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IABSD.fr/xenocara/xserver/dix/inpututils.c
matthieu
- xserver/dix/inpututils.c
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/* * Copyright © 2008 Daniel Stone * * 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. * * Author: Daniel Stone <daniel@fooishbar.org> */ #ifdef HAVE_DIX_CONFIG_H #include "dix-config.h" #endif #include "exevents.h" #include "exglobals.h" #include "misc.h" #include "input.h" #include "inputstr.h" #include "xace.h" #include "xkbsrv.h" #include "xkbstr.h" /* Check if a button map change is okay with the device. * Returns -1 for BadValue, as it collides with MappingBusy. */ static int check_butmap_change(DeviceIntPtr dev, CARD8 *map, int len, CARD32 *errval_out, ClientPtr client) { int i, ret; if (!dev || !dev->button) { client->errorValue = (dev) ? dev->id : 0; return BadDevice; } ret = XaceHook(XACE_DEVICE_ACCESS, client, dev, DixManageAccess); if (ret != Success) { client->errorValue = dev->id; return ret; } for (i = 0; i < len; i++) { if (dev->button->map[i + 1] != map[i] && dev->button->down[i + 1]) return MappingBusy; } return Success; } static void do_butmap_change(DeviceIntPtr dev, CARD8 *map, int len, ClientPtr client) { int i; xEvent core_mn; deviceMappingNotify xi_mn; /* The map in ButtonClassRec refers to button numbers, whereas the * protocol is zero-indexed. Sigh. */ memcpy(&(dev->button->map[1]), map, len); core_mn.u.u.type = MappingNotify; core_mn.u.mappingNotify.request = MappingPointer; /* 0 is the server client. */ for (i = 1; i < currentMaxClients; i++) { /* Don't send irrelevant events to naïve clients. */ if (!clients[i] || clients[i]->clientState != ClientStateRunning) continue; if (!XIShouldNotify(clients[i], dev)) continue; core_mn.u.u.sequenceNumber = clients[i]->sequence; WriteEventsToClient(clients[i], 1, &core_mn); } xi_mn.type = DeviceMappingNotify; xi_mn.request = MappingPointer; xi_mn.deviceid = dev->id; xi_mn.time = GetTimeInMillis(); SendEventToAllWindows(dev, DeviceMappingNotifyMask, (xEvent *) &xi_mn, 1); } /* * Does what it says on the box, both for core and Xi. * * Faithfully reports any errors encountered while trying to apply the map * to the requested device, faithfully ignores any errors encountered while * trying to apply the map to its master/slaves. */ int ApplyPointerMapping(DeviceIntPtr dev, CARD8 *map, int len, ClientPtr client) { int ret; /* If we can't perform the change on the requested device, bail out. */ ret = check_butmap_change(dev, map, len, &client->errorValue, client); if (ret != Success) return ret; do_butmap_change(dev, map, len, client); return Success; } /* Check if a modifier map change is okay with the device. * Returns -1 for BadValue, as it collides with MappingBusy; this particular * caveat can be removed with LegalModifier, as we have no other reason to * set MappingFailed. Sigh. */ static int check_modmap_change(ClientPtr client, DeviceIntPtr dev, KeyCode *modmap) { int ret, i; XkbDescPtr xkb; ret = XaceHook(XACE_DEVICE_ACCESS, client, dev, DixManageAccess); if (ret != Success) return ret; if (!dev->key) return BadMatch; xkb = dev->key->xkbInfo->desc; for (i = 0; i < MAP_LENGTH; i++) { if (!modmap[i]) continue; /* Check that all the new modifiers fall within the advertised * keycode range. */ if (i < xkb->min_key_code || i > xkb->max_key_code) { client->errorValue = i; return -1; } /* Make sure the mapping is okay with the DDX. */ if (!LegalModifier(i, dev)) { client->errorValue = i; return MappingFailed; } /* None of the new modifiers may be down while we change the * map. */ if (key_is_down(dev, i, KEY_POSTED | KEY_PROCESSED)) { client->errorValue = i; return MappingBusy; } } /* None of the old modifiers may be down while we change the map, * either. */ for (i = xkb->min_key_code; i < xkb->max_key_code; i++) { if (!xkb->map->modmap[i]) continue; if (key_is_down(dev, i, KEY_POSTED | KEY_PROCESSED)) { client->errorValue = i; return MappingBusy; } } return Success; } static int check_modmap_change_slave(ClientPtr client, DeviceIntPtr master, DeviceIntPtr slave, CARD8 *modmap) { XkbDescPtr master_xkb, slave_xkb; int i, j; if (!slave->key || !master->key) return 0; master_xkb = master->key->xkbInfo->desc; slave_xkb = slave->key->xkbInfo->desc; /* Ignore devices with a clearly different keymap. */ if (slave_xkb->min_key_code != master_xkb->min_key_code || slave_xkb->max_key_code != master_xkb->max_key_code) return 0; for (i = 0; i < MAP_LENGTH; i++) { if (!modmap[i]) continue; /* If we have different symbols for any modifier on an * extended keyboard, ignore the whole remap request. */ for (j = 0; j < XkbKeyNumSyms(slave_xkb, i) && j < XkbKeyNumSyms(master_xkb, i); j++) if (XkbKeySymsPtr(slave_xkb, i)[j] != XkbKeySymsPtr(master_xkb, i)[j]) return 0; } if (check_modmap_change(client, slave, modmap) != Success) return 0; return 1; } /* Actually change the modifier map, and send notifications. Cannot fail. */ static void do_modmap_change(ClientPtr client, DeviceIntPtr dev, CARD8 *modmap) { XkbApplyMappingChange(dev, NULL, 0, 0, modmap, serverClient); } /* Rebuild modmap (key -> mod) from map (mod -> key). */ static int build_modmap_from_modkeymap(CARD8 *modmap, KeyCode *modkeymap, int max_keys_per_mod) { int i, len = max_keys_per_mod * 8; memset(modmap, 0, MAP_LENGTH); for (i = 0; i < len; i++) { if (!modkeymap[i]) continue; if (modkeymap[i] >= MAP_LENGTH) return BadValue; if (modmap[modkeymap[i]]) return BadValue; modmap[modkeymap[i]] = 1 << (i / max_keys_per_mod); } return Success; } int change_modmap(ClientPtr client, DeviceIntPtr dev, KeyCode *modkeymap, int max_keys_per_mod) { int ret; CARD8 modmap[MAP_LENGTH]; DeviceIntPtr tmp; ret = build_modmap_from_modkeymap(modmap, modkeymap, max_keys_per_mod); if (ret != Success) return ret; /* If we can't perform the change on the requested device, bail out. */ ret = check_modmap_change(client, dev, modmap); if (ret != Success) return ret; do_modmap_change(client, dev, modmap); /* Change any attached masters/slaves. */ if (IsMaster(dev)) { for (tmp = inputInfo.devices; tmp; tmp = tmp->next) { if (!IsMaster(tmp) && tmp->u.master == dev) if (check_modmap_change_slave(client, dev, tmp, modmap)) do_modmap_change(client, tmp, modmap); } } else if (dev->u.master && dev->u.master->u.lastSlave == dev) { /* If this fails, expect the results to be weird. */ if (check_modmap_change(client, dev->u.master, modmap)) do_modmap_change(client, dev->u.master, modmap); } return Success; } int generate_modkeymap(ClientPtr client, DeviceIntPtr dev, KeyCode **modkeymap_out, int *max_keys_per_mod_out) { CARD8 keys_per_mod[8]; int max_keys_per_mod; KeyCode *modkeymap; int i, j, ret; ret = XaceHook(XACE_DEVICE_ACCESS, client, dev, DixGetAttrAccess); if (ret != Success) return ret; if (!dev->key) return BadMatch; /* Count the number of keys per modifier to determine how wide we * should make the map. */ max_keys_per_mod = 0; for (i = 0; i < 8; i++) keys_per_mod[i] = 0; for (i = 8; i < MAP_LENGTH; i++) { for (j = 0; j < 8; j++) { if (dev->key->xkbInfo->desc->map->modmap[i] & (1 << j)) { if (++keys_per_mod[j] > max_keys_per_mod) max_keys_per_mod = keys_per_mod[j]; } } } modkeymap = xcalloc(max_keys_per_mod * 8, sizeof(KeyCode)); if (!modkeymap) return BadAlloc; for (i = 0; i < 8; i++) keys_per_mod[i] = 0; for (i = 8; i < MAP_LENGTH; i++) { for (j = 0; j < 8; j++) { if (dev->key->xkbInfo->desc->map->modmap[i] & (1 << j)) { modkeymap[(j * max_keys_per_mod) + keys_per_mod[j]] = i; keys_per_mod[j]++; } } } *max_keys_per_mod_out = max_keys_per_mod; *modkeymap_out = modkeymap; return Success; }