/*
Zoom Search Engine 5.0 (16/Jan/2007)
Highlight & auto-scroll script
zoom@wrensoft.com
http://www.wrensoft.com
Copyright (C) Wrensoft 2007
Use this script to allow your search matches to highlight and scroll to the matched word on the actual web page where it was found.
You will need to link to this JS file from each page of your site which requires the "highlight/jump to matched word" feature.
For example, you could paste the following HTML in your site's header or
footer:
Note: You will need to specify the correct path to "highlight.js" depending on where the file is located.
You will then need to modify the BODY tag on your page to include an "onLoad" attribute, such as:
If for some reason you can not modify the body tag of your page, an alternative would be to put the following line after the
tag of your page:
For more information, consult the Users Guide and our support website at: http://www.wrensoft.com/zoom/support
This script is licensed for use with the Zoom Search Engine. Original development by Brett Alcock, VBasys Limited. To licence other applications email highlight@vbasys.com with the subject "license".
*/
// If you wish to disable the jump functionality which scrolls the browser to the first occurance of the matched word, change this setting to false
var JumpToFirstOccurance = true;
// For debugging purposes, disable the following
var CatchJSErrors = true;
function catcherror() { return true; }
if (CatchJSErrors)
{
window.onerror = catcherror;
}
function QueryString(key)
{
var value = null;
for (var i=0;i= 0)
{
var argname = pairs[i].substring(0,pos);
var value = pairs[i].substring(pos+1);
QueryString.keys[QueryString.keys.length] = argname;
QueryString.values[QueryString.values.length] = value;
}
}
}
QueryString.keys = new Array();
QueryString.values = new Array();
QueryString_Parse();
function getElement(id)
{
if (document.getElementById)
return(document.getElementById(id));
else if (document.all)
return(document.all[id]);
}
function findPosY(obj)
{
var curtop = 0;
if (obj.offsetParent)
{
while (obj.offsetParent)
{
curtop += obj.offsetTop
obj = obj.offsetParent;
}
}
else if (obj.y)
curtop += obj.y;
return curtop;
}
// regular expression version
function SearchHiLite(text)
{
var SearchAsSubstring = 0;
var hl;
hl = QueryString("zoom_highlight");
if (hl == "" || hl == null)
{
hl = QueryString("zoom_highlightsub");
if (hl == "" || hl == null)
return false;
else
SearchAsSubstring = 1;
}
if ((document.charset && document.charset == "utf-8") ||
(document.characterSet && document.characterSet == "UTF-8"))
hl = decodeURIComponent(hl);
else
hl = unescape(hl);
hl = hl.toLowerCase();
// create array of terms
//var term = hl.split("+");
var re = /\"(.*?)\"|[^\\+\"]+/g;
var term = hl.match(re);
// convert terms in regexp patterns
for (var i=0;i]*<)";
}
else
{
// if term leads with wildcard then allow it to match preceeding text in word
var strWB="";
if(term[i].substr(0,7)=="[^\\s]*") strWB="\\b";
term[i] = "(>|>[^<]+)"+strWB+"("+term[i]+")([^>]*<)";
}
}
}
}
text=text.replace(/&/ig, '&');
text=text.replace(/ /ig, '');
for (var i=0;i<
// and we add before each found to ignore those done etc
// todo: develop reliable single pass regexp and dispose of loop
var l = 0;
re = new RegExp(term[i], "gi");
var count = 0; // just incase
text = ">" + text + "<"; // temporary tag marks
do
{
l=text.length;
text=text.replace(re, '$1$2$3');
count++;
}
//while(re.lastIndex>0 && count<100); lastIndex not set properly under netscape
while(l!=text.length && count<100);
text = text.substring(1, text.length-1); // remove temporary tags
}
}
text = text.replace(eval("//g"), '');
text = text.replace(eval("//g"), ' ');
return(text);
}
function jumpHL()
{
var d=getElement("highlight");
if(d)
{
var y=findPosY(d);
// if element near top of page
if(y < 100)
window.scrollTo(0,0); // go to top of page
else
window.scrollTo(0,y-50); // show space of 50 above
}
}
function highlight()
{
if (!"".match) // check if browser supports regexp match() function
return;
var x = document.body;
if (x)
{
var strHTML=SearchHiLite(x.innerHTML);
if (strHTML!=false) x.innerHTML = strHTML;
if (JumpToFirstOccurance) jumpHL();
}
}