Staging
v0.8.1
v0.8.1
https://github.com/python/cpython
Tip revision: 4082f600a5bd69c8f4a36111fa5eb197d7547756 authored by Ned Deily on 01 October 2019, 17:23:17 UTC
3.7.5rc1
3.7.5rc1
Tip revision: 4082f60
autoexpand.py
'''Complete the current word before the cursor with words in the editor.
Each menu selection or shortcut key selection replaces the word with a
different word with the same prefix. The search for matches begins
before the target and moves toward the top of the editor. It then starts
after the cursor and moves down. It then returns to the original word and
the cycle starts again.
Changing the current text line or leaving the cursor in a different
place before requesting the next selection causes AutoExpand to reset
its state.
There is only one instance of Autoexpand.
'''
import re
import string
class AutoExpand:
wordchars = string.ascii_letters + string.digits + "_"
def __init__(self, editwin):
self.text = editwin.text
self.bell = self.text.bell
self.state = None
def expand_word_event(self, event):
"Replace the current word with the next expansion."
curinsert = self.text.index("insert")
curline = self.text.get("insert linestart", "insert lineend")
if not self.state:
words = self.getwords()
index = 0
else:
words, index, insert, line = self.state
if insert != curinsert or line != curline:
words = self.getwords()
index = 0
if not words:
self.bell()
return "break"
word = self.getprevword()
self.text.delete("insert - %d chars" % len(word), "insert")
newword = words[index]
index = (index + 1) % len(words)
if index == 0:
self.bell() # Warn we cycled around
self.text.insert("insert", newword)
curinsert = self.text.index("insert")
curline = self.text.get("insert linestart", "insert lineend")
self.state = words, index, curinsert, curline
return "break"
def getwords(self):
"Return a list of words that match the prefix before the cursor."
word = self.getprevword()
if not word:
return []
before = self.text.get("1.0", "insert wordstart")
wbefore = re.findall(r"\b" + word + r"\w+\b", before)
del before
after = self.text.get("insert wordend", "end")
wafter = re.findall(r"\b" + word + r"\w+\b", after)
del after
if not wbefore and not wafter:
return []
words = []
dict = {}
# search backwards through words before
wbefore.reverse()
for w in wbefore:
if dict.get(w):
continue
words.append(w)
dict[w] = w
# search onwards through words after
for w in wafter:
if dict.get(w):
continue
words.append(w)
dict[w] = w
words.append(word)
return words
def getprevword(self):
"Return the word prefix before the cursor."
line = self.text.get("insert linestart", "insert")
i = len(line)
while i > 0 and line[i-1] in self.wordchars:
i = i-1
return line[i:]
if __name__ == '__main__':
from unittest import main
main('idlelib.idle_test.test_autoexpand', verbosity=2)