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/* -*- Mode: C++; tab-width: 8; 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 NS_SMILPARSERUTILS_H_
#define NS_SMILPARSERUTILS_H_
#include "nsTArray.h"
#include "nsStringFwd.h"
class nsISMILAttr;
class nsSMILKeySpline;
class nsSMILTimeValue;
class nsSMILValue;
class nsSMILRepeatCount;
class nsSMILTimeValueSpecParams;
namespace mozilla {
namespace dom {
class SVGAnimationElement;
} // namespace dom
} // namespace mozilla
/**
* Common parsing utilities for the SMIL module. There is little re-use here; it
* simply serves to simplify other classes by moving parsing outside and to aid
* unit testing.
*/
class nsSMILParserUtils
{
public:
// Abstract helper-class for assisting in parsing |values| attribute
class MOZ_STACK_CLASS GenericValueParser {
public:
virtual bool Parse(const nsAString& aValueStr) = 0;
};
static const nsDependentSubstring TrimWhitespace(const nsAString& aString);
static bool ParseKeySplines(const nsAString& aSpec,
FallibleTArray<nsSMILKeySpline>& aKeySplines);
// Used for parsing the |keyTimes| and |keyPoints| attributes.
static bool ParseSemicolonDelimitedProgressList(const nsAString& aSpec,
bool aNonDecreasing,
FallibleTArray<double>& aArray);
static bool ParseValues(const nsAString& aSpec,
const mozilla::dom::SVGAnimationElement* aSrcElement,
const nsISMILAttr& aAttribute,
FallibleTArray<nsSMILValue>& aValuesArray,
bool& aPreventCachingOfSandwich);
// Generic method that will run some code on each sub-section of an animation
// element's "values" list.
static bool ParseValuesGeneric(const nsAString& aSpec,
GenericValueParser& aParser);
static bool ParseRepeatCount(const nsAString& aSpec,
nsSMILRepeatCount& aResult);
static bool ParseTimeValueSpecParams(const nsAString& aSpec,
nsSMILTimeValueSpecParams& aResult);
/*
* Parses a clock value as defined in the SMIL Animation specification.
* If parsing succeeds the returned value will be a non-negative, definite
* time value i.e. IsDefinite will return true.
*
* @param aSpec The string containing a clock value, e.g. "10s"
* @param aResult The parsed result. [OUT]
* @return true if parsing succeeded, otherwise false.
*/
static bool ParseClockValue(const nsAString& aSpec,
nsSMILTimeValue* aResult);
/*
* This method checks whether the given string looks like a negative number.
* Specifically, it checks whether the string looks matches the pattern
* "[whitespace]*-[numeral].*" If the string matches this pattern, this
* method returns the index of the first character after the '-' sign
* (i.e. the index of the absolute value). If not, this method returns -1.
*/
static int32_t CheckForNegativeNumber(const nsAString& aStr);
};
#endif // NS_SMILPARSERUTILS_H_
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