Module: Condenser::ParseHelpers

Included in:
CSSMediaCombinerProcessor, JSAnalyzer, SVGTransformer::Template
Defined in:
lib/condenser/helpers/parse_helpers.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#matched ⇒ Object

Returns the value of attribute matched.



5
6
7
 
# File 'lib/condenser/helpers/parse_helpers.rb', line 5

def matched
  @matched
end

Instance Method Details

#current_line ⇒ Object 



47
48
49
50
51
 
# File 'lib/condenser/helpers/parse_helpers.rb', line 47

def current_line
  start = (@source.rindex(/(\n|\z)/, @old_index) || 0) + 1
  uptop = @source.index(/(\n|\z)/, @index) || (@old_index + @matched.length)
  @source[start..uptop]
end

#cursor ⇒ Object 



53
54
55
56
57
58
 
# File 'lib/condenser/helpers/parse_helpers.rb', line 53

def cursor
  start = (@source.rindex("\n", @old_index) || 0) + 1
  uptop = @source.index("\n", @index) || (@old_index + @matched.length)
  lineno = @source[0..start].count("\n") + 1
  "#{lineno.to_s.rjust(4)}: " + @source[start..uptop] + "\n      #{'-'* (@index-1-start)}#{'^'*(@matched.length)}"
end

#eos? ⇒ Boolean

Returns:

  • (Boolean) 


7
8
9
 
# File 'lib/condenser/helpers/parse_helpers.rb', line 7

def eos?
  @index >= @source.size
end

#forward(by = 1) ⇒ Object 



32
33
34
 
# File 'lib/condenser/helpers/parse_helpers.rb', line 32

def forward(by=1)
  @index += by
end

#gobble(r) ⇒ Object 



60
61
62
63
64
65
66
67
68
69
70
 
# File 'lib/condenser/helpers/parse_helpers.rb', line 60

def gobble(r)
  if r.is_a?(Regexp)
    m = @source.match(r, @index)
    if m&.begin(0) == @index
      scan_until(r)
    end
  else
    forward(1)
    @source[@index-1];
  end
end

#next_word ⇒ Object 



42
43
44
45
 
# File 'lib/condenser/helpers/parse_helpers.rb', line 42

def next_word
  nw = @source.match(/\s*(\S+)/, @index)
  nw.nil? ? nil : nw[1]
end

#peek(n = 1) ⇒ Object 



72
73
74
75
76
77
78
 
# File 'lib/condenser/helpers/parse_helpers.rb', line 72

def peek(n=1)
  if n.is_a?(Regexp)
    @source.match(n, @index)
  else
    @source.slice(@index, n)
  end
end

#pre_match ⇒ Object 



24
25
26
 
# File 'lib/condenser/helpers/parse_helpers.rb', line 24

def pre_match
  @source[@old_index...(@index-@matched.size)]
end

#rewind(by = 1) ⇒ Object 



28
29
30
 
# File 'lib/condenser/helpers/parse_helpers.rb', line 28

def rewind(by=1)
  @index -= by
end

#scan_until(r) ⇒ Object 



11
12
13
14
15
16
17
18
19
20
21
22
 
# File 'lib/condenser/helpers/parse_helpers.rb', line 11

def scan_until(r)
  index = @source.index(r, @index)
  match = @source.match(r, @index)
  if match
    @matched = match.to_s
    @old_index = @index
    @index = index + @matched.size
  else
    @matched = nil
  end
  match
end

#seek(pos) ⇒ Object 



36
37
38
39
40
 
# File 'lib/condenser/helpers/parse_helpers.rb', line 36

def seek(pos)
  @old_index = nil
  @matched = nil
  @index = pos
end