Mercurial > cpython-lru_cache-weakref

annotate Lib/idlelib/ScriptBinding.py @ 87690:66c1c9f32567 default tip

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents e450e85e2075
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 """Extension to execute code outside the Python shell window.
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2
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3 This adds the following commands:
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4
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5 - Check module does a full syntax check of the current module.
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6 It also runs the tabnanny to catch any inconsistent tabs.
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7
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8 - Run module executes the module's code in the __main__ namespace. The window
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9 must have been saved previously. The module is added to sys.modules, and is
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10 also added to the __main__ namespace.
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11
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12 XXX GvR Redesign this interface (yet again) as follows:
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13
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14 - Present a dialog box for ``Run Module''
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15
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16 - Allow specify command line arguments in the dialog box
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17
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18 """
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19
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20 import os
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21 import re
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22 import string
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23 import tabnanny
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24 import tokenize
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25 import tkinter.messagebox as tkMessageBox
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26 from idlelib.EditorWindow import EditorWindow
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27 from idlelib import PyShell, IOBinding
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28
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29 from idlelib.configHandler import idleConf
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30 from idlelib import macosxSupport
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31
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32 indent_message = """Error: Inconsistent indentation detected!
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33
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34 1) Your indentation is outright incorrect (easy to fix), OR
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35
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36 2) Your indentation mixes tabs and spaces.
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38 To fix case 2, change all tabs to spaces by using Edit->Select All followed \
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39 by Format->Untabify Region and specify the number of columns used by each tab.
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40 """
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41
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42 class ScriptBinding:
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43
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44 menudefs = [
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45 ('run', [None,
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46 ('Check Module', '<<check-module>>'),
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47 ('Run Module', '<<run-module>>'), ]), ]
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48
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49 def __init__(self, editwin):
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50 self.editwin = editwin
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51 # Provide instance variables referenced by Debugger
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52 # XXX This should be done differently
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53 self.flist = self.editwin.flist
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54 self.root = self.editwin.root
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55
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56 if macosxSupport.runningAsOSXApp():
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57 self.editwin.text_frame.bind('<<run-module-event-2>>', self._run_module_event)
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58
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59 def check_module_event(self, event):
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60 filename = self.getfilename()
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61 if not filename:
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62 return 'break'
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63 if not self.checksyntax(filename):
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64 return 'break'
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65 if not self.tabnanny(filename):
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66 return 'break'
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67
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68 def tabnanny(self, filename):
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69 # XXX: tabnanny should work on binary files as well
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70 with tokenize.open(filename) as f:
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71 try:
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72 tabnanny.process_tokens(tokenize.generate_tokens(f.readline))
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73 except tokenize.TokenError as msg:
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74 msgtxt, (lineno, start) = msg
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75 self.editwin.gotoline(lineno)
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76 self.errorbox("Tabnanny Tokenizing Error",
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77 "Token Error: %s" % msgtxt)
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78 return False
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79 except tabnanny.NannyNag as nag:
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80 # The error messages from tabnanny are too confusing...
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81 self.editwin.gotoline(nag.get_lineno())
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82 self.errorbox("Tab/space error", indent_message)
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83 return False
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84 return True
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85
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86 def checksyntax(self, filename):
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87 self.shell = shell = self.flist.open_shell()
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88 saved_stream = shell.get_warning_stream()
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89 shell.set_warning_stream(shell.stderr)
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90 with open(filename, 'rb') as f:
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91 source = f.read()
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92 if b'\r' in source:
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93 source = source.replace(b'\r\n', b'\n')
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94 source = source.replace(b'\r', b'\n')
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95 if source and source[-1] != ord(b'\n'):
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96 source = source + b'\n'
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97 editwin = self.editwin
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98 text = editwin.text
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99 text.tag_remove("ERROR", "1.0", "end")
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100 try:
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101 # If successful, return the compiled code
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102 return compile(source, filename, "exec")
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103 except (SyntaxError, OverflowError, ValueError) as value:
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104 msg = getattr(value, 'msg', '') or value or "<no detail available>"
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105 lineno = getattr(value, 'lineno', '') or 1
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106 offset = getattr(value, 'offset', '') or 0
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107 if offset == 0:
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108 lineno += 1 #mark end of offending line
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109 pos = "0.0 + %d lines + %d chars" % (lineno-1, offset-1)
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110 editwin.colorize_syntax_error(text, pos)
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111 self.errorbox("SyntaxError", "%-20s" % msg)
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112 return False
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113 finally:
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114 shell.set_warning_stream(saved_stream)
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115
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116 def run_module_event(self, event):
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117 if macosxSupport.runningAsOSXApp():
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118 # Tk-Cocoa in MacOSX is broken until at least
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119 # Tk 8.5.9, and without this rather
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120 # crude workaround IDLE would hang when a user
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121 # tries to run a module using the keyboard shortcut
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122 # (the menu item works fine).
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123 self.editwin.text_frame.after(200,
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124 lambda: self.editwin.text_frame.event_generate('<<run-module-event-2>>'))
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125 return 'break'
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126 else:
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127 return self._run_module_event(event)
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128
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129 def _run_module_event(self, event):
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130 """Run the module after setting up the environment.
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131
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132 First check the syntax. If OK, make sure the shell is active and
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133 then transfer the arguments, set the run environment's working
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134 directory to the directory of the module being executed and also
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135 add that directory to its sys.path if not already included.
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136 """
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137
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138 filename = self.getfilename()
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139 if not filename:
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140 return 'break'
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141 code = self.checksyntax(filename)
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142 if not code:
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143 return 'break'
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144 if not self.tabnanny(filename):
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145 return 'break'
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146 interp = self.shell.interp
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147 if PyShell.use_subprocess:
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148 interp.restart_subprocess(with_cwd=False)
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149 dirname = os.path.dirname(filename)
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150 # XXX Too often this discards arguments the user just set...
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151 interp.runcommand("""if 1:
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152 __file__ = {filename!r}
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153 import sys as _sys
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154 from os.path import basename as _basename
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155 if (not _sys.argv or
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156 _basename(_sys.argv[0]) != _basename(__file__)):
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157 _sys.argv = [__file__]
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158 import os as _os
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159 _os.chdir({dirname!r})
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160 del _sys, _basename, _os
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161 \n""".format(filename=filename, dirname=dirname))
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162 interp.prepend_syspath(filename)
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163 # XXX KBK 03Jul04 When run w/o subprocess, runtime warnings still
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164 # go to __stderr__. With subprocess, they go to the shell.
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165 # Need to change streams in PyShell.ModifiedInterpreter.
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166 interp.runcode(code)
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167 return 'break'
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168
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169 def getfilename(self):
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170 """Get source filename. If not saved, offer to save (or create) file
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171
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172 The debugger requires a source file. Make sure there is one, and that
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173 the current version of the source buffer has been saved. If the user
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174 declines to save or cancels the Save As dialog, return None.
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175
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176 If the user has configured IDLE for Autosave, the file will be
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177 silently saved if it already exists and is dirty.
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178
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179 """
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180 filename = self.editwin.io.filename
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181 if not self.editwin.get_saved():
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182 autosave = idleConf.GetOption('main', 'General',
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183 'autosave', type='bool')
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184 if autosave and filename:
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185 self.editwin.io.save(None)
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186 else:
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187 confirm = self.ask_save_dialog()
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188 self.editwin.text.focus_set()
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189 if confirm:
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190 self.editwin.io.save(None)
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191 filename = self.editwin.io.filename
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192 else:
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193 filename = None
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194 return filename
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195
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196 def ask_save_dialog(self):
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197 msg = "Source Must Be Saved\n" + 5*' ' + "OK to Save?"
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198 confirm = tkMessageBox.askokcancel(title="Save Before Run or Check",
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199 message=msg,
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200 default=tkMessageBox.OK,
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201 master=self.editwin.text)
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202 return confirm
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203
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204 def errorbox(self, title, message):
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205 # XXX This should really be a function of EditorWindow...
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206 tkMessageBox.showerror(title, message, master=self.editwin.text)
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207 self.editwin.text.focus_set()