instiki/vendor/plugins/HTML5lib/lib/html5/serializer/htmlserializer.rb

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require 'html5/constants'
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module HTML5
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class HTMLSerializer
def self.serialize(stream, options = {})
new(options).serialize(stream, options[:encoding])
end
def escape(string)
string.gsub("&", "&amp;").gsub("<", "&lt;").gsub(">", "&gt;")
end
def initialize(options={})
@quote_attr_values = false
@quote_char = '"'
@use_best_quote_char = true
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@minimize_boolean_attributes = true
@use_trailing_solidus = false
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@space_before_trailing_solidus = true
@escape_lt_in_attrs = false
@escape_rcdata = false
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@omit_optional_tags = true
@sanitize = false
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@strip_whitespace = false
@inject_meta_charset = true
options.each do |name, value|
next unless instance_variables.include?("@#{name}")
@use_best_quote_char = false if name.to_s == 'quote_char'
instance_variable_set("@#{name}", value)
end
@errors = []
end
def serialize(treewalker, encoding=nil)
in_cdata = false
@errors = []
if encoding and @inject_meta_charset
require 'html5/filters/inject_meta_charset'
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treewalker = Filters::InjectMetaCharset.new(treewalker, encoding)
end
if @strip_whitespace
require 'html5/filters/whitespace'
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treewalker = Filters::WhitespaceFilter.new(treewalker)
end
if @sanitize
require 'html5/filters/sanitizer'
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treewalker = Filters::HTMLSanitizeFilter.new(treewalker)
end
if @omit_optional_tags
require 'html5/filters/optionaltags'
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treewalker = Filters::OptionalTagFilter.new(treewalker)
end
result = []
treewalker.each do |token|
type = token[:type]
if type == :Doctype
doctype = "<!DOCTYPE %s>" % token[:name]
result << doctype
elsif [:Characters, :SpaceCharacters].include? type
if type == :SpaceCharacters or in_cdata
if in_cdata and token[:data].include?("</")
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serialize_error("Unexpected </ in CDATA")
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end
result << token[:data]
else
result << escape(token[:data])
end
elsif [:StartTag, :EmptyTag].include? type
name = token[:name]
if RCDATA_ELEMENTS.include?(name) and not @escape_rcdata
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in_cdata = true
elsif in_cdata
serialize_error(_("Unexpected child element of a CDATA element"))
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end
attributes = []
for k,v in attrs = token[:data].to_a.sort
attributes << ' '
attributes << k
if not @minimize_boolean_attributes or \
(!(BOOLEAN_ATTRIBUTES[name]||[]).include?(k) \
and !BOOLEAN_ATTRIBUTES[:global].include?(k))
attributes << "="
if @quote_attr_values or v.empty?
quote_attr = true
else
quote_attr = (SPACE_CHARACTERS + %w(< > " ')).any? {|c| v.include?(c)}
end
v = v.gsub("&", "&amp;")
v = v.gsub("<", "&lt;") if @escape_lt_in_attrs
if quote_attr
quote_char = @quote_char
if @use_best_quote_char
if v.index("'") and !v.index('"')
quote_char = '"'
elsif v.index('"') and !v.index("'")
quote_char = "'"
end
end
if quote_char == "'"
v = v.gsub("'", "&#39;")
else
v = v.gsub('"', "&quot;")
end
attributes << quote_char << v << quote_char
else
attributes << v
end
end
end
if VOID_ELEMENTS.include?(name) and @use_trailing_solidus
if @space_before_trailing_solidus
attributes << " /"
else
attributes << "/"
end
end
result << "<%s%s>" % [name, attributes.join('')]
elsif type == :EndTag
name = token[:name]
if RCDATA_ELEMENTS.include?(name)
in_cdata = false
elsif in_cdata
serialize_error(_("Unexpected child element of a CDATA element"))
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end
end_tag = "</#{name}>"
result << end_tag
elsif type == :Comment
data = token[:data]
serialize_error("Comment contains --") if data.index("--")
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comment = "<!--%s-->" % token[:data]
result << comment
else
serialize_error(token[:data])
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end
end
if encoding and encoding != 'utf-8'
require 'iconv'
Iconv.iconv(encoding, 'utf-8', result.join('')).first
else
result.join('')
end
end
alias :render :serialize
def serialize_error(data="XXX ERROR MESSAGE NEEDED")
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# XXX The idea is to make data mandatory.
@errors.push(data)
if @strict
raise SerializeError
end
end
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end
# Error in serialized tree
class SerializeError < Exception
end
end