path: root/code/runcontext.rb

class RunContext
	# mode is a number from 0 to infinity
	#
	# flags are a string or array containing:
	# * a = run all
	# * d or e = detach
	# * t = run in a terminal
	# * w = wait for <enter> after execution
	# * c = run from ./ranger.rb <filename> (not usable from inside ranger)
	# * capital letter inverts
	## accessors {{{
	attr_accessor( *%w[
		all detach wait new_term console
		files handlers paths
		mode
		exec
		multi
	])
	attr_reader( :flags )
	def flags=(x)
		assert x, Array, String

		if x.is_a? Array
			@flagstring = x.join('')
			@flags = x
		elsif x.is_a? String
			@flagstring = x
			@flags = x.split(//)
		end

		parse_flags
		return x
	end
	## }}}

	def initialize(files, mode=nil, flags=nil, preferred_app=nil)
		@mode = mode.to_i
		if files.is_a? Array
			@files = files.dup
		else
			@files = [files.dup]
		end
		self.flags = flags || ''

		if @flags.include?( "A" ) and ( cf = Fm.currentfile ).is_a? Directory::Entry
			@files = [cf]
		end
		
		@files.reject! {|file|
			file.handler == nil or !file.exists?
		}
		@handlers = @files.map {|file| file.handler}
		@paths = @files.map {|file| file.path}

		if preferred_app
			@handler = preferred_app
		else
			@handler = @handlers.first
			self.base_flags = @files.first.baseflags
		end

		@multi = (@files.size > 1 and @handlers.uniq.size == 1)

		if @handler
			@exec = Application.send(@handler, self)
		else
			@exec = nil
		end
	end

	def has_flag? x
		if x.is_a? Regexp
			@flagstring =~ x
		elsif x.is_a? String
			@flags.include? x
		else
			false
		end
	end

	def parse_flags
		@all = @detach = @new_term = @wait = false

		## Positive flags
		if has_flag? 'a'
			@all = true
		end
		if has_flag? /[de]/
			@detach = true
		end
		if has_flag? 't'
			@new_term = true
			@detach = true
		end
		if has_flag? 'w'
			@wait = true
		end
		if has_flag? 'c'
			@console = true
		end

		## Negative flags
		if has_flag? 'A'
			@all = false
		end
		if has_flag? /[DE]/
			@detach = false
		end
		if has_flag? 'T'
			@new_term = false
		end
		if has_flag? 'W'
			@wait = false
		end
		if has_flag? 'C'
			@console = false
		end
	end

	def no_mode?()
		@mode == 0
	end

	def no_flags?()
		@flagstring.empty?
	end

	def default_flags=(x)
		if @flagstring.empty?
			self.flags = x
		end
		return x
	end

	def dont_run_in_background
		if @detach and !@new_term
			self.flags += ['D']
		end
	end

	def base_flags=(x)
		newflags = (x.is_a? Array) ? x : x.split(//)

		for flag in newflags
			unless @flags.include? flag.upcase or
					@flags.include? flag.downcase
				@flags << flag
			end
		end

		self.flags = @flags
		return x
	end

	## set the mode and return self.
	def with_mode(n)
		@mode = n
		self
	end

	## wrapper {{{

	## escape all files for direct use in the shell.
	## if the _multi_ attribute is true, this is a shortcut for
	##   rc.paths.map {|x| ~x}.join(' ')
	## otherwise:
	##   ~(rc.paths.first)
	def ~
		if @multi
			@paths.map {|x| ~x}.join(' ')
		else
			~@paths.first
		end
	end
	alias to_s ~

	## escape one (the first) file for direct use in the shell.
	## this is a shortcut for:
	##   ~(rc.paths.first)
	def one
		~@paths.first
	end

	## shortcut for _files.size_
	def size() @files.size end

	## shortcut for _files.first.path_
	def first() @files.first end

	## shortcut for _files.first.name_
	def name() @files.first.name end

	## }}}
end