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Added support for KML IconStyle scale and BalloonStyle text #197

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Added support for KML IconStyle scale and BalloonStyle text #197

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92 changes: 71 additions & 21 deletions layer/vector/KML.js
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Original file line number Diff line number Diff line change
Expand Up @@ -105,7 +105,7 @@ L.Util.extend(L.KML, {
}
return !e || e === folder;
},

parseStyles: function(xml) {
var styles = {};
var sl = xml.getElementsByTagName('Style');
Expand All @@ -122,16 +122,15 @@ L.Util.extend(L.KML, {
parseStyle: function (xml) {
var style = {}, poptions = {}, ioptions = {}, el, id;

var attributes = { color: true, width: true, Icon: true, href: true, hotSpot: true };
var attributes = { color: true, width: true, Icon: true, href: true, hotSpot: true, scale: 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')
{
if (key === 'hotSpot') {
for (var j = 0; j < e.attributes.length; j++) {
options[e.attributes[j].name] = e.attributes[j].nodeValue;
}
Expand All @@ -140,19 +139,52 @@ L.Util.extend(L.KML, {
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 === 'bgColor' || key == 'textColor') {
options[key] = '#' + value.substring(6, 8) + value.substring(4, 6) + value.substring(2, 4);
} else if (key === 'width') {
options.weight = value;
} else if (key === 'Icon') {
ioptions = _parse(e);
if (ioptions.href) { options.href = ioptions.href; }
if (ioptions.scale) { options.scale = ioptions.scale; }
} else if (key === 'href') {
options.href = value;
} else if (key === 'scale') {
options.scale = parseFloat(value);
}
}
}
return options;
}


function _abgr2rgba(kml_abgr) {
var a = parseInt(kml_abgr.substring(0, 2), 16) / 255.0;
var r = parseInt(kml_abgr.substring(6, 8), 16);
var g = parseInt(kml_abgr.substring(4, 6), 16);
var b = parseInt(kml_abgr.substring(2, 4), 16);
return 'rgba(' + r + ',' + g + ',' + b + ',' + a + ')';
}

function _parseBalloonStyle(xml) {
var options = {};
for (var i = 0; i < xml.childNodes.length; i++) {
var e = xml.childNodes[i];
var key = e.tagName;
var value = e.childNodes[0] ? e.childNodes[0].nodeValue : null;
if (key === 'bgColor' || key == 'textColor') {
options[key] = _abgr2rgba(value);
} else if (key === 'text') {
options.text = value;
} else if (key === 'displayMode') {
options.displayModeHide = (value === "hide");
}
}

return options;
}

// TODO we also need LabelStyle handled

el = xml.getElementsByTagName('LineStyle');
if (el && el[0]) { style = _parse(el[0]); }
el = xml.getElementsByTagName('PolyStyle');
Expand All @@ -162,13 +194,21 @@ L.Util.extend(L.KML, {
el = xml.getElementsByTagName('IconStyle');
if (el && el[0]) { ioptions = _parse(el[0]); }
if (ioptions.href) {
style.icon = new L.KMLIcon({
var iconopts = {
iconUrl: ioptions.href,
shadowUrl: null,
anchorRef: {x: ioptions.x, y: ioptions.y},
anchorType: {x: ioptions.xunits, y: ioptions.yunits}
});
};
if (ioptions.scale) {
// TODO should consider the original proportion
var scale = ioptions.scale ? ioptions.scale : 1.0;
iconopts.iconSize = [ 32 * scale, 32 * scale ];
}
style.icon = new L.KMLIcon(iconopts);
}
el = xml.getElementsByTagName('BalloonStyle');
if (el && el[0]) { style.popup = _parseBalloonStyle(el[0]); }

id = xml.getAttribute('id');
if (id && style) {
Expand Down Expand Up @@ -273,24 +313,34 @@ L.Util.extend(L.KML, {
layer = new L.FeatureGroup(layers);
}

var 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) {
if (! (options.popup && options.popup.displayModeHide)) {
layer.on('add', function(e) {
layer.bindPopup('<h2>' + name + '</h2>' + descr);
if (options.popup && options.popup.text) {
// TODO should replace $[name], $[description], $[address], $[id], $[Snippet]
// c.f. https://developers.google.com/kml/documentation/kmlreference#balloonstyle
layer.bindPopup(options.popup.text, options.popup);
} else {
var 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 (descr) {
// GoogleEarth shows it only when description is set
layer.bindPopup('<b>' + name + '</b><br/>' + descr, options.popup ? options.popup : {});
}
}
});
}

// TODO we also need a label from its name

return layer;
},

Expand Down