Class: Opal::SourceMap

Inherits:
Object
  • Object
show all
Defined in:
opal/lib/opal/source_map.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(fragments, file) ⇒ SourceMap

Returns a new instance of SourceMap


9
10
11
12
# File 'opal/lib/opal/source_map.rb', line 9

def initialize(fragments, file)
  @fragments = fragments
  @file = file
end

Instance Attribute Details

#fileObject (readonly)

Returns the value of attribute file


7
8
9
# File 'opal/lib/opal/source_map.rb', line 7

def file
  @file
end

#fragmentsObject (readonly)

Returns the value of attribute fragments


6
7
8
# File 'opal/lib/opal/source_map.rb', line 6

def fragments
  @fragments
end

Instance Method Details

#as_jsonObject


59
60
61
# File 'opal/lib/opal/source_map.rb', line 59

def as_json
  map.as_json
end

#magic_comment(map_path) ⇒ Object


71
72
73
# File 'opal/lib/opal/source_map.rb', line 71

def magic_comment map_path
  "\n//# sourceMappingURL=file://#{map_path}"
end

#mapObject


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
# File 'opal/lib/opal/source_map.rb', line 14

def map
  @map ||= begin
    source_file = file+'.rb'
    generated_line, generated_column = 1, 0

    mappings = @fragments.map do |fragment|
      mapping = nil
      source_line   = fragment.line
      source_column = fragment.column
      source_code   = fragment.code

      if source_line and source_column
        source_offset    = ::SourceMap::Offset.new(source_line, source_column)
        generated_offset = ::SourceMap::Offset.new(generated_line, generated_column)

        mapping = ::SourceMap::Mapping.new(
          source_file,
          generated_offset,
          source_offset,
          fragment.source_map_name
        )
      end

      new_lines = source_code.count "\n"
      generated_line += new_lines

      if new_lines > 0
        generated_column = source_code.size - (source_code.rindex("\n") + 1)
      else
        generated_column += source_code.size
      end

      mapping
    end

    # Ensure mappings isn't empty: https://github.com/maccman/sourcemap/issues/11
    unless mappings.any?
      zero_offset = ::SourceMap::Offset.new(0,0)
      mappings = [::SourceMap::Mapping.new(source_file,zero_offset,zero_offset)]
    end

    ::SourceMap::Map.new(mappings.compact)
  end
end

#to_jsonObject


63
64
65
# File 'opal/lib/opal/source_map.rb', line 63

def to_json
  map.as_json
end

#to_sObject


67
68
69
# File 'opal/lib/opal/source_map.rb', line 67

def to_s
  map.to_s
end