/src/tmux/popup.c

Source
/* $OpenBSD$ */

/*
 * Copyright (c) 2020 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 <sys/wait.h>

#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "tmux.h"

struct popup_data {
  struct client    *c;
  struct cmdq_item   *item;
  int       flags;
  char       *title;

  struct grid_cell    border_cell;
  enum box_lines      border_lines;

  struct screen     s;
  struct grid_cell    defaults;
  struct colour_palette   palette;

  struct job     *job;
  struct input_ctx   *ictx;
  int       status;
  popup_close_cb      cb;
  void       *arg;

  struct menu    *menu;
  struct menu_data   *md;
  int       close;

  /* Current position and size. */
  u_int       px;
  u_int       py;
  u_int       sx;
  u_int       sy;

  /* Preferred position and size. */
  u_int       ppx;
  u_int       ppy;
  u_int       psx;
  u_int       psy;

  enum { OFF, MOVE, SIZE }  dragging;
  u_int       dx;
  u_int       dy;

  u_int       lx;
  u_int       ly;
  u_int       lb;
};

struct popup_editor {
  char      *path;
  popup_finish_edit_cb   cb;
  void      *arg;
};

static const struct menu_item popup_menu_items[] = {
  { "Close", 'q', NULL },
  { "#{?buffer_name,Paste #[underscore]#{buffer_name},}", 'p', NULL },
  { "", KEYC_NONE, NULL },
  { "Fill Space", 'F', NULL },
  { "Centre", 'C', NULL },
  { "", KEYC_NONE, NULL },
  { "To Horizontal Pane", 'h', NULL },
  { "To Vertical Pane", 'v', NULL },

  { NULL, KEYC_NONE, NULL }
};

static const struct menu_item popup_internal_menu_items[] = {
  { "Close", 'q', NULL },
  { "", KEYC_NONE, NULL },
  { "Fill Space", 'F', NULL },
  { "Centre", 'C', NULL },

  { NULL, KEYC_NONE, NULL }
};

static void
popup_redraw_cb(const struct tty_ctx *ttyctx)
{
  struct popup_data *pd = ttyctx->arg;

  pd->c->flags |= CLIENT_REDRAWOVERLAY;
}

static int
popup_set_client_cb(struct tty_ctx *ttyctx, struct client *c)
{
  struct popup_data *pd = ttyctx->arg;

  if (c != pd->c)
    return (0);
  if (pd->c->flags & CLIENT_REDRAWOVERLAY)
    return (0);

  ttyctx->bigger = 0;
  ttyctx->wox = 0;
  ttyctx->woy = 0;
  ttyctx->wsx = c->tty.sx;
  ttyctx->wsy = c->tty.sy;

  if (pd->border_lines == BOX_LINES_NONE) {
    ttyctx->xoff = ttyctx->rxoff = pd->px;
    ttyctx->yoff = ttyctx->ryoff = pd->py;
  } else {
    ttyctx->xoff = ttyctx->rxoff = pd->px + 1;
    ttyctx->yoff = ttyctx->ryoff = pd->py + 1;
  }

  return (1);
}

static void
popup_init_ctx_cb(struct screen_write_ctx *ctx, struct tty_ctx *ttyctx)
{
  struct popup_data *pd = ctx->arg;

  memcpy(&ttyctx->defaults, &pd->defaults, sizeof ttyctx->defaults);
  ttyctx->palette = &pd->palette;
  ttyctx->redraw_cb = popup_redraw_cb;
  ttyctx->set_client_cb = popup_set_client_cb;
  ttyctx->arg = pd;
}

static struct screen *
popup_mode_cb(__unused struct client *c, void *data, u_int *cx, u_int *cy)
{
  struct popup_data *pd = data;

  if (pd->md != NULL)
    return (menu_mode_cb(c, pd->md, cx, cy));

  if (pd->border_lines == BOX_LINES_NONE) {
    *cx = pd->px + pd->s.cx;
    *cy = pd->py + pd->s.cy;
  } else {
    *cx = pd->px + 1 + pd->s.cx;
    *cy = pd->py + 1 + pd->s.cy;
  }
  return (&pd->s);
}

/* Return parts of the input range which are not obstructed by the popup. */
static void
popup_check_cb(struct client* c, void *data, u_int px, u_int py, u_int nx,
    struct overlay_ranges *r)
{
  struct popup_data *pd = data;
  struct overlay_ranges  or[2];
  u_int      i, j, k = 0;

  if (pd->md != NULL) {
    /* Check each returned range for the menu against the popup. */
    menu_check_cb(c, pd->md, px, py, nx, r);
    for (i = 0; i < 2; i++) {
      server_client_overlay_range(pd->px, pd->py, pd->sx,
          pd->sy, r->px[i], py, r->nx[i], &or[i]);
    }

    /*
     * or has up to OVERLAY_MAX_RANGES non-overlapping ranges,
     * ordered from left to right. Collect them in the output.
     */
    for (i = 0; i < 2; i++) {
      /* Each or[i] only has 2 ranges. */
      for (j = 0; j < 2; j++) {
        if (or[i].nx[j] > 0) {
          r->px[k] = or[i].px[j];
          r->nx[k] = or[i].nx[j];
          k++;
        }
      }
    }

    /* Zero remaining ranges if any. */
    for (i = k; i < OVERLAY_MAX_RANGES; i++) {
      r->px[i] = 0;
      r->nx[i] = 0;
    }

    return;
  }

  server_client_overlay_range(pd->px, pd->py, pd->sx, pd->sy, px, py, nx,
      r);
}

static void
popup_draw_cb(struct client *c, void *data, struct screen_redraw_ctx *rctx)
{
  struct popup_data *pd = data;
  struct tty    *tty = &c->tty;
  struct screen    s;
  struct screen_write_ctx  ctx;
  u_int      i, px = pd->px, py = pd->py;
  struct colour_palette *palette = &pd->palette;
  struct grid_cell   defaults;

  screen_init(&s, pd->sx, pd->sy, 0);
  screen_write_start(&ctx, &s);
  screen_write_clearscreen(&ctx, 8);

  if (pd->border_lines == BOX_LINES_NONE) {
    screen_write_cursormove(&ctx, 0, 0, 0);
    screen_write_fast_copy(&ctx, &pd->s, 0, 0, pd->sx, pd->sy);
  } else if (pd->sx > 2 && pd->sy > 2) {
    screen_write_box(&ctx, pd->sx, pd->sy, pd->border_lines,
        &pd->border_cell, pd->title);
    screen_write_cursormove(&ctx, 1, 1, 0);
    screen_write_fast_copy(&ctx, &pd->s, 0, 0, pd->sx - 2,
        pd->sy - 2);
  }
  screen_write_stop(&ctx);

  memcpy(&defaults, &pd->defaults, sizeof defaults);
  if (defaults.fg == 8)
    defaults.fg = palette->fg;
  if (defaults.bg == 8)
    defaults.bg = palette->bg;

  if (pd->md != NULL) {
    c->overlay_check = menu_check_cb;
    c->overlay_data = pd->md;
  } else {
    c->overlay_check = NULL;
    c->overlay_data = NULL;
  }
  for (i = 0; i < pd->sy; i++) {
    tty_draw_line(tty, &s, 0, i, pd->sx, px, py + i, &defaults,
        palette);
  }
  screen_free(&s);
  if (pd->md != NULL) {
    c->overlay_check = NULL;
    c->overlay_data = NULL;
    menu_draw_cb(c, pd->md, rctx);
  }
  c->overlay_check = popup_check_cb;
  c->overlay_data = pd;
}

static void
popup_free_cb(struct client *c, void *data)
{
  struct popup_data *pd = data;
  struct cmdq_item  *item = pd->item;

  if (pd->md != NULL)
    menu_free_cb(c, pd->md);

  if (pd->cb != NULL)
    pd->cb(pd->status, pd->arg);

  if (item != NULL) {
    if (cmdq_get_client(item) != NULL &&
        cmdq_get_client(item)->session == NULL)
      cmdq_get_client(item)->retval = pd->status;
    cmdq_continue(item);
  }
  server_client_unref(pd->c);

  if (pd->job != NULL)
    job_free(pd->job);
  input_free(pd->ictx);

  screen_free(&pd->s);
  colour_palette_free(&pd->palette);

  free(pd->title);
  free(pd);
}

static void
popup_resize_cb(__unused struct client *c, void *data)
{
  struct popup_data *pd = data;
  struct tty    *tty = &c->tty;

  if (pd == NULL)
    return;
  if (pd->md != NULL)
    menu_free_cb(c, pd->md);

  /* Adjust position and size. */
  if (pd->psy > tty->sy)
    pd->sy = tty->sy;
  else
    pd->sy = pd->psy;
  if (pd->psx > tty->sx)
    pd->sx = tty->sx;
  else
    pd->sx = pd->psx;
  if (pd->ppy + pd->sy > tty->sy)
    pd->py = tty->sy - pd->sy;
  else
    pd->py = pd->ppy;
  if (pd->ppx + pd->sx > tty->sx)
    pd->px = tty->sx - pd->sx;
  else
    pd->px = pd->ppx;

  /* Avoid zero size screens. */
  if (pd->border_lines == BOX_LINES_NONE) {
    screen_resize(&pd->s, pd->sx, pd->sy, 0);
    if (pd->job != NULL)
      job_resize(pd->job, pd->sx, pd->sy );
  } else if (pd->sx > 2 && pd->sy > 2) {
    screen_resize(&pd->s, pd->sx - 2, pd->sy - 2, 0);
    if (pd->job != NULL)
      job_resize(pd->job, pd->sx - 2, pd->sy - 2);
  }
}

static void
popup_make_pane(struct popup_data *pd, enum layout_type type)
{
  struct client   *c = pd->c;
  struct session    *s = c->session;
  struct window   *w = s->curw->window;
  struct layout_cell  *lc;
  struct window_pane  *wp = w->active, *new_wp;
  u_int      hlimit;
  const char    *shell;

  window_unzoom(w, 1);

  lc = layout_split_pane(wp, type, -1, 0);
  if (lc == NULL)
    return;
  hlimit = options_get_number(s->options, "history-limit");
  new_wp = window_add_pane(wp->window, NULL, hlimit, 0);
  layout_assign_pane(lc, new_wp, 0);

  if (pd->job != NULL) {
    new_wp->fd = job_transfer(pd->job, &new_wp->pid, new_wp->tty,
        sizeof new_wp->tty);
    pd->job = NULL;
  }

  screen_set_title(&pd->s, new_wp->base.title);
  screen_free(&new_wp->base);
  memcpy(&new_wp->base, &pd->s, sizeof wp->base);
  screen_resize(&new_wp->base, new_wp->sx, new_wp->sy, 1);
  screen_init(&pd->s, 1, 1, 0);

  shell = options_get_string(s->options, "default-shell");
  if (!checkshell(shell))
    shell = _PATH_BSHELL;
  new_wp->shell = xstrdup(shell);

  window_pane_set_event(new_wp);
  window_set_active_pane(w, new_wp, 1);
  new_wp->flags |= PANE_CHANGED;

  pd->close = 1;
}

static void
popup_menu_done(__unused struct menu *menu, __unused u_int choice,
    key_code key, void *data)
{
  struct popup_data *pd = data;
  struct client   *c = pd->c;
  struct paste_buffer *pb;
  const char    *buf;
  size_t       len;

  pd->md = NULL;
  pd->menu = NULL;
  server_redraw_client(pd->c);

  switch (key) {
  case 'p':
    pb = paste_get_top(NULL);
    if (pb != NULL) {
      buf = paste_buffer_data(pb, &len);
      bufferevent_write(job_get_event(pd->job), buf, len);
    }
    break;
  case 'F':
    pd->sx = c->tty.sx;
    pd->sy = c->tty.sy;
    pd->px = 0;
    pd->py = 0;
    server_redraw_client(c);
    break;
  case 'C':
    pd->px = c->tty.sx / 2 - pd->sx / 2;
    pd->py = c->tty.sy / 2 - pd->sy / 2;
    server_redraw_client(c);
    break;
  case 'h':
    popup_make_pane(pd, LAYOUT_LEFTRIGHT);
    break;
  case 'v':
    popup_make_pane(pd, LAYOUT_TOPBOTTOM);
    break;
  case 'q':
    pd->close = 1;
    break;
  }
}

static void
popup_handle_drag(struct client *c, struct popup_data *pd,
    struct mouse_event *m)
{
  u_int px, py;

  if (!MOUSE_DRAG(m->b))
    pd->dragging = OFF;
  else if (pd->dragging == MOVE) {
    if (m->x < pd->dx)
      px = 0;
    else if (m->x - pd->dx + pd->sx > c->tty.sx)
      px = c->tty.sx - pd->sx;
    else
      px = m->x - pd->dx;
    if (m->y < pd->dy)
      py = 0;
    else if (m->y - pd->dy + pd->sy > c->tty.sy)
      py = c->tty.sy - pd->sy;
    else
      py = m->y - pd->dy;
    pd->px = px;
    pd->py = py;
    pd->dx = m->x - pd->px;
    pd->dy = m->y - pd->py;
    pd->ppx = px;
    pd->ppy = py;
    server_redraw_client(c);
  } else if (pd->dragging == SIZE) {
    if (pd->border_lines == BOX_LINES_NONE) {
      if (m->x < pd->px + 1)
        return;
      if (m->y < pd->py + 1)
        return;
    } else {
      if (m->x < pd->px + 3)
        return;
      if (m->y < pd->py + 3)
        return;
    }
    pd->sx = m->x - pd->px;
    pd->sy = m->y - pd->py;
    pd->psx = pd->sx;
    pd->psy = pd->sy;

    if (pd->border_lines == BOX_LINES_NONE) {
      screen_resize(&pd->s, pd->sx, pd->sy, 0);
      if (pd->job != NULL)
        job_resize(pd->job, pd->sx, pd->sy);
    } else {
      screen_resize(&pd->s, pd->sx - 2, pd->sy - 2, 0);
      if (pd->job != NULL)
        job_resize(pd->job, pd->sx - 2, pd->sy - 2);
    }
    server_redraw_client(c);
  }
}

static int
popup_key_cb(struct client *c, void *data, struct key_event *event)
{
  struct popup_data *pd = data;
  struct mouse_event  *m = &event->m;
  const char    *buf;
  size_t       len;
  u_int      px, py, x;
  enum { NONE, LEFT, RIGHT, TOP, BOTTOM } border = NONE;

  if (pd->md != NULL) {
    if (menu_key_cb(c, pd->md, event) == 1) {
      pd->md = NULL;
      pd->menu = NULL;
      if (pd->close)
        server_client_clear_overlay(c);
      else
        server_redraw_client(c);
    }
    return (0);
  }

  if (KEYC_IS_MOUSE(event->key)) {
    if (pd->dragging != OFF) {
      popup_handle_drag(c, pd, m);
      goto out;
    }
    if (m->x < pd->px ||
        m->x > pd->px + pd->sx - 1 ||
        m->y < pd->py ||
        m->y > pd->py + pd->sy - 1) {
      if (MOUSE_BUTTONS(m->b) == MOUSE_BUTTON_3)
        goto menu;
      return (0);
    }
    if (pd->border_lines != BOX_LINES_NONE) {
      if (m->x == pd->px)
        border = LEFT;
      else if (m->x == pd->px + pd->sx - 1)
        border = RIGHT;
      else if (m->y == pd->py)
        border = TOP;
      else if (m->y == pd->py + pd->sy - 1)
        border = BOTTOM;
    }
    if ((m->b & MOUSE_MASK_MODIFIERS) == 0 &&
        MOUSE_BUTTONS(m->b) == MOUSE_BUTTON_3 &&
        (border == LEFT || border == TOP))
        goto menu;
    if (((m->b & MOUSE_MASK_MODIFIERS) == MOUSE_MASK_META) ||
        (border != NONE && !MOUSE_DRAG(m->lb))) {
      if (!MOUSE_DRAG(m->b))
        goto out;
      if (MOUSE_BUTTONS(m->lb) == MOUSE_BUTTON_1)
        pd->dragging = MOVE;
      else if (MOUSE_BUTTONS(m->lb) == MOUSE_BUTTON_3)
        pd->dragging = SIZE;
      pd->dx = m->lx - pd->px;
      pd->dy = m->ly - pd->py;
      goto out;
    }
  }
  if ((((pd->flags & (POPUP_CLOSEEXIT|POPUP_CLOSEEXITZERO)) == 0) ||
      pd->job == NULL) &&
      (event->key == '\033' || event->key == ('c'|KEYC_CTRL)))
    return (1);
  if (pd->job == NULL && (pd->flags & POPUP_CLOSEANYKEY) &&
            !KEYC_IS_MOUSE(event->key) && !KEYC_IS_PASTE(event->key))
    return (1);
  if (pd->job != NULL) {
    if (KEYC_IS_MOUSE(event->key)) {
      /* Must be inside, checked already. */
      if (pd->border_lines == BOX_LINES_NONE) {
        px = m->x - pd->px;
        py = m->y - pd->py;
      } else {
        px = m->x - pd->px - 1;
        py = m->y - pd->py - 1;
      }
      if (!input_key_get_mouse(&pd->s, m, px, py, &buf, &len))
        return (0);
      bufferevent_write(job_get_event(pd->job), buf, len);
      return (0);
    }
    input_key(&pd->s, job_get_event(pd->job), event->key);
  }
  return (0);

menu:
  pd->menu = menu_create("");
  if (pd->flags & POPUP_INTERNAL) {
    menu_add_items(pd->menu, popup_internal_menu_items, NULL, c,
        NULL);
  } else
    menu_add_items(pd->menu, popup_menu_items, NULL, c, NULL);
  if (m->x >= (pd->menu->width + 4) / 2)
    x = m->x - (pd->menu->width + 4) / 2;
  else
    x = 0;
  pd->md = menu_prepare(pd->menu, 0, 0, NULL, x, m->y, c,
      BOX_LINES_DEFAULT, NULL, NULL, NULL, NULL, popup_menu_done, pd);
  c->flags |= CLIENT_REDRAWOVERLAY;

out:
  pd->lx = m->x;
  pd->ly = m->y;
  pd->lb = m->b;
  return (0);
}

static void
popup_job_update_cb(struct job *job)
{
  struct popup_data *pd = job_get_data(job);
  struct evbuffer   *evb = job_get_event(job)->input;
  struct client   *c = pd->c;
  struct screen   *s = &pd->s;
  void      *data = EVBUFFER_DATA(evb);
  size_t       size = EVBUFFER_LENGTH(evb);

  if (size == 0)
    return;

  if (pd->md != NULL) {
    c->overlay_check = menu_check_cb;
    c->overlay_data = pd->md;
  } else {
    c->overlay_check = NULL;
    c->overlay_data = NULL;
  }
  input_parse_screen(pd->ictx, s, popup_init_ctx_cb, pd, data, size);
  c->overlay_check = popup_check_cb;
  c->overlay_data = pd;

  evbuffer_drain(evb, size);
}

static void
popup_job_complete_cb(struct job *job)
{
  struct popup_data *pd = job_get_data(job);
  int      status;

  status = job_get_status(pd->job);
  if (WIFEXITED(status))
    pd->status = WEXITSTATUS(status);
  else if (WIFSIGNALED(status))
    pd->status = WTERMSIG(status);
  else
    pd->status = 0;
  pd->job = NULL;

  if ((pd->flags & POPUP_CLOSEEXIT) ||
      ((pd->flags & POPUP_CLOSEEXITZERO) && pd->status == 0))
    server_client_clear_overlay(pd->c);
}

int
popup_present(struct client *c)
{
  return (c->overlay_draw == popup_draw_cb);
}

int
popup_modify(struct client *c, const char *title, const char *style,
  const char *border_style, enum box_lines lines, int flags)
{
  struct popup_data   *pd = c->overlay_data;
  struct style    sytmp;

  if (title != NULL) {
    if (pd->title != NULL)
      free(pd->title);
    pd->title = xstrdup(title);
  }
  if (border_style != NULL) {
    style_set(&sytmp, &pd->border_cell);
    if (style_parse(&sytmp, &pd->border_cell, border_style) == 0) {
      pd->border_cell.fg = sytmp.gc.fg;
      pd->border_cell.bg = sytmp.gc.bg;
    }
  }
  if (style != NULL) {
    style_set(&sytmp, &pd->defaults);
    if (style_parse(&sytmp, &pd->defaults, style) == 0) {
      pd->defaults.fg = sytmp.gc.fg;
      pd->defaults.bg = sytmp.gc.bg;
    }
  }
  if (lines != BOX_LINES_DEFAULT) {
    if (lines == BOX_LINES_NONE && pd->border_lines != lines) {
      screen_resize(&pd->s, pd->sx, pd->sy, 1);
      job_resize(pd->job, pd->sx, pd->sy);
    } else if (pd->border_lines == BOX_LINES_NONE && pd->border_lines != lines) {
      screen_resize(&pd->s, pd->sx - 2, pd->sy - 2, 1);
      job_resize(pd->job, pd->sx - 2, pd->sy - 2);
    }
    pd->border_lines = lines;
    tty_resize(&c->tty);
  }
  if (flags != -1)
    pd->flags = flags;

  server_redraw_client(c);
  return (0);
}

int
popup_display(int flags, enum box_lines lines, struct cmdq_item *item, u_int px,
    u_int py, u_int sx, u_int sy, struct environ *env, const char *shellcmd,
    int argc, char **argv, const char *cwd, const char *title, struct client *c,
    struct session *s, const char *style, const char *border_style,
    popup_close_cb cb, void *arg)
{
  struct popup_data *pd;
  u_int      jx, jy;
  struct options    *o;
  struct style     sytmp;

  if (s != NULL)
    o = s->curw->window->options;
  else
    o = c->session->curw->window->options;

  if (lines == BOX_LINES_DEFAULT)
    lines = options_get_number(o, "popup-border-lines");
  if (lines == BOX_LINES_NONE) {
    if (sx < 1 || sy < 1)
      return (-1);
    jx = sx;
    jy = sy;
  } else {
    if (sx < 3 || sy < 3)
      return (-1);
    jx = sx - 2;
    jy = sy - 2;
  }
  if (c->tty.sx < sx || c->tty.sy < sy)
    return (-1);

  pd = xcalloc(1, sizeof *pd);
  pd->item = item;
  pd->flags = flags;
  if (title != NULL)
    pd->title = xstrdup(title);

  pd->c = c;
  pd->c->references++;

  pd->cb = cb;
  pd->arg = arg;
  pd->status = 128 + SIGHUP;

  pd->border_lines = lines;
  memcpy(&pd->border_cell, &grid_default_cell, sizeof pd->border_cell);
  style_apply(&pd->border_cell, o, "popup-border-style", NULL);
  if (border_style != NULL) {
    style_set(&sytmp, &grid_default_cell);
    if (style_parse(&sytmp, &pd->border_cell, border_style) == 0) {
      pd->border_cell.fg = sytmp.gc.fg;
      pd->border_cell.bg = sytmp.gc.bg;
    }
  }
  pd->border_cell.attr = 0;

  screen_init(&pd->s, jx, jy, 0);
  screen_set_default_cursor(&pd->s, global_w_options);
  colour_palette_init(&pd->palette);
  colour_palette_from_option(&pd->palette, global_w_options);

  memcpy(&pd->defaults, &grid_default_cell, sizeof pd->defaults);
  style_apply(&pd->defaults, o, "popup-style", NULL);
  if (style != NULL) {
    style_set(&sytmp, &grid_default_cell);
    if (style_parse(&sytmp, &pd->defaults, style) == 0) {
      pd->defaults.fg = sytmp.gc.fg;
      pd->defaults.bg = sytmp.gc.bg;
    }
  }
  pd->defaults.attr = 0;

  pd->px = px;
  pd->py = py;
  pd->sx = sx;
  pd->sy = sy;

  pd->ppx = px;
  pd->ppy = py;
  pd->psx = sx;
  pd->psy = sy;

  pd->job = job_run(shellcmd, argc, argv, env, s, cwd,
      popup_job_update_cb, popup_job_complete_cb, NULL, pd,
      JOB_NOWAIT|JOB_PTY|JOB_KEEPWRITE|JOB_DEFAULTSHELL, jx, jy);
  pd->ictx = input_init(NULL, job_get_event(pd->job), &pd->palette);

  server_client_set_overlay(c, 0, popup_check_cb, popup_mode_cb,
      popup_draw_cb, popup_key_cb, popup_free_cb, popup_resize_cb, pd);
  return (0);
}

static void
popup_editor_free(struct popup_editor *pe)
{
  unlink(pe->path);
  free(pe->path);
  free(pe);
}

static void
popup_editor_close_cb(int status, void *arg)
{
  struct popup_editor *pe = arg;
  FILE      *f;
  char      *buf = NULL;
  off_t      len = 0;

  if (status != 0) {
    pe->cb(NULL, 0, pe->arg);
    popup_editor_free(pe);
    return;
  }

  f = fopen(pe->path, "r");
  if (f != NULL) {
    fseeko(f, 0, SEEK_END);
    len = ftello(f);
    fseeko(f, 0, SEEK_SET);

    if (len == 0 ||
        (uintmax_t)len > (uintmax_t)SIZE_MAX ||
        (buf = malloc(len)) == NULL ||
        fread(buf, len, 1, f) != 1) {
      free(buf);
      buf = NULL;
      len = 0;
    }
    fclose(f);
  }
  pe->cb(buf, len, pe->arg); /* callback now owns buffer */
  popup_editor_free(pe);
}

int
popup_editor(struct client *c, const char *buf, size_t len,
    popup_finish_edit_cb cb, void *arg)
{
  struct popup_editor *pe;
  int      fd;
  FILE      *f;
  char      *cmd;
  char       path[] = _PATH_TMP "tmux.XXXXXXXX";
  const char    *editor;
  u_int      px, py, sx, sy;

  editor = options_get_string(global_options, "editor");
  if (*editor == '\0')
    return (-1);

  fd = mkstemp(path);
  if (fd == -1)
    return (-1);
  f = fdopen(fd, "w");
  if (f == NULL)
    return (-1);
  if (fwrite(buf, len, 1, f) != 1) {
    fclose(f);
    return (-1);
  }
  fclose(f);

  pe = xcalloc(1, sizeof *pe);
  pe->path = xstrdup(path);
  pe->cb = cb;
  pe->arg = arg;

  sx = c->tty.sx * 9 / 10;
  sy = c->tty.sy * 9 / 10;
  px = (c->tty.sx / 2) - (sx / 2);
  py = (c->tty.sy / 2) - (sy / 2);

  xasprintf(&cmd, "%s %s", editor, path);
  if (popup_display(POPUP_INTERNAL|POPUP_CLOSEEXIT, BOX_LINES_DEFAULT,
      NULL, px, py, sx, sy, NULL, cmd, 0, NULL, _PATH_TMP, NULL, c, NULL,
      NULL, NULL, popup_editor_close_cb, pe) != 0) {
    popup_editor_free(pe);
    free(cmd);
    return (-1);
  }
  free(cmd);
  return (0);
}

Coverage Report

Created: 2025-11-19 06:37