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Copy pathfold.c
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3612 lines (3310 loc) · 90.1 KB
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/* vi:set ts=8 sts=4 sw=4 noet:
* vim600:fdm=marker fdl=1 fdc=3:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* fold.c: code for folding
*/
#include "vim.h"
#if defined(FEAT_FOLDING) || defined(PROTO)
/* local declarations. {{{1 */
/* typedef fold_T {{{2 */
/*
* The toplevel folds for each window are stored in the w_folds growarray.
* Each toplevel fold can contain an array of second level folds in the
* fd_nested growarray.
* The info stored in both growarrays is the same: An array of fold_T.
*/
typedef struct
{
linenr_T fd_top; /* first line of fold; for nested fold
* relative to parent */
linenr_T fd_len; /* number of lines in the fold */
garray_T fd_nested; /* array of nested folds */
char fd_flags; /* see below */
char fd_small; /* TRUE, FALSE or MAYBE: fold smaller than
'foldminlines'; MAYBE applies to nested
folds too */
} fold_T;
#define FD_OPEN 0 /* fold is open (nested ones can be closed) */
#define FD_CLOSED 1 /* fold is closed */
#define FD_LEVEL 2 /* depends on 'foldlevel' (nested folds too) */
#define MAX_LEVEL 20 /* maximum fold depth */
/* static functions {{{2 */
static void newFoldLevelWin(win_T *wp);
static int checkCloseRec(garray_T *gap, linenr_T lnum, int level);
static int foldFind(garray_T *gap, linenr_T lnum, fold_T **fpp);
static int foldLevelWin(win_T *wp, linenr_T lnum);
static void checkupdate(win_T *wp);
static void setFoldRepeat(linenr_T lnum, long count, int do_open);
static linenr_T setManualFold(linenr_T lnum, int opening, int recurse, int *donep);
static linenr_T setManualFoldWin(win_T *wp, linenr_T lnum, int opening, int recurse, int *donep);
static void foldOpenNested(fold_T *fpr);
static void deleteFoldEntry(garray_T *gap, int idx, int recursive);
static void foldMarkAdjustRecurse(garray_T *gap, linenr_T line1, linenr_T line2, long amount, long amount_after);
static int getDeepestNestingRecurse(garray_T *gap);
static int check_closed(win_T *win, fold_T *fp, int *use_levelp, int level, int *maybe_smallp, linenr_T lnum_off);
static void checkSmall(win_T *wp, fold_T *fp, linenr_T lnum_off);
static void setSmallMaybe(garray_T *gap);
static void foldCreateMarkers(linenr_T start, linenr_T end);
static void foldAddMarker(linenr_T lnum, char_u *marker, int markerlen);
static void deleteFoldMarkers(fold_T *fp, int recursive, linenr_T lnum_off);
static void foldDelMarker(linenr_T lnum, char_u *marker, int markerlen);
static void foldUpdateIEMS(win_T *wp, linenr_T top, linenr_T bot);
static void parseMarker(win_T *wp);
static char *e_nofold = N_("E490: No fold found");
/*
* While updating the folds lines between invalid_top and invalid_bot have an
* undefined fold level. Only used for the window currently being updated.
*/
static linenr_T invalid_top = (linenr_T)0;
static linenr_T invalid_bot = (linenr_T)0;
/*
* When using 'foldexpr' we sometimes get the level of the next line, which
* calls foldlevel() to get the level of the current line, which hasn't been
* stored yet. To get around this chicken-egg problem the level of the
* previous line is stored here when available. prev_lnum is zero when the
* level is not available.
*/
static linenr_T prev_lnum = 0;
static int prev_lnum_lvl = -1;
/* Flags used for "done" argument of setManualFold. */
#define DONE_NOTHING 0
#define DONE_ACTION 1 /* did close or open a fold */
#define DONE_FOLD 2 /* did find a fold */
static int foldstartmarkerlen;
static char_u *foldendmarker;
static int foldendmarkerlen;
/* Exported folding functions. {{{1 */
/* copyFoldingState() {{{2 */
#if defined(FEAT_WINDOWS) || defined(PROTO)
/*
* Copy that folding state from window "wp_from" to window "wp_to".
*/
void
copyFoldingState(win_T *wp_from, win_T *wp_to)
{
wp_to->w_fold_manual = wp_from->w_fold_manual;
wp_to->w_foldinvalid = wp_from->w_foldinvalid;
cloneFoldGrowArray(&wp_from->w_folds, &wp_to->w_folds);
}
#endif
/* hasAnyFolding() {{{2 */
/*
* Return TRUE if there may be folded lines in the current window.
*/
int
hasAnyFolding(win_T *win)
{
/* very simple now, but can become more complex later */
return (win->w_p_fen
&& (!foldmethodIsManual(win) || win->w_folds.ga_len > 0));
}
/* hasFolding() {{{2 */
/*
* Return TRUE if line "lnum" in the current window is part of a closed
* fold.
* When returning TRUE, *firstp and *lastp are set to the first and last
* lnum of the sequence of folded lines (skipped when NULL).
*/
int
hasFolding(linenr_T lnum, linenr_T *firstp, linenr_T *lastp)
{
return hasFoldingWin(curwin, lnum, firstp, lastp, TRUE, NULL);
}
/* hasFoldingWin() {{{2 */
int
hasFoldingWin(
win_T *win,
linenr_T lnum,
linenr_T *firstp,
linenr_T *lastp,
int cache, /* when TRUE: use cached values of window */
foldinfo_T *infop) /* where to store fold info */
{
int had_folded = FALSE;
linenr_T first = 0;
linenr_T last = 0;
linenr_T lnum_rel = lnum;
int x;
fold_T *fp;
int level = 0;
int use_level = FALSE;
int maybe_small = FALSE;
garray_T *gap;
int low_level = 0;
checkupdate(win);
/*
* Return quickly when there is no folding at all in this window.
*/
if (!hasAnyFolding(win))
{
if (infop != NULL)
infop->fi_level = 0;
return FALSE;
}
if (cache)
{
/*
* First look in cached info for displayed lines. This is probably
* the fastest, but it can only be used if the entry is still valid.
*/
x = find_wl_entry(win, lnum);
if (x >= 0)
{
first = win->w_lines[x].wl_lnum;
last = win->w_lines[x].wl_lastlnum;
had_folded = win->w_lines[x].wl_folded;
}
}
if (first == 0)
{
/*
* Recursively search for a fold that contains "lnum".
*/
gap = &win->w_folds;
for (;;)
{
if (!foldFind(gap, lnum_rel, &fp))
break;
/* Remember lowest level of fold that starts in "lnum". */
if (lnum_rel == fp->fd_top && low_level == 0)
low_level = level + 1;
first += fp->fd_top;
last += fp->fd_top;
/* is this fold closed? */
had_folded = check_closed(win, fp, &use_level, level,
&maybe_small, lnum - lnum_rel);
if (had_folded)
{
/* Fold closed: Set last and quit loop. */
last += fp->fd_len - 1;
break;
}
/* Fold found, but it's open: Check nested folds. Line number is
* relative to containing fold. */
gap = &fp->fd_nested;
lnum_rel -= fp->fd_top;
++level;
}
}
if (!had_folded)
{
if (infop != NULL)
{
infop->fi_level = level;
infop->fi_lnum = lnum - lnum_rel;
infop->fi_low_level = low_level == 0 ? level : low_level;
}
return FALSE;
}
if (last > win->w_buffer->b_ml.ml_line_count)
last = win->w_buffer->b_ml.ml_line_count;
if (lastp != NULL)
*lastp = last;
if (firstp != NULL)
*firstp = first;
if (infop != NULL)
{
infop->fi_level = level + 1;
infop->fi_lnum = first;
infop->fi_low_level = low_level == 0 ? level + 1 : low_level;
}
return TRUE;
}
/* foldLevel() {{{2 */
/*
* Return fold level at line number "lnum" in the current window.
*/
int
foldLevel(linenr_T lnum)
{
/* While updating the folds lines between invalid_top and invalid_bot have
* an undefined fold level. Otherwise update the folds first. */
if (invalid_top == (linenr_T)0)
checkupdate(curwin);
else if (lnum == prev_lnum && prev_lnum_lvl >= 0)
return prev_lnum_lvl;
else if (lnum >= invalid_top && lnum <= invalid_bot)
return -1;
/* Return quickly when there is no folding at all in this window. */
if (!hasAnyFolding(curwin))
return 0;
return foldLevelWin(curwin, lnum);
}
/* lineFolded() {{{2 */
/*
* Low level function to check if a line is folded. Doesn't use any caching.
* Return TRUE if line is folded.
* Return FALSE if line is not folded.
* Return MAYBE if the line is folded when next to a folded line.
*/
int
lineFolded(win_T *win, linenr_T lnum)
{
return foldedCount(win, lnum, NULL) != 0;
}
/* foldedCount() {{{2 */
/*
* Count the number of lines that are folded at line number "lnum".
* Normally "lnum" is the first line of a possible fold, and the returned
* number is the number of lines in the fold.
* Doesn't use caching from the displayed window.
* Returns number of folded lines from "lnum", or 0 if line is not folded.
* When "infop" is not NULL, fills *infop with the fold level info.
*/
long
foldedCount(win_T *win, linenr_T lnum, foldinfo_T *infop)
{
linenr_T last;
if (hasFoldingWin(win, lnum, NULL, &last, FALSE, infop))
return (long)(last - lnum + 1);
return 0;
}
/* foldmethodIsManual() {{{2 */
/*
* Return TRUE if 'foldmethod' is "manual"
*/
int
foldmethodIsManual(win_T *wp)
{
return (wp->w_p_fdm[3] == 'u');
}
/* foldmethodIsIndent() {{{2 */
/*
* Return TRUE if 'foldmethod' is "indent"
*/
int
foldmethodIsIndent(win_T *wp)
{
return (wp->w_p_fdm[0] == 'i');
}
/* foldmethodIsExpr() {{{2 */
/*
* Return TRUE if 'foldmethod' is "expr"
*/
int
foldmethodIsExpr(win_T *wp)
{
return (wp->w_p_fdm[1] == 'x');
}
/* foldmethodIsMarker() {{{2 */
/*
* Return TRUE if 'foldmethod' is "marker"
*/
int
foldmethodIsMarker(win_T *wp)
{
return (wp->w_p_fdm[2] == 'r');
}
/* foldmethodIsSyntax() {{{2 */
/*
* Return TRUE if 'foldmethod' is "syntax"
*/
int
foldmethodIsSyntax(win_T *wp)
{
return (wp->w_p_fdm[0] == 's');
}
/* foldmethodIsDiff() {{{2 */
/*
* Return TRUE if 'foldmethod' is "diff"
*/
int
foldmethodIsDiff(win_T *wp)
{
return (wp->w_p_fdm[0] == 'd');
}
/* closeFold() {{{2 */
/*
* Close fold for current window at line "lnum".
* Repeat "count" times.
*/
void
closeFold(linenr_T lnum, long count)
{
setFoldRepeat(lnum, count, FALSE);
}
/* closeFoldRecurse() {{{2 */
/*
* Close fold for current window at line "lnum" recursively.
*/
void
closeFoldRecurse(linenr_T lnum)
{
(void)setManualFold(lnum, FALSE, TRUE, NULL);
}
/* opFoldRange() {{{2 */
/*
* Open or Close folds for current window in lines "first" to "last".
* Used for "zo", "zO", "zc" and "zC" in Visual mode.
*/
void
opFoldRange(
linenr_T first,
linenr_T last,
int opening, /* TRUE to open, FALSE to close */
int recurse, /* TRUE to do it recursively */
int had_visual) /* TRUE when Visual selection used */
{
int done = DONE_NOTHING; /* avoid error messages */
linenr_T lnum;
linenr_T lnum_next;
for (lnum = first; lnum <= last; lnum = lnum_next + 1)
{
lnum_next = lnum;
/* Opening one level only: next fold to open is after the one going to
* be opened. */
if (opening && !recurse)
(void)hasFolding(lnum, NULL, &lnum_next);
(void)setManualFold(lnum, opening, recurse, &done);
/* Closing one level only: next line to close a fold is after just
* closed fold. */
if (!opening && !recurse)
(void)hasFolding(lnum, NULL, &lnum_next);
}
if (done == DONE_NOTHING)
EMSG(_(e_nofold));
/* Force a redraw to remove the Visual highlighting. */
if (had_visual)
redraw_curbuf_later(INVERTED);
}
/* openFold() {{{2 */
/*
* Open fold for current window at line "lnum".
* Repeat "count" times.
*/
void
openFold(linenr_T lnum, long count)
{
setFoldRepeat(lnum, count, TRUE);
}
/* openFoldRecurse() {{{2 */
/*
* Open fold for current window at line "lnum" recursively.
*/
void
openFoldRecurse(linenr_T lnum)
{
(void)setManualFold(lnum, TRUE, TRUE, NULL);
}
/* foldOpenCursor() {{{2 */
/*
* Open folds until the cursor line is not in a closed fold.
*/
void
foldOpenCursor(void)
{
int done;
checkupdate(curwin);
if (hasAnyFolding(curwin))
for (;;)
{
done = DONE_NOTHING;
(void)setManualFold(curwin->w_cursor.lnum, TRUE, FALSE, &done);
if (!(done & DONE_ACTION))
break;
}
}
/* newFoldLevel() {{{2 */
/*
* Set new foldlevel for current window.
*/
void
newFoldLevel(void)
{
newFoldLevelWin(curwin);
#ifdef FEAT_DIFF
if (foldmethodIsDiff(curwin) && curwin->w_p_scb)
{
win_T *wp;
/*
* Set the same foldlevel in other windows in diff mode.
*/
FOR_ALL_WINDOWS(wp)
{
if (wp != curwin && foldmethodIsDiff(wp) && wp->w_p_scb)
{
wp->w_p_fdl = curwin->w_p_fdl;
newFoldLevelWin(wp);
}
}
}
#endif
}
static void
newFoldLevelWin(win_T *wp)
{
fold_T *fp;
int i;
checkupdate(wp);
if (wp->w_fold_manual)
{
/* Set all flags for the first level of folds to FD_LEVEL. Following
* manual open/close will then change the flags to FD_OPEN or
* FD_CLOSED for those folds that don't use 'foldlevel'. */
fp = (fold_T *)wp->w_folds.ga_data;
for (i = 0; i < wp->w_folds.ga_len; ++i)
fp[i].fd_flags = FD_LEVEL;
wp->w_fold_manual = FALSE;
}
changed_window_setting_win(wp);
}
/* foldCheckClose() {{{2 */
/*
* Apply 'foldlevel' to all folds that don't contain the cursor.
*/
void
foldCheckClose(void)
{
if (*p_fcl != NUL) /* can only be "all" right now */
{
checkupdate(curwin);
if (checkCloseRec(&curwin->w_folds, curwin->w_cursor.lnum,
(int)curwin->w_p_fdl))
changed_window_setting();
}
}
/* checkCloseRec() {{{2 */
static int
checkCloseRec(garray_T *gap, linenr_T lnum, int level)
{
fold_T *fp;
int retval = FALSE;
int i;
fp = (fold_T *)gap->ga_data;
for (i = 0; i < gap->ga_len; ++i)
{
/* Only manually opened folds may need to be closed. */
if (fp[i].fd_flags == FD_OPEN)
{
if (level <= 0 && (lnum < fp[i].fd_top
|| lnum >= fp[i].fd_top + fp[i].fd_len))
{
fp[i].fd_flags = FD_LEVEL;
retval = TRUE;
}
else
retval |= checkCloseRec(&fp[i].fd_nested, lnum - fp[i].fd_top,
level - 1);
}
}
return retval;
}
/* foldCreateAllowed() {{{2 */
/*
* Return TRUE if it's allowed to manually create or delete a fold.
* Give an error message and return FALSE if not.
*/
int
foldManualAllowed(int create)
{
if (foldmethodIsManual(curwin) || foldmethodIsMarker(curwin))
return TRUE;
if (create)
EMSG(_("E350: Cannot create fold with current 'foldmethod'"));
else
EMSG(_("E351: Cannot delete fold with current 'foldmethod'"));
return FALSE;
}
/* foldCreate() {{{2 */
/*
* Create a fold from line "start" to line "end" (inclusive) in the current
* window.
*/
void
foldCreate(linenr_T start, linenr_T end)
{
fold_T *fp;
garray_T *gap;
garray_T fold_ga;
int i, j;
int cont;
int use_level = FALSE;
int closed = FALSE;
int level = 0;
linenr_T start_rel = start;
linenr_T end_rel = end;
if (start > end)
{
/* reverse the range */
end = start_rel;
start = end_rel;
start_rel = start;
end_rel = end;
}
/* When 'foldmethod' is "marker" add markers, which creates the folds. */
if (foldmethodIsMarker(curwin))
{
foldCreateMarkers(start, end);
return;
}
checkupdate(curwin);
/* Find the place to insert the new fold. */
gap = &curwin->w_folds;
for (;;)
{
if (!foldFind(gap, start_rel, &fp))
break;
if (fp->fd_top + fp->fd_len > end_rel)
{
/* New fold is completely inside this fold: Go one level deeper. */
gap = &fp->fd_nested;
start_rel -= fp->fd_top;
end_rel -= fp->fd_top;
if (use_level || fp->fd_flags == FD_LEVEL)
{
use_level = TRUE;
if (level >= curwin->w_p_fdl)
closed = TRUE;
}
else if (fp->fd_flags == FD_CLOSED)
closed = TRUE;
++level;
}
else
{
/* This fold and new fold overlap: Insert here and move some folds
* inside the new fold. */
break;
}
}
i = (int)(fp - (fold_T *)gap->ga_data);
if (ga_grow(gap, 1) == OK)
{
fp = (fold_T *)gap->ga_data + i;
ga_init2(&fold_ga, (int)sizeof(fold_T), 10);
/* Count number of folds that will be contained in the new fold. */
for (cont = 0; i + cont < gap->ga_len; ++cont)
if (fp[cont].fd_top > end_rel)
break;
if (cont > 0 && ga_grow(&fold_ga, cont) == OK)
{
/* If the first fold starts before the new fold, let the new fold
* start there. Otherwise the existing fold would change. */
if (start_rel > fp->fd_top)
start_rel = fp->fd_top;
/* When last contained fold isn't completely contained, adjust end
* of new fold. */
if (end_rel < fp[cont - 1].fd_top + fp[cont - 1].fd_len - 1)
end_rel = fp[cont - 1].fd_top + fp[cont - 1].fd_len - 1;
/* Move contained folds to inside new fold. */
mch_memmove(fold_ga.ga_data, fp, sizeof(fold_T) * cont);
fold_ga.ga_len += cont;
i += cont;
/* Adjust line numbers in contained folds to be relative to the
* new fold. */
for (j = 0; j < cont; ++j)
((fold_T *)fold_ga.ga_data)[j].fd_top -= start_rel;
}
/* Move remaining entries to after the new fold. */
if (i < gap->ga_len)
mch_memmove(fp + 1, (fold_T *)gap->ga_data + i,
sizeof(fold_T) * (gap->ga_len - i));
gap->ga_len = gap->ga_len + 1 - cont;
/* insert new fold */
fp->fd_nested = fold_ga;
fp->fd_top = start_rel;
fp->fd_len = end_rel - start_rel + 1;
/* We want the new fold to be closed. If it would remain open because
* of using 'foldlevel', need to adjust fd_flags of containing folds.
*/
if (use_level && !closed && level < curwin->w_p_fdl)
closeFold(start, 1L);
if (!use_level)
curwin->w_fold_manual = TRUE;
fp->fd_flags = FD_CLOSED;
fp->fd_small = MAYBE;
/* redraw */
changed_window_setting();
}
}
/* deleteFold() {{{2 */
/*
* Delete a fold at line "start" in the current window.
* When "end" is not 0, delete all folds from "start" to "end".
* When "recursive" is TRUE delete recursively.
*/
void
deleteFold(
linenr_T start,
linenr_T end,
int recursive,
int had_visual) /* TRUE when Visual selection used */
{
garray_T *gap;
fold_T *fp;
garray_T *found_ga;
fold_T *found_fp = NULL;
linenr_T found_off = 0;
int use_level;
int maybe_small = FALSE;
int level = 0;
linenr_T lnum = start;
linenr_T lnum_off;
int did_one = FALSE;
linenr_T first_lnum = MAXLNUM;
linenr_T last_lnum = 0;
checkupdate(curwin);
while (lnum <= end)
{
/* Find the deepest fold for "start". */
gap = &curwin->w_folds;
found_ga = NULL;
lnum_off = 0;
use_level = FALSE;
for (;;)
{
if (!foldFind(gap, lnum - lnum_off, &fp))
break;
/* lnum is inside this fold, remember info */
found_ga = gap;
found_fp = fp;
found_off = lnum_off;
/* if "lnum" is folded, don't check nesting */
if (check_closed(curwin, fp, &use_level, level,
&maybe_small, lnum_off))
break;
/* check nested folds */
gap = &fp->fd_nested;
lnum_off += fp->fd_top;
++level;
}
if (found_ga == NULL)
{
++lnum;
}
else
{
lnum = found_fp->fd_top + found_fp->fd_len + found_off;
if (foldmethodIsManual(curwin))
deleteFoldEntry(found_ga,
(int)(found_fp - (fold_T *)found_ga->ga_data), recursive);
else
{
if (first_lnum > found_fp->fd_top + found_off)
first_lnum = found_fp->fd_top + found_off;
if (last_lnum < lnum)
last_lnum = lnum;
if (!did_one)
parseMarker(curwin);
deleteFoldMarkers(found_fp, recursive, found_off);
}
did_one = TRUE;
/* redraw window */
changed_window_setting();
}
}
if (!did_one)
{
EMSG(_(e_nofold));
/* Force a redraw to remove the Visual highlighting. */
if (had_visual)
redraw_curbuf_later(INVERTED);
}
else
/* Deleting markers may make cursor column invalid. */
check_cursor_col();
if (last_lnum > 0)
changed_lines(first_lnum, (colnr_T)0, last_lnum, 0L);
}
/* clearFolding() {{{2 */
/*
* Remove all folding for window "win".
*/
void
clearFolding(win_T *win)
{
deleteFoldRecurse(&win->w_folds);
win->w_foldinvalid = FALSE;
}
/* foldUpdate() {{{2 */
/*
* Update folds for changes in the buffer of a window.
* Note that inserted/deleted lines must have already been taken care of by
* calling foldMarkAdjust().
* The changes in lines from top to bot (inclusive).
*/
void
foldUpdate(win_T *wp, linenr_T top, linenr_T bot)
{
fold_T *fp;
if (disable_fold_update > 0)
return;
/* Mark all folds from top to bot as maybe-small. */
(void)foldFind(&wp->w_folds, top, &fp);
while (fp < (fold_T *)wp->w_folds.ga_data + wp->w_folds.ga_len
&& fp->fd_top < bot)
{
fp->fd_small = MAYBE;
++fp;
}
if (foldmethodIsIndent(wp)
|| foldmethodIsExpr(wp)
|| foldmethodIsMarker(wp)
#ifdef FEAT_DIFF
|| foldmethodIsDiff(wp)
#endif
|| foldmethodIsSyntax(wp))
{
int save_got_int = got_int;
/* reset got_int here, otherwise it won't work */
got_int = FALSE;
foldUpdateIEMS(wp, top, bot);
got_int |= save_got_int;
}
}
/* foldUpdateAll() {{{2 */
/*
* Update all lines in a window for folding.
* Used when a fold setting changes or after reloading the buffer.
* The actual updating is postponed until fold info is used, to avoid doing
* every time a setting is changed or a syntax item is added.
*/
void
foldUpdateAll(win_T *win)
{
win->w_foldinvalid = TRUE;
redraw_win_later(win, NOT_VALID);
}
/* foldMoveTo() {{{2 */
/*
* If "updown" is FALSE: Move to the start or end of the fold.
* If "updown" is TRUE: move to fold at the same level.
* If not moved return FAIL.
*/
int
foldMoveTo(
int updown,
int dir, /* FORWARD or BACKWARD */
long count)
{
long n;
int retval = FAIL;
linenr_T lnum_off;
linenr_T lnum_found;
linenr_T lnum;
int use_level;
int maybe_small;
garray_T *gap;
fold_T *fp;
int level;
int last;
checkupdate(curwin);
/* Repeat "count" times. */
for (n = 0; n < count; ++n)
{
/* Find nested folds. Stop when a fold is closed. The deepest fold
* that moves the cursor is used. */
lnum_off = 0;
gap = &curwin->w_folds;
use_level = FALSE;
maybe_small = FALSE;
lnum_found = curwin->w_cursor.lnum;
level = 0;
last = FALSE;
for (;;)
{
if (!foldFind(gap, curwin->w_cursor.lnum - lnum_off, &fp))
{
if (!updown)
break;
/* When moving up, consider a fold above the cursor; when
* moving down consider a fold below the cursor. */
if (dir == FORWARD)
{
if (fp - (fold_T *)gap->ga_data >= gap->ga_len)
break;
--fp;
}
else
{
if (fp == (fold_T *)gap->ga_data)
break;
}
/* don't look for contained folds, they will always move
* the cursor too far. */
last = TRUE;
}
if (!last)
{
/* Check if this fold is closed. */
if (check_closed(curwin, fp, &use_level, level,
&maybe_small, lnum_off))
last = TRUE;
/* "[z" and "]z" stop at closed fold */
if (last && !updown)
break;
}
if (updown)
{
if (dir == FORWARD)
{
/* to start of next fold if there is one */
if (fp + 1 - (fold_T *)gap->ga_data < gap->ga_len)
{
lnum = fp[1].fd_top + lnum_off;
if (lnum > curwin->w_cursor.lnum)
lnum_found = lnum;
}
}
else
{
/* to end of previous fold if there is one */
if (fp > (fold_T *)gap->ga_data)
{
lnum = fp[-1].fd_top + lnum_off + fp[-1].fd_len - 1;
if (lnum < curwin->w_cursor.lnum)
lnum_found = lnum;
}
}
}
else
{
/* Open fold found, set cursor to its start/end and then check
* nested folds. */
if (dir == FORWARD)
{
lnum = fp->fd_top + lnum_off + fp->fd_len - 1;
if (lnum > curwin->w_cursor.lnum)
lnum_found = lnum;
}
else
{
lnum = fp->fd_top + lnum_off;
if (lnum < curwin->w_cursor.lnum)
lnum_found = lnum;
}
}
if (last)
break;
/* Check nested folds (if any). */
gap = &fp->fd_nested;
lnum_off += fp->fd_top;
++level;
}
if (lnum_found != curwin->w_cursor.lnum)
{
if (retval == FAIL)
setpcmark();
curwin->w_cursor.lnum = lnum_found;
curwin->w_cursor.col = 0;
retval = OK;
}
else
break;
}
return retval;
}
/* foldInitWin() {{{2 */
/*
* Init the fold info in a new window.
*/
void