Bug 1309147 - Part 3: Implement the support for CEReactions in Codegen.

Tag UXP Issue #1344

dom/bindings/BindingUtils.cpp

@@ -16,6 +16,7 @@
 #include "mozilla/SizePrintfMacros.h"
 #include "mozilla/Unused.h"
 #include "mozilla/UseCounter.h"
+#include "mozilla/dom/DocGroup.h"
 
 #include "AccessCheck.h"
 #include "jsfriendapi.h"
@@ -3405,6 +3406,28 @@ GetDesiredProto(JSContext* aCx, const JS::CallArgs& aCallArgs,
   return true;
 }
 
+CustomElementReactionsStack*
+GetCustomElementReactionsStack(JS::Handle<JSObject*> aObj)
+{
+  // This might not be the right object, if there are wrappers. Unwrap if we can.
+  JSObject* obj = js::CheckedUnwrap(aObj);
+  if (!obj) {
+    return nullptr;
+  }
+
+  nsGlobalWindow* window = xpc::WindowGlobalOrNull(obj);
+  if (!window) {
+    return nullptr;
+  }
+
+  DocGroup* docGroup = window->AsInner()->GetDocGroup();
+  if (!docGroup) {
+    return nullptr;
+  }
+
+  return docGroup->CustomElementReactionsStack();
+}
+
 // https://html.spec.whatwg.org/multipage/dom.html#htmlconstructor
 already_AddRefed<nsGenericHTMLElement>
 CreateHTMLElement(const GlobalObject& aGlobal, const JS::CallArgs& aCallArgs,

dom/bindings/BindingUtils.h

@@ -50,6 +50,7 @@ namespace mozilla {
 enum UseCounter : int16_t;
 
 namespace dom {
+class CustomElementReactionsStack;
 template<typename KeyType, typename ValueType> class Record;
 
 nsresult
@@ -3421,6 +3422,12 @@ bool
 GetDesiredProto(JSContext* aCx, const JS::CallArgs& aCallArgs,
                 JS::MutableHandle<JSObject*> aDesiredProto);
 
+// Get the CustomElementReactionsStack for the docgroup of the global
+// of the underlying object of aObj.  This can be null if aObj can't
+// be CheckUnwrapped, or if the global of the result has no docgroup
+// (e.g. because it's not a Window global).
+CustomElementReactionsStack*
+GetCustomElementReactionsStack(JS::Handle<JSObject*> aObj);
 // This function is expected to be called from the constructor function for an
 // HTML element interface; the global/callargs need to be whatever was passed to
 // that constructor function.

dom/bindings/Bindings.conf

@@ -1643,6 +1643,10 @@ DOMInterfaces = {
         'register': False,
         },
 
+'TestCEReactionsInterface' : {
+        'headerFile': 'TestBindingHeader.h',
+        'register': False,
+        },
 }
 
 # These are temporary, until they've been converted to use new DOM bindings

dom/bindings/Codegen.py

@@ -7672,6 +7672,17 @@ class CGPerSignatureCall(CGThing):
                 CGIfWrapper(CGList(xraySteps),
                             "objIsXray"))
 
+        if (idlNode.getExtendedAttribute('CEReactions') is not None and
+            not getter):
+            cgThings.append(CGGeneric(fill(
+                """
+                CustomElementReactionsStack* reactionsStack = GetCustomElementReactionsStack(${obj});
+                Maybe<AutoCEReaction> ceReaction;
+                if (reactionsStack) {
+                  ceReaction.emplace(reactionsStack);
+                }
+                """, obj=objectName)))
+
         # If this is a method that was generated by a maplike/setlike
         # interface, use the maplike/setlike generator to fill in the body.
         # Otherwise, use CGCallGenerator to call the native method.
@@ -13840,12 +13851,18 @@ class CGBindingRoot(CGThing):
             iface = desc.interface
             return any(m.getExtendedAttribute("Deprecated") for m in iface.members + [iface])
 
+        def descriptorHasCEReactions(desc):
+            iface = desc.interface
+            return any(m.getExtendedAttribute("CEReactions") for m in iface.members + [iface])
+
         bindingHeaders["nsIDocument.h"] = any(
             descriptorDeprecated(d) for d in descriptors)
         bindingHeaders["mozilla/Preferences.h"] = any(
             descriptorRequiresPreferences(d) for d in descriptors)
         bindingHeaders["mozilla/dom/DOMJSProxyHandler.h"] = any(
             d.concrete and d.proxy for d in descriptors)
+        bindingHeaders["mozilla/dom/CustomElementRegistry.h"] = any(
+            descriptorHasCEReactions(d) for d in descriptors)
 
         def descriptorHasChromeOnly(desc):
             ctor = desc.interface.ctor()

dom/bindings/test/TestBindingHeader.h

@@ -939,6 +939,11 @@ public:
   void NeedsCallerTypeMethod(CallerType);
   bool NeedsCallerTypeAttr(CallerType);
   void SetNeedsCallerTypeAttr(bool, CallerType);
+  void CeReactionsMethod();
+  void CeReactionsMethodOverload();
+  void CeReactionsMethodOverload(const nsAString&);
+  bool CeReactionsAttr() const;
+  void SetCeReactionsAttr(bool);
   int16_t LegacyCall(const JS::Value&, uint32_t, TestInterface&);
   void PassArgsWithDefaults(JSContext*, const Optional<int32_t>&,
                             TestInterface*, const Dict&, double,
@@ -1431,6 +1436,25 @@ public:
   virtual nsISupports* GetParentObject();
 };
 
+class TestCEReactionsInterface : public nsISupports,
+                                 public nsWrapperCache
+{
+public:
+  NS_DECL_ISUPPORTS
+
+  // We need a GetParentObject to make binding codegen happy
+  virtual nsISupports* GetParentObject();
+
+  int32_t Item(uint32_t);
+  uint32_t Length() const;
+  int32_t IndexedGetter(uint32_t, bool &);
+  void IndexedSetter(uint32_t, int32_t);
+  void NamedDeleter(const nsAString&, bool &);
+  void NamedGetter(const nsAString&, bool &, nsString&);
+  void NamedSetter(const nsAString&, const nsAString&);
+  void GetSupportedNames(nsTArray<nsString>&);
+};
+
 } // namespace dom
 } // namespace mozilla
 

dom/bindings/test/TestCodeGen.webidl

@@ -947,6 +947,10 @@ interface TestInterface {
   [NeedsSubjectPrincipal] attribute boolean needsSubjectPrincipalAttr;
   [NeedsCallerType] void needsCallerTypeMethod();
   [NeedsCallerType] attribute boolean needsCallerTypeAttr;
+  [CEReactions] void ceReactionsMethod();
+  [CEReactions] void ceReactionsMethodOverload();
+  [CEReactions] void ceReactionsMethodOverload(DOMString bar);
+  [CEReactions] attribute boolean ceReactionsAttr;
   legacycaller short(unsigned long arg1, TestInterface arg2);
   void passArgsWithDefaults(optional long arg1,
                             optional TestInterface? arg2 = null,
@@ -1266,3 +1270,12 @@ interface TestWorkerExposedInterface {
 [HTMLConstructor]
 interface TestHTMLConstructorInterface {
 };
+
+interface TestCEReactionsInterface {
+  [CEReactions] setter creator void (unsigned long index, long item);
+  [CEReactions] setter creator void (DOMString name, DOMString item);
+  [CEReactions] deleter void (DOMString name);
+  getter long item(unsigned long index);
+  getter DOMString (DOMString name);
+  readonly attribute unsigned long length;
+};

dom/bindings/test/TestExampleGen.webidl

@@ -777,6 +777,10 @@ interface TestExampleInterface {
   [NeedsSubjectPrincipal] attribute boolean needsSubjectPrincipalAttr;
   [NeedsCallerType] void needsCallerTypeMethod();
   [NeedsCallerType] attribute boolean needsCallerTypeAttr;
+  [CEReactions] void ceReactionsMethod();
+  [CEReactions] void ceReactionsMethodOverload();
+  [CEReactions] void ceReactionsMethodOverload(DOMString bar);
+  [CEReactions] attribute boolean ceReactionsAttr;
   legacycaller short(unsigned long arg1, TestInterface arg2);
   void passArgsWithDefaults(optional long arg1,
                             optional TestInterface? arg2 = null,

dom/bindings/test/TestJSImplGen.webidl

@@ -794,6 +794,10 @@ interface TestJSImplInterface {
   [Throws] attribute boolean throwingAttr;
   [GetterThrows] attribute boolean throwingGetterAttr;
   [SetterThrows] attribute boolean throwingSetterAttr;
+  [CEReactions] void ceReactionsMethod();
+  [CEReactions] void ceReactionsMethodOverload();
+  [CEReactions] void ceReactionsMethodOverload(DOMString bar);
+  [CEReactions] attribute boolean ceReactionsAttr;
   // NeedsSubjectPrincipal not supported on JS-implemented things for
   // now, because we always pass in the caller principal anyway.
   //  [NeedsSubjectPrincipal] void needsSubjectPrincipalMethod();