auto merge of #4882 : chmanchester/servo/stringifiers, r=Ms2ger

2 files changed, 61 insertions, 31 deletions

diff --git a/components/script/dom/bindings/codegen/CodegenRust.py b/components/script/dom/bindings/codegen/CodegenRust.py
index ebac6455b1f..29a81f771af 100644
--- a/components/script/dom/bindings/codegen/CodegenRust.py
+++ b/components/script/dom/bindings/codegen/CodegenRust.py
@@ -68,6 +68,13 @@ def stripTrailingWhitespace(text):
     return '\n'.join(lines) + tail
 
 def MakeNativeName(name):
+    # The gecko counterpart to this file uses the BinaryName machinery
+    # for this purpose (#4435 is the servo issue for BinaryName).
+    replacements = {
+        "__stringifier": "Stringify",
+    }
+    if name in replacements:
+        return replacements[name]
     return name[0].upper() + name[1:]
 
 builtinNames = {
@@ -1218,13 +1225,25 @@ class MethodDefiner(PropertyDefiner):
                                  "length": 0,
                                  "flags": "JSPROP_ENUMERATE" })
 
+        if not static:
+            stringifier = descriptor.operations['Stringifier']
+            if stringifier:
+                self.regular.append({
+                    "name": "toString",
+                    "nativeName": stringifier.identifier.name,
+                    "length": 0,
+                    "flags": "JSPROP_ENUMERATE"
+                })
+
+
     def generateArray(self, array, name):
         if len(array) == 0:
             return ""
 
         def specData(m):
             if m.get("methodInfo", True):
-                jitinfo = ("&%s_methodinfo" % m["name"])
+                identifier = m.get("nativeName", m["name"])
+                jitinfo = "&%s_methodinfo" % identifier
                 accessor = "genericMethod as NonNullJSNative"
             else:
                 jitinfo = "0 as *const JSJitInfo"
@@ -4100,8 +4119,8 @@ class CGInterfaceTrait(CGThing):
 
         def members():
             for m in descriptor.interface.members:
-                if m.isMethod() and not m.isStatic() \
-                        and not m.isIdentifierLess():
+                if (m.isMethod() and not m.isStatic() and
+                    (not m.isIdentifierLess() or m.isStringifier())):
                     name = CGSpecializedMethod.makeNativeName(descriptor, m)
                     infallible = 'infallible' in descriptor.getExtendedAttributes(m)
                     for idx, (rettype, arguments) in enumerate(m.signatures()):
@@ -4169,7 +4188,8 @@ class CGDescriptor(CGThing):
         (hasMethod, hasGetter, hasLenientGetter,
          hasSetter, hasLenientSetter) = False, False, False, False, False
         for m in descriptor.interface.members:
-            if m.isMethod() and not m.isIdentifierLess():
+            if (m.isMethod() and
+                (not m.isIdentifierLess() or m == descriptor.operations["Stringifier"])):
                 if m.isStatic():
                     assert descriptor.interface.hasInterfaceObject()
                     cgThings.append(CGStaticMethod(descriptor, m))
@@ -4178,6 +4198,11 @@ class CGDescriptor(CGThing):
                     cgThings.append(CGMemberJITInfo(descriptor, m))
                     hasMethod = True
             elif m.isAttr():
+                if m.stringifier:
+                    raise TypeError("Stringifier attributes not supported yet. "
+                                    "See bug 824857.\n"
+                                    "%s" % m.location)
+
                 if m.isStatic():
                     assert descriptor.interface.hasInterfaceObject()
                     cgThings.append(CGStaticGetter(descriptor, m))
diff --git a/components/script/dom/bindings/codegen/Configuration.py b/components/script/dom/bindings/codegen/Configuration.py
index 22efa56f6d7..8944070f09c 100644
--- a/components/script/dom/bindings/codegen/Configuration.py
+++ b/components/script/dom/bindings/codegen/Configuration.py
@@ -166,28 +166,37 @@ class Descriptor(DescriptorProvider):
         # If we're concrete, we need to crawl our ancestor interfaces and mark
         # them as having a concrete descendant.
         self.concrete = desc.get('concrete', True)
+
+        self.operations = {
+            'IndexedGetter': None,
+            'IndexedSetter': None,
+            'IndexedCreator': None,
+            'IndexedDeleter': None,
+            'NamedGetter': None,
+            'NamedSetter': None,
+            'NamedCreator': None,
+            'NamedDeleter': None,
+            'Stringifier': None,
+        }
+
+        def addOperation(operation, m):
+            if not self.operations[operation]:
+                self.operations[operation] = m
+
+        # Since stringifiers go on the prototype, we only need to worry
+        # about our own stringifier, not those of our ancestor interfaces.
+        for m in self.interface.members:
+            if m.isMethod() and m.isStringifier():
+                addOperation('Stringifier', m)
+
         if self.concrete:
             self.proxy = False
-            operations = {
-                'IndexedGetter': None,
-                'IndexedSetter': None,
-                'IndexedCreator': None,
-                'IndexedDeleter': None,
-                'NamedGetter': None,
-                'NamedSetter': None,
-                'NamedCreator': None,
-                'NamedDeleter': None,
-                'Stringifier': None
-            }
             iface = self.interface
             while iface:
                 for m in iface.members:
                     if not m.isMethod():
                         continue
 
-                    def addOperation(operation, m):
-                        if not operations[operation]:
-                            operations[operation] = m
                     def addIndexedOrNamedOperation(operation, m):
                         self.proxy = True
                         if m.isIndexed():
@@ -196,24 +205,20 @@ class Descriptor(DescriptorProvider):
                             assert m.isNamed()
                             operation = 'Named' + operation
                         addOperation(operation, m)
-                        
-                    if m.isStringifier():
-                        addOperation('Stringifier', m)
-                    else:
-                        if m.isGetter():
-                            addIndexedOrNamedOperation('Getter', m)
-                        if m.isSetter():
-                            addIndexedOrNamedOperation('Setter', m)
-                        if m.isCreator():
-                            addIndexedOrNamedOperation('Creator', m)
-                        if m.isDeleter():
-                            addIndexedOrNamedOperation('Deleter', m)
+
+                    if m.isGetter():
+                        addIndexedOrNamedOperation('Getter', m)
+                    if m.isSetter():
+                        addIndexedOrNamedOperation('Setter', m)
+                    if m.isCreator():
+                        addIndexedOrNamedOperation('Creator', m)
+                    if m.isDeleter():
+                        addIndexedOrNamedOperation('Deleter', m)
 
                 iface.setUserData('hasConcreteDescendant', True)
                 iface = iface.parent
 
             if self.proxy:
-                self.operations = operations
                 iface = self.interface
                 while iface:
                     iface.setUserData('hasProxyDescendant', True)