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comparison: widget/windows/WindowHook.h
widget/windows/WindowHook.h
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #ifndef __mozilla_WindowHook_h__ | |
| 8 #define __mozilla_WindowHook_h__ | |
| 9 | |
| 10 #include <windows.h> | |
| 11 | |
| 12 #include <nsHashKeys.h> | |
| 13 #include <nsClassHashtable.h> | |
| 14 #include <nsTArray.h> | |
| 15 | |
| 16 #include "nsAppShell.h" | |
| 17 | |
| 18 class nsWindow; | |
| 19 | |
| 20 namespace mozilla { | |
| 21 namespace widget { | |
| 22 | |
| 23 struct MSGResult; | |
| 24 | |
| 25 class WindowHook { | |
| 26 public: | |
| 27 | |
| 28 // It is expected that most callbacks will return false | |
| 29 typedef bool (*Callback)(void *aContext, HWND hWnd, UINT nMsg, | |
| 30 WPARAM wParam, LPARAM lParam, LRESULT *aResult); | |
| 31 | |
| 32 nsresult AddHook(UINT nMsg, Callback callback, void *context); | |
| 33 nsresult RemoveHook(UINT nMsg, Callback callback, void *context); | |
| 34 nsresult AddMonitor(UINT nMsg, Callback callback, void *context); | |
| 35 nsresult RemoveMonitor(UINT nMsg, Callback callback, void *context); | |
| 36 | |
| 37 private: | |
| 38 struct CallbackData { | |
| 39 Callback cb; | |
| 40 void *context; | |
| 41 | |
| 42 CallbackData() : cb(nullptr), context(nullptr) {} | |
| 43 CallbackData(Callback cb, void *ctx) : cb(cb), context(ctx) {} | |
| 44 bool Invoke(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam, | |
| 45 LRESULT *aResult); | |
| 46 bool operator== (const CallbackData &rhs) const { | |
| 47 return cb == rhs.cb && context == rhs.context; | |
| 48 } | |
| 49 bool operator!= (const CallbackData &rhs) const { | |
| 50 return !(*this == rhs); | |
| 51 } | |
| 52 operator bool () const { | |
| 53 return !!cb; | |
| 54 } | |
| 55 }; | |
| 56 | |
| 57 typedef nsTArray<CallbackData> CallbackDataArray; | |
| 58 struct MessageData { | |
| 59 UINT nMsg; | |
| 60 CallbackData hook; | |
| 61 CallbackDataArray monitors; | |
| 62 }; | |
| 63 | |
| 64 bool Notify(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam, | |
| 65 MSGResult& aResult); | |
| 66 | |
| 67 MessageData *Lookup(UINT nMsg); | |
| 68 MessageData *LookupOrCreate(UINT nMsg); | |
| 69 void DeleteIfEmpty(MessageData *data); | |
| 70 | |
| 71 typedef nsTArray<MessageData> MessageDataArray; | |
| 72 MessageDataArray mMessageData; | |
| 73 | |
| 74 // For Notify | |
| 75 friend class ::nsWindow; | |
| 76 }; | |
| 77 | |
| 78 } | |
| 79 } | |
| 80 | |
| 81 #endif // __mozilla_WindowHook_h__ |
