Make internal drag and drop robust

build-plugin.sh

@@ -2,7 +2,7 @@
 set -eu
 
 PLUGIN="u-navigator"
-VERSION="0.2.7"
+VERSION="0.2.8"
 PKG_DIR="packages"
 WORK_DIR=".plugin-build"
 PKG_NAME="${PLUGIN}-${VERSION}.tgz"

plugin-root/usr/local/emhttp/plugins/u-navigator/api/common.php

@@ -122,6 +122,28 @@ function unav_copy_recursive(string $source, string $destination): void {
     }
 }
 
+function unav_delete_recursive(string $path): void {
+    if (is_link($path) || is_file($path)) {
+        if (!unlink($path)) {
+            unav_error(500, 'Could not remove source after move');
+        }
+        return;
+    }
+    if (is_dir($path)) {
+        foreach (scandir($path) ?: [] as $entry) {
+            if ($entry === '.' || $entry === '..') {
+                continue;
+            }
+            unav_delete_recursive($path . '/' . $entry);
+        }
+        if (!rmdir($path)) {
+            unav_error(500, 'Could not remove source directory after move');
+        }
+        return;
+    }
+    unav_error(400, 'Only files and directories can be moved');
+}
+
 function unav_guard_destination(string $source, string $destination): void {
     if (file_exists($destination)) {
         unav_error(409, 'Destination already exists');

plugin-root/usr/local/emhttp/plugins/u-navigator/api/job.php

@@ -24,7 +24,8 @@ unav_guard_destination($source['path'], $destination['path']);
 
 if ($action === 'move') {
     if (!rename($source['path'], $destination['path'])) {
-        unav_error(500, 'Move failed');
+        unav_copy_recursive($source['path'], $destination['path']);
+        unav_delete_recursive($source['path']);
     }
 } elseif ($action === 'copy') {
     unav_copy_recursive($source['path'], $destination['path']);

server/public/app.js

@@ -7,6 +7,7 @@ const state = {
   focusedId: null,
   selectedEntry: null,
   contextMenu: null,
+  draggedEntry: null,
   jobs: new Map(),
   nextWindowId: 1,
   zIndex: 20
@@ -196,11 +197,20 @@ function renderExplorer(body, win) {
   body.querySelector('[data-action="up"]').addEventListener('click', () => loadExplorer(win, parentPath(data.path)));
 
   const dropZone = body.querySelector('.drop-zone');
+  dropZone.addEventListener('dragenter', (event) => {
+    if (hasDropPayload(event)) {
+      event.preventDefault();
+      data.dragOver = true;
+      dropZone.classList.add('drag-over');
+    }
+  });
   dropZone.addEventListener('dragover', (event) => {
+    if (hasDropPayload(event)) {
       event.preventDefault();
       event.dataTransfer.dropEffect = event.altKey ? 'copy' : 'move';
       data.dragOver = true;
       dropZone.classList.add('drag-over');
+    }
   });
   dropZone.addEventListener('dragleave', () => {
     data.dragOver = false;
@@ -210,7 +220,11 @@ function renderExplorer(body, win) {
     event.preventDefault();
     data.dragOver = false;
     dropZone.classList.remove('drag-over');
+    try {
       await handleDrop(event, win, data.path);
+    } catch (error) {
+      showError(error);
+    }
   });
   dropZone.addEventListener('contextmenu', (event) => {
     event.preventDefault();
@@ -227,6 +241,7 @@ function renderExplorer(body, win) {
       }
     });
     row.addEventListener('dragstart', (event) => {
+      state.draggedEntry = { path: entry.path, name: entry.name, sourceWindowId: win.id };
       event.dataTransfer.setData('application/x-u-navigator-path', entry.path);
       event.dataTransfer.setData('text/plain', entry.path);
       event.dataTransfer.effectAllowed = 'copyMove';
@@ -234,6 +249,9 @@ function renderExplorer(body, win) {
     });
     row.addEventListener('dragend', () => {
       row.classList.remove('dragging');
+      setTimeout(() => {
+        state.draggedEntry = null;
+      }, 0);
     });
     row.addEventListener('dragover', (event) => {
       if (entry.type === 'directory') {
@@ -246,7 +264,11 @@ function renderExplorer(body, win) {
       if (entry.type !== 'directory') return;
       event.preventDefault();
       event.stopPropagation();
+      try {
         await handleDrop(event, win, entry.path);
+      } catch (error) {
+        showError(error);
+      }
     });
     row.addEventListener('contextmenu', (event) => {
       event.preventDefault();
@@ -337,12 +359,15 @@ async function handleDrop(event, win, targetPath) {
     return;
   }
 
-  const internalPath = event.dataTransfer.getData('application/x-u-navigator-path') || event.dataTransfer.getData('text/plain');
+  const internalPath = event.dataTransfer.getData('application/x-u-navigator-path') || event.dataTransfer.getData('text/plain') || state.draggedEntry?.path;
   if (internalPath) {
     const name = internalPath.split('/').filter(Boolean).at(-1);
     const destination = `${targetPath.replace(/\/$/, '')}/${name}`;
+    if (internalPath === destination) {
+      throw new Error('Quelle und Ziel sind identisch.');
+    }
     await createJob(event.altKey ? 'copy' : 'move', internalPath, destination);
-    await loadExplorer(win, win.data.path);
+    await reloadExplorerWindows([win.id, state.draggedEntry?.sourceWindowId].filter(Boolean));
     return;
   }
 
@@ -370,6 +395,21 @@ async function createJob(type, source, destination) {
   render();
 }
 
+async function reloadExplorerWindows(ids) {
+  const uniqueIds = new Set(ids);
+  const targets = state.windows.filter((win) => win.kind === 'explorer' && (uniqueIds.has(win.id) || !uniqueIds.size));
+  await Promise.all(targets.map((win) => loadExplorer(win, win.data.path)));
+}
+
+function hasDropPayload(event) {
+  return Boolean(state.draggedEntry || event.dataTransfer?.types?.includes('Files') || event.dataTransfer?.types?.includes('application/x-u-navigator-path') || event.dataTransfer?.types?.includes('text/plain'));
+}
+
+function showError(error) {
+  const message = error?.message || String(error);
+  alert(message);
+}
+
 async function renameEntry(win, entry) {
   const nextName = prompt('Neuer Name', entry.name);
   if (!nextName || nextName === entry.name) {

server/public/styles.css

@@ -191,8 +191,10 @@
 }
 
 .u-nav .drop-zone.drag-over {
-  background: color-mix(in srgb, var(--accent) 10%, transparent);
+  background: color-mix(in srgb, var(--accent) 18%, transparent);
   border-color: var(--accent);
+  border-style: solid;
+  box-shadow: inset 0 0 0 2px var(--accent);
 }
 
 .u-nav .file-table {

u-navigator.plg

@@ -1,7 +1,7 @@
 <!DOCTYPE PLUGIN [
 <!ENTITY name "u-navigator">
 <!ENTITY author "michael">
-<!ENTITY version "0.2.7">
+<!ENTITY version "0.2.8">
 <!ENTITY package "&name;-&version;.tgz">
 ]>
 <PLUGIN name="&name;" author="&author;" version="&version;" pluginURL="https://git.casaderoll.de/michael/Unraid-Navigator/raw/branch/main/u-navigator.plg">
@@ -14,7 +14,7 @@
 
 <FILE Name="/boot/config/plugins/&name;/&package;">
 <URL>https://git.casaderoll.de/michael/Unraid-Navigator/raw/branch/main/packages/&package;</URL>
-<MD5>c22b248a40a369a93ef58126e72fe823</MD5>
+<MD5>5e77298b9383a80c1ca8c27020b1d8b0</MD5>
 </FILE>
 
 <FILE Run="/bin/bash">