Class: Pdf2NookCommand

Inherits:
Clamp::Command
  • Object
show all
Defined in:
bin/pdf2nook

Instance Method Summary collapse

Instance Method Details

#clear_tmp ⇒ Object 



30
31
32
33
34
35
36
37
38
39
 
# File 'bin/pdf2nook', line 30

def clear_tmp
  if Dir.exists?('/tmp/pdf2nook/')
    if Dir.entries('/tmp/pdf2nook/').length > 2
      FileUtils.rm Dir.glob('/tmp/pdf2nook/*.png')
      FileUtils.rm Dir.glob('/tmp/pdf2nook/*.pdf')
    end
  else
    Dir.mkdir('/tmp/pdf2nook/');
  end
end

#execute ⇒ Object 



52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
 
# File 'bin/pdf2nook', line 52

def execute

  clear_tmp

  if OS.x?
    begin
      `gsort --version`
    rescue Errno::ENOENT
      puts 'It looks like you are on OS X and didn\'t install coreutils!'.red
      puts 'Run '.white + 'brew install coreutils'.blue + ' please!'.white
    end
  end

  @degree = (rotate?) ? 90 : 270
  filename = File.basename(path)

  puts "Loading document…".yellow

  pdf = Magick::ImageList.new
  pdf.ping(path)

  pages_count = pdf.scene
  odd_pages_count = pages_count % 10

  puts "#{pages_count+1} pages readed!".yellow

  decade = 0

  progress = ProgressBar.create(
    :title       => "Rendering…",
    :format      => '%t |%b>%i| %p%% done',
    :starting_at => 0,
    :total       => (pages_count / 10) + 1,
    :length      => 60
  )

  (0..pages_count).step(10){|from|

    new_pdf = Magick::ImageList.new()
    decade += 1

    progress.increment

    if(from == pages_count - odd_pages_count)
      to = from + odd_pages_count
    else
      to = from + 10
    end

    pdf = Magick::ImageList.new("#{path}[#{from}-#{to}]") do
      self.density = "167.0x167.0"
      self.background_color = "white"
    end

    pdf.each_with_index{|img, i|
      img.opacity = 0
      img.background_color = "white"

      new_pdf << render_page(img, :top)
      new_pdf << render_page(img, :bottom)
    }

    # replace spaces to avoid xargs problems
    @tmp_filename = filename.gsub(/\s/,'_')

    new_pdf.write("/tmp/pdf2nook/#{@tmp_filename}#{decade}.png") do
      self.quality     = 100
      self.density     = "167.0x167.0"
      self.compression = Magick::NoCompression
      self.colorspace  = Magick::GRAYColorspace
      self.gravity     = Magick::NorthWestGravity
    end

    new_pdf = nil
    pdf     = nil

    GC.start
  }

  puts 'Compiling final document…'.yellow

  sort_command = (OS.x?) ? 'gsort -V' : 'sort -V'

  render = Thread.new do
    if(`convert --version`.include? 'OpenMP')
      system("find /tmp/pdf2nook/ -name '*.png' | #{sort_command} | xargs convert -limit thread 16 -limit memory 2GB -write '/tmp/pdf2nook/#{filename}'")
    else
      system("find /tmp/pdf2nook/ -name '*.png' | #{sort_command} | xargs convert -limit memory 2GB -write '/tmp/pdf2nook/#{filename}'")
    end
  end

  render.join

  FileUtils.copy_file("/tmp/pdf2nook/#{filename}", "#{File.dirname(path)}/nook_#{filename}")

  clear_tmp if cleanup?

  puts "Done! Your book located in #{File.dirname(path)}/nook_#{filename}".green
end

#render_page(img, part) ⇒ Object 



41
42
43
44
45
46
47
48
49
50
 
# File 'bin/pdf2nook', line 41

def render_page(img, part)
  part = (part == :top) ? Magick::NorthWestGravity : Magick::SouthEastGravity

  img.resize_to_fill(img.columns, img.rows / 2, part)
     .rotate(@degree)
     .trim!(true)
     .resize_to_fit(600,750)
     .quantize(Integer(colors_count), Magick::GRAYColorspace)
     .contrast(true)
end