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// Copyright 2006 The Closure Library Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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//      http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS-IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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 * @fileoverview Anchored viewport positioning class with both adjust and
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 *     resize options for the popup.
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 *
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 * @author [email protected] (Emil A Eklund)
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 */
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goog.provide('goog.positioning.MenuAnchoredPosition');
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goog.require('goog.positioning.AnchoredViewportPosition');
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goog.require('goog.positioning.Overflow');
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/**
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 * Encapsulates a popup position where the popup is anchored at a corner of
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 * an element.  The positioning behavior changes based on the values of
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 * opt_adjust and opt_resize.
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 *
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 * When using this positioning object it's recommended that the movable element
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 * be absolutely positioned.
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 *
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 * @param {Element} anchorElement Element the movable element should be
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 *     anchored against.
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 * @param {goog.positioning.Corner} corner Corner of anchored element the
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 *     movable element should be positioned at.
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 * @param {boolean=} opt_adjust Whether the positioning should be adjusted until
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 *     the element fits inside the viewport even if that means that the anchored
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 *     corners are ignored.
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 * @param {boolean=} opt_resize Whether the positioning should be adjusted until
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 *     the element fits inside the viewport on the X axis and its height is
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 *     resized so if fits in the viewport. This take precedence over opt_adjust.
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 * @constructor
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 * @extends {goog.positioning.AnchoredViewportPosition}
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 */
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goog.positioning.MenuAnchoredPosition = function(
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    anchorElement, corner, opt_adjust, opt_resize) {
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  goog.positioning.AnchoredViewportPosition.call(
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      this, anchorElement, corner, opt_adjust || opt_resize);
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  if (opt_adjust || opt_resize) {
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    var overflowX = goog.positioning.Overflow.ADJUST_X_EXCEPT_OFFSCREEN;
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    var overflowY = opt_resize ?
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        goog.positioning.Overflow.RESIZE_HEIGHT :
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        goog.positioning.Overflow.ADJUST_Y_EXCEPT_OFFSCREEN;
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    this.setLastResortOverflow(overflowX | overflowY);
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  }
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};
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goog.inherits(
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    goog.positioning.MenuAnchoredPosition,
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    goog.positioning.AnchoredViewportPosition);
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