Class: Vapir::IE::FileField

Inherits:
InputElement show all
Includes:
FileField
Defined in:
lib/vapir-ie/input_elements.rb

Overview

For fields that accept file uploads Windows dialog is opened and handled by WinWindow (see scripts/select_file.rb), launched in a new process.

Instance Method Summary collapse

Methods inherited from Element

#after?, #assert_enabled, #before?, #click, #click_no_wait, element_object_style, #enabled?, #fire_event, #fire_event_no_wait, #scroll_offset, #text_after_begin, #text_after_end, #text_before_begin, #text_before_end, #wait

Methods included from Container

#handling_existence_failure, #log

Instance Method Details

#set(file_path) ⇒ Object

set the file location in the Choose file dialog



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# File 'lib/vapir-ie/input_elements.rb', line 104

def set(file_path)
  assert_exists do
    # it would be nice to do a click_no_wait and then enter the select file dialog information
    # in the same thread, but that won't work here, because #click_no_wait runs in a javascript 
    # setTimeout, and javascript calling to a file input's .click() method doesn't work. it appears 
    # to work until you submit the form, at which point it says access is denied. so, the click has 
    # to be done via WIN32OLE, but it doesn't return until the file field is set, so we need two
    # ruby processes (since WIN32OLE blocking blocks all ruby threads).
    # since locating this element is a much more complicated task than locating the enabled_popup
    # of this browser, this process will handle the former, and we'll spawn another to do the
    # latter.
    require 'win32/process'
    Vapir.require_winwindow
    rubyw_exe= File.join(Config::CONFIG['bindir'], 'rubyw')
    error_file_name=File.expand_path(File.join(File.dirname(__FILE__), 'scripts', 'select_file_error_status.marshal_dump'))
    select_file_script=File.expand_path(File.join(File.dirname(__FILE__), 'scripts', 'select_file.rb'))
    command_line=rubyw_exe+[select_file_script, browser.hwnd.to_s, file_path, error_file_name].map{|arg| " \"#{arg.gsub("/", "\\")}\""}.join('')
     # TODO/FIX: the above method of escaping seems to have issues with trailing slashes. 
    select_file_process=::Process.create('command_line' => command_line)
    
    click
    
    if ::Waiter.try_for(2, :exception => nil) { File.exists?(error_file_name) } # wait around a moment for the script to finish writing - #click returns before that script exits 
      marshaled_error=File.read(error_file_name)
      error=Marshal.load(marshaled_error)
      error[:backtrace]+= caller(0)
      File.delete(error_file_name)
      raise error[:class], error[:message], error[:backtrace]
    end
    return file_path
    # TODO/FIX: figure out what events ought to be fired here - onchange, maybe others
  end
end