Hi Nicolas Pitre <[email protected]> writes: > On Tue, 13 Mar 2018, Dave Mielke wrote: > > I completely understand your reason and the convenience. I'm just not > > convinced > > that it'd actually work all that well as a general facility for the > > inexperienced.
> But the inexperienced wouldn't have to do anything if the default > mimics the current behavior, no? > However such a feature i.e. the ability to modify what NXPROMPT matches, > could be very useful to those who are experienced enough to tweak their > prompt. > I think this would be a worthwhile feature if the default preserves > existing functionality for those who don't care about the extra > flexibility. I consider the current behaviour to be a little bit of a hack itself. I consider it to be a big limitation that in order to be able to move from one prompt to another I have to first position the braille window on a line which already has a prompt. Another big limitation is that I can't move between two different types of prompts. I would prefer to have PRPROMPT/NXPROMPT commands which are totally context-insensitive - i.e. regex-match based. I suggest here two alternative implementations: First proposal - add prompt-pattern configuration option: This option is a string, which is a regular expression pattern. NXPROMPT and PRPROMPT commands move the window down and up respectively until the contents of the line on which the window is matches this regular expression. THe expression can be arbitrarily complex, and because regex supports alternatives, it can easily recognize many different types of prompts. Here is an example, which matches a normal [user@host dir]$ shell prompt in addition to python, gdb and irb. "^\[[^ ]+@[^ ]+ [^]]+\][$#] |^>>>|^\.\.\.|^\(gdb\) |^irb\([^)]+\):\d+:\d+. " If prompt-pattern was not defined or was set to a specific value (e.g. empty string), then BRLTTY's current context-sensitive behaviour would be invoked instead of pattern matching. Second proposal - add new matching commands: Don't modify NXPROMPT or PROMPT commands. Instead add NXMATCH and PRMATCH commands which match a regex pattern in a way described in the previous section. This command would use a pattern defined in brltty.conf with default-pattern option. There could be additional commands for modifying this pattern - e.g. SETPATTERN (which sets the pattern from the current contents of clipboard), RESETPATTERN (which resets it back to the default value) and CLIP_PATTERN (which would copy the pattern to clipboarrd for pasting and editing it). These NXMATCH and PRMATCH commands could be unbound by default, so that they are really available to power users only. I'm actually up for the second proposal, because it would allow me to dynamically change the pattern. -- Aura _______________________________________________ This message was sent via the BRLTTY mailing list. To post a message, send an e-mail to: [email protected] For general information, go to: http://brltty.com/mailman/listinfo/brltty
