core: add default key alt-enter to insert a newline (issue #1498)

ChangeLog.adoc

@@ -20,6 +20,7 @@ https://weechat.org/files/releasenotes/ReleaseNotes-devel.html[release notes]
 
 New features::
 
+  * core: add default key kbd:[Alt+Enter] to insert a newline (issue #1498)
   * core: add flag "input_multiline" in buffer (issue #984, issue #1063)
   * core: add a scalable WeeChat logo (SVG) (issue #1454, issue #1456)
   * core: add case sensitive wildcard matching comparison operator (`+==*+` and `+!!*+`) and case sensitive/insensitive include comparison operators (`+==-+`,  `+!!-+`, `+=-+`, `+!-+`) in evaluation of expressions

doc/de/weechat_user.de.adoc

@@ -1664,6 +1664,8 @@ und um eine Hilfe zu erhalten wie man es nutzt: `+/help buffer_autoset+`.
 | kbd:[Enter] +
   kbd:[Ctrl+j] +
   kbd:[Ctrl+m]    | führt einen Befehl aus oder sendet den Text  (im Such-Modus: stoppt Suche). | `+/input return+`
+// TRANSLATION MISSING
+| kbd:[Alt+Enter] | Insert a newline. | `+/input insert \n+`
 | kbd:[↑]         | ruft vorherigen Befehl oder Nachricht aus dem Verlaufsspeicher auf (im Such-Modus: rückwärts suchen). | `+/input history_previous+`
 | kbd:[↓]         | ruft nächsten Befehl oder Nachricht aus dem Verlaufsspeicher auf (im Such-Modus: vorwärts suchen). | `+/input history_next+`
 | kbd:[Ctrl+↑]    | ruft vorherigen Befehl/Nachricht aus dem globalen Verlaufsspeicher auf (für alle Buffer). | `+/input history_global_previous+`

doc/en/weechat_user.en.adoc

@@ -1631,12 +1631,13 @@ with `+/script install buffer_autoset.py+` and get help with
 | kbd:[Enter] +
   kbd:[Ctrl+j] +
   kbd:[Ctrl+m]    | Execute command or send message (in search mode: stop search). | `+/input return+`
+| kbd:[Alt+Enter] | Insert a newline. | `+/input insert \n+`
 | kbd:[↑]         | Call previous command/message (in search mode: search up). | `+/input history_previous+`
 | kbd:[↓]         | Call next command/message (in search mode: search down). | `+/input history_next+`
 | kbd:[Ctrl+↑]    | Call previous command/message in global history (common for all buffers). | `+/input history_global_previous+`
 | kbd:[Ctrl+↓]    | Call next command/message in global history (common for all buffers). | `+/input history_global_next+`
 | kbd:[Alt+d]     | Delete next word in command line (deleted string is copied to the internal clipboard). | `+/input delete_next_word+`
-| kbd:[Alt+k]     |  Grab a key and insert its code (and command bound if key exists) in command line. | `+/input grab_key_command+`
+| kbd:[Alt+k]     | Grab a key and insert its code (and command bound if key exists) in command line. | `+/input grab_key_command+`
 | kbd:[Alt+r]     | Delete entire command line. | `+/input delete_line+`
 | kbd:[Alt+s]     | Toggle spell checker. | `+/mute spell toggle+`
 |===

doc/fr/weechat_user.fr.adoc

@@ -1685,6 +1685,7 @@ avec `+/help buffer_autoset+`.
 | kbd:[Enter] +
   kbd:[Ctrl+j] +
   kbd:[Ctrl+m]    | Exécuter la commande ou envoyer le message (en mode recherche : arrêter la recherche). | `+/input return+`
+| kbd:[Alt+Enter] | Insérer une nouvelle ligne. | `+/input insert \n+`
 | kbd:[↑]         | Rappeler la commande précédente (en mode recherche : chercher plus haut). | `+/input history_previous+`
 | kbd:[↓]         | Rappeler la commande suivante (en mode recherche : chercher plus bas). | `+/input history_next+`
 | kbd:[Ctrl+↑]    | Rappeler la commande précédente dans l'historique global (commun à tous les tampons). | `+/input history_global_previous+`

doc/it/weechat_user.it.adoc

@@ -1726,6 +1726,8 @@ with `+/script install buffer_autoset.py+` and get help with `+/help buffer_auto
 | kbd:[Invio] +
   kbd:[Ctrl+j] +
   kbd:[Ctrl+m]    | Esegue comando o invia messaggio (in modalità ricerca: ferma ricerca). | `+/input return+`
+// TRANSLATION MISSING
+| kbd:[Alt+Enter] | Insert a newline. | `+/input insert \n+`
 | kbd:[↑]         | Chiama comando/messaggio precedente (in modalità ricerca: cerca in alto). | `+/input history_previous+`
 | kbd:[↓]         | Chiama comando/messaggio precedente (in modalità ricerca: cerca in basso). | `+/input history_next+`
 | kbd:[Ctrl+↑]    | Chiama il comando/messaggio precedente nella cronologia globale (identico per tutti i buffer). | `+/input history_global_previous+`

doc/ja/weechat_user.ja.adoc

@@ -1641,6 +1641,8 @@ irc サーバ "freenode" に含まれる全てのバッファに対して設定
 | kbd:[Enter] +
   kbd:[Ctrl+j] +
   kbd:[Ctrl+m]    | コマンドを実行するか、メッセージを送信する (検索モードの場合: 検索の終了) | `+/input return+`
+// TRANSLATION MISSING
+| kbd:[Alt+Enter] | Insert a newline. | `+/input insert \n+`
 | kbd:[↑]         | 前のコマンド/メッセージを呼び出す (検索モードの場合: 上方向に検索) | `+/input history_previous+`
 | kbd:[↓]         | 次のコマンド/メッセージを呼び出す (検索モードの場合: 下方向に検索) | `+/input history_next+`
 | kbd:[Ctrl+↑]    | グローバル履歴から前のコマンド/メッセージを呼び出す (すべてのバッファに対して共通の履歴) | `+/input history_global_previous+`

doc/pl/weechat_user.pl.adoc

@@ -1640,6 +1640,8 @@ Można ją zapisać za pomocą skryptu _buffer_autoset.py_: można go zaintalowa
 | kbd:[Enter] +
   kbd:[Ctrl+j] +
   kbd:[Ctrl+m]    | Wykonaj komendę lub wyślij wiadomość (w trybie wyszukiwania: przerwij wyszukiwanie). | `+/input return+`
+// TRANSLATION MISSING
+| kbd:[Alt+Enter] | Insert a newline. | `+/input insert \n+`
 | kbd:[↑]         | Pokaż poprzednią komendę/wiadomość (w trybie wyszukiwania: szukaj w górę). | `+/input history_previous+`
 | kbd:[↓]         | Pokaż następną komendę/wiadomość (w trybie wyszukiwania: szukaj w dół). | `+/input history_next+`
 | kbd:[Ctrl+↑]    | Pokaż poprzednią komendę/wiadomość w historii globalnej (wspólnej dla wszystkich buforów). | `+/input history_global_previous+`

src/gui/curses/gui-curses-key.c

@@ -83,6 +83,7 @@ gui_key_default_bindings (int context)
     {
         BIND(/* <enter>       */ "ctrl-M",             "/input return");
         BIND(/* <enter>       */ "ctrl-J",             "/input return");
+        BIND(/* m-<enter>     */ "meta-ctrl-M",        "/input insert \\n");
         BIND(/* <tab>         */ "ctrl-I",             "/input complete_next");
         BIND(/* s-<tab>       */ "meta2-Z",            "/input complete_previous");
         BIND(/* ^R            */ "ctrl-R",             "/input search_text_here");