module PdfHelper
require 'prince'
def self.included(base)
base.class_eval do
alias_method_chain :render, :princely
end
end
def render_with_princely(options = nil, *args, &block)
if options.is_a?(Hash) && options.has_key?(:pdf)
options[:name] ||= options.delete(:pdf)
make_and_send_pdf(options.delete(:name), options)
else
render_without_princely(options, *args, &block)
end
end
private
def make_pdf(options = {})
options[:stylesheets] ||= []
options[:layout] ||= false
options[:template] ||= File.join(controller_path,action_name)
prince = Prince.new()
# Sets style sheets on PDF renderer
prince.add_style_sheets(*options[:stylesheets].collect{|style| stylesheet_file_path(style)})
html_string = render_to_string(:template => options[:template], :layout => options[:layout])
# Make all paths relative, on disk paths...
html_string.gsub!(".com:/",".com/") # strip out bad attachment_fu URLs
html_string.gsub!( /src=["']+([^:]+?)["']/i ) { |m| "src=\"#{RAILS_ROOT}/public/" + $1 + '"' } # re-route absolute paths
# Remove asset ids on images with a regex
html_string.gsub!( /src=["'](\S+\?\d*)["']/i ) { |m| 'src="' + $1.split('?').first + '"' }
# Send the generated PDF file from our html string.
return prince.pdf_from_string(html_string)
end
def make_and_send_pdf(pdf_name, options = {})
send_data(
make_pdf(options),
:filename => pdf_name + ".pdf",
:type => 'application/pdf'
)
end
def stylesheet_file_path(stylesheet)
stylesheet = stylesheet.to_s.gsub(".css","")
File.join(ActionView::Helpers::AssetTagHelper::STYLESHEETS_DIR,"#{stylesheet}.css")
end
end
