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xserver-multidpi/dix/getevents.c

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/*
* Copyright © 2006 Nokia Corporation
* Copyright © 2006-2007 Daniel Stone
* Copyright © 2008 Red Hat, Inc.
*
* 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 "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 <X11/extensions/XKBproto.h>
#include "xkbsrv.h"
#ifdef PANORAMIX
#include "panoramiX.h"
#include "panoramiXsrv.h"
#endif
#include <X11/extensions/XI.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 container list for all input events generated by the
* DDX. The DDX is expected to call GetEventList() and then pass the list into
* Get{Pointer|Keyboard}Events.
*/
EventListPtr InputEventList = NULL;
int InputEventListLen = 0;
int
GetEventList(EventListPtr* list)
{
*list = InputEventList;
return InputEventListLen;
}
/**
* 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_raw(DeviceIntPtr dev, RawDeviceEvent *event, Time ms, int type, int detail)
{
memset(event, 0, sizeof(RawDeviceEvent));
event->header = ET_Internal;
event->length = sizeof(RawDeviceEvent);
event->type = ET_RawKeyPress - ET_KeyPress + type;
event->time = ms;
event->deviceid = dev->id;
event->sourceid = dev->id;
event->detail.button = detail;
}
static void
set_raw_valuators(RawDeviceEvent *event, ValuatorMask *mask, int32_t* 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(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(mask, i);
event->valuators.data_frac[i] =
dev->last.remainder[i] * (1 << 16) * (1 << 16);
}
else if (valuator_get_mode(dev, i) == Absolute)
event->valuators.data[i] = dev->valuator->axisVal[i];
}
}
void
CreateClassesChangedEvent(EventList* event,
DeviceIntPtr master,
DeviceIntPtr slave,
int type)
{
int i;
DeviceChangedEvent *dce;
CARD32 ms = GetTimeInMillis();
dce = (DeviceChangedEvent*)event->event;
memset(dce, 0, sizeof(DeviceChangedEvent));
dce->deviceid = slave->id;
dce->masterid = master->id;
dce->header = ET_Internal;
dce->length = sizeof(DeviceChangedEvent);
dce->type = ET_DeviceChanged;
dce->time = ms;
dce->flags = type;
dce->flags |= DEVCHANGE_SLAVE_SWITCH;
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;
}
}
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 int
rescaleValuatorAxis(int coord, float remainder, float *remainder_return, AxisInfoPtr from, AxisInfoPtr to,
int defmax)
{
int fmin = 0, tmin = 0, fmax = defmax, tmax = defmax, coord_return;
float value;
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) {
if (remainder_return)
*remainder_return = remainder;
return coord;
}
if(fmax == fmin) { /* avoid division by 0 */
if (remainder_return)
*remainder_return = 0.0;
return 0;
}
value = (coord + remainder - fmin) * (tmax - tmin) / (fmax - fmin) + tmin;
coord_return = lroundf(value);
if (remainder_return)
*remainder_return = value - coord_return;
return coord_return;
}
/**
* 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)
{
ScreenPtr scr = miPointerGetScreen(pDev);
int i;
DeviceIntPtr lastSlave;
/* master->last.valuators[0]/[1] is in screen 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], pDev->last.remainder[0],
&pDev->last.remainder[0], NULL, pDev->valuator->axes + 0, scr->width);
if(pDev->valuator->numAxes > 1)
pDev->last.valuators[1] = rescaleValuatorAxis(pDev->last.valuators[1], pDev->last.remainder[1],
&pDev->last.remainder[1], NULL, pDev->valuator->axes + 1, scr->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;
else
pDev->last.valuators[i] =
rescaleValuatorAxis(pDev->last.valuators[i],
pDev->last.remainder[i],
&pDev->last.remainder[i],
lastSlave->valuator->axes + i,
pDev->valuator->axes + i, 0);
}
}
}
/**
* 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;
int dflt;
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, 0.0, NULL, &from, to, 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, 0.0, NULL, &from, to, 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;
if (j == 0 && (to->max_value < to->min_value))
dflt = pScreen->width;
else if (j == 1 && (to->max_value < to->min_value))
dflt = pScreen->height;
else
dflt = 0;
/* scale from stored range into current range */
coord = rescaleValuatorAxis(coord, 0.0, NULL, &from, to, 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,
int *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++)
{
/* 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);
memcpy(buff, &valuators[i], 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++)
{
if (valuator_mask_size(mask) <= i || !valuator_mask_isset(mask, i))
{
buff += sizeof(INT32);
continue;
}
memcpy(buff, &valuators[i], 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
*/
return 3;
}
/**
* Clip an axis to its bounds, which are declared in the call to
* InitValuatorAxisClassStruct.
*/
static void
clipAxis(DeviceIntPtr pDev, int axisNum, int *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))
{
int val = valuator_mask_get(mask, i);
clipAxis(pDev, i, &val);
valuator_mask_set(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 list.
* @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.
*/
EventListPtr
UpdateFromMaster(EventListPtr 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);
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 which's pointer is to be moved.
* @param x Returns the x position of the pointer after the move.
* @param y Returns the y position of the pointer after the move.
* @param mask Bit mask of valid valuators.
* @param valuators Valuator data for each axis between @first and
* @first+@num.
*/
static void
moveAbsolute(DeviceIntPtr dev, int *x, int *y, ValuatorMask *mask)
{
int i;
if (valuator_mask_isset(mask, 0))
*x = valuator_mask_get(mask, 0);
else
*x = dev->last.valuators[0];
if (valuator_mask_isset(mask, 1))
*y = valuator_mask_get(mask, 1);
else
*y = dev->last.valuators[1];
clipAxis(dev, 0, x);
clipAxis(dev, 1, y);
for (i = 2; i < valuator_mask_size(mask); i++)
{
if (valuator_mask_isset(mask, i))
{
dev->last.valuators[i] = valuator_mask_get(mask, i);
clipAxis(dev, i, &dev->last.valuators[i]);
}
}
}
/**
* Move the device's pointer by the values given in @valuators.
*
* @param dev The device which's pointer is to be moved.
* @param x Returns the x position of the pointer after the move.
* @param y Returns the y position of the pointer after the move.
* @param mask Bit mask of valid valuators.
* @param valuators Valuator data for each axis between @first and
* @first+@num.
*/
static void
moveRelative(DeviceIntPtr dev, int *x, int *y, ValuatorMask *mask)
{
int i;
*x = dev->last.valuators[0];
*y = dev->last.valuators[1];
if (valuator_mask_isset(mask, 0))
*x += valuator_mask_get(mask, 0);
if (valuator_mask_isset(mask, 1))
*y += valuator_mask_get(mask, 1);
/* if attached, clip both x and y to the defined limits (usually
* co-ord space limit). If it is attached, we need x/y to go over the
* limits to be able to change screens. */
if (dev->valuator && (IsMaster(dev) || !IsFloating(dev))) {
if (valuator_get_mode(dev, 0) == Absolute)
clipAxis(dev, 0, x);
if (valuator_get_mode(dev, 1) == Absolute)
clipAxis(dev, 1, y);
}
/* calc other axes, clip, drop back into valuators */
for (i = 2; i < valuator_mask_size(mask); i++)
{
if (valuator_mask_isset(mask, i))
{
dev->last.valuators[i] += valuator_mask_get(mask, i);
if (valuator_get_mode(dev, i) == Absolute)
clipAxis(dev, i, &dev->last.valuators[i]);
valuator_mask_set(mask, i, dev->last.valuators[i]);
}
}
}
/**
* 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);
}
/**
* If we have HW cursors, this actually moves the visible sprite. If not, we
* just do all the screen crossing, etc.
*
* We scale from device to 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 whether
* it was relative or absolute movement that landed us at those coordinates.
*
* @param dev The device to be moved.
* @param mode Movement mode (Absolute or Relative)
* @param x Pointer to current x-axis value, may be modified.
* @param y Pointer to current y-axis value, may be modified.
* @param x_frac Fractional part of current x-axis value, may be modified.
* @param y_frac Fractional part of current y-axis value, may be modified.
* @param scr Screen the device's sprite is currently on.
* @param screenx Screen x coordinate the sprite is on after the update.
* @param screeny Screen y coordinate the sprite is on after the update.
* @param screenx_frac Fractional part of screen x coordinate, as above.
* @param screeny_frac Fractional part of screen y coordinate, as above.
*/
static void
positionSprite(DeviceIntPtr dev, int mode,
int *x, int *y, float x_frac, float y_frac,
ScreenPtr scr, int *screenx, int *screeny, float *screenx_frac, float *screeny_frac)
{
int old_screenx, old_screeny;
/* scale x&y to screen */
if (dev->valuator && dev->valuator->numAxes > 0) {
*screenx = rescaleValuatorAxis(*x, x_frac, screenx_frac,
dev->valuator->axes + 0, NULL, scr->width);
} else {
*screenx = dev->last.valuators[0];
*screenx_frac = dev->last.remainder[0];
}
if (dev->valuator && dev->valuator->numAxes > 1) {
*screeny = rescaleValuatorAxis(*y, y_frac, screeny_frac,
dev->valuator->axes + 1, NULL, scr->height);
} else {
*screeny = dev->last.valuators[1];
*screeny_frac = dev->last.remainder[1];
}
/* Hit the left screen edge? */
if (*screenx <= 0 && *screenx_frac < 0.0f)
{
*screenx_frac = 0.0f;
x_frac = 0.0f;
}
if (*screeny <= 0 && *screeny_frac < 0.0f)
{
*screeny_frac = 0.0f;
y_frac = 0.0f;
}
old_screenx = *screenx;
old_screeny = *screeny;
/* This takes care of crossing screens for us, as well as clipping
* to the current screen. */
miPointerSetPosition(dev, mode, screenx, screeny);
if(!IsMaster(dev) || !IsFloating(dev)) {
DeviceIntPtr master = GetMaster(dev, MASTER_POINTER);
master->last.valuators[0] = *screenx;
master->last.valuators[1] = *screeny;
master->last.remainder[0] = *screenx_frac;
master->last.remainder[1] = *screeny_frac;
}
if (dev->valuator)
{
/* Crossed screen? Scale back to device coordiantes */
if(*screenx != old_screenx)
{
scr = miPointerGetScreen(dev);
*x = rescaleValuatorAxis(*screenx, *screenx_frac, &x_frac, NULL,
dev->valuator->axes + 0, scr->width);
}
if(*screeny != old_screeny)
{
scr = miPointerGetScreen(dev);
*y = rescaleValuatorAxis(*screeny, *screeny_frac, &y_frac, NULL,
dev->valuator->axes + 1, scr->height);
}
}
/* dropy x/y (device coordinates) back into valuators for next event */
dev->last.valuators[0] = *x;
dev->last.valuators[1] = *y;
dev->last.remainder[0] = x_frac;
dev->last.remainder[1] = y_frac;
}
/**
* 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);
}
}
/**
* Returns a set of InternalEvents for KeyPress/KeyRelease, optionally
* also with valuator events.
*
* 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.
*/
int
GetKeyboardEvents(EventList *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;
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 = (RawDeviceEvent*)events->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 = (DeviceEvent*) events->event;
init_event(pDev, event, 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);
return num_events;
}
/**
* Initialize an event list and fill with 32 byte sized events.
* This event list is to be passed into GetPointerEvents() and
* GetKeyboardEvents().
*
* @param num_events Number of elements in list.
*/
EventListPtr
InitEventList(int num_events)
{
EventListPtr events;
int i;
events = (EventListPtr)calloc(num_events, sizeof(EventList));
if (!events)
return NULL;
for (i = 0; i < num_events; i++)
{
events[i].evlen = sizeof(InternalEvent);
events[i].event = calloc(1, sizeof(InternalEvent));
if (!events[i].event)
{
/* rollback */
while(i--)
free(events[i].event);
free(events);
events = NULL;
break;
}
}
return events;
}
/**
* Free an event list.
*
* @param list The list to be freed.
* @param num_events Number of elements in list.
*/
void
FreeEventList(EventListPtr list, int num_events)
{
if (!list)
return;
while(num_events--)
free(list[num_events].event);
free(list);
}
static void
transformAbsolute(DeviceIntPtr dev, ValuatorMask *mask)
{
struct pixman_f_vector p;
/* p' = M * p in homogeneous coordinates */
p.v[0] = (valuator_mask_isset(mask, 0) ? valuator_mask_get(mask, 0) :
dev->last.valuators[0]);
p.v[1] = (valuator_mask_isset(mask, 1) ? valuator_mask_get(mask, 1) :
dev->last.valuators[1]);
p.v[2] = 1.0;
pixman_f_transform_point(&dev->transform, &p);
if (lround(p.v[0]) != dev->last.valuators[0])
valuator_mask_set(mask, 0, lround(p.v[0]));
if (lround(p.v[1]) != dev->last.valuators[1])
valuator_mask_set(mask, 1, lround(p.v[1]));
}
/**
* Generate a series of InternalEvents (filled into the EventList)
* representing pointer motion, or button presses.
*
* 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(EventList *events, DeviceIntPtr pDev, int type, int buttons,
int flags, const ValuatorMask *mask_in) {
int num_events = 1;
CARD32 ms;
DeviceEvent *event;
RawDeviceEvent *raw;
int x = 0, y = 0, /* device coords */
cx, cy; /* only screen coordinates */
float x_frac = 0.0, y_frac = 0.0, cx_frac, cy_frac;
ScreenPtr scr = miPointerGetScreen(pDev);
ValuatorMask mask;
/* refuse events from disabled devices */
if (!pDev->enabled)
return 0;
if (!scr)
return 0;
switch (type)
{
case MotionNotify:
if (!mask_in || valuator_mask_num_valuators(mask_in) <= 0)
return 0;
break;
case ButtonPress:
case ButtonRelease:
if (!pDev->button || !buttons)
return 0;
break;
default:
return 0;
}
ms = GetTimeInMillis(); /* before pointer update to help precision */
events = UpdateFromMaster(events, pDev, DEVCHANGE_POINTER_EVENT, &num_events);
raw = (RawDeviceEvent*)events->event;
events++;
num_events++;
valuator_mask_copy(&mask, mask_in);
init_raw(pDev, raw, ms, type, buttons);
set_raw_valuators(raw, &mask, raw->valuators.data_raw);
if (flags & POINTER_ABSOLUTE)
{
if (flags & POINTER_SCREEN) /* valuators are in screen coords */
{
int scaled;
if (valuator_mask_isset(&mask, 0))
{
scaled = rescaleValuatorAxis(valuator_mask_get(&mask, 0),
0.0, &x_frac, NULL,
pDev->valuator->axes + 0,
scr->width);
valuator_mask_set(&mask, 0, scaled);
}
if (valuator_mask_isset(&mask, 1))
{
scaled = rescaleValuatorAxis(valuator_mask_get(&mask, 1),
0.0, &y_frac, NULL,
pDev->valuator->axes + 1,
scr->height);
valuator_mask_set(&mask, 1, scaled);
}
}
transformAbsolute(pDev, &mask);
moveAbsolute(pDev, &x, &y, &mask);
} else {
if (flags & POINTER_ACCELERATE) {
accelPointer(pDev, &mask, ms);
/* The pointer acceleration code modifies the fractional part
* in-place, so we need to extract this information first */
x_frac = pDev->last.remainder[0];
y_frac = pDev->last.remainder[1];
}
moveRelative(pDev, &x, &y, &mask);
}
set_raw_valuators(raw, &mask, raw->valuators.data);
positionSprite(pDev, (flags & POINTER_ABSOLUTE) ? Absolute : Relative,
&x, &y, x_frac, y_frac, scr, &cx, &cy, &cx_frac, &cy_frac);
updateHistory(pDev, &mask, ms);
/* Update the valuators with the true value sent to the client*/
if (valuator_mask_isset(&mask, 0))
valuator_mask_set(&mask, 0, x);
if (valuator_mask_isset(&mask, 1))
valuator_mask_set(&mask, 1, y);
clipValuators(pDev, &mask);
event = (DeviceEvent*) events->event;
init_event(pDev, event, 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;
}
event->root_x = cx; /* root_x/y always in screen coords */
event->root_y = cy;
event->root_x_frac = cx_frac;
event->root_y_frac = cy_frac;
set_valuators(pDev, event, &mask);
return num_events;
}
/**
* Generate ProximityIn/ProximityOut InternalEvents, 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.
*/
int
GetProximityEvents(EventList *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)
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 = (DeviceEvent *) events->event;
init_event(pDev, event, GetTimeInMillis());
event->type = (type == ProximityIn) ? ET_ProximityIn : ET_ProximityOut;
clipValuators(pDev, &mask);
set_valuators(pDev, event, &mask);
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_event(pDev, &ev, 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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