gecko-dev/layout/mathml/nsMathMLOperators.h

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9.9 KiB
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla MathML Project.
*
* The Initial Developer of the Original Code is
* The University Of Queensland.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Roger B. Sidje <rbs@maths.uq.edu.au>
* Karl Tomlinson <karlt+@karlt.net>, Mozilla Corporation
* Frederic Wang <fred.wang@free.fr>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsMathMLOperators_h___
#define nsMathMLOperators_h___
#include "nsCoord.h"
enum nsStretchDirection {
NS_STRETCH_DIRECTION_UNSUPPORTED = -1,
NS_STRETCH_DIRECTION_DEFAULT = 0,
NS_STRETCH_DIRECTION_HORIZONTAL = 1,
NS_STRETCH_DIRECTION_VERTICAL = 2
};
typedef PRUint32 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,
// Additional bits not stored in the dictionary
NS_MATHML_OPERATOR_MINSIZE_ABSOLUTE = 1<<11,
NS_MATHML_OPERATOR_MAXSIZE_ABSOLUTE = 1<<12,
NS_MATHML_OPERATOR_LEFTSPACE_ATTR = 1<<13,
NS_MATHML_OPERATOR_RIGHTSPACE_ATTR = 1<<14
};
#define NS_MATHML_OPERATOR_SIZE_INFINITY NS_IEEEPositiveInfinity()
// Style invariant characters (chars have their own intrinsic predefined style)
enum eMATHVARIANT {
eMATHVARIANT_NONE = -1,
eMATHVARIANT_normal = 0,
eMATHVARIANT_bold,
eMATHVARIANT_italic,
eMATHVARIANT_bold_italic,
eMATHVARIANT_sans_serif,
eMATHVARIANT_bold_sans_serif,
eMATHVARIANT_sans_serif_italic,
eMATHVARIANT_sans_serif_bold_italic,
eMATHVARIANT_monospace,
eMATHVARIANT_script,
eMATHVARIANT_bold_script,
eMATHVARIANT_fraktur,
eMATHVARIANT_bold_fraktur,
eMATHVARIANT_double_struck,
eMATHVARIANT_COUNT
};
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 PRBool
LookupOperator(const nsString& aOperator,
const nsOperatorFlags aForm,
nsOperatorFlags* aFlags,
float* aLeftSpace,
float* aRightSpace);
// 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}], aLeftSpace[], 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* aLeftSpace,
float* aRightSpace);
// IsMutableOperator:
// Return true if the operator exists and is stretchy or largeop
static PRBool
IsMutableOperator(const nsString& aOperator);
// Helper functions for stretchy operators. These are used by the
// nsMathMLChar class.
static PRInt32 CountStretchyOperator();
static PRInt32 FindStretchyOperator(PRUnichar aOperator);
static nsStretchDirection GetStretchyDirectionAt(PRInt32 aIndex);
static void DisableStretchyOperatorAt(PRInt32 aIndex);
// Return the variant type of one Unicode Mathematical Alphanumeric Symbol
// character (which may be represented by a surrogate pair), or return
// eMATHVARIANT_NONE if aChar is not such a character.
static eMATHVARIANT LookupInvariantChar(const nsAString& aChar);
// Return the styled Mathematical Alphanumeric Symbol character
// corresponding to a BMP character and a mathvariant value, or return aChar
// if there is no such corresponding character.
// Note the result may be dependent on aChar, and should be considered a
// temporary.
static const nsDependentSubstring
TransformVariantChar(const PRUnichar& aChar, eMATHVARIANT aVariant);
};
////////////////////////////////////////////////////////////////////////////
// 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_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_LEFTSPACE_ATTR(_flags) \
(NS_MATHML_OPERATOR_LEFTSPACE_ATTR == ((_flags) & NS_MATHML_OPERATOR_LEFTSPACE_ATTR))
#define NS_MATHML_OPERATOR_HAS_RIGHTSPACE_ATTR(_flags) \
(NS_MATHML_OPERATOR_RIGHTSPACE_ATTR == ((_flags) & NS_MATHML_OPERATOR_RIGHTSPACE_ATTR))
#endif /* nsMathMLOperators_h___ */