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, 373 insertions, 0 deletions

diff --git a/layout.c b/layout.c
new file mode 100644
index 00000000..1ae946e5
--- /dev/null
+++ b/layout.c
@@ -0,0 +1,373 @@
+/* $OpenBSD$ */
+
+/*
+ * Copyright (c) 2009 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"
+
+/*
+ * Each layout has two functions, _refresh to relayout the panes and _resize to
+ * resize a single pane.
+ *
+ * Second argument (int) to _refresh is 1 if the only change has been that the
+ * active pane has changed. If 0 then panes, active pane or both may have
+ * changed.
+ */
+
+void	layout_active_only_refresh(struct window *, int);
+void	layout_even_h_refresh(struct window *, int);
+void	layout_even_v_refresh(struct window *, int);
+void	layout_main_h_refresh(struct window *, int);
+void	layout_main_v_refresh(struct window *, int);
+
+const struct {
+	const char     *name;
+	void		(*refresh)(struct window *, int);
+	void		(*resize)(struct window_pane *, int);
+} layouts[] = {
+	{ "manual-vertical", layout_manual_v_refresh, layout_manual_v_resize },
+	{ "active-only", layout_active_only_refresh, NULL },
+	{ "even-horizontal", layout_even_h_refresh, NULL },
+	{ "even-vertical", layout_even_v_refresh, NULL },
+	{ "main-horizontal", layout_main_h_refresh, NULL },
+	{ "main-vertical", layout_main_v_refresh, NULL },
+};
+
+const char *
+layout_name(struct window *w)
+{
+	return (layouts[w->layout].name);
+}
+
+int
+layout_lookup(const char *name)
+{
+	u_int	i;
+	int	matched = -1;
+
+	for (i = 0; i < nitems(layouts); i++) {
+		if (strncmp(layouts[i].name, name, strlen(name)) == 0) {
+			if (matched != -1)	/* ambiguous */
+				return (-1);
+			matched = i;
+		}
+	}
+
+	return (matched);
+}
+
+int
+layout_select(struct window *w, u_int layout)
+{
+	if (layout > nitems(layouts) - 1 || layout == w->layout)
+		return (-1);
+	w->layout = layout;
+
+	layout_refresh(w, 0);
+	return (0);
+}
+
+void
+layout_next(struct window *w)
+{
+	w->layout++;
+	if (w->layout > nitems(layouts) - 1)
+		w->layout = 0;
+	layout_refresh(w, 0);
+}
+
+void
+layout_previous(struct window *w)
+{
+	if (w->layout == 0)
+		w->layout = nitems(layouts) - 1;
+	else
+		w->layout--;
+	layout_refresh(w, 0);
+}
+
+void
+layout_refresh(struct window *w, int active_only)
+{
+	layouts[w->layout].refresh(w, active_only);
+	server_redraw_window(w);
+}
+
+int
+layout_resize(struct window_pane *wp, int adjust)
+{
+	struct window	*w = wp->window;
+
+	if (layouts[w->layout].resize == NULL)
+		return (-1);
+	layouts[w->layout].resize(wp, adjust);
+	return (0);
+}
+
+void
+layout_active_only_refresh(struct window *w, unused int active_only)
+{
+	struct window_pane	*wp;
+
+	TAILQ_FOREACH(wp, &w->panes, entry) {
+		if (wp == w->active) {
+			wp->flags &= ~PANE_HIDDEN;
+			wp->xoff = wp->yoff = 0;
+			window_pane_resize(wp, w->sx, w->sy);
+		} else
+			wp->flags |= PANE_HIDDEN;
+	}
+}
+
+void
+layout_even_h_refresh(struct window *w, int active_only)
+{
+	struct window_pane	*wp;
+	u_int			 i, n, width, xoff;
+
+	if (active_only)
+		return;
+
+	/* Get number of panes. */
+	n = window_count_panes(w);
+	if (n == 0)
+		return;
+
+	/* How many can we fit? */
+	if (w->sx / n < PANE_MINIMUM) {
+		width = PANE_MINIMUM;
+		n = w->sx / PANE_MINIMUM;
+	} else
+		width = w->sx / n;
+
+	/* Fit the panes. */
+	i = xoff = 0;
+	TAILQ_FOREACH(wp, &w->panes, entry) {
+		if (i > n) {
+			wp->flags |= PANE_HIDDEN;
+			continue;
+		}
+		wp->flags &= ~PANE_HIDDEN;
+
+		wp->xoff = xoff;
+		wp->yoff = 0;
+		if (i != n - 1)
+ 			window_pane_resize(wp, width - 1, w->sy);
+		else
+ 			window_pane_resize(wp, width, w->sy);
+
+		i++;
+		xoff += width;
+	}
+
+	/* Any space left? */
+	while (xoff++ < w->sx) {
+		wp = TAILQ_LAST(&w->panes, window_panes);
+		window_pane_resize(wp, wp->sx + 1, wp->sy);
+	}
+}
+
+void
+layout_even_v_refresh(struct window *w, int active_only)
+{
+	struct window_pane	*wp;
+	u_int			 i, n, height, yoff;
+
+	if (active_only)
+		return;
+
+	/* Get number of panes. */
+	n = window_count_panes(w);
+	if (n == 0)
+		return;
+
+	/* How many can we fit? */
+	if (w->sy / n < PANE_MINIMUM) {
+		height = PANE_MINIMUM;
+		n = w->sy / PANE_MINIMUM;
+	} else
+		height = w->sy / n;
+
+	/* Fit the panes. */
+	i = yoff = 0;
+	TAILQ_FOREACH(wp, &w->panes, entry) {
+		if (i > n) {
+			wp->flags |= PANE_HIDDEN;
+			continue;
+		}
+		wp->flags &= ~PANE_HIDDEN;
+
+		wp->xoff = 0;
+		wp->yoff = yoff;
+		if (i != n - 1)
+ 			window_pane_resize(wp, w->sx, height - 1);
+		else
+ 			window_pane_resize(wp, w->sx, height);
+
+		i++;
+		yoff += height;
+	}
+
+	/* Any space left? */
+	while (yoff++ < w->sy) {
+		wp = TAILQ_LAST(&w->panes, window_panes);
+		window_pane_resize(wp, wp->sx, wp->sy + 1);
+	}
+}
+
+void
+layout_main_v_refresh(struct window *w, int active_only)
+{
+	struct window_pane	*wp;
+	u_int			 i, n, mainwidth, height, yoff;
+
+	if (active_only)
+		return;
+
+	/* Get number of panes. */
+	n = window_count_panes(w);
+	if (n == 0)
+		return;
+
+	/* Get the main pane width and add one for separator line. */
+	mainwidth = options_get_number(&w->options, "main-pane-width") + 1;
+
+	/* Need >1 pane and minimum columns; if fewer, display active only. */
+	if (n == 1 || w->sx < mainwidth + PANE_MINIMUM) {
+		layout_active_only_refresh(w, active_only);
+		return;
+	}
+	n--;
+
+	/* How many can we fit, not including first? */
+	if (w->sy / n < PANE_MINIMUM) {
+		height = PANE_MINIMUM;
+		n = w->sy / PANE_MINIMUM;
+	} else
+		height = w->sy / n;
+
+	/* Fit the panes. */
+	i = yoff = 0;
+	TAILQ_FOREACH(wp, &w->panes, entry) {
+		if (wp == TAILQ_FIRST(&w->panes)) {
+			wp->xoff = 0;
+			wp->yoff = 0;
+			window_pane_resize(wp, mainwidth - 1, w->sy);
+			wp->flags &= ~PANE_HIDDEN;
+			continue;
+		}
+
+		if (i > n) {
+			wp->flags |= PANE_HIDDEN;
+			continue;
+		}
+		wp->flags &= ~PANE_HIDDEN;
+
+		wp->xoff = mainwidth;
+		wp->yoff = yoff;
+		if (i != n - 1)
+ 			window_pane_resize(wp, w->sx - mainwidth, height - 1);
+		else
+ 			window_pane_resize(wp, w->sx - mainwidth, height);
+
+		i++;
+		yoff += height;
+	}
+
+	/* Any space left? */
+	while (yoff++ < w->sy) {
+		wp = TAILQ_LAST(&w->panes, window_panes);
+		while (wp != NULL && wp == TAILQ_FIRST(&w->panes))
+			wp = TAILQ_PREV(wp, window_panes, entry);
+		if (wp == NULL)
+			break;
+		window_pane_resize(wp, wp->sx, wp->sy + 1);
+	}
+}
+
+void
+layout_main_h_refresh(struct window *w, int active_only)
+{
+	struct window_pane	*wp;
+	u_int			 i, n, mainheight, width, xoff;
+
+	if (active_only)
+		return;
+
+	/* Get number of panes. */
+	n = window_count_panes(w);
+	if (n == 0)
+		return;
+
+	/* Get the main pane height and add one for separator line. */
+	mainheight = options_get_number(&w->options, "main-pane-height") + 1;
+
+	/* Need >1 pane and minimum rows; if fewer, display active only. */
+	if (n == 1 || w->sy < mainheight + PANE_MINIMUM) {
+		layout_active_only_refresh(w, active_only);
+		return;
+	}
+	n--;
+
+	/* How many can we fit, not including first? */
+	if (w->sx / n < PANE_MINIMUM) {
+		width = PANE_MINIMUM;
+		n = w->sx / PANE_MINIMUM;
+	} else
+		width = w->sx / n;
+
+	/* Fit the panes. */
+	i = xoff = 0;
+	TAILQ_FOREACH(wp, &w->panes, entry) {
+		if (wp == TAILQ_FIRST(&w->panes)) {
+			wp->xoff = 0;
+			wp->yoff = 0;
+			window_pane_resize(wp, w->sx, mainheight - 1);
+			wp->flags &= ~PANE_HIDDEN;
+			continue;
+		}
+
+		if (i > n) {
+			wp->flags |= PANE_HIDDEN;
+			continue;
+		}
+		wp->flags &= ~PANE_HIDDEN;
+
+		wp->xoff = xoff;
+		wp->yoff = mainheight;
+		if (i != n - 1)
+ 			window_pane_resize(wp, width - 1, w->sy - mainheight);
+		else
+ 			window_pane_resize(wp, width - 1, w->sy - mainheight);
+
+		i++;
+		xoff += width;
+	}
+
+	/* Any space left? */
+	while (xoff++ < w->sx + 1) {
+		wp = TAILQ_LAST(&w->panes, window_panes);
+		while (wp != NULL && wp == TAILQ_FIRST(&w->panes))
+			wp = TAILQ_PREV(wp, window_panes, entry);
+		if (wp == NULL)
+			break;
+		window_pane_resize(wp, wp->sx + 1, wp->sy);
+	}
+}