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1 | * The ``input_prefilter`` hook has been removed, as it was never | |||
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2 | actually used by the code. The input transformer system offers much | |||
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3 | more powerful APIs to work with input code. See | |||
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4 | :doc:`/config/inputtransforms` for details. |
@@ -1,224 +1,209 b'' | |||||
1 | """Hooks for IPython. |
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1 | """Hooks for IPython. | |
2 |
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2 | |||
3 | In Python, it is possible to overwrite any method of any object if you really |
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3 | In Python, it is possible to overwrite any method of any object if you really | |
4 | want to. But IPython exposes a few 'hooks', methods which are *designed* to |
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4 | want to. But IPython exposes a few 'hooks', methods which are *designed* to | |
5 | be overwritten by users for customization purposes. This module defines the |
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5 | be overwritten by users for customization purposes. This module defines the | |
6 | default versions of all such hooks, which get used by IPython if not |
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6 | default versions of all such hooks, which get used by IPython if not | |
7 | overridden by the user. |
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7 | overridden by the user. | |
8 |
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8 | |||
9 | Hooks are simple functions, but they should be declared with ``self`` as their |
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9 | Hooks are simple functions, but they should be declared with ``self`` as their | |
10 | first argument, because when activated they are registered into IPython as |
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10 | first argument, because when activated they are registered into IPython as | |
11 | instance methods. The self argument will be the IPython running instance |
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11 | instance methods. The self argument will be the IPython running instance | |
12 | itself, so hooks have full access to the entire IPython object. |
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12 | itself, so hooks have full access to the entire IPython object. | |
13 |
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13 | |||
14 | If you wish to define a new hook and activate it, you can make an :doc:`extension |
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14 | If you wish to define a new hook and activate it, you can make an :doc:`extension | |
15 | </config/extensions/index>` or a :ref:`startup script <startup_files>`. For |
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15 | </config/extensions/index>` or a :ref:`startup script <startup_files>`. For | |
16 | example, you could use a startup file like this:: |
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16 | example, you could use a startup file like this:: | |
17 |
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17 | |||
18 | import os |
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18 | import os | |
19 |
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19 | |||
20 | def calljed(self,filename, linenum): |
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20 | def calljed(self,filename, linenum): | |
21 | "My editor hook calls the jed editor directly." |
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21 | "My editor hook calls the jed editor directly." | |
22 | print "Calling my own editor, jed ..." |
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22 | print "Calling my own editor, jed ..." | |
23 | if os.system('jed +%d %s' % (linenum,filename)) != 0: |
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23 | if os.system('jed +%d %s' % (linenum,filename)) != 0: | |
24 | raise TryNext() |
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24 | raise TryNext() | |
25 |
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25 | |||
26 | def load_ipython_extension(ip): |
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26 | def load_ipython_extension(ip): | |
27 | ip.set_hook('editor', calljed) |
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27 | ip.set_hook('editor', calljed) | |
28 |
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28 | |||
29 | """ |
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29 | """ | |
30 |
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30 | |||
31 | #***************************************************************************** |
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31 | #***************************************************************************** | |
32 | # Copyright (C) 2005 Fernando Perez. <fperez@colorado.edu> |
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32 | # Copyright (C) 2005 Fernando Perez. <fperez@colorado.edu> | |
33 | # |
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33 | # | |
34 | # Distributed under the terms of the BSD License. The full license is in |
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34 | # Distributed under the terms of the BSD License. The full license is in | |
35 | # the file COPYING, distributed as part of this software. |
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35 | # the file COPYING, distributed as part of this software. | |
36 | #***************************************************************************** |
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36 | #***************************************************************************** | |
37 |
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37 | |||
38 | import os |
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38 | import os | |
39 | import subprocess |
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39 | import subprocess | |
40 | import sys |
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40 | import sys | |
41 |
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41 | |||
42 | from IPython.core.error import TryNext |
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42 | from IPython.core.error import TryNext | |
43 |
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43 | |||
44 | # List here all the default hooks. For now it's just the editor functions |
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44 | # List here all the default hooks. For now it's just the editor functions | |
45 | # but over time we'll move here all the public API for user-accessible things. |
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45 | # but over time we'll move here all the public API for user-accessible things. | |
46 |
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46 | |||
47 | __all__ = ['editor', 'fix_error_editor', 'synchronize_with_editor', |
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47 | __all__ = ['editor', 'fix_error_editor', 'synchronize_with_editor', | |
48 |
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48 | 'shutdown_hook', 'late_startup_hook', | |
49 | 'show_in_pager','pre_prompt_hook', |
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49 | 'show_in_pager','pre_prompt_hook', | |
50 | 'pre_run_code_hook', 'clipboard_get'] |
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50 | 'pre_run_code_hook', 'clipboard_get'] | |
51 |
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51 | |||
52 | def editor(self, filename, linenum=None, wait=True): |
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52 | def editor(self, filename, linenum=None, wait=True): | |
53 | """Open the default editor at the given filename and linenumber. |
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53 | """Open the default editor at the given filename and linenumber. | |
54 |
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54 | |||
55 | This is IPython's default editor hook, you can use it as an example to |
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55 | This is IPython's default editor hook, you can use it as an example to | |
56 | write your own modified one. To set your own editor function as the |
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56 | write your own modified one. To set your own editor function as the | |
57 | new editor hook, call ip.set_hook('editor',yourfunc).""" |
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57 | new editor hook, call ip.set_hook('editor',yourfunc).""" | |
58 |
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58 | |||
59 | # IPython configures a default editor at startup by reading $EDITOR from |
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59 | # IPython configures a default editor at startup by reading $EDITOR from | |
60 | # the environment, and falling back on vi (unix) or notepad (win32). |
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60 | # the environment, and falling back on vi (unix) or notepad (win32). | |
61 | editor = self.editor |
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61 | editor = self.editor | |
62 |
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62 | |||
63 | # marker for at which line to open the file (for existing objects) |
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63 | # marker for at which line to open the file (for existing objects) | |
64 | if linenum is None or editor=='notepad': |
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64 | if linenum is None or editor=='notepad': | |
65 | linemark = '' |
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65 | linemark = '' | |
66 | else: |
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66 | else: | |
67 | linemark = '+%d' % int(linenum) |
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67 | linemark = '+%d' % int(linenum) | |
68 |
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68 | |||
69 | # Enclose in quotes if necessary and legal |
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69 | # Enclose in quotes if necessary and legal | |
70 | if ' ' in editor and os.path.isfile(editor) and editor[0] != '"': |
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70 | if ' ' in editor and os.path.isfile(editor) and editor[0] != '"': | |
71 | editor = '"%s"' % editor |
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71 | editor = '"%s"' % editor | |
72 |
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72 | |||
73 | # Call the actual editor |
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73 | # Call the actual editor | |
74 | proc = subprocess.Popen('%s %s %s' % (editor, linemark, filename), |
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74 | proc = subprocess.Popen('%s %s %s' % (editor, linemark, filename), | |
75 | shell=True) |
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75 | shell=True) | |
76 | if wait and proc.wait() != 0: |
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76 | if wait and proc.wait() != 0: | |
77 | raise TryNext() |
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77 | raise TryNext() | |
78 |
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78 | |||
79 | import tempfile |
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79 | import tempfile | |
80 | def fix_error_editor(self,filename,linenum,column,msg): |
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80 | def fix_error_editor(self,filename,linenum,column,msg): | |
81 | """Open the editor at the given filename, linenumber, column and |
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81 | """Open the editor at the given filename, linenumber, column and | |
82 | show an error message. This is used for correcting syntax errors. |
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82 | show an error message. This is used for correcting syntax errors. | |
83 | The current implementation only has special support for the VIM editor, |
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83 | The current implementation only has special support for the VIM editor, | |
84 | and falls back on the 'editor' hook if VIM is not used. |
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84 | and falls back on the 'editor' hook if VIM is not used. | |
85 |
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85 | |||
86 | Call ip.set_hook('fix_error_editor',youfunc) to use your own function, |
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86 | Call ip.set_hook('fix_error_editor',youfunc) to use your own function, | |
87 | """ |
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87 | """ | |
88 | def vim_quickfix_file(): |
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88 | def vim_quickfix_file(): | |
89 | t = tempfile.NamedTemporaryFile() |
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89 | t = tempfile.NamedTemporaryFile() | |
90 | t.write('%s:%d:%d:%s\n' % (filename,linenum,column,msg)) |
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90 | t.write('%s:%d:%d:%s\n' % (filename,linenum,column,msg)) | |
91 | t.flush() |
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91 | t.flush() | |
92 | return t |
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92 | return t | |
93 | if os.path.basename(self.editor) != 'vim': |
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93 | if os.path.basename(self.editor) != 'vim': | |
94 | self.hooks.editor(filename,linenum) |
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94 | self.hooks.editor(filename,linenum) | |
95 | return |
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95 | return | |
96 | t = vim_quickfix_file() |
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96 | t = vim_quickfix_file() | |
97 | try: |
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97 | try: | |
98 | if os.system('vim --cmd "set errorformat=%f:%l:%c:%m" -q ' + t.name): |
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98 | if os.system('vim --cmd "set errorformat=%f:%l:%c:%m" -q ' + t.name): | |
99 | raise TryNext() |
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99 | raise TryNext() | |
100 | finally: |
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100 | finally: | |
101 | t.close() |
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101 | t.close() | |
102 |
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102 | |||
103 |
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103 | |||
104 | def synchronize_with_editor(self, filename, linenum, column): |
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104 | def synchronize_with_editor(self, filename, linenum, column): | |
105 | pass |
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105 | pass | |
106 |
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106 | |||
107 |
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107 | |||
108 | class CommandChainDispatcher: |
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108 | class CommandChainDispatcher: | |
109 | """ Dispatch calls to a chain of commands until some func can handle it |
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109 | """ Dispatch calls to a chain of commands until some func can handle it | |
110 |
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110 | |||
111 | Usage: instantiate, execute "add" to add commands (with optional |
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111 | Usage: instantiate, execute "add" to add commands (with optional | |
112 | priority), execute normally via f() calling mechanism. |
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112 | priority), execute normally via f() calling mechanism. | |
113 |
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113 | |||
114 | """ |
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114 | """ | |
115 | def __init__(self,commands=None): |
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115 | def __init__(self,commands=None): | |
116 | if commands is None: |
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116 | if commands is None: | |
117 | self.chain = [] |
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117 | self.chain = [] | |
118 | else: |
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118 | else: | |
119 | self.chain = commands |
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119 | self.chain = commands | |
120 |
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120 | |||
121 |
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121 | |||
122 | def __call__(self,*args, **kw): |
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122 | def __call__(self,*args, **kw): | |
123 | """ Command chain is called just like normal func. |
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123 | """ Command chain is called just like normal func. | |
124 |
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124 | |||
125 | This will call all funcs in chain with the same args as were given to |
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125 | This will call all funcs in chain with the same args as were given to | |
126 | this function, and return the result of first func that didn't raise |
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126 | this function, and return the result of first func that didn't raise | |
127 | TryNext""" |
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127 | TryNext""" | |
128 | last_exc = TryNext() |
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128 | last_exc = TryNext() | |
129 | for prio,cmd in self.chain: |
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129 | for prio,cmd in self.chain: | |
130 | #print "prio",prio,"cmd",cmd #dbg |
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130 | #print "prio",prio,"cmd",cmd #dbg | |
131 | try: |
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131 | try: | |
132 | return cmd(*args, **kw) |
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132 | return cmd(*args, **kw) | |
133 | except TryNext as exc: |
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133 | except TryNext as exc: | |
134 | last_exc = exc |
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134 | last_exc = exc | |
135 | # if no function will accept it, raise TryNext up to the caller |
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135 | # if no function will accept it, raise TryNext up to the caller | |
136 | raise last_exc |
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136 | raise last_exc | |
137 |
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137 | |||
138 | def __str__(self): |
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138 | def __str__(self): | |
139 | return str(self.chain) |
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139 | return str(self.chain) | |
140 |
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140 | |||
141 | def add(self, func, priority=0): |
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141 | def add(self, func, priority=0): | |
142 | """ Add a func to the cmd chain with given priority """ |
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142 | """ Add a func to the cmd chain with given priority """ | |
143 | self.chain.append((priority, func)) |
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143 | self.chain.append((priority, func)) | |
144 | self.chain.sort(key=lambda x: x[0]) |
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144 | self.chain.sort(key=lambda x: x[0]) | |
145 |
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145 | |||
146 | def __iter__(self): |
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146 | def __iter__(self): | |
147 | """ Return all objects in chain. |
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147 | """ Return all objects in chain. | |
148 |
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148 | |||
149 | Handy if the objects are not callable. |
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149 | Handy if the objects are not callable. | |
150 | """ |
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150 | """ | |
151 | return iter(self.chain) |
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151 | return iter(self.chain) | |
152 |
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152 | |||
153 |
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153 | |||
154 | def input_prefilter(self,line): |
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155 | """ Default input prefilter |
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156 |
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157 | This returns the line as unchanged, so that the interpreter |
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158 | knows that nothing was done and proceeds with "classic" prefiltering |
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159 | (%magics, !shell commands etc.). |
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160 |
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161 | Note that leading whitespace is not passed to this hook. Prefilter |
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162 | can't alter indentation. |
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163 |
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164 | """ |
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165 | #print "attempt to rewrite",line #dbg |
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166 | return line |
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167 |
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168 |
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169 | def shutdown_hook(self): |
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154 | def shutdown_hook(self): | |
170 | """ default shutdown hook |
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155 | """ default shutdown hook | |
171 |
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156 | |||
172 | Typically, shotdown hooks should raise TryNext so all shutdown ops are done |
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157 | Typically, shotdown hooks should raise TryNext so all shutdown ops are done | |
173 | """ |
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158 | """ | |
174 |
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159 | |||
175 | #print "default shutdown hook ok" # dbg |
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160 | #print "default shutdown hook ok" # dbg | |
176 | return |
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161 | return | |
177 |
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162 | |||
178 |
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163 | |||
179 | def late_startup_hook(self): |
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164 | def late_startup_hook(self): | |
180 | """ Executed after ipython has been constructed and configured |
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165 | """ Executed after ipython has been constructed and configured | |
181 |
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166 | |||
182 | """ |
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167 | """ | |
183 | #print "default startup hook ok" # dbg |
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168 | #print "default startup hook ok" # dbg | |
184 |
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169 | |||
185 |
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170 | |||
186 | def show_in_pager(self,s): |
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171 | def show_in_pager(self,s): | |
187 | """ Run a string through pager """ |
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172 | """ Run a string through pager """ | |
188 | # raising TryNext here will use the default paging functionality |
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173 | # raising TryNext here will use the default paging functionality | |
189 | raise TryNext |
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174 | raise TryNext | |
190 |
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175 | |||
191 |
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176 | |||
192 | def pre_prompt_hook(self): |
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177 | def pre_prompt_hook(self): | |
193 | """ Run before displaying the next prompt |
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178 | """ Run before displaying the next prompt | |
194 |
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179 | |||
195 | Use this e.g. to display output from asynchronous operations (in order |
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180 | Use this e.g. to display output from asynchronous operations (in order | |
196 | to not mess up text entry) |
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181 | to not mess up text entry) | |
197 | """ |
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182 | """ | |
198 |
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183 | |||
199 | return None |
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184 | return None | |
200 |
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185 | |||
201 |
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186 | |||
202 | def pre_run_code_hook(self): |
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187 | def pre_run_code_hook(self): | |
203 | """ Executed before running the (prefiltered) code in IPython """ |
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188 | """ Executed before running the (prefiltered) code in IPython """ | |
204 | return None |
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189 | return None | |
205 |
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190 | |||
206 |
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191 | |||
207 | def clipboard_get(self): |
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192 | def clipboard_get(self): | |
208 | """ Get text from the clipboard. |
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193 | """ Get text from the clipboard. | |
209 | """ |
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194 | """ | |
210 | from IPython.lib.clipboard import ( |
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195 | from IPython.lib.clipboard import ( | |
211 | osx_clipboard_get, tkinter_clipboard_get, |
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196 | osx_clipboard_get, tkinter_clipboard_get, | |
212 | win32_clipboard_get |
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197 | win32_clipboard_get | |
213 | ) |
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198 | ) | |
214 | if sys.platform == 'win32': |
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199 | if sys.platform == 'win32': | |
215 | chain = [win32_clipboard_get, tkinter_clipboard_get] |
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200 | chain = [win32_clipboard_get, tkinter_clipboard_get] | |
216 | elif sys.platform == 'darwin': |
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201 | elif sys.platform == 'darwin': | |
217 | chain = [osx_clipboard_get, tkinter_clipboard_get] |
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202 | chain = [osx_clipboard_get, tkinter_clipboard_get] | |
218 | else: |
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203 | else: | |
219 | chain = [tkinter_clipboard_get] |
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204 | chain = [tkinter_clipboard_get] | |
220 | dispatcher = CommandChainDispatcher() |
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205 | dispatcher = CommandChainDispatcher() | |
221 | for func in chain: |
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206 | for func in chain: | |
222 | dispatcher.add(func) |
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207 | dispatcher.add(func) | |
223 | text = dispatcher() |
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208 | text = dispatcher() | |
224 | return text |
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209 | return text |
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