Module: __JS__::Opal

Defined in:
opal/opal/corelib/runtime.js.rb

Overview

This module is just a placeholder for showing the documentation of the internal JavaScript runtime. The methods you'll find defined below are actually JavaScript functions attached to the Opal global object

Class Method Summary collapse

Class Method Details

.are_both_numbers_or_strings ⇒ Object

Optimized helpers for calls like $truthy((a)'$===') -> $eqeqeq(a, b)



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# File 'opal/opal/corelib/runtime.js.rb', line 140

def self.are_both_numbers_or_strings(*)
<<-JAVASCRIPT
   function are_both_numbers_or_strings(lhs, rhs) {
     return (typeof lhs === 'number' && typeof rhs === 'number') ||
            (typeof lhs === 'string' && typeof rhs === 'string');
   }
JAVASCRIPT
end

.const_get_name ⇒ Object

Get the constant in the scope of the current cref



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# File 'opal/opal/corelib/runtime.js.rb', line 7

def self.const_get_name(*)
<<-JAVASCRIPT
   function const_get_name(cref, name) {
     if (cref) {
       if (cref.$$const[name] != null) { return cref.$$const[name]; }
       if (cref.$$autoload && cref.$$autoload[name]) {
         return handle_autoload(cref, name);
       }
     }
   }
JAVASCRIPT
end

.const_lookup_ancestors ⇒ Object

Walk up the ancestors chain looking for the constant



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# File 'opal/opal/corelib/runtime.js.rb', line 45

def self.const_lookup_ancestors(*)
<<-JAVASCRIPT
   function const_lookup_ancestors(cref, name) {
     var i, ii, ancestors;
   
     if (cref == null) return;
   
     ancestors = $ancestors(cref);
   
     for (i = 0, ii = ancestors.length; i < ii; i++) {
       if (ancestors[i].$$const && $has_own.call(ancestors[i].$$const, name)) {
         return ancestors[i].$$const[name];
       } else if (ancestors[i].$$autoload && ancestors[i].$$autoload[name]) {
         return handle_autoload(ancestors[i], name);
       }
     }
   }
JAVASCRIPT
end

.const_lookup_nesting ⇒ Object

Walk up the nesting array looking for the constant



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# File 'opal/opal/corelib/runtime.js.rb', line 22

def self.const_lookup_nesting(*)
<<-JAVASCRIPT
   function const_lookup_nesting(nesting, name) {
     var i, ii, constant;
   
     if (nesting.length === 0) return;
   
     // If the nesting is not empty the constant is looked up in its elements
     // and in order. The ancestors of those elements are ignored.
     for (i = 0, ii = nesting.length; i < ii; i++) {
       constant = nesting[i].$$const[name];
       if (constant != null) {
         return constant;
       } else if (nesting[i].$$autoload && nesting[i].$$autoload[name]) {
         return handle_autoload(nesting[i], name);
       }
     }
   }
JAVASCRIPT
end

.const_lookup_Object ⇒ Object

Walk up Object's ancestors chain looking for the constant, but only if cref is missing or a module.



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# File 'opal/opal/corelib/runtime.js.rb', line 68

def self.const_lookup_Object(*)
<<-JAVASCRIPT
   function const_lookup_Object(cref, name) {
     if (cref == null || cref.$$is_module) {
       return const_lookup_ancestors(_Object, name);
     }
   }
JAVASCRIPT
end

.const_missing ⇒ Object

Call const_missing if nothing else worked



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# File 'opal/opal/corelib/runtime.js.rb', line 80

def self.const_missing(*)
<<-JAVASCRIPT
   function const_missing(cref, name) {
     return (cref || _Object).$const_missing(name);
   }
JAVASCRIPT
end

.create_dummy_iclass ⇒ Object

Dummy iclass doesn't receive updates when the module gets a new method.



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# File 'opal/opal/corelib/runtime.js.rb', line 112

def self.create_dummy_iclass(*)
<<-JAVASCRIPT
   function create_dummy_iclass(module) {
     var iclass = {},
         proto = module.$$prototype;
   
     if (proto.hasOwnProperty('$$dummy')) {
       proto = proto.$$define_methods_on;
     }
   
     var props = Object.getOwnPropertyNames(proto),
         length = props.length, i;
   
     for (i = 0; i < length; i++) {
       var prop = props[i];
       $prop(iclass, prop, proto[prop]);
     }
   
     $prop(iclass, '$$iclass', true);
     $prop(iclass, '$$module', module);
   
     return iclass;
   }
JAVASCRIPT
end

.set_meta ⇒ Object

helper to set $$meta on klass, module or instance



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# File 'opal/opal/corelib/runtime.js.rb', line 90

def self.set_meta(*)
<<-JAVASCRIPT
   function set_meta(obj, meta) {
     if (obj.hasOwnProperty('$$meta')) {
       obj.$$meta = meta;
     } else {
       $prop(obj, '$$meta', meta);
     }
     if (obj.$$frozen) {
       // If a object is frozen (sealed), freeze $$meta too.
       // No need to inject $$meta.$$prototype in the prototype chain,
       // as $$meta cannot be modified anyway.
       obj.$$meta.$freeze();
     } else {
       $set_proto(obj, meta.$$prototype);
     }
   };
JAVASCRIPT
end

.top_define_method ⇒ Object

Foward calls to define_method on the top object to Object



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# File 'opal/opal/corelib/runtime.js.rb', line 151

def self.top_define_method(*)
<<-JAVASCRIPT
   function top_define_method() {
     var args = Opal.slice.call(arguments);
     var block = top_define_method.$$p;
     top_define_method.$$p = null;
     return Opal.send(_Object, 'define_method', args, block)
   };
JAVASCRIPT
end