[haskeline] #78: control characters in prompt mess up width calculations

[haskeline]

#78: control characters in prompt mess up width calculations
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Reporter:  judah   |        Owner:     
    Type:  defect  |       Status:  new
Priority:  minor   |    Milestone:     
 Version:  0.6     |   Resolution:     
Keywords:          |  
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Comment (by phercek):

 I use ANSI escape sequences for coloring and this seems to work in simple
 cases. But it is incorrect when I search history. I would like to see this
 working well.

 How can one compute the length of control codes in general?

 If there is no general rule then maybe the used sequences of control codes
 can be defined in .haskeline. Each sequence would have defined there how
 much space it takes on the terminal. This would make it compatible with
 windows users (which just would not define any sequence).

-- 
Ticket URL: <http://trac.haskell.org/haskeline/ticket/78#comment:1>
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