/
cmd_expand.py
65 lines (49 loc) · 1.73 KB
/
cmd_expand.py
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import re
SIMPLE = re.compile('^[a-zA-Z]+$')
def escape(str):
for (level, char) in [(1, '\\'), (1, "'"), (1, '"'), (1, '@')]:
str = str.replace(char, (level * '\\') + char)
return str
def cmd_expand(cmd, args):
'''Exports a function that provides the following
expansions in any uzbl command string:
%s = replace('%s', ' '.join(args))
%r = replace('%r', "'%s'" % escaped(' '.join(args)))
%1 = replace('%1', arg[0])
%2 = replace('%2', arg[1])
%n = replace('%n', arg[n-1])
'''
# Ensure (1) all string representable and (2) correct string encoding.
args = list(map(str, args))
# Direct string replace.
if '%s' in cmd:
cmd = cmd.replace('%s', ' '.join(args))
# Escaped and quoted string replace.
if '%r' in cmd:
cmd = cmd.replace('%r', "'%s'" % escape(' '.join(args)))
# Arg index string replace.
idx_list = list(enumerate(args))
idx_list.reverse()
for (index, arg) in idx_list:
index += 1
if '%%%d' % index in cmd:
cmd = cmd.replace('%%%d' % index, str(arg))
return cmd
def format_arg(a):
if SIMPLE.match(a):
return a
return repr(a)
def send_user_command(uzbl, cmd, args):
if cmd[0] == 'event':
has_var = any('@' in x for x in cmd)
event = cmd[1]
args = cmd_expand(' '.join(format_arg(c) for c in cmd[2:]), args)
if not has_var:
# Bypass the roundtrip to uzbl and dispatch immediately
uzbl.event(event, args)
else:
uzbl.send(' '.join(('event', event, args)))
else:
cmd = ' '.join((cmd[0],) + tuple(format_arg(c) for c in cmd[1:]))
cmd = cmd_expand(cmd, args)
uzbl.send(cmd)