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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef __mozilla_WindowHook_h__
#define __mozilla_WindowHook_h__
#include <windows.h>
#include <nsHashKeys.h>
#include <nsClassHashtable.h>
#include <nsTArray.h>
#include "nsAppShell.h"
class nsWindow;
namespace mozilla {
namespace widget {
struct MSGResult;
class WindowHook {
public:
// It is expected that most callbacks will return false
typedef bool (*Callback)(void* aContext, HWND hWnd, UINT nMsg, WPARAM wParam,
LPARAM lParam, LRESULT* aResult);
nsresult AddHook(UINT nMsg, Callback callback, void* context);
nsresult RemoveHook(UINT nMsg, Callback callback, void* context);
nsresult AddMonitor(UINT nMsg, Callback callback, void* context);
nsresult RemoveMonitor(UINT nMsg, Callback callback, void* context);
private:
struct CallbackData {
Callback cb;
void* context;
CallbackData() : cb(nullptr), context(nullptr) {}
CallbackData(Callback cb, void* ctx) : cb(cb), context(ctx) {}
bool Invoke(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam,
LRESULT* aResult);
bool operator==(const CallbackData& rhs) const {
return cb == rhs.cb && context == rhs.context;
}
bool operator!=(const CallbackData& rhs) const { return !(*this == rhs); }
explicit operator bool() const { return !!cb; }
};
typedef nsTArray<CallbackData> CallbackDataArray;
struct MessageData {
UINT nMsg;
CallbackData hook;
CallbackDataArray monitors;
};
bool Notify(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam,
MSGResult& aResult);
MessageData* Lookup(UINT nMsg);
MessageData* LookupOrCreate(UINT nMsg);
void DeleteIfEmpty(MessageData* data);
typedef nsTArray<MessageData> MessageDataArray;
MessageDataArray mMessageData;
// For Notify
friend class ::nsWindow;
};
} // namespace widget
} // namespace mozilla
#endif // __mozilla_WindowHook_h__
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