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koziavin
2025-07-14 23:28:04 +04:00
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// ----------------------------------------------------------------------------
// Zoom Search Engine 7.0 (10/Apr/2014)
// Highlight & auto-scroll script (DOM version)
//
// email: zoom@wrensoft.com
// www: http://www.wrensoft.com
//
// Copyright (C) Wrensoft 2014
// ----------------------------------------------------------------------------
// 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:
//
// <style>.highlight { background: #FFFF40; }</style>
// <script type="text/javascript" src="highlight.js"></script>
//
// 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:
//
// <body onload="highlight();">
//
// 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 </body> tag of your page:
//
// <script type="text/javascript">highlight();</script>
//
// For more information, consult the Users Guide and our support website at:
// http://www.wrensoft.com/zoom/support
// ----------------------------------------------------------------------------
// Script options
// ----------------------------------------------------------------------------
// 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;
// This option skips highlighting withing blocks marked by ZOOMSTOP and
// ZOOMRESTART tags.
var SkipZoomStops = true;
// ----------------------------------------------------------------------------
// Main script
// ----------------------------------------------------------------------------
var IsZoomStop = 0;
function catcherror() { return true; }
if (CatchJSErrors)
window.onerror = catcherror;
function QueryString(key)
{
var value = null;
for (var i=0;i<QueryString.keys.length;i++)
{
if (QueryString.keys[i]==key)
{
value = QueryString.values[i];
break;
}
}
return value;
}
function QueryString_Parse()
{
var query = window.location.search.substring(1);
var pairs = query.split("&");
for (var i=0;i<pairs.length;i++)
{
var pos = pairs[i].indexOf('=');
if (pos >= 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;
}
function ZRetrieveQuery()
{
var SearchAsSubstring = 0;
var hl;
var terms;
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;
terms = hl.match(re);
// convert terms in regexp patterns
for (var i=0;i<terms.length;i++) // take each term in turn
{
if(terms[i] != "")
{
if (terms[i].indexOf("\"") != -1)
{
// contains double quotes
terms[i]=terms[i].replace(/\"/g,"");
terms[i]=terms[i].replace(/\+/g," ");
}
else
{
terms[i]=terms[i].replace(/\+/g,"");
}
if (terms[i].indexOf("*") != -1 || terms[i].indexOf("?") != -1)
{
// convert wildcard pattern to regexp
terms[i] = terms[i].replace(/\\/g, " ");
terms[i] = terms[i].replace(/\^/g, " ");
//term[i] = term[i].replace(/\+/g, " "); // split on this so no point in looking
terms[i] = terms[i].replace(/\#/g, " ");
terms[i] = terms[i].replace(/\$/g, " ");
terms[i] = terms[i].replace(/\./g, " ");
// check if search term only contains only wildcards
// if so, we will not attempt to highlight this term
var wildcards = /\w/;
if (wildcards.test(terms[i]))
{
terms[i] = terms[i].replace(/\*/g, "[^\\s]*");
terms[i] = terms[i].replace(/\?/g, "[^\\s]"); // insist upon one non whitespace
}
else
terms[i] = "";
}
if (terms[i] != "")
{
if (SearchAsSubstring == 0)
{
terms[i] = "(>[\\s]*|>[^<]+[\\b\\W])("+terms[i]+")(<|[\\b\\W][^>]*<)";
}
else
{
// if term leads with wildcard then allow it to match preceeding text in word
var strWB="";
if(terms[i].substr(0,7)=="[^\\s]*") strWB="\\b";
terms[i] = "(>|>[^<]+)"+strWB+"("+terms[i]+")([^>]*<)";
}
}
}
}
return terms;
}
// regular expression version
function ZHighlightText(terms, text)
{
text=text.replace(/&amp;/ig, '&');
text=text.replace(/&nbsp;/ig, '');
text=text.replace(/</ig, '&lt;');
text=text.replace(/>/ig, '&gt;');
for (var i=0; i<terms.length; i++) // take each term in turn
{
if(terms[i] != "")
{
// we need a loop for the main search to catch all between ><
// 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(terms[i], "gi");
var count = 0; // just incase
// Correction by Tim Green for bug with pointed brackets inside the hilighted text node
text = text.replace(/<(?![\/]?span)/g, "&lt;");
text = text.replace(">","&gt;");
text = text.replace(/span&gt;/g, 'span>');
text = text.replace(/"highlight"&gt;/g, '"highlight">');
// Correction end
text = ">" + text + "<"; // temporary tag marks
do
{
l=text.length;
text=text.replace(re, '$1<span style="background:#FFFF40;" class="highlight" id="highlight" name="highlight">$2</span id="highlight">$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"), '&nbsp;');
return(text);
}
function jumpHL()
{
var d = getElement("highlight");
if (d)
{
if (d.scrollIntoView)
{
d.scrollIntoView();
}
else
{
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 ZHighlightReplace(q, node)
{
var node_value = node.nodeValue;
var newtext = ZHighlightText(q, node_value);
if (newtext != node_value)
{
var repl = document.createElement('span');
repl.innerHTML = newtext;
node.parentNode.replaceChild(repl, node);
}
}
function ZHighlightSearch(q, root)
{
if (!root)
root = document.body.childNodes;
for (var i = 0, j = root.length; i < j; i++)
{
ZHighlightSearch(q, root[i].childNodes);
if (SkipZoomStops && root[i].nodeType === 8)
{
if (root[i].nodeValue == "ZOOMSTOP")
IsZoomStop = 1;
else if (root[i].nodeValue == "ZOOMRESTART")
IsZoomStop = 0;
}
if (IsZoomStop == 0 && root[i].nodeType === 3)
{
ZHighlightReplace(q, root[i]);
}
}
}
function highlight()
{
if (!"".match) // check if browser supports regexp match() function
return;
if (document.body)
{
var terms = ZRetrieveQuery();
if (terms != false)
{
IsZoomStop = 0;
ZHighlightSearch(terms);
if (JumpToFirstOccurance)
jumpHL();
}
}
}