Class: Fabulator::Template::ParseResult

Inherits:
Object
  • Object
show all
Defined in:
lib/fabulator/template/parse_result.rb

Instance Method Summary collapse

Constructor Details

#initialize(text) ⇒ ParseResult

Returns a new instance of ParseResult.



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# File 'lib/fabulator/template/parse_result.rb', line 6

def initialize(text)
  ## we want to build up the XPath expression for structural and
  ## interactive elements for use in adding default info and
  ## building names for those elements -- saves the XSLT from having
  ## to do this

  structurals = { }
  interactives = { }

  Fabulator::TagLib.namespaces.each_pair do |ns, ob|
    x = ob.presentation.structurals || []
    structurals[ns] = x unless x.nil? || x.empty?
    x = ob.presentation.interactives || []
    interactives[ns] = x unless x.nil? || x.empty?
  end

  @namespaces = { }
  i = 1
  (structurals.keys + interactives.keys).uniq.sort.each do |ns|
    @namespaces["fab_ns_#{i.to_s}"] = ns
    i += 1
  end

  structural_xpaths = []
  interactive_xpaths = []
  interesting_xpaths = [ ]
  @fab_prefix = ''

  @namespaces.keys.each do |p|
    @fab_prefix = p if @namespaces[p] == Fabulator::FAB_NS
    structural_xpaths += structurals[@namespaces[p]].collect{ |e| "ancestor::#{p}:#{e}" }
    interactive_xpaths += interactives[@namespaces[p]].collect{ |e| "//#{p}:#{e}" }
    interesting_xpaths += structurals[@namespaces[p]].collect{ |e| "//#{p}:#{e}" }
  end

  @structural_xpath = structural_xpaths.join("[@id != ''] | ") + "[@id != '']"
  @interactive_xpath = interactive_xpaths.join(" | ")

  @interesting_xpath = (interactive_xpaths + interesting_xpaths).join(" | ")

  @namespaces = @namespaces.collect{ |k,v| "#{k}:#{v}" }

  ## We also may do our dependency tree -- namespaces in the
  ## root element of the stylesheet will be run after the current
  ## stylesheet

  @doc = LibXML::XML::Document.string text

  @fab_ns = nil
  @doc.root.namespaces.each do |ns|
    if ns.href == Fabulator::FAB_NS
      @fab_ns = ns
    end
  end

  if @fab_ns.nil?
    @fab_ns = XML::Namespace.new(@doc.root, @fab_prefix, Fabulator::FAB_NS)
  end
end

Instance Method Details

#add_captions(captions = { }) ⇒ Object 



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# File 'lib/fabulator/template/parse_result.rb', line 116

def add_captions(captions = { })
  each_element do |el|
    id = el_id(el)
    next if id == ''
    caption = nil
    if captions.is_a?(Hash)
      caption = captions[id]
    else
      caption = captions.traverse_path(id.split('.')).first.to_s
    end

    next if caption.nil?

    is_grid = false
    if el.name == 'grid'
    else
      cap = el.find_first("./#{@fab_prefix}:caption", @namespaces)
      if cap.nil?
        el << text_node('caption', caption)
      else
        cap.content = caption
        cap.parent << text_node('caption', caption)
        cap.remove!
      end
    end
  end
end

#add_default_values(context) ⇒ Object

This function walks through all of the elements in the provided markup and adds f:default child elements. TagLibs declare data elements that should receive default values.



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# File 'lib/fabulator/template/parse_result.rb', line 69

def add_default_values(context)
  return if context.nil?
  each_form_element do |el|
    own_id = el.attributes['id']
    next if own_id.nil? || own_id.to_s == ''

    default = nil
    default = el.find("./#{@fab_prefix}:default", @namespaces).to_a

    id = el_id(el)
    ids = id.split('/')
    l = context.traverse_path(ids)
    if !l.nil? && !l.empty?
      if !default.nil? && !default.empty?
        default.each { |d| d.remove! }
      end
      l.collect{|ll| ll.value}.each do |v|
        el << text_node('default', v)
      end
    end
  end
end

#add_errors(errors = { }) ⇒ Object 



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# File 'lib/fabulator/template/parse_result.rb', line 101

def add_errors(errors = { })
  each_form_element do |el|
    id = el_id(el)
    next if id == ''
    next unless errors.has_key?(id)
    if errors[id].is_a?(Array)
      errors[id].each do |e|
        el << text_node('error', e) 
      end
    else
      el << text_node('error', errors[id])
    end
  end
end

#add_missing_values(missing = [ ]) ⇒ Object 



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# File 'lib/fabulator/template/parse_result.rb', line 92

def add_missing_values(missing = [ ])
  each_form_element do |el|
    id = el_id(el)
    next if id == ''
    next unless missing.include?(id)
    el.attributes["missing"] = "1"
  end
end

#to_html(popts = { }) ⇒ Object 



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# File 'lib/fabulator/template/parse_result.rb', line 148

def to_html(popts = { })
  opts = { :form => true, :theme => 'coal' }.update(popts)

  deps = { }
  Fabulator::TagLib.namespaces.each_pair do |ns, ob|
    deps[ns] = ob.presentation.get_root_namespaces(:html) & (Fabulator::TagLib.namespaces.keys) - [ ns ]
  end

  ordered_ns = [ ]

  next_round = ([ Fabulator::FAB_NS ] + deps.keys.select { |k| deps[k].empty? }).uniq

  while !next_round.empty? do
    next_round.each { |k| deps.delete(k) }

    ordered_ns += next_round

    deps.keys.each do |k|
      deps[k] -= ordered_ns
    end

    next_round = deps.keys.select{ |k| deps[k].empty? }
  end

  ordered_ns.reverse!

  res = @doc
  ordered_ns.each do |ns|
    ob = Fabulator::TagLib.namespaces[ns]
    next if ob.nil?
    res = ob.presentation.transform(:html, res, opts)
  end

  ret = ''
  if opts[:form]
    ret = res.to_s.gsub(/^\s*<\?xml\s+.*?\?>\s*/, '').gsub(/xmlns(:\S+)?=['"][^'"]*['"]/, '').gsub(/\s+/, ' ').gsub(/\s+>/, '>')
  else
    ret = res.find('//form/*').collect{ |e| e.to_s}.join('').gsub(/^\s*<\?xml\s+.*?\?>\s*/, '').gsub(/xmlns(:\S+)?=['"][^'"]*['"]/, '').gsub(/\s+/, ' ').gsub(/\s+>/, '>')

  end

  ret.gsub!(/<(div\s*[^<]*?)\/>/, "<\\1></div>")
  ret.gsub!(/<(span\s*[^<]*?)\/>/, "<\\1></span>")
  ret
end

#to_s ⇒ Object 



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# File 'lib/fabulator/template/parse_result.rb', line 144

def to_s
  @doc.to_s.gsub(/^\s*<\?xml\s+.*?\?>\s*/, '')
end