diff -r d86214c98a9c Lib/idlelib/EditorWindow.py
--- a/Lib/idlelib/EditorWindow.py	Wed Jun 18 23:07:46 2014 -0400
+++ b/Lib/idlelib/EditorWindow.py	Thu Jun 19 18:40:07 2014 +0530
@@ -13,6 +13,7 @@
 import webbrowser
 
 from idlelib.MultiCall import MultiCallCreator
+from idlelib.LineNumber import LineNumberCanvas, Text
 from idlelib import idlever
 from idlelib import WindowList
 from idlelib import SearchDialog
@@ -227,6 +228,10 @@
 vbar['command'] = text.yview
 vbar.pack(side=RIGHT, fill=Y)
 text['yscrollcommand'] = vbar.set
+ if self.__class__.__name__ != 'PyShell':
+ self.linenumber_canvas = LineNumberCanvas(text_frame)
+ self.linenumber_canvas.attach(text=self.text, side=LEFT, fill=Y)
+
 fontWeight = 'normal'
 if idleConf.GetOption('main', 'EditorWindow', 'font-bold', type='bool'):
 fontWeight='bold'
diff -r d86214c98a9c Lib/idlelib/LineNumber.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Lib/idlelib/LineNumber.py	Thu Jun 19 18:40:07 2014 +0530
@@ -0,0 +1,72 @@
+import tkinter as tk
+
+class LineNumberCanvas(tk.Canvas):
+
+ def __init__(self, *args, **kwargs):
+ tk.Canvas.__init__(self, *args, **kwargs)
+
+ def attach(self, text, *arg, **kwargs):
+ self.text = text
+ self.text.bind('<<changed>>', self.re_render)
+ self.text.bind('<configure>', self.re_render)
+ self.number_of_digits = 0
+ self.pack(*arg, **kwargs)
+
+ def detach(self):
+ pass
+
+ def re_render(self, event):
+ """Re-render the line canvas"""
+ self.delete('all')
+ number_of_digits = len(self.text.index('end').split('.')[0])
+ if self.number_of_digits != number_of_digits:
+ self.number_of_digits = number_of_digits
+ self['width'] = self.number_of_digits * 8
+
+ linenum = int(self.text.index('@0,0').split('.')[0])
+ while True:
+ dline = self.text.tk.call(self.text, 'dlineinfo', '%d.0' % linenum)
+ if not dline:
+ break
+ y, height = dline[1], dline[4]
+ self.create_text(
+ self['width'], y + height * 0.75, anchor="e", text=linenum)
+ linenum += 1
+
+
+class Text(tk.Text):
+ """
+ Modified Text widget to support custom <<changed>> virtual event 
+ to be genereated when the following actions take place:
+ insert, delete, replace, cursor position change and scroll.
+ The original event is re-generated.
+ """
+
+ def __init__(self, *args, **kwargs):
+ tk.Text.__init__(self, *args, **kwargs)
+ self.tk.eval("""
+ proc widget_interceptor {widget command args} {
+
+ set orig_call [uplevel [linsert $args 0 $command]]
+
+ if {
+ ([lindex $args 0] == "insert") &#124;&#124;
+ ([lindex $args 0] == "delete") &#124;&#124;
+ ([lindex $args 0] == "replace") &#124;&#124;
+ ([lrange $args 0 2] == {mark set insert}) &#124;&#124;
+ ([lrange $args 0 1] == {xview moveto}) &#124;&#124;
+ ([lrange $args 0 1] == {xview scroll}) &#124;&#124;
+ ([lrange $args 0 1] == {yview moveto}) &#124;&#124;
+ ([lrange $args 0 1] == {yview scroll})} {
+
+ event generate $widget <<changed>> -when tail
+ }
+
+ #return original command
+ return $orig_call
+ }
+ """)
+ self.tk.eval("""
+ rename {widget} new_{widget}
+ interp alias {{}} ::{widget} {{}} widget_interceptor {widget} new_{widget}
+ """.format(widget=str(self)))
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://bugs.python.org/file35689/line-numbering-v1.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://bugs.python.org/file35689/line-numbering-v1.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>