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Commit 395b5bb3 authored by BrittainJackson7's avatar BrittainJackson7
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move SLD styler to a node module

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package.json
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View file @ 395b5bb3
......@@ -90,6 +90,7 @@
"jquery": "^3.6.0",
"leaflet": "^1.7.1",
"leaflet-draw": "^1.0.4",
"leaflet.sld": "github:brittainjackson7/leaflet.sld#master",
"mocha-jsdom": "^2.0.0",
"proj4leaflet": "^1.0.2",
"react": "^17.0.2",
......
src/index.jsx
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View file @ 395b5bb3
......@@ -3,6 +3,6 @@ import ReactDOM from "react-dom";
import App from "./components/container/App.jsx";
import "./styles.css";
import "leaflet";
import "./leaflet.sld.js";
import "leaflet.sld";
ReactDOM.render(<App />, document.getElementById("map"));
src/leaflet.sld.js deleted 100644 → 0
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− 550
View file @ fb875489
(function() {
class Point{
constructor(x_coord, y_coord){
this.x = x_coord;
this.y = y_coord;
}
}
class LineSegment{
constructor(point_1, point_2){
this.start_point = point_1;
this.end_point = point_2;
this.segment_distance = this.get_segment_distance(this.start_point, this.end_point);
}
get_line_mid_point(){
let mid_point = new Point;
mid_point.x = (this.start_point.x + this.end_point.x) / 2;
mid_point.y = (this.start_point.y + this.end_point.y) / 2;
return mid_point
}
get_segment_distance(){
return Math.sqrt( Math.pow(this.end_point.x - this.start_point.x, 2) + Math.pow(this.end_point.y - this.start_point.y, 2) );
}
}
// default Path style applied if nothing matches
var defaultStyle = {
stroke: true,
color: "#000",
weight: 1,
opacity: 1,
fillOpacity: 1,
fillColor: '#03f',
strokeOpacity: 1,
strokeWidth: 1,
strokeDashstyle: "solid",
size: 3,
dashArray: null,
lineJoin: null,
lineCap: null,
};
// attributes converted to numeric values
var numericAttributes = ['weight', 'opacity', 'fillOpacity', 'strokeOpacity', 'size', 'rotation'];
// mapping between SLD attribute names and SVG names
var attributeNameMapping = {
'stroke': 'color',
'stroke-width': 'weight',
'stroke-opacity': 'opacity',
'fill-opacity': 'fillOpacity',
'fill': 'fillColor',
'stroke-opacity': 'strokeOpacity',
'stroke-dasharray': 'dashArray',
//strokeDashstyle,
'stroke-linejoin': 'lineJoin',
'stroke-linecap': 'lineCap',
// a bit special for pointsymboler, marker
'size': 'size',
'rotation': 'rotation',
'wellknownname': 'wellKnownName'
};
// mapping SLD operators to shortforms
var comparisionOperatorMapping = {
'ogc:PropertyIsEqualTo': '==',
'ogc:PropertyIsNotEqualTo': '!=',
'ogc:PropertyIsLessThan': '<',
'ogc:PropertyIsGreaterThan': '>',
'ogc:PropertyIsLessThanOrEqualTo': '<=',
'ogc:PropertyIsGreaterThanOrEqualTo': '>=',
//'ogc:PropertyIsNull': 'isNull',
//'ogc:PropertyIsBetween'
// ogc:PropertyIsLike
};
// namespaces for Tag lookup in XML
var namespaceMapping = {
se: 'http://www.opengis.net/se',
ogc: 'http://www.opengis.net/ogc',
sld: 'http://www.opengis.net/sld'
};
function getTagNameArray(element, tagName, childrens) {
var tagParts = tagName.split(':');
var ns = null;
var tags;
if (tagParts.length == 2) {
ns = tagParts[0];
tagName = tagParts[1];
}
if(typeof(childrens) !== 'undefined' && childrens) {
tags = [].filter.call(
element.children,
function(element) {
return element.tagName === ns + ':' + tagName
}
)
} else
tags = [].slice.call(element.getElementsByTagNameNS(
namespaceMapping[ns],
tagName
));
if(!tags.length && ns === 'se')
return getTagNameArray(element, 'sld:' + tagName, childrens);
else
return tags;
};
/**
* SLD Styler. Reads SLD 1.1.0.
*
*/
L.SLDStyler = L.Class.extend({
options: {
unmatchedStyle: {
color: false,
fill: false
}
},
initialize: function(sldStringOrXml, options) {
this.symbols = [];
L.Util.setOptions(this, options);
if (sldStringOrXml !== undefined) {
this.featureTypeStylesNameMap = {};
this.featureTypeStyles = this.parse(sldStringOrXml);
}
},
// translates PolygonSymbolizer attributes into Path attributes
parseSymbolizer: function(symbolizer) {
// SvgParameter names below se:Fill and se:Stroke
// are unique so don't bother parsing them seperatly.
var parameters = getTagNameArray(symbolizer, 'se:SvgParameter');
var cssParams = L.extend({}, defaultStyle);
if(!parameters.length) {
parameters = getTagNameArray(symbolizer, 'se:CssParameter');
}
parameters.forEach(function(param) {
var key = param.getAttribute('name');
var mappedKey = attributeNameMapping[key];
if (false == (mappedKey in cssParams)) {
console.error("Ignorning unknown SvgParameter name", key);
} else {
var value = param.textContent;
if (numericAttributes.indexOf(mappedKey) > -1) {
value = parseFloat(value, 10);
} else if (mappedKey === 'dashArray') {
value = value.split(' ').join(', ');
}
cssParams[mappedKey] = value;
}
});
// invididual tags fro pointsymbolizer which is a bit special
['Size', 'WellKnownName', 'Rotation'].forEach(tagName => {
const tags = getTagNameArray(symbolizer, 'se:' + tagName);
if (tags.length) {
const cssName = tagName.toLowerCase();
const mappedKey = attributeNameMapping[cssName];
let value = tags[0].textContent;
if (numericAttributes.indexOf(cssName) > -1) {
value = parseFloat(value, 10);
}
cssParams[mappedKey] = value;
}
})
const sizeTags = getTagNameArray(symbolizer, 'se:Size');
if (sizeTags.length) {
}
const wellKnownNameTags = getTagNameArray(symbolizer, 'se:WellKnownName');
if (wellKnownNameTags.length) {
cssParams[attributeNameMapping['wellknown']]
}
return cssParams;
},
parseFilter: function(filter) {
if(filter) {
var hasAnd = getTagNameArray(filter, 'ogc:And').length;
var hasOr = getTagNameArray(filter, 'ogc:Or').length;
var filterJson = {
operator: hasAnd == true ? 'and' : hasOr ? 'or' : null,
comparisions: []
};
Object.keys(comparisionOperatorMapping).forEach(function(key) {
var comparisionElements = getTagNameArray(filter, key);
var comparisionOperator = comparisionOperatorMapping[key];
comparisionElements.forEach(function(comparisionElement) {
var property = getTagNameArray(comparisionElement, 'ogc:PropertyName')[0].textContent;
var literal = getTagNameArray(comparisionElement, 'ogc:Literal')[0].textContent;
filterJson.comparisions.push({
operator: comparisionOperator,
property: property,
literal: literal
})
})
});
return filterJson;
}
},
parseRule: function(rule) {
var filter = getTagNameArray(rule, 'ogc:Filter')[0];
var polygonSymbolizer = getTagNameArray(rule, 'se:PolygonSymbolizer')[0];
var lineSymbolizer = getTagNameArray(rule, 'se:LineSymbolizer')[0];
var pointSymbolizer = getTagNameArray(rule, 'se:PointSymbolizer')[0];
return {
filter: this.parseFilter(filter),
polygonSymbolizer: polygonSymbolizer ? this.parseSymbolizer(polygonSymbolizer) : null,
lineSymbolizer: lineSymbolizer ? this.parseSymbolizer(lineSymbolizer) : null,
pointSymbolizer: pointSymbolizer ? this.parseSymbolizer(pointSymbolizer) : null
}
},
parse: function(sldStringOrXml) {
var xmlDoc = sldStringOrXml;
var self = this;
if (typeof(sldStringOrXml) === 'string') {
var parser = new DOMParser();
xmlDoc = parser.parseFromString(sldStringOrXml, "text/xml");
}
var featureTypeStyles = getTagNameArray(xmlDoc, 'se:FeatureTypeStyle');
window.xmlDoc = xmlDoc;
featureTypeStyles.forEach(function(element, idx) {
var layerName = getTagNameArray(
element.parentElement.parentElement,
'se:Name',
true
).map(function (node) {
return node.innerHTML;
});
if(layerName.length) {
self.featureTypeStylesNameMap[layerName] = idx;
}
});
return featureTypeStyles.map(function(featureTypeStyle) {
var rules = getTagNameArray(featureTypeStyle, 'se:Rule');
var name = getTagNameArray(
featureTypeStyle.parentElement,
'se:Name',
true
).map(function(node) {
return node.innerHTML;
});
if(!name.length)
name = null;
else
name = name[0];
return {
'name' : name,
'rules': rules.map(function(rule) {
return this.parseRule(rule);
}, this)
};
}, this);
},
isFilterMatch: function(filter, properties) {
if (filter) {
var operator = filter.operator == null || filter.operator == 'and' ? 'every' : 'some';
if(filter.comparisions.length <= 0){
return false;
}
return filter.comparisions[operator](function(comp) {
var property = properties[comp.property.toLowerCase()];
if (comp.operator == '==') {
return property == comp.literal;
} else if (comp.operator == '!=') {
return property != comp.literal;
} else if (comp.operator == '<') {
return property < comp.literal;
} else if (comp.operator == '>') {
return property > comp.literal;
} else if (comp.operator == '<=') {
return property <= comp.literal;
} else if (comp.operator == '>=') {
return property >= comp.literal;
} else {
console.error('Unknown comparision operator', comp.operator);
}
});
} else{
return true;
}
},
matchFn: function (featureTypeStyle, feature) {
var matchingRule = null;
featureTypeStyle.rules.some(function (rule) {
if (this.isFilterMatch(rule.filter, feature.properties)) {
matchingRule = rule;
return true;
}
}, this);
return matchingRule;
},
styleFn: function (indexOrName, feature) {
var matchingRule = null;
if (typeof (indexOrName) !== 'undefined') {
if (
typeof (indexOrName) === "string" &&
indexOrName in this.featureTypeStylesNameMap
) {
indexOrName = this.featureTypeStylesNameMap[indexOrName];
} else {
console.error("Unknown layer style '" + indexOrName + "'.")
return {};
}
if(indexOrName in this.featureTypeStyles) {
matchingRule = this.matchFn(
this.featureTypeStyles[indexOrName],
feature
)
} else {
console.error("Unkonwn style index " + indexOrName)
return {}
}
} else
this.featureTypeStyles.some(function (featureTypeStyle) {
matchingRule = this.matchFn(featureTypeStyle, feature)
}, this);
if (matchingRule != null) {
switch (feature.geometry.type) {
case 'LineString':
case 'MultiLineString':
return matchingRule.lineSymbolizer;
case 'Polygon':
case 'MultiPolygon':
return matchingRule.polygonSymbolizer;
case 'Point':
return matchingRule.pointSymbolizer;
}
return this.options.unmatchedStyle;
}
return {};
},
pointToLayerFunction: function(indexOrName, feature, latlng) {
var styling = this.styleFn(indexOrName, feature);
return L.circleMarker(latlng, {
radius: styling.size || 1,
interactive: false
});
},
getStyleFunction: function (indexOrName) {
return this.styleFn.bind(this, indexOrName);
},
getPointToLayerFunction: function(indexOrName) {
return this.pointToLayerFunction.bind(this, indexOrName);
},
find_symbol: function( svgRequest ) {
// Declare variable to hold svg contents
var svgText;
// Dynamically load modules of svgs in plaintext
const svgFiles = require.context(
'!url-loader?encoding=ascii!./images/FGDC_svgs/', true, /\.svg$/
);
// Loop through loaded files
svgFiles.keys().forEach( (svgKey) => {
// Check if key matches requested svg name
if( svgKey.split("/").pop() == svgRequest )
{
// Assign value of svg module
svgText = svgFiles(svgKey);
}
})
// Return contents of svg
return svgText.default;
},
symbolize_with_icons: function(geolayer, map){
let layer = null;
let symbol = null;
for (var i in geolayer._layers){
layer = geolayer._layers[i]
if(layer.feature.geometry.type != null){
// symbol = find_symbol();
if (layer.feature.geometry.type == "LineString"){
this.symbolize_line(layer.feature.geometry, map, symbol);
} else if ((layer.feature.geometry.type == "Polygon")){
this.symbolize_polygon(layer.feature.geometry, map, symbol);
}}
}
},
symbolize_line: function(geometry, map, symbol){
let total_line_length = 0;
let point_arr = [];
let mid_point_distance = 0;
let line_segment = null;
let distance_from_endpoint_to_midpoint = 0;
let g = 0;
let mid_point = null;
point_arr = this.create_arr_of_line_segments(geometry);
total_line_length = this.get_total_line_length(point_arr);
mid_point_distance = total_line_length / 2;
line_segment = this.find_line_segment(mid_point_distance, point_arr);
distance_from_endpoint_to_midpoint = this.get_distance_from_line_endpoint_to_midpoint(line_segment, mid_point_distance, point_arr);
g = line_segment.get_segment_distance() - distance_from_endpoint_to_midpoint;
mid_point = this.get_mid_point( line_segment.start_point, line_segment.end_point,
g, line_segment.get_segment_distance());
this.add_symbol(mid_point, map, symbol);
},
symbolize_polygon: function(geometry, map){
let point_1 = null;
let point_2 = null;
let line_segment = null;
let mid_point = null;
// for each coordinate
for (let i = 0; i < geometry.coordinates[0].length - 1; i++){
point_1 = new Point(geometry.coordinates[0][i][0], geometry.coordinates[0][i][1])
point_2 = new Point(geometry.coordinates[0][i + 1][0], geometry.coordinates[0][i + 1][1])
line_segment = new LineSegment(point_1, point_2);
mid_point = line_segment.get_line_mid_point();
this.add_symbol(mid_point, map);
}
},
create_arr_of_line_segments: function(geometry){
let line_segment = null;
let point_arr = [];
let amount_of_vectors = geometry.coordinates.length - 1;
for (let i = 0; i < amount_of_vectors; i++){
current_point = geometry.coordinates[i];
next_point = geometry.coordinates[i+1];
line_segment = this.create_line_segment_object(current_point, next_point );
point_arr[i] = line_segment;
}
return point_arr;
},
get_total_line_length: function(point_arr){
let total_line_distance = 0;
for (let i = 0; i < point_arr.length; i++){
total_line_distance += point_arr[i].get_segment_distance();
}
return total_line_distance;
},
find_line_segment: function( mid_point_distance, point_arr){
let current_line_distance = 0;
for (let i = 0; i < point_arr.length; i++){
current_line_distance += point_arr[i].get_segment_distance()
if( mid_point_distance < current_line_distance ){
return point_arr[i];
}
}
},
get_distance_from_line_endpoint_to_midpoint: function(line_segment, mid_point_distance, point_arr){
let current_line_distance = 0;
for (let i = 0; i < point_arr.length; i++){
current_line_distance += point_arr[i].get_segment_distance();
if (line_segment == point_arr[i])
{
return current_line_distance - mid_point_distance;
}
}
},
get_mid_point: function(point_1, point_2, g, line_length){
let x = 0;
let y = 0;
let mid_point = null;
x = (point_1.x + (g/line_length) * (point_2.x - point_1.x));
y = (point_1.y + (g/line_length) * (point_2.y - point_1.y));
mid_point = new Point(x, y);
return mid_point;
},
create_line_segment_object: function(point_a, point_b){
let current_point = null;
let next_point = null;
let line_segment = null;
current_point = new Point(point_a[0], point_a[1])
next_point = new Point(point_b[0], point_b[1])
line_segment = new LineSegment(current_point, next_point)
return line_segment;
},
add_symbol: function(point, map, symbol){
var svgElementBounds = null;
var svgElement = null;
svgElement = document.createElementNS("http://www.w3.org/2000/svg", "svg");
svgElement.setAttribute('xmlns', "http://www.w3.org/2000/svg");
svgElement.innerHTML = symbol;
svgElementBounds = [ [ point.y - 0.05, point.x + 0.05 ], [ point.y , point.x ] ];
const addedSymbol = L.svgOverlay(svgElement, svgElementBounds).addTo(map);
this.symbols.push(addedSymbol);
},
remove_symbols: function(map){
for (var i = 0; i < this.symbols.length; i++) {
this.symbols[i].removeFrom(map);
}
this.symbols = [];
},
create_svg(symbol)
{
var svgElement = null;
svgElement = document.createElementNS("http://www.w3.org/2000/svg", "svg");
svgElement.setAttribute('xmlns', "http://www.w3.org/2000/svg");
svgElement.innerHTML = symbol;
return svgElement;
}
});
L.SLDStyler.defaultStyle = defaultStyle;
})();
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