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@@ -1,131 +1,177 b'' | |||
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1 | 1 | # Standard library imports |
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2 | 2 | import re |
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3 | 3 | |
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4 | 4 | # System library imports |
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5 | 5 | from PyQt4 import QtCore, QtGui |
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6 | 6 | |
|
7 | 7 | |
|
8 | class AnsiAction(object): | |
|
9 | """ Represents an action requested by an ANSI escape sequence. | |
|
10 | """ | |
|
11 | def __init__(self, kind): | |
|
12 | self.kind = kind | |
|
13 | ||
|
14 | class MoveAction(AnsiAction): | |
|
15 | """ An AnsiAction for cursor move requests (CUU, CUD, CUF, CUB, CNL, CPL, | |
|
16 | CHA, and CUP commands). | |
|
17 | """ | |
|
18 | def __init__(self): | |
|
19 | raise NotImplementedError | |
|
20 | ||
|
21 | class EraseAction(AnsiAction): | |
|
22 | """ An AnsiAction for erase requests (ED and EL commands). | |
|
23 | """ | |
|
24 | def __init__(self, area, erase_to): | |
|
25 | super(EraseAction, self).__init__('erase') | |
|
26 | self.area = area | |
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27 | self.erase_to = erase_to | |
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28 | ||
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29 | ||
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8 | 30 | class AnsiCodeProcessor(object): |
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9 | 31 | """ Translates ANSI escape codes into readable attributes. |
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10 | 32 | """ |
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11 | 33 | |
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12 | 34 | # Protected class variables. |
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13 | 35 | _ansi_commands = 'ABCDEFGHJKSTfmnsu' |
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14 | 36 | _ansi_pattern = re.compile('\x01?\x1b\[(.*?)([%s])\x02?' % _ansi_commands) |
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15 | 37 | |
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16 | 38 | def __init__(self): |
|
17 |
self. |
|
|
39 | self.actions = [] | |
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40 | self.reset_sgr() | |
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18 | 41 | |
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19 | def reset(self): | |
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20 | """ Reset attributs to their default values. | |
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42 | def reset_sgr(self): | |
|
43 | """ Reset graphics attributs to their default values. | |
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21 | 44 | """ |
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22 | 45 | self.intensity = 0 |
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23 | 46 | self.italic = False |
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24 | 47 | self.bold = False |
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25 | 48 | self.underline = False |
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26 | 49 | self.foreground_color = None |
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27 | 50 | self.background_color = None |
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28 | 51 | |
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29 | 52 | def split_string(self, string): |
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30 | 53 | """ Yields substrings for which the same escape code applies. |
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31 | 54 | """ |
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55 | self.actions = [] | |
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32 | 56 | start = 0 |
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33 | 57 | |
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34 | 58 | for match in self._ansi_pattern.finditer(string): |
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35 | 59 | substring = string[start:match.start()] |
|
36 | if substring: | |
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60 | if substring or self.actions: | |
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37 | 61 | yield substring |
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38 | 62 | start = match.end() |
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39 | 63 | |
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40 | params = map(int, match.group(1).split(';')) | |
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41 | self.set_csi_code(match.group(2), params) | |
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64 | self.actions = [] | |
|
65 | try: | |
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66 | params = [] | |
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67 | for param in match.group(1).split(';'): | |
|
68 | if param: | |
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69 | params.append(int(param)) | |
|
70 | except ValueError: | |
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71 | # Silently discard badly formed escape codes. | |
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72 | pass | |
|
73 | else: | |
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74 | self.set_csi_code(match.group(2), params) | |
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42 | 75 | |
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43 | 76 | substring = string[start:] |
|
44 | if substring: | |
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77 | if substring or self.actions: | |
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45 | 78 | yield substring |
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46 | 79 | |
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47 | 80 | def set_csi_code(self, command, params=[]): |
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48 | 81 | """ Set attributes based on CSI (Control Sequence Introducer) code. |
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49 | 82 | |
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50 | 83 | Parameters |
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51 | 84 | ---------- |
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52 | 85 | command : str |
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53 | 86 | The code identifier, i.e. the final character in the sequence. |
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54 | 87 | |
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55 | 88 | params : sequence of integers, optional |
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56 | 89 | The parameter codes for the command. |
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57 | 90 | """ |
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58 | if command == 'm': # SGR - Select Graphic Rendition | |
|
91 | if command == 'm': # SGR - Select Graphic Rendition | |
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59 | 92 | for code in params: |
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60 | 93 | self.set_sgr_code(code) |
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94 | ||
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95 | elif (command == 'J' or # ED - Erase Data | |
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96 | command == 'K'): # EL - Erase in Line | |
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97 | code = params[0] if params else 0 | |
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98 | if 0 <= code <= 2: | |
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99 | area = 'screen' if command == 'J' else 'line' | |
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100 | if code == 0: | |
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101 | erase_to = 'end' | |
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102 | elif code == 1: | |
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103 | erase_to = 'start' | |
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104 | elif code == 2: | |
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105 | erase_to = 'all' | |
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106 | self.actions.append(EraseAction(area, erase_to)) | |
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61 | 107 | |
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62 | 108 | def set_sgr_code(self, code): |
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63 | 109 | """ Set attributes based on SGR (Select Graphic Rendition) code. |
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64 | 110 | """ |
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65 | 111 | if code == 0: |
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66 | self.reset() | |
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112 | self.reset_sgr() | |
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67 | 113 | elif code == 1: |
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68 | 114 | self.intensity = 1 |
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69 | 115 | self.bold = True |
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70 | 116 | elif code == 2: |
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71 | 117 | self.intensity = 0 |
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72 | 118 | elif code == 3: |
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73 | 119 | self.italic = True |
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74 | 120 | elif code == 4: |
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75 | 121 | self.underline = True |
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76 | 122 | elif code == 22: |
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77 | 123 | self.intensity = 0 |
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78 | 124 | self.bold = False |
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79 | 125 | elif code == 23: |
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80 | 126 | self.italic = False |
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81 | 127 | elif code == 24: |
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82 | 128 | self.underline = False |
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83 | 129 | elif code >= 30 and code <= 37: |
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84 | 130 | self.foreground_color = code - 30 |
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85 | 131 | elif code == 39: |
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86 | 132 | self.foreground_color = None |
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87 | 133 | elif code >= 40 and code <= 47: |
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88 | 134 | self.background_color = code - 40 |
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89 | 135 | elif code == 49: |
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90 | 136 | self.background_color = None |
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91 | 137 | |
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92 | 138 | |
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93 | 139 | class QtAnsiCodeProcessor(AnsiCodeProcessor): |
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94 | 140 | """ Translates ANSI escape codes into QTextCharFormats. |
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95 | 141 | """ |
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96 | 142 | |
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97 | 143 | # A map from color codes to RGB colors. |
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98 | 144 | ansi_colors = ( # Normal, Bright/Light |
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99 | 145 | ('#000000', '#7f7f7f'), # 0: black |
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100 | 146 | ('#cd0000', '#ff0000'), # 1: red |
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101 | 147 | ('#00cd00', '#00ff00'), # 2: green |
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102 | 148 | ('#cdcd00', '#ffff00'), # 3: yellow |
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103 | 149 | ('#0000ee', '#0000ff'), # 4: blue |
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104 | 150 | ('#cd00cd', '#ff00ff'), # 5: magenta |
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105 | 151 | ('#00cdcd', '#00ffff'), # 6: cyan |
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106 | 152 | ('#e5e5e5', '#ffffff')) # 7: white |
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107 | 153 | |
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108 | 154 | def get_format(self): |
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109 | 155 | """ Returns a QTextCharFormat that encodes the current style attributes. |
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110 | 156 | """ |
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111 | 157 | format = QtGui.QTextCharFormat() |
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112 | 158 | |
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113 | 159 | # Set foreground color |
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114 | 160 | if self.foreground_color is not None: |
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115 | 161 | color = self.ansi_colors[self.foreground_color][self.intensity] |
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116 | 162 | format.setForeground(QtGui.QColor(color)) |
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117 | 163 | |
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118 | 164 | # Set background color |
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119 | 165 | if self.background_color is not None: |
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120 | 166 | color = self.ansi_colors[self.background_color][self.intensity] |
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121 | 167 | format.setBackground(QtGui.QColor(color)) |
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122 | 168 | |
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123 | 169 | # Set font weight/style options |
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124 | 170 | if self.bold: |
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125 | 171 | format.setFontWeight(QtGui.QFont.Bold) |
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126 | 172 | else: |
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127 | 173 | format.setFontWeight(QtGui.QFont.Normal) |
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128 | 174 | format.setFontItalic(self.italic) |
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129 | 175 | format.setFontUnderline(self.underline) |
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130 | 176 | |
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131 | 177 | return format |
@@ -1,1231 +1,1235 b'' | |||
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1 | 1 | # Standard library imports |
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2 | 2 | import sys |
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3 | 3 | from textwrap import dedent |
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4 | 4 | |
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5 | 5 | # System library imports |
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6 | 6 | from PyQt4 import QtCore, QtGui |
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7 | 7 | |
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8 | 8 | # Local imports |
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9 | 9 | from ansi_code_processor import QtAnsiCodeProcessor |
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10 | 10 | from completion_widget import CompletionWidget |
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11 | 11 | |
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12 | 12 | |
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13 | 13 | class ConsoleWidget(QtGui.QWidget): |
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14 | 14 | """ An abstract base class for console-type widgets. This class has |
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15 | 15 | functionality for: |
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16 | 16 | |
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17 | 17 | * Maintaining a prompt and editing region |
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18 | 18 | * Providing the traditional Unix-style console keyboard shortcuts |
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19 | 19 | * Performing tab completion |
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20 | 20 | * Paging text |
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21 | 21 | * Handling ANSI escape codes |
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22 | 22 | |
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23 | 23 | ConsoleWidget also provides a number of utility methods that will be |
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24 | 24 | convenient to implementors of a console-style widget. |
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25 | 25 | """ |
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26 | 26 | |
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27 | 27 | # Whether to process ANSI escape codes. |
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28 | 28 | ansi_codes = True |
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29 | 29 | |
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30 | 30 | # The maximum number of lines of text before truncation. |
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31 | 31 | buffer_size = 500 |
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32 | 32 | |
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33 | 33 | # Whether to use a list widget or plain text output for tab completion. |
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34 | 34 | gui_completion = True |
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35 | 35 | |
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36 | 36 | # Whether to override ShortcutEvents for the keybindings defined by this |
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37 | 37 | # widget (Ctrl+n, Ctrl+a, etc). Enable this if you want this widget to take |
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38 | 38 | # priority (when it has focus) over, e.g., window-level menu shortcuts. |
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39 | 39 | override_shortcuts = False |
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40 | 40 | |
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41 | 41 | # Signals that indicate ConsoleWidget state. |
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42 | 42 | copy_available = QtCore.pyqtSignal(bool) |
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43 | 43 | redo_available = QtCore.pyqtSignal(bool) |
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44 | 44 | undo_available = QtCore.pyqtSignal(bool) |
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45 | 45 | |
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46 | 46 | # Signal emitted when paging is needed and the paging style has been |
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47 | 47 | # specified as 'custom'. |
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48 | 48 | custom_page_requested = QtCore.pyqtSignal(QtCore.QString) |
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49 | 49 | |
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50 | 50 | # Protected class variables. |
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51 | 51 | _ctrl_down_remap = { QtCore.Qt.Key_B : QtCore.Qt.Key_Left, |
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52 | 52 | QtCore.Qt.Key_F : QtCore.Qt.Key_Right, |
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53 | 53 | QtCore.Qt.Key_A : QtCore.Qt.Key_Home, |
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54 | 54 | QtCore.Qt.Key_E : QtCore.Qt.Key_End, |
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55 | 55 | QtCore.Qt.Key_P : QtCore.Qt.Key_Up, |
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56 | 56 | QtCore.Qt.Key_N : QtCore.Qt.Key_Down, |
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57 | 57 | QtCore.Qt.Key_D : QtCore.Qt.Key_Delete, } |
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58 | 58 | _shortcuts = set(_ctrl_down_remap.keys() + |
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59 | 59 | [ QtCore.Qt.Key_C, QtCore.Qt.Key_V ]) |
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60 | 60 | |
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61 | 61 | #--------------------------------------------------------------------------- |
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62 | 62 | # 'QObject' interface |
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63 | 63 | #--------------------------------------------------------------------------- |
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64 | 64 | |
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65 | 65 | def __init__(self, kind='plain', paging='inside', parent=None): |
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66 | 66 | """ Create a ConsoleWidget. |
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67 | 67 | |
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68 | 68 | Parameters |
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69 | 69 | ---------- |
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70 | 70 | kind : str, optional [default 'plain'] |
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71 | 71 | The type of underlying text widget to use. Valid values are 'plain', |
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72 | 72 | which specifies a QPlainTextEdit, and 'rich', which specifies a |
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73 | 73 | QTextEdit. |
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74 | 74 | |
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75 | 75 | paging : str, optional [default 'inside'] |
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76 | 76 | The type of paging to use. Valid values are: |
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77 | 77 | 'inside' : The widget pages like a traditional terminal pager. |
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78 | 78 | 'hsplit' : When paging is requested, the widget is split |
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79 | 79 | horizontally. The top pane contains the console, |
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80 | 80 | and the bottom pane contains the paged text. |
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81 | 81 | 'vsplit' : Similar to 'hsplit', except that a vertical splitter |
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82 | 82 | used. |
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83 | 83 | 'custom' : No action is taken by the widget beyond emitting a |
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84 | 84 | 'custom_page_requested(QString)' signal. |
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85 | 85 | 'none' : The text is written directly to the console. |
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86 | 86 | |
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87 | 87 | parent : QWidget, optional [default None] |
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88 | 88 | The parent for this widget. |
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89 | 89 | """ |
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90 | 90 | super(ConsoleWidget, self).__init__(parent) |
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91 | 91 | |
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92 | 92 | # Create the layout and underlying text widget. |
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93 | 93 | layout = QtGui.QStackedLayout(self) |
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94 | 94 | layout.setMargin(0) |
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95 | 95 | self._control = self._create_control(kind) |
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96 | 96 | self._page_control = None |
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97 | 97 | self._splitter = None |
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98 | 98 | if paging in ('hsplit', 'vsplit'): |
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99 | 99 | self._splitter = QtGui.QSplitter() |
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100 | 100 | if paging == 'hsplit': |
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101 | 101 | self._splitter.setOrientation(QtCore.Qt.Horizontal) |
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102 | 102 | else: |
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103 | 103 | self._splitter.setOrientation(QtCore.Qt.Vertical) |
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104 | 104 | self._splitter.addWidget(self._control) |
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105 | 105 | layout.addWidget(self._splitter) |
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106 | 106 | else: |
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107 | 107 | layout.addWidget(self._control) |
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108 | 108 | |
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109 | 109 | # Create the paging widget, if necessary. |
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110 | 110 | self._page_style = paging |
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111 | 111 | if paging in ('inside', 'hsplit', 'vsplit'): |
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112 | 112 | self._page_control = self._create_page_control() |
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113 | 113 | if self._splitter: |
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114 | 114 | self._page_control.hide() |
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115 | 115 | self._splitter.addWidget(self._page_control) |
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116 | 116 | else: |
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117 | 117 | layout.addWidget(self._page_control) |
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118 | 118 | elif paging not in ('custom', 'none'): |
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119 | 119 | raise ValueError('Paging style %s unknown.' % repr(paging)) |
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120 | 120 | |
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121 | 121 | # Initialize protected variables. Some variables contain useful state |
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122 | 122 | # information for subclasses; they should be considered read-only. |
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123 | 123 | self._ansi_processor = QtAnsiCodeProcessor() |
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124 | 124 | self._completion_widget = CompletionWidget(self._control) |
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125 | 125 | self._continuation_prompt = '> ' |
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126 | 126 | self._continuation_prompt_html = None |
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127 | 127 | self._executing = False |
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128 | 128 | self._prompt = '' |
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129 | 129 | self._prompt_html = None |
|
130 | 130 | self._prompt_pos = 0 |
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131 | 131 | self._reading = False |
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132 | 132 | self._reading_callback = None |
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133 | 133 | self._tab_width = 8 |
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134 | 134 | |
|
135 | 135 | # Set a monospaced font. |
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136 | 136 | self.reset_font() |
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137 | 137 | |
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138 | 138 | def eventFilter(self, obj, event): |
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139 | 139 | """ Reimplemented to ensure a console-like behavior in the underlying |
|
140 | 140 | text widget. |
|
141 | 141 | """ |
|
142 | 142 | # Re-map keys for all filtered widgets. |
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143 | 143 | etype = event.type() |
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144 | 144 | if etype == QtCore.QEvent.KeyPress and \ |
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145 | 145 | self._control_key_down(event.modifiers()) and \ |
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146 | 146 | event.key() in self._ctrl_down_remap: |
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147 | 147 | new_event = QtGui.QKeyEvent(QtCore.QEvent.KeyPress, |
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148 | 148 | self._ctrl_down_remap[event.key()], |
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149 | 149 | QtCore.Qt.NoModifier) |
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150 | 150 | QtGui.qApp.sendEvent(obj, new_event) |
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151 | 151 | return True |
|
152 | 152 | |
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153 | 153 | # Override shortucts for all filtered widgets. Note that on Mac OS it is |
|
154 | 154 | # always unnecessary to override shortcuts, hence the check below (users |
|
155 | 155 | # should just use the Control key instead of the Command key). |
|
156 | 156 | elif etype == QtCore.QEvent.ShortcutOverride and \ |
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157 | 157 | sys.platform != 'darwin' and \ |
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158 | 158 | self._control_key_down(event.modifiers()) and \ |
|
159 | 159 | event.key() in self._shortcuts: |
|
160 | 160 | event.accept() |
|
161 | 161 | return False |
|
162 | 162 | |
|
163 | 163 | elif obj == self._control: |
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164 | 164 | # Disable moving text by drag and drop. |
|
165 | 165 | if etype == QtCore.QEvent.DragMove: |
|
166 | 166 | return True |
|
167 | 167 | |
|
168 | 168 | elif etype == QtCore.QEvent.KeyPress: |
|
169 | 169 | return self._event_filter_console_keypress(event) |
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170 | 170 | |
|
171 | 171 | elif obj == self._page_control: |
|
172 | 172 | if etype == QtCore.QEvent.KeyPress: |
|
173 | 173 | return self._event_filter_page_keypress(event) |
|
174 | 174 | |
|
175 | 175 | return super(ConsoleWidget, self).eventFilter(obj, event) |
|
176 | 176 | |
|
177 | 177 | #--------------------------------------------------------------------------- |
|
178 | 178 | # 'QWidget' interface |
|
179 | 179 | #--------------------------------------------------------------------------- |
|
180 | 180 | |
|
181 | 181 | def sizeHint(self): |
|
182 | 182 | """ Reimplemented to suggest a size that is 80 characters wide and |
|
183 | 183 | 25 lines high. |
|
184 | 184 | """ |
|
185 | 185 | style = self.style() |
|
186 | 186 | opt = QtGui.QStyleOptionHeader() |
|
187 | 187 | font_metrics = QtGui.QFontMetrics(self.font) |
|
188 | 188 | splitwidth = style.pixelMetric(QtGui.QStyle.PM_SplitterWidth, opt, self) |
|
189 | 189 | |
|
190 | 190 | width = font_metrics.width(' ') * 80 |
|
191 | 191 | width += style.pixelMetric(QtGui.QStyle.PM_ScrollBarExtent, opt, self) |
|
192 | 192 | if self._page_style == 'hsplit': |
|
193 | 193 | width = width * 2 + splitwidth |
|
194 | 194 | |
|
195 | 195 | height = font_metrics.height() * 25 |
|
196 | 196 | if self._page_style == 'vsplit': |
|
197 | 197 | height = height * 2 + splitwidth |
|
198 | 198 | |
|
199 | 199 | return QtCore.QSize(width, height) |
|
200 | 200 | |
|
201 | 201 | #--------------------------------------------------------------------------- |
|
202 | 202 | # 'ConsoleWidget' public interface |
|
203 | 203 | #--------------------------------------------------------------------------- |
|
204 | 204 | |
|
205 | 205 | def can_paste(self): |
|
206 | 206 | """ Returns whether text can be pasted from the clipboard. |
|
207 | 207 | """ |
|
208 | 208 | # Accept only text that can be ASCII encoded. |
|
209 | 209 | if self._control.textInteractionFlags() & QtCore.Qt.TextEditable: |
|
210 | 210 | text = QtGui.QApplication.clipboard().text() |
|
211 | 211 | if not text.isEmpty(): |
|
212 | 212 | try: |
|
213 | 213 | str(text) |
|
214 | 214 | return True |
|
215 | 215 | except UnicodeEncodeError: |
|
216 | 216 | pass |
|
217 | 217 | return False |
|
218 | 218 | |
|
219 | 219 | def clear(self, keep_input=False): |
|
220 | 220 | """ Clear the console, then write a new prompt. If 'keep_input' is set, |
|
221 | 221 | restores the old input buffer when the new prompt is written. |
|
222 | 222 | """ |
|
223 | 223 | self._control.clear() |
|
224 | 224 | if keep_input: |
|
225 | 225 | input_buffer = self.input_buffer |
|
226 | 226 | self._show_prompt() |
|
227 | 227 | if keep_input: |
|
228 | 228 | self.input_buffer = input_buffer |
|
229 | 229 | |
|
230 | 230 | def copy(self): |
|
231 | 231 | """ Copy the current selected text to the clipboard. |
|
232 | 232 | """ |
|
233 | 233 | self._control.copy() |
|
234 | 234 | |
|
235 | 235 | def execute(self, source=None, hidden=False, interactive=False): |
|
236 | 236 | """ Executes source or the input buffer, possibly prompting for more |
|
237 | 237 | input. |
|
238 | 238 | |
|
239 | 239 | Parameters: |
|
240 | 240 | ----------- |
|
241 | 241 | source : str, optional |
|
242 | 242 | |
|
243 | 243 | The source to execute. If not specified, the input buffer will be |
|
244 | 244 | used. If specified and 'hidden' is False, the input buffer will be |
|
245 | 245 | replaced with the source before execution. |
|
246 | 246 | |
|
247 | 247 | hidden : bool, optional (default False) |
|
248 | 248 | |
|
249 | 249 | If set, no output will be shown and the prompt will not be modified. |
|
250 | 250 | In other words, it will be completely invisible to the user that |
|
251 | 251 | an execution has occurred. |
|
252 | 252 | |
|
253 | 253 | interactive : bool, optional (default False) |
|
254 | 254 | |
|
255 | 255 | Whether the console is to treat the source as having been manually |
|
256 | 256 | entered by the user. The effect of this parameter depends on the |
|
257 | 257 | subclass implementation. |
|
258 | 258 | |
|
259 | 259 | Raises: |
|
260 | 260 | ------- |
|
261 | 261 | RuntimeError |
|
262 | 262 | If incomplete input is given and 'hidden' is True. In this case, |
|
263 | 263 | it is not possible to prompt for more input. |
|
264 | 264 | |
|
265 | 265 | Returns: |
|
266 | 266 | -------- |
|
267 | 267 | A boolean indicating whether the source was executed. |
|
268 | 268 | """ |
|
269 | 269 | if not hidden: |
|
270 | 270 | if source is not None: |
|
271 | 271 | self.input_buffer = source |
|
272 | 272 | |
|
273 | 273 | self._append_plain_text('\n') |
|
274 | 274 | self._executing_input_buffer = self.input_buffer |
|
275 | 275 | self._executing = True |
|
276 | 276 | self._prompt_finished() |
|
277 | 277 | |
|
278 | 278 | real_source = self.input_buffer if source is None else source |
|
279 | 279 | complete = self._is_complete(real_source, interactive) |
|
280 | 280 | if complete: |
|
281 | 281 | if not hidden: |
|
282 | 282 | # The maximum block count is only in effect during execution. |
|
283 | 283 | # This ensures that _prompt_pos does not become invalid due to |
|
284 | 284 | # text truncation. |
|
285 | 285 | self._control.document().setMaximumBlockCount(self.buffer_size) |
|
286 | 286 | self._execute(real_source, hidden) |
|
287 | 287 | elif hidden: |
|
288 | 288 | raise RuntimeError('Incomplete noninteractive input: "%s"' % source) |
|
289 | 289 | else: |
|
290 | 290 | self._show_continuation_prompt() |
|
291 | 291 | |
|
292 | 292 | return complete |
|
293 | 293 | |
|
294 | 294 | def _get_input_buffer(self): |
|
295 | 295 | """ The text that the user has entered entered at the current prompt. |
|
296 | 296 | """ |
|
297 | 297 | # If we're executing, the input buffer may not even exist anymore due to |
|
298 | 298 | # the limit imposed by 'buffer_size'. Therefore, we store it. |
|
299 | 299 | if self._executing: |
|
300 | 300 | return self._executing_input_buffer |
|
301 | 301 | |
|
302 | 302 | cursor = self._get_end_cursor() |
|
303 | 303 | cursor.setPosition(self._prompt_pos, QtGui.QTextCursor.KeepAnchor) |
|
304 | 304 | input_buffer = str(cursor.selection().toPlainText()) |
|
305 | 305 | |
|
306 | 306 | # Strip out continuation prompts. |
|
307 | 307 | return input_buffer.replace('\n' + self._continuation_prompt, '\n') |
|
308 | 308 | |
|
309 | 309 | def _set_input_buffer(self, string): |
|
310 | 310 | """ Replaces the text in the input buffer with 'string'. |
|
311 | 311 | """ |
|
312 | 312 | # For now, it is an error to modify the input buffer during execution. |
|
313 | 313 | if self._executing: |
|
314 | 314 | raise RuntimeError("Cannot change input buffer during execution.") |
|
315 | 315 | |
|
316 | 316 | # Remove old text. |
|
317 | 317 | cursor = self._get_end_cursor() |
|
318 | 318 | cursor.beginEditBlock() |
|
319 | 319 | cursor.setPosition(self._prompt_pos, QtGui.QTextCursor.KeepAnchor) |
|
320 | 320 | cursor.removeSelectedText() |
|
321 | 321 | |
|
322 | 322 | # Insert new text with continuation prompts. |
|
323 | 323 | lines = string.splitlines(True) |
|
324 | 324 | if lines: |
|
325 | 325 | self._append_plain_text(lines[0]) |
|
326 | 326 | for i in xrange(1, len(lines)): |
|
327 | 327 | if self._continuation_prompt_html is None: |
|
328 | 328 | self._append_plain_text(self._continuation_prompt) |
|
329 | 329 | else: |
|
330 | 330 | self._append_html(self._continuation_prompt_html) |
|
331 | 331 | self._append_plain_text(lines[i]) |
|
332 | 332 | cursor.endEditBlock() |
|
333 | 333 | self._control.moveCursor(QtGui.QTextCursor.End) |
|
334 | 334 | |
|
335 | 335 | input_buffer = property(_get_input_buffer, _set_input_buffer) |
|
336 | 336 | |
|
337 | 337 | def _get_font(self): |
|
338 | 338 | """ The base font being used by the ConsoleWidget. |
|
339 | 339 | """ |
|
340 | 340 | return self._control.document().defaultFont() |
|
341 | 341 | |
|
342 | 342 | def _set_font(self, font): |
|
343 | 343 | """ Sets the base font for the ConsoleWidget to the specified QFont. |
|
344 | 344 | """ |
|
345 | 345 | font_metrics = QtGui.QFontMetrics(font) |
|
346 | 346 | self._control.setTabStopWidth(self.tab_width * font_metrics.width(' ')) |
|
347 | 347 | |
|
348 | 348 | self._completion_widget.setFont(font) |
|
349 | 349 | self._control.document().setDefaultFont(font) |
|
350 | 350 | if self._page_control: |
|
351 | 351 | self._page_control.document().setDefaultFont(font) |
|
352 | 352 | |
|
353 | 353 | font = property(_get_font, _set_font) |
|
354 | 354 | |
|
355 | 355 | def paste(self): |
|
356 | 356 | """ Paste the contents of the clipboard into the input region. |
|
357 | 357 | """ |
|
358 | 358 | if self._control.textInteractionFlags() & QtCore.Qt.TextEditable: |
|
359 | 359 | try: |
|
360 | 360 | text = str(QtGui.QApplication.clipboard().text()) |
|
361 | 361 | except UnicodeEncodeError: |
|
362 | 362 | pass |
|
363 | 363 | else: |
|
364 | 364 | self._insert_into_buffer(dedent(text)) |
|
365 | 365 | |
|
366 | 366 | def print_(self, printer): |
|
367 | 367 | """ Print the contents of the ConsoleWidget to the specified QPrinter. |
|
368 | 368 | """ |
|
369 | 369 | self._control.print_(printer) |
|
370 | 370 | |
|
371 | 371 | def redo(self): |
|
372 | 372 | """ Redo the last operation. If there is no operation to redo, nothing |
|
373 | 373 | happens. |
|
374 | 374 | """ |
|
375 | 375 | self._control.redo() |
|
376 | 376 | |
|
377 | 377 | def reset_font(self): |
|
378 | 378 | """ Sets the font to the default fixed-width font for this platform. |
|
379 | 379 | """ |
|
380 | 380 | if sys.platform == 'win32': |
|
381 | 381 | name = 'Courier' |
|
382 | 382 | elif sys.platform == 'darwin': |
|
383 | 383 | name = 'Monaco' |
|
384 | 384 | else: |
|
385 | 385 | name = 'Monospace' |
|
386 | 386 | font = QtGui.QFont(name, QtGui.qApp.font().pointSize()) |
|
387 | 387 | font.setStyleHint(QtGui.QFont.TypeWriter) |
|
388 | 388 | self._set_font(font) |
|
389 | 389 | |
|
390 | 390 | def select_all(self): |
|
391 | 391 | """ Selects all the text in the buffer. |
|
392 | 392 | """ |
|
393 | 393 | self._control.selectAll() |
|
394 | 394 | |
|
395 | 395 | def _get_tab_width(self): |
|
396 | 396 | """ The width (in terms of space characters) for tab characters. |
|
397 | 397 | """ |
|
398 | 398 | return self._tab_width |
|
399 | 399 | |
|
400 | 400 | def _set_tab_width(self, tab_width): |
|
401 | 401 | """ Sets the width (in terms of space characters) for tab characters. |
|
402 | 402 | """ |
|
403 | 403 | font_metrics = QtGui.QFontMetrics(self.font) |
|
404 | 404 | self._control.setTabStopWidth(tab_width * font_metrics.width(' ')) |
|
405 | 405 | |
|
406 | 406 | self._tab_width = tab_width |
|
407 | 407 | |
|
408 | 408 | tab_width = property(_get_tab_width, _set_tab_width) |
|
409 | 409 | |
|
410 | 410 | def undo(self): |
|
411 | 411 | """ Undo the last operation. If there is no operation to undo, nothing |
|
412 | 412 | happens. |
|
413 | 413 | """ |
|
414 | 414 | self._control.undo() |
|
415 | 415 | |
|
416 | 416 | #--------------------------------------------------------------------------- |
|
417 | 417 | # 'ConsoleWidget' abstract interface |
|
418 | 418 | #--------------------------------------------------------------------------- |
|
419 | 419 | |
|
420 | 420 | def _is_complete(self, source, interactive): |
|
421 | 421 | """ Returns whether 'source' can be executed. When triggered by an |
|
422 | 422 | Enter/Return key press, 'interactive' is True; otherwise, it is |
|
423 | 423 | False. |
|
424 | 424 | """ |
|
425 | 425 | raise NotImplementedError |
|
426 | 426 | |
|
427 | 427 | def _execute(self, source, hidden): |
|
428 | 428 | """ Execute 'source'. If 'hidden', do not show any output. |
|
429 | 429 | """ |
|
430 | 430 | raise NotImplementedError |
|
431 | 431 | |
|
432 | 432 | def _execute_interrupt(self): |
|
433 | 433 | """ Attempts to stop execution. Returns whether this method has an |
|
434 | 434 | implementation. |
|
435 | 435 | """ |
|
436 | 436 | return False |
|
437 | 437 | |
|
438 | 438 | def _prompt_started_hook(self): |
|
439 | 439 | """ Called immediately after a new prompt is displayed. |
|
440 | 440 | """ |
|
441 | 441 | pass |
|
442 | 442 | |
|
443 | 443 | def _prompt_finished_hook(self): |
|
444 | 444 | """ Called immediately after a prompt is finished, i.e. when some input |
|
445 | 445 | will be processed and a new prompt displayed. |
|
446 | 446 | """ |
|
447 | 447 | pass |
|
448 | 448 | |
|
449 | 449 | def _up_pressed(self): |
|
450 | 450 | """ Called when the up key is pressed. Returns whether to continue |
|
451 | 451 | processing the event. |
|
452 | 452 | """ |
|
453 | 453 | return True |
|
454 | 454 | |
|
455 | 455 | def _down_pressed(self): |
|
456 | 456 | """ Called when the down key is pressed. Returns whether to continue |
|
457 | 457 | processing the event. |
|
458 | 458 | """ |
|
459 | 459 | return True |
|
460 | 460 | |
|
461 | 461 | def _tab_pressed(self): |
|
462 | 462 | """ Called when the tab key is pressed. Returns whether to continue |
|
463 | 463 | processing the event. |
|
464 | 464 | """ |
|
465 | 465 | return False |
|
466 | 466 | |
|
467 | 467 | #-------------------------------------------------------------------------- |
|
468 | 468 | # 'ConsoleWidget' protected interface |
|
469 | 469 | #-------------------------------------------------------------------------- |
|
470 | 470 | |
|
471 | 471 | def _append_html(self, html): |
|
472 | 472 | """ Appends html at the end of the console buffer. |
|
473 | 473 | """ |
|
474 | 474 | cursor = self._get_end_cursor() |
|
475 | 475 | self._insert_html(cursor, html) |
|
476 | 476 | |
|
477 | 477 | def _append_html_fetching_plain_text(self, html): |
|
478 | 478 | """ Appends 'html', then returns the plain text version of it. |
|
479 | 479 | """ |
|
480 | 480 | anchor = self._get_end_cursor().position() |
|
481 | 481 | self._append_html(html) |
|
482 | 482 | cursor = self._get_end_cursor() |
|
483 | 483 | cursor.setPosition(anchor, QtGui.QTextCursor.KeepAnchor) |
|
484 | 484 | return str(cursor.selection().toPlainText()) |
|
485 | 485 | |
|
486 | 486 | def _append_plain_text(self, text): |
|
487 | 487 | """ Appends plain text at the end of the console buffer, processing |
|
488 | 488 | ANSI codes if enabled. |
|
489 | 489 | """ |
|
490 | 490 | cursor = self._get_end_cursor() |
|
491 | 491 | self._insert_plain_text(cursor, text) |
|
492 | 492 | |
|
493 | 493 | def _append_plain_text_keeping_prompt(self, text): |
|
494 | 494 | """ Writes 'text' after the current prompt, then restores the old prompt |
|
495 | 495 | with its old input buffer. |
|
496 | 496 | """ |
|
497 | 497 | input_buffer = self.input_buffer |
|
498 | 498 | self._append_plain_text('\n') |
|
499 | 499 | self._prompt_finished() |
|
500 | 500 | |
|
501 | 501 | self._append_plain_text(text) |
|
502 | 502 | self._show_prompt() |
|
503 | 503 | self.input_buffer = input_buffer |
|
504 | 504 | |
|
505 | 505 | def _complete_with_items(self, cursor, items): |
|
506 | 506 | """ Performs completion with 'items' at the specified cursor location. |
|
507 | 507 | """ |
|
508 | 508 | if len(items) == 1: |
|
509 | 509 | cursor.setPosition(self._control.textCursor().position(), |
|
510 | 510 | QtGui.QTextCursor.KeepAnchor) |
|
511 | 511 | cursor.insertText(items[0]) |
|
512 | 512 | elif len(items) > 1: |
|
513 | 513 | if self.gui_completion: |
|
514 | 514 | self._completion_widget.show_items(cursor, items) |
|
515 | 515 | else: |
|
516 | 516 | text = self._format_as_columns(items) |
|
517 | 517 | self._append_plain_text_keeping_prompt(text) |
|
518 | 518 | |
|
519 | 519 | def _control_key_down(self, modifiers): |
|
520 | 520 | """ Given a KeyboardModifiers flags object, return whether the Control |
|
521 | 521 | key is down (on Mac OS, treat the Command key as a synonym for |
|
522 | 522 | Control). |
|
523 | 523 | """ |
|
524 | 524 | down = bool(modifiers & QtCore.Qt.ControlModifier) |
|
525 | 525 | |
|
526 | 526 | # Note: on Mac OS, ControlModifier corresponds to the Command key while |
|
527 | 527 | # MetaModifier corresponds to the Control key. |
|
528 | 528 | if sys.platform == 'darwin': |
|
529 | 529 | down = down ^ bool(modifiers & QtCore.Qt.MetaModifier) |
|
530 | 530 | |
|
531 | 531 | return down |
|
532 | 532 | |
|
533 | 533 | def _create_control(self, kind): |
|
534 | 534 | """ Creates and connects the underlying text widget. |
|
535 | 535 | """ |
|
536 | 536 | if kind == 'plain': |
|
537 | 537 | control = QtGui.QPlainTextEdit() |
|
538 | 538 | elif kind == 'rich': |
|
539 | 539 | control = QtGui.QTextEdit() |
|
540 | 540 | control.setAcceptRichText(False) |
|
541 | 541 | else: |
|
542 | 542 | raise ValueError("Kind %s unknown." % repr(kind)) |
|
543 | 543 | control.installEventFilter(self) |
|
544 | 544 | control.setContextMenuPolicy(QtCore.Qt.CustomContextMenu) |
|
545 | 545 | control.customContextMenuRequested.connect(self._show_context_menu) |
|
546 | 546 | control.copyAvailable.connect(self.copy_available) |
|
547 | 547 | control.redoAvailable.connect(self.redo_available) |
|
548 | 548 | control.undoAvailable.connect(self.undo_available) |
|
549 | 549 | control.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn) |
|
550 | 550 | return control |
|
551 | 551 | |
|
552 | 552 | def _create_page_control(self): |
|
553 | 553 | """ Creates and connects the underlying paging widget. |
|
554 | 554 | """ |
|
555 | 555 | control = QtGui.QPlainTextEdit() |
|
556 | 556 | control.installEventFilter(self) |
|
557 | 557 | control.setReadOnly(True) |
|
558 | 558 | control.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn) |
|
559 | 559 | return control |
|
560 | 560 | |
|
561 | 561 | def _event_filter_console_keypress(self, event): |
|
562 | 562 | """ Filter key events for the underlying text widget to create a |
|
563 | 563 | console-like interface. |
|
564 | 564 | """ |
|
565 | 565 | intercepted = False |
|
566 | 566 | cursor = self._control.textCursor() |
|
567 | 567 | position = cursor.position() |
|
568 | 568 | key = event.key() |
|
569 | 569 | ctrl_down = self._control_key_down(event.modifiers()) |
|
570 | 570 | alt_down = event.modifiers() & QtCore.Qt.AltModifier |
|
571 | 571 | shift_down = event.modifiers() & QtCore.Qt.ShiftModifier |
|
572 | 572 | |
|
573 | 573 | if event.matches(QtGui.QKeySequence.Paste): |
|
574 | 574 | # Call our paste instead of the underlying text widget's. |
|
575 | 575 | self.paste() |
|
576 | 576 | intercepted = True |
|
577 | 577 | |
|
578 | 578 | elif ctrl_down: |
|
579 | 579 | if key == QtCore.Qt.Key_C: |
|
580 | 580 | intercepted = self._executing and self._execute_interrupt() |
|
581 | 581 | |
|
582 | 582 | elif key == QtCore.Qt.Key_K: |
|
583 | 583 | if self._in_buffer(position): |
|
584 | 584 | cursor.movePosition(QtGui.QTextCursor.EndOfLine, |
|
585 | 585 | QtGui.QTextCursor.KeepAnchor) |
|
586 | 586 | cursor.removeSelectedText() |
|
587 | 587 | intercepted = True |
|
588 | 588 | |
|
589 | 589 | elif key == QtCore.Qt.Key_X: |
|
590 | 590 | intercepted = True |
|
591 | 591 | |
|
592 | 592 | elif key == QtCore.Qt.Key_Y: |
|
593 | 593 | self.paste() |
|
594 | 594 | intercepted = True |
|
595 | 595 | |
|
596 | 596 | elif alt_down: |
|
597 | 597 | if key == QtCore.Qt.Key_B: |
|
598 | 598 | self._set_cursor(self._get_word_start_cursor(position)) |
|
599 | 599 | intercepted = True |
|
600 | 600 | |
|
601 | 601 | elif key == QtCore.Qt.Key_F: |
|
602 | 602 | self._set_cursor(self._get_word_end_cursor(position)) |
|
603 | 603 | intercepted = True |
|
604 | 604 | |
|
605 | 605 | elif key == QtCore.Qt.Key_Backspace: |
|
606 | 606 | cursor = self._get_word_start_cursor(position) |
|
607 | 607 | cursor.setPosition(position, QtGui.QTextCursor.KeepAnchor) |
|
608 | 608 | cursor.removeSelectedText() |
|
609 | 609 | intercepted = True |
|
610 | 610 | |
|
611 | 611 | elif key == QtCore.Qt.Key_D: |
|
612 | 612 | cursor = self._get_word_end_cursor(position) |
|
613 | 613 | cursor.setPosition(position, QtGui.QTextCursor.KeepAnchor) |
|
614 | 614 | cursor.removeSelectedText() |
|
615 | 615 | intercepted = True |
|
616 | 616 | |
|
617 | 617 | else: |
|
618 | 618 | if key in (QtCore.Qt.Key_Return, QtCore.Qt.Key_Enter): |
|
619 | 619 | if self._reading: |
|
620 | 620 | self._append_plain_text('\n') |
|
621 | 621 | self._reading = False |
|
622 | 622 | if self._reading_callback: |
|
623 | 623 | self._reading_callback() |
|
624 | 624 | elif not self._executing: |
|
625 | 625 | self.execute(interactive=True) |
|
626 | 626 | intercepted = True |
|
627 | 627 | |
|
628 | 628 | elif key == QtCore.Qt.Key_Up: |
|
629 | 629 | if self._reading or not self._up_pressed(): |
|
630 | 630 | intercepted = True |
|
631 | 631 | else: |
|
632 | 632 | prompt_line = self._get_prompt_cursor().blockNumber() |
|
633 | 633 | intercepted = cursor.blockNumber() <= prompt_line |
|
634 | 634 | |
|
635 | 635 | elif key == QtCore.Qt.Key_Down: |
|
636 | 636 | if self._reading or not self._down_pressed(): |
|
637 | 637 | intercepted = True |
|
638 | 638 | else: |
|
639 | 639 | end_line = self._get_end_cursor().blockNumber() |
|
640 | 640 | intercepted = cursor.blockNumber() == end_line |
|
641 | 641 | |
|
642 | 642 | elif key == QtCore.Qt.Key_Tab: |
|
643 | 643 | if self._reading: |
|
644 | 644 | intercepted = False |
|
645 | 645 | else: |
|
646 | 646 | intercepted = not self._tab_pressed() |
|
647 | 647 | |
|
648 | 648 | elif key == QtCore.Qt.Key_Left: |
|
649 | 649 | intercepted = not self._in_buffer(position - 1) |
|
650 | 650 | |
|
651 | 651 | elif key == QtCore.Qt.Key_Home: |
|
652 | 652 | cursor.movePosition(QtGui.QTextCursor.StartOfBlock) |
|
653 | 653 | start_line = cursor.blockNumber() |
|
654 | 654 | if start_line == self._get_prompt_cursor().blockNumber(): |
|
655 | 655 | start_pos = self._prompt_pos |
|
656 | 656 | else: |
|
657 | 657 | start_pos = cursor.position() |
|
658 | 658 | start_pos += len(self._continuation_prompt) |
|
659 | 659 | if shift_down and self._in_buffer(position): |
|
660 | 660 | self._set_selection(position, start_pos) |
|
661 | 661 | else: |
|
662 | 662 | self._set_position(start_pos) |
|
663 | 663 | intercepted = True |
|
664 | 664 | |
|
665 | 665 | elif key == QtCore.Qt.Key_Backspace: |
|
666 | 666 | |
|
667 | 667 | # Line deletion (remove continuation prompt) |
|
668 | 668 | len_prompt = len(self._continuation_prompt) |
|
669 | 669 | if not self._reading and \ |
|
670 | 670 | cursor.columnNumber() == len_prompt and \ |
|
671 | 671 | position != self._prompt_pos: |
|
672 | 672 | cursor.movePosition(QtGui.QTextCursor.StartOfBlock, |
|
673 | 673 | QtGui.QTextCursor.KeepAnchor) |
|
674 | 674 | cursor.removeSelectedText() |
|
675 | 675 | |
|
676 | 676 | # Regular backwards deletion |
|
677 | 677 | else: |
|
678 | 678 | anchor = cursor.anchor() |
|
679 | 679 | if anchor == position: |
|
680 | 680 | intercepted = not self._in_buffer(position - 1) |
|
681 | 681 | else: |
|
682 | 682 | intercepted = not self._in_buffer(min(anchor, position)) |
|
683 | 683 | |
|
684 | 684 | elif key == QtCore.Qt.Key_Delete: |
|
685 | 685 | anchor = cursor.anchor() |
|
686 | 686 | intercepted = not self._in_buffer(min(anchor, position)) |
|
687 | 687 | |
|
688 | 688 | # Don't move the cursor if control is down to allow copy-paste using |
|
689 | 689 | # the keyboard in any part of the buffer. |
|
690 | 690 | if not ctrl_down: |
|
691 | 691 | self._keep_cursor_in_buffer() |
|
692 | 692 | |
|
693 | 693 | return intercepted |
|
694 | 694 | |
|
695 | 695 | def _event_filter_page_keypress(self, event): |
|
696 | 696 | """ Filter key events for the paging widget to create console-like |
|
697 | 697 | interface. |
|
698 | 698 | """ |
|
699 | 699 | key = event.key() |
|
700 | 700 | |
|
701 | 701 | if key in (QtCore.Qt.Key_Q, QtCore.Qt.Key_Escape): |
|
702 | 702 | if self._splitter: |
|
703 | 703 | self._page_control.hide() |
|
704 | 704 | else: |
|
705 | 705 | self.layout().setCurrentWidget(self._control) |
|
706 | 706 | return True |
|
707 | 707 | |
|
708 | 708 | elif key in (QtCore.Qt.Key_Enter, QtCore.Qt.Key_Return): |
|
709 | 709 | new_event = QtGui.QKeyEvent(QtCore.QEvent.KeyPress, |
|
710 | 710 | QtCore.Qt.Key_Down, |
|
711 | 711 | QtCore.Qt.NoModifier) |
|
712 | 712 | QtGui.qApp.sendEvent(self._page_control, new_event) |
|
713 | 713 | return True |
|
714 | 714 | |
|
715 | 715 | return False |
|
716 | 716 | |
|
717 | 717 | def _format_as_columns(self, items, separator=' '): |
|
718 | 718 | """ Transform a list of strings into a single string with columns. |
|
719 | 719 | |
|
720 | 720 | Parameters |
|
721 | 721 | ---------- |
|
722 | 722 | items : sequence of strings |
|
723 | 723 | The strings to process. |
|
724 | 724 | |
|
725 | 725 | separator : str, optional [default is two spaces] |
|
726 | 726 | The string that separates columns. |
|
727 | 727 | |
|
728 | 728 | Returns |
|
729 | 729 | ------- |
|
730 | 730 | The formatted string. |
|
731 | 731 | """ |
|
732 | 732 | # Note: this code is adapted from columnize 0.3.2. |
|
733 | 733 | # See http://code.google.com/p/pycolumnize/ |
|
734 | 734 | |
|
735 | 735 | width = self._control.viewport().width() |
|
736 | 736 | char_width = QtGui.QFontMetrics(self.font).width(' ') |
|
737 | 737 | displaywidth = max(5, width / char_width) |
|
738 | 738 | |
|
739 | 739 | # Some degenerate cases. |
|
740 | 740 | size = len(items) |
|
741 | 741 | if size == 0: |
|
742 | 742 | return '\n' |
|
743 | 743 | elif size == 1: |
|
744 | 744 | return '%s\n' % str(items[0]) |
|
745 | 745 | |
|
746 | 746 | # Try every row count from 1 upwards |
|
747 | 747 | array_index = lambda nrows, row, col: nrows*col + row |
|
748 | 748 | for nrows in range(1, size): |
|
749 | 749 | ncols = (size + nrows - 1) // nrows |
|
750 | 750 | colwidths = [] |
|
751 | 751 | totwidth = -len(separator) |
|
752 | 752 | for col in range(ncols): |
|
753 | 753 | # Get max column width for this column |
|
754 | 754 | colwidth = 0 |
|
755 | 755 | for row in range(nrows): |
|
756 | 756 | i = array_index(nrows, row, col) |
|
757 | 757 | if i >= size: break |
|
758 | 758 | x = items[i] |
|
759 | 759 | colwidth = max(colwidth, len(x)) |
|
760 | 760 | colwidths.append(colwidth) |
|
761 | 761 | totwidth += colwidth + len(separator) |
|
762 | 762 | if totwidth > displaywidth: |
|
763 | 763 | break |
|
764 | 764 | if totwidth <= displaywidth: |
|
765 | 765 | break |
|
766 | 766 | |
|
767 | 767 | # The smallest number of rows computed and the max widths for each |
|
768 | 768 | # column has been obtained. Now we just have to format each of the rows. |
|
769 | 769 | string = '' |
|
770 | 770 | for row in range(nrows): |
|
771 | 771 | texts = [] |
|
772 | 772 | for col in range(ncols): |
|
773 | 773 | i = row + nrows*col |
|
774 | 774 | if i >= size: |
|
775 | 775 | texts.append('') |
|
776 | 776 | else: |
|
777 | 777 | texts.append(items[i]) |
|
778 | 778 | while texts and not texts[-1]: |
|
779 | 779 | del texts[-1] |
|
780 | 780 | for col in range(len(texts)): |
|
781 | 781 | texts[col] = texts[col].ljust(colwidths[col]) |
|
782 | 782 | string += '%s\n' % str(separator.join(texts)) |
|
783 | 783 | return string |
|
784 | 784 | |
|
785 | 785 | def _get_block_plain_text(self, block): |
|
786 | 786 | """ Given a QTextBlock, return its unformatted text. |
|
787 | 787 | """ |
|
788 | 788 | cursor = QtGui.QTextCursor(block) |
|
789 | 789 | cursor.movePosition(QtGui.QTextCursor.StartOfBlock) |
|
790 | 790 | cursor.movePosition(QtGui.QTextCursor.EndOfBlock, |
|
791 | 791 | QtGui.QTextCursor.KeepAnchor) |
|
792 | 792 | return str(cursor.selection().toPlainText()) |
|
793 | 793 | |
|
794 | 794 | def _get_cursor(self): |
|
795 | 795 | """ Convenience method that returns a cursor for the current position. |
|
796 | 796 | """ |
|
797 | 797 | return self._control.textCursor() |
|
798 | 798 | |
|
799 | 799 | def _get_end_cursor(self): |
|
800 | 800 | """ Convenience method that returns a cursor for the last character. |
|
801 | 801 | """ |
|
802 | 802 | cursor = self._control.textCursor() |
|
803 | 803 | cursor.movePosition(QtGui.QTextCursor.End) |
|
804 | 804 | return cursor |
|
805 | 805 | |
|
806 | 806 | def _get_input_buffer_cursor_line(self): |
|
807 | 807 | """ The text in the line of the input buffer in which the user's cursor |
|
808 | 808 | rests. Returns a string if there is such a line; otherwise, None. |
|
809 | 809 | """ |
|
810 | 810 | if self._executing: |
|
811 | 811 | return None |
|
812 | 812 | cursor = self._control.textCursor() |
|
813 | 813 | if cursor.position() >= self._prompt_pos: |
|
814 | 814 | text = self._get_block_plain_text(cursor.block()) |
|
815 | 815 | if cursor.blockNumber() == self._get_prompt_cursor().blockNumber(): |
|
816 | 816 | return text[len(self._prompt):] |
|
817 | 817 | else: |
|
818 | 818 | return text[len(self._continuation_prompt):] |
|
819 | 819 | else: |
|
820 | 820 | return None |
|
821 | 821 | |
|
822 | 822 | def _get_prompt_cursor(self): |
|
823 | 823 | """ Convenience method that returns a cursor for the prompt position. |
|
824 | 824 | """ |
|
825 | 825 | cursor = self._control.textCursor() |
|
826 | 826 | cursor.setPosition(self._prompt_pos) |
|
827 | 827 | return cursor |
|
828 | 828 | |
|
829 | 829 | def _get_selection_cursor(self, start, end): |
|
830 | 830 | """ Convenience method that returns a cursor with text selected between |
|
831 | 831 | the positions 'start' and 'end'. |
|
832 | 832 | """ |
|
833 | 833 | cursor = self._control.textCursor() |
|
834 | 834 | cursor.setPosition(start) |
|
835 | 835 | cursor.setPosition(end, QtGui.QTextCursor.KeepAnchor) |
|
836 | 836 | return cursor |
|
837 | 837 | |
|
838 | 838 | def _get_word_start_cursor(self, position): |
|
839 | 839 | """ Find the start of the word to the left the given position. If a |
|
840 | 840 | sequence of non-word characters precedes the first word, skip over |
|
841 | 841 | them. (This emulates the behavior of bash, emacs, etc.) |
|
842 | 842 | """ |
|
843 | 843 | document = self._control.document() |
|
844 | 844 | position -= 1 |
|
845 | 845 | while position >= self._prompt_pos and \ |
|
846 | 846 | not document.characterAt(position).isLetterOrNumber(): |
|
847 | 847 | position -= 1 |
|
848 | 848 | while position >= self._prompt_pos and \ |
|
849 | 849 | document.characterAt(position).isLetterOrNumber(): |
|
850 | 850 | position -= 1 |
|
851 | 851 | cursor = self._control.textCursor() |
|
852 | 852 | cursor.setPosition(position + 1) |
|
853 | 853 | return cursor |
|
854 | 854 | |
|
855 | 855 | def _get_word_end_cursor(self, position): |
|
856 | 856 | """ Find the end of the word to the right the given position. If a |
|
857 | 857 | sequence of non-word characters precedes the first word, skip over |
|
858 | 858 | them. (This emulates the behavior of bash, emacs, etc.) |
|
859 | 859 | """ |
|
860 | 860 | document = self._control.document() |
|
861 | 861 | end = self._get_end_cursor().position() |
|
862 | 862 | while position < end and \ |
|
863 | 863 | not document.characterAt(position).isLetterOrNumber(): |
|
864 | 864 | position += 1 |
|
865 | 865 | while position < end and \ |
|
866 | 866 | document.characterAt(position).isLetterOrNumber(): |
|
867 | 867 | position += 1 |
|
868 | 868 | cursor = self._control.textCursor() |
|
869 | 869 | cursor.setPosition(position) |
|
870 | 870 | return cursor |
|
871 | 871 | |
|
872 | 872 | def _insert_html(self, cursor, html): |
|
873 | 873 | """ Insert HTML using the specified cursor in such a way that future |
|
874 | 874 | formatting is unaffected. |
|
875 | 875 | """ |
|
876 | 876 | cursor.beginEditBlock() |
|
877 | 877 | cursor.insertHtml(html) |
|
878 | 878 | |
|
879 | 879 | # After inserting HTML, the text document "remembers" it's in "html |
|
880 | 880 | # mode", which means that subsequent calls adding plain text will result |
|
881 | 881 | # in unwanted formatting, lost tab characters, etc. The following code |
|
882 | 882 | # hacks around this behavior, which I consider to be a bug in Qt. |
|
883 | 883 | cursor.movePosition(QtGui.QTextCursor.Left, |
|
884 | 884 | QtGui.QTextCursor.KeepAnchor) |
|
885 | 885 | if cursor.selection().toPlainText() == ' ': |
|
886 | 886 | cursor.removeSelectedText() |
|
887 | 887 | cursor.movePosition(QtGui.QTextCursor.Right) |
|
888 | 888 | cursor.insertText(' ', QtGui.QTextCharFormat()) |
|
889 | 889 | cursor.endEditBlock() |
|
890 | 890 | |
|
891 | 891 | def _insert_plain_text(self, cursor, text): |
|
892 | 892 | """ Inserts plain text using the specified cursor, processing ANSI codes |
|
893 | 893 | if enabled. |
|
894 | 894 | """ |
|
895 | 895 | cursor.beginEditBlock() |
|
896 | 896 | if self.ansi_codes: |
|
897 | 897 | for substring in self._ansi_processor.split_string(text): |
|
898 | for action in self._ansi_processor.actions: | |
|
899 | if action.kind == 'erase' and action.area == 'screen': | |
|
900 | cursor.select(QtGui.QTextCursor.Document) | |
|
901 | cursor.removeSelectedText() | |
|
898 | 902 | format = self._ansi_processor.get_format() |
|
899 | 903 | cursor.insertText(substring, format) |
|
900 | 904 | else: |
|
901 | 905 | cursor.insertText(text) |
|
902 | 906 | cursor.endEditBlock() |
|
903 | 907 | |
|
904 | 908 | def _insert_into_buffer(self, text): |
|
905 | 909 | """ Inserts text into the input buffer at the current cursor position, |
|
906 | 910 | ensuring that continuation prompts are inserted as necessary. |
|
907 | 911 | """ |
|
908 | 912 | lines = str(text).splitlines(True) |
|
909 | 913 | if lines: |
|
910 | 914 | self._keep_cursor_in_buffer() |
|
911 | 915 | cursor = self._control.textCursor() |
|
912 | 916 | cursor.beginEditBlock() |
|
913 | 917 | cursor.insertText(lines[0]) |
|
914 | 918 | for line in lines[1:]: |
|
915 | 919 | if self._continuation_prompt_html is None: |
|
916 | 920 | cursor.insertText(self._continuation_prompt) |
|
917 | 921 | else: |
|
918 | 922 | self._insert_html(cursor, self._continuation_prompt_html) |
|
919 | 923 | cursor.insertText(line) |
|
920 | 924 | cursor.endEditBlock() |
|
921 | 925 | self._control.setTextCursor(cursor) |
|
922 | 926 | |
|
923 | 927 | def _in_buffer(self, position): |
|
924 | 928 | """ Returns whether the given position is inside the editing region. |
|
925 | 929 | """ |
|
926 | 930 | cursor = self._control.textCursor() |
|
927 | 931 | cursor.setPosition(position) |
|
928 | 932 | line = cursor.blockNumber() |
|
929 | 933 | prompt_line = self._get_prompt_cursor().blockNumber() |
|
930 | 934 | if line == prompt_line: |
|
931 | 935 | return position >= self._prompt_pos |
|
932 | 936 | elif line > prompt_line: |
|
933 | 937 | cursor.movePosition(QtGui.QTextCursor.StartOfBlock) |
|
934 | 938 | prompt_pos = cursor.position() + len(self._continuation_prompt) |
|
935 | 939 | return position >= prompt_pos |
|
936 | 940 | return False |
|
937 | 941 | |
|
938 | 942 | def _keep_cursor_in_buffer(self): |
|
939 | 943 | """ Ensures that the cursor is inside the editing region. Returns |
|
940 | 944 | whether the cursor was moved. |
|
941 | 945 | """ |
|
942 | 946 | cursor = self._control.textCursor() |
|
943 | 947 | if self._in_buffer(cursor.position()): |
|
944 | 948 | return False |
|
945 | 949 | else: |
|
946 | 950 | cursor.movePosition(QtGui.QTextCursor.End) |
|
947 | 951 | self._control.setTextCursor(cursor) |
|
948 | 952 | return True |
|
949 | 953 | |
|
950 | 954 | def _page(self, text): |
|
951 | 955 | """ Displays text using the pager. |
|
952 | 956 | """ |
|
953 | 957 | if self._page_style == 'custom': |
|
954 | 958 | self.custom_page_requested.emit(text) |
|
955 | 959 | elif self._page_style == 'none': |
|
956 | 960 | self._append_plain_text(text) |
|
957 | 961 | else: |
|
958 | 962 | self._page_control.clear() |
|
959 | 963 | cursor = self._page_control.textCursor() |
|
960 | 964 | self._insert_plain_text(cursor, text) |
|
961 | 965 | self._page_control.moveCursor(QtGui.QTextCursor.Start) |
|
962 | 966 | |
|
963 | 967 | self._page_control.viewport().resize(self._control.size()) |
|
964 | 968 | if self._splitter: |
|
965 | 969 | self._page_control.show() |
|
966 | 970 | self._page_control.setFocus() |
|
967 | 971 | else: |
|
968 | 972 | self.layout().setCurrentWidget(self._page_control) |
|
969 | 973 | |
|
970 | 974 | def _prompt_started(self): |
|
971 | 975 | """ Called immediately after a new prompt is displayed. |
|
972 | 976 | """ |
|
973 | 977 | # Temporarily disable the maximum block count to permit undo/redo and |
|
974 | 978 | # to ensure that the prompt position does not change due to truncation. |
|
975 | 979 | self._control.document().setMaximumBlockCount(0) |
|
976 | 980 | self._control.setUndoRedoEnabled(True) |
|
977 | 981 | |
|
978 | 982 | self._control.setReadOnly(False) |
|
979 | 983 | self._control.moveCursor(QtGui.QTextCursor.End) |
|
980 | 984 | |
|
981 | 985 | self._executing = False |
|
982 | 986 | self._prompt_started_hook() |
|
983 | 987 | |
|
984 | 988 | def _prompt_finished(self): |
|
985 | 989 | """ Called immediately after a prompt is finished, i.e. when some input |
|
986 | 990 | will be processed and a new prompt displayed. |
|
987 | 991 | """ |
|
988 | 992 | self._control.setUndoRedoEnabled(False) |
|
989 | 993 | self._control.setReadOnly(True) |
|
990 | 994 | self._prompt_finished_hook() |
|
991 | 995 | |
|
992 | 996 | def _readline(self, prompt='', callback=None): |
|
993 | 997 | """ Reads one line of input from the user. |
|
994 | 998 | |
|
995 | 999 | Parameters |
|
996 | 1000 | ---------- |
|
997 | 1001 | prompt : str, optional |
|
998 | 1002 | The prompt to print before reading the line. |
|
999 | 1003 | |
|
1000 | 1004 | callback : callable, optional |
|
1001 | 1005 | A callback to execute with the read line. If not specified, input is |
|
1002 | 1006 | read *synchronously* and this method does not return until it has |
|
1003 | 1007 | been read. |
|
1004 | 1008 | |
|
1005 | 1009 | Returns |
|
1006 | 1010 | ------- |
|
1007 | 1011 | If a callback is specified, returns nothing. Otherwise, returns the |
|
1008 | 1012 | input string with the trailing newline stripped. |
|
1009 | 1013 | """ |
|
1010 | 1014 | if self._reading: |
|
1011 | 1015 | raise RuntimeError('Cannot read a line. Widget is already reading.') |
|
1012 | 1016 | |
|
1013 | 1017 | if not callback and not self.isVisible(): |
|
1014 | 1018 | # If the user cannot see the widget, this function cannot return. |
|
1015 | 1019 | raise RuntimeError('Cannot synchronously read a line if the widget' |
|
1016 | 1020 | 'is not visible!') |
|
1017 | 1021 | |
|
1018 | 1022 | self._reading = True |
|
1019 | 1023 | self._show_prompt(prompt, newline=False) |
|
1020 | 1024 | |
|
1021 | 1025 | if callback is None: |
|
1022 | 1026 | self._reading_callback = None |
|
1023 | 1027 | while self._reading: |
|
1024 | 1028 | QtCore.QCoreApplication.processEvents() |
|
1025 | 1029 | return self.input_buffer.rstrip('\n') |
|
1026 | 1030 | |
|
1027 | 1031 | else: |
|
1028 | 1032 | self._reading_callback = lambda: \ |
|
1029 | 1033 | callback(self.input_buffer.rstrip('\n')) |
|
1030 | 1034 | |
|
1031 | 1035 | def _reset(self): |
|
1032 | 1036 | """ Clears the console and resets internal state variables. |
|
1033 | 1037 | """ |
|
1034 | 1038 | self._control.clear() |
|
1035 | 1039 | self._executing = self._reading = False |
|
1036 | 1040 | |
|
1037 | 1041 | def _set_continuation_prompt(self, prompt, html=False): |
|
1038 | 1042 | """ Sets the continuation prompt. |
|
1039 | 1043 | |
|
1040 | 1044 | Parameters |
|
1041 | 1045 | ---------- |
|
1042 | 1046 | prompt : str |
|
1043 | 1047 | The prompt to show when more input is needed. |
|
1044 | 1048 | |
|
1045 | 1049 | html : bool, optional (default False) |
|
1046 | 1050 | If set, the prompt will be inserted as formatted HTML. Otherwise, |
|
1047 | 1051 | the prompt will be treated as plain text, though ANSI color codes |
|
1048 | 1052 | will be handled. |
|
1049 | 1053 | """ |
|
1050 | 1054 | if html: |
|
1051 | 1055 | self._continuation_prompt_html = prompt |
|
1052 | 1056 | else: |
|
1053 | 1057 | self._continuation_prompt = prompt |
|
1054 | 1058 | self._continuation_prompt_html = None |
|
1055 | 1059 | |
|
1056 | 1060 | def _set_cursor(self, cursor): |
|
1057 | 1061 | """ Convenience method to set the current cursor. |
|
1058 | 1062 | """ |
|
1059 | 1063 | self._control.setTextCursor(cursor) |
|
1060 | 1064 | |
|
1061 | 1065 | def _set_position(self, position): |
|
1062 | 1066 | """ Convenience method to set the position of the cursor. |
|
1063 | 1067 | """ |
|
1064 | 1068 | cursor = self._control.textCursor() |
|
1065 | 1069 | cursor.setPosition(position) |
|
1066 | 1070 | self._control.setTextCursor(cursor) |
|
1067 | 1071 | |
|
1068 | 1072 | def _set_selection(self, start, end): |
|
1069 | 1073 | """ Convenience method to set the current selected text. |
|
1070 | 1074 | """ |
|
1071 | 1075 | self._control.setTextCursor(self._get_selection_cursor(start, end)) |
|
1072 | 1076 | |
|
1073 | 1077 | def _show_context_menu(self, pos): |
|
1074 | 1078 | """ Shows a context menu at the given QPoint (in widget coordinates). |
|
1075 | 1079 | """ |
|
1076 | 1080 | menu = QtGui.QMenu() |
|
1077 | 1081 | |
|
1078 | 1082 | copy_action = menu.addAction('Copy', self.copy) |
|
1079 | 1083 | copy_action.setEnabled(self._get_cursor().hasSelection()) |
|
1080 | 1084 | copy_action.setShortcut(QtGui.QKeySequence.Copy) |
|
1081 | 1085 | |
|
1082 | 1086 | paste_action = menu.addAction('Paste', self.paste) |
|
1083 | 1087 | paste_action.setEnabled(self.can_paste()) |
|
1084 | 1088 | paste_action.setShortcut(QtGui.QKeySequence.Paste) |
|
1085 | 1089 | |
|
1086 | 1090 | menu.addSeparator() |
|
1087 | 1091 | menu.addAction('Select All', self.select_all) |
|
1088 | 1092 | |
|
1089 | 1093 | menu.exec_(self._control.mapToGlobal(pos)) |
|
1090 | 1094 | |
|
1091 | 1095 | def _show_prompt(self, prompt=None, html=False, newline=True): |
|
1092 | 1096 | """ Writes a new prompt at the end of the buffer. |
|
1093 | 1097 | |
|
1094 | 1098 | Parameters |
|
1095 | 1099 | ---------- |
|
1096 | 1100 | prompt : str, optional |
|
1097 | 1101 | The prompt to show. If not specified, the previous prompt is used. |
|
1098 | 1102 | |
|
1099 | 1103 | html : bool, optional (default False) |
|
1100 | 1104 | Only relevant when a prompt is specified. If set, the prompt will |
|
1101 | 1105 | be inserted as formatted HTML. Otherwise, the prompt will be treated |
|
1102 | 1106 | as plain text, though ANSI color codes will be handled. |
|
1103 | 1107 | |
|
1104 | 1108 | newline : bool, optional (default True) |
|
1105 | 1109 | If set, a new line will be written before showing the prompt if |
|
1106 | 1110 | there is not already a newline at the end of the buffer. |
|
1107 | 1111 | """ |
|
1108 | 1112 | # Insert a preliminary newline, if necessary. |
|
1109 | 1113 | if newline: |
|
1110 | 1114 | cursor = self._get_end_cursor() |
|
1111 | 1115 | if cursor.position() > 0: |
|
1112 | 1116 | cursor.movePosition(QtGui.QTextCursor.Left, |
|
1113 | 1117 | QtGui.QTextCursor.KeepAnchor) |
|
1114 | 1118 | if str(cursor.selection().toPlainText()) != '\n': |
|
1115 | 1119 | self._append_plain_text('\n') |
|
1116 | 1120 | |
|
1117 | 1121 | # Write the prompt. |
|
1118 | 1122 | if prompt is None: |
|
1119 | 1123 | if self._prompt_html is None: |
|
1120 | 1124 | self._append_plain_text(self._prompt) |
|
1121 | 1125 | else: |
|
1122 | 1126 | self._append_html(self._prompt_html) |
|
1123 | 1127 | else: |
|
1124 | 1128 | if html: |
|
1125 | 1129 | self._prompt = self._append_html_fetching_plain_text(prompt) |
|
1126 | 1130 | self._prompt_html = prompt |
|
1127 | 1131 | else: |
|
1128 | 1132 | self._append_plain_text(prompt) |
|
1129 | 1133 | self._prompt = prompt |
|
1130 | 1134 | self._prompt_html = None |
|
1131 | 1135 | |
|
1132 | 1136 | self._prompt_pos = self._get_end_cursor().position() |
|
1133 | 1137 | self._prompt_started() |
|
1134 | 1138 | |
|
1135 | 1139 | def _show_continuation_prompt(self): |
|
1136 | 1140 | """ Writes a new continuation prompt at the end of the buffer. |
|
1137 | 1141 | """ |
|
1138 | 1142 | if self._continuation_prompt_html is None: |
|
1139 | 1143 | self._append_plain_text(self._continuation_prompt) |
|
1140 | 1144 | else: |
|
1141 | 1145 | self._continuation_prompt = self._append_html_fetching_plain_text( |
|
1142 | 1146 | self._continuation_prompt_html) |
|
1143 | 1147 | |
|
1144 | 1148 | self._prompt_started() |
|
1145 | 1149 | |
|
1146 | 1150 | |
|
1147 | 1151 | class HistoryConsoleWidget(ConsoleWidget): |
|
1148 | 1152 | """ A ConsoleWidget that keeps a history of the commands that have been |
|
1149 | 1153 | executed. |
|
1150 | 1154 | """ |
|
1151 | 1155 | |
|
1152 | 1156 | #--------------------------------------------------------------------------- |
|
1153 | 1157 | # 'object' interface |
|
1154 | 1158 | #--------------------------------------------------------------------------- |
|
1155 | 1159 | |
|
1156 | 1160 | def __init__(self, *args, **kw): |
|
1157 | 1161 | super(HistoryConsoleWidget, self).__init__(*args, **kw) |
|
1158 | 1162 | self._history = [] |
|
1159 | 1163 | self._history_index = 0 |
|
1160 | 1164 | |
|
1161 | 1165 | #--------------------------------------------------------------------------- |
|
1162 | 1166 | # 'ConsoleWidget' public interface |
|
1163 | 1167 | #--------------------------------------------------------------------------- |
|
1164 | 1168 | |
|
1165 | 1169 | def execute(self, source=None, hidden=False, interactive=False): |
|
1166 | 1170 | """ Reimplemented to the store history. |
|
1167 | 1171 | """ |
|
1168 | 1172 | if not hidden: |
|
1169 | 1173 | history = self.input_buffer if source is None else source |
|
1170 | 1174 | |
|
1171 | 1175 | executed = super(HistoryConsoleWidget, self).execute( |
|
1172 | 1176 | source, hidden, interactive) |
|
1173 | 1177 | |
|
1174 | 1178 | if executed and not hidden: |
|
1175 | 1179 | self._history.append(history.rstrip()) |
|
1176 | 1180 | self._history_index = len(self._history) |
|
1177 | 1181 | |
|
1178 | 1182 | return executed |
|
1179 | 1183 | |
|
1180 | 1184 | #--------------------------------------------------------------------------- |
|
1181 | 1185 | # 'ConsoleWidget' abstract interface |
|
1182 | 1186 | #--------------------------------------------------------------------------- |
|
1183 | 1187 | |
|
1184 | 1188 | def _up_pressed(self): |
|
1185 | 1189 | """ Called when the up key is pressed. Returns whether to continue |
|
1186 | 1190 | processing the event. |
|
1187 | 1191 | """ |
|
1188 | 1192 | prompt_cursor = self._get_prompt_cursor() |
|
1189 | 1193 | if self._get_cursor().blockNumber() == prompt_cursor.blockNumber(): |
|
1190 | 1194 | self.history_previous() |
|
1191 | 1195 | |
|
1192 | 1196 | # Go to the first line of prompt for seemless history scrolling. |
|
1193 | 1197 | cursor = self._get_prompt_cursor() |
|
1194 | 1198 | cursor.movePosition(QtGui.QTextCursor.EndOfLine) |
|
1195 | 1199 | self._set_cursor(cursor) |
|
1196 | 1200 | |
|
1197 | 1201 | return False |
|
1198 | 1202 | return True |
|
1199 | 1203 | |
|
1200 | 1204 | def _down_pressed(self): |
|
1201 | 1205 | """ Called when the down key is pressed. Returns whether to continue |
|
1202 | 1206 | processing the event. |
|
1203 | 1207 | """ |
|
1204 | 1208 | end_cursor = self._get_end_cursor() |
|
1205 | 1209 | if self._get_cursor().blockNumber() == end_cursor.blockNumber(): |
|
1206 | 1210 | self.history_next() |
|
1207 | 1211 | return False |
|
1208 | 1212 | return True |
|
1209 | 1213 | |
|
1210 | 1214 | #--------------------------------------------------------------------------- |
|
1211 | 1215 | # 'HistoryConsoleWidget' interface |
|
1212 | 1216 | #--------------------------------------------------------------------------- |
|
1213 | 1217 | |
|
1214 | 1218 | def history_previous(self): |
|
1215 | 1219 | """ If possible, set the input buffer to the previous item in the |
|
1216 | 1220 | history. |
|
1217 | 1221 | """ |
|
1218 | 1222 | if self._history_index > 0: |
|
1219 | 1223 | self._history_index -= 1 |
|
1220 | 1224 | self.input_buffer = self._history[self._history_index] |
|
1221 | 1225 | |
|
1222 | 1226 | def history_next(self): |
|
1223 | 1227 | """ Set the input buffer to the next item in the history, or a blank |
|
1224 | 1228 | line if there is no subsequent item. |
|
1225 | 1229 | """ |
|
1226 | 1230 | if self._history_index < len(self._history): |
|
1227 | 1231 | self._history_index += 1 |
|
1228 | 1232 | if self._history_index < len(self._history): |
|
1229 | 1233 | self.input_buffer = self._history[self._history_index] |
|
1230 | 1234 | else: |
|
1231 | 1235 | self.input_buffer = '' |
@@ -1,63 +1,63 b'' | |||
|
1 | 1 | """ A demo of the Qt console-style IPython frontend. |
|
2 | 2 | """ |
|
3 | 3 | |
|
4 | 4 | # Systemm library imports |
|
5 | 5 | from PyQt4 import QtCore, QtGui |
|
6 | 6 | |
|
7 | 7 | # Local imports |
|
8 | 8 | from IPython.external.argparse import ArgumentParser |
|
9 | 9 | from IPython.frontend.qt.kernelmanager import QtKernelManager |
|
10 | 10 | |
|
11 | 11 | |
|
12 | 12 | def main(): |
|
13 | 13 | """ Entry point for demo. |
|
14 | 14 | """ |
|
15 | 15 | # Parse command line arguments. |
|
16 | 16 | parser = ArgumentParser() |
|
17 | 17 | group = parser.add_mutually_exclusive_group() |
|
18 | 18 | group.add_argument('--pure', action='store_true', help = \ |
|
19 | 19 | 'use a pure Python kernel instead of an IPython kernel') |
|
20 | 20 | group.add_argument('--pylab', action='store_true', |
|
21 | 21 | help='use a kernel with PyLab enabled') |
|
22 | 22 | parser.add_argument('--rich', action='store_true', |
|
23 | 23 | help='use a rich text frontend') |
|
24 | 24 | namespace = parser.parse_args() |
|
25 | 25 | |
|
26 | 26 | # Don't let Qt or ZMQ swallow KeyboardInterupts. |
|
27 | 27 | import signal |
|
28 | 28 | signal.signal(signal.SIGINT, signal.SIG_DFL) |
|
29 | 29 | |
|
30 | 30 | # Create a KernelManager and start a kernel. |
|
31 | 31 | kernel_manager = QtKernelManager() |
|
32 | 32 | if namespace.pure: |
|
33 | 33 | kernel_manager.start_kernel(ipython=False) |
|
34 | 34 | elif namespace.pylab: |
|
35 | 35 | if namespace.rich: |
|
36 | 36 | kernel_manager.start_kernel(pylab='payload-svg') |
|
37 | 37 | else: |
|
38 | 38 | kernel_manager.start_kernel(pylab='qt4') |
|
39 | 39 | else: |
|
40 | 40 | kernel_manager.start_kernel() |
|
41 | 41 | kernel_manager.start_channels() |
|
42 | 42 | |
|
43 | 43 | # Launch the application. |
|
44 | 44 | app = QtGui.QApplication([]) |
|
45 | 45 | if namespace.pure: |
|
46 | 46 | from frontend_widget import FrontendWidget |
|
47 | 47 | kind = 'rich' if namespace.rich else 'plain' |
|
48 | 48 | widget = FrontendWidget(kind=kind) |
|
49 | 49 | else: |
|
50 | 50 | if namespace.rich: |
|
51 | 51 | from rich_ipython_widget import RichIPythonWidget |
|
52 | 52 | widget = RichIPythonWidget() |
|
53 | 53 | else: |
|
54 | 54 | from ipython_widget import IPythonWidget |
|
55 | 55 | widget = IPythonWidget() |
|
56 | 56 | widget.kernel_manager = kernel_manager |
|
57 | widget.setWindowTitle('Python') | |
|
57 | widget.setWindowTitle('Python' if namespace.pure else 'IPython') | |
|
58 | 58 | widget.show() |
|
59 | 59 | app.exec_() |
|
60 | 60 | |
|
61 | 61 | |
|
62 | 62 | if __name__ == '__main__': |
|
63 | 63 | main() |
@@ -1,32 +1,52 b'' | |||
|
1 | 1 | # Standard library imports |
|
2 | 2 | import unittest |
|
3 | 3 | |
|
4 | 4 | # Local imports |
|
5 | 5 | from IPython.frontend.qt.console.ansi_code_processor import AnsiCodeProcessor |
|
6 | 6 | |
|
7 | 7 | |
|
8 | 8 | class TestAnsiCodeProcessor(unittest.TestCase): |
|
9 | 9 | |
|
10 | 10 | def setUp(self): |
|
11 | 11 | self.processor = AnsiCodeProcessor() |
|
12 | 12 | |
|
13 | def testClear(self): | |
|
14 | string = '\x1b[2J\x1b[K' | |
|
15 | i = -1 | |
|
16 | for i, substring in enumerate(self.processor.split_string(string)): | |
|
17 | if i == 0: | |
|
18 | self.assertEquals(len(self.processor.actions), 1) | |
|
19 | action = self.processor.actions[0] | |
|
20 | self.assertEquals(action.kind, 'erase') | |
|
21 | self.assertEquals(action.area, 'screen') | |
|
22 | self.assertEquals(action.erase_to, 'all') | |
|
23 | elif i == 1: | |
|
24 | self.assertEquals(len(self.processor.actions), 1) | |
|
25 | action = self.processor.actions[0] | |
|
26 | self.assertEquals(action.kind, 'erase') | |
|
27 | self.assertEquals(action.area, 'line') | |
|
28 | self.assertEquals(action.erase_to, 'end') | |
|
29 | else: | |
|
30 | self.fail('Too many substrings.') | |
|
31 | self.assertEquals(i, 1, 'Too few substrings.') | |
|
32 | ||
|
13 | 33 | def testColors(self): |
|
14 | 34 | string = "first\x1b[34mblue\x1b[0mlast" |
|
15 | 35 | i = -1 |
|
16 | 36 | for i, substring in enumerate(self.processor.split_string(string)): |
|
17 | 37 | if i == 0: |
|
18 | 38 | self.assertEquals(substring, 'first') |
|
19 | 39 | self.assertEquals(self.processor.foreground_color, None) |
|
20 | 40 | elif i == 1: |
|
21 | 41 | self.assertEquals(substring, 'blue') |
|
22 | 42 | self.assertEquals(self.processor.foreground_color, 4) |
|
23 | 43 | elif i == 2: |
|
24 | 44 | self.assertEquals(substring, 'last') |
|
25 | 45 | self.assertEquals(self.processor.foreground_color, None) |
|
26 | 46 | else: |
|
27 |
self.fail( |
|
|
28 |
self.assertEquals(i, 2, |
|
|
47 | self.fail('Too many substrings.') | |
|
48 | self.assertEquals(i, 2, 'Too few substrings.') | |
|
29 | 49 | |
|
30 | 50 | |
|
31 | 51 | if __name__ == '__main__': |
|
32 | 52 | unittest.main() |
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