86303a338a
No special memory handling is used to give drivers the maximum flexibility with the data. Drivers should be able to call realloc on the product string if needed and perform similar operations. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Dan Nicholson <dbn.lists@gmail.com> Signed-off-by: Keith Packard <keithp@keithp.com>
413 lines
11 KiB
C
413 lines
11 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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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 = calloc(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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/**
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* Duplicate the InputAttributes in the most obvious way.
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* No special memory handling is used to give drivers the maximum
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* flexibility with the data. Drivers should be able to call realloc on the
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* product string if needed and perform similar operations.
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*/
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InputAttributes*
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DuplicateInputAttributes(InputAttributes *attrs)
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{
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InputAttributes *new_attr;
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int ntags = 0;
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char **tags, **new_tags;
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if (!attrs)
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return NULL;
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if (!(new_attr = calloc(1, sizeof(InputAttributes))))
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goto unwind;
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if (attrs->product && !(new_attr->product = strdup(attrs->product)))
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goto unwind;
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if (attrs->vendor && !(new_attr->vendor = strdup(attrs->vendor)))
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goto unwind;
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if (attrs->device && !(new_attr->device = strdup(attrs->device)))
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goto unwind;
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new_attr->flags = attrs->flags;
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if ((tags = attrs->tags))
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{
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while(*tags++)
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ntags++;
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new_attr->tags = calloc(ntags + 1, sizeof(char*));
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if (!new_attr->tags)
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goto unwind;
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tags = attrs->tags;
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new_tags = new_attr->tags;
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while(*tags)
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{
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*new_tags = strdup(*tags);
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if (!*new_tags)
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goto unwind;
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tags++;
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new_tags++;
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}
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}
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return new_attr;
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unwind:
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FreeInputAttributes(new_attr);
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return NULL;
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}
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void
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FreeInputAttributes(InputAttributes *attrs)
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{
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char **tags;
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if (!attrs)
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return;
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free(attrs->product);
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free(attrs->vendor);
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free(attrs->device);
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if ((tags = attrs->tags))
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while(*tags)
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free(*tags++);
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free(attrs->tags);
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free(attrs);
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}
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