mv lib to app/lib due to upgrade

app/lib/render_pdf.rb

@@ -0,0 +1,172 @@
+require 'prawn/measurement_extensions'
+
+class RotatedCell < Prawn::Table::Cell::Text
+  def initialize(pdf, text, options = {})
+    options[:content] = text
+    options[:valign] = :center
+    options[:align] = :center
+    options[:rotate_around] = :center
+    @rotation = -options[:rotate] || 0
+    super(pdf, [0, pdf.cursor], options)
+  end
+
+  def tan_rotation
+    Math.tan(Math::PI * @rotation / 180)
+  end
+
+  def skew
+    (height + (border_top_width / 2.0) + (border_bottom_width / 2.0)) / tan_rotation
+  end
+
+  def styled_width_of(_text)
+    options = @text_options.reject { |k| k == :style }
+    with_font { (@pdf.height_of(@content, options) + padding_top + padding_bottom) / tan_rotation }
+  end
+
+  def natural_content_height
+    options = @text_options.reject { |k| k == :style }
+    with_font { (@pdf.width_of(@content, options) + padding_top + padding_bottom) * tan_rotation }
+  end
+
+  def draw_borders(pt)
+    @pdf.mask(:line_width, :stroke_color) do
+      x, y = pt
+      from = [[x - skew, y + (border_top_width / 2.0)],
+              to = [x, y - height - (border_bottom_width / 2.0)]]
+
+      @pdf.line_width = @border_widths[3]
+      @pdf.stroke_color = @border_colors[3]
+      @pdf.stroke_line(from, to)
+      @pdf.undash
+    end
+  end
+
+  def draw_content
+    with_font do
+      with_text_color do
+        text_box(width: spanned_content_width + FPTolerance + skew,
+                 height: spanned_content_height + FPTolerance,
+                 at: [1 - skew, @pdf.cursor]).render
+      end
+    end
+  end
+end
+
+class RenderPDF < Prawn::Document
+  include ActionView::Helpers::NumberHelper
+  include ApplicationHelper
+
+  TOP_MARGIN = 36
+  BOTTOM_MARGIN = 23
+  HEADER_SPACE = 9
+  FOOTER_SPACE = 3
+  HEADER_FONT_SIZE = 16
+  FOOTER_FONT_SIZE = 8
+  DEFAULT_FONT = 'OpenSans'
+
+  def initialize(options = {})
+    options[:font_size] ||= FoodsoftConfig[:pdf_font_size].try(:to_f) || 12
+    options[:page_size] ||= FoodsoftConfig[:pdf_page_size] || 'A4'
+    options[:skip_page_creation] = true
+    @options = options
+    @first_page = true
+
+    super(options)
+
+    # Use ttf for better utf-8 compability
+    font_families.update(
+      'OpenSans' => {
+        bold: font_path('OpenSans-Bold.ttf'),
+        italic: font_path('OpenSans-Italic.ttf'),
+        bold_italic: font_path('OpenSans-BoldItalic.ttf'),
+        normal: font_path('OpenSans-Regular.ttf')
+      }
+    )
+
+    header = options[:title] || title
+    footer = I18n.l(Time.now, format: :long)
+
+    header_size = 0
+    header_size = height_of(header, size: HEADER_FONT_SIZE, font: DEFAULT_FONT) + HEADER_SPACE if header
+    footer_size = height_of(footer, size: FOOTER_FONT_SIZE, font: DEFAULT_FONT) + FOOTER_SPACE
+
+    start_new_page(top_margin: TOP_MARGIN + header_size, bottom_margin: BOTTOM_MARGIN + footer_size)
+
+    font DEFAULT_FONT
+
+    repeat :all, dynamic: true do
+      bounding_box [bounds.left, bounds.top + header_size], width: bounds.width, height: header_size do
+        text header, size: HEADER_FONT_SIZE, align: :center, overflow: :shrink_to_fit if header
+      end
+      font_size FOOTER_FONT_SIZE do
+        bounding_box [bounds.left, bounds.bottom - FOOTER_SPACE], width: bounds.width, height: footer_size do
+          text footer, align: :left, valign: :bottom
+        end
+        bounding_box [bounds.left, bounds.bottom - FOOTER_SPACE], width: bounds.width, height: footer_size do
+          text I18n.t('lib.render_pdf.page', number: page_number, count: page_count), align: :right, valign: :bottom
+        end
+      end
+    end
+  end
+
+  def title
+    nil
+  end
+
+  def to_pdf
+    body # Add content, which is defined in subclasses
+    render # Render pdf
+  end
+
+  # Helper method to test pdf via rails console: OrderByGroups.new(order).save_tmp
+  def save_tmp
+    File.write("#{Rails.root}/tmp/#{self.class.to_s.underscore}.pdf", to_pdf.force_encoding("UTF-8"))
+  end
+
+  # @todo avoid underscore instead of unicode whitespace in pdf :/
+  def number_to_currency(number, options = {})
+    super(number, options).gsub("\u202f", ' ') if number
+  end
+
+  def font_size(points = nil, &block)
+    points *= @options[:font_size] / 12 if points
+    super(points, &block)
+  end
+
+  # add pagebreak or vertical whitespace, depending on configuration
+  def down_or_page(space = 10)
+    if @first_page
+      @first_page = false
+      return
+    end
+    if pdf_add_page_breaks?
+      start_new_page
+    else
+      move_down space
+    end
+  end
+
+  protected
+
+  def fontsize(n)
+    n
+  end
+
+  # return whether pagebreak or vertical whitespace is used for breaks
+  def pdf_add_page_breaks?(docid = nil)
+    docid ||= self.class.name.underscore
+    cfg = FoodsoftConfig[:pdf_add_page_breaks]
+    case cfg
+    when Array
+      cfg.index(docid.to_s).any?
+    when Hash
+      cfg[docid.to_s]
+    else
+      cfg
+    end
+  end
+
+  def font_path(name)
+    Rails.root.join('vendor', 'assets', 'fonts', name)
+  end
+end