37 lines
806 B
Ruby
37 lines
806 B
Ruby
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require 'html5lib/constants'
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require 'html5lib/filters/base'
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module HTML5lib
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module Filters
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class WhitespaceFilter < Base
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SPACE_PRESERVE_ELEMENTS = %w[pre textarea] + RCDATA_ELEMENTS
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SPACES = /[#{SPACE_CHARACTERS.join('')}]+/m
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def each
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preserve = 0
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__getobj__.each do |token|
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case token[:type]
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when :StartTag
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if preserve > 0 or SPACE_PRESERVE_ELEMENTS.include?(token[:name])
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preserve += 1
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end
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when :EndTag
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preserve -= 1 if preserve > 0
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when :SpaceCharacters
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next if preserve == 0
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when :Characters
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token[:data] = token[:data].sub(SPACES,' ') if preserve == 0
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end
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yield token
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end
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end
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end
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end
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end
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