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