Class: Johnson::SpiderMonkey::RubyLandProxy

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/johnson/spidermonkey/ruby_land_proxy.rb,
ext/spidermonkey/ruby_land_proxy.c

Overview

native

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(sym, *args, &block) ⇒ Object 



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# File 'lib/johnson/spidermonkey/ruby_land_proxy.rb', line 32

def method_missing(sym, *args, &block)
  args << block if block_given?
  
  name = sym.to_s
  assignment = "=" == name[-1, 1]
  
  # default behavior if the slot's not there
  return super unless assignment || respond_to?(sym)
  
  unless function_property?(name)
    # for arity 0, treat it as a get
    return self[name] if args.empty?

    # arity 1 and quacking like an assignment, treat it as a set
    return self[name[0..-2]] = args[0] if assignment && 1 == args.size
  end        
  
  # okay, must really be a function
  call_function_property(name, *args)
end

Instance Method Details

#[](name) ⇒ Object

Returns the property with name.



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# File 'ext/spidermonkey/ruby_land_proxy.c', line 50

static VALUE
get(VALUE self, VALUE name)
{
  RubyLandProxy* proxy;
  Data_Get_Struct(self, RubyLandProxy, proxy);

  JSContext * context = johnson_get_current_context(proxy->runtime);
  PREPARE_RUBY_JROOTS(context, 1);
  
  jsval proxy_value;
  JCHECK(get_jsval_for_proxy(proxy, &proxy_value));
  JROOT(proxy_value);

  jsval js_value;  

  switch(TYPE(name)) {
    case T_FIXNUM:
      JCHECK(JS_GetElement(context,
          JSVAL_TO_OBJECT(proxy_value), (jsint)(NUM2INT(name)), &js_value));
      break;
    default:
      Check_Type(name, T_STRING);
      JCHECK(JS_GetProperty(context,
          JSVAL_TO_OBJECT(proxy_value), StringValueCStr(name), &js_value));
      break;
  }

  JRETURN_RUBY(CONVERT_TO_RUBY(proxy->runtime, js_value));
}

#[]=(name, value) ⇒ Object

Sets the property with name to value.



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# File 'ext/spidermonkey/ruby_land_proxy.c', line 86

static VALUE
set(VALUE self, VALUE name, VALUE value)
{
  RubyLandProxy* proxy;
  Data_Get_Struct(self, RubyLandProxy, proxy);
  JSContext * context = johnson_get_current_context(proxy->runtime);
  
  PREPARE_RUBY_JROOTS(context, 2);
  
  jsval proxy_value;
  JCHECK(get_jsval_for_proxy(proxy, &proxy_value));
  JROOT(proxy_value);

  jsval js_value;
  JCHECK(convert_to_js(proxy->runtime, value, &js_value));
  
  JROOT(js_value);

  switch(TYPE(name)) {
    case T_FIXNUM:
      JCHECK(JS_SetElement(context,
              JSVAL_TO_OBJECT(proxy_value), (jsint)(NUM2INT(name)), &js_value));
      break;
    default:
      Check_Type(name, T_STRING);
      JCHECK(JS_SetProperty(context,
            JSVAL_TO_OBJECT(proxy_value), StringValueCStr(name), &js_value));
      break;
  }

  JRETURN_RUBY(value);
}

#call(*args) ⇒ Object 



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# File 'lib/johnson/spidermonkey/ruby_land_proxy.rb', line 20

def call(*args)
  call_using(runtime.global, *args)
end

#call_using(this, *args) ⇒ Object 



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# File 'lib/johnson/spidermonkey/ruby_land_proxy.rb', line 24

def call_using(this, *args)
  native_call(this, *args)
end

#each {|obj| ... } ⇒ Object

Calls block with each item in the collection.

Yields:

  • (obj) 


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# File 'ext/spidermonkey/ruby_land_proxy.c', line 224

static VALUE
each(VALUE self)
{
  RubyLandProxy* proxy;
  Data_Get_Struct(self, RubyLandProxy, proxy);
  JSContext * context = johnson_get_current_context(proxy->runtime);
  
  PREPARE_RUBY_JROOTS(context, 5);
  
  jsval proxy_value;
  JCHECK(get_jsval_for_proxy(proxy, &proxy_value));
  JROOT(proxy_value);

  JSObject* value = JSVAL_TO_OBJECT(proxy_value);
  JROOT(value);
  
  // arrays behave like you'd expect, indexes in order
  if (JS_IsArrayObject(context, value))
  {
    jsuint length;
    JCHECK(JS_GetArrayLength(context, value, &length));
    
    jsuint i = 0;
    for (i = 0; i < length; ++i)
    {
      jsval element;
      JCHECK(JS_GetElement(context, value, (signed) i, &element));
      CALL_RUBY_WRAPPER(rb_yield, convert_to_ruby(proxy->runtime, element));
    }
  }
  else
  {
    // not an array? behave like each on Hash; yield [key, value]
    JSIdArray* ids = JS_Enumerate(context, value);
    JCHECK(ids);

    JCLEANUP(destroy_id_array, ids);

    int i;
    for (i = 0; i < ids->length; ++i)
    {
      jsval js_key, js_value;

      JCHECK(JS_IdToValue(context, ids->vector[i], &js_key));
      JROOT(js_key);

      if (JSVAL_IS_STRING(js_key))
      {
        // regular properties have string keys
        JCHECK(JS_GetProperty(context, value,
          JS_GetStringBytes(JSVAL_TO_STRING(js_key)), &js_value));
      }
      else
      {
        // it's a numeric property, use array access
        JCHECK(JS_GetElement(context, value,
          JSVAL_TO_INT(js_key), &js_value));
      }
      JROOT(js_value);

      VALUE key = CONVERT_TO_RUBY(proxy->runtime, js_key);
      VALUE value = CONVERT_TO_RUBY(proxy->runtime, js_value);

      CALL_RUBY_WRAPPER(rb_yield, rb_ary_new3(2L, key, value));

      JUNROOT(js_value);
      JUNROOT(js_key);
    }
  }

  JRETURN_RUBY(self);
}

#function? ⇒ Boolean

Returns true if this is a function.

Returns:

  • (Boolean) 


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# File 'ext/spidermonkey/ruby_land_proxy.c', line 125

static VALUE
function_p(VALUE self)
{
  RubyLandProxy* proxy;
  Data_Get_Struct(self, RubyLandProxy, proxy);
  JSContext * context = johnson_get_current_context(proxy->runtime);
  PREPARE_RUBY_JROOTS(context, 1);
  jsval proxy_value;
  JCHECK(get_jsval_for_proxy(proxy, &proxy_value));
  JROOT(proxy_value);
  JRETURN_RUBY(JS_TypeOfValue(context, proxy_value) == JSTYPE_FUNCTION ? Qtrue : Qfalse);
}

#inspect ⇒ Object 



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# File 'lib/johnson/spidermonkey/ruby_land_proxy.rb', line 28

def inspect
  toString
end

#length ⇒ Object Also known as: size

Returns the length of the collection.



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# File 'ext/spidermonkey/ruby_land_proxy.c', line 303

static VALUE
length(VALUE self)
{
  RubyLandProxy* proxy;
  Data_Get_Struct(self, RubyLandProxy, proxy);
  JSContext * context = johnson_get_current_context(proxy->runtime);

  PREPARE_RUBY_JROOTS(context, 2);
  
  jsval proxy_value;
  JCHECK(get_jsval_for_proxy(proxy, &proxy_value));
  JROOT(proxy_value);

  JSObject* value = JSVAL_TO_OBJECT(proxy_value);
  JROOT(value);
  
  if (JS_IsArrayObject(context, value))
  {
    jsuint length;
    JCHECK(JS_GetArrayLength(context, value, &length));

    JRETURN_RUBY(INT2FIX(length));
  }
  else
  {
    JSIdArray* ids = JS_Enumerate(context, value);
    JCHECK(ids);
    VALUE length = INT2FIX(ids->length);
    
    JS_DestroyIdArray(context, ids);

    JRETURN_RUBY(length);
  }
}

#respond_to?(symbol) ⇒ Boolean

Returns true if obj responds to given method.

Returns:

  • (Boolean) 


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# File 'ext/spidermonkey/ruby_land_proxy.c', line 144

static VALUE
respond_to_p(int argc, const VALUE* argv, VALUE self)
{
  VALUE sym, priv;

  rb_scan_args(argc, argv, "11", &sym, &priv);

  RubyLandProxy* proxy;
  Data_Get_Struct(self, RubyLandProxy, proxy);

  JSContext * context = johnson_get_current_context(proxy->runtime);
  PREPARE_RUBY_JROOTS(context, 2);
  
  VALUE stringval = rb_funcall(sym, rb_intern("to_s"), 0);
  char* name = StringValuePtr(stringval);
  
  // assignment is always okay
  if (name[strlen(name) - 1] == '=')
    JRETURN_RUBY(Qtrue);
  
  jsval proxy_value;
  JCHECK(get_jsval_for_proxy(proxy, &proxy_value));
  JROOT(proxy_value);

  JSObject *obj;
  JSBool found;
  
  JCHECK(JS_ValueToObject(context, proxy_value, &obj));
  JROOT(obj);

  JCHECK(JS_HasProperty(context, obj, name, &found));

  JRETURN_RUBY(found ? Qtrue : CALL_RUBY_WRAPPER(rb_call_super, argc, argv));
}

#to_proc ⇒ Object 



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# File 'lib/johnson/spidermonkey/ruby_land_proxy.rb', line 16

def to_proc
  @proc ||= Proc.new { |*args| call(*args) }
end

#to_s ⇒ Object

Converts object to a string.



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# File 'ext/spidermonkey/ruby_land_proxy.c', line 429

static VALUE to_s(VALUE self)
{
  RubyLandProxy* proxy;
  Data_Get_Struct(self, RubyLandProxy, proxy);
  JSContext * context = johnson_get_current_context(proxy->runtime);

  PREPARE_RUBY_JROOTS(context, 1);
  
  jsval proxy_value;
  JCHECK(get_jsval_for_proxy(proxy, &proxy_value));
  JROOT(proxy_value);
  
  JSString* str = JS_ValueToString(context, proxy_value);
  JRETURN_RUBY(convert_js_string_to_ruby(proxy->runtime, str));
}