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, 12 insertions, 12 deletions

diff --git a/usr.bin/tmux/cmd-list-windows.c b/usr.bin/tmux/cmd-list-windows.c
index 2882b2b742e..f1b6e6eb980 100644
--- a/usr.bin/tmux/cmd-list-windows.c
+++ b/usr.bin/tmux/cmd-list-windows.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-list-windows.c,v 1.25 2012/10/25 11:26:47 nicm Exp $ */
+/* $OpenBSD: cmd-list-windows.c,v 1.26 2013/03/24 09:54:10 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -27,11 +27,11 @@
  * List windows on given session.
  */
 
-enum cmd_retval	 cmd_list_windows_exec(struct cmd *, struct cmd_ctx *);
+enum cmd_retval	 cmd_list_windows_exec(struct cmd *, struct cmd_q *);
 
-void	cmd_list_windows_server(struct cmd *, struct cmd_ctx *);
+void	cmd_list_windows_server(struct cmd *, struct cmd_q *);
 void	cmd_list_windows_session(
-	    struct cmd *, struct session *, struct cmd_ctx *, int);
+	    struct cmd *, struct session *, struct cmd_q *, int);
 
 const struct cmd_entry cmd_list_windows_entry = {
 	"list-windows", "lsw",
@@ -44,35 +44,35 @@ const struct cmd_entry cmd_list_windows_entry = {
 };
 
 enum cmd_retval
-cmd_list_windows_exec(struct cmd *self, struct cmd_ctx *ctx)
+cmd_list_windows_exec(struct cmd *self, struct cmd_q *cmdq)
 {
 	struct args	*args = self->args;
 	struct session	*s;
 
 	if (args_has(args, 'a'))
-		cmd_list_windows_server(self, ctx);
+		cmd_list_windows_server(self, cmdq);
 	else {
-		s = cmd_find_session(ctx, args_get(args, 't'), 0);
+		s = cmd_find_session(cmdq, args_get(args, 't'), 0);
 		if (s == NULL)
 			return (CMD_RETURN_ERROR);
-		cmd_list_windows_session(self, s, ctx, 0);
+		cmd_list_windows_session(self, s, cmdq, 0);
 	}
 
 	return (CMD_RETURN_NORMAL);
 }
 
 void
-cmd_list_windows_server(struct cmd *self, struct cmd_ctx *ctx)
+cmd_list_windows_server(struct cmd *self, struct cmd_q *cmdq)
 {
 	struct session	*s;
 
 	RB_FOREACH(s, sessions, &sessions)
-		cmd_list_windows_session(self, s, ctx, 1);
+		cmd_list_windows_session(self, s, cmdq, 1);
 }
 
 void
 cmd_list_windows_session(
-    struct cmd *self, struct session *s, struct cmd_ctx *ctx, int type)
+    struct cmd *self, struct session *s, struct cmd_q *cmdq, int type)
 {
 	struct args		*args = self->args;
 	struct winlink		*wl;
@@ -102,7 +102,7 @@ cmd_list_windows_session(
 		format_window_pane(ft, wl->window->active);
 
 		line = format_expand(ft, template);
-		ctx->print(ctx, "%s", line);
+		cmdq_print(cmdq, "%s", line);
 		free(line);
 
 		format_free(ft);