/* -*- 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/. */

#include "nsISupports.idl"

interface nsIDOMElement;
interface nsIDOMNode;
interface nsIDOMEvent;
interface nsIDOMClientRect;

[scriptable, uuid(492861e3-d168-410f-b2bb-6eb8ce503d4a)]
interface nsIPopupBoxObject : nsISupports
{
  /**
   *  This method is deprecated. Use openPopup or openPopupAtScreen instead.
   */
  void showPopup(in nsIDOMElement srcContent, in nsIDOMElement popupContent,
                 in long xpos, in long ypos,
                 in wstring popupType, in wstring anchorAlignment, 
                 in wstring popupAlignment);

  /**
   *  Hide the popup if it is open. The cancel argument is used as a hint that
   *  the popup is being closed because it has been cancelled, rather than
   *  something being selected within the panel.
   *
   * @param cancel if true, then the popup is being cancelled.
   */
  void hidePopup([optional] in bool cancel);

  /** 
   * Allow the popup to automatically position itself.
   */
  attribute boolean autoPosition;

  /**
   * If keyboard navigation is enabled, the keyboard may be used to navigate
   * the menuitems on the popup. Enabling keyboard navigation is the default
   * behaviour and will install capturing key event listeners on the popup
   * that do not propagate key events to the contents. If you wish to place
   * elements in a popup which accept key events, such as textboxes, keyboard
   * navigation should be disabled.
   *
   * Setting ignorekeys="true" on the popup element also disables keyboard
   * navigation, and is recommended over calling this method.
   */
  void enableKeyboardNavigator(in boolean enableKeyboardNavigator);

  /** 
   * Enable automatic popup dismissal. This only has effect when called
   * on an open popup.
   */
  void enableRollup(in boolean enableRollup);

  /**
   * Control whether the event that caused the popup to be automatically
   * dismissed ("rolled up") should be consumed, or dispatched as a
   * normal event.  This should be set immediately before calling showPopup()
   * if non-default behavior is desired.
   */
  const uint32_t ROLLUP_DEFAULT = 0;   /* widget/platform default */
  const uint32_t ROLLUP_CONSUME = 1;   /* consume the rollup event */
  const uint32_t ROLLUP_NO_CONSUME = 2; /* don't consume the rollup event */
  void setConsumeRollupEvent(in uint32_t consume);

  /** 
   * Size the popup to the given dimensions
   */
  void sizeTo(in long width, in long height);

  /**
   * Move the popup to a point on screen in CSS pixels.
   */
  void moveTo(in long left, in long top);

  /**
   * Open the popup relative to a specified node at a specific location.
   *
   * The popup may be either anchored to another node or opened freely.
   * To anchor a popup to a node, supply an anchor node and set the position
   * to a string indicating the manner in which the popup should be anchored.
   * Possible values for position are:
   *    before_start, before_end, after_start, after_end,
   *    start_before, start_after, end_before, end_after,
   *    overlap, after_pointer
   *
   * The anchor node does not need to be in the same document as the popup.
   *
   * If the attributesOverride argument is true, the popupanchor, popupalign
   * and position attributes on the popup node override the position value
   * argument. If attributesOverride is false, the attributes are only used
   * if position is empty.
   *
   * For an anchored popup, the x and y arguments may be used to offset the 
   * popup from its anchored position by some distance, measured in CSS pixels.
   * x increases to the right and y increases down. Negative values may also
   * be used to move to the left and upwards respectively.
   *
   * Unanchored popups may be created by supplying null as the anchor node.
   * An unanchored popup appears at the position specified by x and y,
   * relative to the viewport of the document containing the popup node. In
   * this case, position and attributesOverride are ignored.
   *
   * @param anchorElement the node to anchor the popup to, may be null
   * @param position manner is which to anchor the popup to node
   * @param x horizontal offset
   * @param y vertical offset
   * @param isContextMenu true for context menus, false for other popups
   * @param attributesOverride true if popup node attributes override position
   * @param triggerEvent the event that triggered this popup (mouse click for example)
   */
  void openPopup(in nsIDOMElement anchorElement,
                 in AString position,
                 in long x, in long y,
                 in boolean isContextMenu,
                 in boolean attributesOverride,
                 in nsIDOMEvent triggerEvent);

  /**
   * Open the popup at a specific screen position specified by x and y. This
   * position may be adjusted if it would cause the popup to be off of the
   * screen. The x and y coordinates are measured in CSS pixels, and like all
   * screen coordinates, are given relative to the top left of the primary
   * screen.
   *
   * @param isContextMenu true for context menus, false for other popups
   * @param x horizontal screen position
   * @param y vertical screen position
   * @param triggerEvent the event that triggered this popup (mouse click for example)
   */
  void openPopupAtScreen(in long x, in long y,
                         in boolean isContextMenu,
                         in nsIDOMEvent triggerEvent);

  /**
   * Returns the state of the popup:
   *   closed - the popup is closed
   *   open - the popup is open
   *   showing - the popup is in the process of being shown
   *   hiding - the popup is in the process of being hidden
   */
  readonly attribute AString popupState;

  /**
   * The node that triggered the popup. If the popup is not open, will return
   * null.
   */
  readonly attribute nsIDOMNode triggerNode;

  /**
   * Retrieve the anchor that was specified to openPopup or for menupopups in a
   * menu, the parent menu.
   */
  readonly attribute nsIDOMElement anchorNode;

  /**
   * Retrieve the screen rectangle of the popup, including the area occupied by
   * any titlebar or borders present.
   */
  nsIDOMClientRect getOuterScreenRect();

  /**
   * Move an open popup to the given anchor position. The arguments have the same
   * meaning as the corresponding argument to openPopup. This method has no effect
   * on popups that are not open.
   */
  void moveToAnchor(in nsIDOMElement anchorElement,
                    in AString position,
                    in long x, in long y,
                    in boolean attributesOverride);

  /** Returns the alignment position where the popup has appeared relative to its
   *  anchor node or point, accounting for any flipping that occurred.
   */
  readonly attribute AString alignmentPosition;
  readonly attribute long alignmentOffset;
};

%{C++
class nsIBoxObject;

nsresult
NS_NewPopupBoxObject(nsIBoxObject** aResult);

%}