Node / meshtastic / Meshtastic-Android / files / androidApp / src / main / kotlin / org / meshtastic / app / map / KmlImport.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

Tff7b72import T7ee787android.graphics.Bitmap

Tff7b72import T7ee787android.graphics.BitmapFactory

Tff7b72import T7ee787co.touchlab.kermit.Logger

Tff7b72import T7ee787org.meshtastic.feature.map.kml.KmlToGeoJson

Tff7b72import T7ee787org.meshtastic.feature.map.layers.MAX_KMZ_INFLATED_BYTES

Tff7b72import T7ee787java.io.ByteArrayOutputStream

Tff7b72import T7ee787java.io.InputStream

Tff7b72import T7ee787java.util.zip.ZipInputStream

T8b949e/**

* Reads an imported KML or KMZ and hands back the GeoJSON MapLibre and Google Maps can both draw.

*

* The conversion itself is [KmlToGeoJson] in `feature/map`, which is common code and takes the document as text. What

* stays here is the part that is genuinely a file: sniffing whether the import is a zip, pulling the KML out of it, and

* decoding the images packed beside it.

*

* [source] must be mark-capable — wrap it in a [java.io.BufferedInputStream] — because a KMZ is recognised by sniffing

* its first bytes rather than by trusting a file extension the content resolver often gets wrong.

*/

Tff7b72fun Td2a8ffconvertKmlSourceTb4b4b4(Te6edf3sourceTb4b4b4: Te6edf3InputStreamTb4b4b4)Tb4b4b4: Te6edf3ImportedKml? Tff7b72= Tff7b72if Tb4b4b4(Te6edf3sourceTb4b4b4.Te6edf3isKmzArchiveTb4b4b4(Tb4b4b4)Tb4b4b4) Tb4b4b4{

Te6edf3sourceTb4b4b4.Te6edf3readArchiveTb4b4b4(Tb4b4b4)

Tb4b4b4} Tff7b72else Tb4b4b4{

Te6edf3sourceTb4b4b4.Te6edf3readBytesTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3decodeToStringTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3toImportedKmlTb4b4b4(Te6edf3emptyMapTb4b4b4(Tb4b4b4)Tb4b4b4)

Tb4b4b4}

T8b949e/**

* Null only when the document holds nothing drawable at all. An overlay-only KML gets an empty `FeatureCollection`

* rather than being dropped — the overlays are the content, and every parser downstream needs valid JSON.

*/

Tff7b72private Tff7b72fun Te6edf3StringTb4b4b4.Td2a8fftoImportedKmlTb4b4b4(Te6edf3imagesTb4b4b4: Te6edf3MapTff7b72<Tffa657StringTb4b4b4, Te6edf3BitmapTff7b72>Tb4b4b4)Tb4b4b4: Te6edf3ImportedKml? Tb4b4b4{

Tff7b72val Te6edf3conversion Tff7b72= Te6edf3KmlToGeoJsonTb4b4b4.Te6edf3convertDocumentTb4b4b4(Tff7b72thisTb4b4b4)

Tff7b72if Tb4b4b4(Te6edf3conversionTb4b4b4.Te6edf3geoJson Tff7b72=Tff7b72= Tff7b72null Tff7b72&Tff7b72& Te6edf3conversionTb4b4b4.Te6edf3groundOverlaysTb4b4b4.Te6edf3isEmptyTb4b4b4(Tb4b4b4)Tb4b4b4) Tff7b72return Tff7b72null

Tff7b72return Te6edf3ImportedKmlTb4b4b4(

Te6edf3geoJson Tff7b72= Te6edf3conversionTb4b4b4.Te6edf3geoJson Tff7b72?: Te6edf3EMPTY_FEATURE_COLLECTIONTb4b4b4,

Te6edf3images Tff7b72= Te6edf3imagesTb4b4b4,

Te6edf3groundOverlays Tff7b72= Te6edf3conversionTb4b4b4.Te6edf3groundOverlaysTb4b4b4,

Tb4b4b4)

Tb4b4b4}

Tff7b72private Tff7b72const Tff7b72val Te6edf3EMPTY_FEATURE_COLLECTION Tff7b72= Ta5d6ff"""Ta5d6ff{Ta5d6ff"Ta5d6fftypeTa5d6ff"Ta5d6ff:Ta5d6ff"Ta5d6ffFeatureCollectionTa5d6ff"Ta5d6ff,Ta5d6ff"Ta5d6fffeaturesTa5d6ff"Ta5d6ff:[]}Ta5d6ff"""

T8b949e/**

* The KML in an archive, and every image beside it.

*

* By convention the document is `doc.kml` at the root, but exporters disagree and some nest it, so the first entry with

* the extension wins rather than a fixed name. The zip is walked once: a second pass would mean holding the whole

* archive in memory or reopening a stream the caller does not own.

*/

Tff7b72private Tff7b72fun Te6edf3InputStreamTb4b4b4.Td2a8ffreadArchiveTb4b4b4(Tb4b4b4)Tb4b4b4: Te6edf3ImportedKml? Tb4b4b4{

Tff7b72var Te6edf3kmlTb4b4b4: Tffa657String? Tff7b72= Tff7b72null

Tff7b72val Te6edf3images Tff7b72= Te6edf3mutableMapOfTff7b72<Tffa657StringTb4b4b4, Te6edf3BitmapTff7b72>Tb4b4b4(Tb4b4b4)

T8b949e// One inflate budget across the whole archive: a zip's inflated size is unrelated to its size on disk, and these

T8b949e// files arrive through share-into-app. Entries past the cap are skipped — for an image that means the overlay or

T8b949e// icon naming it goes undrawn, which beats the OOM.

Tff7b72var Te6edf3budget Tff7b72= Te6edf3MAX_KMZ_INFLATED_BYTES

Te6edf3ZipInputStreamTb4b4b4(Tff7b72thisTb4b4b4)Tb4b4b4.Te6edf3use Tb4b4b4{ Te6edf3zip Tff7b72-Tff7b72>

Te6edf3generateSequence Tb4b4b4{ Te6edf3zipTb4b4b4.Te6edf3nextEntry Tb4b4b4}

Tb4b4b4.Te6edf3filterNot Tb4b4b4{ Tffa657itTb4b4b4.Te6edf3isDirectory Tb4b4b4}

Tb4b4b4.Te6edf3forEach Tb4b4b4{ Te6edf3entry Tff7b72-Tff7b72>

Tff7b72val Te6edf3bytes Tff7b72= Te6edf3zipTb4b4b4.Te6edf3readEntryWithinTb4b4b4(Te6edf3budgetTb4b4b4) Tff7b72?: Tff7b72returnTf0883e@forEach

Te6edf3budget Tff7b72-Tff7b72= Te6edf3bytesTb4b4b4.Te6edf3size

Tff7b72when Tb4b4b4{

Te6edf3kml Tff7b72=Tff7b72= Tff7b72null Tff7b72&Tff7b72& Te6edf3entryTb4b4b4.Te6edf3nameTb4b4b4.Te6edf3endsWithTb4b4b4(Ta5d6ff"Ta5d6ff.kmlTa5d6ff"Tb4b4b4, Te6edf3ignoreCase Tff7b72= Tff7b72trueTb4b4b4) Tff7b72-Tff7b72> Te6edf3kml Tff7b72= Te6edf3bytesTb4b4b4.Te6edf3decodeToStringTb4b4b4(Tb4b4b4)

T8b949e// Anything else that decodes as an image is one a placemark may name; anything that does not is

T8b949e// some other file the exporter packed, and is skipped without complaint.

Tff7b72else Tff7b72-Tff7b72> Te6edf3BitmapFactoryTb4b4b4.Te6edf3decodeByteArrayTb4b4b4(Te6edf3bytesTb4b4b4, T79c0ff0Tb4b4b4, Te6edf3bytesTb4b4b4.Te6edf3sizeTb4b4b4)Tff7b72?.Te6edf3let Tb4b4b4{ Te6edf3imagesTff7b72[Te6edf3entryTb4b4b4.Te6edf3nameTff7b72] Tff7b72= Tffa657it Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

Tff7b72return Te6edf3kmlTff7b72?.Te6edf3toImportedKmlTb4b4b4(Te6edf3imagesTb4b4b4)

Tb4b4b4}

T8b949e/**

* This entry inflated, or null once it would take the archive past [remaining] bytes.

*

* Enforced on the bytes actually produced rather than the entry header, which a hostile zip lies in.

* `InputStream.readNBytes` would do this but is API 33+; minSdk is 26.

*/

Tff7b72private Tff7b72fun Te6edf3ZipInputStreamTb4b4b4.Td2a8ffreadEntryWithinTb4b4b4(Te6edf3remainingTb4b4b4: Tffa657LongTb4b4b4)Tb4b4b4: Te6edf3ByteArray? Tb4b4b4{

Tff7b72val Te6edf3out Tff7b72= Te6edf3ByteArrayOutputStreamTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3buffer Tff7b72= Te6edf3ByteArrayTb4b4b4(Te6edf3DEFAULT_BUFFER_SIZETb4b4b4)

Tff7b72while Tb4b4b4(Tff7b72trueTb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3read Tff7b72= Te6edf3readTb4b4b4(Te6edf3bufferTb4b4b4)

Tff7b72if Tb4b4b4(Te6edf3read Tff7b72=Tff7b72= Tff7b72-T79c0ff1Tb4b4b4) Tff7b72return Tff7b72outTb4b4b4.Te6edf3toByteArrayTb4b4b4(Tb4b4b4)

Tff7b72if Tb4b4b4(Tff7b72outTb4b4b4.Te6edf3sizeTb4b4b4(Tb4b4b4) Tff7b72+ Te6edf3read Tff7b72> Te6edf3remainingTb4b4b4) Tb4b4b4{

Te6edf3LoggerTb4b4b4.Te6edf3withTagTb4b4b4(Ta5d6ff"Ta5d6ffKmlImportTa5d6ff"Tb4b4b4)Tb4b4b4.Te6edf3w Tb4b4b4{ Ta5d6ff"Ta5d6ffRefusing a KMZ entry past the Tffd700${Te6edf3MAX_KMZ_INFLATED_BYTESTffd700}Ta5d6ffB inflate capTa5d6ff" Tb4b4b4}

Tff7b72return Tff7b72null

Tb4b4b4}

Tff7b72outTb4b4b4.Te6edf3writeTb4b4b4(Te6edf3bufferTb4b4b4, T79c0ff0Tb4b4b4, Te6edf3readTb4b4b4)

Tb4b4b4}

Tb4b4b4}