Move Iterable.h and Maplike.h to bindings/core/v8/

Source/core/dom/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);
-    }
-
-    Iterator* valuesForBinding(ScriptState* scriptState, ExceptionState& exceptionState)
-    {
-        IterationSource* source = this->startIteration(scriptState, exceptionState);
-        if (!source)
-            return nullptr;
-        return new IterableIterator<ValueSelector>(source);
-    }
-
-    Iterator* entriesForBinding(ScriptState* scriptState, ExceptionState& exceptionState)
-    {
-        IterationSource* source = this->startIteration(scriptState, exceptionState);
-        if (!source)
-            return nullptr;
-        return new IterableIterator<EntrySelector>(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());
-        v8::Local<v8::Function> v8Callback(callback.v8Value().As<v8::Function>());
-        v8::Local<v8::Value> v8ThisArg(thisArg.v8Value());
-        v8::Local<v8::Value> args[3];
-
-        args[2] = thisValue.v8Value();
-
-        while (true) {
-            KeyType key;
-            ValueType value;
-
-            if (!source->next(scriptState, key, value, exceptionState))
-                return;
-
-            ASSERT(!exceptionState.hadException());
-
-            args[0] = toV8(value, creationContext, isolate);
-            args[1] = toV8(key, creationContext, isolate);
-
-            V8ScriptRunner::callFunction(v8Callback, scriptState->executionContext(), v8ThisArg, 3, args, isolate);
-
-            if (tryCatch.HasCaught()) {
-                exceptionState.rethrowV8Exception(tryCatch.Exception());
-                return;
-            }
-        }
-    }
-
-    class IterationSource : public GarbageCollectedFinalized<IterationSource> {
-    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;
-
-        virtual void trace(Visitor*) { }
-    };
-
-private:
-    virtual IterationSource* startIteration(ScriptState*, ExceptionState&) = 0;
-
-    struct KeySelector {
-        static const KeyType& select(ScriptState*, const KeyType& key, const ValueType& value)
-        {
-            return key;
-        }
-    };
-    struct ValueSelector {
-        static const ValueType& select(ScriptState*, const KeyType& key, const ValueType& value)
-        {
-            return value;
-        }
-    };
-    struct EntrySelector {
-        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>
-    class IterableIterator final : public Iterator {
-    public:
-        explicit IterableIterator(IterationSource* source)
-            : m_source(source)
-        {
-        }
-
-        ScriptValue next(ScriptState* scriptState, ExceptionState& exceptionState) override
-        {
-            KeyType key;
-            ValueType value;
-
-            if (!m_source->next(scriptState, key, value, exceptionState))
-                return v8IteratorResultDone(scriptState);
-
-            return v8IteratorResult(scriptState, Selector::select(scriptState, key, value));
-        }
-
-        ScriptValue next(ScriptState* scriptState, ScriptValue, ExceptionState& exceptionState) override
-        {
-            return next(scriptState, exceptionState);
-        }
-
-        void trace(Visitor* visitor) override
-        {
-            visitor->trace(m_source);
-            Iterator::trace(visitor);
-        }
-
-    private:
-        Member<IterationSource> m_source;
-    };
-};
-
-// 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);
-    }
-
-    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.
-        // Otherwise: set |value| and return true.
-        // Note: |this->m_index| is the index being accessed.
-        virtual bool next(ScriptState*, ValueType&, ExceptionState&) = 0;
-
-    protected:
-        unsigned m_index;
-
-    private:
-        bool next(ScriptState* scriptState, unsigned& key, ValueType& value, ExceptionState& exceptionState) final
-        {
-            if (!next(scriptState, value, exceptionState))
-                return false;
-            key = m_index;
-            ++m_index;
-            return true;
-        }
-    };
-};
-
-// Utiltity mixin base-class for classes implementing IDL interfaces with "iterable<T1, T2>".
-template <typename KeyType, typename ValueType>
-class PairIterable : public Iterable<KeyType, ValueType> {
-public:
-    Iterator* iterator(ScriptState* scriptState, ExceptionState& exceptionState)
-    {
-        return this->entriesForBinding(scriptState, exceptionState);
-    }
-};
-
-} // namespace blink
-
-#endif // Iterable_h