Class: Packcr::Stream

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

Instance Method Summary collapse

Constructor Details

#initialize(io, name, line) ⇒ Stream

Returns a new instance of Stream.



5
6
7
8
9
10
 
# File 'lib/packcr/stream.rb', line 5

def initialize(io, name, line)
  @io = io
  @name = name
  @line = line
  @line_directive_tag = nil
end

Instance Method Details

#get_code_block(code, indent, fname) ⇒ Object 



92
93
94
95
96
97
98
99
 
# File 'lib/packcr/stream.rb', line 92

def get_code_block(code, indent, fname)
  buf = StringIO.new
  line, io, @io, @line = @line, @io, buf, @line && :uuid
  write_code_block(code, indent, fname)
  return buf.string
ensure
  @line, @io = line, io
end

#write(s, rewrite_line_directive: false) ⇒ Object 



12
13
14
15
16
17
18
19
20
21
 
# File 'lib/packcr/stream.rb', line 12

def write(s, rewrite_line_directive: false)
  if rewrite_line_directive && @line_directive_tag && @line.respond_to?(:+)
    s.gsub!(@line_directive_tag) { (@line + $`.count("\n") + 1).to_s }
    @line_directive_tag = nil
  end
  @io.write(s)
  if @line.respond_to?(:+)
    @line += s.count("\n")
  end
end

#write_code_block(code, indent, fname) ⇒ Object 



44
45
46
47
48
49
50
51
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
 
# File 'lib/packcr/stream.rb', line 44

def write_code_block(code, indent, fname)
  text = code.text
  ptr = text.b
  len = code.len
  lineno = code.line
  if len == nil
    return # for safety
  end

  ptr.sub!(/\A\n+/) do
    lineno += $&.length
    ""
  end
  ptr.sub!(/[ \v\f\t\r\n]*\z/, "")

  min_indent_spaces = nil
  ptr.gsub!(/^([ \v\f\t]+)([^ \v\f\t\r\n])/) do
    spaces = $1
    char = $2

    next char if char == "#"

    Packcr.unify_indent_spaces(spaces)

    if !min_indent_spaces || min_indent_spaces.length > spaces.length
      min_indent_spaces = spaces
    end

    spaces + char
  end

  if min_indent_spaces
    indent_spaces = " " * indent
    ptr.gsub!(/^#{min_indent_spaces}( *[^\n#])/) do
      "#{indent_spaces}#{$1}"
    end
  end

  return if ptr.empty?

  write_line_directive(fname, lineno)
  ptr.scan(/^(.+?)[ \v\f\t\r]*$|^\r?\n/) do
    write $1 if $1
    write "\n"
  end
  write_output_line_directive
end

#write_line_directive(fname, lineno) ⇒ Object 



27
28
29
30
31
32
33
34
35
36
37
38
 
# File 'lib/packcr/stream.rb', line 27

def write_line_directive(fname, lineno)
  return unless @line
  if lineno.respond_to?(:+)
    write("#line #{lineno + 1} \"")
  else
    @line_directive_tag ||= "<#{SecureRandom.uuid}>"
    write("#line #{@line_directive_tag} \"")
  end

  write(Packcr.escape_string(fname))
  write("\"\n")
end

#write_output_line_directive ⇒ Object 



40
41
42
 
# File 'lib/packcr/stream.rb', line 40

def write_output_line_directive
  write_line_directive(@name, @line)
end

#write_text(s) ⇒ Object 



23
24
25
 
# File 'lib/packcr/stream.rb', line 23

def write_text(s)
  write s.gsub(/\r\n/, "\n")
end