/* ----- livesearch.js ----- */
/*
// +----------------------------------------------------------------------+
// | Copyright (c) 2004 Bitflux GmbH                                      |
// +----------------------------------------------------------------------+
// | Licensed under the Apache License, Version 2.0 (the "License");      |
// | you may not use this file except in compliance with the License.     |
// | You may obtain a copy of the License at                              |
// | http://www.apache.org/licenses/LICENSE-2.0                           |
// | Unless required by applicable law or agreed to in writing, software  |
// | distributed under the License is distributed on an "AS IS" BASIS,    |
// | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or      |
// | implied. See the License for the specific language governing         |
// | permissions and limitations under the License.                       |
// +----------------------------------------------------------------------+
// | Author: Bitflux GmbH <devel@bitflux.ch>                              |
// +----------------------------------------------------------------------+

*/
var liveSearchReq = false;
var t = null;
var liveSearchLast = "";
var queryTarget = "livesearch_reply?q=";

var searchForm = null;
var searchInput = null; 

var isIE = false;


var _cache = new Object();

var widthOffset=1;

function calculateWidth(){
}


function getElementDimensions(elemID) {
    var base = document.getElementById(elemID);
    var offsetTrail = base;
    var offsetLeft = 0;
    var offsetTop = 0;
    var width = 0;
    
    while (offsetTrail) {
        offsetLeft += offsetTrail.offsetLeft;
        offsetTop += offsetTrail.offsetTop;
        offsetTrail = offsetTrail.offsetParent;
    }
    if (navigator.userAgent.indexOf("Mac") != -1 &&
        typeof document.body.leftMargin != "undefined") {
        offsetLeft += document.body.leftMargin;
        offsetTop += document.body.topMargin;
    }

    if(!isIE){
    width =  searchInput.offsetWidth-widthOffset*2;
    }
    else {
    width = searchInput.offsetWidth;
    }

    return { left:offsetLeft, 
         top:offsetTop, 
         width: width, 
             height: base.offsetHeight,
         bottom: offsetTop + base.offsetHeight, 
         right : offsetLeft + width};
}

function liveSearchInit() {
    searchInput = document.getElementById('searchGadget');
    if (searchInput == null || searchInput == undefined) return
//  Only keypress catches repeats in moz/FF but keydown is needed for
//  khtml based browsers.
    if (navigator.userAgent.indexOf("KHTML") > 0) {
        searchInput.addEventListener("keydown",liveSearchKeyPress,false);
        searchInput.addEventListener("focus",liveSearchDoSearch,false);
        searchInput.addEventListener("keydown",liveSearchStart, false);
    } else if (searchInput.addEventListener) {
        searchInput.addEventListener("keypress",liveSearchKeyPress,false);
        searchInput.addEventListener("blur",liveSearchHideDelayed,false);
        searchInput.addEventListener("keypress",liveSearchStart, false);
    } else {
        searchInput.attachEvent("onkeydown",liveSearchKeyPress);
        searchInput.attachEvent("onkeydown",liveSearchStart);
//      searchInput.attachEvent("onblur",liveSearchHide);
        isIE = true;
    }

//  Why doesn't this work in konq, setting it inline does.
    searchInput.setAttribute("autocomplete","off");

    var pos = getElementDimensions('searchGadget'); 
    result = document.getElementById('LSResult');
    pos.left = pos.left - result.offsetParent.offsetLeft + pos.width;
    result.style.display='none';
}


function liveSearchHideDelayed() {
    window.setTimeout("liveSearchHide()",400);
}
    
function liveSearchHide() { 
    document.getElementById("LSResult").style.display = "none";
    var highlight = document.getElementById("LSHighlight");
    if (highlight) {
        highlight.removeAttribute("id");
    }
}

function getFirstHighlight() {
    var set = getHits();
    return set[0];
}

function getLastHighlight() {
    var set = getHits();
    return set[set.length-1];
}

function getHits() {
    var res = document.getElementById("LSShadow");
    var set = res.getElementsByTagName('li');
    return set
}

function findChild(object, specifier) {
    var cur = object.firstChild;
    try {
    while (cur != undefined) {
        cur = cur.nextSibling;
        if (specifier(cur) == true) return cur;
    }
    } catch(e) {};
    return null;
    
}

function findNext(object, specifier) {
 var cur = object;
 try {
 while (cur != undefined) {

    cur = cur.nextSibling;
    if (cur.nodeType==3) cur=cur.nextSibling;
    
    if (cur != undefined) {
        if (specifier(cur) == true) return cur;
    } else { break }
 }
 } catch(e) {};
 return null;
}

function findPrev(object, specifier) {
 var cur = object;
 try {
        cur = cur.previousSibling;
        if (cur.nodeType==3) cur=cur.previousSibling;
        if (cur!=undefined) {
            if (specifier(cur) == true) 
                return cur;
        } 
 } catch(e) {};
 return null;
}


function liveSearchKeyPress(event) {
    if (event.keyCode == 40 )
    //KEY DOWN
    {
        highlight = document.getElementById("LSHighlight");
        if (!highlight) {
            highlight = getFirstHighlight();
        } else {
            highlight.removeAttribute("id");
            highlight = findNext(highlight, function (o) {return o.className =="LSRow";});

        }
        if (highlight) {
            highlight.setAttribute("id","LSHighlight");
        } 
        if (!isIE) { event.preventDefault(); }
    } 
    //KEY UP
    else if (event.keyCode == 38 ) {
        highlight = document.getElementById("LSHighlight");
        if (!highlight) {
            highlight = getLastHighlight();
        } 
        else {
            highlight.removeAttribute("id");
            highlight = findPrev(highlight, function (o) {return o.className=='LSRow';});
        }
        if (highlight) {
                highlight.setAttribute("id","LSHighlight");
        }
        if (!isIE) { event.preventDefault(); }
    } 
    //ESC
    else if (event.keyCode == 27) {
        highlight = document.getElementById("LSHighlight");
        if (highlight) {
            highlight.removeAttribute("id");
        }
        document.getElementById("LSResult").style.display = "none";
    } 
}
function liveSearchStart(event) {
    if (t) {
        window.clearTimeout(t);
    }
    code = event.keyCode;
    if (code!=40 && code!=38 && code!=27 && code!=37 && code!=39) {
        t = window.setTimeout("liveSearchDoSearch()",200);
    } 
}

function liveSearchDoSearch() {

    if (typeof liveSearchRoot == "undefined") {
        liveSearchRoot = "";
    }
    if (typeof liveSearchRootSubDir == "undefined") {
        liveSearchRootSubDir = "";
    }

    if (liveSearchLast != searchInput.value) {
    if (liveSearchReq && liveSearchReq.readyState < 4) {
        liveSearchReq.abort();
    }
    if ( searchInput.value == "") {
        liveSearchHide();
        return false;
    }

    // Do nothing as long as we have less then two characters - 
    // the search results makes no sense, and it's harder on the server.
    if ( searchInput.value.length < 2) {
        liveSearchHide();
        return false;
    }

    // Do we have cached results
    var result = _cache[searchInput.value];
    if (result) {
        showResult(result); 
        return;
    }
    liveSearchReq = new XMLHttpRequest();
    liveSearchReq.onreadystatechange= liveSearchProcessReqChange;
    liveSearchReq.open("GET", liveSearchRoot + queryTarget + encodeURI(searchInput.value) );
    liveSearchLast = searchInput.value;
    liveSearchReq.send(null);
    }
}

function showResult(result) {
  var  res = document.getElementById("LSResult");
  res.style.display = "block";
  var  sh = document.getElementById("LSShadow");
  sh.innerHTML = result;
}

function liveSearchProcessReqChange() {
    if (liveSearchReq.readyState == 4) {
        if (liveSearchReq.status > 299 || liveSearchReq.status < 200  ||
            liveSearchReq.responseText.length < 10) return; 
    showResult(liveSearchReq.responseText);
    _cache[liveSearchLast] = liveSearchReq.responseText;
    }
}

function liveSearchSubmit() {
    var highlight = document.getElementById("LSHighlight");
    
    if (highlight){
        target = highlight.getElementsByTagName('a')[0];
        window.location = liveSearchRoot + liveSearchRootSubDir + target;
        return false;
    } 
    else {
        return true;
    }
}



if (window.addEventListener) window.addEventListener("load",liveSearchInit,false);
else if (window.attachEvent) window.attachEvent("onload", liveSearchInit);