diff options
Diffstat (limited to 'src/window.c')
| -rw-r--r-- | src/window.c | 4946 |
1 files changed, 4946 insertions, 0 deletions
diff --git a/src/window.c b/src/window.c new file mode 100644 index 000000000..dc63e09d4 --- /dev/null +++ b/src/window.c @@ -0,0 +1,4946 @@ +/* vi:set ts=8 sts=4 sw=4: + * + * 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" + +#ifdef HAVE_FCNTL_H +# include <fcntl.h> /* for chdir() */ +#endif + +static int path_is_url __ARGS((char_u *p)); +#if defined(FEAT_WINDOWS) || defined(PROTO) +static int win_split_ins __ARGS((int size, int flags, win_T *newwin, int dir)); +static int win_comp_pos __ARGS((void)); +static void frame_comp_pos __ARGS((frame_T *topfrp, int *row, int *col)); +static void frame_setheight __ARGS((frame_T *curfrp, int height)); +#ifdef FEAT_VERTSPLIT +static void frame_setwidth __ARGS((frame_T *curfrp, int width)); +#endif +static void win_exchange __ARGS((long)); +static void win_rotate __ARGS((int, int)); +static void win_totop __ARGS((int size, int flags)); +static void win_equal_rec __ARGS((win_T *next_curwin, int current, frame_T *topfr, int dir, int col, int row, int width, int height)); +static win_T *winframe_remove __ARGS((win_T *win, int *dirp)); +static frame_T *win_altframe __ARGS((win_T *win)); +static win_T *frame2win __ARGS((frame_T *frp)); +static int frame_has_win __ARGS((frame_T *frp, win_T *wp)); +static void frame_new_height __ARGS((frame_T *topfrp, int height, int topfirst, int wfh)); +static int frame_fixed_height __ARGS((frame_T *frp)); +#ifdef FEAT_VERTSPLIT +static void frame_add_statusline __ARGS((frame_T *frp)); +static void frame_new_width __ARGS((frame_T *topfrp, int width, int leftfirst)); +static void frame_add_vsep __ARGS((frame_T *frp)); +static int frame_minwidth __ARGS((frame_T *topfrp, win_T *next_curwin)); +static void frame_fix_width __ARGS((win_T *wp)); +#endif +static void frame_fix_height __ARGS((win_T *wp)); +static int frame_minheight __ARGS((frame_T *topfrp, win_T *next_curwin)); +static void win_enter_ext __ARGS((win_T *wp, int undo_sync, int no_curwin)); +static void win_free __ARGS((win_T *wp)); +static void win_append __ARGS((win_T *, win_T *)); +static void win_remove __ARGS((win_T *)); +static void frame_append __ARGS((frame_T *after, frame_T *frp)); +static void frame_insert __ARGS((frame_T *before, frame_T *frp)); +static void frame_remove __ARGS((frame_T *frp)); +#ifdef FEAT_VERTSPLIT +static void win_new_width __ARGS((win_T *wp, int width)); +static int win_minheight __ARGS((win_T *wp)); +static void win_goto_ver __ARGS((int up, long count)); +static void win_goto_hor __ARGS((int left, long count)); +#endif +static void frame_add_height __ARGS((frame_T *frp, int n)); +static void last_status_rec __ARGS((frame_T *fr, int statusline)); + +static void make_snapshot __ARGS((void)); +static void make_snapshot_rec __ARGS((frame_T *fr, frame_T **frp)); +static void clear_snapshot __ARGS((void)); +static void clear_snapshot_rec __ARGS((frame_T *fr)); +static void restore_snapshot __ARGS((int close_curwin)); +static int check_snapshot_rec __ARGS((frame_T *sn, frame_T *fr)); +static win_T *restore_snapshot_rec __ARGS((frame_T *sn, frame_T *fr)); + +#endif /* FEAT_WINDOWS */ +static win_T *win_alloc __ARGS((win_T *after)); +static void win_new_height __ARGS((win_T *, int)); + +#define URL_SLASH 1 /* path_is_url() has found "://" */ +#define URL_BACKSLASH 2 /* path_is_url() has found ":\\" */ + +#define NOWIN (win_T *)-1 /* non-exisiting window */ + +#if defined(FEAT_WINDOWS) || defined(PROTO) +/* + * all CTRL-W window commands are handled here, called from normal_cmd(). + */ + void +do_window(nchar, Prenum, xchar) + int nchar; + long Prenum; + int xchar; /* extra char from ":wincmd gx" or NUL */ +{ + long Prenum1; + win_T *wp; +#if defined(FEAT_SEARCHPATH) || defined(FEAT_FIND_ID) + char_u *ptr; +#endif +#ifdef FEAT_FIND_ID + int type = FIND_DEFINE; + int len; +#endif + char_u cbuf[40]; + + if (Prenum == 0) + Prenum1 = 1; + else + Prenum1 = Prenum; + +#ifdef FEAT_CMDWIN +# define CHECK_CMDWIN if (cmdwin_type != 0) { EMSG(_(e_cmdwin)); break; } +#else +# define CHECK_CMDWIN +#endif + + switch (nchar) + { +/* split current window in two parts, horizontally */ + case 'S': + case Ctrl_S: + case 's': + CHECK_CMDWIN +#ifdef FEAT_VISUAL + reset_VIsual_and_resel(); /* stop Visual mode */ +#endif +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_split((int)Prenum, 0); + break; + +#ifdef FEAT_VERTSPLIT +/* split current window in two parts, vertically */ + case Ctrl_V: + case 'v': + CHECK_CMDWIN +#ifdef FEAT_VISUAL + reset_VIsual_and_resel(); /* stop Visual mode */ +#endif +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_split((int)Prenum, WSP_VERT); + break; +#endif + +/* split current window and edit alternate file */ + case Ctrl_HAT: + case '^': + CHECK_CMDWIN +#ifdef FEAT_VISUAL + reset_VIsual_and_resel(); /* stop Visual mode */ +#endif + STRCPY(cbuf, "split #"); + if (Prenum) + sprintf((char *)cbuf + 7, "%ld", Prenum); + do_cmdline_cmd(cbuf); + break; + +/* open new window */ + case Ctrl_N: + case 'n': + CHECK_CMDWIN +#ifdef FEAT_VISUAL + reset_VIsual_and_resel(); /* stop Visual mode */ +#endif + if (Prenum) + sprintf((char *)cbuf, "%ld", Prenum); /* window height */ + else + cbuf[0] = NUL; + STRCAT(cbuf, "new"); + do_cmdline_cmd(cbuf); + break; + +/* quit current window */ + case Ctrl_Q: + case 'q': +#ifdef FEAT_VISUAL + reset_VIsual_and_resel(); /* stop Visual mode */ +#endif + do_cmdline_cmd((char_u *)"quit"); + break; + +/* close current window */ + case Ctrl_C: + case 'c': +#ifdef FEAT_VISUAL + reset_VIsual_and_resel(); /* stop Visual mode */ +#endif + do_cmdline_cmd((char_u *)"close"); + break; + +#if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX) +/* close preview window */ + case Ctrl_Z: + case 'z': + CHECK_CMDWIN +#ifdef FEAT_VISUAL + reset_VIsual_and_resel(); /* stop Visual mode */ +#endif + 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; +#endif + +/* close all but current window */ + case Ctrl_O: + case 'o': + CHECK_CMDWIN +#ifdef FEAT_VISUAL + reset_VIsual_and_resel(); /* stop Visual mode */ +#endif + 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 (lastwin == firstwin && 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 +#ifdef FEAT_VERTSPLIT + win_goto_ver(FALSE, Prenum1); +#else + for (wp = curwin; wp->w_next != NULL && Prenum1-- > 0; + wp = wp->w_next) + ; + win_goto(wp); +#endif + break; + +/* cursor to window above */ + case 'k': + case K_UP: + case Ctrl_K: + CHECK_CMDWIN +#ifdef FEAT_VERTSPLIT + win_goto_ver(TRUE, Prenum1); +#else + for (wp = curwin; wp->w_prev != NULL && Prenum1-- > 0; + wp = wp->w_prev) + ; + win_goto(wp); +#endif + break; + +#ifdef FEAT_VERTSPLIT +/* 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; +#endif + +/* 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 +#ifdef FEAT_VISUAL + reset_VIsual_and_resel(); /* stop Visual mode */ +#endif + win_rotate(FALSE, (int)Prenum1); /* downwards */ + break; + +/* rotate windows upwards */ + case 'R': + CHECK_CMDWIN +#ifdef FEAT_VISUAL + reset_VIsual_and_resel(); /* stop Visual mode */ +#endif + win_rotate(TRUE, (int)Prenum1); /* upwards */ + break; + +/* move window to the very top/bottom/left/right */ + case 'K': + case 'J': +#ifdef FEAT_VERTSPLIT + case 'H': + case 'L': +#endif + 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 '=': +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_equal(NULL, FALSE, 'b'); + break; + +/* increase current window height */ + case '+': +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_setheight(curwin->w_height + (int)Prenum1); + break; + +/* decrease current window height */ + case '-': +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_setheight(curwin->w_height - (int)Prenum1); + break; + +/* set current window height */ + case Ctrl__: + case '_': +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_setheight(Prenum ? (int)Prenum : 9999); + break; + +#ifdef FEAT_VERTSPLIT +/* increase current window width */ + case '>': +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_setwidth(curwin->w_width + (int)Prenum1); + break; + +/* decrease current window width */ + case '<': +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_setwidth(curwin->w_width - (int)Prenum1); + break; + +/* set current window width */ + case '|': +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_setwidth(Prenum != 0 ? (int)Prenum : 9999); + break; +#endif + +/* jump to tag and split window if tag exists (in preview window) */ +#if defined(FEAT_QUICKFIX) + case '}': + CHECK_CMDWIN + if (Prenum) + g_do_tagpreview = Prenum; + else + g_do_tagpreview = p_pvh; + /*FALLTHROUGH*/ +#endif + case ']': + case Ctrl_RSB: + CHECK_CMDWIN +#ifdef FEAT_VISUAL + reset_VIsual_and_resel(); /* stop Visual mode */ +#endif + 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; + +#ifdef FEAT_SEARCHPATH +/* edit file name under cursor in a new window */ + case 'f': + case Ctrl_F: + CHECK_CMDWIN +#ifdef FEAT_VISUAL + reset_VIsual_and_resel(); /* stop Visual mode */ +#endif + ptr = file_name_at_cursor(FNAME_MESS|FNAME_HYP|FNAME_EXP, + Prenum1); + if (ptr != NULL) + { +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + setpcmark(); + if (win_split(0, 0) == OK) + { +# ifdef FEAT_SCROLLBIND + curwin->w_p_scb = FALSE; +# endif + (void)do_ecmd(0, ptr, NULL, NULL, ECMD_LASTL, + ECMD_HIDE); + } + vim_free(ptr); + } + break; +#endif + +#ifdef FEAT_FIND_ID +/* Go to the first occurence 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; +#endif + +/* CTRL-W g extended commands */ + case 'g': + case Ctrl_G: + CHECK_CMDWIN +#ifdef USE_ON_FLY_SCROLL + dont_scroll = TRUE; /* disallow scrolling here */ +#endif + ++no_mapping; + ++allow_keys; /* no mapping for xchar, but allow key codes */ + if (xchar == NUL) + xchar = safe_vgetc(); +#ifdef FEAT_LANGMAP + LANGMAP_ADJUST(xchar, TRUE); +#endif + --no_mapping; + --allow_keys; +#ifdef FEAT_CMDL_INFO + (void)add_to_showcmd(xchar); +#endif + switch (xchar) + { +#if defined(FEAT_QUICKFIX) + case '}': + xchar = Ctrl_RSB; + if (Prenum) + g_do_tagpreview = Prenum; + else + g_do_tagpreview = p_pvh; + /*FALLTHROUGH*/ +#endif + case ']': + case Ctrl_RSB: +#ifdef FEAT_VISUAL + reset_VIsual_and_resel(); /* stop Visual mode */ +#endif + 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; + + 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(size, flags) + int size; + int flags; +{ + /* 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(); + else + clear_snapshot(); + + return win_split_ins(size, flags, NULL, 0); +} + +/* + * When "newwin" is NULL: split a window in two. + * When "newwin" is not NULL: insert this window at the far + * top/left/right/bottom. + * return FAIL for failure, OK otherwise + */ + static int +win_split_ins(size, flags, newwin, dir) + int size; + int flags; + win_T *newwin; + int dir; +{ + win_T *wp = newwin; + 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 && newwin == NULL) + { + EMSG(_(e_noroom)); + return FAIL; + } + need_status = STATUS_HEIGHT; + } + +#ifdef FEAT_VERTSPLIT + if (flags & WSP_VERT) + { + layout = FR_ROW; + do_equal = (p_ea && new_size == 0 && *p_ead != 'v'); + + /* + * 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 && newwin == 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; + } + else +#endif + { + layout = FR_COL; + do_equal = (p_ea && new_size == 0 +#ifdef FEAT_VERTSPLIT + && *p_ead != 'h' +#endif + ); + + /* + * 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 && newwin == 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; + } + } + + /* + * 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) + && ( +#ifdef FEAT_VERTSPLIT + (flags & WSP_VERT) ? p_spr : +#endif + p_sb)))) + { + /* new window below/right of current one */ + if (newwin == NULL) + wp = win_alloc(oldwin); + else + win_append(oldwin, wp); + } + else + { + if (newwin == NULL) + wp = win_alloc(oldwin->w_prev); + else + win_append(oldwin->w_prev, wp); + } + + if (newwin == NULL) + { + if (wp == NULL) + return FAIL; + + /* + * make the contents of the new window the same as the current one + */ + wp->w_buffer = curbuf; + curbuf->b_nwindows++; + wp->w_cursor = curwin->w_cursor; + wp->w_valid = 0; + wp->w_curswant = curwin->w_curswant; + wp->w_set_curswant = curwin->w_set_curswant; + wp->w_topline = curwin->w_topline; +#ifdef FEAT_DIFF + wp->w_topfill = curwin->w_topfill; +#endif + wp->w_leftcol = curwin->w_leftcol; + wp->w_pcmark = curwin->w_pcmark; + wp->w_prev_pcmark = curwin->w_prev_pcmark; + wp->w_alt_fnum = curwin->w_alt_fnum; + wp->w_fraction = curwin->w_fraction; + wp->w_prev_fraction_row = curwin->w_prev_fraction_row; +#ifdef FEAT_JUMPLIST + copy_jumplist(curwin, wp); +#endif + if (curwin->w_localdir != NULL) + wp->w_localdir = vim_strsave(curwin->w_localdir); + + /* Use the same argument list. */ + wp->w_alist = curwin->w_alist; + ++wp->w_alist->al_refcount; + wp->w_arg_idx = curwin->w_arg_idx; + + /* + * copy tagstack and options from existing window + */ + for (i = 0; i < curwin->w_tagstacklen; i++) + { + wp->w_tagstack[i] = curwin->w_tagstack[i]; + if (wp->w_tagstack[i].tagname != NULL) + wp->w_tagstack[i].tagname = + vim_strsave(wp->w_tagstack[i].tagname); + } + wp->w_tagstackidx = curwin->w_tagstackidx; + wp->w_tagstacklen = curwin->w_tagstacklen; + win_copy_options(curwin, wp); +#ifdef FEAT_FOLDING + copyFoldingState(curwin, wp); +#endif + } + + /* + * Reorganise the tree of frames to insert the new window. + */ + if (flags & (WSP_TOP | WSP_BOT)) + { +#ifdef FEAT_VERTSPLIT + if ((topframe->fr_layout == FR_COL && (flags & WSP_VERT) == 0) + || (topframe->fr_layout == FR_ROW && (flags & WSP_VERT) != 0)) +#else + if (topframe->fr_layout == FR_COL) +#endif + { + 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 +#ifdef FEAT_VERTSPLIT + if (flags & WSP_VERT) + before = !p_spr; + else +#endif + 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 = (frame_T *)alloc_clear((unsigned)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 (newwin == NULL) + { + /* Create a frame for the new window. */ + frp = (frame_T *)alloc_clear((unsigned)sizeof(frame_T)); + frp->fr_layout = FR_LEAF; + frp->fr_win = wp; + wp->w_frame = frp; + } + else + frp = newwin->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); + +#ifdef FEAT_VERTSPLIT + if (flags & WSP_VERT) + { + wp->w_p_scr = curwin->w_p_scr; + if (need_status) + { + --oldwin->w_height; + 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 = 0; + wp->w_height = 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; + wp->w_height = 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 */ + wp->w_width = 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); + } + else + 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 +#endif + { + /* width and column of new window is same as current window */ +#ifdef FEAT_VERTSPLIT + if (flags & (WSP_TOP | WSP_BOT)) + { + wp->w_wincol = 0; + wp->w_width = Columns; + wp->w_vsep_width = 0; + } + else + { + wp->w_wincol = oldwin->w_wincol; + wp->w_width = oldwin->w_width; + wp->w_vsep_width = oldwin->w_vsep_width; + } + frp->fr_width = curfrp->fr_width; +#endif + + /* "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; + } +#ifdef FEAT_VERTSPLIT + if (flags & WSP_BOT) + frame_add_statusline(curfrp); +#endif + 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 */ + } + + /* + * make the new window the current window and redraw + */ + if (do_equal || dir != 0) + win_equal(wp, TRUE, +#ifdef FEAT_VERTSPLIT + (flags & WSP_VERT) ? (dir == 'v' ? 'b' : 'h') + : dir == 'h' ? 'b' : +#endif + 'v'); + + /* Don't change the window height/width to 'winheight' / 'winwidth' if a + * size was given. */ +#ifdef FEAT_VERTSPLIT + if (flags & WSP_VERT) + { + i = p_wiw; + if (size != 0) + p_wiw = size; + +# ifdef FEAT_GUI + /* When 'guioptions' includes 'L' or 'R' may have to add scrollbars. */ + if (gui.in_use) + gui_init_which_components(NULL); +# endif + } + else +#endif + { + i = p_wh; + if (size != 0) + p_wh = size; + } + win_enter(wp, FALSE); +#ifdef FEAT_VERTSPLIT + if (flags & WSP_VERT) + p_wiw = i; + else +#endif + p_wh = i; + + return OK; +} + +#endif /* FEAT_WINDOWS */ + +#ifdef FEAT_VERTSPLIT +/* + * Return minimal height for window "wp" and windows east of it. + * Takes into account the eastbound windws can be split, each of them + * requireing p_wmh lines. Doesn't count status lines. + */ + static int +win_minheight(wp) + win_T *wp; +{ + int minheight = p_wmh; + int n; + win_T *wp1, *wp2; + + wp1 = wp; + for (;;) + { + wp1 = wp1->w_next; + if (wp1 == NULL) + break; + n = p_wmh; + wp2 = wp1; + for (;;) + { + wp2 = wp2->w_next; + if (wp2 == NULL) + break; + n += win_minheight(wp2); + } + if (n > minheight) + minheight = n; + } + return minheight; +} + +#endif + +#if defined(FEAT_WINDOWS) || defined(PROTO) +/* + * Check if "win" is a pointer to an existing window. + */ + int +win_valid(win) + 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() +{ + 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). + */ +/*ARGSUSED*/ + int +make_windows(count, vertical) + int count; + int vertical; /* split windows vertically if TRUE */ +{ + int maxcount; + int todo; + +#ifdef FEAT_VERTSPLIT + 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 +#endif + { + /* 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); + +#ifdef FEAT_AUTOCMD + /* + * Don't execute autocommands while creating the windows. Must do that + * when putting the buffers in the windows. + */ + ++autocmd_block; +#endif + + /* todo is number of windows left to create */ + for (todo = count - 1; todo > 0; --todo) +#ifdef FEAT_VERTSPLIT + if (vertical) + { + if (win_split(curwin->w_width - (curwin->w_width - todo) + / (todo + 1) - 1, WSP_VERT | WSP_ABOVE) == FAIL) + break; + } + else +#endif + { + if (win_split(curwin->w_height - (curwin->w_height - todo + * STATUS_HEIGHT) / (todo + 1) + - STATUS_HEIGHT, WSP_ABOVE) == FAIL) + break; + } + +#ifdef FEAT_AUTOCMD + --autocmd_block; +#endif + + /* return actual number of windows */ + return (count - todo); +} + +/* + * Exchange current and next window + */ + static void +win_exchange(Prenum) + 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; + } + +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + + /* + * 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); + frame_remove(curwin->w_frame); + win_append(wp->w_prev, curwin); + frame_insert(frp, curwin->w_frame); + } + if (wp != wp2) + { + win_remove(wp); + 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; +#ifdef FEAT_VERTSPLIT + 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); + } +#endif + + (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(upwards, count) + int upwards; + int count; +{ + win_T *wp1; + win_T *wp2; + frame_T *frp; + int n; + + if (firstwin == lastwin) /* nothing to do */ + { + beep_flush(); + return; + } + +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + +#ifdef FEAT_VERTSPLIT + /* 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; + } +#endif + + 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); + 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); + 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); +#ifdef FEAT_VERTSPLIT + 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); +#endif + + /* 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(size, flags) + 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); + win_remove(curwin); + 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'); + } + +#if defined(FEAT_GUI) && defined(FEAT_VERTSPLIT) + /* When 'guioptions' includes 'L' or 'R' may have to remove or add + * scrollbars. Have to update them anyway. */ + if (gui.in_use) + { + out_flush(); + gui_init_which_components(NULL); + gui_update_scrollbars(TRUE); + } + need_mouse_correct = TRUE; +#endif + +} + +/* + * Move window "win1" to below/right of "win2" and make "win1" the current + * window. Only works within the same frame! + */ + void +win_move_after(win1, win2) + win_T *win1, *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; +#ifdef FEAT_VERTSPLIT + win1->w_prev->w_vsep_width = 0; + win1->w_vsep_width = 1; +#endif + } + else if (win2 == lastwin) + { + height = win1->w_status_height; + win1->w_status_height = win2->w_status_height; + win2->w_status_height = height; +#ifdef FEAT_VERTSPLIT + win2->w_vsep_width = 1; + win1->w_vsep_width = 0; +#endif + } + win_remove(win1); + 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(next_curwin, current, dir) + 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) +#ifdef FEAT_VERTSPLIT + dir = *p_ead; +#else + dir = 'b'; +#endif + win_equal_rec(next_curwin == NULL ? curwin : next_curwin, current, + topframe, dir, 0, 0, (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(next_curwin, current, topfr, dir, col, row, width, height) + 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 +#ifdef FEAT_VERTSPLIT + || topfr->fr_width != width || topfr->fr_win->w_wincol != col +#endif + ) + { + topfr->fr_win->w_winrow = row; + frame_new_height(topfr, height, FALSE, FALSE); +#ifdef FEAT_VERTSPLIT + topfr->fr_win->w_wincol = col; + frame_new_width(topfr, width, FALSE); +#endif + redraw_all_later(CLEAR); + } + } +#ifdef FEAT_VERTSPLIT + 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); + + /* Compute room available for windows other than "next_curwin" */ + m = frame_minwidth(topfr, next_curwin); + room = width - m; + if (room < 0) + { + next_curwin_size = p_wiw + room; + room = 0; + } + else if (n == m) /* doesn't contain curwin */ + next_curwin_size = 0; + else + { + next_curwin_size = (room + p_wiw + (totwincount - 1) * p_wmw + + (totwincount - 1)) / totwincount; + if (next_curwin_size > p_wiw) + room -= next_curwin_size - p_wiw; + else + next_curwin_size = p_wiw; + } + if (n != m) + --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 + { + /* 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 (n != m) /* don't count next_curwin */ + --wincount; + new_size = (wincount * room + ((unsigned)totwincount >> 1)) + / totwincount; + if (n != m) /* add next_curwin size */ + { + next_curwin_size -= p_wiw - (m - n); + new_size += next_curwin_size; + } + } + + /* Skip frame that is full height 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 + n, height); + col += new_size + n; + width -= new_size + n; + if (n != m) /* contains curwin */ + room -= new_size - next_curwin_size; + else + room -= new_size; + totwincount -= wincount; + } + } +#endif + else /* topfr->fr_layout == FR_COL */ + { +#ifdef FEAT_VERTSPLIT + topfr->fr_width = width; +#endif + 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) + { + next_curwin_size = (room + p_wh + totwincount * 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 + ((unsigned)totwincount >> 1)) + / 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) + buf_T *buf; +{ + win_T *win; + + ++RedrawingDisabled; + for (win = firstwin; win != NULL && lastwin != firstwin; ) + { + if (win->w_buffer == buf) + { + win_close(win, FALSE); + win = firstwin; /* go back to the start */ + } + else + win = win->w_next; + } + --RedrawingDisabled; +} + +/* + * close window "win" + * If "free_buf" is TRUE related buffer may be unloaded. + * + * called by :quit, :close, :xit, :wq and findtag() + */ + void +win_close(win, free_buf) + win_T *win; + int free_buf; +{ + win_T *wp; +#ifdef FEAT_AUTOCMD + int other_buffer = FALSE; +#endif + int close_curwin = FALSE; + frame_T *frp; + int dir; + int help_window = FALSE; + + if (lastwin == firstwin) + { + EMSG(_("E444: Cannot close last window")); + return; + } + + /* 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->b_help) + help_window = TRUE; + else + clear_snapshot(); + +#ifdef FEAT_AUTOCMD + 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)); + + /* + * Be careful: If autocommands delete the window, return now. + */ + if (wp->w_buffer != curbuf) + { + other_buffer = TRUE; + apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, FALSE, curbuf); + if (!win_valid(win) || firstwin == lastwin) + return; + } + apply_autocmds(EVENT_WINLEAVE, NULL, NULL, FALSE, curbuf); + if (!win_valid(win) || firstwin == lastwin) + return; +# ifdef FEAT_EVAL + /* autocmds may abort script processing */ + if (aborting()) + return; +# endif + } +#endif + + /* + * Close the link to the buffer. + */ + close_buffer(win, win->w_buffer, free_buf ? DOBUF_UNLOAD : 0); + /* Autocommands may have closed the window already, or closed the only + * other window. */ + if (!win_valid(win) || firstwin == lastwin) + return; + + /* reduce the reference count to the argument list. */ + alist_unlink(win->w_alist); + + /* remove the window and its frame from the tree of frames. */ + frp = win->w_frame; + wp = winframe_remove(win, &dir); + vim_free(frp); + win_free(win); + + /* 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; +#ifdef FEAT_QUICKFIX + if (wp->w_p_pvw || bt_quickfix(wp->w_buffer)) + { + /* + * 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; + } + } + } +#endif + curbuf = curwin->w_buffer; + close_curwin = TRUE; + } + if (p_ea) + win_equal(curwin, TRUE, +#ifdef FEAT_VERTSPLIT + dir +#else + 0 +#endif + ); + else + win_comp_pos(); + if (close_curwin) + { + win_enter_ext(wp, FALSE, TRUE); +#ifdef FEAT_AUTOCMD + if (other_buffer) + /* careful: after this wp and win may be invalid! */ + apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf); +#endif + } + + /* + * 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(close_curwin); + +#if defined(FEAT_GUI) && defined(FEAT_VERTSPLIT) + /* When 'guioptions' includes 'L' or 'R' may have to remove scrollbars. */ + if (gui.in_use && !win_hasvertsplit()) + gui_init_which_components(NULL); +#endif + + redraw_all_later(NOT_VALID); +} + +/* + * Remove a window and its frame from the tree of frames. + * Returns a pointer to the window that got the freed up space. + */ +/*ARGSUSED*/ + static win_T * +winframe_remove(win, dirp) + win_T *win; + int *dirp; /* set to 'v' or 'h' for direction if 'ea' */ +{ + frame_T *frp, *frp2, *frp3; + frame_T *frp_close = win->w_frame; + win_T *wp; + int old_height = 0; + + /* + * Remove the window from its frame. + */ + frp2 = win_altframe(win); + wp = frame2win(frp2); + + /* Remove this frame from the list of frames. */ + frame_remove(frp_close); + +#ifdef FEAT_VERTSPLIT + if (frp_close->fr_parent->fr_layout == FR_COL) + { +#endif + /* When 'winfixheight' is set, remember its old size and restore + * it later (it's a simplistic solution...). Don't do this if the + * window will occupy the full height of the screen. */ + if (frp2->fr_win != NULL + && (frp2->fr_next != NULL || frp2->fr_prev != NULL) + && frp2->fr_win->w_p_wfh) + old_height = frp2->fr_win->w_height; + frame_new_height(frp2, frp2->fr_height + frp_close->fr_height, + frp2 == frp_close->fr_next ? TRUE : FALSE, FALSE); + if (old_height != 0) + win_setheight_win(old_height, frp2->fr_win); +#ifdef FEAT_VERTSPLIT + *dirp = 'v'; + } + else + { + frame_new_width(frp2, frp2->fr_width + frp_close->fr_width, + frp2 == frp_close->fr_next ? TRUE : FALSE); + *dirp = 'h'; + } +#endif + + /* 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; + vim_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; + } + } + vim_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) + win_T *win; +{ + frame_T *frp; + int b; + + frp = win->w_frame; +#ifdef FEAT_VERTSPLIT + if (frp->fr_parent->fr_layout == FR_ROW) + b = p_spr; + else +#endif + b = p_sb; + if ((!b && frp->fr_next != NULL) || frp->fr_prev == NULL) + return frp->fr_next; + return frp->fr_prev; +} + +/* + * Find the left-upper window in frame "frp". + */ + static win_T * +frame2win(frp) + 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(frp, wp) + 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(topfrp, height, topfirst, wfh) + 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); + } +#ifdef FEAT_VERTSPLIT + 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); + } +#endif + else + { + /* 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(frp) + 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; +} + +#ifdef FEAT_VERTSPLIT +/* + * Add a status line to windows at the bottom of "frp". + * Note: Does not check if there is room! + */ + static void +frame_add_statusline(frp) + 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(topfrp, width, leftfirst) + frame_T *topfrp; + int width; + int leftfirst; /* resize leftmost contained frame first */ +{ + 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) + { + /* 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); + } + else /* fr_layout == FR_ROW */ + { + /* Complicated case: Resize a row of frames. Resize the rightmost + * frame first, frames left of it when needed. */ + + /* Find the rightmost frame of this row */ + frp = topfrp->fr_child; + if (!leftfirst) + while (frp->fr_next != NULL) + frp = frp->fr_next; + + 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); + } + else + { + frame_new_width(frp, frp->fr_width + extra_cols, leftfirst); + break; + } + if (leftfirst) + frp = frp->fr_next; + else + frp = frp->fr_prev; + } + } + else if (extra_cols > 0) + { + /* increase width of rightmost frame */ + frame_new_width(frp, frp->fr_width + extra_cols, leftfirst); + } + } + 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(frp) + 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(wp) + win_T *wp; +{ + wp->w_frame->fr_width = wp->w_width + wp->w_vsep_width; +} +#endif + +/* + * Set frame height from the window it contains. + */ + static void +frame_fix_height(wp) + 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(topfrp, next_curwin) + frame_T *topfrp; + win_T *next_curwin; +{ + frame_T *frp; + int m; +#ifdef FEAT_VERTSPLIT + int n; +#endif + + 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; + } + } +#ifdef FEAT_VERTSPLIT + 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; + } + } +#endif + 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; +} + +#ifdef FEAT_VERTSPLIT +/* + * 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(topfrp, next_curwin) + 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; +} +#endif + + +/* + * 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(message, forceit) + int message; + int forceit; /* always hide all other windows */ +{ + win_T *wp; + win_T *nextwp; + int r; + + if (lastwin == firstwin) + { + if (message +#ifdef FEAT_AUTOCMD + && !autocmd_busy +#endif + ) + MSG(_("Already only one window")); + 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); +#ifdef FEAT_AUTOCMD + if (!win_valid(wp)) /* autocommands messed wp up */ + { + nextwp = firstwin; + continue; + } +#endif + if (!r) + { +#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG) + if (message && (p_confirm || cmdmod.confirm) && p_write) + { + dialog_changed(wp->w_buffer, FALSE); +# ifdef FEAT_AUTOCMD + if (!win_valid(wp)) /* autocommands messed wp up */ + { + nextwp = firstwin; + continue; + } +# endif + } + if (bufIsChanged(wp->w_buffer)) +#endif + continue; + } + win_close(wp, !P_HID(wp->w_buffer) && !bufIsChanged(wp->w_buffer)); + } + } + + /* + * If current window has a status line and we don't want one, + * remove the status line. + */ + if (lastwin != firstwin) + EMSG(_("E445: Other window contains changes")); +} + +#endif /* FEAT_WINDOWS */ + +/* + * init the cursor in the window + * + * called when a new file is being edited + */ + void +win_init(wp) + 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; +#ifdef FEAT_VIRTUALEDIT + wp->w_cursor.coladd = 0; +#endif + 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; +#ifdef FEAT_DIFF + wp->w_topfill = 0; +#endif + wp->w_botline = 2; +#ifdef FEAT_FKMAP + if (curwin->w_p_rl) + wp->w_farsi = W_CONV + W_R_L; + else + wp->w_farsi = W_CONV; +#endif +} + +/* + * Allocate the first window and put an empty buffer in it. + * Called from main(). + * When this fails we can't do anything: exit. + */ + void +win_alloc_first() +{ + curwin = win_alloc(NULL); + curbuf = buflist_new(NULL, NULL, 1L, BLN_LISTED); + if (curwin == NULL || curbuf == NULL) + mch_exit(0); + curwin->w_buffer = curbuf; + curbuf->b_nwindows = 1; /* there is one window */ +#ifdef FEAT_WINDOWS + curwin->w_alist = &global_alist; +#endif + win_init(curwin); /* init current window */ + + topframe = (frame_T *)alloc_clear((unsigned)sizeof(frame_T)); + if (topframe == NULL) + mch_exit(0); + topframe->fr_layout = FR_LEAF; +#ifdef FEAT_VERTSPLIT + topframe->fr_width = Columns; +#endif + topframe->fr_height = Rows - p_ch; + topframe->fr_win = curwin; + curwin->w_frame = topframe; +} + +#if defined(FEAT_WINDOWS) || defined(PROTO) + +/* + * 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(wp) + win_T *wp; +{ +#ifdef FEAT_CMDWIN + if (cmdwin_type != 0) + { + beep_flush(); + return; + } +#endif +#ifdef FEAT_VISUAL + if (wp->w_buffer != curbuf) + reset_VIsual_and_resel(); + else if (VIsual_active) + wp->w_cursor = curwin->w_cursor; +#endif + +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_enter(wp, TRUE); +} + +#if defined(FEAT_PERL) || defined(PROTO) +/* + * Find window number "winnr" (counting top to bottom). + */ + win_T * +win_find_nr(winnr) + int winnr; +{ + win_T *wp; + +# ifdef FEAT_WINDOWS + for (wp = firstwin; wp != NULL; wp = wp->w_next) + if (--winnr == 0) + break; + return wp; +# else + return curwin; +# endif +} +#endif + +#ifdef FEAT_VERTSPLIT +/* + * Move to window above or below "count" times. + */ + static void +win_goto_ver(up, count) + 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(left, count) + 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); +} +#endif + +/* + * Make window "wp" the current window. + */ + void +win_enter(wp, undo_sync) + win_T *wp; + int undo_sync; +{ + win_enter_ext(wp, undo_sync, FALSE); +} + +/* + * 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(wp, undo_sync, curwin_invalid) + win_T *wp; + int undo_sync; + int curwin_invalid; +{ +#ifdef FEAT_AUTOCMD + int other_buffer = FALSE; +#endif + + if (wp == curwin && !curwin_invalid) /* nothing to do */ + return; + +#ifdef FEAT_AUTOCMD + if (!curwin_invalid) + { + /* + * 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; +# ifdef FEAT_EVAL + /* autocmds may abort script processing */ + if (aborting()) + return; +# endif + } +#endif + + /* sync undo before leaving the current buffer */ + if (undo_sync && curbuf != wp->w_buffer) + u_sync(); + /* 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(); +#ifdef FEAT_VIRTUALEDIT + if (!virtual_active()) + curwin->w_cursor.coladd = 0; +#endif + 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 (mch_dirname(cwd, MAXPATHL) == OK) + globaldir = vim_strsave(cwd); + } + mch_chdir((char *)curwin->w_localdir); + 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. */ + mch_chdir((char *)globaldir); + vim_free(globaldir); + globaldir = NULL; + shorten_fnames(TRUE); + } + +#ifdef FEAT_AUTOCMD + apply_autocmds(EVENT_WINENTER, NULL, NULL, FALSE, curbuf); + if (other_buffer) + apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf); +#endif + +#ifdef FEAT_TITLE + maketitle(); +#endif + curwin->w_redr_status = 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); + +#ifdef FEAT_VERTSPLIT + /* set window width to desired minimal value */ + if (curwin->w_width < p_wiw) + win_setwidth((int)p_wiw); +#endif + +#ifdef FEAT_MOUSE + setmouse(); /* in case jumped to/from help buffer */ +#endif + +#if defined(FEAT_NETBEANS_INTG) || defined(FEAT_SUN_WORKSHOP) + /* Change directories when the acd option is set on and after + * switching windows. */ + if (p_acd && curbuf->b_ffname != NULL + && vim_chdirfile(curbuf->b_ffname) == OK) + shorten_fnames(TRUE); +#endif +} + +#endif /* FEAT_WINDOWS */ + +#if defined(FEAT_WINDOWS) || defined(FEAT_SIGNS) || defined(PROTO) +/* + * Jump to the first open window that contains buffer buf if one exists + * TODO: Alternatively jump to last open window? Dependent from 'splitbelow'? + * Returns pointer to window if it exists, otherwise NULL. + */ + win_T * +buf_jump_open_win(buf) + buf_T *buf; +{ +# ifdef FEAT_WINDOWS + win_T *wp; + + for (wp = firstwin; wp; wp = wp->w_next) + if (wp->w_buffer == buf) + break; + if (wp != NULL) + win_enter(wp, FALSE); + return wp; +# else + if (curwin->w_buffer == buf) + return curwin; + return NULL; +# endif +} +#endif + +/* + * allocate a window structure and link it in the window list + */ +/*ARGSUSED*/ + static win_T * +win_alloc(after) + win_T *after; +{ + win_T *newwin; + + /* + * allocate window structure and linesizes arrays + */ + newwin = (win_T *)alloc_clear((unsigned)sizeof(win_T)); + if (newwin != NULL && win_alloc_lines(newwin) == FAIL) + { + vim_free(newwin); + newwin = NULL; + } + + if (newwin != NULL) + { + /* + * link the window in the window list + */ +#ifdef FEAT_WINDOWS + win_append(after, newwin); +#endif +#ifdef FEAT_VERTSPLIT + newwin->w_wincol = 0; + newwin->w_width = Columns; +#endif + + /* position the display and the cursor at the top of the file. */ + newwin->w_topline = 1; +#ifdef FEAT_DIFF + newwin->w_topfill = 0; +#endif + newwin->w_botline = 2; + newwin->w_cursor.lnum = 1; +#ifdef FEAT_SCROLLBIND + newwin->w_scbind_pos = 1; +#endif + + /* We won't calculate w_fraction until resizing the window */ + newwin->w_fraction = 0; + newwin->w_prev_fraction_row = -1; + +#ifdef FEAT_GUI + if (gui.in_use) + { + out_flush(); + gui_create_scrollbar(&newwin->w_scrollbars[SBAR_LEFT], + SBAR_LEFT, newwin); + gui_create_scrollbar(&newwin->w_scrollbars[SBAR_RIGHT], + SBAR_RIGHT, newwin); + } +#endif +#ifdef FEAT_EVAL + var_init(&newwin->w_vars); /* init internal variables */ +#endif +#ifdef FEAT_FOLDING + foldInitWin(newwin); +#endif + } + return newwin; +} + +#if defined(FEAT_WINDOWS) || defined(PROTO) + +/* + * remove window 'wp' from the window list and free the structure + */ + static void +win_free(wp) + win_T *wp; +{ + int i; + +#ifdef FEAT_PERL + perl_win_free(wp); +#endif + +#ifdef FEAT_PYTHON + python_window_free(wp); +#endif + +#ifdef FEAT_TCL + tcl_window_free(wp); +#endif + +#ifdef FEAT_RUBY + ruby_window_free(wp); +#endif + + clear_winopt(&wp->w_onebuf_opt); + clear_winopt(&wp->w_allbuf_opt); + +#ifdef FEAT_EVAL + var_clear(&wp->w_vars); /* free all internal variables */ +#endif + + if (prevwin == wp) + prevwin = NULL; + win_free_lsize(wp); + + for (i = 0; i < wp->w_tagstacklen; ++i) + vim_free(wp->w_tagstack[i].tagname); + + vim_free(wp->w_localdir); +#ifdef FEAT_SEARCH_EXTRA + vim_free(wp->w_match.regprog); +#endif +#ifdef FEAT_JUMPLIST + free_jumplist(wp); +#endif + +#ifdef FEAT_GUI + if (gui.in_use) + { + out_flush(); + gui_mch_destroy_scrollbar(&wp->w_scrollbars[SBAR_LEFT]); + gui_mch_destroy_scrollbar(&wp->w_scrollbars[SBAR_RIGHT]); + } +#endif /* FEAT_GUI */ + + win_remove(wp); + vim_free(wp); +} + +/* + * Append window "wp" in the window list after window "after". + */ + static void +win_append(after, wp) + win_T *after, *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. + */ + static void +win_remove(wp) + win_T *wp; +{ + if (wp->w_prev != NULL) + wp->w_prev->w_next = wp->w_next; + else + firstwin = wp->w_next; + if (wp->w_next != NULL) + wp->w_next->w_prev = wp->w_prev; + else + lastwin = wp->w_prev; +} + +/* + * Append frame "frp" in a frame list after frame "after". + */ + static void +frame_append(after, frp) + frame_T *after, *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(before, frp) + frame_T *before, *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(frp) + 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; +} + +#endif /* FEAT_WINDOWS */ + +/* + * Allocate w_lines[] for window "wp". + * Return FAIL for failure, OK for success. + */ + int +win_alloc_lines(wp) + win_T *wp; +{ + wp->w_lines_valid = 0; + wp->w_lines = (wline_T *)alloc((unsigned)(Rows * sizeof(wline_T))); + if (wp->w_lines == NULL) + return FAIL; + return OK; +} + +/* + * free lsize arrays for a window + */ + void +win_free_lsize(wp) + win_T *wp; +{ + vim_free(wp->w_lines); + wp->w_lines = NULL; +} + +/* + * Called from win_new_shellsize() after Rows changed. + */ + void +shell_new_rows() +{ + int h = (int)(Rows - p_ch); + + if (firstwin == NULL) /* not initialized yet */ + return; +#ifdef FEAT_WINDOWS + if (h < frame_minheight(topframe, NULL)) + h = frame_minheight(topframe, NULL); + /* First try setting the heights of windows without 'winfixheight'. If + * that doesn't result in the right height, forget about that option. */ + frame_new_height(topframe, h, FALSE, TRUE); + if (topframe->fr_height != h) + frame_new_height(topframe, h, FALSE, FALSE); + + (void)win_comp_pos(); /* recompute w_winrow and w_wincol */ +#else + if (h < 1) + h = 1; + win_new_height(firstwin, h); +#endif + compute_cmdrow(); +#if 0 + /* Disabled: don't want making the screen smaller make a window larger. */ + if (p_ea) + win_equal(curwin, FALSE, 'v'); +#endif +} + +#if defined(FEAT_VERTSPLIT) || defined(PROTO) +/* + * Called from win_new_shellsize() after Columns changed. + */ + void +shell_new_columns() +{ + if (firstwin == NULL) /* not initialized yet */ + return; + frame_new_width(topframe, (int)Columns, FALSE); + (void)win_comp_pos(); /* recompute w_winrow and w_wincol */ +#if 0 + /* Disabled: don't want making the screen smaller make a window larger. */ + if (p_ea) + win_equal(curwin, FALSE, 'h'); +#endif +} +#endif + +#if defined(FEAT_CMDWIN) || defined(PROTO) +/* + * Save the size of all windows in "gap". + */ + void +win_size_save(gap) + garray_T *gap; + +{ + win_T *wp; + + ga_init2(gap, (int)sizeof(int), 1); + if (ga_grow(gap, win_count() * 2) == OK) + 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(gap) + 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(); + } +} +#endif /* FEAT_CMDWIN */ + +#if defined(FEAT_WINDOWS) || defined(PROTO) +/* + * Update the position for all windows, using the width and height of the + * frames. + * Returns the row just after the last window. + */ + static int +win_comp_pos() +{ + int row = 0; + 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(topfrp, row, col) + frame_T *topfrp; + int *row; + int *col; +{ + win_T *wp; + frame_T *frp; +#ifdef FEAT_VERTSPLIT + int startcol; + int startrow; +#endif + + wp = topfrp->fr_win; + if (wp != NULL) + { + if (wp->w_winrow != *row +#ifdef FEAT_VERTSPLIT + || wp->w_wincol != *col +#endif + ) + { + /* position changed, redraw */ + wp->w_winrow = *row; +#ifdef FEAT_VERTSPLIT + wp->w_wincol = *col; +#endif + redraw_win_later(wp, NOT_VALID); + wp->w_redr_status = TRUE; + } + *row += wp->w_height + wp->w_status_height; +#ifdef FEAT_VERTSPLIT + *col += wp->w_width + wp->w_vsep_width; +#endif + } + else + { +#ifdef FEAT_VERTSPLIT + startrow = *row; + startcol = *col; +#endif + for (frp = topfrp->fr_child; frp != NULL; frp = frp->fr_next) + { +#ifdef FEAT_VERTSPLIT + 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 */ +#endif + frame_comp_pos(frp, row, col); + } + } +} + +#endif /* FEAT_WINDOWS */ + +/* + * Set current window height and take care of repositioning other windows to + * fit around it. + */ + void +win_setheight(height) + 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(height, 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. */ +#ifdef FEAT_WINDOWS + if (height < p_wmh) + height = p_wmh; +#endif + if (height == 0) + height = 1; + } + +#ifdef FEAT_WINDOWS + frame_setheight(win->w_frame, height + win->w_status_height); + + /* recompute the window positions */ + row = win_comp_pos(); +#else + if (height > topframe->fr_height) + height = topframe->fr_height; + win->w_height = height; + row = height; +#endif + + /* + * 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); +} + +#if defined(FEAT_WINDOWS) || defined(PROTO) + +/* + * 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(curfrp, height) + 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 - p_ch) + height = Rows - p_ch; + 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. + */ +#ifdef FEAT_VERTSPLIT + /* + * 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) +#else + for (;;) +#endif + { + 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); + } +#ifdef FEAT_VERTSPLIT + if (curfrp->fr_width != Columns) + room_cmdline = 0; + else +#endif + { + 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; +#ifdef FEAT_VERTSPLIT + if (run == 2 || curfrp->fr_width == Columns) +#endif + { + if (height > room + room_cmdline) + height = room + room_cmdline; + break; + } +#ifdef FEAT_VERTSPLIT + frame_setheight(curfrp->fr_parent, height + + frame_minheight(curfrp->fr_parent, NOWIN) - (int)p_wmh - 1); +#endif + /*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; + } + } + } +} + +#if defined(FEAT_VERTSPLIT) || defined(PROTO) +/* + * Set current window width and take care of repositioning other windows to + * fit around it. + */ + void +win_setwidth(width) + int width; +{ + win_setwidth_win(width, curwin); +} + + void +win_setwidth_win(width, wp) + 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(curfrp, width) + 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; + + /* 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; + for (frp = curfrp->fr_parent->fr_child; frp != NULL; + frp = frp->fr_next) + { + room += frp->fr_width; + if (frp != curfrp) + room -= frame_minwidth(frp, NULL); + } + + if (width <= room) + break; + if (run == 2 || curfrp->fr_height >= Rows - p_ch) + { + 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; + + /* + * set the current frame to the new width + */ + frame_new_width(curfrp, width, 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 (frp->fr_width - take < w) + { + take -= frp->fr_width - w; + frame_new_width(frp, w, FALSE); + } + else + { + frame_new_width(frp, frp->fr_width - take, FALSE); + take = 0; + } + if (run == 0) + frp = frp->fr_next; + else + frp = frp->fr_prev; + } + } + } +} +#endif /* FEAT_VERTSPLIT */ + +/* + * Check 'winminheight' for a valid value. + */ + void +win_setminheight() +{ + 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; + } + } +} + +#ifdef FEAT_MOUSE + +/* + * Status line of dragwin is dragged "offset" lines down (negative is up). + */ + void +win_drag_status_line(dragwin, offset) + 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; + redraw_all_later(NOT_VALID); + showmode(); +} + +#ifdef FEAT_VERTSPLIT +/* + * Separator line of dragwin is dragged "offset" lines right (negative is left). + */ + void +win_drag_vsep_line(dragwin, offset) + 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 happe?) */ + 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); + + /* 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); + } + else + { + frame_new_width(fr, fr->fr_width - offset, !left); + break; + } + if (left) + fr = fr->fr_prev; + else + fr = fr->fr_next; + } + (void)win_comp_pos(); + redraw_all_later(NOT_VALID); +} +#endif /* FEAT_VERTSPLIT */ +#endif /* FEAT_MOUSE */ + +#endif /* FEAT_WINDOWS */ + +/* + * 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. + */ + static void +win_new_height(wp, height) + win_T *wp; + int height; +{ + linenr_T lnum; + int sline, line_size; +#define FRACTION_MULT 16384L + + /* 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_wrow != wp->w_prev_fraction_row && wp->w_height > 0) + wp->w_fraction = ((long)wp->w_wrow * FRACTION_MULT + + FRACTION_MULT / 2) / (long)wp->w_height; + + 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 +#ifdef FEAT_SCROLLBIND + && (!wp->w_p_scb || wp == curwin) +#endif + ) + { + 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) + { + /* + * Cursor line would go off top of screen if w_wrow was this high. + */ + wp->w_wrow = line_size; + } + else + { + while (sline > 0 && lnum > 1) + { +#ifdef FEAT_FOLDING + hasFoldingWin(wp, lnum, &lnum, NULL, TRUE, NULL); + if (lnum == 1) + { + /* first line in buffer is folded */ + line_size = 1; + --sline; + break; + } +#endif + --lnum; +#ifdef FEAT_DIFF + if (lnum == wp->w_topline) + line_size = plines_win_nofill(wp, lnum, TRUE) + + wp->w_topfill; + else +#endif + 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. + */ +#ifdef FEAT_FOLDING + hasFoldingWin(wp, lnum, NULL, &lnum, TRUE, NULL); +#endif + 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, NOT_VALID); +#ifdef FEAT_WINDOWS + wp->w_redr_status = TRUE; +#endif + invalidate_botline_win(wp); +} + +#ifdef FEAT_VERTSPLIT +/* + * Set the width of a window. + */ + static void +win_new_width(wp, 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; +} +#endif + + void +win_comp_scroll(wp) + win_T *wp; +{ + wp->w_p_scr = ((unsigned)wp->w_height >> 1); + if (wp->w_p_scr == 0) + wp->w_p_scr = 1; +} + +/* + * command_height: called whenever p_ch has been changed + */ + void +command_height(old_p_ch) + long old_p_ch; +{ +#ifdef FEAT_WINDOWS + int h; + frame_T *frp; + + /* Find bottom frame with width of screen. */ + frp = lastwin->w_frame; +# ifdef FEAT_VERTSPLIT + while (frp->fr_width != Columns && frp->fr_parent != NULL) + frp = frp->fr_parent; +# endif + + /* 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; + 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(); +#else + win_setheight((int)(firstwin->w_height + old_p_ch - p_ch)); + cmdline_row = Rows - p_ch; +#endif +} + +#if defined(FEAT_WINDOWS) || defined(PROTO) +/* + * 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(frp, n) + 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; + } +} + +/* + * Add or remove a status line for the bottom window(s), according to the + * value of 'laststatus'. + */ + void +last_status(morewin) + 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(fr, statusline) + 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(NOT_VALID); + } + } +#ifdef FEAT_VERTSPLIT + 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); + } +#endif + 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); + } +} + +#endif /* FEAT_WINDOWS */ + +#if defined(FEAT_SEARCHPATH) || defined(PROTO) +/* + * 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(options, count) + int options; + long count; +{ + return file_name_in_line(ml_get_curline(), + curwin->w_cursor.col, options, count, curbuf->b_ffname); +} + +/* + * Return the name of the file under or after ptr[col]. + * Otherwise like file_name_at_cursor(). + */ + char_u * +file_name_in_line(line, col, options, count, rel_fname) + char_u *line; + int col; + int options; + long count; + char_u *rel_fname; /* file we are searching relative to */ +{ + 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)) + ++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) + { +#ifdef FEAT_MBYTE + if (has_mbyte && (len = (*mb_head_off)(line, ptr - 1)) > 0) + ptr -= len + 1; + else +#endif + 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))) +#ifdef FEAT_MBYTE + if (has_mbyte) + len += (*mb_ptr2len_check)(ptr + len); + else +#endif + ++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; + + return find_file_name_in_path(ptr, len, options, count, rel_fname); +} + +# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL) +static char_u *eval_includeexpr __ARGS((char_u *ptr, int len)); + + static char_u * +eval_includeexpr(ptr, len) + char_u *ptr; + int len; +{ + char_u *res; + + set_vim_var_string(VV_FNAME, ptr, len); + res = eval_to_string_safe(curbuf->b_p_inex, NULL); + set_vim_var_string(VV_FNAME, NULL, 0); + return res; +} +#endif + +/* + * Return the name of the file ptr[len] in 'path'. + * Otherwise like file_name_at_cursor(). + */ + char_u * +find_file_name_in_path(ptr, len, options, count, rel_fname) + char_u *ptr; + int len; + int options; + long count; + char_u *rel_fname; /* file we are searching relative to */ +{ + char_u *file_name; + int c; +# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL) + char_u *tofree = NULL; + + if ((options & FNAME_INCL) && *curbuf->b_p_inex != NUL) + { + tofree = eval_includeexpr(ptr, len); + if (tofree != NULL) + { + ptr = tofree; + len = (int)STRLEN(ptr); + } + } +# endif + + if (options & FNAME_EXP) + { + file_name = find_file_in_path(ptr, len, options & ~FNAME_MESS, + TRUE, rel_fname); + +# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL) + /* + * If the file could not be found in a normal way, try applying + * 'includeexpr' (unless done already). + */ + if (file_name == NULL + && !(options & FNAME_INCL) && *curbuf->b_p_inex != NUL) + { + tofree = eval_includeexpr(ptr, len); + if (tofree != NULL) + { + ptr = tofree; + len = (int)STRLEN(ptr); + file_name = find_file_in_path(ptr, len, options & ~FNAME_MESS, + TRUE, rel_fname); + } + } +# endif + if (file_name == NULL && (options & FNAME_MESS)) + { + c = ptr[len]; + ptr[len] = NUL; + EMSG2(_("E447: Can't find file \"%s\" in path"), ptr); + ptr[len] = c; + } + + /* Repeat finding the file "count" times. This matters when it + * appears several times in the path. */ + while (file_name != NULL && --count > 0) + { + vim_free(file_name); + file_name = find_file_in_path(ptr, len, options, FALSE, rel_fname); + } + } + else + file_name = vim_strnsave(ptr, len); + +# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL) + vim_free(tofree); +# endif + + return file_name; +} +#endif /* FEAT_SEARCHPATH */ + +/* + * Check if the "://" of a URL is at the pointer, return URL_SLASH. + * Also check for ":\\", which MS Internet Explorer accepts, return + * URL_BACKSLASH. + */ + static int +path_is_url(p) + char_u *p; +{ + if (STRNCMP(p, "://", (size_t)3) == 0) + return URL_SLASH; + else if (STRNCMP(p, ":\\\\", (size_t)3) == 0) + return URL_BACKSLASH; + return 0; +} + +/* + * Check if "fname" starts with "name://". Return URL_SLASH if it does. + * Return URL_BACKSLASH for "name:\\". + * Return zero otherwise. + */ + int +path_with_url(fname) + char_u *fname; +{ + char_u *p; + + for (p = fname; isalpha(*p); ++p) + ; + return path_is_url(p); +} + +/* + * Return TRUE if "name" is a full (absolute) path name or URL. + */ + int +vim_isAbsName(name) + char_u *name; +{ + return (path_with_url(name) != 0 || mch_isFullName(name)); +} + +/* + * Get absolute file name into buffer 'buf' of length 'len' bytes. + * + * return FAIL for failure, OK otherwise + */ + int +vim_FullName(fname, buf, len, force) + char_u *fname, *buf; + int len; + int force; +{ + int retval = OK; + int url; + + *buf = NUL; + if (fname == NULL) + return FAIL; + + url = path_with_url(fname); + if (!url) + retval = mch_FullName(fname, buf, len, force); + if (url || retval == FAIL) + { + /* something failed; use the file name (truncate when too long) */ + STRNCPY(buf, fname, len); + buf[len - 1] = NUL; + } +#if defined(MACOS_CLASSIC) || defined(OS2) || defined(MSDOS) || defined(MSWIN) + slash_adjust(buf); +#endif + return retval; +} + +/* + * Return the minimal number of rows that is needed on the screen to display + * the current number of windows. + */ + int +min_rows() +{ + int total; + + if (firstwin == NULL) /* not initialized yet */ + return MIN_LINES; + + total = 1; /* count the room for the command line */ +#ifdef FEAT_WINDOWS + total += frame_minheight(topframe, NULL); +#else + total += 1; /* at least one window should have a line! */ +#endif + return total; +} + +/* + * Return TRUE if there is only one window, not counting a help or preview + * window, unless it is the current window. + */ + int +only_one_window() +{ +#ifdef FEAT_WINDOWS + int count = 0; + win_T *wp; + + for (wp = firstwin; wp != NULL; wp = wp->w_next) + if (!(wp->w_buffer->b_help +# ifdef FEAT_QUICKFIX + || wp->w_p_pvw +# endif + ) || wp == curwin) + ++count; + return (count <= 1); +#else + return TRUE; +#endif +} + +#if defined(FEAT_WINDOWS) || defined(FEAT_AUTOCMD) || defined(PROTO) +/* + * 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(do_curwin) + int do_curwin; +{ + win_T *wp; + +#ifdef FEAT_WINDOWS + for (wp = firstwin; wp != NULL; wp = wp->w_next) + if ((do_curwin || wp != curwin) && wp->w_buffer == curbuf) +#else + wp = curwin; + if (do_curwin) +#endif + { + 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; + } +} +#endif + +#if defined(FEAT_WINDOWS) || defined(PROTO) + +/* + * 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) + */ +static frame_T *snapshot = NULL; + +/* + * Create a snapshot of the current frame sizes. + */ + static void +make_snapshot() +{ + clear_snapshot(); + make_snapshot_rec(topframe, &snapshot); +} + + static void +make_snapshot_rec(fr, frp) + frame_T *fr; + frame_T **frp; +{ + *frp = (frame_T *)alloc_clear((unsigned)sizeof(frame_T)); + if (*frp == NULL) + return; + (*frp)->fr_layout = fr->fr_layout; +# ifdef FEAT_VERTSPLIT + (*frp)->fr_width = fr->fr_width; +# endif + (*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() +{ + clear_snapshot_rec(snapshot); + snapshot = NULL; +} + + static void +clear_snapshot_rec(fr) + frame_T *fr; +{ + if (fr != NULL) + { + clear_snapshot_rec(fr->fr_next); + clear_snapshot_rec(fr->fr_child); + vim_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. + */ + static void +restore_snapshot(close_curwin) + int close_curwin; /* closing current window */ +{ + win_T *wp; + + if (snapshot != NULL +# ifdef FEAT_VERTSPLIT + && snapshot->fr_width == topframe->fr_width +# endif + && snapshot->fr_height == topframe->fr_height + && check_snapshot_rec(snapshot, topframe) == OK) + { + wp = restore_snapshot_rec(snapshot, topframe); + win_comp_pos(); + if (wp != NULL && close_curwin) + win_goto(wp); + redraw_all_later(CLEAR); + } + clear_snapshot(); +} + +/* + * Check if frames "sn" and "fr" have the same layout, same following frames + * and same children. + */ + static int +check_snapshot_rec(sn, fr) + 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(sn, fr) + frame_T *sn; + frame_T *fr; +{ + win_T *wp = NULL; + win_T *wp2; + + fr->fr_height = sn->fr_height; +# ifdef FEAT_VERTSPLIT + fr->fr_width = sn->fr_width; +# endif + if (fr->fr_layout == FR_LEAF) + { + frame_new_height(fr, fr->fr_height, FALSE, FALSE); +# ifdef FEAT_VERTSPLIT + frame_new_width(fr, fr->fr_width, FALSE); +# endif + 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; +} + +#endif + +#if (defined(FEAT_GUI) && defined(FEAT_VERTSPLIT)) || defined(PROTO) +/* + * Return TRUE if there is any vertically split window. + */ + int +win_hasvertsplit() +{ + frame_T *fr; + + if (topframe->fr_layout == FR_ROW) + return TRUE; + + if (topframe->fr_layout == FR_COL) + for (fr = topframe->fr_child; fr != NULL; fr = fr->fr_next) + if (fr->fr_layout == FR_ROW) + return TRUE; + + return FALSE; +} +#endif |