Import tmux, a terminal multiplexor allowing (among other things) a single

terminal to be switched between several different windows and programs
displayed on one terminal be detached from one terminal and moved to another.

ok deraadt pirofti

1 files changed, 138 insertions, 0 deletions

diff --git a/resize.c b/resize.c
new file mode 100644
index 00000000..50e12fb0
--- /dev/null
+++ b/resize.c
@@ -0,0 +1,138 @@
+/* $OpenBSD$ */
+
+/*
+ * Copyright (c) 2007 Nicholas Marriott <nicm@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"
+
+/*
+ * Recalculate window and session sizes.
+ *
+ * Every session has the size of the smallest client it is attached to and
+ * every window the size of the smallest session it is attached to.
+ *
+ * So, when a client is resized or a session attached to or detached from a
+ * client, the window sizes must be recalculated. For each session, find the
+ * smallest client it is attached to, and resize it to that size. Then for
+ * every window, find the smallest session it is attached to, resize it to that
+ * size and clear and redraw every client with it as the current window.
+ *
+ * This is quite inefficient - better/additional data structures are needed
+ * to make it better.
+ *
+ * As a side effect, this function updates the SESSION_UNATTACHED flag. This
+ * flag is necessary to make sure unattached sessions do not limit the size of
+ * windows that are attached both to them and to other (attached) sessions.
+ */
+
+void
+recalculate_sizes(void)
+{
+	struct session		*s;
+	struct client		*c;
+	struct window		*w;
+	u_int		 	 i, j, ssx, ssy, has, limit;
+	int		 	 flag;
+
+	for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
+		s = ARRAY_ITEM(&sessions, i);
+		if (s == NULL)
+			continue;
+
+		ssx = ssy = UINT_MAX;
+		for (j = 0; j < ARRAY_LENGTH(&clients); j++) {
+			c = ARRAY_ITEM(&clients, j);
+			if (c == NULL)
+				continue;
+			if (c->session == s) {
+				if (c->tty.sx < ssx)
+					ssx = c->tty.sx;
+				if (c->tty.sy < ssy)
+					ssy = c->tty.sy;
+			}
+		}
+		if (ssx == UINT_MAX || ssy == UINT_MAX) {
+			s->flags |= SESSION_UNATTACHED;
+			continue;
+		}
+		s->flags &= ~SESSION_UNATTACHED;
+
+		if (options_get_number(&s->options, "status")) {
+			if (ssy == 0)
+				ssy = 1;
+			else
+				ssy--;
+		}
+		if (s->sx == ssx && s->sy == ssy)
+			continue;
+
+		log_debug(
+		    "session size %u,%u (was %u,%u)", ssx, ssy, s->sx, s->sy);
+
+		s->sx = ssx;
+		s->sy = ssy;
+	}
+
+	for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
+		w = ARRAY_ITEM(&windows, i);
+		if (w == NULL)
+			continue;
+		flag = options_get_number(&w->options, "aggressive-resize");
+
+		ssx = ssy = UINT_MAX;
+		for (j = 0; j < ARRAY_LENGTH(&sessions); j++) {
+			s = ARRAY_ITEM(&sessions, j);
+			if (s == NULL || s->flags & SESSION_UNATTACHED)
+				continue;
+			if (flag)
+				has = s->curw->window == w;
+			else
+				has = session_has(s, w);
+			if (has) {
+				if (s->sx < ssx)
+					ssx = s->sx;
+				if (s->sy < ssy)
+					ssy = s->sy;
+			}
+		}
+		if (ssx == UINT_MAX || ssy == UINT_MAX) {
+			w->flags |= WINDOW_HIDDEN;
+			continue;
+		}
+		w->flags &= ~WINDOW_HIDDEN;
+
+		limit = options_get_number(&w->options, "force-width");
+		if (limit != 0 && ssx > limit)
+			ssx = limit;
+		limit = options_get_number(&w->options, "force-height");
+		if (limit != 0 && ssy > limit)
+			ssy = limit;
+
+		if (w->sx == ssx && w->sy == ssy)
+			continue;
+
+		log_debug(
+		    "window size %u,%u (was %u,%u)", ssx, ssy, w->sx, w->sy);
+
+		window_resize(w, ssx, ssy);
+		server_redraw_window(w);
+		layout_refresh(w, 0);
+	}
+}