gecko/content/smil/nsISMILAnimationElement.h

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 * for the specific language governing rights and limitations under the
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 * The Original Code is the Mozilla SVG project.
 *
 * The Initial Developer of the Original Code is
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 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Daniel Holbert <dholbert@mozilla.com>
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#ifndef NS_ISMILANIMATIONELEMENT_H_
#define NS_ISMILANIMATIONELEMENT_H_

#include "nsISupports.h"

//////////////////////////////////////////////////////////////////////////////
// nsISMILAnimationElement: Interface for elements that control the animation of
// some property of another element, e.g. <animate>, <set>.

#define NS_ISMILANIMATIONELEMENT_IID \
{ 0x5c891601, 0x47aa, 0x4230,        \
  { 0xb8, 0xdc, 0xb9, 0x26, 0xd1, 0xe7, 0xd7, 0xf4 } }

class nsISMILAttr;
class nsSMILAnimationFunction;
class nsSMILTimeContainer;
class nsSMILTimedElement;
class nsIContent;
class nsIAtom;
class nsAttrValue;

enum nsSMILTargetAttrType {
  eSMILTargetAttrType_auto,
  eSMILTargetAttrType_CSS,
  eSMILTargetAttrType_XML
};

class nsISMILAnimationElement : public nsISupports
{
public:
  NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISMILANIMATIONELEMENT_IID)

  /*
   * Returns this element as nsIContent.
   */
  virtual const nsIContent& Content() const = 0;

  /*
   * Non-const version of Content()
   */
  virtual nsIContent& Content() = 0;

  /*
   * Returns the source attribute as an nsAttrValue. The global namespace will
   * be used.
   *
   * (The 'Anim' here and below is largely to avoid conflicts for subclasses
   * that derive from nsGenericElement)
   *
   * @param aName the name of the attr
   * @returns PR_TRUE if the attribute was set (even when set to empty string)
   *          PR_FALSE when not set.
   */
  virtual const nsAttrValue* GetAnimAttr(nsIAtom* aName) const = 0;

  /*
   * Get the current value of an attribute as a string. The global namespace
   * will be used.
   *
   * @param aName the name of the attr
   * @param aResult the value (may legitimately be the empty string) [OUT]
   * @returns PR_TRUE if the attribute was set (even when set to empty string)
   *          PR_FALSE when not set.
   */
  virtual PRBool GetAnimAttr(nsIAtom* aAttName, nsAString& aResult) const = 0;

  /*
   * Check for the presence of an attribute in the global namespace.
   */
  virtual PRBool HasAnimAttr(nsIAtom* aAttName) const = 0;

  /*
   * Returns the target (animated) element.
   */
  virtual nsIContent* GetTargetElementContent() = 0;

  /*
   * Returns the name of the target (animated) attribute or property.
   */
  virtual nsIAtom* GetTargetAttributeName() const = 0;

  /*
   * Returns the type of the target (animated) attribute or property.
   */
  virtual nsSMILTargetAttrType GetTargetAttributeType() const = 0;

  /*
   * Returns the SMIL animation function associated with this animation element.
   *
   * The animation function is owned by the animation element.
   */
  virtual nsSMILAnimationFunction& AnimationFunction() = 0;

  /*
   * Returns the SMIL timed element associated with this animation element.
   *
   * The timed element is owned by the animation element.
   */
  virtual nsSMILTimedElement& TimedElement() = 0;

  /*
   * Returns the SMIL timed container root with which this animation element is
   * associated (if any).
   */
  virtual nsSMILTimeContainer* GetTimeContainer() = 0;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsISMILAnimationElement,
                              NS_ISMILANIMATIONELEMENT_IID)

#endif // NS_ISMILANIMATIONELEMENT_H_