int
shiftWindowLeft (unsigned int amount) {
#ifdef ENABLE_CONTRACTED_BRAILLE
if (isContracting()) {
int reference = ses->winx;
int first = 0;
int last = ses->winx - 1;
while (first <= last) {
int end = (ses->winx = (first + last) / 2) + getContractedLength(amount);
if (end < reference) {
first = ses->winx + 1;
} else {
last = ses->winx - 1;
}
}
if (first == reference) {
if (!first) return 0;
first -= 1;
}
ses->winx = first;
return 1;
}
#endif /* ENABLE_CONTRACTED_BRAILLE */
return moveWindowLeft(amount);
}
int
shiftWindowRight (unsigned int amount) {
#ifdef ENABLE_CONTRACTED_BRAILLE
if (isContracting()) amount = getContractedLength(amount);
#endif /* ENABLE_CONTRACTED_BRAILLE */
return moveWindowRight(amount);
}
static int
getWindowLength (void) {
#ifdef ENABLE_CONTRACTED_BRAILLE
if (isContracting()) return getContractedLength(textCount);
#endif /* ENABLE_CONTRACTED_BRAILLE */
return textCount;
}
void
placeRightEdge (int column) {
#ifdef ENABLE_CONTRACTED_BRAILLE
if (isContracting()) {
ses->winx = 0;
while (1) {
int length = getContractedLength(textCount);
int end = ses->winx + length;
if (end > column) break;
if (end == ses->winx) break;
ses->winx = end;
}
} else
#endif /* ENABLE_CONTRACTED_BRAILLE */
{
ses->winx = column / textCount * textCount;
}
}
