New command, capture-pane, which copies the entire pane contents to a paste

buffer. From Jonathan Alvarado.

cmd-capture-pane.c

@@ -0,0 +1,81 @@
+/* $OpenBSD$ */
+
+/*
+ * Copyright (c) 2009 Jonathan Alvarado <radobobo@users.sourceforge.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+
+#include <string.h>
+
+#include "tmux.h"
+
+/*
+ * Write the entire contents of a pane to a buffer.
+ */
+
+int	cmd_capture_pane_exec(struct cmd *, struct cmd_ctx *);
+
+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_exec,
+	cmd_buffer_free,
+	cmd_buffer_print
+};
+
+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; 
+
+	if (cmd_find_pane(ctx, data->target, &sess, &wp) == NULL)
+		return (-1);
+	s = &wp->base;
+
+	buf = NULL;
+	len = 0;
+
+	for (i = 0; i < screen_size_y(s); i++) {
+	       line = grid_view_string_cells(s->grid, 0, i, screen_size_x(s));
+	       linelen = strlen(line);
+
+	       buf = xrealloc(buf, 1, len + linelen + 1);
+	       memcpy(buf + len, line, linelen);
+	       len += linelen;
+	       buf[len++] = '\n';
+	}
+
+	limit = options_get_number(&sess->options, "buffer-limit");
+	if (data->buffer == -1) {
+		paste_add(&sess->buffers, buf, len, limit);
+		return (0);
+	}
+	if (paste_replace(&sess->buffers, data->buffer, buf, len) != 0) {
+		ctx->error(ctx, "no buffer %d", data->buffer);
+		xfree(buf);
+		return (-1);
+	}
+	return (0);
+}