Yes, it is worth doing it, because until Haskeline has been fixed and integrated into ghci, the issue persists and needs to remain filed.
On Fri, 8 Dec 2017 18:25 MarLinn, <monkle...@gmail.com> wrote: > I opened an issue on the Haskeline github ( > https://github.com/judah/haskeline/issues/72). > > But it seems to be completely Haskeline-side, so I'm not sure if it's > worth re-opening the one for ghci? As missing documentation maybe? > (BTW, I found this on the wiki: https://wiki.haskell.org/GHCi_in_colour. > Might be a good place to put it, if linked.) > > If you want to, here are my test cases rewritten as ghci prompts: > > -- single line, positioning error > :set prompt " \ESC[36m%\ESC[0m " > -- single line, works > :set prompt " \ESC[36m\STX%\ESC[0m\STX " > -- multiline, bad output > :set prompt "\ESC[32m\STX–––\ESC[0m\STX\n \ESC[36m\STX%\ESC[0m\STX " > -- multiline, works but is inconsistent > :set prompt "\ESC[32m–––\ESC[0m\n \ESC[36m\STX%\ESC[0m\STX " > > In my tests, the positioning errors consistently happen if there are any > "unclosed" escape-sequences on the last line of the prompt, regardless of > its length. Escape sequences on previous lines consistently create "weird > characters", but don't influence the positioning. Also regardless of their > lengths. That makes sense, as both sets of lines seem to be handled quite > differently. > > Are multiline prompts even used by a lot of people? I like mine because it > gives me a both a list of modules and a consistent cursor position. But > maybe I'm the exception? > > Cheers. > > > On 2017-12-07 23:15, cheater00 cheater00 wrote: > > Interesting. Would you mind reopening the issue and providing a buggy > example? Amd alerting haskeline maintainers? How does it work on a 1 line > prompt that is so long it wraps? > > On Thu, 7 Dec 2017 23:11 MarLinn, <monkle...@gmail.com> wrote: > >> >> > Here's what I use: >> > >> > :set prompt "\ESC[46m\STX%s>\ESC[39;49m\STX " >> > >> > I believe \STX is a signal to haskeline for control sequences. >> > Documentation is here: >> > https://github.com/judah/haskeline/wiki/ControlSequencesInPrompt >> Note: If you're using a multi-line prompt, things may be different >> again. I don't know what the rules are, but I found that if I put \STX >> on any but the last line of prompts I get weird characters. The same >> goes for any \SOH you might want to add for some reason. >> >> Cheers, >> MarLinn >> >> > _______________________________________________ > ghc-devs mailing list > ghc-devs@haskell.org > http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs >
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