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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 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]
cmd_expand = uzbl.cmd_expand
for cmd in commands:
cmd = 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):
# Event handling hooks.
uzbl.connect_dict({
'INSTANCE_EXIT': del_instance,
'INSTANCE_START': add_instance,
'ON_EVENT': parse_on_event,
})
# Function exports to the uzbl object, `function(uzbl, *args, ..)`
# becomes `uzbl.function(*args, ..)`.
uzbl.export_dict({
'get_on_events': get_on_events,
'on_event': on_event,
})
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