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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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tree10027f336435511475e392454359edea8e25895d /layout/mathml/nsMathMLOperators.h
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Add m-esr52 at 52.6.0
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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___ */