feat: use $EDITOR to edit files (#496)

Fixes #489

lib/view/page/setting/entry.dart

@@ -691,6 +691,7 @@ class _SettingPageState extends State<SettingPage> {
   Widget _buildSFTP() {
     return Column(
       children: [
+        _buildSftpEditor(),
         _buildSftpRmrDir(),
         _buildSftpOpenLastPath(),
         _buildSftpShowFoldersFirst(),
@@ -1237,4 +1238,40 @@ class _SettingPageState extends State<SettingPage> {
       trailing: StoreSwitch(prop: _setting.letterCache),
     );
   }
+
+  Widget _buildSftpEditor() {
+    return _setting.sftpEditor.listenable().listenVal(
+      (val) {
+        return ListTile(
+          leading: const Icon(MingCute.edit_fill),
+          title: TipText(text: l10n.editor, tip: l10n.sftpEditorTip),
+          trailing: Text(
+            val.isEmpty ? l10n.inner : val,
+            style: UIs.text15,
+          ),
+          onTap: () async {
+            final ctrl = TextEditingController(text: val);
+            void onSave(String s) {
+              _setting.sftpEditor.put(s);
+              context.pop();
+            }
+
+            await context.showRoundDialog<bool>(
+              title: l10n.choose,
+              child: Input(
+                controller: ctrl,
+                autoFocus: true,
+                label: l10n.editor,
+                hint: '\$EDITOR / vim / nano ...',
+                icon: Icons.edit,
+                suggestion: false,
+                onSubmitted: onSave,
+              ),
+              actions: Btns.oks(onTap: () => onSave(ctrl.text)),
+            );
+          },
+        );
+      },
+    );
+  }
 }

lib/view/page/storage/sftp.dart

@@ -445,6 +445,18 @@ class _SftpPageState extends State<SftpPage> with AfterLayoutMixin {
   }
 
   Future<void> _edit(SftpName name) async {
+    context.pop();
+
+    // #489
+    final editor = Stores.setting.sftpEditor.fetch();
+    if (editor.isNotEmpty) {
+      // Use single quote to avoid escape
+      final cmd = "$editor '${_getRemotePath(name)}'";
+      await AppRoutes.ssh(spi: widget.spi, initCmd: cmd).go(context);
+      await _listDir();
+      return;
+    }
+
     final size = name.attr.size;
     if (size == null || size > Miscs.editorMaxSize) {
       context.showSnackBar(l10n.fileTooLarge(
@@ -454,7 +466,6 @@ class _SftpPageState extends State<SftpPage> with AfterLayoutMixin {
       ));
       return;
     }
-    context.pop();
 
     final remotePath = _getRemotePath(name);
     final localPath = await _getLocalPath(remotePath);