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Contents
# Author:: Eric Crane (mailto:eric.crane@mac.com)
# Copyright:: Copyright (c) 2020 Eric Crane. All rights reserved.
#
# Move an object to a new parent.
#
module Gloo
module Verbs
class Move < Gloo::Core::Verb
KEYWORD = 'move'.freeze
KEYWORD_SHORT = 'mv'.freeze
TO = 'to'.freeze
MISSING_SRC_ERR = 'Object to move was not specified!'.freeze
MISSING_SRC_OBJ_ERR = 'Could not find object to move: '.freeze
MISSING_DST_ERR = "Move' must include 'to' parent object!".freeze
MISSING_DST_OBJ_ERR = 'Could not resolve target: '.freeze
#
# Run the verb.
#
def run
dst = lookup_dst
return if dst.nil?
o = lookup_obj
return unless o
o.parent.remove_child o
dst.add_child o
end
#
# Get the Verb's keyword.
#
def self.keyword
return KEYWORD
end
#
# Get the Verb's keyword shortcut.
#
def self.keyword_shortcut
return KEYWORD_SHORT
end
# ---------------------------------------------------------------------
# Private functions
# ---------------------------------------------------------------------
private
#
# Lookup the object that we're moving.
#
def lookup_obj
arr = @tokens.before_token( TO )
if arr.count == 1
@engine.err MISSING_SRC_ERR
return
end
name = arr[ 1 ]
pn = Gloo::Core::Pn.new( @engine, name )
o = pn.resolve
@engine.err( "#{MISSING_SRC_OBJ_ERR} #{name}" ) unless o
return o
end
#
# Lookup destination, the new parent object.
#
def lookup_dst
dst = @tokens.after_token( TO )
unless dst
@engine.err MISSING_DST_ERR
return nil
end
pn = Gloo::Core::Pn.new( @engine, dst )
o = pn.resolve
@engine.err( "#{MISSING_DST_OBJ_ERR} '#{dst}'" ) unless o
return o
end
end
end
end
Version data entries
20 entries across 20 versions & 1 rubygems