On Tue, Mar 11, 2003 at 08:52:23AM +0000, John Levon wrote: > On Tue, Mar 11, 2003 at 09:42:10AM +0100, Lars Gullik Bj?nnes wrote: > > > | Iteration through the whole doc happens only if the cursor is set bey > > | mouseclick or similar. > > > > Not even then, since we then can find a row close to the click, at in > > worst case start from the row at top of screen. > > And how do you convert from the Row * into an iterator ?
You don't have raw Row * anymore. The base concept is that of a "document iterator". A document iterator contains all necessary decisions to get from the logical root of the document (e.g. a Buffer *) to a concrete position in the doc, by including the relevant Paragraph * (or better ParagraphIterator), maybe a Row *, the position in the par, relevant Inset *, nested Inset * and positions etc. So a "document iterator" is a pretty fat beast, but using it for iteration is fast, as "previous/next position" can be done in O(1) time. The cursor is just a thin wrapper around a document iterator. A selection is just a thin wrapper around two document iterators etc. You never pass around raw Row * anymore, just full document iterators. Andre' -- Those who desire to give up Freedom in order to gain Security, will not have, nor do they deserve, either one. (T. Jefferson)
