/src/tmux/cmd-resize-pane.c

Source
/* $OpenBSD: cmd-resize-pane.c,v 1.70 2026/10/02 12:48:52 nicm Exp $ */

/*
 * 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 <ctype.h>
#include <stdlib.h>
#include <string.h>

#include "tmux.h"

/*
 * Increase or decrease pane size.
 */

static enum cmd_retval  cmd_resize_pane_exec(struct cmd *, struct cmdq_item *);

static enum cmd_retval  cmd_resize_pane_mouse_update(struct cmd *,
          struct cmdq_item *);
static void   cmd_resize_pane_mouse_resize_move_floating(
          struct client *, struct mouse_event *);
static void   cmd_resize_pane_mouse_resize_tiled(struct client *,
          struct mouse_event *);

const struct cmd_entry cmd_resize_pane_entry = {
  .name = "resize-pane",
  .alias = "resizep",

  .args = { "D::L::MR::Tt:U::x:y:Z", 0, 1, NULL },
  .usage = "[-MTZ] [-D lines] [-L columns] [-R columns] [-U lines] "
     "[-x width] [-y height] " CMD_TARGET_PANE_USAGE,

  .target = { 't', CMD_FIND_PANE, 0 },

  .flags = CMD_AFTERHOOK,
  .exec = cmd_resize_pane_exec
};

static enum cmd_retval
cmd_resize_pane_exec(struct cmd *self, struct cmdq_item *item)
{
  struct args   *args = cmd_get_args(self);
  struct cmd_find_state *target = cmdq_get_target(item);
  struct window_pane  *wp = target->wp;
  struct winlink    *wl = target->wl;
  struct window   *w = wl->window;
  struct layout_cell  *lc = wp->layout_cell;
  enum layout_type   type;
  const char    *errstr, *argval;
  const char     flags[4] = { 'U', 'D', 'L', 'R' };
  char      *cause = NULL, flag;
  int      adjust, x, y, status, opposite = 0;
  long unsigned    i;
  struct grid   *gd = wp->base.grid;

  if (args_has(args, 'T')) {
    if (!TAILQ_EMPTY(&wp->modes))
      return (CMD_RETURN_NORMAL);
    adjust = screen_size_y(&wp->base) - 1 - wp->base.cy;
    if (adjust > (int)gd->hsize)
      adjust = gd->hsize;
    grid_remove_history(gd, adjust);
    wp->base.cy += adjust;
    wp->flags |= PANE_REDRAW;
    return (CMD_RETURN_NORMAL);
  }

  if (args_has(args, 'M'))
    return (cmd_resize_pane_mouse_update(self, item));

  if (args_has(args, 'Z')) {
    if (w->flags & WINDOW_ZOOMED)
      window_unzoom(w, 1);
    else
      window_zoom(wp);
    server_redraw_window(w);
    return (CMD_RETURN_NORMAL);
  }
  if (!window_pane_is_floating(wp))
    server_unzoom_window(w);
  lc = wp->layout_cell; /* may have been replaced by unzoom */

  if (args_has(args, 'x')) {
    x = args_percentage(args, 'x', 0, PANE_MAXIMUM, w->sx, &cause);
    if (cause != NULL) {
      cmdq_error(item, "width %s", cause);
      free(cause);
      return (CMD_RETURN_ERROR);
    }
    if (window_pane_is_floating(wp)) {
      if (layout_resize_floating_pane_to(wp, LAYOUT_LEFTRIGHT,
          x, &cause) != 0) {
        cmdq_error(item, "size %s", cause);
        free(cause);
        return (CMD_RETURN_ERROR);
      }
    } else
      layout_resize_pane_to(wp, LAYOUT_LEFTRIGHT, x);
  }
  if (args_has(args, 'y')) {
    y = args_percentage(args, 'y', 0, PANE_MAXIMUM, w->sy, &cause);
    if (cause != NULL) {
      cmdq_error(item, "height %s", cause);
      free(cause);
      return (CMD_RETURN_ERROR);
    }
    status = window_get_pane_status(w);
    switch (status) {
    case PANE_STATUS_TOP:
      if (y != INT_MAX && wp->yoff == 1)
        y++;
      break;
    case PANE_STATUS_BOTTOM:
      if (y != INT_MAX && wp->yoff + wp->sy == w->sy - 1)
        y++;
      break;
    }
    if (window_pane_is_floating(wp)) {
      if (layout_resize_floating_pane_to(wp, LAYOUT_TOPBOTTOM,
          y, &cause) != 0) {
        cmdq_error(item, "size %s", cause);
        free(cause);
        return (CMD_RETURN_ERROR);
      }
    } else
      layout_resize_pane_to(wp, LAYOUT_TOPBOTTOM, y);
  }

  for (i = 0; i < nitems(flags); i++) {
    flag = flags[i];
    if (!args_has(args, flag))
      continue;

    argval = args_get(args, flag);
    if (argval == NULL) {
      if (args_count(args) == 0)
        argval = "1";
      else
        argval = args_string(args, 0);
    }

    adjust = strtonum(argval, INT_MIN, INT_MAX, &errstr);
    if (errstr != NULL) {
      cmdq_error(item, "adjustment %s", errstr);
      return (CMD_RETURN_ERROR);
    }

    type = LAYOUT_TOPBOTTOM;
    if (flag == 'L' || flag == 'R')
      type = LAYOUT_LEFTRIGHT;

    if (window_pane_is_floating(wp)) {
      if (flag == 'L' || flag == 'U')
        opposite = 1;

      if (layout_resize_floating_pane(wp, type, adjust,
          opposite, &cause) != 0) {
        cmdq_error(item, "adjustment %s", cause);
        free(cause);
        return (CMD_RETURN_ERROR);
      }
    } else {
      if (flag == 'L' || flag == 'U')
        adjust = -adjust;
      layout_resize_pane(wp, type, adjust, 1);
    }
  }

  if (lc->parent != NULL)
    layout_fix_offsets(w);
  layout_fix_panes(w, NULL);
  events_fire_window("window-layout-changed", w);
  server_redraw_window(w);

  return (CMD_RETURN_NORMAL);
}

static enum cmd_retval
cmd_resize_pane_mouse_update(__unused struct cmd *self, struct cmdq_item *item)
{
  struct cmd_find_state *target = cmdq_get_target(item);
  struct key_event  *event = cmdq_get_event(item);
  struct window_pane  *wp = target->wp;
  struct winlink    *wl = target->wl;
  struct window   *w = wl->window;
  struct client   *c = cmdq_get_client(item);
  struct session    *s = target->s;

  if (!event->m.valid)
    return (CMD_RETURN_NORMAL);
  wp = cmd_mouse_pane(&event->m, &s, NULL);
  if (wp == NULL || c == NULL || c->session != s)
    return (CMD_RETURN_NORMAL);

  if (!window_pane_is_floating(wp)) {
    c->tty.mouse_drag_update = cmd_resize_pane_mouse_resize_tiled;
    cmd_resize_pane_mouse_resize_tiled(c, &event->m);
    return (CMD_RETURN_NORMAL);
  }

  window_redraw_active_switch(w, wp);
  window_set_active_pane(w, wp, 1);

  c->tty.mouse_drag_update = cmd_resize_pane_mouse_resize_move_floating;
  cmd_resize_pane_mouse_resize_move_floating(c, &event->m);
  return (CMD_RETURN_NORMAL);
}

/*
 * Resizes or moves the pane by dragging. Resize a floating pane by dragging
 * the borders or corners. Grabbing an edge only resizes that axis (special
 * case). Moves the pane if dragging the top border. Since characters are
 * generally rectangular, to make it easier to grab the corner, the character
 * next to the corner is also considered the corner.
 */
static void
cmd_resize_pane_mouse_resize_move_floating(struct client *c,
    struct mouse_event *m)
{
  struct winlink    *wl;
  struct window   *w;
  struct window_pane  *wp;
  struct layout_cell  *lc;
  int      y, ly, x, lx, sx, sy, new_sx, new_sy;
  int      left, right, resizes = 0;
  int      new_xoff, new_yoff, old_xoff, old_yoff;

  wp = cmd_mouse_pane(m, NULL, &wl);
  if (wp == NULL) {
    c->tty.mouse_drag_update = NULL;
    return;
  }
  w = wl->window;
  lc = wp->layout_cell;
  sx = wp->sx;
  sy = wp->sy;
  old_xoff = wp->xoff;
  old_yoff = wp->yoff;
  left = wp->xoff - 1;
  right = wp->xoff + sx;
  if (window_pane_scrollbar_reserve(wp) &&
      w->sb_pos == PANE_SCROLLBARS_LEFT) {
    left -= wp->scrollbar_style.width + wp->scrollbar_style.pad;
  } else if (window_pane_scrollbar_reserve(wp) &&
      w->sb_pos == PANE_SCROLLBARS_RIGHT) {
    right += wp->scrollbar_style.width + wp->scrollbar_style.pad;
  }

  y = m->y + m->oy; x = m->x + m->ox;
  if (m->statusat == 0 && y >= (int)m->statuslines)
    y -= m->statuslines;
  else if (m->statusat > 0 && y >= m->statusat)
    y = m->statusat - 1;
  ly = m->ly + m->oy; lx = m->lx + m->ox;
  if (m->statusat == 0 && ly >= (int)m->statuslines)
    ly -= m->statuslines;
  else if (m->statusat > 0 && ly >= m->statusat)
    ly = m->statusat - 1;

  if ((lx == left || lx == left + 1) && ly == wp->yoff - 1) {
    /* Top left corner. */
    new_sx = lc->g.sx + (lx - x);
    if (new_sx < PANE_MINIMUM)
      new_sx = PANE_MINIMUM;
    new_sy = lc->g.sy + (ly - y);
    if (new_sy < PANE_MINIMUM)
      new_sy = PANE_MINIMUM;
    new_xoff = x + 1; /* because mouse is on border at xoff - 1 */
    new_yoff = y + 1;
    layout_set_size(lc, new_sx, new_sy, new_xoff, new_yoff);
    resizes++;
  } else if ((lx == right + 1 || lx == right) &&
      ly == wp->yoff - 1) {
    /* Top right corner. */
    new_sx = x - lc->g.xoff;
    if (new_sx < PANE_MINIMUM)
      new_sx = PANE_MINIMUM;
    new_sy = lc->g.sy + (ly - y);
    if (new_sy < PANE_MINIMUM)
      new_sy = PANE_MINIMUM;
    new_yoff = y + 1;
    layout_set_size(lc, new_sx, new_sy, lc->g.xoff, new_yoff);
    resizes++;
  } else if ((lx == left || lx == left + 1) &&
      ly == wp->yoff + sy) {
    /* Bottom left corner. */
    new_sx = lc->g.sx + (lx - x);
    if (new_sx < PANE_MINIMUM)
      new_sx = PANE_MINIMUM;
    new_sy = y - lc->g.yoff;
    if (new_sy < PANE_MINIMUM)
      return;
    new_xoff = x + 1;
    layout_set_size(lc, new_sx, new_sy, new_xoff, lc->g.yoff);
    resizes++;
  } else if ((lx == right + 1 || lx == right) &&
      ly == wp->yoff + sy) {
    /* Bottom right corner. */
    new_sx = x - lc->g.xoff;
    if (new_sx < PANE_MINIMUM)
      new_sx = PANE_MINIMUM;
    new_sy = y - lc->g.yoff;
    if (new_sy < PANE_MINIMUM)
      new_sy = PANE_MINIMUM;
    layout_set_size(lc, new_sx, new_sy, lc->g.xoff, lc->g.yoff);
    resizes++;
  } else if (lx == right) {
    /* Right border. */
    new_sx = x - lc->g.xoff;
    if (new_sx < PANE_MINIMUM)
      return;
    layout_set_size(lc, new_sx, lc->g.sy, lc->g.xoff, lc->g.yoff);
    resizes++;
  } else if (lx == left) {
    /* Left border. */
    new_sx = lc->g.sx + (lx - x);
    if (new_sx < PANE_MINIMUM)
      return;
    new_xoff = x + 1;
    layout_set_size(lc, new_sx, lc->g.sy, new_xoff, lc->g.yoff);
    resizes++;
  } else if (ly == wp->yoff + sy) {
    /* Bottom border. */
    new_sy = y - lc->g.yoff;
    if (new_sy < PANE_MINIMUM)
      return;
    layout_set_size(lc, lc->g.sx, new_sy, lc->g.xoff, lc->g.yoff);
    resizes++;
  } else if (ly == wp->yoff - 1) {
    /* Top border (move instead of resize). */
    new_xoff = lc->g.xoff + (x - lx);
    new_yoff = y + 1;
    layout_set_size(lc, lc->g.sx, lc->g.sy, new_xoff, new_yoff);
    resizes++;
  }
  if (resizes != 0) {
    layout_fix_panes(w, NULL);
    window_redraw_floating_pane(wp, old_xoff, old_yoff, sx, sy);
    server_redraw_window_borders(w);
  }
}

static void
cmd_resize_pane_mouse_resize_tiled(struct client *c, struct mouse_event *m)
{
  struct winlink    *wl;
  struct window   *w;
  u_int      y, ly, x, lx;
  static const int   offsets[][2] = {
      { 0, 0 }, { 0, 1 }, { 1, 0 }, { 0, -1 }, { -1, 0 },
  };
  struct layout_cell  *cells[nitems(offsets)], *lc;
  u_int      ncells = 0, i, j, resizes = 0;
  enum layout_type   type;

  wl = cmd_mouse_window(m, NULL);
  if (wl == NULL) {
    c->tty.mouse_drag_update = NULL;
    return;
  }
  w = wl->window;

  y = m->y + m->oy; x = m->x + m->ox;
  if (m->statusat == 0 && y >= m->statuslines)
    y -= m->statuslines;
  else if (m->statusat > 0 && y >= (u_int)m->statusat)
    y = m->statusat - 1;
  ly = m->ly + m->oy; lx = m->lx + m->ox;
  if (m->statusat == 0 && ly >= m->statuslines)
    ly -= m->statuslines;
  else if (m->statusat > 0 && ly >= (u_int)m->statusat)
    ly = m->statusat - 1;

  for (i = 0; i < nitems(cells); i++) {
    lc = layout_search_by_border(w->layout_root, lx + offsets[i][0],
        ly + offsets[i][1]);
    if (lc == NULL)
      continue;

    for (j = 0; j < ncells; j++) {
      if (cells[j] == lc) {
        lc = NULL;
        break;
      }
    }
    if (lc == NULL)
      continue;

    cells[ncells] = lc;
    ncells++;
  }
  if (ncells == 0)
    return;

  for (i = 0; i < ncells; i++) {
    type = cells[i]->parent->type;
    if (y != ly && type == LAYOUT_TOPBOTTOM) {
      layout_resize_layout(w, cells[i], type, y - ly, 0);
      resizes++;
    } else if (x != lx && type == LAYOUT_LEFTRIGHT) {
      layout_resize_layout(w, cells[i], type, x - lx, 0);
      resizes++;
    }
  }
  if (resizes != 0)
    server_redraw_window(w);
}

Coverage Report

Created: 2026-10-05 06:03

Line	Count	Source
1		/* $OpenBSD: cmd-resize-pane.c,v 1.70 2026/10/02 12:48:52 nicm Exp $ */
2
3		/*
4		* Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
5		*
6		* Permission to use, copy, modify, and distribute this software for any
7		* purpose with or without fee is hereby granted, provided that the above
8		* copyright notice and this permission notice appear in all copies.
9		*
10		* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11		* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12		* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13		* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14		* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15		* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16		* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17		*/
18
19		#include <sys/types.h>
20
21		#include <ctype.h>
22		#include <stdlib.h>
23		#include <string.h>
24
25		#include "tmux.h"
26
27		/*
28		* Increase or decrease pane size.
29		*/
30
31		static enum cmd_retval cmd_resize_pane_exec(struct cmd , struct cmdq_item );
32
33		static enum cmd_retval cmd_resize_pane_mouse_update(struct cmd *,
34		struct cmdq_item *);
35		static void cmd_resize_pane_mouse_resize_move_floating(
36		struct client , struct mouse_event );
37		static void cmd_resize_pane_mouse_resize_tiled(struct client *,
38		struct mouse_event *);
39
40		const struct cmd_entry cmd_resize_pane_entry = {
41		.name = "resize-pane",
42		.alias = "resizep",
43
44		.args = { "D::L::MR::Tt:U::x:y:Z", 0, 1, NULL },
45		.usage = "[-MTZ] [-D lines] [-L columns] [-R columns] [-U lines] "
46		"[-x width] [-y height] " CMD_TARGET_PANE_USAGE,
47
48		.target = { 't', CMD_FIND_PANE, 0 },
49
50		.flags = CMD_AFTERHOOK,
51		.exec = cmd_resize_pane_exec
52		};
53
54		static enum cmd_retval
55		cmd_resize_pane_exec(struct cmd self, struct cmdq_item item)
56	0	{
57	0	struct args *args = cmd_get_args(self);
58	0	struct cmd_find_state *target = cmdq_get_target(item);
59	0	struct window_pane *wp = target->wp;
60	0	struct winlink *wl = target->wl;
61	0	struct window *w = wl->window;
62	0	struct layout_cell *lc = wp->layout_cell;
63	0	enum layout_type type;
64	0	const char errstr, argval;
65	0	const char flags[4] = { 'U', 'D', 'L', 'R' };
66	0	char *cause = NULL, flag;
67	0	int adjust, x, y, status, opposite = 0;
68	0	long unsigned i;
69	0	struct grid *gd = wp->base.grid;
70
71	0	if (args_has(args, 'T')) {
72	0	if (!TAILQ_EMPTY(&wp->modes))
73	0	return (CMD_RETURN_NORMAL);
74	0	adjust = screen_size_y(&wp->base) - 1 - wp->base.cy;
75	0	if (adjust > (int)gd->hsize)
76	0	adjust = gd->hsize;
77	0	grid_remove_history(gd, adjust);
78	0	wp->base.cy += adjust;
79	0	wp->flags \|= PANE_REDRAW;
80	0	return (CMD_RETURN_NORMAL);
81	0	}
82
83	0	if (args_has(args, 'M'))
84	0	return (cmd_resize_pane_mouse_update(self, item));
85
86	0	if (args_has(args, 'Z')) {
87	0	if (w->flags & WINDOW_ZOOMED)
88	0	window_unzoom(w, 1);
89	0	else
90	0	window_zoom(wp);
91	0	server_redraw_window(w);
92	0	return (CMD_RETURN_NORMAL);
93	0	}
94	0	if (!window_pane_is_floating(wp))
95	0	server_unzoom_window(w);
96	0	lc = wp->layout_cell; /* may have been replaced by unzoom */
97
98	0	if (args_has(args, 'x')) {
99	0	x = args_percentage(args, 'x', 0, PANE_MAXIMUM, w->sx, &cause);
100	0	if (cause != NULL) {
101	0	cmdq_error(item, "width %s", cause);
102	0	free(cause);
103	0	return (CMD_RETURN_ERROR);
104	0	}
105	0	if (window_pane_is_floating(wp)) {
106	0	if (layout_resize_floating_pane_to(wp, LAYOUT_LEFTRIGHT,
107	0	x, &cause) != 0) {
108	0	cmdq_error(item, "size %s", cause);
109	0	free(cause);
110	0	return (CMD_RETURN_ERROR);
111	0	}
112	0	} else
113	0	layout_resize_pane_to(wp, LAYOUT_LEFTRIGHT, x);
114	0	}
115	0	if (args_has(args, 'y')) {
116	0	y = args_percentage(args, 'y', 0, PANE_MAXIMUM, w->sy, &cause);
117	0	if (cause != NULL) {
118	0	cmdq_error(item, "height %s", cause);
119	0	free(cause);
120	0	return (CMD_RETURN_ERROR);
121	0	}
122	0	status = window_get_pane_status(w);
123	0	switch (status) {
124	0	case PANE_STATUS_TOP:
125	0	if (y != INT_MAX && wp->yoff == 1)
126	0	y++;
127	0	break;
128	0	case PANE_STATUS_BOTTOM:
129	0	if (y != INT_MAX && wp->yoff + wp->sy == w->sy - 1)
130	0	y++;
131	0	break;
132	0	}
133	0	if (window_pane_is_floating(wp)) {
134	0	if (layout_resize_floating_pane_to(wp, LAYOUT_TOPBOTTOM,
135	0	y, &cause) != 0) {
136	0	cmdq_error(item, "size %s", cause);
137	0	free(cause);
138	0	return (CMD_RETURN_ERROR);
139	0	}
140	0	} else
141	0	layout_resize_pane_to(wp, LAYOUT_TOPBOTTOM, y);
142	0	}
143
144	0	for (i = 0; i < nitems(flags); i++) {
145	0	flag = flags[i];
146	0	if (!args_has(args, flag))
147	0	continue;
148
149	0	argval = args_get(args, flag);
150	0	if (argval == NULL) {
151	0	if (args_count(args) == 0)
152	0	argval = "1";
153	0	else
154	0	argval = args_string(args, 0);
155	0	}
156
157	0	adjust = strtonum(argval, INT_MIN, INT_MAX, &errstr);
158	0	if (errstr != NULL) {
159	0	cmdq_error(item, "adjustment %s", errstr);
160	0	return (CMD_RETURN_ERROR);
161	0	}
162
163	0	type = LAYOUT_TOPBOTTOM;
164	0	if (flag == 'L' \|\| flag == 'R')
165	0	type = LAYOUT_LEFTRIGHT;
166
167	0	if (window_pane_is_floating(wp)) {
168	0	if (flag == 'L' \|\| flag == 'U')
169	0	opposite = 1;
170
171	0	if (layout_resize_floating_pane(wp, type, adjust,
172	0	opposite, &cause) != 0) {
173	0	cmdq_error(item, "adjustment %s", cause);
174	0	free(cause);
175	0	return (CMD_RETURN_ERROR);
176	0	}
177	0	} else {
178	0	if (flag == 'L' \|\| flag == 'U')
179	0	adjust = -adjust;
180	0	layout_resize_pane(wp, type, adjust, 1);
181	0	}
182	0	}
183
184	0	if (lc->parent != NULL)
185	0	layout_fix_offsets(w);
186	0	layout_fix_panes(w, NULL);
187	0	events_fire_window("window-layout-changed", w);
188	0	server_redraw_window(w);
189
190	0	return (CMD_RETURN_NORMAL);
191	0	}
192
193		static enum cmd_retval
194		cmd_resize_pane_mouse_update(__unused struct cmd self, struct cmdq_item item)
195	0	{
196	0	struct cmd_find_state *target = cmdq_get_target(item);
197	0	struct key_event *event = cmdq_get_event(item);
198	0	struct window_pane *wp = target->wp;
199	0	struct winlink *wl = target->wl;
200	0	struct window *w = wl->window;
201	0	struct client *c = cmdq_get_client(item);
202	0	struct session *s = target->s;
203
204	0	if (!event->m.valid)
205	0	return (CMD_RETURN_NORMAL);
206	0	wp = cmd_mouse_pane(&event->m, &s, NULL);
207	0	if (wp == NULL \|\| c == NULL \|\| c->session != s)
208	0	return (CMD_RETURN_NORMAL);
209
210	0	if (!window_pane_is_floating(wp)) {
211	0	c->tty.mouse_drag_update = cmd_resize_pane_mouse_resize_tiled;
212	0	cmd_resize_pane_mouse_resize_tiled(c, &event->m);
213	0	return (CMD_RETURN_NORMAL);
214	0	}
215
216	0	window_redraw_active_switch(w, wp);
217	0	window_set_active_pane(w, wp, 1);
218
219	0	c->tty.mouse_drag_update = cmd_resize_pane_mouse_resize_move_floating;
220	0	cmd_resize_pane_mouse_resize_move_floating(c, &event->m);
221	0	return (CMD_RETURN_NORMAL);
222	0	}
223
224		/*
225		* Resizes or moves the pane by dragging. Resize a floating pane by dragging
226		* the borders or corners. Grabbing an edge only resizes that axis (special
227		* case). Moves the pane if dragging the top border. Since characters are
228		* generally rectangular, to make it easier to grab the corner, the character
229		* next to the corner is also considered the corner.
230		*/
231		static void
232		cmd_resize_pane_mouse_resize_move_floating(struct client *c,
233		struct mouse_event *m)
234	0	{
235	0	struct winlink *wl;
236	0	struct window *w;
237	0	struct window_pane *wp;
238	0	struct layout_cell *lc;
239	0	int y, ly, x, lx, sx, sy, new_sx, new_sy;
240	0	int left, right, resizes = 0;
241	0	int new_xoff, new_yoff, old_xoff, old_yoff;
242
243	0	wp = cmd_mouse_pane(m, NULL, &wl);
244	0	if (wp == NULL) {
245	0	c->tty.mouse_drag_update = NULL;
246	0	return;
247	0	}
248	0	w = wl->window;
249	0	lc = wp->layout_cell;
250	0	sx = wp->sx;
251	0	sy = wp->sy;
252	0	old_xoff = wp->xoff;
253	0	old_yoff = wp->yoff;
254	0	left = wp->xoff - 1;
255	0	right = wp->xoff + sx;
256	0	if (window_pane_scrollbar_reserve(wp) &&
257	0	w->sb_pos == PANE_SCROLLBARS_LEFT) {
258	0	left -= wp->scrollbar_style.width + wp->scrollbar_style.pad;
259	0	} else if (window_pane_scrollbar_reserve(wp) &&
260	0	w->sb_pos == PANE_SCROLLBARS_RIGHT) {
261	0	right += wp->scrollbar_style.width + wp->scrollbar_style.pad;
262	0	}
263
264	0	y = m->y + m->oy; x = m->x + m->ox;
265	0	if (m->statusat == 0 && y >= (int)m->statuslines)
266	0	y -= m->statuslines;
267	0	else if (m->statusat > 0 && y >= m->statusat)
268	0	y = m->statusat - 1;
269	0	ly = m->ly + m->oy; lx = m->lx + m->ox;
270	0	if (m->statusat == 0 && ly >= (int)m->statuslines)
271	0	ly -= m->statuslines;
272	0	else if (m->statusat > 0 && ly >= m->statusat)
273	0	ly = m->statusat - 1;
274
275	0	if ((lx == left \|\| lx == left + 1) && ly == wp->yoff - 1) {
276		/* Top left corner. */
277	0	new_sx = lc->g.sx + (lx - x);
278	0	if (new_sx < PANE_MINIMUM)
279	0	new_sx = PANE_MINIMUM;
280	0	new_sy = lc->g.sy + (ly - y);
281	0	if (new_sy < PANE_MINIMUM)
282	0	new_sy = PANE_MINIMUM;
283	0	new_xoff = x + 1; /* because mouse is on border at xoff - 1 */
284	0	new_yoff = y + 1;
285	0	layout_set_size(lc, new_sx, new_sy, new_xoff, new_yoff);
286	0	resizes++;
287	0	} else if ((lx == right + 1 \|\| lx == right) &&
288	0	ly == wp->yoff - 1) {
289		/* Top right corner. */
290	0	new_sx = x - lc->g.xoff;
291	0	if (new_sx < PANE_MINIMUM)
292	0	new_sx = PANE_MINIMUM;
293	0	new_sy = lc->g.sy + (ly - y);
294	0	if (new_sy < PANE_MINIMUM)
295	0	new_sy = PANE_MINIMUM;
296	0	new_yoff = y + 1;
297	0	layout_set_size(lc, new_sx, new_sy, lc->g.xoff, new_yoff);
298	0	resizes++;
299	0	} else if ((lx == left \|\| lx == left + 1) &&
300	0	ly == wp->yoff + sy) {
301		/* Bottom left corner. */
302	0	new_sx = lc->g.sx + (lx - x);
303	0	if (new_sx < PANE_MINIMUM)
304	0	new_sx = PANE_MINIMUM;
305	0	new_sy = y - lc->g.yoff;
306	0	if (new_sy < PANE_MINIMUM)
307	0	return;
308	0	new_xoff = x + 1;
309	0	layout_set_size(lc, new_sx, new_sy, new_xoff, lc->g.yoff);
310	0	resizes++;
311	0	} else if ((lx == right + 1 \|\| lx == right) &&
312	0	ly == wp->yoff + sy) {
313		/* Bottom right corner. */
314	0	new_sx = x - lc->g.xoff;
315	0	if (new_sx < PANE_MINIMUM)
316	0	new_sx = PANE_MINIMUM;
317	0	new_sy = y - lc->g.yoff;
318	0	if (new_sy < PANE_MINIMUM)
319	0	new_sy = PANE_MINIMUM;
320	0	layout_set_size(lc, new_sx, new_sy, lc->g.xoff, lc->g.yoff);
321	0	resizes++;
322	0	} else if (lx == right) {
323		/* Right border. */
324	0	new_sx = x - lc->g.xoff;
325	0	if (new_sx < PANE_MINIMUM)
326	0	return;
327	0	layout_set_size(lc, new_sx, lc->g.sy, lc->g.xoff, lc->g.yoff);
328	0	resizes++;
329	0	} else if (lx == left) {
330		/* Left border. */
331	0	new_sx = lc->g.sx + (lx - x);
332	0	if (new_sx < PANE_MINIMUM)
333	0	return;
334	0	new_xoff = x + 1;
335	0	layout_set_size(lc, new_sx, lc->g.sy, new_xoff, lc->g.yoff);
336	0	resizes++;
337	0	} else if (ly == wp->yoff + sy) {
338		/* Bottom border. */
339	0	new_sy = y - lc->g.yoff;
340	0	if (new_sy < PANE_MINIMUM)
341	0	return;
342	0	layout_set_size(lc, lc->g.sx, new_sy, lc->g.xoff, lc->g.yoff);
343	0	resizes++;
344	0	} else if (ly == wp->yoff - 1) {
345		/* Top border (move instead of resize). */
346	0	new_xoff = lc->g.xoff + (x - lx);
347	0	new_yoff = y + 1;
348	0	layout_set_size(lc, lc->g.sx, lc->g.sy, new_xoff, new_yoff);
349	0	resizes++;
350	0	}
351	0	if (resizes != 0) {
352	0	layout_fix_panes(w, NULL);
353	0	window_redraw_floating_pane(wp, old_xoff, old_yoff, sx, sy);
354	0	server_redraw_window_borders(w);
355	0	}
356	0	}
357
358		static void
359		cmd_resize_pane_mouse_resize_tiled(struct client c, struct mouse_event m)
360	0	{
361	0	struct winlink *wl;
362	0	struct window *w;
363	0	u_int y, ly, x, lx;
364	0	static const int offsets[][2] = {
365	0	{ 0, 0 }, { 0, 1 }, { 1, 0 }, { 0, -1 }, { -1, 0 },
366	0	};
367	0	struct layout_cell cells[nitems(offsets)], lc;
368	0	u_int ncells = 0, i, j, resizes = 0;
369	0	enum layout_type type;
370
371	0	wl = cmd_mouse_window(m, NULL);
372	0	if (wl == NULL) {
373	0	c->tty.mouse_drag_update = NULL;
374	0	return;
375	0	}
376	0	w = wl->window;
377
378	0	y = m->y + m->oy; x = m->x + m->ox;
379	0	if (m->statusat == 0 && y >= m->statuslines)
380	0	y -= m->statuslines;
381	0	else if (m->statusat > 0 && y >= (u_int)m->statusat)
382	0	y = m->statusat - 1;
383	0	ly = m->ly + m->oy; lx = m->lx + m->ox;
384	0	if (m->statusat == 0 && ly >= m->statuslines)
385	0	ly -= m->statuslines;
386	0	else if (m->statusat > 0 && ly >= (u_int)m->statusat)
387	0	ly = m->statusat - 1;
388
389	0	for (i = 0; i < nitems(cells); i++) {
390	0	lc = layout_search_by_border(w->layout_root, lx + offsets[i][0],
391	0	ly + offsets[i][1]);
392	0	if (lc == NULL)
393	0	continue;
394
395	0	for (j = 0; j < ncells; j++) {
396	0	if (cells[j] == lc) {
397	0	lc = NULL;
398	0	break;
399	0	}
400	0	}
401	0	if (lc == NULL)
402	0	continue;
403
404	0	cells[ncells] = lc;
405	0	ncells++;
406	0	}
407	0	if (ncells == 0)
408	0	return;
409
410	0	for (i = 0; i < ncells; i++) {
411	0	type = cells[i]->parent->type;
412	0	if (y != ly && type == LAYOUT_TOPBOTTOM) {
413	0	layout_resize_layout(w, cells[i], type, y - ly, 0);
414	0	resizes++;
415	0	} else if (x != lx && type == LAYOUT_LEFTRIGHT) {
416	0	layout_resize_layout(w, cells[i], type, x - lx, 0);
417	0	resizes++;
418	0	}
419	0	}
420	0	if (resizes != 0)
421	0	server_redraw_window(w);
422	0	}