private void apply(BaseChange change)
{
truncateChanges();
changes.Add(change);
redo(true);
}
private void apply(BaseChange change)
{
truncateChanges();
changes.Add(change);
redo(true);
}
private void redo(bool step)
{
bool quit = true;
do
{
changesIndex++;
BaseChange change = changes[changesIndex];
switch (change.Type)
{
case ChangeType.SetVariant:
{
ChangeSetVariant ch = change as ChangeSetVariant;
tiles[ch.X, ch.Y].Variant = ch.To;
updateTile(ch.X, ch.Y);
break;
}
case ChangeType.ToggleTile:
{
ChangeToggleTile ch = change as ChangeToggleTile;
tiles[ch.X, ch.Y].Variant = 0;
tiles[ch.X, ch.Y].Filled = !tiles[ch.X, ch.Y].Filled;
updateTile(ch.X, ch.Y);
break;
}
case ChangeType.ToggleBlock:
{
ChangeToggleBlock ch = change as ChangeToggleBlock;
tiles[ch.X, ch.Y].ToggleBlock(ch.Dir);
updateBlock(ch.X, ch.Y, ch.Dir);
break;
}
case ChangeType.InternalResize:
{
ChangeInternalResize ch = change as ChangeInternalResize;
int size = ch.Size;
if (size != 0)
{
switch (ch.Dir)
{
case Directions.North:
redoNorthResize(ch);
break;
case Directions.East:
redoEastResize(ch);
break;
case Directions.South:
redoSouthResize(ch);
break;
case Directions.West:
redoWestResize(ch);
break;
default: break;
}
}
if (step)
{
break;
}
if (change.StopRedo)
{
quit = true;
FullRedraw();
}
else
{
quit = false;
}
break;
}
case ChangeType.Convert:
{
ChangeConvert ch = change as ChangeConvert;
post = ch.Forward;
setPostMode(post);
FullRedraw();
break;
}
case ChangeType.ToggleWide:
{
ChangeToggleWide ch = change as ChangeToggleWide;
int tx = ch.X;
int ty = ch.Y;
tiles[tx, ty].Wide = ch.To;
FullRedraw();
break;
}
case ChangeType.SetScrollblockers:
{
ChangeSetScrollBlockers ch = change as ChangeSetScrollBlockers;
Tile tile = tiles[ch.X, ch.Y];
int idx = ch.Index;
if (idx == 0)
{
tile.ScrollBlocker = scrollBlockers.Count;
scrollBlockers.Add(new Pair <int, int>(ch.X, ch.Y));
updateTile(ch.X, ch.Y);
break;
}
for (int i = idx + 1; i < scrollBlockers.Count; i++)
{
int nx = scrollBlockers[i].First;
int ny = scrollBlockers[i].Second;
tiles[nx, ny].ScrollBlocker--;
updateTile(nx, ny);
}
tile.ScrollBlocker = 0;
updateTile(ch.X, ch.Y);
scrollBlockers.RemoveAt(idx);
break;
}
default: break;
}
} while (!quit);
if (changesIndex + 1 == changes.Count)
{
setRedo(false);
}
setUndo(true);
}
/// <summary>
/// Handler for action undoing.
/// </summary>
public void Undo()
{
bool quit = true;
do
{
BaseChange change = changes[changesIndex];
switch (change.Type)
{
case ChangeType.SetVariant:
{
ChangeSetVariant ch = change as ChangeSetVariant;
tiles[ch.X, ch.Y].Variant = ch.From;
updateTile(ch.X, ch.Y);
break;
}
case ChangeType.ToggleTile:
{
ChangeToggleTile ch = change as ChangeToggleTile;
tiles[ch.X, ch.Y].Variant = ch.PreviousVariant;
tiles[ch.X, ch.Y].Filled = !tiles[ch.X, ch.Y].Filled;
updateTile(ch.X, ch.Y);
break;
}
case ChangeType.ToggleBlock:
{
ChangeToggleBlock ch = change as ChangeToggleBlock;
tiles[ch.X, ch.Y].ToggleBlock(ch.Dir);
updateBlock(ch.X, ch.Y, ch.Dir);
break;
}
case ChangeType.InternalResize:
{
ChangeInternalResize ch = change as ChangeInternalResize;
int size = ch.Size;
if (size != 0)
{
switch (ch.Dir)
{
case Directions.North:
undoNorthResize(ch);
break;
case Directions.East:
undoEastResize(ch);
break;
case Directions.South:
undoSouthResize(ch);
break;
case Directions.West:
undoWestResize(ch);
break;
default: break;
}
}
if (change.StopUndo)
{
FullRedraw();
quit = true;
}
else
{
quit = false;
}
break;
}
case ChangeType.ToggleWide:
{
ChangeToggleWide ch = change as ChangeToggleWide;
int tx = ch.X;
int ty = ch.Y;
tiles[tx, ty].Wide = ch.From;
FullRedraw();
break;
}
case ChangeType.Convert:
{
ChangeConvert ch = change as ChangeConvert;
post = !ch.Forward;
setPostMode(post);
FullRedraw();
break;
}
case ChangeType.SetScrollblockers:
{
ChangeSetScrollBlockers ch = change as ChangeSetScrollBlockers;
int idx = ch.Index;
Tile tile = tiles[ch.X, ch.Y];
if (idx == 0) // was new
{
tile.ScrollBlocker = 0;
scrollBlockers.RemoveAt(scrollBlockers.Count - 1);
updateTile(ch.X, ch.Y);
break;
}
// was deleted at idx position
tile.ScrollBlocker = idx;
scrollBlockers.Insert(idx, new Pair <int, int>(ch.X, ch.Y));
for (int i = idx + 1; i < scrollBlockers.Count; i++)
{
int nx = scrollBlockers[i].First;
int ny = scrollBlockers[i].Second;
tiles[nx, ny].ScrollBlocker++;
updateTile(nx, ny);
}
updateTile(ch.X, ch.Y);
break;
}
default: break;
}
changesIndex--;
} while (!quit);
if (changesIndex == 0)
{
setUndo(false);
}
setRedo(true);
}