var RightContext = {
    TYPE_MENU: 0,
    TYPE_TEXT: 1,
    TYPE_TEXT_EXT: 2,
    TYPE_SEPERATOR: 3,
    TYPE_ATTRIBUTES: 4,
    menuTriggerEvent: "RIGHT",
    mousePos: {
        x: 0,
        y: 0
    },
    rightOffset: -15,
    allowedContexts: ["a", "div", "span", "input"],
    menuCollection: new Object(),
    contextMenu: null,
    isShowing: false,
    abortKill: false,
    images: new Object(),
    req: null,
    initialize: function(){
        this.attachContextEvents();
    },
    addMenu: function(n, m){
        this.menuCollection[n] = m;
    },
    getMenu: function(n){
        return this.menuCollection[n];
    },
    attachContextEvents: function(){
        var tagContext, thisTag;
        for (var t = 0; t < this.allowedContexts.length; t++) {
            tags = $$('.calendar-table '+this.allowedContexts[t]);
            for (e = 0; e < tags.length; e++) {
                thisTag = tags[e];
                tagContext = thisTag.getAttribute("id");
                if (tagContext != null && tagContext != "undefined") {
                    this.bindEvent('mousemove', tags[e], function(e){
                        return RightContext.locateMousePos(e);
                    });
                    if (this.menuTriggerEvent == "RIGHT") {
                        tags[e].oncontextmenu = function(){
                            return RightContext.render(this);
                        };
                    }
                    else 
                        if (this.menuTriggerEvent == "LEFT") {
                            tags[e].onclick = function(e){
                                RightContext.killBubble(e);
                                return RightContext.render(this)
                            };
                        }
                        else 
                            if (this.menuTriggerEvent == "MOVE") {
                                if (!document.all) {
                                    this.bindEvent('mouseover', tags[e], function(e){
                                        RightContext.locateMousePos(e);
                                        return RightContext.render(this);
                                    });
                                    this.bindEvent('mouseout', tags[e], function(e){
                                        setTimeout("RightContext.killMenu()", 10);
                                    });
                                }
                                else {
                                    tags[e].onmouseover = function(e){
                                        RightContext.locateMousePos(e);
                                        return RightContext.render(this);
                                    };
                                    tags[e].onmouseout = function(e){
                                        setTimeout("RightContext.killMenu()", 10);
                                    };
                                }
                            }
                }
            }
        }
    },
    killBubble: function(e){
        if (!e) 
            var e = window.event;
        e.cancelBubble = true;
        if (e.stopPropagation) 
            e.stopPropagation();
    },
    bindEvent: function(evt, obj, act, bubble){
        if (!bubble) 
            bubble = false;
        if (obj.addEventListener) {
            obj.addEventListener(evt, act, bubble);
        }
        else 
            if (obj.attachEvent) {
                obj.attachEvent('on' + evt, act);
            }
    },
    render: function(caller, name){
        var url, title;
        var name = name || caller.getAttribute("id");
        var thisMenu = this.getMenu(name);
        var attributes = thisMenu["attributes"].split(',');
        var items = thisMenu.items;
        var objMap = this.buildAttributeMap(attributes, caller);
        this.killMenu();
        this.buildMenu(caller);
        tbl = document.createElement("TABLE");
        tbl.id = "rcRightContextTable";
        for (var m = 0; m < items.length; m++) {
            switch (items[m]["type"]) {
                case this.TYPE_MENU:
                    if (this.isDisplayed(items[m], objMap)) {
                        this.addMenuItem(items[m], objMap, tbl);
                    }
                    break;
                case this.TYPE_TEXT:
                    text = this.transform(items[m]["text"], objMap);
                    cell = this.addTableCell(tbl, "rcMenuItemText", text);
                    break;
                case this.TYPE_TEXT_EXT:
                    cell = this.addTableCell(tbl, "rcMenuItemTextExt");
                    url = this.transform(items[m]["url"], objMap);
                    // this.request(url,function(){if(RightContext.req.readyState==4&&RightContext.req.status==200){cell.innerHTML=RightContext.req.responseText}});
                    break;
                case this.TYPE_SEPERATOR:
                    cell = this.addTableCell(tbl);
                    cell.appendChild(this.getSeparator());
                    break;
                default:
                    break;
            }
        }
        this.contextMenu.appendChild(tbl);
        this.repositionMenu();
        if (this.menuTriggerEvent == "MOVE") {
            this.bindEvent('mouseout', this.contextMenu, function(e){
                RightContext.abortKill = false;
                setTimeout("RightContext.killMenu()", 10);
            });
            this.bindEvent('mouseover', this.contextMenu, function(e){
                RightContext.abortKill = true;
            });
        }
        else 
            if (this.menuTriggerEvent == "LEFT" || this.menuTriggerEvent == "RIGHT") {
                this.bindEvent('click', document.body, function(e){
                    setTimeout("RightContext.killMenu();", 10);
                }, false);
            }
        this.isShowing = true;
        return false;
    },
    isDisplayed: function(item, objMap){
        var reqVar, reqVal;
        var shown = true;
        if (item["requires"] != null && item["requires"] != "undefined") {
            reqVar = item["requires"][0];
            reqVal = item["requires"][1];
            if (objMap[reqVar] != null && objMap[reqVar] != "undefined") {
                if (objMap[reqVar] != reqVal) {
                    shown = false;
                }
            }
            else {
                shown = false;
            }
        }
        return shown;
    },
    repositionMenu: function(){
        var mPos = this.findPosition(this.contextMenu);
        var mDim = this.getDimensions(this.contextMenu);
        var winHeight = window.innerHeight || document.body.clientHeight;
        var winWidth = window.innerWidth || document.body.clientWidth;
        if (mPos.y + mDim.height > winHeight - 30) {
            this.position(this.contextMenu, mPos.x, mPos.y - mDim.height);
            mPos = this.findPosition(this.contextMenu);
        }
        if (mPos.x + mDim.width > winWidth - 30) {
            this.position(this.contextMenu, mPos.x - mDim.width, mPos.y);
        }
    },
    getSeparator: function(){
        var sep = document.createElement("HR");
        sep.className = "rcMenuSeparator";
        return sep;
    },
    addTableCell: function(table, className, content){
        row = table.insertRow(-1);
        cell = row.insertCell(0);
        if (className) {
            cell.className = className;
            if (content) {
                cell.innerHTML = content;
            }
        }
        return cell;
    },
    addMenuItem: function(item, objMap, tbl){
        var title = this.transform(item["text"], objMap);
        var url, frame, img, imgAlign, itemSrc, tmp, itemAction;
        var cell = this.addTableCell(tbl, "rcMenuItem", title);
        cell.style.cursor = document.all ? 'hand' : 'pointer';
        this.bindEvent('mouseover', cell, function(e){
            this.className = "rcMenuItemHover";
        });
        this.bindEvent('mouseout', cell, function(e){
            this.className = "rcMenuItem";
        });
        if (item["image"] != null && item["image"] != "undefined") {
            imgAlign = (item["align"] != null && item["align"] != "undefined") ? item["align"] : "absmiddle";
            if (this.images[item["image"]] != null && this.images[item["image"]] != "undefined") {
                img = this.images[item["image"]];
            }
            else {
                img = this.loadImage(item["image"]);
            }
            img.align = imgAlign;
            cell.insertBefore(this.images[item["image"]], cell.childNodes[0]);
        }
        if (item["url"] != null && item["url"] != "undefined") {
            url = this.transform(item["url"], objMap);
            frame = false;
            if (item["frame"] != null && item["frame"] != "undefined") {
                frame = item["frame"];
            }
            cell.onclick = function(){
                RightContext.redirect(url, frame);
            }
        }
        else {
            itemAction = item["onclick"];
            try {
                itemSrc = item["onclick"].toString();
                if (itemSrc.indexOf('[') > -1) {
                    itemSrc = this.transform(itemSrc, objMap);
                    if (document.all) {
                        eval('itemAction = ' + itemSrc);
                    }
                    else {
                        itemAction = eval(itemSrc);
                    }
                }
            } 
            catch (e) {
            }
            cell.onclick = itemAction;
        }
    },
    transform: function(str, map){
        var tStr, tmp;
        tStr = str;
        for (p in map) {
            tmp = "[" + p + "]";
            tStr = tStr.replace(tmp, map[p]);
        }
        return tStr;
    },
    getMenuAttributeArray: function(menu){
        for (var i = 0; i < menu.length; i++) {
            if (menu[i].type == this.TYPE_ATTRIBUTES) {
                return menu[i]["attributes"].split(',');
            }
        }
        return new Array(0);
    },
    buildAttributeMap: function(attribs, obj){
        var thisAttr, thisValue;
        var attrMap = new Object();
        for (var a = 0; a < attribs.length; a++) {
            thisAttr = attribs[a];
            thisValue = obj.getAttribute(attribs[a]);
            if (typeof thisValue != "undefined") {
                attrMap[thisAttr] = thisValue;
            }
        }
        return attrMap;
    },
    findPosition: function(obj){
        var lft = 0;
        var top = 0;
        if (obj.offsetParent) {
            lft = obj.offsetLeft;
            top = obj.offsetTop;
            while (obj = obj.offsetParent) {
                lft += obj.offsetLeft;
                top += obj.offsetTop;
            }
        }
        return {
            x: lft,
            y: top
        };
    },
    getDimensions: function(obj){
        var objStyle = obj.style;
        var originalVisibility = objStyle.visibility;
        var originalPosition = objStyle.position;
        var originalDisplay = objStyle.display;
        objStyle.visibility = 'hidden';
        objStyle.position = 'absolute';
        objStyle.display = 'block';
        var originalWidth = obj.clientWidth;
        var originalHeight = obj.clientHeight;
        objStyle.display = originalDisplay;
        objStyle.position = originalPosition;
        objStyle.visibility = originalVisibility;
        return {
            width: originalWidth,
            height: originalHeight
        };
    },
    position: function(obj, x, y){
        obj.style.left = x + 'px';
        obj.style.top = y + 'px';
    },
    buildMenu: function(parent){
        var pos, dim, tbl;
        this.contextMenu = document.createElement("DIV");
        this.contextMenu.id = "rcRightContext";
        this.contextMenu.className = 'rcMenuContainer';
        pos = this.findPosition(parent);
        dim = this.getDimensions(parent);
        // Position context menu depending on browser
        // All browsers
        //this.position(this.contextMenu, /*this.mousePos.x + */this.rightOffset, pos.y + dim.height);
		this.position(this.contextMenu, $(parent).getPosition().x, $(parent).getPosition().y + $(parent).getSize().y);
        // Opera
       /* if (navigator.userAgent.indexOf("opera")) {
            this.position(this.contextMenu, this.mousePos.x + this.rightOffset, pos.y - dim.height);
        }*/
        if (this.menuTriggerEvent == "RIGHT") {
            this.contextMenu.oncontextmenu = function(){
                return false;
            };
        }
        document.body.appendChild(this.contextMenu);
    },
    killMenu: function(){
        if (!this.abortKill && this.isShowing) {
            try {
                rc = this.contextMenu;
                document.body.removeChild(rc);
            } 
            catch (e) {
            }
            this.contextMenu = null;
            this.isShowing = false;
            this.abortKill = false;
        }
    },
    locateMousePos: function(e){
        var posx = 0, posy = 0;
        if (e == null) 
            e = window.event;
        if (e.pageX || e.pageY) {
            posx = e.pageX;
            posy = e.pageY;
        }
        else 
            if (e.clientX || e.clientY) {
                if (document.documentElement.scrollTop) {
                    posx = e.clientX + document.documentElement.scrollLeft;
                    posy = e.clientY + document.documentElement.scrollTop;
                }
                else {
                    posx = e.clientX + document.body.scrollLeft;
                    posy = e.clientY + document.body.scrollTop;
                }
            }
        this.mousePos = {
            x: posx,
            y: posy
        };
    },
    redirect: function(u, frame){
        if (!frame) {
            document.location = u;
        }
        else {
            if (frame == "_blank") {
                w = window.open(u, 'w');
            }
            else {
                window.frames[frame].document.location = u;
            }
        }
    },
    request: function(url, callBack){
        if (window.XMLHttpRequest) {
            this.req = new XMLHttpRequest();
            this.req.onreadystatechange = callBack;
            this.req.open("GET", url, true);
            this.req.send(null);
        }
        else 
            if (window.ActiveXObject) {
                this.req = new ActiveXObject("Microsoft.XMLHTTP");
                if (this.req) {
                    this.req.onreadystatechange = callBack;
                    this.req.open("GET", url, true);
                    this.req.send();
                }
            }
    },
    loadImage: function(url){
        var img = new Image();
        img.src = url;
        img.className = "rcImage";
        this.images[url] = img;
        return img;
    }
};