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Javier Braña
2025-01-28 00:04:13 +01:00
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/*!
Copyright (c) 2011-2015, Pavel Shramov, Bruno Bergot - MIT licence
*/
L.KML = L.FeatureGroup.extend({
initialize: function (kml) {
this._kml = kml;
this._layers = {};
if (kml) {
this.addKML(kml);
}
},
addKML: function (xml) {
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.parseStyles(xml);
this.parseStyleMap(xml, style);
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); }
}
el = xml.getElementsByTagName('GroundOverlay');
for (var k = 0; k < el.length; k++) {
l = this.parseGroundOverlay(el[k]);
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.parentNode;
while (e && e.tagName !== 'Folder')
{
e = e.parentNode;
}
return !e || e === folder;
},
parseStyles: function (xml) {
var styles = {};
var sl = xml.getElementsByTagName('Style');
for (var i=0, len=sl.length; i<len; i++) {
var style = this.parseStyle(sl[i]);
if (style) {
var styleName = '#' + style.id;
styles[styleName] = style;
}
}
return styles;
},
parseStyle: function (xml) {
var style = {}, poptions = {}, ioptions = {}, el, id;
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(6, 8) + value.substring(4, 6) + value.substring(2, 4);
} else if (key === 'width') {
options.weight = parseInt(value);
} else if (key === 'Icon') {
ioptions = _parse(e);
if (ioptions.href) { options.href = ioptions.href; }
} else if (key === 'href') {
options.href = value;
}
}
}
return options;
}
el = xml.getElementsByTagName('LineStyle');
if (el && el[0]) { style = _parse(el[0]); }
el = xml.getElementsByTagName('PolyStyle');
if (el && el[0]) { poptions = _parse(el[0]); }
if (poptions.color) { style.fillColor = poptions.color; }
if (poptions.opacity) { style.fillOpacity = poptions.opacity; }
el = xml.getElementsByTagName('IconStyle');
if (el && el[0]) { ioptions = _parse(el[0]); }
if (ioptions.href) {
style.icon = new L.KMLIcon({
iconUrl: ioptions.href,
shadowUrl: null,
anchorRef: {x: ioptions.x, y: ioptions.y},
anchorType: {x: ioptions.xunits, y: ioptions.yunits}
});
}
id = xml.getAttribute('id');
if (id && style) {
style.id = id;
}
return style;
},
parseStyleMap: function (xml, existingStyles) {
var sl = xml.getElementsByTagName('StyleMap');
for (var i = 0; i < sl.length; i++) {
var e = sl[i], el;
var smKey, smStyleUrl;
el = e.getElementsByTagName('key');
if (el && el[0]) { smKey = el[0].textContent; }
el = e.getElementsByTagName('styleUrl');
if (el && el[0]) { smStyleUrl = el[0].textContent; }
if (smKey === 'normal')
{
existingStyles['#' + e.getAttribute('id')] = existingStyles[smStyleUrl];
}
}
return;
},
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); }
}
el = xml.getElementsByTagName('GroundOverlay');
for (var k = 0; k < el.length; k++) {
if (!this._check_folder(el[k], xml)) { continue; }
l = this.parseGroundOverlay(el[k]);
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, options) {
var h, i, j, k, el, il, opts = 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]) {
opts[a] = style[url][a];
}
}
il = place.getElementsByTagName('Style')[0];
if (il) {
var inlineStyle = this.parseStyle(place);
if (inlineStyle) {
for (k in inlineStyle) {
opts[k] = inlineStyle[k];
}
}
}
var multi = ['MultiGeometry', 'MultiTrack', 'gx:MultiTrack'];
for (h in multi) {
el = place.getElementsByTagName(multi[h]);
for (i = 0; i < el.length; i++) {
var layer = this.parsePlacemark(el[i], xml, style, opts);
this.addPlacePopup(place, layer);
return layer;
}
}
var layers = [];
var parse = ['LineString', 'Polygon', 'Point', 'Track', 'gx:Track'];
for (j in parse) {
var tag = parse[j];
el = place.getElementsByTagName(tag);
for (i = 0; i < el.length; i++) {
var l = this['parse' + tag.replace(/gx:/, '')](el[i], xml, opts);
if (l) { layers.push(l); }
}
}
if (!layers.length) {
return;
}
var layer = layers[0];
if (layers.length > 1) {
layer = new L.FeatureGroup(layers);
}
this.addPlacePopup(place, layer);
return layer;
},
addPlacePopup: function(place, layer) {
var i, j, name, descr = '';
el = place.getElementsByTagName('name');
if (el.length && el[0].childNodes.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, { className: 'kml-popup'});
}
},
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);
},
parseTrack: function (line, xml, options) {
var el = xml.getElementsByTagName('gx:coord');
if (el.length === 0) { el = xml.getElementsByTagName('coord'); }
var coords = [];
for (var j = 0; j < el.length; j++) {
coords = coords.concat(this._read_gxcoords(el[j]));
}
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;
},
_read_gxcoords: function (el) {
var text = '', coords = [];
text = el.firstChild.nodeValue.split(' ');
coords.push(new L.LatLng(text[1], text[0]));
return coords;
},
parseGroundOverlay: function (xml) {
var latlonbox = xml.getElementsByTagName('LatLonBox')[0];
var bounds = new L.LatLngBounds(
[
latlonbox.getElementsByTagName('south')[0].childNodes[0].nodeValue,
latlonbox.getElementsByTagName('west')[0].childNodes[0].nodeValue
],
[
latlonbox.getElementsByTagName('north')[0].childNodes[0].nodeValue,
latlonbox.getElementsByTagName('east')[0].childNodes[0].nodeValue
]
);
var attributes = {Icon: true, href: true, color: true};
function _parse (xml) {
var options = {}, ioptions = {};
for (var i = 0; i < xml.childNodes.length; i++) {
var e = xml.childNodes[i];
var key = e.tagName;
if (!attributes[key]) { continue; }
var value = e.childNodes[0].nodeValue;
if (key === 'Icon') {
ioptions = _parse(e);
if (ioptions.href) { options.href = ioptions.href; }
} else if (key === 'href') {
options.href = value;
} else if (key === 'color') {
options.opacity = parseInt(value.substring(0, 2), 16) / 255.0;
options.color = '#' + value.substring(6, 8) + value.substring(4, 6) + value.substring(2, 4);
}
}
return options;
}
var options = {};
options = _parse(xml);
if (latlonbox.getElementsByTagName('rotation')[0] !== undefined) {
var rotation = latlonbox.getElementsByTagName('rotation')[0].childNodes[0].nodeValue;
options.rotation = parseFloat(rotation);
}
return new L.RotatedImageOverlay(options.href, bounds, {opacity: options.opacity, angle: options.rotation});
}
});
L.KMLIcon = L.Icon.extend({
options: {
iconSize: [32, 32],
iconAnchor: [16, 16],
},
_setIconStyles: function (img, name) {
L.Icon.prototype._setIconStyles.apply(this, [img, name]);
if( img.complete ) {
this.applyCustomStyles( img )
} else {
img.onload = this.applyCustomStyles.bind(this,img)
}
},
applyCustomStyles: function(img) {
var options = this.options;
var width = options.iconSize[0];
var height = options.iconSize[1];
this.options.popupAnchor = [0,(-0.83*height)];
if (options.anchorType.x === 'fraction')
img.style.marginLeft = (-options.anchorRef.x * width) + 'px';
if (options.anchorType.y === 'fraction')
img.style.marginTop = ((-(1 - options.anchorRef.y) * height) + 1) + 'px';
if (options.anchorType.x === 'pixels')
img.style.marginLeft = (-options.anchorRef.x) + 'px';
if (options.anchorType.y === 'pixels')
img.style.marginTop = (options.anchorRef.y - height + 1) + 'px';
}
});
L.KMLMarker = L.Marker.extend({
options: {
icon: new L.KMLIcon.Default()
}
});
// Inspired by https://github.com/bbecquet/Leaflet.PolylineDecorator/tree/master/src
L.RotatedImageOverlay = L.ImageOverlay.extend({
options: {
angle: 0
},
_reset: function () {
L.ImageOverlay.prototype._reset.call(this);
this._rotate();
},
_animateZoom: function (e) {
L.ImageOverlay.prototype._animateZoom.call(this, e);
this._rotate();
},
_rotate: function () {
if (L.DomUtil.TRANSFORM) {
// use the CSS transform rule if available
this._image.style[L.DomUtil.TRANSFORM] += ' rotate(' + this.options.angle + 'deg)';
} else if (L.Browser.ie) {
// fallback for IE6, IE7, IE8
var rad = this.options.angle * (Math.PI / 180),
costheta = Math.cos(rad),
sintheta = Math.sin(rad);
this._image.style.filter += ' progid:DXImageTransform.Microsoft.Matrix(sizingMethod=\'auto expand\', M11=' +
costheta + ', M12=' + (-sintheta) + ', M21=' + sintheta + ', M22=' + costheta + ')';
}
},
getBounds: function () {
return this._bounds;
}
});

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# Leaflet KML layer plugin
![Example](assets/screenshot.jpg)
Demo: https://www.windy.com/uploader
This plugin was extracted from Pavel Shramov's Leaflet Plugins [repository](https://github.com/shramov/leaflet-plugins) in order to maintain this code more frequently and separate KML layer from other plugins.
So far we have fixed few issues.
Probably will work on Leaflet 1+, tested on Leaflet 1.4.
## How to use
```html
<html>
<head>
<link rel="stylesheet" href="http://unpkg.com/leaflet@1.4.0/dist/leaflet.css" />
<script src="http://unpkg.com/leaflet@1.4.0/dist/leaflet.js"></script>
<script src="./L.KML.js"></script>
</head>
<body>
<div style="width: 100vw; height: 100vh" id="map"></div>
<script type="text/javascript">
// Make basemap
const map = new L.Map('map', { center: new L.LatLng(58.4, 43.0), zoom: 11 });
const osm = new L.TileLayer('http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png');
map.addLayer(osm);
// Load kml file
fetch('assets/example1.kml')
.then(res => res.text())
.then(kmltext => {
// Create new kml overlay
const parser = new DOMParser();
const kml = parser.parseFromString(kmltext, 'text/xml');
const track = new L.KML(kml);
map.addLayer(track);
// Adjust map to show the kml
const bounds = track.getBounds();
map.fitBounds(bounds);
});
</script>
</body>
</html>
```
## Changelog
- 1.0.1 - Updated README
- 1.0.0 - Initial commit, original version with few fixes
## Licence
MIT

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<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document>
<name>KML Samples</name>
<open>1</open>
<description>Unleash your creativity with the help of these examples!</description>
<Style id="downArrowIcon">
<IconStyle>
<Icon>
<href>http://maps.google.com/mapfiles/kml/pal4/icon28.png</href>
</Icon>
</IconStyle>
</Style>
<Style id="globeIcon">
<IconStyle>
<Icon>
<href>http://maps.google.com/mapfiles/kml/pal3/icon19.png</href>
</Icon>
</IconStyle>
<LineStyle>
<width>2</width>
</LineStyle>
</Style>
<Style id="transPurpleLineGreenPoly">
<LineStyle>
<color>7fff00ff</color>
<width>4</width>
</LineStyle>
<PolyStyle>
<color>7f00ff00</color>
</PolyStyle>
</Style>
<Style id="yellowLineGreenPoly">
<LineStyle>
<color>7f00ffff</color>
<width>4</width>
</LineStyle>
<PolyStyle>
<color>7f00ff00</color>
</PolyStyle>
</Style>
<Style id="thickBlackLine">
<LineStyle>
<color>87000000</color>
<width>10</width>
</LineStyle>
</Style>
<Style id="redLineBluePoly">
<LineStyle>
<color>ff0000ff</color>
</LineStyle>
<PolyStyle>
<color>ffff0000</color>
</PolyStyle>
</Style>
<Style id="blueLineRedPoly">
<LineStyle>
<color>ffff0000</color>
</LineStyle>
<PolyStyle>
<color>ff0000ff</color>
</PolyStyle>
</Style>
<Style id="transRedPoly">
<LineStyle>
<width>1.5</width>
</LineStyle>
<PolyStyle>
<color>7d0000ff</color>
</PolyStyle>
</Style>
<Style id="transBluePoly">
<LineStyle>
<width>1.5</width>
</LineStyle>
<PolyStyle>
<color>7dff0000</color>
</PolyStyle>
</Style>
<Style id="transGreenPoly">
<LineStyle>
<width>1.5</width>
</LineStyle>
<PolyStyle>
<color>7d00ff00</color>
</PolyStyle>
</Style>
<Style id="transYellowPoly">
<LineStyle>
<width>1.5</width>
</LineStyle>
<PolyStyle>
<color>7d00ffff</color>
</PolyStyle>
</Style>
<Style id="noDrivingDirections">
<BalloonStyle>
<text><![CDATA[
<b>$[name]</b>
<br /><br />
$[description]
]]></text>
</BalloonStyle>
</Style>
<Folder>
<name>Placemarks</name>
<description>These are just some of the different kinds of placemarks with
which you can mark your favorite places</description>
<LookAt>
<longitude>-122.0839597145766</longitude>
<latitude>37.42222904525232</latitude>
<altitude>0</altitude>
<heading>-148.4122922628044</heading>
<tilt>40.5575073395506</tilt>
<range>500.6566641072245</range>
</LookAt>
<Placemark>
<name>Simple placemark</name>
<description>Attached to the ground. Intelligently places itself at the
height of the underlying terrain.</description>
<Point>
<coordinates>-122.0822035425683,37.42228990140251,0</coordinates>
</Point>
</Placemark>
<Placemark>
<name>Floating placemark</name>
<visibility>0</visibility>
<description>Floats a defined distance above the ground.</description>
<LookAt>
<longitude>-122.0839597145766</longitude>
<latitude>37.42222904525232</latitude>
<altitude>0</altitude>
<heading>-148.4122922628044</heading>
<tilt>40.5575073395506</tilt>
<range>500.6566641072245</range>
</LookAt>
<styleUrl>#downArrowIcon</styleUrl>
<Point>
<altitudeMode>relativeToGround</altitudeMode>
<coordinates>-122.084075,37.4220033612141,50</coordinates>
</Point>
</Placemark>
<Placemark>
<name>Extruded placemark</name>
<visibility>0</visibility>
<description>Tethered to the ground by a customizable
&quot;tail&quot;</description>
<LookAt>
<longitude>-122.0845787421525</longitude>
<latitude>37.42215078737763</latitude>
<altitude>0</altitude>
<heading>-148.4126684946234</heading>
<tilt>40.55750733918048</tilt>
<range>365.2646606980322</range>
</LookAt>
<styleUrl>#globeIcon</styleUrl>
<Point>
<extrude>1</extrude>
<altitudeMode>relativeToGround</altitudeMode>
<coordinates>-122.0857667006183,37.42156927867553,50</coordinates>
</Point>
</Placemark>
</Folder>
<Folder>
<name>Styles and Markup</name>
<visibility>0</visibility>
<description>With KML it is easy to create rich, descriptive markup to
annotate and enrich your placemarks</description>
<LookAt>
<longitude>-122.0845787422371</longitude>
<latitude>37.42215078726837</latitude>
<altitude>0</altitude>
<heading>-148.4126777488172</heading>
<tilt>40.55750733930874</tilt>
<range>365.2646826292919</range>
</LookAt>
<styleUrl>#noDrivingDirections</styleUrl>
<Document>
<name>Highlighted Icon</name>
<visibility>0</visibility>
<description>Place your mouse over the icon to see it display the new
icon</description>
<LookAt>
<longitude>-122.0856552124024</longitude>
<latitude>37.4224281311035</latitude>
<altitude>0</altitude>
<heading>0</heading>
<tilt>0</tilt>
<range>265.8520424250024</range>
</LookAt>
<Style id="highlightPlacemark">
<IconStyle>
<Icon>
<href>http://maps.google.com/mapfiles/kml/paddle/red-stars.png</href>
</Icon>
</IconStyle>
</Style>
<Style id="normalPlacemark">
<IconStyle>
<Icon>
<href>http://maps.google.com/mapfiles/kml/paddle/wht-blank.png</href>
</Icon>
</IconStyle>
</Style>
<StyleMap id="exampleStyleMap">
<Pair>
<key>normal</key>
<styleUrl>#normalPlacemark</styleUrl>
</Pair>
<Pair>
<key>highlight</key>
<styleUrl>#highlightPlacemark</styleUrl>
</Pair>
</StyleMap>
<Placemark>
<name>Roll over this icon</name>
<visibility>0</visibility>
<styleUrl>#exampleStyleMap</styleUrl>
<Point>
<coordinates>-122.0856545755255,37.42243077405461,0</coordinates>
</Point>
</Placemark>
</Document>
<Placemark>
<name>Descriptive HTML</name>
<visibility>0</visibility>
<description><![CDATA[Click on the blue link!<br><br>
Placemark descriptions can be enriched by using many standard HTML tags.<br>
For example:
<hr>
Styles:<br>
<i>Italics</i>,
<b>Bold</b>,
<u>Underlined</u>,
<s>Strike Out</s>,
subscript<sub>subscript</sub>,
superscript<sup>superscript</sup>,
<big>Big</big>,
<small>Small</small>,
<tt>Typewriter</tt>,
<em>Emphasized</em>,
<strong>Strong</strong>,
<code>Code</code>
<hr>
Fonts:<br>
<font color="red">red by name</font>,
<font color="#408010">leaf green by hexadecimal RGB</font>
<br>
<font size=1>size 1</font>,
<font size=2>size 2</font>,
<font size=3>size 3</font>,
<font size=4>size 4</font>,
<font size=5>size 5</font>,
<font size=6>size 6</font>,
<font size=7>size 7</font>
<br>
<font face=times>Times</font>,
<font face=verdana>Verdana</font>,
<font face=arial>Arial</font><br>
<hr>
Links:
<br>
<a href="http://earth.google.com/">Google Earth!</a>
<br>
or: Check out our website at www.google.com
<hr>
Alignment:<br>
<p align=left>left</p>
<p align=center>center</p>
<p align=right>right</p>
<hr>
Ordered Lists:<br>
<ol><li>First</li><li>Second</li><li>Third</li></ol>
<ol type="a"><li>First</li><li>Second</li><li>Third</li></ol>
<ol type="A"><li>First</li><li>Second</li><li>Third</li></ol>
<hr>
Unordered Lists:<br>
<ul><li>A</li><li>B</li><li>C</li></ul>
<ul type="circle"><li>A</li><li>B</li><li>C</li></ul>
<ul type="square"><li>A</li><li>B</li><li>C</li></ul>
<hr>
Definitions:<br>
<dl>
<dt>Google:</dt><dd>The best thing since sliced bread</dd>
</dl>
<hr>
Centered:<br><center>
Time present and time past<br>
Are both perhaps present in time future,<br>
And time future contained in time past.<br>
If all time is eternally present<br>
All time is unredeemable.<br>
</center>
<hr>
Block Quote:
<br>
<blockquote>
We shall not cease from exploration<br>
And the end of all our exploring<br>
Will be to arrive where we started<br>
And know the place for the first time.<br>
<i>-- T.S. Eliot</i>
</blockquote>
<br>
<hr>
Headings:<br>
<h1>Header 1</h1>
<h2>Header 2</h2>
<h3>Header 3</h3>
<h3>Header 4</h4>
<h3>Header 5</h5>
<hr>
Images:<br>
<i>Remote image</i><br>
<img src="//developers.google.com/kml/documentation/images/googleSample.png"><br>
<i>Scaled image</i><br>
<img src="//developers.google.com/kml/documentation/images/googleSample.png" width=100><br>
<hr>
Simple Tables:<br>
<table border="1" padding="1">
<tr><td>1</td><td>2</td><td>3</td><td>4</td><td>5</td></tr>
<tr><td>a</td><td>b</td><td>c</td><td>d</td><td>e</td></tr>
</table>
<br>
[Did you notice that double-clicking on the placemark doesn't cause the viewer to take you anywhere? This is because it is possible to directly author a "placeless placemark". If you look at the code for this example, you will see that it has neither a point coordinate nor a LookAt element.]]]></description>
</Placemark>
</Folder>
<Folder>
<name>Ground Overlays</name>
<visibility>0</visibility>
<description>Examples of ground overlays</description>
<GroundOverlay>
<name>Large-scale overlay on terrain</name>
<visibility>0</visibility>
<description>Overlay shows Mount Etna erupting on July 13th, 2001.</description>
<LookAt>
<longitude>15.02468937557116</longitude>
<latitude>37.67395167941667</latitude>
<altitude>0</altitude>
<heading>-16.5581842842829</heading>
<tilt>58.31228652890705</tilt>
<range>30350.36838438907</range>
</LookAt>
<Icon>
<href>http://developers.google.com/kml/documentation/images/etna.jpg</href>
</Icon>
<LatLonBox>
<north>37.91904192681665</north>
<south>37.46543388598137</south>
<east>15.35832653742206</east>
<west>14.60128369746704</west>
<rotation>-0.1556640799496235</rotation>
</LatLonBox>
</GroundOverlay>
</Folder>
<Folder>
<name>Screen Overlays</name>
<visibility>0</visibility>
<description>Screen overlays have to be authored directly in KML. These
examples illustrate absolute and dynamic positioning in screen space.</description>
<ScreenOverlay>
<name>Simple crosshairs</name>
<visibility>0</visibility>
<description>This screen overlay uses fractional positioning to put the
image in the exact center of the screen</description>
<Icon>
<href>http://developers.google.com/kml/documentation/images/crosshairs.png</href>
</Icon>
<overlayXY x="0.5" y="0.5" xunits="fraction" yunits="fraction"/>
<screenXY x="0.5" y="0.5" xunits="fraction" yunits="fraction"/>
<rotationXY x="0.5" y="0.5" xunits="fraction" yunits="fraction"/>
<size x="0" y="0" xunits="pixels" yunits="pixels"/>
</ScreenOverlay>
<ScreenOverlay>
<name>Absolute Positioning: Top left</name>
<visibility>0</visibility>
<Icon>
<href>http://developers.google.com/kml/documentation/images/top_left.jpg</href>
</Icon>
<overlayXY x="0" y="1" xunits="fraction" yunits="fraction"/>
<screenXY x="0" y="1" xunits="fraction" yunits="fraction"/>
<rotationXY x="0" y="0" xunits="fraction" yunits="fraction"/>
<size x="0" y="0" xunits="fraction" yunits="fraction"/>
</ScreenOverlay>
<ScreenOverlay>
<name>Absolute Positioning: Top right</name>
<visibility>0</visibility>
<Icon>
<href>http://developers.google.com/kml/documentation/images/top_right.jpg</href>
</Icon>
<overlayXY x="1" y="1" xunits="fraction" yunits="fraction"/>
<screenXY x="1" y="1" xunits="fraction" yunits="fraction"/>
<rotationXY x="0" y="0" xunits="fraction" yunits="fraction"/>
<size x="0" y="0" xunits="fraction" yunits="fraction"/>
</ScreenOverlay>
<ScreenOverlay>
<name>Absolute Positioning: Bottom left</name>
<visibility>0</visibility>
<Icon>
<href>http://developers.google.com/kml/documentation/images/bottom_left.jpg</href>
</Icon>
<overlayXY x="0" y="-1" xunits="fraction" yunits="fraction"/>
<screenXY x="0" y="0" xunits="fraction" yunits="fraction"/>
<rotationXY x="0" y="0" xunits="fraction" yunits="fraction"/>
<size x="0" y="0" xunits="fraction" yunits="fraction"/>
</ScreenOverlay>
<ScreenOverlay>
<name>Absolute Positioning: Bottom right</name>
<visibility>0</visibility>
<Icon>
<href>http://developers.google.com/kml/documentation/images/bottom_right.jpg</href>
</Icon>
<overlayXY x="1" y="-1" xunits="fraction" yunits="fraction"/>
<screenXY x="1" y="0" xunits="fraction" yunits="fraction"/>
<rotationXY x="0" y="0" xunits="fraction" yunits="fraction"/>
<size x="0" y="0" xunits="fraction" yunits="fraction"/>
</ScreenOverlay>
<ScreenOverlay>
<name>Dynamic Positioning: Top of screen</name>
<visibility>0</visibility>
<Icon>
<href>http://developers.google.com/kml/documentation/images/dynamic_screenoverlay.jpg</href>
</Icon>
<overlayXY x="0" y="1" xunits="fraction" yunits="fraction"/>
<screenXY x="0" y="1" xunits="fraction" yunits="fraction"/>
<rotationXY x="0" y="0" xunits="fraction" yunits="fraction"/>
<size x="1" y="0.2" xunits="fraction" yunits="fraction"/>
</ScreenOverlay>
<ScreenOverlay>
<name>Dynamic Positioning: Right of screen</name>
<visibility>0</visibility>
<Icon>
<href>http://developers.google.com/kml/documentation/images/dynamic_right.jpg</href>
</Icon>
<overlayXY x="1" y="1" xunits="fraction" yunits="fraction"/>
<screenXY x="1" y="1" xunits="fraction" yunits="fraction"/>
<rotationXY x="0" y="0" xunits="fraction" yunits="fraction"/>
<size x="0" y="1" xunits="fraction" yunits="fraction"/>
</ScreenOverlay>
</Folder>
<Folder>
<name>Paths</name>
<visibility>0</visibility>
<description>Examples of paths. Note that the tessellate tag is by default
set to 0. If you want to create tessellated lines, they must be authored
(or edited) directly in KML.</description>
<Placemark>
<name>Tessellated</name>
<visibility>0</visibility>
<description><![CDATA[If the <tessellate> tag has a value of 1, the line will contour to the underlying terrain]]></description>
<LookAt>
<longitude>-112.0822680013139</longitude>
<latitude>36.09825589333556</latitude>
<altitude>0</altitude>
<heading>103.8120432044965</heading>
<tilt>62.04855796276328</tilt>
<range>2889.145007690472</range>
</LookAt>
<LineString>
<tessellate>1</tessellate>
<coordinates> -112.0814237830345,36.10677870477137,0
-112.0870267752693,36.0905099328766,0 </coordinates>
</LineString>
</Placemark>
<Placemark>
<name>Untessellated</name>
<visibility>0</visibility>
<description><![CDATA[If the <tessellate> tag has a value of 0, the line follow a simple straight-line path from point to point]]></description>
<LookAt>
<longitude>-112.0822680013139</longitude>
<latitude>36.09825589333556</latitude>
<altitude>0</altitude>
<heading>103.8120432044965</heading>
<tilt>62.04855796276328</tilt>
<range>2889.145007690472</range>
</LookAt>
<LineString>
<tessellate>0</tessellate>
<coordinates> -112.080622229595,36.10673460007995,0
-112.085242575315,36.09049598612422,0 </coordinates>
</LineString>
</Placemark>
<Placemark>
<name>Absolute</name>
<visibility>0</visibility>
<description>Transparent purple line</description>
<LookAt>
<longitude>-112.2719329043177</longitude>
<latitude>36.08890633450894</latitude>
<altitude>0</altitude>
<heading>-106.8161545998597</heading>
<tilt>44.60763714063257</tilt>
<range>2569.386744398339</range>
</LookAt>
<styleUrl>#transPurpleLineGreenPoly</styleUrl>
<LineString>
<tessellate>1</tessellate>
<altitudeMode>absolute</altitudeMode>
<coordinates> -112.265654928602,36.09447672602546,2357
-112.2660384528238,36.09342608838671,2357
-112.2668139013453,36.09251058776881,2357
-112.2677826834445,36.09189827357996,2357
-112.2688557510952,36.0913137941187,2357
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-112.2670588176031,36.08682685262568,2357
-112.2657374587321,36.08646312301303,2357 </coordinates>
</LineString>
</Placemark>
<Placemark>
<name>Absolute Extruded</name>
<visibility>0</visibility>
<description>Transparent green wall with yellow outlines</description>
<LookAt>
<longitude>-112.2643334742529</longitude>
<latitude>36.08563154742419</latitude>
<altitude>0</altitude>
<heading>-125.7518698668815</heading>
<tilt>44.61038665812578</tilt>
<range>4451.842204068102</range>
</LookAt>
<styleUrl>#yellowLineGreenPoly</styleUrl>
<LineString>
<extrude>1</extrude>
<tessellate>1</tessellate>
<altitudeMode>absolute</altitudeMode>
<coordinates> -112.2550785337791,36.07954952145647,2357
-112.2549277039738,36.08117083492122,2357
-112.2552505069063,36.08260761307279,2357
-112.2564540158376,36.08395660588506,2357
-112.2580238976449,36.08511401044813,2357
-112.2595218489022,36.08584355239394,2357
-112.2608216347552,36.08612634548589,2357
-112.262073428656,36.08626019085147,2357
-112.2633204928495,36.08621519860091,2357
-112.2644963846444,36.08627897945274,2357
-112.2656969554589,36.08649599090644,2357 </coordinates>
</LineString>
</Placemark>
<Placemark>
<name>Relative</name>
<visibility>0</visibility>
<description>Black line (10 pixels wide), height tracks terrain</description>
<LookAt>
<longitude>-112.2580438551384</longitude>
<latitude>36.1072674824385</latitude>
<altitude>0</altitude>
<heading>4.947421249553717</heading>
<tilt>44.61324882043339</tilt>
<range>2927.61105910266</range>
</LookAt>
<styleUrl>#thickBlackLine</styleUrl>
<LineString>
<tessellate>1</tessellate>
<altitudeMode>relativeToGround</altitudeMode>
<coordinates> -112.2532845153347,36.09886943729116,645
-112.2540466121145,36.09919570465255,645
-112.254734666947,36.09984998366178,645
-112.255493345654,36.10051310621746,645
-112.2563157098468,36.10108441943419,645
-112.2568033076439,36.10159722088088,645
-112.257494011321,36.10204323542867,645
-112.2584106072308,36.10229131995655,645
-112.2596588987972,36.10240001286358,645
-112.2610581199487,36.10213176873407,645
-112.2626285262793,36.10157011437219,645 </coordinates>
</LineString>
</Placemark>
<Placemark>
<name>Relative Extruded</name>
<visibility>0</visibility>
<description>Opaque blue walls with red outline, height tracks terrain</description>
<LookAt>
<longitude>-112.2683594333433</longitude>
<latitude>36.09884362144909</latitude>
<altitude>0</altitude>
<heading>-72.24271551768405</heading>
<tilt>44.60855445139561</tilt>
<range>2184.193522571467</range>
</LookAt>
<styleUrl>#redLineBluePoly</styleUrl>
<LineString>
<extrude>1</extrude>
<tessellate>1</tessellate>
<altitudeMode>relativeToGround</altitudeMode>
<coordinates> -112.2656634181359,36.09445214722695,630
-112.2652238941097,36.09520916122063,630
-112.2645079986395,36.09580763864907,630
-112.2638827428817,36.09628572284063,630
-112.2635746835406,36.09679275951239,630
-112.2635711822407,36.09740038871899,630
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</LineString>
</Placemark>
</Folder>
<Folder>
<name>Polygons</name>
<visibility>0</visibility>
<description>Examples of polygon shapes</description>
<Folder>
<name>Google Campus</name>
<visibility>0</visibility>
<description>A collection showing how easy it is to create 3-dimensional
buildings</description>
<LookAt>
<longitude>-122.084120030116</longitude>
<latitude>37.42174011925477</latitude>
<altitude>0</altitude>
<heading>-34.82469740081282</heading>
<tilt>53.454348562403</tilt>
<range>276.7870053764046</range>
</LookAt>
<Placemark>
<name>Building 40</name>
<visibility>0</visibility>
<styleUrl>#transRedPoly</styleUrl>
<Polygon>
<extrude>1</extrude>
<altitudeMode>relativeToGround</altitudeMode>
<outerBoundaryIs>
<LinearRing>
<coordinates> -122.0848938459612,37.42257124044786,17
-122.0849580979198,37.42211922626856,17
-122.0847469573047,37.42207183952619,17
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</LinearRing>
</outerBoundaryIs>
</Polygon>
</Placemark>
<Placemark>
<name>Building 41</name>
<visibility>0</visibility>
<styleUrl>#transBluePoly</styleUrl>
<Polygon>
<extrude>1</extrude>
<altitudeMode>relativeToGround</altitudeMode>
<outerBoundaryIs>
<LinearRing>
<coordinates> -122.0857412771483,37.42227033155257,17
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</LinearRing>
</outerBoundaryIs>
</Polygon>
</Placemark>
<Placemark>
<name>Building 42</name>
<visibility>0</visibility>
<styleUrl>#transGreenPoly</styleUrl>
<Polygon>
<extrude>1</extrude>
<altitudeMode>relativeToGround</altitudeMode>
<outerBoundaryIs>
<LinearRing>
<coordinates> -122.0857862287242,37.42136208886969,25
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</LinearRing>
</outerBoundaryIs>
</Polygon>
</Placemark>
<Placemark>
<name>Building 43</name>
<visibility>0</visibility>
<styleUrl>#transYellowPoly</styleUrl>
<Polygon>
<extrude>1</extrude>
<altitudeMode>relativeToGround</altitudeMode>
<outerBoundaryIs>
<LinearRing>
<coordinates> -122.0844371128284,37.42177253003091,19
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</LinearRing>
</outerBoundaryIs>
</Polygon>
</Placemark>
</Folder>
<Folder>
<name>Extruded Polygon</name>
<description>A simple way to model a building</description>
<Placemark>
<name>The Pentagon</name>
<LookAt>
<longitude>-77.05580139178142</longitude>
<latitude>38.870832443487</latitude>
<heading>59.88865561738225</heading>
<tilt>48.09646074797388</tilt>
<range>742.0552506670548</range>
</LookAt>
<Polygon>
<extrude>1</extrude>
<altitudeMode>relativeToGround</altitudeMode>
<outerBoundaryIs>
<LinearRing>
<coordinates> -77.05788457660967,38.87253259892824,100
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</outerBoundaryIs>
<innerBoundaryIs>
<LinearRing>
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<name>Monaco</name>
<Placemark>
<Point>
<coordinates>7.454787,43.75875</coordinates>
</Point>
<Style>
<IconStyle>
<hotSpot x="0.5" y="0" xunits="fraction" yunits="fraction"></hotSpot>
<Icon>
<href>https://maps.google.com/mapfiles/kml/paddle/ylw-stars.png</href>
</Icon>
</IconStyle>
</Style>
</Placemark>
<Style>
<ListStyle>
<listItemType>checkHideChildren</listItemType>
</ListStyle>
</Style>
</Folder>
</Folder>
</Document>
</kml>

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{
"name": "leaflet-kml",
"version": "1.0.1",
"description": "Leaflet KML layer plugin",
"main": "L.KML.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"repository": {
"type": "git",
"url": "git+https://github.com/windycom/leaflet-kml.git"
},
"author": "Pavel Shramov, Bruno Bergot",
"license": "MIT",
"bugs": {
"url": "https://github.com/windycom/leaflet-kml/issues"
},
"homepage": "https://github.com/windycom/leaflet-kml#readme"
}

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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.8.0/dist/leaflet.css">
<script src="https://unpkg.com/leaflet@1.8.0/dist/leaflet.js"></script>
<link rel="stylesheet" href="https://rawgit.com/Leaflet/Leaflet.draw/v1.0.4/dist/leaflet.draw.css">
<script src="https://rawgit.com/Leaflet/Leaflet.draw/v1.0.4/dist/leaflet.draw-src.js"></script>
<script src="https://unpkg.com/togeojson@0.16.0"></script>
<script src="https://unpkg.com/leaflet-filelayer@1.2.0"></script>
<!--script type="text/javascript" src="https://getfirebug.com/firebug-lite.js"></script-->
<script type="text/javascript" src="./qwebchannel.js"></script>
<style>
body { padding: 0; margin: 0; }
html, body, #map { height: 100%; }
#delete, #export {
position: absolute;
top:50px;
right:10px;
z-index:100;
background:white;
color:black;
padding:6px;
border-radius:4px;
font-family: 'Helvetica Neue';
cursor: pointer;
font-size:12px;
text-decoration:none;
}
#export {
top:90px;
}
</style>
</head>
<body>
<div id="map" style="width: 100%; height: 100%; display: block;"></div>
</body>
</html>

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var OpenStreetMap = L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
});
var googleStreets = L.tileLayer('http://{s}.google.com/vt/lyrs=m&x={x}&y={y}&z={z}',{
subdomains:['mt0','mt1','mt2','mt3']
});
var googleSat = L.tileLayer('http://{s}.google.com/vt/lyrs=s&x={x}&y={y}&z={z}',{
subdomains:['mt0','mt1','mt2','mt3']
});
var googleHybrid = L.tileLayer('http://{s}.google.com/vt/lyrs=s,h&x={x}&y={y}&z={z}',{
subdomains:['mt0','mt1','mt2','mt3']
});
var map = L.map('map', {
center: [0,0],
zoom: 3,
layers: [OpenStreetMap, googleSat, googleHybrid]
});
var baseMaps = {
"OSM": OpenStreetMap,
"Satelite": googleSat,
"Hybrid": googleHybrid
};
L.control.layers(baseMaps).addTo(map);
L.control.scale().addTo(map);
var MyApp;
new QWebChannel(qt.webChannelTransport, function (channel)
{
MyApp = channel.objects.MyApp;
});
map.on('mousemove', function(e)
{
MyApp.onMapMove(e.latlng.lat, e.latlng.lng)
});
var DrawShapes;
var drawnItems = new L.FeatureGroup();
map.addLayer(drawnItems);
var drawControl = new L.Control.Draw({
draw:
{
position: 'topleft',
polygon:
{
allowIntersection: false,
drawError:
{
color: '#b00b00',
message: '<strong>Polygon draw does not allow intersections!<strong> (allowIntersection: false)',
timeout: 1000
},
shapeOptions:
{
color: '#bada55'
},
showArea: true
},
circle: {
shapeOptions: {
color: '#662d91'
}
},
circle:true,
circlemarker:false,
polyline: true,
rectangle: true,
marker: true,
},
edit: {
featureGroup: drawnItems
}
});
map.addControl(drawControl);
map.on('draw:created', function(e)
{
var type = e.layerType;
var layer = e.layer;
var feature = layer.feature = layer.feature || {};
feature.type = feature.type || "Feature";
var props = feature.properties = feature.properties || {};
var geoJSON = layer.toGeoJSON();
if (type === 'marker')
{
geoJSON.properties.name = "Circle";
geoJSON.properties.geo = false;
addPopup(layer);
}
else if (type === "circle")
{
var radius = layer.getRadius();
geoJSON.properties.name = "Circle";
geoJSON.properties.radius = radius;
geoJSON.properties.geo = true;
addPopup(layer);
}
else
{
geoJSON.properties.name = "Area";
geoJSON.properties.Prohibited = false;
addPopup(layer);
}
drawnItems.addLayer(layer);
});
function addPopup(layer)
{
var content = createCustomElementFromProperties(layer.feature.properties);
content.addEventListener("keyup", function ()
{
layer.feature.properties = RetrieveObjFromCustomElement(content);
});
layer.on("popupopen", function ()
{
content = FillCustomElementFromProperties(layer.feature.properties, content);
content.focus();
});
layer.bindPopup(content).openPopup();
}
function createCustomElementFromProperties(properties)
{
var content = document.createElement("div");
for(var property in properties)
{
var part = document.createElement("div");
content.appendChild(part)
var label = document.createElement('label')
label.htmlFor = "id";
label.appendChild(document.createTextNode('Etiqueta: '));
var tmpnode = document.createElement("input")
if (typeof properties[property] == "boolean")
tmpnode.type = "checkbox"
tmpnode.value = properties[property]
tmpnode.value = properties[property]
tmpnode.j_type = property
part.appendChild(tmpnode)
part.appendChild(label)
}
return content
}
function RetrieveObjFromCustomElement(custom_element)
{
var tmpobj = {};
for(var i = 0; i < custom_element.childNodes.length; i++)
{
var j_type = custom_element.childNodes[i].j_type
tmpobj[j_type] = custom_element.childNodes[i].value
}
return tmpobj
}
function FillCustomElementFromProperties(tmpobject, custom_element)
{
for(var i = 0; i < custom_element.childNodes.length; i++)
{
var j_type = custom_element.childNodes[i].j_type
custom_element.childNodes[i].value = tmpobject[j_type]
}
return custom_element
}
// create a red polygon from an array of LatLng points
/*var latlngs = [[37, -109.05],[41, -109.03],[41, -102.05],[37, -102.04]];
var polygon = L.polygon(latlngs, {color: 'red'});
drawnItems.addLayer(polygon);
var latlngs = [[37, -109.05],[41, -102.05]];
var polygon = L.rectangle(latlngs, {color: 'red'});
drawnItems.addLayer(polygon);
map.fitBounds(polygon.getBounds());*/

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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Copyright (C) 2014 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Milian Wolff <milian.wolff@kdab.com>
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWebChannel module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
"use strict";
var QWebChannelMessageTypes = {
signal: 1,
propertyUpdate: 2,
init: 3,
idle: 4,
debug: 5,
invokeMethod: 6,
connectToSignal: 7,
disconnectFromSignal: 8,
setProperty: 9,
response: 10,
};
var QWebChannel = function(transport, initCallback)
{
if (typeof transport !== "object" || typeof transport.send !== "function") {
console.error("The QWebChannel expects a transport object with a send function and onmessage callback property." +
" Given is: transport: " + typeof(transport) + ", transport.send: " + typeof(transport.send));
return;
}
var channel = this;
this.transport = transport;
this.send = function(data)
{
if (typeof(data) !== "string") {
data = JSON.stringify(data);
}
channel.transport.send(data);
}
this.transport.onmessage = function(message)
{
var data = message.data;
if (typeof data === "string") {
data = JSON.parse(data);
}
switch (data.type) {
case QWebChannelMessageTypes.signal:
channel.handleSignal(data);
break;
case QWebChannelMessageTypes.response:
channel.handleResponse(data);
break;
case QWebChannelMessageTypes.propertyUpdate:
channel.handlePropertyUpdate(data);
break;
default:
console.error("invalid message received:", message.data);
break;
}
}
this.execCallbacks = {};
this.execId = 0;
this.exec = function(data, callback)
{
if (!callback) {
// if no callback is given, send directly
channel.send(data);
return;
}
if (channel.execId === Number.MAX_VALUE) {
// wrap
channel.execId = Number.MIN_VALUE;
}
if (data.hasOwnProperty("id")) {
console.error("Cannot exec message with property id: " + JSON.stringify(data));
return;
}
data.id = channel.execId++;
channel.execCallbacks[data.id] = callback;
channel.send(data);
};
this.objects = {};
this.handleSignal = function(message)
{
var object = channel.objects[message.object];
if (object) {
object.signalEmitted(message.signal, message.args);
} else {
console.warn("Unhandled signal: " + message.object + "::" + message.signal);
}
}
this.handleResponse = function(message)
{
if (!message.hasOwnProperty("id")) {
console.error("Invalid response message received: ", JSON.stringify(message));
return;
}
channel.execCallbacks[message.id](message.data);
delete channel.execCallbacks[message.id];
}
this.handlePropertyUpdate = function(message)
{
for (var i in message.data) {
var data = message.data[i];
var object = channel.objects[data.object];
if (object) {
object.propertyUpdate(data.signals, data.properties);
} else {
console.warn("Unhandled property update: " + data.object + "::" + data.signal);
}
}
channel.exec({type: QWebChannelMessageTypes.idle});
}
this.debug = function(message)
{
channel.send({type: QWebChannelMessageTypes.debug, data: message});
};
channel.exec({type: QWebChannelMessageTypes.init}, function(data) {
for (var objectName in data) {
var object = new QObject(objectName, data[objectName], channel);
}
// now unwrap properties, which might reference other registered objects
for (var objectName in channel.objects) {
channel.objects[objectName].unwrapProperties();
}
if (initCallback) {
initCallback(channel);
}
channel.exec({type: QWebChannelMessageTypes.idle});
});
};
function QObject(name, data, webChannel)
{
this.__id__ = name;
webChannel.objects[name] = this;
// List of callbacks that get invoked upon signal emission
this.__objectSignals__ = {};
// Cache of all properties, updated when a notify signal is emitted
this.__propertyCache__ = {};
var object = this;
// ----------------------------------------------------------------------
this.unwrapQObject = function(response)
{
if (response instanceof Array) {
// support list of objects
var ret = new Array(response.length);
for (var i = 0; i < response.length; ++i) {
ret[i] = object.unwrapQObject(response[i]);
}
return ret;
}
if (!response
|| !response["__QObject*__"]
|| response.id === undefined) {
return response;
}
var objectId = response.id;
if (webChannel.objects[objectId])
return webChannel.objects[objectId];
if (!response.data) {
console.error("Cannot unwrap unknown QObject " + objectId + " without data.");
return;
}
var qObject = new QObject( objectId, response.data, webChannel );
qObject.destroyed.connect(function() {
if (webChannel.objects[objectId] === qObject) {
delete webChannel.objects[objectId];
// reset the now deleted QObject to an empty {} object
// just assigning {} though would not have the desired effect, but the
// below also ensures all external references will see the empty map
// NOTE: this detour is necessary to workaround QTBUG-40021
var propertyNames = [];
for (var propertyName in qObject) {
propertyNames.push(propertyName);
}
for (var idx in propertyNames) {
delete qObject[propertyNames[idx]];
}
}
});
// here we are already initialized, and thus must directly unwrap the properties
qObject.unwrapProperties();
return qObject;
}
this.unwrapProperties = function()
{
for (var propertyIdx in object.__propertyCache__) {
object.__propertyCache__[propertyIdx] = object.unwrapQObject(object.__propertyCache__[propertyIdx]);
}
}
function addSignal(signalData, isPropertyNotifySignal)
{
var signalName = signalData[0];
var signalIndex = signalData[1];
object[signalName] = {
connect: function(callback) {
if (typeof(callback) !== "function") {
console.error("Bad callback given to connect to signal " + signalName);
return;
}
object.__objectSignals__[signalIndex] = object.__objectSignals__[signalIndex] || [];
object.__objectSignals__[signalIndex].push(callback);
if (!isPropertyNotifySignal && signalName !== "destroyed") {
// only required for "pure" signals, handled separately for properties in propertyUpdate
// also note that we always get notified about the destroyed signal
webChannel.exec({
type: QWebChannelMessageTypes.connectToSignal,
object: object.__id__,
signal: signalIndex
});
}
},
disconnect: function(callback) {
if (typeof(callback) !== "function") {
console.error("Bad callback given to disconnect from signal " + signalName);
return;
}
object.__objectSignals__[signalIndex] = object.__objectSignals__[signalIndex] || [];
var idx = object.__objectSignals__[signalIndex].indexOf(callback);
if (idx === -1) {
console.error("Cannot find connection of signal " + signalName + " to " + callback.name);
return;
}
object.__objectSignals__[signalIndex].splice(idx, 1);
if (!isPropertyNotifySignal && object.__objectSignals__[signalIndex].length === 0) {
// only required for "pure" signals, handled separately for properties in propertyUpdate
webChannel.exec({
type: QWebChannelMessageTypes.disconnectFromSignal,
object: object.__id__,
signal: signalIndex
});
}
}
};
}
/**
* Invokes all callbacks for the given signalname. Also works for property notify callbacks.
*/
function invokeSignalCallbacks(signalName, signalArgs)
{
var connections = object.__objectSignals__[signalName];
if (connections) {
connections.forEach(function(callback) {
callback.apply(callback, signalArgs);
});
}
}
this.propertyUpdate = function(signals, propertyMap)
{
// update property cache
for (var propertyIndex in propertyMap) {
var propertyValue = propertyMap[propertyIndex];
object.__propertyCache__[propertyIndex] = propertyValue;
}
for (var signalName in signals) {
// Invoke all callbacks, as signalEmitted() does not. This ensures the
// property cache is updated before the callbacks are invoked.
invokeSignalCallbacks(signalName, signals[signalName]);
}
}
this.signalEmitted = function(signalName, signalArgs)
{
invokeSignalCallbacks(signalName, signalArgs);
}
function addMethod(methodData)
{
var methodName = methodData[0];
var methodIdx = methodData[1];
object[methodName] = function() {
var args = [];
var callback;
for (var i = 0; i < arguments.length; ++i) {
if (typeof arguments[i] === "function")
callback = arguments[i];
else
args.push(arguments[i]);
}
webChannel.exec({
"type": QWebChannelMessageTypes.invokeMethod,
"object": object.__id__,
"method": methodIdx,
"args": args
}, function(response) {
if (response !== undefined) {
var result = object.unwrapQObject(response);
if (callback) {
(callback)(result);
}
}
});
};
}
function bindGetterSetter(propertyInfo)
{
var propertyIndex = propertyInfo[0];
var propertyName = propertyInfo[1];
var notifySignalData = propertyInfo[2];
// initialize property cache with current value
// NOTE: if this is an object, it is not directly unwrapped as it might
// reference other QObject that we do not know yet
object.__propertyCache__[propertyIndex] = propertyInfo[3];
if (notifySignalData) {
if (notifySignalData[0] === 1) {
// signal name is optimized away, reconstruct the actual name
notifySignalData[0] = propertyName + "Changed";
}
addSignal(notifySignalData, true);
}
Object.defineProperty(object, propertyName, {
configurable: true,
get: function () {
var propertyValue = object.__propertyCache__[propertyIndex];
if (propertyValue === undefined) {
// This shouldn't happen
console.warn("Undefined value in property cache for property \"" + propertyName + "\" in object " + object.__id__);
}
return propertyValue;
},
set: function(value) {
if (value === undefined) {
console.warn("Property setter for " + propertyName + " called with undefined value!");
return;
}
object.__propertyCache__[propertyIndex] = value;
webChannel.exec({
"type": QWebChannelMessageTypes.setProperty,
"object": object.__id__,
"property": propertyIndex,
"value": value
});
}
});
}
// ----------------------------------------------------------------------
data.methods.forEach(addMethod);
data.properties.forEach(bindGetterSetter);
data.signals.forEach(function(signal) { addSignal(signal, false); });
for (var name in data.enums) {
object[name] = data.enums[name];
}
}
//required for use with nodejs
if (typeof module === 'object') {
module.exports = {
QWebChannel: QWebChannel
};
}