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@@ -1,177 +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 | |
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7 | 7 | |
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8 | 8 | class AnsiAction(object): |
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9 | 9 | """ Represents an action requested by an ANSI escape sequence. |
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10 | 10 | """ |
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11 | 11 | def __init__(self, kind): |
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12 | 12 | self.kind = kind |
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13 | 13 | |
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14 | 14 | class MoveAction(AnsiAction): |
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15 | 15 | """ An AnsiAction for cursor move requests (CUU, CUD, CUF, CUB, CNL, CPL, |
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16 | 16 | CHA, and CUP commands). |
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17 | 17 | """ |
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18 | 18 | def __init__(self): |
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19 | 19 | raise NotImplementedError |
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20 | 20 | |
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21 | 21 | class EraseAction(AnsiAction): |
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22 | 22 | """ An AnsiAction for erase requests (ED and EL commands). |
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23 | 23 | """ |
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24 | 24 | def __init__(self, area, erase_to): |
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25 | 25 | super(EraseAction, self).__init__('erase') |
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26 | 26 | self.area = area |
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27 | 27 | self.erase_to = erase_to |
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28 | 28 | |
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29 | 29 | |
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30 | 30 | class AnsiCodeProcessor(object): |
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31 | 31 | """ Translates ANSI escape codes into readable attributes. |
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32 | 32 | """ |
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33 | 33 | |
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34 | 34 | # Protected class variables. |
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35 | 35 | _ansi_commands = 'ABCDEFGHJKSTfmnsu' |
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36 | 36 | _ansi_pattern = re.compile('\x01?\x1b\[(.*?)([%s])\x02?' % _ansi_commands) |
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37 | 37 | |
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38 | 38 | def __init__(self): |
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39 | 39 | self.actions = [] |
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40 | 40 | self.reset_sgr() |
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41 | 41 | |
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42 | 42 | def reset_sgr(self): |
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43 | 43 | """ Reset graphics attributs to their default values. |
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44 | 44 | """ |
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45 | 45 | self.intensity = 0 |
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46 | 46 | self.italic = False |
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47 | 47 | self.bold = False |
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48 | 48 | self.underline = False |
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49 | 49 | self.foreground_color = None |
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50 | 50 | self.background_color = None |
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51 | 51 | |
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52 | 52 | def split_string(self, string): |
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53 | 53 | """ Yields substrings for which the same escape code applies. |
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54 | 54 | """ |
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55 | 55 | self.actions = [] |
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56 | 56 | start = 0 |
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57 | 57 | |
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58 | 58 | for match in self._ansi_pattern.finditer(string): |
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59 | 59 | substring = string[start:match.start()] |
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60 | 60 | if substring or self.actions: |
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61 | 61 | yield substring |
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62 | 62 | start = match.end() |
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63 | 63 | |
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64 | 64 | self.actions = [] |
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65 | 65 | try: |
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66 | 66 | params = [] |
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67 | 67 | for param in match.group(1).split(';'): |
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68 | 68 | if param: |
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69 | 69 | params.append(int(param)) |
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70 | 70 | except ValueError: |
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71 | 71 | # Silently discard badly formed escape codes. |
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72 | 72 | pass |
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73 | 73 | else: |
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74 | 74 | self.set_csi_code(match.group(2), params) |
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75 | 75 | |
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76 | 76 | substring = string[start:] |
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77 | 77 | if substring or self.actions: |
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78 | 78 | yield substring |
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79 | 79 | |
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80 | 80 | def set_csi_code(self, command, params=[]): |
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81 | 81 | """ Set attributes based on CSI (Control Sequence Introducer) code. |
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82 | 82 | |
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83 | 83 | Parameters |
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84 | 84 | ---------- |
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85 | 85 | command : str |
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86 | 86 | The code identifier, i.e. the final character in the sequence. |
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87 | 87 | |
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88 | 88 | params : sequence of integers, optional |
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89 | 89 | The parameter codes for the command. |
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90 | 90 | """ |
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91 | 91 | if command == 'm': # SGR - Select Graphic Rendition |
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92 | 92 | for code in params: |
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93 | 93 | self.set_sgr_code(code) |
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94 | 94 | |
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95 | 95 | elif (command == 'J' or # ED - Erase Data |
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96 | 96 | command == 'K'): # EL - Erase in Line |
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97 | 97 | code = params[0] if params else 0 |
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98 | 98 | if 0 <= code <= 2: |
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99 | 99 | area = 'screen' if command == 'J' else 'line' |
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100 | 100 | if code == 0: |
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101 | 101 | erase_to = 'end' |
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102 | 102 | elif code == 1: |
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103 | 103 | erase_to = 'start' |
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104 | 104 | elif code == 2: |
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105 | 105 | erase_to = 'all' |
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106 | 106 | self.actions.append(EraseAction(area, erase_to)) |
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107 | 107 | |
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108 | 108 | def set_sgr_code(self, code): |
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109 | 109 | """ Set attributes based on SGR (Select Graphic Rendition) code. |
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110 | 110 | """ |
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111 | 111 | if code == 0: |
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112 | 112 | self.reset_sgr() |
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113 | 113 | elif code == 1: |
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114 | 114 | self.intensity = 1 |
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115 | 115 | self.bold = True |
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116 | 116 | elif code == 2: |
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117 | 117 | self.intensity = 0 |
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118 | 118 | elif code == 3: |
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119 | 119 | self.italic = True |
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120 | 120 | elif code == 4: |
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121 | 121 | self.underline = True |
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122 | 122 | elif code == 22: |
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123 | 123 | self.intensity = 0 |
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124 | 124 | self.bold = False |
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125 | 125 | elif code == 23: |
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126 | 126 | self.italic = False |
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127 | 127 | elif code == 24: |
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128 | 128 | self.underline = False |
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129 | 129 | elif code >= 30 and code <= 37: |
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130 | 130 | self.foreground_color = code - 30 |
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131 | 131 | elif code == 39: |
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132 | 132 | self.foreground_color = None |
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133 | 133 | elif code >= 40 and code <= 47: |
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134 | 134 | self.background_color = code - 40 |
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135 | 135 | elif code == 49: |
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136 | 136 | self.background_color = None |
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137 | 137 | |
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138 | 138 | |
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139 | 139 | class QtAnsiCodeProcessor(AnsiCodeProcessor): |
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140 | 140 | """ Translates ANSI escape codes into QTextCharFormats. |
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141 | 141 | """ |
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142 | 142 | |
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143 | 143 | # A map from color codes to RGB colors. |
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144 |
ansi_colors = ( |
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145 |
(' |
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146 |
(' |
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147 |
(' |
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148 |
(' |
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149 |
(' |
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150 |
(' |
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151 |
(' |
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152 |
(' |
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144 | ansi_colors = (# Normal, Bright/Light ANSI color code | |
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145 | ('black', 'grey'), # 0: black | |
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146 | ('darkred', 'red'), # 1: red | |
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147 | ('darkgreen', 'green'), # 2: green | |
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148 | ('gold', 'yellow'), # 3: yellow | |
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149 | ('darkblue', 'blue'), # 4: blue | |
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150 | ('darkviolet', 'magenta'), # 5: magenta | |
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151 | ('steelblue', 'cyan'), # 6: cyan | |
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152 | ('grey', 'white')) # 7: white | |
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153 | 153 | |
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154 | 154 | def get_format(self): |
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155 | 155 | """ Returns a QTextCharFormat that encodes the current style attributes. |
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156 | 156 | """ |
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157 | 157 | format = QtGui.QTextCharFormat() |
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158 | 158 | |
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159 | 159 | # Set foreground color |
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160 | 160 | if self.foreground_color is not None: |
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161 | 161 | color = self.ansi_colors[self.foreground_color][self.intensity] |
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162 | 162 | format.setForeground(QtGui.QColor(color)) |
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163 | 163 | |
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164 | 164 | # Set background color |
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165 | 165 | if self.background_color is not None: |
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166 | 166 | color = self.ansi_colors[self.background_color][self.intensity] |
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167 | 167 | format.setBackground(QtGui.QColor(color)) |
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168 | 168 | |
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169 | 169 | # Set font weight/style options |
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170 | 170 | if self.bold: |
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171 | 171 | format.setFontWeight(QtGui.QFont.Bold) |
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172 | 172 | else: |
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173 | 173 | format.setFontWeight(QtGui.QFont.Normal) |
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174 | 174 | format.setFontItalic(self.italic) |
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175 | 175 | format.setFontUnderline(self.underline) |
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176 | 176 | |
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177 | 177 | return format |
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