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 * the License. You may obtain a copy of the License at
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 *
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
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 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *
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#include "nsISupports.idl"

/**
 * nsIDOMWindowUtils is intended for infrequently-used methods related
 * to the current nsIDOMWindow.  Some of the methods may require
 * elevated privileges; the method implementations should contain the
 * necessary security checks.  Access this interface by calling
 * getInterface on a DOMWindow.
 */

interface nsIDOMElement;

[scriptable, uuid(1cfc1a0a-e348-4b18-b61b-935c192f85c4)]
interface nsIDOMWindowUtils : nsISupports {

  /**
   * Image animation mode of the window. When this attribute's value
   * is changed, the implementation should set all images in the window
   * to the given value. That is, when set to kDontAnimMode, all images
   * will stop animating. The attribute's value must be one of the
   * animationMode values from imgIContainer.
   * @note Images may individually override the window's setting after
   *       the window's mode is set. Therefore images given different modes
   *       since the last setting of the window's mode may behave
   *       out of line with the window's overall mode.
   * @note The attribute's value is the window's overall mode. It may
   *       for example continue to report kDontAnimMode after all images
   *       have subsequently been individually animated.
   * @note Only images immediately in this window are affected;
   *       this is not recursive to subwindows.
   * @see imgIContainer
   */
  attribute unsigned short imageAnimationMode;

  /**
   * Whether the charset of the window's current document has been forced by
   * the user.
   * Cannot be accessed from unprivileged context (not content-accessible)
   */
  readonly attribute boolean docCharsetIsForced;

  /**
   * Function to get metadata associated with the window's current document
   * @param aName the name of the metadata.  This should be all lowercase.
   * @return the value of the metadata, or the empty string if it's not set
   *
   * Will throw a DOM security error if called without UniversalXPConnect
   * privileges.
   */
  AString getDocumentMetadata(in AString aName);

  /**
   * Force an immediate redraw of this window.
   */
  void redraw();

  /** Synthesize a mouse event for a window. The event types supported
   *  are: 
   *    mousedown, mouseup, mousemove, mouseover, mouseout, contextmenu
   *
   * Events are sent in coordinates offset by aX and aY from the window.
   *
   * Note that additional events may be fired as a result of this call. For
   * instance, typically a click event will be fired as a result of a
   * mousedown and mouseup in sequence.
   *
   * Normally at this level of events, the mouseover and mouseout events are
   * only fired when the window is entered or exited. For inter-element
   * mouseover and mouseout events, a movemove event fired on the new element
   * should be sufficient to generate the correct over and out events as well.
   *
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without UniversalXPConnect
   * privileges.
   *
   * @param aType event type
   * @param aX x offset
   * @param aY y offset
   * @param aButton button to synthesize
   * @param aClickCount number of clicks that have been performed
   * @param aModifiers modifiers pressed, using constants defined in nsIDOMNSEvent
   */
  void sendMouseEvent(in AString aType,
                      in long aX,
                      in long aY,
                      in long aButton,
                      in long aClickCount,
                      in long aModifiers);

  /**
   * Synthesize a key event to the window. The event types supported are:
   *   keydown, keyup, keypress
   *
   * Key events generally end up being sent to the focused node.
   *
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without UniversalXPConnect
   * privileges.
   *
   * @param aType event type
   * @param aKeyCode key code
   * @param aCharCode character code
   * @param aModifiers modifiers pressed, using constants defined in nsIDOMNSEvent
   */
  void sendKeyEvent(in AString aType,
                    in long aKeyCode,
                    in long aCharCode,
                    in long aModifiers);

  /**
   * See nsIWidget::SynthesizeNativeKeyEvent
   *
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without UniversalXPConnect
   * privileges.
   */
  void sendNativeKeyEvent(in long aNativeKeyboardLayout,
                          in long aNativeKeyCode,
                          in long aModifierFlags,
                          in AString aCharacters,
                          in AString aUnmodifiedCharacters);

  /**
   * Focus the element aElement. The element should be in the same document
   * that the window is displaying. Pass null to blur the element, if any,
   * that currently has focus, and focus the document.
   *
   * Cannot be accessed from unprivileged context (not content-accessible)
   * Will throw a DOM security error if called without UniversalXPConnect
   * privileges.
   *
   * @param aElement the element to focus
   */
  void focus(in nsIDOMElement aElement);

  /**
   * Force a garbage collection. This will run the cycle-collector twice to
   * make sure all garbage is collected.
   *
   * Will throw a DOM security error if called without UniversalXPConnect
   * privileges in non-debug builds. Available to all callers in debug builds.
   */
  void garbageCollect();
};