class Erubi::CaptureEndEngine

An engine class that supports capturing blocks via the <%|= and <%|== tags, explicitly ending the captures using <%| end %> blocks.

Public Class Methods

new(input, properties={}) click to toggle source

Initializes the engine. Accepts the same arguments as ::Erubi::Engine, and these additional options:

:escape_capture

Whether to make <%|= escape by default, and <%|== not escape by default, defaults to the same value as :escape.

Calls superclass method Erubi::Engine.new
# File lib/erubi/capture_end.rb, line 12
def initialize(input, properties={})
  properties = Hash[properties]
  escape = properties.fetch(:escape){properties.fetch(:escape_html, false)}
  @escape_capture = properties.fetch(:escape_capture, escape)
  @bufval = properties[:bufval] ||= 'String.new'
  @bufstack = '__erubi_stack'
  properties[:regexp] ||= /<%(\|?={1,2}|-|\#|%|\|)?(.*?)([-=])?%>([ \t]*\r?\n)?/m
  super
end

Private Instance Methods

handle(indicator, code, tailch, rspace, lspace) click to toggle source

Handle the <%|= and <%|== tags

Calls superclass method Erubi::Engine#handle
# File lib/erubi/capture_end.rb, line 25
def handle(indicator, code, tailch, rspace, lspace)
  case indicator
  when '|=', '|=='
    rspace = nil if tailch && !tailch.empty?
    add_text(lspace) if lspace
    escape_capture = ((indicator == '|=') ^ @escape_capture)
    src << "begin; (#{@bufstack} ||= []) << #{@bufvar}; #{@bufvar} = #{@bufval}; #{@bufstack}.last << #{@escapefunc if escape_capture}((" << code
    add_text(rspace) if rspace
  when '|'
    rspace = nil if tailch && !tailch.empty?
    add_text(lspace) if lspace
    src << code << ")).to_s; ensure; #{@bufvar} = #{@bufstack}.pop; end;"
    add_text(rspace) if rspace
  else
    super
  end
end