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tmux/layout-set.c
Nicholas Marriott 641191ab20 Support for windows larger than the client. 
This adds two new options, window-size and default-size, and a new
command, resize-window.

The force-width and force-height options, and the session_width and
session_height formats have been removed.

The new window-size option tells tmux how to work out the size of
windows: largest means it picks the size of the largest session,
smallest the smallest session (similar to the old behaviour) and
manual means that it does not automatically resize
windows. aggressive-resize modifies the choice of session for largest
and smallest as it did before.

If a window is in a session attached to a client that is too small,
only part of the window is shown. tmux attempts to keep the cursor
visible, so the part of the window displayed is changed as the cursor
moves (with a small delay, to try and avoid excess redrawing when
applications redraw status lines or similar that are not currently
visible).

Drawing windows which are larger than the client is not as efficient
as those which fit, particularly when the cursor moves, so it is
recommended to avoid using this on slow machines or networks (set
window-size to smallest or manual).

The resize-window command can be used to resize a window manually. If
it is used, the window-size option is automatically set to manual for
the window (undo this with "setw -u window-size"). resize-window works
in a similar way to resize-pane (-U -D -L -R -x -y flags) but also has
-a and -A flags. -a sets the window to the size of the smallest client
(what it would be if window-size was smallest) and -A the largest.

For the same behaviour as force-width or force-height, use
resize-width -x or -y.

If the global window-size option is set to manual, the default-size
option is used for new windows. If -x or -y is used with new-session,
that sets the default-size option for the new session.

The maximum size of a window is 10000x10000. But expect applications
to complain and higher memory use if you make a window that big. The
minimum size is the size required for the current layout including
borders.

This change allows some code improvements, most notably that since
windows can now never be cropped, that code can be removed from the
layout code, and since panes can now never be outside the size of the
window, window_pane_visible can be removed.
2018-08-20 15:22:14 +01:00

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/* $OpenBSD$ */
/*
* Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* 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"
/*
* Set window layouts - predefined methods to arrange windows. These are
* one-off and generate a layout tree.
*/
static void layout_set_even_h(struct window *);
static void layout_set_even_v(struct window *);
static void layout_set_main_h(struct window *);
static void layout_set_main_v(struct window *);
static void layout_set_tiled(struct window *);
static const struct {
const char *name;
void (*arrange)(struct window *);
} layout_sets[] = {
{ "even-horizontal", layout_set_even_h },
{ "even-vertical", layout_set_even_v },
{ "main-horizontal", layout_set_main_h },
{ "main-vertical", layout_set_main_v },
{ "tiled", layout_set_tiled },
};
int
layout_set_lookup(const char *name)
{
u_int i;
int matched = -1;
for (i = 0; i < nitems(layout_sets); i++) {
if (strncmp(layout_sets[i].name, name, strlen(name)) == 0) {
if (matched != -1) /* ambiguous */
return (-1);
matched = i;
}
}
return (matched);
}
u_int
layout_set_select(struct window *w, u_int layout)
{
if (layout > nitems(layout_sets) - 1)
layout = nitems(layout_sets) - 1;
if (layout_sets[layout].arrange != NULL)
layout_sets[layout].arrange(w);
w->lastlayout = layout;
return (layout);
}
u_int
layout_set_next(struct window *w)
{
u_int layout;
if (w->lastlayout == -1)
layout = 0;
else {
layout = w->lastlayout + 1;
if (layout > nitems(layout_sets) - 1)
layout = 0;
}
if (layout_sets[layout].arrange != NULL)
layout_sets[layout].arrange(w);
w->lastlayout = layout;
return (layout);
}
u_int
layout_set_previous(struct window *w)
{
u_int layout;
if (w->lastlayout == -1)
layout = nitems(layout_sets) - 1;
else {
layout = w->lastlayout;
if (layout == 0)
layout = nitems(layout_sets) - 1;
else
layout--;
}
if (layout_sets[layout].arrange != NULL)
layout_sets[layout].arrange(w);
w->lastlayout = layout;
return (layout);
}
static void
layout_set_even(struct window *w, enum layout_type type)
{
struct window_pane *wp;
struct layout_cell *lc, *lcnew;
u_int n;
layout_print_cell(w->layout_root, __func__, 1);
/* Get number of panes. */
n = window_count_panes(w);
if (n <= 1)
return;
/* Free the old root and construct a new. */
layout_free(w);
lc = w->layout_root = layout_create_cell(NULL);
layout_set_size(lc, w->sx, w->sy, 0, 0);
layout_make_node(lc, type);
/* Build new leaf cells. */
TAILQ_FOREACH(wp, &w->panes, entry) {
lcnew = layout_create_cell(lc);
layout_make_leaf(lcnew, wp);
lcnew->sx = w->sx;
lcnew->sy = w->sy;
TAILQ_INSERT_TAIL(&lc->cells, lcnew, entry);
}
/* Spread out cells. */
layout_spread_cell(w, lc);
/* Fix cell offsets. */
layout_fix_offsets(lc);
layout_fix_panes(w);
layout_print_cell(w->layout_root, __func__, 1);
notify_window("window-layout-changed", w);
server_redraw_window(w);
}
static void
layout_set_even_h(struct window *w)
{
layout_set_even(w, LAYOUT_LEFTRIGHT);
}
static void
layout_set_even_v(struct window *w)
{
layout_set_even(w, LAYOUT_TOPBOTTOM);
}
static void
layout_set_main_h(struct window *w)
{
struct window_pane *wp;
struct layout_cell *lc, *lcmain, *lcrow, *lcchild;
u_int n, mainheight, otherheight, width, height;
u_int used, i, j, columns, rows, totalrows;
layout_print_cell(w->layout_root, __func__, 1);
/* Get number of panes. */
n = window_count_panes(w);
if (n <= 1)
return;
n--; /* take off main pane */
/* How many rows and columns will be needed, not counting main? */
columns = (w->sx + 1) / (PANE_MINIMUM + 1); /* maximum columns */
if (columns == 0)
columns = 1;
rows = 1 + (n - 1) / columns;
columns = 1 + (n - 1) / rows;
width = (w->sx - (n - 1)) / columns;
/* Get the main pane height and add one for separator line. */
mainheight = options_get_number(w->options, "main-pane-height") + 1;
/* Get the optional other pane height and add one for separator line. */
otherheight = options_get_number(w->options, "other-pane-height") + 1;
/*
* If an other pane height was specified, honour it so long as it
* doesn't shrink the main height to less than the main-pane-height
*/
if (otherheight > 1 && w->sy - otherheight > mainheight)
mainheight = w->sy - otherheight;
if (mainheight < PANE_MINIMUM + 1)
mainheight = PANE_MINIMUM + 1;
/* Try and make everything fit. */
totalrows = rows * (PANE_MINIMUM + 1) - 1;
if (mainheight + totalrows > w->sy) {
if (totalrows + PANE_MINIMUM + 1 > w->sy)
mainheight = PANE_MINIMUM + 2;
else
mainheight = w->sy - totalrows;
height = PANE_MINIMUM;
} else
height = (w->sy - mainheight - (rows - 1)) / rows;
/* Free old tree and create a new root. */
layout_free(w);
lc = w->layout_root = layout_create_cell(NULL);
layout_set_size(lc, w->sx, mainheight + rows * (height + 1) - 1, 0, 0);
layout_make_node(lc, LAYOUT_TOPBOTTOM);
/* Create the main pane. */
lcmain = layout_create_cell(lc);
layout_set_size(lcmain, w->sx, mainheight - 1, 0, 0);
layout_make_leaf(lcmain, TAILQ_FIRST(&w->panes));
TAILQ_INSERT_TAIL(&lc->cells, lcmain, entry);
/* Create a grid of the remaining cells. */
wp = TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry);
for (j = 0; j < rows; j++) {
/* If this is the last cell, all done. */
if (wp == NULL)
break;
/* Create the new row. */
lcrow = layout_create_cell(lc);
layout_set_size(lcrow, w->sx, height, 0, 0);
TAILQ_INSERT_TAIL(&lc->cells, lcrow, entry);
/* If only one column, just use the row directly. */
if (columns == 1) {
layout_make_leaf(lcrow, wp);
wp = TAILQ_NEXT(wp, entry);
continue;
}
/* Add in the columns. */
layout_make_node(lcrow, LAYOUT_LEFTRIGHT);
for (i = 0; i < columns; i++) {
/* Create and add a pane cell. */
lcchild = layout_create_cell(lcrow);
layout_set_size(lcchild, width, height, 0, 0);
layout_make_leaf(lcchild, wp);
TAILQ_INSERT_TAIL(&lcrow->cells, lcchild, entry);
/* Move to the next cell. */
if ((wp = TAILQ_NEXT(wp, entry)) == NULL)
break;
}
/* Adjust the row to fit the full width if necessary. */
if (i == columns)
i--;
used = ((i + 1) * (width + 1)) - 1;
if (w->sx <= used)
continue;
lcchild = TAILQ_LAST(&lcrow->cells, layout_cells);
layout_resize_adjust(w, lcchild, LAYOUT_LEFTRIGHT,
w->sx - used);
}
/* Adjust the last row height to fit if necessary. */
used = mainheight + (rows * height) + rows - 1;
if (w->sy > used) {
lcrow = TAILQ_LAST(&lc->cells, layout_cells);
layout_resize_adjust(w, lcrow, LAYOUT_TOPBOTTOM,
w->sy - used);
}
/* Fix cell offsets. */
layout_fix_offsets(lc);
layout_fix_panes(w);
layout_print_cell(w->layout_root, __func__, 1);
notify_window("window-layout-changed", w);
server_redraw_window(w);
}
static void
layout_set_main_v(struct window *w)
{
struct window_pane *wp;
struct layout_cell *lc, *lcmain, *lccolumn, *lcchild;
u_int n, mainwidth, otherwidth, width, height;
u_int used, i, j, columns, rows, totalcolumns;
layout_print_cell(w->layout_root, __func__, 1);
/* Get number of panes. */
n = window_count_panes(w);
if (n <= 1)
return;
n--; /* take off main pane */
/* How many rows and columns will be needed, not counting main? */
rows = (w->sy + 1) / (PANE_MINIMUM + 1); /* maximum rows */
if (rows == 0)
rows = 1;
columns = 1 + (n - 1) / rows;
rows = 1 + (n - 1) / columns;
height = (w->sy - (n - 1)) / rows;
/* Get the main pane width and add one for separator line. */
mainwidth = options_get_number(w->options, "main-pane-width") + 1;
/* Get the optional other pane width and add one for separator line. */
otherwidth = options_get_number(w->options, "other-pane-width") + 1;
/*
* If an other pane width was specified, honour it so long as it
* doesn't shrink the main width to less than the main-pane-width
*/
if (otherwidth > 1 && w->sx - otherwidth > mainwidth)
mainwidth = w->sx - otherwidth;
if (mainwidth < PANE_MINIMUM + 1)
mainwidth = PANE_MINIMUM + 1;
/* Try and make everything fit. */
totalcolumns = columns * (PANE_MINIMUM + 1) - 1;
if (mainwidth + totalcolumns > w->sx) {
if (totalcolumns + PANE_MINIMUM + 1 > w->sx)
mainwidth = PANE_MINIMUM + 2;
else
mainwidth = w->sx - totalcolumns;
width = PANE_MINIMUM;
} else
width = (w->sx - mainwidth - (columns - 1)) / columns;
/* Free old tree and create a new root. */
layout_free(w);
lc = w->layout_root = layout_create_cell(NULL);
layout_set_size(lc, mainwidth + columns * (width + 1) - 1, w->sy, 0, 0);
layout_make_node(lc, LAYOUT_LEFTRIGHT);
/* Create the main pane. */
lcmain = layout_create_cell(lc);
layout_set_size(lcmain, mainwidth - 1, w->sy, 0, 0);
layout_make_leaf(lcmain, TAILQ_FIRST(&w->panes));
TAILQ_INSERT_TAIL(&lc->cells, lcmain, entry);
/* Create a grid of the remaining cells. */
wp = TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry);
for (j = 0; j < columns; j++) {
/* If this is the last cell, all done. */
if (wp == NULL)
break;
/* Create the new column. */
lccolumn = layout_create_cell(lc);
layout_set_size(lccolumn, width, w->sy, 0, 0);
TAILQ_INSERT_TAIL(&lc->cells, lccolumn, entry);
/* If only one row, just use the row directly. */
if (rows == 1) {
layout_make_leaf(lccolumn, wp);
wp = TAILQ_NEXT(wp, entry);
continue;
}
/* Add in the rows. */
layout_make_node(lccolumn, LAYOUT_TOPBOTTOM);
for (i = 0; i < rows; i++) {
/* Create and add a pane cell. */
lcchild = layout_create_cell(lccolumn);
layout_set_size(lcchild, width, height, 0, 0);
layout_make_leaf(lcchild, wp);
TAILQ_INSERT_TAIL(&lccolumn->cells, lcchild, entry);
/* Move to the next cell. */
if ((wp = TAILQ_NEXT(wp, entry)) == NULL)
break;
}
/* Adjust the column to fit the full height if necessary. */
if (i == rows)
i--;
used = ((i + 1) * (height + 1)) - 1;
if (w->sy <= used)
continue;
lcchild = TAILQ_LAST(&lccolumn->cells, layout_cells);
layout_resize_adjust(w, lcchild, LAYOUT_TOPBOTTOM,
w->sy - used);
}
/* Adjust the last column width to fit if necessary. */
used = mainwidth + (columns * width) + columns - 1;
if (w->sx > used) {
lccolumn = TAILQ_LAST(&lc->cells, layout_cells);
layout_resize_adjust(w, lccolumn, LAYOUT_LEFTRIGHT,
w->sx - used);
}
/* Fix cell offsets. */
layout_fix_offsets(lc);
layout_fix_panes(w);
layout_print_cell(w->layout_root, __func__, 1);
notify_window("window-layout-changed", w);
server_redraw_window(w);
}
void
layout_set_tiled(struct window *w)
{
struct window_pane *wp;
struct layout_cell *lc, *lcrow, *lcchild;
u_int n, width, height, used;
u_int i, j, columns, rows;
layout_print_cell(w->layout_root, __func__, 1);
/* Get number of panes. */
n = window_count_panes(w);
if (n <= 1)
return;
/* How many rows and columns are wanted? */
rows = columns = 1;
while (rows * columns < n) {
rows++;
if (rows * columns < n)
columns++;
}
/* What width and height should they be? */
width = (w->sx - (columns - 1)) / columns;
if (width < PANE_MINIMUM)
width = PANE_MINIMUM;
height = (w->sy - (rows - 1)) / rows;
if (height < PANE_MINIMUM)
height = PANE_MINIMUM;
/* Free old tree and create a new root. */
layout_free(w);
lc = w->layout_root = layout_create_cell(NULL);
layout_set_size(lc, (width + 1) * columns - 1,
(height + 1) * rows - 1, 0, 0);
layout_make_node(lc, LAYOUT_TOPBOTTOM);
/* Create a grid of the cells. */
wp = TAILQ_FIRST(&w->panes);
for (j = 0; j < rows; j++) {
/* If this is the last cell, all done. */
if (wp == NULL)
break;
/* Create the new row. */
lcrow = layout_create_cell(lc);
layout_set_size(lcrow, w->sx, height, 0, 0);
TAILQ_INSERT_TAIL(&lc->cells, lcrow, entry);
/* If only one column, just use the row directly. */
if (n - (j * columns) == 1 || columns == 1) {
layout_make_leaf(lcrow, wp);
wp = TAILQ_NEXT(wp, entry);
continue;
}
/* Add in the columns. */
layout_make_node(lcrow, LAYOUT_LEFTRIGHT);
for (i = 0; i < columns; i++) {
/* Create and add a pane cell. */
lcchild = layout_create_cell(lcrow);
layout_set_size(lcchild, width, height, 0, 0);
layout_make_leaf(lcchild, wp);
TAILQ_INSERT_TAIL(&lcrow->cells, lcchild, entry);
/* Move to the next cell. */
if ((wp = TAILQ_NEXT(wp, entry)) == NULL)
break;
}
/*
* Adjust the row and columns to fit the full width if
* necessary.
*/
if (i == columns)
i--;
used = ((i + 1) * (width + 1)) - 1;
if (w->sx <= used)
continue;
lcchild = TAILQ_LAST(&lcrow->cells, layout_cells);
layout_resize_adjust(w, lcchild, LAYOUT_LEFTRIGHT,
w->sx - used);
}
/* Adjust the last row height to fit if necessary. */
used = (rows * height) + rows - 1;
if (w->sy > used) {
lcrow = TAILQ_LAST(&lc->cells, layout_cells);
layout_resize_adjust(w, lcrow, LAYOUT_TOPBOTTOM,
w->sy - used);
}
/* Fix cell offsets. */
layout_fix_offsets(lc);
layout_fix_panes(w);
layout_print_cell(w->layout_root, __func__, 1);
notify_window("window-layout-changed", w);
server_redraw_window(w);
}
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