opt.: add tip (#380 #382)

lib/data/model/server/snippet.dart

@@ -115,10 +115,10 @@ class Snippet implements TagPickable {
       final key = argsFmted.substring(start, end).toLowerCase();
 
       // Special funcs
-      final special = _find(specialCtrl, key);
+      final special = _find(SnippetFuncs.specialCtrl, key);
       if (special != null) {
         final raw = key.substring(special.key.length + 1, key.length - 1);
-        await special.value(raw);
+        await special.value((term: terminal, raw: raw));
       }
 
       // Term keys
@@ -152,15 +152,17 @@ class Snippet implements TagPickable {
 
     // `${ctrl+ad}` -> `ctrla + d`
     final chars = key.substring(termKey.key.length + 1, key.length - 1);
-    terminal.charInput(
+    if (chars.isEmpty) return;
+    final ok = terminal.charInput(
       chars.codeUnitAt(0),
       ctrl: ctrlAlt.ctrl,
       alt: ctrlAlt.alt,
     );
-    
-    for (final char in chars.codeUnits.skip(1)) {
-      terminal.charInput(char, ctrl: false, alt: false);
+    if (!ok) {
+      Loggers.app.warning('Failed to input: $key');
     }
+
+    terminal.textInput(chars.substring(1));
   }
 
   MapEntry<String, T>? _find<T>(Map<String, T> map, String key) {
@@ -180,12 +182,6 @@ class Snippet implements TagPickable {
   static final fmtTermKeys = {
     r'${ctrl': TerminalKey.control,
     r'${alt': TerminalKey.alt,
-    r'${enter': TerminalKey.enter,
-  };
-
-  static final specialCtrl = {
-    // `${sleep 3}` -> sleep 3 seconds
-    r'${sleep': SnippetFuncs.sleep,
   };
 }
 
@@ -201,11 +197,31 @@ class SnippetResult {
   });
 }
 
+typedef SnippetFuncCtx = ({Terminal term, String raw});
+
 abstract final class SnippetFuncs {
-  static FutureOr<void> sleep(String raw) async {
-    final seconds = int.tryParse(raw);
+  static final specialCtrl = {
+    // `${sleep 3}` -> sleep 3 seconds
+    r'${sleep': SnippetFuncs.sleep,
+    r'${enter': SnippetFuncs.enter,
+  };
+
+  static const help = {
+    'sleep': 'Sleep for a few seconds',
+    'enter': 'Enter a few times',
+  };
+
+  static FutureOr<void> sleep(SnippetFuncCtx ctx) async {
+    final seconds = int.tryParse(ctx.raw);
     if (seconds == null) return;
     final duration = Duration(seconds: seconds);
     await Future.delayed(duration);
   }
+
+  static FutureOr<void> enter(SnippetFuncCtx ctx) async {
+    final times = int.tryParse(ctx.raw) ?? 1;
+    for (var i = 0; i < times; i++) {
+      ctx.term.keyInput(TerminalKey.enter);
+    }
+  }
 }

lib/l10n/app_de.arb

@@ -112,6 +112,7 @@
   "followSystem": "System verfolgen",
   "font": "Schriftarten",
   "fontSize": "Schriftgröße",
+  "forExample": "Zum Beispiel",
   "force": "freiwillig",
   "foundNUpdate": "Update {count} gefunden",
   "fullScreen": "Vollbildmodus",

lib/l10n/app_en.arb

@@ -112,6 +112,7 @@
   "followSystem": "Follow system",
   "font": "Font",
   "fontSize": "Font size",
+  "forExample": "For example",
   "force": "Force",
   "foundNUpdate": "Found {count} update",
   "fullScreen": "Full screen mode",

lib/l10n/app_es.arb

@@ -112,6 +112,7 @@
   "followSystem": "Seguir al sistema",
   "font": "Fuente",
   "fontSize": "Tamaño de fuente",
+  "forExample": "Por ejemplo",
   "force": "Forzar",
   "foundNUpdate": "Encontradas {count} actualizaciones",
   "fullScreen": "Modo pantalla completa",

lib/l10n/app_fr.arb

@@ -112,6 +112,7 @@
   "followSystem": "Suivre le système",
   "font": "Police",
   "fontSize": "Taille de la police",
+  "forExample": "Par exemple",
   "force": "Forcer",
   "foundNUpdate": "{count} mise à jour trouvée",
   "fullScreen": "Mode plein écran",

lib/l10n/app_id.arb

@@ -112,6 +112,7 @@
   "followSystem": "Ikuti sistem",
   "font": "Font",
   "fontSize": "Ukuran huruf",
+  "forExample": "Sebagai contoh",
   "force": "sukarela",
   "foundNUpdate": "Menemukan {count} pembaruan",
   "fullScreen": "Mode Layar Penuh",

lib/l10n/app_ja.arb

@@ -112,6 +112,7 @@
   "followSystem": "システムに従う",
   "font": "フォント",
   "fontSize": "フォントサイズ",
+  "forExample": "例えば",
   "force": "強制",
   "foundNUpdate": "{count}個の更新が見つかりました",
   "fullScreen": "フルスクリーンモード",

lib/l10n/app_nl.arb

@@ -112,6 +112,7 @@
   "followSystem": "Volg systeem",
   "font": "Lettertype",
   "fontSize": "Lettergrootte",
+  "forExample": "Bijvoorbeeld",
   "force": "Forceer",
   "foundNUpdate": "{count} update gevonden",
   "fullScreen": "Volledig schermmodus",

lib/l10n/app_pt.arb

@@ -112,6 +112,7 @@
   "followSystem": "Seguir sistema",
   "font": "Fonte",
   "fontSize": "Tamanho da fonte",
+  "forExample": "Por exemplo",
   "force": "Forçar",
   "foundNUpdate": "Encontradas {count} atualizações",
   "fullScreen": "Modo tela cheia",

lib/l10n/app_ru.arb

@@ -112,6 +112,7 @@
   "followSystem": "следовать за системой",
   "font": "шрифт",
   "fontSize": "размер шрифта",
+  "forExample": "Например",
   "force": "принудительно",
   "foundNUpdate": "Найдено {count} обновлений",
   "fullScreen": "полноэкранный режим",

lib/l10n/app_zh.arb

@@ -112,6 +112,7 @@
   "followSystem": "跟随系统",
   "font": "字体",
   "fontSize": "字体大小",
+  "forExample": "例如",
   "force": "强制",
   "foundNUpdate": "找到 {count} 个更新",
   "fullScreen": "全屏模式",

lib/l10n/app_zh_tw.arb

@@ -112,6 +112,7 @@
   "followSystem": "跟隨系統",
   "font": "字體",
   "fontSize": "字體大小",
+  "forExample": "例如",
   "force": "強制",
   "foundNUpdate": "找到 {count} 個更新",
   "fullScreen": "全屏模式",

lib/view/page/snippet/edit.dart

@@ -200,9 +200,13 @@ class _SnippetEditPageState extends State<SnippetEditPage>
         padding: const EdgeInsets.all(13),
         child: SimpleMarkdown(
           data: '''
-📌 ${l10n.supportFmtArgs}
+📌 ${l10n.supportFmtArgs}\n
+${Snippet.fmtArgs.keys.map((e) => '`$e`').join(', ')}\n
 
-${Snippet.fmtArgs.keys.map((e) => '`$e`').join(', ')}
+${Snippet.fmtTermKeys.keys.map((e) => '`$e+?}`').join(', ')}\n
+${l10n.forExample}: 
+- `\${ctrl+c}` (Control + C)
+- `\${ctrl+b}d` (Tmux Detach)
 ''',
           styleSheet: MarkdownStyleSheet(
             codeblockDecoration: const BoxDecoration(