Class: WikiCloth::WikiBuffer::Var

Inherits:
WikiCloth::WikiBuffer show all
Defined in:
lib/wikicloth/wiki_buffer/var.rb

Instance Method Summary collapse

Methods inherited from WikiCloth::WikiBuffer

#add_char, #add_word, #buffer_type, #buffers, #check_globals, #data, #debug, #eof, #get_param, #in_template?, #params, #run_globals?

Constructor Details

#initialize(data = "", options = {}) ⇒ Var

Returns a new instance of Var.



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# File 'lib/wikicloth/wiki_buffer/var.rb', line 9

def initialize(data="",options={})
  super(data,options)
  self.buffer_type = "var"
  @in_quotes = false
  @tag_start = true
  @tag_size = 2
  @close_size = 2
  @fname = nil
end

Instance Method Details

#default_functions(name, params) ⇒ Object 



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# File 'lib/wikicloth/wiki_buffer/var.rb', line 110

def default_functions(name,params)
  case name
  when "#if"
    params.first.blank? ? params[2] : params[1]
  when "#switch"
    match = params.first
    default = nil
    for p in params[1..-1]
      temp = p.split("=")
      if p !~ /=/ && temp.length == 1 && p == params.last
        return p
      elsif temp.instance_of?(Array) && temp.length > 0
        test = temp.first.strip
        default = temp[1..-1].join("=").strip if test == "#default"
        return temp[1..-1].join("=").strip if test == match || (test == "none" && match.blank?)
      end
    end
    default.nil? ? "" : default
  when "#expr"
    begin
      ExpressionParser::Parser.new.parse(params.first)
    rescue RuntimeError
      I18n.t('expression error', :error => $!)
    end
  when "#ifexpr"
    val = false
    begin
      val = ExpressionParser::Parser.new.parse(params.first)
    rescue RuntimeError
    end
    if val
      params[1]
    else
      params[2]
    end
  when "#ifeq"
    if params[0] =~ /^[0-9A-Fa-f]+$/ && params[1] =~ /^[0-9A-Fa-f]+$/
      params[0].to_i == params[1].to_i ? params[2] : params[3]
    else
      params[0] == params[1] ? params[2] : params[3]
    end
  when "#len"
    params.first.length
  when "#sub"
    params.first[params[1].to_i,params[2].to_i]
  when "#pad"
    case params[3]
    when "right"
      params[0].ljust(params[1].to_i,params[2])
    when "center"
      params[0].center(params[1].to_i,params[2])
    else
      params[0].rjust(params[1].to_i,params[2])
    end
  when "#iferror"
    params.first =~ /error/ ? params[1] : params[2]
  when "#capture"
    @options[:params][params.first] = params[1]
    ""
  when "urlencode"
    URI.escape(params.first, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]"))
  when "lc"
    params.first.downcase
  when "uc"
    params.first.upcase
  when "ucfirst"
    params.first.capitalize
  when "lcfirst"
    params.first[0,1].downcase + params.first[1..-1]
  when "anchorencode"
    params.first.gsub(/\s+/,'_')
  when "plural"
    begin
      expr_value = ExpressionParser::Parser.new.parse(params.first)
      expr_value.to_i == 1 ? params[1] : params[2]
    rescue RuntimeError
      I18n.t('expression error', :error => $!)
    end
  when "ns"
    values = {
      "" => "", "0" => "",
      "1" => localise_ns("Talk"), "talk" => localise_ns("Talk"),
      "6" => localise_ns("File"), "file" => localise_ns("File"), "image" => localise_ns("File"),
      "10" => localise_ns("Template"), "template" => localise_ns("Template"),
      "14" => localise_ns("Category"), "category" => localise_ns("Category"),
      "-1" => localise_ns("Special"), "special" => localise_ns("Special"),
      "12" => localise_ns("Help"), "help" => localise_ns("Help"),
      "-2" => localise_ns("Media"), "media" => localise_ns("Media") }

    values[localise_ns(params.first,:en).gsub(/\s+/,'_').downcase]
  when "#language"
    WikiNamespaces.language_name(params.first)
  when "#tag"
    return "" if params.empty?
    elem = Builder::XmlMarkup.new
    return elem.tag!(params.first) if params.length == 1
    return elem.tag!(params.first) { |e| e << params.last } if params.length == 2
    tag_attrs = {}
    params[1..-2].each do |attr|
      tag_attrs[$1] = $2 if attr =~ /^\s*([\w]+)\s*=\s*"(.*)"\s*$/
    end
    elem.tag!(params.first,tag_attrs) { |e| e << params.last }
  when "debug"
    ret = nil
    case params.first
    when "param"
      @options[:buffer].buffers.reverse.each do |b|
        if b.instance_of?(WikiBuffer::HTMLElement) && b.element_name == "template"
           ret = b.get_param(params[1])
        end
      end
      ret
    when "buffer"
      ret = "<pre>"
      buffer = @options[:buffer].buffers
      buffer.each do |b|
        ret += " --- #{b.class}"
        ret += b.instance_of?(WikiBuffer::HTMLElement) ? " -- #{b.element_name}\n" : " -- #{b.data}\n"
      end
      "#{ret}</pre>"
    end
  end
end

#function_name ⇒ Object 



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# File 'lib/wikicloth/wiki_buffer/var.rb', line 43

def function_name
  @fname.nil? ? nil : @fname.strip
end

#is_function? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wikicloth/wiki_buffer/var.rb', line 242

def is_function?
  self.function_name.nil? || self.function_name.blank? ? false : true
end

#is_param? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wikicloth/wiki_buffer/var.rb', line 238

def is_param?
  @tag_size == 3 ? true : false
end

#localise_ns(name, lang = nil) ⇒ Object 



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# File 'lib/wikicloth/wiki_buffer/var.rb', line 234

def localise_ns(name,lang=nil)
  WikiNamespaces.localise_ns(name,lang)
end

#skip_html? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wikicloth/wiki_buffer/var.rb', line 31

def skip_html?
  false
end

#skip_links? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wikicloth/wiki_buffer/var.rb', line 27

def skip_links?
  false
end

#tag_size ⇒ Object 



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# File 'lib/wikicloth/wiki_buffer/var.rb', line 19

def tag_size
  @tag_size
end

#tag_size=(val) ⇒ Object 



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# File 'lib/wikicloth/wiki_buffer/var.rb', line 23

def tag_size=(val)
  @tag_size = val
end

#tag_start ⇒ Object 



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# File 'lib/wikicloth/wiki_buffer/var.rb', line 35

def tag_start
  @tag_start
end

#tag_start=(val) ⇒ Object 



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# File 'lib/wikicloth/wiki_buffer/var.rb', line 39

def tag_start=(val)
  @tag_start = val
end

#to_html ⇒ Object 



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# File 'lib/wikicloth/wiki_buffer/var.rb', line 47

def to_html
  return "" if will_not_be_rendered

  if self.is_function?
    if Extension.function_exists?(function_name)
      return Extension.functions[function_name][:klass].new(@options).instance_exec( params.collect { |p| p.strip }, &Extension.functions[function_name][:block] ).to_s
    end
    ret = default_functions(function_name,params.collect { |p| p.strip })
    ret ||= @options[:link_handler].function(function_name, params.collect { |p| p.strip })
    ret.to_s
  elsif self.is_param?
    ret = nil
    @options[:buffer].buffers.reverse.each do |b|
      ret = b.get_param(params[0],params[1]) if b.instance_of?(WikiBuffer::HTMLElement) && b.element_name == "template"
      break unless ret.nil?
    end
    ret.to_s
  else
    # put template at beginning of buffer
    template_stack = @options[:buffer].buffers.collect { |b| b.get_param("__name") if b.instance_of?(WikiBuffer::HTMLElement) && 
      b.element_name == "template" }.compact
    if template_stack.last == params[0]
      debug_tree = @options[:buffer].buffers.collect { |b| b.debug }.join("-->")
      "<span class=\"error\">#{I18n.t('template loop detected', :tree => debug_tree)}</span>"
    else
      key = params[0].to_s.strip
      key_options = params[1..-1].collect { |p| p.is_a?(Hash) ? { :name => p[:name].strip, :value => p[:value].strip } : p.strip }
      key_options ||= []
      key_digest = Digest::MD5.hexdigest(key_options.to_a.sort {|x,y| (x.is_a?(Hash) ? x[:name] : x) <=> (y.is_a?(Hash) ? y[:name] : y) }.inspect)

      return @options[:params][key] if @options[:params].has_key?(key)
      # if we have a valid cache fragment use it
      return @options[:cache][key][key_digest] unless @options[:cache].nil? || @options[:cache][key].nil? || @options[:cache][key][key_digest].nil?

      ret = @options[:link_handler].include_resource(key,key_options).to_s

      ret.gsub!(/<!--(.|\s)*?-->/,"")
      count = 0
      tag_attr = key_options.collect { |p|
        if p.instance_of?(Hash)
          "#{p[:name]}=\"#{p[:value].gsub(/"/,'&quot;')}\""
        else
          count += 1
          "#{count}=\"#{p.gsub(/"/,'&quot;')}\""
        end
      }.join(" ")

      self.data = ret.blank? ? "" : "<template __name=\"#{key}\" __hash=\"#{key_digest}\" #{tag_attr}>#{ret}</template>"
      ""
    end
  end
end

#will_not_be_rendered ⇒ Object 



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# File 'lib/wikicloth/wiki_buffer/var.rb', line 100

def will_not_be_rendered
  @options[:buffer].buffers.reverse.each do |buffer|
    if buffer.instance_of?(WikiBuffer::Var) && buffer.is_function?
      return true if buffer.function_name == "#if" && buffer.params.size == 2 && buffer.params[0].strip.blank?
      return true if buffer.function_name == "#if" && buffer.params.size == 3 && !buffer.params[0].strip.blank?
    end
  end
  false
end