Module: Opal::IRB

40
41
42

# File 'opal/opal/corelib/irb.rb', line 40
def output
 @output
end

78
79
80

# File 'opal/opal/corelib/irb.rb', line 78
def self.browser?
 `typeof(document) !== 'undefined' && typeof(prompt) !== 'undefined'`
end

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

# File 'opal/opal/corelib/irb.rb', line 8
def self.ensure_loaded(library)
 return if `Opal.loaded_features`.include? library
 version = if RUBY_ENGINE_VERSION.include? 'dev'
 'master'
 else
 RUBY_ENGINE_VERSION
 end
 url = "https://cdn.opalrb.com/opal/#{version}/#{library}.js"
 %x{
 var libcode;
 if (typeof XMLHttpRequest !== 'undefined') { // Browser
 var r = new XMLHttpRequest();
 r.open("GET", url, false);
 r.send('');
 libcode = r.responseText;
 }
 else {
 #{::Kernel .raise  "You need to provision #{library} yourself in this environment"}
 }
 (new Function('Opal', libcode))(Opal);
 Opal.require(library);
 }
 ::Kernel .raise  "Could not load #{library} for some reason" unless `Opal.loaded_features`.include? library
end

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

# File 'opal/opal/corelib/irb.rb', line 42
def self.prepare_console(&block)
 self.output = ''
 original = {
 $stdout => ->(i) { $stdout = i },
 $stderr => ->(i) { $stderr = i },
 }
 # Prepare a better prompt experience for a browser
 if browser?
 original.each do |pipe, pipe_setter|
 new_pipe = pipe.dup
 new_pipe.write_proc = proc do |str|
 self.output += str
 self.output = output.split("\n").last(30).join("\n")
 self.output += "\n" if str.end_with? "\n"
 pipe.write_proc.call(str)
 end
 new_pipe.tty = false
 pipe_setter.call(new_pipe)
 end
 original_read_proc = $stdin.read_proc
 $stdin.read_proc = `function(s) { var p = prompt(#{output}); if (p !== null) return p + "\n"; return nil; }`
 end
 yield
ensure
 original.each do |pipe, pipe_setter|
 pipe_setter.call(pipe)
 end
 $stdin.read_proc = original_read_proc
 self.output = ''
end