Add support for local pmtiles tile package (via drag and drop)

package.json

@@ -65,6 +65,7 @@
     "react-collapse": "^5.1.1",
     "react-color": "^2.19.3",
     "react-dom": "^18.2.0",
+    "react-dropzone": "^14.3.5",
     "react-file-reader-input": "^2.0.0",
     "react-i18next": "^15.4.0",
     "react-icon-base": "^2.1.2",

src/components/App.tsx

@@ -8,7 +8,7 @@ import get from 'lodash.get'
 import {unset} from 'lodash'
 import {arrayMoveMutable} from 'array-move'
 import hash from "string-hash";
-import { PMTiles } from "pmtiles";
+import { FileSource, PMTiles } from 'pmtiles';
 import {Map, LayerSpecification, StyleSpecification, ValidationError, SourceSpecification} from 'maplibre-gl'
 import {latest, validateStyleMin} from '@maplibre/maplibre-gl-style-spec'
 
@@ -131,6 +131,7 @@ type AppState = {
     debug: boolean
   }
   fileHandle: FileSystemFileHandle | null
+  file: PMTiles | null
 }
 
 export default class App extends React.Component<any, AppState> {
@@ -287,6 +288,7 @@ export default class App extends React.Component<any, AppState> {
         debugToolbox: false,
       },
       fileHandle: null,
+      file: null
     }
 
     this.layerWatcher = new LayerWatcher({
@@ -741,6 +743,7 @@ export default class App extends React.Component<any, AppState> {
         onChange={this.onMapChange}
         options={this.state.maplibreGlDebugOptions}
         inspectModeEnabled={this.state.mapState === "inspect"}
+        file={this.state.file}
         highlightedLayer={this.state.mapStyle.layers[this.state.selectedLayerIndex]}
         onLayerSelect={this.onLayerSelect} />
     }
@@ -881,6 +884,14 @@ export default class App extends React.Component<any, AppState> {
     });
   }
 
+  onFileSelected = (e: File[]) => {
+    const file = e[0];
+    const pmt = new PMTiles(new FileSource(file));
+    this.setState({
+      file: pmt
+    })
+  }
+
   render() {
     const layers = this.state.mapStyle.layers || []
     const selectedLayer = layers.length > 0 ? layers[this.state.selectedLayerIndex] : undefined
@@ -895,6 +906,7 @@ export default class App extends React.Component<any, AppState> {
       onStyleOpen={this.onStyleChanged}
       onSetMapState={this.setMapState}
       onToggleModal={this.toggleModal.bind(this)}
+      onFileSelected={this.onFileSelected}
     />
 
     const layerList = <LayerList

src/components/AppToolbar.tsx

@@ -17,6 +17,8 @@ import maputnikLogo from 'maputnik-design/logos/logo-color.svg?inline'
 import { withTranslation, WithTranslation } from 'react-i18next';
 import { supportedLanguages } from '../i18n';
 
+import Dropzone from 'react-dropzone'; // for class components
+
 // This is required because of <https://stackoverflow.com/a/49846426>, there isn't another way to detect support that I'm aware of.
 const browser = detect();
 const colorAccessibilityFiltersEnabled = ['chrome', 'firefox'].indexOf(browser!.name) > -1;
@@ -103,6 +105,7 @@ type AppToolbarInternalProps = {
   onSetMapState(mapState: MapState): unknown
   mapState?: MapState
   renderer?: string
+  onFileSelected(...args: unknown[]): unknown
 } & WithTranslation;
 
 class AppToolbarInternal extends React.Component<AppToolbarInternalProps> {
@@ -289,6 +292,15 @@ class AppToolbarInternal extends React.Component<AppToolbarInternalProps> {
             <MdHelpOutline />
             <IconText>{t("Help")}</IconText>
           </ToolbarLink>
+
+          <Dropzone onDrop={this.props.onFileSelected}>
+            {({getRootProps, getInputProps}) => (
+              <div {...getRootProps({className: 'dropzone maputnik-toolbar-link'})}>
+                <input {...getInputProps()} />
+                Drop file here
+              </div>
+            )}
+          </Dropzone>
         </div>
       </div>
     </nav>

src/components/MapMaplibreGl.tsx

@@ -15,7 +15,7 @@ import MaplibreGeocoder, { MaplibreGeocoderApi, MaplibreGeocoderApiConfig } from
 import '@maplibre/maplibre-gl-geocoder/dist/maplibre-gl-geocoder.css';
 import { withTranslation, WithTranslation } from 'react-i18next'
 import i18next from 'i18next'
-import { Protocol } from "pmtiles";
+import { PMTiles, Protocol } from "pmtiles";
 
 function renderPopup(popup: JSX.Element, mountNode: ReactDOM.Container): HTMLElement {
   ReactDOM.render(popup, mountNode);
@@ -66,6 +66,7 @@ type MapMaplibreGlInternalProps = {
   }
   replaceAccessTokens(mapStyle: StyleSpecification): StyleSpecification
   onChange(value: {center: LngLat, zoom: number}): unknown
+  file: PMTiles | null;
 } & WithTranslation;
 
 type MapMaplibreGlState = {
@@ -74,6 +75,7 @@ type MapMaplibreGlState = {
   geocoder: MaplibreGeocoder | null;
   zoomControl: ZoomControl | null;
   zoom?: number;
+  protocol: Protocol | null;
 };
 
 class MapMaplibreGlInternal extends React.Component<MapMaplibreGlInternalProps, MapMaplibreGlState> {
@@ -93,6 +95,7 @@ class MapMaplibreGlInternal extends React.Component<MapMaplibreGlInternalProps,
       inspect: null,
       geocoder: null,
       zoomControl: null,
+      protocol: new Protocol({metadata: true})
     }
     i18next.on('languageChanged', () => {
       this.forceUpdate();
@@ -134,7 +137,21 @@ class MapMaplibreGlInternal extends React.Component<MapMaplibreGlInternalProps,
         this.state.inspect!.render();
       }, 500);
     }
-
+
+    if (this.props.file) {
+      const file = this.props.file;
+      this.state.protocol!.add(file); // this is necessary for non-HTTP sources
+
+      if (map) {
+        file.getMetadata().then((metadata: any) => {
+          const layerNames = metadata.vector_layers.map((e: LayerSpecification) => e.id);
+
+          map.style.sourceCaches["source"]._source.vectorLayerIds = layerNames;
+          console.log("layerNames for inspect:", layerNames);
+        });
+      }
+    }
+
   }
 
   componentDidMount() {
@@ -149,8 +166,9 @@ class MapMaplibreGlInternal extends React.Component<MapMaplibreGlInternalProps,
       localIdeographFontFamily: false
     } satisfies MapOptions;
 
-    const protocol = new Protocol({metadata: true});
-    MapLibreGl.addProtocol("pmtiles",protocol.tile);
+    const protocol = this.state.protocol;
+    MapLibreGl.addProtocol("pmtiles", protocol!.tile);
+
     const map = new MapLibreGl.Map(mapOpts);
 
     const mapViewChange = () => {