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3b19e0751d
Another implementation option would be to put all the dictionaries in a single file and have a static global set of ids which works across all dictionaries and is initialized once at startup or so. That would also handle cross-file dictionary inheritance better. One problem that remains is the fake descriptor business. At the moment this does not allow interface types inside dictionaries. We could probably work around this by either refactoring code to make it possible to get the declType independently of the actual conversion template (whether because it lives in a separate function or because the conversion template generator knows to just return an empty string when the fake descriptor provirder is passed) or by figuring out a way to pass an actual descriptor provider to dictionary codegen.
191 lines
8.0 KiB
Python
191 lines
8.0 KiB
Python
# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this file,
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# You can obtain one at http://mozilla.org/MPL/2.0/.
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autogenerated_comment = "/* THIS FILE IS AUTOGENERATED - DO NOT EDIT */\n"
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class Configuration:
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"""
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Represents global configuration state based on IDL parse data and
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the configuration file.
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"""
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def __init__(self, filename, parseData):
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# Read the configuration file.
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glbl = {}
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execfile(filename, glbl)
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config = glbl['DOMInterfaces']
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# Build descriptors for all the interfaces we have in the parse data.
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# This allows callers to specify a subset of interfaces by filtering
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# |parseData|.
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self.descriptors = []
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self.interfaces = {}
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self.maxProtoChainLength = 0;
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for thing in parseData:
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if not thing.isInterface(): continue
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iface = thing
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if iface.identifier.name not in config: continue
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self.interfaces[iface.identifier.name] = iface
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entry = config[iface.identifier.name]
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if not isinstance(entry, list):
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assert isinstance(entry, dict)
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entry = [entry]
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self.descriptors.extend([Descriptor(self, iface, x) for x in entry])
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# Mark the descriptors for which only a single nativeType implements
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# an interface.
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for descriptor in self.descriptors:
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intefaceName = descriptor.interface.identifier.name
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otherDescriptors = [d for d in self.descriptors
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if d.interface.identifier.name == intefaceName]
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descriptor.uniqueImplementation = len(otherDescriptors) == 1
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self.enums = [e for e in parseData if e.isEnum()]
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self.dictionaries = [d for d in parseData if d.isDictionary()]
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# Keep the descriptor list sorted for determinism.
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self.descriptors.sort(lambda x,y: cmp(x.name, y.name))
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def getInterface(self, ifname):
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return self.interfaces[ifname]
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def getDescriptors(self, **filters):
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"""Gets the descriptors that match the given filters."""
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curr = self.descriptors
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for key, val in filters.iteritems():
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if key == 'webIDLFile':
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getter = lambda x: x.interface.filename()
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elif key == 'hasInterfaceObject':
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getter = lambda x: (not x.interface.isExternal() and
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x.interface.hasInterfaceObject())
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elif key == 'hasInterfacePrototypeObject':
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getter = lambda x: (not x.interface.isExternal() and
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x.interface.hasInterfacePrototypeObject())
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elif key == 'hasInterfaceOrInterfacePrototypeObject':
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getter = lambda x: x.hasInterfaceOrInterfacePrototypeObject()
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elif key == 'isCallback':
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getter = lambda x: x.interface.isCallback()
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elif key == 'isExternal':
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getter = lambda x: x.interface.isExternal()
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else:
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getter = lambda x: getattr(x, key)
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curr = filter(lambda x: getter(x) == val, curr)
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return curr
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def getEnums(self, webIDLFile):
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return filter(lambda e: e.filename() == webIDLFile, self.enums)
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def getDictionaries(self, webIDLFile):
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return filter(lambda d: d.filename() == webIDLFile, self.dictionaries)
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class Descriptor:
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"""
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Represents a single descriptor for an interface. See Bindings.conf.
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"""
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def __init__(self, config, interface, desc):
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self.config = config
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self.interface = interface
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# Read the desc, and fill in the relevant defaults.
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self.nativeType = desc['nativeType']
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self.hasInstanceInterface = desc.get('hasInstanceInterface', None)
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headerDefault = self.nativeType
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headerDefault = headerDefault.split("::")[-1] + ".h"
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self.headerFile = desc.get('headerFile', headerDefault)
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castableDefault = not self.interface.isCallback()
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self.castable = desc.get('castable', castableDefault)
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self.notflattened = desc.get('notflattened', False)
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self.register = desc.get('register', True)
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# If we're concrete, we need to crawl our ancestor interfaces and mark
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# them as having a concrete descendant.
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self.concrete = desc.get('concrete', True)
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if self.concrete:
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iface = self.interface
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while iface:
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iface.setUserData('hasConcreteDescendant', True)
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iface = iface.parent
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self.prefable = desc.get('prefable', False)
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self.workers = desc.get('workers', False)
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self.nativeIsISupports = not self.workers
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self.customTrace = desc.get('customTrace', self.workers)
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self.customFinalize = desc.get('customFinalize', self.workers)
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def make_name(name):
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return name + "_workers" if self.workers else name
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self.name = make_name(interface.identifier.name)
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# self.extendedAttributes is a dict of dicts, keyed on
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# all/getterOnly/setterOnly and then on member name. Values are an
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# array of extended attributes.
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self.extendedAttributes = { 'all': {}, 'getterOnly': {}, 'setterOnly': {} }
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def addExtendedAttribute(attribute, config):
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def add(key, members, attribute):
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for member in members:
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self.extendedAttributes[key].setdefault(member, []).append(attribute)
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if isinstance(config, dict):
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for key in ['all', 'getterOnly', 'setterOnly']:
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add(key, config.get(key, []), attribute)
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elif isinstance(config, list):
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add('all', config, attribute)
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else:
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assert isinstance(config, string)
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add('all', [config], attribute)
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for attribute in ['infallible', 'implicitJSContext', 'resultNotAddRefed']:
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addExtendedAttribute(attribute, desc.get(attribute, {}))
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self.binaryNames = desc.get('binaryNames', {})
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# Build the prototype chain.
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self.prototypeChain = []
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parent = interface
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while parent:
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self.prototypeChain.insert(0, make_name(parent.identifier.name))
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parent = parent.parent
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config.maxProtoChainLength = max(config.maxProtoChainLength,
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len(self.prototypeChain))
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def hasInterfaceOrInterfacePrototypeObject(self):
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# Forward-declared interfaces don't need either interface object or
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# interface prototype object as they're going to use QI (on main thread)
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# or be passed as a JSObject (on worker threads).
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if self.interface.isExternal():
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return False
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return self.interface.hasInterfaceObject() or self.interface.hasInterfacePrototypeObject()
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def getDescriptor(self, interfaceName):
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"""
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Gets the appropriate descriptor for the given interface name given the
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context of the current descriptor. This selects the appropriate
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implementation for cases like workers.
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"""
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iface = self.config.getInterface(interfaceName)
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descriptors = self.config.getDescriptors(interface=iface)
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# The only filter we currently have is workers vs non-workers.
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matches = filter(lambda x: x.workers is self.workers, descriptors)
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# After filtering, we should have exactly one result.
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if len(matches) is not 1:
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raise TypeError("For " + interfaceName + " found " +
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str(len(matches)) + " matches");
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return matches[0]
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def getExtendedAttributes(self, member, getter=False, setter=False):
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name = member.identifier.name
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if member.isMethod():
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return self.extendedAttributes['all'].get(name, [])
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assert member.isAttr()
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assert bool(getter) != bool(setter)
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key = 'getterOnly' if getter else 'setterOnly'
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return self.extendedAttributes['all'].get(name, []) + self.extendedAttributes[key].get(name, [])
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