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1 | import abc | |
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2 | import re | |
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3 | ||
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4 | from IPython.core.splitinput import split_user_input, LineInfo | |
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5 | from IPython.core.inputsplitter import (ESC_SHELL, ESC_SH_CAP, ESC_HELP, | |
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6 | ESC_HELP2, ESC_MAGIC, ESC_MAGIC2, | |
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7 | ESC_QUOTE, ESC_QUOTE2, ESC_PAREN) | |
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8 | from IPython.core.inputsplitter import EscapedTransformer, _make_help_call, has_comment | |
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9 | ||
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10 | class InputTransformer(object): | |
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11 | __metaclass__ = abc.ABCMeta | |
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12 | ||
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13 | @abc.abstractmethod | |
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14 | def push(self, line): | |
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15 | pass | |
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16 | ||
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17 | @abc.abstractmethod | |
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18 | def reset(self): | |
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19 | pass | |
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20 | ||
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21 | class StatelessInputTransformer(InputTransformer): | |
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22 | """Decorator for a stateless input transformer implemented as a function.""" | |
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23 | def __init__(self, func): | |
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24 | self.func = func | |
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25 | ||
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26 | def push(self, line): | |
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27 | return self.func(line) | |
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28 | ||
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29 | def reset(self): | |
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30 | pass | |
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31 | ||
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32 | class CoroutineInputTransformer(InputTransformer): | |
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33 | """Decorator for an input transformer implemented as a coroutine.""" | |
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34 | def __init__(self, coro): | |
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35 | # Prime it | |
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36 | self.coro = coro() | |
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37 | next(self.coro) | |
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38 | ||
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39 | def push(self, line): | |
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40 | return self.coro.send(line) | |
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41 | ||
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42 | def reset(self): | |
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43 | self.coro.send(None) | |
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44 | ||
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45 | @CoroutineInputTransformer | |
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46 | def escaped_transformer(): | |
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47 | et = EscapedTransformer() | |
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48 | line = '' | |
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49 | while True: | |
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50 | line = (yield line) | |
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51 | if not line or line.isspace(): | |
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52 | continue | |
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53 | lineinf = LineInfo(line) | |
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54 | if lineinf.esc not in et.tr: | |
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55 | continue | |
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56 | ||
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57 | parts = [] | |
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58 | while line is not None: | |
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59 | parts.append(line.rstrip('\\')) | |
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60 | if not line.endswith('\\'): | |
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61 | break | |
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62 | line = (yield None) | |
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63 | ||
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64 | # Output | |
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65 | lineinf = LineInfo(' '.join(parts)) | |
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66 | line = et.tr[lineinf.esc](lineinf) | |
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67 | ||
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68 | _initial_space_re = re.compile(r'\s*') | |
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69 | ||
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70 | _help_end_re = re.compile(r"""(%{0,2} | |
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71 | [a-zA-Z_*][\w*]* # Variable name | |
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72 | (\.[a-zA-Z_*][\w*]*)* # .etc.etc | |
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73 | ) | |
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74 | (\?\??)$ # ? or ??""", | |
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75 | re.VERBOSE) | |
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76 | ||
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77 | @StatelessInputTransformer | |
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78 | def transform_help_end(line): | |
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79 | """Translate lines with ?/?? at the end""" | |
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80 | m = _help_end_re.search(line) | |
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81 | if m is None or has_comment(line): | |
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82 | return line | |
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83 | target = m.group(1) | |
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84 | esc = m.group(3) | |
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85 | lspace = _initial_space_re.match(line).group(0) | |
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86 | ||
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87 | # If we're mid-command, put it back on the next prompt for the user. | |
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88 | next_input = line.rstrip('?') if line.strip() != m.group(0) else None | |
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89 | ||
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90 | return _make_help_call(target, esc, lspace, next_input) | |
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91 | ||
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92 | ||
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93 | @CoroutineInputTransformer | |
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94 | def cellmagic(): | |
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95 | tpl = 'get_ipython().run_cell_magic(%r, %r, %r)' | |
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96 | line = '' | |
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97 | while True: | |
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98 | line = (yield line) | |
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99 | if not line.startswith(ESC_MAGIC2): | |
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100 | continue | |
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101 | ||
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102 | first = line | |
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103 | body = [] | |
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104 | line = (yield None) | |
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105 | while (line is not None) and (line.strip() != ''): | |
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106 | body.append(line) | |
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107 | line = (yield None) | |
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108 | ||
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109 | # Output | |
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110 | magic_name, _, first = first.partition(' ') | |
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111 | magic_name = magic_name.lstrip(ESC_MAGIC2) | |
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112 | line = tpl % (magic_name, first, '\n'.join(body)) |
@@ -0,0 +1,37 b'' | |||
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1 | import unittest | |
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2 | import nose.tools as nt | |
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3 | ||
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4 | from IPython.testing import tools as tt | |
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5 | from IPython.utils import py3compat | |
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6 | ||
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7 | from IPython.core import inputtransformer | |
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8 | from IPython.core.tests.test_inputsplitter import syntax | |
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9 | ||
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10 | def wrap_transform(transformer): | |
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11 | def transform(inp): | |
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12 | for line in inp: | |
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13 | res = transformer.push(line) | |
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14 | if res is not None: | |
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15 | return res | |
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16 | return transformer.push(None) | |
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17 | ||
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18 | return transform | |
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19 | ||
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20 | cellmagic_tests = [ | |
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21 | (['%%foo a'], "get_ipython().run_cell_magic('foo', 'a', '')"), | |
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22 | (['%%bar 123', 'hello', ''], "get_ipython().run_cell_magic('bar', '123', 'hello')"), | |
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23 | ] | |
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24 | ||
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25 | def test_transform_cellmagic(): | |
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26 | tt.check_pairs(wrap_transform(inputtransformer.cellmagic), cellmagic_tests) | |
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27 | ||
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28 | esctransform_tests = [(i, py3compat.u_format(o)) for i,o in [ | |
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29 | (['%pdef zip'], "get_ipython().magic({u}'pdef zip')"), | |
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30 | (['%abc def \\', 'ghi'], "get_ipython().magic({u}'abc def ghi')"), | |
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31 | ]] | |
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32 | ||
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33 | def test_transform_escaped(): | |
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34 | tt.check_pairs(wrap_transform(inputtransformer.escaped_transformer), esctransform_tests) | |
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35 | ||
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36 | def endhelp_test(): | |
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37 | tt.check_pairs(inputtransformer.transform_help_end.push, syntax['end_help']) |
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