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/*
* Copyright © 2006 Nokia Corporation
* Copyright © 2006 Daniel Stone
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and that
* both that this copyright notice and this permission notice appear in
* supporting electronic documentation.
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR AUTHORS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Author: Daniel Stone <daniel@fooishbar.org>
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <X11/X.h>
#include <X11/keysym.h>
#define NEED_EVENTS
#define NEED_REPLIES
#include <X11/Xproto.h>
#include "misc.h"
#include "resource.h"
#include "inputstr.h"
#include "scrnintstr.h"
#include "cursorstr.h"
#include "dixstruct.h"
#include "globals.h"
#include "dixevents.h"
#include "mipointer.h"
#ifdef XKB
#include <X11/extensions/XKBproto.h>
#include <X11/extensions/XKBsrv.h>
extern Bool XkbCopyKeymap(XkbDescPtr src, XkbDescPtr dst, Bool sendNotifies);
#endif
#ifdef PANORAMIX
#include "panoramiX.h"
#include "panoramiXsrv.h"
#endif
#include <X11/extensions/XI.h>
#include <X11/extensions/XIproto.h>
#include "exglobals.h"
#include "exevents.h"
#include "exglobals.h"
#include "extnsionst.h"
/* Maximum number of valuators, divided by six, rounded up, to get number
* of events. */
#define MAX_VALUATOR_EVENTS 6
/* Number of motion history events to store. */
#define MOTION_HISTORY_SIZE 256
/**
* Pick some arbitrary size for Xi motion history.
*/
_X_EXPORT int
GetMotionHistorySize()
{
return MOTION_HISTORY_SIZE;
}
/**
* Allocate the motion history buffer.
*/
_X_EXPORT void
AllocateMotionHistory(DeviceIntPtr pDev)
{
if (pDev->valuator->motion)
xfree(pDev->valuator->motion);
if (pDev->valuator->numMotionEvents < 1)
return;
pDev->valuator->motion = xalloc(((sizeof(INT32) * pDev->valuator->numAxes) +
sizeof(Time)) *
pDev->valuator->numMotionEvents);
pDev->valuator->first_motion = 0;
pDev->valuator->last_motion = 0;
}
/**
* Dump the motion history between start and stop into the supplied buffer.
* Only records the event for a given screen in theory, but in practice, we
* sort of ignore this.
*/
_X_EXPORT int
GetMotionHistory(DeviceIntPtr pDev, xTimecoord *buff, unsigned long start,
unsigned long stop, ScreenPtr pScreen)
{
char *ibuff = NULL, *obuff = (char *) buff;
int i = 0, ret = 0;
Time current;
/* The size of a single motion event. */
int size = (sizeof(INT32) * pDev->valuator->numAxes) + sizeof(Time);
if (!pDev->valuator || !pDev->valuator->numMotionEvents)
return 0;
for (i = pDev->valuator->first_motion;
i != pDev->valuator->last_motion;
i = (i + 1) % pDev->valuator->numMotionEvents) {
/* We index the input buffer by which element we're accessing, which
* is not monotonic, and the output buffer by how many events we've
* written so far. */
ibuff = (char *) pDev->valuator->motion + (i * size);
memcpy(&current, ibuff, sizeof(Time));
if (current > stop) {
return ret;
}
else if (current >= start) {
memcpy(obuff, ibuff, size);
obuff += size;
ret++;
}
}
return ret;
}
/**
* Update the motion history for a specific device, with the list of
* valuators.
*/
static void
updateMotionHistory(DeviceIntPtr pDev, CARD32 ms, int first_valuator,
int num_valuators, int *valuators)
{
char *buff = (char *) pDev->valuator->motion;
if (!pDev->valuator->numMotionEvents)
return;
buff += ((sizeof(INT32) * pDev->valuator->numAxes) + sizeof(CARD32)) *
pDev->valuator->last_motion;
memcpy(buff, &ms, sizeof(Time));
buff += sizeof(Time);
bzero(buff, sizeof(INT32) * pDev->valuator->numAxes);
buff += sizeof(INT32) * first_valuator;
memcpy(buff, valuators, sizeof(INT32) * num_valuators);
pDev->valuator->last_motion = (pDev->valuator->last_motion + 1) %
pDev->valuator->numMotionEvents;
/* If we're wrapping around, just keep the circular buffer going. */
if (pDev->valuator->first_motion == pDev->valuator->last_motion)
pDev->valuator->first_motion = (pDev->valuator->first_motion + 1) %
pDev->valuator->numMotionEvents;
return;
}
/**
* Returns the maximum number of events GetKeyboardEvents,
* GetKeyboardValuatorEvents, and GetPointerEvents will ever return.
*
* Should be used in DIX as:
* xEvent *events = xcalloc(sizeof(xEvent), GetMaximumEventsNum());
*/
_X_EXPORT int
GetMaximumEventsNum() {
/* Two base events -- core and device, plus valuator events. Multiply
* by two if we're doing key repeats. */
int ret = 2 + MAX_VALUATOR_EVENTS;
#ifdef XKB
if (noXkbExtension)
#endif
ret *= 2;
return ret;
}
/* Originally a part of xf86PostMotionEvent; modifies valuators
* in-place. */
static void
acceleratePointer(DeviceIntPtr pDev, int first_valuator, int num_valuators,
int *valuators)
{
float mult = 0.0;
int dx = 0, dy = 0;
int *px = NULL, *py = NULL;
if (!num_valuators || !valuators)
return;
if (first_valuator == 0) {
dx = valuators[0];
px = &valuators[0];
}
if (first_valuator <= 1 && num_valuators >= (2 - first_valuator)) {
dy = valuators[1 - first_valuator];
py = &valuators[1 - first_valuator];
}
if (!dx && !dy)
return;
if (pDev->ptrfeed && pDev->ptrfeed->ctrl.num) {
/* modeled from xf86Events.c */
if (pDev->ptrfeed->ctrl.threshold) {
if ((abs(dx) + abs(dy)) >= pDev->ptrfeed->ctrl.threshold) {
pDev->valuator->dxremaind = ((float)dx *
(float)(pDev->ptrfeed->ctrl.num)) /
(float)(pDev->ptrfeed->ctrl.den) +
pDev->valuator->dxremaind;
if (px) {
*px = (int)pDev->valuator->dxremaind;
pDev->valuator->dxremaind = pDev->valuator->dxremaind -
(float)(*px);
}
pDev->valuator->dyremaind = ((float)dy *
(float)(pDev->ptrfeed->ctrl.num)) /
(float)(pDev->ptrfeed->ctrl.den) +
pDev->valuator->dyremaind;
if (py) {
*py = (int)pDev->valuator->dyremaind;
pDev->valuator->dyremaind = pDev->valuator->dyremaind -
(float)(*py);
}
}
}
else {
mult = pow((float)(dx * dx + dy * dy),
((float)(pDev->ptrfeed->ctrl.num) /
(float)(pDev->ptrfeed->ctrl.den) - 1.0) /
2.0) / 2.0;
if (dx) {
pDev->valuator->dxremaind = mult * (float)dx +
pDev->valuator->dxremaind;
*px = (int)pDev->valuator->dxremaind;
pDev->valuator->dxremaind = pDev->valuator->dxremaind -
(float)(*px);
}
if (dy) {
pDev->valuator->dyremaind = mult * (float)dy +
pDev->valuator->dyremaind;
*py = (int)pDev->valuator->dyremaind;
pDev->valuator->dyremaind = pDev->valuator->dyremaind -
(float)(*py);
}
}
}
}
/**
* Clip an axis to its bounds, which are declared in the call to
* InitValuatorAxisClassStruct.
*/
static void
clipAxis(DeviceIntPtr pDev, int axisNum, int *val)
{
AxisInfoPtr axes = pDev->valuator->axes + axisNum;
if (*val < axes->min_value)
*val = axes->min_value;
if (axes->max_value >= 0 && *val > axes->max_value)
*val = axes->max_value;
}
/**
* Clip every axis in the list of valuators to its bounds.
*/
static void
clipValuators(DeviceIntPtr pDev, int first_valuator, int num_valuators,
int *valuators)
{
AxisInfoPtr axes = pDev->valuator->axes + first_valuator;
int i;
for (i = 0; i < num_valuators; i++, axes++)
clipAxis(pDev, i + first_valuator, &(valuators[i]));
}
/**
* Fills events with valuator events for pDev, as given by the other
* parameters.
*
* FIXME: Need to fix ValuatorClassRec to store all the valuators as
* last posted, not just x and y; otherwise relative non-x/y
* valuators, though a very narrow use case, will be broken.
*/
static xEvent *
getValuatorEvents(xEvent *events, DeviceIntPtr pDev, int first_valuator,
int num_valuators, int *valuators) {
deviceValuator *xv = (deviceValuator *) events;
int i = 0, final_valuator = first_valuator + num_valuators;
for (i = first_valuator; i < final_valuator; i += 6, xv++, events++) {
xv->type = DeviceValuator;
xv->first_valuator = i;
xv->num_valuators = num_valuators;
xv->deviceid = pDev->id;
switch (final_valuator - i) {
case 6:
xv->valuator5 = valuators[i + 5];
case 5:
xv->valuator4 = valuators[i + 4];
case 4:
xv->valuator3 = valuators[i + 3];
case 3:
xv->valuator2 = valuators[i + 2];
case 2:
xv->valuator1 = valuators[i + 1];
case 1:
xv->valuator0 = valuators[i];
}
if (i + 6 < final_valuator)
xv->deviceid |= MORE_EVENTS;
}
return events;
}
/**
* Convenience wrapper around GetKeyboardValuatorEvents, that takes no
* valuators.
*/
_X_EXPORT int
GetKeyboardEvents(xEvent *events, DeviceIntPtr pDev, int type, int key_code) {
return GetKeyboardValuatorEvents(events, pDev, type, key_code, 0, 0, NULL);
}
/**
* Returns a set of keyboard events for KeyPress/KeyRelease, optionally
* also with valuator events. Handles Xi and XKB.
*
* events is not NULL-terminated; the return value is the number of events.
* The DDX is responsible for allocating the event structure in the first
* place via GetMaximumEventsNum(), and for freeing it.
*
* This function does not change the core keymap to that of the device;
* that is done by SwitchCoreKeyboard, which is called from
* mieqProcessInputEvents. If replacing that function, take care to call
* SetCoreKeyboard before processInputProc, so keymaps are altered to suit.
*
* Note that this function recurses! If called for non-XKB, a repeating
* key press will trigger a matching KeyRelease, as well as the
* KeyPresses.
*/
_X_EXPORT int
GetKeyboardValuatorEvents(xEvent *events, DeviceIntPtr pDev, int type,
int key_code, int first_valuator,
int num_valuators, int *valuators) {
int numEvents = 0;
CARD32 ms = 0;
KeySym *map = pDev->key->curKeySyms.map;
KeySym sym = map[key_code * pDev->key->curKeySyms.mapWidth];
deviceKeyButtonPointer *kbp = NULL;
if (!events)
return 0;
if (type != KeyPress && type != KeyRelease)
return 0;
if (!pDev->key || !pDev->focus || !pDev->kbdfeed ||
(pDev->coreEvents && !inputInfo.keyboard->key))
return 0;
if (pDev->coreEvents)
numEvents = 2;
else
numEvents = 1;
if (num_valuators) {
if ((num_valuators / 6) + 1 > MAX_VALUATOR_EVENTS)
num_valuators = MAX_VALUATOR_EVENTS;
numEvents += (num_valuators / 6) + 1;
}
#ifdef XKB
if (noXkbExtension)
#endif
{
switch (sym) {
case XK_Num_Lock:
case XK_Caps_Lock:
case XK_Scroll_Lock:
case XK_Shift_Lock:
if (type == KeyRelease)
return 0;
else if (type == KeyPress &&
(pDev->key->down[key_code >> 3] & (key_code & 7)) & 1)
type = KeyRelease;
}
}
/* Handle core repeating, via press/release/press/release.
* FIXME: In theory, if you're repeating with two keyboards in non-XKB,
* you could get unbalanced events here. */
if (type == KeyPress &&
(((pDev->key->down[key_code >> 3] & (key_code & 7))) & 1)) {
if (!pDev->kbdfeed->ctrl.autoRepeat ||
pDev->key->modifierMap[key_code] ||
!(pDev->kbdfeed->ctrl.autoRepeats[key_code >> 3]
& (1 << (key_code & 7))))
return 0;
#ifdef XKB
if (noXkbExtension)
#endif
{
numEvents += GetKeyboardValuatorEvents(events, pDev,
KeyRelease, key_code,
first_valuator, num_valuators,
valuators);
events += numEvents;
}
}
ms = GetTimeInMillis();
kbp = (deviceKeyButtonPointer *) events;
kbp->time = ms;
kbp->deviceid = pDev->id;
if (type == KeyPress)
kbp->type = DeviceKeyPress;
else if (type == KeyRelease)
kbp->type = DeviceKeyRelease;
events++;
if (num_valuators) {
kbp->deviceid |= MORE_EVENTS;
clipValuators(pDev, first_valuator, num_valuators, valuators);
events = getValuatorEvents(events, pDev, first_valuator,
num_valuators, valuators);
}
if (pDev->coreEvents) {
events->u.keyButtonPointer.time = ms;
events->u.u.type = type;
events->u.u.detail = key_code;
}
return numEvents;
}
/**
* Generate a series of xEvents (returned in xE) representing pointer
* motion, or button presses. Xi and XKB-aware.
*
* events is not NULL-terminated; the return value is the number of events.
* The DDX is responsible for allocating the event structure in the first
* place via GetMaximumEventsNum(), and for freeing it.
*/
_X_EXPORT int
GetPointerEvents(xEvent *events, DeviceIntPtr pDev, int type, int buttons,
int flags, int first_valuator, int num_valuators,
int *valuators) {
int num_events = 0, final_valuator = 0;
CARD32 ms = 0;
deviceKeyButtonPointer *kbp = NULL;
/* Thanks to a broken lib, we _always_ have to chase DeviceMotionNotifies
* with DeviceValuators. */
Bool sendValuators = (type == MotionNotify || flags & POINTER_ABSOLUTE);
DeviceIntPtr cp = inputInfo.pointer;
int x = 0, y = 0;
/* Sanity checks. */
if (type != MotionNotify && type != ButtonPress && type != ButtonRelease)
return 0;
if ((type == ButtonPress || type == ButtonRelease) && !pDev->button)
return 0;
if (pDev->coreEvents)
num_events = 2;
else
num_events = 1;
if (type == MotionNotify && num_valuators <= 0) {
return 0;
}
/* Do we need to send a DeviceValuator event? */
if (sendValuators) {
if ((((num_valuators - 1) / 6) + 1) > MAX_VALUATOR_EVENTS)
num_valuators = MAX_VALUATOR_EVENTS * 6;
num_events += ((num_valuators - 1) / 6) + 1;
}
final_valuator = num_valuators + first_valuator;
/* You fail. */
if (first_valuator < 0 || final_valuator > pDev->valuator->numAxes)
return 0;
ms = GetTimeInMillis();
kbp = (deviceKeyButtonPointer *) events;
kbp->time = ms;
kbp->deviceid = pDev->id;
/* Set x and y based on whether this is absolute or relative, and
* accelerate if we need to. */
if (flags & POINTER_ABSOLUTE) {
if (num_valuators >= 1 && first_valuator == 0) {
x = valuators[0];
}
else {
if (pDev->coreEvents)
x = cp->valuator->lastx;
else
x = pDev->valuator->lastx;
}
if (first_valuator <= 1 && num_valuators >= (2 - first_valuator)) {
y = valuators[1 - first_valuator];
}
else {
if (pDev->coreEvents)
y = cp->valuator->lasty;
else
y = pDev->valuator->lasty;
}
}
else {
if (flags & POINTER_ACCELERATE)
acceleratePointer(pDev, first_valuator, num_valuators,
valuators);
if (pDev->coreEvents) {
if (first_valuator == 0 && num_valuators >= 1)
x = cp->valuator->lastx + valuators[0];
else
x = cp->valuator->lastx;
if (first_valuator <= 1 && num_valuators >= (2 - first_valuator))
y = cp->valuator->lasty + valuators[1 - first_valuator];
else
y = cp->valuator->lasty;
}
else {
if (first_valuator == 0 && num_valuators >= 1)
x = pDev->valuator->lastx + valuators[0];
else
x = pDev->valuator->lastx;
if (first_valuator <= 1 && num_valuators >= (2 - first_valuator))
y = pDev->valuator->lasty + valuators[1 - first_valuator];
else
y = pDev->valuator->lasty;
}
}
/* Clip both x and y to the defined limits (usually co-ord space limit). */
clipAxis(pDev, 0, &x);
clipAxis(pDev, 1, &y);
/* This takes care of crossing screens for us, as well as clipping
* to the current screen. Right now, we only have one history buffer,
* so we don't set this for both the device and core.*/
miPointerSetPosition(pDev, &x, &y, ms);
/* Drop x and y back into the valuators list, if they were originally
* present. */
if (first_valuator == 0 && num_valuators >= 1)
valuators[0] = x;
if (first_valuator <= 1 && num_valuators >= (2 - first_valuator))
valuators[1 - first_valuator] = y;
updateMotionHistory(pDev, ms, first_valuator, num_valuators, valuators);
if (pDev->coreEvents) {
cp->valuator->lastx = x;
cp->valuator->lasty = y;
}
pDev->valuator->lastx = x;
pDev->valuator->lasty = y;
if (type == MotionNotify) {
kbp->type = DeviceMotionNotify;
}
else {
if (type == ButtonPress)
kbp->type = DeviceButtonPress;
else if (type == ButtonRelease)
kbp->type = DeviceButtonRelease;
kbp->detail = pDev->button->map[buttons];
}
kbp->root_x = x;
kbp->root_y = y;
events++;
if (sendValuators) {
kbp->deviceid |= MORE_EVENTS;
clipValuators(pDev, first_valuator, num_valuators, valuators);
events = getValuatorEvents(events, pDev, first_valuator,
num_valuators, valuators);
}
if (pDev->coreEvents) {
events->u.u.type = type;
events->u.keyButtonPointer.time = ms;
events->u.keyButtonPointer.rootX = x;
events->u.keyButtonPointer.rootY = y;
if (type == ButtonPress || type == ButtonRelease) {
/* We hijack SetPointerMapping to work on all core-sending
* devices, so we use the device-specific map here instead of
* the core one. */
events->u.u.detail = pDev->button->map[buttons];
}
else {
events->u.u.detail = 0;
}
}
return num_events;
}
/**
* Post ProximityIn/ProximityOut events, accompanied by valuators.
*
* events is not NULL-terminated; the return value is the number of events.
* The DDX is responsible for allocating the event structure in the first
* place via GetMaximumEventsNum(), and for freeing it.
*/
_X_EXPORT int
GetProximityEvents(xEvent *events, DeviceIntPtr pDev, int type,
int first_valuator, int num_valuators, int *valuators)
{
int num_events = 0;
deviceKeyButtonPointer *kbp = (deviceKeyButtonPointer *) events;
/* Sanity checks. */
if (type != ProximityIn && type != ProximityOut)
return 0;
if (!pDev->valuator)
return 0;
/* Do we need to send a DeviceValuator event? */
if ((pDev->valuator->mode & 1) == Relative)
num_valuators = 0;
if (num_valuators) {
if ((((num_valuators - 1) / 6) + 1) > MAX_VALUATOR_EVENTS)
num_valuators = MAX_VALUATOR_EVENTS * 6;
num_events += ((num_valuators - 1) / 6) + 1;
}
/* You fail. */
if (first_valuator < 0 ||
(num_valuators + first_valuator) > pDev->valuator->numAxes)
return 0;
kbp->type = type;
kbp->deviceid = pDev->id;
kbp->detail = 0;
kbp->time = GetTimeInMillis();
if (num_valuators) {
kbp->deviceid |= MORE_EVENTS;
events++;
clipValuators(pDev, first_valuator, num_valuators, valuators);
events = getValuatorEvents(events, pDev, first_valuator,
num_valuators, valuators);
}
return num_events;
}
/**
* Note that pDev was the last device to send a core event. This function
* copies the complete keymap from the originating device to the core
* device, and makes sure the appropriate notifications are generated.
*
* Call this just before processInputProc.
*/
_X_EXPORT void
SwitchCoreKeyboard(DeviceIntPtr pDev)
{
KeyClassPtr ckeyc = inputInfo.keyboard->key;
if (inputInfo.keyboard->devPrivates[CoreDevicePrivatesIndex].ptr != pDev) {
memcpy(ckeyc->modifierMap, pDev->key->modifierMap, MAP_LENGTH);
if (ckeyc->modifierKeyMap)
xfree(ckeyc->modifierKeyMap);
ckeyc->modifierKeyMap = xalloc(8 * pDev->key->maxKeysPerModifier);
memcpy(ckeyc->modifierKeyMap, pDev->key->modifierKeyMap,
(8 * pDev->key->maxKeysPerModifier));
ckeyc->maxKeysPerModifier = pDev->key->maxKeysPerModifier;
ckeyc->curKeySyms.minKeyCode = pDev->key->curKeySyms.minKeyCode;
ckeyc->curKeySyms.maxKeyCode = pDev->key->curKeySyms.maxKeyCode;
SetKeySymsMap(&ckeyc->curKeySyms, &pDev->key->curKeySyms);
#ifdef XKB
if (!noXkbExtension && pDev->key->xkbInfo && pDev->key->xkbInfo->desc) {
if (!XkbCopyKeymap(pDev->key->xkbInfo->desc, ckeyc->xkbInfo->desc,
True))
FatalError("Couldn't pivot keymap from device to core!\n");
}
#endif
SendMappingNotify(MappingKeyboard, ckeyc->curKeySyms.minKeyCode,
(ckeyc->curKeySyms.maxKeyCode -
ckeyc->curKeySyms.minKeyCode),
serverClient);
inputInfo.keyboard->devPrivates[CoreDevicePrivatesIndex].ptr = pDev;
}
}
/**
* Note that pDev was the last function to send a core pointer event.
* Currently a no-op.
*
* Call this just before processInputProc.
*/
_X_EXPORT void
SwitchCorePointer(DeviceIntPtr pDev)
{
if (inputInfo.pointer->devPrivates[CoreDevicePrivatesIndex].ptr != pDev)
inputInfo.pointer->devPrivates[CoreDevicePrivatesIndex].ptr = pDev;
}
/**
* Synthesize a single motion event for the core pointer.
*
* Used in cursor functions, e.g. when cursor confinement changes, and we need
* to shift the pointer to get it inside the new bounds.
*/
void
PostSyntheticMotion(int x, int y, ScreenPtr pScreen, unsigned long time)
{
xEvent xE;
#ifdef PANORAMIX
/* Translate back to the sprite screen since processInputProc
will translate from sprite screen to screen 0 upon reentry
to the DIX layer. */
if (!noPanoramiXExtension) {
x += panoramiXdataPtr[0].x - panoramiXdataPtr[pScreen->myNum].x;
y += panoramiXdataPtr[0].y - panoramiXdataPtr[pScreen->myNum].y;
}
#endif
memset(&xE, 0, sizeof(xEvent));
xE.u.u.type = MotionNotify;
xE.u.keyButtonPointer.rootX = x;
xE.u.keyButtonPointer.rootY = y;
xE.u.keyButtonPointer.time = time;
(*inputInfo.pointer->public.processInputProc)(&xE, inputInfo.pointer, 1);
}
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