/*
 * Copyright(c) 2011
 *     OJC Technologies
 *     all rights reserved
 * @author: Jake Smith
 */


/*
 * Constitues the actual element(s) in the page
 * 
 * s = new PhysicalCursor(element_type_string, id_string, color_string);
 * ...operations with new object... 
 * [s.push(node); var n = s.pop();]
 */
function PhysicalCursor(elemType, idString, colorString) {
    this.contents = null;
    this.element = document.createElement(elemType);
    this.element.setAttribute("id", idString);
    this.element.setAttribute("style", "background-color: " + colorString);
    this.pushErrorMsg = "should not push a textnode into cursor\n"
                + "cursor element already has contents...\n"
                + "pop contents first?";
    
    this.push = function(node) {
        if (this.contents != null) {
            throw new Error(this.pushErrorMsg);
        }
        this.contents = node;
        this.element.appendChild(this.contents);
    }
    
    this.pop = function() {
        var node;
        if (this.contents != null) {
            node = this.contents;
            this.element.removeChild(this.contents);
            this.contents = null;
        }
        return node;
    }
    
    this.invisible = function() {
        var rect;
        rect = this.element.getBoundingClientRect();
        return (rect.width == 0) ? true : false;
    }
    
    //-----------------------//
    //  "Private" functions  //
    //-----------------------//
    
    // N/A
    
} // PhysicalCursor(elemType, idString)