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1 | #
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2 | # irb/input-method.rb - input methods used 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 | module IRB
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13 | #
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14 | # InputMethod
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15 | # StdioInputMethod
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16 | # FileInputMethod
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17 | # (ReadlineInputMethod)
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18 | #
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19 | STDIN_FILE_NAME = "(line)"
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20 | class InputMethod
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21 | @RCS_ID='-$Id: input-method.rb 11708 2007-02-12 23:01:19Z shyouhei $-'
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22 |
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23 | def initialize(file = STDIN_FILE_NAME)
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24 | @file_name = file
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25 | end
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26 | attr_reader :file_name
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27 |
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28 | attr_accessor :prompt
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29 |
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30 | def gets
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31 | IRB.fail NotImplementedError, "gets"
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32 | end
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33 | public :gets
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34 |
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35 | def readable_atfer_eof?
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36 | false
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37 | end
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38 | end
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39 |
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40 | class StdioInputMethod < InputMethod
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41 | def initialize
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42 | super
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43 | @line_no = 0
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44 | @line = []
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45 | end
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46 |
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47 | def gets
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48 | print @prompt
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49 | @line[@line_no += 1] = $stdin.gets
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50 | end
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51 |
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52 | def eof?
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53 | $stdin.eof?
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54 | end
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55 |
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56 | def readable_atfer_eof?
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57 | true
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58 | end
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59 |
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60 | def line(line_no)
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61 | @line[line_no]
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62 | end
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63 | end
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64 |
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65 | class FileInputMethod < InputMethod
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66 | def initialize(file)
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67 | super
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68 | @io = open(file)
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69 | end
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70 | attr_reader :file_name
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71 |
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72 | def eof?
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73 | @io.eof?
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74 | end
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75 |
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76 | def gets
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77 | print @prompt
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78 | l = @io.gets
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79 | # print @prompt, l
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80 | l
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81 | end
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82 | end
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83 |
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84 | begin
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85 | require "readline"
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86 | class ReadlineInputMethod < InputMethod
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87 | include Readline
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88 | def initialize
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89 | super
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90 |
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91 | @line_no = 0
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92 | @line = []
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93 | @eof = false
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94 | end
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95 |
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96 | def gets
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97 | if l = readline(@prompt, false)
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98 | HISTORY.push(l) if !l.empty?
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99 | @line[@line_no += 1] = l + "\n"
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100 | else
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101 | @eof = true
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102 | l
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103 | end
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104 | end
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105 |
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106 | def eof?
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107 | @eof
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108 | end
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109 |
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110 | def readable_atfer_eof?
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111 | true
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112 | end
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113 |
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114 | def line(line_no)
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115 | @line[line_no]
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116 | end
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117 | end
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118 | rescue LoadError
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119 | end
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120 | end
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