Class: Tenjin::Template

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

Overview

template class

ex. file ‘example.rbhtml’

<html>
 <body>
  <h1>${@title}</h1>
  <ul>
  <?rb i = 0 ?>
  <?rb for item in @items ?>
  <?rb   i += 1 ?>
    <li>#{i} : ${item}</li>
  <?rb end ?>
  </ul>
 </body>
</html>

ex. convertion

require 'tenjin'
template = Tenjin::Template.new('example.rbhtml')
print template.script
## or
# template = Tenjin::Template.new()
# print template.convert_file('example.rbhtml')
## or
# template = Tenjin::Template.new()
# fname = 'example.rbhtml'
# print template.convert(File.read(fname), fname)  # filename is optional

ex. evaluation

context = {:title=>'Tenjin Example', :items=>['foo', 'bar', 'baz'] }
output = template.render(context)
## or
# context = Tenjin::Context(:title=>'Tenjin Example', :items=>['foo','bar','baz'])
# output = template.render(context)
## or
# output = template.render(:title=>'Tenjin Example', :items=>['foo','bar','baz'])
print output

Constant Summary collapse

ESCAPE_FUNCTION =

or ‘Eruby::Helper.escape’

'escape'
TRACE = 
false

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(filename = nil, options = {}) ⇒ Template

initializer of Template class.

options:

:escapefunc

function name to escape value (default ‘escape’)

:preamble

preamble such as “_buf = ”” (default nil)

:postamble

postamble such as “_buf.to_s” (default nil)



509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
 
# File 'lib/tenjin.rb', line 509

def initialize(filename=nil, options={})
  if filename.is_a?(Hash)
    options = filename
    filename = nil
  end
  @filename   = filename
  @escapefunc = options[:escapefunc] || ESCAPE_FUNCTION
  @preamble   = options[:preamble]  == true ? "_buf = #{init_buf_expr()}; " : options[:preamble]
  @postamble  = options[:postamble] == true ? finish_buf_expr() : options[:postamble]
  @input      = options[:input]
  @trace      = options[:trace] || TRACE
  @args       = nil  # or array of argument names
  if @input
    convert(@input, filename)
  elsif filename
    convert_file(filename)
  end
end

Instance Attribute Details

#_last_checked_at ⇒ Object

Returns the value of attribute _last_checked_at.



530
531
532
 
# File 'lib/tenjin.rb', line 530

def _last_checked_at
  @_last_checked_at
end

#args ⇒ Object

Returns the value of attribute args.



528
529
530
 
# File 'lib/tenjin.rb', line 528

def args
  @args
end

#escapefunc ⇒ Object

Returns the value of attribute escapefunc.



527
528
529
 
# File 'lib/tenjin.rb', line 527

def escapefunc
  @escapefunc
end

#filename ⇒ Object

Returns the value of attribute filename.



527
528
529
 
# File 'lib/tenjin.rb', line 527

def filename
  @filename
end

#initbuf ⇒ Object

Returns the value of attribute initbuf.



527
528
529
 
# File 'lib/tenjin.rb', line 527

def initbuf
  @initbuf
end

#newline ⇒ Object

Returns the value of attribute newline.



527
528
529
 
# File 'lib/tenjin.rb', line 527

def newline
  @newline
end

#script ⇒ Object

,:bytecode



529
530
531
 
# File 'lib/tenjin.rb', line 529

def script
  @script
end

#timestamp ⇒ Object

Returns the value of attribute timestamp.



528
529
530
 
# File 'lib/tenjin.rb', line 528

def timestamp
  @timestamp
end

Class Method Details

.TRACE=(boolean) ⇒ Object 



496
497
498
499
 
# File 'lib/tenjin.rb', line 496

def self.TRACE=(boolean)
  remove_const :TRACE
  const_set :TRACE, boolean
end

Instance Method Details

#convert(input, filename = nil) ⇒ Object

convert string into ruby code



538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
 
# File 'lib/tenjin.rb', line 538

def convert(input, filename=nil)
  @input = input
  @filename = filename
  @proc = nil
  pos = input.index(?\n)
  if pos && input[pos-1] == ?\r
    @newline = "\r\n"
    @newlinestr = '\\r\\n'
  else
    @newline = "\n"
    @newlinestr = '\\n'
  end
  before_convert()
  parse_stmts(input)
  after_convert()
  return @script
end

#convert_file(filename) ⇒ Object

convert file into ruby code



533
534
535
 
# File 'lib/tenjin.rb', line 533

def convert_file(filename)
  return convert(File.read(filename), filename)
end

#finish_buf_expr ⇒ Object

:nodoc:



772
773
774
 
# File 'lib/tenjin.rb', line 772

def finish_buf_expr()  # :nodoc:
  return "_buf.to_s"
end

#init_buf_expr ⇒ Object

:nodoc:



768
769
770
 
# File 'lib/tenjin.rb', line 768

def init_buf_expr()  # :nodoc:
  return "''"
end

#render(_context = Context.new) ⇒ Object

evaluate converted ruby code and return it. argument ‘_context’ should be a Hash object or Context object.



778
779
780
781
782
783
784
785
786
787
788
789
790
 
# File 'lib/tenjin.rb', line 778

def render(_context=Context.new)
  _context = Context.new(_context) if _context.is_a?(Hash)
  @proc ||= _render()
  if @trace
    s = ""
    s << "<!-- ***** begin: #{@filename} ***** -->\n"
    s << _context.instance_eval(&@proc)
    s << "<!-- ***** end: #{@filename} ***** -->\n"
    return s
  else
    return _context.instance_eval(&@proc)
  end
end