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-list-keys.c b/usr.bin/tmux/cmd-list-keys.c
index 9a2b27963d9..47e7a641107 100644
--- a/usr.bin/tmux/cmd-list-keys.c
+++ b/usr.bin/tmux/cmd-list-keys.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-list-keys.c,v 1.20 2013/03/22 15:52:40 nicm Exp $ */
+/* $OpenBSD: cmd-list-keys.c,v 1.21 2013/03/24 09:54:10 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -26,8 +26,8 @@
  * List key bindings.
  */
 
-enum cmd_retval	 cmd_list_keys_exec(struct cmd *, struct cmd_ctx *);
-enum cmd_retval	 cmd_list_keys_table(struct cmd *, struct cmd_ctx *);
+enum cmd_retval	 cmd_list_keys_exec(struct cmd *, struct cmd_q *);
+enum cmd_retval	 cmd_list_keys_table(struct cmd *, struct cmd_q *);
 
 const struct cmd_entry cmd_list_keys_entry = {
 	"list-keys", "lsk",
@@ -40,7 +40,7 @@ const struct cmd_entry cmd_list_keys_entry = {
 };
 
 enum cmd_retval
-cmd_list_keys_exec(struct cmd *self, struct cmd_ctx *ctx)
+cmd_list_keys_exec(struct cmd *self, struct cmd_q *cmdq)
 {
 	struct args		*args = self->args;
 	struct key_binding	*bd;
@@ -50,7 +50,7 @@ cmd_list_keys_exec(struct cmd *self, struct cmd_ctx *ctx)
 	int			 width, keywidth;
 
 	if (args_has(args, 't'))
-		return (cmd_list_keys_table(self, ctx));
+		return (cmd_list_keys_table(self, cmdq));
 
 	width = 0;
 
@@ -91,14 +91,14 @@ cmd_list_keys_exec(struct cmd *self, struct cmd_ctx *ctx)
 			continue;
 
 		cmd_list_print(bd->cmdlist, tmp + used, (sizeof tmp) - used);
-		ctx->print(ctx, "bind-key %s", tmp);
+		cmdq_print(cmdq, "bind-key %s", tmp);
 	}
 
 	return (CMD_RETURN_NORMAL);
 }
 
 enum cmd_retval
-cmd_list_keys_table(struct cmd *self, struct cmd_ctx *ctx)
+cmd_list_keys_table(struct cmd *self, struct cmd_q *cmdq)
 {
 	struct args			*args = self->args;
 	const char			*tablename;
@@ -109,7 +109,7 @@ cmd_list_keys_table(struct cmd *self, struct cmd_ctx *ctx)
 
 	tablename = args_get(args, 't');
 	if ((mtab = mode_key_findtable(tablename)) == NULL) {
-		ctx->error(ctx, "unknown key table: %s", tablename);
+		cmdq_error(cmdq, "unknown key table: %s", tablename);
 		return (CMD_RETURN_ERROR);
 	}
 
@@ -138,7 +138,7 @@ cmd_list_keys_table(struct cmd *self, struct cmd_ctx *ctx)
 			mode = "c";
 		cmdstr = mode_key_tostring(mtab->cmdstr, mbind->cmd);
 		if (cmdstr != NULL) {
-			ctx->print(ctx, "bind-key -%st %s%s %*s %s%s%s%s",
+			cmdq_print(cmdq, "bind-key -%st %s%s %*s %s%s%s%s",
 			    mode, any_mode && *mode == '\0' ? " " : "",
 			    mtab->name, (int) width, key, cmdstr,
 			    mbind->arg != NULL ? " \"" : "",