ActionDispatch::Routing::Mapper::Scoping

     # File lib/action_dispatch/routing/mapper.rb, line 376
376:         def constraints(constraints = {})
377:           scope(:constraints => constraints) { yield }
378:         end

     # File lib/action_dispatch/routing/mapper.rb, line 364
364:         def controller(controller, options={})
365:           options[:controller] = controller
366:           scope(options) { yield }
367:         end

     # File lib/action_dispatch/routing/mapper.rb, line 380
380:         def defaults(defaults = {})
381:           scope(:defaults => defaults) { yield }
382:         end

     # File lib/action_dispatch/routing/mapper.rb, line 369
369:         def namespace(path, options = {})
370:           path = path.to_s
371:           options = { :path => path, :as => path, :module => path,
372:                       :shallow_path => path, :shallow_prefix => path }.merge!(options)
373:           scope(options) { yield }
374:         end

     # File lib/action_dispatch/routing/mapper.rb, line 323
323:         def scope(*args)
324:           options = args.extract_options!
325:           options = options.dup
326: 
327:           if name_prefix = options.delete(:name_prefix)
328:             options[:as] ||= name_prefix
329:             ActiveSupport::Deprecation.warn ":name_prefix was deprecated in the new router syntax. Use :as instead.", caller
330:           end
331: 
332:           options[:path] = args.first if args.first.is_a?(String)
333:           recover = {}
334: 
335:           options[:constraints] ||= {}
336:           unless options[:constraints].is_a?(Hash)
337:             block, options[:constraints] = options[:constraints], {}
338:           end
339: 
340:           scope_options.each do |option|
341:             if value = options.delete(option)
342:               recover[option] = @scope[option]
343:               @scope[option]  = send("merge_#{option}_scope", @scope[option], value)
344:             end
345:           end
346: 
347:           recover[:block] = @scope[:blocks]
348:           @scope[:blocks] = merge_blocks_scope(@scope[:blocks], block)
349: 
350:           recover[:options] = @scope[:options]
351:           @scope[:options]  = merge_options_scope(@scope[:options], options)
352: 
353:           yield
354:           self
355:         ensure
356:           scope_options.each do |option|
357:             @scope[option] = recover[option] if recover.has_key?(option)
358:           end
359: 
360:           @scope[:options] = recover[:options]
361:           @scope[:blocks]  = recover[:block]
362:         end

     # File lib/action_dispatch/routing/mapper.rb, line 397
397:           def merge_as_scope(parent, child)
398:             parent ? "#{parent}_#{child}" : child
399:           end

     # File lib/action_dispatch/routing/mapper.rb, line 425
425:           def merge_blocks_scope(parent, child)
426:             merged = parent ? parent.dup : []
427:             merged << child if child
428:             merged
429:           end

     # File lib/action_dispatch/routing/mapper.rb, line 417
417:           def merge_constraints_scope(parent, child)
418:             merge_options_scope(parent, child)
419:           end

     # File lib/action_dispatch/routing/mapper.rb, line 409
409:           def merge_controller_scope(parent, child)
410:             child
411:           end

     # File lib/action_dispatch/routing/mapper.rb, line 421
421:           def merge_defaults_scope(parent, child)
422:             merge_options_scope(parent, child)
423:           end

     # File lib/action_dispatch/routing/mapper.rb, line 405
405:           def merge_module_scope(parent, child)
406:             parent ? "#{parent}/#{child}" : child
407:           end

     # File lib/action_dispatch/routing/mapper.rb, line 431
431:           def merge_options_scope(parent, child)
432:             (parent || {}).except(*override_keys(child)).merge(child)
433:           end

     # File lib/action_dispatch/routing/mapper.rb, line 413
413:           def merge_path_names_scope(parent, child)
414:             merge_options_scope(parent, child)
415:           end

     # File lib/action_dispatch/routing/mapper.rb, line 389
389:           def merge_path_scope(parent, child)
390:             Mapper.normalize_path("#{parent}/#{child}")
391:           end

     # File lib/action_dispatch/routing/mapper.rb, line 393
393:           def merge_shallow_path_scope(parent, child)
394:             Mapper.normalize_path("#{parent}/#{child}")
395:           end

     # File lib/action_dispatch/routing/mapper.rb, line 401
401:           def merge_shallow_prefix_scope(parent, child)
402:             parent ? "#{parent}_#{child}" : child
403:           end

     # File lib/action_dispatch/routing/mapper.rb, line 435
435:           def merge_shallow_scope(parent, child)
436:             child ? true : false
437:           end

     # File lib/action_dispatch/routing/mapper.rb, line 439
439:           def override_keys(child)
440:             child.key?(:only) || child.key?(:except) ? [:only, :except] : []
441:           end

     # File lib/action_dispatch/routing/mapper.rb, line 385
385:           def scope_options
386:             @scope_options ||= private_methods.grep(/^merge_(.+)_scope$/) { $1.to_sym }
387:           end