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Commit	Line	Data
	1	/*
	2	* Copyright (C) 2009 Apple Inc. All rights reserved.
	3	*
	4	* Redistribution and use in source and binary forms, with or without
	5	* modification, are permitted provided that the following conditions
	6	* are met:
	7	* 1. Redistributions of source code must retain the above copyright
	8	* notice, this list of conditions and the following disclaimer.
	9	* 2. Redistributions in binary form must reproduce the above copyright
	10	* notice, this list of conditions and the following disclaimer in the
	11	* documentation and/or other materials provided with the distribution.
	12	*
	13	* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
	14	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	15	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	16	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
	17	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	18	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	19	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	20	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	21	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	23	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	24	*/
	25
	26	#ifndef PropertyDescriptor_h
	27	#define PropertyDescriptor_h
	28
	29	#include "JSValue.h"
	30
	31	namespace JSC {
	32	class GetterSetter;
	33
	34	// See ES5.1 9.12
	35	bool sameValue(ExecState*, JSValue, JSValue);
	36
	37	class PropertyDescriptor {
	38	public:
	39	PropertyDescriptor()
	40	: m_attributes(defaultAttributes)
	41	, m_seenAttributes(0)
	42	{
	43	}
	44	JS_EXPORT_PRIVATE bool writable() const;
	45	JS_EXPORT_PRIVATE bool enumerable() const;
	46	JS_EXPORT_PRIVATE bool configurable() const;
	47	JS_EXPORT_PRIVATE bool isDataDescriptor() const;
	48	bool isGenericDescriptor() const;
	49	JS_EXPORT_PRIVATE bool isAccessorDescriptor() const;
	50	unsigned attributes() const { return m_attributes; }
	51	JSValue value() const { return m_value; }
	52	JS_EXPORT_PRIVATE JSValue getter() const;
	53	JS_EXPORT_PRIVATE JSValue setter() const;
	54	JSObject* getterObject() const;
	55	JSObject* setterObject() const;
	56	JS_EXPORT_PRIVATE void setUndefined();
	57	JS_EXPORT_PRIVATE void setDescriptor(JSValue value, unsigned attributes);
	58	void setAccessorDescriptor(GetterSetter* accessor, unsigned attributes);
	59	JS_EXPORT_PRIVATE void setWritable(bool);
	60	JS_EXPORT_PRIVATE void setEnumerable(bool);
	61	JS_EXPORT_PRIVATE void setConfigurable(bool);
	62	void setValue(JSValue value) { m_value = value; }
	63	JS_EXPORT_PRIVATE void setSetter(JSValue);
	64	JS_EXPORT_PRIVATE void setGetter(JSValue);
	65	bool isEmpty() const { return !(m_value \|\| m_getter \|\| m_setter \|\| m_seenAttributes); }
	66	bool writablePresent() const { return m_seenAttributes & WritablePresent; }
	67	bool enumerablePresent() const { return m_seenAttributes & EnumerablePresent; }
	68	bool configurablePresent() const { return m_seenAttributes & ConfigurablePresent; }
	69	bool setterPresent() const { return m_setter; }
	70	bool getterPresent() const { return m_getter; }
	71	bool equalTo(ExecState* exec, const PropertyDescriptor& other) const;
	72	bool attributesEqual(const PropertyDescriptor& other) const;
	73	unsigned attributesOverridingCurrent(const PropertyDescriptor& current) const;
	74
	75	private:
	76	JS_EXPORTDATA static unsigned defaultAttributes;
	77	bool operator==(const PropertyDescriptor&){ return false; }
	78	enum { WritablePresent = 1, EnumerablePresent = 2, ConfigurablePresent = 4};
	79	// May be a getter/setter
	80	JSValue m_value;
	81	JSValue m_getter;
	82	JSValue m_setter;
	83	unsigned m_attributes;
	84	unsigned m_seenAttributes;
	85	};
	86	}
	87
	88	#endif