1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
#
# irb/input-method.rb - input methods used irb
# $Release Version: 0.9.6$
# $Revision: 47266 $
# by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
# --
#
#
#
require 'irb/src_encoding'
require 'irb/magic-file'
module IRB
STDIN_FILE_NAME = "(line)" # :nodoc:
class InputMethod
# Creates a new input method object
def initialize(file = STDIN_FILE_NAME)
@file_name = file
end
# The file name of this input method, usually given during initialization.
attr_reader :file_name
# The irb prompt associated with this input method
attr_accessor :prompt
# Reads the next line from this input method.
#
# See IO#gets for more information.
def gets
IRB.fail NotImplementedError, "gets"
end
public :gets
# Whether this input method is still readable when there is no more data to
# read.
#
# See IO#eof for more information.
def readable_after_eof?
false
end
end
class StdioInputMethod < InputMethod
# Creates a new input method object
def initialize
super
@line_no = 0
@line = []
@stdin = IO.open(STDIN.to_i, :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
@stdout = IO.open(STDOUT.to_i, 'w', :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
end
# Reads the next line from this input method.
#
# See IO#gets for more information.
def gets
print @prompt
line = @stdin.gets
@line[@line_no += 1] = line
end
# Whether the end of this input method has been reached, returns +true+ if
# there is no more data to read.
#
# See IO#eof? for more information.
def eof?
@stdin.eof?
end
# Whether this input method is still readable when there is no more data to
# read.
#
# See IO#eof for more information.
def readable_after_eof?
true
end
# Returns the current line number for #io.
#
# #line counts the number of times #gets is called.
#
# See IO#lineno for more information.
def line(line_no)
@line[line_no]
end
# The external encoding for standard input.
def encoding
@stdin.external_encoding
end
end
# Use a File for IO with irb, see InputMethod
class FileInputMethod < InputMethod
# Creates a new input method object
def initialize(file)
super
@io = IRB::MagicFile.open(file)
end
# The file name of this input method, usually given during initialization.
attr_reader :file_name
# Whether the end of this input method has been reached, returns +true+ if
# there is no more data to read.
#
# See IO#eof? for more information.
def eof?
@io.eof?
end
# Reads the next line from this input method.
#
# See IO#gets for more information.
def gets
print @prompt
l = @io.gets
l
end
# The external encoding for standard input.
def encoding
@io.external_encoding
end
end
begin
require "readline"
class ReadlineInputMethod < InputMethod
include Readline
# Creates a new input method object using Readline
def initialize
super
@line_no = 0
@line = []
@eof = false
@stdin = IO.open(STDIN.to_i, :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
@stdout = IO.open(STDOUT.to_i, 'w', :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
end
# Reads the next line from this input method.
#
# See IO#gets for more information.
def gets
Readline.input = @stdin
Readline.output = @stdout
if l = readline(@prompt, false)
HISTORY.push(l) if !l.empty?
@line[@line_no += 1] = l + "\n"
else
@eof = true
l
end
end
# Whether the end of this input method has been reached, returns +true+
# if there is no more data to read.
#
# See IO#eof? for more information.
def eof?
@eof
end
# Whether this input method is still readable when there is no more data to
# read.
#
# See IO#eof for more information.
def readable_after_eof?
true
end
# Returns the current line number for #io.
#
# #line counts the number of times #gets is called.
#
# See IO#lineno for more information.
def line(line_no)
@line[line_no]
end
# The external encoding for standard input.
def encoding
@stdin.external_encoding
end
end
rescue LoadError
end
end
|
