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@@ -1,568 +1,590 b'' | |||
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1 | 1 | from __future__ import print_function |
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2 | 2 | |
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3 | 3 | # Standard library imports |
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4 | 4 | from collections import namedtuple |
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5 | 5 | import sys |
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6 | 6 | import time |
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7 | 7 | |
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8 | 8 | # System library imports |
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9 | 9 | from pygments.lexers import PythonLexer |
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10 | 10 | from PyQt4 import QtCore, QtGui |
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11 | 11 | |
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12 | 12 | # Local imports |
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13 | 13 | from IPython.core.inputsplitter import InputSplitter, transform_classic_prompt |
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14 | 14 | from IPython.core.oinspect import call_tip |
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15 | 15 | from IPython.frontend.qt.base_frontend_mixin import BaseFrontendMixin |
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16 | 16 | from IPython.utils.traitlets import Bool |
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17 | 17 | from bracket_matcher import BracketMatcher |
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18 | 18 | from call_tip_widget import CallTipWidget |
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19 | 19 | from completion_lexer import CompletionLexer |
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20 | 20 | from history_console_widget import HistoryConsoleWidget |
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21 | 21 | from pygments_highlighter import PygmentsHighlighter |
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22 | 22 | |
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23 | 23 | |
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24 | 24 | class FrontendHighlighter(PygmentsHighlighter): |
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25 | 25 | """ A PygmentsHighlighter that can be turned on and off and that ignores |
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26 | 26 | prompts. |
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27 | 27 | """ |
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28 | 28 | |
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29 | 29 | def __init__(self, frontend): |
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30 | 30 | super(FrontendHighlighter, self).__init__(frontend._control.document()) |
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31 | 31 | self._current_offset = 0 |
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32 | 32 | self._frontend = frontend |
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33 | 33 | self.highlighting_on = False |
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34 | 34 | |
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35 | 35 | def highlightBlock(self, qstring): |
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36 | 36 | """ Highlight a block of text. Reimplemented to highlight selectively. |
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37 | 37 | """ |
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38 | 38 | if not self.highlighting_on: |
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39 | 39 | return |
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40 | 40 | |
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41 | 41 | # The input to this function is unicode string that may contain |
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42 | 42 | # paragraph break characters, non-breaking spaces, etc. Here we acquire |
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43 | 43 | # the string as plain text so we can compare it. |
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44 | 44 | current_block = self.currentBlock() |
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45 | 45 | string = self._frontend._get_block_plain_text(current_block) |
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46 | 46 | |
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47 | 47 | # Decide whether to check for the regular or continuation prompt. |
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48 | 48 | if current_block.contains(self._frontend._prompt_pos): |
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49 | 49 | prompt = self._frontend._prompt |
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50 | 50 | else: |
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51 | 51 | prompt = self._frontend._continuation_prompt |
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52 | 52 | |
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53 | 53 | # Don't highlight the part of the string that contains the prompt. |
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54 | 54 | if string.startswith(prompt): |
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55 | 55 | self._current_offset = len(prompt) |
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56 | 56 | qstring.remove(0, len(prompt)) |
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57 | 57 | else: |
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58 | 58 | self._current_offset = 0 |
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59 | 59 | |
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60 | 60 | PygmentsHighlighter.highlightBlock(self, qstring) |
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61 | 61 | |
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62 | 62 | def rehighlightBlock(self, block): |
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63 | 63 | """ Reimplemented to temporarily enable highlighting if disabled. |
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64 | 64 | """ |
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65 | 65 | old = self.highlighting_on |
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66 | 66 | self.highlighting_on = True |
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67 | 67 | super(FrontendHighlighter, self).rehighlightBlock(block) |
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68 | 68 | self.highlighting_on = old |
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69 | 69 | |
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70 | 70 | def setFormat(self, start, count, format): |
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71 | 71 | """ Reimplemented to highlight selectively. |
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72 | 72 | """ |
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73 | 73 | start += self._current_offset |
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74 | 74 | PygmentsHighlighter.setFormat(self, start, count, format) |
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75 | 75 | |
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76 | 76 | |
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77 | 77 | class FrontendWidget(HistoryConsoleWidget, BaseFrontendMixin): |
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78 | 78 | """ A Qt frontend for a generic Python kernel. |
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79 | 79 | """ |
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80 | 80 | |
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81 | 81 | # An option and corresponding signal for overriding the default kernel |
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82 | 82 | # interrupt behavior. |
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83 | 83 | custom_interrupt = Bool(False) |
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84 | 84 | custom_interrupt_requested = QtCore.pyqtSignal() |
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85 | 85 | |
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86 | 86 | # An option and corresponding signals for overriding the default kernel |
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87 | 87 | # restart behavior. |
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88 | 88 | custom_restart = Bool(False) |
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89 | 89 | custom_restart_kernel_died = QtCore.pyqtSignal(float) |
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90 | 90 | custom_restart_requested = QtCore.pyqtSignal() |
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91 | 91 | |
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92 | 92 | # Emitted when an 'execute_reply' has been received from the kernel and |
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93 | 93 | # processed by the FrontendWidget. |
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94 | 94 | executed = QtCore.pyqtSignal(object) |
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95 | 95 | |
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96 | 96 | # Emitted when an exit request has been received from the kernel. |
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97 | 97 | exit_requested = QtCore.pyqtSignal() |
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98 | 98 | |
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99 | 99 | # Protected class variables. |
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100 | 100 | _CallTipRequest = namedtuple('_CallTipRequest', ['id', 'pos']) |
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101 | 101 | _CompletionRequest = namedtuple('_CompletionRequest', ['id', 'pos']) |
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102 | 102 | _ExecutionRequest = namedtuple('_ExecutionRequest', ['id', 'kind']) |
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103 | 103 | _input_splitter_class = InputSplitter |
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104 | _local_kernel = False | |
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104 | 105 | |
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105 | 106 | #--------------------------------------------------------------------------- |
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106 | 107 | # 'object' interface |
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107 | 108 | #--------------------------------------------------------------------------- |
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108 | 109 | |
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109 | 110 | def __init__(self, *args, **kw): |
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110 | 111 | super(FrontendWidget, self).__init__(*args, **kw) |
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111 | 112 | |
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112 | 113 | # FrontendWidget protected variables. |
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113 | 114 | self._bracket_matcher = BracketMatcher(self._control) |
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114 | 115 | self._call_tip_widget = CallTipWidget(self._control) |
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115 | 116 | self._completion_lexer = CompletionLexer(PythonLexer()) |
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116 | 117 | self._copy_raw_action = QtGui.QAction('Copy (Raw Text)', None) |
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117 | 118 | self._hidden = False |
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118 | 119 | self._highlighter = FrontendHighlighter(self) |
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119 | 120 | self._input_splitter = self._input_splitter_class(input_mode='cell') |
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120 | 121 | self._kernel_manager = None |
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121 | 122 | self._request_info = {} |
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122 | 123 | |
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123 | 124 | # Configure the ConsoleWidget. |
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124 | 125 | self.tab_width = 4 |
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125 | 126 | self._set_continuation_prompt('... ') |
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126 | 127 | |
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127 | 128 | # Configure the CallTipWidget. |
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128 | 129 | self._call_tip_widget.setFont(self.font) |
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129 | 130 | self.font_changed.connect(self._call_tip_widget.setFont) |
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130 | 131 | |
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131 | 132 | # Configure actions. |
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132 | 133 | action = self._copy_raw_action |
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133 | 134 | key = QtCore.Qt.CTRL | QtCore.Qt.SHIFT | QtCore.Qt.Key_C |
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134 | 135 | action.setEnabled(False) |
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135 | 136 | action.setShortcut(QtGui.QKeySequence(key)) |
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136 | 137 | action.setShortcutContext(QtCore.Qt.WidgetWithChildrenShortcut) |
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137 | 138 | action.triggered.connect(self.copy_raw) |
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138 | 139 | self.copy_available.connect(action.setEnabled) |
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139 | 140 | self.addAction(action) |
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140 | 141 | |
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141 | 142 | # Connect signal handlers. |
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142 | 143 | document = self._control.document() |
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143 | 144 | document.contentsChange.connect(self._document_contents_change) |
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145 | ||
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146 | # set flag for whether we are connected via localhost | |
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147 | self._local_kernel = kw.get('local_kernel', False) | |
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144 | 148 | |
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145 | 149 | #--------------------------------------------------------------------------- |
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146 | 150 | # 'ConsoleWidget' public interface |
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147 | 151 | #--------------------------------------------------------------------------- |
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148 | 152 | |
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149 | 153 | def copy(self): |
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150 | 154 | """ Copy the currently selected text to the clipboard, removing prompts. |
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151 | 155 | """ |
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152 | 156 | text = unicode(self._control.textCursor().selection().toPlainText()) |
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153 | 157 | if text: |
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154 | 158 | lines = map(transform_classic_prompt, text.splitlines()) |
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155 | 159 | text = '\n'.join(lines) |
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156 | 160 | QtGui.QApplication.clipboard().setText(text) |
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157 | 161 | |
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158 | 162 | #--------------------------------------------------------------------------- |
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159 | 163 | # 'ConsoleWidget' abstract interface |
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160 | 164 | #--------------------------------------------------------------------------- |
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161 | 165 | |
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162 | 166 | def _is_complete(self, source, interactive): |
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163 | 167 | """ Returns whether 'source' can be completely processed and a new |
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164 | 168 | prompt created. When triggered by an Enter/Return key press, |
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165 | 169 | 'interactive' is True; otherwise, it is False. |
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166 | 170 | """ |
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167 | 171 | complete = self._input_splitter.push(source) |
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168 | 172 | if interactive: |
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169 | 173 | complete = not self._input_splitter.push_accepts_more() |
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170 | 174 | return complete |
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171 | 175 | |
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172 | 176 | def _execute(self, source, hidden): |
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173 | 177 | """ Execute 'source'. If 'hidden', do not show any output. |
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174 | 178 | |
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175 | 179 | See parent class :meth:`execute` docstring for full details. |
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176 | 180 | """ |
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177 | 181 | msg_id = self.kernel_manager.xreq_channel.execute(source, hidden) |
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178 | 182 | self._request_info['execute'] = self._ExecutionRequest(msg_id, 'user') |
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179 | 183 | self._hidden = hidden |
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180 | 184 | |
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181 | 185 | def _prompt_started_hook(self): |
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182 | 186 | """ Called immediately after a new prompt is displayed. |
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183 | 187 | """ |
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184 | 188 | if not self._reading: |
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185 | 189 | self._highlighter.highlighting_on = True |
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186 | 190 | |
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187 | 191 | def _prompt_finished_hook(self): |
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188 | 192 | """ Called immediately after a prompt is finished, i.e. when some input |
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189 | 193 | will be processed and a new prompt displayed. |
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190 | 194 | """ |
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191 | 195 | if not self._reading: |
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192 | 196 | self._highlighter.highlighting_on = False |
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193 | 197 | |
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194 | 198 | def _tab_pressed(self): |
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195 | 199 | """ Called when the tab key is pressed. Returns whether to continue |
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196 | 200 | processing the event. |
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197 | 201 | """ |
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198 | 202 | # Perform tab completion if: |
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199 | 203 | # 1) The cursor is in the input buffer. |
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200 | 204 | # 2) There is a non-whitespace character before the cursor. |
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201 | 205 | text = self._get_input_buffer_cursor_line() |
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202 | 206 | if text is None: |
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203 | 207 | return False |
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204 | 208 | complete = bool(text[:self._get_input_buffer_cursor_column()].strip()) |
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205 | 209 | if complete: |
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206 | 210 | self._complete() |
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207 | 211 | return not complete |
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208 | 212 | |
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209 | 213 | #--------------------------------------------------------------------------- |
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210 | 214 | # 'ConsoleWidget' protected interface |
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211 | 215 | #--------------------------------------------------------------------------- |
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212 | 216 | |
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213 | 217 | def _context_menu_make(self, pos): |
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214 | 218 | """ Reimplemented to add an action for raw copy. |
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215 | 219 | """ |
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216 | 220 | menu = super(FrontendWidget, self)._context_menu_make(pos) |
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217 | 221 | for before_action in menu.actions(): |
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218 | 222 | if before_action.shortcut().matches(QtGui.QKeySequence.Paste) == \ |
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219 | 223 | QtGui.QKeySequence.ExactMatch: |
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220 | 224 | menu.insertAction(before_action, self._copy_raw_action) |
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221 | 225 | break |
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222 | 226 | return menu |
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223 | 227 | |
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224 | 228 | def _event_filter_console_keypress(self, event): |
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225 | 229 | """ Reimplemented for execution interruption and smart backspace. |
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226 | 230 | """ |
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227 | 231 | key = event.key() |
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228 | 232 | if self._control_key_down(event.modifiers(), include_command=False): |
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229 | 233 | |
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230 | 234 | if key == QtCore.Qt.Key_C and self._executing: |
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231 | 235 | self.interrupt_kernel() |
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232 | 236 | return True |
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233 | 237 | |
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234 | 238 | elif key == QtCore.Qt.Key_Period: |
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235 | 239 | message = 'Are you sure you want to restart the kernel?' |
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236 | 240 | self.restart_kernel(message, now=False) |
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237 | 241 | return True |
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238 | 242 | |
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239 | 243 | elif not event.modifiers() & QtCore.Qt.AltModifier: |
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240 | 244 | |
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241 | 245 | # Smart backspace: remove four characters in one backspace if: |
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242 | 246 | # 1) everything left of the cursor is whitespace |
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243 | 247 | # 2) the four characters immediately left of the cursor are spaces |
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244 | 248 | if key == QtCore.Qt.Key_Backspace: |
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245 | 249 | col = self._get_input_buffer_cursor_column() |
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246 | 250 | cursor = self._control.textCursor() |
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247 | 251 | if col > 3 and not cursor.hasSelection(): |
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248 | 252 | text = self._get_input_buffer_cursor_line()[:col] |
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249 | 253 | if text.endswith(' ') and not text.strip(): |
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250 | 254 | cursor.movePosition(QtGui.QTextCursor.Left, |
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251 | 255 | QtGui.QTextCursor.KeepAnchor, 4) |
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252 | 256 | cursor.removeSelectedText() |
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253 | 257 | return True |
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254 | 258 | |
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255 | 259 | return super(FrontendWidget, self)._event_filter_console_keypress(event) |
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256 | 260 | |
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257 | 261 | def _insert_continuation_prompt(self, cursor): |
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258 | 262 | """ Reimplemented for auto-indentation. |
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259 | 263 | """ |
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260 | 264 | super(FrontendWidget, self)._insert_continuation_prompt(cursor) |
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261 | 265 | cursor.insertText(' ' * self._input_splitter.indent_spaces) |
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262 | 266 | |
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263 | 267 | #--------------------------------------------------------------------------- |
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264 | 268 | # 'BaseFrontendMixin' abstract interface |
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265 | 269 | #--------------------------------------------------------------------------- |
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266 | 270 | |
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267 | 271 | def _handle_complete_reply(self, rep): |
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268 | 272 | """ Handle replies for tab completion. |
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269 | 273 | """ |
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270 | 274 | cursor = self._get_cursor() |
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271 | 275 | info = self._request_info.get('complete') |
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272 | 276 | if info and info.id == rep['parent_header']['msg_id'] and \ |
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273 | 277 | info.pos == cursor.position(): |
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274 | 278 | text = '.'.join(self._get_context()) |
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275 | 279 | cursor.movePosition(QtGui.QTextCursor.Left, n=len(text)) |
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276 | 280 | self._complete_with_items(cursor, rep['content']['matches']) |
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277 | 281 | |
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278 | 282 | def _handle_execute_reply(self, msg): |
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279 | 283 | """ Handles replies for code execution. |
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280 | 284 | """ |
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281 | 285 | info = self._request_info.get('execute') |
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282 | 286 | if info and info.id == msg['parent_header']['msg_id'] and \ |
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283 | 287 | info.kind == 'user' and not self._hidden: |
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284 | 288 | # Make sure that all output from the SUB channel has been processed |
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285 | 289 | # before writing a new prompt. |
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286 | 290 | self.kernel_manager.sub_channel.flush() |
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287 | 291 | |
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288 | 292 | # Reset the ANSI style information to prevent bad text in stdout |
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289 | 293 | # from messing up our colors. We're not a true terminal so we're |
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290 | 294 | # allowed to do this. |
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291 | 295 | if self.ansi_codes: |
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292 | 296 | self._ansi_processor.reset_sgr() |
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293 | 297 | |
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294 | 298 | content = msg['content'] |
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295 | 299 | status = content['status'] |
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296 | 300 | if status == 'ok': |
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297 | 301 | self._process_execute_ok(msg) |
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298 | 302 | elif status == 'error': |
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299 | 303 | self._process_execute_error(msg) |
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300 | 304 | elif status == 'abort': |
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301 | 305 | self._process_execute_abort(msg) |
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302 | 306 | |
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303 | 307 | self._show_interpreter_prompt_for_reply(msg) |
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304 | 308 | self.executed.emit(msg) |
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305 | 309 | |
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306 | 310 | def _handle_input_request(self, msg): |
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307 | 311 | """ Handle requests for raw_input. |
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308 | 312 | """ |
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309 | 313 | if self._hidden: |
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310 | 314 | raise RuntimeError('Request for raw input during hidden execution.') |
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311 | 315 | |
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312 | 316 | # Make sure that all output from the SUB channel has been processed |
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313 | 317 | # before entering readline mode. |
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314 | 318 | self.kernel_manager.sub_channel.flush() |
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315 | 319 | |
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316 | 320 | def callback(line): |
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317 | 321 | self.kernel_manager.rep_channel.input(line) |
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318 | 322 | self._readline(msg['content']['prompt'], callback=callback) |
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319 | 323 | |
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320 | 324 | def _handle_kernel_died(self, since_last_heartbeat): |
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321 | 325 | """ Handle the kernel's death by asking if the user wants to restart. |
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322 | 326 | """ |
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323 | 327 | if self.custom_restart: |
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324 | 328 | self.custom_restart_kernel_died.emit(since_last_heartbeat) |
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325 | 329 | else: |
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326 | 330 | message = 'The kernel heartbeat has been inactive for %.2f ' \ |
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327 | 331 | 'seconds. Do you want to restart the kernel? You may ' \ |
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328 | 332 | 'first want to check the network connection.' % \ |
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329 | 333 | since_last_heartbeat |
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330 | 334 | self.restart_kernel(message, now=True) |
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331 | 335 | |
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332 | 336 | def _handle_object_info_reply(self, rep): |
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333 | 337 | """ Handle replies for call tips. |
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334 | 338 | """ |
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335 | 339 | cursor = self._get_cursor() |
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336 | 340 | info = self._request_info.get('call_tip') |
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337 | 341 | if info and info.id == rep['parent_header']['msg_id'] and \ |
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338 | 342 | info.pos == cursor.position(): |
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339 | 343 | # Get the information for a call tip. For now we format the call |
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340 | 344 | # line as string, later we can pass False to format_call and |
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341 | 345 | # syntax-highlight it ourselves for nicer formatting in the |
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342 | 346 | # calltip. |
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343 | 347 | call_info, doc = call_tip(rep['content'], format_call=True) |
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344 | 348 | if call_info or doc: |
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345 | 349 | self._call_tip_widget.show_call_info(call_info, doc) |
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346 | 350 | |
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347 | 351 | def _handle_pyout(self, msg): |
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348 | 352 | """ Handle display hook output. |
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349 | 353 | """ |
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350 | 354 | if not self._hidden and self._is_from_this_session(msg): |
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351 | 355 | self._append_plain_text(msg['content']['data'] + '\n') |
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352 | 356 | |
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353 | 357 | def _handle_stream(self, msg): |
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354 | 358 | """ Handle stdout, stderr, and stdin. |
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355 | 359 | """ |
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356 | 360 | if not self._hidden and self._is_from_this_session(msg): |
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357 | 361 | # Most consoles treat tabs as being 8 space characters. Convert tabs |
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358 | 362 | # to spaces so that output looks as expected regardless of this |
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359 | 363 | # widget's tab width. |
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360 | 364 | text = msg['content']['data'].expandtabs(8) |
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361 | 365 | |
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362 | 366 | self._append_plain_text(text) |
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363 | 367 | self._control.moveCursor(QtGui.QTextCursor.End) |
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364 | 368 | |
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365 | 369 | def _handle_shutdown_reply(self, msg): |
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366 | 370 | """ Handle shutdown signal, only if from other console. |
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367 | 371 | """ |
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368 | 372 | if not self._hidden and not self._is_from_this_session(msg): |
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369 | if not msg['content']['restart']: | |
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370 | sys.exit(0) | |
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371 | else: | |
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372 | # we just got notified of a restart! | |
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373 | time.sleep(0.25) # wait 1/4 sec to reset | |
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374 | # lest the request for a new prompt | |
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375 |
|
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376 | self.reset() | |
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373 | if self._local_kernel: | |
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374 | if not msg['content']['restart']: | |
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375 | sys.exit(0) | |
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376 | else: | |
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377 | # we just got notified of a restart! | |
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378 | time.sleep(0.25) # wait 1/4 sec to reset | |
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379 | # lest the request for a new prompt | |
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380 | # goes to the old kernel | |
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381 | self.reset() | |
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382 | else: # remote kernel, prompt on Kernel shutdown/reset | |
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383 | title = self.window().windowTitle() | |
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384 | if not msg['content']['restart']: | |
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385 | reply = QtGui.QMessageBox.question(self, title, | |
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386 | "Kernel has been shutdown permanently. Close the Console?", | |
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387 | QtGui.QMessageBox.Yes,QtGui.QMessageBox.No) | |
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388 | if reply == QtGui.QMessageBox.Yes: | |
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389 | sys.exit(0) | |
|
390 | else: | |
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391 | reply = QtGui.QMessageBox.question(self, title, | |
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392 | "Kernel has been reset. Clear the Console?", | |
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393 | QtGui.QMessageBox.Yes,QtGui.QMessageBox.No) | |
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394 | if reply == QtGui.QMessageBox.Yes: | |
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395 | time.sleep(0.25) # wait 1/4 sec to reset | |
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396 | # lest the request for a new prompt | |
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397 | # goes to the old kernel | |
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398 | self.reset() | |
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377 | 399 | |
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378 | 400 | def _started_channels(self): |
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379 | 401 | """ Called when the KernelManager channels have started listening or |
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380 | 402 | when the frontend is assigned an already listening KernelManager. |
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381 | 403 | """ |
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382 | 404 | self.reset() |
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383 | 405 | |
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384 | 406 | #--------------------------------------------------------------------------- |
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385 | 407 | # 'FrontendWidget' public interface |
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386 | 408 | #--------------------------------------------------------------------------- |
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387 | 409 | |
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388 | 410 | def copy_raw(self): |
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389 | 411 | """ Copy the currently selected text to the clipboard without attempting |
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390 | 412 | to remove prompts or otherwise alter the text. |
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391 | 413 | """ |
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392 | 414 | self._control.copy() |
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393 | 415 | |
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394 | 416 | def execute_file(self, path, hidden=False): |
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395 | 417 | """ Attempts to execute file with 'path'. If 'hidden', no output is |
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396 | 418 | shown. |
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397 | 419 | """ |
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398 | 420 | self.execute('execfile("%s")' % path, hidden=hidden) |
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399 | 421 | |
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400 | 422 | def interrupt_kernel(self): |
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401 | 423 | """ Attempts to interrupt the running kernel. |
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402 | 424 | """ |
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403 | 425 | if self.custom_interrupt: |
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404 | 426 | self.custom_interrupt_requested.emit() |
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405 | 427 | elif self.kernel_manager.has_kernel: |
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406 | 428 | self.kernel_manager.interrupt_kernel() |
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407 | 429 | else: |
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408 | 430 | self._append_plain_text('Kernel process is either remote or ' |
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409 | 431 | 'unspecified. Cannot interrupt.\n') |
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410 | 432 | |
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411 | 433 | def reset(self): |
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412 | 434 | """ Resets the widget to its initial state. Similar to ``clear``, but |
|
413 | 435 | also re-writes the banner and aborts execution if necessary. |
|
414 | 436 | """ |
|
415 | 437 | if self._executing: |
|
416 | 438 | self._executing = False |
|
417 | 439 | self._request_info['execute'] = None |
|
418 | 440 | self._reading = False |
|
419 | 441 | self._highlighter.highlighting_on = False |
|
420 | 442 | |
|
421 | 443 | self._control.clear() |
|
422 | 444 | self._append_plain_text(self._get_banner()) |
|
423 | 445 | self._show_interpreter_prompt() |
|
424 | 446 | |
|
425 | 447 | def restart_kernel(self, message, now=False): |
|
426 | 448 | """ Attempts to restart the running kernel. |
|
427 | 449 | """ |
|
428 | 450 | # FIXME: now should be configurable via a checkbox in the dialog. Right |
|
429 | 451 | # now at least the heartbeat path sets it to True and the manual restart |
|
430 | 452 | # to False. But those should just be the pre-selected states of a |
|
431 | 453 | # checkbox that the user could override if so desired. But I don't know |
|
432 | 454 | # enough Qt to go implementing the checkbox now. |
|
433 | 455 | |
|
434 | 456 | if self.custom_restart: |
|
435 | 457 | self.custom_restart_requested.emit() |
|
436 | 458 | |
|
437 | 459 | elif self.kernel_manager.has_kernel: |
|
438 | 460 | # Pause the heart beat channel to prevent further warnings. |
|
439 | 461 | self.kernel_manager.hb_channel.pause() |
|
440 | 462 | |
|
441 | 463 | # Prompt the user to restart the kernel. Un-pause the heartbeat if |
|
442 | 464 | # they decline. (If they accept, the heartbeat will be un-paused |
|
443 | 465 | # automatically when the kernel is restarted.) |
|
444 | 466 | buttons = QtGui.QMessageBox.Yes | QtGui.QMessageBox.No |
|
445 | 467 | result = QtGui.QMessageBox.question(self, 'Restart kernel?', |
|
446 | 468 | message, buttons) |
|
447 | 469 | if result == QtGui.QMessageBox.Yes: |
|
448 | 470 | try: |
|
449 | 471 | self.kernel_manager.restart_kernel(now=now) |
|
450 | 472 | except RuntimeError: |
|
451 | 473 | self._append_plain_text('Kernel started externally. ' |
|
452 | 474 | 'Cannot restart.\n') |
|
453 | 475 | else: |
|
454 | 476 | self.reset() |
|
455 | 477 | else: |
|
456 | 478 | self.kernel_manager.hb_channel.unpause() |
|
457 | 479 | |
|
458 | 480 | else: |
|
459 | 481 | self._append_plain_text('Kernel process is either remote or ' |
|
460 | 482 | 'unspecified. Cannot restart.\n') |
|
461 | 483 | |
|
462 | 484 | #--------------------------------------------------------------------------- |
|
463 | 485 | # 'FrontendWidget' protected interface |
|
464 | 486 | #--------------------------------------------------------------------------- |
|
465 | 487 | |
|
466 | 488 | def _call_tip(self): |
|
467 | 489 | """ Shows a call tip, if appropriate, at the current cursor location. |
|
468 | 490 | """ |
|
469 | 491 | # Decide if it makes sense to show a call tip |
|
470 | 492 | cursor = self._get_cursor() |
|
471 | 493 | cursor.movePosition(QtGui.QTextCursor.Left) |
|
472 | 494 | if cursor.document().characterAt(cursor.position()).toAscii() != '(': |
|
473 | 495 | return False |
|
474 | 496 | context = self._get_context(cursor) |
|
475 | 497 | if not context: |
|
476 | 498 | return False |
|
477 | 499 | |
|
478 | 500 | # Send the metadata request to the kernel |
|
479 | 501 | name = '.'.join(context) |
|
480 | 502 | msg_id = self.kernel_manager.xreq_channel.object_info(name) |
|
481 | 503 | pos = self._get_cursor().position() |
|
482 | 504 | self._request_info['call_tip'] = self._CallTipRequest(msg_id, pos) |
|
483 | 505 | return True |
|
484 | 506 | |
|
485 | 507 | def _complete(self): |
|
486 | 508 | """ Performs completion at the current cursor location. |
|
487 | 509 | """ |
|
488 | 510 | context = self._get_context() |
|
489 | 511 | if context: |
|
490 | 512 | # Send the completion request to the kernel |
|
491 | 513 | msg_id = self.kernel_manager.xreq_channel.complete( |
|
492 | 514 | '.'.join(context), # text |
|
493 | 515 | self._get_input_buffer_cursor_line(), # line |
|
494 | 516 | self._get_input_buffer_cursor_column(), # cursor_pos |
|
495 | 517 | self.input_buffer) # block |
|
496 | 518 | pos = self._get_cursor().position() |
|
497 | 519 | info = self._CompletionRequest(msg_id, pos) |
|
498 | 520 | self._request_info['complete'] = info |
|
499 | 521 | |
|
500 | 522 | def _get_banner(self): |
|
501 | 523 | """ Gets a banner to display at the beginning of a session. |
|
502 | 524 | """ |
|
503 | 525 | banner = 'Python %s on %s\nType "help", "copyright", "credits" or ' \ |
|
504 | 526 | '"license" for more information.' |
|
505 | 527 | return banner % (sys.version, sys.platform) |
|
506 | 528 | |
|
507 | 529 | def _get_context(self, cursor=None): |
|
508 | 530 | """ Gets the context for the specified cursor (or the current cursor |
|
509 | 531 | if none is specified). |
|
510 | 532 | """ |
|
511 | 533 | if cursor is None: |
|
512 | 534 | cursor = self._get_cursor() |
|
513 | 535 | cursor.movePosition(QtGui.QTextCursor.StartOfBlock, |
|
514 | 536 | QtGui.QTextCursor.KeepAnchor) |
|
515 | 537 | text = unicode(cursor.selection().toPlainText()) |
|
516 | 538 | return self._completion_lexer.get_context(text) |
|
517 | 539 | |
|
518 | 540 | def _process_execute_abort(self, msg): |
|
519 | 541 | """ Process a reply for an aborted execution request. |
|
520 | 542 | """ |
|
521 | 543 | self._append_plain_text("ERROR: execution aborted\n") |
|
522 | 544 | |
|
523 | 545 | def _process_execute_error(self, msg): |
|
524 | 546 | """ Process a reply for an execution request that resulted in an error. |
|
525 | 547 | """ |
|
526 | 548 | content = msg['content'] |
|
527 | 549 | traceback = ''.join(content['traceback']) |
|
528 | 550 | self._append_plain_text(traceback) |
|
529 | 551 | |
|
530 | 552 | def _process_execute_ok(self, msg): |
|
531 | 553 | """ Process a reply for a successful execution equest. |
|
532 | 554 | """ |
|
533 | 555 | payload = msg['content']['payload'] |
|
534 | 556 | for item in payload: |
|
535 | 557 | if not self._process_execute_payload(item): |
|
536 | 558 | warning = 'Warning: received unknown payload of type %s' |
|
537 | 559 | print(warning % repr(item['source'])) |
|
538 | 560 | |
|
539 | 561 | def _process_execute_payload(self, item): |
|
540 | 562 | """ Process a single payload item from the list of payload items in an |
|
541 | 563 | execution reply. Returns whether the payload was handled. |
|
542 | 564 | """ |
|
543 | 565 | # The basic FrontendWidget doesn't handle payloads, as they are a |
|
544 | 566 | # mechanism for going beyond the standard Python interpreter model. |
|
545 | 567 | return False |
|
546 | 568 | |
|
547 | 569 | def _show_interpreter_prompt(self): |
|
548 | 570 | """ Shows a prompt for the interpreter. |
|
549 | 571 | """ |
|
550 | 572 | self._show_prompt('>>> ') |
|
551 | 573 | |
|
552 | 574 | def _show_interpreter_prompt_for_reply(self, msg): |
|
553 | 575 | """ Shows a prompt for the interpreter given an 'execute_reply' message. |
|
554 | 576 | """ |
|
555 | 577 | self._show_interpreter_prompt() |
|
556 | 578 | |
|
557 | 579 | #------ Signal handlers ---------------------------------------------------- |
|
558 | 580 | |
|
559 | 581 | def _document_contents_change(self, position, removed, added): |
|
560 | 582 | """ Called whenever the document's content changes. Display a call tip |
|
561 | 583 | if appropriate. |
|
562 | 584 | """ |
|
563 | 585 | # Calculate where the cursor should be *after* the change: |
|
564 | 586 | position += added |
|
565 | 587 | |
|
566 | 588 | document = self._control.document() |
|
567 | 589 | if position == self._get_cursor().position(): |
|
568 | 590 | self._call_tip() |
@@ -1,158 +1,160 b'' | |||
|
1 | 1 | """ A minimal application using the Qt console-style IPython frontend. |
|
2 | 2 | """ |
|
3 | 3 | |
|
4 | 4 | #----------------------------------------------------------------------------- |
|
5 | 5 | # Imports |
|
6 | 6 | #----------------------------------------------------------------------------- |
|
7 | 7 | |
|
8 | 8 | # Systemm library imports |
|
9 | 9 | from PyQt4 import QtGui |
|
10 | 10 | |
|
11 | 11 | # Local imports |
|
12 | 12 | from IPython.external.argparse import ArgumentParser |
|
13 | 13 | from IPython.frontend.qt.console.frontend_widget import FrontendWidget |
|
14 | 14 | from IPython.frontend.qt.console.ipython_widget import IPythonWidget |
|
15 | 15 | from IPython.frontend.qt.console.rich_ipython_widget import RichIPythonWidget |
|
16 | 16 | from IPython.frontend.qt.kernelmanager import QtKernelManager |
|
17 | 17 | |
|
18 | 18 | #----------------------------------------------------------------------------- |
|
19 | 19 | # Constants |
|
20 | 20 | #----------------------------------------------------------------------------- |
|
21 | 21 | |
|
22 | 22 | LOCALHOST = '127.0.0.1' |
|
23 | 23 | |
|
24 | 24 | #----------------------------------------------------------------------------- |
|
25 | 25 | # Classes |
|
26 | 26 | #----------------------------------------------------------------------------- |
|
27 | 27 | |
|
28 | 28 | class MainWindow(QtGui.QMainWindow): |
|
29 | 29 | |
|
30 | 30 | #--------------------------------------------------------------------------- |
|
31 | 31 | # 'object' interface |
|
32 | 32 | #--------------------------------------------------------------------------- |
|
33 | 33 | |
|
34 | 34 | def __init__(self, app, frontend, existing=False): |
|
35 | 35 | """ Create a MainWindow for the specified FrontendWidget. |
|
36 | 36 | |
|
37 | 37 | The app is passed as an argument to allow for different |
|
38 | 38 | closing behavior depending on whether we are the Kernel's parent. |
|
39 | 39 | |
|
40 | 40 | If existing is True, then this Window does not own the Kernel. |
|
41 | 41 | """ |
|
42 | 42 | super(MainWindow, self).__init__() |
|
43 | 43 | self._app = app |
|
44 | 44 | self._frontend = frontend |
|
45 | 45 | self._existing = existing |
|
46 | 46 | self._frontend.exit_requested.connect(self.close) |
|
47 | 47 | self.setCentralWidget(frontend) |
|
48 | 48 | |
|
49 | 49 | #--------------------------------------------------------------------------- |
|
50 | 50 | # QWidget interface |
|
51 | 51 | #--------------------------------------------------------------------------- |
|
52 | 52 | |
|
53 | 53 | def closeEvent(self, event): |
|
54 | 54 | """ Reimplemented to prompt the user and close the kernel cleanly. |
|
55 | 55 | """ |
|
56 | 56 | kernel_manager = self._frontend.kernel_manager |
|
57 | 57 | if kernel_manager and kernel_manager.channels_running: |
|
58 | 58 | title = self.window().windowTitle() |
|
59 | 59 | reply = QtGui.QMessageBox.question(self, title, |
|
60 | "Close just this console, or shutdown the kernel and close "+ | |
|
61 | "all windows attached to it?", | |
|
62 |
'Cancel', ' |
|
|
60 | "You are closing this Console window."+ | |
|
61 | "\nWould you like to quit the Kernel and all attached Consoles as well?", | |
|
62 | 'Cancel', 'No, just this Console', 'Yes, quit everything') | |
|
63 | 63 | if reply == 2: # close All |
|
64 | 64 | kernel_manager.shutdown_kernel() |
|
65 | 65 | #kernel_manager.stop_channels() |
|
66 | 66 | event.accept() |
|
67 | 67 | elif reply == 1: # close Console |
|
68 | 68 | if not self._existing: |
|
69 | 69 | # I have the kernel: don't quit, just close the window |
|
70 | 70 | self._app.setQuitOnLastWindowClosed(False) |
|
71 | self.deleteLater() | |
|
71 | 72 | event.accept() |
|
72 | 73 | else: |
|
73 | 74 | event.ignore() |
|
74 | 75 | |
|
75 | 76 | #----------------------------------------------------------------------------- |
|
76 | 77 | # Main entry point |
|
77 | 78 | #----------------------------------------------------------------------------- |
|
78 | 79 | |
|
79 | 80 | def main(): |
|
80 | 81 | """ Entry point for application. |
|
81 | 82 | """ |
|
82 | 83 | # Parse command line arguments. |
|
83 | 84 | parser = ArgumentParser() |
|
84 | 85 | kgroup = parser.add_argument_group('kernel options') |
|
85 | 86 | kgroup.add_argument('-e', '--existing', action='store_true', |
|
86 | 87 | help='connect to an existing kernel') |
|
87 | 88 | kgroup.add_argument('--ip', type=str, default=LOCALHOST, |
|
88 | 89 | help='set the kernel\'s IP address [default localhost]') |
|
89 | 90 | kgroup.add_argument('--xreq', type=int, metavar='PORT', default=0, |
|
90 | 91 | help='set the XREQ channel port [default random]') |
|
91 | 92 | kgroup.add_argument('--sub', type=int, metavar='PORT', default=0, |
|
92 | 93 | help='set the SUB channel port [default random]') |
|
93 | 94 | kgroup.add_argument('--rep', type=int, metavar='PORT', default=0, |
|
94 | 95 | help='set the REP channel port [default random]') |
|
95 | 96 | kgroup.add_argument('--hb', type=int, metavar='PORT', default=0, |
|
96 | 97 | help='set the heartbeat port [default: random]') |
|
97 | 98 | |
|
98 | 99 | egroup = kgroup.add_mutually_exclusive_group() |
|
99 | 100 | egroup.add_argument('--pure', action='store_true', help = \ |
|
100 | 101 | 'use a pure Python kernel instead of an IPython kernel') |
|
101 | 102 | egroup.add_argument('--pylab', type=str, metavar='GUI', nargs='?', |
|
102 | 103 | const='auto', help = \ |
|
103 | 104 | "Pre-load matplotlib and numpy for interactive use. If GUI is not \ |
|
104 | 105 | given, the GUI backend is matplotlib's, otherwise use one of: \ |
|
105 | 106 | ['tk', 'gtk', 'qt', 'wx', 'inline'].") |
|
106 | 107 | |
|
107 | 108 | wgroup = parser.add_argument_group('widget options') |
|
108 | 109 | wgroup.add_argument('--paging', type=str, default='inside', |
|
109 | 110 | choices = ['inside', 'hsplit', 'vsplit', 'none'], |
|
110 | 111 | help='set the paging style [default inside]') |
|
111 | 112 | wgroup.add_argument('--rich', action='store_true', |
|
112 | 113 | help='enable rich text support') |
|
113 | 114 | wgroup.add_argument('--gui-completion', action='store_true', |
|
114 | 115 | help='use a GUI widget for tab completion') |
|
115 | 116 | |
|
116 | 117 | args = parser.parse_args() |
|
117 | 118 | |
|
118 | 119 | # Don't let Qt or ZMQ swallow KeyboardInterupts. |
|
119 | 120 | import signal |
|
120 | 121 | signal.signal(signal.SIGINT, signal.SIG_DFL) |
|
121 | 122 | |
|
122 | 123 | # Create a KernelManager and start a kernel. |
|
123 | 124 | kernel_manager = QtKernelManager(xreq_address=(args.ip, args.xreq), |
|
124 | 125 | sub_address=(args.ip, args.sub), |
|
125 | 126 | rep_address=(args.ip, args.rep), |
|
126 | 127 | hb_address=(args.ip, args.hb)) |
|
127 | 128 | if args.ip == LOCALHOST and not args.existing: |
|
128 | 129 | if args.pure: |
|
129 | 130 | kernel_manager.start_kernel(ipython=False) |
|
130 | 131 | elif args.pylab: |
|
131 | 132 | kernel_manager.start_kernel(pylab=args.pylab) |
|
132 | 133 | else: |
|
133 | 134 | kernel_manager.start_kernel() |
|
134 | 135 | kernel_manager.start_channels() |
|
135 | 136 | |
|
137 | local_kernel = (args.ip == LOCALHOST) | |
|
136 | 138 | # Create the widget. |
|
137 | 139 | app = QtGui.QApplication([]) |
|
138 | 140 | if args.pure: |
|
139 | 141 | kind = 'rich' if args.rich else 'plain' |
|
140 | widget = FrontendWidget(kind=kind, paging=args.paging) | |
|
142 | widget = FrontendWidget(kind=kind, paging=args.paging, local_kernel=local_kernel) | |
|
141 | 143 | elif args.rich or args.pylab: |
|
142 | widget = RichIPythonWidget(paging=args.paging) | |
|
144 | widget = RichIPythonWidget(paging=args.paging, local_kernel=local_kernel) | |
|
143 | 145 | else: |
|
144 | widget = IPythonWidget(paging=args.paging) | |
|
146 | widget = IPythonWidget(paging=args.paging, local_kernel=local_kernel) | |
|
145 | 147 | widget.gui_completion = args.gui_completion |
|
146 | 148 | widget.kernel_manager = kernel_manager |
|
147 | 149 | |
|
148 | 150 | # Create the main window. |
|
149 | 151 | window = MainWindow(app, widget, args.existing) |
|
150 | 152 | window.setWindowTitle('Python' if args.pure else 'IPython') |
|
151 | 153 | window.show() |
|
152 | 154 | |
|
153 | 155 | # Start the application main loop. |
|
154 | 156 | app.exec_() |
|
155 | 157 | |
|
156 | 158 | |
|
157 | 159 | if __name__ == '__main__': |
|
158 | 160 | main() |
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