Python code coverage for Tools/demo/redemo.py

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