IDL compiler: Implement Interface.exposed_constructs

Implements Interface.exposed_constructs that returns a list of
the constructs that are exposed on the global object.

Bug: 839389
Change-Id: I1e6dbc119e3371818ed418829e530214b76d2497
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1983116Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727855}

third_party/blink/renderer/bindings/scripts/web_idl/idl_compiler.py

@@ -94,6 +94,8 @@ class IdlCompiler(object):
         self._propagate_extattrs_to_overload_group()
         self._calculate_group_exposure()
 
+        self._fill_exposed_constructs()
+
         self._sort_dictionary_members()
 
         # Updates on IRs are finished.  Create API objects.
@@ -420,6 +422,32 @@ class IdlCompiler(object):
                         ]))
                     group.exposure.set_only_in_secure_contexts(flag_names)
 
+    def _fill_exposed_constructs(self):
+        old_interfaces = self._ir_map.irs_of_kind(IRMap.IR.Kind.INTERFACE)
+        old_namespaces = self._ir_map.irs_of_kind(IRMap.IR.Kind.NAMESPACE)
+
+        exposed_map = {}  # global name: [construct's identifier...]
+        for ir in itertools.chain(old_interfaces, old_namespaces):
+            for pair in ir.exposure.global_names_and_features:
+                exposed_map.setdefault(pair.global_name,
+                                       []).append(ir.identifier)
+
+        self._ir_map.move_to_new_phase()
+
+        for old_ir in old_interfaces:
+            new_ir = make_copy(old_ir)
+            self._ir_map.add(new_ir)
+
+            assert not new_ir.exposed_constructs
+            global_names = new_ir.extended_attributes.values_of("Global")
+            if not global_names:
+                continue
+            constructs = set()
+            for global_name in global_names:
+                constructs.update(exposed_map.get(global_name, []))
+            new_ir.exposed_constructs = map(
+                self._ref_to_idl_def_factory.create, sorted(constructs))
+
     def _sort_dictionary_members(self):
         """Sorts dictionary members in alphabetical order."""
         old_irs = self._ir_map.irs_of_kind(IRMap.IR.Kind.DICTIONARY)

third_party/blink/renderer/bindings/scripts/web_idl/interface.py

@@ -102,6 +102,7 @@ class Interface(UserDefinedType, WithExtendedAttributes, WithCodeGeneratorInfo,
             self.constructor_groups = []
             self.operations = list(operations)
             self.operation_groups = []
+            self.exposed_constructs = []
             self.stringifier = stringifier
             self.iterable = iterable
             self.maplike = maplike
@@ -162,6 +163,7 @@ class Interface(UserDefinedType, WithExtendedAttributes, WithCodeGeneratorInfo,
                        self._operations),
                 owner=self) for operation_group_ir in ir.operation_groups
         ])
+        self._exposed_constructs = tuple(ir.exposed_constructs)
         self._stringifier = None
         if ir.stringifier:
             operations = filter(lambda x: x.is_stringifier, self._operations)
@@ -265,19 +267,18 @@ class Interface(UserDefinedType, WithExtendedAttributes, WithCodeGeneratorInfo,
         return self._operation_groups
 
     @property
-    def named_constructor(self):
-        """Returns a named constructor or None."""
-        assert False, "Not implemented yet."
-
-    @property
-    def exposed_interfaces(self):
+    def exposed_constructs(self):
         """
-        Returns a tuple of interfaces that are exposed to this interface, if
-        this is a global interface.  Returns None otherwise.
+        Returns a list of the constructs that are exposed on this global object.
         """
+        return tuple(
+            map(lambda ref: ref.target_object, self._exposed_constructs))
+
+    @property
+    def named_constructor(self):
+        """Returns a named constructor or None."""
         assert False, "Not implemented yet."
 
-    # Special operations
     @property
     def indexed_property_handler(self):
         """

third_party/blink/renderer/bindings/scripts/web_idl/ir_map.py

@@ -194,7 +194,7 @@ class IRMap(object):
                 accumulated.extend(irs)
             return accumulated
         else:
-            return self.find_by_kind(kind).itervalues()
+            return list(self.find_by_kind(kind).itervalues())
 
     def irs_of_kinds(self, *kinds):
         """