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A nanoc filter for stripping blank lines and extraneous whitespace.
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module Nanoc::Filters | |
class Compact < Nanoc::Filter | |
identifier :compact | |
def run(content, params={}) | |
count_pre = 0 | |
content.split("\n").each do |line| | |
line << "\n" | |
line.match('<pre>') { |m| count_pre +=1 } | |
line.match('</pre>') { |m| count_pre -=1 } | |
line.match('<code>') { |m| count_pre +=1 } | |
line.match('</code>') { |m| count_pre -=1 } | |
line.match('<script') { |m| count_pre +=1 } | |
line.match('</script>') { |m| count_pre -=1 } | |
# if we're inside any number of <pre> blocks, skip the reduction | |
if 0 == count_pre | |
line.gsub!(/[\r\n]/,' ') # turn line endings into spaces | |
line.gsub!(/\s+/,' ') # reduce serial whitespace to 1 character | |
line.gsub!(/>\s+</,'><') # zap whitespace between tags | |
line.gsub!(/>\s+$/,'>') # zap whitespace after tags | |
line.gsub!(/^\s+</,'<') # zap whitespace before tags | |
line.gsub!(/^\s*$/,'') # zap empty lines | |
else | |
line.gsub!(/^\s+<pre>/ , '<pre>') | |
line.gsub!(/^\s+<code>/ , '<code>') | |
line.gsub!(/^\s+<script/, '<script') | |
end | |
end.join('') | |
end | |
end | |
end |
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