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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) 1995-2014 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU General Public License, as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any
* later version. Please see the file LICENSE-GPL for details.
*
* Web Page: http://mielke.cc/brltty/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include <stdio.h>
#ifdef HAVE_ICU
#include <unicode/uchar.h>
#endif /* HAVE_ICU */
#include "parameters.h"
#include "cmd_utils.h"
#include "brl_cmds.h"
#include "async_wait.h"
#include "scr.h"
#include "brltty.h"
ToggleResult
toggleBit (
int *bits, int bit, int command,
AlertIdentifier offAlert,
AlertIdentifier onAlert
) {
int oldBits = *bits;
switch (command & BRL_FLG_TOGGLE_MASK) {
case 0:
*bits ^= bit;
break;
case BRL_FLG_TOGGLE_ON:
*bits |= bit;
break;
case BRL_FLG_TOGGLE_OFF:
*bits &= ~bit;
break;
default:
alert(ALERT_COMMAND_REJECTED);
return TOGGLE_ERROR;
}
{
int isOn = (*bits & bit) != 0;
AlertIdentifier identifier = isOn? onAlert: offAlert;
alert(identifier);
if (*bits != oldBits) return isOn? TOGGLE_ON: TOGGLE_OFF;
asyncWait(TUNE_TOGGLE_REPEAT_DELAY);
alert(identifier);
return TOGGLE_SAME;
}
}
int
isTextOffset (int *arg, int end, int relaxed) {
int value = *arg;
if (value < textStart) return 0;
if ((value -= textStart) >= textCount) return 0;
if ((ses->winx + value) >= scr.cols) {
if (!relaxed) return 0;
value = scr.cols - 1 - ses->winx;
}
#ifdef ENABLE_CONTRACTED_BRAILLE
if (isContracted) {
int result = 0;
int index;
for (index=0; index<contractedLength; index+=1) {
int offset = contractedOffsets[index];
if (offset != CTB_NO_OFFSET) {
if (offset > value) {
if (end) result = index - 1;
break;
}
result = index;
}
}
if (end && (index == contractedLength)) result = contractedLength - 1;
value = result;
}
#endif /* ENABLE_CONTRACTED_BRAILLE */
*arg = value;
return 1;
}
int
getCharacterCoordinates (int arg, int *column, int *row, int end, int relaxed) {
if (arg == BRL_MSK_ARG) {
if (!SCR_CURSOR_OK()) return 0;
*column = scr.posx;
*row = scr.posy;
} else {
if (!isTextOffset(&arg, end, relaxed)) return 0;
*column = ses->winx + arg;
*row = ses->winy;
}
return 1;
}
size_t
formatCharacterDescription (char *buffer, size_t size, int column, int row) {
static char *const colours[] = {
strtext("black"),
strtext("blue"),
strtext("green"),
strtext("cyan"),
strtext("red"),
strtext("magenta"),
strtext("brown"),
strtext("light grey"),
strtext("dark grey"),
strtext("light blue"),
strtext("light green"),
strtext("light cyan"),
strtext("light red"),
strtext("light magenta"),
strtext("yellow"),
strtext("white")
};
size_t length;
ScreenCharacter character;
readScreen(column, row, 1, 1, &character);
STR_BEGIN(buffer, size);
{
uint32_t text = character.text;
STR_PRINTF("char %" PRIu32 " (U+%04" PRIX32 "): %s on %s",
text, text,
gettext(colours[character.attributes & 0X0F]),
gettext(colours[(character.attributes & 0X70) >> 4]));
}
if (character.attributes & SCR_ATTR_BLINK) {
STR_PRINTF(" %s", gettext("blink"));
}
#ifdef HAVE_ICU
{
char name[0X40];
UErrorCode error = U_ZERO_ERROR;
u_charName(character.text, U_EXTENDED_CHAR_NAME, name, sizeof(name), &error);
if (U_SUCCESS(error)) {
STR_PRINTF(" [%s]", name);
}
}
#endif /* HAVE_ICU */
length = STR_LENGTH;
STR_END;
return length;
}
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