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

Source
/* $OpenBSD: cmd-resize-pane.c,v 1.72 2026/10/16 07:59:06 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",
  .description = "Resize or zoom a 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;
  if (m->sideat == 0 && x >= (int)m->sidewidth)
    x -= m->sidewidth;
  else if (m->sideat > 0 && x >= m->sideat)
    x = m->sideat - 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 (m->sideat == 0 && lx >= (int)m->sidewidth)
    lx -= m->sidewidth;
  else if (m->sideat > 0 && lx >= m->sideat)
    lx = m->sideat - 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;
  if (m->sideat == 0 && x >= m->sidewidth)
    x -= m->sidewidth;
  else if (m->sideat > 0 && x >= (u_int)m->sideat)
    x = m->sideat - 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;
  if (m->sideat == 0 && lx >= m->sidewidth)
    lx -= m->sidewidth;
  else if (m->sideat > 0 && lx >= (u_int)m->sideat)
    lx = m->sideat - 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: 2026-10-17 06:18

Line	Count	Source
1		/* $OpenBSD: cmd-resize-pane.c,v 1.72 2026/10/16 07:59:06 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		.description = "Resize or zoom a pane.",
43		.alias = "resizep",
44
45		.args = { "D::L::MR::Tt:U::x:y:Z", 0, 1, NULL },
46		.usage = "[-MTZ] [-D lines] [-L columns] [-R columns] [-U lines] "
47		"[-x width] [-y height] " CMD_TARGET_PANE_USAGE,
48
49		.target = { 't', CMD_FIND_PANE, 0 },
50
51		.flags = CMD_AFTERHOOK,
52		.exec = cmd_resize_pane_exec
53		};
54
55		static enum cmd_retval
56		cmd_resize_pane_exec(struct cmd self, struct cmdq_item item)
57	0	{
58	0	struct args *args = cmd_get_args(self);
59	0	struct cmd_find_state *target = cmdq_get_target(item);
60	0	struct window_pane *wp = target->wp;
61	0	struct winlink *wl = target->wl;
62	0	struct window *w = wl->window;
63	0	struct layout_cell *lc = wp->layout_cell;
64	0	enum layout_type type;
65	0	const char errstr, argval;
66	0	const char flags[4] = { 'U', 'D', 'L', 'R' };
67	0	char *cause = NULL, flag;
68	0	int adjust, x, y, status, opposite = 0;
69	0	long unsigned i;
70	0	struct grid *gd = wp->base.grid;
71
72	0	if (args_has(args, 'T')) {
73	0	if (!TAILQ_EMPTY(&wp->modes))
74	0	return (CMD_RETURN_NORMAL);
75	0	adjust = screen_size_y(&wp->base) - 1 - wp->base.cy;
76	0	if (adjust > (int)gd->hsize)
77	0	adjust = gd->hsize;
78	0	grid_remove_history(gd, adjust);
79	0	wp->base.cy += adjust;
80	0	wp->flags \|= PANE_REDRAW;
81	0	return (CMD_RETURN_NORMAL);
82	0	}
83
84	0	if (args_has(args, 'M'))
85	0	return (cmd_resize_pane_mouse_update(self, item));
86
87	0	if (args_has(args, 'Z')) {
88	0	if (w->flags & WINDOW_ZOOMED)
89	0	window_unzoom(w, 1);
90	0	else
91	0	window_zoom(wp);
92	0	server_redraw_window(w);
93	0	return (CMD_RETURN_NORMAL);
94	0	}
95	0	if (!window_pane_is_floating(wp))
96	0	server_unzoom_window(w);
97	0	lc = wp->layout_cell; /* may have been replaced by unzoom */
98
99	0	if (args_has(args, 'x')) {
100	0	x = args_percentage(args, 'x', 0, PANE_MAXIMUM, w->sx, &cause);
101	0	if (cause != NULL) {
102	0	cmdq_error(item, "width %s", cause);
103	0	free(cause);
104	0	return (CMD_RETURN_ERROR);
105	0	}
106	0	if (window_pane_is_floating(wp)) {
107	0	if (layout_resize_floating_pane_to(wp, LAYOUT_LEFTRIGHT,
108	0	x, &cause) != 0) {
109	0	cmdq_error(item, "size %s", cause);
110	0	free(cause);
111	0	return (CMD_RETURN_ERROR);
112	0	}
113	0	} else
114	0	layout_resize_pane_to(wp, LAYOUT_LEFTRIGHT, x);
115	0	}
116	0	if (args_has(args, 'y')) {
117	0	y = args_percentage(args, 'y', 0, PANE_MAXIMUM, w->sy, &cause);
118	0	if (cause != NULL) {
119	0	cmdq_error(item, "height %s", cause);
120	0	free(cause);
121	0	return (CMD_RETURN_ERROR);
122	0	}
123	0	status = window_get_pane_status(w);
124	0	switch (status) {
125	0	case PANE_STATUS_TOP:
126	0	if (y != INT_MAX && wp->yoff == 1)
127	0	y++;
128	0	break;
129	0	case PANE_STATUS_BOTTOM:
130	0	if (y != INT_MAX && wp->yoff + wp->sy == w->sy - 1)
131	0	y++;
132	0	break;
133	0	}
134	0	if (window_pane_is_floating(wp)) {
135	0	if (layout_resize_floating_pane_to(wp, LAYOUT_TOPBOTTOM,
136	0	y, &cause) != 0) {
137	0	cmdq_error(item, "size %s", cause);
138	0	free(cause);
139	0	return (CMD_RETURN_ERROR);
140	0	}
141	0	} else
142	0	layout_resize_pane_to(wp, LAYOUT_TOPBOTTOM, y);
143	0	}
144
145	0	for (i = 0; i < nitems(flags); i++) {
146	0	flag = flags[i];
147	0	if (!args_has(args, flag))
148	0	continue;
149
150	0	argval = args_get(args, flag);
151	0	if (argval == NULL) {
152	0	if (args_count(args) == 0)
153	0	argval = "1";
154	0	else
155	0	argval = args_string(args, 0);
156	0	}
157
158	0	adjust = strtonum(argval, INT_MIN, INT_MAX, &errstr);
159	0	if (errstr != NULL) {
160	0	cmdq_error(item, "adjustment %s", errstr);
161	0	return (CMD_RETURN_ERROR);
162	0	}
163
164	0	type = LAYOUT_TOPBOTTOM;
165	0	if (flag == 'L' \|\| flag == 'R')
166	0	type = LAYOUT_LEFTRIGHT;
167
168	0	if (window_pane_is_floating(wp)) {
169	0	if (flag == 'L' \|\| flag == 'U')
170	0	opposite = 1;
171
172	0	if (layout_resize_floating_pane(wp, type, adjust,
173	0	opposite, &cause) != 0) {
174	0	cmdq_error(item, "adjustment %s", cause);
175	0	free(cause);
176	0	return (CMD_RETURN_ERROR);
177	0	}
178	0	} else {
179	0	if (flag == 'L' \|\| flag == 'U')
180	0	adjust = -adjust;
181	0	layout_resize_pane(wp, type, adjust, 1);
182	0	}
183	0	}
184
185	0	if (lc->parent != NULL)
186	0	layout_fix_offsets(w);
187	0	layout_fix_panes(w, NULL);
188	0	events_fire_window("window-layout-changed", w);
189	0	server_redraw_window(w);
190
191	0	return (CMD_RETURN_NORMAL);
192	0	}
193
194		static enum cmd_retval
195		cmd_resize_pane_mouse_update(__unused struct cmd self, struct cmdq_item item)
196	0	{
197	0	struct cmd_find_state *target = cmdq_get_target(item);
198	0	struct key_event *event = cmdq_get_event(item);
199	0	struct window_pane *wp = target->wp;
200	0	struct winlink *wl = target->wl;
201	0	struct window *w = wl->window;
202	0	struct client *c = cmdq_get_client(item);
203	0	struct session *s = target->s;
204
205	0	if (!event->m.valid)
206	0	return (CMD_RETURN_NORMAL);
207	0	wp = cmd_mouse_pane(&event->m, &s, NULL);
208	0	if (wp == NULL \|\| c == NULL \|\| c->session != s)
209	0	return (CMD_RETURN_NORMAL);
210
211	0	if (!window_pane_is_floating(wp)) {
212	0	c->tty.mouse_drag_update = cmd_resize_pane_mouse_resize_tiled;
213	0	cmd_resize_pane_mouse_resize_tiled(c, &event->m);
214	0	return (CMD_RETURN_NORMAL);
215	0	}
216
217	0	window_redraw_active_switch(w, wp);
218	0	window_set_active_pane(w, wp, 1);
219
220	0	c->tty.mouse_drag_update = cmd_resize_pane_mouse_resize_move_floating;
221	0	cmd_resize_pane_mouse_resize_move_floating(c, &event->m);
222	0	return (CMD_RETURN_NORMAL);
223	0	}
224
225		/*
226		* Resizes or moves the pane by dragging. Resize a floating pane by dragging
227		* the borders or corners. Grabbing an edge only resizes that axis (special
228		* case). Moves the pane if dragging the top border. Since characters are
229		* generally rectangular, to make it easier to grab the corner, the character
230		* next to the corner is also considered the corner.
231		*/
232		static void
233		cmd_resize_pane_mouse_resize_move_floating(struct client *c,
234		struct mouse_event *m)
235	0	{
236	0	struct winlink *wl;
237	0	struct window *w;
238	0	struct window_pane *wp;
239	0	struct layout_cell *lc;
240	0	int y, ly, x, lx, sx, sy, new_sx, new_sy;
241	0	int left, right, resizes = 0;
242	0	int new_xoff, new_yoff, old_xoff, old_yoff;
243
244	0	wp = cmd_mouse_pane(m, NULL, &wl);
245	0	if (wp == NULL) {
246	0	c->tty.mouse_drag_update = NULL;
247	0	return;
248	0	}
249	0	w = wl->window;
250	0	lc = wp->layout_cell;
251	0	sx = wp->sx;
252	0	sy = wp->sy;
253	0	old_xoff = wp->xoff;
254	0	old_yoff = wp->yoff;
255	0	left = wp->xoff - 1;
256	0	right = wp->xoff + sx;
257	0	if (window_pane_scrollbar_reserve(wp) &&
258	0	w->sb_pos == PANE_SCROLLBARS_LEFT) {
259	0	left -= wp->scrollbar_style.width + wp->scrollbar_style.pad;
260	0	} else if (window_pane_scrollbar_reserve(wp) &&
261	0	w->sb_pos == PANE_SCROLLBARS_RIGHT) {
262	0	right += wp->scrollbar_style.width + wp->scrollbar_style.pad;
263	0	}
264
265	0	y = m->y + m->oy; x = m->x + m->ox;
266	0	if (m->statusat == 0 && y >= (int)m->statuslines)
267	0	y -= m->statuslines;
268	0	else if (m->statusat > 0 && y >= m->statusat)
269	0	y = m->statusat - 1;
270	0	if (m->sideat == 0 && x >= (int)m->sidewidth)
271	0	x -= m->sidewidth;
272	0	else if (m->sideat > 0 && x >= m->sideat)
273	0	x = m->sideat - 1;
274	0	ly = m->ly + m->oy; lx = m->lx + m->ox;
275	0	if (m->statusat == 0 && ly >= (int)m->statuslines)
276	0	ly -= m->statuslines;
277	0	else if (m->statusat > 0 && ly >= m->statusat)
278	0	ly = m->statusat - 1;
279	0	if (m->sideat == 0 && lx >= (int)m->sidewidth)
280	0	lx -= m->sidewidth;
281	0	else if (m->sideat > 0 && lx >= m->sideat)
282	0	lx = m->sideat - 1;
283
284	0	if ((lx == left \|\| lx == left + 1) && ly == wp->yoff - 1) {
285		/* Top left corner. */
286	0	new_sx = lc->g.sx + (lx - x);
287	0	if (new_sx < PANE_MINIMUM)
288	0	new_sx = PANE_MINIMUM;
289	0	new_sy = lc->g.sy + (ly - y);
290	0	if (new_sy < PANE_MINIMUM)
291	0	new_sy = PANE_MINIMUM;
292	0	new_xoff = x + 1; /* because mouse is on border at xoff - 1 */
293	0	new_yoff = y + 1;
294	0	layout_set_size(lc, new_sx, new_sy, new_xoff, new_yoff);
295	0	resizes++;
296	0	} else if ((lx == right + 1 \|\| lx == right) &&
297	0	ly == wp->yoff - 1) {
298		/* Top right corner. */
299	0	new_sx = x - lc->g.xoff;
300	0	if (new_sx < PANE_MINIMUM)
301	0	new_sx = PANE_MINIMUM;
302	0	new_sy = lc->g.sy + (ly - y);
303	0	if (new_sy < PANE_MINIMUM)
304	0	new_sy = PANE_MINIMUM;
305	0	new_yoff = y + 1;
306	0	layout_set_size(lc, new_sx, new_sy, lc->g.xoff, new_yoff);
307	0	resizes++;
308	0	} else if ((lx == left \|\| lx == left + 1) &&
309	0	ly == wp->yoff + sy) {
310		/* Bottom left corner. */
311	0	new_sx = lc->g.sx + (lx - x);
312	0	if (new_sx < PANE_MINIMUM)
313	0	new_sx = PANE_MINIMUM;
314	0	new_sy = y - lc->g.yoff;
315	0	if (new_sy < PANE_MINIMUM)
316	0	return;
317	0	new_xoff = x + 1;
318	0	layout_set_size(lc, new_sx, new_sy, new_xoff, lc->g.yoff);
319	0	resizes++;
320	0	} else if ((lx == right + 1 \|\| lx == right) &&
321	0	ly == wp->yoff + sy) {
322		/* Bottom right corner. */
323	0	new_sx = x - lc->g.xoff;
324	0	if (new_sx < PANE_MINIMUM)
325	0	new_sx = PANE_MINIMUM;
326	0	new_sy = y - lc->g.yoff;
327	0	if (new_sy < PANE_MINIMUM)
328	0	new_sy = PANE_MINIMUM;
329	0	layout_set_size(lc, new_sx, new_sy, lc->g.xoff, lc->g.yoff);
330	0	resizes++;
331	0	} else if (lx == right) {
332		/* Right border. */
333	0	new_sx = x - lc->g.xoff;
334	0	if (new_sx < PANE_MINIMUM)
335	0	return;
336	0	layout_set_size(lc, new_sx, lc->g.sy, lc->g.xoff, lc->g.yoff);
337	0	resizes++;
338	0	} else if (lx == left) {
339		/* Left border. */
340	0	new_sx = lc->g.sx + (lx - x);
341	0	if (new_sx < PANE_MINIMUM)
342	0	return;
343	0	new_xoff = x + 1;
344	0	layout_set_size(lc, new_sx, lc->g.sy, new_xoff, lc->g.yoff);
345	0	resizes++;
346	0	} else if (ly == wp->yoff + sy) {
347		/* Bottom border. */
348	0	new_sy = y - lc->g.yoff;
349	0	if (new_sy < PANE_MINIMUM)
350	0	return;
351	0	layout_set_size(lc, lc->g.sx, new_sy, lc->g.xoff, lc->g.yoff);
352	0	resizes++;
353	0	} else if (ly == wp->yoff - 1) {
354		/* Top border (move instead of resize). */
355	0	new_xoff = lc->g.xoff + (x - lx);
356	0	new_yoff = y + 1;
357	0	layout_set_size(lc, lc->g.sx, lc->g.sy, new_xoff, new_yoff);
358	0	resizes++;
359	0	}
360	0	if (resizes != 0) {
361	0	layout_fix_panes(w, NULL);
362	0	window_redraw_floating_pane(wp, old_xoff, old_yoff, sx, sy);
363	0	server_redraw_window_borders(w);
364	0	}
365	0	}
366
367		static void
368		cmd_resize_pane_mouse_resize_tiled(struct client c, struct mouse_event m)
369	0	{
370	0	struct winlink *wl;
371	0	struct window *w;
372	0	u_int y, ly, x, lx;
373	0	static const int offsets[][2] = {
374	0	{ 0, 0 }, { 0, 1 }, { 1, 0 }, { 0, -1 }, { -1, 0 },
375	0	};
376	0	struct layout_cell cells[nitems(offsets)], lc;
377	0	u_int ncells = 0, i, j, resizes = 0;
378	0	enum layout_type type;
379
380	0	wl = cmd_mouse_window(m, NULL);
381	0	if (wl == NULL) {
382	0	c->tty.mouse_drag_update = NULL;
383	0	return;
384	0	}
385	0	w = wl->window;
386
387	0	y = m->y + m->oy; x = m->x + m->ox;
388	0	if (m->statusat == 0 && y >= m->statuslines)
389	0	y -= m->statuslines;
390	0	else if (m->statusat > 0 && y >= (u_int)m->statusat)
391	0	y = m->statusat - 1;
392	0	if (m->sideat == 0 && x >= m->sidewidth)
393	0	x -= m->sidewidth;
394	0	else if (m->sideat > 0 && x >= (u_int)m->sideat)
395	0	x = m->sideat - 1;
396	0	ly = m->ly + m->oy; lx = m->lx + m->ox;
397	0	if (m->statusat == 0 && ly >= m->statuslines)
398	0	ly -= m->statuslines;
399	0	else if (m->statusat > 0 && ly >= (u_int)m->statusat)
400	0	ly = m->statusat - 1;
401	0	if (m->sideat == 0 && lx >= m->sidewidth)
402	0	lx -= m->sidewidth;
403	0	else if (m->sideat > 0 && lx >= (u_int)m->sideat)
404	0	lx = m->sideat - 1;
405
406	0	for (i = 0; i < nitems(cells); i++) {
407	0	lc = layout_search_by_border(w->layout_root, lx + offsets[i][0],
408	0	ly + offsets[i][1]);
409	0	if (lc == NULL)
410	0	continue;
411
412	0	for (j = 0; j < ncells; j++) {
413	0	if (cells[j] == lc) {
414	0	lc = NULL;
415	0	break;
416	0	}
417	0	}
418	0	if (lc == NULL)
419	0	continue;
420
421	0	cells[ncells] = lc;
422	0	ncells++;
423	0	}
424	0	if (ncells == 0)
425	0	return;
426
427	0	for (i = 0; i < ncells; i++) {
428	0	type = cells[i]->parent->type;
429	0	if (y != ly && type == LAYOUT_TOPBOTTOM) {
430	0	layout_resize_layout(w, cells[i], type, y - ly, 0);
431	0	resizes++;
432	0	} else if (x != lx && type == LAYOUT_LEFTRIGHT) {
433	0	layout_resize_layout(w, cells[i], type, x - lx, 0);
434	0	resizes++;
435	0	}
436	0	}
437	0	if (resizes != 0)
438	0	server_redraw_window(w);
439	0	}