorProperty():
|
|
self.featureDetectibleThings.add("Navigator.%s" % self.interface.getNavigatorProperty())
|
|
else:
|
|
iface = self.interface.identifier.name
|
|
self.featureDetectibleThings.add(iface)
|
|
for m in self.interface.members:
|
|
self.featureDetectibleThings.add("%s.%s" % (iface, m.identifier.name))
|
|
|
|
for m in self.interface.members:
|
|
if (m.getExtendedAttribute("CheckAnyPermissions") or
|
|
m.getExtendedAttribute("CheckAllPermissions") or
|
|
m.getExtendedAttribute("AvailableIn") == "PrivilegedApps"):
|
|
self.featureDetectibleThings.add("%s.%s" % (self.interface.identifier.name, m.identifier.name))
|
|
|
|
for member in self.interface.members:
|
|
if not member.isAttr() and not member.isMethod():
|
|
continue
|
|
binaryName = member.getExtendedAttribute("BinaryName")
|
|
if binaryName:
|
|
assert isinstance(binaryName, list)
|
|
assert len(binaryName) == 1
|
|
self._binaryNames.setdefault(member.identifier.name,
|
|
binaryName[0])
|
|
|
|
# Build the prototype chain.
|
|
self.prototypeChain = []
|
|
parent = interface
|
|
while parent:
|
|
self.prototypeChain.insert(0, parent.identifier.name)
|
|
parent = parent.parent
|
|
config.maxProtoChainLength = max(config.maxProtoChainLength,
|
|
len(self.prototypeChain))
|
|
|
|
def binaryNameFor(self, name):
|
|
return self._binaryNames.get(name, name)
|
|
|
|
@property
|
|
def prototypeNameChain(self):
|
|
return map(lambda p: self.getDescriptor(p).name, self.prototypeChain)
|
|
|
|
@property
|
|
def parentPrototypeName(self):
|
|
if len(self.prototypeChain) == 1:
|
|
return None
|
|
return self.getDescriptor(self.prototypeChain[-2]).name
|
|
|
|
def hasInterfaceOrInterfacePrototypeObject(self):
|
|
|
|
# Forward-declared interfaces don't need either interface object or
|
|
# interface prototype object as they're going to use QI (on main thread)
|
|
# or be passed as a JSObject (on worker threads).
|
|
if self.interface.isExternal():
|
|
return False
|
|
|
|
return self.interface.hasInterfaceObject() or self.interface.hasInterfacePrototypeObject()
|
|
|
|
@property
|
|
def hasNamedPropertiesObject(self):
|
|
if self.interface.isExternal():
|
|
return False
|
|
|
|
return self.isGlobal() and self.supportsNamedProperties()
|
|
|
|
def getExtendedAttributes(self, member, getter=False, setter=False):
|
|
def ensureValidThrowsExtendedAttribute(attr):
|
|
assert(attr is None or attr is True or len(attr) == 1)
|
|
if (attr is not None and attr is not True and
|
|
'Workers' not in attr and 'MainThread' not in attr):
|
|
raise TypeError("Unknown value for 'Throws': " + attr[0])
|
|
|
|
def maybeAppendInfallibleToAttrs(attrs, throws):
|
|
ensureValidThrowsExtendedAttribute(throws)
|
|
if (throws is None or
|
|
(throws is not True and
|
|
('Workers' not in throws or not self.workers) and
|
|
('MainThread' not in throws or self.workers))):
|
|
attrs.append("infallible")
|
|
|
|
name = member.identifier.name
|
|
throws = self.interface.isJSImplemented() or member.getExtendedAttribute("Throws")
|
|
if member.isMethod():
|
|
# JSObject-returning [NewObject] methods must be fallible,
|
|
# since they have to (fallibly) allocate the new JSObject.
|
|
if (member.getExtendedAttribute("NewObject") and
|
|
methodReturnsJSObject(member)):
|
|
throws = True
|
|
attrs = self.extendedAttributes['all'].get(name, [])
|
|
maybeAppendInfallibleToAttrs(attrs, throws)
|
|
return attrs
|
|
|
|
assert member.isAttr()
|
|
assert bool(getter) != bool(setter)
|
|
key = 'getterOnly' if getter else 'setterOnly'
|
|
attrs = self.extendedAttributes['all'].get(name, []) + self.extendedAttributes[key].get(name, [])
|
|
if throws is None:
|
|
throwsAttr = "GetterThrows" if getter else "SetterThrows"
|
|
throws = member.getExtendedAttribute(throwsAttr)
|
|
maybeAppendInfallibleToAttrs(attrs, throws)
|
|
return attrs
|
|
|
|
def supportsIndexedProperties(self):
|
|
return self.operations['IndexedGetter'] is not None
|
|
|
|
def supportsNamedProperties(self):
|
|
return self.operations['NamedGetter'] is not None
|
|
|
|
def needsConstructHookHolder(self):
|
|
assert self.interface.hasInterfaceObject()
|
|
return False
|
|
|
|
def needsHeaderInclude(self):
|
|
"""
|
|
An interface doesn't need a header file if it is not concrete, not
|
|
pref-controlled, has no prototype object, has no static methods or
|
|
attributes and has no parent. The parent matters because we assert
|
|
things about refcounting that depend on the actual underlying type if we
|
|
have a parent.
|
|
|
|
"""
|
|
return (self.interface.isExternal() or self.concrete or
|
|
self.interface.hasInterfacePrototypeObject() or
|
|
any((m.isAttr() or m.isMethod()) and m.isStatic() for m in self.interface.members) or
|
|
self.interface.parent)
|
|
|
|
def hasThreadChecks(self):
|
|
return ((self.isExposedConditionally() and
|
|
not self.interface.isExposedInWindow()) or
|
|
self.interface.isExposedInSomeButNotAllWorkers())
|
|
|
|
def isExposedConditionally(self):
|
|
return (self.interface.isExposedConditionally() or
|
|
self.interface.isExposedInSomeButNotAllWorkers())
|
|
|
|
def needsXrayResolveHooks(self):
|
|
"""
|
|
Generally, any interface with NeedResolve needs Xray
|
|
resolveOwnProperty and enumerateOwnProperties hooks. But for
|
|
the special case of plugin-loading elements, we do NOT want
|
|
those, because we don't want to instantiate plug-ins simply
|
|
due to chrome touching them and that's all those hooks do on
|
|
those elements. So we special-case those here.
|
|
"""
|
|
return (self.interface.getExtendedAttribute("NeedResolve") and
|
|
self.interface.identifier.name not in ["HTMLObjectElement",
|
|
"HTMLEmbedElement",
|
|
"HTMLAppletElement"])
|
|
|
|
def needsSpecialGenericOps(self):
|
|
"""
|
|
Returns true if this descriptor requires generic ops other than
|
|
GenericBindingMethod/GenericBindingGetter/GenericBindingSetter.
|
|
|
|
In practice we need to do this if our this value might be an XPConnect
|
|
object or if we need to coerce null/undefined to the global.
|
|
"""
|
|
return self.hasXPConnectImpls or self.interface.isOnGlobalProtoChain()
|
|
|
|
def isGlobal(self):
|
|
"""
|
|
Returns true if this is the primary interface for a global object
|
|
of some sort.
|
|
"""
|
|
return (self.interface.getExtendedAttribute("Global") or
|
|
self.interface.getExtendedAttribute("PrimaryGlobal"))
|
|
|
|
|
|
# Some utility methods
|
|
def getTypesFromDescriptor(descriptor):
|
|
"""
|
|
Get all argument and return types for all members of the descriptor
|
|
"""
|
|
members = [m for m in descriptor.interface.members]
|
|
if descriptor.interface.ctor():
|
|
members.append(descriptor.interface.ctor())
|
|
members.extend(descriptor.interface.namedConstructors)
|
|
signatures = [s for m in members if m.isMethod() for s in m.signatures()]
|
|
types = []
|
|
for s in signatures:
|
|
assert len(s) == 2
|
|
(returnType, arguments) = s
|
|
types.append(returnType)
|
|
types.extend(a.type for a in arguments)
|
|
|
|
types.extend(a.type for a in members if a.isAttr())
|
|
return types
|
|
|
|
|
|
def getFlatTypes(types):
|
|
retval = set()
|
|
for type in types:
|
|
type = type.unroll()
|
|
if type.isUnion():
|
|
retval |= set(type.flatMemberTypes)
|
|
else:
|
|
retval.add(type)
|
|
return retval
|
|
|
|
|
|
def getTypesFromDictionary(dictionary):
|
|
"""
|
|
Get all member types for this dictionary
|
|
"""
|
|
types = []
|
|
curDict = dictionary
|
|
while curDict:
|
|
types.extend([m.type for m in curDict.members])
|
|
curDict = curDict.parent
|
|
return types
|
|
|
|
|
|
def getTypesFromCallback(callback):
|
|
"""
|
|
Get the types this callback depends on: its return type and the
|
|
types of its arguments.
|
|
"""
|
|
sig = callback.signatures()[0]
|
|
types = [sig[0]] # Return type
|
|
types.extend(arg.type for arg in sig[1]) # Arguments
|
|
return types
|
|
|
|
|
|
def findCallbacksAndDictionaries(inputTypes):
|
|
"""
|
|
Ensure that all callbacks and dictionaries reachable from types end up in
|
|
the returned callbacks and dictionaries sets.
|
|
|
|
Note that we assume that our initial invocation already includes all types
|
|
reachable via descriptors in "types", so we only have to deal with things
|
|
that are themeselves reachable via callbacks and dictionaries.
|
|
"""
|
|
def doFindCallbacksAndDictionaries(types, callbacks, dictionaries):
|
|
unhandledTypes = set()
|
|
for type in types:
|
|
if type.isCallback() and type.callback not in callbacks:
|
|
unhandledTypes |= getFlatTypes(getTypesFromCallback(type.callback))
|
|
callbacks.add(type.callback)
|
|
elif type.isDictionary() and type.inner not in dictionaries:
|
|
d = type.inner
|
|
unhandledTypes |= getFlatTypes(getTypesFromDictionary(d))
|
|
while d:
|
|
dictionaries.add(d)
|
|
d = d.parent
|
|
if len(unhandledTypes) != 0:
|
|
doFindCallbacksAndDictionaries(unhandledTypes, callbacks, dictionaries)
|
|
|
|
retCallbacks = set()
|
|
retDictionaries = set()
|
|
doFindCallbacksAndDictionaries(inputTypes, retCallbacks, retDictionaries)
|
|
return (retCallbacks, retDictionaries)
|
|
|
|
|
|
def getAllTypes(descriptors, dictionaries, callbacks):
|
|
"""
|
|
Generate all the types we're dealing with. For each type, a tuple
|
|
containing type, descriptor, dictionary is yielded. The
|
|
descriptor and dictionary can be None if the type does not come
|
|
from a descriptor or dictionary; they will never both be non-None.
|
|
"""
|
|
for d in descriptors:
|
|
if d.interface.isExternal():
|
|
continue
|
|
for t in getTypesFromDescriptor(d):
|
|
yield (t, d, None)
|
|
for dictionary in dictionaries:
|
|
for t in getTypesFromDictionary(dictionary):
|
|
yield (t, None, dictionary)
|
|
for callback in callbacks:
|
|
for t in getTypesFromCallback(callback):
|
|
yield (t, None, None)
|
|
|
|
def iteratorNativeType(descriptor):
|
|
assert descriptor.interface.isIterable()
|
|
iterableDecl = descriptor.interface.maplikeOrSetlikeOrIterable
|
|
assert iterableDecl.isPairIterator()
|
|
return "mozilla::dom::IterableIterator<%s>" % descriptor.nativeType
|