Add a command queue to standardize and simplify commands that call other

commands and allow a command to block execution of subsequent
commands. This allows run-shell and if-shell to be synchronous which has
been much requested.

Each client has a default command queue and commands are consumed one at
a time from it. A command may suspend execution from the queue by
returning CMD_RETURN_WAIT and then resume it by calling cmd_continue() -
for example run-shell does this from the callback that is fired after
the job is freed.

When the command queue becomes empty, command clients are automatically
exited (unless attaching). A callback is also fired - this is used for
nested commands in, for example, if-shell which can block execution of
the client's cmdq until a new cmdq becomes empty.

Also merge all the old error/info/print functions together and lose the
old curclient/cmdclient distinction - a cmdq is bound to one client (or
none if in the configuration file), this is a command client if
c->session is NULL otherwise an attached client.

1 files changed, 9 insertions, 9 deletions

diff --git a/usr.bin/tmux/cmd-display-message.c b/usr.bin/tmux/cmd-display-message.c
index 30b3f42c2a6..f326a5c98cb 100644
--- a/usr.bin/tmux/cmd-display-message.c
+++ b/usr.bin/tmux/cmd-display-message.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-display-message.c,v 1.19 2013/03/24 09:27:19 nicm Exp $ */
+/* $OpenBSD: cmd-display-message.c,v 1.20 2013/03/24 09:54:10 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
@@ -27,7 +27,7 @@
  * Displays a message in the status line.
  */
 
-enum cmd_retval	 cmd_display_message_exec(struct cmd *, struct cmd_ctx *);
+enum cmd_retval	 cmd_display_message_exec(struct cmd *, struct cmd_q *);
 
 const struct cmd_entry cmd_display_message_entry = {
 	"display-message", "display",
@@ -41,7 +41,7 @@ const struct cmd_entry cmd_display_message_entry = {
 };
 
 enum cmd_retval
-cmd_display_message_exec(struct cmd *self, struct cmd_ctx *ctx)
+cmd_display_message_exec(struct cmd *self, struct cmd_q *cmdq)
 {
 	struct args		*args = self->args;
 	struct client		*c;
@@ -56,17 +56,17 @@ cmd_display_message_exec(struct cmd *self, struct cmd_ctx *ctx)
 	size_t			 len;
 
 	if (args_has(args, 't')) {
-		wl = cmd_find_pane(ctx, args_get(args, 't'), &s, &wp);
+		wl = cmd_find_pane(cmdq, args_get(args, 't'), &s, &wp);
 		if (wl == NULL)
 			return (CMD_RETURN_ERROR);
 	} else {
-		wl = cmd_find_pane(ctx, NULL, &s, &wp);
+		wl = cmd_find_pane(cmdq, NULL, &s, &wp);
 		if (wl == NULL)
 			return (CMD_RETURN_ERROR);
 	}
 
 	if (args_has(args, 'F') && args->argc != 0) {
-		ctx->error(ctx, "only one of -F or argument must be given");
+		cmdq_error(cmdq, "only one of -F or argument must be given");
 		return (CMD_RETURN_ERROR);
 	}
 
@@ -77,7 +77,7 @@ cmd_display_message_exec(struct cmd *self, struct cmd_ctx *ctx)
 		template = DISPLAY_MESSAGE_TEMPLATE;
 
 	ft = format_create();
-	if ((c = cmd_find_client(ctx, args_get(args, 'c'), 1)) != NULL)
+	if ((c = cmd_find_client(cmdq, args_get(args, 'c'), 1)) != NULL)
 		format_client(ft, c);
 	format_session(ft, s);
 	format_winlink(ft, s, wl);
@@ -89,11 +89,11 @@ cmd_display_message_exec(struct cmd *self, struct cmd_ctx *ctx)
 
 	msg = format_expand(ft, out);
 	if (args_has(self->args, 'p'))
-		ctx->print(ctx, "%s", msg);
+		cmdq_print(cmdq, "%s", msg);
 	else
 		status_message_set(c, "%s", msg);
-
 	free(msg);
 	format_free(ft);
+
 	return (CMD_RETURN_NORMAL);
 }