Re: Syntax coloring/highlighting in gnu-readline
On Monday, March 3, 2014 3:06:57 PM UTC+1, Chet Ramey wrote: I have not done any work in this area, and have no immediate plans to. The readline internals do not lend themselves to this very well: the line buffer management and display engines assume that every character in the line buffer contributes to the screen display and should be displayed. You would need an auxiliary data structure to save and manipulate this information. Okay, thanks. Do you have any hints on where to start if I want to implement this? Silke
Re: Syntax coloring/highlighting in gnu-readline
On 3/5/14 3:41 AM, solr...@gmail.com wrote: On Monday, March 3, 2014 3:06:57 PM UTC+1, Chet Ramey wrote: I have not done any work in this area, and have no immediate plans to. The readline internals do not lend themselves to this very well: the line buffer management and display engines assume that every character in the line buffer contributes to the screen display and should be displayed. You would need an auxiliary data structure to save and manipulate this information. Okay, thanks. Do you have any hints on where to start if I want to implement this? Sure. Think about it from a top-down perspective. You need commands to allow users to add and remove `colored regions'. You need a way to represent those regions, or a way to indicate which parts of rl_line_buffer should be highlighted. You need a way to translate those regions into a representation of a line that should be displayed. Then you need a way to tell the redisplay engine in display.c that it should not try and display the characters but instead write them directly to the terminal and that they do not take up real estate on the screen. Chet -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, ITS, CWRUc...@case.eduhttp://cnswww.cns.cwru.edu/~chet/
Re: Syntax coloring/highlighting in gnu-readline
On 3/2/14 7:16 PM, Solros wrote: On Friday, February 10, 2012 4:25:22 PM UTC+1, LanX wrote: I'm trying to interactively add colors while typing in readline and using rl_event_hook to change rl_line_buffer seems to work. Alas the ANSI escape codes for formatting which are allowed in the prompt are not interpreted and shown as they are. I wonder did you manage solve this by now? I want to do the exact same thing and would greatly appreciate any hints. I have not done any work in this area, and have no immediate plans to. The readline internals do not lend themselves to this very well: the line buffer management and display engines assume that every character in the line buffer contributes to the screen display and should be displayed. You would need an auxiliary data structure to save and manipulate this information. Chet -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, ITS, CWRUc...@case.eduhttp://cnswww.cns.cwru.edu/~chet/
Re: Syntax coloring/highlighting in gnu-readline
On Friday, February 10, 2012 4:25:22 PM UTC+1, LanX wrote: I'm trying to interactively add colors while typing in readline and using rl_event_hook to change rl_line_buffer seems to work. Alas the ANSI escape codes for formatting which are allowed in the prompt are not interpreted and shown as they are. I wonder did you manage solve this by now? I want to do the exact same thing and would greatly appreciate any hints. Regards, Silke
Syntax coloring/highlighting in gnu-readline
Hi From my understanding of http://cnswww.cns.cwru.edu/php/chet/readline/rltop.html it's OK to ask gnu-readline questions in this list. I'm trying to interactively add colors while typing in readline and using rl_event_hook to change rl_line_buffer seems to work. Alas the ANSI escape codes for formatting which are allowed in the prompt are not interpreted and shown as they are. I learned from the old discussions I googled entering formatting code would confuse cursor point and history entries. Any other approach to achieve this? Maybe a hook which does the final printing when a line is displayed, where I could inject colors? Cheers Rolf
