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