/*
    DynAPI Distribution
    DynObject, DynAPI Object, UserAgent, Library, Functions

    The DynAPI Distribution is distributed under the terms of the GNU LGPL license.
*/

function DynObject() {
    this.id = "DynObject"+DynObject._c++;
    DynObject.all[this.id] = this;
};
var p = DynObject.prototype;
p.getClassName = function() {return this._className};
p.getClass = function() {return dynapi.frame[this._className]};
p.isClass = function(n) {return DynObject.isClass(this._className,n)};
p.addMethod = function(n,fn) {this[n] = fn};
p.removeMethod = function(n) {this[n] = null};
p.setID = function(id,isInline,noImports) {
    if (this.id) delete DynObject.all[this.id];
    this.id = id;
    this.isInline=isInline;
    this._noInlineValues=noImports;
    DynObject.all[this.id] = this;
};
p.toString = function() {return "DynObject.all."+this.id};
DynObject.all = [];
DynObject._c = 0;
DynObject.isClass = function(cn,n) {
    if (cn == n) return true;
    else {
        var c = dynapi.frame[cn];
        var p = c.prototype._pClassName;
        if (p) return DynObject.isClass(p,n);
        else return false;
    }
};

function _UserAgent() {
    var b = navigator.appName;
    var v = this.version = navigator.appVersion;
    var ua = navigator.userAgent.toLowerCase();
    this.v = parseInt(v);
    this.safari = ua.indexOf("safari")>-1;  // always check for safari & opera
    this.opera = ua.indexOf("opera")>-1;    // before ns or ie
    this.ns = !this.opera && !this.safari && (b=="Netscape");
    this.ie = !this.opera && (b=="Microsoft Internet Explorer");
    this.gecko = ua.indexOf('gecko')>-1; // check for gecko engine
    if (this.ns) {
        this.ns4 = (this.v==4);
        this.ns6 = (this.v>=5);
        this.b = "Netscape";
    }else if (this.ie) {
        this.ie4 = this.ie5 = this.ie55 = this.ie6 = false;
        if (v.indexOf('MSIE 4')>0) {this.ie4 = true; this.v = 4;}
        else if (v.indexOf('MSIE 5')>0) {this.ie5 = true; this.v = 5;}
        else if (v.indexOf('MSIE 5.5')>0) {this.ie55 = true; this.v = 5.5;}
        else if (v.indexOf('MSIE 6')>0) {this.ie6 = true; this.v = 6;}
        this.b = "MSIE";
    }else if (this.opera) {
        this.v=parseInt(ua.substr(ua.indexOf("opera")+6,1)); // set opera version
        this.opera6=(this.v>=6);
        this.opera7=(this.v>=7);
        this.b = "Opera";
    }else if (this.safari) {
        this.ns6 = (this.v>=5); // ns6 compatible correct?
        this.b = "Safari";
    }
    this.dom = (document.createElement && document.appendChild && document.getElementsByTagName)? true : false;
    this.def = (this.ie||this.dom);
    this.win32 = ua.indexOf("win")>-1;
    this.mac = ua.indexOf("mac")>-1;
    this.other = (!this.win32 && !this.mac);
    this.supported = (this.def||this.ns4||this.ns6||this.opera)? true:false;
    this.broadband=false;
    this._bws=new Date; // bandwidth timer start
};

function DynAPIObject() {
    this.DynObject = DynObject;
    this.DynObject();

    this.version = '3.0.0-beta2';
    this.loaded = false;

    this.ua = new _UserAgent();

    this._loadfn = [];
    this._unloadfn = [];
    var f = this.frame = window;

    var url = f.document.location.href;
    url = url.substring(0,url.lastIndexOf('/')+1);
    this.documentPath = url;

    var o = this;

    this.library = {};
    this.library.setPath = function(p) {o.library.path = p};

    f.onload = function() {
        o.loaded = true;
        if (!o.ua.supported) return alert('Unsupported Browser. Exiting.');
        if (o.library._create) o.library._create();  // calls dynapi._onLoad() after loading necessary files
        else setTimeout(o+'._onLoad()',1);
    };
    f.onunload = function() {
        for (var i=0;i<o._unloadfn.length;i++) o._unloadfn[i]();
        if (o.document) {
            o.document._destroy();
            o.document = null;
        }
    };
};
p = DynAPIObject.prototype = new DynObject;

p.onLoad = function(f) {
    if (typeof(f)=="function") {
        if (!this.loaded) this._loadfn[this._loadfn.length] = f;
        else f();
    }
};
p._onLoad = function(f) {
    for (var i=0;i<this._loadfn.length;i++) this._loadfn[i]();
};
p.onUnload = function(f) {
    if (typeof(f)=="function") this._unloadfn[this._unloadfn.length] = f;
};
p.setPrototype = function(sC,sP) {
    var c = this.frame[sC];
    var p = this.frame[sP];
    if ((!c || !p) && this.ua.ns4 && this.library && this.library.elm) {
        if (!c) c = this.library.elm[sC];
        if (!p) p = this.library.elm[sP];
    }
    if (!c || !p) return alert('Prototype Error');
    c.prototype = new p();
    c.prototype._className = sC;
    c.prototype._pClassName = sP;
    c.toString = function() {return '['+sC+']'};
    return c.prototype;
};

var dynapi = new DynAPIObject();

dynapi.ximages={'__xCnTer__':0}; // eXtensible Images
p._imageGetHTML=function(){
    t= '<img src="'+this.src+'"'
    +((this.width)? ' width="'+this.width+'"':'')
    +((this.height)? ' height="'+this.height+'"':'')
    +' border="0">';
    return t;
};

dynapi.functions = {
    removeFromArray : function(array, index, id) {
        var which=(typeof(index)=="object")?index:array[index];
        if (id) delete array[which.id];
        else for (var i=0; i<array.length; i++) {
            if (array[i]==which) {
                if(array.splice) array.splice(i,1);
                else {
                    for(var x=i; x<array.length-1; x++) array[x]=array[x+1];
                    array.length -= 1;
                }
                break;
            }
        }
        return array;
    },
    removeFromObject : function(object, id) {
        if(!dynapi.ua.opera) delete object[id];
        else {
            var o={};
            for (var i in object) if(id!=i) o[i]=object[i];
            object=o;
        }
        return object;
    },
    True : function() {return true},
    False : function() {return false},
    Null : function() {},
    Zero : function() {return 0;},
    Allow : function() {
        event.cancelBubble = true;
        return true;
    },
    Deny : function() {
        event.cancelBubble = false;
        return false;
    },
    getImage : function(src,w,h) {
        img=(w!=null&&h!=null)? new Image(w,h) : new Image();
        img.src=src;
        img.getHTML=dynapi._imageGetHTML;
        return img;
    },
    getURLArguments : function(o) {  // pass a string or frame/layer object
        var url,l={};
        if (typeof(o)=="string") url = o;
        else if (dynapi.ua.ns4 && o.src) url = o.src;
        else if (o.document) url = o.document.location.href;
        else return l;
        var s = url.substring(url.indexOf('?')+1);
        var a = s.split('&');
        for (var i=0;i<a.length;i++) {
            var b = a[i].split('=');
            l[b[0]] = unescape(b[1]);
        }
        return l;
    },
    getAnchorLocation : function(a,lyr){
        var o,x=0,y=0;
        if(lyr && !lyr.doc) lyr=null;
        lyr=(lyr)? lyr:{doc:document,elm:document};
        if(typeof(a)=='string') {
            if(lyr.doc.all) a=lyr.doc.all[a];
            else if(lyr.doc.getElementById) a=lyr.doc.getElementById(a);
            else if(lyr.doc.layers) a=lyr.doc.anchors[a];
        }
        if(a) o=a;
        else return;
        if(lyr.doc.layers) { y+=o.y; x+=o.x;}
        else if(lyr.doc.getElementById || lyr.doc.all){
            while (o.offsetParent && lyr.elm!=o){
                x+= o.offsetLeft;y+= o.offsetTop;
                o = o.offsetParent;
            }
        }
        return {x:x,y:y,anchor:a};
    }
};

dynapi.documentArgs = dynapi.functions.getURLArguments(dynapi.frame);

dynapi.debug = {};
dynapi._debugBuffer = '';
dPrint=function(s){var d=dynapi.debug; d.print(s)};
dynapi.debug.print = function(s) {
    //@IF:DEBUG[
        if(s==null) s='';
        dynapi._debugBuffer += s + '\n';
    //]:DEBUG
};

// The DynAPI library system is optional, this can be removed if you want to include other scripts manually
function DynAPILibrary() {
    this.DynObject = DynObject;
    this.DynObject();

    // list of js files: this.scripts['../src/api/dynlayer_ie.js'] = {dep, objects, pkg, fn};
    this.scripts = {};

    // list of package names: this.packages['dynapi.api'] = dynapi.api = {_objects,_path}
    this.packages = {};

    // list of object names: this.objects['DynLayer'] = this.scripts['../src/api/dynlayer_ie.js']
    this.objects = {};

    this._c = 0;
    this.loadList = [];
    this.loadIndex = -1;
    this.path = null;
    this.busy = true;
};
p = dynapi.setPrototype('DynAPILibrary','DynObject');

// can return a path specific to a package, eg. dynapi.library.getPath('dynapi.api') returns '/src/dynapi/api/'
p.getPath = function(pkg) {
    if (!pkg) pkg = 'dynapi';
    if (this.packages[pkg]) return this.packages[pkg]._path;
    return null;
};

// set dynapi path
p.setPath = function(p,pkgFile) {
    this.path = p;

    // to-do: rearrange so add()'s can be done before setPath
    //        full paths will then be determined when queued
    //        need an extra argument on addPackage to specify whether the path is relative to this.path or not
    // OR:    add functionality so that these package definitions can be loaded/included on the fly

    // load pkgFile or 'ext/packages.js' file
    var s='<script type="text/javascript" language="JavaScript" src="'
    +((pkgFile)? pkgFile:p+'ext/packages.js')+'"><\/script>';
    document.write(s);
};

// adds package(s) to the library
p.addPackage = function(pkg, path) {
    var ps;
    if (pkg.indexOf('.')) ps = pkg.split('.');
    else ps = [pkg];

    var p = dynapi.frame;
    for (var i=0;i<ps.length;i++) {  // returns the package object (eg. dynapi.api), or creates it if non-existant
        if (!p[ps[i]]) p[ps[i]] = {};
        p = p[ps[i]];
    }
    this.packages[pkg] = p;
    p._objects = [];
    p._path = path;
    return p;
};

// add object(s) to the library
p.add = function(name, src, dep, relSource) {
    var objects = typeof(name)=="string"? [name] : name;
    dep = (!dep)? [] : typeof(dep)=="string"? [dep] : dep;

    var s,p,pkg;
    if (objects[0].indexOf('.')) {
        pkg = objects[0].substring(0,objects[0].lastIndexOf('.'));
        if (pkg && this.packages[pkg]) {
            p = this.packages[pkg];
            if (relSource!=false) src = p._path + src;
        }
    }
    if (!this.scripts[src]) s = this.scripts[src] = {};
    else s = this.scripts[src];
    s.objects = [];
    s.dep = dep;
    s.rdep = [];
    s.src = src;
    s.pkg = pkg;
    s.loaded = false;
    s.fn = null;

    var n;
    for (var i=0;i<objects.length;i++) {
        n = objects[i];
        if (pkg) n = n.substring(n.lastIndexOf('.')+1);
        this.objects[n] = s;
        s.objects[s.objects.length] = n;
        if (p) p._objects[p._objects.length] = n;
    }

    return s;
};
// adds a dependency, whenever object "n" is loaded it will load object "d" beforehand
p.addBefore = function(n, d) {
    var s = this.objects[n];
    if (s && this.objects[d]) s.dep[s.dep.length] = d;
};
// adds a reverse dependency, whenever object "n" is loaded it will load object "r" afterword
p.addAfter = function(n, r) {
    var s = this.objects[n];
    if (s && this.objects[r]) s.rdep[s.rdep.length] = r;
};

// returns a list of js source filenames to load
p._queue = function(n, list, force) {
    var na=[], names=[],o;
    if (list==null) list = [];
    if (typeof(n)=="string") na = [n];
    else na = n;

    for (var i=0;i<na.length;i++) {
        o = na[i];
        if (typeof(o)=="string") {
            if (this.packages[o])
                for (var j in this.packages[o]._objects)
                    names[names.length] = this.packages[o]._objects[j];
            else names[names.length] = o;
        }
        else if (typeof(o)=="object" && o.length) {
            list = this._queue(o, list, force);
        }
    }

    var s;
    for (var j=0;j<names.length;j++) {
        s = this._queueObject(names[j], force);
        if (s) {
            if (s.dep)
                for (var i=0;i<s.dep.length;i++)
                    list = this._queue(s.dep[i], list, force);
            list[list.length] = s.src;
            // also include reverse deps
            if (s.rdep.length) list = this._queue(s.rdep, list, force);
        }
    }
    return list;
};

// determines whether to queue the script this object is in
p._queueObject = function(n, f) {
    if (n.indexOf('.')) {
        var pkg = n.substring(0,n.lastIndexOf('.'));
        if (this.packages[pkg]) n = n.substring(n.lastIndexOf('.')+1);
    }
    var s = this.objects[n];
    if (s) {
        if (!s.queued) {
            if (f!=true && s.loaded) dynapi.debug.print('Library Warning: '+n+' is already loaded');
            else {
                s.queued = true;
                s.loaded = false;
                return s;
            }
        }
    }
    else dynapi.debug.print('Library Error: no library map for '+n);
    return false;
};

// writes the <script> tag for the object
p.include = function() {
    var a = arguments;
    if (a[0]==true) a=a[1]; // arguments used ONLY by packages.js
    // buffer includes until packages(.js) are loaded
    if (!this._pakLoaded) {
        if(!this._buffer) this._buffer=[];
        this._buffer[this._buffer.length]=a;
        return;
    }
    if (dynapi.loaded) this.load(a);
    else {
        var list = this._queue(a);
        var src;
        for (var i=0;i<list.length;i++) {
            src = list[i];
            this.scripts[src].loaded = true;
            dynapi.frame.document.write('<script type="text/javascript" language="JavaScript" src="'+src+'"><\/script>');
        }
    }
};
p.load = p.reload = p.loadScript = p.reloadScript = function(n) {
    dynapi.debug.print('Warning: dynapi.library load extensions not included');
};
dynapi.library = new DynAPILibrary();

// deprecated
var DynAPI = dynapi;
