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Generate the TypeId enums in codegen
This commit is contained in:
Anthony Ramine
parent
55769b2fbf
commit
aab2c40389
107 changed files with 678 additions and 774 deletions
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@ -4,6 +4,8 @@
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# Common codegen classes.
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from collections import defaultdict
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import operator
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import re
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import string
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@ -1722,23 +1724,20 @@ class CGNamespace(CGWrapper):
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return CGNamespace(namespaces[0], inner, public=public)
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def EventTargetEnum(desc):
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def DOMClassTypeId(desc):
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protochain = desc.prototypeChain
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if protochain[0] != "EventTarget" or desc.interface.getExtendedAttribute("Abstract"):
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return "None"
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inner = ""
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name = desc.interface.identifier.name
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if desc.interface.getUserData("hasConcreteDescendant", False):
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inner = "(::dom::%s::%sTypeId::%s)" % (name.lower(), name, name)
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prev_proto = ""
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for proto in reversed(protochain):
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if prev_proto != "":
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inner = "(::dom::%s::%sTypeId::%s%s)" % (proto.lower(), proto, prev_proto, inner)
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prev_proto = proto
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if inner == "":
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return "None"
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return "Some%s" % inner
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if desc.hasDescendants():
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if desc.interface.getExtendedAttribute("Abstract"):
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return "::dom::bindings::codegen::InheritTypes::TopTypeId::Abstract"
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name = desc.interface.identifier.name
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inner = "(::dom::bindings::codegen::InheritTypes::%sTypeId::%s)" % (name, name)
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elif len(protochain) == 1:
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return "::dom::bindings::codegen::InheritTypes::TopTypeId::Alone"
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reversed_protochain = list(reversed(protochain))
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for (child, parent) in zip(reversed_protochain, reversed_protochain[1:]):
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inner = "(::dom::bindings::codegen::InheritTypes::%sTypeId::%s%s)" % (parent, child, inner)
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return "::dom::bindings::codegen::InheritTypes::TopTypeId::%s%s" % (protochain[0], inner)
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def DOMClass(descriptor):
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@ -1754,7 +1753,7 @@ DOMClass {
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interface_chain: [ %s ],
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native_hooks: &sNativePropertyHooks,
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type_id: %s,
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}""" % (prototypeChainString, EventTargetEnum(descriptor))
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}""" % (prototypeChainString, DOMClassTypeId(descriptor))
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class CGDOMJSClass(CGThing):
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@ -5815,23 +5814,29 @@ class GlobalGenRoots():
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def InheritTypes(config):
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descriptors = config.getDescriptors(register=True, isCallback=False)
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allprotos = [CGGeneric("use dom::types::*;\n"),
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CGGeneric("use dom::bindings::js::{JS, LayoutJS, Root};\n"),
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CGGeneric("use dom::bindings::trace::JSTraceable;\n"),
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CGGeneric("use dom::bindings::utils::Reflectable;\n"),
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CGGeneric("use js::jsapi::JSTracer;\n\n"),
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CGGeneric("use std::mem;\n\n")]
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imports = [CGGeneric("use dom::types::*;\n"),
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CGGeneric("use dom::bindings::conversions::get_dom_class;\n"),
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CGGeneric("use dom::bindings::js::{JS, LayoutJS, Root};\n"),
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CGGeneric("use dom::bindings::trace::JSTraceable;\n"),
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CGGeneric("use dom::bindings::utils::Reflectable;\n"),
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CGGeneric("use js::jsapi::JSTracer;\n\n"),
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CGGeneric("use std::mem;\n\n")]
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allprotos = []
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topTypes = []
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hierarchy = defaultdict(list)
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for descriptor in descriptors:
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name = descriptor.name
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chain = descriptor.prototypeChain
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upcast = (descriptor.interface.getUserData("hasConcreteDescendant", False) or
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descriptor.interface.getUserData("hasProxyDescendant", False))
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upcast = descriptor.hasDescendants()
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downcast = len(chain) != 1
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if upcast or downcast:
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# Define a dummy structure to hold the cast functions.
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allprotos.append(CGGeneric("pub struct %sCast;\n\n" % name))
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if upcast and not downcast:
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topTypes.append(name)
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if upcast:
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# Define a `FooBase` trait for subclasses to implement, as well as the
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# `FooCast::from_*` methods that use it.
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@ -5872,6 +5877,7 @@ impl %(name)sCast {
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allprotos.append(CGGeneric("\n"))
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if downcast:
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hierarchy[descriptor.getParentName()].append(name)
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# Define a `FooDerived` trait for superclasses to implement,
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# as well as the `FooCast::to_*` methods that use it.
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allprotos.append(CGGeneric("""\
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@ -5922,7 +5928,7 @@ impl %(name)sCast {
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'baseName': baseName,
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'derivedTrait': name + 'Derived',
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'methodName': 'is_' + name.lower(),
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'parentName': config.getDescriptor(baseName).prototypeChain[-2],
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'parentName': config.getDescriptor(baseName).getParentName(),
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}
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allprotos.append(CGGeneric("""\
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impl %(derivedTrait)s for %(baseName)s {
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@ -5934,7 +5940,54 @@ impl %(derivedTrait)s for %(baseName)s {
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""" % args))
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curr = CGList(allprotos)
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typeIdCode = []
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topTypeVariants = [
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("ID used by abstract interfaces.", "Abstract"),
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("ID used by interfaces that are not castable.", "Alone"),
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]
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topTypeVariants += [
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("ID used by interfaces that derive from %s." % name, "%s(%sTypeId)" % (name, name))
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for name in topTypes
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]
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topTypeVariantsAsStrings = [CGGeneric("/// %s\n%s," % variant) for variant in topTypeVariants]
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typeIdCode.append(CGWrapper(CGIndenter(CGList(topTypeVariantsAsStrings, "\n"), 4),
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pre="#[derive(Clone, Copy, Debug)]\npub enum TopTypeId {\n",
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post="\n}\n\n"))
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def type_id_variant(name):
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# If `name` is present in the hierarchy keys', that means some other interfaces
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# derive from it and this enum variant should have an argument with its own
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# TypeId enum.
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return "%s(%sTypeId)" % (name, name) if name in hierarchy else name
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for base, derived in hierarchy.iteritems():
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variants = []
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if not config.getInterface(base).getExtendedAttribute("Abstract"):
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variants.append(CGGeneric(base))
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variants += [CGGeneric(type_id_variant(name)) for name in derived]
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derives = "Clone, Copy, Debug"
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if base != 'EventTarget' and base != 'HTMLElement':
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derives += ", PartialEq"
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typeIdCode.append(CGWrapper(CGIndenter(CGList(variants, ",\n"), 4),
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pre="#[derive(%s)]\npub enum %sTypeId {\n" % (derives, base),
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post="\n}\n\n"))
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if base in topTypes:
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typeIdCode.append(CGGeneric("""\
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impl %(base)s {
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pub fn type_id(&self) -> &'static %(base)sTypeId {
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let domclass = unsafe {
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get_dom_class(self.reflector().get_jsobject().get()).unwrap()
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};
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match domclass.type_id {
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TopTypeId::%(base)s(ref type_id) => type_id,
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_ => unreachable!(),
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}
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}
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}
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""" % {'base': base}))
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curr = CGList(imports + typeIdCode + allprotos)
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curr = CGWrapper(curr, pre=AUTOGENERATED_WARNING_COMMENT)
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return curr
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