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xserver/hw/dmx/input/dmxbackend.c

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/*
* Copyright 2001-2003 Red Hat Inc., Durham, North Carolina.
*
* All Rights Reserved.
*
* 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 on 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
* NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
* 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:
* David H. Dawes <dawes@xfree86.org>
* Kevin E. Martin <kem@redhat.com>
* Rickard E. (Rik) Faith <faith@redhat.com>
*/
/** \file
* These routines support taking input from devices on the backend
* (output) displays. \see dmxcommon.c. */
#ifdef HAVE_DMX_CONFIG_H
#include <dmx-config.h>
#endif
#define DMX_BACKEND_DEBUG 0
#include "dmxinputinit.h"
#include "dmxbackend.h"
#include "dmxcommon.h"
#include "dmxconsole.h"
#include "dmxcursor.h"
#include "dmxprop.h"
#include "dmxsync.h"
#include "dmxcb.h" /* For dmxGlobalWidth and dmxGlobalHeight */
#include "dmxevents.h" /* For dmxGetGlobalPosition */
#include "ChkNotMaskEv.h"
#include "inputstr.h"
#include "input.h"
#include <X11/keysym.h>
#include "mipointer.h"
#include "scrnintstr.h"
#include "windowstr.h"
/* Private area for backend devices. */
typedef struct _myPrivate {
DMX_COMMON_PRIVATE;
int myScreen;
DMXScreenInfo *grabbedScreen;
int lastX, lastY;
int centerX, centerY;
int relative;
int newscreen;
int initialized;
DevicePtr mou, kbd;
int entered;
int offX, offY;
} myPrivate;
#if DMX_BACKEND_DEBUG
#define DMXDBG0(f) dmxLog(dmxDebug,f)
#define DMXDBG1(f,a) dmxLog(dmxDebug,f,a)
#define DMXDBG2(f,a,b) dmxLog(dmxDebug,f,a,b)
#define DMXDBG3(f,a,b,c) dmxLog(dmxDebug,f,a,b,c)
#define DMXDBG4(f,a,b,c,d) dmxLog(dmxDebug,f,a,b,c,d)
#define DMXDBG5(f,a,b,c,d,e) dmxLog(dmxDebug,f,a,b,c,d,e)
#define DMXDBG6(f,a,b,c,d,e,g) dmxLog(dmxDebug,f,a,b,c,d,e,g)
#define DMXDBG7(f,a,b,c,d,e,g,h) dmxLog(dmxDebug,f,a,b,c,d,e,g,h)
#define DMXDBG8(f,a,b,c,d,e,g,h,i) dmxLog(dmxDebug,f,a,b,c,d,e,g,h,i)
#define DMXDBG9(f,a,b,c,d,e,g,h,i,j) dmxLog(dmxDebug,f,a,b,c,d,e,g,h,i,j)
#else
#define DMXDBG0(f)
#define DMXDBG1(f,a)
#define DMXDBG2(f,a,b)
#define DMXDBG3(f,a,b,c)
#define DMXDBG4(f,a,b,c,d)
#define DMXDBG5(f,a,b,c,d,e)
#define DMXDBG6(f,a,b,c,d,e,g)
#define DMXDBG7(f,a,b,c,d,e,g,h)
#define DMXDBG8(f,a,b,c,d,e,g,h,i)
#define DMXDBG9(f,a,b,c,d,e,g,h,i,j)
#endif
/** Create and return a private data structure. */
void *
dmxBackendCreatePrivate(DeviceIntPtr pDevice)
{
GETDMXLOCALFROMPDEVICE;
myPrivate *priv = calloc(1, sizeof(*priv));
priv->dmxLocal = dmxLocal;
return priv;
}
/** Destroy the private data structure. No checking is performed to
* verify that the structure was actually created by
* #dmxBackendCreatePrivate. */
void
dmxBackendDestroyPrivate(void *private)
{
free(private);
}
static void *
dmxBackendTestScreen(DMXScreenInfo * dmxScreen, void *closure)
{
long target = (long) closure;
if (dmxScreen->index == target)
return dmxScreen;
return NULL;
}
/* Return non-zero if screen and priv->myScreen are on the same physical
* backend display (1 if they are the same screen, 2 if they are
* different screens). Since this is a common operation, the results
* are cached. The cache is invalidated if \a priv is NULL (this should
* be done with each server generation and reconfiguration). */
static int
dmxBackendSameDisplay(myPrivate * priv, long screen)
{
static myPrivate *oldpriv = NULL;
static int oldscreen = -1;
static int retcode = 0;
if (priv == oldpriv && screen == oldscreen)
return retcode;
if (!priv) { /* Invalidate cache */
oldpriv = NULL;
oldscreen = -1;
retcode = 0;
return 0;
}
if (screen == priv->myScreen)
retcode = 1;
else if (screen < 0 || screen >= dmxNumScreens)
retcode = 0;
else if (dmxPropertyIterate(priv->be,
dmxBackendTestScreen, (void *) screen))
retcode = 2;
else
retcode = 0;
oldpriv = priv;
oldscreen = screen;
return retcode;
}
static void *
dmxBackendTestEvents(DMXScreenInfo * dmxScreen, void *closure)
{
XEvent *X = (XEvent *) closure;
if (XCheckNotMaskEvent(dmxScreen->beDisplay, ExposureMask, X))
return dmxScreen;
return NULL;
}
static void *
dmxBackendTestMotionEvent(DMXScreenInfo * dmxScreen, void *closure)
{
XEvent *X = (XEvent *) closure;
if (XCheckTypedEvent(dmxScreen->beDisplay, MotionNotify, X))
return dmxScreen;
return NULL;
}
static DMXScreenInfo *
dmxBackendGetEvent(myPrivate * priv, XEvent * X)
{
DMXScreenInfo *dmxScreen;
if ((dmxScreen = dmxPropertyIterate(priv->be, dmxBackendTestEvents, X)))
return dmxScreen;
return NULL;
}
static DMXScreenInfo *
dmxBackendPendingMotionEvent(myPrivate * priv, int save)
{
DMXScreenInfo *dmxScreen;
XEvent N;
if ((dmxScreen = dmxPropertyIterate(priv->be,
dmxBackendTestMotionEvent, &N))) {
if (save)
XPutBackEvent(dmxScreen->beDisplay, &N);
return dmxScreen;
}
return NULL;
}
static void *
dmxBackendTestWindow(DMXScreenInfo * dmxScreen, void *closure)
{
Window win = (Window) (long) closure;
if (dmxScreen->scrnWin == win)
return dmxScreen;
return NULL;
}
static DMXScreenInfo *
dmxBackendFindWindow(myPrivate * priv, Window win)
{
return dmxPropertyIterate(priv->be, dmxBackendTestWindow,
(void *) (long) win);
}
/* If the cursor is over a set of overlapping screens and one of those
* screens takes backend input, then we want that particular screen to
* be current, not one of the other ones. */
static int
dmxBackendFindOverlapping(myPrivate * priv, int screen, int x, int y)
{
DMXScreenInfo *start = &dmxScreens[screen];
DMXScreenInfo *pt;
if (!start->over)
return screen;
for (pt = start->over; /* condition at end of loop */ ; pt = pt->over) {
if (pt->index == priv->myScreen
&& dmxOnScreen(x, y, &dmxScreens[pt->index]))
return pt->index;
if (pt == start)
break;
}
return screen;
}
/* Return non-zero if \a x and \a y are off \a screen. */
static int
dmxBackendOffscreen(int screen, int x, int y)
{
DMXScreenInfo *dmxScreen = &dmxScreens[screen];
return (!dmxOnScreen(x, y, dmxScreen));
}
/** This routine is called from #dmxCoreMotion for each motion
* event. \a x and \a y are global coordinants. */
void
dmxBackendUpdatePosition(void *private, int x, int y)
{
GETPRIVFROMPRIVATE;
int screen = miPointerGetScreen(inputInfo.pointer)->myNum;
DMXScreenInfo *dmxScreen = &dmxScreens[priv->myScreen];
int oldRelative = priv->relative;
int topscreen = dmxBackendFindOverlapping(priv, screen, x, y);
int same = dmxBackendSameDisplay(priv, topscreen);
int offscreen = dmxBackendOffscreen(priv->myScreen, x, y);
int offthis = dmxBackendOffscreen(screen, x, y);
DMXDBG9("dmxBackendUpdatePosition(%d,%d) my=%d mi=%d rel=%d"
" topscreen=%d same=%d offscreen=%d offthis=%d\n",
x, y, priv->myScreen, screen, priv->relative,
topscreen, same, offscreen, offthis);
if (offscreen) {
/* If the cursor is off the input screen, it should be moving
* relative unless it is visible on a screen of the same display
* (i.e., one that shares the mouse). */
if (same == 2 && !offthis) {
if (priv->relative) {
DMXDBG0(" Off screen, but not absolute\n");
priv->relative = 0;
}
}
else {
if (!priv->relative) {
DMXDBG0(" Off screen, but not relative\n");
priv->relative = 1;
}
}
}
else {
if (topscreen != screen) {
DMXDBG2(" Using screen %d instead of %d (from mi)\n",
topscreen, screen);
}
if (same) {
if (priv->relative) {
DMXDBG0(" On screen, but not absolute\n");
priv->relative = 0;
}
}
else {
if (!priv->relative) {
DMXDBG0(" Not on screen, but not relative\n");
priv->relative = 1;
}
}
}
if (oldRelative != priv->relative) {
DMXDBG2(" Do switch, relative=%d same=%d\n", priv->relative, same);
/* Discard all pre-switch events */
dmxSync(dmxScreen, TRUE);
while (dmxBackendPendingMotionEvent(priv, FALSE));
if (dmxInput->console && offscreen) {
/* Our special case is a console window and a backend window
* share a display. In this case, the cursor is either on
* the backend window (taking absolute input), or not (in
* which case the cursor needs to be in the console
* window). */
if (priv->grabbedScreen) {
DMXDBG2(" *** force ungrab on %s, display=%p\n",
priv->grabbedScreen->name,
priv->grabbedScreen->beDisplay);
XUngrabPointer(priv->grabbedScreen->beDisplay, CurrentTime);
dmxSync(priv->grabbedScreen, TRUE);
priv->grabbedScreen = NULL;
}
DMXDBG0(" Capturing console\n");
dmxConsoleCapture(dmxInput);
}
else {
priv->newscreen = 1;
if (priv->relative && !dmxInput->console) {
DMXDBG5(" Hide cursor; warp from %d,%d to %d,%d on %d\n",
priv->lastX, priv->lastY, priv->centerX, priv->centerY,
priv->myScreen);
dmxConsoleUncapture(dmxInput);
dmxHideCursor(dmxScreen);
priv->lastX = priv->centerX;
priv->lastY = priv->centerY;
XWarpPointer(priv->display, None, priv->window,
0, 0, 0, 0, priv->lastX, priv->lastY);
dmxSync(dmxScreen, TRUE);
}
else {
DMXDBG0(" Check cursor\n");
dmxCheckCursor();
}
}
}
}
/** Get events from the X queue on the backend servers and put the
* events into the DMX event queue. */
void
dmxBackendCollectEvents(DevicePtr pDev,
dmxMotionProcPtr motion,
dmxEnqueueProcPtr enqueue,
dmxCheckSpecialProcPtr checkspecial, DMXBlockType block)
{
GETPRIVFROMPDEV;
GETDMXINPUTFROMPRIV;
XEvent X;
DMXScreenInfo *dmxScreen;
int left = 0;
int entered = priv->entered;
int ignoreLeave = 0;
int v[2];
int retcode;
while ((dmxScreen = dmxBackendGetEvent(priv, &X))) {
switch (X.type) {
case EnterNotify:
dmxCommonSaveState(priv);
if (entered++)
continue;
priv->entered = 1;
ignoreLeave = 1;
DMXDBG5("dmxBackendCollectEvents: Enter %lu %d,%d; GRAB %s %p\n",
X.xcrossing.root, X.xcrossing.x, X.xcrossing.y,
dmxScreen->name, dmxScreen->beDisplay);
XRaiseWindow(dmxScreen->beDisplay, dmxScreen->scrnWin);
priv->grabbedScreen = dmxScreen;
if ((retcode = XGrabPointer(dmxScreen->beDisplay,
dmxScreen->scrnWin,
True, 0, GrabModeAsync,
GrabModeAsync, None, None,
CurrentTime))) {
dmxLog(dmxError,
"XGrabPointer failed during backend enter (%d)\n",
retcode);
}
break;
case LeaveNotify:
if (ignoreLeave) {
ignoreLeave = 0;
continue;
}
dmxCommonRestoreState(priv);
if (left++)
continue;
DMXDBG7("dmxBackendCollectEvents: Leave %lu %d,%d %d %d %s %s\n",
X.xcrossing.root, X.xcrossing.x, X.xcrossing.y,
X.xcrossing.detail, X.xcrossing.focus,
priv->grabbedScreen ? "UNGRAB" : "", dmxScreen->name);
if (priv->grabbedScreen) {
XUngrabPointer(priv->grabbedScreen->beDisplay, CurrentTime);
dmxSync(priv->grabbedScreen, TRUE);
priv->grabbedScreen = NULL;
}
break;
case MotionNotify:
DMXDBG8("dmxBackendCollectEvents: MotionNotify %d/%d"
" newscreen=%d: %d %d (e=%d; last=%d,%d)\n",
dmxScreen->index, priv->myScreen,
priv->newscreen,
X.xmotion.x, X.xmotion.y,
entered, priv->lastX, priv->lastY);
if (dmxBackendPendingMotionEvent(priv, TRUE))
continue;
if (!(dmxScreen = dmxBackendFindWindow(priv, X.xmotion.window)))
dmxLog(dmxFatal,
" Event on non-existant window %lu\n",
X.xmotion.window);
if (!priv->relative || dmxInput->console) {
int newX = X.xmotion.x - dmxScreen->rootX;
int newY = X.xmotion.y - dmxScreen->rootY;
if (!priv->newscreen) {
int width = dmxScreen->rootWidth;
int height = dmxScreen->rootHeight;
if (!newX)
newX = -1;
if (newX == width - 1)
newX = width;
if (!newY)
newY = -1;
if (newY == height - 1)
newY = height;
}
priv->newscreen = 0;
v[0] = dmxScreen->rootXOrigin + newX;
v[1] = dmxScreen->rootYOrigin + newY;
DMXDBG8(" Absolute move: %d,%d (r=%dx%d+%d+%d s=%dx%d)\n",
v[0], v[1],
priv->be->rootWidth, priv->be->rootHeight,
priv->be->rootX, priv->be->rootY,
priv->be->scrnWidth, priv->be->scrnHeight);
motion(priv->mou, v, 0, 2, DMX_ABSOLUTE, block);
priv->entered = 0;
}
else {
int newX = priv->lastX - X.xmotion.x;
int newY = priv->lastY - X.xmotion.y;
priv->lastX = X.xmotion.x;
priv->lastY = X.xmotion.y;
v[0] = newX;
v[1] = newY;
DMXDBG2(" Relative move: %d, %d\n", v[0], v[1]);
motion(priv->mou, v, 0, 2, DMX_RELATIVE, block);
}
if (entered && priv->relative) {
DMXDBG4(" **** Relative %d %d instead of absolute %d %d\n",
v[0], v[1],
(dmxScreen->rootXOrigin + X.xmotion.x
- dmxScreen->rootX),
(dmxScreen->rootYOrigin + X.xmotion.y
- dmxScreen->rootY));
}
break;
case KeyPress:
case KeyRelease:
enqueue(priv->kbd, X.type, X.xkey.keycode, 0, NULL, block);
break;
case ButtonPress:
case ButtonRelease:
/* fall-through */
default:
/* Pass the whole event here, because
* this may be an extension event. */
enqueue(priv->mou, X.type, X.xbutton.button, 0, &X, block);
break;
}
}
}
/** Called after input events are processed from the DMX queue. No
* event processing actually takes place here, but this is a convenient
* place to update the pointer. */
void
dmxBackendProcessInput(void *private)
{
GETPRIVFROMPRIVATE;
DMXDBG6("dmxBackendProcessInput: myScreen=%d relative=%d"
" last=%d,%d center=%d,%d\n",
priv->myScreen, priv->relative,
priv->lastX, priv->lastY, priv->centerX, priv->centerY);
if (priv->relative
&& !dmxInput->console
&& (priv->lastX != priv->centerX || priv->lastY != priv->centerY)) {
DMXDBG4(" warping pointer from last=%d,%d to center=%d,%d\n",
priv->lastX, priv->lastY, priv->centerX, priv->centerY);
priv->lastX = priv->centerX;
priv->lastY = priv->centerY;
XWarpPointer(priv->display, None, priv->window,
0, 0, 0, 0, priv->lastX, priv->lastY);
dmxSync(&dmxScreens[priv->myScreen], TRUE);
}
}
static void
dmxBackendComputeCenter(myPrivate * priv)
{
int centerX;
int centerY;
centerX = priv->be->rootWidth / 2 + priv->be->rootX;
centerY = priv->be->rootHeight / 2 + priv->be->rootY;
if (centerX > priv->be->rootWidth)
centerX = priv->be->rootWidth - 1;
if (centerY > priv->be->rootHeight)
centerY = priv->be->rootHeight - 1;
if (centerX < 1)
centerX = 1;
if (centerY < 1)
centerY = 1;
priv->centerX = centerX;
priv->centerY = centerY;
}
static DMXScreenInfo *
dmxBackendInitPrivate(DevicePtr pDev)
{
GETPRIVFROMPDEV;
DMXInputInfo *dmxInput = &dmxInputs[dmxLocal->inputIdx];
DMXScreenInfo *dmxScreen;
int i;
/* Fill in myPrivate */
for (i = 0, dmxScreen = &dmxScreens[0]; i < dmxNumScreens; i++, dmxScreen++) {
if (dmxPropertySameDisplay(dmxScreen, dmxInput->name)) {
priv->display = dmxScreen->beDisplay;
priv->window = dmxScreen->scrnWin;
priv->be = dmxScreen;
break;
}
}
if (i >= dmxNumScreens)
dmxLog(dmxFatal,
"%s is not an existing backend display - cannot initialize\n",
dmxInput->name);
return dmxScreen;
}
/** Re-initialized the backend device described by \a pDev (after a
* reconfig). */
void
dmxBackendLateReInit(DevicePtr pDev)
{
GETPRIVFROMPDEV;
int x, y;
dmxBackendSameDisplay(NULL, 0); /* Invalidate cache */
dmxBackendInitPrivate(pDev);
dmxBackendComputeCenter(priv);
dmxGetGlobalPosition(&x, &y);
dmxInvalidateGlobalPosition(); /* To force event processing */
dmxBackendUpdatePosition(priv, x, y);
}
/** Initialized the backend device described by \a pDev. */
void
dmxBackendInit(DevicePtr pDev)
{
GETPRIVFROMPDEV;
DMXScreenInfo *dmxScreen;
dmxBackendSameDisplay(NULL, 0); /* Invalidate cache */
if (dmxLocal->type == DMX_LOCAL_MOUSE)
priv->mou = pDev;
if (dmxLocal->type == DMX_LOCAL_KEYBOARD)
priv->kbd = pDev;
if (priv->initialized++)
return; /* Only do once for mouse/keyboard pair */
dmxScreen = dmxBackendInitPrivate(pDev);
/* Finish initialization using computed values or constants. */
dmxBackendComputeCenter(priv);
priv->eventMask = (EnterWindowMask | LeaveWindowMask);
priv->myScreen = dmxScreen->index;
priv->lastX = priv->centerX;
priv->lastY = priv->centerY;
priv->relative = 0;
priv->newscreen = 0;
}
/** Get information about the backend pointer (for initialization). */
void
dmxBackendMouGetInfo(DevicePtr pDev, DMXLocalInitInfoPtr info)
{
const DMXScreenInfo *dmxScreen = dmxBackendInitPrivate(pDev);
info->buttonClass = 1;
dmxCommonMouGetMap(pDev, info->map, &info->numButtons);
info->valuatorClass = 1;
info->numRelAxes = 2;
info->minval[0] = 0;
info->minval[1] = 0;
info->maxval[0] = dmxScreen->beWidth;
info->maxval[1] = dmxScreen->beHeight;
info->res[0] = 1;
info->minres[0] = 0;
info->maxres[0] = 1;
info->ptrFeedbackClass = 1;
}
/** Get information about the backend keyboard (for initialization). */
void
dmxBackendKbdGetInfo(DevicePtr pDev, DMXLocalInitInfoPtr info)
{
dmxCommonKbdGetInfo(pDev, info);
info->keyboard = 1;
info->keyClass = 1;
dmxCommonKbdGetMap(pDev, &info->keySyms, info->modMap);
info->freemap = 1;
info->focusClass = 1;
info->kbdFeedbackClass = 1;
}
/** Process #DMXFunctionType functions. The only function handled here
* is to acknowledge a pending server shutdown. */
int
dmxBackendFunctions(void *private, DMXFunctionType function)
{
switch (function) {
case DMX_FUNCTION_TERMINATE:
return 1;
default:
return 0;
}
}
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