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5c995f6064
gecko-dev/dom/bindings/parser/WebIDL.py
Boris Zbarsky 5c995f6064 Bug 963321 part 1. Add WebIDL parser support for having [Cached] dictionary attributes. r=khuey 
We don't know at handleExtendedAttribute time what the identifier will
map to, so have to do the check that [Frozen] is not being misused
later.
2014-02-05 13:38:15 -05:00

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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
""" A WebIDL parser. """
from ply import lex, yacc
import re
import os
import traceback
import math
# Machinery
def parseInt(literal):
string = literal
sign = 0
base = 0
if string[0] == '-':
sign = -1
string = string[1:]
else:
sign = 1
if string[0] == '0' and len(string) > 1:
if string[1] == 'x' or string[1] == 'X':
base = 16
string = string[2:]
else:
base = 8
string = string[1:]
else:
base = 10
value = int(string, base)
return value * sign
# Magic for creating enums
def M_add_class_attribs(attribs, start):
def foo(name, bases, dict_):
for v, k in enumerate(attribs):
dict_[k] = start + v
assert 'length' not in dict_
dict_['length'] = start + len(attribs)
return type(name, bases, dict_)
return foo
def enum(*names, **kw):
if len(kw) == 1:
base = kw['base'].__class__
start = base.length
else:
assert len(kw) == 0
base = object
start = 0
class Foo(base):
__metaclass__ = M_add_class_attribs(names, start)
def __setattr__(self, name, value): # this makes it read-only
raise NotImplementedError
return Foo()
class WebIDLError(Exception):
def __init__(self, message, locations, warning=False):
self.message = message
self.locations = [str(loc) for loc in locations]
self.warning = warning
def __str__(self):
return "%s: %s%s%s" % (self.warning and 'warning' or 'error',
self.message,
", " if len(self.locations) != 0 else "",
"\n".join(self.locations))
class Location(object):
def __init__(self, lexer, lineno, lexpos, filename):
self._line = None
self._lineno = lineno
self._lexpos = lexpos
self._lexdata = lexer.lexdata
self._file = filename if filename else "<unknown>"
def __eq__(self, other):
return self._lexpos == other._lexpos and \
self._file == other._file
def filename(self):
return self._file
def resolve(self):
if self._line:
return
startofline = self._lexdata.rfind('\n', 0, self._lexpos) + 1
endofline = self._lexdata.find('\n', self._lexpos, self._lexpos + 80)
if endofline != -1:
self._line = self._lexdata[startofline:endofline]
else:
self._line = self._lexdata[startofline:]
self._colno = self._lexpos - startofline
# Our line number seems to point to the start of self._lexdata
self._lineno += self._lexdata.count('\n', 0, startofline)
def get(self):
self.resolve()
return "%s line %s:%s" % (self._file, self._lineno, self._colno)
def _pointerline(self):
return " " * self._colno + "^"
def __str__(self):
self.resolve()
return "%s line %s:%s\n%s\n%s" % (self._file, self._lineno, self._colno,
self._line, self._pointerline())
class BuiltinLocation(object):
def __init__(self, text):
self.msg = text + "\n"
def __eq__(self, other):
return isinstance(other, BuiltinLocation) and \
self.msg == other.msg
def filename(self):
return '<builtin>'
def resolve(self):
pass
def get(self):
return self.msg
def __str__(self):
return self.get()
# Data Model
class IDLObject(object):
def __init__(self, location):
self.location = location
self.userData = dict()
def filename(self):
return self.location.filename()
def isInterface(self):
return False
def isEnum(self):
return False
def isCallback(self):
return False
def isType(self):
return False
def isDictionary(self):
return False;
def isUnion(self):
return False
def getUserData(self, key, default):
return self.userData.get(key, default)
def setUserData(self, key, value):
self.userData[key] = value
def addExtendedAttributes(self, attrs):
assert False # Override me!
def handleExtendedAttribute(self, attr):
assert False # Override me!
def _getDependentObjects(self):
assert False # Override me!
def getDeps(self, visited=None):
""" Return a set of files that this object depends on. If any of
these files are changed the parser needs to be rerun to regenerate
a new IDLObject.
The visited argument is a set of all the objects already visited.
We must test to see if we are in it, and if so, do nothing. This
prevents infinite recursion."""
# NB: We can't use visited=set() above because the default value is
# evaluated when the def statement is evaluated, not when the function
# is executed, so there would be one set for all invocations.
if visited == None:
visited = set()
if self in visited:
return set()
visited.add(self)
deps = set()
if self.filename() != "<builtin>":
deps.add(self.filename())
for d in self._getDependentObjects():
deps = deps.union(d.getDeps(visited))
return deps
class IDLScope(IDLObject):
def __init__(self, location, parentScope, identifier):
IDLObject.__init__(self, location)
self.parentScope = parentScope
if identifier:
assert isinstance(identifier, IDLIdentifier)
self._name = identifier
else:
self._name = None
self._dict = {}
def __str__(self):
return self.QName()
def QName(self):
if self._name:
return self._name.QName() + "::"
return "::"
def ensureUnique(self, identifier, object):
"""
Ensure that there is at most one 'identifier' in scope ('self').
Note that object can be None. This occurs if we end up here for an
interface type we haven't seen yet.
"""
assert isinstance(identifier, IDLUnresolvedIdentifier)
assert not object or isinstance(object, IDLObjectWithIdentifier)
assert not object or object.identifier == identifier
if identifier.name in self._dict:
if not object:
return
# ensureUnique twice with the same object is not allowed
assert id(object) != id(self._dict[identifier.name])
replacement = self.resolveIdentifierConflict(self, identifier,
self._dict[identifier.name],
object)
self._dict[identifier.name] = replacement
return
assert object
self._dict[identifier.name] = object
def resolveIdentifierConflict(self, scope, identifier, originalObject, newObject):
if isinstance(originalObject, IDLExternalInterface) and \
isinstance(newObject, IDLExternalInterface) and \
originalObject.identifier.name == newObject.identifier.name:
return originalObject
# We do the merging of overloads here as opposed to in IDLInterface
# because we need to merge overloads of NamedConstructors and we need to
# detect conflicts in those across interfaces. See also the comment in
# IDLInterface.addExtendedAttributes for "NamedConstructor".
if originalObject.tag == IDLInterfaceMember.Tags.Method and \
newObject.tag == IDLInterfaceMember.Tags.Method:
return originalObject.addOverload(newObject)
# Default to throwing, derived classes can override.
conflictdesc = "\n\t%s at %s\n\t%s at %s" % \
(originalObject, originalObject.location, newObject, newObject.location)
raise WebIDLError(
"Multiple unresolvable definitions of identifier '%s' in scope '%s%s"
% (identifier.name, str(self), conflictdesc), [])
def _lookupIdentifier(self, identifier):
return self._dict[identifier.name]
def lookupIdentifier(self, identifier):
assert isinstance(identifier, IDLIdentifier)
assert identifier.scope == self
return self._lookupIdentifier(identifier)
class IDLIdentifier(IDLObject):
def __init__(self, location, scope, name):
IDLObject.__init__(self, location)
self.name = name
assert isinstance(scope, IDLScope)
self.scope = scope
def __str__(self):
return self.QName()
def QName(self):
return self.scope.QName() + self.name
def __hash__(self):
return self.QName().__hash__()
def __eq__(self, other):
return self.QName() == other.QName()
def object(self):
return self.scope.lookupIdentifier(self)
class IDLUnresolvedIdentifier(IDLObject):
def __init__(self, location, name, allowDoubleUnderscore = False,
allowForbidden = False):
IDLObject.__init__(self, location)
assert len(name) > 0
if name[:2] == "__" and name != "__content" and name != "___noSuchMethod__" and not allowDoubleUnderscore:
raise WebIDLError("Identifiers beginning with __ are reserved",
[location])
if name[0] == '_' and not allowDoubleUnderscore:
name = name[1:]
# TODO: Bug 872377, Restore "toJSON" to below list.
# We sometimes need custom serialization, so allow toJSON for now.
if (name in ["constructor", "toString"] and
not allowForbidden):
raise WebIDLError("Cannot use reserved identifier '%s'" % (name),
[location])
self.name = name
def __str__(self):
return self.QName()
def QName(self):
return "<unresolved scope>::" + self.name
def resolve(self, scope, object):
assert isinstance(scope, IDLScope)
assert not object or isinstance(object, IDLObjectWithIdentifier)
assert not object or object.identifier == self
scope.ensureUnique(self, object)
identifier = IDLIdentifier(self.location, scope, self.name)
if object:
object.identifier = identifier
return identifier
def finish(self):
assert False # Should replace with a resolved identifier first.
class IDLObjectWithIdentifier(IDLObject):
def __init__(self, location, parentScope, identifier):
IDLObject.__init__(self, location)
assert isinstance(identifier, IDLUnresolvedIdentifier)
self.identifier = identifier
if parentScope:
self.resolve(parentScope)
self.treatNullAs = "Default"
def resolve(self, parentScope):
assert isinstance(parentScope, IDLScope)
assert isinstance(self.identifier, IDLUnresolvedIdentifier)
self.identifier.resolve(parentScope, self)
def checkForStringHandlingExtendedAttributes(self, attrs,
isDictionaryMember=False,
isOptional=False):
"""
A helper function to deal with TreatNullAs. Returns the list
of attrs it didn't handle itself.
"""
assert isinstance(self, IDLArgument) or isinstance(self, IDLAttribute)
unhandledAttrs = list()
for attr in attrs:
if not attr.hasValue():
unhandledAttrs.append(attr)
continue
identifier = attr.identifier()
value = attr.value()
if identifier == "TreatNullAs":
if not self.type.isDOMString() or self.type.nullable():
raise WebIDLError("[TreatNullAs] is only allowed on "
"arguments or attributes whose type is "
"DOMString",
[self.location])
if isDictionaryMember:
raise WebIDLError("[TreatNullAs] is not allowed for "
"dictionary members", [self.location])
if value != 'EmptyString':
raise WebIDLError("[TreatNullAs] must take the identifier "
"'EmptyString', not '%s'" % value,
[self.location])
self.treatNullAs = value
else:
unhandledAttrs.append(attr)
return unhandledAttrs
class IDLObjectWithScope(IDLObjectWithIdentifier, IDLScope):
def __init__(self, location, parentScope, identifier):
assert isinstance(identifier, IDLUnresolvedIdentifier)
IDLObjectWithIdentifier.__init__(self, location, parentScope, identifier)
IDLScope.__init__(self, location, parentScope, self.identifier)
class IDLIdentifierPlaceholder(IDLObjectWithIdentifier):
def __init__(self, location, identifier):
assert isinstance(identifier, IDLUnresolvedIdentifier)
IDLObjectWithIdentifier.__init__(self, location, None, identifier)
def finish(self, scope):
try:
scope._lookupIdentifier(self.identifier)
except:
raise WebIDLError("Unresolved type '%s'." % self.identifier,
[self.location])
obj = self.identifier.resolve(scope, None)
return scope.lookupIdentifier(obj)
class IDLExternalInterface(IDLObjectWithIdentifier):
def __init__(self, location, parentScope, identifier):
assert isinstance(identifier, IDLUnresolvedIdentifier)
assert isinstance(parentScope, IDLScope)
self.parent = None
IDLObjectWithIdentifier.__init__(self, location, parentScope, identifier)
IDLObjectWithIdentifier.resolve(self, parentScope)
def finish(self, scope):
pass
def validate(self):
pass
def isExternal(self):
return True
def isInterface(self):
return True
def isConsequential(self):
return False
def addExtendedAttributes(self, attrs):
assert len(attrs) == 0
def resolve(self, parentScope):
pass
def getJSImplementation(self):
return None
def isJSImplemented(self):
return False
def getNavigatorProperty(self):
return None
def _getDependentObjects(self):
return set()
class IDLInterface(IDLObjectWithScope):
def __init__(self, location, parentScope, name, parent, members,
isPartial):
assert isinstance(parentScope, IDLScope)
assert isinstance(name, IDLUnresolvedIdentifier)
assert not isPartial or not parent
self.parent = None
self._callback = False
self._finished = False
self.members = []
# namedConstructors needs deterministic ordering because bindings code
# outputs the constructs in the order that namedConstructors enumerates
# them.
self.namedConstructors = list()
self.implementedInterfaces = set()
self._consequential = False
self._isPartial = True
# self.interfacesBasedOnSelf is the set of interfaces that inherit from
# self or have self as a consequential interface, including self itself.
# Used for distinguishability checking.
self.interfacesBasedOnSelf = set([self])
# self.interfacesImplementingSelf is the set of interfaces that directly
# have self as a consequential interface
self.interfacesImplementingSelf = set()
self._hasChildInterfaces = False
self._isOnGlobalProtoChain = False
# Tracking of the number of reserved slots we need for our
# members and those of ancestor interfaces.
self.totalMembersInSlots = 0
# Tracking of the number of own own members we have in slots
self._ownMembersInSlots = 0
IDLObjectWithScope.__init__(self, location, parentScope, name)
if not isPartial:
self.setNonPartial(location, parent, members)
else:
# Just remember our members for now
self.members = members
def __str__(self):
return "Interface '%s'" % self.identifier.name
def ctor(self):
identifier = IDLUnresolvedIdentifier(self.location, "constructor",
allowForbidden=True)
try:
return self._lookupIdentifier(identifier)
except:
return None
def resolveIdentifierConflict(self, scope, identifier, originalObject, newObject):
assert isinstance(scope, IDLScope)
assert isinstance(originalObject, IDLInterfaceMember)
assert isinstance(newObject, IDLInterfaceMember)
retval = IDLScope.resolveIdentifierConflict(self, scope, identifier,
originalObject, newObject)
# Might be a ctor, which isn't in self.members
if newObject in self.members:
self.members.remove(newObject)
return retval
def finish(self, scope):
if self._finished:
return
self._finished = True
if self._isPartial:
raise WebIDLError("Interface %s does not have a non-partial "
"declaration" % self.identifier.name,
[self.location])
assert not self.parent or isinstance(self.parent, IDLIdentifierPlaceholder)
parent = self.parent.finish(scope) if self.parent else None
if parent and isinstance(parent, IDLExternalInterface):
raise WebIDLError("%s inherits from %s which does not have "
"a definition" %
(self.identifier.name,
self.parent.identifier.name),
[self.location])
assert not parent or isinstance(parent, IDLInterface)
self.parent = parent
assert iter(self.members)
if self.parent:
self.parent.finish(scope)
self.parent._hasChildInterfaces = True
self.totalMembersInSlots = self.parent.totalMembersInSlots
# Interfaces with [Global] must not have anything inherit from them
if self.parent.getExtendedAttribute("Global"):
# Note: This is not a self.parent.isOnGlobalProtoChain() check
# because ancestors of a [Global] interface can have other
# descendants.
raise WebIDLError("[Global] interface has another interface "
"inheriting from it",
[self.location, self.parent.location])
# Callbacks must not inherit from non-callbacks or inherit from
# anything that has consequential interfaces.
# XXXbz Can non-callbacks inherit from callbacks? Spec issue pending.
# XXXbz Can callbacks have consequential interfaces? Spec issue pending
if self.isCallback():
if not self.parent.isCallback():
raise WebIDLError("Callback interface %s inheriting from "
"non-callback interface %s" %
(self.identifier.name,
self.parent.identifier.name),
[self.location, self.parent.location])
elif self.parent.isCallback():
raise WebIDLError("Non-callback interface %s inheriting from "
"callback interface %s" %
(self.identifier.name,
self.parent.identifier.name),
[self.location, self.parent.location])
for iface in self.implementedInterfaces:
iface.finish(scope)
cycleInGraph = self.findInterfaceLoopPoint(self)
if cycleInGraph:
raise WebIDLError("Interface %s has itself as ancestor or "
"implemented interface" % self.identifier.name,
[self.location, cycleInGraph.location])
if self.isCallback():
# "implements" should have made sure we have no
# consequential interfaces.
assert len(self.getConsequentialInterfaces()) == 0
# And that we're not consequential.
assert not self.isConsequential()
# Now resolve() and finish() our members before importing the
# ones from our implemented interfaces.
# resolve() will modify self.members, so we need to iterate
# over a copy of the member list here.
for member in list(self.members):
member.resolve(self)
for member in self.members:
member.finish(scope)
ctor = self.ctor()
if ctor is not None:
ctor.finish(scope)
for ctor in self.namedConstructors:
ctor.finish(scope)
# Make a copy of our member list, so things that implement us
# can get those without all the stuff we implement ourselves
# admixed.
self.originalMembers = list(self.members)
# Import everything from our consequential interfaces into
# self.members. Sort our consequential interfaces by name
# just so we have a consistent order.
for iface in sorted(self.getConsequentialInterfaces(),
cmp=cmp,
key=lambda x: x.identifier.name):
# Flag the interface as being someone's consequential interface
iface.setIsConsequentialInterfaceOf(self)
additionalMembers = iface.originalMembers;
for additionalMember in additionalMembers:
for member in self.members:
if additionalMember.identifier.name == member.identifier.name:
raise WebIDLError(
"Multiple definitions of %s on %s coming from 'implements' statements" %
(member.identifier.name, self),
[additionalMember.location, member.location])
self.members.extend(additionalMembers)
iface.interfacesImplementingSelf.add(self)
for ancestor in self.getInheritedInterfaces():
ancestor.interfacesBasedOnSelf.add(self)
for ancestorConsequential in ancestor.getConsequentialInterfaces():
ancestorConsequential.interfacesBasedOnSelf.add(self)
for member in self.members:
if (member.isAttr() and member.isUnforgeable() and
not hasattr(member, "originatingInterface")):
member.originatingInterface = self
# Compute slot indices for our members before we pull in
# unforgeable members from our parent.
for member in self.members:
if (member.isAttr() and
(member.getExtendedAttribute("StoreInSlot") or
member.getExtendedAttribute("Cached"))):
member.slotIndex = self.totalMembersInSlots
self.totalMembersInSlots += 1
if member.getExtendedAttribute("StoreInSlot"):
self._ownMembersInSlots += 1
if self.parent:
# Make sure we don't shadow any of the [Unforgeable] attributes on
# our ancestor interfaces. We don't have to worry about
# consequential interfaces here, because those have already been
# imported into the relevant .members lists. And we don't have to
# worry about anything other than our parent, because it has already
# imported its ancestors unforgeable attributes into its member
# list.
for unforgeableAttr in (attr for attr in self.parent.members if
attr.isAttr() and not attr.isStatic() and
attr.isUnforgeable()):
shadows = [ m for m in self.members if
(m.isAttr() or m.isMethod()) and
not m.isStatic() and
m.identifier.name == unforgeableAttr.identifier.name ]
if len(shadows) != 0:
locs = [unforgeableAttr.location] + [ s.location for s
in shadows ]
raise WebIDLError("Interface %s shadows [Unforgeable] "
"members of %s" %
(self.identifier.name,
ancestor.identifier.name),
locs)
# And now just stick it in our members, since we won't be
# inheriting this down the proto chain. If we really cared we
# could try to do something where we set up the unforgeable
# attributes of ancestor interfaces, with their corresponding
# getters, on our interface, but that gets pretty complicated
# and seems unnecessary.
self.members.append(unforgeableAttr)
# Ensure that there's at most one of each {named,indexed}
# {getter,setter,creator,deleter}, at most one stringifier,
# and at most one legacycaller. Note that this last is not
# quite per spec, but in practice no one overloads
# legacycallers.
specialMembersSeen = {}
for member in self.members:
if not member.isMethod():
continue
if member.isGetter():
memberType = "getters"
elif member.isSetter():
memberType = "setters"
elif member.isCreator():
memberType = "creators"
elif member.isDeleter():
memberType = "deleters"
elif member.isStringifier():
memberType = "stringifiers"
elif member.isJsonifier():
memberType = "jsonifiers"
elif member.isLegacycaller():
memberType = "legacycallers"
else:
continue
if (memberType != "stringifiers" and memberType != "legacycallers" and
memberType != "jsonifiers"):
if member.isNamed():
memberType = "named " + memberType
else:
assert member.isIndexed()
memberType = "indexed " + memberType
if memberType in specialMembersSeen:
raise WebIDLError("Multiple " + memberType + " on %s" % (self),
[self.location,
specialMembersSeen[memberType].location,
member.location])
specialMembersSeen[memberType] = member
if self._isOnGlobalProtoChain:
# Make sure we have no named setters, creators, or deleters
for memberType in ["setter", "creator", "deleter"]:
memberId = "named " + memberType + "s"
if memberId in specialMembersSeen:
raise WebIDLError("Interface with [Global] has a named %s" %
memberType,
[self.location,
specialMembersSeen[memberId].location])
# Make sure we're not [OverrideBuiltins]
if self.getExtendedAttribute("OverrideBuiltins"):
raise WebIDLError("Interface with [Global] also has "
"[OverrideBuiltins]",
[self.location])
# Mark all of our ancestors as being on the global's proto chain too
parent = self.parent
while parent:
# Must not inherit from an interface with [OverrideBuiltins]
if parent.getExtendedAttribute("OverrideBuiltins"):
raise WebIDLError("Interface with [Global] inherits from "
"interface with [OverrideBuiltins]",
[self.location, parent.location])
parent._isOnGlobalProtoChain = True
parent = parent.parent
def validate(self):
for member in self.members:
member.validate()
# Check that PutForwards refers to another attribute and that no
# cycles exist in forwarded assignments.
if member.isAttr():
iface = self
attr = member
putForwards = attr.getExtendedAttribute("PutForwards")
if putForwards and self.isCallback():
raise WebIDLError("[PutForwards] used on an attribute "
"on interface %s which is a callback "
"interface" % self.identifier.name,
[self.location, member.location])
while putForwards is not None:
forwardIface = attr.type.unroll().inner
fowardAttr = None
for forwardedMember in forwardIface.members:
if (not forwardedMember.isAttr() or
forwardedMember.identifier.name != putForwards[0]):
continue
if forwardedMember == member:
raise WebIDLError("Cycle detected in forwarded "
"assignments for attribute %s on "
"%s" %
(member.identifier.name, self),
[member.location])
fowardAttr = forwardedMember
break
if fowardAttr is None:
raise WebIDLError("Attribute %s on %s forwards to "
"missing attribute %s" %
(attr.identifier.name, iface, putForwards),
[attr.location])
iface = forwardIface
attr = fowardAttr
putForwards = attr.getExtendedAttribute("PutForwards")
def isInterface(self):
return True
def isExternal(self):
return False
def setIsConsequentialInterfaceOf(self, other):
self._consequential = True
self.interfacesBasedOnSelf.add(other)
def isConsequential(self):
return self._consequential
def setCallback(self, value):
self._callback = value
def isCallback(self):
return self._callback
def isSingleOperationInterface(self):
assert self.isCallback() or self.isJSImplemented()
return (
# JS-implemented things should never need the
# this-handling weirdness of single-operation interfaces.
not self.isJSImplemented() and
# Not inheriting from another interface
not self.parent and
# No consequential interfaces
len(self.getConsequentialInterfaces()) == 0 and
# No attributes of any kinds
not any(m.isAttr() for m in self.members) and
# There is at least one regular operation, and all regular
# operations have the same identifier
len(set(m.identifier.name for m in self.members if
m.isMethod() and not m.isStatic())) == 1)
def inheritanceDepth(self):
depth = 0
parent = self.parent
while parent:
depth = depth + 1
parent = parent.parent
return depth
def hasConstants(self):
return any(m.isConst() for m in self.members)
def hasInterfaceObject(self):
if self.isCallback():
return self.hasConstants()
return not hasattr(self, "_noInterfaceObject")
def hasInterfacePrototypeObject(self):
return not self.isCallback() and self.getUserData('hasConcreteDescendant', False)
def addExtendedAttributes(self, attrs):
self._extendedAttrDict = {}
for attr in attrs:
identifier = attr.identifier()
# Special cased attrs
if identifier == "TreatNonCallableAsNull":
raise WebIDLError("TreatNonCallableAsNull cannot be specified on interfaces",
[attr.location, self.location])
if identifier == "TreatNonObjectAsNull":
raise WebIDLError("TreatNonObjectAsNull cannot be specified on interfaces",
[attr.location, self.location])
elif identifier == "NoInterfaceObject":
if not attr.noArguments():
raise WebIDLError("[NoInterfaceObject] must take no arguments",
[attr.location])
if self.ctor():
raise WebIDLError("Constructor and NoInterfaceObject are incompatible",
[self.location])
self._noInterfaceObject = True
elif identifier == "Constructor" or identifier == "NamedConstructor" or identifier == "ChromeConstructor":
if identifier == "Constructor" and not self.hasInterfaceObject():
raise WebIDLError(str(identifier) + " and NoInterfaceObject are incompatible",
[self.location])
if identifier == "NamedConstructor" and not attr.hasValue():
raise WebIDLError("NamedConstructor must either take an identifier or take a named argument list",
[attr.location])
if identifier == "ChromeConstructor" and not self.hasInterfaceObject():
raise WebIDLError(str(identifier) + " and NoInterfaceObject are incompatible",
[self.location])
args = attr.args() if attr.hasArgs() else []
retType = IDLWrapperType(self.location, self)
if identifier == "Constructor" or identifier == "ChromeConstructor":
name = "constructor"
allowForbidden = True
else:
name = attr.value()
allowForbidden = False
methodIdentifier = IDLUnresolvedIdentifier(self.location, name,
allowForbidden=allowForbidden)
method = IDLMethod(self.location, methodIdentifier, retType,
args, static=True)
# Constructors are always NewObject and are always
# assumed to be able to throw (since there's no way to
# indicate otherwise) and never have any other
# extended attributes.
method.addExtendedAttributes(
[IDLExtendedAttribute(self.location, ("NewObject",)),
IDLExtendedAttribute(self.location, ("Throws",))])
if identifier == "ChromeConstructor":
method.addExtendedAttributes(
[IDLExtendedAttribute(self.location, ("ChromeOnly",))])
if identifier == "Constructor" or identifier == "ChromeConstructor":
method.resolve(self)
else:
# We need to detect conflicts for NamedConstructors across
# interfaces. We first call resolve on the parentScope,
# which will merge all NamedConstructors with the same
# identifier accross interfaces as overloads.
method.resolve(self.parentScope)
# Then we look up the identifier on the parentScope. If the
# result is the same as the method we're adding then it
# hasn't been added as an overload and it's the first time
# we've encountered a NamedConstructor with that identifier.
# If the result is not the same as the method we're adding
# then it has been added as an overload and we need to check
# whether the result is actually one of our existing
# NamedConstructors.
newMethod = self.parentScope.lookupIdentifier(method.identifier)
if newMethod == method:
self.namedConstructors.append(method)
elif not newMethod in self.namedConstructors:
raise WebIDLError("NamedConstructor conflicts with a NamedConstructor of a different interface",
[method.location, newMethod.location])
elif (identifier == "ArrayClass"):
if not attr.noArguments():
raise WebIDLError("[ArrayClass] must take no arguments",
[attr.location])
if self.parent:
raise WebIDLError("[ArrayClass] must not be specified on "
"an interface with inherited interfaces",
[attr.location, self.location])
elif identifier == "Global":
if not attr.noArguments():
raise WebIDLError("[Global] must take no arguments",
[attr.location])
self._isOnGlobalProtoChain = True
elif (identifier == "PrefControlled" or
identifier == "NeedNewResolve" or
identifier == "OverrideBuiltins" or
identifier == "ChromeOnly"):
# Known extended attributes that do not take values
if not attr.noArguments():
raise WebIDLError("[%s] must take no arguments" % identifier,
[attr.location])
elif (identifier == "Pref" or
identifier == "JSImplementation" or
identifier == "HeaderFile" or
identifier == "NavigatorProperty" or
identifier == "Func"):
# Known extended attributes that take a string value
if not attr.hasValue():
raise WebIDLError("[%s] must have a value" % identifier,
[attr.location])
else:
raise WebIDLError("Unknown extended attribute %s on interface" % identifier,
[attr.location])
attrlist = attr.listValue()
self._extendedAttrDict[identifier] = attrlist if len(attrlist) else True
def addImplementedInterface(self, implementedInterface):
assert(isinstance(implementedInterface, IDLInterface))
self.implementedInterfaces.add(implementedInterface)
def getInheritedInterfaces(self):
"""
Returns a list of the interfaces this interface inherits from
(not including this interface itself). The list is in order
from most derived to least derived.
"""
assert(self._finished)
if not self.parent:
return []
parentInterfaces = self.parent.getInheritedInterfaces()
parentInterfaces.insert(0, self.parent)
return parentInterfaces
def getConsequentialInterfaces(self):
assert(self._finished)
# The interfaces we implement directly
consequentialInterfaces = set(self.implementedInterfaces)
# And their inherited interfaces
for iface in self.implementedInterfaces:
consequentialInterfaces |= set(iface.getInheritedInterfaces())
# And now collect up the consequential interfaces of all of those
temp = set()
for iface in consequentialInterfaces:
temp |= iface.getConsequentialInterfaces()
return consequentialInterfaces | temp
def findInterfaceLoopPoint(self, otherInterface):
"""
Finds an interface, amongst our ancestors and consequential interfaces,
that inherits from otherInterface or implements otherInterface
directly. If there is no such interface, returns None.
"""
if self.parent:
if self.parent == otherInterface:
return self
loopPoint = self.parent.findInterfaceLoopPoint(otherInterface)
if loopPoint:
return loopPoint
if otherInterface in self.implementedInterfaces:
return self
for iface in self.implementedInterfaces:
loopPoint = iface.findInterfaceLoopPoint(otherInterface)
if loopPoint:
return loopPoint
return None
def getExtendedAttribute(self, name):
return self._extendedAttrDict.get(name, None)
def setNonPartial(self, location, parent, members):
assert not parent or isinstance(parent, IDLIdentifierPlaceholder)
if not self._isPartial:
raise WebIDLError("Two non-partial definitions for the "
"same interface",
[location, self.location])
self._isPartial = False
# Now make it look like we were parsed at this new location, since
# that's the place where the interface is "really" defined
self.location = location
assert not self.parent
self.parent = parent
# Put the new members at the beginning
self.members = members + self.members
def getJSImplementation(self):
classId = self.getExtendedAttribute("JSImplementation")
if not classId:
return classId
assert isinstance(classId, list)
assert len(classId) == 1
return classId[0]
def isJSImplemented(self):
return bool(self.getJSImplementation())
def getNavigatorProperty(self):
naviProp = self.getExtendedAttribute("NavigatorProperty")
if not naviProp:
return None
assert len(naviProp) == 1
assert isinstance(naviProp, list)
assert len(naviProp[0]) != 0
return naviProp[0]
def hasChildInterfaces(self):
return self._hasChildInterfaces
def isOnGlobalProtoChain(self):
return self._isOnGlobalProtoChain
def _getDependentObjects(self):
deps = set(self.members)
deps.union(self.implementedInterfaces)
if self.parent:
deps.add(self.parent)
return deps
def hasMembersInSlots(self):
return self._ownMembersInSlots != 0
class IDLDictionary(IDLObjectWithScope):
def __init__(self, location, parentScope, name, parent, members):
assert isinstance(parentScope, IDLScope)
assert isinstance(name, IDLUnresolvedIdentifier)
assert not parent or isinstance(parent, IDLIdentifierPlaceholder)
self.parent = parent
self._finished = False
self.members = list(members)
IDLObjectWithScope.__init__(self, location, parentScope, name)
def __str__(self):
return "Dictionary '%s'" % self.identifier.name
def isDictionary(self):
return True;
def finish(self, scope):
if self._finished:
return
self._finished = True
if self.parent:
assert isinstance(self.parent, IDLIdentifierPlaceholder)
oldParent = self.parent
self.parent = self.parent.finish(scope)
if not isinstance(self.parent, IDLDictionary):
raise WebIDLError("Dictionary %s has parent that is not a dictionary" %
self.identifier.name,
[oldParent.location, self.parent.location])
# Make sure the parent resolves all its members before we start
# looking at them.
self.parent.finish(scope)
for member in self.members:
member.resolve(self)
if not member.isComplete():
member.complete(scope)
assert member.type.isComplete()
# Members of a dictionary are sorted in lexicographic order
self.members.sort(cmp=cmp, key=lambda x: x.identifier.name)
inheritedMembers = []
ancestor = self.parent
while ancestor:
if ancestor == self:
raise WebIDLError("Dictionary %s has itself as an ancestor" %
self.identifier.name,
[self.identifier.location])
inheritedMembers.extend(ancestor.members)
ancestor = ancestor.parent
# Catch name duplication
for inheritedMember in inheritedMembers:
for member in self.members:
if member.identifier.name == inheritedMember.identifier.name:
raise WebIDLError("Dictionary %s has two members with name %s" %
(self.identifier.name, member.identifier.name),
[member.location, inheritedMember.location])
def validate(self):
def typeContainsDictionary(memberType, dictionary):
"""
Returns a tuple whose:
- First element is a Boolean value indicating whether
memberType contains dictionary.
- Second element is:
A list of locations that leads from the type that was passed in
the memberType argument, to the dictionary being validated,
if the boolean value in the first element is True.
None, if the boolean value in the first element is False.
"""
if memberType.nullable() or \
memberType.isArray() or \
memberType.isSequence():
return typeContainsDictionary(memberType.inner, dictionary)
if memberType.isDictionary():
if memberType.inner == dictionary:
return (True, [memberType.location])
(contains, locations) = dictionaryContainsDictionary(memberType.inner, \
dictionary)
if contains:
return (True, [memberType.location] + locations)
if memberType.isUnion():
for member in memberType.flatMemberTypes:
(contains, locations) = typeContainsDictionary(member, dictionary)
if contains:
return (True, locations)
return (False, None)
def dictionaryContainsDictionary(dictMember, dictionary):
for member in dictMember.members:
(contains, locations) = typeContainsDictionary(member.type, dictionary)
if contains:
return (True, [member.location] + locations)
if dictMember.parent:
if dictMember.parent == dictionary:
return (True, [dictMember.location])
else:
(contains, locations) = dictionaryContainsDictionary(dictMember.parent, dictionary)
if contains:
return (True, [dictMember.location] + locations)
return (False, None)
for member in self.members:
if member.type.isDictionary() and member.type.nullable():
raise WebIDLError("Dictionary %s has member with nullable "
"dictionary type" % self.identifier.name,
[member.location])
(contains, locations) = typeContainsDictionary(member.type, self)
if contains:
raise WebIDLError("Dictionary %s has member with itself as type." %
self.identifier.name,
[member.location] + locations)
def addExtendedAttributes(self, attrs):
assert len(attrs) == 0
def _getDependentObjects(self):
deps = set(self.members)
if (self.parent):
deps.add(self.parent)
return deps
class IDLEnum(IDLObjectWithIdentifier):
def __init__(self, location, parentScope, name, values):
assert isinstance(parentScope, IDLScope)
assert isinstance(name, IDLUnresolvedIdentifier)
if len(values) != len(set(values)):
raise WebIDLError("Enum %s has multiple identical strings" % name.name,
[location])
IDLObjectWithIdentifier.__init__(self, location, parentScope, name)
self._values = values
def values(self):
return self._values
def finish(self, scope):
pass
def validate(self):
pass
def isEnum(self):
return True
def addExtendedAttributes(self, attrs):
assert len(attrs) == 0
def _getDependentObjects(self):
return set()
class IDLType(IDLObject):
Tags = enum(
# The integer types
'int8',
'uint8',
'int16',
'uint16',
'int32',
'uint32',
'int64',
'uint64',
# Additional primitive types
'bool',
'unrestricted_float',
'float',
'unrestricted_double',
# "double" last primitive type to match IDLBuiltinType
'double',
# Other types
'any',
'domstring',
'bytestring',
'object',
'date',
'void',
# Funny stuff
'interface',
'dictionary',
'enum',
'callback',
'union',
'sequence',
'array'
)
def __init__(self, location, name):
IDLObject.__init__(self, location)
self.name = name
self.builtin = False
def __eq__(self, other):
return other and self.builtin == other.builtin and self.name == other.name
def __ne__(self, other):
return not self == other
def __str__(self):
return str(self.name)
def isType(self):
return True
def nullable(self):
return False
def isPrimitive(self):
return False
def isBoolean(self):
return False
def isNumeric(self):
return False
def isString(self):
return False
def isByteString(self):
return False
def isDOMString(self):
return False
def isVoid(self):
return self.name == "Void"
def isSequence(self):
return False
def isArray(self):
return False
def isArrayBuffer(self):
return False
def isArrayBufferView(self):
return False
def isTypedArray(self):
return False
def isCallbackInterface(self):
return False
def isNonCallbackInterface(self):
return False
def isGeckoInterface(self):
""" Returns a boolean indicating whether this type is an 'interface'
type that is implemented in Gecko. At the moment, this returns
true for all interface types that are not types from the TypedArray
spec."""
return self.isInterface() and not self.isSpiderMonkeyInterface()
def isSpiderMonkeyInterface(self):
""" Returns a boolean indicating whether this type is an 'interface'
type that is implemented in Spidermonkey. At the moment, this
only returns true for the types from the TypedArray spec. """
return self.isInterface() and (self.isArrayBuffer() or \
self.isArrayBufferView() or \
self.isTypedArray())
def isDictionary(self):
return False
def isInterface(self):
return False
def isAny(self):
return self.tag() == IDLType.Tags.any
def isDate(self):
return self.tag() == IDLType.Tags.date
def isObject(self):
return self.tag() == IDLType.Tags.object
def isComplete(self):
return True
def includesRestrictedFloat(self):
return False
def isFloat(self):
return False
def isUnrestricted(self):
# Should only call this on float types
assert self.isFloat()
def isSerializable(self):
return False
def tag(self):
assert False # Override me!
def treatNonCallableAsNull(self):
assert self.tag() == IDLType.Tags.callback
return self.nullable() and self.inner._treatNonCallableAsNull
def treatNonObjectAsNull(self):
assert self.tag() == IDLType.Tags.callback
return self.nullable() and self.inner._treatNonObjectAsNull
def addExtendedAttributes(self, attrs):
assert len(attrs) == 0
def resolveType(self, parentScope):
pass
def unroll(self):
return self
def isDistinguishableFrom(self, other):
raise TypeError("Can't tell whether a generic type is or is not "
"distinguishable from other things")
class IDLUnresolvedType(IDLType):
"""
Unresolved types are interface types
"""
def __init__(self, location, name):
IDLType.__init__(self, location, name)
def isComplete(self):
return False
def complete(self, scope):
obj = None
try:
obj = scope._lookupIdentifier(self.name)
except:
raise WebIDLError("Unresolved type '%s'." % self.name,
[self.location])
assert obj
if obj.isType():
# obj itself might not be complete; deal with that.
assert obj != self
if not obj.isComplete():
obj = obj.complete(scope)
return obj
name = self.name.resolve(scope, None)
return IDLWrapperType(self.location, obj)
def isDistinguishableFrom(self, other):
raise TypeError("Can't tell whether an unresolved type is or is not "
"distinguishable from other things")
class IDLNullableType(IDLType):
def __init__(self, location, innerType):
assert not innerType.isVoid()
assert not innerType == BuiltinTypes[IDLBuiltinType.Types.any]
IDLType.__init__(self, location, innerType.name)
self.inner = innerType
self.builtin = False
def __eq__(self, other):
return isinstance(other, IDLNullableType) and self.inner == other.inner
def __str__(self):
return self.inner.__str__() + "OrNull"
def nullable(self):
return True
def isCallback(self):
return self.inner.isCallback()
def isPrimitive(self):
return self.inner.isPrimitive()
def isBoolean(self):
return self.inner.isBoolean()
def isNumeric(self):
return self.inner.isNumeric()
def isString(self):
return self.inner.isString()
def isByteString(self):
return self.inner.isByteString()
def isDOMString(self):
return self.inner.isDOMString()
def isFloat(self):
return self.inner.isFloat()
def isUnrestricted(self):
return self.inner.isUnrestricted()
def includesRestrictedFloat(self):
return self.inner.includesRestrictedFloat()
def isInteger(self):
return self.inner.isInteger()
def isVoid(self):
return False
def isSequence(self):
return self.inner.isSequence()
def isArray(self):
return self.inner.isArray()
def isArrayBuffer(self):
return self.inner.isArrayBuffer()
def isArrayBufferView(self):
return self.inner.isArrayBufferView()
def isTypedArray(self):
return self.inner.isTypedArray()
def isDictionary(self):
return self.inner.isDictionary()
def isInterface(self):
return self.inner.isInterface()
def isCallbackInterface(self):
return self.inner.isCallbackInterface()
def isNonCallbackInterface(self):
return self.inner.isNonCallbackInterface()
def isEnum(self):
return self.inner.isEnum()
def isUnion(self):
return self.inner.isUnion()
def isSerializable(self):
return self.inner.isSerializable()
def tag(self):
return self.inner.tag()
def resolveType(self, parentScope):
assert isinstance(parentScope, IDLScope)
self.inner.resolveType(parentScope)
def isComplete(self):
return self.inner.isComplete()
def complete(self, scope):
self.inner = self.inner.complete(scope)
if self.inner.nullable():
raise WebIDLError("The inner type of a nullable type must not be "
"a nullable type",
[self.location, self.inner.location])
if self.inner.isUnion():
if self.inner.hasNullableType:
raise WebIDLError("The inner type of a nullable type must not "
"be a union type that itself has a nullable "
"type as a member type", [self.location])
self.name = self.inner.name
return self
def unroll(self):
return self.inner.unroll()
def isDistinguishableFrom(self, other):
if (other.nullable() or (other.isUnion() and other.hasNullableType) or
other.isDictionary()):
# Can't tell which type null should become
return False
return self.inner.isDistinguishableFrom(other)
def _getDependentObjects(self):
return self.inner._getDependentObjects()
class IDLSequenceType(IDLType):
def __init__(self, location, parameterType):
assert not parameterType.isVoid()
IDLType.__init__(self, location, parameterType.name)
self.inner = parameterType
self.builtin = False
def __eq__(self, other):
return isinstance(other, IDLSequenceType) and self.inner == other.inner
def __str__(self):
return self.inner.__str__() + "Sequence"
def nullable(self):
return False
def isPrimitive(self):
return False;
def isString(self):
return False;
def isByteString(self):
return False
def isDOMString(self):
return False
def isVoid(self):
return False
def isSequence(self):
return True
def isArray(self):
return False
def isDictionary(self):
return False
def isInterface(self):
return False
def isEnum(self):
return False
def isSerializable(self):
return self.inner.isSerializable()
def includesRestrictedFloat(self):
return self.inner.includesRestrictedFloat()
def tag(self):
return IDLType.Tags.sequence
def resolveType(self, parentScope):
assert isinstance(parentScope, IDLScope)
self.inner.resolveType(parentScope)
def isComplete(self):
return self.inner.isComplete()
def complete(self, scope):
self.inner = self.inner.complete(scope)
self.name = self.inner.name
return self
def unroll(self):
return self.inner.unroll()
def isDistinguishableFrom(self, other):
if other.isUnion():
# Just forward to the union; it'll deal
return other.isDistinguishableFrom(self)
return (other.isPrimitive() or other.isString() or other.isEnum() or
other.isDate() or other.isNonCallbackInterface())
def _getDependentObjects(self):
return self.inner._getDependentObjects()
class IDLUnionType(IDLType):
def __init__(self, location, memberTypes):
IDLType.__init__(self, location, "")
self.memberTypes = memberTypes
self.hasNullableType = False
self.hasDictionaryType = False
self.flatMemberTypes = None
self.builtin = False
def __eq__(self, other):
return isinstance(other, IDLUnionType) and self.memberTypes == other.memberTypes
def isVoid(self):
return False
def isUnion(self):
return True
def isSerializable(self):
return all(m.isSerializable() for m in self.memberTypes)
def includesRestrictedFloat(self):
return any(t.includesRestrictedFloat() for t in self.memberTypes)
def tag(self):
return IDLType.Tags.union
def resolveType(self, parentScope):
assert isinstance(parentScope, IDLScope)
for t in self.memberTypes:
t.resolveType(parentScope)
def isComplete(self):
return self.flatMemberTypes is not None
def complete(self, scope):
def typeName(type):
if isinstance(type, IDLNullableType):
return typeName(type.inner) + "OrNull"
if isinstance(type, IDLWrapperType):
return typeName(type._identifier.object())
if isinstance(type, IDLObjectWithIdentifier):
return typeName(type.identifier)
if isinstance(type, IDLType) and (type.isArray() or type.isSequence()):
return str(type)
return type.name
for (i, type) in enumerate(self.memberTypes):
if not type.isComplete():
self.memberTypes[i] = type.complete(scope)
self.name = "Or".join(typeName(type) for type in self.memberTypes)
self.flatMemberTypes = list(self.memberTypes)
i = 0
while i < len(self.flatMemberTypes):
if self.flatMemberTypes[i].nullable():
if self.hasNullableType:
raise WebIDLError("Can't have more than one nullable types in a union",
[nullableType.location, self.flatMemberTypes[i].location])
if self.hasDictionaryType:
raise WebIDLError("Can't have a nullable type and a "
"dictionary type in a union",
[dictionaryType.location,
self.flatMemberTypes[i].location])
self.hasNullableType = True
nullableType = self.flatMemberTypes[i]
self.flatMemberTypes[i] = self.flatMemberTypes[i].inner
continue
if self.flatMemberTypes[i].isDictionary():
if self.hasNullableType:
raise WebIDLError("Can't have a nullable type and a "
"dictionary type in a union",
[nullableType.location,
self.flatMemberTypes[i].location])
self.hasDictionaryType = True
dictionaryType = self.flatMemberTypes[i]
elif self.flatMemberTypes[i].isUnion():
self.flatMemberTypes[i:i + 1] = self.flatMemberTypes[i].memberTypes
continue
i += 1
for (i, t) in enumerate(self.flatMemberTypes[:-1]):
for u in self.flatMemberTypes[i + 1:]:
if not t.isDistinguishableFrom(u):
raise WebIDLError("Flat member types of a union should be "
"distinguishable, " + str(t) + " is not "
"distinguishable from " + str(u),
[self.location, t.location, u.location])
return self
def isDistinguishableFrom(self, other):
if self.hasNullableType and other.nullable():
# Can't tell which type null should become
return False
if other.isUnion():
otherTypes = other.unroll().memberTypes
else:
otherTypes = [other]
# For every type in otherTypes, check that it's distinguishable from
# every type in our types
for u in otherTypes:
if any(not t.isDistinguishableFrom(u) for t in self.memberTypes):
return False
return True
def _getDependentObjects(self):
return set(self.memberTypes)
class IDLArrayType(IDLType):
def __init__(self, location, parameterType):
assert not parameterType.isVoid()
if parameterType.isSequence():
raise WebIDLError("Array type cannot parameterize over a sequence type",
[location])
if parameterType.isDictionary():
raise WebIDLError("Array type cannot parameterize over a dictionary type",
[location])
IDLType.__init__(self, location, parameterType.name)
self.inner = parameterType
self.builtin = False
def __eq__(self, other):
return isinstance(other, IDLArrayType) and self.inner == other.inner
def __str__(self):
return self.inner.__str__() + "Array"
def nullable(self):
return False
def isPrimitive(self):
return False
def isString(self):
return False
def isByteString(self):
return False
def isDOMString(self):
return False
def isVoid(self):
return False
def isSequence(self):
assert not self.inner.isSequence()
return False
def isArray(self):
return True
def isDictionary(self):
assert not self.inner.isDictionary()
return False
def isInterface(self):
return False
def isEnum(self):
return False
def tag(self):
return IDLType.Tags.array
def resolveType(self, parentScope):
assert isinstance(parentScope, IDLScope)
self.inner.resolveType(parentScope)
def isComplete(self):
return self.inner.isComplete()
def complete(self, scope):
self.inner = self.inner.complete(scope)
self.name = self.inner.name
if self.inner.isDictionary():
raise WebIDLError("Array type must not contain "
"dictionary as element type.",
[self.inner.location])
assert not self.inner.isSequence()
return self
def unroll(self):
return self.inner.unroll()
def isDistinguishableFrom(self, other):
if other.isUnion():
# Just forward to the union; it'll deal
return other.isDistinguishableFrom(self)
return (other.isPrimitive() or other.isString() or other.isEnum() or
other.isDate() or other.isNonCallbackInterface())
def _getDependentObjects(self):
return self.inner._getDependentObjects()
class IDLTypedefType(IDLType, IDLObjectWithIdentifier):
def __init__(self, location, innerType, name):
IDLType.__init__(self, location, innerType.name)
identifier = IDLUnresolvedIdentifier(location, name)
IDLObjectWithIdentifier.__init__(self, location, None, identifier)
self.inner = innerType
self.name = name
self.builtin = False
def __eq__(self, other):
return isinstance(other, IDLTypedefType) and self.inner == other.inner
def __str__(self):
return self.identifier.name
def nullable(self):
return self.inner.nullable()
def isPrimitive(self):
return self.inner.isPrimitive()
def isBoolean(self):
return self.inner.isBoolean()
def isNumeric(self):
return self.inner.isNumeric()
def isString(self):
return self.inner.isString()
def isByteString(self):
return self.inner.isByteString()
def isDOMString(self):
return self.inner.isDOMString()
def isVoid(self):
return self.inner.isVoid()
def isSequence(self):
return self.inner.isSequence()
def isArray(self):
return self.inner.isArray()
def isDictionary(self):
return self.inner.isDictionary()
def isArrayBuffer(self):
return self.inner.isArrayBuffer()
def isArrayBufferView(self):
return self.inner.isArrayBufferView()
def isTypedArray(self):
return self.inner.isTypedArray()
def isInterface(self):
return self.inner.isInterface()
def isCallbackInterface(self):
return self.inner.isCallbackInterface()
def isNonCallbackInterface(self):
return self.inner.isNonCallbackInterface()
def isComplete(self):
return False
def complete(self, parentScope):
if not self.inner.isComplete():
self.inner = self.inner.complete(parentScope)
assert self.inner.isComplete()
return self.inner
def finish(self, parentScope):
# Maybe the IDLObjectWithIdentifier for the typedef should be
# a separate thing from the type? If that happens, we can
# remove some hackery around avoiding isInterface() in
# Configuration.py.
self.complete(parentScope)
def validate(self):
pass
# Do we need a resolveType impl? I don't think it's particularly useful....
def tag(self):
return self.inner.tag()
def unroll(self):
return self.inner.unroll()
def isDistinguishableFrom(self, other):
return self.inner.isDistinguishableFrom(other)
def _getDependentObjects(self):
return self.inner._getDependentObjects()
class IDLWrapperType(IDLType):
def __init__(self, location, inner):
IDLType.__init__(self, location, inner.identifier.name)
self.inner = inner
self._identifier = inner.identifier
self.builtin = False
def __eq__(self, other):
return isinstance(other, IDLWrapperType) and \
self._identifier == other._identifier and \
self.builtin == other.builtin
def __str__(self):
return str(self.name) + " (Wrapper)"
def nullable(self):
return False
def isPrimitive(self):
return False
def isString(self):
return False
def isByteString(self):
return False
def isDOMString(self):
return False
def isVoid(self):
return False
def isSequence(self):
return False
def isArray(self):
return False
def isDictionary(self):
return isinstance(self.inner, IDLDictionary)
def isInterface(self):
return isinstance(self.inner, IDLInterface) or \
isinstance(self.inner, IDLExternalInterface)
def isCallbackInterface(self):
return self.isInterface() and self.inner.isCallback()
def isNonCallbackInterface(self):
return self.isInterface() and not self.inner.isCallback()
def isEnum(self):
return isinstance(self.inner, IDLEnum)
def isSerializable(self):
if self.isInterface():
if self.inner.isExternal():
return False
return any(m.isMethod() and m.isJsonifier() for m in self.inner.members)
elif self.isEnum():
return True
elif self.isDictionary():
return all(m.type.isSerializable() for m in self.inner.members)
else:
raise WebIDLError("IDLWrapperType wraps type %s that we don't know if "
"is serializable" % type(self.inner), [self.location])
def resolveType(self, parentScope):
assert isinstance(parentScope, IDLScope)
self.inner.resolve(parentScope)
def isComplete(self):
return True
def tag(self):
if self.isInterface():
return IDLType.Tags.interface
elif self.isEnum():
return IDLType.Tags.enum
elif self.isDictionary():
return IDLType.Tags.dictionary
else:
assert False
def isDistinguishableFrom(self, other):
if other.isUnion():
# Just forward to the union; it'll deal
return other.isDistinguishableFrom(self)
assert self.isInterface() or self.isEnum() or self.isDictionary()
if self.isEnum():
return (other.isPrimitive() or other.isInterface() or other.isObject() or
other.isCallback() or other.isDictionary() or
other.isSequence() or other.isArray() or
other.isDate())
if self.isDictionary() and other.nullable():
return False
if other.isPrimitive() or other.isString() or other.isEnum() or other.isDate():
return True
if self.isDictionary():
return other.isNonCallbackInterface()
assert self.isInterface()
if other.isInterface():
if other.isSpiderMonkeyInterface():
# Just let |other| handle things
return other.isDistinguishableFrom(self)
assert self.isGeckoInterface() and other.isGeckoInterface()
if self.inner.isExternal() or other.unroll().inner.isExternal():
return self != other
return (len(self.inner.interfacesBasedOnSelf &
other.unroll().inner.interfacesBasedOnSelf) == 0 and
(self.isNonCallbackInterface() or
other.isNonCallbackInterface()))
if (other.isDictionary() or other.isCallback() or
other.isSequence() or other.isArray()):
return self.isNonCallbackInterface()
# Not much else |other| can be
assert other.isObject()
return False
def _getDependentObjects(self):
# NB: The codegen for an interface type depends on
# a) That the identifier is in fact an interface (as opposed to
# a dictionary or something else).
# b) The native type of the interface.
# If we depend on the interface object we will also depend on
# anything the interface depends on which is undesirable. We
# considered implementing a dependency just on the interface type
# file, but then every modification to an interface would cause this
# to be regenerated which is still undesirable. We decided not to
# depend on anything, reasoning that:
# 1) Changing the concrete type of the interface requires modifying
# Bindings.conf, which is still a global dependency.
# 2) Changing an interface to a dictionary (or vice versa) with the
# same identifier should be incredibly rare.
return set()
class IDLBuiltinType(IDLType):
Types = enum(
# The integer types
'byte',
'octet',
'short',
'unsigned_short',
'long',
'unsigned_long',
'long_long',
'unsigned_long_long',
# Additional primitive types
'boolean',
'unrestricted_float',
'float',
'unrestricted_double',
# IMPORTANT: "double" must be the last primitive type listed
'double',
# Other types
'any',
'domstring',
'bytestring',
'object',
'date',
'void',
# Funny stuff
'ArrayBuffer',
'ArrayBufferView',
'Int8Array',
'Uint8Array',
'Uint8ClampedArray',
'Int16Array',
'Uint16Array',
'Int32Array',
'Uint32Array',
'Float32Array',
'Float64Array'
)
TagLookup = {
Types.byte: IDLType.Tags.int8,
Types.octet: IDLType.Tags.uint8,
Types.short: IDLType.Tags.int16,
Types.unsigned_short: IDLType.Tags.uint16,
Types.long: IDLType.Tags.int32,
Types.unsigned_long: IDLType.Tags.uint32,
Types.long_long: IDLType.Tags.int64,
Types.unsigned_long_long: IDLType.Tags.uint64,
Types.boolean: IDLType.Tags.bool,
Types.unrestricted_float: IDLType.Tags.unrestricted_float,
Types.float: IDLType.Tags.float,
Types.unrestricted_double: IDLType.Tags.unrestricted_double,
Types.double: IDLType.Tags.double,
Types.any: IDLType.Tags.any,
Types.domstring: IDLType.Tags.domstring,
Types.bytestring: IDLType.Tags.bytestring,
Types.object: IDLType.Tags.object,
Types.date: IDLType.Tags.date,
Types.void: IDLType.Tags.void,
Types.ArrayBuffer: IDLType.Tags.interface,
Types.ArrayBufferView: IDLType.Tags.interface,
Types.Int8Array: IDLType.Tags.interface,
Types.Uint8Array: IDLType.Tags.interface,
Types.Uint8ClampedArray: IDLType.Tags.interface,
Types.Int16Array: IDLType.Tags.interface,
Types.Uint16Array: IDLType.Tags.interface,
Types.Int32Array: IDLType.Tags.interface,
Types.Uint32Array: IDLType.Tags.interface,
Types.Float32Array: IDLType.Tags.interface,
Types.Float64Array: IDLType.Tags.interface
}
def __init__(self, location, name, type):
IDLType.__init__(self, location, name)
self.builtin = True
self._typeTag = type
def isPrimitive(self):
return self._typeTag <= IDLBuiltinType.Types.double
def isBoolean(self):
return self._typeTag == IDLBuiltinType.Types.boolean
def isNumeric(self):
return self.isPrimitive() and not self.isBoolean()
def isString(self):
return self._typeTag == IDLBuiltinType.Types.domstring or \
self._typeTag == IDLBuiltinType.Types.bytestring
def isByteString(self):
return self._typeTag == IDLBuiltinType.Types.bytestring
def isDOMString(self):
return self._typeTag == IDLBuiltinType.Types.domstring
def isInteger(self):
return self._typeTag <= IDLBuiltinType.Types.unsigned_long_long
def isArrayBuffer(self):
return self._typeTag == IDLBuiltinType.Types.ArrayBuffer
def isArrayBufferView(self):
return self._typeTag == IDLBuiltinType.Types.ArrayBufferView
def isTypedArray(self):
return self._typeTag >= IDLBuiltinType.Types.Int8Array and \
self._typeTag <= IDLBuiltinType.Types.Float64Array
def isInterface(self):
# TypedArray things are interface types per the TypedArray spec,
# but we handle them as builtins because SpiderMonkey implements
# all of it internally.
return self.isArrayBuffer() or \
self.isArrayBufferView() or \
self.isTypedArray()
def isNonCallbackInterface(self):
# All the interfaces we can be are non-callback
return self.isInterface()
def isFloat(self):
return self._typeTag == IDLBuiltinType.Types.float or \
self._typeTag == IDLBuiltinType.Types.double or \
self._typeTag == IDLBuiltinType.Types.unrestricted_float or \
self._typeTag == IDLBuiltinType.Types.unrestricted_double
def isUnrestricted(self):
assert self.isFloat()
return self._typeTag == IDLBuiltinType.Types.unrestricted_float or \
self._typeTag == IDLBuiltinType.Types.unrestricted_double
def isSerializable(self):
return self.isPrimitive() or self.isDOMString() or self.isDate()
def includesRestrictedFloat(self):
return self.isFloat() and not self.isUnrestricted()
def tag(self):
return IDLBuiltinType.TagLookup[self._typeTag]
def isDistinguishableFrom(self, other):
if other.isUnion():
# Just forward to the union; it'll deal
return other.isDistinguishableFrom(self)
if self.isBoolean():
return (other.isNumeric() or other.isString() or other.isEnum() or
other.isInterface() or other.isObject() or
other.isCallback() or other.isDictionary() or
other.isSequence() or other.isArray() or
other.isDate())
if self.isNumeric():
return (other.isBoolean() or other.isString() or other.isEnum() or
other.isInterface() or other.isObject() or
other.isCallback() or other.isDictionary() or
other.isSequence() or other.isArray() or
other.isDate())
if self.isString():
return (other.isPrimitive() or other.isInterface() or
other.isObject() or
other.isCallback() or other.isDictionary() or
other.isSequence() or other.isArray() or
other.isDate())
if self.isAny():
# Can't tell "any" apart from anything
return False
if self.isObject():
return other.isPrimitive() or other.isString() or other.isEnum()
if self.isDate():
return (other.isPrimitive() or other.isString() or other.isEnum() or
other.isInterface() or other.isCallback() or
other.isDictionary() or other.isSequence() or
other.isArray())
if self.isVoid():
return not other.isVoid()
# Not much else we could be!
assert self.isSpiderMonkeyInterface()
# Like interfaces, but we know we're not a callback
return (other.isPrimitive() or other.isString() or other.isEnum() or
other.isCallback() or other.isDictionary() or
other.isSequence() or other.isArray() or other.isDate() or
(other.isInterface() and (
# ArrayBuffer is distinguishable from everything
# that's not an ArrayBuffer or a callback interface
(self.isArrayBuffer() and not other.isArrayBuffer()) or
# ArrayBufferView is distinguishable from everything
# that's not an ArrayBufferView or typed array.
(self.isArrayBufferView() and not other.isArrayBufferView() and
not other.isTypedArray()) or
# Typed arrays are distinguishable from everything
# except ArrayBufferView and the same type of typed
# array
(self.isTypedArray() and not other.isArrayBufferView() and not
(other.isTypedArray() and other.name == self.name)))))
def _getDependentObjects(self):
return set()
BuiltinTypes = {
IDLBuiltinType.Types.byte:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Byte",
IDLBuiltinType.Types.byte),
IDLBuiltinType.Types.octet:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Octet",
IDLBuiltinType.Types.octet),
IDLBuiltinType.Types.short:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Short",
IDLBuiltinType.Types.short),
IDLBuiltinType.Types.unsigned_short:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "UnsignedShort",
IDLBuiltinType.Types.unsigned_short),
IDLBuiltinType.Types.long:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Long",
IDLBuiltinType.Types.long),
IDLBuiltinType.Types.unsigned_long:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "UnsignedLong",
IDLBuiltinType.Types.unsigned_long),
IDLBuiltinType.Types.long_long:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "LongLong",
IDLBuiltinType.Types.long_long),
IDLBuiltinType.Types.unsigned_long_long:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "UnsignedLongLong",
IDLBuiltinType.Types.unsigned_long_long),
IDLBuiltinType.Types.boolean:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Boolean",
IDLBuiltinType.Types.boolean),
IDLBuiltinType.Types.float:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Float",
IDLBuiltinType.Types.float),
IDLBuiltinType.Types.unrestricted_float:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "UnrestrictedFloat",
IDLBuiltinType.Types.unrestricted_float),
IDLBuiltinType.Types.double:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Double",
IDLBuiltinType.Types.double),
IDLBuiltinType.Types.unrestricted_double:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "UnrestrictedDouble",
IDLBuiltinType.Types.unrestricted_double),
IDLBuiltinType.Types.any:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Any",
IDLBuiltinType.Types.any),
IDLBuiltinType.Types.domstring:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "String",
IDLBuiltinType.Types.domstring),
IDLBuiltinType.Types.bytestring:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "ByteString",
IDLBuiltinType.Types.bytestring),
IDLBuiltinType.Types.object:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Object",
IDLBuiltinType.Types.object),
IDLBuiltinType.Types.date:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Date",
IDLBuiltinType.Types.date),
IDLBuiltinType.Types.void:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Void",
IDLBuiltinType.Types.void),
IDLBuiltinType.Types.ArrayBuffer:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "ArrayBuffer",
IDLBuiltinType.Types.ArrayBuffer),
IDLBuiltinType.Types.ArrayBufferView:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "ArrayBufferView",
IDLBuiltinType.Types.ArrayBufferView),
IDLBuiltinType.Types.Int8Array:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Int8Array",
IDLBuiltinType.Types.Int8Array),
IDLBuiltinType.Types.Uint8Array:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Uint8Array",
IDLBuiltinType.Types.Uint8Array),
IDLBuiltinType.Types.Uint8ClampedArray:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Uint8ClampedArray",
IDLBuiltinType.Types.Uint8ClampedArray),
IDLBuiltinType.Types.Int16Array:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Int16Array",
IDLBuiltinType.Types.Int16Array),
IDLBuiltinType.Types.Uint16Array:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Uint16Array",
IDLBuiltinType.Types.Uint16Array),
IDLBuiltinType.Types.Int32Array:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Int32Array",
IDLBuiltinType.Types.Int32Array),
IDLBuiltinType.Types.Uint32Array:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Uint32Array",
IDLBuiltinType.Types.Uint32Array),
IDLBuiltinType.Types.Float32Array:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Float32Array",
IDLBuiltinType.Types.Float32Array),
IDLBuiltinType.Types.Float64Array:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Float64Array",
IDLBuiltinType.Types.Float64Array)
}
integerTypeSizes = {
IDLBuiltinType.Types.byte: (-128, 127),
IDLBuiltinType.Types.octet: (0, 255),
IDLBuiltinType.Types.short: (-32768, 32767),
IDLBuiltinType.Types.unsigned_short: (0, 65535),
IDLBuiltinType.Types.long: (-2147483648, 2147483647),
IDLBuiltinType.Types.unsigned_long: (0, 4294967295),
IDLBuiltinType.Types.long_long: (-9223372036854775808,
9223372036854775807),
IDLBuiltinType.Types.unsigned_long_long: (0, 18446744073709551615)
}
def matchIntegerValueToType(value):
for type, extremes in integerTypeSizes.items():
(min, max) = extremes
if value <= max and value >= min:
return BuiltinTypes[type]
return None
class IDLValue(IDLObject):
def __init__(self, location, type, value):
IDLObject.__init__(self, location)
self.type = type
assert isinstance(type, IDLType)
self.value = value
def coerceToType(self, type, location):
if type == self.type:
return self # Nothing to do
# We first check for unions to ensure that even if the union is nullable
# we end up with the right flat member type, not the union's type.
if type.isUnion():
# We use the flat member types here, because if we have a nullable
# member type, or a nested union, we want the type the value
# actually coerces to, not the nullable or nested union type.
for subtype in type.unroll().flatMemberTypes:
try:
coercedValue = self.coerceToType(subtype, location)
# Create a new IDLValue to make sure that we have the
# correct float/double type. This is necessary because we
# use the value's type when it is a default value of a
# union, and the union cares about the exact float type.
return IDLValue(self.location, subtype, coercedValue.value)
except:
pass
# If the type allows null, rerun this matching on the inner type, except
# nullable enums. We handle those specially, because we want our
# default string values to stay strings even when assigned to a nullable
# enum.
elif type.nullable() and not type.isEnum():
innerValue = self.coerceToType(type.inner, location)
return IDLValue(self.location, type, innerValue.value)
elif self.type.isInteger() and type.isInteger():
# We're both integer types. See if we fit.
(min, max) = integerTypeSizes[type._typeTag]
if self.value <= max and self.value >= min:
# Promote
return IDLValue(self.location, type, self.value)
else:
raise WebIDLError("Value %s is out of range for type %s." %
(self.value, type), [location])
elif self.type.isInteger() and type.isFloat():
# Convert an integer literal into float
if -2**24 <= self.value <= 2**24:
floatType = BuiltinTypes[IDLBuiltinType.Types.float]
return IDLValue(self.location, floatType, float(self.value))
else:
raise WebIDLError("Converting value %s to %s will lose precision." %
(self.value, type), [location])
elif self.type.isString() and type.isEnum():
# Just keep our string, but make sure it's a valid value for this enum
enum = type.unroll().inner
if self.value not in enum.values():
raise WebIDLError("'%s' is not a valid default value for enum %s"
% (self.value, enum.identifier.name),
[location, enum.location])
return self
elif self.type.isFloat() and type.isFloat():
if (not type.isUnrestricted() and
(self.value == float("inf") or self.value == float("-inf") or
math.isnan(self.value))):
raise WebIDLError("Trying to convert unrestricted value %s to non-unrestricted"
% self.value, [location]);
return self
raise WebIDLError("Cannot coerce type %s to type %s." %
(self.type, type), [location])
def _getDependentObjects(self):
return set()
class IDLNullValue(IDLObject):
def __init__(self, location):
IDLObject.__init__(self, location)
self.type = None
self.value = None
def coerceToType(self, type, location):
if (not isinstance(type, IDLNullableType) and
not (type.isUnion() and type.hasNullableType) and
not (type.isUnion() and type.hasDictionaryType) and
not type.isDictionary() and
not type.isAny()):
raise WebIDLError("Cannot coerce null value to type %s." % type,
[location])
nullValue = IDLNullValue(self.location)
if type.isUnion() and not type.nullable() and type.hasDictionaryType:
# We're actually a default value for the union's dictionary member.
# Use its type.
for t in type.flatMemberTypes:
if t.isDictionary():
nullValue.type = t
return nullValue
nullValue.type = type
return nullValue
def _getDependentObjects(self):
return set()
class IDLInterfaceMember(IDLObjectWithIdentifier):
Tags = enum(
'Const',
'Attr',
'Method'
)
Special = enum(
'Static',
'Stringifier'
)
def __init__(self, location, identifier, tag):
IDLObjectWithIdentifier.__init__(self, location, None, identifier)
self.tag = tag
self._extendedAttrDict = {}
def isMethod(self):
return self.tag == IDLInterfaceMember.Tags.Method
def isAttr(self):
return self.tag == IDLInterfaceMember.Tags.Attr
def isConst(self):
return self.tag == IDLInterfaceMember.Tags.Const
def addExtendedAttributes(self, attrs):
for attr in attrs:
self.handleExtendedAttribute(attr)
attrlist = attr.listValue()
self._extendedAttrDict[attr.identifier()] = attrlist if len(attrlist) else True
def handleExtendedAttribute(self, attr):
pass
def getExtendedAttribute(self, name):
return self._extendedAttrDict.get(name, None)
class IDLConst(IDLInterfaceMember):
def __init__(self, location, identifier, type, value):
IDLInterfaceMember.__init__(self, location, identifier,
IDLInterfaceMember.Tags.Const)
assert isinstance(type, IDLType)
if type.isDictionary():
raise WebIDLError("A constant cannot be of a dictionary type",
[self.location])
self.type = type
self.value = value
if identifier.name == "prototype":
raise WebIDLError("The identifier of a constant must not be 'prototype'",
[location])
def __str__(self):
return "'%s' const '%s'" % (self.type, self.identifier)
def finish(self, scope):
if not self.type.isComplete():
type = self.type.complete(scope)
if not type.isPrimitive() and not type.isString():
locations = [self.type.location, type.location]
try:
locations.append(type.inner.location)
except:
pass
raise WebIDLError("Incorrect type for constant", locations)
self.type = type
# The value might not match the type
coercedValue = self.value.coerceToType(self.type, self.location)
assert coercedValue
self.value = coercedValue
def validate(self):
pass
def _getDependentObjects(self):
return set([self.type, self.value])
class IDLAttribute(IDLInterfaceMember):
def __init__(self, location, identifier, type, readonly, inherit=False,
static=False, stringifier=False):
IDLInterfaceMember.__init__(self, location, identifier,
IDLInterfaceMember.Tags.Attr)
assert isinstance(type, IDLType)
self.type = type
self.readonly = readonly
self.inherit = inherit
self.static = static
self.lenientThis = False
self._unforgeable = False
self.stringifier = stringifier
self.enforceRange = False
self.clamp = False
self.slotIndex = None
if static and identifier.name == "prototype":
raise WebIDLError("The identifier of a static attribute must not be 'prototype'",
[location])
if readonly and inherit:
raise WebIDLError("An attribute cannot be both 'readonly' and 'inherit'",
[self.location])
def isStatic(self):
return self.static
def __str__(self):
return "'%s' attribute '%s'" % (self.type, self.identifier)
def finish(self, scope):
if not self.type.isComplete():
t = self.type.complete(scope)
assert not isinstance(t, IDLUnresolvedType)
assert not isinstance(t, IDLTypedefType)
assert not isinstance(t.name, IDLUnresolvedIdentifier)
self.type = t
if self.type.isDictionary() and not self.getExtendedAttribute("Cached"):
raise WebIDLError("An attribute cannot be of a dictionary type",
[self.location])
if self.type.isSequence() and not self.getExtendedAttribute("Cached"):
raise WebIDLError("A non-cached attribute cannot be of a sequence "
"type", [self.location])
if self.type.isUnion():
for f in self.type.unroll().flatMemberTypes:
if f.isDictionary():
raise WebIDLError("An attribute cannot be of a union "
"type if one of its member types (or "
"one of its member types's member "
"types, and so on) is a dictionary "
"type", [self.location, f.location])
if f.isSequence():
raise WebIDLError("An attribute cannot be of a union "
"type if one of its member types (or "
"one of its member types's member "
"types, and so on) is a sequence "
"type", [self.location, f.location])
if not self.type.isInterface() and self.getExtendedAttribute("PutForwards"):
raise WebIDLError("An attribute with [PutForwards] must have an "
"interface type as its type", [self.location])
if not self.type.isInterface() and self.getExtendedAttribute("SameObject"):
raise WebIDLError("An attribute with [SameObject] must have an "
"interface type as its type", [self.location])
def validate(self):
if ((self.getExtendedAttribute("Cached") or
self.getExtendedAttribute("StoreInSlot")) and
not self.getExtendedAttribute("Constant") and
not self.getExtendedAttribute("Pure")):
raise WebIDLError("Cached attributes and attributes stored in "
"slots must be constant or pure, since the "
"getter won't always be called.",
[self.location])
if self.getExtendedAttribute("Frozen"):
if not self.type.isSequence() and not self.type.isDictionary():
raise WebIDLError("[Frozen] is only allowed on sequence-valued "
"and dictionary-valued attributes",
[self.location])
def handleExtendedAttribute(self, attr):
identifier = attr.identifier()
if identifier == "SetterThrows" and self.readonly:
raise WebIDLError("Readonly attributes must not be flagged as "
"[SetterThrows]",
[self.location])
elif (((identifier == "Throws" or identifier == "GetterThrows") and
self.getExtendedAttribute("StoreInSlot")) or
(identifier == "StoreInSlot" and
(self.getExtendedAttribute("Throws") or
self.getExtendedAttribute("GetterThrows")))):
raise WebIDLError("Throwing things can't be [Pure] or [Constant] "
"or [SameObject] or [StoreInSlot]",
[attr.location])
elif identifier == "LenientThis":
if not attr.noArguments():
raise WebIDLError("[LenientThis] must take no arguments",
[attr.location])
if self.isStatic():
raise WebIDLError("[LenientThis] is only allowed on non-static "
"attributes", [attr.location, self.location])
if self.getExtendedAttribute("CrossOriginReadable"):
raise WebIDLError("[LenientThis] is not allowed in combination "
"with [CrossOriginReadable]",
[attr.location, self.location])
if self.getExtendedAttribute("CrossOriginWritable"):
raise WebIDLError("[LenientThis] is not allowed in combination "
"with [CrossOriginWritable]",
[attr.location, self.location])
self.lenientThis = True
elif identifier == "Unforgeable":
if not self.readonly:
raise WebIDLError("[Unforgeable] is only allowed on readonly "
"attributes", [attr.location, self.location])
if self.isStatic():
raise WebIDLError("[Unforgeable] is only allowed on non-static "
"attributes", [attr.location, self.location])
self._unforgeable = True
elif identifier == "SameObject" and not self.readonly:
raise WebIDLError("[SameObject] only allowed on readonly attributes",
[attr.location, self.location])
elif identifier == "Constant" and not self.readonly:
raise WebIDLError("[Constant] only allowed on readonly attributes",
[attr.location, self.location])
elif identifier == "PutForwards":
if not self.readonly:
raise WebIDLError("[PutForwards] is only allowed on readonly "
"attributes", [attr.location, self.location])
if self.isStatic():
raise WebIDLError("[PutForwards] is only allowed on non-static "
"attributes", [attr.location, self.location])
if self.getExtendedAttribute("Replaceable") is not None:
raise WebIDLError("[PutForwards] and [Replaceable] can't both "
"appear on the same attribute",
[attr.location, self.location])
if not attr.hasValue():
raise WebIDLError("[PutForwards] takes an identifier",
[attr.location, self.location])
elif identifier == "Replaceable":
if self.getExtendedAttribute("PutForwards") is not None:
raise WebIDLError("[PutForwards] and [Replaceable] can't both "
"appear on the same attribute",
[attr.location, self.location])
elif identifier == "LenientFloat":
if self.readonly:
raise WebIDLError("[LenientFloat] used on a readonly attribute",
[attr.location, self.location])
if not self.type.includesRestrictedFloat():
raise WebIDLError("[LenientFloat] used on an attribute with a "
"non-restricted-float type",
[attr.location, self.location])
elif identifier == "EnforceRange":
if self.readonly:
raise WebIDLError("[EnforceRange] used on a readonly attribute",
[attr.location, self.location])
self.enforceRange = True
elif identifier == "Clamp":
if self.readonly:
raise WebIDLError("[Clamp] used on a readonly attribute",
[attr.location, self.location])
self.clamp = True
elif identifier == "StoreInSlot":
if self.getExtendedAttribute("Cached"):
raise WebIDLError("[StoreInSlot] and [Cached] must not be "
"specified on the same attribute",
[attr.location, self.location])
elif identifier == "Cached":
if self.getExtendedAttribute("StoreInSlot"):
raise WebIDLError("[Cached] and [StoreInSlot] must not be "
"specified on the same attribute",
[attr.location, self.location])
elif (identifier == "CrossOriginReadable" or
identifier == "CrossOriginWritable"):
if not attr.noArguments():
raise WebIDLError("[%s] must take no arguments" % identifier,
[attr.location])
if self.isStatic():
raise WebIDLError("[%s] is only allowed on non-static "
"attributes" % identifier,
[attr.location, self.location])
if self.getExtendedAttribute("LenientThis"):
raise WebIDLError("[LenientThis] is not allowed in combination "
"with [%s]" % identifier,
[attr.location, self.location])
elif (identifier == "Pref" or
identifier == "SetterThrows" or
identifier == "Pure" or
identifier == "Throws" or
identifier == "GetterThrows" or
identifier == "ChromeOnly" or
identifier == "SameObject" or
identifier == "Constant" or
identifier == "Func" or
identifier == "Frozen" or
identifier == "NewObject"):
# Known attributes that we don't need to do anything with here
pass
else:
raise WebIDLError("Unknown extended attribute %s on attribute" % identifier,
[attr.location])
IDLInterfaceMember.handleExtendedAttribute(self, attr)
def resolve(self, parentScope):
assert isinstance(parentScope, IDLScope)
self.type.resolveType(parentScope)
IDLObjectWithIdentifier.resolve(self, parentScope)
def addExtendedAttributes(self, attrs):
attrs = self.checkForStringHandlingExtendedAttributes(attrs)
IDLInterfaceMember.addExtendedAttributes(self, attrs)
def hasLenientThis(self):
return self.lenientThis
def isUnforgeable(self):
return self._unforgeable
def _getDependentObjects(self):
return set([self.type])
class IDLArgument(IDLObjectWithIdentifier):
def __init__(self, location, identifier, type, optional=False, defaultValue=None, variadic=False, dictionaryMember=False):
IDLObjectWithIdentifier.__init__(self, location, None, identifier)
assert isinstance(type, IDLType)
self.type = type
self.optional = optional
self.defaultValue = defaultValue
self.variadic = variadic
self.dictionaryMember = dictionaryMember
self._isComplete = False
self.enforceRange = False
self.clamp = False
self._allowTreatNonCallableAsNull = False
assert not variadic or optional
def addExtendedAttributes(self, attrs):
attrs = self.checkForStringHandlingExtendedAttributes(
attrs,
isDictionaryMember=self.dictionaryMember,
isOptional=self.optional)
for attribute in attrs:
identifier = attribute.identifier()
if identifier == "Clamp":
if not attribute.noArguments():
raise WebIDLError("[Clamp] must take no arguments",
[attribute.location])
if self.enforceRange:
raise WebIDLError("[EnforceRange] and [Clamp] are mutually exclusive",
[self.location]);
self.clamp = True
elif identifier == "EnforceRange":
if not attribute.noArguments():
raise WebIDLError("[EnforceRange] must take no arguments",
[attribute.location])
if self.clamp:
raise WebIDLError("[EnforceRange] and [Clamp] are mutually exclusive",
[self.location]);
self.enforceRange = True
elif identifier == "TreatNonCallableAsNull":
self._allowTreatNonCallableAsNull = True
else:
raise WebIDLError("Unhandled extended attribute on an argument",
[attribute.location])
def isComplete(self):
return self._isComplete
def complete(self, scope):
if self._isComplete:
return
self._isComplete = True
if not self.type.isComplete():
type = self.type.complete(scope)
assert not isinstance(type, IDLUnresolvedType)
assert not isinstance(type, IDLTypedefType)
assert not isinstance(type.name, IDLUnresolvedIdentifier)
self.type = type
if ((self.type.isDictionary() or
self.type.isUnion() and self.type.unroll().hasDictionaryType) and
self.optional and not self.defaultValue):
# Default optional dictionaries to null, for simplicity,
# so the codegen doesn't have to special-case this.
self.defaultValue = IDLNullValue(self.location)
# Now do the coercing thing; this needs to happen after the
# above creation of a default value.
if self.defaultValue:
self.defaultValue = self.defaultValue.coerceToType(self.type,
self.location)
assert self.defaultValue
def allowTreatNonCallableAsNull(self):
return self._allowTreatNonCallableAsNull
def _getDependentObjects(self):
deps = set([self.type])
if self.defaultValue:
deps.add(self.defaultValue)
return deps
class IDLCallbackType(IDLType, IDLObjectWithScope):
def __init__(self, location, parentScope, identifier, returnType, arguments):
assert isinstance(returnType, IDLType)
IDLType.__init__(self, location, identifier.name)
self._returnType = returnType
# Clone the list
self._arguments = list(arguments)
IDLObjectWithScope.__init__(self, location, parentScope, identifier)
for (returnType, arguments) in self.signatures():
for argument in arguments:
argument.resolve(self)
self._treatNonCallableAsNull = False
self._treatNonObjectAsNull = False
def isCallback(self):
return True
def signatures(self):
return [(self._returnType, self._arguments)]
def tag(self):
return IDLType.Tags.callback
def finish(self, scope):
if not self._returnType.isComplete():
type = self._returnType.complete(scope)
assert not isinstance(type, IDLUnresolvedType)
assert not isinstance(type, IDLTypedefType)
assert not isinstance(type.name, IDLUnresolvedIdentifier)
self._returnType = type
for argument in self._arguments:
if argument.type.isComplete():
continue
type = argument.type.complete(scope)
assert not isinstance(type, IDLUnresolvedType)
assert not isinstance(type, IDLTypedefType)
assert not isinstance(type.name, IDLUnresolvedIdentifier)
argument.type = type
def validate(self):
pass
def isDistinguishableFrom(self, other):
if other.isUnion():
# Just forward to the union; it'll deal
return other.isDistinguishableFrom(self)
return (other.isPrimitive() or other.isString() or other.isEnum() or
other.isNonCallbackInterface() or other.isDate())
def addExtendedAttributes(self, attrs):
unhandledAttrs = []
for attr in attrs:
if attr.identifier() == "TreatNonCallableAsNull":
self._treatNonCallableAsNull = True
elif attr.identifier() == "TreatNonObjectAsNull":
self._treatNonObjectAsNull = True
else:
unhandledAttrs.append(attr)
if self._treatNonCallableAsNull and self._treatNonObjectAsNull:
raise WebIDLError("Cannot specify both [TreatNonCallableAsNull] "
"and [TreatNonObjectAsNull]", [self.location])
if len(unhandledAttrs) != 0:
IDLType.addExtendedAttributes(self, unhandledAttrs)
def _getDependentObjects(self):
return set([self._returnType] + self._arguments)
class IDLMethodOverload:
"""
A class that represents a single overload of a WebIDL method. This is not
quite the same as an element of the "effective overload set" in the spec,
because separate IDLMethodOverloads are not created based on arguments being
optional. Rather, when multiple methods have the same name, there is an
IDLMethodOverload for each one, all hanging off an IDLMethod representing
the full set of overloads.
"""
def __init__(self, returnType, arguments, location):
self.returnType = returnType
# Clone the list of arguments, just in case
self.arguments = list(arguments)
self.location = location
def _getDependentObjects(self):
deps = set(self.arguments)
deps.add(self.returnType)
return deps
class IDLMethod(IDLInterfaceMember, IDLScope):
Special = enum(
'Getter',
'Setter',
'Creator',
'Deleter',
'LegacyCaller',
base=IDLInterfaceMember.Special
)
TypeSuffixModifier = enum(
'None',
'QMark',
'Brackets'
)
NamedOrIndexed = enum(
'Neither',
'Named',
'Indexed'
)
def __init__(self, location, identifier, returnType, arguments,
static=False, getter=False, setter=False, creator=False,
deleter=False, specialType=NamedOrIndexed.Neither,
legacycaller=False, stringifier=False, jsonifier=False):
# REVIEW: specialType is NamedOrIndexed -- wow, this is messed up.
IDLInterfaceMember.__init__(self, location, identifier,
IDLInterfaceMember.Tags.Method)
self._hasOverloads = False
assert isinstance(returnType, IDLType)
# self._overloads is a list of IDLMethodOverloads
self._overloads = [IDLMethodOverload(returnType, arguments, location)]
assert isinstance(static, bool)
self._static = static
assert isinstance(getter, bool)
self._getter = getter
assert isinstance(setter, bool)
self._setter = setter
assert isinstance(creator, bool)
self._creator = creator
assert isinstance(deleter, bool)
self._deleter = deleter
assert isinstance(legacycaller, bool)
self._legacycaller = legacycaller
assert isinstance(stringifier, bool)
self._stringifier = stringifier
assert isinstance(jsonifier, bool)
self._jsonifier = jsonifier
self._specialType = specialType
if static and identifier.name == "prototype":
raise WebIDLError("The identifier of a static operation must not be 'prototype'",
[location])
self.assertSignatureConstraints()
def __str__(self):
return "Method '%s'" % self.identifier
def assertSignatureConstraints(self):
if self._getter or self._deleter:
assert len(self._overloads) == 1
overload = self._overloads[0]
arguments = overload.arguments
assert len(arguments) == 1
assert arguments[0].type == BuiltinTypes[IDLBuiltinType.Types.domstring] or \
arguments[0].type == BuiltinTypes[IDLBuiltinType.Types.unsigned_long]
assert not arguments[0].optional and not arguments[0].variadic
assert not self._getter or not overload.returnType.isVoid()
if self._setter or self._creator:
assert len(self._overloads) == 1
arguments = self._overloads[0].arguments
assert len(arguments) == 2
assert arguments[0].type == BuiltinTypes[IDLBuiltinType.Types.domstring] or \
arguments[0].type == BuiltinTypes[IDLBuiltinType.Types.unsigned_long]
assert not arguments[0].optional and not arguments[0].variadic
assert not arguments[1].optional and not arguments[1].variadic
if self._stringifier:
assert len(self._overloads) == 1
overload = self._overloads[0]
assert len(overload.arguments) == 0
assert overload.returnType == BuiltinTypes[IDLBuiltinType.Types.domstring]
if self._jsonifier:
assert len(self._overloads) == 1
overload = self._overloads[0]
assert len(overload.arguments) == 0
assert overload.returnType == BuiltinTypes[IDLBuiltinType.Types.object]
def isStatic(self):
return self._static
def isGetter(self):
return self._getter
def isSetter(self):
return self._setter
def isCreator(self):
return self._creator
def isDeleter(self):
return self._deleter
def isNamed(self):
assert self._specialType == IDLMethod.NamedOrIndexed.Named or \
self._specialType == IDLMethod.NamedOrIndexed.Indexed
return self._specialType == IDLMethod.NamedOrIndexed.Named
def isIndexed(self):
assert self._specialType == IDLMethod.NamedOrIndexed.Named or \
self._specialType == IDLMethod.NamedOrIndexed.Indexed
return self._specialType == IDLMethod.NamedOrIndexed.Indexed
def isLegacycaller(self):
return self._legacycaller
def isStringifier(self):
return self._stringifier
def isJsonifier(self):
return self._jsonifier
def hasOverloads(self):
return self._hasOverloads
def isIdentifierLess(self):
return self.identifier.name[:2] == "__" and self.identifier.name != "__noSuchMethod__"
def resolve(self, parentScope):
assert isinstance(parentScope, IDLScope)
IDLObjectWithIdentifier.resolve(self, parentScope)
IDLScope.__init__(self, self.location, parentScope, self.identifier)
for (returnType, arguments) in self.signatures():
for argument in arguments:
argument.resolve(self)
def addOverload(self, method):
assert len(method._overloads) == 1
if self._extendedAttrDict != method ._extendedAttrDict:
raise WebIDLError("Extended attributes differ on different "
"overloads of %s" % method.identifier,
[self.location, method.location])
self._overloads.extend(method._overloads)
self._hasOverloads = True
if self.isStatic() != method.isStatic():
raise WebIDLError("Overloaded identifier %s appears with different values of the 'static' attribute" % method.identifier,
[method.location])
if self.isLegacycaller() != method.isLegacycaller():
raise WebIDLError("Overloaded identifier %s appears with different values of the 'legacycaller' attribute" % method.identifier,
[method.location])
# Can't overload special things!
assert not self.isGetter()
assert not method.isGetter()
assert not self.isSetter()
assert not method.isSetter()
assert not self.isCreator()
assert not method.isCreator()
assert not self.isDeleter()
assert not method.isDeleter()
assert not self.isStringifier()
assert not method.isStringifier()
assert not self.isJsonifier()
assert not method.isJsonifier()
return self
def signatures(self):
return [(overload.returnType, overload.arguments) for overload in
self._overloads]
def finish(self, scope):
for overload in self._overloads:
variadicArgument = None
arguments = overload.arguments
for (idx, argument) in enumerate(arguments):
if not argument.isComplete():
argument.complete(scope)
assert argument.type.isComplete()
if (argument.type.isDictionary() or
(argument.type.isUnion() and
argument.type.unroll().hasDictionaryType)):
# Dictionaries and unions containing dictionaries at the
# end of the list or followed by optional arguments must be
# optional.
if (not argument.optional and
all(arg.optional for arg in arguments[idx+1:])):
raise WebIDLError("Dictionary argument or union "
"argument containing a dictionary "
"not followed by a required argument "
"must be optional",
[argument.location])
# An argument cannot be a Nullable Dictionary
if argument.type.nullable():
raise WebIDLError("An argument cannot be a nullable "
"dictionary or nullable union "
"containing a dictionary",
[argument.location])
# Only the last argument can be variadic
if variadicArgument:
raise WebIDLError("Variadic argument is not last argument",
[variadicArgument.location])
if argument.variadic:
variadicArgument = argument
returnType = overload.returnType
if returnType.isComplete():
continue
type = returnType.complete(scope)
assert not isinstance(type, IDLUnresolvedType)
assert not isinstance(type, IDLTypedefType)
assert not isinstance(type.name, IDLUnresolvedIdentifier)
overload.returnType = type
# Now compute various information that will be used by the
# WebIDL overload resolution algorithm.
self.maxArgCount = max(len(s[1]) for s in self.signatures())
self.allowedArgCounts = [ i for i in range(self.maxArgCount+1)
if len(self.signaturesForArgCount(i)) != 0 ]
def validate(self):
# Make sure our overloads are properly distinguishable and don't have
# different argument types before the distinguishing args.
for argCount in self.allowedArgCounts:
possibleOverloads = self.overloadsForArgCount(argCount)
if len(possibleOverloads) == 1:
continue
distinguishingIndex = self.distinguishingIndexForArgCount(argCount)
for idx in range(distinguishingIndex):
firstSigType = possibleOverloads[0].arguments[idx].type
for overload in possibleOverloads[1:]:
if overload.arguments[idx].type != firstSigType:
raise WebIDLError(
"Signatures for method '%s' with %d arguments have "
"different types of arguments at index %d, which "
"is before distinguishing index %d" %
(self.identifier.name, argCount, idx,
distinguishingIndex),
[self.location, overload.location])
def overloadsForArgCount(self, argc):
return [overload for overload in self._overloads if
len(overload.arguments) == argc or
(len(overload.arguments) > argc and
all(arg.optional for arg in overload.arguments[argc:])) or
(len(overload.arguments) < argc and
len(overload.arguments) > 0 and
overload.arguments[-1].variadic)]
def signaturesForArgCount(self, argc):
return [(overload.returnType, overload.arguments) for overload
in self.overloadsForArgCount(argc)]
def locationsForArgCount(self, argc):
return [overload.location for overload in self.overloadsForArgCount(argc)]
def distinguishingIndexForArgCount(self, argc):
def isValidDistinguishingIndex(idx, signatures):
for (firstSigIndex, (firstRetval, firstArgs)) in enumerate(signatures[:-1]):
for (secondRetval, secondArgs) in signatures[firstSigIndex+1:]:
if idx < len(firstArgs):
firstType = firstArgs[idx].type
else:
assert(firstArgs[-1].variadic)
firstType = firstArgs[-1].type
if idx < len(secondArgs):
secondType = secondArgs[idx].type
else:
assert(secondArgs[-1].variadic)
secondType = secondArgs[-1].type
if not firstType.isDistinguishableFrom(secondType):
return False
return True
signatures = self.signaturesForArgCount(argc)
for idx in range(argc):
if isValidDistinguishingIndex(idx, signatures):
return idx
# No valid distinguishing index. Time to throw
locations = self.locationsForArgCount(argc)
raise WebIDLError("Signatures with %d arguments for method '%s' are not "
"distinguishable" % (argc, self.identifier.name),
locations)
def handleExtendedAttribute(self, attr):
identifier = attr.identifier()
if identifier == "GetterThrows":
raise WebIDLError("Methods must not be flagged as "
"[GetterThrows]",
[attr.location, self.location])
elif identifier == "SetterThrows":
raise WebIDLError("Methods must not be flagged as "
"[SetterThrows]",
[attr.location, self.location])
elif identifier == "Unforgeable":
raise WebIDLError("Methods must not be flagged as "
"[Unforgeable]",
[attr.location, self.location])
elif identifier == "SameObject":
raise WebIDLError("Methods must not be flagged as [SameObject]",
[attr.location, self.location]);
elif identifier == "Constant":
raise WebIDLError("Methods must not be flagged as [Constant]",
[attr.location, self.location]);
elif identifier == "PutForwards":
raise WebIDLError("Only attributes support [PutForwards]",
[attr.location, self.location])
elif identifier == "LenientFloat":
# This is called before we've done overload resolution
assert len(self.signatures()) == 1
sig = self.signatures()[0]
if not sig[0].isVoid():
raise WebIDLError("[LenientFloat] used on a non-void method",
[attr.location, self.location])
if not any(arg.type.includesRestrictedFloat() for arg in sig[1]):
raise WebIDLError("[LenientFloat] used on an operation with no "
"restricted float type arguments",
[attr.location, self.location])
elif (identifier == "Throws" or
identifier == "NewObject" or
identifier == "ChromeOnly" or
identifier == "Pref" or
identifier == "Func" or
identifier == "Pure" or
identifier == "CrossOriginCallable" or
identifier == "WebGLHandlesContextLoss"):
# Known attributes that we don't need to do anything with here
pass
else:
raise WebIDLError("Unknown extended attribute %s on method" % identifier,
[attr.location])
IDLInterfaceMember.handleExtendedAttribute(self, attr)
def _getDependentObjects(self):
deps = set()
for overload in self._overloads:
deps.union(overload._getDependentObjects())
return deps
class IDLImplementsStatement(IDLObject):
def __init__(self, location, implementor, implementee):
IDLObject.__init__(self, location)
self.implementor = implementor;
self.implementee = implementee
def finish(self, scope):
assert(isinstance(self.implementor, IDLIdentifierPlaceholder))
assert(isinstance(self.implementee, IDLIdentifierPlaceholder))
implementor = self.implementor.finish(scope)
implementee = self.implementee.finish(scope)
# NOTE: we depend on not setting self.implementor and
# self.implementee here to keep track of the original
# locations.
if not isinstance(implementor, IDLInterface):
raise WebIDLError("Left-hand side of 'implements' is not an "
"interface",
[self.implementor.location])
if implementor.isCallback():
raise WebIDLError("Left-hand side of 'implements' is a callback "
"interface",
[self.implementor.location])
if not isinstance(implementee, IDLInterface):
raise WebIDLError("Right-hand side of 'implements' is not an "
"interface",
[self.implementee.location])
if implementee.isCallback():
raise WebIDLError("Right-hand side of 'implements' is a callback "
"interface",
[self.implementee.location])
implementor.addImplementedInterface(implementee)
def validate(self):
pass
def addExtendedAttributes(self, attrs):
assert len(attrs) == 0
class IDLExtendedAttribute(IDLObject):
"""
A class to represent IDL extended attributes so we can give them locations
"""
def __init__(self, location, tuple):
IDLObject.__init__(self, location)
self._tuple = tuple
def identifier(self):
return self._tuple[0]
def noArguments(self):
return len(self._tuple) == 1
def hasValue(self):
return len(self._tuple) >= 2 and isinstance(self._tuple[1], str)
def value(self):
assert(self.hasValue())
return self._tuple[1]
def hasArgs(self):
return (len(self._tuple) == 2 and isinstance(self._tuple[1], list) or
len(self._tuple) == 3)
def args(self):
assert(self.hasArgs())
# Our args are our last element
return self._tuple[-1]
def listValue(self):
"""
Backdoor for storing random data in _extendedAttrDict
"""
return list(self._tuple)[1:]
# Parser
class Tokenizer(object):
tokens = [
"INTEGER",
"FLOATLITERAL",
"IDENTIFIER",
"STRING",
"WHITESPACE",
"OTHER"
]
def t_FLOATLITERAL(self, t):
r'(-?(([0-9]+\.[0-9]*|[0-9]*\.[0-9]+)([Ee][+-]?[0-9]+)?|[0-9]+[Ee][+-]?[0-9]+|Infinity))|NaN'
t.value = float(t.value)
return t
def t_INTEGER(self, t):
r'-?(0([0-7]+|[Xx][0-9A-Fa-f]+)?|[1-9][0-9]*)'
try:
# Can't use int(), because that doesn't handle octal properly.
t.value = parseInt(t.value)
except:
raise WebIDLError("Invalid integer literal",
[Location(lexer=self.lexer,
lineno=self.lexer.lineno,
lexpos=self.lexer.lexpos,
filename=self._filename)])
return t
def t_IDENTIFIER(self, t):
r'[A-Z_a-z][0-9A-Z_a-z]*'
t.type = self.keywords.get(t.value, 'IDENTIFIER')
return t
def t_STRING(self, t):
r'"[^"]*"'
t.value = t.value[1:-1]
return t
def t_WHITESPACE(self, t):
r'[\t\n\r ]+|[\t\n\r ]*((//[^\n]*|/\*.*?\*/)[\t\n\r ]*)+'
pass
def t_ELLIPSIS(self, t):
r'\.\.\.'
t.type = self.keywords.get(t.value)
return t
def t_OTHER(self, t):
r'[^\t\n\r 0-9A-Z_a-z]'
t.type = self.keywords.get(t.value, 'OTHER')
return t
keywords = {
"module": "MODULE",
"interface": "INTERFACE",
"partial": "PARTIAL",
"dictionary": "DICTIONARY",
"exception": "EXCEPTION",
"enum": "ENUM",
"callback": "CALLBACK",
"typedef": "TYPEDEF",
"implements": "IMPLEMENTS",
"const": "CONST",
"null": "NULL",
"true": "TRUE",
"false": "FALSE",
"serializer": "SERIALIZER",
"stringifier": "STRINGIFIER",
"jsonifier": "JSONIFIER",
"unrestricted": "UNRESTRICTED",
"attribute": "ATTRIBUTE",
"readonly": "READONLY",
"inherit": "INHERIT",
"static": "STATIC",
"getter": "GETTER",
"setter": "SETTER",
"creator": "CREATOR",
"deleter": "DELETER",
"legacycaller": "LEGACYCALLER",
"optional": "OPTIONAL",
"...": "ELLIPSIS",
"::": "SCOPE",
"Date": "DATE",
"DOMString": "DOMSTRING",
"ByteString": "BYTESTRING",
"any": "ANY",
"boolean": "BOOLEAN",
"byte": "BYTE",
"double": "DOUBLE",
"float": "FLOAT",
"long": "LONG",
"object": "OBJECT",
"octet": "OCTET",
"optional": "OPTIONAL",
"sequence": "SEQUENCE",
"short": "SHORT",
"unsigned": "UNSIGNED",
"void": "VOID",
":": "COLON",
";": "SEMICOLON",
"{": "LBRACE",
"}": "RBRACE",
"(": "LPAREN",
")": "RPAREN",
"[": "LBRACKET",
"]": "RBRACKET",
"?": "QUESTIONMARK",
",": "COMMA",
"=": "EQUALS",
"<": "LT",
">": "GT",
"ArrayBuffer": "ARRAYBUFFER",
"or": "OR"
}
tokens.extend(keywords.values())
def t_error(self, t):
raise WebIDLError("Unrecognized Input",
[Location(lexer=self.lexer,
lineno=self.lexer.lineno,
lexpos=self.lexer.lexpos,
filename = self.filename)])
def __init__(self, outputdir, lexer=None):
if lexer:
self.lexer = lexer
else:
self.lexer = lex.lex(object=self,
outputdir=outputdir,
lextab='webidllex',
reflags=re.DOTALL)
class Parser(Tokenizer):
def getLocation(self, p, i):
return Location(self.lexer, p.lineno(i), p.lexpos(i), self._filename)
def globalScope(self):
return self._globalScope
# The p_Foo functions here must match the WebIDL spec's grammar.
# It's acceptable to split things at '|' boundaries.
def p_Definitions(self, p):
"""
Definitions : ExtendedAttributeList Definition Definitions
"""
if p[2]:
p[0] = [p[2]]
p[2].addExtendedAttributes(p[1])
else:
assert not p[1]
p[0] = []
p[0].extend(p[3])
def p_DefinitionsEmpty(self, p):
"""
Definitions :
"""
p[0] = []
def p_Definition(self, p):
"""
Definition : CallbackOrInterface
| PartialInterface
| Dictionary
| Exception
| Enum
| Typedef
| ImplementsStatement
"""
p[0] = p[1]
assert p[1] # We might not have implemented something ...
def p_CallbackOrInterfaceCallback(self, p):
"""
CallbackOrInterface : CALLBACK CallbackRestOrInterface
"""
if p[2].isInterface():
assert isinstance(p[2], IDLInterface)
p[2].setCallback(True)
p[0] = p[2]
def p_CallbackOrInterfaceInterface(self, p):
"""
CallbackOrInterface : Interface
"""
p[0] = p[1]
def p_CallbackRestOrInterface(self, p):
"""
CallbackRestOrInterface : CallbackRest
| Interface
"""
assert p[1]
p[0] = p[1]
def p_Interface(self, p):
"""
Interface : INTERFACE IDENTIFIER Inheritance LBRACE InterfaceMembers RBRACE SEMICOLON
"""
location = self.getLocation(p, 1)
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 2), p[2])
members = p[5]
parent = p[3]
try:
if self.globalScope()._lookupIdentifier(identifier):
p[0] = self.globalScope()._lookupIdentifier(identifier)
if not isinstance(p[0], IDLInterface):
raise WebIDLError("Partial interface has the same name as "
"non-interface object",
[location, p[0].location])
p[0].setNonPartial(location, parent, members)
return
except Exception, ex:
if isinstance(ex, WebIDLError):
raise ex
pass
p[0] = IDLInterface(location, self.globalScope(), identifier, parent,
members, isPartial=False)
def p_InterfaceForwardDecl(self, p):
"""
Interface : INTERFACE IDENTIFIER SEMICOLON
"""
location = self.getLocation(p, 1)
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 2), p[2])
try:
if self.globalScope()._lookupIdentifier(identifier):
p[0] = self.globalScope()._lookupIdentifier(identifier)
if not isinstance(p[0], IDLExternalInterface):
raise WebIDLError("Name collision between external "
"interface declaration for identifier "
"%s and %s" % (identifier.name, p[0]),
[location, p[0].location])
return
except Exception, ex:
if isinstance(ex, WebIDLError):
raise ex
pass
p[0] = IDLExternalInterface(location, self.globalScope(), identifier)
def p_PartialInterface(self, p):
"""
PartialInterface : PARTIAL INTERFACE IDENTIFIER LBRACE InterfaceMembers RBRACE SEMICOLON
"""
location = self.getLocation(p, 2)
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 3), p[3])
members = p[5]
try:
if self.globalScope()._lookupIdentifier(identifier):
p[0] = self.globalScope()._lookupIdentifier(identifier)
if not isinstance(p[0], IDLInterface):
raise WebIDLError("Partial interface has the same name as "
"non-interface object",
[location, p[0].location])
# Just throw our members into the existing IDLInterface. If we
# have extended attributes, those will get added to it
# automatically.
p[0].members.extend(members)
return
except Exception, ex:
if isinstance(ex, WebIDLError):
raise ex
pass
p[0] = IDLInterface(location, self.globalScope(), identifier, None,
members, isPartial=True)
pass
def p_Inheritance(self, p):
"""
Inheritance : COLON ScopedName
"""
p[0] = IDLIdentifierPlaceholder(self.getLocation(p, 2), p[2])
def p_InheritanceEmpty(self, p):
"""
Inheritance :
"""
pass
def p_InterfaceMembers(self, p):
"""
InterfaceMembers : ExtendedAttributeList InterfaceMember InterfaceMembers
"""
p[0] = [p[2]] if p[2] else []
assert not p[1] or p[2]
p[2].addExtendedAttributes(p[1])
p[0].extend(p[3])
def p_InterfaceMembersEmpty(self, p):
"""
InterfaceMembers :
"""
p[0] = []
def p_InterfaceMember(self, p):
"""
InterfaceMember : Const
| AttributeOrOperation
"""
p[0] = p[1]
def p_Dictionary(self, p):
"""
Dictionary : DICTIONARY IDENTIFIER Inheritance LBRACE DictionaryMembers RBRACE SEMICOLON
"""
location = self.getLocation(p, 1)
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 2), p[2])
members = p[5]
p[0] = IDLDictionary(location, self.globalScope(), identifier, p[3], members)
def p_DictionaryMembers(self, p):
"""
DictionaryMembers : ExtendedAttributeList DictionaryMember DictionaryMembers
|
"""
if len(p) == 1:
# We're at the end of the list
p[0] = []
return
# Add our extended attributes
p[2].addExtendedAttributes(p[1])
p[0] = [p[2]]
p[0].extend(p[3])
def p_DictionaryMember(self, p):
"""
DictionaryMember : Type IDENTIFIER DefaultValue SEMICOLON
"""
# These quack a lot like optional arguments, so just treat them that way.
t = p[1]
assert isinstance(t, IDLType)
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 2), p[2])
defaultValue = p[3]
p[0] = IDLArgument(self.getLocation(p, 2), identifier, t, optional=True,
defaultValue=defaultValue, variadic=False,
dictionaryMember=True)
def p_DefaultValue(self, p):
"""
DefaultValue : EQUALS ConstValue
|
"""
if len(p) > 1:
p[0] = p[2]
else:
p[0] = None
def p_Exception(self, p):
"""
Exception : EXCEPTION IDENTIFIER Inheritance LBRACE ExceptionMembers RBRACE SEMICOLON
"""
pass
def p_Enum(self, p):
"""
Enum : ENUM IDENTIFIER LBRACE EnumValueList RBRACE SEMICOLON
"""
location = self.getLocation(p, 1)
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 2), p[2])
values = p[4]
assert values
p[0] = IDLEnum(location, self.globalScope(), identifier, values)
def p_EnumValueList(self, p):
"""
EnumValueList : STRING EnumValueListComma
"""
p[0] = [p[1]]
p[0].extend(p[2])
def p_EnumValueListComma(self, p):
"""
EnumValueListComma : COMMA EnumValueListString
"""
p[0] = p[2]
def p_EnumValueListCommaEmpty(self, p):
"""
EnumValueListComma :
"""
p[0] = []
def p_EnumValueListString(self, p):
"""
EnumValueListString : STRING EnumValueListComma
"""
p[0] = [p[1]]
p[0].extend(p[2])
def p_EnumValueListStringEmpty(self, p):
"""
EnumValueListString :
"""
p[0] = []
def p_CallbackRest(self, p):
"""
CallbackRest : IDENTIFIER EQUALS ReturnType LPAREN ArgumentList RPAREN SEMICOLON
"""
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 1), p[1])
p[0] = IDLCallbackType(self.getLocation(p, 1), self.globalScope(),
identifier, p[3], p[5])
def p_ExceptionMembers(self, p):
"""
ExceptionMembers : ExtendedAttributeList ExceptionMember ExceptionMembers
|
"""
pass
def p_Typedef(self, p):
"""
Typedef : TYPEDEF Type IDENTIFIER SEMICOLON
"""
typedef = IDLTypedefType(self.getLocation(p, 1), p[2], p[3])
typedef.resolve(self.globalScope())
p[0] = typedef
def p_ImplementsStatement(self, p):
"""
ImplementsStatement : ScopedName IMPLEMENTS ScopedName SEMICOLON
"""
assert(p[2] == "implements")
implementor = IDLIdentifierPlaceholder(self.getLocation(p, 1), p[1])
implementee = IDLIdentifierPlaceholder(self.getLocation(p, 3), p[3])
p[0] = IDLImplementsStatement(self.getLocation(p, 1), implementor,
implementee)
def p_Const(self, p):
"""
Const : CONST ConstType IDENTIFIER EQUALS ConstValue SEMICOLON
"""
location = self.getLocation(p, 1)
type = p[2]
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 3), p[3])
value = p[5]
p[0] = IDLConst(location, identifier, type, value)
def p_ConstValueBoolean(self, p):
"""
ConstValue : BooleanLiteral
"""
location = self.getLocation(p, 1)
booleanType = BuiltinTypes[IDLBuiltinType.Types.boolean]
p[0] = IDLValue(location, booleanType, p[1])
def p_ConstValueInteger(self, p):
"""
ConstValue : INTEGER
"""
location = self.getLocation(p, 1)
# We don't know ahead of time what type the integer literal is.
# Determine the smallest type it could possibly fit in and use that.
integerType = matchIntegerValueToType(p[1])
if integerType == None:
raise WebIDLError("Integer literal out of range", [location])
p[0] = IDLValue(location, integerType, p[1])
def p_ConstValueFloat(self, p):
"""
ConstValue : FLOATLITERAL
"""
location = self.getLocation(p, 1)
p[0] = IDLValue(location, BuiltinTypes[IDLBuiltinType.Types.unrestricted_float], p[1])
def p_ConstValueString(self, p):
"""
ConstValue : STRING
"""
location = self.getLocation(p, 1)
stringType = BuiltinTypes[IDLBuiltinType.Types.domstring]
p[0] = IDLValue(location, stringType, p[1])
def p_ConstValueNull(self, p):
"""
ConstValue : NULL
"""
p[0] = IDLNullValue(self.getLocation(p, 1))
def p_BooleanLiteralTrue(self, p):
"""
BooleanLiteral : TRUE
"""
p[0] = True
def p_BooleanLiteralFalse(self, p):
"""
BooleanLiteral : FALSE
"""
p[0] = False
def p_AttributeOrOperation(self, p):
"""
AttributeOrOperation : Attribute
| Operation
"""
p[0] = p[1]
def p_AttributeWithQualifier(self, p):
"""
Attribute : Qualifier AttributeRest
"""
static = IDLInterfaceMember.Special.Static in p[1]
stringifier = IDLInterfaceMember.Special.Stringifier in p[1]
(location, identifier, type, readonly) = p[2]
p[0] = IDLAttribute(location, identifier, type, readonly, static=static,
stringifier=stringifier)
def p_Attribute(self, p):
"""
Attribute : Inherit AttributeRest
"""
(location, identifier, type, readonly) = p[2]
p[0] = IDLAttribute(location, identifier, type, readonly, inherit=p[1])
def p_AttributeRest(self, p):
"""
AttributeRest : ReadOnly ATTRIBUTE Type IDENTIFIER SEMICOLON
"""
location = self.getLocation(p, 2)
readonly = p[1]
t = p[3]
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 4), p[4])
p[0] = (location, identifier, t, readonly)
def p_ReadOnly(self, p):
"""
ReadOnly : READONLY
"""
p[0] = True
def p_ReadOnlyEmpty(self, p):
"""
ReadOnly :
"""
p[0] = False
def p_Inherit(self, p):
"""
Inherit : INHERIT
"""
p[0] = True
def p_InheritEmpty(self, p):
"""
Inherit :
"""
p[0] = False
def p_Operation(self, p):
"""
Operation : Qualifiers OperationRest
"""
qualifiers = p[1]
# Disallow duplicates in the qualifier set
if not len(set(qualifiers)) == len(qualifiers):
raise WebIDLError("Duplicate qualifiers are not allowed",
[self.getLocation(p, 1)])
static = IDLInterfaceMember.Special.Static in p[1]
# If static is there that's all that's allowed. This is disallowed
# by the parser, so we can assert here.
assert not static or len(qualifiers) == 1
stringifier = IDLInterfaceMember.Special.Stringifier in p[1]
# If stringifier is there that's all that's allowed. This is disallowed
# by the parser, so we can assert here.
assert not stringifier or len(qualifiers) == 1
getter = True if IDLMethod.Special.Getter in p[1] else False
setter = True if IDLMethod.Special.Setter in p[1] else False
creator = True if IDLMethod.Special.Creator in p[1] else False
deleter = True if IDLMethod.Special.Deleter in p[1] else False
legacycaller = True if IDLMethod.Special.LegacyCaller in p[1] else False
if getter or deleter:
if setter or creator:
raise WebIDLError("getter and deleter are incompatible with setter and creator",
[self.getLocation(p, 1)])
(returnType, identifier, arguments) = p[2]
assert isinstance(returnType, IDLType)
specialType = IDLMethod.NamedOrIndexed.Neither
if getter or deleter:
if len(arguments) != 1:
raise WebIDLError("%s has wrong number of arguments" %
("getter" if getter else "deleter"),
[self.getLocation(p, 2)])
argType = arguments[0].type
if argType == BuiltinTypes[IDLBuiltinType.Types.domstring]:
specialType = IDLMethod.NamedOrIndexed.Named
elif argType == BuiltinTypes[IDLBuiltinType.Types.unsigned_long]:
specialType = IDLMethod.NamedOrIndexed.Indexed
else:
raise WebIDLError("%s has wrong argument type (must be DOMString or UnsignedLong)" %
("getter" if getter else "deleter"),
[arguments[0].location])
if arguments[0].optional or arguments[0].variadic:
raise WebIDLError("%s cannot have %s argument" %
("getter" if getter else "deleter",
"optional" if arguments[0].optional else "variadic"),
[arguments[0].location])
if getter:
if returnType.isVoid():
raise WebIDLError("getter cannot have void return type",
[self.getLocation(p, 2)])
if setter or creator:
if len(arguments) != 2:
raise WebIDLError("%s has wrong number of arguments" %
("setter" if setter else "creator"),
[self.getLocation(p, 2)])
argType = arguments[0].type
if argType == BuiltinTypes[IDLBuiltinType.Types.domstring]:
specialType = IDLMethod.NamedOrIndexed.Named
elif argType == BuiltinTypes[IDLBuiltinType.Types.unsigned_long]:
specialType = IDLMethod.NamedOrIndexed.Indexed
else:
raise WebIDLError("%s has wrong argument type (must be DOMString or UnsignedLong)" %
("setter" if setter else "creator"),
[arguments[0].location])
if arguments[0].optional or arguments[0].variadic:
raise WebIDLError("%s cannot have %s argument" %
("setter" if setter else "creator",
"optional" if arguments[0].optional else "variadic"),
[arguments[0].location])
if arguments[1].optional or arguments[1].variadic:
raise WebIDLError("%s cannot have %s argument" %
("setter" if setter else "creator",
"optional" if arguments[1].optional else "variadic"),
[arguments[1].location])
if stringifier:
if len(arguments) != 0:
raise WebIDLError("stringifier has wrong number of arguments",
[self.getLocation(p, 2)])
if not returnType.isDOMString():
raise WebIDLError("stringifier must have DOMString return type",
[self.getLocation(p, 2)])
# identifier might be None. This is only permitted for special methods.
if not identifier:
if not getter and not setter and not creator and \
not deleter and not legacycaller and not stringifier:
raise WebIDLError("Identifier required for non-special methods",
[self.getLocation(p, 2)])
location = BuiltinLocation("<auto-generated-identifier>")
identifier = IDLUnresolvedIdentifier(location, "__%s%s%s%s%s%s%s" %
("named" if specialType == IDLMethod.NamedOrIndexed.Named else \
"indexed" if specialType == IDLMethod.NamedOrIndexed.Indexed else "",
"getter" if getter else "",
"setter" if setter else "",
"deleter" if deleter else "",
"creator" if creator else "",
"legacycaller" if legacycaller else "",
"stringifier" if stringifier else ""), allowDoubleUnderscore=True)
method = IDLMethod(self.getLocation(p, 2), identifier, returnType, arguments,
static=static, getter=getter, setter=setter, creator=creator,
deleter=deleter, specialType=specialType,
legacycaller=legacycaller, stringifier=stringifier)
p[0] = method
def p_Stringifier(self, p):
"""
Operation : STRINGIFIER SEMICOLON
"""
identifier = IDLUnresolvedIdentifier(BuiltinLocation("<auto-generated-identifier>"),
"__stringifier",
allowDoubleUnderscore=True)
method = IDLMethod(self.getLocation(p, 1),
identifier,
returnType=BuiltinTypes[IDLBuiltinType.Types.domstring],
arguments=[],
stringifier=True)
p[0] = method
def p_Jsonifier(self, p):
"""
Operation : JSONIFIER SEMICOLON
"""
identifier = IDLUnresolvedIdentifier(BuiltinLocation("<auto-generated-identifier>"),
"__jsonifier", allowDoubleUnderscore=True)
method = IDLMethod(self.getLocation(p, 1),
identifier,
returnType=BuiltinTypes[IDLBuiltinType.Types.object],
arguments=[],
jsonifier=True)
p[0] = method
def p_QualifierStatic(self, p):
"""
Qualifier : STATIC
"""
p[0] = [IDLInterfaceMember.Special.Static]
def p_QualifierStringifier(self, p):
"""
Qualifier : STRINGIFIER
"""
p[0] = [IDLInterfaceMember.Special.Stringifier]
def p_Qualifiers(self, p):
"""
Qualifiers : Qualifier
| Specials
"""
p[0] = p[1]
def p_Specials(self, p):
"""
Specials : Special Specials
"""
p[0] = [p[1]]
p[0].extend(p[2])
def p_SpecialsEmpty(self, p):
"""
Specials :
"""
p[0] = []
def p_SpecialGetter(self, p):
"""
Special : GETTER
"""
p[0] = IDLMethod.Special.Getter
def p_SpecialSetter(self, p):
"""
Special : SETTER
"""
p[0] = IDLMethod.Special.Setter
def p_SpecialCreator(self, p):
"""
Special : CREATOR
"""
p[0] = IDLMethod.Special.Creator
def p_SpecialDeleter(self, p):
"""
Special : DELETER
"""
p[0] = IDLMethod.Special.Deleter
def p_SpecialLegacyCaller(self, p):
"""
Special : LEGACYCALLER
"""
p[0] = IDLMethod.Special.LegacyCaller
def p_OperationRest(self, p):
"""
OperationRest : ReturnType OptionalIdentifier LPAREN ArgumentList RPAREN SEMICOLON
"""
p[0] = (p[1], p[2], p[4])
def p_OptionalIdentifier(self, p):
"""
OptionalIdentifier : IDENTIFIER
"""
p[0] = IDLUnresolvedIdentifier(self.getLocation(p, 1), p[1])
def p_OptionalIdentifierEmpty(self, p):
"""
OptionalIdentifier :
"""
pass
def p_ArgumentList(self, p):
"""
ArgumentList : Argument Arguments
"""
p[0] = [p[1]] if p[1] else []
p[0].extend(p[2])
def p_ArgumentListEmpty(self, p):
"""
ArgumentList :
"""
p[0] = []
def p_Arguments(self, p):
"""
Arguments : COMMA Argument Arguments
"""
p[0] = [p[2]] if p[2] else []
p[0].extend(p[3])
def p_ArgumentsEmpty(self, p):
"""
Arguments :
"""
p[0] = []
def p_Argument(self, p):
"""
Argument : ExtendedAttributeList Optional Type Ellipsis ArgumentName DefaultValue
"""
t = p[3]
assert isinstance(t, IDLType)
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 5), p[5])
optional = p[2]
variadic = p[4]
defaultValue = p[6]
if not optional and defaultValue:
raise WebIDLError("Mandatory arguments can't have a default value.",
[self.getLocation(p, 6)])
if variadic:
if optional:
raise WebIDLError("Variadic arguments should not be marked optional.",
[self.getLocation(p, 2)])
optional = variadic
p[0] = IDLArgument(self.getLocation(p, 5), identifier, t, optional, defaultValue, variadic)
p[0].addExtendedAttributes(p[1])
def p_ArgumentName(self, p):
"""
ArgumentName : IDENTIFIER
| ATTRIBUTE
| CALLBACK
| CONST
| CREATOR
| DELETER
| DICTIONARY
| ENUM
| EXCEPTION
| GETTER
| IMPLEMENTS
| INHERIT
| INTERFACE
| LEGACYCALLER
| PARTIAL
| SERIALIZER
| SETTER
| STATIC
| STRINGIFIER
| JSONIFIER
| TYPEDEF
| UNRESTRICTED
"""
p[0] = p[1]
def p_Optional(self, p):
"""
Optional : OPTIONAL
"""
p[0] = True
def p_OptionalEmpty(self, p):
"""
Optional :
"""
p[0] = False
def p_Ellipsis(self, p):
"""
Ellipsis : ELLIPSIS
"""
p[0] = True
def p_EllipsisEmpty(self, p):
"""
Ellipsis :
"""
p[0] = False
def p_ExceptionMember(self, p):
"""
ExceptionMember : Const
| ExceptionField
"""
pass
def p_ExceptionField(self, p):
"""
ExceptionField : Type IDENTIFIER SEMICOLON
"""
pass
def p_ExtendedAttributeList(self, p):
"""
ExtendedAttributeList : LBRACKET ExtendedAttribute ExtendedAttributes RBRACKET
"""
p[0] = [p[2]]
if p[3]:
p[0].extend(p[3])
def p_ExtendedAttributeListEmpty(self, p):
"""
ExtendedAttributeList :
"""
p[0] = []
def p_ExtendedAttribute(self, p):
"""
ExtendedAttribute : ExtendedAttributeNoArgs
| ExtendedAttributeArgList
| ExtendedAttributeIdent
| ExtendedAttributeNamedArgList
"""
p[0] = IDLExtendedAttribute(self.getLocation(p, 1), p[1])
def p_ExtendedAttributeEmpty(self, p):
"""
ExtendedAttribute :
"""
pass
def p_ExtendedAttributes(self, p):
"""
ExtendedAttributes : COMMA ExtendedAttribute ExtendedAttributes
"""
p[0] = [p[2]] if p[2] else []
p[0].extend(p[3])
def p_ExtendedAttributesEmpty(self, p):
"""
ExtendedAttributes :
"""
p[0] = []
def p_Other(self, p):
"""
Other : INTEGER
| FLOATLITERAL
| IDENTIFIER
| STRING
| OTHER
| ELLIPSIS
| COLON
| SCOPE
| SEMICOLON
| LT
| EQUALS
| GT
| QUESTIONMARK
| DATE
| DOMSTRING
| BYTESTRING
| ANY
| ATTRIBUTE
| BOOLEAN
| BYTE
| LEGACYCALLER
| CONST
| CREATOR
| DELETER
| DOUBLE
| EXCEPTION
| FALSE
| FLOAT
| GETTER
| IMPLEMENTS
| INHERIT
| INTERFACE
| LONG
| MODULE
| NULL
| OBJECT
| OCTET
| OPTIONAL
| SEQUENCE
| SETTER
| SHORT
| STATIC
| STRINGIFIER
| JSONIFIER
| TRUE
| TYPEDEF
| UNSIGNED
| VOID
"""
pass
def p_OtherOrComma(self, p):
"""
OtherOrComma : Other
| COMMA
"""
pass
def p_TypeSingleType(self, p):
"""
Type : SingleType
"""
p[0] = p[1]
def p_TypeUnionType(self, p):
"""
Type : UnionType TypeSuffix
"""
p[0] = self.handleModifiers(p[1], p[2])
def p_SingleTypeNonAnyType(self, p):
"""
SingleType : NonAnyType
"""
p[0] = p[1]
def p_SingleTypeAnyType(self, p):
"""
SingleType : ANY TypeSuffixStartingWithArray
"""
p[0] = self.handleModifiers(BuiltinTypes[IDLBuiltinType.Types.any], p[2])
def p_UnionType(self, p):
"""
UnionType : LPAREN UnionMemberType OR UnionMemberType UnionMemberTypes RPAREN
"""
types = [p[2], p[4]]
types.extend(p[5])
p[0] = IDLUnionType(self.getLocation(p, 1), types)
def p_UnionMemberTypeNonAnyType(self, p):
"""
UnionMemberType : NonAnyType
"""
p[0] = p[1]
def p_UnionMemberTypeArrayOfAny(self, p):
"""
UnionMemberTypeArrayOfAny : ANY LBRACKET RBRACKET
"""
p[0] = IDLArrayType(self.getLocation(p, 2),
BuiltinTypes[IDLBuiltinType.Types.any])
def p_UnionMemberType(self, p):
"""
UnionMemberType : UnionType TypeSuffix
| UnionMemberTypeArrayOfAny TypeSuffix
"""
p[0] = self.handleModifiers(p[1], p[2])
def p_UnionMemberTypes(self, p):
"""
UnionMemberTypes : OR UnionMemberType UnionMemberTypes
"""
p[0] = [p[2]]
p[0].extend(p[3])
def p_UnionMemberTypesEmpty(self, p):
"""
UnionMemberTypes :
"""
p[0] = []
def p_NonAnyType(self, p):
"""
NonAnyType : PrimitiveOrStringType TypeSuffix
| ARRAYBUFFER TypeSuffix
| OBJECT TypeSuffix
"""
if p[1] == "object":
type = BuiltinTypes[IDLBuiltinType.Types.object]
elif p[1] == "ArrayBuffer":
type = BuiltinTypes[IDLBuiltinType.Types.ArrayBuffer]
else:
type = BuiltinTypes[p[1]]
p[0] = self.handleModifiers(type, p[2])
def p_NonAnyTypeSequenceType(self, p):
"""
NonAnyType : SEQUENCE LT Type GT Null
"""
innerType = p[3]
type = IDLSequenceType(self.getLocation(p, 1), innerType)
if p[5]:
type = IDLNullableType(self.getLocation(p, 5), type)
p[0] = type
def p_NonAnyTypeScopedName(self, p):
"""
NonAnyType : ScopedName TypeSuffix
"""
assert isinstance(p[1], IDLUnresolvedIdentifier)
type = None
try:
if self.globalScope()._lookupIdentifier(p[1]):
obj = self.globalScope()._lookupIdentifier(p[1])
if obj.isType():
type = obj
else:
type = IDLWrapperType(self.getLocation(p, 1), p[1])
p[0] = self.handleModifiers(type, p[2])
return
except:
pass
type = IDLUnresolvedType(self.getLocation(p, 1), p[1])
p[0] = self.handleModifiers(type, p[2])
def p_NonAnyTypeDate(self, p):
"""
NonAnyType : DATE TypeSuffix
"""
p[0] = self.handleModifiers(BuiltinTypes[IDLBuiltinType.Types.date],
p[2])
def p_ConstType(self, p):
"""
ConstType : PrimitiveOrStringType Null
"""
type = BuiltinTypes[p[1]]
if p[2]:
type = IDLNullableType(self.getLocation(p, 1), type)
p[0] = type
def p_ConstTypeIdentifier(self, p):
"""
ConstType : IDENTIFIER Null
"""
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 1), p[1])
type = IDLUnresolvedType(self.getLocation(p, 1), identifier)
if p[2]:
type = IDLNullableType(self.getLocation(p, 1), type)
p[0] = type
def p_PrimitiveOrStringTypeUint(self, p):
"""
PrimitiveOrStringType : UnsignedIntegerType
"""
p[0] = p[1]
def p_PrimitiveOrStringTypeBoolean(self, p):
"""
PrimitiveOrStringType : BOOLEAN
"""
p[0] = IDLBuiltinType.Types.boolean
def p_PrimitiveOrStringTypeByte(self, p):
"""
PrimitiveOrStringType : BYTE
"""
p[0] = IDLBuiltinType.Types.byte
def p_PrimitiveOrStringTypeOctet(self, p):
"""
PrimitiveOrStringType : OCTET
"""
p[0] = IDLBuiltinType.Types.octet
def p_PrimitiveOrStringTypeFloat(self, p):
"""
PrimitiveOrStringType : FLOAT
"""
p[0] = IDLBuiltinType.Types.float
def p_PrimitiveOrStringTypeUnrestictedFloat(self, p):
"""
PrimitiveOrStringType : UNRESTRICTED FLOAT
"""
p[0] = IDLBuiltinType.Types.unrestricted_float
def p_PrimitiveOrStringTypeDouble(self, p):
"""
PrimitiveOrStringType : DOUBLE
"""
p[0] = IDLBuiltinType.Types.double
def p_PrimitiveOrStringTypeUnrestictedDouble(self, p):
"""
PrimitiveOrStringType : UNRESTRICTED DOUBLE
"""
p[0] = IDLBuiltinType.Types.unrestricted_double
def p_PrimitiveOrStringTypeDOMString(self, p):
"""
PrimitiveOrStringType : DOMSTRING
"""
p[0] = IDLBuiltinType.Types.domstring
def p_PrimitiveOrStringTypeBytestring(self, p):
"""
PrimitiveOrStringType : BYTESTRING
"""
p[0] = IDLBuiltinType.Types.bytestring
def p_UnsignedIntegerTypeUnsigned(self, p):
"""
UnsignedIntegerType : UNSIGNED IntegerType
"""
p[0] = p[2] + 1 # Adding one to a given signed integer type
# gets you the unsigned type.
def p_UnsignedIntegerType(self, p):
"""
UnsignedIntegerType : IntegerType
"""
p[0] = p[1]
def p_IntegerTypeShort(self, p):
"""
IntegerType : SHORT
"""
p[0] = IDLBuiltinType.Types.short
def p_IntegerTypeLong(self, p):
"""
IntegerType : LONG OptionalLong
"""
if p[2]:
p[0] = IDLBuiltinType.Types.long_long
else:
p[0] = IDLBuiltinType.Types.long
def p_OptionalLong(self, p):
"""
OptionalLong : LONG
"""
p[0] = True
def p_OptionalLongEmpty(self, p):
"""
OptionalLong :
"""
p[0] = False
def p_TypeSuffixBrackets(self, p):
"""
TypeSuffix : LBRACKET RBRACKET TypeSuffix
"""
p[0] = [(IDLMethod.TypeSuffixModifier.Brackets, self.getLocation(p, 1))]
p[0].extend(p[3])
def p_TypeSuffixQMark(self, p):
"""
TypeSuffix : QUESTIONMARK TypeSuffixStartingWithArray
"""
p[0] = [(IDLMethod.TypeSuffixModifier.QMark, self.getLocation(p, 1))]
p[0].extend(p[2])
def p_TypeSuffixEmpty(self, p):
"""
TypeSuffix :
"""
p[0] = []
def p_TypeSuffixStartingWithArray(self, p):
"""
TypeSuffixStartingWithArray : LBRACKET RBRACKET TypeSuffix
"""
p[0] = [(IDLMethod.TypeSuffixModifier.Brackets, self.getLocation(p, 1))]
p[0].extend(p[3])
def p_TypeSuffixStartingWithArrayEmpty(self, p):
"""
TypeSuffixStartingWithArray :
"""
p[0] = []
def p_Null(self, p):
"""
Null : QUESTIONMARK
|
"""
if len(p) > 1:
p[0] = True
else:
p[0] = False
def p_ReturnTypeType(self, p):
"""
ReturnType : Type
"""
p[0] = p[1]
def p_ReturnTypeVoid(self, p):
"""
ReturnType : VOID
"""
p[0] = BuiltinTypes[IDLBuiltinType.Types.void]
def p_ScopedName(self, p):
"""
ScopedName : AbsoluteScopedName
| RelativeScopedName
"""
p[0] = p[1]
def p_AbsoluteScopedName(self, p):
"""
AbsoluteScopedName : SCOPE IDENTIFIER ScopedNameParts
"""
assert False
pass
def p_RelativeScopedName(self, p):
"""
RelativeScopedName : IDENTIFIER ScopedNameParts
"""
assert not p[2] # Not implemented!
p[0] = IDLUnresolvedIdentifier(self.getLocation(p, 1), p[1])
def p_ScopedNameParts(self, p):
"""
ScopedNameParts : SCOPE IDENTIFIER ScopedNameParts
"""
assert False
pass
def p_ScopedNamePartsEmpty(self, p):
"""
ScopedNameParts :
"""
p[0] = None
def p_ExtendedAttributeNoArgs(self, p):
"""
ExtendedAttributeNoArgs : IDENTIFIER
"""
p[0] = (p[1],)
def p_ExtendedAttributeArgList(self, p):
"""
ExtendedAttributeArgList : IDENTIFIER LPAREN ArgumentList RPAREN
"""
p[0] = (p[1], p[3])
def p_ExtendedAttributeIdent(self, p):
"""
ExtendedAttributeIdent : IDENTIFIER EQUALS STRING
| IDENTIFIER EQUALS IDENTIFIER
"""
p[0] = (p[1], p[3])
def p_ExtendedAttributeNamedArgList(self, p):
"""
ExtendedAttributeNamedArgList : IDENTIFIER EQUALS IDENTIFIER LPAREN ArgumentList RPAREN
"""
p[0] = (p[1], p[3], p[5])
def p_error(self, p):
if not p:
raise WebIDLError("Syntax Error at end of file. Possibly due to missing semicolon(;), braces(}) or both",
[self._filename])
else:
raise WebIDLError("invalid syntax", [Location(self.lexer, p.lineno, p.lexpos, self._filename)])
def __init__(self, outputdir='', lexer=None):
Tokenizer.__init__(self, outputdir, lexer)
self.parser = yacc.yacc(module=self,
outputdir=outputdir,
tabmodule='webidlyacc',
errorlog=yacc.NullLogger(),
picklefile='WebIDLGrammar.pkl')
self._globalScope = IDLScope(BuiltinLocation("<Global Scope>"), None, None)
self._installBuiltins(self._globalScope)
self._productions = []
self._filename = "<builtin>"
self.lexer.input(Parser._builtins)
self._filename = None
self.parser.parse(lexer=self.lexer,tracking=True)
def _installBuiltins(self, scope):
assert isinstance(scope, IDLScope)
# xrange omits the last value.
for x in xrange(IDLBuiltinType.Types.ArrayBuffer, IDLBuiltinType.Types.Float64Array + 1):
builtin = BuiltinTypes[x]
name = builtin.name
typedef = IDLTypedefType(BuiltinLocation("<builtin type>"), builtin, name)
typedef.resolve(scope)
@ staticmethod
def handleModifiers(type, modifiers):
for (modifier, modifierLocation) in modifiers:
assert modifier == IDLMethod.TypeSuffixModifier.QMark or \
modifier == IDLMethod.TypeSuffixModifier.Brackets
if modifier == IDLMethod.TypeSuffixModifier.QMark:
type = IDLNullableType(modifierLocation, type)
elif modifier == IDLMethod.TypeSuffixModifier.Brackets:
type = IDLArrayType(modifierLocation, type)
return type
def parse(self, t, filename=None):
self.lexer.input(t)
#for tok in iter(self.lexer.token, None):
# print tok
self._filename = filename
self._productions.extend(self.parser.parse(lexer=self.lexer,tracking=True))
self._filename = None
def finish(self):
# First, finish all the IDLImplementsStatements. In particular, we
# have to make sure we do those before we do the IDLInterfaces.
# XXX khuey hates this bit and wants to nuke it from orbit.
implementsStatements = [ p for p in self._productions if
isinstance(p, IDLImplementsStatement)]
otherStatements = [ p for p in self._productions if
not isinstance(p, IDLImplementsStatement)]
for production in implementsStatements:
production.finish(self.globalScope())
for production in otherStatements:
production.finish(self.globalScope())
# Do any post-finish validation we need to do
for production in self._productions:
production.validate()
# De-duplicate self._productions, without modifying its order.
seen = set()
result = []
for p in self._productions:
if p not in seen:
seen.add(p)
result.append(p)
return result
def reset(self):
return Parser(lexer=self.lexer)
# Builtin IDL defined by WebIDL
_builtins = """
typedef unsigned long long DOMTimeStamp;
"""
def main():
# Parse arguments.
from optparse import OptionParser
usageString = "usage: %prog [options] files"
o = OptionParser(usage=usageString)
o.add_option("--cachedir", dest='cachedir', default=None,
help="Directory in which to cache lex/parse tables.")
o.add_option("--verbose-errors", action='store_true', default=False,
help="When an error happens, display the Python traceback.")
(options, args) = o.parse_args()
if len(args) < 1:
o.error(usageString)
fileList = args
baseDir = os.getcwd()
# Parse the WebIDL.
parser = Parser(options.cachedir)
try:
for filename in fileList:
fullPath = os.path.normpath(os.path.join(baseDir, filename))
f = open(fullPath, 'rb')
lines = f.readlines()
f.close()
print fullPath
parser.parse(''.join(lines), fullPath)
parser.finish()
except WebIDLError, e:
if options.verbose_errors:
traceback.print_exc()
else:
print e
if __name__ == '__main__':
main()
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