Xi/xiquerypointer.c

   1 /*
   2  * Copyright 2007-2008 Peter Hutterer
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Author: Peter Hutterer, University of South Australia, NICTA
  24  */
  25
  26 /***********************************************************************
  27  *
  28  * Request to query the pointer location of an extension input device.
  29  *
  30  */
  31
  32 #include <dix-config.h>
  33
  34 #include <X11/X.h>              /* for inputstr.h    */
  35 #include <X11/Xproto.h>         /* Request macro     */
  36 #include <X11/extensions/XI.h>
  37 #include <X11/extensions/XI2proto.h>
  38
  39 #include "dix/dix_priv.h"
  40 #include "dix/eventconvert.h"
  41 #include "dix/exevents_priv.h"
  42 #include "dix/input_priv.h"
  43
  44 #include "inputstr.h"           /* DeviceIntPtr      */
  45 #include "windowstr.h"          /* window structure  */
  46 #include "extnsionst.h"
  47 #include "exglobals.h"
  48 #include "scrnintstr.h"
  49 #include "xkbsrv.h"
  50
  51 #ifdef PANORAMIX
  52 #include "panoramiXsrv.h"
  53 #endif
  54
  55 #include "inpututils.h"
  56 #include "xiquerypointer.h"
  57
  58 /***********************************************************************
  59  *
  60  * This procedure allows a client to query the pointer of a device.
  61  *
  62  */
  63
  64 int _X_COLD
  65 SProcXIQueryPointer(ClientPtr client)
  66 {
  67     REQUEST(xXIQueryPointerReq);
  68     REQUEST_SIZE_MATCH(xXIQueryPointerReq);
  69
  70     swaps(&stuff->length);
  71     swaps(&stuff->deviceid);
  72     swapl(&stuff->win);
  73     return (ProcXIQueryPointer(client));
  74 }
  75
  76 int
  77 ProcXIQueryPointer(ClientPtr client)
  78 {
  79     int rc;
  80     xXIQueryPointerReply rep;
  81     DeviceIntPtr pDev, kbd;
  82     WindowPtr pWin, t;
  83     SpritePtr pSprite;
  84     XkbStatePtr state;
  85     char *buttons = NULL;
  86     int buttons_size = 0;       /* size of buttons array */
  87     XIClientPtr xi_client;
  88     Bool have_xi22 = FALSE;
  89
  90     REQUEST(xXIQueryPointerReq);
  91     REQUEST_SIZE_MATCH(xXIQueryPointerReq);
  92
  93     /* Check if client is compliant with XInput 2.2 or later. Earlier clients
  94      * do not know about touches, so we must report emulated button presses. 2.2
  95      * and later clients are aware of touches, so we don't include emulated
  96      * button presses in the reply. */
  97     xi_client = dixLookupPrivate(&client->devPrivates, XIClientPrivateKey);
  98     if (version_compare(xi_client->major_version,
  99                         xi_client->minor_version, 2, 2) >= 0)
 100         have_xi22 = TRUE;
 101
 102     rc = dixLookupDevice(&pDev, stuff->deviceid, client, DixReadAccess);
 103     if (rc != Success) {
 104         client->errorValue = stuff->deviceid;
 105         return rc;
 106     }
 107
 108     if (pDev->valuator == NULL || IsKeyboardDevice(pDev) || (!IsMaster(pDev) && !IsFloating(pDev))) {   /* no attached devices */
 109         client->errorValue = stuff->deviceid;
 110         return BadDevice;
 111     }
 112
 113     rc = dixLookupWindow(&pWin, stuff->win, client, DixGetAttrAccess);
 114     if (rc != Success) {
 115         client->errorValue = stuff->win;
 116         return rc;
 117     }
 118
 119     if (pDev->valuator->motionHintWindow)
 120         MaybeStopHint(pDev, client);
 121
 122     if (IsMaster(pDev))
 123         kbd = GetMaster(pDev, MASTER_KEYBOARD);
 124     else
 125         kbd = (pDev->key) ? pDev : NULL;
 126
 127     pSprite = pDev->spriteInfo->sprite;
 128
 129     rep = (xXIQueryPointerReply) {
 130         .repType = X_Reply,
 131         .RepType = X_XIQueryPointer,
 132         .sequenceNumber = client->sequence,
 133         .length = 6,
 134         .root = (GetCurrentRootWindow(pDev))->drawable.id,
 135         .root_x = double_to_fp1616(pSprite->hot.x),
 136         .root_y = double_to_fp1616(pSprite->hot.y),
 137         .child = None
 138     };
 139
 140     if (kbd) {
 141         state = &kbd->key->xkbInfo->state;
 142         rep.mods.base_mods = state->base_mods;
 143         rep.mods.latched_mods = state->latched_mods;
 144         rep.mods.locked_mods = state->locked_mods;
 145
 146         rep.group.base_group = state->base_group;
 147         rep.group.latched_group = state->latched_group;
 148         rep.group.locked_group = state->locked_group;
 149     }
 150
 151     if (pDev->button) {
 152         int i;
 153
 154         rep.buttons_len = bytes_to_int32(bits_to_bytes(256)); /* button map up to 255 */
 155         rep.length += rep.buttons_len;
 156         buttons = calloc(rep.buttons_len, 4);
 157         if (!buttons)
 158             return BadAlloc;
 159         buttons_size = rep.buttons_len * 4;
 160
 161         for (i = 1; i < pDev->button->numButtons; i++)
 162             if (BitIsOn(pDev->button->down, i))
 163                 SetBit(buttons, pDev->button->map[i]);
 164
 165         if (!have_xi22 && pDev->touch && pDev->touch->buttonsDown > 0)
 166             SetBit(buttons, pDev->button->map[1]);
 167     }
 168     else
 169         rep.buttons_len = 0;
 170
 171     if (pSprite->hot.pScreen == pWin->drawable.pScreen) {
 172         rep.same_screen = xTrue;
 173         rep.win_x = double_to_fp1616(pSprite->hot.x - pWin->drawable.x);
 174         rep.win_y = double_to_fp1616(pSprite->hot.y - pWin->drawable.y);
 175         for (t = pSprite->win; t; t = t->parent)
 176             if (t->parent == pWin) {
 177                 rep.child = t->drawable.id;
 178                 break;
 179             }
 180     }
 181     else {
 182         rep.same_screen = xFalse;
 183         rep.win_x = 0;
 184         rep.win_y = 0;
 185     }
 186
 187 #ifdef PANORAMIX
 188     if (!noPanoramiXExtension) {
 189         rep.root_x += double_to_fp1616(screenInfo.screens[0]->x);
 190         rep.root_y += double_to_fp1616(screenInfo.screens[0]->y);
 191         if (stuff->win == rep.root) {
 192             rep.win_x += double_to_fp1616(screenInfo.screens[0]->x);
 193             rep.win_y += double_to_fp1616(screenInfo.screens[0]->y);
 194         }
 195     }
 196 #endif
 197
 198     WriteReplyToClient(client, sizeof(xXIQueryPointerReply), &rep);
 199     if (buttons)
 200         WriteToClient(client, buttons_size, buttons);
 201
 202     free(buttons);
 203
 204     return Success;
 205 }
 206
 207 /***********************************************************************
 208  *
 209  * This procedure writes the reply for the XIQueryPointer function,
 210  * if the client and server have a different byte ordering.
 211  *
 212  */
 213
 214 void
 215 SRepXIQueryPointer(ClientPtr client, int size, xXIQueryPointerReply * rep)
 216 {
 217     swaps(&rep->sequenceNumber);
 218     swapl(&rep->length);
 219     swapl(&rep->root);
 220     swapl(&rep->child);
 221     swapl(&rep->root_x);
 222     swapl(&rep->root_y);
 223     swapl(&rep->win_x);
 224     swapl(&rep->win_y);
 225     swaps(&rep->buttons_len);
 226
 227     WriteToClient(client, size, rep);
 228 }