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"""X-Chat 2.0 plugin to show changes made to the topic.
Place in your .xchat2 directory and either reload X-Chat or
/PY LOAD topicdiff.py
0.1 14jan04 initial version
0.2 15jan04 removed UTF-8 (C) that Python didn't like
don't return changes list when everything changes
0.3 17jan04 fix bug when no initial topic
fix bug when entire list of words get changed
"""
__author__ = "Scott James Remnant <scott@netsplit.com>"
__copyright__ = "Copyright (C) 2004 Scott James Remnant <scott@netsplit.com>."
__licence__ = "MIT"
__module_name__ = "topicdiff"
__module_version__ = "0.3"
__module_description__ = "Shows changes made to the topic"
import re
import xchat
def strdiff(old_str, new_str):
changes = []
unchanged = 0
last_hanging = 0
if old_str is None or new_str is None:
return []
old_words = re.sub(r'\s+', ' ', old_str).strip().split(" ")
new_words = re.sub(r'\s+', ' ', new_str).strip().split(" ")
while len(old_words) and len(new_words):
if new_words[0] == old_words[0]:
# Both words match, carry on to the next
new_words = new_words[1:]
old_words = old_words[1:]
last_hanging = 0
unchanged += 1
else:
try:
# Are the first two new words later in old_words?
# If so, we've got deletions
idx = old_words.index(new_words[0])
if idx > 0 and old_words[idx + 1] == new_words[1]:
changes.append(["-", " ".join(old_words[0:idx])])
old_words = old_words[idx:]
last_hanging = 0
continue
except ValueError:
pass
except IndexError:
pass
try:
# Are the first two old words later in new_words?
# If so, we've got additions
idx = new_words.index(old_words[0])
if idx > 0 and new_words[idx + 1] == old_words[1]:
changes.append(["+", " ".join(new_words[0:idx])])
new_words = new_words[idx:]
last_hanging = 0
continue
except ValueError:
pass
except IndexError:
pass
# Swapped words, just kill the old one
# If we did this last time, just append to it (for when an entire
# section of the string is swapped with another)
if last_hanging:
changes[-1][1] += " " + old_words[0]
else:
changes.append(["-", old_words[0]])
old_words = old_words[1:]
last_hanging = 1
if len(old_words):
changes.append(["-", " ".join(old_words)])
if len(new_words):
changes.append(["+", " ".join(new_words)])
if unchanged:
return changes
else:
return []
def topic_change_cb(word, word_eol, userdata):
ctx = xchat.get_context()
channel = ctx.get_info("channel")
old_topic = ctx.get_info("topic")
new_topic = word_eol[3]
if new_topic.startswith(":"):
new_topic = new_topic[1:]
changes = strdiff(old_topic, new_topic)
for mod, change in changes:
ctx.prnt("[Topic] %s %s" % (mod, change,))
return xchat.EAT_NONE
xchat.hook_server("TOPIC", topic_change_cb)
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