Class: Opal::Nodes::TopNode

Inherits:
ScopeNode show all
Defined in:
opal/lib/opal/nodes/top.rb

Overview

Generates code for an entire file, i.e. the base sexp

Constant Summary

Constants included from Helpers

Helpers::BASIC_IDENTIFIER_RULES, Helpers::ES3_RESERVED_WORD_EXCLUSIVE, Helpers::ES51_RESERVED_WORD, Helpers::IMMUTABLE_PROPS

Instance Attribute Summary

Attributes inherited from ScopeNode

#block_name, #catch_return, #defs, #gvars, #ivars, #methods, #mid, #name, #parent, #scope_name, #uses_super, #uses_zuper

Attributes inherited from Base

#compiler, #type

Instance Method Summary collapse

Methods inherited from ScopeNode

#add_arg, #add_proto_ivar, #add_scope_gvar, #add_scope_ivar, #add_scope_local, #add_scope_temp, #class?, #class_scope?, #def?, #def_in_class?, #find_parent_def, #get_super_chain, #has_local?, #has_temp?, #identify!, #identity, #in_scope, #in_while?, #initialize, #iter?, #module?, #new_temp, #next_temp, #pop_while, #proto, #push_while, #queue_temp, #sclass?, #to_vars, #top?, #uses_block!, #uses_block?

Methods inherited from Base

#add_gvar, #add_ivar, #add_local, #add_temp, children, #children, #compile_to_fragments, #error, #expr, #expr?, #expr_or_nil, #fragment, handle, handlers, #helper, #in_while?, #initialize, #process, #push, #recv, #recv?, #s, #scope, #stmt, #stmt?, #unshift, #while_loop, #with_temp, #wrap

Methods included from Helpers

#current_indent, #empty_line, #indent, #js_falsy, #js_truthy, #js_truthy_optimize, #line, #lvar_to_js, #mid_to_jsid, #property, #valid_name?, #variable

Constructor Details

This class inherits a constructor from Opal::Nodes::ScopeNode

Instance Method Details

#add_used_helpers ⇒ Object 



67
68
69
70
 
# File 'opal/lib/opal/nodes/top.rb', line 67

def add_used_helpers
  helpers = compiler.helpers.to_a
  helpers.to_a.each { |h| add_temp "$#{h} = Opal.#{h}" }
end

#add_used_operators ⇒ Object 



72
73
74
75
76
77
78
79
80
 
# File 'opal/lib/opal/nodes/top.rb', line 72

def add_used_operators
  operators = compiler.operator_helpers.to_a
  operators.each do |op|
    name = Nodes::CallNode::OPERATORS[op]
    line "function $rb_#{name}(lhs, rhs) {"
    line "  return (typeof(lhs) === 'number' && typeof(rhs) === 'number') ? lhs #{op} rhs : lhs['$#{op}'](rhs);"
    line "}"
  end
end

#closing ⇒ Object 



49
50
51
52
53
54
55
 
# File 'opal/lib/opal/nodes/top.rb', line 49

def closing
  if compiler.requirable?
    line "};\n"
  else
    line "})(Opal);\n"
  end
end

#compile ⇒ Object 



13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
 
# File 'opal/lib/opal/nodes/top.rb', line 13

def compile
  push version_comment

  opening
  in_scope do
    line "Opal.dynamic_require_severity = #{compiler.dynamic_require_severity.to_s.inspect};"
    body_code = stmt(stmts)
    body_code = [body_code] unless body_code.is_a?(Array)

    add_temp 'self = Opal.top'
    add_temp '$scope = Opal'
    add_temp 'nil = Opal.nil'

    add_used_helpers
    add_used_operators
    line scope.to_vars

    compile_method_stubs
    compile_irb_vars
    compile_end_construct

    line body_code
  end

  closing
end

#compile_end_construct ⇒ Object

Any special END content in code



91
92
93
94
95
96
 
# File 'opal/lib/opal/nodes/top.rb', line 91

def compile_end_construct
  if content = compiler.eof_content
    line "var $__END__ = Opal.Object.$new();"
    line "$__END__.$read = function() { return #{content.inspect}; };"
  end
end

#compile_irb_vars ⇒ Object 



61
62
63
64
65
 
# File 'opal/lib/opal/nodes/top.rb', line 61

def compile_irb_vars
  if compiler.irb?
    line "if (!Opal.irb_vars) { Opal.irb_vars = {}; }"
  end
end

#compile_method_stubs ⇒ Object 



82
83
84
85
86
87
88
 
# File 'opal/lib/opal/nodes/top.rb', line 82

def compile_method_stubs
  if compiler.method_missing?
    calls = compiler.method_calls
    stubs = calls.to_a.map { |k| "'$#{k}'" }.join(', ')
    line "Opal.add_stubs([#{stubs}]);" unless stubs.empty?
  end
end

#opening ⇒ Object 



40
41
42
43
44
45
46
47
 
# File 'opal/lib/opal/nodes/top.rb', line 40

def opening
  if compiler.requirable?
    path = Pathname(compiler.file).cleanpath.to_s
    line "Opal.modules[#{path.inspect}] = function(Opal) {"
  else
    line "(function(Opal) {"
  end
end

#stmts ⇒ Object 



57
58
59
 
# File 'opal/lib/opal/nodes/top.rb', line 57

def stmts
  compiler.returns(body)
end

#version_comment ⇒ Object 



98
99
100
 
# File 'opal/lib/opal/nodes/top.rb', line 98

def version_comment
  "/* Generated by Opal #{Opal::VERSION} */"
end