// JScript File

function AutoSuggestControl(oTextBox, oProvider) {
    this.cur = -1;
    this.layer = null;
    this.provider = oProvider;
    this.textbox = oTextBox;
    this.init();
}

AutoSuggestControl.prototype.selectRange = function (iStart, iLength) {
    if (this.textbox.createTextRange) {
        var oRange = this.textbox.createTextRange();
        oRange.moveStart("character", iStart);
        oRange.moveEnd("character", iLength - this.textbox.value.length);
        oRange.select();
    } else if (this.textbox.setSelectionRange) {
        this.textbox.setSelectionRange(iStart, iLength);
    }
    
    this.textbox.focus();
};

AutoSuggestControl.prototype.typeAhead = function (sSuggestion) {
    if (this.textbox.createTextRange || this.textbox.setSelectionRange) {
        var iLen = this.textbox.value.length;
        this.textbox.value = sSuggestion;
        this.selectRange(iLen, sSuggestion.length);
    }
};

AutoSuggestControl.prototype.autosuggest = function (aSuggestions, bTypeAhead) {
    if(aSuggestions != null){
        if (aSuggestions.length > 0) {
            if (bTypeAhead) {
                this.typeAhead(aSuggestions[0]);
            }
            this.showSuggestions(aSuggestions);
		
        } else {
            this.cur = -1;
            this.hideSuggestions();
        }
    }
};

AutoSuggestControl.prototype.handleKeyUp = function (oEvent) {
    var iKeyCode = oEvent.keyCode;
    
    if (iKeyCode == 8 || iKeyCode == 46) {
        this.provider.requestSuggestions(this, false);
    } else if (iKeyCode < 32 || (iKeyCode >= 33 && iKeyCode < 46) || (iKeyCode >= 112 && iKeyCode <= 123)) {
        //ignore
    } else {
        this.provider.requestSuggestions(this, false);
    }
};

AutoSuggestControl.prototype.init = function() {
    var oThis = this;
    
    this.textbox.onkeyup = function (oEvent) {
        if (!oEvent) {
            oEvent = window.event;
        }
        oThis.handleKeyUp(oEvent);
    };  
    
    this.textbox.onkeydown = function (oEvent) {
        if (!oEvent) {
            oEvent = window.event;
        }
        oThis.handleKeyDown(oEvent);
    };
    
    this.textbox.onblur = function () {
        oThis.hideSuggestions();
    };
    
    this.createDropDown();
};

AutoSuggestControl.prototype.hideSuggestions = function () {
    this.layer.style.visibility = "hidden";
};

AutoSuggestControl.prototype.highlightSuggestion = function (oSuggestionNode) {
    for (var i = 0; i < this.layer.childNodes.length; i++) {
        var oNode = this.layer.childNodes[i];
        if (oNode == oSuggestionNode) {
            oNode.className = "current";
        } else if (oNode.className == "current") {
            oNode.className = "";
        }
    }
};

AutoSuggestControl.prototype.createDropDown = function () {
    var oThis = this;

    this.layer = document.createElement("div");
    this.layer.className = "suggestions";
    this.layer.style.visibility = "hidden";
    this.layer.style.width = this.textbox.Width;
this.layer.style.position = "absolute";
this.layer.style.backgroundColor="White";
this.layer.style.border = "solid thin black";
this.layer.style.textAlign = "left";
    this.layer.onmousedown = this.layer.onmouseup = this.layer.onmouseover = function (oEvent) {
        oEvent = oEvent || window.event;
        oTarget = oEvent.target || oEvent.srcElement;
        
        if (oEvent.type == "mousedown") {
            oThis.textbox.value = oTarget.firstChild.nodeValue;
            oThis.hideSuggestions();
        } else if (oEvent.type == "mouseover") {
            oThis.highlightSuggestion(oTarget);
        } else {
            oThis.textbox.focus();
        }
    };
    
    document.body.appendChild(this.layer);
};

AutoSuggestControl.prototype.getLeft = function () {
    var oNode = this.textbox;
    var iLeft = 0;
    
    if (BrowserDetect.browser == "Explorer") {
        iLeft = 5;
    }
    
    while (oNode.tagName != "BODY") {
        iLeft += oNode.offsetLeft;
        oNode = oNode.offsetParent;
    }
    
    return iLeft;
};

AutoSuggestControl.prototype.getTop = function () {
    var oNode = this.textbox;
    var iTop = 0;
    
    if (BrowserDetect.browser == "Explorer") {
        iTop = 15;
    }
    
    while (oNode.tagName != "BODY") {
        iTop += oNode.offsetTop;
        oNode = oNode.offsetParent;
    }
    
    return iTop;
};

AutoSuggestControl.prototype.showSuggestions = function (aSuggestions) {
    var oDiv = null;
    this.layer.innerHTML = "";
    
    for (var i = 0; i < aSuggestions.length; i++) {
        oDiv = document.createElement("div");
        oDiv.appendChild(document.createTextNode(aSuggestions[i]));
        this.layer.appendChild(oDiv);
    }

    this.layer.style.left =this.getLeft() + "px";
    this.layer.style.top = (this.getTop() + this.textbox.offsetHeight) + "px";

    this.layer.style.visibility = "visible";
};

AutoSuggestControl.prototype.nextSuggestion = function () {
    var cSuggestionNodes = this.layer.childNodes;

    if (cSuggestionNodes.length > 0) {
        if (this.cur >= cSuggestionNodes.length - 1) {
            this.cur = -1;
        }
        var oNode = cSuggestionNodes[++this.cur];
        this.highlightSuggestion(oNode);
        this.textbox.value = oNode.firstChild.nodeValue;
    }
};

AutoSuggestControl.prototype.previousSuggestion = function () {
    var cSuggestionNodes = this.layer.childNodes;
    
    if (cSuggestionNodes.length > 0) {
        if (this.cur <= 0) {
            this.cur = cSuggestionNodes.length;
        }
        var oNode = cSuggestionNodes[--this.cur];
        this.highlightSuggestion(oNode);
        this.textbox.value = oNode.firstChild.nodeValue;
    }
};

AutoSuggestControl.prototype.handleKeyDown = function (oEvent) {
    switch (oEvent.keyCode) {
        case 38: //up arrow
            this.previousSuggestion();
            break;
        case 40: //down arrow
            this.nextSuggestion();
            break;
        case 13: //enter
            this.hideSuggestions();
            break;
    }
};

var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();