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xenocara/xserver/dix/getevents.c
matthieu fe11647d1f Update to xserver 1.12.3.
2012-08-05 18:11:37 +00:00

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/*
* Copyright © 2006 Nokia Corporation
* Copyright © 2006-2007 Daniel Stone
* Copyright © 2008 Red Hat, Inc.
* Copyright © 2011 The Chromium Authors
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Authors: Daniel Stone <daniel@fooishbar.org>
* Peter Hutterer <peter.hutterer@who-t.net>
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <X11/X.h>
#include <X11/keysym.h>
#include <X11/Xproto.h>
#include <math.h>
#include <limits.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"
#include "eventstr.h"
#include "eventconvert.h"
#include "inpututils.h"
#include "mi.h"
#include "windowstr.h"
#include <X11/extensions/XKBproto.h>
#include "xkbsrv.h"
#ifdef PANORAMIX
#include "panoramiX.h"
#include "panoramiXsrv.h"
#endif
#include <X11/extensions/XI.h>
#include <X11/extensions/XI2.h>
#include <X11/extensions/XIproto.h>
#include <pixman.h>
#include "exglobals.h"
#include "exevents.h"
#include "extnsionst.h"
#include "listdev.h" /* for sizing up DeviceClassesChangedEvent */
/* Number of motion history events to store. */
#define MOTION_HISTORY_SIZE 256
/**
* InputEventList is the storage for input events generated by
* QueuePointerEvents, QueueKeyboardEvents, and QueueProximityEvents.
* This list is allocated on startup by the DIX.
*/
InternalEvent *InputEventList = NULL;
/**
* Pick some arbitrary size for Xi motion history.
*/
int
GetMotionHistorySize(void)
{
return MOTION_HISTORY_SIZE;
}
void
set_button_down(DeviceIntPtr pDev, int button, int type)
{
if (type == BUTTON_PROCESSED)
SetBit(pDev->button->down, button);
else
SetBit(pDev->button->postdown, button);
}
void
set_button_up(DeviceIntPtr pDev, int button, int type)
{
if (type == BUTTON_PROCESSED)
ClearBit(pDev->button->down, button);
else
ClearBit(pDev->button->postdown, button);
}
Bool
button_is_down(DeviceIntPtr pDev, int button, int type)
{
Bool ret = FALSE;
if (type & BUTTON_PROCESSED)
ret = ret || BitIsOn(pDev->button->down, button);
if (type & BUTTON_POSTED)
ret = ret || BitIsOn(pDev->button->postdown, button);
return ret;
}
void
set_key_down(DeviceIntPtr pDev, int key_code, int type)
{
if (type == KEY_PROCESSED)
SetBit(pDev->key->down, key_code);
else
SetBit(pDev->key->postdown, key_code);
}
void
set_key_up(DeviceIntPtr pDev, int key_code, int type)
{
if (type == KEY_PROCESSED)
ClearBit(pDev->key->down, key_code);
else
ClearBit(pDev->key->postdown, key_code);
}
Bool
key_is_down(DeviceIntPtr pDev, int key_code, int type)
{
Bool ret = FALSE;
if (type & KEY_PROCESSED)
ret = ret || BitIsOn(pDev->key->down, key_code);
if (type & KEY_POSTED)
ret = ret || BitIsOn(pDev->key->postdown, key_code);
return ret;
}
static Bool
key_autorepeats(DeviceIntPtr pDev, int key_code)
{
return ! !(pDev->kbdfeed->ctrl.autoRepeats[key_code >> 3] &
(1 << (key_code & 7)));
}
static void
init_event(DeviceIntPtr dev, DeviceEvent *event, Time ms)
{
memset(event, 0, sizeof(DeviceEvent));
event->header = ET_Internal;
event->length = sizeof(DeviceEvent);
event->time = ms;
event->deviceid = dev->id;
event->sourceid = dev->id;
}
static void
init_touch_ownership(DeviceIntPtr dev, TouchOwnershipEvent *event, Time ms)
{
memset(event, 0, sizeof(TouchOwnershipEvent));
event->header = ET_Internal;
event->type = ET_TouchOwnership;
event->length = sizeof(TouchOwnershipEvent);
event->time = ms;
event->deviceid = dev->id;
}
static void
init_raw(DeviceIntPtr dev, RawDeviceEvent *event, Time ms, int type, int detail)
{
memset(event, 0, sizeof(RawDeviceEvent));
event->header = ET_Internal;
event->length = sizeof(RawDeviceEvent);
switch (type) {
case MotionNotify:
event->type = ET_RawMotion;
break;
case ButtonPress:
event->type = ET_RawButtonPress;
break;
case ButtonRelease:
event->type = ET_RawButtonRelease;
break;
case KeyPress:
event->type = ET_RawKeyPress;
break;
case KeyRelease:
event->type = ET_RawKeyRelease;
break;
case XI_TouchBegin:
event->type = ET_RawTouchBegin;
break;
case XI_TouchUpdate:
event->type = ET_RawTouchUpdate;
break;
case XI_TouchEnd:
event->type = ET_RawTouchEnd;
break;
}
event->time = ms;
event->deviceid = dev->id;
event->sourceid = dev->id;
event->detail.button = detail;
}
static void
set_raw_valuators(RawDeviceEvent *event, ValuatorMask *mask, double *data)
{
int i;
for (i = 0; i < valuator_mask_size(mask); i++) {
if (valuator_mask_isset(mask, i)) {
SetBit(event->valuators.mask, i);
data[i] = valuator_mask_get_double(mask, i);
}
}
}
static void
set_valuators(DeviceIntPtr dev, DeviceEvent *event, ValuatorMask *mask)
{
int i;
/* Set the data to the previous value for unset absolute axes. The values
* may be used when sent as part of an XI 1.x valuator event. */
for (i = 0; i < valuator_mask_size(mask); i++) {
if (valuator_mask_isset(mask, i)) {
SetBit(event->valuators.mask, i);
if (valuator_get_mode(dev, i) == Absolute)
SetBit(event->valuators.mode, i);
event->valuators.data[i] = valuator_mask_get_double(mask, i);
}
else if (valuator_get_mode(dev, i) == Absolute)
event->valuators.data[i] = dev->valuator->axisVal[i];
}
}
void
CreateClassesChangedEvent(InternalEvent *event,
DeviceIntPtr master, DeviceIntPtr slave, int flags)
{
int i;
DeviceChangedEvent *dce;
CARD32 ms = GetTimeInMillis();
dce = &event->changed_event;
memset(dce, 0, sizeof(DeviceChangedEvent));
dce->deviceid = slave->id;
dce->masterid = master ? master->id : 0;
dce->header = ET_Internal;
dce->length = sizeof(DeviceChangedEvent);
dce->type = ET_DeviceChanged;
dce->time = ms;
dce->flags = flags;
dce->sourceid = slave->id;
if (slave->button) {
dce->buttons.num_buttons = slave->button->numButtons;
for (i = 0; i < dce->buttons.num_buttons; i++)
dce->buttons.names[i] = slave->button->labels[i];
}
if (slave->valuator) {
dce->num_valuators = slave->valuator->numAxes;
for (i = 0; i < dce->num_valuators; i++) {
dce->valuators[i].min = slave->valuator->axes[i].min_value;
dce->valuators[i].max = slave->valuator->axes[i].max_value;
dce->valuators[i].resolution = slave->valuator->axes[i].resolution;
dce->valuators[i].mode = slave->valuator->axes[i].mode;
dce->valuators[i].name = slave->valuator->axes[i].label;
dce->valuators[i].scroll = slave->valuator->axes[i].scroll;
}
}
if (slave->key) {
dce->keys.min_keycode = slave->key->xkbInfo->desc->min_key_code;
dce->keys.max_keycode = slave->key->xkbInfo->desc->max_key_code;
}
}
/**
* Rescale the coord between the two axis ranges.
*/
static double
rescaleValuatorAxis(double coord, AxisInfoPtr from, AxisInfoPtr to,
double defmin, double defmax)
{
double fmin = defmin, fmax = defmax;
double tmin = defmin, tmax = defmax;
if (from && from->min_value < from->max_value) {
fmin = from->min_value;
fmax = from->max_value;
}
if (to && to->min_value < to->max_value) {
tmin = to->min_value;
tmax = to->max_value;
}
if (fmin == tmin && fmax == tmax)
return coord;
if (fmax == fmin) /* avoid division by 0 */
return 0.0;
return (coord - fmin) * (tmax - tmin) / (fmax - fmin) + tmin;
}
/**
* Update all coordinates when changing to a different SD
* to ensure that relative reporting will work as expected
* without loss of precision.
*
* pDev->last.valuators will be in absolute device coordinates after this
* function.
*/
static void
updateSlaveDeviceCoords(DeviceIntPtr master, DeviceIntPtr pDev)
{
int i;
DeviceIntPtr lastSlave;
/* master->last.valuators[0]/[1] is in desktop-wide coords and the actual
* position of the pointer */
pDev->last.valuators[0] = master->last.valuators[0];
pDev->last.valuators[1] = master->last.valuators[1];
if (!pDev->valuator)
return;
/* scale back to device coordinates */
if (pDev->valuator->numAxes > 0) {
pDev->last.valuators[0] = rescaleValuatorAxis(pDev->last.valuators[0],
NULL,
pDev->valuator->axes + 0,
screenInfo.x,
screenInfo.width);
}
if (pDev->valuator->numAxes > 1) {
pDev->last.valuators[1] = rescaleValuatorAxis(pDev->last.valuators[1],
NULL,
pDev->valuator->axes + 1,
screenInfo.y,
screenInfo.height);
}
/* calculate the other axis as well based on info from the old
* slave-device. If the old slave had less axes than this one,
* last.valuators is reset to 0.
*/
if ((lastSlave = master->last.slave) && lastSlave->valuator) {
for (i = 2; i < pDev->valuator->numAxes; i++) {
if (i >= lastSlave->valuator->numAxes) {
pDev->last.valuators[i] = 0;
valuator_mask_set_double(pDev->last.scroll, i, 0);
}
else {
double val = pDev->last.valuators[i];
val = rescaleValuatorAxis(val, lastSlave->valuator->axes + i,
pDev->valuator->axes + i, 0, 0);
pDev->last.valuators[i] = val;
valuator_mask_set_double(pDev->last.scroll, i, val);
}
}
}
}
/**
* Allocate the motion history buffer.
*/
void
AllocateMotionHistory(DeviceIntPtr pDev)
{
int size;
free(pDev->valuator->motion);
if (pDev->valuator->numMotionEvents < 1)
return;
/* An MD must have a motion history size large enough to keep all
* potential valuators, plus the respective range of the valuators.
* 3 * INT32 for (min_val, max_val, curr_val))
*/
if (IsMaster(pDev))
size = sizeof(INT32) * 3 * MAX_VALUATORS;
else {
ValuatorClassPtr v = pDev->valuator;
int numAxes;
/* XI1 doesn't understand mixed mode devices */
for (numAxes = 0; numAxes < v->numAxes; numAxes++)
if (valuator_get_mode(pDev, numAxes) != valuator_get_mode(pDev, 0))
break;
size = sizeof(INT32) * numAxes;
}
size += sizeof(Time);
pDev->valuator->motion = calloc(pDev->valuator->numMotionEvents, size);
pDev->valuator->first_motion = 0;
pDev->valuator->last_motion = 0;
if (!pDev->valuator->motion)
ErrorF("[dix] %s: Failed to alloc motion history (%d bytes).\n",
pDev->name, size * pDev->valuator->numMotionEvents);
}
/**
* 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.
*
* If core is set, we only generate x/y, in INT16, scaled to screen coords.
*/
int
GetMotionHistory(DeviceIntPtr pDev, xTimecoord ** buff, unsigned long start,
unsigned long stop, ScreenPtr pScreen, BOOL core)
{
char *ibuff = NULL, *obuff;
int i = 0, ret = 0;
int j, coord;
Time current;
/* The size of a single motion event. */
int size;
AxisInfo from, *to; /* for scaling */
INT32 *ocbuf, *icbuf; /* pointer to coordinates for copying */
INT16 *corebuf;
AxisInfo core_axis = { 0 };
if (!pDev->valuator || !pDev->valuator->numMotionEvents)
return 0;
if (core && !pScreen)
return 0;
if (IsMaster(pDev))
size = (sizeof(INT32) * 3 * MAX_VALUATORS) + sizeof(Time);
else
size = (sizeof(INT32) * pDev->valuator->numAxes) + sizeof(Time);
*buff = malloc(size * pDev->valuator->numMotionEvents);
if (!(*buff))
return 0;
obuff = (char *) *buff;
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) {
if (core) {
memcpy(obuff, ibuff, sizeof(Time)); /* copy timestamp */
icbuf = (INT32 *) (ibuff + sizeof(Time));
corebuf = (INT16 *) (obuff + sizeof(Time));
/* fetch x coordinate + range */
memcpy(&from.min_value, icbuf++, sizeof(INT32));
memcpy(&from.max_value, icbuf++, sizeof(INT32));
memcpy(&coord, icbuf++, sizeof(INT32));
/* scale to screen coords */
to = &core_axis;
to->max_value = pScreen->width;
coord =
rescaleValuatorAxis(coord, &from, to, 0, pScreen->width);
memcpy(corebuf, &coord, sizeof(INT16));
corebuf++;
/* fetch y coordinate + range */
memcpy(&from.min_value, icbuf++, sizeof(INT32));
memcpy(&from.max_value, icbuf++, sizeof(INT32));
memcpy(&coord, icbuf++, sizeof(INT32));
to->max_value = pScreen->height;
coord =
rescaleValuatorAxis(coord, &from, to, 0, pScreen->height);
memcpy(corebuf, &coord, sizeof(INT16));
}
else if (IsMaster(pDev)) {
memcpy(obuff, ibuff, sizeof(Time)); /* copy timestamp */
ocbuf = (INT32 *) (obuff + sizeof(Time));
icbuf = (INT32 *) (ibuff + sizeof(Time));
for (j = 0; j < MAX_VALUATORS; j++) {
if (j >= pDev->valuator->numAxes)
break;
/* fetch min/max/coordinate */
memcpy(&from.min_value, icbuf++, sizeof(INT32));
memcpy(&from.max_value, icbuf++, sizeof(INT32));
memcpy(&coord, icbuf++, sizeof(INT32));
to = (j <
pDev->valuator->numAxes) ? &pDev->valuator->
axes[j] : NULL;
/* x/y scaled to screen if no range is present */
if (j == 0 && (from.max_value < from.min_value))
from.max_value = pScreen->width;
else if (j == 1 && (from.max_value < from.min_value))
from.max_value = pScreen->height;
/* scale from stored range into current range */
coord = rescaleValuatorAxis(coord, &from, to, 0, 0);
memcpy(ocbuf, &coord, sizeof(INT32));
ocbuf++;
}
}
else
memcpy(obuff, ibuff, size);
/* don't advance by size here. size may be different to the
* actually written size if the MD has less valuators than MAX */
if (core)
obuff += sizeof(INT32) + sizeof(Time);
else
obuff +=
(sizeof(INT32) * pDev->valuator->numAxes) + sizeof(Time);
ret++;
}
}
return ret;
}
/**
* Update the motion history for a specific device, with the list of
* valuators.
*
* Layout of the history buffer:
* for SDs: [time] [val0] [val1] ... [valn]
* for MDs: [time] [min_val0] [max_val0] [val0] [min_val1] ... [valn]
*
* For events that have some valuators unset:
* min_val == max_val == val == 0.
*/
static void
updateMotionHistory(DeviceIntPtr pDev, CARD32 ms, ValuatorMask *mask,
double *valuators)
{
char *buff = (char *) pDev->valuator->motion;
ValuatorClassPtr v;
int i;
if (!pDev->valuator->numMotionEvents)
return;
v = pDev->valuator;
if (IsMaster(pDev)) {
buff += ((sizeof(INT32) * 3 * MAX_VALUATORS) + sizeof(CARD32)) *
v->last_motion;
memcpy(buff, &ms, sizeof(Time));
buff += sizeof(Time);
memset(buff, 0, sizeof(INT32) * 3 * MAX_VALUATORS);
for (i = 0; i < v->numAxes; i++) {
int val;
/* XI1 doesn't support mixed mode devices */
if (valuator_get_mode(pDev, i) != valuator_get_mode(pDev, 0))
break;
if (valuator_mask_size(mask) <= i || !valuator_mask_isset(mask, i)) {
buff += 3 * sizeof(INT32);
continue;
}
memcpy(buff, &v->axes[i].min_value, sizeof(INT32));
buff += sizeof(INT32);
memcpy(buff, &v->axes[i].max_value, sizeof(INT32));
buff += sizeof(INT32);
val = valuators[i];
memcpy(buff, &val, sizeof(INT32));
buff += sizeof(INT32);
}
}
else {
buff += ((sizeof(INT32) * pDev->valuator->numAxes) + sizeof(CARD32)) *
pDev->valuator->last_motion;
memcpy(buff, &ms, sizeof(Time));
buff += sizeof(Time);
memset(buff, 0, sizeof(INT32) * pDev->valuator->numAxes);
for (i = 0; i < MAX_VALUATORS; i++) {
int val;
if (valuator_mask_size(mask) <= i || !valuator_mask_isset(mask, i)) {
buff += sizeof(INT32);
continue;
}
val = valuators[i];
memcpy(buff, &val, sizeof(INT32));
buff += sizeof(INT32);
}
}
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
* and GetPointerEvents will ever return.
*
* This MUST be absolutely constant, from init until exit.
*/
int
GetMaximumEventsNum(void)
{
/* One raw event
* One device event
* One possible device changed event
* Lots of possible separate button scroll events (horiz + vert)
* Lots of possible separate raw button scroll events (horiz + vert)
*/
return 100;
}
/**
* Clip an axis to its bounds, which are declared in the call to
* InitValuatorAxisClassStruct.
*/
static void
clipAxis(DeviceIntPtr pDev, int axisNum, double *val)
{
AxisInfoPtr axis;
if (axisNum >= pDev->valuator->numAxes)
return;
axis = pDev->valuator->axes + axisNum;
/* If a value range is defined, clip. If not, do nothing */
if (axis->max_value <= axis->min_value)
return;
if (*val < axis->min_value)
*val = axis->min_value;
if (*val > axis->max_value)
*val = axis->max_value;
}
/**
* Clip every axis in the list of valuators to its bounds.
*/
static void
clipValuators(DeviceIntPtr pDev, ValuatorMask *mask)
{
int i;
for (i = 0; i < valuator_mask_size(mask); i++)
if (valuator_mask_isset(mask, i)) {
double val = valuator_mask_get_double(mask, i);
clipAxis(pDev, i, &val);
valuator_mask_set_double(mask, i, val);
}
}
/**
* Create the DCCE event (does not update the master's device state yet, this
* is done in the event processing).
* Pull in the coordinates from the MD if necessary.
*
* @param events Pointer to a pre-allocated event array.
* @param dev The slave device that generated an event.
* @param type Either DEVCHANGE_POINTER_EVENT and/or DEVCHANGE_KEYBOARD_EVENT
* @param num_events The current number of events, returns the number of
* events if a DCCE was generated.
* @return The updated @events pointer.
*/
InternalEvent *
UpdateFromMaster(InternalEvent *events, DeviceIntPtr dev, int type,
int *num_events)
{
DeviceIntPtr master;
master =
GetMaster(dev,
(type & DEVCHANGE_POINTER_EVENT) ? MASTER_POINTER :
MASTER_KEYBOARD);
if (master && master->last.slave != dev) {
CreateClassesChangedEvent(events, master, dev,
type | DEVCHANGE_SLAVE_SWITCH);
if (IsPointerDevice(master)) {
updateSlaveDeviceCoords(master, dev);
master->last.numValuators = dev->last.numValuators;
}
master->last.slave = dev;
(*num_events)++;
events++;
}
return events;
}
/**
* Move the device's pointer to the position given in the valuators.
*
* @param dev The device whose pointer is to be moved.
* @param mask Valuator data for this event.
*/
static void
clipAbsolute(DeviceIntPtr dev, ValuatorMask *mask)
{
int i;
for (i = 0; i < valuator_mask_size(mask); i++) {
double val;
if (!valuator_mask_isset(mask, i))
continue;
val = valuator_mask_get_double(mask, i);
clipAxis(dev, i, &val);
valuator_mask_set_double(mask, i, val);
}
}
static void
add_to_scroll_valuator(DeviceIntPtr dev, ValuatorMask *mask, int valuator, double value)
{
double v;
if (!valuator_mask_fetch_double(mask, valuator, &v))
return;
/* protect against scrolling overflow. INT_MAX for double, because
* we'll eventually write this as 32.32 fixed point */
if ((value > 0 && v > INT_MAX - value) || (value < 0 && v < INT_MIN - value)) {
v = 0;
/* reset last.scroll to avoid a button storm */
valuator_mask_set_double(dev->last.scroll, valuator, 0);
}
else
v += value;
valuator_mask_set_double(mask, valuator, v);
}
/**
* Move the device's pointer by the values given in @valuators.
*
* @param dev The device whose pointer is to be moved.
* @param[in,out] mask Valuator data for this event, modified in-place.
*/
static void
moveRelative(DeviceIntPtr dev, ValuatorMask *mask)
{
int i;
Bool clip_xy = IsMaster(dev) || !IsFloating(dev);
/* calc other axes, clip, drop back into valuators */
for (i = 0; i < valuator_mask_size(mask); i++) {
double val = dev->last.valuators[i];
if (!valuator_mask_isset(mask, i))
continue;
add_to_scroll_valuator(dev, mask, i, val);
/* x & y need to go over the limits to cross screens if the SD
* isn't currently attached; otherwise, clip to screen bounds. */
if (valuator_get_mode(dev, i) == Absolute &&
((i != 0 && i != 1) || clip_xy)) {
val = valuator_mask_get_double(mask, i);
clipAxis(dev, i, &val);
valuator_mask_set_double(mask, i, val);
}
}
}
/**
* Accelerate the data in valuators based on the device's acceleration scheme.
*
* @param dev The device which's pointer is to be moved.
* @param valuators Valuator mask
* @param ms Current time.
*/
static void
accelPointer(DeviceIntPtr dev, ValuatorMask *valuators, CARD32 ms)
{
if (dev->valuator->accelScheme.AccelSchemeProc)
dev->valuator->accelScheme.AccelSchemeProc(dev, valuators, ms);
}
/**
* Scale from absolute screen coordinates to absolute coordinates in the
* device's coordinate range.
*
* @param dev The device to scale for.
* @param[in, out] mask The mask in desktop coordinates, modified in place
* to contain device coordinate range.
*/
static void
scale_from_screen(DeviceIntPtr dev, ValuatorMask *mask)
{
double scaled;
ScreenPtr scr = miPointerGetScreen(dev);
if (valuator_mask_isset(mask, 0)) {
scaled = valuator_mask_get_double(mask, 0) + scr->x;
scaled = rescaleValuatorAxis(scaled,
NULL, dev->valuator->axes + 0,
0, scr->width);
valuator_mask_set_double(mask, 0, scaled);
}
if (valuator_mask_isset(mask, 1)) {
scaled = valuator_mask_get_double(mask, 1) + scr->y;
scaled = rescaleValuatorAxis(scaled,
NULL, dev->valuator->axes + 1,
0, scr->height);
valuator_mask_set_double(mask, 1, scaled);
}
}
/**
* Scale from (absolute) device to screen coordinates here,
*
* The coordinates provided are always absolute. see fill_pointer_events for
* information on coordinate systems.
*
* @param dev The device to be moved.
* @param mask Mask of axis values for this event
* @param[out] devx x desktop-wide coordinate in device coordinate system
* @param[out] devy y desktop-wide coordinate in device coordinate system
* @param[out] screenx x coordinate in desktop coordinate system
* @param[out] screeny y coordinate in desktop coordinate system
*/
static ScreenPtr
scale_to_desktop(DeviceIntPtr dev, ValuatorMask *mask,
double *devx, double *devy, double *screenx, double *screeny)
{
ScreenPtr scr = miPointerGetScreen(dev);
double x, y;
BUG_WARN(dev->valuator && dev->valuator->numAxes < 2);
if (!dev->valuator || dev->valuator->numAxes < 2) {
/* if we have no axes, last.valuators must be in screen coords
* anyway */
*devx = *screenx = dev->last.valuators[0];
*devy = *screeny = dev->last.valuators[1];
return scr;
}
if (valuator_mask_isset(mask, 0))
x = valuator_mask_get_double(mask, 0);
else
x = dev->last.valuators[0];
if (valuator_mask_isset(mask, 1))
y = valuator_mask_get_double(mask, 1);
else
y = dev->last.valuators[1];
/* scale x&y to desktop coordinates */
*screenx = rescaleValuatorAxis(x, dev->valuator->axes + 0, NULL,
screenInfo.x, screenInfo.width);
*screeny = rescaleValuatorAxis(y, dev->valuator->axes + 1, NULL,
screenInfo.y, screenInfo.height);
*devx = x;
*devy = y;
return scr;
}
/**
* If we have HW cursors, this actually moves the visible sprite. If not, we
* just do all the screen crossing, etc.
*
* We use the screen coordinates here, call miPointerSetPosition() and then
* scale back into device coordinates (if needed). miPSP will change x/y if
* the screen was crossed.
*
* The coordinates provided are always absolute. The parameter mode
* specifies whether it was relative or absolute movement that landed us at
* those coordinates. see fill_pointer_events for information on coordinate
* systems.
*
* @param dev The device to be moved.
* @param mode Movement mode (Absolute or Relative)
* @param[out] mask Mask of axis values for this event, returns the
* per-screen device coordinates after confinement
* @param[in,out] devx x desktop-wide coordinate in device coordinate system
* @param[in,out] devy y desktop-wide coordinate in device coordinate system
* @param[in,out] screenx x coordinate in desktop coordinate system
* @param[in,out] screeny y coordinate in desktop coordinate system
*/
static ScreenPtr
positionSprite(DeviceIntPtr dev, int mode, ValuatorMask *mask,
double *devx, double *devy, double *screenx, double *screeny)
{
ScreenPtr scr = miPointerGetScreen(dev);
double tmpx, tmpy;
if (!dev->valuator || dev->valuator->numAxes < 2)
return scr;
tmpx = *screenx;
tmpy = *screeny;
/* miPointerSetPosition takes care of crossing screens for us, as well as
* clipping to the current screen. Coordinates returned are in desktop
* coord system */
scr = miPointerSetPosition(dev, mode, screenx, screeny);
/* If we were constrained, rescale x/y from the screen coordinates so
* the device valuators reflect the correct position. For screen
* crossing this doesn't matter much, the coords would be 0 or max.
*/
if (tmpx != *screenx)
*devx = rescaleValuatorAxis(*screenx, NULL, dev->valuator->axes + 0,
screenInfo.x, screenInfo.width);
if (tmpy != *screeny)
*devy = rescaleValuatorAxis(*screeny, NULL, dev->valuator->axes + 1,
screenInfo.y, screenInfo.height);
/* Recalculate the per-screen device coordinates */
if (valuator_mask_isset(mask, 0)) {
double x;
x = rescaleValuatorAxis(*screenx - scr->x, NULL,
dev->valuator->axes + 0, 0, scr->width);
valuator_mask_set_double(mask, 0, x);
}
if (valuator_mask_isset(mask, 1)) {
double y;
y = rescaleValuatorAxis(*screeny - scr->y, NULL,
dev->valuator->axes + 1, 0, scr->height);
valuator_mask_set_double(mask, 1, y);
}
return scr;
}
/**
* Update the motion history for the device and (if appropriate) for its
* master device.
* @param dev Slave device to update.
* @param mask Bit mask of valid valuators to append to history.
* @param num Total number of valuators to append to history.
* @param ms Current time
*/
static void
updateHistory(DeviceIntPtr dev, ValuatorMask *mask, CARD32 ms)
{
if (!dev->valuator)
return;
updateMotionHistory(dev, ms, mask, dev->last.valuators);
if (!IsMaster(dev) && !IsFloating(dev)) {
DeviceIntPtr master = GetMaster(dev, MASTER_POINTER);
updateMotionHistory(master, ms, mask, dev->last.valuators);
}
}
static void
queueEventList(DeviceIntPtr device, InternalEvent *events, int nevents)
{
int i;
for (i = 0; i < nevents; i++)
mieqEnqueue(device, &events[i]);
}
static void
event_set_root_coordinates(DeviceEvent *event, double x, double y)
{
event->root_x = trunc(x);
event->root_y = trunc(y);
event->root_x_frac = x - trunc(x);
event->root_y_frac = y - trunc(y);
}
/**
* Generate internal events representing this keyboard event and enqueue
* them on the event queue.
*
* This function is not reentrant. Disable signals before calling.
*
* FIXME: flags for relative/abs motion?
*
* @param device The device to generate the event for
* @param type Event type, one of KeyPress or KeyRelease
* @param keycode Key code of the pressed/released key
* @param mask Valuator mask for valuators present for this event.
*
*/
void
QueueKeyboardEvents(DeviceIntPtr device, int type,
int keycode, const ValuatorMask *mask)
{
int nevents;
nevents = GetKeyboardEvents(InputEventList, device, type, keycode, mask);
queueEventList(device, InputEventList, nevents);
}
/**
* Returns a set of InternalEvents for KeyPress/KeyRelease, optionally
* also with valuator events.
*
* The DDX is responsible for allocating the event list in the first
* place via InitEventList(), and for freeing it.
*
* @return the number of events written into events.
*/
int
GetKeyboardEvents(InternalEvent *events, DeviceIntPtr pDev, int type,
int key_code, const ValuatorMask *mask_in)
{
int num_events = 0;
CARD32 ms = 0;
DeviceEvent *event;
RawDeviceEvent *raw;
ValuatorMask mask;
/* refuse events from disabled devices */
if (!pDev->enabled)
return 0;
if (!events || !pDev->key || !pDev->focus || !pDev->kbdfeed ||
(type != KeyPress && type != KeyRelease) ||
(key_code < 8 || key_code > 255))
return 0;
if (mask_in && valuator_mask_size(mask_in) > 1) {
ErrorF("[dix] the server does not handle valuator masks with "
"keyboard events. This is a bug. You may fix it.\n");
}
num_events = 1;
events =
UpdateFromMaster(events, pDev, DEVCHANGE_KEYBOARD_EVENT, &num_events);
/* Handle core repeating, via press/release/press/release. */
if (type == KeyPress && key_is_down(pDev, key_code, KEY_POSTED)) {
/* If autorepeating is disabled either globally or just for that key,
* or we have a modifier, don't generate a repeat event. */
if (!pDev->kbdfeed->ctrl.autoRepeat ||
!key_autorepeats(pDev, key_code) ||
pDev->key->xkbInfo->desc->map->modmap[key_code])
return 0;
}
ms = GetTimeInMillis();
raw = &events->raw_event;
events++;
num_events++;
valuator_mask_copy(&mask, mask_in);
init_raw(pDev, raw, ms, type, key_code);
set_raw_valuators(raw, &mask, raw->valuators.data_raw);
clipValuators(pDev, &mask);
set_raw_valuators(raw, &mask, raw->valuators.data);
event = &events->device_event;
init_device_event(event, pDev, ms);
event->detail.key = key_code;
if (type == KeyPress) {
event->type = ET_KeyPress;
set_key_down(pDev, key_code, KEY_POSTED);
}
else if (type == KeyRelease) {
event->type = ET_KeyRelease;
set_key_up(pDev, key_code, KEY_POSTED);
}
clipValuators(pDev, &mask);
set_valuators(pDev, event, &mask);
if (!IsFloating(pDev)) {
DeviceIntPtr master = GetMaster(pDev, MASTER_POINTER);
event_set_root_coordinates(event,
master->last.valuators[0],
master->last.valuators[1]);
}
return num_events;
}
/**
* Initialize an event array large enough for num_events arrays.
* This event list is to be passed into GetPointerEvents() and
* GetKeyboardEvents().
*
* @param num_events Number of elements in list.
*/
InternalEvent *
InitEventList(int num_events)
{
InternalEvent *events = calloc(num_events, sizeof(InternalEvent));
return events;
}
/**
* Free an event list.
*
* @param list The list to be freed.
* @param num_events Number of elements in list.
*/
void
FreeEventList(InternalEvent *list, int num_events)
{
free(list);
}
/**
* Transform vector x/y according to matrix m and drop the rounded coords
* back into x/y.
*/
static void
transform(struct pixman_f_transform *m, double *x, double *y)
{
struct pixman_f_vector p = {.v = {*x, *y, 1} };
pixman_f_transform_point(m, &p);
*x = p.v[0];
*y = p.v[1];
}
/**
* Apply the device's transformation matrix to the valuator mask and replace
* the scaled values in mask. This transformation only applies to valuators
* 0 and 1, others will be untouched.
*
* @param dev The device the valuators came from
* @param[in,out] mask The valuator mask.
*/
static void
transformAbsolute(DeviceIntPtr dev, ValuatorMask *mask)
{
double x, y, ox, oy;
int has_x, has_y;
has_x = valuator_mask_fetch_double(mask, 0, &ox);
has_y = valuator_mask_fetch_double(mask, 1, &oy);
if (!has_x && !has_y)
return;
if (!has_x || !has_y) {
struct pixman_f_transform invert;
/* undo transformation from last event */
ox = dev->last.valuators[0];
oy = dev->last.valuators[1];
pixman_f_transform_invert(&invert, &dev->transform);
transform(&invert, &ox, &oy);
x = ox;
y = oy;
}
if (valuator_mask_isset(mask, 0))
ox = x = valuator_mask_get_double(mask, 0);
if (valuator_mask_isset(mask, 1))
oy = y = valuator_mask_get_double(mask, 1);
transform(&dev->transform, &x, &y);
if (valuator_mask_isset(mask, 0) || ox != x)
valuator_mask_set_double(mask, 0, x);
if (valuator_mask_isset(mask, 1) || oy != y)
valuator_mask_set_double(mask, 1, y);
}
static void
storeLastValuators(DeviceIntPtr dev, ValuatorMask *mask,
int xaxis, int yaxis, double devx, double devy)
{
int i;
/* store desktop-wide in last.valuators */
if (valuator_mask_isset(mask, xaxis))
dev->last.valuators[0] = devx;
if (valuator_mask_isset(mask, yaxis))
dev->last.valuators[1] = devy;
for (i = 0; i < valuator_mask_size(mask); i++) {
if (i == xaxis || i == yaxis)
continue;
if (valuator_mask_isset(mask, i))
dev->last.valuators[i] = valuator_mask_get_double(mask, i);
}
}
/**
* Generate internal events representing this pointer event and enqueue them
* on the event queue.
*
* This function is not reentrant. Disable signals before calling.
*
* @param device The device to generate the event for
* @param type Event type, one of ButtonPress, ButtonRelease, MotionNotify
* @param buttons Button number of the buttons modified. Must be 0 for
* MotionNotify
* @param flags Event modification flags
* @param mask Valuator mask for valuators present for this event.
*/
void
QueuePointerEvents(DeviceIntPtr device, int type,
int buttons, int flags, const ValuatorMask *mask)
{
int nevents;
nevents =
GetPointerEvents(InputEventList, device, type, buttons, flags, mask);
queueEventList(device, InputEventList, nevents);
}
/**
* Helper function for GetPointerEvents, which only generates motion and
* raw motion events for the slave device: does not update the master device.
*
* Should not be called by anyone other than GetPointerEvents.
*
* We use several different coordinate systems and need to switch between
* the three in fill_pointer_events, positionSprite and
* miPointerSetPosition. "desktop" refers to the width/height of all
* screenInfo.screens[n]->width/height added up. "screen" is ScreenRec, not
* output.
*
* Coordinate systems:
* - relative events have a mask_in in relative coordinates, mapped to
* pixels. These events are mapped to the current position±delta.
* - absolute events have a mask_in in absolute device coordinates in
* device-specific range. This range is mapped to the desktop.
* - POINTER_SCREEN absolute events (x86WarpCursor) are in screen-relative
* screen coordinate range.
* - rootx/rooty in events must be be relative to the current screen's
* origin (screen coordinate system)
* - XI2 valuators must be relative to the current screen's origin. On
* the protocol the device min/max range maps to the current screen.
*
* For screen switching we need to get the desktop coordinates for each
* event, then map that to the respective position on each screen and
* position the cursor there.
* The device's last.valuator[] stores the last position in desktop-wide
* coordinates (in device range for slave devices, desktop range for master
* devices).
*
* screen-relative device coordinates requires scaling: A device coordinate
* x/y of range [n..m] that maps to positions Sx/Sy on Screen S must be
* rescaled to match Sx/Sy for [n..m]. In the simplest example, x of (m/2-1)
* is the last coordinate on the first screen and must be rescaled for the
* event to be m. XI2 clients that do their own coordinate mapping would
* otherwise interpret the position of the device elsewere to the cursor.
*
* @return the number of events written into events.
*/
static int
fill_pointer_events(InternalEvent *events, DeviceIntPtr pDev, int type,
int buttons, CARD32 ms, int flags,
const ValuatorMask *mask_in)
{
int num_events = 1;
DeviceEvent *event;
RawDeviceEvent *raw;
double screenx = 0.0, screeny = 0.0; /* desktop coordinate system */
double devx = 0.0, devy = 0.0; /* desktop-wide in device coords */
ValuatorMask mask;
ScreenPtr scr;
switch (type) {
case MotionNotify:
if (!pDev->valuator) {
ErrorF("[dix] motion events from device %d without valuators\n",
pDev->id);
return 0;
}
if (!mask_in || valuator_mask_num_valuators(mask_in) <= 0)
return 0;
break;
case ButtonPress:
case ButtonRelease:
if (!pDev->button || !buttons)
return 0;
if (mask_in && valuator_mask_size(mask_in) > 0 && !pDev->valuator) {
ErrorF
("[dix] button event with valuator from device %d without valuators\n",
pDev->id);
return 0;
}
break;
default:
return 0;
}
valuator_mask_copy(&mask, mask_in);
if ((flags & POINTER_NORAW) == 0) {
raw = &events->raw_event;
events++;
num_events++;
init_raw(pDev, raw, ms, type, buttons);
set_raw_valuators(raw, &mask, raw->valuators.data_raw);
}
/* valuators are in driver-native format (rel or abs) */
if (flags & POINTER_ABSOLUTE) {
if (flags & POINTER_SCREEN) /* valuators are in screen coords */
scale_from_screen(pDev, &mask);
transformAbsolute(pDev, &mask);
clipAbsolute(pDev, &mask);
if ((flags & POINTER_NORAW) == 0)
set_raw_valuators(raw, &mask, raw->valuators.data);
}
else {
if (flags & POINTER_ACCELERATE)
accelPointer(pDev, &mask, ms);
if ((flags & POINTER_NORAW) == 0)
set_raw_valuators(raw, &mask, raw->valuators.data);
moveRelative(pDev, &mask);
}
/* valuators are in device coordinate system in absolute coordinates */
scale_to_desktop(pDev, &mask, &devx, &devy, &screenx, &screeny);
scr = positionSprite(pDev, (flags & POINTER_ABSOLUTE) ? Absolute : Relative,
&mask, &devx, &devy, &screenx, &screeny);
/* screenx, screeny are in desktop coordinates,
mask is in device coordinates per-screen (the event data)
devx/devy is in device coordinate desktop-wide */
updateHistory(pDev, &mask, ms);
clipValuators(pDev, &mask);
storeLastValuators(pDev, &mask, 0, 1, devx, devy);
/* Update the MD's co-ordinates, which are always in desktop space. */
if (!IsMaster(pDev) && !IsFloating(pDev)) {
DeviceIntPtr master = GetMaster(pDev, MASTER_POINTER);
master->last.valuators[0] = screenx;
master->last.valuators[1] = screeny;
}
event = &events->device_event;
init_device_event(event, pDev, ms);
if (type == MotionNotify) {
event->type = ET_Motion;
event->detail.button = 0;
}
else {
if (type == ButtonPress) {
event->type = ET_ButtonPress;
set_button_down(pDev, buttons, BUTTON_POSTED);
}
else if (type == ButtonRelease) {
event->type = ET_ButtonRelease;
set_button_up(pDev, buttons, BUTTON_POSTED);
}
event->detail.button = buttons;
}
/* root_x and root_y must be in per-screen co-ordinates */
event_set_root_coordinates(event, screenx - scr->x, screeny - scr->y);
if (flags & POINTER_EMULATED) {
raw->flags = XIPointerEmulated;
event->flags = XIPointerEmulated;
}
set_valuators(pDev, event, &mask);
return num_events;
}
/**
* Generate events for each scroll axis that changed between before/after
* for the device.
*
* @param events The pointer to the event list to fill the events
* @param dev The device to generate the events for
* @param type The real type of the event
* @param axis The axis number to generate events for
* @param mask State before this event in absolute coords
* @param[in,out] last Last scroll state posted in absolute coords (modified
* in-place)
* @param ms Current time in ms
* @param max_events Max number of events to be generated
* @return The number of events generated
*/
static int
emulate_scroll_button_events(InternalEvent *events,
DeviceIntPtr dev,
int type,
int axis,
const ValuatorMask *mask,
ValuatorMask *last, CARD32 ms, int max_events)
{
AxisInfoPtr ax;
double delta;
double incr;
int num_events = 0;
double total;
int b;
int flags = 0;
if (dev->valuator->axes[axis].scroll.type == SCROLL_TYPE_NONE)
return 0;
if (!valuator_mask_isset(mask, axis))
return 0;
ax = &dev->valuator->axes[axis];
incr = ax->scroll.increment;
if (type != ButtonPress && type != ButtonRelease)
flags |= POINTER_EMULATED;
if (!valuator_mask_isset(last, axis))
valuator_mask_set_double(last, axis, 0);
delta =
valuator_mask_get_double(mask, axis) - valuator_mask_get_double(last,
axis);
total = delta;
b = (ax->scroll.type == SCROLL_TYPE_VERTICAL) ? 5 : 7;
if ((incr > 0 && delta < 0) || (incr < 0 && delta > 0))
b--; /* we're scrolling up or left → button 4 or 6 */
while (fabs(delta) >= fabs(incr)) {
int nev_tmp;
if (delta > 0)
delta -= fabs(incr);
else if (delta < 0)
delta += fabs(incr);
/* fill_pointer_events() generates four events: one normal and one raw
* event for button press and button release.
* We may get a bigger scroll delta than we can generate events
* for. In that case, we keep decreasing delta, but skip events.
*/
if (num_events + 4 < max_events) {
if (type != ButtonRelease) {
nev_tmp = fill_pointer_events(events, dev, ButtonPress, b, ms,
flags, NULL);
events += nev_tmp;
num_events += nev_tmp;
}
if (type != ButtonPress) {
nev_tmp = fill_pointer_events(events, dev, ButtonRelease, b, ms,
flags, NULL);
events += nev_tmp;
num_events += nev_tmp;
}
}
}
/* We emulated, update last.scroll */
if (total != delta) {
total -= delta;
valuator_mask_set_double(last, axis,
valuator_mask_get_double(last, axis) + total);
}
return num_events;
}
/**
* Generate a complete series of InternalEvents (filled into the EventList)
* representing pointer motion, or button presses. If the device is a slave
* device, also potentially generate a DeviceClassesChangedEvent to update
* the master device.
*
* 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 InitEventList() and GetMaximumEventsNum(), and for freeing it.
*
* In the generated events rootX/Y will be in absolute screen coords and
* the valuator information in the absolute or relative device coords.
*
* last.valuators[x] of the device is always in absolute device coords.
* last.valuators[x] of the master device is in absolute screen coords.
*
* master->last.valuators[x] for x > 2 is undefined.
*/
int
GetPointerEvents(InternalEvent *events, DeviceIntPtr pDev, int type,
int buttons, int flags, const ValuatorMask *mask_in)
{
CARD32 ms = GetTimeInMillis();
int num_events = 0, nev_tmp;
ValuatorMask mask;
ValuatorMask scroll;
int i;
int realtype = type;
/* refuse events from disabled devices */
if (!pDev->enabled)
return 0;
if (!miPointerGetScreen(pDev))
return 0;
events = UpdateFromMaster(events, pDev, DEVCHANGE_POINTER_EVENT,
&num_events);
valuator_mask_copy(&mask, mask_in);
/* Turn a scroll button press into a smooth-scrolling event if
* necessary. This only needs to cater for the XIScrollFlagPreferred
* axis (if more than one scrolling axis is present) */
if (type == ButtonPress) {
double adj;
int axis;
int h_scroll_axis = -1;
int v_scroll_axis = -1;
if (pDev->valuator) {
h_scroll_axis = pDev->valuator->h_scroll_axis;
v_scroll_axis = pDev->valuator->v_scroll_axis;
}
/* Up is negative on valuators, down positive */
switch (buttons) {
case 4:
adj = -1.0;
axis = v_scroll_axis;
break;
case 5:
adj = 1.0;
axis = v_scroll_axis;
break;
case 6:
adj = -1.0;
axis = h_scroll_axis;
break;
case 7:
adj = 1.0;
axis = h_scroll_axis;
break;
default:
adj = 0.0;
axis = -1;
break;
}
if (adj != 0.0 && axis != -1) {
adj *= pDev->valuator->axes[axis].scroll.increment;
add_to_scroll_valuator(pDev, &mask, axis, adj);
type = MotionNotify;
buttons = 0;
flags |= POINTER_EMULATED;
}
}
/* First fill out the original event set, with smooth-scrolling axes. */
nev_tmp = fill_pointer_events(events, pDev, type, buttons, ms, flags,
&mask);
events += nev_tmp;
num_events += nev_tmp;
valuator_mask_zero(&scroll);
/* Now turn the smooth-scrolling axes back into emulated button presses
* for legacy clients, based on the integer delta between before and now */
for (i = 0; i < valuator_mask_size(&mask); i++) {
if ( !pDev->valuator || (i >= pDev->valuator->numAxes))
break;
if (!valuator_mask_isset(&mask, i))
continue;
valuator_mask_set_double(&scroll, i, pDev->last.valuators[i]);
nev_tmp =
emulate_scroll_button_events(events, pDev, realtype, i, &scroll,
pDev->last.scroll, ms,
GetMaximumEventsNum() - num_events);
events += nev_tmp;
num_events += nev_tmp;
}
return num_events;
}
/**
* Generate internal events representing this proximity event and enqueue
* them on the event queue.
*
* This function is not reentrant. Disable signals before calling.
*
* @param device The device to generate the event for
* @param type Event type, one of ProximityIn or ProximityOut
* @param keycode Key code of the pressed/released key
* @param mask Valuator mask for valuators present for this event.
*
*/
void
QueueProximityEvents(DeviceIntPtr device, int type, const ValuatorMask *mask)
{
int nevents;
nevents = GetProximityEvents(InputEventList, device, type, mask);
queueEventList(device, InputEventList, nevents);
}
/**
* Generate ProximityIn/ProximityOut InternalEvents, accompanied by
* valuators.
*
* The DDX is responsible for allocating the events in the first place via
* InitEventList(), and for freeing it.
*
* @return the number of events written into events.
*/
int
GetProximityEvents(InternalEvent *events, DeviceIntPtr pDev, int type,
const ValuatorMask *mask_in)
{
int num_events = 1, i;
DeviceEvent *event;
ValuatorMask mask;
/* refuse events from disabled devices */
if (!pDev->enabled)
return 0;
/* Sanity checks. */
if ((type != ProximityIn && type != ProximityOut) || !mask_in)
return 0;
if (!pDev->valuator || !pDev->proximity)
return 0;
valuator_mask_copy(&mask, mask_in);
/* ignore relative axes for proximity. */
for (i = 0; i < valuator_mask_size(&mask); i++) {
if (valuator_mask_isset(&mask, i) &&
valuator_get_mode(pDev, i) == Relative)
valuator_mask_unset(&mask, i);
}
/* FIXME: posting proximity events with relative valuators only results
* in an empty event, EventToXI() will fail to convert → no event sent
* to client. */
events =
UpdateFromMaster(events, pDev, DEVCHANGE_POINTER_EVENT, &num_events);
event = &events->device_event;
init_device_event(event, pDev, GetTimeInMillis());
event->type = (type == ProximityIn) ? ET_ProximityIn : ET_ProximityOut;
clipValuators(pDev, &mask);
set_valuators(pDev, event, &mask);
return num_events;
}
int
GetTouchOwnershipEvents(InternalEvent *events, DeviceIntPtr pDev,
TouchPointInfoPtr ti, uint8_t reason, XID resource,
uint32_t flags)
{
TouchClassPtr t = pDev->touch;
TouchOwnershipEvent *event;
CARD32 ms = GetTimeInMillis();
if (!pDev->enabled || !t || !ti)
return 0;
event = &events->touch_ownership_event;
init_touch_ownership(pDev, event, ms);
event->touchid = ti->client_id;
event->sourceid = ti->sourceid;
event->resource = resource;
event->flags = flags;
event->reason = reason;
return 1;
}
/**
* Generate internal events representing this touch event and enqueue them
* on the event queue.
*
* This function is not reentrant. Disable signals before calling.
*
* @param device The device to generate the event for
* @param type Event type, one of XI_TouchBegin, XI_TouchUpdate, XI_TouchEnd
* @param touchid Touch point ID
* @param flags Event modification flags
* @param mask Valuator mask for valuators present for this event.
*/
void
QueueTouchEvents(DeviceIntPtr device, int type,
uint32_t ddx_touchid, int flags, const ValuatorMask *mask)
{
int nevents;
nevents =
GetTouchEvents(InputEventList, device, ddx_touchid, type, flags, mask);
queueEventList(device, InputEventList, nevents);
}
/**
* Get events for a touch. Generates a TouchBegin event if end is not set and
* the touch id is not active. Generates a TouchUpdate event if end is not set
* and the touch id is active. Generates a TouchEnd event if end is set and the
* touch id is active.
*
* 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.
*
* @param[out] events The list of events generated
* @param dev The device to generate the events for
* @param ddx_touchid The touch ID as assigned by the DDX
* @param type XI_TouchBegin, XI_TouchUpdate or XI_TouchEnd
* @param flags Event flags
* @param mask_in Valuator information for this event
*/
int
GetTouchEvents(InternalEvent *events, DeviceIntPtr dev, uint32_t ddx_touchid,
uint16_t type, uint32_t flags, const ValuatorMask *mask_in)
{
ScreenPtr scr = dev->spriteInfo->sprite->hotPhys.pScreen;
TouchClassPtr t = dev->touch;
ValuatorClassPtr v = dev->valuator;
DeviceEvent *event;
CARD32 ms = GetTimeInMillis();
ValuatorMask mask;
double screenx = 0.0, screeny = 0.0; /* desktop coordinate system */
double devx = 0.0, devy = 0.0; /* desktop-wide in device coords */
int i;
int num_events = 0;
RawDeviceEvent *raw;
union touch {
TouchPointInfoPtr dix_ti;
DDXTouchPointInfoPtr ti;
} touchpoint;
int need_rawevent = TRUE;
Bool emulate_pointer = FALSE;
int client_id = 0;
if (!dev->enabled || !t || !v)
return 0;
/* Find and/or create the DDX touch info */
if (flags & TOUCH_CLIENT_ID) { /* A DIX-submitted TouchEnd */
touchpoint.dix_ti = TouchFindByClientID(dev, ddx_touchid);
BUG_WARN(!touchpoint.dix_ti);
if (!touchpoint.dix_ti)
return 0;
if (!mask_in ||
!valuator_mask_isset(mask_in, 0) ||
!valuator_mask_isset(mask_in, 1)) {
ErrorF
("[dix] dix-submitted events must have x/y valuator information.\n");
return 0;
}
need_rawevent = FALSE;
client_id = touchpoint.dix_ti->client_id;
}
else { /* a DDX-submitted touch */
touchpoint.ti =
TouchFindByDDXID(dev, ddx_touchid, (type == XI_TouchBegin));
if (!touchpoint.ti) {
ErrorF("[dix] %s: unable to %s touch point %x\n", dev->name,
type == XI_TouchBegin ? "begin" : "find", ddx_touchid);
return 0;
}
client_id = touchpoint.ti->client_id;
}
if (!(flags & TOUCH_CLIENT_ID))
emulate_pointer = touchpoint.ti->emulate_pointer;
else
emulate_pointer = ! !(flags & TOUCH_POINTER_EMULATED);
if (!IsMaster(dev))
events =
UpdateFromMaster(events, dev, DEVCHANGE_POINTER_EVENT, &num_events);
valuator_mask_copy(&mask, mask_in);
if (need_rawevent) {
raw = &events->raw_event;
events++;
num_events++;
init_raw(dev, raw, ms, type, client_id);
set_raw_valuators(raw, &mask, raw->valuators.data_raw);
}
event = &events->device_event;
num_events++;
init_event(dev, event, ms);
/* if submitted for master device, get the sourceid from there */
if (flags & TOUCH_CLIENT_ID) {
event->sourceid = touchpoint.dix_ti->sourceid;
/* TOUCH_CLIENT_ID implies norawevent */
}
switch (type) {
case XI_TouchBegin:
event->type = ET_TouchBegin;
/* If we're starting a touch, we must have x & y co-ordinates. */
if (!mask_in ||
!valuator_mask_isset(mask_in, 0) ||
!valuator_mask_isset(mask_in, 1)) {
ErrorF("%s: Attempted to start touch without x/y (driver bug)\n",
dev->name);
return 0;
}
break;
case XI_TouchUpdate:
event->type = ET_TouchUpdate;
if (!mask_in || valuator_mask_num_valuators(mask_in) <= 0) {
ErrorF("%s: TouchUpdate with no valuators? Driver bug\n",
dev->name);
}
break;
case XI_TouchEnd:
event->type = ET_TouchEnd;
/* We can end the DDX touch here, since we don't use the active
* field below */
if (!(flags & TOUCH_CLIENT_ID))
TouchEndDDXTouch(dev, touchpoint.ti);
break;
default:
return 0;
}
if (t->mode == XIDirectTouch && !(flags & TOUCH_CLIENT_ID)) {
if (!valuator_mask_isset(&mask, 0))
valuator_mask_set_double(&mask, 0,
valuator_mask_get_double(touchpoint.ti->
valuators, 0));
if (!valuator_mask_isset(&mask, 1))
valuator_mask_set_double(&mask, 1,
valuator_mask_get_double(touchpoint.ti->
valuators, 1));
}
/* Get our screen event co-ordinates (root_x/root_y/event_x/event_y):
* these come from the touchpoint in Absolute mode, or the sprite in
* Relative. */
if (t->mode == XIDirectTouch) {
transformAbsolute(dev, &mask);
if (!(flags & TOUCH_CLIENT_ID)) {
for (i = 0; i < valuator_mask_size(&mask); i++) {
double val;
if (valuator_mask_fetch_double(&mask, i, &val))
valuator_mask_set_double(touchpoint.ti->valuators, i, val);
}
}
clipAbsolute(dev, &mask);
}
else {
screenx = dev->spriteInfo->sprite->hotPhys.x;
screeny = dev->spriteInfo->sprite->hotPhys.y;
}
if (need_rawevent)
set_raw_valuators(raw, &mask, raw->valuators.data);
/* Indirect device touch coordinates are not used for cursor positioning.
* They are merely informational, and are provided in device coordinates.
* The device sprite is used for positioning instead, and it is already
* scaled. */
if (t->mode == XIDirectTouch)
scr = scale_to_desktop(dev, &mask, &devx, &devy, &screenx, &screeny);
if (emulate_pointer)
scr = positionSprite(dev, Absolute, &mask,
&devx, &devy, &screenx, &screeny);
/* see fill_pointer_events for coordinate systems */
if (emulate_pointer)
updateHistory(dev, &mask, ms);
clipValuators(dev, &mask);
if (emulate_pointer)
storeLastValuators(dev, &mask, 0, 1, devx, devy);
event->root = scr->root->drawable.id;
event_set_root_coordinates(event, screenx, screeny);
event->touchid = client_id;
event->flags = flags;
if (emulate_pointer) {
event->flags |= TOUCH_POINTER_EMULATED;
event->detail.button = 1;
}
set_valuators(dev, event, &mask);
for (i = 0; i < v->numAxes; i++) {
if (valuator_mask_isset(&mask, i))
v->axisVal[i] = valuator_mask_get(&mask, i);
}
return num_events;
}
/**
* 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(DeviceIntPtr pDev,
int x, int y, int screen, unsigned long time)
{
DeviceEvent ev;
#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 += screenInfo.screens[0]->x - screenInfo.screens[screen]->x;
y += screenInfo.screens[0]->y - screenInfo.screens[screen]->y;
}
#endif
memset(&ev, 0, sizeof(DeviceEvent));
init_device_event(&ev, pDev, time);
ev.root_x = x;
ev.root_y = y;
ev.type = ET_Motion;
ev.time = time;
/* FIXME: MD/SD considerations? */
(*pDev->public.processInputProc) ((InternalEvent *) &ev, pDev);
}
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