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yacysearch_location.html
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yacysearch_location.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>YaCy '#[clientname]#': Location Search</title>
#%env/templates/metas.template%#
<script type="text/javascript" src="http://openlayers.org/api/OpenLayers.js"></script>
<script type="text/javascript" src="http://www.openstreetmap.org/openlayers/OpenStreetMap.js"></script>
<script type="text/javascript">
// possible values for dom: location,metatag,alltext,title,publisher,creator,subject
var map;
var searchLayer_md0 = null; // two layers each for double-buffering during search
var searchLayer_md1 = null;
var searchLayer_co0 = null;
var searchLayer_co1 = null;
var path_mdsearch = 'yacysearch_location.rss?dom=alltext&query=';
var path_losearch = 'yacysearch_location.rss?dom=location&query=';
var marker_md = new OpenLayers.Icon("/env/grafics/marker_red.png", new OpenLayers.Size(11,16));
var marker_co = new OpenLayers.Icon("/env/grafics/star_yellow.png", new OpenLayers.Size(25,25));
var shallZoom = true; // flag if the map shall be zoomed to the search result
var shallReload = false; // flag if the search shall be repeated upon next resize of the window
var poisfound = 0;
var kmNormal = 100; // ca. 1km grid for radius
var meterNormal = 100000; // ca. 1m grid for location
// automatically adapt height of map upon window resize
function adaptHeight() {
document.getElementById('map').style.height = (document.documentElement.clientHeight - 130) + "px";
}
window.onresize = adaptHeight;
// initialize the map layers
function init() {
map = new OpenLayers.Map('map', {
maxResolution:'auto',
controls:[
new OpenLayers.Control.Navigation(),
new OpenLayers.Control.PanZoomBar(),
new OpenLayers.Control.ZoomBox(),
new OpenLayers.Control.LayerSwitcher(),
new OpenLayers.Control.Attribution()]
});
//layerMaplint = new OpenLayers.Layer.OSM.Maplint("Maplint");
layerWMS = new OpenLayers.Layer.WMS( "OpenLayers WMS", "http://labs.metacarta.com/wms/vmap0", {layers: 'basic'} );
layerMapnik = new OpenLayers.Layer.OSM.Mapnik("Mapnik");
layerCycleMap = new OpenLayers.Layer.OSM.CycleMap("CycleMap");
map.addLayer(layerMapnik);
map.addLayer(layerCycleMap);
//map.addLayer(layerMaplint);
map.addLayer(layerWMS);
map.addControl(new OpenLayers.Control.LayerSwitcher());
map.setCenter(new OpenLayers.LonLat(9,48) // Center of the map
.transform(
new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
new OpenLayers.Projection("EPSG:900913") // to Spherical Mercator Projection
), 5 // Zoom level
);
map.events.register( "zoomend", map, zoomChanged );
map.events.register( "movestart", map, zoomChanged );
//#(initsearch)#::
var query = '#[query]#'.replace(' ', '+');
//#(/initsearch)#
window.setInterval("refresh()", 1000);
}
function zoomChanged () {
shallZoom = false; // no automatic zoom if user hs zoomed
refreshsearch();
}
// called if a search is submitted
function search() {
refreshsearch();
}
// refresh is called if the map is zoomed or paned to get a new search result for the viewport
function refreshsearch() {
var query = document.getElementById('query').value.replace(' ', '+');
if (searchLayer_md0 != null) searchLayer_md0.destroy();
if (searchLayer_co0 != null) searchLayer_co0.destroy();
var center = map.getCenter().transform(new OpenLayers.Projection("EPSG:900913"), new OpenLayers.Projection("EPSG:4326"));
var extend = map.getExtent().transform(new OpenLayers.Projection("EPSG:900913"), new OpenLayers.Projection("EPSG:4326"));
var radius = Math.sqrt(extend.getWidth() * extend.getWidth() + extend.getHeight() * extend.getHeight()) / 2;
radius = Math.floor(radius * kmNormal + 1) / kmNormal;
var lon = Math.floor(center.lon * meterNormal) / meterNormal;
var lat = Math.floor(center.lat * meterNormal) / meterNormal;
searchLayer_co0 = new OpenLayers.Layer.GeoRSS('Communities', path_losearch + query + '&lon=' + lon + '&lat=' + lat + '&r=' + radius + '&z=' + map.getZoom(), {'icon':marker_co});
searchLayer_md0 = new OpenLayers.Layer.GeoRSS('Point Of Interest', path_mdsearch + query + '&lon=' + lon + '&lat=' + lat + '&r=' + radius + '&z=' + map.getZoom(), {'icon':marker_md});
map.addLayer(searchLayer_co0);
map.addLayer(searchLayer_md0);
//document.getElementById('apilink').setAttribute('href', 'yacysearch_location.rss?query=' + query);
poisfound = 0;
document.getElementById('resultline').innerHTML = "";
}
function refresh() {
// check double-buffer state
if (searchLayer_md0 != null) {
// switch the double-buffer
if (searchLayer_md1 != null) searchLayer_md1.destroy();
if (searchLayer_co1 != null) searchLayer_co1.destroy();
searchLayer_md1 = searchLayer_md0;
searchLayer_co1 = searchLayer_co0;
searchLayer_md0 = null;
searchLayer_co0 = null;
}
// check if we need to do something
if (searchLayer_co1 == null || searchLayer_md1 == null) {
return;
}
var cocount = searchLayer_co1.markers.length;
var mdcount = searchLayer_md1.markers.length;
//if (mdcount + cocount <= poisfound) {
// return;
//}
// update map and result line
poisfound = mdcount + cocount;
document.getElementById('resultline').innerHTML = poisfound + " POIs found in visible map";
// check if any of the markers is visible on the screen.
// this is only necessary if shallZoom = false since this would set shallZoom = true
var bounds = searchLayer_md1.getDataExtent();
/*
if (!shallZoom) {
// check all markers
//if (!bounds.intersectsBounds(map.getExtent())) shallZoom = true;
var anyInScreen = false;
var mapbounds = map.getExtent();
//alert(searchLayer_md1.markers.length + " markers");
for (var marker in searchLayer_md1.markers) {
if (marker.lonlat != null && mapbounds.containsLonLat(marker.lonlat, {})) {anyInScreen = true; break;}
}
if (!anyInScreen) shallZoom = true;
}
*/
// zoom to layer bounds
if (shallZoom) {
if (bounds == null) {return;} //bounds = searchLayer_co1.getDataExtent();
map.panTo(bounds.getCenterLonLat());
map.zoomTo(map.getZoomForExtent(bounds));
}
}
</script>
</head>
<body id="yacysearch_location" onload="init();">
#(topmenu)#
#%env/templates/embeddedheader.template%#
::
<div id="api">
<a href="yacysearch_location.rss" id="apilink"><img src="/env/grafics/api.png" width="60" height="40" alt="API"/></a>
<script type="text/javascript">
//<![CDATA[
document.getElementById('apilink').setAttribute('href', 'yacysearch_location.rss?dom=metatag|alltext&' + window.location.search.substring(1));
//]]>
</script>
<span>The information that is presented on this page can also be retrieved as XML
Click the API icon to see the XML.
To see a list of all APIs, please visit the <a href="http://www.yacy-websuche.de/wiki/index.php/Dev:API">API wiki page</a>.</span>
</div>
#%env/templates/simpleheader.template%#
#(/topmenu)#
<form class="search small" onsubmit="return false;" class="search small" accept-charset="UTF-8">
<h2>#[promoteSearchPageGreeting]#</h2>
<div class="yacylogo"><a href="#[promoteSearchPageGreeting.homepage]#" class="yacylogo"><img src="#[promoteSearchPageGreeting.smallImage]#" alt="yacysearch" /></a></div>
<fieldset class="yacys">
<input type="text" value="#(initsearch)#::#[query]##(/initsearch)#" id="query" size="42" onFocus="this.select()" />
<input type="submit" onclick="search(); return false;" value="search" onsubmit="search(); return false;" />
</fieldset>
<div id="resultline"></div>
</form><br/>
<div id="map" style="clear:both; width:100%; height:720px"></div>
<script type="text/javascript">
adaptHeight();
</script>
</body>
</html>