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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
"""Replace dialog for IDLE. Inherits SearchDialogBase for GUI.
Uses idlelib.SearchEngine for search capability.
Defines various replace related functions like replace, replace all,
replace+find.
"""
import re
from tkinter import StringVar, TclError
from idlelib.searchbase import SearchDialogBase
from idlelib import searchengine
def replace(text):
"""Returns a singleton ReplaceDialog instance.The single dialog
saves user entries and preferences across instances."""
root = text._root()
engine = searchengine.get(root)
if not hasattr(engine, "_replacedialog"):
engine._replacedialog = ReplaceDialog(root, engine)
dialog = engine._replacedialog
dialog.open(text)
class ReplaceDialog(SearchDialogBase):
title = "Replace Dialog"
icon = "Replace"
def __init__(self, root, engine):
SearchDialogBase.__init__(self, root, engine)
self.replvar = StringVar(root)
def open(self, text):
"""Display the replace dialog"""
SearchDialogBase.open(self, text)
try:
first = text.index("sel.first")
except TclError:
first = None
try:
last = text.index("sel.last")
except TclError:
last = None
first = first or text.index("insert")
last = last or first
self.show_hit(first, last)
self.ok = 1
def create_entries(self):
"""Create label and text entry widgets"""
SearchDialogBase.create_entries(self)
self.replent = self.make_entry("Replace with:", self.replvar)[0]
def create_command_buttons(self):
SearchDialogBase.create_command_buttons(self)
self.make_button("Find", self.find_it)
self.make_button("Replace", self.replace_it)
self.make_button("Replace+Find", self.default_command, 1)
self.make_button("Replace All", self.replace_all)
def find_it(self, event=None):
self.do_find(0)
def replace_it(self, event=None):
if self.do_find(self.ok):
self.do_replace()
def default_command(self, event=None):
"Replace and find next."
if self.do_find(self.ok):
if self.do_replace(): # Only find next match if replace succeeded.
# A bad re can cause it to fail.
self.do_find(0)
def _replace_expand(self, m, repl):
""" Helper function for expanding a regular expression
in the replace field, if needed. """
if self.engine.isre():
try:
new = m.expand(repl)
except re.error:
self.engine.report_error(repl, 'Invalid Replace Expression')
new = None
else:
new = repl
return new
def replace_all(self, event=None):
"""Replace all instances of patvar with replvar in text"""
prog = self.engine.getprog()
if not prog:
return
repl = self.replvar.get()
text = self.text
res = self.engine.search_text(text, prog)
if not res:
self.bell()
return
text.tag_remove("sel", "1.0", "end")
text.tag_remove("hit", "1.0", "end")
line = res[0]
col = res[1].start()
if self.engine.iswrap():
line = 1
col = 0
ok = 1
first = last = None
# XXX ought to replace circular instead of top-to-bottom when wrapping
text.undo_block_start()
while 1:
res = self.engine.search_forward(text, prog, line, col, 0, ok)
if not res:
break
line, m = res
chars = text.get("%d.0" % line, "%d.0" % (line+1))
orig = m.group()
new = self._replace_expand(m, repl)
if new is None:
break
i, j = m.span()
first = "%d.%d" % (line, i)
last = "%d.%d" % (line, j)
if new == orig:
text.mark_set("insert", last)
else:
text.mark_set("insert", first)
if first != last:
text.delete(first, last)
if new:
text.insert(first, new)
col = i + len(new)
ok = 0
text.undo_block_stop()
if first and last:
self.show_hit(first, last)
self.close()
def do_find(self, ok=0):
if not self.engine.getprog():
return False
text = self.text
res = self.engine.search_text(text, None, ok)
if not res:
self.bell()
return False
line, m = res
i, j = m.span()
first = "%d.%d" % (line, i)
last = "%d.%d" % (line, j)
self.show_hit(first, last)
self.ok = 1
return True
def do_replace(self):
prog = self.engine.getprog()
if not prog:
return False
text = self.text
try:
first = pos = text.index("sel.first")
last = text.index("sel.last")
except TclError:
pos = None
if not pos:
first = last = pos = text.index("insert")
line, col = searchengine.get_line_col(pos)
chars = text.get("%d.0" % line, "%d.0" % (line+1))
m = prog.match(chars, col)
if not prog:
return False
new = self._replace_expand(m, self.replvar.get())
if new is None:
return False
text.mark_set("insert", first)
text.undo_block_start()
if m.group():
text.delete(first, last)
if new:
text.insert(first, new)
text.undo_block_stop()
self.show_hit(first, text.index("insert"))
self.ok = 0
return True
def show_hit(self, first, last):
"""Highlight text from 'first' to 'last'.
'first', 'last' - Text indices"""
text = self.text
text.mark_set("insert", first)
text.tag_remove("sel", "1.0", "end")
text.tag_add("sel", first, last)
text.tag_remove("hit", "1.0", "end")
if first == last:
text.tag_add("hit", first)
else:
text.tag_add("hit", first, last)
text.see("insert")
text.update_idletasks()
def close(self, event=None):
SearchDialogBase.close(self, event)
self.text.tag_remove("hit", "1.0", "end")
def _replace_dialog(parent): # htest #
from tkinter import Toplevel, Text, END, SEL
from tkinter.ttk import Button
box = Toplevel(parent)
box.title("Test ReplaceDialog")
x, y = map(int, parent.geometry().split('+')[1:])
box.geometry("+%d+%d" % (x, y + 175))
# mock undo delegator methods
def undo_block_start():
pass
def undo_block_stop():
pass
text = Text(box, inactiveselectbackground='gray')
text.undo_block_start = undo_block_start
text.undo_block_stop = undo_block_stop
text.pack()
text.insert("insert","This is a sample sTring\nPlus MORE.")
text.focus_set()
def show_replace():
text.tag_add(SEL, "1.0", END)
replace(text)
text.tag_remove(SEL, "1.0", END)
button = Button(box, text="Replace", command=show_replace)
button.pack()
if __name__ == '__main__':
import unittest
unittest.main('idlelib.idle_test.test_replace',
verbosity=2, exit=False)
from idlelib.idle_test.htest import run
run(_replace_dialog)
|
