1 | #
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2 | # notifier.rb - optput methods used by irb
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3 | # $Release Version: 0.9.5$
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4 | # $Revision: 11708 $
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5 | # $Date: 2007-02-13 08:01:19 +0900 (Tue, 13 Feb 2007) $
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6 | # by Keiju ISHITSUKA([email protected])
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7 | #
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8 | # --
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9 | #
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10 | #
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11 | #
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12 |
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13 | require "e2mmap"
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14 | require "irb/output-method"
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15 |
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16 | module IRB
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17 | module Notifier
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18 | extend Exception2MessageMapper
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19 | def_exception :ErrUndefinedNotifier,
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20 | "undefined notifier level: %d is specified"
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21 | def_exception :ErrUnrecognizedLevel,
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22 | "unrecognized notifier level: %s is specified"
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23 |
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24 | def def_notifier(prefix = "", output_method = StdioOutputMethod.new)
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25 | CompositeNotifier.new(prefix, output_method)
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26 | end
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27 | module_function :def_notifier
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28 |
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29 | class AbstructNotifier
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30 | def initialize(prefix, base_notifier)
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31 | @prefix = prefix
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32 | @base_notifier = base_notifier
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33 | end
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34 |
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35 | attr_reader :prefix
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36 |
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37 | def notify?
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38 | true
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39 | end
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40 |
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41 | def print(*opts)
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42 | @base_notifier.print prefix, *opts if notify?
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43 | end
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44 |
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45 | def printn(*opts)
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46 | @base_notifier.printn prefix, *opts if notify?
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47 | end
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48 |
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49 | def printf(format, *opts)
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50 | @base_notifier.printf(prefix + format, *opts) if notify?
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51 | end
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52 |
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53 | def puts(*objs)
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54 | if notify?
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55 | @base_notifier.puts(*objs.collect{|obj| prefix + obj.to_s})
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56 | end
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57 | end
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58 |
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59 | def pp(*objs)
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60 | if notify?
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61 | @base_notifier.ppx @prefix, *objs
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62 | end
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63 | end
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64 |
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65 | def ppx(prefix, *objs)
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66 | if notify?
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67 | @base_notifier.ppx @prefix+prefix, *objs
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68 | end
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69 | end
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70 |
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71 | def exec_if
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72 | yield(@base_notifier) if notify?
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73 | end
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74 | end
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75 |
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76 | class CompositeNotifier<AbstructNotifier
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77 | def initialize(prefix, base_notifier)
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78 | super
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79 |
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80 | @notifiers = [D_NOMSG]
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81 | @level_notifier = D_NOMSG
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82 | end
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83 |
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84 | attr_reader :notifiers
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85 |
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86 | def def_notifier(level, prefix = "")
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87 | notifier = LeveledNotifier.new(self, level, prefix)
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88 | @notifiers[level] = notifier
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89 | notifier
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90 | end
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91 |
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92 | attr_reader :level_notifier
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93 | alias level level_notifier
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94 |
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95 | def level_notifier=(value)
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96 | case value
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97 | when AbstructNotifier
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98 | @level_notifier = value
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99 | when Integer
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100 | l = @notifiers[value]
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101 | Notifier.Raise ErrUndefinedNotifer, value unless l
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102 | @level_notifier = l
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103 | else
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104 | Notifier.Raise ErrUnrecognizedLevel, value unless l
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105 | end
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106 | end
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107 |
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108 | alias level= level_notifier=
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109 | end
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110 |
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111 | class LeveledNotifier<AbstructNotifier
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112 | include Comparable
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113 |
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114 | def initialize(base, level, prefix)
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115 | super(prefix, base)
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116 |
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117 | @level = level
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118 | end
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119 |
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120 | attr_reader :level
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121 |
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122 | def <=>(other)
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123 | @level <=> other.level
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124 | end
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125 |
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126 | def notify?
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127 | @base_notifier.level >= self
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128 | end
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129 | end
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130 |
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131 | class NoMsgNotifier<LeveledNotifier
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132 | def initialize
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133 | @base_notifier = nil
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134 | @level = 0
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135 | @prefix = ""
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136 | end
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137 |
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138 | def notify?
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139 | false
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140 | end
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141 | end
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142 |
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143 | D_NOMSG = NoMsgNotifier.new
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144 | end
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145 | end
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