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, 3 insertions, 3 deletions

diff --git a/cmd-copy-mode.c b/cmd-copy-mode.c
index 8a5b5fc4..f014be83 100644
--- a/cmd-copy-mode.c
+++ b/cmd-copy-mode.c
@@ -25,7 +25,7 @@
  */
 
 void		 cmd_copy_mode_key_binding(struct cmd *, int);
-enum cmd_retval	 cmd_copy_mode_exec(struct cmd *, struct cmd_ctx *);
+enum cmd_retval	 cmd_copy_mode_exec(struct cmd *, struct cmd_q *);
 
 const struct cmd_entry cmd_copy_mode_entry = {
 	"copy-mode", NULL,
@@ -46,12 +46,12 @@ cmd_copy_mode_key_binding(struct cmd *self, int key)
 }
 
 enum cmd_retval
-cmd_copy_mode_exec(struct cmd *self, struct cmd_ctx *ctx)
+cmd_copy_mode_exec(struct cmd *self, struct cmd_q *cmdq)
 {
 	struct args		*args = self->args;
 	struct window_pane	*wp;
 
-	if (cmd_find_pane(ctx, args_get(args, 't'), NULL, &wp) == NULL)
+	if (cmd_find_pane(cmdq, args_get(args, 't'), NULL, &wp) == NULL)
 		return (CMD_RETURN_ERROR);
 
 	if (window_pane_set_mode(wp, &window_copy_mode) != 0)