treemenu.js

来自「视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.」· JavaScript 代码 · 共 641 行 · 第 1/2 页

/**
* Can the browser handle the dynamic menu?
*/
	TreeMenu.prototype.doesMenu = function ()
	{
		return (is_ie4up || is_nav6up || is_gecko);
	}

/**
* Can the browser handle save the branch status
*/
	TreeMenu.prototype.doesPersistence = function ()
	{
		return (is_ie4up || is_gecko || is_nav6up);
	}

/**
* Returns the appropriate layer accessor
*/
	TreeMenu.prototype.getLayer = function (layerID)
	{
		if (is_ie4) {
			return document.all(layerID);
	
		} else if (document.getElementById(layerID)) {
			return document.getElementById(layerID);
	
		} else if (document.all(layerID)) {
			return document.all(layerID);
		}
	}

/**
* Save the status of the layer
*/
	TreeMenu.prototype.setExpandedStatusForCookie = function (layerID, expanded)
	{
		this.cookieStatuses[layerID] = expanded;
		this.saveCookie();
	}

/**
* Load the status of the layer
*/
	TreeMenu.prototype.getExpandedStatusFromCookie = function (layerID)
	{
		if (this.cookieStatuses[layerID]) {
			return this.cookieStatuses[layerID];
		}

		return false;
	}

/**
* Saves the cookie that holds which branches are expanded.
* Only saves the details of the branches which are expanded.
*/
	TreeMenu.prototype.saveCookie = function ()
	{
		var cookieString = new Array();

		for (var i in this.cookieStatuses) {
			if (this.cookieStatuses[i] == true) {
				cookieString[cookieString.length] = i;
			}
		}
		
		document.cookie = 'TreeMenuBranchStatus=' + cookieString.join(':');
	}

/**
* Reads cookie parses it for status info and
* stores that info in the class member.
*/
	TreeMenu.prototype.loadCookie = function ()
	{
		var cookie = document.cookie.split('; ');

		for (var i=0; i < cookie.length; i++) {
			var crumb = cookie[i].split('=');
			if ('TreeMenuBranchStatus' == crumb[0] && crumb[1]) {
				var expandedBranches = crumb[1].split(':');
				for (var j=0; j<expandedBranches.length; j++) {
					this.cookieStatuses[expandedBranches[j]] = true;
				}
			}
		}
	}

/**
* Reset branch status
*/
	TreeMenu.prototype.resetBranches = function ()
	{
		if (!this.doesPersistence()) {
			return false;
		}

		this.loadCookie();

		for (var i=0; i<this.branches.length; i++) {
			var status = this.getExpandedStatusFromCookie(this.branches[i]);
			// Only update if it's supposed to be expanded and it's not already
			if (status == true && this.branchStatus[this.branches[i]] != true) {
				if (this.checkParentVisibility(this.branches[i])) {
					this.toggleBranch(this.branches[i], true, false);
				} else {
					this.branchStatus[this.branches[i]] = true;
					this.swapImage(this.branches[i]);
				}
			}
		}
	}

/**
* Checks whether a branch should be open 
* or not based on its parents' status
*/
	TreeMenu.prototype.checkParentVisibility = function (layerID)
	{
		if (this.in_array(this.childParents[layerID], this.branches)
		    && this.branchStatus[this.childParents[layerID]]
			&& this.checkParentVisibility(this.childParents[layerID]) ) {
			
			return true;
	
		} else if (this.childParents[layerID] == null) {
			return true;
		}
		
		return false;
	}

/**
* New C# style string formatter
*/
	TreeMenu.prototype.stringFormat = function (strInput)
	{
		var idx = 0;
	
		for (var i=1; i<arguments.length; i++) {
			while ((idx = strInput.indexOf('{' + (i - 1) + '}', idx)) != -1) {
				strInput = strInput.substring(0, idx) + arguments[i] + strInput.substr(idx + 3);
			}
		}
		
		return strInput;
	}

/**
* Also much adored, the PHP implode() function
*/
	TreeMenu.prototype.implode = function (seperator, input)
	{
		var output = '';
	
		for (var i=0; i<input.length; i++) {
			if (i == 0) {
				output += input[i];
			} else {
				output += seperator + input[i];
			}
		}
		
		return output;
	}

/**
* Aah, all the old favourites are coming out...
*/
	TreeMenu.prototype.in_array = function (item, arr)
	{
		for (var i=0; i<arr.length; i++) {
			if (arr[i] == item) {
				return true;
			}
		}
	
		return false;
	}

/**
* TreeNode Class
*/
	function TreeNode(title, icon, link, expanded, isDynamic, cssClass)
	{
		this.title      = title;
		this.icon       = icon;
		this.link       = link;
		this.expanded   = expanded;
		this.isDynamic  = isDynamic;
		this.cssClass   = cssClass;
		this.n          = new Array();
		this.events     = new Array();
		this.handlers   = null;
		this.oncollapse = null;
		this.onexpand   = null;
		this.ontoggle   = null;
	}

/**
* Adds a node to an already existing node
*/
	TreeNode.prototype.addItem = function (newNode)
	{
		newIndex = this.n.length;
		this.n[newIndex] = newNode;
		
		return this.n[newIndex];
	}

/**
* Sets an event for this particular node
*/
	TreeNode.prototype.setEvent = function (eventName, eventHandler)
	{
		switch (eventName.toLowerCase()) {
			case 'onexpand':
				this.onexpand = eventHandler;
				break;

			case 'oncollapse':
				this.oncollapse = eventHandler;
				break;

			case 'ontoggle':
				this.ontoggle = eventHandler;
				break;

			default:
				this.events[eventName] = eventHandler;
		}
	}

/**
* That's the end of the tree classes. What follows is
* the browser detection code.
*/
	

//<!--
// Ultimate client-side JavaScript client sniff. Version 3.03
// (C) Netscape Communications 1999-2001.  Permission granted to reuse and distribute.
// Revised 17 May 99 to add is_nav5up and is_ie5up (see below).
// Revised 20 Dec 00 to add is_gecko and change is_nav5up to is_nav6up
//                      also added support for IE5.5 Opera4&5 HotJava3 AOLTV
// Revised 22 Feb 01 to correct Javascript Detection for IE 5.x, Opera 4, 
//                      correct Opera 5 detection
//                      add support for winME and win2k
//                      synch with browser-type-oo.js
// Revised 26 Mar 01 to correct Opera detection
// Revised 02 Oct 01 to add IE6 detection

// Everything you always wanted to know about your JavaScript client
// but were afraid to ask. Creates "is_" variables indicating:
// (1) browser vendor:
//     is_nav, is_ie, is_opera, is_hotjava, is_webtv, is_TVNavigator, is_AOLTV
// (2) browser version number:
//     is_major (integer indicating major version number: 2, 3, 4 ...)
//     is_minor (float   indicating full  version number: 2.02, 3.01, 4.04 ...)
// (3) browser vendor AND major version number
//     is_nav2, is_nav3, is_nav4, is_nav4up, is_nav6, is_nav6up, is_gecko, is_ie3,
//     is_ie4, is_ie4up, is_ie5, is_ie5up, is_ie5_5, is_ie5_5up, is_ie6, is_ie6up, is_hotjava3, is_hotjava3up,
//     is_opera2, is_opera3, is_opera4, is_opera5, is_opera5up
// (4) JavaScript version number:
//     is_js (float indicating full JavaScript version number: 1, 1.1, 1.2 ...)
// (5) OS platform and version:
//     is_win, is_win16, is_win32, is_win31, is_win95, is_winnt, is_win98, is_winme, is_win2k
//     is_os2
//     is_mac, is_mac68k, is_macppc
//     is_unix
//     is_sun, is_sun4, is_sun5, is_suni86
//     is_irix, is_irix5, is_irix6
//     is_hpux, is_hpux9, is_hpux10
//     is_aix, is_aix1, is_aix2, is_aix3, is_aix4
//     is_linux, is_sco, is_unixware, is_mpras, is_reliant
//     is_dec, is_sinix, is_freebsd, is_bsd
//     is_vms
//
// See http://www.it97.de/JavaScript/JS_tutorial/bstat/navobj.html and
// http://www.it97.de/JavaScript/JS_tutorial/bstat/Browseraol.html
// for detailed lists of userAgent strings.
//
// Note: you don't want your Nav4 or IE4 code to "turn off" or
// stop working when new versions of browsers are released, so
// in conditional code forks, use is_ie5up ("IE 5.0 or greater") 
// is_opera5up ("Opera 5.0 or greater") instead of is_ie5 or is_opera5
// to check version in code which you want to work on future
// versions.

/**
* Severly curtailed all this as only certain elements
* are required by TreeMenu, specifically:
*  o is_ie4up
*  o is_nav6up
*  o is_gecko
*/

    // convert all characters to lowercase to simplify testing
    var agt=navigator.userAgent.toLowerCase();

    // *** BROWSER VERSION ***
    // Note: On IE5, these return 4, so use is_ie5up to detect IE5.
    var is_major = parseInt(navigator.appVersion);
    var is_minor = parseFloat(navigator.appVersion);

    // Note: Opera and WebTV spoof Navigator.  We do strict client detection.
    // If you want to allow spoofing, take out the tests for opera and webtv.
    var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
                && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
    var is_nav6up = (is_nav && (is_major >= 5));
    var is_gecko = (agt.indexOf('gecko') != -1);


    var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
    var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
    var is_ie4up  = (is_ie && (is_major >= 4));
//--> end hide JavaScript