mirror of https://github.com/garabik/grc.git
220 lines
6.9 KiB
Python
Executable File
220 lines
6.9 KiB
Python
Executable File
#! /usr/bin/python
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import sys, os, string, re, signal, errno
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#some default definitions
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colours = {
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'none' : "",
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'default' : "\033[0m",
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'bold' : "\033[1m",
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'underline' : "\033[4m",
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'blink' : "\033[5m",
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'reverse' : "\033[7m",
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'concealed' : "\033[8m",
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'black' : "\033[30m",
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'red' : "\033[31m",
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'green' : "\033[32m",
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'yellow' : "\033[33m",
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'blue' : "\033[34m",
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'magenta' : "\033[35m",
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'cyan' : "\033[36m",
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'white' : "\033[37m",
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'on_black' : "\033[40m",
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'on_red' : "\033[41m",
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'on_green' : "\033[42m",
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'on_yellow' : "\033[43m",
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'on_blue' : "\033[44m",
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'on_magenta' : "\033[45m",
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'on_cyan' : "\033[46m",
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'on_white' : "\033[47m",
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'beep' : "\007",
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'previous' : "prev",
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'unchanged' : "unchanged",
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# non-standard attributes, supported by some terminals
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'dark' : "\033[2m",
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'italic' : "\033[3m",
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'rapidblink' : "\033[6m",
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'strikethrough': "\033[9m",
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}
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# ignore ctrl C - this is not ideal for standalone grcat, but
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# enables propagating SIGINT to the other subprocess in grc
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signal.signal(signal.SIGINT, signal.SIG_IGN)
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def add2list(clist, m, patterncolour):
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for group in range(0, len(m.groups()) +1):
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if group < len(patterncolour):
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clist.append((m.start(group), m.end(group), patterncolour[group]))
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else:
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clist.append((m.start(group), m.end(group), patterncolour[0]))
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def get_colour(x):
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if x in colours:
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return colours[x]
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elif len(x)>=2 and x[0]=='"' and x[-1]=='"':
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return eval(x)
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else:
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raise ValueError('Bad colour specified: '+x)
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home = []
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conffile = None
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if 'HOME' in os.environ:
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home = [os.environ['HOME']+"/.grc/"]
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conffilepath = [""] + home + ["/usr/local/share/grc/", "/usr/share/grc/"]
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conffile_arg = sys.argv[1] # tentative conffile
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for i in conffilepath:
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if os.path.isfile(i+conffile_arg):
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conffile = i+conffile_arg
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break
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if not conffile:
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sys.stderr.write("config file [%s] not found\n" % sys.argv[1])
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sys.exit(1)
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regexplist = []
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f = open(conffile, "r")
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is_last = 0
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split = str.split
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lower = str.lower
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letters = string.ascii_letters
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while not is_last:
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ll = {'count':"more"}
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while 1:
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l = f.readline()
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if l == "":
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is_last = 1
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break
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if l[0] == "#" or l[0] == '\012':
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continue
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if not l[0] in letters:
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break
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keyword, value = split(l[:-1], "=", 1)
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keyword = lower(keyword)
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if not keyword in ["regexp", "colours", "count", "command", "skip"]:
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raise ValueError("Invalid keyword")
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ll[keyword] = value
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# Split string into one string per regex group
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# e.g. split "brown bold, red" into "brown bold" and
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# "red"
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#colstrings = []
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#for colgroup in split(ll['colours'], ','):
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# colourlist = split(colgroup)
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# c = ""
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# for i in colourlist :
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# c = c + colours[i]
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# colstrings.append(c)
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# do not try to understand the optimized form below :-)
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if 'colours' in ll:
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colstrings = list(
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map(
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lambda colgroup:
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''.join(map(lambda x: get_colour(x), split(colgroup))),
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split(ll['colours'], ',')
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)
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)
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ll['colours'] = colstrings
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cs = ll['count']
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ll['regexp'] = re.compile(ll['regexp']).search
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regexplist.append(ll)
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prevcolour = colours['default']
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prevcount = "more"
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blockflag = 0
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freadline = sys.stdin.readline
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while 1:
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line = freadline()
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if line == "" :
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break
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line = line[:-1]
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clist = []
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skip = 0
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for pattern in regexplist:
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pos = 0
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currcount = pattern['count']
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while 1:
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m = pattern['regexp'](line, pos)
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if m:
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if 'colours' in pattern:
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if currcount == "block":
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blockflag = 1
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blockcolour = pattern['colours'][0]
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currcount = "stop"
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break
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elif currcount == "unblock":
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blockflag = 0
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blockcolour = colours['default']
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currcount = "stop"
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add2list(clist, m, pattern['colours'])
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if currcount == "previous":
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currcount = prevcount
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if currcount == "stop":
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break
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if currcount == "more":
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prevcount = "more"
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pos = m.end(0)
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else:
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prevcount = "once"
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pos = len(line)
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if 'command' in pattern:
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os.system(pattern['command'])
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if 'colours' not in pattern:
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break
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if 'skip' in pattern:
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skip = pattern['skip'] in ("yes", "1", "true")
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if 'colours' not in pattern:
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break
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else: break
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if m and currcount == "stop":
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prevcount = "stop"
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break
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if len(clist) == 0:
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prevcolour = colours['default']
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first_char = 0
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last_char = 0
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length_line = len(line)
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if blockflag == 0:
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cline = (length_line+1)*[colours['default']]
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for i in clist:
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# each position in the string has its own colour
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if i[2] == "prev":
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cline[i[0]:i[1]] = [colours['default']+prevcolour]*(i[1]-i[0])
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elif i[2] != "unchanged":
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cline[i[0]:i[1]] = [colours['default']+i[2]]*(i[1]-i[0])
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if i[0] == 0:
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first_char = 1
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if i[2] != "prev":
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prevcolour = i[2]
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if i[1] == length_line:
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last_char = 1
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if first_char == 0 or last_char == 0:
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prevcolour = colours['default']
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else:
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cline = (length_line+1)*[blockcolour]
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nline = ""
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clineprev = ""
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if not skip:
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for i in range(len(line)):
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if cline[i] == clineprev:
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nline = nline + line[i]
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else:
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nline = nline + cline[i] + line[i]
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clineprev = cline[i]
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nline = nline + colours['default']
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try:
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print(nline)
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except IOError as e:
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if e.errno == errno.EPIPE:
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break
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else:
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raise
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