On Sat, Jul 13, 2013 at 5:56 PM, <wxjmfa...@gmail.com> wrote: > Try to write an editor, a text widget, with with a coding > scheme like the Flexible String Represenation. You will > quickly notice, it is impossible (understand correctly). > (You do not need a computer, just a sheet of paper and a pencil) > Hint: what is the character at the caret position?
I would use an internal representation that allows insertion and deletion - in its simplest form, a list of strings. And those strings would be whatever I can most conveniently work with. I've never built a text editor widget, because my libraries always provide them. But there is a rough parallel in the display storage for Gypsum, which stores a series of lines, each of which is a series of sections in different colors. (A line might be a single section, ie one color for its whole length.) I store them in arrays of (color, string, color, string, color, string...). The strings I use are in the format wanted by my display subsystem - which in my case is the native string type of the language, which... oh, what a pity for jmf, is a flexible object that uses 8, 16, or 32 bits for each character. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
