So forget proposing QString to operate on visual or logical glyphs. There is QTextBoundaryFinder class that operates on logical items, and QFontMetrics that operates on visual glyphs.
Regards, Konstantin 2015-02-11 21:59 GMT+04:00 Matthew Woehlke <mw_tr...@users.sourceforge.net>: > On 2015-02-11 12:00, Thiago Macieira wrote: > > On Wednesday 11 February 2015 11:49:49 Matthew Woehlke wrote: > >> I'm not going to claim this is the *best* answer, but at least one that > >> seems logical... length() should be the number of times one must hit > >> backspace starting from the end of the text to erase the entire text. > > > > That will depend on the editor. Some may remove the full character with > all > > the combining characters, some others may not. > > Yeah, I thought of that :-/. TBH I think these sorts of things should be > specified by Unicode (if they don't already; I would rather hope they > do) rather than Qt trying to decide how to answer them. > > >> Conversely, I'm sure there are times when you need to know the number of > >> codepoints (e.g. allocating memory to make a copy). Possibly length() > >> and size() should return different results. (Which is a mess, but...) > > > > Uh... no, that's not a good idea. > > > > If we were going do to something like that, we'd have to find a less > confusing > > name. Something like width(). > > Well... yes, for the sake of compatibility I'm inclined to agree. > Changing the meaning of one or both of these, or that they are presently > synonyms, would confuse the heck out of people. That said... Bo *did* > specify "length()" when he wanted a method to return logical characters > and not codepoints. It may be that he's just out of luck there... > > (@Konstantin, yes I'm aware that logical glyphs != codepoints... that > was the whole point of Bo's original request, at least as I understood it.) > > -- > Matthew > > _______________________________________________ > Development mailing list > Development@qt-project.org > http://lists.qt-project.org/mailman/listinfo/development >
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