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1 | 1 | # encoding: utf-8 |
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2 | 2 | """ |
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3 | 3 | Prefiltering components. |
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4 | 4 | |
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5 | 5 | Prefilters transform user input before it is exec'd by Python. These |
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6 | 6 | transforms are used to implement additional syntax such as !ls and %magic. |
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7 | 7 | |
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8 | 8 | Authors: |
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9 | 9 | |
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10 | 10 | * Brian Granger |
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11 | 11 | * Fernando Perez |
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12 | 12 | * Dan Milstein |
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13 | 13 | * Ville Vainio |
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14 | 14 | """ |
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15 | 15 | |
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16 | 16 | #----------------------------------------------------------------------------- |
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17 | 17 | # Copyright (C) 2008-2009 The IPython Development Team |
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18 | 18 | # |
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19 | 19 | # Distributed under the terms of the BSD License. The full license is in |
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20 | 20 | # the file COPYING, distributed as part of this software. |
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21 | 21 | #----------------------------------------------------------------------------- |
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22 | 22 | |
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23 | 23 | #----------------------------------------------------------------------------- |
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24 | 24 | # Imports |
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25 | 25 | #----------------------------------------------------------------------------- |
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26 | 26 | |
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27 | 27 | import __builtin__ |
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28 | 28 | import codeop |
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29 | 29 | import re |
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30 | 30 | |
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31 | 31 | from IPython.core.alias import AliasManager |
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32 | 32 | from IPython.core.autocall import IPyAutocall |
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33 | 33 | from IPython.config.configurable import Configurable |
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34 | 34 | from IPython.core.macro import Macro |
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35 | 35 | from IPython.core.splitinput import split_user_input, LineInfo |
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36 | 36 | from IPython.core import page |
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37 | 37 | |
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38 | 38 | from IPython.utils.traitlets import List, Int, Any, Unicode, CBool, Bool, Instance |
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39 | 39 | from IPython.utils.text import make_quoted_expr |
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40 | 40 | from IPython.utils.autoattr import auto_attr |
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41 | 41 | |
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42 | 42 | #----------------------------------------------------------------------------- |
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43 | 43 | # Global utilities, errors and constants |
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44 | 44 | #----------------------------------------------------------------------------- |
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45 | 45 | |
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46 | 46 | # Warning, these cannot be changed unless various regular expressions |
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47 | 47 | # are updated in a number of places. Not great, but at least we told you. |
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48 | 48 | ESC_SHELL = '!' |
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49 | 49 | ESC_SH_CAP = '!!' |
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50 | 50 | ESC_HELP = '?' |
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51 | 51 | ESC_MAGIC = '%' |
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52 | 52 | ESC_QUOTE = ',' |
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53 | 53 | ESC_QUOTE2 = ';' |
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54 | 54 | ESC_PAREN = '/' |
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55 | 55 | |
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56 | 56 | |
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57 | 57 | class PrefilterError(Exception): |
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58 | 58 | pass |
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59 | 59 | |
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60 | 60 | |
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61 | 61 | # RegExp to identify potential function names |
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62 | 62 | re_fun_name = re.compile(r'[a-zA-Z_]([a-zA-Z0-9_.]*) *$') |
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63 | 63 | |
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64 | 64 | # RegExp to exclude strings with this start from autocalling. In |
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65 | 65 | # particular, all binary operators should be excluded, so that if foo is |
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66 | 66 | # callable, foo OP bar doesn't become foo(OP bar), which is invalid. The |
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67 | 67 | # characters '!=()' don't need to be checked for, as the checkPythonChars |
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68 | 68 | # routine explicitely does so, to catch direct calls and rebindings of |
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69 | 69 | # existing names. |
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70 | 70 | |
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71 | 71 | # Warning: the '-' HAS TO BE AT THE END of the first group, otherwise |
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72 | 72 | # it affects the rest of the group in square brackets. |
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73 | 73 | re_exclude_auto = re.compile(r'^[,&^\|\*/\+-]' |
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74 | 74 | r'|^is |^not |^in |^and |^or ') |
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75 | 75 | |
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76 | 76 | # try to catch also methods for stuff in lists/tuples/dicts: off |
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77 | 77 | # (experimental). For this to work, the line_split regexp would need |
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78 | 78 | # to be modified so it wouldn't break things at '['. That line is |
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79 | 79 | # nasty enough that I shouldn't change it until I can test it _well_. |
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80 | 80 | #self.re_fun_name = re.compile (r'[a-zA-Z_]([a-zA-Z0-9_.\[\]]*) ?$') |
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81 | 81 | |
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82 | 82 | |
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83 | 83 | # Handler Check Utilities |
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84 | 84 | def is_shadowed(identifier, ip): |
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85 | 85 | """Is the given identifier defined in one of the namespaces which shadow |
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86 | 86 | the alias and magic namespaces? Note that an identifier is different |
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87 | 87 | than ifun, because it can not contain a '.' character.""" |
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88 | 88 | # This is much safer than calling ofind, which can change state |
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89 | 89 | return (identifier in ip.user_ns \ |
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90 | 90 | or identifier in ip.internal_ns \ |
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91 | 91 | or identifier in ip.ns_table['builtin']) |
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92 | 92 | |
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93 | 93 | |
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94 | 94 | #----------------------------------------------------------------------------- |
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95 | 95 | # Main Prefilter manager |
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96 | 96 | #----------------------------------------------------------------------------- |
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97 | 97 | |
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98 | 98 | |
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99 | 99 | class PrefilterManager(Configurable): |
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100 | 100 | """Main prefilter component. |
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101 | 101 | |
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102 | 102 | The IPython prefilter is run on all user input before it is run. The |
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103 | 103 | prefilter consumes lines of input and produces transformed lines of |
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104 | 104 | input. |
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105 | 105 | |
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106 | 106 | The iplementation consists of two phases: |
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107 | 107 | |
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108 | 108 | 1. Transformers |
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109 | 109 | 2. Checkers and handlers |
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110 | 110 | |
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111 | 111 | Over time, we plan on deprecating the checkers and handlers and doing |
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112 | 112 | everything in the transformers. |
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113 | 113 | |
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114 | 114 | The transformers are instances of :class:`PrefilterTransformer` and have |
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115 | 115 | a single method :meth:`transform` that takes a line and returns a |
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116 | 116 | transformed line. The transformation can be accomplished using any |
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117 | 117 | tool, but our current ones use regular expressions for speed. We also |
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118 | 118 | ship :mod:`pyparsing` in :mod:`IPython.external` for use in transformers. |
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119 | 119 | |
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120 | 120 | After all the transformers have been run, the line is fed to the checkers, |
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121 | 121 | which are instances of :class:`PrefilterChecker`. The line is passed to |
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122 | 122 | the :meth:`check` method, which either returns `None` or a |
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123 | 123 | :class:`PrefilterHandler` instance. If `None` is returned, the other |
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124 | 124 | checkers are tried. If an :class:`PrefilterHandler` instance is returned, |
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125 | 125 | the line is passed to the :meth:`handle` method of the returned |
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126 | 126 | handler and no further checkers are tried. |
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127 | 127 | |
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128 | 128 | Both transformers and checkers have a `priority` attribute, that determines |
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129 | 129 | the order in which they are called. Smaller priorities are tried first. |
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130 | 130 | |
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131 | 131 | Both transformers and checkers also have `enabled` attribute, which is |
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132 | 132 | a boolean that determines if the instance is used. |
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133 | 133 | |
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134 | 134 | Users or developers can change the priority or enabled attribute of |
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135 | 135 | transformers or checkers, but they must call the :meth:`sort_checkers` |
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136 | 136 | or :meth:`sort_transformers` method after changing the priority. |
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137 | 137 | """ |
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138 | 138 | |
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139 | 139 | multi_line_specials = CBool(True, config=True) |
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140 | 140 | shell = Instance('IPython.core.interactiveshell.InteractiveShellABC') |
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141 | 141 | |
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142 | 142 | def __init__(self, shell=None, config=None): |
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143 | 143 | super(PrefilterManager, self).__init__(shell=shell, config=config) |
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144 | 144 | self.shell = shell |
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145 | 145 | self.init_transformers() |
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146 | 146 | self.init_handlers() |
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147 | 147 | self.init_checkers() |
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148 | 148 | |
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149 | 149 | #------------------------------------------------------------------------- |
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150 | 150 | # API for managing transformers |
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151 | 151 | #------------------------------------------------------------------------- |
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152 | 152 | |
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153 | 153 | def init_transformers(self): |
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154 | 154 | """Create the default transformers.""" |
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155 | 155 | self._transformers = [] |
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156 | 156 | for transformer_cls in _default_transformers: |
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157 | 157 | transformer_cls( |
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158 | 158 | shell=self.shell, prefilter_manager=self, config=self.config |
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159 | 159 | ) |
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160 | 160 | |
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161 | 161 | def sort_transformers(self): |
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162 | 162 | """Sort the transformers by priority. |
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163 | 163 | |
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164 | 164 | This must be called after the priority of a transformer is changed. |
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165 | 165 | The :meth:`register_transformer` method calls this automatically. |
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166 | 166 | """ |
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167 | 167 | self._transformers.sort(key=lambda x: x.priority) |
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168 | 168 | |
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169 | 169 | @property |
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170 | 170 | def transformers(self): |
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171 | 171 | """Return a list of checkers, sorted by priority.""" |
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172 | 172 | return self._transformers |
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173 | 173 | |
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174 | 174 | def register_transformer(self, transformer): |
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175 | 175 | """Register a transformer instance.""" |
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176 | 176 | if transformer not in self._transformers: |
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177 | 177 | self._transformers.append(transformer) |
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178 | 178 | self.sort_transformers() |
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179 | 179 | |
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180 | 180 | def unregister_transformer(self, transformer): |
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181 | 181 | """Unregister a transformer instance.""" |
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182 | 182 | if transformer in self._transformers: |
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183 | 183 | self._transformers.remove(transformer) |
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184 | 184 | |
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185 | 185 | #------------------------------------------------------------------------- |
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186 | 186 | # API for managing checkers |
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187 | 187 | #------------------------------------------------------------------------- |
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188 | 188 | |
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189 | 189 | def init_checkers(self): |
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190 | 190 | """Create the default checkers.""" |
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191 | 191 | self._checkers = [] |
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192 | 192 | for checker in _default_checkers: |
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193 | 193 | checker( |
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194 | 194 | shell=self.shell, prefilter_manager=self, config=self.config |
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195 | 195 | ) |
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196 | 196 | |
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197 | 197 | def sort_checkers(self): |
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198 | 198 | """Sort the checkers by priority. |
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199 | 199 | |
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200 | 200 | This must be called after the priority of a checker is changed. |
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201 | 201 | The :meth:`register_checker` method calls this automatically. |
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202 | 202 | """ |
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203 | 203 | self._checkers.sort(key=lambda x: x.priority) |
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204 | 204 | |
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205 | 205 | @property |
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206 | 206 | def checkers(self): |
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207 | 207 | """Return a list of checkers, sorted by priority.""" |
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208 | 208 | return self._checkers |
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209 | 209 | |
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210 | 210 | def register_checker(self, checker): |
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211 | 211 | """Register a checker instance.""" |
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212 | 212 | if checker not in self._checkers: |
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213 | 213 | self._checkers.append(checker) |
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214 | 214 | self.sort_checkers() |
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215 | 215 | |
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216 | 216 | def unregister_checker(self, checker): |
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217 | 217 | """Unregister a checker instance.""" |
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218 | 218 | if checker in self._checkers: |
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219 | 219 | self._checkers.remove(checker) |
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220 | 220 | |
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221 | 221 | #------------------------------------------------------------------------- |
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222 | 222 | # API for managing checkers |
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223 | 223 | #------------------------------------------------------------------------- |
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224 | 224 | |
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225 | 225 | def init_handlers(self): |
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226 | 226 | """Create the default handlers.""" |
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227 | 227 | self._handlers = {} |
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228 | 228 | self._esc_handlers = {} |
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229 | 229 | for handler in _default_handlers: |
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230 | 230 | handler( |
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231 | 231 | shell=self.shell, prefilter_manager=self, config=self.config |
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232 | 232 | ) |
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233 | 233 | |
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234 | 234 | @property |
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235 | 235 | def handlers(self): |
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236 | 236 | """Return a dict of all the handlers.""" |
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237 | 237 | return self._handlers |
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238 | 238 | |
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239 | 239 | def register_handler(self, name, handler, esc_strings): |
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240 | 240 | """Register a handler instance by name with esc_strings.""" |
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241 | 241 | self._handlers[name] = handler |
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242 | 242 | for esc_str in esc_strings: |
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243 | 243 | self._esc_handlers[esc_str] = handler |
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244 | 244 | |
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245 | 245 | def unregister_handler(self, name, handler, esc_strings): |
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246 | 246 | """Unregister a handler instance by name with esc_strings.""" |
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247 | 247 | try: |
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248 | 248 | del self._handlers[name] |
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249 | 249 | except KeyError: |
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250 | 250 | pass |
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251 | 251 | for esc_str in esc_strings: |
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252 | 252 | h = self._esc_handlers.get(esc_str) |
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253 | 253 | if h is handler: |
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254 | 254 | del self._esc_handlers[esc_str] |
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255 | 255 | |
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256 | 256 | def get_handler_by_name(self, name): |
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257 | 257 | """Get a handler by its name.""" |
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258 | 258 | return self._handlers.get(name) |
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259 | 259 | |
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260 | 260 | def get_handler_by_esc(self, esc_str): |
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261 | 261 | """Get a handler by its escape string.""" |
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262 | 262 | return self._esc_handlers.get(esc_str) |
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263 | 263 | |
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264 | 264 | #------------------------------------------------------------------------- |
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265 | 265 | # Main prefiltering API |
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266 | 266 | #------------------------------------------------------------------------- |
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267 | 267 | |
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268 | 268 | def prefilter_line_info(self, line_info): |
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269 | 269 | """Prefilter a line that has been converted to a LineInfo object. |
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270 | 270 | |
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271 | 271 | This implements the checker/handler part of the prefilter pipe. |
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272 | 272 | """ |
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273 | 273 | # print "prefilter_line_info: ", line_info |
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274 | 274 | handler = self.find_handler(line_info) |
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275 | 275 | return handler.handle(line_info) |
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276 | 276 | |
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277 | 277 | def find_handler(self, line_info): |
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278 | 278 | """Find a handler for the line_info by trying checkers.""" |
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279 | 279 | for checker in self.checkers: |
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280 | 280 | if checker.enabled: |
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281 | 281 | handler = checker.check(line_info) |
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282 | 282 | if handler: |
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283 | 283 | return handler |
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284 | 284 | return self.get_handler_by_name('normal') |
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285 | 285 | |
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286 | 286 | def transform_line(self, line, continue_prompt): |
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287 | 287 | """Calls the enabled transformers in order of increasing priority.""" |
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288 | 288 | for transformer in self.transformers: |
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289 | 289 | if transformer.enabled: |
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290 | 290 | line = transformer.transform(line, continue_prompt) |
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291 | 291 | return line |
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292 | 292 | |
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293 | 293 | def prefilter_line(self, line, continue_prompt=False): |
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294 | 294 | """Prefilter a single input line as text. |
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295 | 295 | |
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296 | 296 | This method prefilters a single line of text by calling the |
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297 | 297 | transformers and then the checkers/handlers. |
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298 | 298 | """ |
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299 | 299 | |
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300 | 300 | # print "prefilter_line: ", line, continue_prompt |
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301 | 301 | # All handlers *must* return a value, even if it's blank (''). |
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302 | 302 | |
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303 | 303 | # save the line away in case we crash, so the post-mortem handler can |
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304 | 304 | # record it |
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305 | 305 | self.shell._last_input_line = line |
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306 | 306 | |
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307 | 307 | if not line: |
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308 | 308 | # Return immediately on purely empty lines, so that if the user |
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309 | 309 | # previously typed some whitespace that started a continuation |
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310 | 310 | # prompt, he can break out of that loop with just an empty line. |
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311 | 311 | # This is how the default python prompt works. |
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312 | 312 | return '' |
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313 | 313 | |
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314 | 314 | # At this point, we invoke our transformers. |
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315 | 315 | if not continue_prompt or (continue_prompt and self.multi_line_specials): |
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316 | 316 | line = self.transform_line(line, continue_prompt) |
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317 | 317 | |
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318 | 318 | # Now we compute line_info for the checkers and handlers |
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319 | 319 | line_info = LineInfo(line, continue_prompt) |
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320 | 320 | |
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321 | 321 | # the input history needs to track even empty lines |
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322 | 322 | stripped = line.strip() |
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323 | 323 | |
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324 | 324 | normal_handler = self.get_handler_by_name('normal') |
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325 | 325 | if not stripped: |
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326 | 326 | if not continue_prompt: |
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327 | 327 | self.shell.displayhook.prompt_count -= 1 |
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328 | 328 | |
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329 | 329 | return normal_handler.handle(line_info) |
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330 | 330 | |
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331 | 331 | # special handlers are only allowed for single line statements |
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332 | 332 | if continue_prompt and not self.multi_line_specials: |
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333 | 333 | return normal_handler.handle(line_info) |
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334 | 334 | |
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335 | 335 | prefiltered = self.prefilter_line_info(line_info) |
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336 | 336 | # print "prefiltered line: %r" % prefiltered |
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337 | 337 | return prefiltered |
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338 | 338 | |
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339 | 339 | def prefilter_lines(self, lines, continue_prompt=False): |
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340 | 340 | """Prefilter multiple input lines of text. |
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341 | 341 | |
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342 | 342 | This is the main entry point for prefiltering multiple lines of |
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343 | 343 | input. This simply calls :meth:`prefilter_line` for each line of |
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344 | 344 | input. |
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345 | 345 | |
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346 | 346 | This covers cases where there are multiple lines in the user entry, |
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347 | 347 | which is the case when the user goes back to a multiline history |
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348 | 348 | entry and presses enter. |
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349 | 349 | """ |
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350 | 350 | llines = lines.rstrip('\n').split('\n') |
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351 | 351 | # We can get multiple lines in one shot, where multiline input 'blends' |
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352 | 352 | # into one line, in cases like recalling from the readline history |
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353 | 353 | # buffer. We need to make sure that in such cases, we correctly |
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354 | 354 | # communicate downstream which line is first and which are continuation |
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355 | 355 | # ones. |
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356 | 356 | if len(llines) > 1: |
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357 | 357 | out = '\n'.join([self.prefilter_line(line, lnum>0) |
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358 | 358 | for lnum, line in enumerate(llines) ]) |
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359 | 359 | else: |
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360 | 360 | out = self.prefilter_line(llines[0], continue_prompt) |
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361 | 361 | |
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362 | 362 | return out |
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363 | 363 | |
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364 | 364 | #----------------------------------------------------------------------------- |
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365 | 365 | # Prefilter transformers |
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366 | 366 | #----------------------------------------------------------------------------- |
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367 | 367 | |
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368 | 368 | |
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369 | 369 | class PrefilterTransformer(Configurable): |
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370 | 370 | """Transform a line of user input.""" |
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371 | 371 | |
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372 | 372 | priority = Int(100, config=True) |
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373 | 373 | # Transformers don't currently use shell or prefilter_manager, but as we |
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374 | 374 | # move away from checkers and handlers, they will need them. |
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375 | 375 | shell = Instance('IPython.core.interactiveshell.InteractiveShellABC') |
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376 | 376 | prefilter_manager = Instance('IPython.core.prefilter.PrefilterManager') |
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377 | 377 | enabled = Bool(True, config=True) |
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378 | 378 | |
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379 | 379 | def __init__(self, shell=None, prefilter_manager=None, config=None): |
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380 | 380 | super(PrefilterTransformer, self).__init__( |
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381 | 381 | shell=shell, prefilter_manager=prefilter_manager, config=config |
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382 | 382 | ) |
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383 | 383 | self.prefilter_manager.register_transformer(self) |
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384 | 384 | |
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385 | 385 | def transform(self, line, continue_prompt): |
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386 | 386 | """Transform a line, returning the new one.""" |
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387 | 387 | return None |
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388 | 388 | |
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389 | 389 | def __repr__(self): |
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390 | 390 | return "<%s(priority=%r, enabled=%r)>" % ( |
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391 | 391 | self.__class__.__name__, self.priority, self.enabled) |
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392 | 392 | |
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393 | 393 | |
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394 | 394 | _assign_system_re = re.compile(r'(?P<lhs>(\s*)([\w\.]+)((\s*,\s*[\w\.]+)*))' |
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395 | 395 | r'\s*=\s*!(?P<cmd>.*)') |
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396 | 396 | |
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397 | 397 | |
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398 | 398 | class AssignSystemTransformer(PrefilterTransformer): |
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399 | 399 | """Handle the `files = !ls` syntax.""" |
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400 | 400 | |
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401 | 401 | priority = Int(100, config=True) |
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402 | 402 | |
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403 | 403 | def transform(self, line, continue_prompt): |
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404 | 404 | m = _assign_system_re.match(line) |
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405 | 405 | if m is not None: |
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406 | 406 | cmd = m.group('cmd') |
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407 | 407 | lhs = m.group('lhs') |
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408 | 408 | expr = make_quoted_expr("sc =%s" % cmd) |
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409 | 409 | new_line = '%s = get_ipython().magic(%s)' % (lhs, expr) |
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410 | 410 | return new_line |
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411 | 411 | return line |
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412 | 412 | |
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413 | 413 | |
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414 | 414 | _assign_magic_re = re.compile(r'(?P<lhs>(\s*)([\w\.]+)((\s*,\s*[\w\.]+)*))' |
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415 | 415 | r'\s*=\s*%(?P<cmd>.*)') |
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416 | 416 | |
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417 | 417 | class AssignMagicTransformer(PrefilterTransformer): |
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418 | 418 | """Handle the `a = %who` syntax.""" |
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419 | 419 | |
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420 | 420 | priority = Int(200, config=True) |
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421 | 421 | |
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422 | 422 | def transform(self, line, continue_prompt): |
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423 | 423 | m = _assign_magic_re.match(line) |
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424 | 424 | if m is not None: |
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425 | 425 | cmd = m.group('cmd') |
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426 | 426 | lhs = m.group('lhs') |
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427 | 427 | expr = make_quoted_expr(cmd) |
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428 | 428 | new_line = '%s = get_ipython().magic(%s)' % (lhs, expr) |
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429 | 429 | return new_line |
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430 | 430 | return line |
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431 | 431 | |
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432 | 432 | |
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433 | 433 | _classic_prompt_re = re.compile(r'(^[ \t]*>>> |^[ \t]*\.\.\. )') |
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434 | 434 | |
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435 | 435 | class PyPromptTransformer(PrefilterTransformer): |
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436 | 436 | """Handle inputs that start with '>>> ' syntax.""" |
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437 | 437 | |
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438 | 438 | priority = Int(50, config=True) |
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439 | 439 | |
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440 | 440 | def transform(self, line, continue_prompt): |
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441 | 441 | |
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442 | 442 | if not line or line.isspace() or line.strip() == '...': |
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443 | 443 | # This allows us to recognize multiple input prompts separated by |
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444 | 444 | # blank lines and pasted in a single chunk, very common when |
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445 | 445 | # pasting doctests or long tutorial passages. |
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446 | 446 | return '' |
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447 | 447 | m = _classic_prompt_re.match(line) |
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448 | 448 | if m: |
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449 | 449 | return line[len(m.group(0)):] |
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450 | 450 | else: |
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451 | 451 | return line |
|
452 | 452 | |
|
453 | 453 | |
|
454 | 454 | _ipy_prompt_re = re.compile(r'(^[ \t]*In \[\d+\]: |^[ \t]*\ \ \ \.\.\.+: )') |
|
455 | 455 | |
|
456 | 456 | class IPyPromptTransformer(PrefilterTransformer): |
|
457 | 457 | """Handle inputs that start classic IPython prompt syntax.""" |
|
458 | 458 | |
|
459 | 459 | priority = Int(50, config=True) |
|
460 | 460 | |
|
461 | 461 | def transform(self, line, continue_prompt): |
|
462 | 462 | |
|
463 | 463 | if not line or line.isspace() or line.strip() == '...': |
|
464 | 464 | # This allows us to recognize multiple input prompts separated by |
|
465 | 465 | # blank lines and pasted in a single chunk, very common when |
|
466 | 466 | # pasting doctests or long tutorial passages. |
|
467 | 467 | return '' |
|
468 | 468 | m = _ipy_prompt_re.match(line) |
|
469 | 469 | if m: |
|
470 | 470 | return line[len(m.group(0)):] |
|
471 | 471 | else: |
|
472 | 472 | return line |
|
473 | 473 | |
|
474 | 474 | #----------------------------------------------------------------------------- |
|
475 | 475 | # Prefilter checkers |
|
476 | 476 | #----------------------------------------------------------------------------- |
|
477 | 477 | |
|
478 | 478 | |
|
479 | 479 | class PrefilterChecker(Configurable): |
|
480 | 480 | """Inspect an input line and return a handler for that line.""" |
|
481 | 481 | |
|
482 | 482 | priority = Int(100, config=True) |
|
483 | 483 | shell = Instance('IPython.core.interactiveshell.InteractiveShellABC') |
|
484 | 484 | prefilter_manager = Instance('IPython.core.prefilter.PrefilterManager') |
|
485 | 485 | enabled = Bool(True, config=True) |
|
486 | 486 | |
|
487 | 487 | def __init__(self, shell=None, prefilter_manager=None, config=None): |
|
488 | 488 | super(PrefilterChecker, self).__init__( |
|
489 | 489 | shell=shell, prefilter_manager=prefilter_manager, config=config |
|
490 | 490 | ) |
|
491 | 491 | self.prefilter_manager.register_checker(self) |
|
492 | 492 | |
|
493 | 493 | def check(self, line_info): |
|
494 | 494 | """Inspect line_info and return a handler instance or None.""" |
|
495 | 495 | return None |
|
496 | 496 | |
|
497 | 497 | def __repr__(self): |
|
498 | 498 | return "<%s(priority=%r, enabled=%r)>" % ( |
|
499 | 499 | self.__class__.__name__, self.priority, self.enabled) |
|
500 | 500 | |
|
501 | 501 | |
|
502 | 502 | class EmacsChecker(PrefilterChecker): |
|
503 | 503 | |
|
504 | 504 | priority = Int(100, config=True) |
|
505 | 505 | enabled = Bool(False, config=True) |
|
506 | 506 | |
|
507 | 507 | def check(self, line_info): |
|
508 | 508 | "Emacs ipython-mode tags certain input lines." |
|
509 | 509 | if line_info.line.endswith('# PYTHON-MODE'): |
|
510 | 510 | return self.prefilter_manager.get_handler_by_name('emacs') |
|
511 | 511 | else: |
|
512 | 512 | return None |
|
513 | 513 | |
|
514 | 514 | |
|
515 | 515 | class ShellEscapeChecker(PrefilterChecker): |
|
516 | 516 | |
|
517 | 517 | priority = Int(200, config=True) |
|
518 | 518 | |
|
519 | 519 | def check(self, line_info): |
|
520 | 520 | if line_info.line.lstrip().startswith(ESC_SHELL): |
|
521 | 521 | return self.prefilter_manager.get_handler_by_name('shell') |
|
522 | 522 | |
|
523 | 523 | |
|
524 | 524 | class MacroChecker(PrefilterChecker): |
|
525 | 525 | |
|
526 | 526 | priority = Int(250, config=True) |
|
527 | 527 | |
|
528 | 528 | def check(self, line_info): |
|
529 | 529 | obj = self.shell.user_ns.get(line_info.ifun) |
|
530 | 530 | if isinstance(obj, Macro): |
|
531 | 531 | return self.prefilter_manager.get_handler_by_name('macro') |
|
532 | 532 | else: |
|
533 | 533 | return None |
|
534 | 534 | |
|
535 | 535 | |
|
536 | 536 | class IPyAutocallChecker(PrefilterChecker): |
|
537 | 537 | |
|
538 | 538 | priority = Int(300, config=True) |
|
539 | 539 | |
|
540 | 540 | def check(self, line_info): |
|
541 | 541 | "Instances of IPyAutocall in user_ns get autocalled immediately" |
|
542 | 542 | obj = self.shell.user_ns.get(line_info.ifun, None) |
|
543 | 543 | if isinstance(obj, IPyAutocall): |
|
544 | 544 | obj.set_ip(self.shell) |
|
545 | 545 | return self.prefilter_manager.get_handler_by_name('auto') |
|
546 | 546 | else: |
|
547 | 547 | return None |
|
548 | 548 | |
|
549 | 549 | |
|
550 | 550 | class MultiLineMagicChecker(PrefilterChecker): |
|
551 | 551 | |
|
552 | 552 | priority = Int(400, config=True) |
|
553 | 553 | |
|
554 | 554 | def check(self, line_info): |
|
555 | 555 | "Allow ! and !! in multi-line statements if multi_line_specials is on" |
|
556 | 556 | # Note that this one of the only places we check the first character of |
|
557 | 557 | # ifun and *not* the pre_char. Also note that the below test matches |
|
558 | 558 | # both ! and !!. |
|
559 | 559 | if line_info.continue_prompt \ |
|
560 | 560 | and self.prefilter_manager.multi_line_specials: |
|
561 | 561 | if line_info.esc == ESC_MAGIC: |
|
562 | 562 | return self.prefilter_manager.get_handler_by_name('magic') |
|
563 | 563 | else: |
|
564 | 564 | return None |
|
565 | 565 | |
|
566 | 566 | |
|
567 | 567 | class EscCharsChecker(PrefilterChecker): |
|
568 | 568 | |
|
569 | 569 | priority = Int(500, config=True) |
|
570 | 570 | |
|
571 | 571 | def check(self, line_info): |
|
572 | 572 | """Check for escape character and return either a handler to handle it, |
|
573 | 573 | or None if there is no escape char.""" |
|
574 | 574 | if line_info.line[-1] == ESC_HELP \ |
|
575 | 575 | and line_info.esc != ESC_SHELL \ |
|
576 | 576 | and line_info.esc != ESC_SH_CAP: |
|
577 | 577 | # the ? can be at the end, but *not* for either kind of shell escape, |
|
578 | 578 | # because a ? can be a vaild final char in a shell cmd |
|
579 | 579 | return self.prefilter_manager.get_handler_by_name('help') |
|
580 | 580 | else: |
|
581 | 581 | if line_info.pre: |
|
582 | 582 | return None |
|
583 | 583 | # This returns None like it should if no handler exists |
|
584 | 584 | return self.prefilter_manager.get_handler_by_esc(line_info.esc) |
|
585 | 585 | |
|
586 | 586 | |
|
587 | 587 | class AssignmentChecker(PrefilterChecker): |
|
588 | 588 | |
|
589 | 589 | priority = Int(600, config=True) |
|
590 | 590 | |
|
591 | 591 | def check(self, line_info): |
|
592 | 592 | """Check to see if user is assigning to a var for the first time, in |
|
593 | 593 | which case we want to avoid any sort of automagic / autocall games. |
|
594 | 594 | |
|
595 | 595 | This allows users to assign to either alias or magic names true python |
|
596 | 596 | variables (the magic/alias systems always take second seat to true |
|
597 | 597 | python code). E.g. ls='hi', or ls,that=1,2""" |
|
598 | 598 | if line_info.the_rest: |
|
599 | 599 | if line_info.the_rest[0] in '=,': |
|
600 | 600 | return self.prefilter_manager.get_handler_by_name('normal') |
|
601 | 601 | else: |
|
602 | 602 | return None |
|
603 | 603 | |
|
604 | 604 | |
|
605 | 605 | class AutoMagicChecker(PrefilterChecker): |
|
606 | 606 | |
|
607 | 607 | priority = Int(700, config=True) |
|
608 | 608 | |
|
609 | 609 | def check(self, line_info): |
|
610 | 610 | """If the ifun is magic, and automagic is on, run it. Note: normal, |
|
611 | 611 | non-auto magic would already have been triggered via '%' in |
|
612 | 612 | check_esc_chars. This just checks for automagic. Also, before |
|
613 | 613 | triggering the magic handler, make sure that there is nothing in the |
|
614 | 614 | user namespace which could shadow it.""" |
|
615 | 615 | if not self.shell.automagic or not hasattr(self.shell,'magic_'+line_info.ifun): |
|
616 | 616 | return None |
|
617 | 617 | |
|
618 | 618 | # We have a likely magic method. Make sure we should actually call it. |
|
619 | 619 | if line_info.continue_prompt and not self.prefilter_manager.multi_line_specials: |
|
620 | 620 | return None |
|
621 | 621 | |
|
622 | 622 | head = line_info.ifun.split('.',1)[0] |
|
623 | 623 | if is_shadowed(head, self.shell): |
|
624 | 624 | return None |
|
625 | 625 | |
|
626 | 626 | return self.prefilter_manager.get_handler_by_name('magic') |
|
627 | 627 | |
|
628 | 628 | |
|
629 | 629 | class AliasChecker(PrefilterChecker): |
|
630 | 630 | |
|
631 | 631 | priority = Int(800, config=True) |
|
632 | 632 | |
|
633 | 633 | def check(self, line_info): |
|
634 | 634 | "Check if the initital identifier on the line is an alias." |
|
635 | 635 | # Note: aliases can not contain '.' |
|
636 | 636 | head = line_info.ifun.split('.',1)[0] |
|
637 | 637 | if line_info.ifun not in self.shell.alias_manager \ |
|
638 | 638 | or head not in self.shell.alias_manager \ |
|
639 | 639 | or is_shadowed(head, self.shell): |
|
640 | 640 | return None |
|
641 | 641 | |
|
642 | 642 | return self.prefilter_manager.get_handler_by_name('alias') |
|
643 | 643 | |
|
644 | 644 | |
|
645 | 645 | class PythonOpsChecker(PrefilterChecker): |
|
646 | 646 | |
|
647 | 647 | priority = Int(900, config=True) |
|
648 | 648 | |
|
649 | 649 | def check(self, line_info): |
|
650 | 650 | """If the 'rest' of the line begins with a function call or pretty much |
|
651 | 651 | any python operator, we should simply execute the line (regardless of |
|
652 | 652 | whether or not there's a possible autocall expansion). This avoids |
|
653 | 653 | spurious (and very confusing) geattr() accesses.""" |
|
654 | 654 | if line_info.the_rest and line_info.the_rest[0] in '!=()<>,+*/%^&|': |
|
655 | 655 | return self.prefilter_manager.get_handler_by_name('normal') |
|
656 | 656 | else: |
|
657 | 657 | return None |
|
658 | 658 | |
|
659 | 659 | |
|
660 | 660 | class AutocallChecker(PrefilterChecker): |
|
661 | 661 | |
|
662 | 662 | priority = Int(1000, config=True) |
|
663 | 663 | |
|
664 | 664 | def check(self, line_info): |
|
665 | 665 | "Check if the initial word/function is callable and autocall is on." |
|
666 | 666 | if not self.shell.autocall: |
|
667 | 667 | return None |
|
668 | 668 | |
|
669 | 669 | oinfo = line_info.ofind(self.shell) # This can mutate state via getattr |
|
670 | 670 | if not oinfo['found']: |
|
671 | 671 | return None |
|
672 | 672 | |
|
673 | 673 | if callable(oinfo['obj']) \ |
|
674 | 674 | and (not re_exclude_auto.match(line_info.the_rest)) \ |
|
675 | 675 | and re_fun_name.match(line_info.ifun): |
|
676 | 676 | return self.prefilter_manager.get_handler_by_name('auto') |
|
677 | 677 | else: |
|
678 | 678 | return None |
|
679 | 679 | |
|
680 | 680 | |
|
681 | 681 | #----------------------------------------------------------------------------- |
|
682 | 682 | # Prefilter handlers |
|
683 | 683 | #----------------------------------------------------------------------------- |
|
684 | 684 | |
|
685 | 685 | |
|
686 | 686 | class PrefilterHandler(Configurable): |
|
687 | 687 | |
|
688 | 688 | handler_name = Unicode('normal') |
|
689 | 689 | esc_strings = List([]) |
|
690 | 690 | shell = Instance('IPython.core.interactiveshell.InteractiveShellABC') |
|
691 | 691 | prefilter_manager = Instance('IPython.core.prefilter.PrefilterManager') |
|
692 | 692 | |
|
693 | 693 | def __init__(self, shell=None, prefilter_manager=None, config=None): |
|
694 | 694 | super(PrefilterHandler, self).__init__( |
|
695 | 695 | shell=shell, prefilter_manager=prefilter_manager, config=config |
|
696 | 696 | ) |
|
697 | 697 | self.prefilter_manager.register_handler( |
|
698 | 698 | self.handler_name, |
|
699 | 699 | self, |
|
700 | 700 | self.esc_strings |
|
701 | 701 | ) |
|
702 | 702 | |
|
703 | 703 | def handle(self, line_info): |
|
704 | 704 | # print "normal: ", line_info |
|
705 | 705 | """Handle normal input lines. Use as a template for handlers.""" |
|
706 | 706 | |
|
707 | 707 | # With autoindent on, we need some way to exit the input loop, and I |
|
708 | 708 | # don't want to force the user to have to backspace all the way to |
|
709 | 709 | # clear the line. The rule will be in this case, that either two |
|
710 | 710 | # lines of pure whitespace in a row, or a line of pure whitespace but |
|
711 | 711 | # of a size different to the indent level, will exit the input loop. |
|
712 | 712 | line = line_info.line |
|
713 | 713 | continue_prompt = line_info.continue_prompt |
|
714 | 714 | |
|
715 | 715 | if (continue_prompt and |
|
716 | 716 | self.shell.autoindent and |
|
717 | 717 | line.isspace() and |
|
718 | 718 | 0 < abs(len(line) - self.shell.indent_current_nsp) <= 2): |
|
719 | 719 | line = '' |
|
720 | 720 | |
|
721 | 721 | return line |
|
722 | 722 | |
|
723 | 723 | def __str__(self): |
|
724 | 724 | return "<%s(name=%s)>" % (self.__class__.__name__, self.handler_name) |
|
725 | 725 | |
|
726 | 726 | |
|
727 | 727 | class AliasHandler(PrefilterHandler): |
|
728 | 728 | |
|
729 | 729 | handler_name = Unicode('alias') |
|
730 | 730 | |
|
731 | 731 | def handle(self, line_info): |
|
732 | 732 | """Handle alias input lines. """ |
|
733 | 733 | transformed = self.shell.alias_manager.expand_aliases(line_info.ifun,line_info.the_rest) |
|
734 | 734 | # pre is needed, because it carries the leading whitespace. Otherwise |
|
735 | 735 | # aliases won't work in indented sections. |
|
736 | 736 | line_out = '%sget_ipython().system(%s)' % (line_info.pre_whitespace, |
|
737 | 737 | make_quoted_expr(transformed)) |
|
738 | 738 | |
|
739 | 739 | return line_out |
|
740 | 740 | |
|
741 | 741 | |
|
742 | 742 | class ShellEscapeHandler(PrefilterHandler): |
|
743 | 743 | |
|
744 | 744 | handler_name = Unicode('shell') |
|
745 | 745 | esc_strings = List([ESC_SHELL, ESC_SH_CAP]) |
|
746 | 746 | |
|
747 | 747 | def handle(self, line_info): |
|
748 | 748 | """Execute the line in a shell, empty return value""" |
|
749 | 749 | magic_handler = self.prefilter_manager.get_handler_by_name('magic') |
|
750 | 750 | |
|
751 | 751 | line = line_info.line |
|
752 | 752 | if line.lstrip().startswith(ESC_SH_CAP): |
|
753 | 753 | # rewrite LineInfo's line, ifun and the_rest to properly hold the |
|
754 | 754 | # call to %sx and the actual command to be executed, so |
|
755 | 755 | # handle_magic can work correctly. Note that this works even if |
|
756 | 756 | # the line is indented, so it handles multi_line_specials |
|
757 | 757 | # properly. |
|
758 | 758 | new_rest = line.lstrip()[2:] |
|
759 | 759 | line_info.line = '%ssx %s' % (ESC_MAGIC, new_rest) |
|
760 | 760 | line_info.ifun = 'sx' |
|
761 | 761 | line_info.the_rest = new_rest |
|
762 | 762 | return magic_handler.handle(line_info) |
|
763 | 763 | else: |
|
764 | 764 | cmd = line.lstrip().lstrip(ESC_SHELL) |
|
765 | 765 | line_out = '%sget_ipython().system(%s)' % (line_info.pre_whitespace, |
|
766 | 766 | make_quoted_expr(cmd)) |
|
767 | 767 | return line_out |
|
768 | 768 | |
|
769 | 769 | |
|
770 | 770 | class MacroHandler(PrefilterHandler): |
|
771 | 771 | handler_name = Unicode("macro") |
|
772 | 772 | |
|
773 | 773 | def handle(self, line_info): |
|
774 | 774 | obj = self.shell.user_ns.get(line_info.ifun) |
|
775 | 775 | pre_space = line_info.pre_whitespace |
|
776 | 776 | line_sep = "\n" + pre_space |
|
777 | 777 | return pre_space + line_sep.join(obj.value.splitlines()) |
|
778 | 778 | |
|
779 | 779 | |
|
780 | 780 | class MagicHandler(PrefilterHandler): |
|
781 | 781 | |
|
782 | 782 | handler_name = Unicode('magic') |
|
783 | 783 | esc_strings = List([ESC_MAGIC]) |
|
784 | 784 | |
|
785 | 785 | def handle(self, line_info): |
|
786 | 786 | """Execute magic functions.""" |
|
787 | 787 | ifun = line_info.ifun |
|
788 | 788 | the_rest = line_info.the_rest |
|
789 | 789 | cmd = '%sget_ipython().magic(%s)' % (line_info.pre_whitespace, |
|
790 | 790 | make_quoted_expr(ifun + " " + the_rest)) |
|
791 | 791 | return cmd |
|
792 | 792 | |
|
793 | 793 | |
|
794 | 794 | class AutoHandler(PrefilterHandler): |
|
795 | 795 | |
|
796 | 796 | handler_name = Unicode('auto') |
|
797 | 797 | esc_strings = List([ESC_PAREN, ESC_QUOTE, ESC_QUOTE2]) |
|
798 | 798 | |
|
799 | 799 | def handle(self, line_info): |
|
800 | 800 | """Handle lines which can be auto-executed, quoting if requested.""" |
|
801 | 801 | line = line_info.line |
|
802 | 802 | ifun = line_info.ifun |
|
803 | 803 | the_rest = line_info.the_rest |
|
804 | 804 | pre = line_info.pre |
|
805 | 805 | esc = line_info.esc |
|
806 | 806 | continue_prompt = line_info.continue_prompt |
|
807 | 807 | obj = line_info.ofind(self)['obj'] |
|
808 | 808 | #print 'pre <%s> ifun <%s> rest <%s>' % (pre,ifun,the_rest) # dbg |
|
809 | 809 | |
|
810 | 810 | # This should only be active for single-line input! |
|
811 | 811 | if continue_prompt: |
|
812 | 812 | return line |
|
813 | 813 | |
|
814 | 814 | force_auto = isinstance(obj, IPyAutocall) |
|
815 | auto_rewrite = getattr(obj, 'rewrite', True) | |
|
815 | ||
|
816 | # User objects sometimes raise exceptions on attribute access other | |
|
817 | # than AttributeError (we've seen it in the past), so it's safest to be | |
|
818 | # ultra-conservative here and catch all. | |
|
819 | try: | |
|
820 | auto_rewrite = obj.rewrite | |
|
821 | except Exception: | |
|
822 | auto_rewrite = True | |
|
816 | 823 | |
|
817 | 824 | if esc == ESC_QUOTE: |
|
818 | 825 | # Auto-quote splitting on whitespace |
|
819 | 826 | newcmd = '%s("%s")' % (ifun,'", "'.join(the_rest.split()) ) |
|
820 | 827 | elif esc == ESC_QUOTE2: |
|
821 | 828 | # Auto-quote whole string |
|
822 | 829 | newcmd = '%s("%s")' % (ifun,the_rest) |
|
823 | 830 | elif esc == ESC_PAREN: |
|
824 | 831 | newcmd = '%s(%s)' % (ifun,",".join(the_rest.split())) |
|
825 | 832 | else: |
|
826 | 833 | # Auto-paren. |
|
827 | 834 | # We only apply it to argument-less calls if the autocall |
|
828 | 835 | # parameter is set to 2. We only need to check that autocall is < |
|
829 | 836 | # 2, since this function isn't called unless it's at least 1. |
|
830 | 837 | if not the_rest and (self.shell.autocall < 2) and not force_auto: |
|
831 | 838 | newcmd = '%s %s' % (ifun,the_rest) |
|
832 | 839 | auto_rewrite = False |
|
833 | 840 | else: |
|
834 | 841 | if not force_auto and the_rest.startswith('['): |
|
835 | 842 | if hasattr(obj,'__getitem__'): |
|
836 | 843 | # Don't autocall in this case: item access for an object |
|
837 | 844 | # which is BOTH callable and implements __getitem__. |
|
838 | 845 | newcmd = '%s %s' % (ifun,the_rest) |
|
839 | 846 | auto_rewrite = False |
|
840 | 847 | else: |
|
841 | 848 | # if the object doesn't support [] access, go ahead and |
|
842 | 849 | # autocall |
|
843 | 850 | newcmd = '%s(%s)' % (ifun.rstrip(),the_rest) |
|
844 | 851 | elif the_rest.endswith(';'): |
|
845 | 852 | newcmd = '%s(%s);' % (ifun.rstrip(),the_rest[:-1]) |
|
846 | 853 | else: |
|
847 | 854 | newcmd = '%s(%s)' % (ifun.rstrip(), the_rest) |
|
848 | 855 | |
|
849 | 856 | if auto_rewrite: |
|
850 | 857 | self.shell.auto_rewrite_input(newcmd) |
|
851 | 858 | |
|
852 | 859 | return newcmd |
|
853 | 860 | |
|
854 | 861 | |
|
855 | 862 | class HelpHandler(PrefilterHandler): |
|
856 | 863 | |
|
857 | 864 | handler_name = Unicode('help') |
|
858 | 865 | esc_strings = List([ESC_HELP]) |
|
859 | 866 | |
|
860 | 867 | def handle(self, line_info): |
|
861 | 868 | """Try to get some help for the object. |
|
862 | 869 | |
|
863 | 870 | obj? or ?obj -> basic information. |
|
864 | 871 | obj?? or ??obj -> more details. |
|
865 | 872 | """ |
|
866 | 873 | normal_handler = self.prefilter_manager.get_handler_by_name('normal') |
|
867 | 874 | line = line_info.line |
|
868 | 875 | # We need to make sure that we don't process lines which would be |
|
869 | 876 | # otherwise valid python, such as "x=1 # what?" |
|
870 | 877 | try: |
|
871 | 878 | codeop.compile_command(line) |
|
872 | 879 | except SyntaxError: |
|
873 | 880 | # We should only handle as help stuff which is NOT valid syntax |
|
874 | 881 | if line[0]==ESC_HELP: |
|
875 | 882 | line = line[1:] |
|
876 | 883 | elif line[-1]==ESC_HELP: |
|
877 | 884 | line = line[:-1] |
|
878 | 885 | if line: |
|
879 | 886 | #print 'line:<%r>' % line # dbg |
|
880 | 887 | self.shell.magic_pinfo(line_info.ifun) |
|
881 | 888 | else: |
|
882 | 889 | self.shell.show_usage() |
|
883 | 890 | return '' # Empty string is needed here! |
|
884 | 891 | except: |
|
885 | 892 | raise |
|
886 | 893 | # Pass any other exceptions through to the normal handler |
|
887 | 894 | return normal_handler.handle(line_info) |
|
888 | 895 | else: |
|
889 | 896 | # If the code compiles ok, we should handle it normally |
|
890 | 897 | return normal_handler.handle(line_info) |
|
891 | 898 | |
|
892 | 899 | |
|
893 | 900 | class EmacsHandler(PrefilterHandler): |
|
894 | 901 | |
|
895 | 902 | handler_name = Unicode('emacs') |
|
896 | 903 | esc_strings = List([]) |
|
897 | 904 | |
|
898 | 905 | def handle(self, line_info): |
|
899 | 906 | """Handle input lines marked by python-mode.""" |
|
900 | 907 | |
|
901 | 908 | # Currently, nothing is done. Later more functionality can be added |
|
902 | 909 | # here if needed. |
|
903 | 910 | |
|
904 | 911 | # The input cache shouldn't be updated |
|
905 | 912 | return line_info.line |
|
906 | 913 | |
|
907 | 914 | |
|
908 | 915 | #----------------------------------------------------------------------------- |
|
909 | 916 | # Defaults |
|
910 | 917 | #----------------------------------------------------------------------------- |
|
911 | 918 | |
|
912 | 919 | |
|
913 | 920 | _default_transformers = [ |
|
914 | 921 | AssignSystemTransformer, |
|
915 | 922 | AssignMagicTransformer, |
|
916 | 923 | PyPromptTransformer, |
|
917 | 924 | IPyPromptTransformer, |
|
918 | 925 | ] |
|
919 | 926 | |
|
920 | 927 | _default_checkers = [ |
|
921 | 928 | EmacsChecker, |
|
922 | 929 | ShellEscapeChecker, |
|
923 | 930 | MacroChecker, |
|
924 | 931 | IPyAutocallChecker, |
|
925 | 932 | MultiLineMagicChecker, |
|
926 | 933 | EscCharsChecker, |
|
927 | 934 | AssignmentChecker, |
|
928 | 935 | AutoMagicChecker, |
|
929 | 936 | AliasChecker, |
|
930 | 937 | PythonOpsChecker, |
|
931 | 938 | AutocallChecker |
|
932 | 939 | ] |
|
933 | 940 | |
|
934 | 941 | _default_handlers = [ |
|
935 | 942 | PrefilterHandler, |
|
936 | 943 | AliasHandler, |
|
937 | 944 | ShellEscapeHandler, |
|
938 | 945 | MacroHandler, |
|
939 | 946 | MagicHandler, |
|
940 | 947 | AutoHandler, |
|
941 | 948 | HelpHandler, |
|
942 | 949 | EmacsHandler |
|
943 | 950 | ] |
@@ -1,68 +1,94 b'' | |||
|
1 | 1 | """Tests for input manipulation machinery.""" |
|
2 | 2 | |
|
3 | 3 | #----------------------------------------------------------------------------- |
|
4 | 4 | # Imports |
|
5 | 5 | #----------------------------------------------------------------------------- |
|
6 | 6 | import nose.tools as nt |
|
7 | 7 | |
|
8 | 8 | from IPython.testing import tools as tt, decorators as dec |
|
9 | 9 | from IPython.testing.globalipapp import get_ipython |
|
10 | 10 | |
|
11 | 11 | #----------------------------------------------------------------------------- |
|
12 | 12 | # Tests |
|
13 | 13 | #----------------------------------------------------------------------------- |
|
14 | 14 | ip = get_ipython() |
|
15 | 15 | |
|
16 | 16 | @dec.parametric |
|
17 | 17 | def test_prefilter(): |
|
18 | 18 | """Test user input conversions""" |
|
19 | 19 | |
|
20 | 20 | # pairs of (raw, expected correct) input |
|
21 | 21 | pairs = [ ('2+2','2+2'), |
|
22 | 22 | ('>>> 2+2','2+2'), |
|
23 | 23 | ('>>> # This is a comment\n' |
|
24 | 24 | '... 2+2', |
|
25 | 25 | '# This is a comment\n' |
|
26 | 26 | '2+2'), |
|
27 | 27 | # Some IPython input |
|
28 | 28 | ('In [1]: 1', '1'), |
|
29 | 29 | ('In [2]: for i in range(5):\n' |
|
30 | 30 | ' ...: print i,', |
|
31 | 31 | 'for i in range(5):\n' |
|
32 | 32 | ' print i,'), |
|
33 | 33 | ] |
|
34 | 34 | |
|
35 | 35 | for raw, correct in pairs: |
|
36 | 36 | yield nt.assert_equals(ip.prefilter(raw), correct) |
|
37 | 37 | |
|
38 | ||
|
38 | 39 | @dec.parametric |
|
39 | 40 | def test_autocall_binops(): |
|
40 | 41 | """See https://github.com/ipython/ipython/issues/81""" |
|
41 | 42 | ip.magic('autocall 2') |
|
42 | 43 | f = lambda x: x |
|
43 | 44 | ip.user_ns['f'] = f |
|
44 | 45 | try: |
|
45 | 46 | yield nt.assert_equals(ip.prefilter('f 1'),'f(1)') |
|
46 | 47 | for t in ['f +1', 'f -1']: |
|
47 | 48 | yield nt.assert_equals(ip.prefilter(t), t) |
|
48 | 49 | finally: |
|
49 | 50 | ip.magic('autocall 0') |
|
50 | 51 | del ip.user_ns['f'] |
|
51 | 52 | |
|
53 | ||
|
52 | 54 | @dec.parametric |
|
53 | def test_issue114(): | |
|
55 | def test_issue_114(): | |
|
54 | 56 | """Check that multiline string literals don't expand as magic |
|
55 |
see http://github.com/ipython/ipython/issues/ |
|
|
57 | see http://github.com/ipython/ipython/issues/114""" | |
|
56 | 58 | |
|
57 | 59 | template = '"""\n%s\n"""' |
|
58 | 60 | # Store the current value of multi_line_specials and turn it off before |
|
59 | 61 | # running test, since it could be true (case in which the test doesn't make |
|
60 | 62 | # sense, as multiline string literals *will* expand as magic in that case). |
|
61 | 63 | msp = ip.prefilter_manager.multi_line_specials |
|
62 | 64 | ip.prefilter_manager.multi_line_specials = False |
|
63 | 65 | try: |
|
64 | 66 | for mgk in ip.lsmagic(): |
|
65 | 67 | raw = template % mgk |
|
66 | 68 | yield nt.assert_equals(ip.prefilter(raw), raw) |
|
67 | 69 | finally: |
|
68 | 70 | ip.prefilter_manager.multi_line_specials = msp |
|
71 | ||
|
72 | ||
|
73 | def test_prefilter_attribute_errors(): | |
|
74 | """Capture exceptions thrown by user objects on attribute access. | |
|
75 | ||
|
76 | See http://github.com/ipython/ipython/issues/988.""" | |
|
77 | ||
|
78 | class X(object): | |
|
79 | def __getattr__(self, k): | |
|
80 | raise ValueError('broken object') | |
|
81 | def __call__(self, x): | |
|
82 | return x | |
|
83 | ||
|
84 | # Create a callable broken object | |
|
85 | ip.user_ns['x'] = X() | |
|
86 | ip.magic('autocall 2') | |
|
87 | try: | |
|
88 | # Even if x throws an attribute error when looking at its rewrite | |
|
89 | # attribute, we should not crash. So the test here is simply making | |
|
90 | # the prefilter call and not having an exception. | |
|
91 | ip.prefilter('x 1') | |
|
92 | finally: | |
|
93 | del ip.user_ns['x'] | |
|
94 | ip.magic('autocall 0') |
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