/** Reset histogram. */
void
Histogram::reset()
{
histogram_block->reset();
// memset(histogram, 0, histogram_size);
number_of_values = 0;
for (unsigned int i = 0; i < undo_num; ++i) {
switch_undo(i);
reset_undo();
}
switch_undo(0);
}
/** Undo. */
void
Histogram::undo()
{
for (unsigned int z = 0; z < depth; ++z) {
for (unsigned int y = 0; y < height; ++y) {
for (unsigned int x = 0; x < width; ++x) {
unsigned int index = z * width * height + y * width + x;
histogram[index] -= undo_overlay[undo_current][index];
}
}
}
number_of_values -= undo_num_vals[undo_current];
reset_undo();
}
void replace(editor_t *ed, int pos, int len, char *buf, int bufsize, int doundo)
{
char *p;
undo_t *undo;
// Store undo information
if (doundo)
{
reset_undo(ed);
undo = ed->undotail;
if (undo && len == 0 && bufsize == 1 && undo->erased == 0 && pos == undo->pos + undo->inserted)
{
// Insert character at end of current redo buffer
undo->redobuf = neutron_realloc(undo->redobuf, undo->inserted + 1);
undo->redobuf[undo->inserted] = *buf;
undo->inserted++;
}
else if (undo && len == 1 && bufsize == 0 && undo->inserted == 0 && pos == undo->pos)
{
// Erase character at end of current undo buffer
undo->undobuf = neutron_realloc(undo->undobuf, undo->erased + 1);
undo->undobuf[undo->erased] = get(ed, pos);
undo->erased++;
}
else if (undo && len == 1 && bufsize == 0 && undo->inserted == 0 && pos == undo->pos - 1)
{
// Erase character at beginning of current undo buffer
undo->pos--;
undo->undobuf = neutron_realloc(undo->undobuf, undo->erased + 1);
memmove(undo->undobuf + 1, undo->undobuf, undo->erased);
undo->undobuf[0] = get(ed, pos);
undo->erased++;
}
else
{
// Create new undo buffer
undo = (undo_t *) neutron_malloc(sizeof (struct _undo_t));
if (ed->undotail) ed->undotail->next = undo;
undo->prev = ed->undotail;
undo->next = 0;
ed->undotail = ed->undo = undo;
if (!ed->undohead) ed->undohead = undo;
undo->pos = pos;
undo->erased = len;
undo->inserted = bufsize;
undo->undobuf = undo->redobuf = 0;
if (len > 0)
{
undo->undobuf = neutron_malloc(len);
copy(ed, undo->undobuf, pos, len);
}
if (bufsize > 0)
{
undo->redobuf = neutron_malloc(bufsize);
memcpy(undo->redobuf, buf, bufsize);
}
}
}
p = ed->start + pos;
if (bufsize == 0 && p <= ed->gap && p + len >= ed->gap)
{
// Handle deletions at the edges of the gap
ed->rest += len - (ed->gap - p);
ed->gap = p;
}
else
{
// Move the gap
move_gap(ed, pos + len, bufsize - len);
// Replace contents
memcpy(ed->start + pos, buf, bufsize);
ed->gap = ed->start + pos + bufsize;
}
// Mark buffer as dirty
ed->dirty = 1;
}