summaryrefslogtreecommitdiffstats
path: root/Tools/idle/AutoExpand.py
blob: 0d57be4205b43f83ec5164eb62dfe5e4579c7599 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
import string
import re

###$ event <<expand-word>>
###$ win <Alt-slash>
###$ unix <Alt-slash>

class AutoExpand:

    keydefs = {
        '<<expand-word>>': ['<Alt-slash>'],
    }

    unix_keydefs = {
        '<<expand-word>>': ['<Meta-slash>'],
    }

    menudefs = [
        ('edit', [
            ('E_xpand word', '<<expand-word>>'),
         ]),
    ]

    wordchars = string.letters + string.digits + "_"

    def __init__(self, editwin):
        self.text = editwin.text
        self.text.wordlist = None # XXX what is this?
        self.state = None

    def expand_word_event(self, event):
        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.text.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.text.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):
        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):
        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:]