102 lines
3.7 KiB
C++
102 lines
3.7 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla MathML Project.
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*
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* The Initial Developer of the Original Code is The University Of
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* Queensland. Portions created by The University Of Queensland are
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* Copyright (C) 1999 The University Of Queensland. All Rights Reserved.
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*
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* Contributor(s):
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* Roger B. Sidje <rbs@maths.uq.edu.au>
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*/
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#ifndef nsMathMLOperators_h___
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#define nsMathMLOperators_h___
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#include "nslayout.h"
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#include "nsCoord.h"
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typedef PRUint32 nsOperatorFlags;
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// define the bits used to handle the operator
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#define NS_MATHML_OPERATOR_MUTABLE 0x80000000 // the very first bit
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// define the bits used in the operator dictionary
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#define NS_MATHML_OPERATOR_FORM 0x3 // the very last two bits tell us the form
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#define NS_MATHML_OPERATOR_FORM_INFIX 1
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#define NS_MATHML_OPERATOR_FORM_PREFIX 2
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#define NS_MATHML_OPERATOR_FORM_POSTFIX 3
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#define NS_MATHML_OPERATOR_STRETCHY (1<<2)
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#define NS_MATHML_OPERATOR_FENCE (1<<3)
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#define NS_MATHML_OPERATOR_ACCENT (1<<4)
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#define NS_MATHML_OPERATOR_LARGEOP (1<<5)
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#define NS_MATHML_OPERATOR_SEPARATOR (1<<6)
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#define NS_MATHML_OPERATOR_MOVABLELIMITS (1<<7)
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// Macros that retrieve those bits
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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_GET_FORM(_flags) \
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((_flags) & NS_MATHML_OPERATOR_FORM)
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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_INFIX))
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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_PREFIX))
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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_POSTFIX ))
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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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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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// 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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static PRBool LookupOperator(const nsStr& aOperator,
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const nsOperatorFlags aForm,
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nsOperatorFlags* aFlags,
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float* aLeftSpace,
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float* aRightSpace);
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};
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#endif /* nsMathMLOperators_h___ */
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