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KML.js
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KML.js
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/**
* @module ol/format/KML
*/
import Feature from '../Feature.js';
import Fill from '../style/Fill.js';
import GeometryCollection from '../geom/GeometryCollection.js';
import GeometryLayout from '../geom/GeometryLayout.js';
import GeometryType from '../geom/GeometryType.js';
import Icon from '../style/Icon.js';
import IconAnchorUnits from '../style/IconAnchorUnits.js';
import IconOrigin from '../style/IconOrigin.js';
import LineString from '../geom/LineString.js';
import MultiLineString from '../geom/MultiLineString.js';
import MultiPoint from '../geom/MultiPoint.js';
import MultiPolygon from '../geom/MultiPolygon.js';
import Point from '../geom/Point.js';
import Polygon from '../geom/Polygon.js';
import Stroke from '../style/Stroke.js';
import Style from '../style/Style.js';
import Text from '../style/Text.js';
import XMLFeature from './XMLFeature.js';
import {
OBJECT_PROPERTY_NODE_FACTORY,
XML_SCHEMA_INSTANCE_URI,
createElementNS,
getAllTextContent,
isDocument,
makeArrayExtender,
makeArrayPusher,
makeChildAppender,
makeObjectPropertySetter,
makeReplacer,
makeSequence,
makeSimpleNodeFactory,
makeStructureNS,
parse,
parseNode,
pushParseAndPop,
pushSerializeAndPop,
} from '../xml.js';
import {asArray} from '../color.js';
import {assert} from '../asserts.js';
import {extend, includes} from '../array.js';
import {get as getProjection} from '../proj.js';
import {
readBoolean,
readDecimal,
readString,
writeBooleanTextNode,
writeCDATASection,
writeDecimalTextNode,
writeStringTextNode,
} from './xsd.js';
import {toRadians} from '../math.js';
import {transformGeometryWithOptions} from './Feature.js';
/**
* @typedef {Object} Vec2
* @property {number} x X coordinate.
* @property {import("../style/IconAnchorUnits").default} xunits Units of x.
* @property {number} y Y coordinate.
* @property {import("../style/IconAnchorUnits").default} yunits Units of Y.
* @property {import("../style/IconOrigin.js").default} [origin] Origin.
*/
/**
* @typedef {Object} GxTrackObject
* @property {Array<Array<number>>} coordinates Coordinates.
* @property {Array<number>} whens Whens.
*/
/**
* @const
* @type {Array<string>}
*/
const GX_NAMESPACE_URIS = ['http://www.google.com/kml/ext/2.2'];
/**
* @const
* @type {Array<null|string>}
*/
const NAMESPACE_URIS = [
null,
'http://earth.google.com/kml/2.0',
'http://earth.google.com/kml/2.1',
'http://earth.google.com/kml/2.2',
'http://www.opengis.net/kml/2.2',
];
/**
* @const
* @type {string}
*/
const SCHEMA_LOCATION =
'http://www.opengis.net/kml/2.2 ' +
'https://developers.google.com/kml/schema/kml22gx.xsd';
/**
* @type {Object<string, import("../style/IconAnchorUnits").default>}
*/
const ICON_ANCHOR_UNITS_MAP = {
'fraction': IconAnchorUnits.FRACTION,
'pixels': IconAnchorUnits.PIXELS,
'insetPixels': IconAnchorUnits.PIXELS,
};
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Parser>>}
*/
// @ts-ignore
const PLACEMARK_PARSERS = makeStructureNS(
NAMESPACE_URIS,
{
'ExtendedData': extendedDataParser,
'Region': regionParser,
'MultiGeometry': makeObjectPropertySetter(readMultiGeometry, 'geometry'),
'LineString': makeObjectPropertySetter(readLineString, 'geometry'),
'LinearRing': makeObjectPropertySetter(readLinearRing, 'geometry'),
'Point': makeObjectPropertySetter(readPoint, 'geometry'),
'Polygon': makeObjectPropertySetter(readPolygon, 'geometry'),
'Style': makeObjectPropertySetter(readStyle),
'StyleMap': placemarkStyleMapParser,
'address': makeObjectPropertySetter(readString),
'description': makeObjectPropertySetter(readString),
'name': makeObjectPropertySetter(readString),
'open': makeObjectPropertySetter(readBoolean),
'phoneNumber': makeObjectPropertySetter(readString),
'styleUrl': makeObjectPropertySetter(readStyleURL),
'visibility': makeObjectPropertySetter(readBoolean),
},
makeStructureNS(GX_NAMESPACE_URIS, {
'MultiTrack': makeObjectPropertySetter(readGxMultiTrack, 'geometry'),
'Track': makeObjectPropertySetter(readGxTrack, 'geometry'),
})
);
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Parser>>}
*/
// @ts-ignore
const NETWORK_LINK_PARSERS = makeStructureNS(NAMESPACE_URIS, {
'ExtendedData': extendedDataParser,
'Region': regionParser,
'Link': linkParser,
'address': makeObjectPropertySetter(readString),
'description': makeObjectPropertySetter(readString),
'name': makeObjectPropertySetter(readString),
'open': makeObjectPropertySetter(readBoolean),
'phoneNumber': makeObjectPropertySetter(readString),
'visibility': makeObjectPropertySetter(readBoolean),
});
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Parser>>}
*/
// @ts-ignore
const LINK_PARSERS = makeStructureNS(NAMESPACE_URIS, {
'href': makeObjectPropertySetter(readURI),
});
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Parser>>}
*/
// @ts-ignore
const REGION_PARSERS = makeStructureNS(NAMESPACE_URIS, {
'LatLonAltBox': latLonAltBoxParser,
'Lod': lodParser,
});
/**
* @const
* @type {Object<string, Array<string>>}
*/
// @ts-ignore
const KML_SEQUENCE = makeStructureNS(NAMESPACE_URIS, ['Document', 'Placemark']);
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Serializer>>}
*/
// @ts-ignore
const KML_SERIALIZERS = makeStructureNS(NAMESPACE_URIS, {
'Document': makeChildAppender(writeDocument),
'Placemark': makeChildAppender(writePlacemark),
});
/**
* @type {import("../color.js").Color}
*/
let DEFAULT_COLOR;
/**
* @type {Fill}
*/
let DEFAULT_FILL_STYLE = null;
/**
* Get the default fill style (or null if not yet set).
* @return {Fill} The default fill style.
*/
export function getDefaultFillStyle() {
return DEFAULT_FILL_STYLE;
}
/**
* @type {import("../size.js").Size}
*/
let DEFAULT_IMAGE_STYLE_ANCHOR;
/**
* @type {import("../style/IconAnchorUnits").default}
*/
let DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS;
/**
* @type {import("../style/IconAnchorUnits").default}
*/
let DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS;
/**
* @type {import("../size.js").Size}
*/
let DEFAULT_IMAGE_STYLE_SIZE;
/**
* @type {string}
*/
let DEFAULT_IMAGE_STYLE_SRC;
/**
* @type {number}
*/
let DEFAULT_IMAGE_SCALE_MULTIPLIER;
/**
* @type {import("../style/Image.js").default}
*/
let DEFAULT_IMAGE_STYLE = null;
/**
* Get the default image style (or null if not yet set).
* @return {import("../style/Image.js").default} The default image style.
*/
export function getDefaultImageStyle() {
return DEFAULT_IMAGE_STYLE;
}
/**
* @type {string}
*/
let DEFAULT_NO_IMAGE_STYLE;
/**
* @type {Stroke}
*/
let DEFAULT_STROKE_STYLE = null;
/**
* Get the default stroke style (or null if not yet set).
* @return {Stroke} The default stroke style.
*/
export function getDefaultStrokeStyle() {
return DEFAULT_STROKE_STYLE;
}
/**
* @type {Stroke}
*/
let DEFAULT_TEXT_STROKE_STYLE;
/**
* @type {Text}
*/
let DEFAULT_TEXT_STYLE = null;
/**
* Get the default text style (or null if not yet set).
* @return {Text} The default text style.
*/
export function getDefaultTextStyle() {
return DEFAULT_TEXT_STYLE;
}
/**
* @type {Style}
*/
let DEFAULT_STYLE = null;
/**
* Get the default style (or null if not yet set).
* @return {Style} The default style.
*/
export function getDefaultStyle() {
return DEFAULT_STYLE;
}
/**
* @type {Array<Style>}
*/
let DEFAULT_STYLE_ARRAY = null;
/**
* Get the default style array (or null if not yet set).
* @return {Array<Style>} The default style.
*/
export function getDefaultStyleArray() {
return DEFAULT_STYLE_ARRAY;
}
function createStyleDefaults() {
DEFAULT_COLOR = [255, 255, 255, 1];
DEFAULT_FILL_STYLE = new Fill({
color: DEFAULT_COLOR,
});
DEFAULT_IMAGE_STYLE_ANCHOR = [20, 2]; // FIXME maybe [8, 32] ?
DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS = IconAnchorUnits.PIXELS;
DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS = IconAnchorUnits.PIXELS;
DEFAULT_IMAGE_STYLE_SIZE = [64, 64];
DEFAULT_IMAGE_STYLE_SRC =
'https://maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png';
DEFAULT_IMAGE_SCALE_MULTIPLIER = 0.5;
DEFAULT_IMAGE_STYLE = new Icon({
anchor: DEFAULT_IMAGE_STYLE_ANCHOR,
anchorOrigin: IconOrigin.BOTTOM_LEFT,
anchorXUnits: DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS,
anchorYUnits: DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS,
crossOrigin: 'anonymous',
rotation: 0,
scale: DEFAULT_IMAGE_SCALE_MULTIPLIER,
size: DEFAULT_IMAGE_STYLE_SIZE,
src: DEFAULT_IMAGE_STYLE_SRC,
});
DEFAULT_NO_IMAGE_STYLE = 'NO_IMAGE';
DEFAULT_STROKE_STYLE = new Stroke({
color: DEFAULT_COLOR,
width: 1,
});
DEFAULT_TEXT_STROKE_STYLE = new Stroke({
color: [51, 51, 51, 1],
width: 2,
});
DEFAULT_TEXT_STYLE = new Text({
font: 'bold 16px Helvetica',
fill: DEFAULT_FILL_STYLE,
stroke: DEFAULT_TEXT_STROKE_STYLE,
scale: 0.8,
});
DEFAULT_STYLE = new Style({
fill: DEFAULT_FILL_STYLE,
image: DEFAULT_IMAGE_STYLE,
text: DEFAULT_TEXT_STYLE,
stroke: DEFAULT_STROKE_STYLE,
zIndex: 0,
});
DEFAULT_STYLE_ARRAY = [DEFAULT_STYLE];
}
/**
* @type {HTMLTextAreaElement}
*/
let TEXTAREA;
/**
* A function that takes a url `{string}` and returns a url `{string}`.
* Might be used to change an icon path or to substitute a
* data url obtained from a KMZ array buffer.
*
* @typedef {function(string):string} IconUrlFunction
* @api
*/
/**
* Function that returns a url unchanged.
* @param {string} href Input url.
* @return {string} Output url.
*/
function defaultIconUrlFunction(href) {
return href;
}
/**
* @typedef {Object} Options
* @property {boolean} [extractStyles=true] Extract styles from the KML.
* @property {boolean} [showPointNames=true] Show names as labels for placemarks which contain points.
* @property {Array<Style>} [defaultStyle] Default style. The
* default default style is the same as Google Earth.
* @property {boolean} [writeStyles=true] Write styles into KML.
* @property {null|string} [crossOrigin='anonymous'] The `crossOrigin` attribute for loaded images. Note that you must provide a
* `crossOrigin` value if you want to access pixel data with the Canvas renderer.
* @property {IconUrlFunction} [iconUrlFunction] Function that takes a url string and returns a url string.
* Might be used to change an icon path or to substitute a data url obtained from a KMZ array buffer.
*/
/**
* @classdesc
* Feature format for reading and writing data in the KML format.
*
* {@link module:ol/format/KML~KML#readFeature} will read the first feature from
* a KML source.
*
* MultiGeometries are converted into GeometryCollections if they are a mix of
* geometry types, and into MultiPoint/MultiLineString/MultiPolygon if they are
* all of the same type.
*
* Note that the KML format uses the URL() constructor. Older browsers such as IE
* which do not support this will need a URL polyfill to be loaded before use.
*
* @api
*/
class KML extends XMLFeature {
/**
* @param {Options} [opt_options] Options.
*/
constructor(opt_options) {
super();
const options = opt_options ? opt_options : {};
if (!DEFAULT_STYLE_ARRAY) {
createStyleDefaults();
}
/**
* @type {import("../proj/Projection.js").default}
*/
this.dataProjection = getProjection('EPSG:4326');
/**
* @private
* @type {Array<Style>}
*/
this.defaultStyle_ = options.defaultStyle
? options.defaultStyle
: DEFAULT_STYLE_ARRAY;
/**
* @private
* @type {boolean}
*/
this.extractStyles_ =
options.extractStyles !== undefined ? options.extractStyles : true;
/**
* @type {boolean}
*/
this.writeStyles_ =
options.writeStyles !== undefined ? options.writeStyles : true;
/**
* @private
* @type {!Object<string, (Array<Style>|string)>}
*/
this.sharedStyles_ = {};
/**
* @private
* @type {boolean}
*/
this.showPointNames_ =
options.showPointNames !== undefined ? options.showPointNames : true;
/**
* @type {null|string}
*/
this.crossOrigin_ =
options.crossOrigin !== undefined ? options.crossOrigin : 'anonymous';
/**
* @type {IconUrlFunction}
*/
this.iconUrlFunction_ = options.iconUrlFunction
? options.iconUrlFunction
: defaultIconUrlFunction;
}
/**
* @param {Node} node Node.
* @param {Array<*>} objectStack Object stack.
* @private
* @return {Array<Feature>|undefined} Features.
*/
readDocumentOrFolder_(node, objectStack) {
// FIXME use scope somehow
const parsersNS = makeStructureNS(NAMESPACE_URIS, {
'Document': makeArrayExtender(this.readDocumentOrFolder_, this),
'Folder': makeArrayExtender(this.readDocumentOrFolder_, this),
'Placemark': makeArrayPusher(this.readPlacemark_, this),
'Style': this.readSharedStyle_.bind(this),
'StyleMap': this.readSharedStyleMap_.bind(this),
});
/** @type {Array<Feature>} */
// @ts-ignore
const features = pushParseAndPop([], parsersNS, node, objectStack, this);
if (features) {
return features;
} else {
return undefined;
}
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @private
* @return {Feature|undefined} Feature.
*/
readPlacemark_(node, objectStack) {
const object = pushParseAndPop(
{'geometry': null},
PLACEMARK_PARSERS,
node,
objectStack,
this
);
if (!object) {
return undefined;
}
const feature = new Feature();
const id = node.getAttribute('id');
if (id !== null) {
feature.setId(id);
}
const options = /** @type {import("./Feature.js").ReadOptions} */ (
objectStack[0]
);
const geometry = object['geometry'];
if (geometry) {
transformGeometryWithOptions(geometry, false, options);
}
feature.setGeometry(geometry);
delete object['geometry'];
if (this.extractStyles_) {
const style = object['Style'];
const styleUrl = object['styleUrl'];
const styleFunction = createFeatureStyleFunction(
style,
styleUrl,
this.defaultStyle_,
this.sharedStyles_,
this.showPointNames_
);
feature.setStyle(styleFunction);
}
delete object['Style'];
// we do not remove the styleUrl property from the object, so it
// gets stored on feature when setProperties is called
feature.setProperties(object, true);
return feature;
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @private
*/
readSharedStyle_(node, objectStack) {
const id = node.getAttribute('id');
if (id !== null) {
const style = readStyle.call(this, node, objectStack);
if (style) {
let styleUri;
let baseURI = node.baseURI;
if (!baseURI || baseURI == 'about:blank') {
baseURI = window.location.href;
}
if (baseURI) {
const url = new URL('#' + id, baseURI);
styleUri = url.href;
} else {
styleUri = '#' + id;
}
this.sharedStyles_[styleUri] = style;
}
}
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @private
*/
readSharedStyleMap_(node, objectStack) {
const id = node.getAttribute('id');
if (id === null) {
return;
}
const styleMapValue = readStyleMapValue.call(this, node, objectStack);
if (!styleMapValue) {
return;
}
let styleUri;
let baseURI = node.baseURI;
if (!baseURI || baseURI == 'about:blank') {
baseURI = window.location.href;
}
if (baseURI) {
const url = new URL('#' + id, baseURI);
styleUri = url.href;
} else {
styleUri = '#' + id;
}
this.sharedStyles_[styleUri] = styleMapValue;
}
/**
* @param {Element} node Node.
* @param {import("./Feature.js").ReadOptions} [opt_options] Options.
* @return {import("../Feature.js").default} Feature.
*/
readFeatureFromNode(node, opt_options) {
if (!includes(NAMESPACE_URIS, node.namespaceURI)) {
return null;
}
const feature = this.readPlacemark_(node, [
this.getReadOptions(node, opt_options),
]);
if (feature) {
return feature;
} else {
return null;
}
}
/**
* @protected
* @param {Element} node Node.
* @param {import("./Feature.js").ReadOptions} [opt_options] Options.
* @return {Array<import("../Feature.js").default>} Features.
*/
readFeaturesFromNode(node, opt_options) {
if (!includes(NAMESPACE_URIS, node.namespaceURI)) {
return [];
}
let features;
const localName = node.localName;
if (localName == 'Document' || localName == 'Folder') {
features = this.readDocumentOrFolder_(node, [
this.getReadOptions(node, opt_options),
]);
if (features) {
return features;
} else {
return [];
}
} else if (localName == 'Placemark') {
const feature = this.readPlacemark_(node, [
this.getReadOptions(node, opt_options),
]);
if (feature) {
return [feature];
} else {
return [];
}
} else if (localName == 'kml') {
features = [];
for (let n = node.firstElementChild; n; n = n.nextElementSibling) {
const fs = this.readFeaturesFromNode(n, opt_options);
if (fs) {
extend(features, fs);
}
}
return features;
} else {
return [];
}
}
/**
* Read the name of the KML.
*
* @param {Document|Element|string} source Source.
* @return {string|undefined} Name.
* @api
*/
readName(source) {
if (!source) {
return undefined;
} else if (typeof source === 'string') {
const doc = parse(source);
return this.readNameFromDocument(doc);
} else if (isDocument(source)) {
return this.readNameFromDocument(/** @type {Document} */ (source));
} else {
return this.readNameFromNode(/** @type {Element} */ (source));
}
}
/**
* @param {Document} doc Document.
* @return {string|undefined} Name.
*/
readNameFromDocument(doc) {
for (let n = /** @type {Node} */ (doc.firstChild); n; n = n.nextSibling) {
if (n.nodeType == Node.ELEMENT_NODE) {
const name = this.readNameFromNode(/** @type {Element} */ (n));
if (name) {
return name;
}
}
}
return undefined;
}
/**
* @param {Element} node Node.
* @return {string|undefined} Name.
*/
readNameFromNode(node) {
for (let n = node.firstElementChild; n; n = n.nextElementSibling) {
if (includes(NAMESPACE_URIS, n.namespaceURI) && n.localName == 'name') {
return readString(n);
}
}
for (let n = node.firstElementChild; n; n = n.nextElementSibling) {
const localName = n.localName;
if (
includes(NAMESPACE_URIS, n.namespaceURI) &&
(localName == 'Document' ||
localName == 'Folder' ||
localName == 'Placemark' ||
localName == 'kml')
) {
const name = this.readNameFromNode(n);
if (name) {
return name;
}
}
}
return undefined;
}
/**
* Read the network links of the KML.
*
* @param {Document|Element|string} source Source.
* @return {Array<Object>} Network links.
* @api
*/
readNetworkLinks(source) {
const networkLinks = [];
if (typeof source === 'string') {
const doc = parse(source);
extend(networkLinks, this.readNetworkLinksFromDocument(doc));
} else if (isDocument(source)) {
extend(
networkLinks,
this.readNetworkLinksFromDocument(/** @type {Document} */ (source))
);
} else {
extend(
networkLinks,
this.readNetworkLinksFromNode(/** @type {Element} */ (source))
);
}
return networkLinks;
}
/**
* @param {Document} doc Document.
* @return {Array<Object>} Network links.
*/
readNetworkLinksFromDocument(doc) {
const networkLinks = [];
for (let n = /** @type {Node} */ (doc.firstChild); n; n = n.nextSibling) {
if (n.nodeType == Node.ELEMENT_NODE) {
extend(
networkLinks,
this.readNetworkLinksFromNode(/** @type {Element} */ (n))
);
}
}
return networkLinks;
}
/**
* @param {Element} node Node.
* @return {Array<Object>} Network links.
*/
readNetworkLinksFromNode(node) {
const networkLinks = [];
for (let n = node.firstElementChild; n; n = n.nextElementSibling) {
if (
includes(NAMESPACE_URIS, n.namespaceURI) &&
n.localName == 'NetworkLink'
) {
const obj = pushParseAndPop({}, NETWORK_LINK_PARSERS, n, []);
networkLinks.push(obj);
}
}
for (let n = node.firstElementChild; n; n = n.nextElementSibling) {
const localName = n.localName;
if (
includes(NAMESPACE_URIS, n.namespaceURI) &&
(localName == 'Document' || localName == 'Folder' || localName == 'kml')
) {
extend(networkLinks, this.readNetworkLinksFromNode(n));
}
}
return networkLinks;
}
/**
* Read the regions of the KML.
*
* @param {Document|Element|string} source Source.
* @return {Array<Object>} Regions.
* @api
*/
readRegion(source) {
const regions = [];
if (typeof source === 'string') {
const doc = parse(source);
extend(regions, this.readRegionFromDocument(doc));
} else if (isDocument(source)) {
extend(
regions,
this.readRegionFromDocument(/** @type {Document} */ (source))
);
} else {
extend(regions, this.readRegionFromNode(/** @type {Element} */ (source)));
}
return regions;
}
/**
* @param {Document} doc Document.
* @return {Array<Object>} Region.
*/
readRegionFromDocument(doc) {
const regions = [];
for (let n = /** @type {Node} */ (doc.firstChild); n; n = n.nextSibling) {
if (n.nodeType == Node.ELEMENT_NODE) {
extend(regions, this.readRegionFromNode(/** @type {Element} */ (n)));
}
}
return regions;
}
/**
* @param {Element} node Node.
* @return {Array<Object>} Region.
* @api
*/
readRegionFromNode(node) {
const regions = [];
for (let n = node.firstElementChild; n; n = n.nextElementSibling) {
if (includes(NAMESPACE_URIS, n.namespaceURI) && n.localName == 'Region') {
const obj = pushParseAndPop({}, REGION_PARSERS, n, []);
regions.push(obj);
}
}
for (let n = node.firstElementChild; n; n = n.nextElementSibling) {
const localName = n.localName;
if (
includes(NAMESPACE_URIS, n.namespaceURI) &&
(localName == 'Document' || localName == 'Folder' || localName == 'kml')
) {
extend(regions, this.readRegionFromNode(n));
}
}
return regions;
}
/**
* Encode an array of features in the KML format as an XML node. GeometryCollections,
* MultiPoints, MultiLineStrings, and MultiPolygons are output as MultiGeometries.
*
* @param {Array<Feature>} features Features.
* @param {import("./Feature.js").WriteOptions} [opt_options] Options.
* @return {Node} Node.
* @api
*/
writeFeaturesNode(features, opt_options) {
opt_options = this.adaptOptions(opt_options);
const kml = createElementNS(NAMESPACE_URIS[4], 'kml');
const xmlnsUri = 'http://www.w3.org/2000/xmlns/';
kml.setAttributeNS(xmlnsUri, 'xmlns:gx', GX_NAMESPACE_URIS[0]);
kml.setAttributeNS(xmlnsUri, 'xmlns:xsi', XML_SCHEMA_INSTANCE_URI);
kml.setAttributeNS(
XML_SCHEMA_INSTANCE_URI,
'xsi:schemaLocation',
SCHEMA_LOCATION
);
const /** @type {import("../xml.js").NodeStackItem} */ context = {
node: kml,
};
/** @type {!Object<string, (Array<Feature>|Feature|undefined)>} */
const properties = {};
if (features.length > 1) {
properties['Document'] = features;
} else if (features.length == 1) {
properties['Placemark'] = features[0];
}
const orderedKeys = KML_SEQUENCE[kml.namespaceURI];
const values = makeSequence(properties, orderedKeys);
pushSerializeAndPop(
context,
KML_SERIALIZERS,
OBJECT_PROPERTY_NODE_FACTORY,
values,
[opt_options],
orderedKeys,
this
);
return kml;
}
}
/**
* @param {Style|undefined} foundStyle Style.
* @param {string} name Name.
* @return {Style} style Style.
*/
function createNameStyleFunction(foundStyle, name) {
const textOffset = [0, 0];
let textAlign = 'start';
const imageStyle = foundStyle.getImage();
if (imageStyle) {
let imageSize = imageStyle.getImageSize();
if (imageSize === null) {
imageSize = DEFAULT_IMAGE_STYLE_SIZE;
}
if (imageSize.length == 2) {
const imageScale = imageStyle.getScaleArray();
// Offset the label to be centered to the right of the icon,
// if there is one.
textOffset[0] = (imageScale[0] * imageSize[0]) / 2;
textOffset[1] = (-imageScale[1] * imageSize[1]) / 2;
textAlign = 'left';
}
}
let textStyle = foundStyle.getText();
if (textStyle) {
// clone the text style, customizing it with name, alignments and offset.
// Note that kml does not support many text options that OpenLayers does (rotation, textBaseline).
textStyle = textStyle.clone();
textStyle.setFont(textStyle.getFont() || DEFAULT_TEXT_STYLE.getFont());
textStyle.setScale(textStyle.getScale() || DEFAULT_TEXT_STYLE.getScale());
textStyle.setFill(textStyle.getFill() || DEFAULT_TEXT_STYLE.getFill());
textStyle.setStroke(textStyle.getStroke() || DEFAULT_TEXT_STROKE_STYLE);
} else {
textStyle = DEFAULT_TEXT_STYLE.clone();
}
textStyle.setText(name);
textStyle.setOffsetX(textOffset[0]);
textStyle.setOffsetY(textOffset[1]);
textStyle.setTextAlign(textAlign);
const nameStyle = new Style({
image: imageStyle,
text: textStyle,
});
return nameStyle;
}
/**
* @param {Array<Style>|undefined} style Style.
* @param {string} styleUrl Style URL.
* @param {Array<Style>} defaultStyle Default style.
* @param {!Object<string, (Array<Style>|string)>} sharedStyles Shared styles.
* @param {boolean|undefined} showPointNames true to show names for point placemarks.
* @return {import("../style/Style.js").StyleFunction} Feature style function.
*/
function createFeatureStyleFunction(
style,
styleUrl,
defaultStyle,
sharedStyles,
showPointNames
) {
return (
/**
* @param {Feature} feature feature.
* @param {number} resolution Resolution.
* @return {Array<Style>|Style} Style.
*/
function (feature, resolution) {