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'''Keycmd completion.'''
# A list of functions this plugin exports to be used via uzbl object.
__export__ = ['start_completion', 'get_completion_dict']
import re
# Holds the per-instance completion dicts.
UZBLS = {}
# Completion level
NONE, ONCE, LIST, COMPLETE = range(4)
# Default instance dict.
DEFAULTS = {'completions': [], 'level': NONE, 'lock': False}
# The reverse keyword finding re.
FIND_SEGMENT = re.compile("(\@[\w_]+|set[\s]+[\w_]+|[\w_]+)$").findall
# Formats
LIST_FORMAT = "<span> %s </span>"
ITEM_FORMAT = "<span @hint_style>%s</span>%s"
def escape(str):
return str.replace("@", "\@")
def add_instance(uzbl, *args):
UZBLS[uzbl] = dict(DEFAULTS)
# Make sure the config keys for all possible completions are known.
uzbl.send('dump_config_as_events')
def del_instance(uzbl, *args):
if uzbl in UZBLS:
del UZBLS[uzbl]
def get_completion_dict(uzbl):
'''Get data stored for an instance.'''
if uzbl not in UZBLS:
add_instance(uzbl)
return UZBLS[uzbl]
def get_incomplete_keyword(uzbl):
'''Gets the segment of the keycmd leading up to the cursor position and
uses a regular expression to search backwards finding parially completed
keywords or @variables. Returns a null string if the correct completion
conditions aren't met.'''
keylet = uzbl.get_keylet()
left_segment = keylet.keycmd[:keylet.cursor]
partial = (FIND_SEGMENT(left_segment) + ['',])[0].lstrip()
if partial.startswith('set '):
return ('@%s' % partial[4:].lstrip(), True)
return (partial, False)
def stop_completion(uzbl, *args):
'''Stop command completion and return the level to NONE.'''
d = get_completion_dict(uzbl)
d['level'] = NONE
uzbl.set('completion_list')
def complete_completion(uzbl, partial, hint, set_completion=False):
'''Inject the remaining porition of the keyword into the keycmd then stop
the completioning.'''
if set_completion:
remainder = "%s = " % hint[len(partial):]
else:
remainder = "%s " % hint[len(partial):]
uzbl.inject_keycmd(remainder)
stop_completion(uzbl)
def partial_completion(uzbl, partial, hint):
'''Inject a common portion of the hints into the keycmd.'''
remainder = hint[len(partial):]
uzbl.inject_keycmd(remainder)
def update_completion_list(uzbl, *args):
'''Checks if the user still has a partially completed keyword under his
cursor then update the completion hints list.'''
partial = get_incomplete_keyword(uzbl)[0]
if not partial:
return stop_completion(uzbl)
d = get_completion_dict(uzbl)
if d['level'] < LIST:
return
hints = [h for h in d['completions'] if h.startswith(partial)]
if not hints:
return uzbl.set('completion_list')
j = len(partial)
l = [ITEM_FORMAT % (escape(h[:j]), h[j:]) for h in sorted(hints)]
uzbl.set('completion_list', LIST_FORMAT % ' '.join(l))
def start_completion(uzbl, *args):
d = get_completion_dict(uzbl)
if d['lock']:
return
(partial, set_completion) = get_incomplete_keyword(uzbl)
if not partial:
return stop_completion(uzbl)
if d['level'] < COMPLETE:
d['level'] += 1
hints = [h for h in d['completions'] if h.startswith(partial)]
if not hints:
return
elif len(hints) == 1:
d['lock'] = True
complete_completion(uzbl, partial, hints[0], set_completion)
d['lock'] = False
return
elif partial in hints and d['level'] == COMPLETE:
d['lock'] = True
complete_completion(uzbl, partial, partial, set_completion)
d['lock'] = False
return
smalllen, smallest = sorted([(len(h), h) for h in hints])[0]
common = ''
for i in range(len(partial), smalllen):
char, same = smallest[i], True
for hint in hints:
if hint[i] != char:
same = False
break
if not same:
break
common += char
if common:
d['lock'] = True
partial_completion(uzbl, partial, partial+common)
d['lock'] = False
update_completion_list(uzbl)
def add_builtins(uzbl, args):
'''Pump the space delimited list of builtin commands into the
builtin list.'''
completions = get_completion_dict(uzbl)['completions']
builtins = filter(None, map(unicode.strip, args.split(" ")))
for builtin in builtins:
if builtin not in completions:
completions.append(builtin)
def add_config_key(uzbl, key, value):
'''Listen on the CONFIG_CHANGED event and add config keys to the variable
list for @var<Tab> like expansion support.'''
completions = get_completion_dict(uzbl)['completions']
key = "@%s" % key
if key not in completions:
completions.append(key)
def init(uzbl):
# Event handling hooks.
uzbl.connect_dict({
'BUILTINS': add_builtins,
'CONFIG_CHANGED': add_config_key,
'INSTANCE_EXIT': del_instance,
'INSTANCE_START': add_instance,
'KEYCMD_CLEARED': stop_completion,
'KEYCMD_EXEC': stop_completion,
'KEYCMD_UPDATE': update_completion_list,
'START_COMPLETION': start_completion,
'STOP_COMPLETION': stop_completion,
})
# Function exports to the uzbl object, `function(uzbl, *args, ..)`
# becomes `uzbl.function(*args, ..)`.
uzbl.export_dict({
'get_completion_dict': get_completion_dict,
'start_completion': start_completion,
})
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