Merge pull request #712 from bartvde/wkt
Add WKT parser (r=@ahocevar,@twpayne,@tschaub)
This commit is contained in:
Bart van den Eijnden
3
src/ol/parser/wkt.exports
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3
src/ol/parser/wkt.exports
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@@ -0,0 +1,3 @@
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@exportSymbol ol.parser.WKT
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@exportProperty ol.parser.WKT.prototype.read
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@exportProperty ol.parser.WKT.prototype.write
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345
src/ol/parser/wkt.js
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345
src/ol/parser/wkt.js
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@@ -0,0 +1,345 @@
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goog.provide('ol.parser.WKT');
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goog.require('goog.array');
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goog.require('goog.string');
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goog.require('ol.geom.Geometry');
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goog.require('ol.geom.GeometryCollection');
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goog.require('ol.geom.LineString');
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goog.require('ol.geom.MultiLineString');
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goog.require('ol.geom.MultiPoint');
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goog.require('ol.geom.MultiPolygon');
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goog.require('ol.geom.Point');
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goog.require('ol.geom.Polygon');
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goog.require('ol.parser.Parser');
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/**
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* @constructor
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* @extends {ol.parser.Parser}
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*/
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ol.parser.WKT = function() {
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};
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goog.inherits(ol.parser.WKT, ol.parser.Parser);
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/**
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* Constants for regExes.
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* @enum {RegExp}
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*/
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ol.parser.WKT.regExes = {
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typeStr: /^\s*(\w+)\s*\(\s*(.*)\s*\)\s*$/,
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spaces: /\s+/,
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parenComma: /\)\s*,\s*\(/,
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doubleParenComma: /\)\s*\)\s*,\s*\(\s*\(/,
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trimParens: /^\s*\(?(.*?)\)?\s*$/,
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geomCollection: /,\s*([A-Za-z])/g,
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removeNewLine: /[\n\r]/g
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};
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/**
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* @param {string} str WKT point.
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* @return {ol.geom.Point} Parsed point.
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* @private
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*/
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ol.parser.WKT.prototype.parsePoint_ = function(str) {
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var coords = goog.string.trim(str).split(ol.parser.WKT.regExes.spaces);
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return new ol.geom.Point(goog.array.map(coords, parseFloat));
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};
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/**
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* @param {string} str WKT linestring.
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* @return {ol.geom.LineString} Parsed linestring.
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* @private
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*/
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ol.parser.WKT.prototype.parseLineString_ = function(str) {
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var points = goog.string.trim(str).split(',');
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var coordinates = [];
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for (var i = 0, ii = points.length; i < ii; ++i) {
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coordinates.push(this.parsePoint_.apply(this,
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[points[i]]).getCoordinates());
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}
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return new ol.geom.LineString(coordinates);
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};
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/**
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* @param {string} str WKT multipoint.
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* @return {ol.geom.MultiPoint} Parsed multipoint.
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* @private
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*/
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ol.parser.WKT.prototype.parseMultiPoint_ = function(str) {
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var point;
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var points = goog.string.trim(str).split(',');
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var parts = [];
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for (var i = 0, ii = points.length; i < ii; ++i) {
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point = points[i].replace(ol.parser.WKT.regExes.trimParens, '$1');
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parts.push(this.parsePoint_.apply(this, [point]));
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}
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return ol.geom.MultiPoint.fromParts(parts);
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};
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/**
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* @param {string} str WKT multilinestring.
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* @return {ol.geom.MultiLineString} Parsed multilinestring.
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* @private
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*/
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ol.parser.WKT.prototype.parseMultiLineString_ = function(str) {
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var line;
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var lines = goog.string.trim(str).split(ol.parser.WKT.regExes.parenComma);
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var parts = [];
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for (var i = 0, ii = lines.length; i < ii; ++i) {
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line = lines[i].replace(ol.parser.WKT.regExes.trimParens, '$1');
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parts.push(this.parseLineString_.apply(this, [line]));
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}
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return ol.geom.MultiLineString.fromParts(parts);
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};
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/**
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* @param {string} str WKT polygon.
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* @return {ol.geom.Polygon} Parsed polygon.
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* @private
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*/
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ol.parser.WKT.prototype.parsePolygon_ = function(str) {
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var ring, linestring, linearring;
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var rings = goog.string.trim(str).split(ol.parser.WKT.regExes.parenComma);
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var coordinates = [];
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for (var i = 0, ii = rings.length; i < ii; ++i) {
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ring = rings[i].replace(ol.parser.WKT.regExes.trimParens, '$1');
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linestring = this.parseLineString_.apply(this, [ring]).getCoordinates();
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coordinates.push(linestring);
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}
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return new ol.geom.Polygon(coordinates);
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};
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/**
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* @param {string} str WKT multipolygon.
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* @return {ol.geom.MultiPolygon} Parsed multipolygon.
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* @private
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*/
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ol.parser.WKT.prototype.parseMultiPolygon_ = function(str) {
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var polygon;
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var polygons = goog.string.trim(str).split(
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ol.parser.WKT.regExes.doubleParenComma);
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var parts = [];
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for (var i = 0, ii = polygons.length; i < ii; ++i) {
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polygon = polygons[i].replace(ol.parser.WKT.regExes.trimParens, '$1');
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parts.push(this.parsePolygon_.apply(this, [polygon]));
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}
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return ol.geom.MultiPolygon.fromParts(parts);
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};
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/**
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* @param {string} str WKT geometrycollection.
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* @return {ol.geom.GeometryCollection} Parsed geometrycollection.
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* @private
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*/
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ol.parser.WKT.prototype.parseGeometryCollection_ = function(str) {
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// separate components of the collection with |
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str = str.replace(ol.parser.WKT.regExes.geomCollection, '|$1');
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var wktArray = goog.string.trim(str).split('|');
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var components = [];
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for (var i = 0, ii = wktArray.length; i < ii; ++i) {
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components.push(this.parse_.apply(this, [wktArray[i]]));
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}
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return new ol.geom.GeometryCollection(components);
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};
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/**
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* @param {ol.geom.Point} geom Point geometry.
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* @return {string} Coordinates part of Point as WKT.
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* @private
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*/
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ol.parser.WKT.prototype.encodePoint_ = function(geom) {
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var coordinates = geom.getCoordinates();
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return coordinates[0] + ' ' + coordinates[1];
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};
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/**
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* @param {ol.geom.MultiPoint} geom MultiPoint geometry.
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* @return {string} Coordinates part of MultiPoint as WKT.
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* @private
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*/
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ol.parser.WKT.prototype.encodeMultiPoint_ = function(geom) {
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var array = [];
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for (var i = 0, ii = geom.components.length; i < ii; ++i) {
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array.push('(' + this.encodePoint_.apply(this, [geom.components[i]]) + ')');
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}
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return array.join(',');
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};
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/**
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* @param {ol.geom.GeometryCollection} geom GeometryCollection geometry.
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* @return {string} Coordinates part of GeometryCollection as WKT.
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* @private
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*/
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ol.parser.WKT.prototype.encodeGeometryCollection_ = function(geom) {
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var array = [];
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for (var i = 0, ii = geom.components.length; i < ii; ++i) {
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array.push(this.encode_.apply(this, [geom.components[i]]));
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}
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return array.join(',');
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};
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/**
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* @param {ol.geom.LineString} geom LineString geometry.
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* @return {string} Coordinates part of LineString as WKT.
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* @private
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*/
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ol.parser.WKT.prototype.encodeLineString_ = function(geom) {
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var coordinates = geom.getCoordinates();
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var array = [];
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for (var i = 0, ii = coordinates.length; i < ii; ++i) {
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array.push(coordinates[i][0] + ' ' + coordinates[i][1]);
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}
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return array.join(',');
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};
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/**
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* @param {ol.geom.MultiLineString} geom MultiLineString geometry.
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* @return {string} Coordinates part of MultiLineString as WKT.
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* @private
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*/
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ol.parser.WKT.prototype.encodeMultiLineString_ = function(geom) {
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var array = [];
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for (var i = 0, ii = geom.components.length; i < ii; ++i) {
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array.push('(' + this.encodeLineString_.apply(this,
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[geom.components[i]]) + ')');
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}
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return array.join(',');
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};
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/**
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* @param {ol.geom.Polygon} geom Polygon geometry.
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* @return {string} Coordinates part of Polygon as WKT.
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* @private
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*/
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ol.parser.WKT.prototype.encodePolygon_ = function(geom) {
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var array = [];
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for (var i = 0, ii = geom.rings.length; i < ii; ++i) {
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array.push('(' + this.encodeLineString_.apply(this,
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[geom.rings[i]]) + ')');
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}
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return array.join(',');
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};
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/**
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* @param {ol.geom.MultiPolygon} geom MultiPolygon geometry.
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* @return {string} Coordinates part of MultiPolygon as WKT.
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* @private
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*/
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ol.parser.WKT.prototype.encodeMultiPolygon_ = function(geom) {
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var array = [];
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for (var i = 0, ii = geom.components.length; i < ii; ++i) {
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array.push('(' + this.encodePolygon_.apply(this,
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[geom.components[i]]) + ')');
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}
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return array.join(',');
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};
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/**
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* Parse a WKT string.
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* @param {string} wkt WKT string.
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* @return {ol.geom.Geometry|ol.geom.GeometryCollection|undefined}
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* The geometry created.
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* @private
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*/
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ol.parser.WKT.prototype.parse_ = function(wkt) {
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wkt = wkt.replace(ol.parser.WKT.regExes.removeNewLine, ' ');
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var matches = ol.parser.WKT.regExes.typeStr.exec(wkt);
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var geometry;
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if (matches) {
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var type = matches[1].toLowerCase();
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var str = matches[2];
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switch (type) {
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case 'point':
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geometry = this.parsePoint_(str);
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break;
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case 'multipoint':
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geometry = this.parseMultiPoint_(str);
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break;
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case 'linestring':
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geometry = this.parseLineString_(str);
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break;
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case 'multilinestring':
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geometry = this.parseMultiLineString_(str);
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break;
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case 'polygon':
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geometry = this.parsePolygon_(str);
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break;
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case 'multipolygon':
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geometry = this.parseMultiPolygon_(str);
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break;
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case 'geometrycollection':
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geometry = this.parseGeometryCollection_(str);
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break;
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default:
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throw new Error('Bad geometry type: ' + type);
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}
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}
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return geometry;
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};
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/**
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* Encode a geometry as WKT.
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* @param {ol.geom.Geometry} geom The geometry to encode.
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* @return {string} WKT string for the geometry.
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* @private
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*/
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ol.parser.WKT.prototype.encode_ = function(geom) {
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var type = geom.getType();
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var result = type.toUpperCase() + '(';
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if (geom instanceof ol.geom.Point) {
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result += this.encodePoint_(geom);
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} else if (geom instanceof ol.geom.MultiPoint) {
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result += this.encodeMultiPoint_(geom);
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} else if (geom instanceof ol.geom.LineString) {
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result += this.encodeLineString_(geom);
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} else if (geom instanceof ol.geom.MultiLineString) {
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result += this.encodeMultiLineString_(geom);
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} else if (geom instanceof ol.geom.Polygon) {
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result += this.encodePolygon_(geom);
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} else if (geom instanceof ol.geom.MultiPolygon) {
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result += this.encodeMultiPolygon_(geom);
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} else if (geom instanceof ol.geom.GeometryCollection) {
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result += this.encodeGeometryCollection_(geom);
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} else {
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throw new Error('Bad geometry type: ' + type);
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}
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return result + ')';
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};
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/**
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* Parse a WKT string.
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* @param {string} str WKT string.
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* @return {ol.geom.Geometry|undefined} Parsed geometry.
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*/
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ol.parser.WKT.prototype.read = function(str) {
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return this.parse_(str);
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};
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/**
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* Write out a geometry as a WKT string.
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* @param {ol.geom.Geometry} geom The geometry to encode.
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* @return {string} WKT for the geometry.
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*/
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ol.parser.WKT.prototype.write = function(geom) {
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return this.encode_(geom);
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};
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166
test/spec/ol/parser/wkt.test.js
Normal file
166
test/spec/ol/parser/wkt.test.js
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@@ -0,0 +1,166 @@
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goog.provide('ol.test.parser.WKT');
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describe('ol.parser.WKT', function() {
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var parser = new ol.parser.WKT();
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it('Point read / written correctly', function() {
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var wkt = 'POINT(30 10)';
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var geom = parser.read(wkt);
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expect(geom.getCoordinates()).to.eql([30, 10]);
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expect(parser.write(geom)).to.eql(wkt);
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// test whitespace when reading
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wkt = 'POINT (30 10)';
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geom = parser.read(wkt);
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expect(geom.getCoordinates()).to.eql([30, 10]);
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});
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it('MultiPoint read / written correctly', function() {
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// there are two forms to test
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var wkt = 'MULTIPOINT((10 40),(40 30),(20 20),(30 10))';
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var geom = parser.read(wkt);
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expect(geom.components.length).to.eql(4);
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expect(geom.components[0].getCoordinates()).to.eql([10, 40]);
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expect(geom.components[1].getCoordinates()).to.eql([40, 30]);
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expect(geom.components[2].getCoordinates()).to.eql([20, 20]);
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expect(geom.components[3].getCoordinates()).to.eql([30, 10]);
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expect(parser.write(geom)).to.eql(wkt);
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// this has whitespace
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wkt = 'MULTIPOINT (10 40, 40 30, 20 20, 30 10)';
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geom = parser.read(wkt);
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expect(geom.components.length).to.eql(4);
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expect(geom.components[0].getCoordinates()).to.eql([10, 40]);
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expect(geom.components[1].getCoordinates()).to.eql([40, 30]);
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expect(geom.components[2].getCoordinates()).to.eql([20, 20]);
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expect(geom.components[3].getCoordinates()).to.eql([30, 10]);
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});
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it('LineString read / written correctly', function() {
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var wkt = 'LINESTRING(30 10,10 30,40 40)';
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var geom = parser.read(wkt);
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expect(geom.getType()).to.eql(ol.geom.GeometryType.LINESTRING);
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expect(geom.getCoordinates()).to.eql([[30, 10], [10, 30], [40, 40]]);
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expect(parser.write(geom)).to.eql(wkt);
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// test whitespace when reading
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wkt = 'LINESTRING (30 10, 10 30, 40 40)';
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geom = parser.read(wkt);
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expect(geom.getType()).to.eql(ol.geom.GeometryType.LINESTRING);
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expect(geom.getCoordinates()).to.eql([[30, 10], [10, 30], [40, 40]]);
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});
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it('MultiLineString read / written correctly', function() {
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var wkt = 'MULTILINESTRING((10 10,20 20,10 40),' +
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'(40 40,30 30,40 20,30 10))';
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var geom = parser.read(wkt);
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expect(geom.getType()).to.eql(ol.geom.GeometryType.MULTILINESTRING);
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expect(geom.components.length).to.eql(2);
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expect(geom.components[0].getType()).to.eql(
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ol.geom.GeometryType.LINESTRING);
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expect(geom.components[0].getCoordinates()).to.eql(
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[[10, 10], [20, 20], [10, 40]]);
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expect(parser.write(geom)).to.eql(wkt);
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// test whitespace when reading
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wkt = 'MULTILINESTRING ( (10 10, 20 20, 10 40), ' +
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'(40 40, 30 30, 40 20, 30 10) )';
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geom = parser.read(wkt);
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expect(geom.getType()).to.eql(ol.geom.GeometryType.MULTILINESTRING);
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expect(geom.components.length).to.eql(2);
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expect(geom.components[0].getType()).to.eql(
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ol.geom.GeometryType.LINESTRING);
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expect(geom.components[0].getCoordinates()).to.eql(
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[[10, 10], [20, 20], [10, 40]]);
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});
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it('Polygon read / written correctly', function() {
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var wkt = 'POLYGON((30 10,10 20,20 40,40 40,30 10))';
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var geom = parser.read(wkt);
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expect(geom.getType()).to.eql(ol.geom.GeometryType.POLYGON);
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expect(geom.rings.length).to.eql(1);
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expect(geom.rings[0].getType()).to.eql(ol.geom.GeometryType.LINEARRING);
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expect(geom.rings[0].getCoordinates()).to.eql(
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[[30, 10], [10, 20], [20, 40], [40, 40], [30, 10]]);
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expect(parser.write(geom)).to.eql(wkt);
|
||||
wkt = 'POLYGON((35 10,10 20,15 40,45 45,35 10),(20 30,35 35,30 20,20 30))';
|
||||
geom = parser.read(wkt);
|
||||
expect(geom.getType()).to.eql(ol.geom.GeometryType.POLYGON);
|
||||
expect(geom.rings.length).to.eql(2);
|
||||
expect(geom.rings[0].getType()).to.eql(ol.geom.GeometryType.LINEARRING);
|
||||
expect(geom.rings[1].getType()).to.eql(ol.geom.GeometryType.LINEARRING);
|
||||
expect(geom.rings[0].getCoordinates()).to.eql(
|
||||
[[35, 10], [10, 20], [15, 40], [45, 45], [35, 10]]);
|
||||
expect(geom.rings[1].getCoordinates()).to.eql(
|
||||
[[20, 30], [35, 35], [30, 20], [20, 30]]);
|
||||
expect(parser.write(geom)).to.eql(wkt);
|
||||
// test whitespace when reading
|
||||
wkt = 'POLYGON ( (30 10, 10 20, 20 40, 40 40, 30 10) )';
|
||||
geom = parser.read(wkt);
|
||||
expect(geom.getType()).to.eql(ol.geom.GeometryType.POLYGON);
|
||||
expect(geom.rings.length).to.eql(1);
|
||||
expect(geom.rings[0].getType()).to.eql(ol.geom.GeometryType.LINEARRING);
|
||||
expect(geom.rings[0].getCoordinates()).to.eql(
|
||||
[[30, 10], [10, 20], [20, 40], [40, 40], [30, 10]]);
|
||||
});
|
||||
|
||||
it('MultiPolygon read / written correctly', function() {
|
||||
var wkt = 'MULTIPOLYGON(((40 40,20 45,45 30,40 40)),' +
|
||||
'((20 35,45 20,30 5,10 10,10 30,20 35),(30 20,20 25,20 15,30 20)))';
|
||||
var geom = parser.read(wkt);
|
||||
expect(geom.getType()).to.eql(ol.geom.GeometryType.MULTIPOLYGON);
|
||||
expect(geom.components.length).to.eql(2);
|
||||
expect(geom.components[0].getType()).to.eql(ol.geom.GeometryType.POLYGON);
|
||||
expect(geom.components[1].getType()).to.eql(ol.geom.GeometryType.POLYGON);
|
||||
expect(geom.components[0].rings.length).to.eql(1);
|
||||
expect(geom.components[1].rings.length).to.eql(2);
|
||||
expect(geom.components[0].rings[0].getCoordinates()).to.eql(
|
||||
[[40, 40], [20, 45], [45, 30], [40, 40]]);
|
||||
expect(geom.components[1].rings[0].getCoordinates()).to.eql(
|
||||
[[20, 35], [45, 20], [30, 5], [10, 10], [10, 30], [20, 35]]);
|
||||
expect(geom.components[1].rings[1].getCoordinates()).to.eql(
|
||||
[[30, 20], [20, 25], [20, 15], [30, 20]]);
|
||||
expect(parser.write(geom)).to.eql(wkt);
|
||||
// test whitespace when reading
|
||||
wkt = 'MULTIPOLYGON( ( (40 40, 20 45, 45 30, 40 40) ), ' +
|
||||
'( (20 35, 45 20, 30 5, 10 10, 10 30, 20 35 ), ( 30 20, 20 25, ' +
|
||||
'20 15, 30 20 ) ) )';
|
||||
geom = parser.read(wkt);
|
||||
expect(geom.getType()).to.eql(ol.geom.GeometryType.MULTIPOLYGON);
|
||||
expect(geom.components.length).to.eql(2);
|
||||
expect(geom.components[0].getType()).to.eql(ol.geom.GeometryType.POLYGON);
|
||||
expect(geom.components[1].getType()).to.eql(ol.geom.GeometryType.POLYGON);
|
||||
expect(geom.components[0].rings.length).to.eql(1);
|
||||
expect(geom.components[1].rings.length).to.eql(2);
|
||||
expect(geom.components[0].rings[0].getCoordinates()).to.eql(
|
||||
[[40, 40], [20, 45], [45, 30], [40, 40]]);
|
||||
expect(geom.components[1].rings[0].getCoordinates()).to.eql(
|
||||
[[20, 35], [45, 20], [30, 5], [10, 10], [10, 30], [20, 35]]);
|
||||
expect(geom.components[1].rings[1].getCoordinates()).to.eql(
|
||||
[[30, 20], [20, 25], [20, 15], [30, 20]]);
|
||||
});
|
||||
|
||||
it('GeometryCollection read / written correctly', function() {
|
||||
var wkt = 'GEOMETRYCOLLECTION(POINT(4 6),LINESTRING(4 6,7 10))';
|
||||
var geom = parser.read(wkt);
|
||||
expect(geom.components.length).to.eql(2);
|
||||
expect(geom.getType()).to.eql(ol.geom.GeometryType.GEOMETRYCOLLECTION);
|
||||
expect(geom.components[0].getType()).to.eql(ol.geom.GeometryType.POINT);
|
||||
expect(geom.components[1].getType()).to.eql(
|
||||
ol.geom.GeometryType.LINESTRING);
|
||||
expect(geom.components[0].getCoordinates()).to.eql([4, 6]);
|
||||
expect(geom.components[1].getCoordinates()).to.eql([[4, 6], [7, 10]]);
|
||||
expect(parser.write(geom)).to.eql(wkt);
|
||||
// test whitespace when reading
|
||||
wkt = 'GEOMETRYCOLLECTION ( POINT (4 6), LINESTRING (4 6, 7 10) )';
|
||||
geom = parser.read(wkt);
|
||||
expect(geom.components.length).to.eql(2);
|
||||
expect(geom.getType()).to.eql(ol.geom.GeometryType.GEOMETRYCOLLECTION);
|
||||
expect(geom.components[0].getType()).to.eql(ol.geom.GeometryType.POINT);
|
||||
expect(geom.components[1].getType()).to.eql(
|
||||
ol.geom.GeometryType.LINESTRING);
|
||||
expect(geom.components[0].getCoordinates()).to.eql([4, 6]);
|
||||
expect(geom.components[1].getCoordinates()).to.eql([[4, 6], [7, 10]]);
|
||||
});
|
||||
|
||||
});
|
||||
|
||||
goog.require('ol.geom.GeometryType');
|
||||
goog.require('ol.parser.WKT');
|
||||
Reference in New Issue
Block a user