diff options
Diffstat (limited to 'src/nvim/window.c')
| -rw-r--r-- | src/nvim/window.c | 5394 |
1 files changed, 5394 insertions, 0 deletions
diff --git a/src/nvim/window.c b/src/nvim/window.c new file mode 100644 index 0000000000..27582184d7 --- /dev/null +++ b/src/nvim/window.c @@ -0,0 +1,5394 @@ +/* + * 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" +#include "window.h" +#include "buffer.h" +#include "charset.h" +#include "diff.h" +#include "edit.h" +#include "eval.h" +#include "ex_cmds.h" +#include "ex_cmds2.h" +#include "ex_docmd.h" +#include "ex_eval.h" +#include "ex_getln.h" +#include "farsi.h" +#include "fileio.h" +#include "fold.h" +#include "getchar.h" +#include "hashtab.h" +#include "main.h" +#include "mark.h" +#include "memline.h" +#include "memory.h" +#include "message.h" +#include "misc1.h" +#include "misc2.h" +#include "file_search.h" +#include "garray.h" +#include "move.h" +#include "normal.h" +#include "option.h" +#include "os_unix.h" +#include "path.h" +#include "quickfix.h" +#include "regexp.h" +#include "screen.h" +#include "search.h" +#include "syntax.h" +#include "term.h" +#include "undo.h" +#include "os/os.h" + +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 int last_window(void); +static int close_last_window_tabpage(win_T *win, int free_buf, + tabpage_T *prev_curtab); +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 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 void win_enter_ext(win_T *wp, int undo_sync, int no_curwin, + int trigger_enter_autocmds, + int trigger_leave_autocmds); +static void win_free(win_T *wp, tabpage_T *tp); +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 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); +static void set_fraction(win_T *wp); + +#define NOWIN (win_T *)-1 /* non-existing window */ + +# define ROWS_AVAIL (Rows - p_ch - tabline_height()) + + +static char *m_onlyone = N_("Already only one window"); + +/* + * 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; + int type = FIND_DEFINE; + int len; + char_u cbuf[40]; + + if (Prenum == 0) + Prenum1 = 1; + else + Prenum1 = Prenum; + +# define CHECK_CMDWIN if (cmdwin_type != 0) { EMSG(_(e_cmdwin)); break; } + + 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; + 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; + 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 */ + STRCPY(cbuf, "split #"); + if (Prenum) + vim_snprintf((char *)cbuf + 7, sizeof(cbuf) - 7, + "%" PRId64, (int64_t)Prenum); + do_cmdline_cmd(cbuf); + 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, "%" PRId64, (int64_t)Prenum); + else + cbuf[0] = NUL; + if (nchar == 'v' || nchar == Ctrl_V) + STRCAT(cbuf, "v"); + STRCAT(cbuf, "new"); + do_cmdline_cmd(cbuf); + break; + + /* quit current window */ + case Ctrl_Q: + case 'q': + reset_VIsual_and_resel(); /* stop Visual mode */ + do_cmdline_cmd((char_u *)"quit"); + break; + + /* close current window */ + case Ctrl_C: + case 'c': + reset_VIsual_and_resel(); /* stop Visual mode */ + do_cmdline_cmd((char_u *)"close"); + break; + + /* 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 (wp = firstwin; wp != NULL; wp = wp->w_next) + if (wp->w_p_pvw) + break; + if (wp == NULL) + EMSG(_("E441: There is no preview window")); + else + win_goto(wp); + break; + + /* close all but current window */ + case Ctrl_O: + case 'o': + CHECK_CMDWIN reset_VIsual_and_resel(); /* stop Visual mode */ + do_cmdline_cmd((char_u *)"only"); + 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 (firstwin == lastwin && 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': + 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 (prevwin == NULL) + 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 height */ + case '=': + win_equal(NULL, FALSE, 'b'); + break; + + /* increase current window height */ + case '+': + win_setheight(curwin->w_height + (int)Prenum1); + break; + + /* decrease current window height */ + case '-': + win_setheight(curwin->w_height - (int)Prenum1); + break; + + /* set current window height */ + case Ctrl__: + case '_': + win_setheight(Prenum ? (int)Prenum : 9999); + break; + + /* increase current window width */ + case '>': + win_setwidth(curwin->w_width + (int)Prenum1); + break; + + /* decrease current window width */ + case '<': + win_setwidth(curwin->w_width - (int)Prenum1); + break; + + /* set current window width */ + case '|': + win_setwidth(Prenum != 0 ? (int)Prenum : 9999); + break; + + /* jump to tag and split window if tag exists (in preview window) */ + case '}': + CHECK_CMDWIN + if (Prenum) + g_do_tagpreview = Prenum; + else + g_do_tagpreview = p_pvh; + /*FALLTHROUGH*/ + case ']': + case Ctrl_RSB: + CHECK_CMDWIN reset_VIsual_and_resel(); /* stop Visual mode */ + if (Prenum) + postponed_split = Prenum; + else + postponed_split = -1; + + /* Execute the command right here, required when + * "wincmd ]" was used in a function. */ + do_nv_ident(Ctrl_RSB, NUL); + break; + + /* edit file name under cursor in a new window */ + case 'f': + case 'F': + case Ctrl_F: +wingotofile: + CHECK_CMDWIN + + ptr = grab_file_name(Prenum1, &lnum); + if (ptr != NULL) { + setpcmark(); + if (win_split(0, 0) == OK) { + RESET_BINDING(curwin); + (void)do_ecmd(0, ptr, NULL, NULL, ECMD_LASTL, + ECMD_HIDE, NULL); + if (nchar == 'F' && lnum >= 0) { + curwin->w_cursor.lnum = lnum; + check_cursor_lnum(); + beginline(BL_SOL | BL_FIX); + } + } + free(ptr); + } + break; + + /* 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; + find_pattern_in_path(ptr, 0, len, TRUE, + Prenum == 0 ? TRUE : FALSE, type, + Prenum1, ACTION_SPLIT, (linenr_T)1, (linenr_T)MAXLNUM); + curwin->w_set_curswant = TRUE; + break; + + case K_KENTER: + case CAR: + /* + * In a quickfix window a <CR> jumps to the error under the + * cursor in a new window. + */ + if (bt_quickfix(curbuf)) { + sprintf((char *)cbuf, "split +%" PRId64 "%s", + (int64_t)curwin->w_cursor.lnum, + (curwin->w_llist_ref == NULL) ? "cc" : "ll"); + do_cmdline_cmd(cbuf); + } + break; + + + /* 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) { + case '}': + xchar = Ctrl_RSB; + if (Prenum) + g_do_tagpreview = Prenum; + else + g_do_tagpreview = p_pvh; + /*FALLTHROUGH*/ + case ']': + case Ctrl_RSB: + reset_VIsual_and_resel(); /* stop Visual mode */ + 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); + break; + + case 'f': /* CTRL-W gf: "gf" in a new tab page */ + case 'F': /* CTRL-W gF: "gF" in a new tab page */ + cmdmod.tab = tabpage_index(curtab) + 1; + nchar = xchar; + goto wingotofile; + default: + beep_flush(); + break; + } + break; + + default: beep_flush(); + break; + } +} + +/* + * 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) +{ + /* 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.split; + if ((flags & WSP_TOP) && (flags & WSP_BOT)) { + EMSG(_("E442: Can't 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; + int before; + + 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 (lastwin == firstwin && p_ls == 1 && oldwin->w_status_height == 0) { + if (oldwin->w_height <= p_wmh && new_wp == NULL) { + EMSG(_(e_noroom)); + return FAIL; + } + need_status = STATUS_HEIGHT; + } + + + if (flags & WSP_VERT) { + layout = FR_ROW; + + /* + * Check if we are able to split the current window and compute its + * width. + */ + needed = p_wmw + 1; + if (flags & WSP_ROOM) + needed += p_wiw - p_wmw; + if (p_ea || (flags & (WSP_BOT | WSP_TOP))) { + available = topframe->fr_width; + needed += frame_minwidth(topframe, NULL); + } else + available = oldwin->w_width; + if (available < needed && new_wp == NULL) { + EMSG(_(e_noroom)); + return FAIL; + } + if (new_size == 0) + new_size = oldwin->w_width / 2; + if (new_size > oldwin->w_width - p_wmw - 1) + new_size = oldwin->w_width - p_wmw - 1; + if (new_size < p_wmw) + new_size = p_wmw; + + /* if it doesn't fit in the current window, need win_equal() */ + if (oldwin->w_width - new_size - 1 < p_wmw) + do_equal = TRUE; + + /* We don't like to take lines for the new window from a + * 'winfixwidth' window. Take them from a window to the left or right + * instead, if possible. */ + if (oldwin->w_p_wfw) + win_setwidth_win(oldwin->w_width + new_size, oldwin); + + /* Only make all windows the same width if one of them (except oldwin) + * is wider than one of the split windows. */ + if (!do_equal && p_ea && size == 0 && *p_ead != 'v' + && oldwin->w_frame->fr_parent != NULL) { + frp = oldwin->w_frame->fr_parent->fr_child; + while (frp != NULL) { + if (frp->fr_win != oldwin && frp->fr_win != NULL + && (frp->fr_win->w_width > new_size + || frp->fr_win->w_width > oldwin->w_width + - new_size - STATUS_HEIGHT)) { + do_equal = TRUE; + break; + } + frp = frp->fr_next; + } + } + } else { + layout = FR_COL; + + /* + * Check if we are able to split the current window and compute its + * height. + */ + needed = p_wmh + STATUS_HEIGHT + need_status; + if (flags & WSP_ROOM) + needed += p_wh - p_wmh; + if (p_ea || (flags & (WSP_BOT | WSP_TOP))) { + available = topframe->fr_height; + needed += frame_minheight(topframe, NULL); + } else { + available = oldwin->w_height; + needed += p_wmh; + } + if (available < needed && new_wp == NULL) { + EMSG(_(e_noroom)); + return FAIL; + } + oldwin_height = oldwin->w_height; + if (need_status) { + oldwin->w_status_height = STATUS_HEIGHT; + oldwin_height -= STATUS_HEIGHT; + } + if (new_size == 0) + new_size = oldwin_height / 2; + + if (new_size > oldwin_height - p_wmh - STATUS_HEIGHT) + new_size = oldwin_height - p_wmh - STATUS_HEIGHT; + if (new_size < p_wmh) + new_size = p_wmh; + + /* if it doesn't fit in the current window, need win_equal() */ + if (oldwin_height - new_size - STATUS_HEIGHT < p_wmh) + do_equal = TRUE; + + /* We don't like to take lines for the new window from a + * 'winfixheight' window. Take them from a window above or below + * instead, if possible. */ + if (oldwin->w_p_wfh) { + win_setheight_win(oldwin->w_height + new_size + STATUS_HEIGHT, + oldwin); + oldwin_height = oldwin->w_height; + if (need_status) + oldwin_height -= STATUS_HEIGHT; + } + + /* Only make all windows the same height if one of them (except oldwin) + * is higher than one of the split windows. */ + if (!do_equal && p_ea && size == 0 + && *p_ead != 'h' + && oldwin->w_frame->fr_parent != NULL) { + frp = oldwin->w_frame->fr_parent->fr_child; + while (frp != NULL) { + if (frp->fr_win != oldwin && frp->fr_win != NULL + && (frp->fr_win->w_height > new_size + || frp->fr_win->w_height > oldwin_height - new_size + - STATUS_HEIGHT)) { + do_equal = TRUE; + break; + } + frp = frp->fr_next; + } + } + } + + /* + * allocate new window structure and link it in the window list + */ + if ((flags & WSP_TOP) == 0 + && ((flags & WSP_BOT) + || (flags & WSP_BELOW) + || (!(flags & WSP_ABOVE) + && ( + (flags & WSP_VERT) ? p_spr : + p_sb)))) { + /* new window below/right of current one */ + if (new_wp == NULL) + wp = win_alloc(oldwin, FALSE); + else + win_append(oldwin, wp); + } else { + if (new_wp == NULL) + wp = win_alloc(oldwin->w_prev, FALSE); + else + win_append(oldwin->w_prev, wp); + } + + if (new_wp == NULL) { + if (wp == NULL) + return FAIL; + + new_frame(wp); + + /* make the contents of the new window the same as the current one */ + win_init(wp, curwin, flags); + } + + /* + * Reorganise the tree of frames to insert the new window. + */ + if (flags & (WSP_TOP | WSP_BOT)) { + if ((topframe->fr_layout == FR_COL && (flags & WSP_VERT) == 0) + || (topframe->fr_layout == FR_ROW && (flags & WSP_VERT) != 0)) { + curfrp = topframe->fr_child; + if (flags & WSP_BOT) + while (curfrp->fr_next != NULL) + curfrp = curfrp->fr_next; + } else + curfrp = topframe; + before = (flags & WSP_TOP); + } else { + curfrp = oldwin->w_frame; + if (flags & WSP_BELOW) + before = FALSE; + else if (flags & WSP_ABOVE) + before = TRUE; + else if (flags & WSP_VERT) + before = !p_spr; + else + before = !p_sb; + } + if (curfrp->fr_parent == NULL || curfrp->fr_parent->fr_layout != layout) { + /* Need to create a new frame in the tree to make a branch. */ + frp = xcalloc(1, sizeof(frame_T)); + *frp = *curfrp; + curfrp->fr_layout = layout; + frp->fr_parent = curfrp; + frp->fr_next = NULL; + frp->fr_prev = NULL; + curfrp->fr_child = frp; + curfrp->fr_win = NULL; + curfrp = frp; + if (frp->fr_win != NULL) + oldwin->w_frame = frp; + else + for (frp = frp->fr_child; frp != NULL; frp = frp->fr_next) + frp->fr_parent = curfrp; + } + + if (new_wp == NULL) + frp = wp->w_frame; + else + frp = new_wp->w_frame; + frp->fr_parent = curfrp->fr_parent; + + /* Insert the new frame at the right place in the frame list. */ + if (before) + frame_insert(curfrp, frp); + else + frame_append(curfrp, frp); + + /* Set w_fraction now so that the cursor keeps the same relative + * vertical position. */ + if (oldwin->w_height > 0) + set_fraction(oldwin); + wp->w_fraction = oldwin->w_fraction; + + if (flags & WSP_VERT) { + wp->w_p_scr = curwin->w_p_scr; + + if (need_status) { + win_new_height(oldwin, oldwin->w_height - 1); + oldwin->w_status_height = need_status; + } + if (flags & (WSP_TOP | WSP_BOT)) { + /* set height and row of new window to full height */ + wp->w_winrow = tabline_height(); + win_new_height(wp, curfrp->fr_height - (p_ls > 0)); + wp->w_status_height = (p_ls > 0); + } else { + /* height and row of new window is same as current window */ + wp->w_winrow = oldwin->w_winrow; + win_new_height(wp, oldwin->w_height); + wp->w_status_height = oldwin->w_status_height; + } + frp->fr_height = curfrp->fr_height; + + /* "new_size" of the current window goes to the new window, use + * one column for the vertical separator */ + win_new_width(wp, new_size); + if (before) + wp->w_vsep_width = 1; + else { + wp->w_vsep_width = oldwin->w_vsep_width; + oldwin->w_vsep_width = 1; + } + if (flags & (WSP_TOP | WSP_BOT)) { + if (flags & WSP_BOT) + frame_add_vsep(curfrp); + /* Set width of neighbor frame */ + frame_new_width(curfrp, curfrp->fr_width + - (new_size + ((flags & WSP_TOP) != 0)), flags & WSP_TOP, + FALSE); + } else + win_new_width(oldwin, oldwin->w_width - (new_size + 1)); + if (before) { /* new window left of current one */ + wp->w_wincol = oldwin->w_wincol; + oldwin->w_wincol += new_size + 1; + } else /* new window right of current one */ + wp->w_wincol = oldwin->w_wincol + oldwin->w_width + 1; + frame_fix_width(oldwin); + frame_fix_width(wp); + } else { + /* width and column of new window is same as current window */ + if (flags & (WSP_TOP | WSP_BOT)) { + wp->w_wincol = 0; + win_new_width(wp, Columns); + wp->w_vsep_width = 0; + } else { + wp->w_wincol = oldwin->w_wincol; + win_new_width(wp, oldwin->w_width); + wp->w_vsep_width = oldwin->w_vsep_width; + } + frp->fr_width = curfrp->fr_width; + + /* "new_size" of the current window goes to the new window, use + * one row for the status line */ + win_new_height(wp, new_size); + if (flags & (WSP_TOP | WSP_BOT)) + frame_new_height(curfrp, curfrp->fr_height + - (new_size + STATUS_HEIGHT), flags & WSP_TOP, FALSE); + else + win_new_height(oldwin, oldwin_height - (new_size + STATUS_HEIGHT)); + if (before) { /* new window above current one */ + wp->w_winrow = oldwin->w_winrow; + wp->w_status_height = STATUS_HEIGHT; + oldwin->w_winrow += wp->w_height + STATUS_HEIGHT; + } else { /* new window below current one */ + wp->w_winrow = oldwin->w_winrow + oldwin->w_height + STATUS_HEIGHT; + wp->w_status_height = oldwin->w_status_height; + oldwin->w_status_height = STATUS_HEIGHT; + } + if (flags & WSP_BOT) + frame_add_statusline(curfrp); + frame_fix_height(wp); + frame_fix_height(oldwin); + } + + if (flags & (WSP_TOP | WSP_BOT)) + (void)win_comp_pos(); + + /* + * Both windows need redrawing + */ + redraw_win_later(wp, NOT_VALID); + wp->w_redr_status = TRUE; + redraw_win_later(oldwin, NOT_VALID); + oldwin->w_redr_status = TRUE; + + if (need_status) { + msg_row = Rows - 1; + msg_col = sc_col; + msg_clr_eos_force(); /* Old command/ruler may still be there */ + comp_col(); + msg_row = Rows - 1; + msg_col = 0; /* put position back at start of line */ + } + + /* + * equalize the window sizes. + */ + if (do_equal || dir != 0) + win_equal(wp, TRUE, + (flags & WSP_VERT) ? (dir == 'v' ? 'b' : 'h') + : dir == 'h' ? 'b' : + 'v'); + + /* Don't change the window height/width to 'winheight' / 'winwidth' if a + * size was given. */ + if (flags & WSP_VERT) { + i = p_wiw; + if (size != 0) + p_wiw = size; + + } else { + i = p_wh; + if (size != 0) + p_wh = size; + } + + /* + * make the new window the current window + */ + win_enter(wp, FALSE); + if (flags & WSP_VERT) + p_wiw = i; + else + p_wh = i; + + return OK; +} + + +/* + * Initialize window "newp" from window "oldp". + * Used when splitting a window and when creating a new tab page. + * The windows will both edit the same buffer. + * WSP_NEWLOC may be specified in flags to prevent the location list from + * being copied. + */ +static void win_init(win_T *newp, win_T *oldp, int flags) +{ + int i; + + newp->w_buffer = oldp->w_buffer; + newp->w_s = &(oldp->w_buffer->b_s); + oldp->w_buffer->b_nwindows++; + newp->w_cursor = oldp->w_cursor; + newp->w_valid = 0; + newp->w_curswant = oldp->w_curswant; + newp->w_set_curswant = oldp->w_set_curswant; + newp->w_topline = oldp->w_topline; + newp->w_topfill = oldp->w_topfill; + newp->w_leftcol = oldp->w_leftcol; + newp->w_pcmark = oldp->w_pcmark; + newp->w_prev_pcmark = oldp->w_prev_pcmark; + newp->w_alt_fnum = oldp->w_alt_fnum; + newp->w_wrow = oldp->w_wrow; + newp->w_fraction = oldp->w_fraction; + newp->w_prev_fraction_row = oldp->w_prev_fraction_row; + copy_jumplist(oldp, newp); + if (flags & WSP_NEWLOC) { + /* Don't copy the location list. */ + newp->w_llist = NULL; + newp->w_llist_ref = NULL; + } else + copy_loclist(oldp, newp); + newp->w_localdir = (oldp->w_localdir == NULL) + ? NULL : vim_strsave(oldp->w_localdir); + + /* copy tagstack and folds */ + for (i = 0; i < oldp->w_tagstacklen; i++) { + newp->w_tagstack[i] = oldp->w_tagstack[i]; + if (newp->w_tagstack[i].tagname != NULL) + newp->w_tagstack[i].tagname = + vim_strsave(newp->w_tagstack[i].tagname); + } + newp->w_tagstackidx = oldp->w_tagstackidx; + newp->w_tagstacklen = oldp->w_tagstacklen; + copyFoldingState(oldp, newp); + + win_init_some(newp, oldp); + + check_colorcolumn(newp); +} + +/* + * Initialize window "newp" from window"old". + * Only the essential things are copied. + */ +static void win_init_some(win_T *newp, win_T *oldp) +{ + /* Use the same argument list. */ + newp->w_alist = oldp->w_alist; + ++newp->w_alist->al_refcount; + newp->w_arg_idx = oldp->w_arg_idx; + + /* copy options from existing window */ + win_copy_options(oldp, newp); +} + + +/* + * Check if "win" is a pointer to an existing window. + */ +int win_valid(win_T *win) +{ + win_T *wp; + + if (win == NULL) + return FALSE; + for (wp = firstwin; wp != NULL; wp = wp->w_next) + if (wp == win) + return TRUE; + return FALSE; +} + +/* + * Return the number of windows. + */ +int win_count(void) +{ + win_T *wp; + int count = 0; + + for (wp = firstwin; wp != NULL; wp = wp->w_next) + ++count; + return count; +} + +/* + * Make "count" windows on the screen. + * Return actual number of windows on the screen. + * Must be called when there is just one window, filling the whole screen + * (excluding the command line). + */ +int +make_windows ( + int count, + int vertical /* split windows vertically if TRUE */ +) +{ + int maxcount; + int todo; + + if (vertical) { + /* Each windows needs at least 'winminwidth' lines and a separator + * column. */ + maxcount = (curwin->w_width + curwin->w_vsep_width + - (p_wiw - p_wmw)) / (p_wmw + 1); + } else { + /* Each window needs at least 'winminheight' lines and a status line. */ + maxcount = (curwin->w_height + curwin->w_status_height + - (p_wh - p_wmh)) / (p_wmh + STATUS_HEIGHT); + } + + if (maxcount < 2) + maxcount = 2; + if (count > maxcount) + count = maxcount; + + /* + * add status line now, otherwise first window will be too big + */ + if (count > 1) + last_status(TRUE); + + /* + * Don't execute autocommands while creating the windows. Must do that + * when putting the buffers in the windows. + */ + block_autocmds(); + + /* todo is number of windows left to create */ + for (todo = count - 1; todo > 0; --todo) + if (vertical) { + if (win_split(curwin->w_width - (curwin->w_width - todo) + / (todo + 1) - 1, WSP_VERT | WSP_ABOVE) == FAIL) + break; + } else { + if (win_split(curwin->w_height - (curwin->w_height - todo + * STATUS_HEIGHT) / (todo + 1) + - STATUS_HEIGHT, WSP_ABOVE) == FAIL) + break; + } + + unblock_autocmds(); + + /* return actual number of windows */ + return count - todo; +} + +/* + * Exchange current and next window + */ +static void win_exchange(long Prenum) +{ + frame_T *frp; + frame_T *frp2; + win_T *wp; + win_T *wp2; + int temp; + + if (lastwin == firstwin) { /* just one window */ + beep_flush(); + return; + } + + + /* + * find window to exchange with + */ + if (Prenum) { + frp = curwin->w_frame->fr_parent->fr_child; + while (frp != NULL && --Prenum > 0) + frp = frp->fr_next; + } else if (curwin->w_frame->fr_next != NULL) /* Swap with next */ + frp = curwin->w_frame->fr_next; + else /* Swap last window in row/col with previous */ + frp = curwin->w_frame->fr_prev; + + /* We can only exchange a window with another window, not with a frame + * containing windows. */ + if (frp == NULL || frp->fr_win == NULL || frp->fr_win == curwin) + return; + wp = frp->fr_win; + + /* + * 1. remove curwin from the list. Remember after which window it was in wp2 + * 2. insert curwin before wp in the list + * if wp != wp2 + * 3. remove wp from the list + * 4. insert wp after wp2 + * 5. exchange the status line height and vsep width. + */ + wp2 = curwin->w_prev; + frp2 = curwin->w_frame->fr_prev; + if (wp->w_prev != curwin) { + win_remove(curwin, NULL); + frame_remove(curwin->w_frame); + win_append(wp->w_prev, curwin); + frame_insert(frp, curwin->w_frame); + } + if (wp != wp2) { + win_remove(wp, NULL); + frame_remove(wp->w_frame); + win_append(wp2, wp); + if (frp2 == NULL) + frame_insert(wp->w_frame->fr_parent->fr_child, wp->w_frame); + else + frame_append(frp2, wp->w_frame); + } + temp = curwin->w_status_height; + curwin->w_status_height = wp->w_status_height; + wp->w_status_height = temp; + temp = curwin->w_vsep_width; + curwin->w_vsep_width = wp->w_vsep_width; + wp->w_vsep_width = temp; + + /* If the windows are not in the same frame, exchange the sizes to avoid + * messing up the window layout. Otherwise fix the frame sizes. */ + if (curwin->w_frame->fr_parent != wp->w_frame->fr_parent) { + temp = curwin->w_height; + curwin->w_height = wp->w_height; + wp->w_height = temp; + temp = curwin->w_width; + curwin->w_width = wp->w_width; + wp->w_width = temp; + } else { + frame_fix_height(curwin); + frame_fix_height(wp); + frame_fix_width(curwin); + frame_fix_width(wp); + } + + (void)win_comp_pos(); /* recompute window positions */ + + win_enter(wp, TRUE); + redraw_later(CLEAR); +} + +/* + * rotate windows: if upwards TRUE the second window becomes the first one + * if upwards FALSE the first window becomes the second one + */ +static void win_rotate(int upwards, int count) +{ + win_T *wp1; + win_T *wp2; + frame_T *frp; + int n; + + if (firstwin == lastwin) { /* nothing to do */ + beep_flush(); + return; + } + + + /* Check if all frames in this row/col have one window. */ + for (frp = curwin->w_frame->fr_parent->fr_child; frp != NULL; + frp = frp->fr_next) + if (frp->fr_win == NULL) { + EMSG(_("E443: Cannot rotate when another window is split")); + return; + } + + while (count--) { + if (upwards) { /* first window becomes last window */ + /* remove first window/frame from the list */ + frp = curwin->w_frame->fr_parent->fr_child; + wp1 = frp->fr_win; + win_remove(wp1, NULL); + frame_remove(frp); + + /* find last frame and append removed window/frame after it */ + for (; frp->fr_next != NULL; frp = frp->fr_next) + ; + win_append(frp->fr_win, wp1); + frame_append(frp, wp1->w_frame); + + wp2 = frp->fr_win; /* previously last window */ + } else { /* last window becomes first window */ + /* find last window/frame in the list and remove it */ + for (frp = curwin->w_frame; frp->fr_next != NULL; + frp = frp->fr_next) + ; + wp1 = frp->fr_win; + wp2 = wp1->w_prev; /* will become last window */ + win_remove(wp1, NULL); + frame_remove(frp); + + /* append the removed window/frame before the first in the list */ + win_append(frp->fr_parent->fr_child->fr_win->w_prev, wp1); + frame_insert(frp->fr_parent->fr_child, frp); + } + + /* exchange status height and vsep width of old and new last window */ + n = wp2->w_status_height; + wp2->w_status_height = wp1->w_status_height; + wp1->w_status_height = n; + frame_fix_height(wp1); + frame_fix_height(wp2); + n = wp2->w_vsep_width; + wp2->w_vsep_width = wp1->w_vsep_width; + wp1->w_vsep_width = n; + frame_fix_width(wp1); + frame_fix_width(wp2); + + /* recompute w_winrow and w_wincol for all windows */ + (void)win_comp_pos(); + } + + redraw_later(CLEAR); +} + +/* + * Move the current window to the very top/bottom/left/right of the screen. + */ +static void win_totop(int size, int flags) +{ + int dir; + int height = curwin->w_height; + + if (lastwin == firstwin) { + beep_flush(); + return; + } + + /* Remove the window and frame from the tree of frames. */ + (void)winframe_remove(curwin, &dir, NULL); + win_remove(curwin, NULL); + last_status(FALSE); /* may need to remove last status line */ + (void)win_comp_pos(); /* recompute window positions */ + + /* Split a window on the desired side and put the window there. */ + (void)win_split_ins(size, flags, curwin, dir); + if (!(flags & WSP_VERT)) { + win_setheight(height); + if (p_ea) + win_equal(curwin, TRUE, 'v'); + } + +} + +/* + * Move window "win1" to below/right of "win2" and make "win1" the current + * window. Only works within the same frame! + */ +void win_move_after(win_T *win1, win_T *win2) +{ + int height; + + /* check if the arguments are reasonable */ + if (win1 == win2) + return; + + /* check if there is something to do */ + if (win2->w_next != win1) { + /* may need move the status line/vertical separator of the last window + * */ + if (win1 == lastwin) { + height = win1->w_prev->w_status_height; + win1->w_prev->w_status_height = win1->w_status_height; + win1->w_status_height = height; + if (win1->w_prev->w_vsep_width == 1) { + /* Remove the vertical separator from the last-but-one window, + * add it to the last window. Adjust the frame widths. */ + win1->w_prev->w_vsep_width = 0; + win1->w_prev->w_frame->fr_width -= 1; + win1->w_vsep_width = 1; + win1->w_frame->fr_width += 1; + } + } else if (win2 == lastwin) { + height = win1->w_status_height; + win1->w_status_height = win2->w_status_height; + win2->w_status_height = height; + if (win1->w_vsep_width == 1) { + /* Remove the vertical separator from win1, add it to the last + * window, win2. Adjust the frame widths. */ + win2->w_vsep_width = 1; + win2->w_frame->fr_width += 1; + win1->w_vsep_width = 0; + win1->w_frame->fr_width -= 1; + } + } + win_remove(win1, NULL); + frame_remove(win1->w_frame); + win_append(win2, win1); + frame_append(win2->w_frame, win1->w_frame); + + (void)win_comp_pos(); /* recompute w_winrow for all windows */ + redraw_later(NOT_VALID); + } + win_enter(win1, FALSE); +} + +/* + * Make all windows the same height. + * 'next_curwin' will soon be the current window, make sure it has enough + * rows. + */ +void +win_equal ( + win_T *next_curwin, /* pointer to current window to be or NULL */ + int current, /* do only frame with current window */ + int dir /* 'v' for vertically, 'h' for horizontally, + 'b' for both, 0 for using p_ead */ +) +{ + if (dir == 0) + dir = *p_ead; + win_equal_rec(next_curwin == NULL ? curwin : next_curwin, current, + topframe, dir, 0, tabline_height(), + (int)Columns, topframe->fr_height); +} + +/* + * Set a frame to a new position and height, spreading the available room + * equally over contained frames. + * The window "next_curwin" (if not NULL) should at least get the size from + * 'winheight' and 'winwidth' if possible. + */ +static void +win_equal_rec ( + win_T *next_curwin, /* pointer to current window to be or NULL */ + int current, /* do only frame with current window */ + frame_T *topfr, /* frame to set size off */ + int dir, /* 'v', 'h' or 'b', see win_equal() */ + int col, /* horizontal position for frame */ + int row, /* vertical position for frame */ + int width, /* new width of frame */ + int height /* new height of frame */ +) +{ + int n, m; + int extra_sep = 0; + int wincount, totwincount = 0; + frame_T *fr; + int next_curwin_size = 0; + int room = 0; + int new_size; + int has_next_curwin = 0; + int hnc; + + if (topfr->fr_layout == FR_LEAF) { + /* Set the width/height of this frame. + * Redraw when size or position changes */ + if (topfr->fr_height != height || topfr->fr_win->w_winrow != row + || topfr->fr_width != width || topfr->fr_win->w_wincol != col + ) { + topfr->fr_win->w_winrow = row; + frame_new_height(topfr, height, FALSE, FALSE); + topfr->fr_win->w_wincol = col; + frame_new_width(topfr, width, FALSE, FALSE); + redraw_all_later(CLEAR); + } + } else if (topfr->fr_layout == FR_ROW) { + topfr->fr_width = width; + topfr->fr_height = height; + + if (dir != 'v') { /* equalize frame widths */ + /* Compute the maximum number of windows horizontally in this + * frame. */ + n = frame_minwidth(topfr, NOWIN); + /* add one for the rightmost window, it doesn't have a separator */ + if (col + width == Columns) + extra_sep = 1; + else + extra_sep = 0; + totwincount = (n + extra_sep) / (p_wmw + 1); + has_next_curwin = frame_has_win(topfr, next_curwin); + + /* + * Compute width for "next_curwin" window and room available for + * other windows. + * "m" is the minimal width when counting p_wiw for "next_curwin". + */ + m = frame_minwidth(topfr, next_curwin); + room = width - m; + if (room < 0) { + next_curwin_size = p_wiw + room; + room = 0; + } else { + next_curwin_size = -1; + for (fr = topfr->fr_child; fr != NULL; fr = fr->fr_next) { + /* If 'winfixwidth' set keep the window width if + * possible. + * Watch out for this window being the next_curwin. */ + if (frame_fixed_width(fr)) { + n = frame_minwidth(fr, NOWIN); + new_size = fr->fr_width; + if (frame_has_win(fr, next_curwin)) { + room += p_wiw - p_wmw; + next_curwin_size = 0; + if (new_size < p_wiw) + new_size = p_wiw; + } else + /* These windows don't use up room. */ + totwincount -= (n + (fr->fr_next == NULL + ? extra_sep : 0)) / (p_wmw + 1); + room -= new_size - n; + if (room < 0) { + new_size += room; + room = 0; + } + fr->fr_newwidth = new_size; + } + } + if (next_curwin_size == -1) { + if (!has_next_curwin) + next_curwin_size = 0; + else if (totwincount > 1 + && (room + (totwincount - 2)) + / (totwincount - 1) > p_wiw) { + /* Can make all windows wider than 'winwidth', spread + * the room equally. */ + next_curwin_size = (room + p_wiw + + (totwincount - 1) * p_wmw + + (totwincount - 1)) / totwincount; + room -= next_curwin_size - p_wiw; + } else + next_curwin_size = p_wiw; + } + } + + if (has_next_curwin) + --totwincount; /* don't count curwin */ + } + + for (fr = topfr->fr_child; fr != NULL; fr = fr->fr_next) { + n = m = 0; + wincount = 1; + if (fr->fr_next == NULL) + /* last frame gets all that remains (avoid roundoff error) */ + new_size = width; + else if (dir == 'v') + new_size = fr->fr_width; + else if (frame_fixed_width(fr)) { + new_size = fr->fr_newwidth; + wincount = 0; /* doesn't count as a sizeable window */ + } else { + /* Compute the maximum number of windows horiz. in "fr". */ + n = frame_minwidth(fr, NOWIN); + wincount = (n + (fr->fr_next == NULL ? extra_sep : 0)) + / (p_wmw + 1); + m = frame_minwidth(fr, next_curwin); + if (has_next_curwin) + hnc = frame_has_win(fr, next_curwin); + else + hnc = FALSE; + if (hnc) /* don't count next_curwin */ + --wincount; + if (totwincount == 0) + new_size = room; + else + new_size = (wincount * room + (totwincount / 2)) / totwincount; + if (hnc) { /* add next_curwin size */ + next_curwin_size -= p_wiw - (m - n); + new_size += next_curwin_size; + room -= new_size - next_curwin_size; + } else + room -= new_size; + new_size += n; + } + + /* Skip frame that is full width when splitting or closing a + * window, unless equalizing all frames. */ + if (!current || dir != 'v' || topfr->fr_parent != NULL + || (new_size != fr->fr_width) + || frame_has_win(fr, next_curwin)) + win_equal_rec(next_curwin, current, fr, dir, col, row, + new_size, height); + col += new_size; + width -= new_size; + totwincount -= wincount; + } + } else { /* topfr->fr_layout == FR_COL */ + topfr->fr_width = width; + topfr->fr_height = height; + + if (dir != 'h') { /* equalize frame heights */ + /* Compute maximum number of windows vertically in this frame. */ + n = frame_minheight(topfr, NOWIN); + /* add one for the bottom window if it doesn't have a statusline */ + if (row + height == cmdline_row && p_ls == 0) + extra_sep = 1; + else + extra_sep = 0; + totwincount = (n + extra_sep) / (p_wmh + 1); + has_next_curwin = frame_has_win(topfr, next_curwin); + + /* + * Compute height for "next_curwin" window and room available for + * other windows. + * "m" is the minimal height when counting p_wh for "next_curwin". + */ + m = frame_minheight(topfr, next_curwin); + room = height - m; + if (room < 0) { + /* The room is less then 'winheight', use all space for the + * current window. */ + next_curwin_size = p_wh + room; + room = 0; + } else { + next_curwin_size = -1; + for (fr = topfr->fr_child; fr != NULL; fr = fr->fr_next) { + /* If 'winfixheight' set keep the window height if + * possible. + * Watch out for this window being the next_curwin. */ + if (frame_fixed_height(fr)) { + n = frame_minheight(fr, NOWIN); + new_size = fr->fr_height; + if (frame_has_win(fr, next_curwin)) { + room += p_wh - p_wmh; + next_curwin_size = 0; + if (new_size < p_wh) + new_size = p_wh; + } else + /* These windows don't use up room. */ + totwincount -= (n + (fr->fr_next == NULL + ? extra_sep : 0)) / (p_wmh + 1); + room -= new_size - n; + if (room < 0) { + new_size += room; + room = 0; + } + fr->fr_newheight = new_size; + } + } + if (next_curwin_size == -1) { + if (!has_next_curwin) + next_curwin_size = 0; + else if (totwincount > 1 + && (room + (totwincount - 2)) + / (totwincount - 1) > p_wh) { + /* can make all windows higher than 'winheight', + * spread the room equally. */ + next_curwin_size = (room + p_wh + + (totwincount - 1) * p_wmh + + (totwincount - 1)) / totwincount; + room -= next_curwin_size - p_wh; + } else + next_curwin_size = p_wh; + } + } + + if (has_next_curwin) + --totwincount; /* don't count curwin */ + } + + for (fr = topfr->fr_child; fr != NULL; fr = fr->fr_next) { + n = m = 0; + wincount = 1; + if (fr->fr_next == NULL) + /* last frame gets all that remains (avoid roundoff error) */ + new_size = height; + else if (dir == 'h') + new_size = fr->fr_height; + else if (frame_fixed_height(fr)) { + new_size = fr->fr_newheight; + wincount = 0; /* doesn't count as a sizeable window */ + } else { + /* Compute the maximum number of windows vert. in "fr". */ + n = frame_minheight(fr, NOWIN); + wincount = (n + (fr->fr_next == NULL ? extra_sep : 0)) + / (p_wmh + 1); + m = frame_minheight(fr, next_curwin); + if (has_next_curwin) + hnc = frame_has_win(fr, next_curwin); + else + hnc = FALSE; + if (hnc) /* don't count next_curwin */ + --wincount; + if (totwincount == 0) + new_size = room; + else + new_size = (wincount * room + (totwincount / 2)) / totwincount; + if (hnc) { /* add next_curwin size */ + next_curwin_size -= p_wh - (m - n); + new_size += next_curwin_size; + room -= new_size - next_curwin_size; + } else + room -= new_size; + new_size += n; + } + /* Skip frame that is full width when splitting or closing a + * window, unless equalizing all frames. */ + if (!current || dir != 'h' || topfr->fr_parent != NULL + || (new_size != fr->fr_height) + || frame_has_win(fr, next_curwin)) + win_equal_rec(next_curwin, current, fr, dir, col, row, + width, new_size); + row += new_size; + height -= new_size; + totwincount -= wincount; + } + } +} + +/* + * close all windows for buffer 'buf' + */ +void +close_windows ( + buf_T *buf, + int keep_curwin /* don't close "curwin" */ +) +{ + win_T *wp; + tabpage_T *tp, *nexttp; + int h = tabline_height(); + + ++RedrawingDisabled; + + for (wp = firstwin; wp != NULL && lastwin != firstwin; ) { + if (wp->w_buffer == buf && (!keep_curwin || wp != curwin) + && !(wp->w_closing || wp->w_buffer->b_closing) + ) { + win_close(wp, FALSE); + + /* Start all over, autocommands may change the window layout. */ + wp = firstwin; + } else + wp = wp->w_next; + } + + /* Also check windows in other tab pages. */ + for (tp = first_tabpage; tp != NULL; tp = nexttp) { + nexttp = tp->tp_next; + if (tp != curtab) + for (wp = tp->tp_firstwin; wp != NULL; wp = wp->w_next) + if (wp->w_buffer == buf + && !(wp->w_closing || wp->w_buffer->b_closing) + ) { + win_close_othertab(wp, FALSE, tp); + + /* Start all over, the tab page may be closed and + * autocommands may change the window layout. */ + nexttp = first_tabpage; + break; + } + } + + --RedrawingDisabled; + + redraw_tabline = TRUE; + if (h != tabline_height()) + shell_new_rows(); +} + +/* + * Return TRUE if the current window is the only window that exists (ignoring + * "aucmd_win"). + * Returns FALSE if there is a window, possibly in another tab page. + */ +static int last_window(void) +{ + return one_window() && first_tabpage->tp_next == NULL; +} + +/* + * Return TRUE if there is only one window other than "aucmd_win" in the + * current tab page. + */ +int one_window(void) +{ + win_T *wp; + int seen_one = FALSE; + + FOR_ALL_WINDOWS(wp) + { + if (wp != aucmd_win) { + if (seen_one) + return FALSE; + seen_one = TRUE; + } + } + return TRUE; +} + +/* + * Close the possibly last window in a tab page. + * Returns TRUE when the window was closed already. + */ +static int close_last_window_tabpage(win_T *win, int free_buf, tabpage_T *prev_curtab) +{ + if (firstwin == lastwin) { + buf_T *old_curbuf = curbuf; + + /* + * Closing the last window in a tab page. First go to another tab + * page and then close the window and the tab page. This avoids that + * curwin and curtab are invalid while we are freeing memory, they may + * be used in GUI events. + * Don't trigger autocommands yet, they may use wrong values, so do + * that below. + */ + goto_tabpage_tp(alt_tabpage(), FALSE, TRUE); + redraw_tabline = TRUE; + + /* Safety check: Autocommands may have closed the window when jumping + * to the other tab page. */ + if (valid_tabpage(prev_curtab) && prev_curtab->tp_firstwin == win) { + int h = tabline_height(); + + win_close_othertab(win, free_buf, prev_curtab); + if (h != tabline_height()) + shell_new_rows(); + } + /* Since goto_tabpage_tp above did not trigger *Enter autocommands, do + * that now. */ + apply_autocmds(EVENT_WINENTER, NULL, NULL, FALSE, curbuf); + apply_autocmds(EVENT_TABENTER, NULL, NULL, FALSE, curbuf); + if (old_curbuf != curbuf) + apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf); + return TRUE; + } + return FALSE; +} + +/* + * Close window "win". Only works for the current tab page. + * If "free_buf" is TRUE related buffer may be unloaded. + * + * Called by :quit, :close, :xit, :wq and findtag(). + * Returns FAIL when the window was not closed. + */ +int win_close(win_T *win, int free_buf) +{ + win_T *wp; + int other_buffer = FALSE; + int close_curwin = FALSE; + int dir; + int help_window = FALSE; + tabpage_T *prev_curtab = curtab; + + if (last_window()) { + EMSG(_("E444: Cannot close last window")); + return FAIL; + } + + if (win->w_closing || (win->w_buffer != NULL && win->w_buffer->b_closing)) + return FAIL; /* window is already being closed */ + if (win == aucmd_win) { + EMSG(_("E813: Cannot close autocmd window")); + return FAIL; + } + if ((firstwin == aucmd_win || lastwin == aucmd_win) && one_window()) { + EMSG(_("E814: Cannot close window, only autocmd window would remain")); + return FAIL; + } + + /* When closing the last window in a tab page first go to another tab page + * and then close the window and the tab page to avoid that curwin and + * curtab are invalid while we are freeing memory. */ + if (close_last_window_tabpage(win, free_buf, prev_curtab)) + return FAIL; + + /* When closing the help window, try restoring a snapshot after closing + * the window. Otherwise clear the snapshot, it's now invalid. */ + if (win->w_buffer != NULL && win->w_buffer->b_help) + help_window = TRUE; + else + clear_snapshot(curtab, SNAP_HELP_IDX); + + if (win == curwin) { + /* + * Guess which window is going to be the new current window. + * This may change because of the autocommands (sigh). + */ + wp = frame2win(win_altframe(win, NULL)); + + /* + * Be careful: If autocommands delete the window or cause this window + * to be the last one left, return now. + */ + if (wp->w_buffer != curbuf) { + other_buffer = TRUE; + win->w_closing = TRUE; + apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, FALSE, curbuf); + if (!win_valid(win)) + return FAIL; + win->w_closing = FALSE; + if (last_window()) + return FAIL; + } + win->w_closing = TRUE; + apply_autocmds(EVENT_WINLEAVE, NULL, NULL, FALSE, curbuf); + if (!win_valid(win)) + return FAIL; + win->w_closing = FALSE; + if (last_window()) + return FAIL; + /* autocmds may abort script processing */ + if (aborting()) + return FAIL; + } + + + /* Free independent synblock before the buffer is freed. */ + if (win->w_buffer != NULL) + reset_synblock(win); + + /* + * Close the link to the buffer. + */ + if (win->w_buffer != NULL) { + win->w_closing = TRUE; + close_buffer(win, win->w_buffer, free_buf ? DOBUF_UNLOAD : 0, TRUE); + if (win_valid(win)) + win->w_closing = FALSE; + } + + if (only_one_window() && win_valid(win) && win->w_buffer == NULL + && (last_window() || curtab != prev_curtab + || close_last_window_tabpage(win, free_buf, prev_curtab))) { + /* Autocommands have close all windows, quit now. Restore + * curwin->w_buffer, otherwise writing viminfo may fail. */ + if (curwin->w_buffer == NULL) + curwin->w_buffer = curbuf; + getout(0); + } + /* Autocommands may have closed the window already, or closed the only + * other window or moved to another tab page. */ + else if (!win_valid(win) || last_window() || curtab != prev_curtab + || close_last_window_tabpage(win, free_buf, prev_curtab)) + return FAIL; + + /* Free the memory used for the window and get the window that received + * the screen space. */ + wp = win_free_mem(win, &dir, NULL); + + /* Make sure curwin isn't invalid. It can cause severe trouble when + * printing an error message. For win_equal() curbuf needs to be valid + * too. */ + if (win == curwin) { + curwin = wp; + if (wp->w_p_pvw || bt_quickfix(wp->w_buffer)) { + /* + * If the cursor goes to the preview or the quickfix window, try + * finding another window to go to. + */ + for (;; ) { + if (wp->w_next == NULL) + wp = firstwin; + else + wp = wp->w_next; + if (wp == curwin) + break; + if (!wp->w_p_pvw && !bt_quickfix(wp->w_buffer)) { + curwin = wp; + break; + } + } + } + curbuf = curwin->w_buffer; + close_curwin = TRUE; + } + if (p_ea + && (*p_ead == 'b' || *p_ead == dir) + ) + win_equal(curwin, TRUE, + dir + ); + else + win_comp_pos(); + if (close_curwin) { + win_enter_ext(wp, FALSE, TRUE, TRUE, TRUE); + if (other_buffer) + /* careful: after this wp and win may be invalid! */ + apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf); + } + + /* + * If last window has a status line now and we don't want one, + * remove the status line. + */ + last_status(FALSE); + + /* After closing the help window, try restoring the window layout from + * before it was opened. */ + if (help_window) + restore_snapshot(SNAP_HELP_IDX, close_curwin); + + + redraw_all_later(NOT_VALID); + return OK; +} + +/* + * Close window "win" in tab page "tp", which is not the current tab page. + * This may be the last window in that tab page and result in closing the tab, + * thus "tp" may become invalid! + * Caller must check if buffer is hidden and whether the tabline needs to be + * updated. + */ +void win_close_othertab(win_T *win, int free_buf, tabpage_T *tp) +{ + win_T *wp; + int dir; + tabpage_T *ptp = NULL; + int free_tp = FALSE; + + if (win->w_closing || win->w_buffer->b_closing) + return; /* window is already being closed */ + + /* Close the link to the buffer. */ + close_buffer(win, win->w_buffer, free_buf ? DOBUF_UNLOAD : 0, FALSE); + + /* Careful: Autocommands may have closed the tab page or made it the + * current tab page. */ + for (ptp = first_tabpage; ptp != NULL && ptp != tp; ptp = ptp->tp_next) + ; + if (ptp == NULL || tp == curtab) + return; + + /* Autocommands may have closed the window already. */ + for (wp = tp->tp_firstwin; wp != NULL && wp != win; wp = wp->w_next) + ; + if (wp == NULL) + return; + + /* When closing the last window in a tab page remove the tab page. */ + if (tp == NULL ? firstwin == lastwin : tp->tp_firstwin == tp->tp_lastwin) { + if (tp == first_tabpage) + first_tabpage = tp->tp_next; + else { + for (ptp = first_tabpage; ptp != NULL && ptp->tp_next != tp; + ptp = ptp->tp_next) + ; + if (ptp == NULL) { + EMSG2(_(e_intern2), "win_close_othertab()"); + return; + } + ptp->tp_next = tp->tp_next; + } + free_tp = TRUE; + } + + /* Free the memory used for the window. */ + win_free_mem(win, &dir, tp); + + if (free_tp) + free_tabpage(tp); +} + +/* + * Free the memory used for a window. + * Returns a pointer to the window that got the freed up space. + */ +static win_T * +win_free_mem ( + win_T *win, + int *dirp, /* set to 'v' or 'h' for direction if 'ea' */ + tabpage_T *tp /* tab page "win" is in, NULL for current */ +) +{ + frame_T *frp; + win_T *wp; + + /* Remove the window and its frame from the tree of frames. */ + frp = win->w_frame; + wp = winframe_remove(win, dirp, tp); + free(frp); + win_free(win, tp); + + /* When deleting the current window of another tab page select a new + * current window. */ + if (tp != NULL && win == tp->tp_curwin) + tp->tp_curwin = wp; + + return wp; +} + +#if defined(EXITFREE) || defined(PROTO) +void win_free_all(void) +{ + int dummy; + + while (first_tabpage->tp_next != NULL) + tabpage_close(TRUE); + + if (aucmd_win != NULL) { + (void)win_free_mem(aucmd_win, &dummy, NULL); + aucmd_win = NULL; + } + + while (firstwin != NULL) + (void)win_free_mem(firstwin, &dummy, NULL); +} + +#endif + +/* + * Remove a window and its frame from the tree of frames. + * Returns a pointer to the window that got the freed up space. + */ +win_T * +winframe_remove ( + win_T *win, + int *dirp, /* set to 'v' or 'h' for direction if 'ea' */ + tabpage_T *tp /* tab page "win" is in, NULL for current */ +) +{ + frame_T *frp, *frp2, *frp3; + frame_T *frp_close = win->w_frame; + win_T *wp; + + /* + * If there is only one window there is nothing to remove. + */ + if (tp == NULL ? firstwin == lastwin : tp->tp_firstwin == tp->tp_lastwin) + return NULL; + + /* + * Remove the window from its frame. + */ + frp2 = win_altframe(win, tp); + wp = frame2win(frp2); + + /* Remove this frame from the list of frames. */ + frame_remove(frp_close); + + if (frp_close->fr_parent->fr_layout == FR_COL) { + /* When 'winfixheight' is set, try to find another frame in the column + * (as close to the closed frame as possible) to distribute the height + * to. */ + if (frp2->fr_win != NULL && frp2->fr_win->w_p_wfh) { + frp = frp_close->fr_prev; + frp3 = frp_close->fr_next; + while (frp != NULL || frp3 != NULL) { + if (frp != NULL) { + if (frp->fr_win != NULL && !frp->fr_win->w_p_wfh) { + frp2 = frp; + wp = frp->fr_win; + break; + } + frp = frp->fr_prev; + } + if (frp3 != NULL) { + if (frp3->fr_win != NULL && !frp3->fr_win->w_p_wfh) { + frp2 = frp3; + wp = frp3->fr_win; + break; + } + frp3 = frp3->fr_next; + } + } + } + frame_new_height(frp2, frp2->fr_height + frp_close->fr_height, + frp2 == frp_close->fr_next ? TRUE : FALSE, FALSE); + *dirp = 'v'; + } else { + /* When 'winfixwidth' is set, try to find another frame in the column + * (as close to the closed frame as possible) to distribute the width + * to. */ + if (frp2->fr_win != NULL && frp2->fr_win->w_p_wfw) { + frp = frp_close->fr_prev; + frp3 = frp_close->fr_next; + while (frp != NULL || frp3 != NULL) { + if (frp != NULL) { + if (frp->fr_win != NULL && !frp->fr_win->w_p_wfw) { + frp2 = frp; + wp = frp->fr_win; + break; + } + frp = frp->fr_prev; + } + if (frp3 != NULL) { + if (frp3->fr_win != NULL && !frp3->fr_win->w_p_wfw) { + frp2 = frp3; + wp = frp3->fr_win; + break; + } + frp3 = frp3->fr_next; + } + } + } + frame_new_width(frp2, frp2->fr_width + frp_close->fr_width, + frp2 == frp_close->fr_next ? TRUE : FALSE, FALSE); + *dirp = 'h'; + } + + /* If rows/columns go to a window below/right its positions need to be + * updated. Can only be done after the sizes have been updated. */ + if (frp2 == frp_close->fr_next) { + int row = win->w_winrow; + int col = W_WINCOL(win); + + frame_comp_pos(frp2, &row, &col); + } + + if (frp2->fr_next == NULL && frp2->fr_prev == NULL) { + /* There is no other frame in this list, move its info to the parent + * and remove it. */ + frp2->fr_parent->fr_layout = frp2->fr_layout; + frp2->fr_parent->fr_child = frp2->fr_child; + for (frp = frp2->fr_child; frp != NULL; frp = frp->fr_next) + frp->fr_parent = frp2->fr_parent; + frp2->fr_parent->fr_win = frp2->fr_win; + if (frp2->fr_win != NULL) + frp2->fr_win->w_frame = frp2->fr_parent; + frp = frp2->fr_parent; + free(frp2); + + frp2 = frp->fr_parent; + if (frp2 != NULL && frp2->fr_layout == frp->fr_layout) { + /* The frame above the parent has the same layout, have to merge + * the frames into this list. */ + if (frp2->fr_child == frp) + frp2->fr_child = frp->fr_child; + frp->fr_child->fr_prev = frp->fr_prev; + if (frp->fr_prev != NULL) + frp->fr_prev->fr_next = frp->fr_child; + for (frp3 = frp->fr_child;; frp3 = frp3->fr_next) { + frp3->fr_parent = frp2; + if (frp3->fr_next == NULL) { + frp3->fr_next = frp->fr_next; + if (frp->fr_next != NULL) + frp->fr_next->fr_prev = frp3; + break; + } + } + free(frp); + } + } + + return wp; +} + +/* + * Find out which frame is going to get the freed up space when "win" is + * closed. + * if 'splitbelow'/'splitleft' the space goes to the window above/left. + * if 'nosplitbelow'/'nosplitleft' the space goes to the window below/right. + * This makes opening a window and closing it immediately keep the same window + * layout. + */ +static frame_T * +win_altframe ( + win_T *win, + tabpage_T *tp /* tab page "win" is in, NULL for current */ +) +{ + frame_T *frp; + int b; + + if (tp == NULL ? firstwin == lastwin : tp->tp_firstwin == tp->tp_lastwin) + /* Last window in this tab page, will go to next tab page. */ + return alt_tabpage()->tp_curwin->w_frame; + + frp = win->w_frame; + if (frp->fr_parent != NULL && frp->fr_parent->fr_layout == FR_ROW) + b = p_spr; + else + b = p_sb; + if ((!b && frp->fr_next != NULL) || frp->fr_prev == NULL) + return frp->fr_next; + return frp->fr_prev; +} + +/* + * Return the tabpage that will be used if the current one is closed. + */ +static tabpage_T *alt_tabpage(void) +{ + tabpage_T *tp; + + /* Use the next tab page if possible. */ + if (curtab->tp_next != NULL) + return curtab->tp_next; + + /* Find the last but one tab page. */ + for (tp = first_tabpage; tp->tp_next != curtab; tp = tp->tp_next) + ; + return tp; +} + +/* + * Find the left-upper window in frame "frp". + */ +static win_T *frame2win(frame_T *frp) +{ + while (frp->fr_win == NULL) + frp = frp->fr_child; + return frp->fr_win; +} + +/* + * Return TRUE if frame "frp" contains window "wp". + */ +static int frame_has_win(frame_T *frp, win_T *wp) +{ + frame_T *p; + + if (frp->fr_layout == FR_LEAF) + return frp->fr_win == wp; + + for (p = frp->fr_child; p != NULL; p = p->fr_next) + if (frame_has_win(p, wp)) + return TRUE; + return FALSE; +} + +/* + * Set a new height for a frame. Recursively sets the height for contained + * frames and windows. Caller must take care of positions. + */ +static void +frame_new_height ( + frame_T *topfrp, + int height, + int topfirst, /* resize topmost contained frame first */ + int wfh /* obey 'winfixheight' when there is a choice; + may cause the height not to be set */ +) +{ + frame_T *frp; + int extra_lines; + int h; + + if (topfrp->fr_win != NULL) { + /* Simple case: just one window. */ + win_new_height(topfrp->fr_win, + height - topfrp->fr_win->w_status_height); + } else if (topfrp->fr_layout == FR_ROW) { + do { + /* All frames in this row get the same new height. */ + for (frp = topfrp->fr_child; frp != NULL; frp = frp->fr_next) { + frame_new_height(frp, height, topfirst, wfh); + if (frp->fr_height > height) { + /* Could not fit the windows, make the whole row higher. */ + height = frp->fr_height; + break; + } + } + } while (frp != NULL); + } else { /* fr_layout == FR_COL */ + /* Complicated case: Resize a column of frames. Resize the bottom + * frame first, frames above that when needed. */ + + frp = topfrp->fr_child; + if (wfh) + /* Advance past frames with one window with 'wfh' set. */ + while (frame_fixed_height(frp)) { + frp = frp->fr_next; + if (frp == NULL) + return; /* no frame without 'wfh', give up */ + } + if (!topfirst) { + /* Find the bottom frame of this column */ + while (frp->fr_next != NULL) + frp = frp->fr_next; + if (wfh) + /* Advance back for frames with one window with 'wfh' set. */ + while (frame_fixed_height(frp)) + frp = frp->fr_prev; + } + + extra_lines = height - topfrp->fr_height; + if (extra_lines < 0) { + /* reduce height of contained frames, bottom or top frame first */ + while (frp != NULL) { + h = frame_minheight(frp, NULL); + if (frp->fr_height + extra_lines < h) { + extra_lines += frp->fr_height - h; + frame_new_height(frp, h, topfirst, wfh); + } else { + frame_new_height(frp, frp->fr_height + extra_lines, + topfirst, wfh); + break; + } + if (topfirst) { + do + frp = frp->fr_next; + while (wfh && frp != NULL && frame_fixed_height(frp)); + } else { + do + frp = frp->fr_prev; + while (wfh && frp != NULL && frame_fixed_height(frp)); + } + /* Increase "height" if we could not reduce enough frames. */ + if (frp == NULL) + height -= extra_lines; + } + } else if (extra_lines > 0) { + /* increase height of bottom or top frame */ + frame_new_height(frp, frp->fr_height + extra_lines, topfirst, wfh); + } + } + topfrp->fr_height = height; +} + +/* + * Return TRUE if height of frame "frp" should not be changed because of + * the 'winfixheight' option. + */ +static int frame_fixed_height(frame_T *frp) +{ + /* frame with one window: fixed height if 'winfixheight' set. */ + if (frp->fr_win != NULL) + return frp->fr_win->w_p_wfh; + + if (frp->fr_layout == FR_ROW) { + /* The frame is fixed height if one of the frames in the row is fixed + * height. */ + for (frp = frp->fr_child; frp != NULL; frp = frp->fr_next) + if (frame_fixed_height(frp)) + return TRUE; + return FALSE; + } + + /* frp->fr_layout == FR_COL: The frame is fixed height if all of the + * frames in the row are fixed height. */ + for (frp = frp->fr_child; frp != NULL; frp = frp->fr_next) + if (!frame_fixed_height(frp)) + return FALSE; + return TRUE; +} + +/* + * Return TRUE if width of frame "frp" should not be changed because of + * the 'winfixwidth' option. + */ +static int frame_fixed_width(frame_T *frp) +{ + /* frame with one window: fixed width if 'winfixwidth' set. */ + if (frp->fr_win != NULL) + return frp->fr_win->w_p_wfw; + + if (frp->fr_layout == FR_COL) { + /* The frame is fixed width if one of the frames in the row is fixed + * width. */ + for (frp = frp->fr_child; frp != NULL; frp = frp->fr_next) + if (frame_fixed_width(frp)) + return TRUE; + return FALSE; + } + + /* frp->fr_layout == FR_ROW: The frame is fixed width if all of the + * frames in the row are fixed width. */ + for (frp = frp->fr_child; frp != NULL; frp = frp->fr_next) + if (!frame_fixed_width(frp)) + return FALSE; + return TRUE; +} + +/* + * Add a status line to windows at the bottom of "frp". + * Note: Does not check if there is room! + */ +static void frame_add_statusline(frame_T *frp) +{ + win_T *wp; + + if (frp->fr_layout == FR_LEAF) { + wp = frp->fr_win; + if (wp->w_status_height == 0) { + if (wp->w_height > 0) /* don't make it negative */ + --wp->w_height; + wp->w_status_height = STATUS_HEIGHT; + } + } else if (frp->fr_layout == FR_ROW) { + /* Handle all the frames in the row. */ + for (frp = frp->fr_child; frp != NULL; frp = frp->fr_next) + frame_add_statusline(frp); + } else { /* frp->fr_layout == FR_COL */ + /* Only need to handle the last frame in the column. */ + for (frp = frp->fr_child; frp->fr_next != NULL; frp = frp->fr_next) + ; + frame_add_statusline(frp); + } +} + +/* + * Set width of a frame. Handles recursively going through contained frames. + * May remove separator line for windows at the right side (for win_close()). + */ +static void +frame_new_width ( + frame_T *topfrp, + int width, + int leftfirst, /* resize leftmost contained frame first */ + int wfw /* obey 'winfixwidth' when there is a choice; + may cause the width not to be set */ +) +{ + frame_T *frp; + int extra_cols; + int w; + win_T *wp; + + if (topfrp->fr_layout == FR_LEAF) { + /* Simple case: just one window. */ + wp = topfrp->fr_win; + /* Find out if there are any windows right of this one. */ + for (frp = topfrp; frp->fr_parent != NULL; frp = frp->fr_parent) + if (frp->fr_parent->fr_layout == FR_ROW && frp->fr_next != NULL) + break; + if (frp->fr_parent == NULL) + wp->w_vsep_width = 0; + win_new_width(wp, width - wp->w_vsep_width); + } else if (topfrp->fr_layout == FR_COL) { + do { + /* All frames in this column get the same new width. */ + for (frp = topfrp->fr_child; frp != NULL; frp = frp->fr_next) { + frame_new_width(frp, width, leftfirst, wfw); + if (frp->fr_width > width) { + /* Could not fit the windows, make whole column wider. */ + width = frp->fr_width; + break; + } + } + } while (frp != NULL); + } else { /* fr_layout == FR_ROW */ + /* Complicated case: Resize a row of frames. Resize the rightmost + * frame first, frames left of it when needed. */ + + frp = topfrp->fr_child; + if (wfw) + /* Advance past frames with one window with 'wfw' set. */ + while (frame_fixed_width(frp)) { + frp = frp->fr_next; + if (frp == NULL) + return; /* no frame without 'wfw', give up */ + } + if (!leftfirst) { + /* Find the rightmost frame of this row */ + while (frp->fr_next != NULL) + frp = frp->fr_next; + if (wfw) + /* Advance back for frames with one window with 'wfw' set. */ + while (frame_fixed_width(frp)) + frp = frp->fr_prev; + } + + extra_cols = width - topfrp->fr_width; + if (extra_cols < 0) { + /* reduce frame width, rightmost frame first */ + while (frp != NULL) { + w = frame_minwidth(frp, NULL); + if (frp->fr_width + extra_cols < w) { + extra_cols += frp->fr_width - w; + frame_new_width(frp, w, leftfirst, wfw); + } else { + frame_new_width(frp, frp->fr_width + extra_cols, + leftfirst, wfw); + break; + } + if (leftfirst) { + do + frp = frp->fr_next; + while (wfw && frp != NULL && frame_fixed_width(frp)); + } else { + do + frp = frp->fr_prev; + while (wfw && frp != NULL && frame_fixed_width(frp)); + } + /* Increase "width" if we could not reduce enough frames. */ + if (frp == NULL) + width -= extra_cols; + } + } else if (extra_cols > 0) { + /* increase width of rightmost frame */ + frame_new_width(frp, frp->fr_width + extra_cols, leftfirst, wfw); + } + } + topfrp->fr_width = width; +} + +/* + * Add the vertical separator to windows at the right side of "frp". + * Note: Does not check if there is room! + */ +static void frame_add_vsep(frame_T *frp) +{ + win_T *wp; + + if (frp->fr_layout == FR_LEAF) { + wp = frp->fr_win; + if (wp->w_vsep_width == 0) { + if (wp->w_width > 0) /* don't make it negative */ + --wp->w_width; + wp->w_vsep_width = 1; + } + } else if (frp->fr_layout == FR_COL) { + /* Handle all the frames in the column. */ + for (frp = frp->fr_child; frp != NULL; frp = frp->fr_next) + frame_add_vsep(frp); + } else { /* frp->fr_layout == FR_ROW */ + /* Only need to handle the last frame in the row. */ + frp = frp->fr_child; + while (frp->fr_next != NULL) + frp = frp->fr_next; + frame_add_vsep(frp); + } +} + +/* + * Set frame width from the window it contains. + */ +static void frame_fix_width(win_T *wp) +{ + wp->w_frame->fr_width = wp->w_width + wp->w_vsep_width; +} + +/* + * Set frame height from the window it contains. + */ +static void frame_fix_height(win_T *wp) +{ + wp->w_frame->fr_height = wp->w_height + wp->w_status_height; +} + +/* + * Compute the minimal height for frame "topfrp". + * Uses the 'winminheight' option. + * When "next_curwin" isn't NULL, use p_wh for this window. + * When "next_curwin" is NOWIN, don't use at least one line for the current + * window. + */ +static int frame_minheight(frame_T *topfrp, win_T *next_curwin) +{ + frame_T *frp; + int m; + int n; + + if (topfrp->fr_win != NULL) { + if (topfrp->fr_win == next_curwin) + m = p_wh + topfrp->fr_win->w_status_height; + else { + /* window: minimal height of the window plus status line */ + m = p_wmh + topfrp->fr_win->w_status_height; + /* Current window is minimal one line high */ + if (p_wmh == 0 && topfrp->fr_win == curwin && next_curwin == NULL) + ++m; + } + } else if (topfrp->fr_layout == FR_ROW) { + /* get the minimal height from each frame in this row */ + m = 0; + for (frp = topfrp->fr_child; frp != NULL; frp = frp->fr_next) { + n = frame_minheight(frp, next_curwin); + if (n > m) + m = n; + } + } else { + /* Add up the minimal heights for all frames in this column. */ + m = 0; + for (frp = topfrp->fr_child; frp != NULL; frp = frp->fr_next) + m += frame_minheight(frp, next_curwin); + } + + return m; +} + +/* + * Compute the minimal width for frame "topfrp". + * When "next_curwin" isn't NULL, use p_wiw for this window. + * When "next_curwin" is NOWIN, don't use at least one column for the current + * window. + */ +static int +frame_minwidth ( + frame_T *topfrp, + win_T *next_curwin /* use p_wh and p_wiw for next_curwin */ +) +{ + frame_T *frp; + int m, n; + + if (topfrp->fr_win != NULL) { + if (topfrp->fr_win == next_curwin) + m = p_wiw + topfrp->fr_win->w_vsep_width; + else { + /* window: minimal width of the window plus separator column */ + m = p_wmw + topfrp->fr_win->w_vsep_width; + /* Current window is minimal one column wide */ + if (p_wmw == 0 && topfrp->fr_win == curwin && next_curwin == NULL) + ++m; + } + } else if (topfrp->fr_layout == FR_COL) { + /* get the minimal width from each frame in this column */ + m = 0; + for (frp = topfrp->fr_child; frp != NULL; frp = frp->fr_next) { + n = frame_minwidth(frp, next_curwin); + if (n > m) + m = n; + } + } else { + /* Add up the minimal widths for all frames in this row. */ + m = 0; + for (frp = topfrp->fr_child; frp != NULL; frp = frp->fr_next) + m += frame_minwidth(frp, next_curwin); + } + + return m; +} + + +/* + * Try to close all windows except current one. + * Buffers in the other windows become hidden if 'hidden' is set, or '!' is + * used and the buffer was modified. + * + * Used by ":bdel" and ":only". + */ +void +close_others ( + int message, + int forceit /* always hide all other windows */ +) +{ + win_T *wp; + win_T *nextwp; + int r; + + if (one_window()) { + if (message + && !autocmd_busy + ) + MSG(_(m_onlyone)); + return; + } + + /* Be very careful here: autocommands may change the window layout. */ + for (wp = firstwin; win_valid(wp); wp = nextwp) { + nextwp = wp->w_next; + if (wp != curwin) { /* don't close current window */ + + /* Check if it's allowed to abandon this window */ + r = can_abandon(wp->w_buffer, forceit); + if (!win_valid(wp)) { /* autocommands messed wp up */ + nextwp = firstwin; + continue; + } + if (!r) { + if (message && (p_confirm || cmdmod.confirm) && p_write) { + dialog_changed(wp->w_buffer, FALSE); + if (!win_valid(wp)) { /* autocommands messed wp up */ + nextwp = firstwin; + continue; + } + } + if (bufIsChanged(wp->w_buffer)) + continue; + } + win_close(wp, !P_HID(wp->w_buffer) && !bufIsChanged(wp->w_buffer)); + } + } + + if (message && lastwin != firstwin) + EMSG(_("E445: Other window contains changes")); +} + + +/* + * Init the current window "curwin". + * Called when a new file is being edited. + */ +void curwin_init(void) +{ + win_init_empty(curwin); +} + +void win_init_empty(win_T *wp) +{ + redraw_win_later(wp, NOT_VALID); + wp->w_lines_valid = 0; + wp->w_cursor.lnum = 1; + wp->w_curswant = wp->w_cursor.col = 0; + wp->w_cursor.coladd = 0; + wp->w_pcmark.lnum = 1; /* pcmark not cleared but set to line 1 */ + wp->w_pcmark.col = 0; + wp->w_prev_pcmark.lnum = 0; + wp->w_prev_pcmark.col = 0; + wp->w_topline = 1; + wp->w_topfill = 0; + wp->w_botline = 2; + if (wp->w_p_rl) + wp->w_farsi = W_CONV + W_R_L; + else + wp->w_farsi = W_CONV; + wp->w_s = &wp->w_buffer->b_s; +} + +/* + * Allocate the first window and put an empty buffer in it. + * Called from main(). + * + * Return FAIL when something goes wrong. + */ +int win_alloc_first(void) +{ + if (win_alloc_firstwin(NULL) == FAIL) + return FAIL; + + first_tabpage = alloc_tabpage(); + first_tabpage->tp_topframe = topframe; + curtab = first_tabpage; + + return OK; +} + +/* + * Init "aucmd_win". This can only be done after the first + * window is fully initialized, thus it can't be in win_alloc_first(). + */ +void win_alloc_aucmd_win(void) +{ + aucmd_win = win_alloc(NULL, TRUE); + win_init_some(aucmd_win, curwin); + RESET_BINDING(aucmd_win); + new_frame(aucmd_win); +} + +/* + * Allocate the first window or the first window in a new tab page. + * When "oldwin" is NULL create an empty buffer for it. + * When "oldwin" is not NULL copy info from it to the new window (only with + * FEAT_WINDOWS). + * Return FAIL when something goes wrong (out of memory). + */ +static int win_alloc_firstwin(win_T *oldwin) +{ + curwin = win_alloc(NULL, FALSE); + if (oldwin == NULL) { + /* Very first window, need to create an empty buffer for it and + * initialize from scratch. */ + curbuf = buflist_new(NULL, NULL, 1L, BLN_LISTED); + if (curbuf == NULL) + return FAIL; + curwin->w_buffer = curbuf; + curwin->w_s = &(curbuf->b_s); + curbuf->b_nwindows = 1; /* there is one window */ + curwin->w_alist = &global_alist; + curwin_init(); /* init current window */ + } else { + /* First window in new tab page, initialize it from "oldwin". */ + win_init(curwin, oldwin, 0); + + /* We don't want cursor- and scroll-binding in the first window. */ + RESET_BINDING(curwin); + } + + new_frame(curwin); + topframe = curwin->w_frame; + topframe->fr_width = Columns; + topframe->fr_height = Rows - p_ch; + topframe->fr_win = curwin; + + return OK; +} + +/* + * Create a frame for window "wp". + */ +static void new_frame(win_T *wp) +{ + frame_T *frp = xcalloc(1, sizeof(frame_T)); + + wp->w_frame = frp; + frp->fr_layout = FR_LEAF; + frp->fr_win = wp; +} + +/* + * Initialize the window and frame size to the maximum. + */ +void win_init_size(void) +{ + firstwin->w_height = ROWS_AVAIL; + topframe->fr_height = ROWS_AVAIL; + firstwin->w_width = Columns; + topframe->fr_width = Columns; +} + +/* + * Allocate a new tabpage_T and init the values. + */ +static tabpage_T *alloc_tabpage(void) +{ + tabpage_T *tp = xcalloc(1, sizeof(tabpage_T)); + + /* init t: variables */ + tp->tp_vars = dict_alloc(); + init_var_dict(tp->tp_vars, &tp->tp_winvar, VAR_SCOPE); + tp->tp_diff_invalid = TRUE; + tp->tp_ch_used = p_ch; + + return tp; +} + +void free_tabpage(tabpage_T *tp) +{ + int idx; + + diff_clear(tp); + for (idx = 0; idx < SNAP_COUNT; ++idx) + clear_snapshot(tp, idx); + vars_clear(&tp->tp_vars->dv_hashtab); /* free all t: variables */ + hash_init(&tp->tp_vars->dv_hashtab); + unref_var_dict(tp->tp_vars); + + + + free(tp); +} + +/* + * Create a new Tab page with one window. + * It will edit the current buffer, like after ":split". + * When "after" is 0 put it just after the current Tab page. + * Otherwise put it just before tab page "after". + * Return FAIL or OK. + */ +int win_new_tabpage(int after) +{ + tabpage_T *tp = curtab; + tabpage_T *newtp; + int n; + + newtp = alloc_tabpage(); + + /* Remember the current windows in this Tab page. */ + if (leave_tabpage(curbuf, TRUE) == FAIL) { + free(newtp); + return FAIL; + } + curtab = newtp; + + /* Create a new empty window. */ + if (win_alloc_firstwin(tp->tp_curwin) == OK) { + /* Make the new Tab page the new topframe. */ + if (after == 1) { + /* New tab page becomes the first one. */ + newtp->tp_next = first_tabpage; + first_tabpage = newtp; + } else { + if (after > 0) { + /* Put new tab page before tab page "after". */ + n = 2; + for (tp = first_tabpage; tp->tp_next != NULL + && n < after; tp = tp->tp_next) + ++n; + } + newtp->tp_next = tp->tp_next; + tp->tp_next = newtp; + } + win_init_size(); + firstwin->w_winrow = tabline_height(); + win_comp_scroll(curwin); + + newtp->tp_topframe = topframe; + last_status(FALSE); + + + redraw_all_later(CLEAR); + apply_autocmds(EVENT_WINENTER, NULL, NULL, FALSE, curbuf); + apply_autocmds(EVENT_TABENTER, NULL, NULL, FALSE, curbuf); + return OK; + } + + /* Failed, get back the previous Tab page */ + enter_tabpage(curtab, curbuf, TRUE, TRUE); + return FAIL; +} + +/* + * Open a new tab page if ":tab cmd" was used. It will edit the same buffer, + * like with ":split". + * Returns OK if a new tab page was created, FAIL otherwise. + */ +int may_open_tabpage(void) +{ + int n = (cmdmod.tab == 0) ? postponed_split_tab : cmdmod.tab; + + if (n != 0) { + cmdmod.tab = 0; /* reset it to avoid doing it twice */ + postponed_split_tab = 0; + return win_new_tabpage(n); + } + return FAIL; +} + +/* + * Create up to "maxcount" tabpages with empty windows. + * Returns the number of resulting tab pages. + */ +int make_tabpages(int maxcount) +{ + int count = maxcount; + int todo; + + /* Limit to 'tabpagemax' tabs. */ + if (count > p_tpm) + count = p_tpm; + + /* + * Don't execute autocommands while creating the tab pages. Must do that + * when putting the buffers in the windows. + */ + block_autocmds(); + + for (todo = count - 1; todo > 0; --todo) + if (win_new_tabpage(0) == FAIL) + break; + + unblock_autocmds(); + + /* return actual number of tab pages */ + return count - todo; +} + +/* + * Return TRUE when "tpc" points to a valid tab page. + */ +int valid_tabpage(tabpage_T *tpc) +{ + tabpage_T *tp; + + for (tp = first_tabpage; tp != NULL; tp = tp->tp_next) + if (tp == tpc) + return TRUE; + return FALSE; +} + +/* + * Find tab page "n" (first one is 1). Returns NULL when not found. + */ +tabpage_T *find_tabpage(int n) +{ + tabpage_T *tp; + int i = 1; + + for (tp = first_tabpage; tp != NULL && i != n; tp = tp->tp_next) + ++i; + return tp; +} + +/* + * Get index of tab page "tp". First one has index 1. + * When not found returns number of tab pages plus one. + */ +int tabpage_index(tabpage_T *ftp) +{ + int i = 1; + tabpage_T *tp; + + for (tp = first_tabpage; tp != NULL && tp != ftp; tp = tp->tp_next) + ++i; + return i; +} + +/* + * Prepare for leaving the current tab page. + * When autocommands change "curtab" we don't leave the tab page and return + * FAIL. + * Careful: When OK is returned need to get a new tab page very very soon! + */ +static int +leave_tabpage ( + buf_T *new_curbuf, /* what is going to be the new curbuf, + NULL if unknown */ + int trigger_leave_autocmds +) +{ + tabpage_T *tp = curtab; + + reset_VIsual_and_resel(); /* stop Visual mode */ + if (trigger_leave_autocmds) { + if (new_curbuf != curbuf) { + apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, FALSE, curbuf); + if (curtab != tp) + return FAIL; + } + apply_autocmds(EVENT_WINLEAVE, NULL, NULL, FALSE, curbuf); + if (curtab != tp) + return FAIL; + apply_autocmds(EVENT_TABLEAVE, NULL, NULL, FALSE, curbuf); + if (curtab != tp) + return FAIL; + } + tp->tp_curwin = curwin; + tp->tp_prevwin = prevwin; + tp->tp_firstwin = firstwin; + tp->tp_lastwin = lastwin; + tp->tp_old_Rows = Rows; + tp->tp_old_Columns = Columns; + firstwin = NULL; + lastwin = NULL; + return OK; +} + +/* + * Start using tab page "tp". + * Only to be used after leave_tabpage() or freeing the current tab page. + * Only trigger *Enter autocommands when trigger_enter_autocmds is TRUE. + * Only trigger *Leave autocommands when trigger_leave_autocmds is TRUE. + */ +static void enter_tabpage(tabpage_T *tp, buf_T *old_curbuf, int trigger_enter_autocmds, int trigger_leave_autocmds) +{ + int old_off = tp->tp_firstwin->w_winrow; + win_T *next_prevwin = tp->tp_prevwin; + + curtab = tp; + firstwin = tp->tp_firstwin; + lastwin = tp->tp_lastwin; + topframe = tp->tp_topframe; + + /* We would like doing the TabEnter event first, but we don't have a + * valid current window yet, which may break some commands. + * This triggers autocommands, thus may make "tp" invalid. */ + win_enter_ext(tp->tp_curwin, FALSE, TRUE, + trigger_enter_autocmds, trigger_leave_autocmds); + prevwin = next_prevwin; + + last_status(FALSE); /* status line may appear or disappear */ + (void)win_comp_pos(); /* recompute w_winrow for all windows */ + must_redraw = CLEAR; /* need to redraw everything */ + diff_need_scrollbind = TRUE; + + /* The tabpage line may have appeared or disappeared, may need to resize + * the frames for that. When the Vim window was resized need to update + * frame sizes too. Use the stored value of p_ch, so that it can be + * different for each tab page. */ + p_ch = curtab->tp_ch_used; + if (curtab->tp_old_Rows != Rows || (old_off != firstwin->w_winrow + )) + shell_new_rows(); + if (curtab->tp_old_Columns != Columns && starting == 0) + shell_new_columns(); /* update window widths */ + + + /* Apply autocommands after updating the display, when 'rows' and + * 'columns' have been set correctly. */ + if (trigger_enter_autocmds) { + apply_autocmds(EVENT_TABENTER, NULL, NULL, FALSE, curbuf); + if (old_curbuf != curbuf) + apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf); + } + + redraw_all_later(CLEAR); +} + +/* + * Go to tab page "n". For ":tab N" and "Ngt". + * When "n" is 9999 go to the last tab page. + */ +void goto_tabpage(int n) +{ + tabpage_T *tp; + tabpage_T *ttp; + int i; + + if (text_locked()) { + /* Not allowed when editing the command line. */ + if (cmdwin_type != 0) + EMSG(_(e_cmdwin)); + else + EMSG(_(e_secure)); + return; + } + + /* If there is only one it can't work. */ + if (first_tabpage->tp_next == NULL) { + if (n > 1) + beep_flush(); + return; + } + + if (n == 0) { + /* No count, go to next tab page, wrap around end. */ + if (curtab->tp_next == NULL) + tp = first_tabpage; + else + tp = curtab->tp_next; + } else if (n < 0) { + /* "gT": go to previous tab page, wrap around end. "N gT" repeats + * this N times. */ + ttp = curtab; + for (i = n; i < 0; ++i) { + for (tp = first_tabpage; tp->tp_next != ttp && tp->tp_next != NULL; + tp = tp->tp_next) + ; + ttp = tp; + } + } else if (n == 9999) { + /* Go to last tab page. */ + for (tp = first_tabpage; tp->tp_next != NULL; tp = tp->tp_next) + ; + } else { + /* Go to tab page "n". */ + tp = find_tabpage(n); + if (tp == NULL) { + beep_flush(); + return; + } + } + + goto_tabpage_tp(tp, TRUE, TRUE); + +} + +/* + * Go to tabpage "tp". + * Only trigger *Enter autocommands when trigger_enter_autocmds is TRUE. + * Only trigger *Leave autocommands when trigger_leave_autocmds is TRUE. + * Note: doesn't update the GUI tab. + */ +void goto_tabpage_tp(tabpage_T *tp, int trigger_enter_autocmds, int trigger_leave_autocmds) +{ + /* Don't repeat a message in another tab page. */ + set_keep_msg(NULL, 0); + + if (tp != curtab && leave_tabpage(tp->tp_curwin->w_buffer, + trigger_leave_autocmds) == OK) { + if (valid_tabpage(tp)) + enter_tabpage(tp, curbuf, trigger_enter_autocmds, + trigger_leave_autocmds); + else + enter_tabpage(curtab, curbuf, trigger_enter_autocmds, + trigger_leave_autocmds); + } +} + +/* + * Enter window "wp" in tab page "tp". + * Also updates the GUI tab. + */ +void goto_tabpage_win(tabpage_T *tp, win_T *wp) +{ + goto_tabpage_tp(tp, TRUE, TRUE); + if (curtab == tp && win_valid(wp)) { + win_enter(wp, TRUE); + } +} + +/* + * Move the current tab page to before tab page "nr". + */ +void tabpage_move(int nr) +{ + int n = nr; + tabpage_T *tp; + + if (first_tabpage->tp_next == NULL) + return; + + /* Remove the current tab page from the list of tab pages. */ + if (curtab == first_tabpage) + first_tabpage = curtab->tp_next; + else { + for (tp = first_tabpage; tp != NULL; tp = tp->tp_next) + if (tp->tp_next == curtab) + break; + if (tp == NULL) /* "cannot happen" */ + return; + tp->tp_next = curtab->tp_next; + } + + /* Re-insert it at the specified position. */ + if (n <= 0) { + curtab->tp_next = first_tabpage; + first_tabpage = curtab; + } else { + for (tp = first_tabpage; tp->tp_next != NULL && n > 1; tp = tp->tp_next) + --n; + curtab->tp_next = tp->tp_next; + tp->tp_next = curtab; + } + + /* Need to redraw the tabline. Tab page contents doesn't change. */ + redraw_tabline = TRUE; +} + + +/* + * Go to another window. + * When jumping to another buffer, stop Visual mode. Do this before + * changing windows so we can yank the selection into the '*' register. + * When jumping to another window on the same buffer, adjust its cursor + * position to keep the same Visual area. + */ +void win_goto(win_T *wp) +{ + win_T *owp = curwin; + + if (text_locked()) { + beep_flush(); + text_locked_msg(); + return; + } + if (curbuf_locked()) + return; + + if (wp->w_buffer != curbuf) + reset_VIsual_and_resel(); + else if (VIsual_active) + wp->w_cursor = curwin->w_cursor; + + win_enter(wp, TRUE); + + /* Conceal cursor line in previous window, unconceal in current window. */ + if (win_valid(owp) && owp->w_p_cole > 0 && !msg_scrolled) + update_single_line(owp, owp->w_cursor.lnum); + if (curwin->w_p_cole > 0 && !msg_scrolled) + need_cursor_line_redraw = TRUE; +} + + +/* + * Find the tabpage for window "win". + */ +tabpage_T *win_find_tabpage(win_T *win) +{ + win_T *wp; + tabpage_T *tp; + + for (tp = first_tabpage; tp != NULL; tp = tp->tp_next) + for (wp = (tp == curtab ? firstwin : tp->tp_firstwin); + wp != NULL; wp = wp->w_next) + if (wp == win) + return tp; + return NULL; +} + +/* + * Move to window above or below "count" times. + */ +static void +win_goto_ver ( + int up, /* TRUE to go to win above */ + long count +) +{ + frame_T *fr; + frame_T *nfr; + frame_T *foundfr; + + foundfr = curwin->w_frame; + while (count--) { + /* + * First go upwards in the tree of frames until we find a upwards or + * downwards neighbor. + */ + fr = foundfr; + for (;; ) { + if (fr == topframe) + goto end; + if (up) + nfr = fr->fr_prev; + else + nfr = fr->fr_next; + if (fr->fr_parent->fr_layout == FR_COL && nfr != NULL) + break; + fr = fr->fr_parent; + } + + /* + * Now go downwards to find the bottom or top frame in it. + */ + for (;; ) { + if (nfr->fr_layout == FR_LEAF) { + foundfr = nfr; + break; + } + fr = nfr->fr_child; + if (nfr->fr_layout == FR_ROW) { + /* Find the frame at the cursor row. */ + while (fr->fr_next != NULL + && frame2win(fr)->w_wincol + fr->fr_width + <= curwin->w_wincol + curwin->w_wcol) + fr = fr->fr_next; + } + if (nfr->fr_layout == FR_COL && up) + while (fr->fr_next != NULL) + fr = fr->fr_next; + nfr = fr; + } + } +end: + if (foundfr != NULL) + win_goto(foundfr->fr_win); +} + +/* + * Move to left or right window. + */ +static void +win_goto_hor ( + int left, /* TRUE to go to left win */ + long count +) +{ + frame_T *fr; + frame_T *nfr; + frame_T *foundfr; + + foundfr = curwin->w_frame; + while (count--) { + /* + * First go upwards in the tree of frames until we find a left or + * right neighbor. + */ + fr = foundfr; + for (;; ) { + if (fr == topframe) + goto end; + if (left) + nfr = fr->fr_prev; + else + nfr = fr->fr_next; + if (fr->fr_parent->fr_layout == FR_ROW && nfr != NULL) + break; + fr = fr->fr_parent; + } + + /* + * Now go downwards to find the leftmost or rightmost frame in it. + */ + for (;; ) { + if (nfr->fr_layout == FR_LEAF) { + foundfr = nfr; + break; + } + fr = nfr->fr_child; + if (nfr->fr_layout == FR_COL) { + /* Find the frame at the cursor row. */ + while (fr->fr_next != NULL + && frame2win(fr)->w_winrow + fr->fr_height + <= curwin->w_winrow + curwin->w_wrow) + fr = fr->fr_next; + } + if (nfr->fr_layout == FR_ROW && left) + while (fr->fr_next != NULL) + fr = fr->fr_next; + nfr = fr; + } + } +end: + if (foundfr != NULL) + win_goto(foundfr->fr_win); +} + +/* + * Make window "wp" the current window. + */ +void win_enter(win_T *wp, int undo_sync) +{ + win_enter_ext(wp, undo_sync, FALSE, TRUE, TRUE); +} + +/* + * Make window wp the current window. + * Can be called with "curwin_invalid" TRUE, which means that curwin has just + * been closed and isn't valid. + */ +static void win_enter_ext(win_T *wp, int undo_sync, int curwin_invalid, int trigger_enter_autocmds, int trigger_leave_autocmds) +{ + int other_buffer = FALSE; + + if (wp == curwin && !curwin_invalid) /* nothing to do */ + return; + + if (!curwin_invalid && trigger_leave_autocmds) { + /* + * Be careful: If autocommands delete the window, return now. + */ + if (wp->w_buffer != curbuf) { + apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, FALSE, curbuf); + other_buffer = TRUE; + if (!win_valid(wp)) + return; + } + apply_autocmds(EVENT_WINLEAVE, NULL, NULL, FALSE, curbuf); + if (!win_valid(wp)) + return; + /* autocmds may abort script processing */ + if (aborting()) + return; + } + + /* sync undo before leaving the current buffer */ + if (undo_sync && curbuf != wp->w_buffer) + u_sync(FALSE); + /* may have to copy the buffer options when 'cpo' contains 'S' */ + if (wp->w_buffer != curbuf) + buf_copy_options(wp->w_buffer, BCO_ENTER | BCO_NOHELP); + if (!curwin_invalid) { + prevwin = curwin; /* remember for CTRL-W p */ + curwin->w_redr_status = TRUE; + } + curwin = wp; + curbuf = wp->w_buffer; + check_cursor(); + if (!virtual_active()) + curwin->w_cursor.coladd = 0; + changed_line_abv_curs(); /* assume cursor position needs updating */ + + if (curwin->w_localdir != NULL) { + /* Window has a local directory: Save current directory as global + * directory (unless that was done already) and change to the local + * directory. */ + if (globaldir == NULL) { + char_u cwd[MAXPATHL]; + + if (os_dirname(cwd, MAXPATHL) == OK) + globaldir = vim_strsave(cwd); + } + if (os_chdir((char *)curwin->w_localdir) == 0) + shorten_fnames(TRUE); + } else if (globaldir != NULL) { + /* Window doesn't have a local directory and we are not in the global + * directory: Change to the global directory. */ + ignored = os_chdir((char *)globaldir); + free(globaldir); + globaldir = NULL; + shorten_fnames(TRUE); + } + + if (trigger_enter_autocmds) { + apply_autocmds(EVENT_WINENTER, NULL, NULL, FALSE, curbuf); + if (other_buffer) + apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf); + } + + maketitle(); + curwin->w_redr_status = TRUE; + redraw_tabline = TRUE; + if (restart_edit) + redraw_later(VALID); /* causes status line redraw */ + + /* set window height to desired minimal value */ + if (curwin->w_height < p_wh && !curwin->w_p_wfh) + win_setheight((int)p_wh); + else if (curwin->w_height == 0) + win_setheight(1); + + /* set window width to desired minimal value */ + if (curwin->w_width < p_wiw && !curwin->w_p_wfw) + win_setwidth((int)p_wiw); + + setmouse(); /* in case jumped to/from help buffer */ + + /* Change directories when the 'acd' option is set. */ + do_autochdir(); +} + + +/* + * Jump to the first open window that contains buffer "buf", if one exists. + * Returns a pointer to the window found, otherwise NULL. + */ +win_T *buf_jump_open_win(buf_T *buf) +{ + win_T *wp; + + for (wp = firstwin; wp != NULL; wp = wp->w_next) + if (wp->w_buffer == buf) + break; + if (wp != NULL) + win_enter(wp, FALSE); + return wp; +} + +/* + * Jump to the first open window in any tab page that contains buffer "buf", + * if one exists. + * Returns a pointer to the window found, otherwise NULL. + */ +win_T *buf_jump_open_tab(buf_T *buf) +{ + win_T *wp; + tabpage_T *tp; + + /* First try the current tab page. */ + wp = buf_jump_open_win(buf); + if (wp != NULL) + return wp; + + for (tp = first_tabpage; tp != NULL; tp = tp->tp_next) + if (tp != curtab) { + for (wp = tp->tp_firstwin; wp != NULL; wp = wp->w_next) + if (wp->w_buffer == buf) + break; + if (wp != NULL) { + goto_tabpage_win(tp, wp); + if (curwin != wp) + wp = NULL; /* something went wrong */ + break; + } + } + + return wp; +} + +/* + * Allocate a window structure and link it in the window list when "hidden" is + * FALSE. + */ +static win_T *win_alloc(win_T *after, int hidden) +{ + /* + * allocate window structure and linesizes arrays + */ + win_T *new_wp = xcalloc(1, sizeof(win_T)); + win_alloc_lines(new_wp); + + /* init w: variables */ + new_wp->w_vars = dict_alloc(); + init_var_dict(new_wp->w_vars, &new_wp->w_winvar, VAR_SCOPE); + + /* Don't execute autocommands while the window is not properly + * initialized yet. gui_create_scrollbar() may trigger a FocusGained + * event. */ + block_autocmds(); + /* + * link the window in the window list + */ + if (!hidden) + win_append(after, new_wp); + new_wp->w_wincol = 0; + new_wp->w_width = Columns; + + /* position the display and the cursor at the top of the file. */ + new_wp->w_topline = 1; + new_wp->w_topfill = 0; + new_wp->w_botline = 2; + new_wp->w_cursor.lnum = 1; + new_wp->w_scbind_pos = 1; + + /* We won't calculate w_fraction until resizing the window */ + new_wp->w_fraction = 0; + new_wp->w_prev_fraction_row = -1; + + foldInitWin(new_wp); + unblock_autocmds(); + new_wp->w_match_head = NULL; + new_wp->w_next_match_id = 4; + return new_wp; +} + + +/* + * Remove window 'wp' from the window list and free the structure. + */ +static void +win_free ( + win_T *wp, + tabpage_T *tp /* tab page "win" is in, NULL for current */ +) +{ + int i; + buf_T *buf; + wininfo_T *wip; + + clearFolding(wp); + + /* reduce the reference count to the argument list. */ + alist_unlink(wp->w_alist); + + /* Don't execute autocommands while the window is halfway being deleted. + * gui_mch_destroy_scrollbar() may trigger a FocusGained event. */ + block_autocmds(); + + + + + + + + + clear_winopt(&wp->w_onebuf_opt); + clear_winopt(&wp->w_allbuf_opt); + + vars_clear(&wp->w_vars->dv_hashtab); /* free all w: variables */ + hash_init(&wp->w_vars->dv_hashtab); + unref_var_dict(wp->w_vars); + + if (prevwin == wp) + prevwin = NULL; + win_free_lsize(wp); + + for (i = 0; i < wp->w_tagstacklen; ++i) + free(wp->w_tagstack[i].tagname); + + free(wp->w_localdir); + + /* Remove the window from the b_wininfo lists, it may happen that the + * freed memory is re-used for another window. */ + for (buf = firstbuf; buf != NULL; buf = buf->b_next) + for (wip = buf->b_wininfo; wip != NULL; wip = wip->wi_next) + if (wip->wi_win == wp) + wip->wi_win = NULL; + + clear_matches(wp); + + free_jumplist(wp); + + qf_free_all(wp); + + + free(wp->w_p_cc_cols); + + if (wp != aucmd_win) + win_remove(wp, tp); + free(wp); + + unblock_autocmds(); +} + +/* + * Append window "wp" in the window list after window "after". + */ +void win_append(win_T *after, win_T *wp) +{ + win_T *before; + + if (after == NULL) /* after NULL is in front of the first */ + before = firstwin; + else + before = after->w_next; + + wp->w_next = before; + wp->w_prev = after; + if (after == NULL) + firstwin = wp; + else + after->w_next = wp; + if (before == NULL) + lastwin = wp; + else + before->w_prev = wp; +} + +/* + * Remove a window from the window list. + */ +void +win_remove ( + win_T *wp, + tabpage_T *tp /* tab page "win" is in, NULL for current */ +) +{ + if (wp->w_prev != NULL) + wp->w_prev->w_next = wp->w_next; + else if (tp == NULL) + firstwin = wp->w_next; + else + tp->tp_firstwin = wp->w_next; + if (wp->w_next != NULL) + wp->w_next->w_prev = wp->w_prev; + else if (tp == NULL) + lastwin = wp->w_prev; + else + tp->tp_lastwin = wp->w_prev; +} + +/* + * Append frame "frp" in a frame list after frame "after". + */ +static void frame_append(frame_T *after, frame_T *frp) +{ + frp->fr_next = after->fr_next; + after->fr_next = frp; + if (frp->fr_next != NULL) + frp->fr_next->fr_prev = frp; + frp->fr_prev = after; +} + +/* + * Insert frame "frp" in a frame list before frame "before". + */ +static void frame_insert(frame_T *before, frame_T *frp) +{ + frp->fr_next = before; + frp->fr_prev = before->fr_prev; + before->fr_prev = frp; + if (frp->fr_prev != NULL) + frp->fr_prev->fr_next = frp; + else + frp->fr_parent->fr_child = frp; +} + +/* + * Remove a frame from a frame list. + */ +static void frame_remove(frame_T *frp) +{ + if (frp->fr_prev != NULL) + frp->fr_prev->fr_next = frp->fr_next; + else + frp->fr_parent->fr_child = frp->fr_next; + if (frp->fr_next != NULL) + frp->fr_next->fr_prev = frp->fr_prev; +} + + +/* + * Allocate w_lines[] for window "wp". + */ +void win_alloc_lines(win_T *wp) +{ + wp->w_lines_valid = 0; + assert(Rows >= 0); + wp->w_lines = xcalloc(Rows, sizeof(wline_T)); +} + +/* + * free lsize arrays for a window + */ +void win_free_lsize(win_T *wp) +{ + free(wp->w_lines); + wp->w_lines = NULL; +} + +/* + * Called from win_new_shellsize() after Rows changed. + * This only does the current tab page, others must be done when made active. + */ +void shell_new_rows(void) +{ + int h = (int)ROWS_AVAIL; + + if (firstwin == NULL) /* not initialized yet */ + return; + if (h < frame_minheight(topframe, NULL)) + h = frame_minheight(topframe, NULL); + + /* First try setting the heights of windows with 'winfixheight'. If + * that doesn't result in the right height, forget about that option. */ + frame_new_height(topframe, h, FALSE, TRUE); + if (!frame_check_height(topframe, h)) + frame_new_height(topframe, h, FALSE, FALSE); + + (void)win_comp_pos(); /* recompute w_winrow and w_wincol */ + compute_cmdrow(); + curtab->tp_ch_used = p_ch; + +} + +/* + * Called from win_new_shellsize() after Columns changed. + */ +void shell_new_columns(void) +{ + if (firstwin == NULL) /* not initialized yet */ + return; + + /* First try setting the widths of windows with 'winfixwidth'. If that + * doesn't result in the right width, forget about that option. */ + frame_new_width(topframe, (int)Columns, FALSE, TRUE); + if (!frame_check_width(topframe, Columns)) + frame_new_width(topframe, (int)Columns, FALSE, FALSE); + + (void)win_comp_pos(); /* recompute w_winrow and w_wincol */ +} + +/* + * Save the size of all windows in "gap". + */ +void win_size_save(garray_T *gap) + +{ + win_T *wp; + + ga_init(gap, (int)sizeof(int), 1); + ga_grow(gap, win_count() * 2); + for (wp = firstwin; wp != NULL; wp = wp->w_next) { + ((int *)gap->ga_data)[gap->ga_len++] = + wp->w_width + wp->w_vsep_width; + ((int *)gap->ga_data)[gap->ga_len++] = wp->w_height; + } +} + +/* + * Restore window sizes, but only if the number of windows is still the same. + * Does not free the growarray. + */ +void win_size_restore(garray_T *gap) +{ + win_T *wp; + int i; + + if (win_count() * 2 == gap->ga_len) { + i = 0; + for (wp = firstwin; wp != NULL; wp = wp->w_next) { + frame_setwidth(wp->w_frame, ((int *)gap->ga_data)[i++]); + win_setheight_win(((int *)gap->ga_data)[i++], wp); + } + /* recompute the window positions */ + (void)win_comp_pos(); + } +} + +/* + * Update the position for all windows, using the width and height of the + * frames. + * Returns the row just after the last window. + */ +int win_comp_pos(void) +{ + int row = tabline_height(); + int col = 0; + + frame_comp_pos(topframe, &row, &col); + return row; +} + +/* + * Update the position of the windows in frame "topfrp", using the width and + * height of the frames. + * "*row" and "*col" are the top-left position of the frame. They are updated + * to the bottom-right position plus one. + */ +static void frame_comp_pos(frame_T *topfrp, int *row, int *col) +{ + win_T *wp; + frame_T *frp; + int startcol; + int startrow; + + wp = topfrp->fr_win; + if (wp != NULL) { + if (wp->w_winrow != *row + || wp->w_wincol != *col + ) { + /* position changed, redraw */ + wp->w_winrow = *row; + wp->w_wincol = *col; + redraw_win_later(wp, NOT_VALID); + wp->w_redr_status = TRUE; + } + *row += wp->w_height + wp->w_status_height; + *col += wp->w_width + wp->w_vsep_width; + } else { + startrow = *row; + startcol = *col; + for (frp = topfrp->fr_child; frp != NULL; frp = frp->fr_next) { + if (topfrp->fr_layout == FR_ROW) + *row = startrow; /* all frames are at the same row */ + else + *col = startcol; /* all frames are at the same col */ + frame_comp_pos(frp, row, col); + } + } +} + + +/* + * Set current window height and take care of repositioning other windows to + * fit around it. + */ +void win_setheight(int height) +{ + win_setheight_win(height, curwin); +} + +/* + * Set the window height of window "win" and take care of repositioning other + * windows to fit around it. + */ +void win_setheight_win(int height, win_T *win) +{ + int row; + + if (win == curwin) { + /* Always keep current window at least one line high, even when + * 'winminheight' is zero. */ + if (height < p_wmh) + height = p_wmh; + if (height == 0) + height = 1; + } + + frame_setheight(win->w_frame, height + win->w_status_height); + + /* recompute the window positions */ + row = win_comp_pos(); + + /* + * If there is extra space created between the last window and the command + * line, clear it. + */ + if (full_screen && msg_scrolled == 0 && row < cmdline_row) + screen_fill(row, cmdline_row, 0, (int)Columns, ' ', ' ', 0); + cmdline_row = row; + msg_row = row; + msg_col = 0; + + redraw_all_later(NOT_VALID); +} + + +/* + * Set the height of a frame to "height" and take care that all frames and + * windows inside it are resized. Also resize frames on the left and right if + * the are in the same FR_ROW frame. + * + * Strategy: + * If the frame is part of a FR_COL frame, try fitting the frame in that + * frame. If that doesn't work (the FR_COL frame is too small), recursively + * go to containing frames to resize them and make room. + * If the frame is part of a FR_ROW frame, all frames must be resized as well. + * Check for the minimal height of the FR_ROW frame. + * At the top level we can also use change the command line height. + */ +static void frame_setheight(frame_T *curfrp, int height) +{ + int room; /* total number of lines available */ + int take; /* number of lines taken from other windows */ + int room_cmdline; /* lines available from cmdline */ + int run; + frame_T *frp; + int h; + int room_reserved; + + /* If the height already is the desired value, nothing to do. */ + if (curfrp->fr_height == height) + return; + + if (curfrp->fr_parent == NULL) { + /* topframe: can only change the command line */ + if (height > ROWS_AVAIL) + height = ROWS_AVAIL; + if (height > 0) + frame_new_height(curfrp, height, FALSE, FALSE); + } else if (curfrp->fr_parent->fr_layout == FR_ROW) { + /* Row of frames: Also need to resize frames left and right of this + * one. First check for the minimal height of these. */ + h = frame_minheight(curfrp->fr_parent, NULL); + if (height < h) + height = h; + frame_setheight(curfrp->fr_parent, height); + } else { + /* + * Column of frames: try to change only frames in this column. + */ + /* + * Do this twice: + * 1: compute room available, if it's not enough try resizing the + * containing frame. + * 2: compute the room available and adjust the height to it. + * Try not to reduce the height of a window with 'winfixheight' set. + */ + for (run = 1; run <= 2; ++run) { + room = 0; + room_reserved = 0; + for (frp = curfrp->fr_parent->fr_child; frp != NULL; + frp = frp->fr_next) { + if (frp != curfrp + && frp->fr_win != NULL + && frp->fr_win->w_p_wfh) + room_reserved += frp->fr_height; + room += frp->fr_height; + if (frp != curfrp) + room -= frame_minheight(frp, NULL); + } + if (curfrp->fr_width != Columns) + room_cmdline = 0; + else { + room_cmdline = Rows - p_ch - (lastwin->w_winrow + + lastwin->w_height + + lastwin->w_status_height); + if (room_cmdline < 0) + room_cmdline = 0; + } + + if (height <= room + room_cmdline) + break; + if (run == 2 || curfrp->fr_width == Columns) { + if (height > room + room_cmdline) + height = room + room_cmdline; + break; + } + frame_setheight(curfrp->fr_parent, height + + frame_minheight(curfrp->fr_parent, NOWIN) - (int)p_wmh - 1); + /*NOTREACHED*/ + } + + /* + * Compute the number of lines we will take from others frames (can be + * negative!). + */ + take = height - curfrp->fr_height; + + /* If there is not enough room, also reduce the height of a window + * with 'winfixheight' set. */ + if (height > room + room_cmdline - room_reserved) + room_reserved = room + room_cmdline - height; + /* If there is only a 'winfixheight' window and making the + * window smaller, need to make the other window taller. */ + if (take < 0 && room - curfrp->fr_height < room_reserved) + room_reserved = 0; + + if (take > 0 && room_cmdline > 0) { + /* use lines from cmdline first */ + if (take < room_cmdline) + room_cmdline = take; + take -= room_cmdline; + topframe->fr_height += room_cmdline; + } + + /* + * set the current frame to the new height + */ + frame_new_height(curfrp, height, FALSE, FALSE); + + /* + * First take lines from the frames after the current frame. If + * that is not enough, takes lines from frames above the current + * frame. + */ + for (run = 0; run < 2; ++run) { + if (run == 0) + frp = curfrp->fr_next; /* 1st run: start with next window */ + else + frp = curfrp->fr_prev; /* 2nd run: start with prev window */ + while (frp != NULL && take != 0) { + h = frame_minheight(frp, NULL); + if (room_reserved > 0 + && frp->fr_win != NULL + && frp->fr_win->w_p_wfh) { + if (room_reserved >= frp->fr_height) + room_reserved -= frp->fr_height; + else { + if (frp->fr_height - room_reserved > take) + room_reserved = frp->fr_height - take; + take -= frp->fr_height - room_reserved; + frame_new_height(frp, room_reserved, FALSE, FALSE); + room_reserved = 0; + } + } else { + if (frp->fr_height - take < h) { + take -= frp->fr_height - h; + frame_new_height(frp, h, FALSE, FALSE); + } else { + frame_new_height(frp, frp->fr_height - take, + FALSE, FALSE); + take = 0; + } + } + if (run == 0) + frp = frp->fr_next; + else + frp = frp->fr_prev; + } + } + } +} + +/* + * Set current window width and take care of repositioning other windows to + * fit around it. + */ +void win_setwidth(int width) +{ + win_setwidth_win(width, curwin); +} + +void win_setwidth_win(int width, win_T *wp) +{ + /* Always keep current window at least one column wide, even when + * 'winminwidth' is zero. */ + if (wp == curwin) { + if (width < p_wmw) + width = p_wmw; + if (width == 0) + width = 1; + } + + frame_setwidth(wp->w_frame, width + wp->w_vsep_width); + + /* recompute the window positions */ + (void)win_comp_pos(); + + redraw_all_later(NOT_VALID); +} + +/* + * Set the width of a frame to "width" and take care that all frames and + * windows inside it are resized. Also resize frames above and below if the + * are in the same FR_ROW frame. + * + * Strategy is similar to frame_setheight(). + */ +static void frame_setwidth(frame_T *curfrp, int width) +{ + int room; /* total number of lines available */ + int take; /* number of lines taken from other windows */ + int run; + frame_T *frp; + int w; + int room_reserved; + + /* If the width already is the desired value, nothing to do. */ + if (curfrp->fr_width == width) + return; + + if (curfrp->fr_parent == NULL) + /* topframe: can't change width */ + return; + + if (curfrp->fr_parent->fr_layout == FR_COL) { + /* Column of frames: Also need to resize frames above and below of + * this one. First check for the minimal width of these. */ + w = frame_minwidth(curfrp->fr_parent, NULL); + if (width < w) + width = w; + frame_setwidth(curfrp->fr_parent, width); + } else { + /* + * Row of frames: try to change only frames in this row. + * + * Do this twice: + * 1: compute room available, if it's not enough try resizing the + * containing frame. + * 2: compute the room available and adjust the width to it. + */ + for (run = 1; run <= 2; ++run) { + room = 0; + room_reserved = 0; + for (frp = curfrp->fr_parent->fr_child; frp != NULL; + frp = frp->fr_next) { + if (frp != curfrp + && frp->fr_win != NULL + && frp->fr_win->w_p_wfw) + room_reserved += frp->fr_width; + room += frp->fr_width; + if (frp != curfrp) + room -= frame_minwidth(frp, NULL); + } + + if (width <= room) + break; + if (run == 2 || curfrp->fr_height >= ROWS_AVAIL) { + if (width > room) + width = room; + break; + } + frame_setwidth(curfrp->fr_parent, width + + frame_minwidth(curfrp->fr_parent, NOWIN) - (int)p_wmw - 1); + } + + /* + * Compute the number of lines we will take from others frames (can be + * negative!). + */ + take = width - curfrp->fr_width; + + /* If there is not enough room, also reduce the width of a window + * with 'winfixwidth' set. */ + if (width > room - room_reserved) + room_reserved = room - width; + /* If there is only a 'winfixwidth' window and making the + * window smaller, need to make the other window narrower. */ + if (take < 0 && room - curfrp->fr_width < room_reserved) + room_reserved = 0; + + /* + * set the current frame to the new width + */ + frame_new_width(curfrp, width, FALSE, FALSE); + + /* + * First take lines from the frames right of the current frame. If + * that is not enough, takes lines from frames left of the current + * frame. + */ + for (run = 0; run < 2; ++run) { + if (run == 0) + frp = curfrp->fr_next; /* 1st run: start with next window */ + else + frp = curfrp->fr_prev; /* 2nd run: start with prev window */ + while (frp != NULL && take != 0) { + w = frame_minwidth(frp, NULL); + if (room_reserved > 0 + && frp->fr_win != NULL + && frp->fr_win->w_p_wfw) { + if (room_reserved >= frp->fr_width) + room_reserved -= frp->fr_width; + else { + if (frp->fr_width - room_reserved > take) + room_reserved = frp->fr_width - take; + take -= frp->fr_width - room_reserved; + frame_new_width(frp, room_reserved, FALSE, FALSE); + room_reserved = 0; + } + } else { + if (frp->fr_width - take < w) { + take -= frp->fr_width - w; + frame_new_width(frp, w, FALSE, FALSE); + } else { + frame_new_width(frp, frp->fr_width - take, + FALSE, FALSE); + take = 0; + } + } + if (run == 0) + frp = frp->fr_next; + else + frp = frp->fr_prev; + } + } + } +} + +/* + * Check 'winminheight' for a valid value. + */ +void win_setminheight(void) +{ + int room; + int first = TRUE; + win_T *wp; + + /* loop until there is a 'winminheight' that is possible */ + while (p_wmh > 0) { + /* TODO: handle vertical splits */ + room = -p_wh; + for (wp = firstwin; wp != NULL; wp = wp->w_next) + room += wp->w_height - p_wmh; + if (room >= 0) + break; + --p_wmh; + if (first) { + EMSG(_(e_noroom)); + first = FALSE; + } + } +} + +/* + * Status line of dragwin is dragged "offset" lines down (negative is up). + */ +void win_drag_status_line(win_T *dragwin, int offset) +{ + frame_T *curfr; + frame_T *fr; + int room; + int row; + int up; /* if TRUE, drag status line up, otherwise down */ + int n; + + fr = dragwin->w_frame; + curfr = fr; + if (fr != topframe) { /* more than one window */ + fr = fr->fr_parent; + /* When the parent frame is not a column of frames, its parent should + * be. */ + if (fr->fr_layout != FR_COL) { + curfr = fr; + if (fr != topframe) /* only a row of windows, may drag statusline */ + fr = fr->fr_parent; + } + } + + /* If this is the last frame in a column, may want to resize the parent + * frame instead (go two up to skip a row of frames). */ + while (curfr != topframe && curfr->fr_next == NULL) { + if (fr != topframe) + fr = fr->fr_parent; + curfr = fr; + if (fr != topframe) + fr = fr->fr_parent; + } + + if (offset < 0) { /* drag up */ + up = TRUE; + offset = -offset; + /* sum up the room of the current frame and above it */ + if (fr == curfr) { + /* only one window */ + room = fr->fr_height - frame_minheight(fr, NULL); + } else { + room = 0; + for (fr = fr->fr_child;; fr = fr->fr_next) { + room += fr->fr_height - frame_minheight(fr, NULL); + if (fr == curfr) + break; + } + } + fr = curfr->fr_next; /* put fr at frame that grows */ + } else { /* drag down */ + up = FALSE; + /* + * Only dragging the last status line can reduce p_ch. + */ + room = Rows - cmdline_row; + if (curfr->fr_next == NULL) + room -= 1; + else + room -= p_ch; + if (room < 0) + room = 0; + /* sum up the room of frames below of the current one */ + for (fr = curfr->fr_next; fr != NULL; fr = fr->fr_next) + room += fr->fr_height - frame_minheight(fr, NULL); + fr = curfr; /* put fr at window that grows */ + } + + if (room < offset) /* Not enough room */ + offset = room; /* Move as far as we can */ + if (offset <= 0) + return; + + /* + * Grow frame fr by "offset" lines. + * Doesn't happen when dragging the last status line up. + */ + if (fr != NULL) + frame_new_height(fr, fr->fr_height + offset, up, FALSE); + + if (up) + fr = curfr; /* current frame gets smaller */ + else + fr = curfr->fr_next; /* next frame gets smaller */ + + /* + * Now make the other frames smaller. + */ + while (fr != NULL && offset > 0) { + n = frame_minheight(fr, NULL); + if (fr->fr_height - offset <= n) { + offset -= fr->fr_height - n; + frame_new_height(fr, n, !up, FALSE); + } else { + frame_new_height(fr, fr->fr_height - offset, !up, FALSE); + break; + } + if (up) + fr = fr->fr_prev; + else + fr = fr->fr_next; + } + row = win_comp_pos(); + screen_fill(row, cmdline_row, 0, (int)Columns, ' ', ' ', 0); + cmdline_row = row; + p_ch = Rows - cmdline_row; + if (p_ch < 1) + p_ch = 1; + curtab->tp_ch_used = p_ch; + redraw_all_later(SOME_VALID); + showmode(); +} + +/* + * Separator line of dragwin is dragged "offset" lines right (negative is left). + */ +void win_drag_vsep_line(win_T *dragwin, int offset) +{ + frame_T *curfr; + frame_T *fr; + int room; + int left; /* if TRUE, drag separator line left, otherwise right */ + int n; + + fr = dragwin->w_frame; + if (fr == topframe) /* only one window (cannot happen?) */ + return; + curfr = fr; + fr = fr->fr_parent; + /* When the parent frame is not a row of frames, its parent should be. */ + if (fr->fr_layout != FR_ROW) { + if (fr == topframe) /* only a column of windows (cannot happen?) */ + return; + curfr = fr; + fr = fr->fr_parent; + } + + /* If this is the last frame in a row, may want to resize a parent + * frame instead. */ + while (curfr->fr_next == NULL) { + if (fr == topframe) + break; + curfr = fr; + fr = fr->fr_parent; + if (fr != topframe) { + curfr = fr; + fr = fr->fr_parent; + } + } + + if (offset < 0) { /* drag left */ + left = TRUE; + offset = -offset; + /* sum up the room of the current frame and left of it */ + room = 0; + for (fr = fr->fr_child;; fr = fr->fr_next) { + room += fr->fr_width - frame_minwidth(fr, NULL); + if (fr == curfr) + break; + } + fr = curfr->fr_next; /* put fr at frame that grows */ + } else { /* drag right */ + left = FALSE; + /* sum up the room of frames right of the current one */ + room = 0; + for (fr = curfr->fr_next; fr != NULL; fr = fr->fr_next) + room += fr->fr_width - frame_minwidth(fr, NULL); + fr = curfr; /* put fr at window that grows */ + } + + if (room < offset) /* Not enough room */ + offset = room; /* Move as far as we can */ + if (offset <= 0) /* No room at all, quit. */ + return; + + /* grow frame fr by offset lines */ + frame_new_width(fr, fr->fr_width + offset, left, FALSE); + + /* shrink other frames: current and at the left or at the right */ + if (left) + fr = curfr; /* current frame gets smaller */ + else + fr = curfr->fr_next; /* next frame gets smaller */ + + while (fr != NULL && offset > 0) { + n = frame_minwidth(fr, NULL); + if (fr->fr_width - offset <= n) { + offset -= fr->fr_width - n; + frame_new_width(fr, n, !left, FALSE); + } else { + frame_new_width(fr, fr->fr_width - offset, !left, FALSE); + break; + } + if (left) + fr = fr->fr_prev; + else + fr = fr->fr_next; + } + (void)win_comp_pos(); + redraw_all_later(NOT_VALID); +} + + +#define FRACTION_MULT 16384L + +/* + * Set wp->w_fraction for the current w_wrow and w_height. + */ +static void set_fraction(win_T *wp) +{ + wp->w_fraction = ((long)wp->w_wrow * FRACTION_MULT + + FRACTION_MULT / 2) / (long)wp->w_height; +} + +/* + * Set the height of a window. + * This takes care of the things inside the window, not what happens to the + * window position, the frame or to other windows. + */ +void win_new_height(win_T *wp, int height) +{ + linenr_T lnum; + int sline, line_size; + + /* Don't want a negative height. Happens when splitting a tiny window. + * Will equalize heights soon to fix it. */ + if (height < 0) + height = 0; + if (wp->w_height == height) + return; /* nothing to do */ + + if (wp->w_wrow != wp->w_prev_fraction_row && wp->w_height > 0) + set_fraction(wp); + + wp->w_height = height; + wp->w_skipcol = 0; + + /* Don't change w_topline when height is zero. Don't set w_topline when + * 'scrollbind' is set and this isn't the current window. */ + if (height > 0 + && (!wp->w_p_scb || wp == curwin) + ) { + /* + * Find a value for w_topline that shows the cursor at the same + * relative position in the window as before (more or less). + */ + lnum = wp->w_cursor.lnum; + if (lnum < 1) /* can happen when starting up */ + lnum = 1; + wp->w_wrow = ((long)wp->w_fraction * (long)height - 1L) / FRACTION_MULT; + line_size = plines_win_col(wp, lnum, (long)(wp->w_cursor.col)) - 1; + sline = wp->w_wrow - line_size; + + if (sline >= 0) { + /* Make sure the whole cursor line is visible, if possible. */ + int rows = plines_win(wp, lnum, FALSE); + + if (sline > wp->w_height - rows) { + sline = wp->w_height - rows; + wp->w_wrow -= rows - line_size; + } + } + + if (sline < 0) { + /* + * Cursor line would go off top of screen if w_wrow was this high. + * Make cursor line the first line in the window. If not enough + * room use w_skipcol; + */ + wp->w_wrow = line_size; + if (wp->w_wrow >= wp->w_height + && (W_WIDTH(wp) - win_col_off(wp)) > 0) { + wp->w_skipcol += W_WIDTH(wp) - win_col_off(wp); + --wp->w_wrow; + while (wp->w_wrow >= wp->w_height) { + wp->w_skipcol += W_WIDTH(wp) - win_col_off(wp) + + win_col_off2(wp); + --wp->w_wrow; + } + } + } else { + while (sline > 0 && lnum > 1) { + hasFoldingWin(wp, lnum, &lnum, NULL, TRUE, NULL); + if (lnum == 1) { + /* first line in buffer is folded */ + line_size = 1; + --sline; + break; + } + --lnum; + if (lnum == wp->w_topline) + line_size = plines_win_nofill(wp, lnum, TRUE) + + wp->w_topfill; + else + line_size = plines_win(wp, lnum, TRUE); + sline -= line_size; + } + + if (sline < 0) { + /* + * Line we want at top would go off top of screen. Use next + * line instead. + */ + hasFoldingWin(wp, lnum, NULL, &lnum, TRUE, NULL); + lnum++; + wp->w_wrow -= line_size + sline; + } else if (sline > 0) { + /* First line of file reached, use that as topline. */ + lnum = 1; + wp->w_wrow -= sline; + } + } + set_topline(wp, lnum); + } + + if (wp == curwin) { + if (p_so) + update_topline(); + curs_columns(FALSE); /* validate w_wrow */ + } + wp->w_prev_fraction_row = wp->w_wrow; + + win_comp_scroll(wp); + redraw_win_later(wp, SOME_VALID); + wp->w_redr_status = TRUE; + invalidate_botline_win(wp); +} + +/* + * Set the width of a window. + */ +void win_new_width(win_T *wp, int width) +{ + wp->w_width = width; + wp->w_lines_valid = 0; + changed_line_abv_curs_win(wp); + invalidate_botline_win(wp); + if (wp == curwin) { + update_topline(); + curs_columns(TRUE); /* validate w_wrow */ + } + redraw_win_later(wp, NOT_VALID); + wp->w_redr_status = TRUE; +} + +void win_comp_scroll(win_T *wp) +{ + wp->w_p_scr = wp->w_height / 2; + if (wp->w_p_scr == 0) + wp->w_p_scr = 1; +} + +/* + * command_height: called whenever p_ch has been changed + */ +void command_height(void) +{ + int h; + frame_T *frp; + int old_p_ch = curtab->tp_ch_used; + + /* Use the value of p_ch that we remembered. This is needed for when the + * GUI starts up, we can't be sure in what order things happen. And when + * p_ch was changed in another tab page. */ + curtab->tp_ch_used = p_ch; + + /* Find bottom frame with width of screen. */ + frp = lastwin->w_frame; + while (frp->fr_width != Columns && frp->fr_parent != NULL) + frp = frp->fr_parent; + + /* Avoid changing the height of a window with 'winfixheight' set. */ + while (frp->fr_prev != NULL && frp->fr_layout == FR_LEAF + && frp->fr_win->w_p_wfh) + frp = frp->fr_prev; + + if (starting != NO_SCREEN) { + cmdline_row = Rows - p_ch; + + if (p_ch > old_p_ch) { /* p_ch got bigger */ + while (p_ch > old_p_ch) { + if (frp == NULL) { + EMSG(_(e_noroom)); + p_ch = old_p_ch; + curtab->tp_ch_used = p_ch; + cmdline_row = Rows - p_ch; + break; + } + h = frp->fr_height - frame_minheight(frp, NULL); + if (h > p_ch - old_p_ch) + h = p_ch - old_p_ch; + old_p_ch += h; + frame_add_height(frp, -h); + frp = frp->fr_prev; + } + + /* Recompute window positions. */ + (void)win_comp_pos(); + + /* clear the lines added to cmdline */ + if (full_screen) + screen_fill((int)(cmdline_row), (int)Rows, 0, + (int)Columns, ' ', ' ', 0); + msg_row = cmdline_row; + redraw_cmdline = TRUE; + return; + } + + if (msg_row < cmdline_row) + msg_row = cmdline_row; + redraw_cmdline = TRUE; + } + frame_add_height(frp, (int)(old_p_ch - p_ch)); + + /* Recompute window positions. */ + if (frp != lastwin->w_frame) + (void)win_comp_pos(); +} + +/* + * Resize frame "frp" to be "n" lines higher (negative for less high). + * Also resize the frames it is contained in. + */ +static void frame_add_height(frame_T *frp, int n) +{ + frame_new_height(frp, frp->fr_height + n, FALSE, FALSE); + for (;; ) { + frp = frp->fr_parent; + if (frp == NULL) + break; + frp->fr_height += n; + } +} + +/* + * Get the file name at the cursor. + * If Visual mode is active, use the selected text if it's in one line. + * Returns the name in allocated memory, NULL for failure. + */ +char_u *grab_file_name(long count, linenr_T *file_lnum) +{ + if (VIsual_active) { + int len; + char_u *ptr; + + if (get_visual_text(NULL, &ptr, &len) == FAIL) + return NULL; + return find_file_name_in_path(ptr, len, + FNAME_MESS|FNAME_EXP|FNAME_REL, count, curbuf->b_ffname); + } + return file_name_at_cursor(FNAME_MESS|FNAME_HYP|FNAME_EXP|FNAME_REL, count, + file_lnum); + +} + +/* + * Return the file name under or after the cursor. + * + * The 'path' option is searched if the file name is not absolute. + * The string returned has been alloc'ed and should be freed by the caller. + * NULL is returned if the file name or file is not found. + * + * options: + * FNAME_MESS give error messages + * FNAME_EXP expand to path + * FNAME_HYP check for hypertext link + * FNAME_INCL apply "includeexpr" + */ +char_u *file_name_at_cursor(int options, long count, linenr_T *file_lnum) +{ + return file_name_in_line(ml_get_curline(), + curwin->w_cursor.col, options, count, curbuf->b_ffname, + file_lnum); +} + +/* + * Return the name of the file under or after ptr[col]. + * Otherwise like file_name_at_cursor(). + */ +char_u * +file_name_in_line ( + char_u *line, + int col, + int options, + long count, + char_u *rel_fname, /* file we are searching relative to */ + linenr_T *file_lnum /* line number after the file name */ +) +{ + char_u *ptr; + int len; + + /* + * search forward for what could be the start of a file name + */ + ptr = line + col; + while (*ptr != NUL && !vim_isfilec(*ptr)) + mb_ptr_adv(ptr); + if (*ptr == NUL) { /* nothing found */ + if (options & FNAME_MESS) + EMSG(_("E446: No file name under cursor")); + return NULL; + } + + /* + * Search backward for first char of the file name. + * Go one char back to ":" before "//" even when ':' is not in 'isfname'. + */ + while (ptr > line) { + if (has_mbyte && (len = (*mb_head_off)(line, ptr - 1)) > 0) + ptr -= len + 1; + else if (vim_isfilec(ptr[-1]) + || ((options & FNAME_HYP) && path_is_url(ptr - 1))) + --ptr; + else + break; + } + + /* + * Search forward for the last char of the file name. + * Also allow "://" when ':' is not in 'isfname'. + */ + len = 0; + while (vim_isfilec(ptr[len]) + || ((options & FNAME_HYP) && path_is_url(ptr + len))) + if (has_mbyte) + len += (*mb_ptr2len)(ptr + len); + else + ++len; + + /* + * If there is trailing punctuation, remove it. + * But don't remove "..", could be a directory name. + */ + if (len > 2 && vim_strchr((char_u *)".,:;!", ptr[len - 1]) != NULL + && ptr[len - 2] != '.') + --len; + + if (file_lnum != NULL) { + char_u *p; + + /* Get the number after the file name and a separator character */ + p = ptr + len; + p = skipwhite(p); + if (*p != NUL) { + if (!isdigit(*p)) + ++p; /* skip the separator */ + p = skipwhite(p); + if (isdigit(*p)) + *file_lnum = (int)getdigits(&p); + } + } + + return find_file_name_in_path(ptr, len, options, count, rel_fname); +} + +/* + * Add or remove a status line for the bottom window(s), according to the + * value of 'laststatus'. + */ +void +last_status ( + int morewin /* pretend there are two or more windows */ +) +{ + /* Don't make a difference between horizontal or vertical split. */ + last_status_rec(topframe, (p_ls == 2 + || (p_ls == 1 && (morewin || lastwin != firstwin)))); +} + +static void last_status_rec(frame_T *fr, int statusline) +{ + frame_T *fp; + win_T *wp; + + if (fr->fr_layout == FR_LEAF) { + wp = fr->fr_win; + if (wp->w_status_height != 0 && !statusline) { + /* remove status line */ + win_new_height(wp, wp->w_height + 1); + wp->w_status_height = 0; + comp_col(); + } else if (wp->w_status_height == 0 && statusline) { + /* Find a frame to take a line from. */ + fp = fr; + while (fp->fr_height <= frame_minheight(fp, NULL)) { + if (fp == topframe) { + EMSG(_(e_noroom)); + return; + } + /* In a column of frames: go to frame above. If already at + * the top or in a row of frames: go to parent. */ + if (fp->fr_parent->fr_layout == FR_COL && fp->fr_prev != NULL) + fp = fp->fr_prev; + else + fp = fp->fr_parent; + } + wp->w_status_height = 1; + if (fp != fr) { + frame_new_height(fp, fp->fr_height - 1, FALSE, FALSE); + frame_fix_height(wp); + (void)win_comp_pos(); + } else + win_new_height(wp, wp->w_height - 1); + comp_col(); + redraw_all_later(SOME_VALID); + } + } else if (fr->fr_layout == FR_ROW) { + /* vertically split windows, set status line for each one */ + for (fp = fr->fr_child; fp != NULL; fp = fp->fr_next) + last_status_rec(fp, statusline); + } else { + /* horizontally split window, set status line for last one */ + for (fp = fr->fr_child; fp->fr_next != NULL; fp = fp->fr_next) + ; + last_status_rec(fp, statusline); + } +} + +/* + * Return the number of lines used by the tab page line. + */ +int tabline_height(void) +{ + switch (p_stal) { + case 0: return 0; + case 1: return (first_tabpage->tp_next == NULL) ? 0 : 1; + } + return 1; +} + +/* + * Return the minimal number of rows that is needed on the screen to display + * the current number of windows. + */ +int min_rows(void) +{ + int total; + tabpage_T *tp; + int n; + + if (firstwin == NULL) /* not initialized yet */ + return MIN_LINES; + + total = 0; + for (tp = first_tabpage; tp != NULL; tp = tp->tp_next) { + n = frame_minheight(tp->tp_topframe, NULL); + if (total < n) + total = n; + } + total += tabline_height(); + total += 1; /* count the room for the command line */ + return total; +} + +/* + * Return TRUE if there is only one window (in the current tab page), not + * counting a help or preview window, unless it is the current window. + * Does not count "aucmd_win". + */ +int only_one_window(void) +{ + int count = 0; + win_T *wp; + + /* If there is another tab page there always is another window. */ + if (first_tabpage->tp_next != NULL) + return FALSE; + + for (wp = firstwin; wp != NULL; wp = wp->w_next) + if (wp->w_buffer != NULL + && (!((wp->w_buffer->b_help && !curbuf->b_help) + || wp->w_p_pvw + ) || wp == curwin) + && wp != aucmd_win + ) + ++count; + return count <= 1; +} + +/* + * Correct the cursor line number in other windows. Used after changing the + * current buffer, and before applying autocommands. + * When "do_curwin" is TRUE, also check current window. + */ +void check_lnums(int do_curwin) +{ + win_T *wp; + + tabpage_T *tp; + + FOR_ALL_TAB_WINDOWS(tp, wp) + if ((do_curwin || wp != curwin) && wp->w_buffer == curbuf) { + if (wp->w_cursor.lnum > curbuf->b_ml.ml_line_count) + wp->w_cursor.lnum = curbuf->b_ml.ml_line_count; + if (wp->w_topline > curbuf->b_ml.ml_line_count) + wp->w_topline = curbuf->b_ml.ml_line_count; + } +} + + +/* + * A snapshot of the window sizes, to restore them after closing the help + * window. + * Only these fields are used: + * fr_layout + * fr_width + * fr_height + * fr_next + * fr_child + * fr_win (only valid for the old curwin, NULL otherwise) + */ + +/* + * Create a snapshot of the current frame sizes. + */ +void make_snapshot(int idx) +{ + clear_snapshot(curtab, idx); + make_snapshot_rec(topframe, &curtab->tp_snapshot[idx]); +} + +static void make_snapshot_rec(frame_T *fr, frame_T **frp) +{ + *frp = xcalloc(1, sizeof(frame_T)); + (*frp)->fr_layout = fr->fr_layout; + (*frp)->fr_width = fr->fr_width; + (*frp)->fr_height = fr->fr_height; + if (fr->fr_next != NULL) + make_snapshot_rec(fr->fr_next, &((*frp)->fr_next)); + if (fr->fr_child != NULL) + make_snapshot_rec(fr->fr_child, &((*frp)->fr_child)); + if (fr->fr_layout == FR_LEAF && fr->fr_win == curwin) + (*frp)->fr_win = curwin; +} + +/* + * Remove any existing snapshot. + */ +static void clear_snapshot(tabpage_T *tp, int idx) +{ + clear_snapshot_rec(tp->tp_snapshot[idx]); + tp->tp_snapshot[idx] = NULL; +} + +static void clear_snapshot_rec(frame_T *fr) +{ + if (fr != NULL) { + clear_snapshot_rec(fr->fr_next); + clear_snapshot_rec(fr->fr_child); + free(fr); + } +} + +/* + * Restore a previously created snapshot, if there is any. + * This is only done if the screen size didn't change and the window layout is + * still the same. + */ +void +restore_snapshot ( + int idx, + int close_curwin /* closing current window */ +) +{ + win_T *wp; + + if (curtab->tp_snapshot[idx] != NULL + && curtab->tp_snapshot[idx]->fr_width == topframe->fr_width + && curtab->tp_snapshot[idx]->fr_height == topframe->fr_height + && check_snapshot_rec(curtab->tp_snapshot[idx], topframe) == OK) { + wp = restore_snapshot_rec(curtab->tp_snapshot[idx], topframe); + win_comp_pos(); + if (wp != NULL && close_curwin) + win_goto(wp); + redraw_all_later(CLEAR); + } + clear_snapshot(curtab, idx); +} + +/* + * Check if frames "sn" and "fr" have the same layout, same following frames + * and same children. + */ +static int check_snapshot_rec(frame_T *sn, frame_T *fr) +{ + if (sn->fr_layout != fr->fr_layout + || (sn->fr_next == NULL) != (fr->fr_next == NULL) + || (sn->fr_child == NULL) != (fr->fr_child == NULL) + || (sn->fr_next != NULL + && check_snapshot_rec(sn->fr_next, fr->fr_next) == FAIL) + || (sn->fr_child != NULL + && check_snapshot_rec(sn->fr_child, fr->fr_child) == FAIL)) + return FAIL; + return OK; +} + +/* + * Copy the size of snapshot frame "sn" to frame "fr". Do the same for all + * following frames and children. + * Returns a pointer to the old current window, or NULL. + */ +static win_T *restore_snapshot_rec(frame_T *sn, frame_T *fr) +{ + win_T *wp = NULL; + win_T *wp2; + + fr->fr_height = sn->fr_height; + fr->fr_width = sn->fr_width; + if (fr->fr_layout == FR_LEAF) { + frame_new_height(fr, fr->fr_height, FALSE, FALSE); + frame_new_width(fr, fr->fr_width, FALSE, FALSE); + wp = sn->fr_win; + } + if (sn->fr_next != NULL) { + wp2 = restore_snapshot_rec(sn->fr_next, fr->fr_next); + if (wp2 != NULL) + wp = wp2; + } + if (sn->fr_child != NULL) { + wp2 = restore_snapshot_rec(sn->fr_child, fr->fr_child); + if (wp2 != NULL) + wp = wp2; + } + return wp; +} + + +/* + * Set "win" to be the curwin and "tp" to be the current tab page. + * restore_win() MUST be called to undo. + * No autocommands will be executed. + * When "no_display" is TRUE the display won't be affected, no redraw is + * triggered, another tabpage access is limited. + * Returns FAIL if switching to "win" failed. + */ +int switch_win(win_T **save_curwin, tabpage_T **save_curtab, win_T *win, tabpage_T *tp, int no_display) +{ + block_autocmds(); + *save_curwin = curwin; + if (tp != NULL) { + *save_curtab = curtab; + if (no_display) { + curtab->tp_firstwin = firstwin; + curtab->tp_lastwin = lastwin; + curtab = tp; + firstwin = curtab->tp_firstwin; + lastwin = curtab->tp_lastwin; + } else + goto_tabpage_tp(tp, FALSE, FALSE); + } + if (!win_valid(win)) { + unblock_autocmds(); + return FAIL; + } + curwin = win; + curbuf = curwin->w_buffer; + return OK; +} + +/* + * Restore current tabpage and window saved by switch_win(), if still valid. + * When "no_display" is TRUE the display won't be affected, no redraw is + * triggered. + */ +void restore_win(win_T *save_curwin, tabpage_T *save_curtab, int no_display) +{ + if (save_curtab != NULL && valid_tabpage(save_curtab)) { + if (no_display) { + curtab->tp_firstwin = firstwin; + curtab->tp_lastwin = lastwin; + curtab = save_curtab; + firstwin = curtab->tp_firstwin; + lastwin = curtab->tp_lastwin; + } else + goto_tabpage_tp(save_curtab, FALSE, FALSE); + } + if (win_valid(save_curwin)) { + curwin = save_curwin; + curbuf = curwin->w_buffer; + } + unblock_autocmds(); +} + +/* + * Make "buf" the current buffer. restore_buffer() MUST be called to undo. + * No autocommands will be executed. Use aucmd_prepbuf() if there are any. + */ +void switch_buffer(buf_T **save_curbuf, buf_T *buf) +{ + block_autocmds(); + *save_curbuf = curbuf; + --curbuf->b_nwindows; + curbuf = buf; + curwin->w_buffer = buf; + ++curbuf->b_nwindows; +} + +/* + * Restore the current buffer after using switch_buffer(). + */ +void restore_buffer(buf_T *save_curbuf) +{ + unblock_autocmds(); + /* Check for valid buffer, just in case. */ + if (buf_valid(save_curbuf)) { + --curbuf->b_nwindows; + curwin->w_buffer = save_curbuf; + curbuf = save_curbuf; + ++curbuf->b_nwindows; + } +} + + +/* + * Add match to the match list of window 'wp'. The pattern 'pat' will be + * highlighted with the group 'grp' with priority 'prio'. + * Optionally, a desired ID 'id' can be specified (greater than or equal to 1). + * If no particular ID is desired, -1 must be specified for 'id'. + * Return ID of added match, -1 on failure. + */ +int match_add(win_T *wp, char_u *grp, char_u *pat, int prio, int id) +{ + matchitem_T *cur; + matchitem_T *prev; + matchitem_T *m; + int hlg_id; + regprog_T *regprog; + + if (*grp == NUL || *pat == NUL) + return -1; + if (id < -1 || id == 0) { + EMSGN("E799: Invalid ID: %" PRId64 + " (must be greater than or equal to 1)", + id); + return -1; + } + if (id != -1) { + cur = wp->w_match_head; + while (cur != NULL) { + if (cur->id == id) { + EMSGN("E801: ID already taken: %" PRId64, id); + return -1; + } + cur = cur->next; + } + } + if ((hlg_id = syn_namen2id(grp, (int)STRLEN(grp))) == 0) { + EMSG2(_(e_nogroup), grp); + return -1; + } + if ((regprog = vim_regcomp(pat, RE_MAGIC)) == NULL) { + EMSG2(_(e_invarg2), pat); + return -1; + } + + /* Find available match ID. */ + while (id == -1) { + cur = wp->w_match_head; + while (cur != NULL && cur->id != wp->w_next_match_id) + cur = cur->next; + if (cur == NULL) + id = wp->w_next_match_id; + wp->w_next_match_id++; + } + + /* Build new match. */ + m = (matchitem_T *)alloc(sizeof(matchitem_T)); + m->id = id; + m->priority = prio; + m->pattern = vim_strsave(pat); + m->hlg_id = hlg_id; + m->match.regprog = regprog; + m->match.rmm_ic = FALSE; + m->match.rmm_maxcol = 0; + + /* Insert new match. The match list is in ascending order with regard to + * the match priorities. */ + cur = wp->w_match_head; + prev = cur; + while (cur != NULL && prio >= cur->priority) { + prev = cur; + cur = cur->next; + } + if (cur == prev) + wp->w_match_head = m; + else + prev->next = m; + m->next = cur; + + redraw_later(SOME_VALID); + return id; +} + +/* + * Delete match with ID 'id' in the match list of window 'wp'. + * Print error messages if 'perr' is TRUE. + */ +int match_delete(win_T *wp, int id, int perr) +{ + matchitem_T *cur = wp->w_match_head; + matchitem_T *prev = cur; + + if (id < 1) { + if (perr == TRUE) + EMSGN("E802: Invalid ID: %" PRId64 + " (must be greater than or equal to 1)", + id); + return -1; + } + while (cur != NULL && cur->id != id) { + prev = cur; + cur = cur->next; + } + if (cur == NULL) { + if (perr == TRUE) + EMSGN("E803: ID not found: %" PRId64, id); + return -1; + } + if (cur == prev) + wp->w_match_head = cur->next; + else + prev->next = cur->next; + vim_regfree(cur->match.regprog); + free(cur->pattern); + free(cur); + redraw_later(SOME_VALID); + return 0; +} + +/* + * Delete all matches in the match list of window 'wp'. + */ +void clear_matches(win_T *wp) +{ + matchitem_T *m; + + while (wp->w_match_head != NULL) { + m = wp->w_match_head->next; + vim_regfree(wp->w_match_head->match.regprog); + free(wp->w_match_head->pattern); + free(wp->w_match_head); + wp->w_match_head = m; + } + redraw_later(SOME_VALID); +} + +/* + * Get match from ID 'id' in window 'wp'. + * Return NULL if match not found. + */ +matchitem_T *get_match(win_T *wp, int id) +{ + matchitem_T *cur = wp->w_match_head; + + while (cur != NULL && cur->id != id) + cur = cur->next; + return cur; +} + + +/* + * Return TRUE if "topfrp" and its children are at the right height. + */ +static int frame_check_height(frame_T *topfrp, int height) +{ + frame_T *frp; + + if (topfrp->fr_height != height) + return FALSE; + + if (topfrp->fr_layout == FR_ROW) + for (frp = topfrp->fr_child; frp != NULL; frp = frp->fr_next) + if (frp->fr_height != height) + return FALSE; + + return TRUE; +} + +/* + * Return TRUE if "topfrp" and its children are at the right width. + */ +static int frame_check_width(frame_T *topfrp, int width) +{ + frame_T *frp; + + if (topfrp->fr_width != width) + return FALSE; + + if (topfrp->fr_layout == FR_COL) + for (frp = topfrp->fr_child; frp != NULL; frp = frp->fr_next) + if (frp->fr_width != width) + return FALSE; + + return TRUE; +} + |