549 lines
13 KiB
C
549 lines
13 KiB
C
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//
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// IM.C
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// Input Manager
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//
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// Copyright(c) 1997-
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//
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#include <as16.h>
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//
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// IM_DDInit()
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// This creates the resources we need for controlling
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//
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BOOL IM_DDInit(void)
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{
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UINT uSel;
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BOOL rc = FALSE;
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DebugEntry(IM_DDInit);
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//
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// Create interrupt patches for mouse_event and keybd_event
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//
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uSel = CreateFnPatch(mouse_event, ASMMouseEvent, &g_imPatches[IM_MOUSEEVENT], 0);
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if (!uSel)
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{
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ERROR_OUT(("Couldn't find mouse_event"));
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DC_QUIT;
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}
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g_imPatches[IM_MOUSEEVENT].fInterruptable = TRUE;
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if (!CreateFnPatch(keybd_event, ASMKeyboardEvent, &g_imPatches[IM_KEYBOARDEVENT], uSel))
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{
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ERROR_OUT(("Couldn't find keybd_event"));
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DC_QUIT;
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}
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g_imPatches[IM_KEYBOARDEVENT].fInterruptable = TRUE;
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//
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// Create patch for SignalProc32 so we can find out when fault/hung
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// dialogs from KERNEL32 come up.
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//
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if (!CreateFnPatch(SignalProc32, DrvSignalProc32, &g_imPatches[IM_SIGNALPROC32], 0))
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{
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ERROR_OUT(("Couldn't patch SignalProc32"));
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DC_QUIT;
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}
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//
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// Create patches for win16lock pulsing in 16-bit app modal loops
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//
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uSel = CreateFnPatch(RealGetCursorPos, DrvGetCursorPos, &g_imPatches[IM_GETCURSORPOS], 0);
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if (!uSel)
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{
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ERROR_OUT(("Couldn't find GetCursorPos"));
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DC_QUIT;
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}
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if (!CreateFnPatch(GetAsyncKeyState, DrvGetAsyncKeyState, &g_imPatches[IM_GETASYNCKEYSTATE], 0))
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{
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ERROR_OUT(("Couldn't find GetAsyncKeyState"));
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DC_QUIT;
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}
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rc = TRUE;
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DC_EXIT_POINT:
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DebugExitBOOL(IM_DDInit, rc);
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return(rc);
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}
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//
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// IM_DDTerm()
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// This cleans up any resources we needed for controlling
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//
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void IM_DDTerm(void)
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{
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IM_PATCH imPatch;
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DebugEntry(IM_DDTerm);
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//
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// Force undo of hooks
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//
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OSIInstallControlledHooks16(FALSE);
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//
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// Destroy patches
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//
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for (imPatch = IM_FIRST; imPatch < IM_MAX; imPatch++)
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{
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DestroyFnPatch(&g_imPatches[imPatch]);
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}
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DebugExitVOID(IM_DDTerm);
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}
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//
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// OSIInstallControlledHooks16()
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//
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// This installs/removes the input hooks we need to allow this machine to
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// be controlled.
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//
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BOOL WINAPI OSIInstallControlledHooks16(BOOL fEnable)
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{
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BOOL rc = TRUE;
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IM_PATCH imPatch;
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DebugEntry(OSIInstallControlledHooks16);
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if (fEnable)
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{
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if (!g_imWin95Data.imLowLevelHooks)
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{
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g_imWin95Data.imLowLevelHooks = TRUE;
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g_imMouseDowns = 0;
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//
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// GlobalSmartPageLock() stuff we need:
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// * Our code segment
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// * Our data segment
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//
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GlobalSmartPageLock((HGLOBAL)SELECTOROF((LPVOID)DrvMouseEvent));
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GlobalSmartPageLock((HGLOBAL)SELECTOROF((LPVOID)&g_imSharedData));
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//
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// Install hooks
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//
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for (imPatch = IM_FIRST; imPatch < IM_MAX; imPatch++)
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{
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EnableFnPatch(&g_imPatches[imPatch], PATCH_ACTIVATE);
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}
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}
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}
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else
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{
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if (g_imWin95Data.imLowLevelHooks)
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{
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//
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// Uninstall hooks
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//
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for (imPatch = IM_MAX; imPatch > 0; imPatch--)
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{
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EnableFnPatch(&g_imPatches[imPatch-1], PATCH_DEACTIVATE);
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}
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//
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// GlobalSmartUnPageLock() stuff we needed
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//
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GlobalSmartPageUnlock((HGLOBAL)SELECTOROF((LPVOID)&g_imSharedData));
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GlobalSmartPageUnlock((HGLOBAL)SELECTOROF((LPVOID)DrvMouseEvent));
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g_imWin95Data.imLowLevelHooks = FALSE;
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}
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}
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DebugExitBOOL(OSIInstallControlledHooks16, rc);
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return(rc);
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}
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#pragma optimize("gle", off)
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void IMInject(BOOL fOn)
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{
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if (fOn)
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{
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#ifdef DEBUG
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DWORD tmp;
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//
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// Disable interrupts then turn injection global on
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// But before we do this, we must make sure that we aren't going
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// to have to fault in a new stack page. Since this is on a 32-bit
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// thread, we will be in trouble.
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//
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tmp = GetSelectorBase(SELECTOROF(((LPVOID)&fOn))) +
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OFFSETOF((LPVOID)&fOn);
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if ((tmp & 0xFFFFF000) != ((tmp - 0x100) & 0xFFFFF000))
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{
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ERROR_OUT(("Close to page boundary on 32-bit stack %08lx", tmp));
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}
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#endif // DEBUG
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_asm cli
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g_imWin95Data.imInjecting = TRUE;
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}
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else
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{
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//
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// Turn injection global off then enable interrupts
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//
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g_imWin95Data.imInjecting = FALSE;
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_asm sti
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}
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}
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#pragma optimize("", on)
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//
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// OSIInjectMouseEvent16()
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//
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void WINAPI OSIInjectMouseEvent16
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(
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UINT flags,
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int x,
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int y,
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UINT mouseData,
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DWORD dwExtraInfo
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)
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{
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DebugEntry(OSIInjectMouseEvent16);
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if (flags & IM_MOUSEEVENTF_BUTTONDOWN_FLAGS)
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{
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++g_imMouseDowns;
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}
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//
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// We disable interrupts, call the real mouse_event, reenable
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// interrupts. That way our mouse_event patch is serialized.
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// And we can check imInjecting.
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//
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IMInject(TRUE);
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CallMouseEvent(flags, x, y, mouseData, LOWORD(dwExtraInfo), HIWORD(dwExtraInfo));
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IMInject(FALSE);
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if (flags & IM_MOUSEEVENTF_BUTTONUP_FLAGS)
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{
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--g_imMouseDowns;
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ASSERT(g_imMouseDowns >= 0);
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}
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DebugExitVOID(OSIInjectMouseEvent16);
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}
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//
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// OSIInjectKeyboardEvent16()
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//
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void WINAPI OSIInjectKeyboardEvent16
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(
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UINT flags,
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WORD vkCode,
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WORD scanCode,
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DWORD dwExtraInfo
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)
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{
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DebugEntry(OSIInjectKeyboardEvent16);
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//
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// First, fix up the flags
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//
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if (flags & KEYEVENTF_KEYUP)
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{
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// Put 0x80 in the HIBYTE of vkCode, this means a keyup
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vkCode = (WORD)(BYTE)vkCode | USERKEYEVENTF_KEYUP;
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}
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if (flags & KEYEVENTF_EXTENDEDKEY)
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{
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// Put 0x01 in the HIBYTE of scanCode, this means extended
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scanCode = (WORD)(BYTE)scanCode | USERKEYEVENTF_EXTENDEDKEY;
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}
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//
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// We disable interrupts, call the real keybd_event, reenable
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// interrupts. That way our keybd_event patch is serialized.
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// And we can check the imfInject variable.
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//
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IMInject(TRUE);
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CallKeyboardEvent(vkCode, scanCode, LOWORD(dwExtraInfo), HIWORD(dwExtraInfo));
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IMInject(FALSE);
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DebugExitVOID(OSIInjectKeyboardEvent16);
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}
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//
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// Win16lock pulse points when injecting mouse down/up sequences into 16-bit
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// modal loop apps.
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//
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//
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// IMCheckWin16LockPulse()
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// This pulses the win16lock if we are in the middle of injecting a mouse
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// down-up sequence to a 16-bit app shared on this machine. We do this to
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// prevent deadlock, caused by 16-bit dudes going into modal loops, not
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// releasing the win16lock. Our 32-bit thread would get stuck on the win16
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// lock trying to play back the rest of the sequence.
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//
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void IMCheckWin16LockPulse(void)
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{
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DebugEntry(IMCheckWin16LockPulse);
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if ((g_imMouseDowns > 0) &&
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(GetProcessDword(0, GPD_FLAGS) & GPF_WIN16_PROCESS))
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{
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TRACE_OUT(("Pulsing win16lock for 16-bit app; mouse down count %d", g_imMouseDowns));
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_LeaveWin16Lock();
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_EnterWin16Lock();
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TRACE_OUT(("Pulsed win16lock for 16-bit app; mouse down count %d", g_imMouseDowns));
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}
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DebugExitVOID(IMCheckWin16LockPulse);
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}
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int WINAPI DrvGetAsyncKeyState(int vk)
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{
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int retVal;
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DebugEntry(DrvGetAsyncKeyState);
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// Pulse BEFORE we call to USER
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IMCheckWin16LockPulse();
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EnableFnPatch(&g_imPatches[IM_GETASYNCKEYSTATE], PATCH_DISABLE);
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retVal = GetAsyncKeyState(vk);
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EnableFnPatch(&g_imPatches[IM_GETASYNCKEYSTATE], PATCH_ENABLE);
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DebugExitBOOL(DrvGetAsyncKeyState, retVal);
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return(retVal);
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}
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//
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// DrvGetCursorPos()
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//
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BOOL WINAPI DrvGetCursorPos(LPPOINT lppt)
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{
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BOOL retVal;
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DebugEntry(DrvGetCursorPos);
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// Pulse BEFORE calling USER
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IMCheckWin16LockPulse();
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EnableFnPatch(&g_imPatches[IM_GETCURSORPOS], PATCH_DISABLE);
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retVal = RealGetCursorPos(lppt);
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EnableFnPatch(&g_imPatches[IM_GETCURSORPOS], PATCH_ENABLE);
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DebugExitBOOL(DrvGetCursorPos, retVal);
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return(retVal);
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}
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//
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// DrvMouseEvent()
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// mouse_event interrupt patch
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//
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void WINAPI DrvMouseEvent
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(
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UINT regAX,
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UINT regBX,
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UINT regCX,
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UINT regDX,
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UINT regSI,
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UINT regDI
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)
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{
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BOOL fAllow;
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//
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// If this is injected by us, just pass it through.
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//
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fAllow = TRUE;
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if (g_imWin95Data.imInjecting)
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{
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DC_QUIT;
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}
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//
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// NOTE:
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// flags is in AX
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// x coord is in BX
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// y coord is in CX
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// mousedata is in DX
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// dwExtraInfo is in DI, SI
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//
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if (g_imSharedData.imControlled && !g_imSharedData.imPaused)
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{
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//
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// If this is a button click, take control back
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//
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if (regAX &
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(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_RIGHTDOWN | MOUSEEVENTF_MIDDLEDOWN))
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{
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if (!g_imSharedData.imUnattended)
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{
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PostMessage(g_asMainWindow, DCS_REVOKECONTROL_MSG, FALSE, 0);
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}
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}
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if (!g_imSharedData.imSuspended)
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fAllow = FALSE;
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}
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DC_EXIT_POINT:
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if (fAllow)
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{
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EnableFnPatch(&g_imPatches[IM_MOUSEEVENT], PATCH_DISABLE);
|
||
|
|
CallMouseEvent(regAX, regBX, regCX, regDX, regSI, regDI);
|
||
|
|
EnableFnPatch(&g_imPatches[IM_MOUSEEVENT], PATCH_ENABLE);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// DrvKeyboardEvent()
|
||
|
|
// keybd_event interrupt patch
|
||
|
|
//
|
||
|
|
void WINAPI DrvKeyboardEvent
|
||
|
|
(
|
||
|
|
UINT regAX,
|
||
|
|
UINT regBX,
|
||
|
|
UINT regSI,
|
||
|
|
UINT regDI
|
||
|
|
)
|
||
|
|
{
|
||
|
|
BOOL fAllow;
|
||
|
|
|
||
|
|
//
|
||
|
|
// If this is injected by us, pass it through. Do the same for
|
||
|
|
// critical errors, since everything is frozen and we can't play back
|
||
|
|
// input if we wanted to.
|
||
|
|
//
|
||
|
|
// If the scan-code (in regBX) is 0 we assume that the input
|
||
|
|
// is injected by an application (such as an IME) and we don't
|
||
|
|
// want to block this or take control.
|
||
|
|
//
|
||
|
|
|
||
|
|
fAllow = TRUE;
|
||
|
|
if (g_imWin95Data.imInjecting || !regBX)
|
||
|
|
{
|
||
|
|
DC_QUIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// NOTE:
|
||
|
|
// vkCode is in AX, LOBYTE is vkCode, HIBYTE is state
|
||
|
|
// scanCode is in BX
|
||
|
|
// dwExtraInfo is in DI, SI
|
||
|
|
//
|
||
|
|
|
||
|
|
if (g_imSharedData.imControlled && !g_imSharedData.imPaused)
|
||
|
|
{
|
||
|
|
if (!(regAX & USERKEYEVENTF_KEYUP))
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// This is a key down. Take control back (except for ALT key),
|
||
|
|
// and kill control allowability if it's the ESC key.
|
||
|
|
//
|
||
|
|
|
||
|
|
if (LOBYTE(regAX) == VK_ESCAPE)
|
||
|
|
{
|
||
|
|
PostMessage(g_asMainWindow, DCS_ALLOWCONTROL_MSG, FALSE, 0);
|
||
|
|
}
|
||
|
|
else if (LOBYTE(regAX != VK_MENU))
|
||
|
|
{
|
||
|
|
if (!g_imSharedData.imUnattended)
|
||
|
|
{
|
||
|
|
PostMessage(g_asMainWindow, DCS_REVOKECONTROL_MSG, 0, 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Don't discard toggle keys. The enabled/disabled function
|
||
|
|
// is already set before we see the keystroke. If we discard,
|
||
|
|
// the lights are incorrect.
|
||
|
|
//
|
||
|
|
if (!IM_KEY_IS_TOGGLE(LOBYTE(regAX)) && !g_imSharedData.imSuspended)
|
||
|
|
{
|
||
|
|
fAllow = FALSE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
DC_EXIT_POINT:
|
||
|
|
if (fAllow)
|
||
|
|
{
|
||
|
|
EnableFnPatch(&g_imPatches[IM_KEYBOARDEVENT], PATCH_DISABLE);
|
||
|
|
CallKeyboardEvent(regAX, regBX, regSI, regDI);
|
||
|
|
EnableFnPatch(&g_imPatches[IM_KEYBOARDEVENT], PATCH_ENABLE);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// DrvSignalProc32()
|
||
|
|
// This patches USER's SignalProc32 export and watches for the FORCE_LOCK
|
||
|
|
// signals. KERNEL32 calls them before/after putting up critical error and
|
||
|
|
// fault dialogs. That's how we know when one is coming up, and can
|
||
|
|
// temporarily suspend remote control of your machine so you can dismiss
|
||
|
|
// them. Usually the thread they are on is boosted so high priority that
|
||
|
|
// nothing else can run, and so NM can't pump in input from the remote.
|
||
|
|
//
|
||
|
|
BOOL WINAPI DrvSignalProc32
|
||
|
|
(
|
||
|
|
DWORD dwSignal,
|
||
|
|
DWORD dwID,
|
||
|
|
DWORD dwFlags,
|
||
|
|
WORD hTask16
|
||
|
|
)
|
||
|
|
{
|
||
|
|
BOOL fRet;
|
||
|
|
|
||
|
|
DebugEntry(DrvSignalProc32);
|
||
|
|
|
||
|
|
if (dwSignal == SIG_PRE_FORCE_LOCK)
|
||
|
|
{
|
||
|
|
TRACE_OUT(("Disabling remote control before critical dialog, count %ld",
|
||
|
|
g_imSharedData.imSuspended));
|
||
|
|
++g_imSharedData.imSuspended;
|
||
|
|
}
|
||
|
|
|
||
|
|
EnableFnPatch(&g_imPatches[IM_SIGNALPROC32], PATCH_DISABLE);
|
||
|
|
fRet = SignalProc32(dwSignal, dwID, dwFlags, hTask16);
|
||
|
|
EnableFnPatch(&g_imPatches[IM_SIGNALPROC32], PATCH_ENABLE);
|
||
|
|
|
||
|
|
if (dwSignal == SIG_POST_FORCE_LOCK)
|
||
|
|
{
|
||
|
|
--g_imSharedData.imSuspended;
|
||
|
|
TRACE_OUT(("Enabling remote control after critical dialog, count %ld",
|
||
|
|
g_imSharedData.imSuspended));
|
||
|
|
}
|
||
|
|
|
||
|
|
DebugExitBOOL(DrvSignalProc32, fRet);
|
||
|
|
return(fRet);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|