1 files changed, 89 insertions, 0 deletions
diff --git a/dom/smil/nsSMILParserUtils.h b/dom/smil/nsSMILParserUtils.h
new file mode 100644
index 000000000..c80fd98a2
--- /dev/null
+++ b/dom/smil/nsSMILParserUtils.h
@@ -0,0 +1,89 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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_