Module: Zafu::ParsingRules

Defined in:
lib/zafu/parsing_rules.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#context ⇒ Object (readonly)

The context informs the rendering element about the current Node, node class, existing ids, etc. The context is inherited by sub-elements.



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# File 'lib/zafu/parsing_rules.rb', line 7

def context
  @context
end

#helper ⇒ Object (readonly)

The helper is used to connect the compiler to the world of the application (read/write templates, access traductions, etc)



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# File 'lib/zafu/parsing_rules.rb', line 10

def helper
  @helper
end

#markup ⇒ Object

The markup (of class Markup) holds information on the tag (<li>), tag attributes (.. class=‘foo’) and indentation information that should be used when rendered. This context is not inherited.



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# File 'lib/zafu/parsing_rules.rb', line 14

def markup
  @markup
end

Instance Method Details

#before_parse(text) ⇒ Object 



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# File 'lib/zafu/parsing_rules.rb', line 80

def before_parse(text)
  text.gsub('<%', '&lt;%').gsub('%>', '%&gt;')
end

#scan ⇒ Object

scan rules



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# File 'lib/zafu/parsing_rules.rb', line 85

def scan
  # puts "SCAN(#{@method}): [#{@text}]"
  if @text =~ /\A([^<]*?)(^ *|)</m
    flush $1
    eat $2
    if @text[1..1] == '/'
      store $2
      scan_close_tag
    elsif @text[0..3] == '<!--'
      scan_html_comment(:space_before=> $2)
    elsif @text[0..8] == '<![CDATA['
      flush '<![CDATA['
    else
      scan_tag(:space_before=> $2)
    end
  else
    # no more tags
    flush
  end
end

#scan_asset ⇒ Object 



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# File 'lib/zafu/parsing_rules.rb', line 212

def scan_asset
  # puts "ASSET(#{object_id}) [#{@text}]"
  if @text =~ /\A<(\w*)([^>]*?)(\/?)>/
    eat $&
    @method = 'rename_asset'
    @markup.tag = @end_tag = $1
    closed = ($3 != '')
    @params = parse_params($2)
    if closed
      leave(:asset)
    elsif @markup.tag == 'script'
      enter(:void)
    else
      enter(:inside_asset)
    end
  else
    # error
    @method = 'void'
    flush
  end
end

#scan_close_tag ⇒ Object 



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# File 'lib/zafu/parsing_rules.rb', line 106

def scan_close_tag
  if @text =~ /\A<\/([^>]+)>( *\n+|)/m
    # puts "CLOSE:[#{$&}]}" # ztag
    # closing tag
    if $1 == @end_tag
      @end_tag_count -= 1
      if @end_tag_count == 0
        if @end_tag == 'script'
          flush $& # keep closing tag
        else
          eat $&
        end
        @markup.space_after = $2
        leave
      else
        # keep the tag (false alert)
        flush $&
      end
    elsif $1[0..1] == 'r:'
      # /rtag
      eat $&
      if $1 != @end_tag
        # error bad closing rtag
        store "<span class='parser_error'>#{$&.gsub('<', '&lt;').gsub('>','&gt;')} should be &lt;/#{@end_tag}&gt;</span>"
      end
      leave
    else
      # other html tag closing
      flush $&
    end
  else
    # error
    flush
  end
end

#scan_html_comment(opts = {}) ⇒ Object 



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# File 'lib/zafu/parsing_rules.rb', line 142

def scan_html_comment(opts={})
  if @text =~ /\A<!--\|(.*?)-->/m
    # zafu html escaped
    eat $&
    @text = opts[:space_before] + $1 + @text
  elsif @text =~ /\A<!--.*?-->/m
    # html comment
    flush $&
  else
    # error
    flush
  end
end

#scan_inside_asset ⇒ Object 



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# File 'lib/zafu/parsing_rules.rb', line 234

def scan_inside_asset
  if @text =~ /\A(.*?)<\/#{@end_tag}>/m
    flush $&
    leave(:asset)
  else
    # never ending asset
    flush
  end
end

#scan_style ⇒ Object 



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# File 'lib/zafu/parsing_rules.rb', line 244

def scan_style
  if @text =~ /\A(.*?)<\/style>/m
    flush $&
    @method = 'rename_asset'
    @markup.tag = 'style'
    leave(:style)
  else
    # error
    @method = 'void'
    flush
  end
end

#scan_tag(opts = {}) ⇒ Object 



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# File 'lib/zafu/parsing_rules.rb', line 156

def scan_tag(opts={})
  #puts "TAG(#{@method}): [#{@text}]"
  if @text =~ /\A<r:([\w_]+)([^>]*?)(\/?)>/
    #puts "RTAG:#{$~.to_a.inspect}" # ztag
    eat $&
    opts.merge!(:method=>$1, :params=>$2)
    opts.merge!(:text=>'') if $3 != ''
    make(:void, opts)
  elsif @text =~ /\A<(\w+)([^>]*?)do\s*=('([^>]*?[^\\]|)'|"([^>]*?[^\\]|)")([^>]*?)(\/?)>/
    #puts "DO:#{$~.to_a.inspect}" # do tag
    eat $&
    opts.merge!(:method=>($4||$5), :html_tag=>$1, :html_tag_params=>$2, :params=>$6)
    opts.merge!(:text=>'') if $7 != ''
    make(:void, opts)
  elsif @options[:form] && @text =~ /\A<(input|select|textarea|form)([^>]*?)(\/?)>/
    eat $&
    method = $1 == 'form' ? 'form_tag' : $1 # <form> ==> r_form_tag, <r:form> ==> r_form
    opts.merge!(:method=>method, :params=>$2)
    opts.merge!(:text=>'') if $3 != ''
    opts.merge!(:end_tag=>'form') if method == 'form_tag'
    make(:void, opts)
  elsif @text =~ /\A<(\w+)(([^>]*?)\#\{([^>]*?))(\/?)>/
    # html tag with dynamic params
    #puts "OTHER_DYN:[#{$&}]"

    eat $&
    opts.merge!(:method => 'void', :html_tag => $1, :html_tag_params => $2, :params => {})
    opts.merge!(:text=>'') if $5 != ''
    make(:void, opts)
  elsif @text =~ /\A<(\w+)([^>]*?)id\s*=('[^>]*?[^\\]'|"[^>]*?[^\\]")([^>]*?)(\/?)>/
    #puts "ID:#{$~.to_a.inspect}" # id tag
    eat $&
    opts.merge!(:method=>'void', :html_tag=>$1, :params=>{:id => $3[1..-2]}, :html_tag_params=>"#{$2}id=#{$3}#{$4}")
    opts.merge!(:text=>'') if $5 != ''
    make(:void, opts)
  elsif @end_tag && @text =~ /\A<#{@end_tag}([^>]*?)(\/?)>/
    #puts "SAME:#{$~.to_a.inspect}" # simple html tag same as end_tag
    flush $&
    @end_tag_count += 1 unless $2 == '/'
  elsif @text =~ /\A<(link|img|script)/
    #puts "HTML:[#{$&}]" # html
    make(:asset)
  elsif @text =~ /\A<style>/
    flush $&
    make(:style)
  elsif @text =~ /\A[^>]*?>/
    # html tag
    #puts "OTHER:[#{$&}]"
    store opts[:space_before]
    flush $&
  else
    # never closed tag
    flush
  end
end

#start(mode) ⇒ Object

This callback is run just after the block is initialized (Parser#initialize).



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# File 'lib/zafu/parsing_rules.rb', line 17

def start(mode)
  # tag_context
  @markup = Markup.new(@options.delete(:html_tag))

  # html_tag
  @markup.params = @options.delete(:html_tag_params) # @html_tag_params

  # have we already wrapped the result with our tag ?
  @markup.done = false # @html_tag_done

  # end_tag is used to know when to close parsing in sub-do
  # Example:
  # <li do='each' do='images'>
  #   <ul>
  #     <li><r:link/></li> <!-- do not close outer LI now: @end_tag_count != 0 -->
  #   </ul>
  # </li> <!-- close outer LI now: @end_tag_count == 0 -->
  #
  @end_tag = @markup.tag || @options.delete(:end_tag) || "r:#{@method}"
  @end_tag_count  = 1

  # code indentation
  @markup.space_before = @options.delete(:space_before) # @space_before

  # form capture (input, select, textarea, form)
  # FIXME: what is this ???
  @options[:form] ||= true if @method == 'form'

  # puts "[#{@markup[:space_before]}(#{@method})#{@markup[:space_after]}]"
  if @params =~ /\A([^>]*?)do\s*=('|")([^\2]*?[^\\])\2([^>]*)\Z/
    # we have a sub 'do'
    @params = Markup.parse_params($1)
    @sub_do = $3 # this is used by replace_with (FIXME)

    opts = {:method=>$3, :params=>$4}

    # the matching zafu tag will be parsed by the last 'do', we must inform it to halt properly :
    opts[:end_tag] = @end_tag

    sub = make(:void, opts)
    @markup.space_after = sub.markup.space_after
    sub.markup.space_after = ""
  else
    @params = Markup.parse_params(@params)
  end

  # set name used for include/replace from html_tag if not allready set by superclass
  @name = @options[:name] || @params[:name] || @params[:id] || @markup.params[:id]

  if !@markup.tag && (@markup.tag = @params.delete(:tag))
    # Extract html tag parameters from @params
    @markup.steal_html_params_from(@params)
  end

  if @method == 'include'
    include_template
  elsif mode == :tag && !sub
    scan_tag
  elsif !sub
    enter(mode)
  end
end