1 | use strict; |
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2 | use warnings; |
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3 | |
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4 | package BarnOwl; |
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5 | |
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6 | use base qw(Exporter); |
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7 | our @EXPORT_OK = qw(command getcurmsg getnumcols getidletime |
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8 | zephyr_getsender zephyr_getrealm zephyr_zwrite |
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9 | zephyr_stylestrip zephyr_smartstrip_user zephyr_getsubs |
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10 | queue_message admin_message |
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11 | start_question start_password start_edit_win |
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12 | get_data_dir get_config_dir popless_text popless_ztext |
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13 | error debug |
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14 | create_style getnumcolors wordwrap |
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15 | add_dispatch remove_dispatch |
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16 | add_io_dispatch remove_io_dispatch |
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17 | new_command |
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18 | new_variable_int new_variable_bool new_variable_string |
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19 | quote redisplay); |
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20 | our %EXPORT_TAGS = (all => \@EXPORT_OK); |
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21 | |
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22 | BEGIN { |
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23 | # bootstrap in C bindings and glue |
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24 | *owl:: = \*BarnOwl::; |
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25 | bootstrap BarnOwl 1.2; |
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26 | }; |
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27 | |
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28 | use lib(get_data_dir() . "/lib"); |
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29 | use lib(get_config_dir() . "/lib"); |
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30 | |
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31 | use BarnOwl::Hook; |
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32 | use BarnOwl::Hooks; |
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33 | use BarnOwl::Message; |
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34 | use BarnOwl::Style; |
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35 | use BarnOwl::Zephyr; |
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36 | use BarnOwl::Timer; |
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37 | use BarnOwl::Editwin; |
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38 | use BarnOwl::Completion; |
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39 | use BarnOwl::Help; |
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40 | use BarnOwl::AnyEvent; |
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41 | |
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42 | unshift @AnyEvent::REGISTRY, [BarnOwl => BarnOwl::AnyEvent::]; |
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43 | require AnyEvent; |
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44 | |
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45 | use List::Util qw(max); |
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46 | |
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47 | =head1 NAME |
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48 | |
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49 | BarnOwl |
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50 | |
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51 | =head1 DESCRIPTION |
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52 | |
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53 | The BarnOwl module contains the core of BarnOwl's perl |
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54 | bindings. Source in this module is also run at startup to bootstrap |
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55 | barnowl by defining things like the default style. |
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56 | |
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57 | =for NOTE |
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58 | These following functions are defined in perlglue.xs. Keep the |
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59 | documentation here in sync with the user-visible commands defined |
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60 | there! |
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61 | |
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62 | =head2 command STRING |
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63 | |
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64 | Executes a BarnOwl command in the same manner as if the user had |
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65 | executed it at the BarnOwl command prompt. If the command returns a |
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66 | value, return it as a string, otherwise return undef. |
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67 | |
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68 | =head2 getcurmsg |
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69 | |
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70 | Returns the current message as a C<BarnOwl::Message> subclass, or |
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71 | undef if there is no message selected |
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72 | =head2 getnumcols |
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73 | |
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74 | Returns the width of the display window BarnOwl is currently using |
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75 | |
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76 | =head2 getidletime |
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77 | |
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78 | Returns the length of time since the user has pressed a key, in |
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79 | seconds. |
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80 | |
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81 | =head2 zephyr_getrealm |
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82 | |
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83 | Returns the zephyr realm barnowl is running in |
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84 | |
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85 | =head2 zephyr_getsender |
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86 | |
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87 | Returns the fully-qualified name of the zephyr sender barnowl is |
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88 | running as, e.g. C<nelhage@ATHENA.MIT.EDU> |
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89 | |
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90 | =head2 zephyr_zwrite COMMAND MESSAGE |
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91 | |
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92 | Sends a zephyr programmatically. C<COMMAND> should be a C<zwrite> |
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93 | command line, and C<MESSAGE> is the zephyr body to send. |
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94 | |
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95 | =head2 ztext_stylestrip STRING |
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96 | |
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97 | Strips zephyr formatting from a string and returns the result |
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98 | |
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99 | =head2 zephyr_getsubs |
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100 | |
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101 | Returns the list of subscription triples <class,instance,recipient>, |
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102 | separated by newlines. |
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103 | |
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104 | =head2 queue_message MESSAGE |
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105 | |
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106 | Enqueue a message in the BarnOwl message list, logging it and |
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107 | processing it appropriately. C<MESSAGE> should be an instance of |
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108 | BarnOwl::Message or a subclass. |
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109 | |
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110 | =head2 admin_message HEADER BODY |
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111 | |
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112 | Display a BarnOwl B<Admin> message, with the given header and body. |
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113 | |
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114 | =head2 start_question PROMPT CALLBACK |
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115 | |
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116 | Displays C<PROMPT> on the screen and lets the user enter a line of |
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117 | text, and calls C<CALLBACK>, which must be a perl subroutine |
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118 | reference, with the text the user entered |
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119 | |
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120 | =head2 start_password PROMPT CALLBACK |
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121 | |
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122 | Like C<start_question>, but echoes the user's input as C<*>s when they |
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123 | input. |
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124 | |
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125 | =head2 start_edit_win PROMPT CALLBACK |
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126 | |
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127 | Like C<start_question>, but displays C<PROMPT> on a line of its own |
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128 | and opens the editwin. If the user cancels the edit win, C<CALLBACK> |
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129 | is not invoked. |
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130 | |
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131 | =head2 get_data_dir |
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132 | |
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133 | Returns the BarnOwl system data directory, where system libraries and |
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134 | modules are stored |
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135 | |
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136 | =head2 get_config_dir |
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137 | |
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138 | Returns the BarnOwl user configuration directory, where user modules |
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139 | and configuration are stored (by default, C<$HOME/.owl>) |
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140 | |
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141 | =head2 popless_text TEXT |
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142 | |
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143 | Show a popup window containing the given C<TEXT> |
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144 | |
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145 | =head2 popless_ztext TEXT |
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146 | |
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147 | Show a popup window containing the provided zephyr-formatted C<TEXT> |
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148 | |
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149 | =head2 error STRING |
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150 | |
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151 | Reports an error and log it in `show errors'. Note that in any |
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152 | callback or hook called in perl code from BarnOwl, a C<die> will be |
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153 | caught and passed to C<error>. |
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154 | |
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155 | =head2 debug STRING |
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156 | |
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157 | Logs a debugging message to BarnOwl's debug log |
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158 | |
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159 | =head2 getnumcolors |
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160 | |
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161 | Returns the number of colors this BarnOwl is capable of displaying |
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162 | |
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163 | =head2 add_dispatch FD CALLBACK |
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164 | |
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165 | Adds a file descriptor to C<BarnOwl>'s internal C<select()> |
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166 | loop. C<CALLBACK> will be invoked whenever data is available to be |
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167 | read from C<FD>. |
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168 | |
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169 | C<add_dispatch> has been deprecated in favor of C<add_io_dispatch>, |
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170 | and is now a wrapper for it called with C<mode> set to C<'r'>. |
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171 | |
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172 | =cut |
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173 | |
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174 | sub add_dispatch { |
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175 | my $fd = shift; |
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176 | my $cb = shift; |
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177 | add_io_dispatch($fd, 'r', $cb); |
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178 | } |
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179 | |
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180 | =head2 remove_dispatch FD |
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181 | |
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182 | Remove a file descriptor previously registered via C<add_dispatch> |
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183 | |
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184 | C<remove_dispatch> has been deprecated in favor of |
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185 | C<remove_io_dispatch>. |
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186 | |
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187 | =cut |
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188 | |
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189 | *remove_dispatch = \&remove_io_dispatch; |
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190 | |
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191 | =head2 add_io_dispatch FD MODE CB |
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192 | |
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193 | Adds a file descriptor to C<BarnOwl>'s internal C<select()> |
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194 | loop. <MODE> can be 'r', 'w', or 'rw'. C<CALLBACK> will be invoked |
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195 | whenever C<FD> becomes ready, as specified by <MODE>. |
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196 | |
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197 | Only one callback can be registered per FD. If a new callback is |
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198 | registered, the old one is removed. |
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199 | |
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200 | =cut |
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201 | |
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202 | sub add_io_dispatch { |
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203 | my $fd = shift; |
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204 | my $modeStr = shift; |
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205 | my $cb = shift; |
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206 | my $mode = 0; |
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207 | |
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208 | $mode |= 0x1 if ($modeStr =~ /r/i); # Read |
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209 | $mode |= 0x2 if ($modeStr =~ /w/i); # Write |
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210 | if ($mode) { |
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211 | $mode |= 0x4; # Exceptional |
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212 | BarnOwl::Internal::add_io_dispatch($fd, $mode, $cb); |
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213 | } else { |
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214 | die("Invalid I/O Dispatch mode: $modeStr"); |
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215 | } |
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216 | } |
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217 | |
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218 | =head2 remove_io_dispatch FD |
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219 | |
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220 | Remove a file descriptor previously registered via C<add_io_dispatch> |
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221 | |
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222 | =head2 create_style NAME OBJECT |
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223 | |
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224 | Creates a new barnowl style with the given NAME defined by the given |
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225 | object. The object must have a C<description> method which returns a |
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226 | string description of the style, and a and C<format_message> method |
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227 | which accepts a C<BarnOwl::Message> object and returns a string that |
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228 | is the result of formatting the message for display. |
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229 | |
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230 | =head2 redisplay |
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231 | |
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232 | Redraw all of the messages on screen. This is useful if you've just |
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233 | changed how a style renders messages. |
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234 | |
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235 | =cut |
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236 | |
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237 | # perlconfig.c will set this to the value of the -c command-line |
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238 | # switch, if present. |
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239 | our $configfile; |
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240 | |
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241 | our @all_commands; |
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242 | |
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243 | if(!$configfile && -f $ENV{HOME} . "/.barnowlconf") { |
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244 | $configfile = $ENV{HOME} . "/.barnowlconf"; |
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245 | } |
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246 | $configfile ||= $ENV{HOME}."/.owlconf"; |
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247 | |
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248 | # populate global variable space for legacy owlconf files |
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249 | sub _receive_msg_legacy_wrap { |
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250 | my ($m) = @_; |
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251 | $m->legacy_populate_global(); |
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252 | return &BarnOwl::Hooks::_receive_msg($m); |
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253 | } |
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254 | |
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255 | =head2 new_command NAME FUNC [{ARGS}] |
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256 | |
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257 | Add a new owl command. When owl executes the command NAME, FUNC will |
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258 | be called with the arguments passed to the command, with NAME as the |
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259 | first argument. |
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260 | |
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261 | ARGS should be a hashref containing any or all of C<summary>, |
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262 | C<usage>, or C<description> keys: |
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263 | |
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264 | =over 4 |
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265 | |
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266 | =item summary |
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267 | |
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268 | A one-line summary of the purpose of the command |
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269 | |
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270 | =item usage |
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271 | |
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272 | A one-line usage synopsis, showing available options and syntax |
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273 | |
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274 | =item description |
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275 | |
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276 | A longer description of the syntax and semantics of the command, |
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277 | explaining usage and options |
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278 | |
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279 | =back |
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280 | |
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281 | =cut |
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282 | |
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283 | sub new_command { |
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284 | my $name = shift; |
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285 | my $func = shift; |
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286 | my $args = shift || {}; |
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287 | my %args = ( |
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288 | summary => "", |
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289 | usage => "", |
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290 | description => "", |
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291 | %{$args} |
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292 | ); |
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293 | |
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294 | BarnOwl::Internal::new_command($name, $func, $args{summary}, $args{usage}, $args{description}); |
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295 | } |
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296 | |
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297 | =head2 new_variable_int NAME [{ARGS}] |
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298 | |
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299 | =head2 new_variable_bool NAME [{ARGS}] |
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300 | |
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301 | =head2 new_variable_string NAME [{ARGS}] |
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302 | |
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303 | Add a new owl variable, either an int, a bool, or a string, with the |
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304 | specified name. |
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305 | |
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306 | ARGS can optionally contain the following keys: |
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307 | |
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308 | =over 4 |
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309 | |
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310 | =item default |
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311 | |
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312 | The default and initial value for the variable |
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313 | |
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314 | =item summary |
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315 | |
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316 | A one-line summary of the variable's purpose |
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317 | |
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318 | =item description |
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319 | |
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320 | A longer description of the function of the variable |
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321 | |
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322 | =back |
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323 | |
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324 | =cut |
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325 | |
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326 | sub new_variable_int { |
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327 | unshift @_, \&BarnOwl::Internal::new_variable_int, 0; |
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328 | goto \&_new_variable; |
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329 | } |
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330 | |
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331 | sub new_variable_bool { |
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332 | unshift @_, \&BarnOwl::Internal::new_variable_bool, 0; |
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333 | goto \&_new_variable; |
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334 | } |
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335 | |
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336 | sub new_variable_string { |
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337 | unshift @_, \&BarnOwl::Internal::new_variable_string, ""; |
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338 | goto \&_new_variable; |
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339 | } |
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340 | |
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341 | sub _new_variable { |
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342 | my $func = shift; |
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343 | my $default_default = shift; |
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344 | my $name = shift; |
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345 | my $args = shift || {}; |
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346 | my %args = ( |
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347 | summary => "", |
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348 | description => "", |
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349 | default => $default_default, |
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350 | %{$args}); |
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351 | $func->($name, $args{default}, $args{summary}, $args{description}); |
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352 | } |
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353 | |
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354 | =head2 quote LIST |
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355 | |
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356 | Quotes each of the strings in LIST and returns a string that will be |
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357 | correctly decoded to LIST by the BarnOwl command parser. For example: |
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358 | |
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359 | quote('zwrite', 'andersk', '-m', 'Hello, world!') |
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360 | # returns "zwrite andersk -m 'Hello, world!'" |
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361 | |
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362 | =cut |
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363 | |
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364 | sub quote { |
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365 | my @quoted; |
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366 | for my $str (@_) { |
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367 | if ($str eq '') { |
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368 | push @quoted, "''"; |
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369 | } elsif ($str !~ /['" \n\t]/) { |
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370 | push @quoted, "$str"; |
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371 | } elsif ($str !~ /'/) { |
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372 | push @quoted, "'$str'"; |
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373 | } else { |
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374 | (my $qstr = $str) =~ s/"/"'"'"/g; |
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375 | push @quoted, '"' . $qstr . '"'; |
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376 | } |
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377 | } |
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378 | return join(' ', @quoted); |
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379 | } |
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380 | |
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381 | =head2 Modify filters by appending text |
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382 | |
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383 | =cut |
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384 | |
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385 | sub register_builtin_commands { |
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386 | # Filter modification |
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387 | BarnOwl::new_command("filterappend", |
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388 | sub { filter_append_helper('appending', '', @_); }, |
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389 | { |
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390 | summary => "append '<text>' to filter", |
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391 | usage => "filterappend <filter> <text>", |
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392 | }); |
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393 | |
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394 | BarnOwl::new_command("filterand", |
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395 | sub { filter_append_helper('and-ing', 'and', @_); }, |
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396 | { |
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397 | summary => "append 'and <text>' to filter", |
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398 | usage => "filterand <filter> <text>", |
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399 | }); |
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400 | |
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401 | BarnOwl::new_command("filteror", |
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402 | sub { filter_append_helper('or-ing', 'or', @_); }, |
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403 | { |
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404 | summary => "append 'or <text>' to filter", |
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405 | usage => "filteror <filter> <text>", |
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406 | }); |
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407 | |
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408 | # Date formatting |
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409 | BarnOwl::new_command("showdate", |
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410 | sub { BarnOwl::time_format('showdate', '%Y-%m-%d %H:%M'); }, |
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411 | { |
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412 | summary => "Show date in timestamps for supporting styles.", |
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413 | usage => "showdate", |
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414 | }); |
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415 | |
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416 | BarnOwl::new_command("hidedate", |
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417 | sub { BarnOwl::time_format('hidedate', '%H:%M'); }, |
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418 | { |
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419 | summary => "Don't show date in timestamps for supporting styles.", |
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420 | usage => "hidedate", |
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421 | }); |
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422 | |
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423 | BarnOwl::new_command("timeformat", |
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424 | \&BarnOwl::time_format, |
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425 | { |
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426 | summary => "Set the format for timestamps and re-display messages", |
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427 | usage => "timeformat <format>", |
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428 | }); |
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429 | |
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430 | # Receive window scrolling |
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431 | BarnOwl::new_command("recv:shiftleft", |
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432 | \&BarnOwl::recv_shift_left, |
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433 | { |
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434 | summary => "scrolls receive window to the left", |
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435 | usage => "recv:shiftleft [<amount>]", |
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436 | description => <<END_DESCR |
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437 | By default, scroll left by 10 columns. Passing no arguments or 0 activates this default behavior. |
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438 | Otherwise, scroll by the number of columns specified as the argument. |
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439 | END_DESCR |
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440 | }); |
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441 | |
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442 | BarnOwl::new_command("recv:shiftright", |
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443 | \&BarnOwl::recv_shift_right, |
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444 | { |
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445 | summary => "scrolls receive window to the right", |
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446 | usage => "recv:shiftright [<amount>]", |
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447 | description => <<END_DESCR |
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448 | By default, scroll right by 10 columns. Passing no arguments or 0 activates this default behavior. |
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449 | Otherwise, scroll by the number of columns specified as the argument. |
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450 | END_DESCR |
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451 | }); |
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452 | |
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453 | } |
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454 | |
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455 | $BarnOwl::Hooks::startup->add("BarnOwl::register_builtin_commands"); |
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456 | |
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457 | =head3 filter_append_helper ACTION SEP FUNC FILTER APPEND_TEXT |
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458 | |
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459 | Helper to append to filters. |
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460 | |
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461 | =cut |
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462 | |
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463 | sub filter_append_helper |
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464 | { |
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465 | my $action = shift; |
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466 | my $sep = shift; |
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467 | my $func = shift; |
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468 | my $filter = shift; |
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469 | my @append = @_; |
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470 | my $oldfilter = BarnOwl::getfilter($filter); |
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471 | chomp $oldfilter; |
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472 | my $newfilter = "$oldfilter $sep " . quote(@append); |
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473 | my $msgtext = "To filter " . quote($filter) . " $action\n" . quote(@append) . "\nto get\n$newfilter"; |
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474 | if (BarnOwl::getvar('showfilterchange') eq 'on') { |
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475 | BarnOwl::admin_message("Filter", $msgtext); |
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476 | } |
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477 | set_filter($filter, $newfilter); |
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478 | return; |
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479 | } |
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480 | BarnOwl::new_variable_bool("showfilterchange", |
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481 | { default => 1, |
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482 | summary => 'Show modifications to filters by filterappend and friends.'}); |
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483 | |
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484 | sub set_filter |
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485 | { |
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486 | my $filtername = shift; |
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487 | my $filtertext = shift; |
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488 | my $cmd = 'filter ' . BarnOwl::quote($filtername) . ' ' . $filtertext; |
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489 | BarnOwl::command($cmd); |
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490 | } |
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491 | |
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492 | =head3 time_format FORMAT |
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493 | |
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494 | Set the format for displaying times (variable timeformat) and redisplay |
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495 | messages. |
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496 | |
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497 | =cut |
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498 | |
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499 | my $timeformat = '%H:%M'; |
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500 | |
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501 | sub time_format |
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502 | { |
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503 | my $function = shift; |
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504 | my $format = shift; |
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505 | if(!$format) |
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506 | { |
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507 | return $timeformat; |
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508 | } |
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509 | if(shift) |
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510 | { |
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511 | return "Wrong number of arguments for command"; |
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512 | } |
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513 | $timeformat = $format; |
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514 | redisplay(); |
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515 | } |
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516 | |
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517 | =head3 Receive window scrolling |
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518 | |
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519 | Permit scrolling the receive window left or right by arbitrary |
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520 | amounts (with a default of 10 characters). |
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521 | |
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522 | =cut |
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523 | |
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524 | sub recv_shift_left |
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525 | { |
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526 | my $func = shift; |
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527 | my $delta = shift; |
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528 | $delta = 10 unless defined($delta) && int($delta) > 0; |
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529 | my $shift = BarnOwl::recv_getshift(); |
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530 | if($shift > 0) { |
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531 | BarnOwl::recv_setshift(max(0, $shift-$delta)); |
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532 | } else { |
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533 | return "Already full left"; |
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534 | } |
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535 | } |
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536 | |
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537 | sub recv_shift_right |
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538 | { |
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539 | my $func = shift; |
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540 | my $delta = shift; |
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541 | $delta = 10 unless defined($delta) && int($delta) > 0; |
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542 | my $shift = BarnOwl::recv_getshift(); |
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543 | BarnOwl::recv_setshift($shift+$delta); |
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544 | } |
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545 | |
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546 | =head3 default_zephyr_signature |
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547 | |
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548 | Compute the default zephyr signature. |
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549 | |
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550 | =cut |
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551 | |
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552 | sub default_zephyr_signature |
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553 | { |
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554 | my $zsig = getvar('zsig'); |
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555 | if (!$zsig) { |
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556 | if (my $zsigproc = getvar('zsigproc')) { |
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557 | $zsig = `$zsigproc`; |
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558 | } elsif (!defined($zsig = get_zephyr_variable('zwrite-signature'))) { |
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559 | $zsig = ((getpwuid($<))[6]); |
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560 | $zsig =~ s/,.*//; |
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561 | } |
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562 | } |
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563 | chomp($zsig); |
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564 | return $zsig; |
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565 | } |
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566 | |
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567 | =head3 random_zephyr_signature |
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568 | |
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569 | Retrieve a random line from ~/.zsigs (except those beginning with '#') |
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570 | and use it as the zephyr signature. |
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571 | |
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572 | =cut |
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573 | |
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574 | sub random_zephyr_signature |
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575 | { |
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576 | my $zsigfile = "$ENV{'HOME'}/.zsigs"; |
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577 | open my $file, '<', $zsigfile or die "Error opening file $zsigfile: $!"; |
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578 | my @lines = grep !(/^#/ || /^\s*$/), <$file>; |
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579 | close $file; |
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580 | return '' if !@lines; |
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581 | my $zsig = "$lines[int(rand(scalar @lines))]"; |
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582 | chomp $zsig; |
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583 | return $zsig; |
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584 | } |
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585 | |
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586 | # Stub for owl::startup / BarnOwl::startup, so it isn't bound to the |
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587 | # startup command. This may be redefined in a user's configfile. |
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588 | sub startup |
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589 | { |
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590 | } |
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591 | |
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592 | 1; |
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