/
window.c
7795 lines (7057 loc) · 184 KB
/
window.c
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/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read a list of people who contributed.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
#include "vim.h"
static void cmd_with_count(char *cmd, char_u *bufp, size_t bufsize, long Prenum);
static void win_init(win_T *newp, win_T *oldp, int flags);
static void win_init_some(win_T *newp, win_T *oldp);
static void frame_comp_pos(frame_T *topfrp, int *row, int *col);
static void frame_setheight(frame_T *curfrp, int height);
static void frame_setwidth(frame_T *curfrp, int width);
static void win_exchange(long);
static void win_rotate(int, int);
static void win_totop(int size, int flags);
static void win_equal_rec(win_T *next_curwin, int current, frame_T *topfr, int dir, int col, int row, int width, int height);
static void trigger_winclosed(win_T *win);
static win_T *win_free_mem(win_T *win, int *dirp, tabpage_T *tp);
static frame_T *win_altframe(win_T *win, tabpage_T *tp);
static tabpage_T *alt_tabpage(void);
static win_T *frame2win(frame_T *frp);
static int frame_has_win(frame_T *frp, win_T *wp);
static void win_fix_scroll(int resize);
static void win_fix_cursor(int normal);
static void frame_new_height(frame_T *topfrp, int height, int topfirst, int wfh);
static int frame_fixed_height(frame_T *frp);
static int frame_fixed_width(frame_T *frp);
static void frame_add_statusline(frame_T *frp);
static void frame_new_width(frame_T *topfrp, int width, int leftfirst, int wfw);
static void frame_add_vsep(frame_T *frp);
static int frame_minwidth(frame_T *topfrp, win_T *next_curwin);
static void frame_fix_width(win_T *wp);
static int win_alloc_firstwin(win_T *oldwin);
static void new_frame(win_T *wp);
static tabpage_T *alloc_tabpage(void);
static int leave_tabpage(buf_T *new_curbuf, int trigger_leave_autocmds);
static void enter_tabpage(tabpage_T *tp, buf_T *old_curbuf, int trigger_enter_autocmds, int trigger_leave_autocmds);
static void frame_fix_height(win_T *wp);
static int frame_minheight(frame_T *topfrp, win_T *next_curwin);
static int may_open_tabpage(void);
static int win_enter_ext(win_T *wp, int flags);
static void win_free(win_T *wp, tabpage_T *tp);
static void win_append(win_T *after, win_T *wp);
static void frame_append(frame_T *after, frame_T *frp);
static void frame_insert(frame_T *before, frame_T *frp);
static void frame_remove(frame_T *frp);
static void win_goto_ver(int up, long count);
static void win_goto_hor(int left, long count);
static void frame_add_height(frame_T *frp, int n);
static void last_status_rec(frame_T *fr, int statusline);
static void make_snapshot_rec(frame_T *fr, frame_T **frp);
static void clear_snapshot(tabpage_T *tp, int idx);
static void clear_snapshot_rec(frame_T *fr);
static int check_snapshot_rec(frame_T *sn, frame_T *fr);
static win_T *restore_snapshot_rec(frame_T *sn, frame_T *fr);
static win_T *get_snapshot_curwin(int idx);
static int frame_check_height(frame_T *topfrp, int height);
static int frame_check_width(frame_T *topfrp, int width);
static win_T *win_alloc(win_T *after, int hidden);
#define NOWIN ((win_T *)-1) // non-existing window
#define ROWS_AVAIL (Rows - p_ch - tabline_height())
// flags for win_enter_ext()
#define WEE_UNDO_SYNC 0x01
#define WEE_CURWIN_INVALID 0x02
#define WEE_TRIGGER_NEW_AUTOCMDS 0x04
#define WEE_TRIGGER_ENTER_AUTOCMDS 0x08
#define WEE_TRIGGER_LEAVE_AUTOCMDS 0x10
#define WEE_ALLOW_PARSE_MESSAGES 0x20
static char *m_onlyone = N_("Already only one window");
// When non-zero splitting a window is forbidden. Used to avoid that nasty
// autocommands mess up the window structure.
static int split_disallowed = 0;
// When non-zero closing a window is forbidden. Used to avoid that nasty
// autocommands mess up the window structure.
static int close_disallowed = 0;
/*
* Disallow changing the window layout (split window, close window, move
* window). Resizing is still allowed.
* Used for autocommands that temporarily use another window and need to
* make sure the previously selected window is still there.
* Must be matched with exactly one call to window_layout_unlock()!
*/
static void
window_layout_lock(void)
{
++split_disallowed;
++close_disallowed;
}
static void
window_layout_unlock(void)
{
--split_disallowed;
--close_disallowed;
}
/*
* When the window layout cannot be changed give an error and return TRUE.
* "cmd" indicates the action being performed and is used to pick the relevant
* error message.
*/
int
window_layout_locked(enum CMD_index cmd)
{
if (split_disallowed > 0 || close_disallowed > 0)
{
if (close_disallowed == 0 && cmd == CMD_tabnew)
emsg(_(e_cannot_split_window_when_closing_buffer));
else
emsg(_(e_not_allowed_to_change_window_layout_in_this_autocmd));
return TRUE;
}
return FALSE;
}
// #define WIN_DEBUG
#ifdef WIN_DEBUG
/*
* Call this method to log the current window layout.
*/
static void
log_frame_layout(frame_T *frame)
{
ch_log(NULL, "layout %s, wi: %d, he: %d, wwi: %d, whe: %d, id: %d",
frame->fr_layout == FR_LEAF ? "LEAF"
: frame->fr_layout == FR_ROW ? "ROW" : "COL",
frame->fr_width,
frame->fr_height,
frame->fr_win == NULL ? -1 : frame->fr_win->w_width,
frame->fr_win == NULL ? -1 : frame->fr_win->w_height,
frame->fr_win == NULL ? -1 : frame->fr_win->w_id);
if (frame->fr_child != NULL)
{
ch_log(NULL, "children");
log_frame_layout(frame->fr_child);
if (frame->fr_next != NULL)
ch_log(NULL, "END of children");
}
if (frame->fr_next != NULL)
log_frame_layout(frame->fr_next);
}
#endif
/*
* Return the current window, unless in the cmdline window and "prevwin" is
* set, then return "prevwin".
*/
win_T *
prevwin_curwin(void)
{
// In cmdwin, the alternative buffer should be used.
return is_in_cmdwin() && prevwin != NULL ? prevwin : curwin;
}
/*
* If the 'switchbuf' option contains "useopen" or "usetab", then try to jump
* to a window containing "buf".
* Returns the pointer to the window that was jumped to or NULL.
*/
win_T *
swbuf_goto_win_with_buf(buf_T *buf)
{
win_T *wp = NULL;
if (buf == NULL)
return wp;
// If 'switchbuf' contains "useopen": jump to first window in the current
// tab page containing "buf" if one exists.
if (swb_flags & SWB_USEOPEN)
wp = buf_jump_open_win(buf);
// If 'switchbuf' contains "usetab": jump to first window in any tab page
// containing "buf" if one exists.
if (wp == NULL && (swb_flags & SWB_USETAB))
wp = buf_jump_open_tab(buf);
return wp;
}
/*
* All CTRL-W window commands are handled here, called from normal_cmd().
*/
void
do_window(
int nchar,
long Prenum,
int xchar) // extra char from ":wincmd gx" or NUL
{
long Prenum1;
win_T *wp;
char_u *ptr;
linenr_T lnum = -1;
#ifdef FEAT_FIND_ID
int type = FIND_DEFINE;
int len;
#endif
char_u cbuf[40];
if (ERROR_IF_ANY_POPUP_WINDOW)
return;
#define CHECK_CMDWIN \
do { \
if (cmdwin_type != 0) \
{ \
emsg(_(e_invalid_in_cmdline_window)); \
return; \
} \
} while (0)
Prenum1 = Prenum == 0 ? 1 : Prenum;
switch (nchar)
{
// split current window in two parts, horizontally
case 'S':
case Ctrl_S:
case 's':
CHECK_CMDWIN;
reset_VIsual_and_resel(); // stop Visual mode
// When splitting the quickfix window open a new buffer in it,
// don't replicate the quickfix buffer.
if (bt_quickfix(curbuf))
goto newwindow;
#ifdef FEAT_GUI
need_mouse_correct = TRUE;
#endif
(void)win_split((int)Prenum, 0);
break;
// split current window in two parts, vertically
case Ctrl_V:
case 'v':
CHECK_CMDWIN;
reset_VIsual_and_resel(); // stop Visual mode
// When splitting the quickfix window open a new buffer in it,
// don't replicate the quickfix buffer.
if (bt_quickfix(curbuf))
goto newwindow;
#ifdef FEAT_GUI
need_mouse_correct = TRUE;
#endif
(void)win_split((int)Prenum, WSP_VERT);
break;
// split current window and edit alternate file
case Ctrl_HAT:
case '^':
CHECK_CMDWIN;
reset_VIsual_and_resel(); // stop Visual mode
if (buflist_findnr(Prenum == 0
? curwin->w_alt_fnum : Prenum) == NULL)
{
if (Prenum == 0)
emsg(_(e_no_alternate_file));
else
semsg(_(e_buffer_nr_not_found), Prenum);
break;
}
if (!curbuf_locked() && win_split(0, 0) == OK)
(void)buflist_getfile(
Prenum == 0 ? curwin->w_alt_fnum : Prenum,
(linenr_T)0, GETF_ALT, FALSE);
break;
// open new window
case Ctrl_N:
case 'n':
CHECK_CMDWIN;
reset_VIsual_and_resel(); // stop Visual mode
newwindow:
if (Prenum)
// window height
vim_snprintf((char *)cbuf, sizeof(cbuf) - 5, "%ld", Prenum);
else
cbuf[0] = NUL;
#if defined(FEAT_QUICKFIX)
if (nchar == 'v' || nchar == Ctrl_V)
STRCAT(cbuf, "v");
#endif
STRCAT(cbuf, "new");
do_cmdline_cmd(cbuf);
break;
// quit current window
case Ctrl_Q:
case 'q':
reset_VIsual_and_resel(); // stop Visual mode
cmd_with_count("quit", cbuf, sizeof(cbuf), Prenum);
do_cmdline_cmd(cbuf);
break;
// close current window
case Ctrl_C:
case 'c':
reset_VIsual_and_resel(); // stop Visual mode
cmd_with_count("close", cbuf, sizeof(cbuf), Prenum);
do_cmdline_cmd(cbuf);
break;
#if defined(FEAT_QUICKFIX)
// close preview window
case Ctrl_Z:
case 'z':
CHECK_CMDWIN;
reset_VIsual_and_resel(); // stop Visual mode
do_cmdline_cmd((char_u *)"pclose");
break;
// cursor to preview window
case 'P':
FOR_ALL_WINDOWS(wp)
if (wp->w_p_pvw)
break;
if (wp == NULL)
emsg(_(e_there_is_no_preview_window));
else
win_goto(wp);
break;
#endif
// close all but current window
case Ctrl_O:
case 'o':
CHECK_CMDWIN;
reset_VIsual_and_resel(); // stop Visual mode
cmd_with_count("only", cbuf, sizeof(cbuf), Prenum);
do_cmdline_cmd(cbuf);
break;
// cursor to next window with wrap around
case Ctrl_W:
case 'w':
// cursor to previous window with wrap around
case 'W':
CHECK_CMDWIN;
if (ONE_WINDOW && Prenum != 1) // just one window
beep_flush();
else
{
if (Prenum) // go to specified window
{
for (wp = firstwin; --Prenum > 0; )
{
if (wp->w_next == NULL)
break;
else
wp = wp->w_next;
}
}
else
{
if (nchar == 'W') // go to previous window
{
wp = curwin->w_prev;
if (wp == NULL)
wp = lastwin; // wrap around
}
else // go to next window
{
wp = curwin->w_next;
if (wp == NULL)
wp = firstwin; // wrap around
}
}
win_goto(wp);
}
break;
// cursor to window below
case 'j':
case K_DOWN:
case Ctrl_J:
CHECK_CMDWIN;
win_goto_ver(FALSE, Prenum1);
break;
// cursor to window above
case 'k':
case K_UP:
case Ctrl_K:
CHECK_CMDWIN;
win_goto_ver(TRUE, Prenum1);
break;
// cursor to left window
case 'h':
case K_LEFT:
case Ctrl_H:
case K_BS:
CHECK_CMDWIN;
win_goto_hor(TRUE, Prenum1);
break;
// cursor to right window
case 'l':
case K_RIGHT:
case Ctrl_L:
CHECK_CMDWIN;
win_goto_hor(FALSE, Prenum1);
break;
// move window to new tab page
case 'T':
CHECK_CMDWIN;
if (one_window())
msg(_(m_onlyone));
else
{
tabpage_T *oldtab = curtab;
tabpage_T *newtab;
// First create a new tab with the window, then go back to
// the old tab and close the window there.
wp = curwin;
if (win_new_tabpage((int)Prenum) == OK
&& valid_tabpage(oldtab))
{
newtab = curtab;
goto_tabpage_tp(oldtab, TRUE, TRUE);
if (curwin == wp)
win_close(curwin, FALSE);
if (valid_tabpage(newtab))
goto_tabpage_tp(newtab, TRUE, TRUE);
}
}
break;
// cursor to top-left window
case 't':
case Ctrl_T:
win_goto(firstwin);
break;
// cursor to bottom-right window
case 'b':
case Ctrl_B:
win_goto(lastwin);
break;
// cursor to last accessed (previous) window
case 'p':
case Ctrl_P:
if (!win_valid(prevwin))
beep_flush();
else
win_goto(prevwin);
break;
// exchange current and next window
case 'x':
case Ctrl_X:
CHECK_CMDWIN;
win_exchange(Prenum);
break;
// rotate windows downwards
case Ctrl_R:
case 'r':
CHECK_CMDWIN;
reset_VIsual_and_resel(); // stop Visual mode
win_rotate(FALSE, (int)Prenum1); // downwards
break;
// rotate windows upwards
case 'R':
CHECK_CMDWIN;
reset_VIsual_and_resel(); // stop Visual mode
win_rotate(TRUE, (int)Prenum1); // upwards
break;
// move window to the very top/bottom/left/right
case 'K':
case 'J':
case 'H':
case 'L':
CHECK_CMDWIN;
win_totop((int)Prenum,
((nchar == 'H' || nchar == 'L') ? WSP_VERT : 0)
| ((nchar == 'H' || nchar == 'K') ? WSP_TOP : WSP_BOT));
break;
// make all windows the same width and/or height
case '=':
{
int mod = cmdmod.cmod_split & (WSP_VERT | WSP_HOR);
#ifdef FEAT_GUI
need_mouse_correct = TRUE;
#endif
win_equal(NULL, FALSE,
mod == WSP_VERT ? 'v' : mod == WSP_HOR ? 'h' : 'b');
}
break;
// increase current window height
case '+':
#ifdef FEAT_GUI
need_mouse_correct = TRUE;
#endif
win_setheight(curwin->w_height + (int)Prenum1);
break;
// decrease current window height
case '-':
#ifdef FEAT_GUI
need_mouse_correct = TRUE;
#endif
win_setheight(curwin->w_height - (int)Prenum1);
break;
// set current window height
case Ctrl__:
case '_':
#ifdef FEAT_GUI
need_mouse_correct = TRUE;
#endif
win_setheight(Prenum ? (int)Prenum : 9999);
break;
// increase current window width
case '>':
#ifdef FEAT_GUI
need_mouse_correct = TRUE;
#endif
win_setwidth(curwin->w_width + (int)Prenum1);
break;
// decrease current window width
case '<':
#ifdef FEAT_GUI
need_mouse_correct = TRUE;
#endif
win_setwidth(curwin->w_width - (int)Prenum1);
break;
// set current window width
case '|':
#ifdef FEAT_GUI
need_mouse_correct = TRUE;
#endif
win_setwidth(Prenum != 0 ? (int)Prenum : 9999);
break;
// jump to tag and split window if tag exists (in preview window)
#if defined(FEAT_QUICKFIX)
case '}':
CHECK_CMDWIN;
if (Prenum)
g_do_tagpreview = Prenum;
else
g_do_tagpreview = p_pvh;
#endif
// FALLTHROUGH
case ']':
case Ctrl_RSB:
CHECK_CMDWIN;
// keep Visual mode, can select words to use as a tag
if (Prenum)
postponed_split = Prenum;
else
postponed_split = -1;
#ifdef FEAT_QUICKFIX
if (nchar != '}')
g_do_tagpreview = 0;
#endif
// Execute the command right here, required when "wincmd ]"
// was used in a function.
do_nv_ident(Ctrl_RSB, NUL);
postponed_split = 0;
break;
// edit file name under cursor in a new window
case 'f':
case 'F':
case Ctrl_F:
wingotofile:
CHECK_CMDWIN;
if (check_text_or_curbuf_locked(NULL))
break;
ptr = grab_file_name(Prenum1, &lnum);
if (ptr != NULL)
{
tabpage_T *oldtab = curtab;
win_T *oldwin = curwin;
#ifdef FEAT_GUI
need_mouse_correct = TRUE;
#endif
setpcmark();
// If 'switchbuf' is set to 'useopen' or 'usetab' and the
// file is already opened in a window, then jump to it.
wp = NULL;
if ((swb_flags & (SWB_USEOPEN | SWB_USETAB))
&& cmdmod.cmod_tab == 0)
wp = swbuf_goto_win_with_buf(buflist_findname_exp(ptr));
if (wp == NULL && win_split(0, 0) == OK)
{
RESET_BINDING(curwin);
if (do_ecmd(0, ptr, NULL, NULL, ECMD_LASTL,
ECMD_HIDE, NULL) == FAIL)
{
// Failed to open the file, close the window
// opened for it.
win_close(curwin, FALSE);
goto_tabpage_win(oldtab, oldwin);
}
else
wp = curwin;
}
if (wp != NULL && nchar == 'F' && lnum >= 0)
{
curwin->w_cursor.lnum = lnum;
check_cursor_lnum();
beginline(BL_SOL | BL_FIX);
}
vim_free(ptr);
}
break;
#ifdef FEAT_FIND_ID
// Go to the first occurrence of the identifier under cursor along path in a
// new window -- webb
case 'i': // Go to any match
case Ctrl_I:
type = FIND_ANY;
// FALLTHROUGH
case 'd': // Go to definition, using 'define'
case Ctrl_D:
CHECK_CMDWIN;
if ((len = find_ident_under_cursor(&ptr, FIND_IDENT)) == 0)
break;
// Make a copy, if the line was changed it will be freed.
ptr = vim_strnsave(ptr, len);
if (ptr == NULL)
break;
find_pattern_in_path(ptr, 0, len, TRUE,
Prenum == 0 ? TRUE : FALSE, type,
Prenum1, ACTION_SPLIT, (linenr_T)1, (linenr_T)MAXLNUM);
vim_free(ptr);
curwin->w_set_curswant = TRUE;
break;
#endif
// Quickfix window only: view the result under the cursor in a new split.
#if defined(FEAT_QUICKFIX)
case K_KENTER:
case CAR:
if (bt_quickfix(curbuf))
qf_view_result(TRUE);
break;
#endif
// CTRL-W g extended commands
case 'g':
case Ctrl_G:
CHECK_CMDWIN;
#ifdef USE_ON_FLY_SCROLL
dont_scroll = TRUE; // disallow scrolling here
#endif
++no_mapping;
++allow_keys; // no mapping for xchar, but allow key codes
if (xchar == NUL)
xchar = plain_vgetc();
LANGMAP_ADJUST(xchar, TRUE);
--no_mapping;
--allow_keys;
(void)add_to_showcmd(xchar);
switch (xchar)
{
#if defined(FEAT_QUICKFIX)
case '}':
xchar = Ctrl_RSB;
if (Prenum)
g_do_tagpreview = Prenum;
else
g_do_tagpreview = p_pvh;
#endif
// FALLTHROUGH
case ']':
case Ctrl_RSB:
// keep Visual mode, can select words to use as a tag
if (Prenum)
postponed_split = Prenum;
else
postponed_split = -1;
// Execute the command right here, required when
// "wincmd g}" was used in a function.
do_nv_ident('g', xchar);
postponed_split = 0;
break;
case 'f': // CTRL-W gf: "gf" in a new tab page
case 'F': // CTRL-W gF: "gF" in a new tab page
cmdmod.cmod_tab = tabpage_index(curtab) + 1;
nchar = xchar;
goto wingotofile;
case 't': // CTRL-W gt: go to next tab page
goto_tabpage((int)Prenum);
break;
case 'T': // CTRL-W gT: go to previous tab page
goto_tabpage(-(int)Prenum1);
break;
case TAB: // CTRL-W g<Tab>: go to last used tab page
if (goto_tabpage_lastused() == FAIL)
beep_flush();
break;
default:
beep_flush();
break;
}
break;
default: beep_flush();
break;
}
}
/*
* Figure out the address type for ":wincmd".
*/
void
get_wincmd_addr_type(char_u *arg, exarg_T *eap)
{
switch (*arg)
{
case 'S':
case Ctrl_S:
case 's':
case Ctrl_N:
case 'n':
case 'j':
case Ctrl_J:
case 'k':
case Ctrl_K:
case 'T':
case Ctrl_R:
case 'r':
case 'R':
case 'K':
case 'J':
case '+':
case '-':
case Ctrl__:
case '_':
case '|':
case ']':
case Ctrl_RSB:
case 'g':
case Ctrl_G:
case Ctrl_V:
case 'v':
case 'h':
case Ctrl_H:
case 'l':
case Ctrl_L:
case 'H':
case 'L':
case '>':
case '<':
#if defined(FEAT_QUICKFIX)
case '}':
#endif
case 'f':
case 'F':
case Ctrl_F:
#ifdef FEAT_FIND_ID
case 'i':
case Ctrl_I:
case 'd':
case Ctrl_D:
#endif
// window size or any count
eap->addr_type = ADDR_OTHER;
break;
case Ctrl_HAT:
case '^':
// buffer number
eap->addr_type = ADDR_BUFFERS;
break;
case Ctrl_Q:
case 'q':
case Ctrl_C:
case 'c':
case Ctrl_O:
case 'o':
case Ctrl_W:
case 'w':
case 'W':
case 'x':
case Ctrl_X:
// window number
eap->addr_type = ADDR_WINDOWS;
break;
#if defined(FEAT_QUICKFIX)
case Ctrl_Z:
case 'z':
case 'P':
#endif
case 't':
case Ctrl_T:
case 'b':
case Ctrl_B:
case 'p':
case Ctrl_P:
case '=':
case CAR:
// no count
eap->addr_type = ADDR_NONE;
break;
}
}
static void
cmd_with_count(
char *cmd,
char_u *bufp,
size_t bufsize,
long Prenum)
{
if (Prenum > 0)
vim_snprintf((char *)bufp, bufsize, "%s %ld", cmd, Prenum);
else
STRCPY(bufp, cmd);
}
/*
* If "split_disallowed" is set give an error and return FAIL.
* Otherwise return OK.
*/
static int
check_split_disallowed(void)
{
if (split_disallowed > 0)
{
emsg(_(e_cant_split_window_while_closing_another));
return FAIL;
}
if (curwin->w_buffer->b_locked_split)
{
emsg(_(e_cannot_split_window_when_closing_buffer));
return FAIL;
}
return OK;
}
/*
* split the current window, implements CTRL-W s and :split
*
* "size" is the height or width for the new window, 0 to use half of current
* height or width.
*
* "flags":
* WSP_ROOM: require enough room for new window
* WSP_VERT: vertical split.
* WSP_TOP: open window at the top-left of the shell (help window).
* WSP_BOT: open window at the bottom-right of the shell (quickfix window).
* WSP_HELP: creating the help window, keep layout snapshot
*
* return FAIL for failure, OK otherwise
*/
int
win_split(int size, int flags)
{
if (ERROR_IF_ANY_POPUP_WINDOW)
return FAIL;
if (check_split_disallowed() == FAIL)
return FAIL;
// When the ":tab" modifier was used open a new tab page instead.
if (may_open_tabpage() == OK)
return OK;
// Add flags from ":vertical", ":topleft" and ":botright".
flags |= cmdmod.cmod_split;
if ((flags & WSP_TOP) && (flags & WSP_BOT))
{
emsg(_(e_cant_split_topleft_and_botright_at_the_same_time));
return FAIL;
}
// When creating the help window make a snapshot of the window layout.
// Otherwise clear the snapshot, it's now invalid.
if (flags & WSP_HELP)
make_snapshot(SNAP_HELP_IDX);
else
clear_snapshot(curtab, SNAP_HELP_IDX);
return win_split_ins(size, flags, NULL, 0);
}
/*
* When "new_wp" is NULL: split the current window in two.
* When "new_wp" is not NULL: insert this window at the far
* top/left/right/bottom.
* Return FAIL for failure, OK otherwise.
*/
int
win_split_ins(
int size,
int flags,
win_T *new_wp,
int dir)
{
win_T *wp = new_wp;
win_T *oldwin;
int new_size = size;
int i;
int need_status = 0;
int do_equal = FALSE;
int needed;
int available;
int oldwin_height = 0;
int layout;
frame_T *frp, *curfrp, *frp2, *prevfrp;
int before;
int minheight;
int wmh1;
int did_set_fraction = FALSE;
int retval = FAIL;
// Do not redraw here, curwin->w_buffer may be invalid.
++RedrawingDisabled;
if (flags & WSP_TOP)
oldwin = firstwin;
else if (flags & WSP_BOT)
oldwin = lastwin;
else
oldwin = curwin;
// add a status line when p_ls == 1 and splitting the first window
if (ONE_WINDOW && p_ls == 1 && oldwin->w_status_height == 0)
{
if (VISIBLE_HEIGHT(oldwin) <= p_wmh && new_wp == NULL)
{
emsg(_(e_not_enough_room));
goto theend;
}
need_status = STATUS_HEIGHT;
}
#ifdef FEAT_GUI
// May be needed for the scrollbars that are going to change.
if (gui.in_use)
out_flush();
#endif
if (flags & WSP_VERT)
{
int wmw1;
int minwidth;
layout = FR_ROW;
/*
* Check if we are able to split the current window and compute its
* width.
*/
// Current window requires at least 1 space.
wmw1 = (p_wmw == 0 ? 1 : p_wmw);
needed = wmw1 + 1;
if (flags & WSP_ROOM)
needed += p_wiw - wmw1;
if (flags & (WSP_BOT | WSP_TOP))
{
minwidth = frame_minwidth(topframe, NOWIN);