Class: Opal::Nodes::StringNode
- Defined in:
- opal/lib/opal/nodes/literal.rb
Constant Summary collapse
- ESCAPE_CHARS =
{ 'a' => '\\u0007', 'e' => '\\u001b' }.freeze
- ESCAPE_REGEX =
/(\\+)([#{ ESCAPE_CHARS.keys.join('') }])/.freeze
Instance Attribute Summary
Attributes inherited from Base
Attributes included from Closure::NodeSupport
Instance Method Summary collapse
Methods inherited from Base
#add_gvar, #add_ivar, #add_local, #add_temp, #children, children, #class_variable_owner, #class_variable_owner_nesting_level, #comments, #compile_to_fragments, #error, #expr, #expr?, #expr_or_empty, #expr_or_nil, #fragment, handle, handlers, #has_rescue_else?, #helper, #in_ensure, #in_ensure?, #in_resbody, #in_resbody?, #in_rescue, #in_while?, #initialize, #process, #push, #recv, #recv?, #s, #scope, #source_location, #stmt, #stmt?, #top_scope, truthy_optimize?, #unshift, #while_loop, #with_temp, #wrap
Methods included from Closure::NodeSupport
#closure_is?, #compile_catcher, #generate_thrower, #generate_thrower_without_catcher, #in_closure, #pop_closure, #push_closure, #select_closure, #thrower
Methods included from Helpers
#current_indent, #empty_line, #indent, #js_truthy, #js_truthy_optimize, #line, #mid_to_jsid, #property, #valid_name?
Constructor Details
This class inherits a constructor from Opal::Nodes::Base
Instance Method Details
#compile ⇒ Object
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# File 'opal/lib/opal/nodes/literal.rb', line 60 def compile string_value = value sanitized_value = string_value.inspect.gsub(/\\u\{([0-9a-f]+)\}/) do code_point = Regexp.last_match(1).to_i(16) to_utf16(code_point) end push translate_escape_chars(sanitized_value) if RUBY_ENGINE != 'opal' encoding = string_value.encoding unless encoding == Encoding::UTF_8 helper :enc wrap "$enc(", ", \"#{encoding.name}\")" end end unless value.valid_encoding? helper :binary wrap "$binary(", ")" end end |
#to_utf16(code_point) ⇒ Object
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# File 'opal/lib/opal/nodes/literal.rb', line 85 def to_utf16(code_point) ten_bits = 0b1111111111 u = ->(code_unit) { '\\u' + code_unit.to_s(16).upcase } return u.call(code_point) if code_point <= 0xFFFF code_point -= 0x10000 # Shift right to get to most significant 10 bits lead_surrogate = 0xD800 + (code_point >> 10) # Mask to get least significant 10 bits tail_surrogate = 0xDC00 + (code_point & ten_bits) u.call(lead_surrogate) + u.call(tail_surrogate) end |
#translate_escape_chars(inspect_string) ⇒ Object
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# File 'opal/lib/opal/nodes/literal.rb', line 50 def translate_escape_chars(inspect_string) inspect_string.gsub(ESCAPE_REGEX) do |original| if Regexp.last_match(1).length.even? original else Regexp.last_match(1).chop + ESCAPE_CHARS[Regexp.last_match(2)] end end end |