ANSI Escape Codes
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I'm trying to make a console-based program that makes use of ANSI
escape codes. I can't seem to figure out how to go about printing a string object formatted with ANSI escape codes. I've tried the following. '\x1b[31mHi' displayNl This prints the entire string, including the escape code, without any formatting. I would have expected this to print "Hi" in red (and then everything else in the console after that, as I didn't include the escape code to reset the color.) After googling a bit, I was able to find a couple issues where people were trying to produce things like newlines using "\n". Most of the answers were using the Transcript object's cr method, but I didn't find anything about colors in the textCollector class. It looks like it shouldn't be all that hard to create my own module in C to achieve this functionality, but I'd like to know if there's a better way first. I'm aware of the ncurses bindings, but I'm not sure that'd be practical for just making certain pieces of text in the program colored. So, is there a standard way of outputting colored text to the terminal in GNU Smalltalk using ANSI escape sequences? Thanks! _______________________________________________ help-smalltalk mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-smalltalk |
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Il 08/07/2014 02:50, Ryland Taylor-Almanza ha scritto:
> I'm trying to make a console-based program that makes use of ANSI > escape codes. I can't seem to figure out how to go about printing a > string object formatted with ANSI escape codes. I've tried the > following. > > '\x1b[31mHi' displayNl You can use formatted strings to put the Escape character in place: ('%1[31mHi' % #($<16r1b>)) displayNl. Paolo _______________________________________________ help-smalltalk mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-smalltalk |
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This seems to be giving me the following error.
stdin:1: parse error, expected '>' My apologies if I'm missing something. I'm a bit new to smalltalk On Tue, Jul 8, 2014 at 1:13 AM, Paolo Bonzini <[hidden email]> wrote: > Il 08/07/2014 02:50, Ryland Taylor-Almanza ha scritto: > >> I'm trying to make a console-based program that makes use of ANSI >> escape codes. I can't seem to figure out how to go about printing a >> string object formatted with ANSI escape codes. I've tried the >> following. >> >> '\x1b[31mHi' displayNl > > > You can use formatted strings to put the Escape character in place: > > ('%1[31mHi' % #($<16r1b>)) displayNl. > > Paolo > > _______________________________________________ > help-smalltalk mailing list > [hidden email] > https://lists.gnu.org/mailman/listinfo/help-smalltalk _______________________________________________ help-smalltalk mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-smalltalk |
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Il 08/07/2014 18:29, Ryland Taylor-Almanza ha scritto:
> This seems to be giving me the following error. > > stdin:1: parse error, expected '>' You're probably using an older version of GNU Smalltalk. What version are you running on ("Smalltalk version" will tell you). Paolo > My apologies if I'm missing something. I'm a bit new to smalltalk > > On Tue, Jul 8, 2014 at 1:13 AM, Paolo Bonzini <[hidden email]> wrote: >> Il 08/07/2014 02:50, Ryland Taylor-Almanza ha scritto: >> >>> I'm trying to make a console-based program that makes use of ANSI >>> escape codes. I can't seem to figure out how to go about printing a >>> string object formatted with ANSI escape codes. I've tried the >>> following. >>> >>> '\x1b[31mHi' displayNl >> >> >> You can use formatted strings to put the Escape character in place: >> >> ('%1[31mHi' % #($<16r1b>)) displayNl. >> >> Paolo >> >> _______________________________________________ >> help-smalltalk mailing list >> [hidden email] >> https://lists.gnu.org/mailman/listinfo/help-smalltalk > > _______________________________________________ > help-smalltalk mailing list > [hidden email] > https://lists.gnu.org/mailman/listinfo/help-smalltalk > _______________________________________________ help-smalltalk mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-smalltalk |
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Looks like I'm running 3.2.5, which came from my system's repos. Is it
recommended that I use the 3.3 alpha? On Tue, Jul 8, 2014 at 10:26 AM, Paolo Bonzini <[hidden email]> wrote: > Il 08/07/2014 18:29, Ryland Taylor-Almanza ha scritto: > >> This seems to be giving me the following error. >> >> stdin:1: parse error, expected '>' > > > You're probably using an older version of GNU Smalltalk. What version are > you running on ("Smalltalk version" will tell you). > > Paolo > > >> My apologies if I'm missing something. I'm a bit new to smalltalk >> >> On Tue, Jul 8, 2014 at 1:13 AM, Paolo Bonzini <[hidden email]> wrote: >>> >>> Il 08/07/2014 02:50, Ryland Taylor-Almanza ha scritto: >>> >>>> I'm trying to make a console-based program that makes use of ANSI >>>> escape codes. I can't seem to figure out how to go about printing a >>>> string object formatted with ANSI escape codes. I've tried the >>>> following. >>>> >>>> '\x1b[31mHi' displayNl >>> >>> >>> >>> You can use formatted strings to put the Escape character in place: >>> >>> ('%1[31mHi' % #($<16r1b>)) displayNl. >>> >>> Paolo >>> >>> _______________________________________________ >>> help-smalltalk mailing list >>> [hidden email] >>> https://lists.gnu.org/mailman/listinfo/help-smalltalk >> >> >> _______________________________________________ >> help-smalltalk mailing list >> [hidden email] >> https://lists.gnu.org/mailman/listinfo/help-smalltalk >> > _______________________________________________ help-smalltalk mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-smalltalk |
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Il 08/07/2014 19:58, Ryland Taylor-Almanza ha scritto:
> Looks like I'm running 3.2.5, which came from my system's repos. Is it > recommended that I use the 3.3 alpha? No, my mistake---it's just ('%1[31mHi' % #($<16r1B>)) displayNl. with an uppercase B. Paolo > On Tue, Jul 8, 2014 at 10:26 AM, Paolo Bonzini <[hidden email]> wrote: >> Il 08/07/2014 18:29, Ryland Taylor-Almanza ha scritto: >> >>> This seems to be giving me the following error. >>> >>> stdin:1: parse error, expected '>' >> >> >> You're probably using an older version of GNU Smalltalk. What version are >> you running on ("Smalltalk version" will tell you). >> >> Paolo >> >> >>> My apologies if I'm missing something. I'm a bit new to smalltalk >>> >>> On Tue, Jul 8, 2014 at 1:13 AM, Paolo Bonzini <[hidden email]> wrote: >>>> >>>> Il 08/07/2014 02:50, Ryland Taylor-Almanza ha scritto: >>>> >>>>> I'm trying to make a console-based program that makes use of ANSI >>>>> escape codes. I can't seem to figure out how to go about printing a >>>>> string object formatted with ANSI escape codes. I've tried the >>>>> following. >>>>> >>>>> '\x1b[31mHi' displayNl >>>> >>>> >>>> >>>> You can use formatted strings to put the Escape character in place: >>>> >>>> ('%1[31mHi' % #($<16r1b>)) displayNl. >>>> >>>> Paolo >>>> >>>> _______________________________________________ >>>> help-smalltalk mailing list >>>> [hidden email] >>>> https://lists.gnu.org/mailman/listinfo/help-smalltalk >>> >>> >>> _______________________________________________ >>> help-smalltalk mailing list >>> [hidden email] >>> https://lists.gnu.org/mailman/listinfo/help-smalltalk >>> >> > _______________________________________________ help-smalltalk mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-smalltalk |
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Il 08/07/2014 23:02, Ryland Taylor-Almanza ha scritto:
> Looks like it works! Thanks Paolo! I don't really understand what > that's doing, though. Do you have any resources you could link that > explain what that whole (<string> % #($<16r1B>)) bit does? "%" is just a so called "interpolation" operator. It looks for sequences that look like %number and replaces them with elements from the array on the right of the %. In this case the array has one element and that element is a character with ASCII code 1B (in hexadecimal). So the %1 in "%1[31mHi" is replaced with the escape character and printed. Paolo > On Tue, Jul 8, 2014 at 12:58 PM, Paolo Bonzini <[hidden email]> wrote: >> Il 08/07/2014 19:58, Ryland Taylor-Almanza ha scritto: >> >>> Looks like I'm running 3.2.5, which came from my system's repos. Is it >>> recommended that I use the 3.3 alpha? >> >> >> No, my mistake---it's just >> >> ('%1[31mHi' % #($<16r1B>)) displayNl. >> >> with an uppercase B. >> >> Paolo >> >> >>> On Tue, Jul 8, 2014 at 10:26 AM, Paolo Bonzini <[hidden email]> wrote: >>>> >>>> Il 08/07/2014 18:29, Ryland Taylor-Almanza ha scritto: >>>> >>>>> This seems to be giving me the following error. >>>>> >>>>> stdin:1: parse error, expected '>' >>>> >>>> >>>> >>>> You're probably using an older version of GNU Smalltalk. What version >>>> are >>>> you running on ("Smalltalk version" will tell you). >>>> >>>> Paolo >>>> >>>> >>>>> My apologies if I'm missing something. I'm a bit new to smalltalk >>>>> >>>>> On Tue, Jul 8, 2014 at 1:13 AM, Paolo Bonzini <[hidden email]> wrote: >>>>>> >>>>>> >>>>>> Il 08/07/2014 02:50, Ryland Taylor-Almanza ha scritto: >>>>>> >>>>>>> I'm trying to make a console-based program that makes use of ANSI >>>>>>> escape codes. I can't seem to figure out how to go about printing a >>>>>>> string object formatted with ANSI escape codes. I've tried the >>>>>>> following. >>>>>>> >>>>>>> '\x1b[31mHi' displayNl >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> You can use formatted strings to put the Escape character in place: >>>>>> >>>>>> ('%1[31mHi' % #($<16r1b>)) displayNl. >>>>>> >>>>>> Paolo >>>>>> >>>>>> _______________________________________________ >>>>>> help-smalltalk mailing list >>>>>> [hidden email] >>>>>> https://lists.gnu.org/mailman/listinfo/help-smalltalk >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> help-smalltalk mailing list >>>>> [hidden email] >>>>> https://lists.gnu.org/mailman/listinfo/help-smalltalk >>>>> >>>> >>> >> > _______________________________________________ help-smalltalk mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-smalltalk |
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