Class: Imp::UnusedSel

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/objcthin.rb

Instance Method Summary collapse

Instance Method Details

#check_file_type(path) ⇒ Object 



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# File 'lib/objcthin.rb', line 57

def check_file_type(path)
  pathname = Pathname.new(path)
  unless pathname.exist?
    raise "#{path} not exit!"
  end

  cmd = "/usr/bin/file -b #{path}"
  output = `#{cmd}`

  unless output.include?('Mach-O')
    raise 'input file not mach-o file type'
  end
  puts Rainbow('will begin process...').green
  pathname
end

#find_impl_methods(path) ⇒ Object 



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# File 'lib/objcthin.rb', line 73

def find_impl_methods(path)
  apple_protocols = [
      'tableView:canEditRowAtIndexPath:',
      'commitEditingStyle:forRowAtIndexPath:',
      'tableView:viewForHeaderInSection:',
      'tableView:cellForRowAtIndexPath:',
      'tableView:canPerformAction:forRowAtIndexPath:withSender:',
      'tableView:performAction:forRowAtIndexPath:withSender:',
      'tableView:accessoryButtonTappedForRowWithIndexPath:',
      'tableView:willDisplayCell:forRowAtIndexPath:',
      'tableView:commitEditingStyle:forRowAtIndexPath:',
      'tableView:didEndDisplayingCell:forRowAtIndexPath:',
      'tableView:didEndDisplayingHeaderView:forSection:',
      'tableView:heightForFooterInSection:',
      'tableView:shouldHighlightRowAtIndexPath:',
      'tableView:shouldShowMenuForRowAtIndexPath:',
      'tableView:viewForFooterInSection:',
      'tableView:willDisplayHeaderView:forSection:',
      'tableView:willSelectRowAtIndexPath:',
      'willMoveToSuperview:',
      'scrollViewDidEndScrollingAnimation:',
      'scrollViewDidZoom',
      'scrollViewWillEndDragging:withVelocity:targetContentOffset:',
      'searchBarTextDidEndEditing:',
      'searchBar:selectedScopeButtonIndexDidChange:',
      'shouldInvalidateLayoutForBoundsChange:',
      'textFieldShouldReturn:',
      'numberOfSectionsInTableView:',
      'actionSheet:willDismissWithButtonIndex:',
      'gestureRecognizer:shouldReceiveTouch:',
      'gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:',
      'gestureRecognizer:shouldReceiveTouch:',
      'imagePickerController:didFinishPickingMediaWithInfo:',
      'imagePickerControllerDidCancel:',
      'animateTransition:',
      'animationControllerForDismissedController:',
      'animationControllerForPresentedController:presentingController:sourceController:',
      'navigationController:animationControllerForOperation:fromViewController:toViewController:',
      'navigationController:interactionControllerForAnimationController:',
      'alertView:didDismissWithButtonIndex:',
      'URLSession:didBecomeInvalidWithError:',
      'setDownloadTaskDidResumeBlock:',
      'tabBarController:didSelectViewController:',
      'tabBarController:shouldSelectViewController:',
      'applicationDidReceiveMemoryWarning:',
      'application:didRegisterForRemoteNotificationsWithDeviceToken:',
      'application:didFailToRegisterForRemoteNotificationsWithError:',
      'application:didReceiveRemoteNotification:fetchCompletionHandler:',
      'application:didRegisterUserNotificationSettings:',
      'application:performActionForShortcutItem:completionHandler:',
      'application:continueUserActivity:restorationHandler:'].freeze

  # imp -[class sel]

  sub_patten = /[+|-]\[.+\s(.+)\]/
  patten = /\s*imp\s*(#{sub_patten})/
  sel_set_patten = /set[A-Z].*:$/
  sel_get_patten = /is[A-Z].*/

  output = `/usr/bin/otool -oV #{path}`

  imp = {}

  output.each_line do |line|
    patten.match(line) do |m|
      sub = sub_patten.match(m[0]) do |subm|
        class_and_sel = subm[0]
        sel = subm[1]

        next if sel.start_with?('.')
        next if apple_protocols.include?(sel)
        next if sel_set_patten.match?(sel)
        next if sel_get_patten.match?(sel)

        if imp.has_key?(sel)
          imp[sel] << class_and_sel
        else
          imp[sel] = [class_and_sel]
        end
      end
    end
  end

  imp.sort
end

#find_unused_sel(path, prefix) ⇒ Object 



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# File 'lib/objcthin.rb', line 33

def find_unused_sel(path, prefix)
  check_file_type(path)
  all_sels = find_impl_methods(path)
  used_sel = reference_selectors(path)

  unused_sel = []

  all_sels.each do |sel,class_and_sels|
    unless used_sel.include?(sel)
      unused_sel += class_and_sels
    end
  end

  puts Rainbow('below selector is unused:').red
  if prefix
    unused_sel.select! do |classname_selector|
      current_prefix = classname_selector.byteslice(2, prefix.length)
      current_prefix == prefix
    end
  end

  puts unused_sel
end

#reference_selectors(path) ⇒ Object 



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# File 'lib/objcthin.rb', line 159

def reference_selectors(path)
  patten = /__TEXT:__objc_methname:(.+)/
  output = `/usr/bin/otool -v -s __DATA __objc_selrefs #{path}`

  sels = []
  output.each_line do |line|
    patten.match(line) do |m|
      sels << m[1]
    end
  end

  sels
end