source: vbox/trunk/src/VBox/Main/MouseImpl.cpp@ 26750

/* $Id: MouseImpl.cpp 26750 2010-02-24 14:46:25Z vboxsync $ */
/** @file
 * VirtualBox COM class implementation
 */

/*
 * Copyright (C) 2006-2008 Sun Microsystems, Inc.
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 USA or visit http://www.sun.com if you need
 * additional information or have any questions.
 */

#include "MouseImpl.h"
#include "DisplayImpl.h"
#include "VMMDev.h"

#include "AutoCaller.h"
#include "Logging.h"

#include <VBox/pdmdrv.h>
#include <iprt/asm.h>
#include <VBox/VMMDev.h>

/**
 * Mouse driver instance data.
 */
typedef struct DRVMAINMOUSE
{
    /** Pointer to the mouse object. */
    Mouse                      *pMouse;
    /** Pointer to the driver instance structure. */
    PPDMDRVINS                  pDrvIns;
    /** Pointer to the mouse port interface of the driver/device above us. */
    PPDMIMOUSEPORT              pUpPort;
    /** Our mouse connector interface. */
    PDMIMOUSECONNECTOR          IConnector;
} DRVMAINMOUSE, *PDRVMAINMOUSE;


// constructor / destructor
/////////////////////////////////////////////////////////////////////////////

DEFINE_EMPTY_CTOR_DTOR (Mouse)

HRESULT Mouse::FinalConstruct()
{
    mpDrv = NULL;
    mLastAbsX = 0x8000;
    mLastAbsY = 0x8000;
    mLastButtons = 0;
    return S_OK;
}

void Mouse::FinalRelease()
{
    uninit();
}

// public methods only for internal purposes
/////////////////////////////////////////////////////////////////////////////

/**
 * Initializes the mouse object.
 *
 * @returns COM result indicator
 * @param parent handle of our parent object
 */
HRESULT Mouse::init (Console *parent)
{
    LogFlowThisFunc(("\n"));

    ComAssertRet(parent, E_INVALIDARG);

    /* Enclose the state transition NotReady->InInit->Ready */
    AutoInitSpan autoInitSpan(this);
    AssertReturn(autoInitSpan.isOk(), E_FAIL);

    unconst(mParent) = parent;

#ifdef RT_OS_L4
    /* L4 console has no own mouse cursor */
    uHostCaps = VMMDEV_MOUSE_HOST_CANNOT_HWPOINTER;
#else
    uHostCaps = 0;
#endif
    uDevCaps = 0;

    /* Confirm a successful initialization */
    autoInitSpan.setSucceeded();

    return S_OK;
}

/**
 *  Uninitializes the instance and sets the ready flag to FALSE.
 *  Called either from FinalRelease() or by the parent when it gets destroyed.
 */
void Mouse::uninit()
{
    LogFlowThisFunc(("\n"));

    /* Enclose the state transition Ready->InUninit->NotReady */
    AutoUninitSpan autoUninitSpan(this);
    if (autoUninitSpan.uninitDone())
        return;

    if (mpDrv)
        mpDrv->pMouse = NULL;
    mpDrv = NULL;

    unconst(mParent).setNull();
}


// IMouse properties
/////////////////////////////////////////////////////////////////////////////

int Mouse::getVMMDevMouseCaps(uint32_t *pfCaps)
{
    AssertPtrReturn(pfCaps, E_POINTER);
    VMMDev *pVMMDev = mParent->getVMMDev();
    ComAssertRet(pVMMDev, E_FAIL);
    PPDMIVMMDEVPORT pVMMDevPort = pVMMDev->getVMMDevPort();
    ComAssertRet(pVMMDevPort, E_FAIL);

    int rc = pVMMDevPort->pfnQueryMouseCapabilities(pVMMDevPort, pfCaps);
    return RT_SUCCESS(rc) ? S_OK : E_FAIL;
}

int Mouse::setVMMDevMouseCaps(uint32_t fCaps)
{
    VMMDev *pVMMDev = mParent->getVMMDev();
    ComAssertRet(pVMMDev, E_FAIL);
    PPDMIVMMDEVPORT pVMMDevPort = pVMMDev->getVMMDevPort();
    ComAssertRet(pVMMDevPort, E_FAIL);

    int rc = pVMMDevPort->pfnSetMouseCapabilities(pVMMDevPort, fCaps);
    return RT_SUCCESS(rc) ? S_OK : E_FAIL;
}

/**
 * Returns whether the current setup can accept absolute mouse
 * events.
 *
 * @returns COM status code
 * @param absoluteSupported address of result variable
 */
STDMETHODIMP Mouse::COMGETTER(AbsoluteSupported) (BOOL *absoluteSupported)
{
    if (!absoluteSupported)
        return E_POINTER;

    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);

    CHECK_CONSOLE_DRV (mpDrv);

    if (uDevCaps & MOUSE_DEVCAP_ABSOLUTE)
        *absoluteSupported = TRUE;
    else
    {
        uint32_t mouseCaps;
        int rc = getVMMDevMouseCaps(&mouseCaps);
        AssertComRCReturn(rc, rc);
        *absoluteSupported = mouseCaps & VMMDEV_MOUSE_GUEST_CAN_ABSOLUTE;
    }

    return S_OK;
}

/**
 * Returns whether the guest can currently draw the mouse cursor itself.
 *
 * @returns COM status code
 * @param absoluteSupported address of result variable
 */
STDMETHODIMP Mouse::COMGETTER(NeedsHostCursor) (BOOL *pfNeedsHostCursor)
{
    if (!pfNeedsHostCursor)
        return E_POINTER;

    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);

    CHECK_CONSOLE_DRV (mpDrv);

    uint32_t fMouseCaps;
    int rc = getVMMDevMouseCaps(&fMouseCaps);
    AssertComRCReturn(rc, rc);
    *pfNeedsHostCursor = !!(  fMouseCaps
                            & VMMDEV_MOUSE_GUEST_NEEDS_HOST_CURSOR);
    return S_OK;
}

// IMouse methods
/////////////////////////////////////////////////////////////////////////////

static uint32_t mouseButtonsToPDM(LONG buttonState)
{
    uint32_t fButtons = 0;
    if (buttonState & MouseButtonState_LeftButton)
        fButtons |= PDMIMOUSEPORT_BUTTON_LEFT;
    if (buttonState & MouseButtonState_RightButton)
        fButtons |= PDMIMOUSEPORT_BUTTON_RIGHT;
    if (buttonState & MouseButtonState_MiddleButton)
        fButtons |= PDMIMOUSEPORT_BUTTON_MIDDLE;
    if (buttonState & MouseButtonState_XButton1)
        fButtons |= PDMIMOUSEPORT_BUTTON_X1;
    if (buttonState & MouseButtonState_XButton2)
        fButtons |= PDMIMOUSEPORT_BUTTON_X2;
    return fButtons;
}


/**
 * Send a relative event to the mouse device.
 *
 * @returns   COM status code
 */
int Mouse::reportRelEventToMouseDev(int32_t dx, int32_t dy, int32_t dz,
                                    int32_t dw, uint32_t fButtons)
{
    if (dx || dy || dz || dw || fButtons != mLastButtons)
    {
        PPDMIMOUSEPORT pUpPort = mpDrv->pUpPort;
        int vrc = pUpPort->pfnPutEvent(pUpPort, dx, dy, dz, dw, fButtons);

        if (RT_FAILURE(vrc))
            setError(VBOX_E_IPRT_ERROR,
                     tr("Could not send the mouse event to the virtual mouse (%Rrc)"),
                     vrc);
        AssertRCReturn(vrc, VBOX_E_IPRT_ERROR);
    }
    return S_OK;
}


/**
 * Send an absolute position event to the mouse device.
 *
 * @returns   COM status code
 */
int Mouse::reportAbsEventToMouseDev(uint32_t mouseXAbs, uint32_t mouseYAbs,
                                    int32_t dz, int32_t dw, uint32_t fButtons)
{
    if (   mouseXAbs != mLastAbsX
        || mouseYAbs != mLastAbsY
        || dz
        || dw
        || fButtons != mLastButtons)
    {
        int vrc = mpDrv->pUpPort->pfnPutEventAbs(mpDrv->pUpPort, mouseXAbs,
                                                 mouseYAbs, dz, dw, fButtons);
        if (RT_FAILURE(vrc))
            setError(VBOX_E_IPRT_ERROR,
                     tr("Could not send the mouse event to the virtual mouse (%Rrc)"),
                     vrc);
        AssertRCReturn(vrc, VBOX_E_IPRT_ERROR);
    }
    return S_OK;
}


/**
 * Send an absolute position event to the VMM device.
 *
 * @returns   COM status code
 */
int Mouse::reportAbsEventToVMMDev(uint32_t mouseXAbs, uint32_t mouseYAbs)
{
    VMMDev *pVMMDev = mParent->getVMMDev();
    ComAssertRet(pVMMDev, E_FAIL);
    PPDMIVMMDEVPORT pVMMDevPort = pVMMDev->getVMMDevPort();
    ComAssertRet(pVMMDevPort, E_FAIL);

    if (mouseXAbs != mLastAbsX || mouseYAbs != mLastAbsY)
    {
        int vrc = pVMMDevPort->pfnSetAbsoluteMouse(pVMMDevPort,
                                                   mouseXAbs, mouseYAbs);
        if (RT_FAILURE(vrc))
            setError(VBOX_E_IPRT_ERROR,
                     tr("Could not send the mouse event to the virtual mouse (%Rrc)"),
                     vrc);
        AssertRCReturn(vrc, VBOX_E_IPRT_ERROR);
    }
    return S_OK;
}

/**
 * Send a mouse event.
 *
 * @returns COM status code
 * @param dx          X movement
 * @param dy          Y movement
 * @param dz          Z movement
 * @param buttonState The mouse button state
 */
STDMETHODIMP Mouse::PutMouseEvent(LONG dx, LONG dy, LONG dz, LONG dw, LONG buttonState)
{
    HRESULT rc = S_OK;

    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);

    CHECK_CONSOLE_DRV (mpDrv);

    LogRel3(("%s: dx=%d, dy=%d, dz=%d, dw=%d\n", __PRETTY_FUNCTION__,
             dx, dy, dz, dw));
    if (!(uDevCaps & MOUSE_DEVCAP_ABSOLUTE))
    {
        /*
         * This method being called implies that the host no
         * longer wants to use absolute coordinates. If the VMM
         * device isn't aware of that yet, tell it.
         */
        uint32_t mouseCaps;
        rc = getVMMDevMouseCaps(&mouseCaps);
        ComAssertComRCRet(rc, rc);

        if (mouseCaps & VMMDEV_MOUSE_HOST_CAN_ABSOLUTE)
            setVMMDevMouseCaps(uHostCaps);
    }

    uint32_t fButtons = mouseButtonsToPDM(buttonState);
    rc = reportRelEventToMouseDev(dx, dy, dz, dw, fButtons);
    if (SUCCEEDED(rc))
        mLastButtons = fButtons;

    return rc;
}

/**
 * Convert an X value in screen co-ordinates to a value from 0 to 0xffff
 *
 * @returns   COM status value
 */
int Mouse::convertDisplayWidth(LONG x, uint32_t *pcX)
{
    AssertPtrReturn(pcX, E_POINTER);
    Display *pDisplay = mParent->getDisplay();
    ComAssertRet(pDisplay, E_FAIL);

    ULONG displayWidth;
    int rc = pDisplay->COMGETTER(Width)(&displayWidth);
    ComAssertComRCRet(rc, rc);

    *pcX = displayWidth ? (x * 0xFFFF) / displayWidth: 0;
    return S_OK;
}

/**
 * Convert a Y value in screen co-ordinates to a value from 0 to 0xffff
 *
 * @returns   COM status value
 */
int Mouse::convertDisplayHeight(LONG y, uint32_t *pcY)
{
    AssertPtrReturn(pcY, E_POINTER);
    Display *pDisplay = mParent->getDisplay();
    ComAssertRet(pDisplay, E_FAIL);

    ULONG displayHeight;
    int rc = pDisplay->COMGETTER(Height)(&displayHeight);
    ComAssertComRCRet(rc, rc);

    *pcY = displayHeight ? (y * 0xFFFF) / displayHeight: 0;
    return S_OK;
}


/**
 * Send an absolute mouse event to the VM. This only works
 * when the required guest support has been installed.
 *
 * @returns COM status code
 * @param x          X position (pixel)
 * @param y          Y position (pixel)
 * @param dz         Z movement
 * @param buttonState The mouse button state
 */
STDMETHODIMP Mouse::PutMouseEventAbsolute(LONG x, LONG y, LONG dz, LONG dw,
                                          LONG buttonState)
{
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);

    LogRel3(("%s: x=%d, y=%d, dz=%d, dw=%d, buttonState=0x%x\n",
             __PRETTY_FUNCTION__, x, y, dz, dw, buttonState));

    CHECK_CONSOLE_DRV(mpDrv);

    uint32_t mouseXAbs;
    HRESULT rc = convertDisplayWidth(x, &mouseXAbs);
    ComAssertComRCRet(rc, rc);
    if (mouseXAbs > 0xffff)
        mouseXAbs = mLastAbsX;

    uint32_t mouseYAbs;
    rc = convertDisplayHeight(y, &mouseYAbs);
    ComAssertComRCRet(rc, rc);
    if (mouseYAbs > 0xffff)
        mouseYAbs = mLastAbsY;

    uint32_t fButtons = mouseButtonsToPDM(buttonState);

    /* Older guest additions rely on a small phony movement event on the
     * PS/2 device to notice absolute events. */
    bool fNeedsJiggle = false;

    if (uDevCaps & MOUSE_DEVCAP_ABSOLUTE)
        rc = reportAbsEventToMouseDev(mouseXAbs, mouseYAbs, dz, dw, fButtons);
    else
    {
        uint32_t mouseCaps;
        rc = getVMMDevMouseCaps(&mouseCaps);
        ComAssertComRCRet(rc, rc);

        /*
         * This method being called implies that the host wants
         * to use absolute coordinates. If the VMM device isn't
         * aware of that yet, tell it.
         */
        if (!(mouseCaps & VMMDEV_MOUSE_HOST_CAN_ABSOLUTE))
            setVMMDevMouseCaps(uHostCaps | VMMDEV_MOUSE_HOST_CAN_ABSOLUTE);

        /*
         * Send the absolute mouse position to the VMM device.
         */
        rc = reportAbsEventToVMMDev(mouseXAbs, mouseYAbs);
        fNeedsJiggle = !(mouseCaps & VMMDEV_MOUSE_GUEST_USES_VMMDEV);
    }
    ComAssertComRCRet(rc, rc);

    mLastAbsX = mouseXAbs;
    mLastAbsY = mouseYAbs;

    if (!(uDevCaps & MOUSE_DEVCAP_ABSOLUTE))
    {
        /* We may need to send a relative event for button information or to
         * wake the guest up to the changed absolute co-ordinates.
         * If the event is a pure wake up one, we make sure it contains some
         * (possibly phony) event data to make sure it isn't just discarded on
         * the way. */
        if (fNeedsJiggle || fButtons != mLastButtons || dz || dw)
        {
            rc = reportRelEventToMouseDev(fNeedsJiggle ? 1 : 0, 0, dz, dw,
                                          fButtons);
            ComAssertComRCRet(rc, rc);
        }
    }
    mLastButtons = fButtons;
    return rc;
}

// private methods
/////////////////////////////////////////////////////////////////////////////


/**
 * @interface_method_impl{PDMIMOUSECONNECTOR,pfnAbsModeChange}
 */
DECLCALLBACK(void) Mouse::mouseAbsModeChange(PPDMIMOUSECONNECTOR pInterface, bool fEnabled)
{
    PDRVMAINMOUSE pDrv = RT_FROM_MEMBER(pInterface, DRVMAINMOUSE, IConnector);
    if (fEnabled)
        pDrv->pMouse->uDevCaps |= MOUSE_DEVCAP_ABSOLUTE;
    else
        pDrv->pMouse->uDevCaps &= ~MOUSE_DEVCAP_ABSOLUTE;

    /** @todo we have to hack around the fact that VMMDev may not be
     * initialised too close to startup.  The real fix is to change the
     * protocol for onMouseCapabilityChange so that we no longer need to
     * query VMMDev, but that requires more changes that I want to do in
     * the next commit, so it must be put off until the followup one. */
    uint32_t fMouseCaps = 0;
    int rc = S_OK;
    if (   pDrv->pMouse->mParent->getVMMDev()
        && pDrv->pMouse->mParent->getVMMDev()->mpDrv)
        rc = pDrv->pMouse->getVMMDevMouseCaps(&fMouseCaps);
    AssertComRCReturnVoid(rc);
    pDrv->pMouse->getParent()->onMouseCapabilityChange(fEnabled, fMouseCaps & VMMDEV_MOUSE_GUEST_NEEDS_HOST_CURSOR);
}


/**
 * @interface_method_impl{PDMIBASE,pfnQueryInterface}
 */
DECLCALLBACK(void *)  Mouse::drvQueryInterface(PPDMIBASE pInterface, const char *pszIID)
{
    PPDMDRVINS      pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
    PDRVMAINMOUSE   pDrv    = PDMINS_2_DATA(pDrvIns, PDRVMAINMOUSE);

    PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
    PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMOUSECONNECTOR, &pDrv->IConnector);
    return NULL;
}


/**
 * Destruct a mouse driver instance.
 *
 * @returns VBox status.
 * @param   pDrvIns     The driver instance data.
 */
DECLCALLBACK(void) Mouse::drvDestruct(PPDMDRVINS pDrvIns)
{
    PDRVMAINMOUSE pData = PDMINS_2_DATA(pDrvIns, PDRVMAINMOUSE);
    LogFlow(("Mouse::drvDestruct: iInstance=%d\n", pDrvIns->iInstance));
    PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);

    if (pData->pMouse)
    {
        AutoWriteLock mouseLock(pData->pMouse COMMA_LOCKVAL_SRC_POS);
        pData->pMouse->mpDrv = NULL;
    }
}


/**
 * Construct a mouse driver instance.
 *
 * @copydoc FNPDMDRVCONSTRUCT
 */
DECLCALLBACK(int) Mouse::drvConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
{
    PDRVMAINMOUSE pData = PDMINS_2_DATA(pDrvIns, PDRVMAINMOUSE);
    LogFlow(("drvMainMouse_Construct: iInstance=%d\n", pDrvIns->iInstance));
    PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);

    /*
     * Validate configuration.
     */
    if (!CFGMR3AreValuesValid(pCfg, "Object\0"))
        return VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES;
    AssertMsgReturn(PDMDrvHlpNoAttach(pDrvIns) == VERR_PDM_NO_ATTACHED_DRIVER,
                    ("Configuration error: Not possible to attach anything to this driver!\n"),
                    VERR_PDM_DRVINS_NO_ATTACH);

    /*
     * IBase.
     */
    pDrvIns->IBase.pfnQueryInterface        = Mouse::drvQueryInterface;

    pData->IConnector.pfnAbsModeChange      = Mouse::mouseAbsModeChange;

    /*
     * Get the IMousePort interface of the above driver/device.
     */
    pData->pUpPort = (PPDMIMOUSEPORT)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase, PDMIMOUSEPORT_IID);
    if (!pData->pUpPort)
    {
        AssertMsgFailed(("Configuration error: No mouse port interface above!\n"));
        return VERR_PDM_MISSING_INTERFACE_ABOVE;
    }

    /*
     * Get the Mouse object pointer and update the mpDrv member.
     */
    void *pv;
    int rc = CFGMR3QueryPtr(pCfg, "Object", &pv);
    if (RT_FAILURE(rc))
    {
        AssertMsgFailed(("Configuration error: No/bad \"Object\" value! rc=%Rrc\n", rc));
        return rc;
    }
    pData->pMouse = (Mouse *)pv;        /** @todo Check this cast! */
    pData->pMouse->mpDrv = pData;

    return VINF_SUCCESS;
}


/**
 * Main mouse driver registration record.
 */
const PDMDRVREG Mouse::DrvReg =
{
    /* u32Version */
    PDM_DRVREG_VERSION,
    /* szName */
    "MainMouse",
    /* szRCMod */
    "",
    /* szR0Mod */
    "",
    /* pszDescription */
    "Main mouse driver (Main as in the API).",
    /* fFlags */
    PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
    /* fClass. */
    PDM_DRVREG_CLASS_MOUSE,
    /* cMaxInstances */
    ~0,
    /* cbInstance */
    sizeof(DRVMAINMOUSE),
    /* pfnConstruct */
    Mouse::drvConstruct,
    /* pfnDestruct */
    Mouse::drvDestruct,
    /* pfnRelocate */
    NULL,
    /* pfnIOCtl */
    NULL,
    /* pfnPowerOn */
    NULL,
    /* pfnReset */
    NULL,
    /* pfnSuspend */
    NULL,
    /* pfnResume */
    NULL,
    /* pfnAttach */
    NULL,
    /* pfnDetach */
    NULL,
    /* pfnPowerOff */
    NULL,
    /* pfnSoftReset */
    NULL,
    /* u32EndVersion */
    PDM_DRVREG_VERSION
};
/* vi: set tabstop=4 shiftwidth=4 expandtab: */