335 lines
9.7 KiB
C
335 lines
9.7 KiB
C
/*
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* Copyright © 2008 Daniel Stone
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Author: Daniel Stone <daniel@fooishbar.org>
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include "dix-config.h"
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#endif
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#include "exevents.h"
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#include "exglobals.h"
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#include "misc.h"
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#include "input.h"
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#include "inputstr.h"
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#include "xace.h"
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#include "xkbsrv.h"
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#include "xkbstr.h"
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/* Check if a button map change is okay with the device.
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* Returns -1 for BadValue, as it collides with MappingBusy. */
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static int
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check_butmap_change(DeviceIntPtr dev, CARD8 *map, int len, CARD32 *errval_out,
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ClientPtr client)
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{
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int i, ret;
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if (!dev || !dev->button)
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{
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client->errorValue = (dev) ? dev->id : 0;
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return BadDevice;
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}
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ret = XaceHook(XACE_DEVICE_ACCESS, client, dev, DixManageAccess);
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if (ret != Success)
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{
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client->errorValue = dev->id;
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return ret;
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}
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for (i = 0; i < len; i++) {
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if (dev->button->map[i + 1] != map[i] && dev->button->down[i + 1])
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return MappingBusy;
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}
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return Success;
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}
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static void
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do_butmap_change(DeviceIntPtr dev, CARD8 *map, int len, ClientPtr client)
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{
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int i;
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xEvent core_mn;
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deviceMappingNotify xi_mn;
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/* The map in ButtonClassRec refers to button numbers, whereas the
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* protocol is zero-indexed. Sigh. */
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memcpy(&(dev->button->map[1]), map, len);
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core_mn.u.u.type = MappingNotify;
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core_mn.u.mappingNotify.request = MappingPointer;
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/* 0 is the server client. */
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for (i = 1; i < currentMaxClients; i++) {
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/* Don't send irrelevant events to naïve clients. */
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if (!clients[i] || clients[i]->clientState != ClientStateRunning)
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continue;
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if (!XIShouldNotify(clients[i], dev))
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continue;
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core_mn.u.u.sequenceNumber = clients[i]->sequence;
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WriteEventsToClient(clients[i], 1, &core_mn);
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}
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xi_mn.type = DeviceMappingNotify;
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xi_mn.request = MappingPointer;
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xi_mn.deviceid = dev->id;
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xi_mn.time = GetTimeInMillis();
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SendEventToAllWindows(dev, DeviceMappingNotifyMask, (xEvent *) &xi_mn, 1);
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}
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/*
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* Does what it says on the box, both for core and Xi.
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*
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* Faithfully reports any errors encountered while trying to apply the map
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* to the requested device, faithfully ignores any errors encountered while
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* trying to apply the map to its master/slaves.
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*/
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int
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ApplyPointerMapping(DeviceIntPtr dev, CARD8 *map, int len, ClientPtr client)
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{
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int ret;
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/* If we can't perform the change on the requested device, bail out. */
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ret = check_butmap_change(dev, map, len, &client->errorValue, client);
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if (ret != Success)
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return ret;
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do_butmap_change(dev, map, len, client);
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return Success;
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}
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/* Check if a modifier map change is okay with the device.
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* Returns -1 for BadValue, as it collides with MappingBusy; this particular
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* caveat can be removed with LegalModifier, as we have no other reason to
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* set MappingFailed. Sigh. */
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static int
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check_modmap_change(ClientPtr client, DeviceIntPtr dev, KeyCode *modmap)
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{
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int ret, i;
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XkbDescPtr xkb;
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ret = XaceHook(XACE_DEVICE_ACCESS, client, dev, DixManageAccess);
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if (ret != Success)
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return ret;
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if (!dev->key)
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return BadMatch;
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xkb = dev->key->xkbInfo->desc;
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for (i = 0; i < MAP_LENGTH; i++) {
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if (!modmap[i])
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continue;
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/* Check that all the new modifiers fall within the advertised
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* keycode range. */
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if (i < xkb->min_key_code || i > xkb->max_key_code) {
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client->errorValue = i;
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return -1;
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}
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/* Make sure the mapping is okay with the DDX. */
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if (!LegalModifier(i, dev)) {
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client->errorValue = i;
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return MappingFailed;
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}
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/* None of the new modifiers may be down while we change the
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* map. */
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if (key_is_down(dev, i, KEY_POSTED | KEY_PROCESSED)) {
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client->errorValue = i;
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return MappingBusy;
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}
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}
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/* None of the old modifiers may be down while we change the map,
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* either. */
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for (i = xkb->min_key_code; i < xkb->max_key_code; i++) {
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if (!xkb->map->modmap[i])
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continue;
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if (key_is_down(dev, i, KEY_POSTED | KEY_PROCESSED)) {
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client->errorValue = i;
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return MappingBusy;
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}
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}
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return Success;
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}
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static int
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check_modmap_change_slave(ClientPtr client, DeviceIntPtr master,
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DeviceIntPtr slave, CARD8 *modmap)
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{
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XkbDescPtr master_xkb, slave_xkb;
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int i, j;
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if (!slave->key || !master->key)
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return 0;
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master_xkb = master->key->xkbInfo->desc;
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slave_xkb = slave->key->xkbInfo->desc;
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/* Ignore devices with a clearly different keymap. */
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if (slave_xkb->min_key_code != master_xkb->min_key_code ||
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slave_xkb->max_key_code != master_xkb->max_key_code)
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return 0;
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for (i = 0; i < MAP_LENGTH; i++) {
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if (!modmap[i])
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continue;
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/* If we have different symbols for any modifier on an
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* extended keyboard, ignore the whole remap request. */
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for (j = 0;
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j < XkbKeyNumSyms(slave_xkb, i) &&
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j < XkbKeyNumSyms(master_xkb, i);
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j++)
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if (XkbKeySymsPtr(slave_xkb, i)[j] != XkbKeySymsPtr(master_xkb, i)[j])
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return 0;
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}
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if (check_modmap_change(client, slave, modmap) != Success)
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return 0;
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return 1;
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}
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/* Actually change the modifier map, and send notifications. Cannot fail. */
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static void
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do_modmap_change(ClientPtr client, DeviceIntPtr dev, CARD8 *modmap)
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{
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XkbApplyMappingChange(dev, NULL, 0, 0, modmap, serverClient);
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}
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/* Rebuild modmap (key -> mod) from map (mod -> key). */
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static int build_modmap_from_modkeymap(CARD8 *modmap, KeyCode *modkeymap,
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int max_keys_per_mod)
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{
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int i, len = max_keys_per_mod * 8;
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memset(modmap, 0, MAP_LENGTH);
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for (i = 0; i < len; i++) {
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if (!modkeymap[i])
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continue;
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if (modkeymap[i] >= MAP_LENGTH)
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return BadValue;
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if (modmap[modkeymap[i]])
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return BadValue;
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modmap[modkeymap[i]] = 1 << (i / max_keys_per_mod);
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}
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return Success;
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}
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int
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change_modmap(ClientPtr client, DeviceIntPtr dev, KeyCode *modkeymap,
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int max_keys_per_mod)
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{
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int ret;
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CARD8 modmap[MAP_LENGTH];
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DeviceIntPtr tmp;
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ret = build_modmap_from_modkeymap(modmap, modkeymap, max_keys_per_mod);
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if (ret != Success)
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return ret;
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/* If we can't perform the change on the requested device, bail out. */
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ret = check_modmap_change(client, dev, modmap);
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if (ret != Success)
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return ret;
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do_modmap_change(client, dev, modmap);
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/* Change any attached masters/slaves. */
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if (IsMaster(dev)) {
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for (tmp = inputInfo.devices; tmp; tmp = tmp->next) {
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if (!IsMaster(tmp) && tmp->u.master == dev)
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if (check_modmap_change_slave(client, dev, tmp, modmap))
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do_modmap_change(client, tmp, modmap);
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}
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}
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else if (dev->u.master && dev->u.master->u.lastSlave == dev) {
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/* If this fails, expect the results to be weird. */
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if (check_modmap_change(client, dev->u.master, modmap))
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do_modmap_change(client, dev->u.master, modmap);
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}
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return Success;
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}
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int generate_modkeymap(ClientPtr client, DeviceIntPtr dev,
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KeyCode **modkeymap_out, int *max_keys_per_mod_out)
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{
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CARD8 keys_per_mod[8];
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int max_keys_per_mod;
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KeyCode *modkeymap;
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int i, j, ret;
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ret = XaceHook(XACE_DEVICE_ACCESS, client, dev, DixGetAttrAccess);
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if (ret != Success)
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return ret;
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if (!dev->key)
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return BadMatch;
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/* Count the number of keys per modifier to determine how wide we
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* should make the map. */
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max_keys_per_mod = 0;
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for (i = 0; i < 8; i++)
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keys_per_mod[i] = 0;
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for (i = 8; i < MAP_LENGTH; i++) {
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for (j = 0; j < 8; j++) {
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if (dev->key->xkbInfo->desc->map->modmap[i] & (1 << j)) {
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if (++keys_per_mod[j] > max_keys_per_mod)
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max_keys_per_mod = keys_per_mod[j];
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}
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}
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}
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modkeymap = xcalloc(max_keys_per_mod * 8, sizeof(KeyCode));
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if (!modkeymap)
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return BadAlloc;
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for (i = 0; i < 8; i++)
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keys_per_mod[i] = 0;
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for (i = 8; i < MAP_LENGTH; i++) {
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for (j = 0; j < 8; j++) {
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if (dev->key->xkbInfo->desc->map->modmap[i] & (1 << j)) {
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modkeymap[(j * max_keys_per_mod) + keys_per_mod[j]] = i;
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keys_per_mod[j]++;
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}
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}
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}
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*max_keys_per_mod_out = max_keys_per_mod;
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*modkeymap_out = modkeymap;
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return Success;
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}
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