class Ruby2Js
Constants
- ASSIGN_NODES
Nodes that represent assignment and probably need () around them.
TODO: this should be replaced with full precedence support :/
- BINARY
- LINE_LENGTH
- VERSION
Public Class Methods
new()
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Calls superclass method
# File lib/goling/translators/javascript.rb, line 30 def initialize super @indent = " " self.auto_shift_type = true self.strict = true self.expected = String @calls = [] # self.debug[:defn] = /zsuper/ end
Public Instance Methods
cond_loop(exp, name)
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# File lib/goling/translators/javascript.rb, line 55 def cond_loop(exp, name) cond = process(exp.shift) body = process(exp.shift) head_controlled = exp.shift body = indent(body).chomp if body code = [] if head_controlled then code << "#{name}(#{cond}){" code << body if body code << "}" else code << "begin" code << body if body code << "end #{name} #{cond}" end code.join("\n") end
indent(s)
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# File lib/goling/translators/javascript.rb, line 51 def indent(s) s.to_s.split(/\n/).map{|line| @indent + line}.join("\n") end
parenthesize(exp)
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# File lib/goling/translators/javascript.rb, line 42 def parenthesize exp case self.context[1] when nil, :scope, :if, :iter, :resbody, :when, :while, :until then exp else "(#{exp})" end end
process_and(exp)
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# File lib/goling/translators/javascript.rb, line 75 def process_and(exp) parenthesize "#{process exp.shift} and #{process exp.shift}" end
process_arglist(exp)
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# File lib/goling/translators/javascript.rb, line 79 def process_arglist(exp) # custom made node code = [] until exp.empty? do code << process(exp.shift) end code.join ', ' end
process_args(exp)
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# File lib/goling/translators/javascript.rb, line 87 def process_args(exp) args = [] until exp.empty? do arg = exp.shift case arg when Symbol then args << arg when Array then case arg.first when :block then asgns = {} arg[1..-1].each do |lasgn| asgns[lasgn[1]] = process(lasgn) end args.each_with_index do |name, index| args[index] = asgns[name] if asgns.has_key? name end else raise "unknown arg type #{arg.first.inspect}" end else raise "unknown arg type #{arg.inspect}" end end return "(#{args.join ', '})" end
process_array(exp)
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# File lib/goling/translators/javascript.rb, line 117 def process_array(exp) "[#{process_arglist(exp)}]" end
process_attrasgn(exp)
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# File lib/goling/translators/javascript.rb, line 121 def process_attrasgn(exp) receiver = process exp.shift name = exp.shift args = exp.empty? ? nil : exp.shift case name when :[]= then rhs = process args.pop "#{receiver}[#{process(args)}] = #{rhs}" else name = name.to_s.sub(/=$/, '') if args && args != s(:arglist) then "#{receiver}.#{name} = #{process(args)}" end end end
process_block(exp)
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# File lib/goling/translators/javascript.rb, line 138 def process_block(exp) result = [] exp << nil if exp.empty? until exp.empty? do code = exp.shift if code.nil? or code.first == :nil then result << "# do nothing\n" else result << process(code) end end result = parenthesize result.join ";\n" result += ";\n" unless result.start_with? "(" return result end
process_break(exp)
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# File lib/goling/translators/javascript.rb, line 157 def process_break(exp) val = exp.empty? ? nil : process(exp.shift) # HACK "break" + (val ? " #{val}" : "") if val then "break #{val}" else "break" end end
process_call(exp)
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# File lib/goling/translators/javascript.rb, line 167 def process_call(exp) str = exp.inspect receiver_node_type = exp.first.nil? ? nil : exp.first.first receiver = process exp.shift receiver = "(#{receiver})" if ASSIGN_NODES.include? receiver_node_type name = exp.shift args = [] raw = [] # this allows us to do both old and new sexp forms: exp.push(*exp.pop[1..-1]) if exp.size == 1 && exp.first.first == :arglist @calls.push name in_context :arglist do until exp.empty? do arg_type = exp.first.sexp_type e = exp.shift raw << e.dup arg = process e next if arg.empty? strip_hash = (arg_type == :hash and not BINARY.include? name and (exp.empty? or exp.first.sexp_type == :splat)) wrap_arg = Ruby2Ruby::ASSIGN_NODES.include? arg_type arg = arg[2..-3] if strip_hash arg = "(#{arg})" if wrap_arg args << arg end end #str+ case name when *BINARY then "(#{receiver} #{name} #{args.join(', ')})" when :[] then receiver ||= "self" if raw.size == 1 && raw.first.sexp_type == :lit && raw.first.to_a[1].kind_of?(Symbol) "#{receiver}.#{args.first[1..-1]}" else "#{receiver}[#{args.join(', ')}]" end when :[]= then receiver ||= "self" rhs = args.pop "#{receiver}[#{args.join(', ')}] = #{rhs}" when :"-@" then "-#{receiver}" when :"+@" then "+#{receiver}" when :new args = nil if args.empty? args = "(#{args.join(',')})" if args receiver = "#{receiver}" if receiver "#{name} #{receiver}#{args}" when :lambda receiver = "#{receiver}." if receiver "#{receiver}function" else args = nil if args.empty? args = "#{args.join(',')}" if args receiver = "#{receiver}." if receiver "#{receiver}#{name}(#{args})" end ensure @calls.pop end
process_const(exp)
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# File lib/goling/translators/javascript.rb, line 242 def process_const(exp) exp.shift.to_s end
process_defn(exp)
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# File lib/goling/translators/javascript.rb, line 246 def process_defn(exp) type1 = exp[1].first type2 = exp[2].first rescue nil if type1 == :args and [:ivar, :attrset].include? type2 then name = exp.shift case type2 when :ivar then exp.clear return "attr_reader #{name.inspect}" when :attrset then exp.clear return "attr_writer :#{name.to_s[0..-2]}" else raise "Unknown defn type: #{exp.inspect}" end end case type1 when :scope, :args then name = exp.shift args = process(exp.shift) args = "" if args == "()" body = [] until exp.empty? do body << indent(process(exp.shift)) end body = body.join("\n") return "#{exp.comments}#{name}#{args}{\n#{body}\n}".gsub(/\n\s*\n+/, "\n") else raise "Unknown defn type: #{type1} for #{exp.inspect}" end end
process_hash(exp)
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# File lib/goling/translators/javascript.rb, line 280 def process_hash(exp) result = [] until exp.empty? e = exp.shift if e.sexp_type == :lit lhs = process(e) rhs = exp.shift t = rhs.first rhs = process rhs rhs = "(#{rhs})" unless [:lit, :str, :array, :iter].include? t # TODO: verify better! result << "\n#{lhs[1..-1]}: #{rhs}" else lhs = process(e) rhs = exp.shift t = rhs.first rhs = process rhs rhs = "(#{rhs})" unless [:lit, :str].include? t # TODO: verify better! result << "\n#{lhs}: #{rhs}" end end return "{ #{indent(result.join(', '))} }" end
process_iasgn(exp)
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# File lib/goling/translators/javascript.rb, line 307 def process_iasgn(exp) lhs = exp.shift if exp.empty? then # part of an masgn lhs.to_s else if lhs.to_s[0] == '@' "self.#{lhs.to_s[1..-1]} = #{process exp.shift}" else "#{lhs} = #{process exp.shift}" end end end
process_if(exp)
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# File lib/goling/translators/javascript.rb, line 320 def process_if(exp) expand = Ruby2Ruby::ASSIGN_NODES.include? exp.first.first c = process exp.shift t_type = exp.first.sexp_type t = process exp.shift f_type = exp.first.sexp_type if exp.first f = process exp.shift c = "(#{c.chomp})" #if c =~ /\n/ if t then #unless expand then # if f then # r = "#{c} ? (#{t}) : (#{f})" # r = nil if r =~ /return/ # HACK - need contextual awareness or something # else # r = "#{t} if #{c}" # end # return r if r and (@indent+r).size < LINE_LENGTH and r !~ /\n/ #end r = "if#{c}{\n#{indent(t)}#{[:block, :while, :if].include?(t_type) ? '':';'}\n" r << "}else{\n#{indent(f)}#{[:block, :while, :if].include?(f_type) ? '':';'}\n" if f r << "}" r elsif f unless expand then r = "#{f} unless #{c}" return r if (@indent+r).size < LINE_LENGTH and r !~ /\n/ end "unless #{c} then\n#{indent(f)}\nend" else # empty if statement, just do it in case of side effects from condition "if #{c} then\n#{indent '# do nothing'}\nend" end end
process_iter(exp)
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# File lib/goling/translators/javascript.rb, line 358 def process_iter(exp) iter = process exp.shift args = exp.shift args = (args == 0) ? '' : process(args) body = exp.empty? ? nil : process(exp.shift) b, e = #if iter == "END" then [ "{", "}" ] #else # [ "do", "end" ] # end iter.sub!(/\(\)$/, '') result = [] result << "#{iter}(#{args})" result << "#{b}" result << "\n" if body then result << indent(body.strip) result << "\n" end result << e result.join end
process_ivar(exp)
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# File lib/goling/translators/javascript.rb, line 384 def process_ivar(exp) "this.#{exp.shift.to_s[1..-1]}" end
process_lasgn(exp)
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# File lib/goling/translators/javascript.rb, line 388 def process_lasgn(exp) s = "#{exp.shift}" s += " = #{process exp.shift}" unless exp.empty? s end
process_lit(exp)
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# File lib/goling/translators/javascript.rb, line 394 def process_lit(exp) obj = exp.shift case obj when Range then "(#{obj.inspect})" else obj.inspect end end
process_lvar(exp)
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# File lib/goling/translators/javascript.rb, line 404 def process_lvar(exp) exp.shift.to_s end
process_masgn(exp)
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# File lib/goling/translators/javascript.rb, line 408 def process_masgn(exp) lhs = exp.shift rhs = exp.empty? ? nil : exp.shift case lhs.first when :array then lhs.shift lhs = lhs.map do |l| case l.first when :masgn then "(#{process(l)})" else process(l) end end when :lasgn then lhs = [ splat(lhs.last) ] when :splat then lhs = [ :"*" ] else raise "no clue: #{lhs.inspect}" end if context[1] == :iter and rhs then lhs << splat(rhs[1]) rhs = nil end unless rhs.nil? then t = rhs.first rhs = process rhs rhs = rhs[1..-2] if t == :array # FIX: bad? I dunno return "#{lhs.join(", ")} = #{rhs}" else return lhs.join(", ") end end
process_nil(exp)
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# File lib/goling/translators/javascript.rb, line 446 def process_nil(exp) "null" end
process_return(exp)
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# File lib/goling/translators/javascript.rb, line 450 def process_return(exp) if exp.empty? then return "return" else return "return #{process exp.shift}" end end
process_scope(exp)
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# File lib/goling/translators/javascript.rb, line 458 def process_scope(exp) exp.empty? ? "" : process(exp.shift) end
process_true(exp)
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# File lib/goling/translators/javascript.rb, line 462 def process_true(exp) "true" end
process_until(exp)
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# File lib/goling/translators/javascript.rb, line 466 def process_until(exp) cond_loop(exp, 'until') end
process_while(exp)
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# File lib/goling/translators/javascript.rb, line 470 def process_while(exp) cond_loop(exp, 'while') end