| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtWebEngine module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** GNU Lesser General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU Lesser |
| ** General Public License version 3 as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.LGPL3 included in the |
| ** packaging of this file. Please review the following information to |
| ** ensure the GNU Lesser General Public License version 3 requirements |
| ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
| ** Qt Foundation. The licenses are as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 |
| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
| ** be met: https://www.gnu.org/licenses/gpl-2.0.html and |
| ** https://www.gnu.org/licenses/gpl-3.0.html. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #ifndef QWEBENGINECALLBACK_P_H |
| #define QWEBENGINECALLBACK_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include "qtwebenginecoreglobal_p.h" |
| #include "qwebenginecallback.h" |
| |
| #include <QByteArray> |
| #include <QHash> |
| #include <QSharedData> |
| #include <QString> |
| #include <QVariant> |
| #include <type_traits> |
| |
| // keep in sync with Q_DECLARE_SHARED... in qwebenginecallback.h |
| #define FOR_EACH_TYPE(F) \ |
| F(bool) \ |
| F(int) \ |
| F(const QString &) \ |
| F(const QByteArray &) \ |
| F(const QVariant &) |
| |
| namespace QtWebEngineCore { |
| |
| class CallbackDirectory { |
| template<typename T> |
| void invokeInternal(quint64 callbackId, T result); |
| template<typename T> |
| void invokeEmptyInternal(QtWebEnginePrivate::QWebEngineCallbackPrivateBase<T> *callback); |
| |
| public: |
| ~CallbackDirectory() |
| { |
| // "Cancel" pending callbacks by calling them with an invalid value. |
| // This guarantees that each callback is called exactly once. |
| for (CallbackSharedDataPointerBase *const sharedPtrBase : m_callbackMap) { |
| Q_ASSERT(sharedPtrBase); |
| sharedPtrBase->invokeEmpty(); |
| delete sharedPtrBase; |
| } |
| } |
| |
| enum ReservedCallbackIds { |
| NoCallbackId = 0, |
| DeleteCookieCallbackId, |
| DeleteSessionCookiesCallbackId, |
| DeleteAllCookiesCallbackId, |
| GetAllCookiesCallbackId, |
| |
| // Place reserved id's before this. |
| ReservedCallbackIdsEnd |
| }; |
| |
| template<typename T> |
| void registerCallback(quint64 callbackId, const QWebEngineCallback<T> &callback); |
| |
| template<typename T> |
| void invokeEmpty(const QWebEngineCallback<T> &callback); |
| |
| #define DEFINE_INVOKE_FOR_TYPE(Type) \ |
| void invoke(quint64 callbackId, Type result) { invokeInternal<Type>(callbackId, std::forward<Type>(result)); } |
| FOR_EACH_TYPE(DEFINE_INVOKE_FOR_TYPE) |
| #undef DEFINE_INVOKE_FOR_TYPE |
| |
| template<typename A> |
| void invokeDirectly(const QWebEngineCallback<typename std::remove_reference<A>::type &> &callback, A &argument) |
| { |
| return callback.d.data()->operator()(argument); |
| } |
| |
| template<typename A> |
| void invokeDirectly(const QWebEngineCallback<typename std::remove_reference<A>::type> &callback, const A &argument) |
| { |
| return callback.d.data()->operator()(std::forward<const A &>(argument)); |
| } |
| |
| private: |
| struct CallbackSharedDataPointerBase { |
| virtual ~CallbackSharedDataPointerBase() {} |
| virtual void invokeEmpty() = 0; |
| virtual void doRef() = 0; |
| virtual void doDeref() = 0; |
| virtual operator bool() const = 0; |
| }; |
| |
| template<typename T> |
| struct CallbackSharedDataPointer : public CallbackSharedDataPointerBase { |
| CallbackDirectory *parent; |
| QtWebEnginePrivate::QWebEngineCallbackPrivateBase<T> *callback; |
| |
| ~CallbackSharedDataPointer() { doDeref(); } |
| CallbackSharedDataPointer() : parent(0), callback(0) {} |
| CallbackSharedDataPointer(const CallbackSharedDataPointer<T> &other) |
| : parent(other.parent), callback(other.callback) |
| { |
| doRef(); |
| } |
| CallbackSharedDataPointer(CallbackDirectory *p, QtWebEnginePrivate::QWebEngineCallbackPrivateBase<T> *c) |
| : parent(p), callback(c) |
| { |
| Q_ASSERT(callback); |
| doRef(); |
| } |
| |
| void invokeEmpty() override; |
| operator bool() const override { return callback; } |
| |
| private: |
| void doRef() override; |
| void doDeref() override; |
| }; |
| |
| QHash<quint64, CallbackSharedDataPointerBase *> m_callbackMap; |
| }; |
| |
| template<typename T> |
| inline void CallbackDirectory::registerCallback(quint64 callbackId, const QWebEngineCallback<T> &callback) |
| { |
| if (!callback.d) |
| return; |
| m_callbackMap.insert(callbackId, new CallbackSharedDataPointer<T>(this, callback.d.data())); |
| } |
| |
| template<typename T> |
| inline void CallbackDirectory::invokeInternal(quint64 callbackId, T result) |
| { |
| CallbackSharedDataPointerBase *const sharedPtrBase = m_callbackMap.take(callbackId); |
| if (!sharedPtrBase) |
| return; |
| |
| auto ptr = static_cast<CallbackSharedDataPointer<T> *>(sharedPtrBase); |
| Q_ASSERT(ptr); |
| (*ptr->callback)(std::forward<T>(result)); |
| delete ptr; |
| } |
| |
| template<typename T> |
| inline void CallbackDirectory::invokeEmptyInternal(QtWebEnginePrivate::QWebEngineCallbackPrivateBase<T> *callback) |
| { |
| Q_ASSERT(callback); |
| using NoRefT = typename std::remove_reference<T>::type; |
| using NoConstNoRefT = typename std::remove_const<NoRefT>::type; |
| NoConstNoRefT t; |
| (*callback)(t); |
| } |
| |
| template<> |
| inline void CallbackDirectory::invokeEmptyInternal(QtWebEnginePrivate::QWebEngineCallbackPrivateBase<bool> *callback) |
| { |
| Q_ASSERT(callback); |
| (*callback)(false); |
| } |
| |
| template<> |
| inline void CallbackDirectory::invokeEmptyInternal(QtWebEnginePrivate::QWebEngineCallbackPrivateBase<int> *callback) |
| { |
| Q_ASSERT(callback); |
| (*callback)(0); |
| } |
| |
| template<typename T> |
| inline void CallbackDirectory::invokeEmpty(const QWebEngineCallback<T> &callback) |
| { |
| if (!callback.d) |
| return; |
| |
| invokeEmptyInternal(callback.d.data()); |
| } |
| |
| template<typename T> |
| inline void CallbackDirectory::CallbackSharedDataPointer<T>::doRef() |
| { |
| if (!callback) |
| return; |
| |
| callback->ref.ref(); |
| } |
| |
| template<typename T> |
| inline void CallbackDirectory::CallbackSharedDataPointer<T>::doDeref() |
| { |
| if (!callback) |
| return; |
| if (!callback->ref.deref()) |
| delete callback; |
| } |
| |
| template<typename T> |
| inline void CallbackDirectory::CallbackSharedDataPointer<T>::invokeEmpty() |
| { |
| if (!callback) |
| return; |
| |
| Q_ASSERT(parent); |
| parent->invokeEmptyInternal(callback); |
| } |
| |
| #define CHECK_RELOCATABLE(x) Q_STATIC_ASSERT((QTypeInfoQuery<QWebEngineCallback<x>>::isRelocatable)); |
| FOR_EACH_TYPE(CHECK_RELOCATABLE) |
| #undef CHECK_RELOCATABLE |
| |
| } // namespace QtWebEngineCore |
| |
| #endif // QWEBENGINECALLBACK_P_H |