1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/windows/WindowHook.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,81 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + *
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef __mozilla_WindowHook_h__
1.11 +#define __mozilla_WindowHook_h__
1.12 +
1.13 +#include <windows.h>
1.14 +
1.15 +#include <nsHashKeys.h>
1.16 +#include <nsClassHashtable.h>
1.17 +#include <nsTArray.h>
1.18 +
1.19 +#include "nsAppShell.h"
1.20 +
1.21 +class nsWindow;
1.22 +
1.23 +namespace mozilla {
1.24 +namespace widget {
1.25 +
1.26 +struct MSGResult;
1.27 +
1.28 +class WindowHook {
1.29 +public:
1.30 +
1.31 + // It is expected that most callbacks will return false
1.32 + typedef bool (*Callback)(void *aContext, HWND hWnd, UINT nMsg,
1.33 + WPARAM wParam, LPARAM lParam, LRESULT *aResult);
1.34 +
1.35 + nsresult AddHook(UINT nMsg, Callback callback, void *context);
1.36 + nsresult RemoveHook(UINT nMsg, Callback callback, void *context);
1.37 + nsresult AddMonitor(UINT nMsg, Callback callback, void *context);
1.38 + nsresult RemoveMonitor(UINT nMsg, Callback callback, void *context);
1.39 +
1.40 +private:
1.41 + struct CallbackData {
1.42 + Callback cb;
1.43 + void *context;
1.44 +
1.45 + CallbackData() : cb(nullptr), context(nullptr) {}
1.46 + CallbackData(Callback cb, void *ctx) : cb(cb), context(ctx) {}
1.47 + bool Invoke(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam,
1.48 + LRESULT *aResult);
1.49 + bool operator== (const CallbackData &rhs) const {
1.50 + return cb == rhs.cb && context == rhs.context;
1.51 + }
1.52 + bool operator!= (const CallbackData &rhs) const {
1.53 + return !(*this == rhs);
1.54 + }
1.55 + operator bool () const {
1.56 + return !!cb;
1.57 + }
1.58 + };
1.59 +
1.60 + typedef nsTArray<CallbackData> CallbackDataArray;
1.61 + struct MessageData {
1.62 + UINT nMsg;
1.63 + CallbackData hook;
1.64 + CallbackDataArray monitors;
1.65 + };
1.66 +
1.67 + bool Notify(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam,
1.68 + MSGResult& aResult);
1.69 +
1.70 + MessageData *Lookup(UINT nMsg);
1.71 + MessageData *LookupOrCreate(UINT nMsg);
1.72 + void DeleteIfEmpty(MessageData *data);
1.73 +
1.74 + typedef nsTArray<MessageData> MessageDataArray;
1.75 + MessageDataArray mMessageData;
1.76 +
1.77 + // For Notify
1.78 + friend class ::nsWindow;
1.79 +};
1.80 +
1.81 +}
1.82 +}
1.83 +
1.84 +#endif // __mozilla_WindowHook_h__
