Class: SourceMap::Map

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# File 'opal/stdlib/source_map/map.rb', line 71
def initialize(mappings = [], filename = nil)
 @mappings, @filename = mappings, filename
end

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# File 'opal/stdlib/source_map/map.rb', line 75
def filename
 @filename
end

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# File 'opal/stdlib/source_map/map.rb', line 31
def self.decode_vlq_mappings(str, sources = [], names = [])
 mappings = []
 source_id = 0
 original_line = 1
 original_column = 0
 name_id = 0
 VLQ .decode_mappings (str).each_with_index do |group, index|
 generated_column = 0
 generated_line = index + 1
 group.each do |segment|
 generated_column += segment[0]
 generated = Offset .new (generated_line, generated_column)
 if segment.size >= 4
 source_id += segment[1]
 original_line += segment[2]
 original_column += segment[3]
 source = sources[source_id]
 original = Offset .new (original_line, original_column)
 else
 # TODO: Research this case
 next
 end
 if segment[4]
 name_id += segment[4]
 name = names[name_id]
 end
 mappings << Mapping .new(source, generated, original, name)
 end
 end
 mappings
end

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# File 'opal/stdlib/source_map/map.rb', line 15
def self.from_hash(hash)
 str = hash['mappings']
 sources = hash['sources']
 names = hash['names']
 mappings = decode_vlq_mappings(str, sources, names)
 new(mappings, hash['file'])
end

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# File 'opal/stdlib/source_map/map.rb', line 11
def self.from_json(json)
 from_hash JSON .parse (json)
end

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# File 'opal/stdlib/source_map/map.rb', line 111
def +(other)
 mappings = @mappings.dup
 offset = @mappings.any? ? @mappings.last.generated.line+1 : 0
 other.each do |m|
 mappings << Mapping .new(
 m.source, m.generated + offset,
 m.original, m.name
 )
 end
 self.class.new(mappings, other.filename)
end

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# File 'opal/stdlib/source_map/map.rb', line 101
def ==(other)
 eql?(other)
end

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# File 'opal/stdlib/source_map/map.rb', line 81
def [](i)
 @mappings[i]
end

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# File 'opal/stdlib/source_map/map.rb', line 161
def as_json
 {
 "version" => 3,
 "file" => filename,
 "mappings" => to_s,
 "sources" => sources,
 "names" => names
 }
end

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# File 'opal/stdlib/source_map/map.rb', line 141
def bsearch(offset, from = 0, to = size - 1)
 mid = (from + to) / 2
 # We haven't found a match
 if from > to
 return from < 1 ? nil : self[from-1]
 end
 # We found an exact match
 if offset == self[mid].generated
 self[mid]
 # We need to filter more
 elsif offset < self[mid].generated
 bsearch(offset, from, mid - 1)
 elsif offset > self[mid].generated
 bsearch(offset, mid + 1, to)
 end
end

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# File 'opal/stdlib/source_map/map.rb', line 85
def each(&block)
 @mappings.each(&block)
end

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# File 'opal/stdlib/source_map/map.rb', line 105
def eql?(other)
 other.is_a?(self.class) &&
 self.mappings == other.mappings &&
 self.filename == other.filename
end

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# File 'opal/stdlib/source_map/map.rb', line 174
def inspect
 str = "#<#{self.class}"
 str << " filename=#{filename.inspect}" if filename
 str << " mappings=#{mappings.map(&:to_s).inspect}" if mappings.any?
 str << ">"
 str
end

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# File 'opal/stdlib/source_map/map.rb', line 97
def names
 @names ||= @mappings.map(&:name).uniq.compact
end

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# File 'opal/stdlib/source_map/map.rb', line 77
def size
 @mappings.size
end

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# File 'opal/stdlib/source_map/map.rb', line 93
def sources
 @sources ||= @mappings.map(&:source).uniq.compact
end

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# File 'opal/stdlib/source_map/map.rb', line 89
def to_s
 @string ||= build_vlq_string
end

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# File 'opal/stdlib/source_map/map.rb', line 123
def |(other)
 return other.dup if self.mappings.empty?
 mappings = []
 other.each do |m|
 om = bsearch(m.original)
 next unless om
 mappings << Mapping .new(
 om.source, m.generated,
 om.original, om.name
 )
 end
 self.class.new(mappings, other.filename)
end