Class: RBlade::SourceMap

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

Instance Method Summary collapse

Constructor Details

#initialize(template) ⇒ SourceMap

Returns a new instance of SourceMap.



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# File 'lib/rblade/helpers/source_map.rb', line 3

def initialize(template)
  @source_tokens = []
  @compiled_column = 0
  @compiled_offset = 0

  calculate_comment_offsets(template)
end

Instance Method Details

#add(start_offset, end_offset, compiled_code) ⇒ Object 



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# File 'lib/rblade/helpers/source_map.rb', line 18

def add(start_offset, end_offset, compiled_code)
  increment_comment_offset_to start_offset
  start_offset += @current_comment_offset

  # Prevent extending the end offset into a comment
  increment_comment_offset_to end_offset - 1
  end_offset += @current_comment_offset

  lines = StringUtility.lines(compiled_code)

  @source_tokens << {
    start_offset: start_offset,
    end_offset: end_offset,
    compiled_start_line: @compiled_column,
    compiled_start_offset: @compiled_offset,
  }

  @compiled_column += lines.length - 1
  @compiled_offset = (lines.length == 1) ? @compiled_offset + compiled_code.length : lines.last.length
end

#source_location(first_lineno, first_column) ⇒ Object 



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# File 'lib/rblade/helpers/source_map.rb', line 45

def source_location(first_lineno, first_column)
  previous_token = nil

  @source_tokens.each do |token|
    break previous_token if token[:compiled_start_line] > first_lineno ||
      (token[:compiled_start_line] == first_lineno && token[:compiled_start_offset] > first_column)

    previous_token = token
  end

  previous_token
end