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'''Plugin provides arbitrary binding of uzbl events to uzbl commands.
Formatting options:
%s = space separated string of the arguments
%r = escaped and quoted version of %s
%1 = argument 1
%2 = argument 2
%n = argument n
Usage:
request ON_EVENT LINK_HOVER set selected_uri = $1
--> LINK_HOVER http://uzbl.org/
<-- set selected_uri = http://uzbl.org/
request ON_EVENT CONFIG_CHANGED print Config changed: %1 = %2
--> CONFIG_CHANGED selected_uri http://uzbl.org/
<-- print Config changed: selected_uri = http://uzbl.org/
'''
import sys
import re
__export__ = ['get_on_events', 'on_event']
UZBLS = {}
def error(msg):
sys.stderr.write('on_event plugin: error: %s\n' % msg)
def add_instance(uzbl, *args):
UZBLS[uzbl] = {}
def del_instance(uzbl, *args):
if uzbl in UZBLS:
del UZBLS[uzbl]
def get_on_events(uzbl):
if uzbl not in UZBLS:
add_instance(uzbl)
return UZBLS[uzbl]
def expand(cmd, args):
'''Replaces "%s %1 %2 %3..." with "<all args> <arg 0> <arg 1>...".'''
# Direct string replace.
if '%s' in cmd:
cmd = cmd.replace('%s', ' '.join(map(unicode, args)))
# Escaped and quoted string replace.
if '%r' in cmd:
joined = ('%r' % ' '.join(map(unicode, args)))[1:]
for char in ['\\', '@']:
joined = joined.replace(char, '\\'+char)
cmd = cmd.replace('%r', joined)
# Arg index string replace.
for (index, arg) in enumerate(args):
index += 1
if '%%%d' % index in cmd:
cmd = cmd.replace('%%%d' % index, unicode(arg))
return cmd
def event_handler(uzbl, *args, **kargs):
'''This function handles all the events being watched by various
on_event definitions and responds accordingly.'''
events = get_on_events(uzbl)
event = kargs['on_event']
if event not in events:
return
commands = events[event]
for cmd in commands:
cmd = expand(cmd, args)
uzbl.send(cmd)
def on_event(uzbl, event, cmd):
'''Add a new event to watch and respond to.'''
event = event.upper()
events = get_on_events(uzbl)
if event not in events:
uzbl.connect(event, event_handler, on_event=event)
events[event] = []
cmds = events[event]
if cmd not in cmds:
cmds.append(cmd)
def parse_on_event(uzbl, args):
'''Parse ON_EVENT events and pass them to the on_event function.
Syntax: "event ON_EVENT <EVENT_NAME> commands".'''
if not args:
return error("missing on_event arguments")
split = args.split(' ', 1)
if len(split) != 2:
return error("invalid ON_EVENT syntax: %r" % args)
event, cmd = split
on_event(uzbl, event, cmd)
def init(uzbl):
connects = {'ON_EVENT': parse_on_event,
'INSTANCE_START': add_instance,
'INSTANCE_EXIT': del_instance}
uzbl.connect_dict(connects)
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