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Pop trailing draw command (used before merging or presenting to user) Note that this leaves the ImDrawList in a state unfit for further commands, as m

--------------------------------------------------------------------------------- @brief Performs a trim from start (in place) @param s string to

--------------------------------------------------------------------------------- @brief Performs a trim from end (in place). @param s string to t

Helper: Text buffer for logging/accumulating text

traverse the layout to locate the nearest character to a display position

discard the oldest entry in the undo list

find the x/y location of a character, and remember info about the previous row in case we get a move-up event (for page up, we'll have to rescan)

canoncialize the selection so start <= end

find minimum y position if it starts at x1

rects array must be big enough to accommodate all characters in the given ranges

check if a utf8 string contains a prefix which is the utf16 string; if so return length of matching utf8 string