338 lines
13 KiB
TypeScript
338 lines
13 KiB
TypeScript
import { Component, Host, Input, Output, EventEmitter, Optional, QueryList, OnInit, AfterViewInit, OnChanges, SimpleChanges, SkipSelf, forwardRef, Inject, InjectionToken } from '@angular/core';
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import { HttpClient } from "@angular/common/http";
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import { LayerVectorComponent, LayerTileComponent, LayerGroupComponent, MapComponent } from 'ngx-openlayers';
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import { ItemService,IItem,AppConfig } from '@farmmaps/common';
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import { IItemLayer,ItemLayer, ITemporalItemLayer} from '../../../models/item.layer';
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import { ILayerData} from '../../../models/layer.data';
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import { IRenderoutputTiles,IRenderoutputImage,IGradientstop,ILayer,IHistogram} from '../../../models/color.map';
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import {Extent} from 'ol/extent';
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import Projection from 'ol/proj/Projection';
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import * as proj from 'ol/proj';
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import * as loadingstrategy from 'ol/loadingstrategy';
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import * as style from 'ol/style';
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import {Tile,Layer,Image} from 'ol/layer';
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import {XYZ,ImageStatic,OSM,BingMaps,TileWMS,TileArcGISRest,TileJSON} from 'ol/source';
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import {Vector as VectorSource} from 'ol/source';
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import { Vector as VectorLayer } from 'ol/layer';
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import VectorTileSource from 'ol/source/VectorTile';
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import VectorTileLayer from 'ol/layer/VectorTile';
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import {GeoJSON,MVT} from 'ol/format';
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import { from } from 'rxjs';
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@Component({
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selector: 'fm-map-item-layers',
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template: `<ng-content></ng-content>`,
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providers: [
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{ provide: LayerGroupComponent, useExisting: forwardRef(() => ItemLayersComponent) }
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]
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})
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export class ItemLayersComponent extends LayerGroupComponent implements OnChanges, OnInit {
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@Input() itemLayers: IItemLayer[];
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@Input() itemLayer: IItemLayer;
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private _apiEndPoint: string;
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constructor(private itemService: ItemService, @Host() private map: MapComponent, public appConfig: AppConfig) {
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super(map);
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this._apiEndPoint = appConfig.getConfig("apiEndPoint");
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}
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private styleCache = {}
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componentToHex(c) {
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var hex = c.toString(16);
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return hex.length == 1 ? "0" + hex : hex;
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}
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rgbaToHex(r, g, b,a) {
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return "#" + this.componentToHex(r) + this.componentToHex(g) + this.componentToHex(b) + this.componentToHex(a);
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}
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getColorFromGradient(layer: ILayer, feature): style.Style {
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var value = feature.get(layer.name);
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var gradient: IGradientstop[] = layer.renderer.colorMap.gradient;
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var histogram: IHistogram = layer.renderer.band.histogram;
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var index = (value - histogram.min) / histogram.max;
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var min = gradient[0];
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var max = gradient[gradient.length - 1];
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for (var n = 0; n < gradient.length; n++) {
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var s = gradient[n];
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if (s.relativestop <= index && min.relativestop < s.relativestop && n < gradient.length - 1) min = s;
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if (s.relativestop >= index && max.relativestop > s.relativestop && n > 0) max = s;
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}
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var i = index - min.relativestop;
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var size = max.relativestop - min.relativestop;
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var alpha = Math.round( min.color.alpha + ((max.color.alpha - min.color.alpha) * i / size));
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var red = Math.round(min.color.red + ((max.color.red - min.color.red) * i / size));
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var green = Math.round(min.color.green + ((max.color.green - min.color.green) * i / size));
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var blue = Math.round(min.color.blue + ((max.color.blue - min.color.blue) * i / size));
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return new style.Style(
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{
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image: new style.Circle({
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fill: new style.Fill({
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color: this.rgbaToHex(red,green,blue,alpha)
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}),
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radius: 3
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}),
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fill: new style.Fill({
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color: this.rgbaToHex(red, green, blue, alpha)
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}),
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stroke: new style.Stroke({
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color: this.rgbaToHex(red, green, blue, alpha),
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width: 1.25
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}),
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});
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}
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createGeotiffLayer(item:IItem,itemLayer:IItemLayer):Layer {
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var layerIndex = -1;
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var layer: Layer = null;
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layerIndex = itemLayer.layerIndex != -1 ? itemLayer.layerIndex : item.data.layers[0].index;
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let source = new XYZ({ maxZoom: 19, minZoom: 1, url: `${this._apiEndPoint}/api/v1/items/${item.code}/tiles/${layerIndex}/{z}/{x}/{y}.png?v=${Date.parse(item.updated)}` });
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layer = new Tile({ source: source });
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var data = item.data;
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var l = (data && data.layers && data.layers.length > 0) ? data.layers[0] : null;
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if (l && l.rendering && l.rendering.renderoutputType == "Tiles") {
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var rt = l.rendering as IRenderoutputTiles;
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let source = new XYZ({ maxZoom: rt.maxzoom, minZoom: rt.minzoom, url: `${this._apiEndPoint}/api/v1/items/${item.code}/tiles/${layerIndex}/{z}/{x}/{y}.png?v=${Date.parse(item.updated)}` });
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layer = new Tile({ source: source });
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}
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if (l && l.rendering && l.rendering.renderoutputType == "Image") {
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var ri = l.rendering as IRenderoutputImage;
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let projection = new Projection({
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code: 'image',
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units: 'pixels',
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extent: ri.extent
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});
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let source = new ImageStatic({ imageExtent: ri.extent, projection: projection, url: `${this._apiEndPoint}/api/v1/items/${item.code}/mapimage/${layerIndex}?v=${Date.parse(item.updated)}` });
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layer = new Image({ source: source });
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}
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return layer;
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}
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createShapeLayer(item:IItem,itemLayer:IItemLayer):Layer {
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var layerIndex = -1;
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var layer: Layer = null;
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layerIndex = itemLayer.layerIndex != -1 ? itemLayer.layerIndex : item.data.layers[0].index;
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var data = item.data;
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var l = (data && data.layers && data.layers.length > 0) ? data.layers[0] : null;
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if (l && l.rendering && l.rendering.renderoutputType == "VectorTiles") {
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var rt = item.data.layers[layerIndex].rendering as IRenderoutputTiles;
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layer = new VectorTileLayer({
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declutter: true,
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source: new VectorTileSource({
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maxZoom: rt.maxzoom,
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minZoom: rt.minzoom,
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format: new MVT(),
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url: `${this._apiEndPoint}/api/v1/items/${item.code}/vectortiles/{z}/{x}/{y}.pbf?v=${Date.parse(item.updated)}`
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}),
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style: (feature) => {
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return this.getColorFromGradient(l, feature);
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}
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})
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} else if (l && l.rendering && l.rendering.renderoutputType == "Tiles") {
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var rt = l.rendering as IRenderoutputTiles;
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layer = new Tile({
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source: new XYZ({
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maxZoom: rt.maxzoom,
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minZoom: rt.minzoom,
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url: `${this._apiEndPoint}/api/v1/items/${item.code}/vectortiles/image_tiles/${layerIndex}/{z}/{x}/{y}.png?v=${Date.parse(item.updated)}`
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})
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});
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} else {
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let __this = this;
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let format = new GeoJSON();
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let source = new VectorSource({
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strategy: loadingstrategy.bbox,
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loader: function (extent: Extent, resolution: number, projection: Projection) {
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var source = this as VectorSource;
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__this.itemService.getItemFeatures(item.code, extent, projection.getCode(), layerIndex).subscribe(function (data) {
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var features = format.readFeatures(data);
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for (let f of features) {
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if (f.get("code")) {
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f.setId(f.get("code"));
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}
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}
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source.addFeatures(features);
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});
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}
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});
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layer = new VectorLayer({
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source: source,
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style: (feature) => {
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var key = feature.get("color");
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if (!this.styleCache[key]) {
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var color = feature.get("color");
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this.styleCache[key] = new style.Style(
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{
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fill: new style.Fill({
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color: color
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}),
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stroke: new style.Stroke({
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color: color,
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width: 1.25
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}),
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image: new style.Circle({
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fill: new style.Fill({
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color: color
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}),
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stroke: new style.Stroke({
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color: color,
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width: 1.25
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}),
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radius: 5
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}),
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}
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)
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}
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return this.styleCache[key];
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}
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});
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}
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return layer;
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}
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createExternalLayer(item:IItem,itemLayer:IItemLayer):Layer {
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let data = item.data as ILayerData;
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var layer: Layer = null;
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switch (data.interfaceType) {
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case 'OSM': {
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let source = new OSM();
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layer = new Tile({ source: source });
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break;
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}
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case 'BingMaps': {
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let source = new BingMaps(data.options);
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layer = new Tile({ source: source });
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break;
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}
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case 'TileWMS': {
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let source = new TileWMS(data.options);
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layer = new Tile({ source: source });
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break;
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}
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case 'TileJSON': {
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let source = new TileJSON(data.options);
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layer = new Tile({ source: source });
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break;
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}
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case 'TileArcGISRest': {
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let source = new TileArcGISRest(data.options);
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layer = new Tile({ source: source });
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break;
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}
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case 'VectorWFSJson': {
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let source = new VectorSource({
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format: new GeoJSON(),
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url: function (extent) {
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return (
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data.options.url + '&srsname=' + data.projection +
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'&bbox=' +
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extent.join(',') +
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',EPSG:3857'
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);
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},
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strategy: loadingstrategy.bbox,
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});
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layer = new VectorLayer({ source: source });
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break;
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}
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default: {
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break;
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}
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}
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return layer;
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}
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createLayer(itemLayer: IItemLayer): Layer {
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var layer: Layer = null;
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var layerIndex = -1;
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if (itemLayer.item.itemType == 'vnd.farmmaps.itemtype.geotiff.processed') {
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layer = this.createGeotiffLayer(itemLayer.item,itemLayer);
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} else if (itemLayer.item.itemType == 'vnd.farmmaps.itemtype.shape.processed') {
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layer = this.createShapeLayer(itemLayer.item,itemLayer);
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} else if (itemLayer.item.itemType == 'vnd.farmmaps.itemtype.layer') {
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layer = this.createExternalLayer(itemLayer.item,itemLayer);
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}
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if (layer) {
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let geometry = new GeoJSON().readGeometry(itemLayer.item.geometry);
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let extent = geometry ? proj.transformExtent(geometry.getExtent(), 'EPSG:4326', 'EPSG:3857') : null;
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if (extent) layer.setExtent(extent);
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}
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return layer;
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}
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ngOnInit() {
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super.ngOnInit();
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this.updateLayers(this.itemLayers);
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}
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addOrUpdateOlLayer(itemLayer:IItemLayer,index:number):Layer {
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if(!itemLayer) return null;
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var olLayers = this.instance.getLayers();
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var layer = itemLayer.layer;
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let olIndex = olLayers.getArray().indexOf(layer);
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if (olIndex < 0) {
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// New layer: we add it to the map
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layer = this.createLayer(itemLayer);
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if (layer) {
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olLayers.insertAt(index, layer);
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}
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} else if (index !== olIndex) {
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// layer has moved inside the layers list
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olLayers.removeAt(olIndex);
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olLayers.insertAt(index, layer);
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}
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if(layer) {
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itemLayer.layer = layer;
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layer.setOpacity(itemLayer.opacity);
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layer.setVisible(itemLayer.visible);
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}
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return layer;
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}
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updateLayers(itemLayers: IItemLayer[]) {
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let newLayers: IItemLayer[] = [];
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if (itemLayers) {
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itemLayers.forEach((itemLayer, index) => {
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if(itemLayer.item.itemType == 'vnd.farmmaps.itemtype.temporal') {
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let il = itemLayer as ITemporalItemLayer;
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let previousLayer = this.addOrUpdateOlLayer(il.previousItemLayer,newLayers.length);
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if(previousLayer) newLayers.push(previousLayer);
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let selectedLayer = this.addOrUpdateOlLayer(il.selectedItemLayer,newLayers.length);
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if(selectedLayer) newLayers.push(selectedLayer);
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let nextLayer = this.addOrUpdateOlLayer(il.nextItemLayer,newLayers.length);
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if(nextLayer) newLayers.push(nextLayer);
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} else {
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let layer = this.addOrUpdateOlLayer(itemLayer,newLayers.length);
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if(layer) newLayers.push(layer);
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}
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});
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// Remove the layers that have disapeared from childrenLayers
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var olLayers = this.instance.getLayers();
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while(olLayers.getLength() > newLayers.length) {
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olLayers.removeAt(newLayers.length);
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}
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}
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}
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ngOnChanges(changes: SimpleChanges) {
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if (this.instance) {
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if (changes['itemLayers']) {
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var itemLayers = changes['itemLayers'].currentValue as IItemLayer[];
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this.updateLayers(itemLayers);
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}
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if (changes['itemLayer']) {
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var itemLayer = changes['itemLayer'].currentValue as IItemLayer;
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if(itemLayer) {
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this.updateLayers([itemLayer]);
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} else {
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this.updateLayers([]);
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}
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}
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}
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}
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}
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