| /* |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_SCRIPT_FUNCTION_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_SCRIPT_FUNCTION_H_ |
| |
| #include "third_party/blink/renderer/bindings/core/v8/script_value.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/platform/heap/handle.h" |
| #include "v8/include/v8.h" |
| |
| namespace blink { |
| |
| // A common way of using ScriptFunction is as follows: |
| // |
| // class DerivedFunction : public ScriptFunction { |
| // // This returns a V8 function which the DerivedFunction is bound to. |
| // // The DerivedFunction is destroyed when the V8 function is |
| // // garbage-collected. |
| // static v8::Local<v8::Function> CreateFunction(ScriptState* script_state) { |
| // DerivedFunction* self = new DerivedFunction(script_state); |
| // return self->BindToV8Function(); |
| // } |
| // }; |
| class CORE_EXPORT ScriptFunction |
| : public GarbageCollectedFinalized<ScriptFunction> { |
| public: |
| virtual ~ScriptFunction() = default; |
| virtual void Trace(blink::Visitor*); |
| |
| protected: |
| explicit ScriptFunction(ScriptState* script_state) |
| : script_state_(script_state) {} |
| |
| ScriptState* GetScriptState() const { return script_state_; } |
| |
| v8::Local<v8::Function> BindToV8Function(); |
| |
| private: |
| // Subclasses should implement one of Call() or CallRaw(). Most will implement |
| // Call(). |
| virtual ScriptValue Call(ScriptValue); |
| |
| // To support more than one argument, or for low-level access to the V8 API, |
| // implement CallRaw(). The default implementation delegates to Call(). |
| virtual void CallRaw(const v8::FunctionCallbackInfo<v8::Value>&); |
| |
| static void CallCallback(const v8::FunctionCallbackInfo<v8::Value>&); |
| |
| Member<ScriptState> script_state_; |
| #if DCHECK_IS_ON() |
| // bindToV8Function must not be called twice. |
| bool bind_to_v8_function_already_called_ = false; |
| #endif |
| }; |
| |
| } // namespace blink |
| |
| #endif |