Ned Deily | 3c6661a | 2012-08-18 12:21:17 -0700 | [diff] [blame] | 1 | #!/usr/bin/env python3 |
| 2 | |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 3 | """Basic regular expression demostration facility (Perl style syntax).""" |
| 4 | |
Benjamin Peterson | 903a65d | 2009-11-09 00:42:58 +0000 | [diff] [blame] | 5 | from tkinter import * |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 6 | import re |
| 7 | |
| 8 | class ReDemo: |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 9 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 10 | def __init__(self, master): |
| 11 | self.master = master |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 12 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 13 | self.promptdisplay = Label(self.master, anchor=W, |
| 14 | text="Enter a Perl-style regular expression:") |
| 15 | self.promptdisplay.pack(side=TOP, fill=X) |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 16 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 17 | self.regexdisplay = Entry(self.master) |
| 18 | self.regexdisplay.pack(fill=X) |
| 19 | self.regexdisplay.focus_set() |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 20 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 21 | self.addoptions() |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 22 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 23 | self.statusdisplay = Label(self.master, text="", anchor=W) |
| 24 | self.statusdisplay.pack(side=TOP, fill=X) |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 25 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 26 | self.labeldisplay = Label(self.master, anchor=W, |
| 27 | text="Enter a string to search:") |
| 28 | self.labeldisplay.pack(fill=X) |
| 29 | self.labeldisplay.pack(fill=X) |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 30 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 31 | self.showframe = Frame(master) |
| 32 | self.showframe.pack(fill=X, anchor=W) |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 33 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 34 | self.showvar = StringVar(master) |
| 35 | self.showvar.set("first") |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 36 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 37 | self.showfirstradio = Radiobutton(self.showframe, |
| 38 | text="Highlight first match", |
| 39 | variable=self.showvar, |
| 40 | value="first", |
| 41 | command=self.recompile) |
| 42 | self.showfirstradio.pack(side=LEFT) |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 43 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 44 | self.showallradio = Radiobutton(self.showframe, |
| 45 | text="Highlight all matches", |
| 46 | variable=self.showvar, |
| 47 | value="all", |
| 48 | command=self.recompile) |
| 49 | self.showallradio.pack(side=LEFT) |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 50 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 51 | self.stringdisplay = Text(self.master, width=60, height=4) |
| 52 | self.stringdisplay.pack(fill=BOTH, expand=1) |
| 53 | self.stringdisplay.tag_configure("hit", background="yellow") |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 54 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 55 | self.grouplabel = Label(self.master, text="Groups:", anchor=W) |
| 56 | self.grouplabel.pack(fill=X) |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 57 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 58 | self.grouplist = Listbox(self.master) |
| 59 | self.grouplist.pack(expand=1, fill=BOTH) |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 60 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 61 | self.regexdisplay.bind('<Key>', self.recompile) |
| 62 | self.stringdisplay.bind('<Key>', self.reevaluate) |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 63 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 64 | self.compiled = None |
| 65 | self.recompile() |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 66 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 67 | btags = self.regexdisplay.bindtags() |
| 68 | self.regexdisplay.bindtags(btags[1:] + btags[:1]) |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 69 | |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 70 | btags = self.stringdisplay.bindtags() |
| 71 | self.stringdisplay.bindtags(btags[1:] + btags[:1]) |
| 72 | |
| 73 | def addoptions(self): |
| 74 | self.frames = [] |
| 75 | self.boxes = [] |
| 76 | self.vars = [] |
| 77 | for name in ('IGNORECASE', |
| 78 | 'LOCALE', |
| 79 | 'MULTILINE', |
| 80 | 'DOTALL', |
| 81 | 'VERBOSE'): |
| 82 | if len(self.boxes) % 3 == 0: |
| 83 | frame = Frame(self.master) |
| 84 | frame.pack(fill=X) |
| 85 | self.frames.append(frame) |
| 86 | val = getattr(re, name) |
| 87 | var = IntVar() |
| 88 | box = Checkbutton(frame, |
| 89 | variable=var, text=name, |
| 90 | offvalue=0, onvalue=val, |
| 91 | command=self.recompile) |
| 92 | box.pack(side=LEFT) |
| 93 | self.boxes.append(box) |
| 94 | self.vars.append(var) |
| 95 | |
| 96 | def getflags(self): |
| 97 | flags = 0 |
| 98 | for var in self.vars: |
| 99 | flags = flags | var.get() |
| 100 | flags = flags |
| 101 | return flags |
| 102 | |
| 103 | def recompile(self, event=None): |
| 104 | try: |
| 105 | self.compiled = re.compile(self.regexdisplay.get(), |
| 106 | self.getflags()) |
| 107 | bg = self.promptdisplay['background'] |
| 108 | self.statusdisplay.config(text="", background=bg) |
Guido van Rossum | b940e11 | 2007-01-10 16:19:56 +0000 | [diff] [blame] | 109 | except re.error as msg: |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 110 | self.compiled = None |
| 111 | self.statusdisplay.config( |
| 112 | text="re.error: %s" % str(msg), |
| 113 | background="red") |
| 114 | self.reevaluate() |
| 115 | |
| 116 | def reevaluate(self, event=None): |
| 117 | try: |
| 118 | self.stringdisplay.tag_remove("hit", "1.0", END) |
| 119 | except TclError: |
| 120 | pass |
| 121 | try: |
| 122 | self.stringdisplay.tag_remove("hit0", "1.0", END) |
| 123 | except TclError: |
| 124 | pass |
| 125 | self.grouplist.delete(0, END) |
| 126 | if not self.compiled: |
| 127 | return |
| 128 | self.stringdisplay.tag_configure("hit", background="yellow") |
| 129 | self.stringdisplay.tag_configure("hit0", background="orange") |
| 130 | text = self.stringdisplay.get("1.0", END) |
| 131 | last = 0 |
| 132 | nmatches = 0 |
| 133 | while last <= len(text): |
| 134 | m = self.compiled.search(text, last) |
| 135 | if m is None: |
| 136 | break |
| 137 | first, last = m.span() |
| 138 | if last == first: |
| 139 | last = first+1 |
| 140 | tag = "hit0" |
| 141 | else: |
| 142 | tag = "hit" |
| 143 | pfirst = "1.0 + %d chars" % first |
| 144 | plast = "1.0 + %d chars" % last |
| 145 | self.stringdisplay.tag_add(tag, pfirst, plast) |
| 146 | if nmatches == 0: |
| 147 | self.stringdisplay.yview_pickplace(pfirst) |
| 148 | groups = list(m.groups()) |
| 149 | groups.insert(0, m.group()) |
| 150 | for i in range(len(groups)): |
Walter Dörwald | 70a6b49 | 2004-02-12 17:35:32 +0000 | [diff] [blame] | 151 | g = "%2d: %r" % (i, groups[i]) |
Tim Peters | 70c4378 | 2001-01-17 08:48:39 +0000 | [diff] [blame] | 152 | self.grouplist.insert(END, g) |
| 153 | nmatches = nmatches + 1 |
| 154 | if self.showvar.get() == "first": |
| 155 | break |
| 156 | |
| 157 | if nmatches == 0: |
| 158 | self.statusdisplay.config(text="(no match)", |
| 159 | background="yellow") |
| 160 | else: |
| 161 | self.statusdisplay.config(text="") |
Guido van Rossum | 70280b8 | 2000-10-06 17:37:12 +0000 | [diff] [blame] | 162 | |
| 163 | |
| 164 | # Main function, run when invoked as a stand-alone Python program. |
| 165 | |
| 166 | def main(): |
| 167 | root = Tk() |
| 168 | demo = ReDemo(root) |
| 169 | root.protocol('WM_DELETE_WINDOW', root.quit) |
| 170 | root.mainloop() |
| 171 | |
| 172 | if __name__ == '__main__': |
| 173 | main() |