Class: Imaginator::LaTeX

Inherits:
Object
  • Object
show all
Defined in:
lib/imaginator.rb

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ LaTeX

Returns a new instance of LaTeX.



12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
# File 'lib/imaginator.rb', line 12

def initialize(opts = {})
  @opts = {
    :convert_opts => '-trim -density 120',
    :format          => 'png',
    :debug           => false
  }
  @opts[:blacklist] = %w{
    include def command loop repeat open toks output input
    catcode name \\every \\errhelp \\errorstopmode \\scrollmode
    \\nonstopmode \\batchmode \\read \\write csname \\newhelp
    \\uppercase \\lowercase \\relax \\aftergroup \\afterassignment
    \\expandafter \\noexpand \\special $$
  }
  @opts.update(opts)
end

Instance Method Details

#format ⇒ Object 



28
29
30
 
# File 'lib/imaginator.rb', line 28

def format
  @opts[:format]
end

#process(code) ⇒ Object 



45
46
47
48
49
 
# File 'lib/imaginator.rb', line 45

def process(code)
  errors = @opts[:blacklist].select { |cmd| code.include?(cmd) }
  errors.empty? || raise(ArgumentError.new("Invalid LaTeX commands #{errors.join(', ')}"))
  code.strip
end

#render(code, file) ⇒ Object 



32
33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/imaginator.rb', line 32

def render(code, file)
  begin
    temp_dir = create_temp_dir(file)
    latex2dvi(temp_dir, code)
    dvi2ps(temp_dir)
    ps2image(temp_dir, file)
  rescue
    FileUtils.rm_rf(temp_dir) if !@opts[:debug]
  else
    FileUtils.rm_rf(temp_dir)
  end
end