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# File 'opal/lib/opal/parser/patch.rb', line 90
def dedent(string)
original_encoding = string.encoding
lines = string.force_encoding(Encoding::BINARY).split("\\\n")
if lines.length == 1
lines = [string.force_encoding(original_encoding)]
else
lines.map! { |s| s.force_encoding(original_encoding) }
end
lines.each_with_index do |line, index|
next if (index == 0) && !@at_line_begin
left_to_remove = @dedent_level
remove = 0
line.each_char do |char|
break if left_to_remove <= 0
case char
when "\s"
remove += 1
left_to_remove -= 1
when "\t"
break if TAB_WIDTH * (remove / TAB_WIDTH + 1) > @dedent_level
remove += 1
left_to_remove -= TAB_WIDTH
else
break
end
end
lines[index] = line[remove..-1]
end
string = lines.join
@at_line_begin = string.end_with?("\n")
string
end
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