# encoding: utf-8
#
# The <code>repeat</code> method is quite versatile when it comes to define
# the intervals at which the content block should repeat.
#
# The interval may be a symbol (<code>:all</code>, <code>:odd</code>,
# <code>:even</code>), an array listing the pages, a range or a
# <code>Proc</code> that receives the page number as an argument and should
# return true if the content is to be repeated on the given page.
#
# You may also pass an option <code>:dynamic</code> to reevaluate the code block
# on every call which is useful when the content changes based on the page
# number.
#
# It is also important to say that no matter where you define the repeater it
# will be applied to all matching pages.
#
require File.expand_path(File.join(File.dirname(__FILE__),
                                   %w[.. example_helper]))

filename = File.basename(__FILE__).gsub('.rb', '.pdf')
Prawn::Example.generate(filename) do
  repeat(:all) do
    draw_text "All pages", :at => bounds.top_left
  end

  repeat(:odd) do
    draw_text "Only odd pages", :at => [0,0]
  end

  repeat(:even) do
    draw_text "Only even pages", :at => [0,0]
  end

  repeat([1,3,7]) do 
    draw_text "Only on pages 1, 3 and 7", :at => [100,0]
  end

  repeat(2..4) do
    draw_text "From the 2nd to the 4th page", :at => [300,0]
  end

  repeat(lambda { |pg| pg % 3 == 0 }) do
    draw_text "Every third page", :at => [250, 20]
  end
  
  repeat(:all, :dynamic => true) do
    draw_text page_number, :at => [500, 0]
  end

  10.times do 
    start_new_page
    draw_text "A wonderful page", :at => [400,400]
  end
end
