Change from a per-session stack of buffers to one global stack which is

much more convenient and also simplifies lot of code. This renders
copy-buffer useless and makes buffer-limit now a server option.

By Tiago Cunha.

cmd-capture-pane.c

@@ -18,6 +18,7 @@
 
 #include <sys/types.h>
 
+#include <stdlib.h>
 #include <string.h>
 
 #include "tmux.h"
@@ -26,31 +27,93 @@
  * Write the entire contents of a pane to a buffer.
  */
 
+int	cmd_capture_pane_parse(struct cmd *, int, char **, char **);
 int	cmd_capture_pane_exec(struct cmd *, struct cmd_ctx *);
+void	cmd_capture_pane_free(struct cmd *);
+void	cmd_capture_pane_init(struct cmd *, int);
+size_t	cmd_capture_pane_print(struct cmd *, char *, size_t);
+
+struct cmd_capture_pane_data {
+	char	*target;
+	int	 buffer;
+};
 
 const struct cmd_entry cmd_capture_pane_entry = {
 	"capture-pane", "capturep",
 	CMD_BUFFER_PANE_USAGE,
 	0, "",
-	cmd_buffer_init,
-	cmd_buffer_parse,
+	cmd_capture_pane_init,
+	cmd_capture_pane_parse,
 	cmd_capture_pane_exec,
-	cmd_buffer_free,
-	cmd_buffer_print
+	cmd_capture_pane_free,
+	cmd_capture_pane_print
 };
 
+/* ARGSUSED */
+void
+cmd_capture_pane_init(struct cmd *self, unused int arg)
+{
+	struct cmd_capture_pane_data	*data;
+
+	self->data = data = xmalloc(sizeof *data);
+	data->buffer = -1;
+	data->target = NULL;
+}
+
+int
+cmd_capture_pane_parse(struct cmd *self, int argc, char **argv, char **cause)
+{
+	struct cmd_capture_pane_data	*data;
+	const char			*errstr;
+	int				 n, opt;
+
+	self->entry->init(self, KEYC_NONE);
+	data = self->data;
+
+	while ((opt = getopt(argc, argv, "b:t:")) != -1) {
+		switch (opt) {
+		case 'b':
+			if (data->buffer == -1) {
+				n = strtonum(optarg, 0, INT_MAX, &errstr);
+				if (errstr != NULL) {
+					xasprintf(cause, "buffer %s", errstr);
+					goto error;
+				}
+				data->buffer = n;
+			}
+			break;
+		case 't':
+			if (data->target == NULL)
+				data->target = xstrdup(optarg);
+			break;
+		default:
+			goto usage;
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	return (0);
+
+usage:
+	xasprintf(cause, "usage: %s %s", self->entry->name, self->entry->usage);
+
+error:
+	self->entry->free(self);
+	return (-1);
+}
+
 int
 cmd_capture_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
 {
-	struct cmd_buffer_data	*data = self->data;
-	struct window_pane	*wp;
-	char 			*buf, *line;
-	struct screen		*s;
-	struct session		*sess;
-	u_int			 i, limit;
-	size_t         		 len, linelen;
+	struct cmd_capture_pane_data	*data = self->data;
+	struct window_pane		*wp;
+	char 				*buf, *line;
+	struct screen			*s;
+	u_int			 	 i, limit;
+	size_t         		 	 len, linelen;
 
-	if (cmd_find_pane(ctx, data->target, &sess, &wp) == NULL)
+	if (cmd_find_pane(ctx, data->target, NULL, &wp) == NULL)
 		return (-1);
 	s = &wp->base;
 
@@ -69,15 +132,41 @@ cmd_capture_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
 	       xfree(line);
 	}
 
-	limit = options_get_number(&sess->options, "buffer-limit");
+	limit = options_get_number(&global_options, "buffer-limit");
 	if (data->buffer == -1) {
-		paste_add(&sess->buffers, buf, len, limit);
+		paste_add(&global_buffers, buf, len, limit);
 		return (0);
 	}
-	if (paste_replace(&sess->buffers, data->buffer, buf, len) != 0) {
+	if (paste_replace(&global_buffers, data->buffer, buf, len) != 0) {
 		ctx->error(ctx, "no buffer %d", data->buffer);
 		xfree(buf);
 		return (-1);
 	}
 	return (0);
 }
+
+void
+cmd_capture_pane_free(struct cmd *self)
+{
+	struct cmd_capture_pane_data	*data = self->data;
+
+	if (data->target != NULL)
+		xfree(data->target);
+	xfree(data);
+}
+
+size_t
+cmd_capture_pane_print(struct cmd *self, char *buf, size_t len)
+{
+	struct cmd_capture_pane_data	*data = self->data;
+	size_t				 off = 0;
+
+	off += xsnprintf(buf, len, "%s", self->entry->name);
+	if (data == NULL)
+		return (off);
+	if (off < len && data->buffer != -1)
+		off += xsnprintf(buf + off, len - off, " -b %d", data->buffer);
+	if (off < len && data->target != NULL)
+		off += xsnprintf(buf + off, len - off, " -t %s", data->target);
+	return (off);
+}