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, 6 insertions, 6 deletions

diff --git a/cmd-find-window.c b/cmd-find-window.c
index 8d34e60e..02f19307 100644
--- a/cmd-find-window.c
+++ b/cmd-find-window.c
@@ -28,7 +28,7 @@
  * Find window containing text.
  */
 
-enum cmd_retval	 cmd_find_window_exec(struct cmd *, struct cmd_ctx *);
+enum cmd_retval	 cmd_find_window_exec(struct cmd *, struct cmd_q *);
 
 void	cmd_find_window_callback(struct window_choose_data *);
 
@@ -127,7 +127,7 @@ cmd_find_window_match(struct cmd_find_window_data_list *find_list,
 }
 
 enum cmd_retval
-cmd_find_window_exec(struct cmd *self, struct cmd_ctx *ctx)
+cmd_find_window_exec(struct cmd *self, struct cmd_q *cmdq)
 {
 	struct args			*args = self->args;
 	struct client			*c;
@@ -139,13 +139,13 @@ cmd_find_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 	const char			*template;
 	u_int				 i, match_flags;
 
-	if ((c = cmd_current_client(ctx)) == NULL) {
-		ctx->error(ctx, "no client available");
+	if ((c = cmd_current_client(cmdq)) == NULL) {
+		cmdq_error(cmdq, "no client available");
 		return (CMD_RETURN_ERROR);
 	}
 	s = c->session;
 
-	if ((wl = cmd_find_window(ctx, args_get(args, 't'), NULL)) == NULL)
+	if ((wl = cmd_find_window(cmdq, args_get(args, 't'), NULL)) == NULL)
 		return (CMD_RETURN_ERROR);
 
 	if ((template = args_get(args, 'F')) == NULL)
@@ -162,7 +162,7 @@ cmd_find_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 	free(searchstr);
 
 	if (ARRAY_LENGTH(&find_list) == 0) {
-		ctx->error(ctx, "no windows matching: %s", str);
+		cmdq_error(cmdq, "no windows matching: %s", str);
 		ARRAY_FREE(&find_list);
 		return (CMD_RETURN_ERROR);
 	}