Class: Johnson::Runtime

Inherits:
Object show all
Defined in:
lib/rhack/js/johnson.rb,
lib/rhack.rb

Overview

JavaScript interface DOM emulation ###

Constant Summary collapse

BROWSER_PATH = 
File.expand_path "../browser", __FILE__
L = 
RHACK::L

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#thread_id ⇒ Object

Returns the value of attribute thread_id.



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# File 'lib/rhack/js/johnson.rb', line 17

def thread_id
  @thread_id
end

Class Method Details

.new_browser(jq = false) ⇒ Object 



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# File 'lib/rhack/js/johnson.rb', line 53

def new_browser(jq=false)
  rt = new
  %w{xmlw3cdom_1 xmlw3cdom_2 xmlsax env}.concat(jq ? ['jquery'] : []).each {|f|
    path = "#{BROWSER_PATH}/#{f}.js"
    rt.evaluate IO.read(path), path, 1 
  }
  rt.document = ''
  rt
end

.runtime_set?(opts) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rhack/js/johnson.rb', line 22

def runtime_set?(opts)
  !opts[:eval].b or (@@browser and @@browser.thread_id == Curl.carier_thread.object_id)
end

.set_browser_for_curl(opts) ⇒ Object

CarierThread breaks if Multi has no work && CarierThread is joined so itwon’t last forever.

Johnson is not thread safe => Runtime created in this thread will become unusable after CarierThread dies.

So we don’t use Curl.wait until Carier haven’t got whole request for this Runtime.



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# File 'lib/rhack/js/johnson.rb', line 35

def set_browser_for_curl(opts)
  unless runtime_set? opts
    if Curl.status
      Curl.recall
      Curl.debug 'recalled'
    end
    if opts[:thread_safe].b
      @@browser = new_browser(opts[:jq])
      L.debug "#@@browser initialized in #{Thread.current}\nmain: #{Thread.main}; carier: #{Curl.carier_thread}"
    else
      L.debug 'about to run carier'
      Curl.execute {@@browser = new_browser(opts[:jq])
                         L.debug "#@@browser initialized in #{Thread.current}\nmain: #{Thread.main}; carier: #{Curl.carier_thread}"}
      sleep 0.01 until runtime_set? opts
    end
  end
end

Instance Method Details

#document=(html) ⇒ Object 



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# File 'lib/rhack/js/johnson.rb', line 65

def document=(html)
  evaluate "var document = new DOMDocument(#{html.to_doc.to_xhtml.inspect})"
end