Module: Opal::Nodes::Helpers

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# File 'opal/lib/opal/nodes/helpers.rb', line 96
def conditional_send(recvr)
 # temporary variable that stores method receiver
 receiver_temp = scope.new_temp
 push "#{receiver_temp} = ", recvr
 # execute the sexp only if the receiver isn't nil
 push ", (#{receiver_temp} === nil || #{receiver_temp} == null) ? nil : "
 yield receiver_temp
 wrap '(', ')'
end

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# File 'opal/lib/opal/nodes/helpers.rb', line 33
def current_indent
 compiler.parser_indent
end

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# File 'opal/lib/opal/nodes/helpers.rb', line 42
def empty_line
 push "\n"
end

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# File 'opal/lib/opal/nodes/helpers.rb', line 29
def indent(&block)
 compiler.indent(&block)
end

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# File 'opal/lib/opal/nodes/helpers.rb', line 55
def js_falsy(sexp)
 if sexp.type == :send
 mid = sexp.children[1]
 if mid == :block_given?
 scope.uses_block!
 return "#{scope.block_name} === nil"
 end
 end
 helper :falsy
 [fragment('$falsy('), expr(sexp), fragment(')')]
end

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# File 'opal/lib/opal/nodes/helpers.rb', line 46
def js_truthy(sexp)
 if optimize = js_truthy_optimize(sexp)
 return optimize
 end
 helper :truthy
 [fragment('$truthy('), expr(sexp), fragment(')')]
end

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# File 'opal/lib/opal/nodes/helpers.rb', line 68
def js_truthy_optimize(sexp)
 if sexp.type == :send
 mid = sexp.children[1]
 receiver_handler_class = (receiver = sexp.children[0]) && compiler.handlers[receiver.type]
 # Only operator calls on the truthy_optimize? node classes should be optimized.
 # Monkey patch method calls might return 'self'/aka a bridged instance and need
 # the nil check - see discussion at https://github.com/opal/opal/pull/1097
 allow_optimization_on_type = Compiler ::COMPARE .include?(mid.to_s) &&
 receiver_handler_class &&
 receiver_handler_class.truthy_optimize?
 if allow_optimization_on_type ||
 mid == :block_given? ||
 mid == :=="
 expr(sexp)
 end
 end
end

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# File 'opal/lib/opal/nodes/helpers.rb', line 37
def line(*strs)
 push "\n#{current_indent}"
 push(*strs)
end

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# File 'opal/lib/opal/nodes/helpers.rb', line 21
def mid_to_jsid(mid)
 if %r{\=|\+|\-|\*|\/|\!|\?|<|\>|\&|\||\^|\%|\~|\[} =~ mid.to_s
 "['$#{mid}']"
 else
 '.$' + mid
 end
end

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# File 'opal/lib/opal/nodes/helpers.rb', line 8
def property(name)
 valid_name?(name) ? ".#{name}" : "[#{name.inspect}]"
end

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# File 'opal/lib/opal/nodes/helpers.rb', line 12
def valid_name?(name)
 Opal ::Rewriters ::JsReservedWords .valid_name? (name)
end