[Gtk2] About bug 11523: analysis and proper fix(es)

[Mattias Gaertner]

On Sat, 12 Jul 2008 12:37:17 -0300
Luiz Americo Pereira Camara <luizmed at oi.com.br> wrote:

> The problem occurs because each device context instance has a text
> cache while the layout is shared between all device contexts that
> have the same font.
> [...]
> I implemented  in three ways (see the patches):
> 
> 1) Stores the OldFont (Pangolayout) and compare the Old/New strings 
> using strcomp*
> 
> Than i noticed that is not necessary to store the old font and comes 
> with the 2nd implementation. There's also no more need to be a method
> of TGtk2DeviceContext.
> 
> 2) Just compare the two strings using StrComp*
> 
> * Is better to use StrLComp instead of StrComp
> 
> But i lost the shortcut evaluation of length that prevents a string 
> comparation. So...
> 
> 3) Stores the old length in the layout object using a gquark* and 
> compare both strings with comparebytes (i know that both strings are
> the same size)
> 
> ** The old length can be also stored in a field of font GdiObject

I committed 2 in r15758.

Mattias