michael@0: /* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 8 -*- */
michael@0: /* vim: set sw=4 ts=8 et tw=80 ft=cpp : */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef mozilla_dom_plugins_NPEventWindows_h
michael@0: #define mozilla_dom_plugins_NPEventWindows_h 1
michael@0: 
michael@0: 
michael@0: #include "npapi.h"
michael@0: namespace mozilla {
michael@0: 
michael@0: namespace plugins {
michael@0: 
michael@0: // We use an NPRemoteEvent struct so that we can store the extra data on
michael@0: // the stack so that we don't need to worry about managing the memory.
michael@0: struct NPRemoteEvent
michael@0: {
michael@0:     NPEvent event;
michael@0:     union {
michael@0:         RECT rect;
michael@0:         WINDOWPOS windowpos;
michael@0:     } lParamData;
michael@0: };
michael@0: 
michael@0: }
michael@0: 
michael@0: }
michael@0: 
michael@0: namespace IPC {
michael@0: 
michael@0: template <>
michael@0: struct ParamTraits<mozilla::plugins::NPRemoteEvent>
michael@0: {
michael@0:     typedef mozilla::plugins::NPRemoteEvent paramType;
michael@0: 
michael@0:     static void Write(Message* aMsg, const paramType& aParam)
michael@0:     {
michael@0:         // Make a non-const copy of aParam so that we can muck with
michael@0:         // its insides for tranport
michael@0:         paramType paramCopy;
michael@0: 
michael@0:         paramCopy.event = aParam.event;
michael@0: 
michael@0:         // We can't blindly ipc events because they may sometimes contain
michael@0:         // pointers to memory in the sending process. For example, the
michael@0:         // WM_IME_CONTROL with the IMC_GETCOMPOSITIONFONT message has lParam
michael@0:         // set to a pointer to a LOGFONT structure.
michael@0:         switch (paramCopy.event.event) {
michael@0:             case WM_WINDOWPOSCHANGED:
michael@0:                 // The lParam parameter of WM_WINDOWPOSCHANGED holds a pointer to
michael@0:                 // a WINDOWPOS structure that contains information about the
michael@0:                 // window's new size and position
michael@0:                 paramCopy.lParamData.windowpos = *(reinterpret_cast<WINDOWPOS*>(paramCopy.event.lParam));
michael@0:                 break;
michael@0:             case WM_PAINT:
michael@0:                 // The lParam parameter of WM_PAINT holds a pointer to an RECT
michael@0:                 // structure specifying the bounding box of the update area.
michael@0:                 paramCopy.lParamData.rect = *(reinterpret_cast<RECT*>(paramCopy.event.lParam));
michael@0:                 break;
michael@0: 
michael@0:             // the white list of events that we will ipc to the client
michael@0:             case WM_CHAR:
michael@0:             case WM_SYSCHAR:
michael@0: 
michael@0:             case WM_KEYUP:
michael@0:             case WM_SYSKEYUP:
michael@0: 
michael@0:             case WM_KEYDOWN:
michael@0:             case WM_SYSKEYDOWN:
michael@0: 
michael@0:             case WM_DEADCHAR:
michael@0:             case WM_SYSDEADCHAR:
michael@0:             case WM_CONTEXTMENU:
michael@0: 
michael@0:             case WM_CUT:
michael@0:             case WM_COPY:
michael@0:             case WM_PASTE:
michael@0:             case WM_CLEAR:
michael@0:             case WM_UNDO:
michael@0: 
michael@0:             case WM_MOUSELEAVE:
michael@0:             case WM_MOUSEMOVE:
michael@0:             case WM_LBUTTONDOWN:
michael@0:             case WM_MBUTTONDOWN:
michael@0:             case WM_RBUTTONDOWN:
michael@0:             case WM_LBUTTONUP:
michael@0:             case WM_MBUTTONUP:
michael@0:             case WM_RBUTTONUP:
michael@0:             case WM_LBUTTONDBLCLK:
michael@0:             case WM_MBUTTONDBLCLK:
michael@0:             case WM_RBUTTONDBLCLK:
michael@0: 
michael@0:             case WM_SETFOCUS:
michael@0:             case WM_KILLFOCUS:
michael@0:                 break;
michael@0: 
michael@0:             default:
michael@0:                 // RegisterWindowMessage events should be passed.
michael@0:                 if (paramCopy.event.event >= 0xC000)
michael@0:                     break;
michael@0: 
michael@0:                 // FIXME/bug 567465: temporarily work around unhandled
michael@0:                 // events by forwarding a "dummy event".  The eventual
michael@0:                 // fix will be to stop trying to send these events
michael@0:                 // entirely.
michael@0:                 paramCopy.event.event = WM_NULL;
michael@0:                 break;
michael@0:         }
michael@0: 
michael@0:         aMsg->WriteBytes(&paramCopy, sizeof(paramType));
michael@0:     }
michael@0: 
michael@0:     static bool Read(const Message* aMsg, void** aIter, paramType* aResult)
michael@0:     {
michael@0:         const char* bytes = 0;
michael@0: 
michael@0:         if (!aMsg->ReadBytes(aIter, &bytes, sizeof(paramType))) {
michael@0:             return false;
michael@0:         }
michael@0:         memcpy(aResult, bytes, sizeof(paramType));
michael@0: 
michael@0:         if (aResult->event.event == WM_PAINT) {
michael@0:             // restore the lParam to point at the RECT
michael@0:             aResult->event.lParam = reinterpret_cast<LPARAM>(&aResult->lParamData.rect);
michael@0:         } else if (aResult->event.event == WM_WINDOWPOSCHANGED) {
michael@0:             // restore the lParam to point at the WINDOWPOS
michael@0:             aResult->event.lParam = reinterpret_cast<LPARAM>(&aResult->lParamData.windowpos);
michael@0:         }
michael@0: 
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     static void Log(const paramType& aParam, std::wstring* aLog)
michael@0:     {
michael@0:         aLog->append(L"(WINEvent)");
michael@0:     }
michael@0: 
michael@0: };
michael@0: 
michael@0: } // namespace IPC
michael@0: 
michael@0: #endif // ifndef mozilla_dom_plugins_NPEventWindows_h