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bc701a14292da5abfb601e3a040651a74f46df8f
xserver_xsdl/dix/getevents.c
Daniel Stone bc701a1429 dix/getevents: cosmetic cleanups, remove keymap copy from GKVE 
Remove keymap copy from GetKeyboardValuatorEvents, as
SwitchCoreKeyboard now takes care of this for us.
Remove unused variable and function prototype.
Update comments to be as informative as possible.
2006-10-23 00:08:32 +03:00

549 lines
18 KiB
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/*
* Copyright © 2006 Nokia Corporation
*
* 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>
#include "misc.h"
#include "resource.h"
#define NEED_EVENTS
#define NEED_REPLIES
#include <X11/Xproto.h>
#include "inputstr.h"
#include "scrnintstr.h"
#include "cursorstr.h"
#include "dixstruct.h"
#include "globals.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 XACE
#include "xace.h"
#endif
#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. */
#define MAX_VALUATOR_EVENTS 6
/**
* 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;
}
/**
* 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 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, ms = 0, i = 0;
int final_valuator = first_valuator + num_valuators;
KeySym sym = pDev->key->curKeySyms.map[key_code *
pDev->key->curKeySyms.mapWidth];
deviceKeyButtonPointer *kbp = NULL;
deviceValuator *xv = 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,
* 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;
if (num_valuators) {
kbp->deviceid |= MORE_EVENTS;
for (i = first_valuator; i < final_valuator; i += 6) {
xv = (deviceValuator *) ++events;
xv->type = DeviceValuator;
xv->first_valuator = i;
xv->num_valuators = num_valuators;
xv->deviceid = kbp->deviceid;
switch (num_valuators - first_valuator) {
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 (pDev->coreEvents) {
events++;
events->u.keyButtonPointer.time = ms;
events->u.u.type = type;
events->u.u.detail = key_code;
}
return numEvents;
}
/* 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);
}
}
}
}
/**
* 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, ms = 0, final_valuator = 0, i = 0;
deviceKeyButtonPointer *kbp = NULL;
deviceValuator *xv = NULL;
AxisInfoPtr axes = NULL;
Bool sendValuators = (type == MotionNotify || flags & POINTER_ABSOLUTE);
DeviceIntPtr cp = inputInfo.pointer;
int x = 0, y = 0;
if (type != MotionNotify && type != ButtonPress && type != ButtonRelease)
return 0;
if (!pDev->button || (pDev->coreEvents && (!cp->button || !cp->valuator)))
return 0;
/* You fail. */
if (first_valuator < 0)
return 0;
if (pDev->coreEvents)
num_events = 2;
else
num_events = 1;
/* Do we need to send a DeviceValuator event? */
if ((num_valuators + first_valuator) >= 2 && sendValuators) {
if (((num_valuators / 6) + 1) > MAX_VALUATOR_EVENTS)
num_valuators = MAX_VALUATOR_EVENTS;
num_events += (num_valuators / 6) + 1;
}
else if (type == MotionNotify && num_valuators <= 0) {
return 0;
}
final_valuator = num_valuators + first_valuator;
ms = GetTimeInMillis();
kbp = (deviceKeyButtonPointer *) events;
kbp->time = ms;
kbp->deviceid = pDev->id;
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)
x = 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;
}
}
axes = pDev->valuator->axes;
if (x < axes->min_value)
x = axes->min_value;
if (axes->max_value > 0 && x > axes->max_value)
x = axes->max_value;
axes++;
if (y < axes->min_value)
y = axes->min_value;
if (axes->max_value > 0 && y > axes->max_value)
y = axes->max_value;
/* 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);
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;
if (final_valuator > 2 && sendValuators) {
kbp->deviceid |= MORE_EVENTS;
for (i = first_valuator; i < final_valuator; i += 6) {
xv = (deviceValuator *) ++events;
xv->type = DeviceValuator;
xv->first_valuator = i;
xv->num_valuators = num_valuators;
xv->deviceid = kbp->deviceid;
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:
/* x and y may have been accelerated. */
if (i == 0)
xv->valuator1 = kbp->root_y;
else
xv->valuator1 = valuators[i + 1];
case 1:
/* x and y may have been accelerated. */
if (i == 0)
xv->valuator0 = kbp->root_x;
else
xv->valuator0 = valuators[i];
}
}
}
if (pDev->coreEvents) {
events++;
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;
}
/**
* 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;
}
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