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require "rghost/ps_object"
require "rghost/units"
require "rghost/load"
require "rghost/constants"
require "rghost/ruby_to_ps"
# Paper is the area where the Postscript elements/objects are drawn.
# The margin is the document's non-printable area (both by the cursors and by the page's internal controllers).
# The :area_x and :area_y are the printable section of the paper.
# It's used to configure definitions of paper. It automatically defined into Document by :paper parameter.
#
# link:images/paper01.png
#
class RGhost::Paper < RGhost::PsObject
DEFAULT_OPTIONS = {landscape: false,
margin_top: 1,
margin_right: 1,
margin_bottom: 1,
margin_left: 1,
duplex: false,
tumble: false}
attr_reader :paper, :landscape
include RGhost::RubyToPs
#===Examples
#
#====Create paper by name
# doc=Document.new :paper => :A4
#====Create paper by name in landscape
# doc=Document.new :paper => :A4 , :landscape => true
#====Create custom paper
# doc=Document.new :paper => [10,15]
#====Defining all margins
# doc=Document.new :paper => :A5, :margin => 0.5
#====Defining custom margins
# doc=Document.new :paper => :A5, :margin => [0.5, 1, 0.5, 2] #=>[top,right,bottom,left] clockwise
#====Defining particular margin
# doc=Document.new :paper => :A5, :margin_top => 1, :margin_left => 0.3
#====Defining two faces document to printer
# doc=Document.new :paper => :A5, :duplex => true
#===Parameters
# * paper - The paper parameter can be either a Symbol or a Array. If paper parameter is a Symbol its value will search in RGhost::Constants::Papers . If paper parameter is a Array(with two numeric elements) will be position [0] width and [1] height of page. Example:
# doc=Document.new :paper => :A3 #=> Build new A3 paper
# doc=Document.new :paper => [5,5] #=> Build new custom paper 5x5, using default unit defined in RGhost::Config::GS[:unit].
#
#====Configuration options:
# * <tt>:landscape</tt> - If set to true will invert width to height and height to width.
# * <tt>:margin</tt> - Specifies margins non-printable area. It can be one Numeric for all margins or Array [top,right,bottom,left] margins.
# * <tt>:duplex</tt> - Specifies two faces(for print)
# * <tt>:tumble</tt> - Specifies kind of duplex
#
#
def initialize(paper = :A4, options = {})
@options = DEFAULT_OPTIONS.merge(options)
@landscape = @options[:landscape] || false
@paper = paper
end
def ps
d = format_duplex
p = format_paper[:rg]
m = format_margin
lib = RGhost::Load.library :paper
d << p << m << lib.ps
end
def gs_paper # :nodoc:
fp = format_paper
p = fp[:gs]
# ["-dDEVICEWIDTHPOINTS=#{p[0]}", "-dDEVICEHEIGHTPOINTS=#{p[1]}"]
if fp[:done]
["-dDEVICEWIDTHPOINTS=#{p[0]}", "-dDEVICEHEIGHTPOINTS=#{p[1]}"]
else
["-dDEVICEWIDTHPOINTS=#{to_pt(p[0])}", "-dDEVICEHEIGHTPOINTS=#{to_pt(p[1])}"]
end
end
private
def to_pt(value)
case RGhost::Config::GS[:unit].new
when RGhost::Units::Cm then (value.to_f * 72 / 2.545).to_i
when RGhost::Units::Inch then (value.to_f * 72).to_i
else
value
end
end
def format_margin
# if @options[:margin]
# mt=mr=mb=ml=RGhost::Units::parse(@options[:margin])
# else
# mt=RGhost::Units::parse(@options[:margin_top])
# mr=RGhost::Units::parse(@options[:margin_right])
# mb=RGhost::Units::parse(@options[:margin_bottom])
# ml=RGhost::Units::parse(@options[:margin_left])
# end
case @options[:margin]
when Numeric then mt = mr = mb = ml = RGhost::Units.parse(@options[:margin])
when Array
mt = RGhost::Units.parse(@options[:margin][0] || DEFAULT_OPTIONS[:margin_top])
mr = RGhost::Units.parse(@options[:margin][1] || DEFAULT_OPTIONS[:margin_right])
mb = RGhost::Units.parse(@options[:margin][2] || DEFAULT_OPTIONS[:margin_bottom])
ml = RGhost::Units.parse(@options[:margin][3] || DEFAULT_OPTIONS[:margin_left])
when Hash, NilClass
mt = RGhost::Units.parse(@options[:margin_top] || DEFAULT_OPTIONS[:margin_top])
mr = RGhost::Units.parse(@options[:margin_right] || DEFAULT_OPTIONS[:margin_right])
mb = RGhost::Units.parse(@options[:margin_bottom] || DEFAULT_OPTIONS[:margin_bottom])
ml = RGhost::Units.parse(@options[:margin_left] || DEFAULT_OPTIONS[:margin_left])
end
"/margin 3 dict def margin begin /top #{mt} def /right #{mr} def /bottom #{mb} def /left #{ml} def end\n"
end
def format_paper
case @paper
when Symbol
p = RGhost::Constants::Papers::STANDARD[@paper.to_s.downcase.to_sym]
p.reverse! if @landscape
{rg: "/pagesize #{to_array(p)} def\n", gs: p, done: true}
when Array
@paper.reverse! if @landscape
{rg: "/pagesize #{to_array(@paper.map { |v| to_pt(v) })} def\n", gs: @paper, done: false}
end
end
def format_duplex
"\n<< /Duplex #{@options[:duplex]} /Tumble #{@options[:tumble]} >> setpagedevice\n"
end
end
# puts Paper.new(:A4, :landscape => true, :duplex => true, :margin=> [2,3,4,5])
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