Class: Html

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

Constant Summary collapse

INDENT = 
'  '
VOID_TAGS = 
%w{area base br col command embed hr img input keygen link meta param source track wbr}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(content = '', indent = 0, &b) ⇒ Html 



7
8
9
10
11
 
# File 'lib/rhtml.rb', line 7

def initialize(content='', indent=0, &b)
  @indent = 0
  @content = content
  @content << instance_eval(&b) if block_given?
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(tag_name, ps = {}, str = nil, &b) ⇒ Object 



13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
 
# File 'lib/rhtml.rb', line 13

def method_missing(tag_name, ps={}, str=nil,  &b)

  if ps.is_a? String
    str, ps = ps, {}
  end

  tag_name = tag_name.to_s
  if VOID_TAGS.include? tag_name
    content << void_tag(tag_name, ps)
  else
    content << tag_open(tag_name, ps)
    @indent += 1
    if str
      content << str << "\n"
    elsif block_given?
      ret = instance_eval &b
      content << ret.to_s << "\n" unless ret.is_a?(self.class)
    end
    @indent -= 1
    self.content << tag_close(tag_name)
  end

  self
end

Instance Attribute Details

#content ⇒ Object

Returns the value of attribute content.



2
3
4
 
# File 'lib/rhtml.rb', line 2

def content
  @content
end

#indent ⇒ Object

Returns the value of attribute indent.



2
3
4
 
# File 'lib/rhtml.rb', line 2

def indent
  @indent
end

Instance Method Details

#p(ps = {}, &b) ⇒ Object

conflict with global p method



39
40
41
 
# File 'lib/rhtml.rb', line 39

def p(ps={}, &b)
  method_missing("p", ps, &b)
end

#properties(ps) ⇒ Object 



43
44
45
 
# File 'lib/rhtml.rb', line 43

def properties ps
  ps.map { |p| "#{p[0].to_s.gsub("_", "-")}='#{p[1].to_s}'" }.join(' ')
end

#tag_close(tag_name) ⇒ Object 



55
56
57
 
# File 'lib/rhtml.rb', line 55

def tag_close tag_name
  "#{INDENT * indent}</#{tag_name}>\n"
end

#tag_open(tag_name, ps = {}) ⇒ Object 



47
48
49
50
51
52
53
 
# File 'lib/rhtml.rb', line 47

def tag_open tag_name, ps={}
  if ps.empty?
    "#{INDENT * indent}<#{tag_name}>\n"
  else
    "#{INDENT * indent}<#{tag_name} #{properties ps}>\n"
  end
end

#to_s ⇒ Object 



63
64
65
 
# File 'lib/rhtml.rb', line 63

def to_s
  content
end

#void_tag(tag_name, ps = {}) ⇒ Object 



59
60
61
 
# File 'lib/rhtml.rb', line 59

def void_tag tag_name, ps={}
  "#{INDENT * indent}<#{tag_name} #{properties ps}/>\n"
end