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/*
* BRLTTY - A background process providing access to the console screen (when in
* text mode) for a blind person using a refreshable braille display.
*
* Copyright (C) 1995-2024 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU Lesser General Public License, as published by the Free Software
* Foundation; either version 2.1 of the License, or (at your option) any
* later version. Please see the file LICENSE-LGPL for details.
*
* Web Page: http://brltty.app/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include <string.h>
#include "log.h"
#include "learn.h"
#include "message.h"
#include "async_wait.h"
#include "cmd.h"
#include "cmd_queue.h"
#include "brl.h"
#include "brl_cmds.h"
#include "core.h"
typedef enum {
LMS_CONTINUE,
LMS_TIMEOUT,
LMS_EXIT,
LMS_ERROR
} LearnModeState;
typedef struct {
const char *mode;
LearnModeState state;
} LearnModeData;
ASYNC_CONDITION_TESTER(testEndLearnWait) {
LearnModeData *lmd = data;
return lmd->state != LMS_TIMEOUT;
}
static int
handleLearnModeCommands (int command, void *data) {
LearnModeData *lmd = data;
logMessage(LOG_DEBUG, "learn: command=%06X", command);
lmd->state = LMS_CONTINUE;
switch (command & BRL_MSK_CMD) {
case BRL_CMD_LEARN:
lmd->state = LMS_EXIT;
return 1;
case BRL_CMD_NOOP:
return 1;
default:
switch (command & BRL_MSK_BLK) {
case BRL_CMD_BLK(TOUCH_AT):
return 1;
default:
break;
}
break;
}
{
char buffer[0X100];
describeCommand(buffer, sizeof(buffer), command,
(CDO_IncludeName | CDO_IncludeOperand));
logMessage(LOG_DEBUG, "learn: %s", buffer);
if (!message(lmd->mode, buffer, MSG_SYNC|MSG_NODELAY)) lmd->state = LMS_ERROR;
}
return 1;
}
int
learnMode (int timeout) {
LearnModeData lmd = {
.mode = "lrn"
};
pushCommandEnvironment("learnMode", NULL, NULL);
pushCommandHandler("learnMode", KTB_CTX_DEFAULT,
handleLearnModeCommands, NULL, &lmd);
if (setStatusText(&brl, lmd.mode)) {
if (message(lmd.mode, gettext("Learn Mode"), MSG_SYNC|MSG_NODELAY)) {
do {
lmd.state = LMS_TIMEOUT;
if (!asyncAwaitCondition(timeout, testEndLearnWait, &lmd)) break;
} while (lmd.state == LMS_CONTINUE);
if (lmd.state == LMS_TIMEOUT) {
if (!message(lmd.mode, gettext("done"), MSG_SYNC)) {
lmd.state = LMS_ERROR;
}
}
}
}
popCommandEnvironment();
return lmd.state != LMS_ERROR;
}
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