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467 lines
14 KiB
JavaScript
467 lines
14 KiB
JavaScript
import _extend from 'lodash-es/extend';
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import _map from 'lodash-es/map';
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import _uniq from 'lodash-es/uniq';
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import { geoArea as d3_geoArea } from 'd3-geo';
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import { geoExtent, geoVecCross } from '../geo';
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import { osmEntity } from './entity';
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import { osmLanes } from './lanes';
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import { osmOneWayTags } from './tags';
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import { areaKeys } from '../core/context';
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export function osmWay() {
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if (!(this instanceof osmWay)) {
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return (new osmWay()).initialize(arguments);
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} else if (arguments.length) {
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this.initialize(arguments);
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}
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}
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osmEntity.way = osmWay;
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osmWay.prototype = Object.create(osmEntity.prototype);
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_extend(osmWay.prototype, {
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type: 'way',
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nodes: [],
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copy: function(resolver, copies) {
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if (copies[this.id])
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return copies[this.id];
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var copy = osmEntity.prototype.copy.call(this, resolver, copies);
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var nodes = this.nodes.map(function(id) {
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return resolver.entity(id).copy(resolver, copies).id;
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});
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copy = copy.update({ nodes: nodes });
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copies[this.id] = copy;
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return copy;
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},
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extent: function(resolver) {
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return resolver.transient(this, 'extent', function() {
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var extent = geoExtent();
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for (var i = 0; i < this.nodes.length; i++) {
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var node = resolver.hasEntity(this.nodes[i]);
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if (node) {
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extent._extend(node.extent());
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}
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}
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return extent;
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});
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},
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first: function() {
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return this.nodes[0];
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},
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last: function() {
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return this.nodes[this.nodes.length - 1];
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},
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contains: function(node) {
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return this.nodes.indexOf(node) >= 0;
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},
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affix: function(node) {
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if (this.nodes[0] === node) return 'prefix';
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if (this.nodes[this.nodes.length - 1] === node) return 'suffix';
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},
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layer: function() {
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// explicit layer tag, clamp between -10, 10..
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if (isFinite(this.tags.layer)) {
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return Math.max(-10, Math.min(+(this.tags.layer), 10));
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}
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// implied layer tag..
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if (this.tags.covered === 'yes') return -1;
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if (this.tags.location === 'overground') return 1;
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if (this.tags.location === 'underground') return -1;
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if (this.tags.location === 'underwater') return -10;
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if (this.tags.power === 'line') return 10;
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if (this.tags.power === 'minor_line') return 10;
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if (this.tags.aerialway) return 10;
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if (this.tags.bridge) return 1;
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if (this.tags.cutting) return -1;
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if (this.tags.tunnel) return -1;
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if (this.tags.waterway) return -1;
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if (this.tags.man_made === 'pipeline') return -10;
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if (this.tags.boundary) return -10;
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return 0;
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},
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isOneWay: function() {
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// explicit oneway tag..
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var values = {
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'yes': true,
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'1': true,
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'-1': true,
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'reversible': true,
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'alternating': true,
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'no': false,
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'0': false
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};
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if (values[this.tags.oneway] !== undefined) {
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return values[this.tags.oneway];
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}
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// implied oneway tag..
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for (var key in this.tags) {
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if (key in osmOneWayTags && (this.tags[key] in osmOneWayTags[key]))
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return true;
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}
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return false;
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},
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lanes: function() {
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return osmLanes(this);
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},
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isClosed: function() {
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return this.nodes.length > 1 && this.first() === this.last();
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},
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isConvex: function(resolver) {
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if (!this.isClosed() || this.isDegenerate()) return null;
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var nodes = _uniq(resolver.childNodes(this));
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var coords = _map(nodes, 'loc');
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var curr = 0;
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var prev = 0;
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for (var i = 0; i < coords.length; i++) {
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var o = coords[(i+1) % coords.length];
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var a = coords[i];
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var b = coords[(i+2) % coords.length];
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var res = geoVecCross(a, b, o);
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curr = (res > 0) ? 1 : (res < 0) ? -1 : 0;
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if (curr === 0) {
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continue;
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} else if (prev && curr !== prev) {
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return false;
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}
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prev = curr;
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}
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return true;
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},
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isArea: function() {
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// `highway` and `railway` are typically linear features, but there
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// are a few exceptions that should be treated as areas, even in the
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// absence of a proper `area=yes` or `areaKeys` tag.. see #4194
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var lineKeys = {
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highway: {
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rest_area: true,
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services: true
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},
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railway: {
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roundhouse: true,
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station: true,
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traverser: true,
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turntable: true,
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wash: true
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}
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};
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if (this.tags.area === 'yes')
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return true;
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if (!this.isClosed() || this.tags.area === 'no')
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return false;
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for (var key in this.tags) {
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if (key in areaKeys && !(this.tags[key] in areaKeys[key])) {
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return true;
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}
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if (key in lineKeys && this.tags[key] in lineKeys[key]) {
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return true;
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}
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}
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return false;
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},
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isDegenerate: function() {
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return _uniq(this.nodes).length < (this.isArea() ? 3 : 2);
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},
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areAdjacent: function(n1, n2) {
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for (var i = 0; i < this.nodes.length; i++) {
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if (this.nodes[i] === n1) {
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if (this.nodes[i - 1] === n2) return true;
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if (this.nodes[i + 1] === n2) return true;
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}
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}
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return false;
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},
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geometry: function(graph) {
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return graph.transient(this, 'geometry', function() {
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return this.isArea() ? 'area' : 'line';
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});
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},
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// If this way is not closed, append the beginning node to the end of the nodelist to close it.
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close: function() {
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if (this.isClosed() || !this.nodes.length) return this;
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var nodes = this.nodes.slice();
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nodes = nodes.filter(noRepeatNodes);
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nodes.push(nodes[0]);
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return this.update({ nodes: nodes });
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},
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// If this way is closed, remove any connector nodes from the end of the nodelist to unclose it.
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unclose: function() {
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if (!this.isClosed()) return this;
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var nodes = this.nodes.slice(),
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connector = this.first(),
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i = nodes.length - 1;
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// remove trailing connectors..
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while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
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nodes.splice(i, 1);
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i = nodes.length - 1;
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}
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nodes = nodes.filter(noRepeatNodes);
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return this.update({ nodes: nodes });
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},
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// Adds a node (id) in front of the node which is currently at position index.
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// If index is undefined, the node will be added to the end of the way for linear ways,
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// or just before the final connecting node for circular ways.
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// Consecutive duplicates are eliminated including existing ones.
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// Circularity is always preserved when adding a node.
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addNode: function(id, index) {
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var nodes = this.nodes.slice(),
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isClosed = this.isClosed(),
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max = isClosed ? nodes.length - 1 : nodes.length;
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if (index === undefined) {
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index = max;
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}
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if (index < 0 || index > max) {
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throw new RangeError('index ' + index + ' out of range 0..' + max);
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}
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// If this is a closed way, remove all connector nodes except the first one
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// (there may be duplicates) and adjust index if necessary..
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if (isClosed) {
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var connector = this.first();
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// leading connectors..
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var i = 1;
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while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
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nodes.splice(i, 1);
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if (index > i) index--;
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}
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// trailing connectors..
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i = nodes.length - 1;
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while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
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nodes.splice(i, 1);
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if (index > i) index--;
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i = nodes.length - 1;
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}
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}
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nodes.splice(index, 0, id);
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nodes = nodes.filter(noRepeatNodes);
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// If the way was closed before, append a connector node to keep it closed..
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if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
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nodes.push(nodes[0]);
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}
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return this.update({ nodes: nodes });
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},
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// Replaces the node which is currently at position index with the given node (id).
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// Consecutive duplicates are eliminated including existing ones.
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// Circularity is preserved when updating a node.
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updateNode: function(id, index) {
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var nodes = this.nodes.slice(),
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isClosed = this.isClosed(),
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max = nodes.length - 1;
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if (index === undefined || index < 0 || index > max) {
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throw new RangeError('index ' + index + ' out of range 0..' + max);
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}
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// If this is a closed way, remove all connector nodes except the first one
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// (there may be duplicates) and adjust index if necessary..
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if (isClosed) {
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var connector = this.first();
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// leading connectors..
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var i = 1;
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while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
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nodes.splice(i, 1);
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if (index > i) index--;
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}
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// trailing connectors..
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i = nodes.length - 1;
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while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
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nodes.splice(i, 1);
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if (index === i) index = 0; // update leading connector instead
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i = nodes.length - 1;
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}
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}
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nodes.splice(index, 1, id);
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nodes = nodes.filter(noRepeatNodes);
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// If the way was closed before, append a connector node to keep it closed..
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if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
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nodes.push(nodes[0]);
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}
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return this.update({nodes: nodes});
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},
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// Replaces each occurrence of node id needle with replacement.
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// Consecutive duplicates are eliminated including existing ones.
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// Circularity is preserved.
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replaceNode: function(needle, replacement) {
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var nodes = this.nodes.slice(),
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isClosed = this.isClosed();
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for (var i = 0; i < nodes.length; i++) {
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if (nodes[i] === needle) {
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nodes[i] = replacement;
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}
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}
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nodes = nodes.filter(noRepeatNodes);
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// If the way was closed before, append a connector node to keep it closed..
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if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
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nodes.push(nodes[0]);
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}
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return this.update({nodes: nodes});
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},
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// Removes each occurrence of node id needle with replacement.
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// Consecutive duplicates are eliminated including existing ones.
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// Circularity is preserved.
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removeNode: function(id) {
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var nodes = this.nodes.slice(),
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isClosed = this.isClosed();
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nodes = nodes
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.filter(function(node) { return node !== id; })
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.filter(noRepeatNodes);
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// If the way was closed before, append a connector node to keep it closed..
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if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
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nodes.push(nodes[0]);
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}
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return this.update({nodes: nodes});
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},
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asJXON: function(changeset_id) {
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var r = {
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way: {
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'@id': this.osmId(),
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'@version': this.version || 0,
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nd: _map(this.nodes, function(id) {
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return { keyAttributes: { ref: osmEntity.id.toOSM(id) } };
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}),
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tag: _map(this.tags, function(v, k) {
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return { keyAttributes: { k: k, v: v } };
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})
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}
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};
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if (changeset_id) {
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r.way['@changeset'] = changeset_id;
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}
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return r;
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},
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asGeoJSON: function(resolver) {
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return resolver.transient(this, 'GeoJSON', function() {
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var coordinates = _map(resolver.childNodes(this), 'loc');
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if (this.isArea() && this.isClosed()) {
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return {
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type: 'Polygon',
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coordinates: [coordinates]
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};
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} else {
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return {
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type: 'LineString',
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coordinates: coordinates
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};
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}
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});
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},
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area: function(resolver) {
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return resolver.transient(this, 'area', function() {
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var nodes = resolver.childNodes(this);
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var json = {
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type: 'Polygon',
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coordinates: [_map(nodes, 'loc')]
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};
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if (!this.isClosed() && nodes.length) {
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json.coordinates[0].push(nodes[0].loc);
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}
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var area = d3_geoArea(json);
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// Heuristic for detecting counterclockwise winding order. Assumes
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// that OpenStreetMap polygons are not hemisphere-spanning.
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if (area > 2 * Math.PI) {
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json.coordinates[0] = json.coordinates[0].reverse();
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area = d3_geoArea(json);
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}
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return isNaN(area) ? 0 : area;
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});
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}
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});
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// Filter function to eliminate consecutive duplicates.
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function noRepeatNodes(node, i, arr) {
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return i === 0 || node !== arr[i - 1];
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}
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