Subversion Repositories eFlore/Applications.moissonnage

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Ignore whitespace Rev 3 → Rev 4

/trunk/widget/modules/carto/squelettes/scripts/layer/vector/KML.js
New file
0,0 → 1,337
/*global L: true */
 
L.KML = L.FeatureGroup.extend({
options: {
async: true
},
 
initialize: function(kml, options) {
L.Util.setOptions(this, options);
this._kml = kml;
this._layers = {};
 
if (kml) {
this.addKML(kml, options, this.options.async);
}
},
 
loadXML: function(url, cb, options, async) {
if (async == undefined) async = this.options.async;
if (options == undefined) options = this.options;
 
var req = new window.XMLHttpRequest();
req.open('GET', url, async);
try {
req.overrideMimeType('text/xml'); // unsupported by IE
} catch(e) {}
req.onreadystatechange = function() {
if (req.readyState != 4) return;
if(req.status == 200) cb(req.responseXML, options);
};
req.send(null);
},
 
addKML: function(url, options, async) {
var _this = this;
var cb = function(gpx, options) { _this._addKML(gpx, options) };
this.loadXML(url, cb, options, async);
},
 
_addKML: function(xml, options) {
var layers = L.KML.parseKML(xml);
if (!layers || !layers.length) return;
for (var i = 0; i < layers.length; i++)
{
this.fire('addlayer', {
layer: layers[i]
});
this.addLayer(layers[i]);
}
this.latLngs = L.KML.getLatLngs(xml);
this.fire("loaded");
},
 
latLngs: []
});
 
L.Util.extend(L.KML, {
 
parseKML: function (xml) {
var style = this.parseStyle(xml);
var el = xml.getElementsByTagName("Folder");
var layers = [], l;
for (var i = 0; i < el.length; i++) {
if (!this._check_folder(el[i])) { continue; }
l = this.parseFolder(el[i], style);
if (l) { layers.push(l); }
}
el = xml.getElementsByTagName('Placemark');
for (var j = 0; j < el.length; j++) {
if (!this._check_folder(el[j])) { continue; }
l = this.parsePlacemark(el[j], xml, style);
if (l) { layers.push(l); }
}
return layers;
},
 
// Return false if e's first parent Folder is not [folder]
// - returns true if no parent Folders
_check_folder: function (e, folder) {
e = e.parentElement;
while (e && e.tagName !== "Folder")
{
e = e.parentElement;
}
return !e || e === folder;
},
 
parseStyle: function (xml) {
var style = {};
var sl = xml.getElementsByTagName("Style");
 
//for (var i = 0; i < sl.length; i++) {
var attributes = {color: true, width: true, Icon: true, href: true,
hotSpot: true};
 
function _parse(xml) {
var options = {};
for (var i = 0; i < xml.childNodes.length; i++) {
var e = xml.childNodes[i];
var key = e.tagName;
if (!attributes[key]) { continue; }
if (key === 'hotSpot')
{
for (var j = 0; j < e.attributes.length; j++) {
options[e.attributes[j].name] = e.attributes[j].nodeValue;
}
} else {
var value = e.childNodes[0].nodeValue;
if (key === 'color') {
options.opacity = parseInt(value.substring(0, 2), 16) / 255.0;
options.color = "#" + value.substring(2, 8);
} else if (key === 'width') {
options.weight = value;
} else if (key === 'Icon') {
ioptions = _parse(e);
if (ioptions.href) { options.href = ioptions.href; }
} else if (key === 'href') {
options.href = value;
}
}
}
return options;
}
 
for (var i = 0; i < sl.length; i++) {
var e = sl[i], el;
var options = {}, poptions = {}, ioptions = {};
el = e.getElementsByTagName("LineStyle");
if (el && el[0]) { options = _parse(el[0]); }
el = e.getElementsByTagName("PolyStyle");
if (el && el[0]) { poptions = _parse(el[0]); }
if (poptions.color) { options.fillColor = poptions.color; }
if (poptions.opacity) { options.fillOpacity = poptions.opacity; }
el = e.getElementsByTagName("IconStyle");
if (el && el[0]) { ioptions = _parse(el[0]); }
if (ioptions.href) {
// save anchor info until the image is loaded
options.icon = new L.KMLIcon({
iconUrl: ioptions.href,
shadowUrl: null,
iconAnchorRef: {x: ioptions.x, y: ioptions.y},
iconAnchorType: {x: ioptions.xunits, y: ioptions.yunits}
});
}
style['#' + e.getAttribute('id')] = options;
}
return style;
},
 
parseFolder: function (xml, style) {
var el, layers = [], l;
el = xml.getElementsByTagName('Folder');
for (var i = 0; i < el.length; i++) {
if (!this._check_folder(el[i], xml)) { continue; }
l = this.parseFolder(el[i], style);
if (l) { layers.push(l); }
}
el = xml.getElementsByTagName('Placemark');
for (var j = 0; j < el.length; j++) {
if (!this._check_folder(el[j], xml)) { continue; }
l = this.parsePlacemark(el[j], xml, style);
if (l) { layers.push(l); }
}
if (!layers.length) { return; }
if (layers.length === 1) { return layers[0]; }
return new L.FeatureGroup(layers);
},
 
parsePlacemark: function (place, xml, style) {
var i, j, el, options = {};
el = place.getElementsByTagName('styleUrl');
for (i = 0; i < el.length; i++) {
var url = el[i].childNodes[0].nodeValue;
for (var a in style[url])
{
// for jshint
if (true)
{
options[a] = style[url][a];
}
}
}
var layers = [];
 
var parse = ['LineString', 'Polygon', 'Point'];
for (j in parse) {
// for jshint
if (true)
{
var tag = parse[j];
el = place.getElementsByTagName(tag);
for (i = 0; i < el.length; i++) {
var l = this["parse" + tag](el[i], xml, options);
if (l) { layers.push(l); }
}
}
}
 
if (!layers.length) {
return;
}
var layer = layers[0];
if (layers.length > 1) {
layer = new L.FeatureGroup(layers);
}
 
var name, descr = "";
el = place.getElementsByTagName('name');
if (el.length) {
name = el[0].childNodes[0].nodeValue;
}
el = place.getElementsByTagName('description');
for (i = 0; i < el.length; i++) {
for (j = 0; j < el[i].childNodes.length; j++) {
descr = descr + el[i].childNodes[j].nodeValue;
}
}
 
if (name) {
layer.bindPopup("<h2>" + name + "</h2>" + descr);
}
 
return layer;
},
 
parseCoords: function (xml) {
var el = xml.getElementsByTagName('coordinates');
return this._read_coords(el[0]);
},
 
parseLineString: function (line, xml, options) {
var coords = this.parseCoords(line);
if (!coords.length) { return; }
return new L.Polyline(coords, options);
},
 
parsePoint: function (line, xml, options) {
var el = line.getElementsByTagName('coordinates');
if (!el.length) {
return;
}
var ll = el[0].childNodes[0].nodeValue.split(',');
return new L.KMLMarker(new L.LatLng(ll[1], ll[0]), options);
},
 
parsePolygon: function (line, xml, options) {
var el, polys = [], inner = [], i, coords;
el = line.getElementsByTagName('outerBoundaryIs');
for (i = 0; i < el.length; i++) {
coords = this.parseCoords(el[i]);
if (coords) {
polys.push(coords);
}
}
el = line.getElementsByTagName('innerBoundaryIs');
for (i = 0; i < el.length; i++) {
coords = this.parseCoords(el[i]);
if (coords) {
inner.push(coords);
}
}
if (!polys.length) {
return;
}
if (options.fillColor) {
options.fill = true;
}
if (polys.length === 1) {
return new L.Polygon(polys.concat(inner), options);
}
return new L.MultiPolygon(polys, options);
},
 
getLatLngs: function (xml) {
var el = xml.getElementsByTagName('coordinates');
var coords = [];
for (var j = 0; j < el.length; j++) {
// text might span many childnodes
coords = coords.concat(this._read_coords(el[j]));
}
return coords;
},
 
_read_coords: function (el) {
var text = "", coords = [], i;
for (i = 0; i < el.childNodes.length; i++) {
text = text + el.childNodes[i].nodeValue;
}
text = text.split(/[\s\n]+/);
for (i = 0; i < text.length; i++) {
var ll = text[i].split(',');
if (ll.length < 2) {
continue;
}
coords.push(new L.LatLng(ll[1], ll[0]));
}
return coords;
}
 
});
 
L.KMLIcon = L.Icon.extend({
 
createIcon: function () {
var img = this._createIcon('icon');
img.onload = function () {
var i = new Image();
i.src = this.src;
this.style.width = i.width + 'px';
this.style.height = i.height + 'px';
 
if (this.anchorType.x === 'UNITS_FRACTION' || this.anchorType.x === 'fraction') {
img.style.marginLeft = (-this.anchor.x * i.width) + 'px';
}
if (this.anchorType.y === 'UNITS_FRACTION' || this.anchorType.x === 'fraction') {
img.style.marginTop = (-(1 - this.anchor.y) * i.height) + 'px';
}
this.style.display = "";
};
return img;
},
 
_setIconStyles: function (img, name) {
L.Icon.prototype._setIconStyles.apply(this, [img, name])
// save anchor information to the image
img.anchor = this.options.iconAnchorRef;
img.anchorType = this.options.iconAnchorType;
}
});
 
 
L.KMLMarker = L.Marker.extend({
options: {
icon: new L.KMLIcon.Default()
}
});