source: Dev/trunk/src/client/dijit/_base/place.js

define([
        "dojo/_base/array", // array.forEach
        "dojo/_base/lang", // lang.isArray, lang.mixin
        "dojo/window", // windowUtils.getBox
        "../place",
        "../main"       // export to dijit namespace
], function(array, lang, windowUtils, place, dijit){

        // module:
        //              dijit/_base/place


        var exports = {
                // summary:
                //              Deprecated back compatibility module, new code should use dijit/place directly instead of using this module.
        };

        exports.getViewport = function(){
                // summary:
                //              Deprecated method to return the dimensions and scroll position of the viewable area of a browser window.
                //              New code should use windowUtils.getBox()

                return windowUtils.getBox();
        };

        exports.placeOnScreen = place.at;

        exports.placeOnScreenAroundElement = function(node, aroundNode, aroundCorners, layoutNode){
                // summary:
                //              Like dijit.placeOnScreenAroundNode(), except it accepts an arbitrary object
                //              for the "around" argument and finds a proper processor to place a node.
                //              Deprecated, new code should use dijit/place.around() instead.

                // Convert old style {"BL": "TL", "BR": "TR"} type argument
                // to style needed by dijit.place code:
                //              [
                //                      {aroundCorner: "BL", corner: "TL" },
                //                      {aroundCorner: "BR", corner: "TR" }
                //              ]
                var positions;
                if(lang.isArray(aroundCorners)){
                        positions = aroundCorners;
                }else{
                        positions = [];
                        for(var key in aroundCorners){
                                positions.push({aroundCorner: key, corner: aroundCorners[key]});
                        }
                }

                return place.around(node, aroundNode, positions, true, layoutNode);
        };

        exports.placeOnScreenAroundNode = exports.placeOnScreenAroundElement;
        /*=====
        exports.placeOnScreenAroundNode = function(node, aroundNode, aroundCorners, layoutNode){
                // summary:
                //              Position node adjacent or kitty-corner to aroundNode
                //              such that it's fully visible in viewport.
                //              Deprecated, new code should use dijit/place.around() instead.
        };
        =====*/

        exports.placeOnScreenAroundRectangle = exports.placeOnScreenAroundElement;
        /*=====
        exports.placeOnScreenAroundRectangle = function(node, aroundRect, aroundCorners, layoutNode){
                // summary:
                //              Like dijit.placeOnScreenAroundNode(), except that the "around"
                //              parameter is an arbitrary rectangle on the screen (x, y, width, height)
                //              instead of a dom node.
                //              Deprecated, new code should use dijit/place.around() instead.
        };
        =====*/

        exports.getPopupAroundAlignment = function(/*Array*/ position, /*Boolean*/ leftToRight){
                // summary:
                //              Deprecated method, unneeded when using dijit/place directly.
                //              Transforms the passed array of preferred positions into a format suitable for
                //              passing as the aroundCorners argument to dijit/place.placeOnScreenAroundElement.
                // position: String[]
                //              This variable controls the position of the drop down.
                //              It's an array of strings with the following values:
                //
                //              - before: places drop down to the left of the target node/widget, or to the right in
                //                the case of RTL scripts like Hebrew and Arabic
                //              - after: places drop down to the right of the target node/widget, or to the left in
                //                the case of RTL scripts like Hebrew and Arabic
                //              - above: drop down goes above target node
                //              - below: drop down goes below target node
                //
                //              The list is positions is tried, in order, until a position is found where the drop down fits
                //              within the viewport.
                // leftToRight: Boolean
                //              Whether the popup will be displaying in leftToRight mode.

                var align = {};
                array.forEach(position, function(pos){
                        var ltr = leftToRight;
                        switch(pos){
                                case "after":
                                        align[leftToRight ? "BR" : "BL"] = leftToRight ? "BL" : "BR";
                                        break;
                                case "before":
                                        align[leftToRight ? "BL" : "BR"] = leftToRight ? "BR" : "BL";
                                        break;
                                case "below-alt":
                                        ltr = !ltr;
                                        // fall through
                                case "below":
                                        // first try to align left borders, next try to align right borders (or reverse for RTL mode)
                                        align[ltr ? "BL" : "BR"] = ltr ? "TL" : "TR";
                                        align[ltr ? "BR" : "BL"] = ltr ? "TR" : "TL";
                                        break;
                                case "above-alt":
                                        ltr = !ltr;
                                        // fall through
                                case "above":
                                default:
                                        // first try to align left borders, next try to align right borders (or reverse for RTL mode)
                                        align[ltr ? "TL" : "TR"] = ltr ? "BL" : "BR";
                                        align[ltr ? "TR" : "TL"] = ltr ? "BR" : "BL";
                                        break;
                        }
                });
                return align;
        };

        lang.mixin(dijit, exports);

        /*===== return exports; =====*/
        return dijit;   // for back compat :-(
});