public static void nk_textedit_discard_redo(nk_text_undo_state state)
{
ulong num;
int k = (int)(99 - 1);
if (state.redo_point <= k)
{
if ((state.undo_rec[k].char_storage) >= (0))
{
int n = (int)(state.undo_rec[k].insert_length);
int i;
state.redo_char_point = ((short)(state.redo_char_point + n));
num = ((ulong)(999 - state.redo_char_point));
nk_memcopy((char *)state.undo_char + state.redo_char_point, (char *)state.undo_char + state.redo_char_point - n,
(ulong)(num * sizeof(char)));
for (i = (int)(state.redo_point); (i) < (k); ++i)
{
if ((((nk_text_undo_record *)state.undo_rec + i)->char_storage) >= (0))
{
((nk_text_undo_record *)state.undo_rec + i)->char_storage =
((short)(((nk_text_undo_record *)state.undo_rec + i)->char_storage + n));
}
}
}
++state.redo_point;
num = ((ulong)(99 - state.redo_point));
if ((num) != 0)
{
nk_memcopy((nk_text_undo_record *)state.undo_rec + state.redo_point - 1,
(nk_text_undo_record *)state.undo_rec + state.redo_point, (ulong)(num * (ulong)sizeof(nk_text_undo_record)));
}
}
}
public static int?nk_textedit_createundo(nk_text_undo_state state, int pos, int insert_len, int delete_len)
{
int?rpos = nk_textedit_create_undo_record(state, (int)(insert_len));
if (rpos == null)
{
return(null);
}
var rposv = rpos.Value;
state.undo_rec[rposv].where = (int)(pos);
state.undo_rec[rposv].insert_length = ((short)(insert_len));
state.undo_rec[rposv].delete_length = ((short)(delete_len));
if ((insert_len) == (0))
{
state.undo_rec[rposv].char_storage = (short)(-1);
return(null);
}
else
{
state.undo_rec[rposv].char_storage = (short)(state.undo_char_point);
state.undo_char_point = ((short)(state.undo_char_point + insert_len));
return(state.undo_rec[rposv].char_storage);
}
}
public static void nk_textedit_discard_undo(nk_text_undo_state state)
{
if ((state.undo_point) > (0))
{
if ((state.undo_rec[0].char_storage) >= (0))
{
int n = (int)(state.undo_rec[0].insert_length);
int i;
state.undo_char_point = ((short)(state.undo_char_point - n));
nk_memcopy(state.undo_char, (char *)(char *)state.undo_char + n,
(ulong)((ulong)(state.undo_char_point) * sizeof(uint)));
for (i = (int)(0); (i) < (state.undo_point); ++i)
{
if ((((nk_text_undo_record *)state.undo_rec + i)->char_storage) >= (0))
{
((nk_text_undo_record *)state.undo_rec + i)->char_storage =
((short)(((nk_text_undo_record *)state.undo_rec + i)->char_storage - n));
}
}
}
--state.undo_point;
nk_memcopy(state.undo_rec, (nk_text_undo_record *)state.undo_rec + 1,
(ulong)((ulong)(state.undo_point) * (ulong)sizeof(nk_text_undo_record)));
}
}
public static void nk_textedit_discard_redo(nk_text_undo_state state)
{
int num;
int k = (int)(99 - 1);
if (state.redo_point <= k)
{
if ((state.undo_rec[k].char_storage) >= (0))
{
int n = (int)(state.undo_rec[k].insert_length);
int i;
state.redo_char_point = ((short)(state.redo_char_point + n));
num = 999 - state.redo_char_point;
Array.Copy(state.undo_char, state.redo_char_point - n, state.undo_char, state.redo_char_point, num);
for (i = (int)(state.redo_point); (i) < (k); ++i)
{
if ((state.undo_rec[i].char_storage) >= (0))
{
state.undo_rec[i].char_storage =
((short)(state.undo_rec[i].char_storage + n));
}
}
}
++state.redo_point;
num = 99 - state.redo_point;
if ((num) != 0)
{
Array.Copy(state.undo_rec, state.redo_point, state.undo_rec, state.redo_point - 1, num);
}
}
}
public static void nk_textedit_discard_undo(nk_text_undo_state state)
{
if ((state.undo_point) > (0))
{
if ((state.undo_rec[0].char_storage) >= (0))
{
int n = (int)(state.undo_rec[0].insert_length);
int i;
state.undo_char_point = ((short)(state.undo_char_point - n));
Array.Copy(state.undo_char, n, state.undo_char, 0, state.undo_char_point);
for (i = (int)(0); (i) < (state.undo_point); ++i)
{
if ((state.undo_rec[i].char_storage) >= (0))
{
state.undo_rec[i].char_storage =
((short)(state.undo_rec[i].char_storage - n));
}
}
}
--state.undo_point;
Array.Copy(state.undo_rec, 1, state.undo_rec, 0, state.undo_point);
}
}
public static void nk_textedit_undo(nk_text_edit state)
{
nk_text_undo_state s = state.Undo;
nk_text_undo_record u = new nk_text_undo_record();
if ((s.undo_point) == (0))
{
return;
}
u = (nk_text_undo_record)(s.undo_rec[s.undo_point - 1]);
fixed(nk_text_undo_record *r2 = s.undo_rec)
{
var r = r2 + s.redo_point - 1;
r->char_storage = (short)(-1);
r->insert_length = (short)(u.delete_length);
r->delete_length = (short)(u.insert_length);
r->where = (int)(u.where);
if ((u.delete_length) != 0)
{
if ((s.undo_char_point + u.delete_length) >= (999))
{
r->insert_length = (short)(0);
}
else
{
int i;
while ((s.undo_char_point + u.delete_length) > (s.redo_char_point))
{
nk_textedit_discard_redo(s);
if ((s.redo_point) == (99))
{
return;
}
}
r = r2 + s.redo_point - 1;
r->char_storage = ((short)(s.redo_char_point - u.delete_length));
s.redo_char_point = ((short)(s.redo_char_point - u.delete_length));
for (i = (int)(0); (i) < (u.delete_length); ++i)
{
s.undo_char[r->char_storage + i] = (char)(state.Text[(int)(u.where + i)]);
}
}
state.Text.remove_at((int)(u.where), (int)(u.delete_length));
}
}
if ((u.insert_length) != 0)
{
state.Text.insert_at((int)(u.where), s.undo_char, u.char_storage, (int)(u.insert_length));
s.undo_char_point = ((short)(s.undo_char_point - u.insert_length));
}
state.Cursor = (int)((short)(u.where + u.insert_length));
s.undo_point--;
s.redo_point--;
}
public static void nk_textedit_redo(nk_text_edit state)
{
nk_text_undo_state s = state.Undo;
nk_text_undo_record *u;
nk_text_undo_record r = new nk_text_undo_record();
if ((s.redo_point) == (99))
{
return;
fixed(nk_text_undo_record *u2 = s.undo_rec)
{
u = u2 + s.undo_point;
r = (nk_text_undo_record)(s.undo_rec[s.redo_point]);
u->delete_length = (short)(r.insert_length);
u->insert_length = (short)(r.delete_length);
u->where = (int)(r.where);
u->char_storage = (short)(-1);
if ((r.delete_length) != 0)
{
if ((s.undo_char_point + u->insert_length) > (s.redo_char_point))
{
u->insert_length = (short)(0);
u->delete_length = (short)(0);
}
else
{
int i;
u->char_storage = (short)(s.undo_char_point);
s.undo_char_point = ((short)(s.undo_char_point + u->insert_length));
for (i = (int)(0); (i) < (u->insert_length); ++i)
{
s.undo_char[u->char_storage + i] = (char)(state.Text[(int)(u->where + i)]);
}
}
state.Text.remove_at((int)(r.where), (int)(r.delete_length));
}
}
if ((r.insert_length) != 0)
{
state.Text.insert_at((int)(r.where), s.undo_char, r.char_storage, (int)(r.insert_length));
}
state.Cursor = (int)(r.where + r.insert_length);
s.undo_point++;
s.redo_point++;
}
public static nk_text_undo_record *nk_textedit_create_undo_record(nk_text_undo_state state, int numchars)
{
nk_textedit_flush_redo(state);
if ((state.undo_point) == (99))
{
nk_textedit_discard_undo(state);
}
if ((numchars) > (999))
{
state.undo_point = (short)(0);
state.undo_char_point = (short)(0);
return(null);
}
while ((state.undo_char_point + numchars) > (999))
{
nk_textedit_discard_undo(state);
}
return((nk_text_undo_record *)state.undo_rec + (state.undo_point++));
}
public static char *nk_textedit_createundo(nk_text_undo_state state, int pos, int insert_len, int delete_len)
{
nk_text_undo_record *r = nk_textedit_create_undo_record(state, (int)(insert_len));
if ((r) == (null))
{
return(null);
}
r->where = (int)(pos);
r->insert_length = ((short)(insert_len));
r->delete_length = ((short)(delete_len));
if ((insert_len) == (0))
{
r->char_storage = (short)(-1);
return(null);
}
else
{
r->char_storage = (short)(state.undo_char_point);
state.undo_char_point = ((short)(state.undo_char_point + insert_len));
return((char *)state.undo_char + r->char_storage);
}
}
public static void nk_textedit_flush_redo(nk_text_undo_state state)
{
state.redo_point = (short)(99);
state.redo_char_point = (short)(999);
}