Class: Crayfish::Html

Inherits:
Object
  • Object
show all
Defined in:
lib/crayfish/html.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(fish, pdf) ⇒ Html

Returns a new instance of Html.



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# File 'lib/crayfish/html.rb', line 69

def initialize fish,pdf
  @fish    = fish
  @pdf     = pdf
end

Instance Attribute Details

#pdf ⇒ Object (readonly)

Returns the value of attribute pdf.



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# File 'lib/crayfish/html.rb', line 67

def pdf
  @pdf
end

Instance Method Details

#apply_style(cell, style) ⇒ Object 



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# File 'lib/crayfish/html.rb', line 105

def apply_style cell,style
  # background-color:#ccccff
  style.split(';').each do |style|
    if /^background-color:#(?<color>.*)$/ =~ style
      cell.background_color = color
    end
  end
end

#asset_paths ⇒ Object 



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# File 'lib/crayfish/html.rb', line 74

def asset_paths
  @@asset_paths ||= ::ActionView::Helpers::AssetTagHelper::AssetPaths.new(::Rails.configuration.action_controller)
end

#compile(node, path = "/#{node.name}", postfix = '', scope = { :table => nil, :tr => nil }) ⇒ Object 



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# File 'lib/crayfish/html.rb', line 136

def compile node, path = "/#{node.name}", postfix='',scope={ :table => nil, :tr => nil }
  name = node.name.to_sym

  case name
  when :img
    image = { :image =>  image_fs_path(node.attributes['src'].value) }
    image[:width]  = node.attributes['width'].value.to_f  if node.attributes['width']
    image[:height] = node.attributes['height'].value.to_f if node.attributes['height']
    if node.attributes['align']
      case node.attributes['align'].value.to_s.to_sym
      when :right
        image[:position] = :right
      when :middle
        image[:position] = :center
      end
    end
    return image

  when :table
    table = []
    table_styles = []
    traverse_children node, "#{path}#{postfix}", :table => table, :table_styles => table_styles, :tr => nil

    # apply style
    full_width = 540
    attribs = { :cell_style => { :inline_format => true } }
    if node.attributes['width'] && /^(?<percent>.*)%$/ =~ node.attributes['width'].value
      attribs[:post_resize] = "#{percent}%"
    end
    attribs[:cell_style][:borders] = [] if node.attributes['border'] && node.attributes['border'].value=='0'

    pdf_table = @pdf.make_table(table, attribs)
    table_styles.each do |style|
      apply_style(pdf_table.row(style[:row]).column(style[:col]),style[:style]) 
    end
    scope[:td] << pdf_table if scope[:td]
    return pdf_table

  when :tbody
    traverse_children node, "#{path}#{postfix}", :table => scope[:table], :table_styles => scope[:table_styles], :tr => nil
    return

  when :tr
    row = []
    traverse_children node, "#{path}#{postfix}", :table => scope[:table], :table_styles => scope[:table_styles], :tr => row
    scope[:table] << row
    return :tr => row

  when :td
    cells = []
    traverse_children node, "#{path}#{postfix}", :table => scope[:table], :table_styles => scope[:table_styles], :tr => scope[:tr], :td => cells
    if cells.size <= 1
      cells << "" if cells.size == 0
      cell = { :content => cells.first.kind_of?(String) ? cells.first.strip : cells.first }
      style cell,node,scope
      scope[:tr] << cell
    else
      scope[:tr] << cells
    end
    return

  when :th
    cells = []
    traverse_children node, "#{path}#{postfix}", :table => scope[:table], :table_styles => scope[:table_styles], :tr => scope[:tr], :td => cells
    if cells.size <= 1
      cells << "" if cells.size == 0
      cell = { :content => "<b>#{cells.first.strip}</b>", :align => :center }
      style cell,node,scope
      scope[:tr] << cell
    else
      scope[:tr] << cells
    end
    return

  when :text
    if scope[:td] and node.content.strip.size > 0
      scope[:td] << node.content.strip
    end
  when :html
  when :body
  else
    ::Rails.logger.debug "\e[1;31munknown node #{node.name} in CrayHtml\e[0m"
  end

  traverse_children node, "#{path}#{postfix}"
end

#draw(text) ⇒ Object 



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# File 'lib/crayfish/html.rb', line 270

def draw text
  doc = Nokogiri::HTML(text)

  doc.children.map do |element|
    compile element
  end.flatten.each do |prawn|
    if prawn.kind_of? Hash
      if prawn.has_key? :image
        pdf.image prawn[:image], prawn
      end
    else
      post_resize prawn,540
      prawn.draw
    end
  end
end

#image_fs_path(image) ⇒ Object 



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# File 'lib/crayfish/html.rb', line 100

def image_fs_path image
  public_path = asset_paths.compute_public_path(image, 'images')
  public_path_to_fs_path(public_path)
end

#post_resize(node, parent_width) ⇒ Object 



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# File 'lib/crayfish/html.rb', line 223

def post_resize node,parent_width
  if node.kind_of?(Prawn::Table::Cell::Subtable)
    post_resize node.subtable,parent_width
  elsif node.kind_of?(Prawn::Table)
    if node.post_resize
      if /^(?<size>.*)%$/ =~ node.post_resize
        new_width = parent_width * size.to_f / 100.0
        column_widths = node.column_widths.dup
        scale = new_width / column_widths.sum
        node.instance_variable_set '@column_widths', nil

        # reset constraints
        (0..node.row_length).map do |n|
          row = node.row(n).columns(0..-1)
          row.each_with_index do |cell,i|
             cell.instance_variable_set '@max_width', column_widths[i]*scale
          end
        end
        node.width = new_width
        node.send(:set_column_widths)
        node.send(:position_cells)
      end
    end

    column_widths = node.column_widths
    (0..node.row_length).map do |n|

      row = node.row(n).columns(0..-1)
      
      row.each_with_index do |cell,i|
        colspan = 1
        row.to_a[i+1..-1].each do |cell|
          break unless cell.kind_of?(Prawn::Table::Cell::SpanDummy)
          colspan += 1
        end
        post_resize cell,column_widths[i..(i+colspan-1)].sum
      end
    end
  elsif node.kind_of? Array
    node.each{ |c| post_resize c,parent_width }
  elsif node.kind_of? Hash
    node.each do |k,v|
      post_resize v,parent_width
    end
  end
end

#public_path_to_fs_path(path) ⇒ Object 



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# File 'lib/crayfish/html.rb', line 78

def public_path_to_fs_path path
  if /^(?<stripped>[^\?]*)\?[0-9]*$/ =~ path
    path = stripped
  end

  search_paths = [::Rails.public_path] + ::Rails.configuration.assets.paths
  search_paths.each do |search_path|
    if File.exists?("#{search_path}/#{path}")
      return "#{search_path}/#{path}"
    end
  end

  if /^\/assets\/(?<path>.*)$/ =~ path
    search_paths.each do |search_path|
      if File.exists?("#{search_path}/#{path}")
        return "#{search_path}/#{path}"
      end
    end
  end
  raise "Could not locate #{path} in #{search_paths.inspect}"
end

#style(cell, node, scope) ⇒ Object 



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# File 'lib/crayfish/html.rb', line 128

def style cell,node,scope
  cell[:colspan] = node.attributes['colspan'].value.to_i if node.attributes['colspan']
  cell[:rowspan] = node.attributes['rowspan'].value.to_i if node.attributes['rowspan']
  cell[:valign]  = :center if cell[:rowspan]
  cell[:align]   = node.attributes['align'].value.to_sym if node.attributes['align']
  scope[:table_styles] << { :row => scope[:table].size, :col => scope[:tr].size, :style => node.attributes['style'].value } if node.attributes['style']
end

#traverse_children(node, path, params = { :table => nil, :tr => nil }) ⇒ Object 



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# File 'lib/crayfish/html.rb', line 114

def traverse_children node,path,params={ :table => nil, :tr => nil }
  count = {}
  node.children.each{ |node| count[node.name.to_sym] = (count[node.name.to_sym]||0) + 1 }
  counters = Hash[*count.map{ |k,v| [k,0] }.flatten]
  node.children.map do |node|
    postfix = ''
    if count[node.name.to_sym] > 1
      postfix = "[#{counters[node.name.to_sym]}]"
      counters[node.name.to_sym] += 1
    end
    compile node, "#{path}/#{node.name}#{postfix}", '', params
  end
end