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242 lines
9.8 KiB
C++
242 lines
9.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* The University Of Queensland.
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* Portions created by the Initial Developer are Copyright (C) 1999
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* the Initial Developer. 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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* Karl Tomlinson <karlt+@karlt.net>, Mozilla Corporation
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsMathMLOperators_h___
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#define nsMathMLOperators_h___
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#include "nsCoord.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 PRUint32 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 stretchiness
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NS_MATHML_OPERATOR_STRETCHY = 0xC,
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NS_MATHML_OPERATOR_STRETCHY_VERT = 1<<2,
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NS_MATHML_OPERATOR_STRETCHY_HORIZ = 1<<3,
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// other bits used in the Operator Dictionary
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NS_MATHML_OPERATOR_FENCE = 1<<4,
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NS_MATHML_OPERATOR_ACCENT = 1<<5,
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NS_MATHML_OPERATOR_LARGEOP = 1<<6,
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NS_MATHML_OPERATOR_SEPARATOR = 1<<7,
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NS_MATHML_OPERATOR_MOVABLELIMITS = 1<<8,
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NS_MATHML_OPERATOR_SYMMETRIC = 1<<9,
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// Additional bits not stored in the dictionary
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NS_MATHML_OPERATOR_MINSIZE_ABSOLUTE = 1<<10,
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NS_MATHML_OPERATOR_MAXSIZE_ABSOLUTE = 1<<11,
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NS_MATHML_OPERATOR_LEFTSPACE_ATTR = 1<<12,
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NS_MATHML_OPERATOR_RIGHTSPACE_ATTR = 1<<13
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};
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#define NS_MATHML_OPERATOR_SIZE_INFINITY NS_IEEEPositiveInfinity()
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// Style invariant chararacters (chars have their own intrinsic predefined style)
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enum eMATHVARIANT {
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eMATHVARIANT_NONE = -1,
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eMATHVARIANT_normal = 0,
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eMATHVARIANT_bold,
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eMATHVARIANT_italic,
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eMATHVARIANT_bold_italic,
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eMATHVARIANT_sans_serif,
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eMATHVARIANT_bold_sans_serif,
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eMATHVARIANT_sans_serif_italic,
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eMATHVARIANT_sans_serif_bold_italic,
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eMATHVARIANT_monospace,
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eMATHVARIANT_script,
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eMATHVARIANT_bold_script,
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eMATHVARIANT_fraktur,
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eMATHVARIANT_bold_fraktur,
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eMATHVARIANT_double_struck,
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eMATHVARIANT_COUNT
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};
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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 PRBool
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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* aLeftSpace,
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float* aRightSpace);
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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}], aLeftSpace[], etc,
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// to access the attributes of the operator under a particular form. If the
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// operator wasn't found under a form, its entry 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* aLeftSpace,
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float* aRightSpace);
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// IsMutableOperator:
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// Return true if the operator exists and is stretchy or largeop
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static PRBool
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IsMutableOperator(const nsString& aOperator);
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// Helper functions for stretchy operators. These are used by the
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// nsMathMLChar class.
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static PRInt32 CountStretchyOperator();
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static PRInt32 FindStretchyOperator(PRUnichar aOperator);
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static nsStretchDirection GetStretchyDirectionAt(PRInt32 aIndex);
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static void DisableStretchyOperatorAt(PRInt32 aIndex);
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// Return the variant type of one Unicode Mathematical Alphanumeric Symbol
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// character (which may be represented by a surrogate pair), or return
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// eMATHVARIANT_NONE if aChar is not such a character.
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static eMATHVARIANT LookupInvariantChar(const nsAString& aChar);
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// Return the styled Mathematical Alphanumeric Symbol character
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// corresponding to a BMP character and a mathvariant value, or return aChar
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// if there is no such corresponding character.
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// Note the result may be dependent on aChar, and should be considered a
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// temporary.
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static const nsDependentSubstring
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TransformVariantChar(const PRUnichar& aChar, eMATHVARIANT aVariant);
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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_STRETCHY_DIR(_flags) \
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((_flags) & NS_MATHML_OPERATOR_STRETCHY)
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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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(0 != ((_flags) & NS_MATHML_OPERATOR_STRETCHY))
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#define NS_MATHML_OPERATOR_IS_STRETCHY_VERT(_flags) \
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(NS_MATHML_OPERATOR_STRETCHY_VERT == ((_flags) & NS_MATHML_OPERATOR_STRETCHY_VERT))
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#define NS_MATHML_OPERATOR_IS_STRETCHY_HORIZ(_flags) \
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(NS_MATHML_OPERATOR_STRETCHY_HORIZ == ((_flags) & NS_MATHML_OPERATOR_STRETCHY_HORIZ))
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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_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_LEFTSPACE_ATTR(_flags) \
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(NS_MATHML_OPERATOR_LEFTSPACE_ATTR == ((_flags) & NS_MATHML_OPERATOR_LEFTSPACE_ATTR))
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#define NS_MATHML_OPERATOR_HAS_RIGHTSPACE_ATTR(_flags) \
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(NS_MATHML_OPERATOR_RIGHTSPACE_ATTR == ((_flags) & NS_MATHML_OPERATOR_RIGHTSPACE_ATTR))
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#endif /* nsMathMLOperators_h___ */
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