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, 5 insertions, 5 deletions

diff --git a/cmd-choose-buffer.c b/cmd-choose-buffer.c
index a58e38b7..8713815d 100644
--- a/cmd-choose-buffer.c
+++ b/cmd-choose-buffer.c
@@ -27,7 +27,7 @@
  * Enter choice mode to choose a buffer.
  */
 
-enum cmd_retval	 cmd_choose_buffer_exec(struct cmd *, struct cmd_ctx *);
+enum cmd_retval	 cmd_choose_buffer_exec(struct cmd *, struct cmd_q *);
 
 const struct cmd_entry cmd_choose_buffer_entry = {
 	"choose-buffer", NULL,
@@ -40,7 +40,7 @@ const struct cmd_entry cmd_choose_buffer_entry = {
 };
 
 enum cmd_retval
-cmd_choose_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
+cmd_choose_buffer_exec(struct cmd *self, struct cmd_q *cmdq)
 {
 	struct args			*args = self->args;
 	struct client			*c;
@@ -51,15 +51,15 @@ cmd_choose_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
 	const char			*template;
 	u_int				 idx;
 
-	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);
 	}
 
 	if ((template = args_get(args, 'F')) == NULL)
 		template = CHOOSE_BUFFER_TEMPLATE;
 
-	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 (paste_get_top(&global_buffers) == NULL)