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Adds a second export button to export to KML.
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Brandon Carpenter
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Apr 19, 2021
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,244 @@ | ||
| /* | ||
| * BSD 3-Clause License | ||
| * | ||
| * Copyright (c) 2021, 8minute Solar Energy LLC | ||
| * All rights reserved. | ||
| * | ||
| * Redistribution and use in source and binary forms, with or without | ||
| * modification, are permitted provided that the following conditions are met: | ||
| * | ||
| * 1. Redistributions of source code must retain the above copyright notice, this | ||
| * list of conditions and the following disclaimer. | ||
| * | ||
| * 2. 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. | ||
| * | ||
| * 3. Neither the name of the copyright holder 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 HOLDER 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. | ||
| */ | ||
|
|
||
| /* jshint esversion: 6 */ | ||
|
|
||
| define([ | ||
| 'esri/SpatialReference', | ||
| 'esri/geometry/projection', | ||
| ], | ||
| function(SpatialReference, projection) { | ||
|
|
||
| class Node { | ||
| /* Class to simplify creation of XML documents. | ||
| * | ||
| * Eliminates repetitive code that makes it difficult to read. | ||
| * Methods and getters return Node objects to allow call chaining. | ||
| */ | ||
|
|
||
| constructor(elem) { | ||
| // elem should be an XML DOM Element object | ||
| this.elem = elem; | ||
| } | ||
|
|
||
| // Helpers to return the parent (enclosing) node | ||
| get parent() { return new Node(this.elem.parentNode); } | ||
| get end() { return new Node(this.elem.parentNode); } | ||
|
|
||
| using(func) { | ||
| // Call function with the current node | ||
| func(this); | ||
| return this; | ||
| } | ||
|
|
||
| forEach(items, func) { | ||
| // Call func(node, item) for each item in array it | ||
| items.forEach(function(item) { func(this, item); }, this); | ||
| return this; | ||
| } | ||
|
|
||
| add(name) { | ||
| // Append a new child element to the node | ||
| // | ||
| // name is the tag name to append. Namespace tags are supported using | ||
| // `ns:name`, but the namespace must already exist on the document. | ||
|
|
||
| let doc = this.elem.ownerDocument; | ||
| let index = name.indexOf(':'); | ||
| let xmlns = index == -1 ? doc.documentElement.namespaceURI : | ||
| doc.documentElement.getAttribute(`xmlns:${name.substring(0, 2)}`); | ||
| let elem = doc.createElementNS(xmlns, name); | ||
| this.elem.appendChild(elem); | ||
| return new Node(elem); | ||
| } | ||
|
|
||
| dropIfEmpty() { | ||
| // Drop the node if no child nodes were added | ||
| let parent = this.elem.parentNode; | ||
| if (this.elem.firstChild === null) { | ||
| parent.removeChild(this.elem); | ||
| } | ||
| return new Node(parent); | ||
| } | ||
|
|
||
| dropUnused() { | ||
| // Drop a container node if there are insufficient child nodes | ||
| let parent = this.elem.parentNode; | ||
| let children = this.elem.childNodes; | ||
| if (children.length < 2) { | ||
| for (let child of children) { | ||
| this.elem.removeChild(child); | ||
| parent.appendChild(child); | ||
| } | ||
| parent.removeChild(this.elem); | ||
| } | ||
| return new Node(parent); | ||
| } | ||
|
|
||
| text(text) { | ||
| // Add and return a text node | ||
| this.elem.appendChild(this.elem.ownerDocument.createTextNode(text)); | ||
| return this; | ||
| } | ||
|
|
||
| cdata(text) { | ||
| // Add and return a CDATA node | ||
| this.elem.appendChild(this.elem.ownerDocument.createCDATASection(text)); | ||
| return this; | ||
| } | ||
|
|
||
| attr(name, value) { | ||
| // Set an attribute on the node | ||
| this.elem.setAttribute(name, value); | ||
| return this; | ||
| } | ||
| } | ||
|
|
||
|
|
||
| function colorToHex(color) { | ||
| // Convert ArcGIS color to KML hex color | ||
| return [~~(color.a * 255), color.b, color.g, color.r].map(function(value) { | ||
| let s = value.toString(16); | ||
| return '0'.repeat(2 - s.length) + s; | ||
| }).join(''); | ||
| } | ||
|
|
||
|
|
||
| function symbolStyle(node, symbol) { | ||
| // Add style to node to match symbol as best as possible | ||
| switch (symbol.type) { | ||
| case 'simplelinesymbol': | ||
| node.add('LineStyle'). | ||
| add('color').text(colorToHex(symbol.color)).end. | ||
| add('width').text(symbol.width * 4 / 3); | ||
| break; | ||
|
|
||
| case 'simplefillsymbol': | ||
| node.add('PolyStyle'). | ||
| add('color').text(colorToHex(symbol.color)).end. | ||
| add('fill').text('1').end. | ||
| add('outline').text('1'); | ||
| symbolStyle(node, symbol.outline); | ||
| break; | ||
|
|
||
| case 'picturemarkersymbol': | ||
| node.add('IconStyle'). | ||
| add('Icon'). | ||
| add('href').text(symbol.imageData || symbol.url); | ||
| break; | ||
|
|
||
| case 'simplemarkersymbol': | ||
| node.add('IconStyle'). | ||
| add('color').text(colorToHex(symbol.color)); | ||
| break; | ||
|
|
||
| case 'textsymbol': | ||
| node.add('LabelStyle'). | ||
| add('color').text(colorToHex(symbol.color)); | ||
| break; | ||
|
|
||
| case 'picturefillsymbol': | ||
| default: | ||
| break; | ||
| } | ||
| } | ||
|
|
||
|
|
||
| return { | ||
| graphicsToKml: function(graphics) { | ||
| // Convert a list of graphics objects to an KML document and return XMLDocument object. | ||
| // | ||
| // Returns false if no graphics are given. | ||
|
|
||
| if (!graphics.length) | ||
| return null; | ||
|
|
||
| const wgs84 = SpatialReference({wkid: 4326}); | ||
|
|
||
| let doc = (new DOMParser()).parseFromString(`<?xml version="1.0" encoding="UTF-8"?> | ||
| <kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2"></kml>`, 'application/xml'); | ||
| let root = new Node(doc.documentElement); | ||
|
|
||
| root.add('Document'). | ||
| add('name').text('Drawings').end. | ||
| forEach(graphics, function(node, graphic) { | ||
| let geometry = graphic.geometry; | ||
| if (geometry.spatialReference.wkid != wgs84.wkid) { | ||
| Promise.resolve(projection.load()); | ||
| geometry = projection.project(geometry, wgs84); | ||
| } | ||
|
|
||
| node.add('Placemark'). | ||
| add('name').text(graphic.attributes.name).end. | ||
| add('description').cdata(graphic.attributes.description).end. | ||
| add('Style').using(function(node) { symbolStyle(node, graphic.symbol); }).dropIfEmpty(). | ||
| add('MultiGeometry'). | ||
| using(function(node) { | ||
| switch (geometry.type) { | ||
| case 'point': | ||
| node.add('Point'). | ||
| add('coordinates').text(`${geometry.x},${geometry.y},${geometry.hasZ ? geometry.z || 0 : 0}`); | ||
| break; | ||
|
|
||
| case 'polyline': | ||
| node.forEach(geometry.paths, function(node, path) { | ||
| node.add('LineString'). | ||
| add('extrude').text('0').end. | ||
| add('altitudeMode').text('clampToGround').end. | ||
| add('coordinates').text( | ||
| path.map(function([x, y, z=0]) { return `${x},${y},${geometry.hasZ ? z : 0}`; }).join(' ')); | ||
| }); | ||
| break; | ||
|
|
||
| case 'polygon': | ||
| node.forEach(geometry.rings, function(node, ring) { | ||
| node.add('Polygon'). | ||
| add('extrude').text('0').end. | ||
| add('altitudeMode').text('clampToGround').end. | ||
| add('outerBoundaryIs'). | ||
| add('LinearRing'). | ||
| add('coordinates').text( | ||
| ring.map(function([x, y, z=0]) { return `${x},${y},${geometry.hasZ ? z : 0}`; }).join(' ')); | ||
| }); | ||
| break; | ||
|
|
||
| default: | ||
| break; | ||
| } | ||
| }).dropUnused(); | ||
| }); | ||
|
|
||
| return doc; | ||
| }, | ||
|
|
||
| }; | ||
| }); |