Node / meshtastic / Meshtastic-Android / files / androidApp / src / google / kotlin / org / meshtastic / app / map / tiles / RasterTileProvider.kt

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T8b949e/*

* Copyright (c) 2026 Meshtastic LLC

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <https://www.gnu.org/licenses/>.

*/

Tff7b72package T7ee787org.meshtastic.app.map.tiles

Tff7b72import T7ee787co.touchlab.kermit.Logger

Tff7b72import T7ee787com.google.android.gms.maps.model.Tile

Tff7b72import T7ee787com.google.android.gms.maps.model.TileProvider

Tff7b72import T7ee787okhttp3.OkHttpClient

Tff7b72import T7ee787okhttp3.Request

Tff7b72import T7ee787org.meshtastic.feature.map.tiles.RasterTileSpec

Tff7b72import T7ee787org.meshtastic.feature.map.tiles.tileUrl

Tff7b72import T7ee787java.io.IOException

Tff7b72private Tff7b72val Te6edf3logger Tff7b72= Te6edf3LoggerTb4b4b4.Te6edf3withTagTb4b4b4(Ta5d6ff"Ta5d6ffRasterTileProviderTa5d6ff"Tb4b4b4)

T8b949e/**

* Draws a [RasterTileSpec] on the Google map, fetching its tiles through a caching HTTP client.

*

* Google's own `UrlTileProvider` opens a bare stream per tile and keeps nothing, so panning re-downloads tiles that

* were on screen a moment ago and the map blanks out behind the requests (#2714). Going through OkHttp gives the tiles

* a disk cache that honours what the tile server says about caching, which is what the MapLibre map gets from its

* renderer for free.

*/

Tff7b72class T56d364RasterTileProviderTb4b4b4(Tff7b72private Tff7b72val Te6edf3specTb4b4b4: Te6edf3RasterTileSpecTb4b4b4, Tff7b72private Tff7b72val Te6edf3clientTb4b4b4: Te6edf3OkHttpClientTb4b4b4) Tb4b4b4: Te6edf3TileProvider Tb4b4b4{

Tff7b72override Tff7b72fun Td2a8ffgetTileTb4b4b4(Te6edf3xTb4b4b4: Tffa657IntTb4b4b4, Te6edf3yTb4b4b4: Tffa657IntTb4b4b4, Te6edf3zoomTb4b4b4: Tffa657IntTb4b4b4)Tb4b4b4: Te6edf3Tile? Tb4b4b4{

T8b949e// NO_TILE means "there is definitively nothing here" and is cached as such; a zoom outside the source's range

T8b949e// is exactly that, whereas a failed fetch below is not and must stay retryable.

Tff7b72val Te6edf3url Tff7b72= Te6edf3specTb4b4b4.Te6edf3tileUrlTb4b4b4(Te6edf3xTb4b4b4, Te6edf3yTb4b4b4, Te6edf3zoomTb4b4b4) Tff7b72?: Tff7b72return Te6edf3TileProviderTb4b4b4.Te6edf3NO_TILE

Tff7b72return Te6edf3fetchTb4b4b4(Te6edf3urlTb4b4b4)

Tb4b4b4}

Tff7b72private Tff7b72fun Td2a8fffetchTb4b4b4(Te6edf3urlTb4b4b4: Tffa657StringTb4b4b4)Tb4b4b4: Te6edf3Tile? Tff7b72= Tff7b72try Tb4b4b4{

Te6edf3clientTb4b4b4.Te6edf3newCallTb4b4b4(Te6edf3RequestTb4b4b4.Te6edf3BuilderTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3urlTb4b4b4(Te6edf3urlTb4b4b4)Tb4b4b4.Te6edf3buildTb4b4b4(Tb4b4b4)Tb4b4b4)Tb4b4b4.Te6edf3executeTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3use Tb4b4b4{ Te6edf3response Tff7b72-Tff7b72>

Tff7b72if Tb4b4b4(Te6edf3responseTb4b4b4.Te6edf3isSuccessfulTb4b4b4) Tb4b4b4{

Te6edf3responseTb4b4b4.Te6edf3bodyTb4b4b4.Te6edf3bytesTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3takeIf Tb4b4b4{ Tffa657itTb4b4b4.Te6edf3isNotEmptyTb4b4b4(Tb4b4b4) Tb4b4b4}Tff7b72?.Te6edf3let Tb4b4b4{ Te6edf3TileTb4b4b4(Te6edf3specTb4b4b4.Te6edf3tileSizeTb4b4b4, Te6edf3specTb4b4b4.Te6edf3tileSizeTb4b4b4, Tffa657itTb4b4b4) Tb4b4b4}

Tb4b4b4} Tff7b72else Tb4b4b4{

Te6edf3loggerTb4b4b4.Te6edf3d Tb4b4b4{ Ta5d6ff"Ta5d6ffTile server answered Tffd700${Te6edf3responseTb4b4b4.Te6edf3codeTffd700}Ta5d6ff" Tb4b4b4}

Tff7b72null

Tb4b4b4}

Tb4b4b4}

Tb4b4b4} Tff7b72catch Tb4b4b4(Te6edf3eTb4b4b4: Te6edf3IOExceptionTb4b4b4) Tb4b4b4{

T8b949e// Offline, or the tile host is down. Null rather than NO_TILE, so the map asks again.

Te6edf3loggerTb4b4b4.Te6edf3dTb4b4b4(Te6edf3eTb4b4b4) Tb4b4b4{ Ta5d6ff"Ta5d6ffTile fetch failedTa5d6ff" Tb4b4b4}

Tff7b72null

Tb4b4b4} Tff7b72catch Tb4b4b4(Te6edf3eTb4b4b4: Te6edf3IllegalArgumentExceptionTb4b4b4) Tb4b4b4{

T8b949e// OkHttp rejected the URL the template produced. The template is the user's, so this is not ours to crash

T8b949e// on — but it will not fix itself either, so refuse the tile rather than retrying forever.

Te6edf3loggerTb4b4b4.Te6edf3wTb4b4b4(Te6edf3eTb4b4b4) Tb4b4b4{ Ta5d6ff"Ta5d6ffTile url rejectedTa5d6ff" Tb4b4b4}

Te6edf3TileProviderTb4b4b4.Te6edf3NO_TILE

Tb4b4b4}

Tb4b4b4}