progress

gpx-rs/engine/src/engine/command/command.rs

@@ -1,8 +1,8 @@
 use crate::{Apply, CommandError, State};
 use crate::{
-    Clean, Crop, Delete, DeleteAll, Duplicate, Elevation, Extract, Load, Merge, Metadata, Move,
+    Clean, Crop, Delete, DeleteAll, Duplicate, Elevation, Extract, Load, LoadFiles, Merge,
-    MoveWaypoint, New, NewTrack, NewTrackSegment, NewWaypoint, Paste, Reverse, SpliceTrackpoints,
+    Metadata, Move, MoveWaypoint, New, NewTrack, NewTrackSegment, NewWaypoint, Paste, Reverse,
-    Split, Style, Time,
+    SpliceTrackpoints, Split, Style, Time,
 };
 
 /// A user action that edits the files. Each variant wraps the command's own struct, whose
@@ -14,6 +14,7 @@ use crate::{
 pub enum Command<'a> {
     New(New<'a>),
     Load(Load<'a>),
+    LoadFiles(LoadFiles<'a>),
     Duplicate(Duplicate),
     Delete(Delete),
     Paste(Paste),
@@ -41,6 +42,7 @@ impl Apply for Command<'_> {
         match self {
             Command::New(c) => c.apply(state),
             Command::Load(c) => c.apply(state),
+            Command::LoadFiles(c) => c.apply(state),
             Command::Duplicate(c) => c.apply(state),
             Command::Delete(c) => c.apply(state),
             Command::Paste(c) => c.apply(state),

gpx-rs/engine/src/engine/command/file/load.rs

@@ -1,4 +1,4 @@
-use crate::{Apply, CommandError, State, parse, produce};
+use crate::{Apply, CommandError, File, State, parse, produce};
 
 #[derive(Debug)]
 pub struct Load<'a> {
@@ -8,14 +8,49 @@ pub struct Load<'a> {
     pub name: &'a str,
 }
 
-impl Apply for Load<'_> {
+impl Load<'_> {
-    fn apply(self, state: &mut State) -> Result<(), CommandError> {
+    fn parse(self) -> Result<File, CommandError> {
         let mut file =
             parse(self.data).map_err(|err| CommandError::InvalidData(err.to_string()))?;
         if file.info.name.trim().is_empty() {
             file.info.name = self.name.to_owned();
         }
-        produce(state, |_| vec![file]);
+        Ok(file)
+    }
+}
+
+impl Apply for Load<'_> {
+    fn apply(self, state: &mut State) -> Result<(), CommandError> {
+        LoadFiles { files: vec![self] }.apply(state)
+    }
+}
+
+/// Loads several files at once, as a single command (one undo step): the files are added at the
+/// end of the list, in the given order, and the first one is selected.
+///
+/// The files that cannot be read are skipped, unless none of them can: then nothing is loaded
+/// and the error is the one of the first file.
+#[derive(Debug)]
+pub struct LoadFiles<'a> {
+    pub files: Vec<Load<'a>>,
+}
+
+impl Apply for LoadFiles<'_> {
+    fn apply(self, state: &mut State) -> Result<(), CommandError> {
+        let mut files = Vec::with_capacity(self.files.len());
+        let mut first_error = None;
+        for load in self.files {
+            match load.parse() {
+                Ok(file) => files.push(file),
+                Err(error) => {
+                    first_error.get_or_insert(error);
+                }
+            }
+        }
+        if files.is_empty() {
+            return Err(first_error.unwrap_or(CommandError::NothingToDo));
+        }
+        produce(state, |_| files);
         Ok(())
     }
 }
@@ -85,4 +120,101 @@ mod tests {
         let empty = br#"<gpx version="1.1"><metadata><name>  </name></metadata></gpx>"#;
         assert_eq!(load_with_name(empty), "from disk");
     }
+
+    fn gpx(name: &str) -> Vec<u8> {
+        format!(r#"<gpx version="1.1"><metadata><name>{name}</name></metadata></gpx>"#).into_bytes()
+    }
+
+    fn load<'a>(data: &'a [u8], name: &'a str) -> Load<'a> {
+        Load { data, name }
+    }
+
+    #[test]
+    fn test_load_several_files() {
+        let mut fx = Fixture::default();
+        crate::New { name: "before" }
+            .apply(&mut fx.state())
+            .unwrap();
+        let before = fx.order.0[0];
+        let (a, b, c) = (gpx("a"), gpx("b"), gpx("c"));
+
+        LoadFiles {
+            files: vec![load(&a, "x"), load(&b, "x"), load(&c, "x")],
+        }
+        .apply(&mut fx.state())
+        .unwrap();
+
+        // added after the others, in the order they were given
+        let names: Vec<_> = fx
+            .order
+            .0
+            .iter()
+            .map(|id| fx.files[id].info.name.clone())
+            .collect();
+        assert_eq!(names, ["before", "a", "b", "c"]);
+        assert_eq!(fx.order.0[0], before);
+        // the first one is selected
+        assert_eq!(fx.selected_files(), [fx.order.0[1]].into());
+    }
+
+    #[test]
+    fn test_load_several_files_skips_the_invalid_ones() {
+        let mut fx = Fixture::default();
+        let (a, c) = (gpx("a"), gpx("c"));
+        LoadFiles {
+            files: vec![load(&a, "x"), load(b"<gpx><trk></gpx>", "x"), load(&c, "x")],
+        }
+        .apply(&mut fx.state())
+        .unwrap();
+        let names: Vec<_> = fx
+            .order
+            .0
+            .iter()
+            .map(|id| fx.files[id].info.name.clone())
+            .collect();
+        assert_eq!(names, ["a", "c"]);
+    }
+
+    #[test]
+    fn test_load_several_invalid_files_changes_nothing() {
+        let mut fx = Fixture::default();
+        crate::New { name: "keep" }.apply(&mut fx.state()).unwrap();
+        let selected = fx.selected_files();
+
+        let result = LoadFiles {
+            files: vec![
+                load(b"<gpx><trk></gpx>", "x"),
+                load(b"<gpx><wpt></gpx>", "y"),
+            ],
+        }
+        .apply(&mut fx.state());
+        assert!(matches!(result, Err(CommandError::InvalidData(_))));
+        assert_eq!(fx.files.len(), 1);
+        assert_eq!(fx.order.0.len(), 1);
+        assert_eq!(fx.selected_files(), selected);
+
+        // nothing to load
+        assert_eq!(
+            LoadFiles { files: vec![] }.apply(&mut fx.state()),
+            Err(CommandError::NothingToDo)
+        );
+    }
+
+    #[test]
+    fn test_each_file_without_name_gets_its_own_name() {
+        let mut fx = Fixture::default();
+        let unnamed = br#"<gpx version="1.1"><trk><trkseg></trkseg></trk></gpx>"#;
+        LoadFiles {
+            files: vec![load(unnamed, "first"), load(unnamed, "second")],
+        }
+        .apply(&mut fx.state())
+        .unwrap();
+        let names: Vec<_> = fx
+            .order
+            .0
+            .iter()
+            .map(|id| fx.files[id].info.name.clone())
+            .collect();
+        assert_eq!(names, ["first", "second"]);
+    }
 }

gpx-rs/engine/src/engine/engine.rs

@@ -1071,4 +1071,43 @@ mod tests {
         assert!(engine.execute(Action::Undo));
         assert_eq!(track_ids(&engine, a), tracks);
     }
+
+    #[test]
+    fn test_load_several_files_is_one_edit() {
+        use crate::LoadFiles;
+
+        let mut engine = Engine::default();
+        new(&mut engine, "before");
+        let gpx = |name: &str| {
+            format!(r#"<gpx version="1.1"><metadata><name>{name}</name></metadata></gpx>"#)
+                .into_bytes()
+        };
+        let (a, b) = (gpx("a"), gpx("b"));
+        assert!(edit(
+            &mut engine,
+            Command::LoadFiles(LoadFiles {
+                files: vec![
+                    Load {
+                        data: &a,
+                        name: "x"
+                    },
+                    Load {
+                        data: &b,
+                        name: "x"
+                    },
+                ],
+            })
+        ));
+        assert_eq!(engine.order().len(), 3);
+        let diff = engine.last_diff().unwrap();
+        assert_eq!(diff.added.len(), 2);
+        // the first one that was loaded is selected
+        assert_eq!(engine.selection(), &files(&[engine.order()[1]]));
+
+        // a single undo removes both
+        assert!(engine.execute(Action::Undo));
+        assert_eq!(engine.order().len(), 1);
+        assert!(engine.execute(Action::Redo));
+        assert_eq!(engine.order().len(), 3);
+    }
 }

gpx-rs/wasm/src/lib.rs

@@ -171,10 +171,26 @@ pub fn new_file(name: &str) -> bool {
     edit(Command::New(engine::New { name }))
 }
 
-/// `name`: the name of the file when the data has none (the name on disk, without extension).
+/// Loads files as a single command (one undo step). The files are in `data`, one after the
+/// other, `lengths` being the number of bytes of each one. `names`: the name of each file when
+/// its data has none (the name on disk, without extension). The files that cannot be read are
+/// skipped, the first one that was read is selected.
 #[wasm_bindgen]
-pub fn load_file(data: &[u8], name: &str) -> bool {
+pub fn load_files(data: &[u8], lengths: &[u32], names: Vec<String>) -> bool {
-    edit(Command::Load(engine::Load { data, name }))
+    if lengths.len() != names.len() {
+        return false;
+    }
+    let mut files = Vec::with_capacity(names.len());
+    let mut offset = 0;
+    for (length, name) in lengths.iter().zip(&names) {
+        let end = offset + *length as usize;
+        let Some(data) = data.get(offset..end) else {
+            return false;
+        };
+        files.push(engine::Load { data, name });
+        offset = end;
+    }
+    edit(Command::LoadFiles(engine::LoadFiles { files }))
 }
 
 #[wasm_bindgen]

website/src/lib/components/embedding/Embedding.svelte

@@ -7,7 +7,6 @@
     import LayerControl from '$lib/components/map/layer-control/LayerControl.svelte';
     import OpenIn from '$lib/components/embedding/OpenIn.svelte';
     import { writable } from 'svelte/store';
-    import type { GPXFile } from 'gpx';
     import {
         allowedEmbeddingBasemaps,
         getFilesFromEmbeddingOptions,
@@ -15,9 +14,7 @@
     } from './embedding';
     import { setMode } from 'mode-watcher';
     import { settings } from '$lib/logic/settings';
-    import { fileStateCollection } from '$lib/logic/file-state';
+    import { loadFiles } from '$lib/logic/file-actions';
-    import { loadFile } from '$lib/logic/file-actions';
-    import { selection } from '$lib/logic/selection';
     import { untrack } from 'svelte';
     import { isSelected, toggle } from '$lib/components/map/layer-control/utils';
     import { engine } from '$lib/engine';
@@ -30,6 +27,8 @@
         hash = $bindable(),
     }: { useHash?: boolean; options: EmbeddingOptions; hash: string } = $props();
 
+    const { files } = engine;
+
     let additionalDatasets = writable<string[]>([]);
     let elevationFill = writable<'slope' | 'surface' | 'highway' | undefined>(undefined);
 
@@ -74,26 +73,14 @@
         );
         elevationFill.set(options.elevation.fill == 'none' ? undefined : options.elevation.fill);
 
-        let downloads: Promise<GPXFile | null>[] = getFilesFromEmbeddingOptions(options).map(
+        let downloads: Promise<File>[] = getFilesFromEmbeddingOptions(options).map((url) => {
-            (url) => {
             return fetch(url)
                 .then((response) => response.blob())
-                    .then((blob) => new File([blob], url.split('/').pop() ?? url))
+                .then((blob) => new File([blob], url.split('/').pop() ?? url));
-                    .then(loadFile);
-            }
-        );
-        Promise.all(downloads).then((answers) => {
-            const files = answers.filter((file) => file !== null) as GPXFile[];
-            let ids: string[] = [];
-            files.forEach((file, index) => {
-                let id = `gpx-${index}-embed`;
-                file._data.id = id;
-                ids.push(id);
-            });
-            fileStateCollection.setEmbeddedFiles(files);
-            $fileOrder = ids;
-            selection.selectAll();
         });
+        Promise.all(downloads)
+            .then(loadFiles)
+            .then(() => engine.selectAll());
     }
 
     $effect(() => {
@@ -105,7 +92,7 @@
 <div class="absolute flex flex-col h-full w-full border rounded-xl overflow-clip">
     <div class="grow relative">
         <Map
-            class="h-full {$fileStateCollection.size > 1 ? 'horizontal' : ''}"
+            class="h-full {$files.size > 1 ? 'horizontal' : ''}"
             maptilerKey={options.key}
             geocoder={false}
             geolocate={true}
@@ -114,7 +101,7 @@
         <OpenIn files={options.files} ids={options.ids} />
         <LayerControl />
         <GPXLayers />
-        {#if $fileStateCollection.size > 1}
+        {#if $files.size > 1}
             <div class="h-10 -translate-y-10 w-full pointer-events-none absolute z-30">
                 <FileList orientation="horizontal" />
             </div>

website/src/lib/default-file-name.test.ts

@@ -0,0 +1,43 @@
+import { describe, it } from 'node:test';
+import assert from 'node:assert/strict';
+import { defaultFileName } from './default-file-name';
+
+describe('default file name', () => {
+    it('is the default name when there is no other file with it', () => {
+        assert.equal(defaultFileName('New file', []), 'New file');
+        assert.equal(defaultFileName('New file', ['Morning ride', 'track']), 'New file');
+    });
+
+    it('is numbered when other files have the default name', () => {
+        assert.equal(defaultFileName('New file', ['New file']), 'New file 2');
+        assert.equal(defaultFileName('New file', ['New file', 'New file 2']), 'New file 3');
+    });
+
+    it('goes after the highest number', () => {
+        assert.equal(defaultFileName('New file', ['New file 4', 'New file']), 'New file 5');
+        // a number that was freed is not used again
+        assert.equal(defaultFileName('New file', ['New file', 'New file 3']), 'New file 4');
+        // the numbered ones count even if the first one was renamed
+        assert.equal(defaultFileName('New file', ['New file 2']), 'New file 3');
+    });
+
+    it('ignores the names that only look like it', () => {
+        assert.equal(defaultFileName('New file', ['New file copy', 'New files 3']), 'New file');
+        assert.equal(
+            defaultFileName('New file', ['New file 2b', 'New file 0', 'New file -3']),
+            'New file'
+        );
+        assert.equal(defaultFileName('New file', ['New file ', 'New file  2']), 'New file');
+        assert.equal(defaultFileName('New file', ['my New file']), 'New file');
+    });
+
+    it('works with any language', () => {
+        assert.equal(defaultFileName('Nouveau fichier', ['Nouveau fichier']), 'Nouveau fichier 2');
+        assert.equal(defaultFileName('新文件', ['新文件', '新文件 2']), '新文件 3');
+        // the default name of another language is just a name
+        assert.equal(
+            defaultFileName('Nouveau fichier', ['New file', 'New file 2']),
+            'Nouveau fichier'
+        );
+    });
+});

website/src/lib/default-file-name.ts

@@ -0,0 +1,19 @@
+/**
+ * The name of a new file: the default name (translated), followed by a number when other files
+ * already have a default name (the name alone counts as number 1): "New file", "New file 2",
+ * "New file 3"...
+ */
+export function defaultFileName(defaultName: string, existingNames: string[]): string {
+    let highest = 0;
+    for (const name of existingNames) {
+        if (name === defaultName) {
+            highest = Math.max(highest, 1);
+        } else if (name.startsWith(`${defaultName} `)) {
+            const suffix = name.slice(defaultName.length + 1);
+            if (/^[1-9][0-9]*$/.test(suffix)) {
+                highest = Math.max(highest, parseInt(suffix));
+            }
+        }
+    }
+    return highest === 0 ? defaultName : `${defaultName} ${highest + 1}`;
+}

website/src/lib/engine.ts

@@ -242,9 +242,26 @@ class Engine {
         return this.run((w) => w.new_file(name));
     }
 
-    /** `name` is the name of the file when the data has none (the name on disk, without extension). */
+    /**
-    loadFile(data: Uint8Array, name: string) {
+     * Loads files as a single command (one undo step). `name` is the name of a file when its data
-        return this.run((w) => w.load_file(data, name));
+     * has none (the name on disk, without extension). The files that cannot be read are skipped,
+     * the first one that was read is selected.
+     */
+    loadFiles(files: { data: Uint8Array; name: string }[]) {
+        const lengths = Uint32Array.from(files.map((file) => file.data.length));
+        const data = new Uint8Array(lengths.reduce((sum, length) => sum + length, 0));
+        let offset = 0;
+        for (const file of files) {
+            data.set(file.data, offset);
+            offset += file.data.length;
+        }
+        return this.run((w) =>
+            w.load_files(
+                data,
+                lengths,
+                files.map((file) => file.name)
+            )
+        );
     }
 
     duplicate() {

website/src/lib/logic/file-actions.ts

@@ -10,15 +10,12 @@ import {
     ListTrackItem,
     ListTrackSegmentItem,
     ListWaypointItem,
-    ListWaypointsItem,
-    sortItems,
     type ListItem,
 } from '$lib/components/file-list/file-list';
 import { i18n } from '$lib/i18n.svelte';
-import { freeze, type WritableDraft } from 'immer';
+import { freeze } from 'immer';
 import {
     GPXFile,
-    parseGPX,
     Track,
     TrackPoint,
     TrackSegment,
@@ -32,6 +29,8 @@ import { settings } from '$lib/logic/settings';
 import { getClosestLinePoint, getClosestTrackSegments, getElevation } from '$lib/utils';
 import { gpxStatistics } from '$lib/logic/statistics';
 import { boundsManager } from './bounds';
+import { engine } from '$lib/engine';
+import { defaultFileName } from '$lib/default-file-name';
 
 // Generate unique file ids, different from the ones in the database
 export function getFileIds(n: number) {
@@ -45,31 +44,21 @@ export function getFileIds(n: number) {
     return ids;
 }
 
+/** The name of a new file: the translated default name, numbered if other files have it. */
+export function newFileName() {
+    const names = [...get(engine.files).values()].map((file) => get(file).structure.name);
+    return defaultFileName(i18n._('menu.new_file'), names);
+}
+
 export function newGPXFile() {
-    const newFileName = i18n._('menu.new_file');
-
     let file = new GPXFile();
-
+    file.metadata.name = newFileName();
-    let maxNewFileNumber = 0;
-    fileStateCollection.forEach((fileId, file) => {
-        if (file.metadata.name && file.metadata.name.startsWith(newFileName)) {
-            let number = parseInt(file.metadata.name.split(' ').pop() ?? '0');
-            if (!isNaN(number) && number > maxNewFileNumber) {
-                maxNewFileNumber = number;
-            }
-        }
-    });
-
-    file.metadata.name = `${newFileName} ${maxNewFileNumber + 1}`;
-
     return file;
 }
 
 export function createFile() {
-    let file = newGPXFile();
+    // the engine selects the new file
-
+    engine.newFile(newFileName());
-    fileActions.add(file);
-    selection.selectFileWhenLoaded(file._data.id);
     currentTool.set(Tool.ROUTING);
 }
 
@@ -87,41 +76,27 @@ export function triggerFileInput() {
     input.click();
 }
 
-export async function loadFiles(list: FileList | File[]) {
+/**
-    let files: GPXFile[] = [];
+ * Loads GPX files in the engine, as a single command: one undo step, the first file that could be
-    for (let i = 0; i < list.length; i++) {
+ * read is selected, and the map fits the files. A file without name is named like the file on
-        let file = await loadFile(list[i]);
+ * disk. Returns the ids of the files that were added.
-        if (file) {
+ */
-            files.push(file);
+export async function loadFiles(list: FileList | File[]): Promise<string[]> {
-        }
+    const files = await Promise.all(
-    }
+        Array.from(list).map(async (file) => ({
+            data: new Uint8Array(await file.arrayBuffer()),
+            name: file.name.split('.').slice(0, -1).join('.'),
+        }))
+    );
 
-    let ids = fileActions.addMultiple(files);
+    const before = new Set(get(engine.order));
-    selection.selectFileWhenLoaded(ids[0]);
+    await engine.loadFiles(files);
+
+    const ids = get(engine.order).filter((id) => !before.has(id));
+    if (ids.length > 0) {
         boundsManager.fitBoundsOnLoad(ids);
-}
-
-export async function loadFile(file: File): Promise<GPXFile | null> {
-    let result = await new Promise<GPXFile | null>((resolve) => {
-        const reader = new FileReader();
-        reader.onload = () => {
-            let data = reader.result?.toString() ?? null;
-            if (data) {
-                let gpx = parseGPX(data);
-                if (gpx.metadata === undefined) {
-                    gpx.metadata = {};
     }
-                if (gpx.metadata.name === undefined || gpx.metadata.name.trim() === '') {
+    return ids;
-                    gpx.metadata.name = file.name.split('.').slice(0, -1).join('.');
-                }
-                resolve(gpx);
-            } else {
-                resolve(null);
-            }
-        };
-        reader.readAsText(file);
-    });
-    return result;
 }
 
 // Helper functions for file operations
@@ -891,249 +866,3 @@ export const fileActions = {
         });
     },
 };
-
-export function pasteSelection() {
-    let fromItems = get(copied);
-    if (fromItems === undefined || fromItems.length === 0) {
-        return;
-    }
-
-    let selected = get(selection).getSelected();
-    if (selected.length === 0) {
-        selected = [new ListRootItem()];
-    }
-
-    let fromParent = fromItems[0].getParent();
-    let toParent = selected[selected.length - 1];
-
-    let startIndex: number | undefined = undefined;
-
-    if (fromItems[0].level === toParent.level) {
-        if (
-            toParent instanceof ListTrackItem ||
-            toParent instanceof ListTrackSegmentItem ||
-            toParent instanceof ListWaypointItem
-        ) {
-            startIndex = toParent.getId() + 1;
-        }
-        toParent = toParent.getParent();
-    }
-
-    let toItems: ListItem[] = [];
-    if (toParent.level === ListLevel.ROOT) {
-        let fileIds = getFileIds(fromItems.length);
-        fileIds.forEach((fileId) => {
-            toItems.push(new ListFileItem(fileId));
-        });
-    } else {
-        let toFile = fileStateCollection.getFile(toParent.getFileId());
-        if (toFile) {
-            fromItems.forEach((item, index) => {
-                if (toParent instanceof ListFileItem) {
-                    if (item instanceof ListTrackItem || item instanceof ListTrackSegmentItem) {
-                        toItems.push(
-                            new ListTrackItem(
-                                toParent.getFileId(),
-                                (startIndex ?? toFile.trk.length) + index
-                            )
-                        );
-                    } else if (item instanceof ListWaypointsItem) {
-                        toItems.push(new ListWaypointsItem(toParent.getFileId()));
-                    } else if (item instanceof ListWaypointItem) {
-                        toItems.push(
-                            new ListWaypointItem(
-                                toParent.getFileId(),
-                                (startIndex ?? toFile.wpt.length) + index
-                            )
-                        );
-                    }
-                } else if (toParent instanceof ListTrackItem) {
-                    if (item instanceof ListTrackSegmentItem) {
-                        let toTrackIndex = toParent.getTrackIndex();
-                        toItems.push(
-                            new ListTrackSegmentItem(
-                                toParent.getFileId(),
-                                toTrackIndex,
-                                (startIndex ?? toFile.trk[toTrackIndex].trkseg.length) + index
-                            )
-                        );
-                    }
-                } else if (toParent instanceof ListWaypointsItem) {
-                    if (item instanceof ListWaypointItem) {
-                        toItems.push(
-                            new ListWaypointItem(
-                                toParent.getFileId(),
-                                (startIndex ?? toFile.wpt.length) + index
-                            )
-                        );
-                    }
-                }
-            });
-        }
-    }
-
-    if (fromItems.length === toItems.length) {
-        moveItems(fromParent, toParent, fromItems, toItems, get(cut));
-        selection.resetCopied();
-    }
-}
-
-export function moveItems(
-    fromParent: ListItem,
-    toParent: ListItem,
-    fromItems: ListItem[],
-    toItems: ListItem[],
-    remove: boolean = true
-) {
-    if (fromItems.length === 0) {
-        return;
-    }
-
-    sortItems(fromItems, false);
-    sortItems(toItems, false);
-
-    let context: (GPXFile | Track | TrackSegment | Waypoint[] | Waypoint)[] = [];
-    fromItems.forEach((item) => {
-        let file = fileStateCollection.getFile(item.getFileId());
-        if (file) {
-            if (item instanceof ListFileItem) {
-                context.push(file.clone());
-            } else if (item instanceof ListTrackItem && item.getTrackIndex() < file.trk.length) {
-                context.push(file.trk[item.getTrackIndex()].clone());
-            } else if (
-                item instanceof ListTrackSegmentItem &&
-                item.getTrackIndex() < file.trk.length &&
-                item.getSegmentIndex() < file.trk[item.getTrackIndex()].trkseg.length
-            ) {
-                context.push(file.trk[item.getTrackIndex()].trkseg[item.getSegmentIndex()].clone());
-            } else if (item instanceof ListWaypointsItem) {
-                context.push(file.wpt.map((wpt) => wpt.clone()));
-            } else if (
-                item instanceof ListWaypointItem &&
-                item.getWaypointIndex() < file.wpt.length
-            ) {
-                context.push(file.wpt[item.getWaypointIndex()].clone());
-            }
-        }
-    });
-
-    if (remove && !(fromParent instanceof ListRootItem)) {
-        sortItems(fromItems, true);
-    }
-
-    let files = [fromParent.getFileId(), toParent.getFileId()];
-    let callbacks = [
-        (
-            file: WritableDraft<GPXFile>,
-            context: (GPXFile | Track | TrackSegment | Waypoint[] | Waypoint)[]
-        ) => {
-            fromItems.forEach((item) => {
-                if (item instanceof ListTrackItem) {
-                    file.replaceTracks(item.getTrackIndex(), item.getTrackIndex(), []);
-                } else if (item instanceof ListTrackSegmentItem) {
-                    file.replaceTrackSegments(
-                        item.getTrackIndex(),
-                        item.getSegmentIndex(),
-                        item.getSegmentIndex(),
-                        []
-                    );
-                } else if (item instanceof ListWaypointsItem) {
-                    file.replaceWaypoints(0, file.wpt.length - 1, []);
-                } else if (item instanceof ListWaypointItem) {
-                    file.replaceWaypoints(item.getWaypointIndex(), item.getWaypointIndex(), []);
-                }
-            });
-        },
-        (
-            file: WritableDraft<GPXFile>,
-            context: (GPXFile | Track | TrackSegment | Waypoint[] | Waypoint)[]
-        ) => {
-            toItems.forEach((item, i) => {
-                if (item instanceof ListTrackItem) {
-                    if (context[i] instanceof Track) {
-                        file.replaceTracks(item.getTrackIndex(), item.getTrackIndex() - 1, [
-                            context[i],
-                        ]);
-                    } else if (context[i] instanceof TrackSegment) {
-                        file.replaceTracks(item.getTrackIndex(), item.getTrackIndex() - 1, [
-                            new Track({
-                                trkseg: [context[i]],
-                            }),
-                        ]);
-                    }
-                } else if (
-                    item instanceof ListTrackSegmentItem &&
-                    context[i] instanceof TrackSegment
-                ) {
-                    file.replaceTrackSegments(
-                        item.getTrackIndex(),
-                        item.getSegmentIndex(),
-                        item.getSegmentIndex() - 1,
-                        [context[i]]
-                    );
-                } else if (item instanceof ListWaypointsItem) {
-                    if (
-                        Array.isArray(context[i]) &&
-                        context[i].length > 0 &&
-                        context[i][0] instanceof Waypoint
-                    ) {
-                        file.replaceWaypoints(file.wpt.length, file.wpt.length - 1, context[i]);
-                    } else if (context[i] instanceof Waypoint) {
-                        file.replaceWaypoints(file.wpt.length, file.wpt.length - 1, [context[i]]);
-                    }
-                } else if (item instanceof ListWaypointItem && context[i] instanceof Waypoint) {
-                    file.replaceWaypoints(item.getWaypointIndex(), item.getWaypointIndex() - 1, [
-                        context[i],
-                    ]);
-                }
-            });
-        },
-    ];
-
-    if (fromParent instanceof ListRootItem) {
-        files = [];
-        callbacks = [];
-    } else if (!remove) {
-        files.splice(0, 1);
-        callbacks.splice(0, 1);
-    }
-
-    fileActionManager.applyEachToFilesAndGlobal(
-        files,
-        callbacks,
-        (files, context: (GPXFile | Track | TrackSegment | Waypoint[] | Waypoint)[]) => {
-            toItems.forEach((item, i) => {
-                if (item instanceof ListFileItem) {
-                    if (context[i] instanceof GPXFile) {
-                        let newFile = context[i];
-                        if (remove) {
-                            files.delete(newFile._data.id);
-                        }
-                        newFile._data.id = item.getFileId();
-                        files.set(item.getFileId(), freeze(newFile));
-                    } else if (context[i] instanceof Track) {
-                        let newFile = newGPXFile();
-                        newFile._data.id = item.getFileId();
-                        if (context[i].name) {
-                            newFile.metadata.name = context[i].name;
-                        }
-                        newFile.replaceTracks(0, 0, [context[i]]);
-                        files.set(item.getFileId(), freeze(newFile));
-                    } else if (context[i] instanceof TrackSegment) {
-                        let newFile = newGPXFile();
-                        newFile._data.id = item.getFileId();
-                        newFile.replaceTracks(0, 0, [
-                            new Track({
-                                trkseg: [context[i]],
-                            }),
-                        ]);
-                        files.set(item.getFileId(), freeze(newFile));
-                    }
-                }
-            });
-        },
-        context
-    );
-
-    selection.set(toItems);
-}