On Wed, Jul 20, 2005 at 10:01:22PM +0200, Jean-Marc Lasgouttes wrote: > >On Wed, Jul 20, 2005 at 05:46:03PM +0100, John Levon wrote: > >We can trivially skip the slow bit if we're not change tracking the > >document. The question is what do we do if we /are/ change tracking. > > Could you explain _why_ the old code works with change tracking?
Sure. When we do erase(0, size()), that uses the paragraph_pimpl erase() function, and that updates the change table. For old text, it does not delete the chars. So, we only remove the paragraph is its size is now 0 - this implies that it was a paragraph that was entirely new (blue), so can be removed altogether. Otherwise, we have to keep it. regards john
