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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsMathMLOperators_h___
#define nsMathMLOperators_h___
#include <stdint.h>
#include "nsStringFwd.h"
enum nsStretchDirection {
NS_STRETCH_DIRECTION_UNSUPPORTED = -1,
NS_STRETCH_DIRECTION_DEFAULT = 0,
NS_STRETCH_DIRECTION_HORIZONTAL = 1,
NS_STRETCH_DIRECTION_VERTICAL = 2
};
typedef uint32_t nsOperatorFlags;
enum {
// define the bits used to handle the operator
NS_MATHML_OPERATOR_MUTABLE = 1<<30,
NS_MATHML_OPERATOR_EMBELLISH_ANCESTOR = 1<<29,
NS_MATHML_OPERATOR_EMBELLISH_ISOLATED = 1<<28,
NS_MATHML_OPERATOR_CENTERED = 1<<27,
NS_MATHML_OPERATOR_INVISIBLE = 1<<26,
// define the bits used in the Operator Dictionary
// the very last two bits tell us the form
NS_MATHML_OPERATOR_FORM = 0x3,
NS_MATHML_OPERATOR_FORM_INFIX = 1,
NS_MATHML_OPERATOR_FORM_PREFIX = 2,
NS_MATHML_OPERATOR_FORM_POSTFIX = 3,
// the next 2 bits tell us the direction
NS_MATHML_OPERATOR_DIRECTION = 0x3<<2,
NS_MATHML_OPERATOR_DIRECTION_HORIZONTAL = 1<<2,
NS_MATHML_OPERATOR_DIRECTION_VERTICAL = 2<<2,
// other bits used in the Operator Dictionary
NS_MATHML_OPERATOR_STRETCHY = 1<<4,
NS_MATHML_OPERATOR_FENCE = 1<<5,
NS_MATHML_OPERATOR_ACCENT = 1<<6,
NS_MATHML_OPERATOR_LARGEOP = 1<<7,
NS_MATHML_OPERATOR_SEPARATOR = 1<<8,
NS_MATHML_OPERATOR_MOVABLELIMITS = 1<<9,
NS_MATHML_OPERATOR_SYMMETRIC = 1<<10,
NS_MATHML_OPERATOR_INTEGRAL = 1<<11,
NS_MATHML_OPERATOR_MIRRORABLE = 1<<12,
// Additional bits not stored in the dictionary
NS_MATHML_OPERATOR_MINSIZE_ABSOLUTE = 1<<13,
NS_MATHML_OPERATOR_MAXSIZE_ABSOLUTE = 1<<14,
NS_MATHML_OPERATOR_LSPACE_ATTR = 1<<15,
NS_MATHML_OPERATOR_RSPACE_ATTR = 1<<16
};
#define NS_MATHML_OPERATOR_SIZE_INFINITY NS_IEEEPositiveInfinity()
class nsMathMLOperators {
public:
static void AddRefTable(void);
static void ReleaseTable(void);
static void CleanUp();
// LookupOperator:
// Given the string value of an operator and its form (last two bits of flags),
// this method returns true if the operator is found in the Operator Dictionary.
// Attributes of the operator are returned in the output parameters.
// If the operator is not found under the supplied form but is found under a
// different form, the method returns true as well. The caller can test the
// output parameter aFlags to know exactly under which form the operator was
// found in the Operator Dictionary.
static bool
LookupOperator(const nsString& aOperator,
const nsOperatorFlags aForm,
nsOperatorFlags* aFlags,
float* aLeadingSpace,
float* aTrailingSpace);
// LookupOperators:
// Helper to return all the forms under which an operator is listed in the
// Operator Dictionary. The caller must pass arrays of size 4, and use
// aFlags[NS_MATHML_OPERATOR_FORM_{INFIX|POSTFIX|PREFIX}],
// aLeadingSpace[], etc, to access the attributes of the operator under a
// particular form. If the operator wasn't found under a form, its entry
// aFlags[form] is set to zero.
static void
LookupOperators(const nsString& aOperator,
nsOperatorFlags* aFlags,
float* aLeadingSpace,
float* aTrailingSpace);
// Helper functions used by the nsMathMLChar class.
static bool
IsMirrorableOperator(const nsString& aOperator);
// Helper function used by the nsMathMLChar class.
static nsStretchDirection GetStretchyDirection(const nsString& aOperator);
};
////////////////////////////////////////////////////////////////////////////
// Macros that retrieve the bits used to handle operators
#define NS_MATHML_OPERATOR_IS_MUTABLE(_flags) \
(NS_MATHML_OPERATOR_MUTABLE == ((_flags) & NS_MATHML_OPERATOR_MUTABLE))
#define NS_MATHML_OPERATOR_HAS_EMBELLISH_ANCESTOR(_flags) \
(NS_MATHML_OPERATOR_EMBELLISH_ANCESTOR == ((_flags) & NS_MATHML_OPERATOR_EMBELLISH_ANCESTOR))
#define NS_MATHML_OPERATOR_EMBELLISH_IS_ISOLATED(_flags) \
(NS_MATHML_OPERATOR_EMBELLISH_ISOLATED == ((_flags) & NS_MATHML_OPERATOR_EMBELLISH_ISOLATED))
#define NS_MATHML_OPERATOR_IS_CENTERED(_flags) \
(NS_MATHML_OPERATOR_CENTERED == ((_flags) & NS_MATHML_OPERATOR_CENTERED))
#define NS_MATHML_OPERATOR_IS_INVISIBLE(_flags) \
(NS_MATHML_OPERATOR_INVISIBLE == ((_flags) & NS_MATHML_OPERATOR_INVISIBLE))
#define NS_MATHML_OPERATOR_GET_FORM(_flags) \
((_flags) & NS_MATHML_OPERATOR_FORM)
#define NS_MATHML_OPERATOR_GET_DIRECTION(_flags) \
((_flags) & NS_MATHML_OPERATOR_DIRECTION)
#define NS_MATHML_OPERATOR_FORM_IS_INFIX(_flags) \
(NS_MATHML_OPERATOR_FORM_INFIX == ((_flags) & NS_MATHML_OPERATOR_FORM))
#define NS_MATHML_OPERATOR_FORM_IS_PREFIX(_flags) \
(NS_MATHML_OPERATOR_FORM_PREFIX == ((_flags) & NS_MATHML_OPERATOR_FORM))
#define NS_MATHML_OPERATOR_FORM_IS_POSTFIX(_flags) \
(NS_MATHML_OPERATOR_FORM_POSTFIX == ((_flags) & NS_MATHML_OPERATOR_FORM))
#define NS_MATHML_OPERATOR_IS_DIRECTION_VERTICAL(_flags) \
(NS_MATHML_OPERATOR_DIRECTION_VERTICAL == ((_flags) & NS_MATHML_OPERATOR_DIRECTION))
#define NS_MATHML_OPERATOR_IS_DIRECTION_HORIZONTAL(_flags) \
(NS_MATHML_OPERATOR_DIRECTION_HORIZONTAL == ((_flags) & NS_MATHML_OPERATOR_DIRECTION))
#define NS_MATHML_OPERATOR_IS_STRETCHY(_flags) \
(NS_MATHML_OPERATOR_STRETCHY == ((_flags) & NS_MATHML_OPERATOR_STRETCHY))
#define NS_MATHML_OPERATOR_IS_FENCE(_flags) \
(NS_MATHML_OPERATOR_FENCE == ((_flags) & NS_MATHML_OPERATOR_FENCE))
#define NS_MATHML_OPERATOR_IS_ACCENT(_flags) \
(NS_MATHML_OPERATOR_ACCENT == ((_flags) & NS_MATHML_OPERATOR_ACCENT))
#define NS_MATHML_OPERATOR_IS_LARGEOP(_flags) \
(NS_MATHML_OPERATOR_LARGEOP == ((_flags) & NS_MATHML_OPERATOR_LARGEOP))
#define NS_MATHML_OPERATOR_IS_SEPARATOR(_flags) \
(NS_MATHML_OPERATOR_SEPARATOR == ((_flags) & NS_MATHML_OPERATOR_SEPARATOR))
#define NS_MATHML_OPERATOR_IS_MOVABLELIMITS(_flags) \
(NS_MATHML_OPERATOR_MOVABLELIMITS == ((_flags) & NS_MATHML_OPERATOR_MOVABLELIMITS))
#define NS_MATHML_OPERATOR_IS_SYMMETRIC(_flags) \
(NS_MATHML_OPERATOR_SYMMETRIC == ((_flags) & NS_MATHML_OPERATOR_SYMMETRIC))
#define NS_MATHML_OPERATOR_IS_INTEGRAL(_flags) \
(NS_MATHML_OPERATOR_INTEGRAL == ((_flags) & NS_MATHML_OPERATOR_INTEGRAL))
#define NS_MATHML_OPERATOR_IS_MIRRORABLE(_flags) \
(NS_MATHML_OPERATOR_MIRRORABLE == ((_flags) & NS_MATHML_OPERATOR_MIRRORABLE))
#define NS_MATHML_OPERATOR_MINSIZE_IS_ABSOLUTE(_flags) \
(NS_MATHML_OPERATOR_MINSIZE_ABSOLUTE == ((_flags) & NS_MATHML_OPERATOR_MINSIZE_ABSOLUTE))
#define NS_MATHML_OPERATOR_MAXSIZE_IS_ABSOLUTE(_flags) \
(NS_MATHML_OPERATOR_MAXSIZE_ABSOLUTE == ((_flags) & NS_MATHML_OPERATOR_MAXSIZE_ABSOLUTE))
#define NS_MATHML_OPERATOR_HAS_LSPACE_ATTR(_flags) \
(NS_MATHML_OPERATOR_LSPACE_ATTR == ((_flags) & NS_MATHML_OPERATOR_LSPACE_ATTR))
#define NS_MATHML_OPERATOR_HAS_RSPACE_ATTR(_flags) \
(NS_MATHML_OPERATOR_RSPACE_ATTR == ((_flags) & NS_MATHML_OPERATOR_RSPACE_ATTR))
#endif /* nsMathMLOperators_h___ */
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