vis: add `:set escdelay nn` option

Make the delay used to distinguish between an <Escape> key and
other terminal escape sequences such as for the Meta key run
time configurable. The value is given in miliseconds and defaults
to 50ms.

Notice that terminal multiplexers like dvtm or tmux might also
induce some delay which has to be configured independently.

1 files changed, 6 insertions, 0 deletions

diff --git a/sam.c b/sam.c
index 1f2e061..93c41c2 100644
--- a/sam.c
+++ b/sam.c
@@ -281,6 +281,7 @@ typedef struct {
 
 enum {
 	OPTION_SHELL,
+	OPTION_ESCDELAY,
 	OPTION_AUTOINDENT,
 	OPTION_EXPANDTAB,
 	OPTION_TABWIDTH,
@@ -302,6 +303,11 @@ static const OptionDef options[] = {
 		OPTION_TYPE_STRING, OPTION_FLAG_NONE,
 		"Shell to use for external commands (default: $SHELL, /etc/passwd, /bin/sh)",
 	},
+	[OPTION_ESCDELAY] = {
+		{ "escdelay" },
+		OPTION_TYPE_NUMBER, OPTION_FLAG_NONE,
+		"Miliseconds to wait to distinguish <Escape> from terminal escape sequences",
+	},
 	[OPTION_AUTOINDENT] = {
 		{ "autoindent", "ai" },
 		OPTION_TYPE_BOOL, OPTION_FLAG_NONE,