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Team:XMU-China/JS/SpryMenuBar/js
From 2012.igem.org
(Difference between revisions)
Revision as of 13:11, 1 August 2012
(function() { // BeginSpryComponent
if (typeof Spry == "undefined") window.Spry = {}; if (!Spry.Widget) Spry.Widget = {};
Spry.BrowserSniff = function() { var b = navigator.appName.toString(); var up = navigator.platform.toString(); var ua = navigator.userAgent.toString();
this.mozilla = this.ie = this.opera = this.safari = false; var re_opera = /Opera.([0-9\.]*)/i; var re_msie = /MSIE.([0-9\.]*)/i; var re_gecko = /gecko/i; var re_safari = /(applewebkit|safari)\/([\d\.]*)/i; var r = false;
if ( (r = ua.match(re_opera))) { this.opera = true; this.version = parseFloat(r[1]); } else if ( (r = ua.match(re_msie))) { this.ie = true; this.version = parseFloat(r[1]); } else if ( (r = ua.match(re_safari))) { this.safari = true; this.version = parseFloat(r[2]); } else if (ua.match(re_gecko)) { var re_gecko_version = /rv:\s*([0-9\.]+)/i; r = ua.match(re_gecko_version); this.mozilla = true; this.version = parseFloat(r[1]); } this.windows = this.mac = this.linux = false;
this.Platform = ua.match(/windows/i) ? "windows" : (ua.match(/linux/i) ? "linux" : (ua.match(/mac/i) ? "mac" : ua.match(/unix/i)? "unix" : "unknown")); this[this.Platform] = true; this.v = this.version;
if (this.safari && this.mac && this.mozilla) { this.mozilla = false; } };
Spry.is = new Spry.BrowserSniff();
// Constructor for Menu Bar
// element should be an ID of an unordered list (- tag)
// preloadImage1 and preloadImage2 are images for the rollover state of a menu
Spry.Widget.MenuBar = function(element, opts)
{
this.init(element, opts);
};
Spry.Widget.MenuBar.prototype.init = function(element, opts)
{
this.element = this.getElement(element);
// represents the current (sub)menu we are operating on
this.currMenu = null;
this.showDelay = 250;
this.hideDelay = 600;
if(typeof document.getElementById == 'undefined' || (navigator.vendor == 'Apple Computer, Inc.' && typeof window.XMLHttpRequest == 'undefined') || (Spry.is.ie && typeof document.uniqueID == 'undefined'))
{
// bail on older unsupported browsers
return;
}
// Fix IE6 CSS images flicker
if (Spry.is.ie && Spry.is.version < 7){
try {
document.execCommand("BackgroundImageCache", false, true);
} catch(err) {}
}
this.upKeyCode = Spry.Widget.MenuBar.KEY_UP;
this.downKeyCode = Spry.Widget.MenuBar.KEY_DOWN;
this.leftKeyCode = Spry.Widget.MenuBar.KEY_LEFT;
this.rightKeyCode = Spry.Widget.MenuBar.KEY_RIGHT;
this.escKeyCode = Spry.Widget.MenuBar.KEY_ESC;
this.hoverClass = 'MenuBarItemHover';
this.subHoverClass = 'MenuBarItemSubmenuHover';
this.subVisibleClass ='MenuBarSubmenuVisible';
this.hasSubClass = 'MenuBarItemSubmenu';
this.activeClass = 'MenuBarActive';
this.isieClass = 'MenuBarItemIE';
this.verticalClass = 'MenuBarVertical';
this.horizontalClass = 'MenuBarHorizontal';
this.enableKeyboardNavigation = true;
this.hasFocus = false;
// load hover images now
if(opts)
{
for(var k in opts)
{
if (typeof this[k] == 'undefined')
{
var rollover = new Image;
rollover.src = opts[k];
}
}
Spry.Widget.MenuBar.setOptions(this, opts);
}
// safari doesn't support tabindex
if (Spry.is.safari)
this.enableKeyboardNavigation = false;
if(this.element)
{
this.currMenu = this.element;
var items = this.element.getElementsByTagName('li');
for(var i=0; i<items.length; i++)
{
if (i > 0 && this.enableKeyboardNavigation)
items[i].getElementsByTagName('a')[0].tabIndex='-1';
this.initialize(items[i], element);
if(Spry.is.ie)
{
this.addClassName(items[i], this.isieClass);
items[i].style.position = "static";
}
}
if (this.enableKeyboardNavigation)
{
var self = this;
this.addEventListener(document, 'keydown', function(e){self.keyDown(e); }, false);
}
if(Spry.is.ie)
{
if(this.hasClassName(this.element, this.verticalClass))
{
this.element.style.position = "relative";
}
var linkitems = this.element.getElementsByTagName('a');
for(var i=0; i<linkitems.length; i++)
{
linkitems[i].style.position = "relative";
}
}
}
};
Spry.Widget.MenuBar.KEY_ESC = 27;
Spry.Widget.MenuBar.KEY_UP = 38;
Spry.Widget.MenuBar.KEY_DOWN = 40;
Spry.Widget.MenuBar.KEY_LEFT = 37;
Spry.Widget.MenuBar.KEY_RIGHT = 39;
Spry.Widget.MenuBar.prototype.getElement = function(ele)
{
if (ele && typeof ele == "string")
return document.getElementById(ele);
return ele;
};
Spry.Widget.MenuBar.prototype.hasClassName = function(ele, className)
{
if (!ele || !className || !ele.className || ele.className.search(new RegExp("\\b" + className + "\\b")) == -1)
{
return false;
}
return true;
};
Spry.Widget.MenuBar.prototype.addClassName = function(ele, className)
{
if (!ele || !className || this.hasClassName(ele, className))
return;
ele.className += (ele.className ? " " : "") + className;
};
Spry.Widget.MenuBar.prototype.removeClassName = function(ele, className)
{
if (!ele || !className || !this.hasClassName(ele, className))
return;
ele.className = ele.className.replace(new RegExp("\\s*\\b" + className + "\\b", "g"), "");
};
// addEventListener for Menu Bar
// attach an event to a tag without creating obtrusive HTML code
Spry.Widget.MenuBar.prototype.addEventListener = function(element, eventType, handler, capture)
{
try
{
if (element.addEventListener)
{
element.addEventListener(eventType, handler, capture);
}
else if (element.attachEvent)
{
element.attachEvent('on' + eventType, handler);
}
}
catch (e) {}
};
// createIframeLayer for Menu Bar
// creates an IFRAME underneath a menu so that it will show above form controls and ActiveX
Spry.Widget.MenuBar.prototype.createIframeLayer = function(menu)
{
var layer = document.createElement('iframe');
layer.tabIndex = '-1';
layer.src = 'javascript:""';
layer.frameBorder = '0';
layer.scrolling = 'no';
menu.parentNode.appendChild(layer);
layer.style.left = menu.offsetLeft + 'px';
layer.style.top = menu.offsetTop + 'px';
layer.style.width = menu.offsetWidth + 'px';
layer.style.height = menu.offsetHeight + 'px';
};
// removeIframeLayer for Menu Bar
// removes an IFRAME underneath a menu to reveal any form controls and ActiveX
Spry.Widget.MenuBar.prototype.removeIframeLayer = function(menu)
{
var layers = ((menu == this.element) ? menu : menu.parentNode).getElementsByTagName('iframe');
while(layers.length > 0)
{
layers[0].parentNode.removeChild(layers[0]);
}
};
// clearMenus for Menu Bar
// root is the top level unordered list (
- tag)
Spry.Widget.MenuBar.prototype.clearMenus = function(root)
{
var menus = root.getElementsByTagName('ul');
for(var i=0; i<menus.length; i++)
this.hideSubmenu(menus[i]);
this.removeClassName(this.element, this.activeClass);
};
// bubbledTextEvent for Menu Bar
// identify bubbled up text events in Safari so we can ignore them
Spry.Widget.MenuBar.prototype.bubbledTextEvent = function()
{
return Spry.is.safari && (event.target == event.relatedTarget.parentNode || (event.eventPhase == 3 && event.target.parentNode == event.relatedTarget));
};
// showSubmenu for Menu Bar
// set the proper CSS class on this menu to show it
Spry.Widget.MenuBar.prototype.showSubmenu = function(menu)
{
if(this.currMenu)
{
this.clearMenus(this.currMenu);
this.currMenu = null;
}
if(menu)
{
this.addClassName(menu, this.subVisibleClass);
if(typeof document.all != 'undefined' && !Spry.is.opera && navigator.vendor != 'KDE')
{
if(!this.hasClassName(this.element, this.horizontalClass) || menu.parentNode.parentNode != this.element)
{
menu.style.top = menu.parentNode.offsetTop + 'px';
}
}
if(Spry.is.ie && Spry.is.version < 7)
{
this.createIframeLayer(menu);
}
}
this.addClassName(this.element, this.activeClass);
};
// hideSubmenu for Menu Bar
// remove the proper CSS class on this menu to hide it
Spry.Widget.MenuBar.prototype.hideSubmenu = function(menu)
{
if(menu)
{
this.removeClassName(menu, this.subVisibleClass);
if(typeof document.all != 'undefined' && !Spry.is.opera && navigator.vendor != 'KDE')
{
menu.style.top = ;
menu.style.left = ;
}
if(Spry.is.ie && Spry.is.version < 7)
this.removeIframeLayer(menu);
}
};
// initialize for Menu Bar
// create event listeners for the Menu Bar widget so we can properly
// show and hide submenus
Spry.Widget.MenuBar.prototype.initialize = function(listitem, element)
{
var opentime, closetime;
var link = listitem.getElementsByTagName('a')[0];
var submenus = listitem.getElementsByTagName('ul');
var menu = (submenus.length > 0 ? submenus[0] : null);
if(menu)
this.addClassName(link, this.hasSubClass);
if(!Spry.is.ie)
{
// define a simple function that comes standard in IE to determine
// if a node is within another node
listitem.contains = function(testNode)
{
// this refers to the list item
if(testNode == null)
return false;
if(testNode == this)
return true;
else
return this.contains(testNode.parentNode);
};
}
// need to save this for scope further down
var self = this;
this.addEventListener(listitem, 'mouseover', function(e){self.mouseOver(listitem, e);}, false);
this.addEventListener(listitem, 'mouseout', function(e){if (self.enableKeyboardNavigation) self.clearSelection(); self.mouseOut(listitem, e);}, false);
if (this.enableKeyboardNavigation)
{
this.addEventListener(link, 'blur', function(e){self.onBlur(listitem);}, false);
this.addEventListener(link, 'focus', function(e){self.keyFocus(listitem, e);}, false);
}
};
Spry.Widget.MenuBar.prototype.keyFocus = function (listitem, e)
{
this.lastOpen = listitem.getElementsByTagName('a')[0];
this.addClassName(this.lastOpen, listitem.getElementsByTagName('ul').length > 0 ? this.subHoverClass : this.hoverClass);
this.hasFocus = true;
};
Spry.Widget.MenuBar.prototype.onBlur = function (listitem)
{
this.clearSelection(listitem);
};
Spry.Widget.MenuBar.prototype.clearSelection = function(el){
//search any intersection with the current open element
if (!this.lastOpen)
return;
if (el)
{
el = el.getElementsByTagName('a')[0];
// check children
var item = this.lastOpen;
while (item != this.element)
{
var tmp = el;
while (tmp != this.element)
{
if (tmp == item)
return;
try{
tmp = tmp.parentNode;
}catch(err){break;}
}
item = item.parentNode;
}
}
var item = this.lastOpen;
while (item != this.element)
{
this.hideSubmenu(item.parentNode);
var link = item.getElementsByTagName('a')[0];
this.removeClassName(link, this.hoverClass);
this.removeClassName(link, this.subHoverClass);
item = item.parentNode;
}
this.lastOpen = false;
};
Spry.Widget.MenuBar.prototype.keyDown = function (e)
{
if (!this.hasFocus)
return;
if (!this.lastOpen)
{
this.hasFocus = false;
return;
}
var e = e|| event;
var listitem = this.lastOpen.parentNode;
var link = this.lastOpen;
var submenus = listitem.getElementsByTagName('ul');
var menu = (submenus.length > 0 ? submenus[0] : null);
var hasSubMenu = (menu) ? true : false;
var opts = [listitem, menu, null, this.getSibling(listitem, 'previousSibling'), this.getSibling(listitem, 'nextSibling')];
if (!opts[3])
opts[2] = (listitem.parentNode.parentNode.nodeName.toLowerCase() == 'li')?listitem.parentNode.parentNode:null;
var found = 0;
switch (e.keyCode){
case this.upKeyCode:
found = this.getElementForKey(opts, 'y', 1);
break;
case this.downKeyCode:
found = this.getElementForKey(opts, 'y', -1);
break;
case this.leftKeyCode:
found = this.getElementForKey(opts, 'x', 1);
break;
case this.rightKeyCode:
found = this.getElementForKey(opts, 'x', -1);
break;
case this.escKeyCode:
case 9:
this.clearSelection();
this.hasFocus = false;
default: return;
}
switch (found)
{
case 0: return;
case 1:
//subopts
this.mouseOver(listitem, e);
break;
case 2:
//parent
this.mouseOut(opts[2], e);
break;
case 3:
case 4:
// left - right
this.removeClassName(link, hasSubMenu ? this.subHoverClass : this.hoverClass);
break;
}
var link = opts[found].getElementsByTagName('a')[0];
if (opts[found].nodeName.toLowerCase() == 'ul')
opts[found] = opts[found].getElementsByTagName('li')[0];
this.addClassName(link, opts[found].getElementsByTagName('ul').length > 0 ? this.subHoverClass : this.hoverClass);
this.lastOpen = link;
opts[found].getElementsByTagName('a')[0].focus();
//stop further event handling by the browser
return Spry.Widget.MenuBar.stopPropagation(e);
};
Spry.Widget.MenuBar.prototype.mouseOver = function (listitem, e)
{
var link = listitem.getElementsByTagName('a')[0];
var submenus = listitem.getElementsByTagName('ul');
var menu = (submenus.length > 0 ? submenus[0] : null);
var hasSubMenu = (menu) ? true : false;
if (this.enableKeyboardNavigation)
this.clearSelection(listitem);
if(this.bubbledTextEvent())
{
// ignore bubbled text events
return;
}
if (listitem.closetime)
clearTimeout(listitem.closetime);
if(this.currMenu == listitem)
{
this.currMenu = null;
}
// move the focus too
if (this.hasFocus)
link.focus();
// show menu highlighting
this.addClassName(link, hasSubMenu ? this.subHoverClass : this.hoverClass);
this.lastOpen = link;
if(menu && !this.hasClassName(menu, this.subHoverClass))
{
var self = this;
listitem.opentime = window.setTimeout(function(){self.showSubmenu(menu);}, this.showDelay);
}
};
Spry.Widget.MenuBar.prototype.mouseOut = function (listitem, e)
{
var link = listitem.getElementsByTagName('a')[0];
var submenus = listitem.getElementsByTagName('ul');
var menu = (submenus.length > 0 ? submenus[0] : null);
var hasSubMenu = (menu) ? true : false;
if(this.bubbledTextEvent())
{
// ignore bubbled text events
return;
}
var related = (typeof e.relatedTarget != 'undefined' ? e.relatedTarget : e.toElement);
if(!listitem.contains(related))
{
if (listitem.opentime)
clearTimeout(listitem.opentime);
this.currMenu = listitem;
// remove menu highlighting
this.removeClassName(link, hasSubMenu ? this.subHoverClass : this.hoverClass);
if(menu)
{
var self = this;
listitem.closetime = window.setTimeout(function(){self.hideSubmenu(menu);}, this.hideDelay);
}
if (this.hasFocus)
link.blur();
}
};
Spry.Widget.MenuBar.prototype.getSibling = function(element, sibling)
{
var child = element[sibling];
while (child && child.nodeName.toLowerCase() !='li')
child = child[sibling];
return child;
};
Spry.Widget.MenuBar.prototype.getElementForKey = function(els, prop, dir)
{
var found = 0;
var rect = Spry.Widget.MenuBar.getPosition;
var ref = rect(els[found]);
var hideSubmenu = false;
//make the subelement visible to compute the position
if (els[1] && !this.hasClassName(els[1], this.MenuBarSubmenuVisible))
{
els[1].style.visibility = 'hidden';
this.showSubmenu(els[1]);
hideSubmenu = true;
}
var isVert = this.hasClassName(this.element, this.verticalClass);
var hasParent = els[0].parentNode.parentNode.nodeName.toLowerCase() == 'li' ? true : false;
for (var i = 1; i < els.length; i++){
//when navigating on the y axis in vertical menus, ignore children and parents
if(prop=='y' && isVert && (i==1 || i==2))
{
continue;
}
//when navigationg on the x axis in the FIRST LEVEL of horizontal menus, ignore children and parents
if(prop=='x' && !isVert && !hasParent && (i==1 || i==2))
{
continue;
}
if (els[i])
{
var tmp = rect(els[i]);
if ( (dir * tmp[prop]) < (dir * ref[prop]))
{
ref = tmp;
found = i;
}
}
}
// hide back the submenu
if (els[1] && hideSubmenu){
this.hideSubmenu(els[1]);
els[1].style.visibility = ;
}
return found;
};
Spry.Widget.MenuBar.camelize = function(str)
{
if (str.indexOf('-') == -1){
return str;
}
var oStringList = str.split('-');
var isFirstEntry = true;
var camelizedString = ;
for(var i=0; i < oStringList.length; i++)
{
if(oStringList[i].length>0)
{
if(isFirstEntry)
{
camelizedString = oStringList[i];
isFirstEntry = false;
}
else
{
var s = oStringList[i];
camelizedString += s.charAt(0).toUpperCase() + s.substring(1);
}
}
}
return camelizedString;
};
Spry.Widget.MenuBar.getStyleProp = function(element, prop)
{
var value;
try
{
if (element.style)
value = element.style[Spry.Widget.MenuBar.camelize(prop)];
if (!value)
if (document.defaultView && document.defaultView.getComputedStyle)
{
var css = document.defaultView.getComputedStyle(element, null);
value = css ? css.getPropertyValue(prop) : null;
}
else if (element.currentStyle)
{
value = element.currentStyle[Spry.Widget.MenuBar.camelize(prop)];
}
}
catch (e) {}
return value == 'auto' ? null : value;
};
Spry.Widget.MenuBar.getIntProp = function(element, prop)
{
var a = parseInt(Spry.Widget.MenuBar.getStyleProp(element, prop),10);
if (isNaN(a))
return 0;
return a;
};
Spry.Widget.MenuBar.getPosition = function(el, doc)
{
doc = doc || document;
if (typeof(el) == 'string') {
el = doc.getElementById(el);
}
if (!el) {
return false;
}
if (el.parentNode === null || Spry.Widget.MenuBar.getStyleProp(el, 'display') == 'none') {
//element must be visible to have a box
return false;
}
var ret = {x:0, y:0};
var parent = null;
var box;
if (el.getBoundingClientRect) { // IE
box = el.getBoundingClientRect();
var scrollTop = doc.documentElement.scrollTop || doc.body.scrollTop;
var scrollLeft = doc.documentElement.scrollLeft || doc.body.scrollLeft;
ret.x = box.left + scrollLeft;
ret.y = box.top + scrollTop;
} else if (doc.getBoxObjectFor) { // gecko
box = doc.getBoxObjectFor(el);
ret.x = box.x;
ret.y = box.y;
} else { // safari/opera
ret.x = el.offsetLeft;
ret.y = el.offsetTop;
parent = el.offsetParent;
if (parent != el) {
while (parent) {
ret.x += parent.offsetLeft;
ret.y += parent.offsetTop;
parent = parent.offsetParent;
}
}
// opera & (safari absolute) incorrectly account for body offsetTop
if (Spry.is.opera || Spry.is.safari && Spry.Widget.MenuBar.getStyleProp(el, 'position') == 'absolute')
ret.y -= doc.body.offsetTop;
}
if (el.parentNode)
parent = el.parentNode;
else
parent = null;
if (parent.nodeName){
var cas = parent.nodeName.toUpperCase();
while (parent && cas != 'BODY' && cas != 'HTML') {
cas = parent.nodeName.toUpperCase();
ret.x -= parent.scrollLeft;
ret.y -= parent.scrollTop;
if (parent.parentNode)
parent = parent.parentNode;
else
parent = null;
}
}
return ret;
};
Spry.Widget.MenuBar.stopPropagation = function(ev)
{
if (ev.stopPropagation)
ev.stopPropagation();
else
ev.cancelBubble = true;
if (ev.preventDefault)
ev.preventDefault();
else
ev.returnValue = false;
};
Spry.Widget.MenuBar.setOptions = function(obj, optionsObj, ignoreUndefinedProps)
{
if (!optionsObj)
return;
for (var optionName in optionsObj)
{
if (ignoreUndefinedProps && optionsObj[optionName] == undefined)
continue;
obj[optionName] = optionsObj[optionName];
}
};
})(); // EndSpryComponent
