CSS Font Loading: make FontFaceSet Setlike

third_party/WebKit/Source/bindings/core/v8/Iterable.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef Iterable_h
 #define Iterable_h
 
 #include "bindings/core/v8/V8IteratorResultValue.h"
 #include "bindings/core/v8/V8ScriptRunner.h"
 #include "core/dom/Iterator.h"
 
 namespace blink {
 
 // Typically, use one of ValueIterable<> and PairIterable<> (below) instead!
 template <typename KeyType, typename ValueType>
 class Iterable {
 public:
     Iterator* keysForBinding(ScriptState* scriptState, ExceptionState& exceptionState)
     {
         IterationSource* source = this->startIteration(scriptState, exceptionState);
         if (!source)
             return nullptr;
-        return new IterableIterator<KeySelector>(source);
+        return createKeyIterator(source);
     }
 
     Iterator* valuesForBinding(ScriptState* scriptState, ExceptionState& exceptionState)
     {
         IterationSource* source = this->startIteration(scriptState, exceptionState);
         if (!source)
             return nullptr;
-        return new IterableIterator<ValueSelector>(source);
+        return createValueIterator(source);
     }
 
     Iterator* entriesForBinding(ScriptState* scriptState, ExceptionState& exceptionState)
     {
         IterationSource* source = this->startIteration(scriptState, exceptionState);
         if (!source)
             return nullptr;
-        return new IterableIterator<EntrySelector>(source);
+        return createEntryIterator(source);
     }
 
     void forEachForBinding(ScriptState* scriptState, const ScriptValue& thisValue, const ScriptValue& callback, const ScriptValue& thisArg, ExceptionState& exceptionState)
     {
         IterationSource* source = this->startIteration(scriptState, exceptionState);
 
         v8::Isolate* isolate = scriptState->isolate();
         v8::TryCatch tryCatch(isolate);
 
         v8::Local<v8::Object> creationContext(scriptState->context()->Global());
@@ skipping 32 matching lines @@
     public:
         virtual ~IterationSource() { }
 
         // If end of iteration has been reached or an exception thrown: return false.
         // Otherwise: set |key| and |value| and return true.
         virtual bool next(ScriptState*, KeyType&, ValueType&, ExceptionState&) = 0;
 
         DEFINE_INLINE_VIRTUAL_TRACE() { }
     };
 
-private:
-    virtual IterationSource* startIteration(ScriptState*, ExceptionState&) = 0;
+protected:
+    virtual Iterator* createKeyIterator(IterationSource* source) { return new IterableIterator<KeySelector>(source); }
+    virtual Iterator* createValueIterator(IterationSource* source) { return new IterableIterator<ValueSelector>(source); }
+    virtual Iterator* createEntryIterator(IterationSource* source) { return new IterableIterator<MapEntrySelector>(source); }
 
     struct KeySelector {
         STATIC_ONLY(KeySelector);
         static const KeyType& select(ScriptState*, const KeyType& key, const ValueType& value)
         {
             return key;
         }
     };
     struct ValueSelector {
         STATIC_ONLY(ValueSelector);
         static const ValueType& select(ScriptState*, const KeyType& key, const ValueType& value)
         {
             return value;
         }
     };
-    struct EntrySelector {
-        STATIC_ONLY(EntrySelector);
+    struct SetEntrySelector {
+        STATIC_ONLY(SetEntrySelector);
         static Vector<ScriptValue, 2> select(ScriptState* scriptState, const KeyType& key, const ValueType& value)
         {
             v8::Local<v8::Object> creationContext = scriptState->context()->Global();
+            v8::Isolate* isolate = scriptState->isolate();
+
+            Vector<ScriptValue, 2> entry;
+            entry.append(ScriptValue(scriptState, toV8(value, creationContext, isolate)));
+            entry.append(ScriptValue(scriptState, toV8(value, creationContext, isolate)));
+            return entry;
+        }
+    };
+    struct MapEntrySelector {
+        STATIC_ONLY(MapEntrySelector);
+        static Vector<ScriptValue, 2> select(ScriptState* scriptState, const KeyType& key, const ValueType& value)
+        {
+            v8::Local<v8::Object> creationContext = scriptState->context()->Global();
             v8::Isolate* isolate = scriptState->isolate();
 
             Vector<ScriptValue, 2> entry;
             entry.append(ScriptValue(scriptState, toV8(key, creationContext, isolate)));
             entry.append(ScriptValue(scriptState, toV8(value, creationContext, isolate)));
             return entry;
         }
     };
 
     template <typename Selector>
@@ skipping 22 matching lines @@
 
         DEFINE_INLINE_VIRTUAL_TRACE()
         {
             visitor->trace(m_source);
             Iterator::trace(visitor);
         }
 
     private:
         Member<IterationSource> m_source;
     };
+
+private:
+    virtual IterationSource* startIteration(ScriptState*, ExceptionState&) = 0;
 };
 
 // Utiltity mixin base-class for classes implementing IDL interfaces with "iterable<T>".
 template <typename ValueType>
 class ValueIterable : public Iterable<unsigned, ValueType> {
 public:
     Iterator* iterator(ScriptState* scriptState, ExceptionState& exceptionState)
     {
         return this->valuesForBinding(scriptState, exceptionState);
     }
 
+    Iterator* createKeyIterator(typename Iterable<unsigned, ValueType>::IterationSource* source) override { return this->createValueIterator(source); }
+    Iterator* createEntryIterator(typename Iterable<unsigned, ValueType>::IterationSource* source) override { return new typename Iterable<unsigned, ValueType>::template IterableIterator<typename Iterable<unsigned, ValueType>::SetEntrySelector>(source); }
+
     class IterationSource : public Iterable<unsigned, ValueType>::IterationSource {
     public:
         IterationSource()
             : m_index(0)
         {
         }
 
         ~IterationSource() override { }
 
         // If end of iteration has been reached or an exception thrown: return false.
@@ skipping 22 matching lines @@
 public:
     Iterator* iterator(ScriptState* scriptState, ExceptionState& exceptionState)
     {
         return this->entriesForBinding(scriptState, exceptionState);
     }
 };
 
 } // namespace blink
 
 #endif // Iterable_h