/* vi:set ts=8 sts=4 sw=4 noet:
*
* 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.
*/
/*
* textobject.c: functions for text objects
*/
#include "vim.h"
static int cls(void);
static int skip_chars(int, int);
/*
* Find the start of the next sentence, searching in the direction specified
* by the "dir" argument. The cursor is positioned on the start of the next
* sentence when found. If the next sentence is found, return OK. Return FAIL
* otherwise. See ":h sentence" for the precise definition of a "sentence"
* text object.
*/
int
findsent(int dir, long count)
{
pos_T pos, tpos;
pos_T prev_pos;
int c;
int (*func)(pos_T *);
int startlnum;
int noskip = FALSE; // do not skip blanks
int cpo_J;
int found_dot;
pos = curwin->w_cursor;
if (dir == FORWARD)
func = incl;
else
func = decl;
while (count--)
{
prev_pos = pos;
/*
* if on an empty line, skip up to a non-empty line
*/
if (gchar_pos(&pos) == NUL)
{
do
if ((*func)(&pos) == -1)
break;
while (gchar_pos(&pos) == NUL);
if (dir == FORWARD)
goto found;
}
/*
* if on the start of a paragraph or a section and searching forward,
* go to the next line
*/
else if (dir == FORWARD && pos.col == 0 &&
startPS(pos.lnum, NUL, FALSE))
{
if (pos.lnum == curbuf->b_ml.ml_line_count)
return FAIL;
++pos.lnum;
goto found;
}
else if (dir == BACKWARD)
decl(&pos);
// go back to the previous non-white non-punctuation character
found_dot = FALSE;
while (c = gchar_pos(&pos), VIM_ISWHITE(c)
|| vim_strchr((char_u *)".!?)]\"'", c) != NULL)
{
tpos = pos;
if (decl(&tpos) == -1 || (LINEEMPTY(tpos.lnum) && dir == FORWARD))
break;
if (found_dot)
break;
if (vim_strchr((char_u *) ".!?", c) != NULL)
found_dot = TRUE;
if (vim_strchr((char_u *) ")]\"'", c) != NULL
&& vim_strchr((char_u *) ".!?)]\"'", gchar_pos(&tpos)) == NULL)
break;
decl(&pos);
}
// remember the line where the search started
startlnum = pos.lnum;
cpo_J = vim_strchr(p_cpo, CPO_ENDOFSENT) != NULL;
for (;;) // find end of sentence
{
c = gchar_pos(&pos);
if (c == NUL || (pos.col == 0 && startPS(pos.lnum, NUL, FALSE)))
{
if (dir == BACKWARD && pos.lnum != startlnum)
++pos.lnum;
break;
}
if (c == '.' || c == '!' || c == '?')
{
tpos = pos;
do
if ((c = inc(&tpos)) == -1)
break;
while (vim_strchr((char_u *)")]\"'", c = gchar_pos(&tpos))
!= NULL);
if (c == -1 || (!cpo_J && (c == ' ' || c == '\t')) || c == NUL
|| (cpo_J && (c == ' ' && inc(&tpos) >= 0
&& gchar_pos(&tpos) == ' ')))
{
pos = tpos;
if (gchar_pos(&pos) == NUL) // skip NUL at EOL
inc(&pos);
break;
}
}
if ((*func)(&pos) == -1)
{
if (count)
return FAIL;
noskip = TRUE;
break;
}
}
found:
// skip white space
while (!noskip && ((c = gchar_pos(&pos)) == ' ' || c == '\t'))
if (incl(&pos) == -1)
break;
if (EQUAL_POS(prev_pos, pos))
{
// didn't actually move, advance one character and try again
if ((*func)(&pos) == -1)
{
if (count)
return FAIL;
break;
}
++count;
}
}
setpcmark();
curwin->w_cursor = pos;
return OK;
}
/*
* Find the next paragraph or section in direction 'dir'.
* Paragraphs are currently supposed to be separated by empty lines.
* If 'what' is NUL we go to the next paragraph.
* If 'what' is '{' or '}' we go to the next section.
* If 'both' is TRUE also stop at '}'.
* Return TRUE if the next paragraph or section was found.
*/
int
findpar(
int *pincl, // Return: TRUE if last char is to be included
int dir,
long count,
int what,
int both)
{
linenr_T curr;
int did_skip; // TRUE after separating lines have been skipped
int first; // TRUE on first line
int posix = (vim_strchr(p_cpo, CPO_PARA) != NULL);
#ifdef FEAT_FOLDING
linenr_T fold_first; // first line of a closed fold
linenr_T fold_last; // last line of a closed fold
int fold_skipped; // TRUE if a closed fold was skipped this
// iteration
#endif
curr = curwin->w_cursor.lnum;
while (count--)
{
did_skip = FALSE;
for (first = TRUE; ; first = FALSE)
{
if (*ml_get(curr) != NUL)
did_skip = TRUE;
#ifdef FEAT_FOLDING
// skip folded lines
fold_skipped = FALSE;
if (first && hasFolding(curr, &fold_first, &fold_last))
{
curr = ((dir > 0) ? fold_last : fold_first) + dir;
fold_skipped = TRUE;
}
#endif
// POSIX has its own ideas of what a paragraph boundary is and it
// doesn't match historical Vi: It also stops at a "{" in the
// first column and at an empty line.
if (!first && did_skip && (startPS(curr, what, both)
|| (posix && what == NUL && *ml_get(curr) == '{')))
break;
#ifdef FEAT_FOLDING
if (fold_skipped)
curr -= dir;
#endif
if ((curr += dir) < 1 || curr > curbuf->b_ml.ml_line_count)
{
if (count)
return FALSE;
curr -= dir;
break;
}
}
}
setpcmark();
if (both && *ml_get(curr) == '}') // include line with '}'
++curr;
curwin->w_cursor.lnum = curr;
if (curr == curbuf->b_ml.ml_line_count && what != '}')
{
char_u *line = ml_get(curr);
// Put the cursor on the last character in the last line and make the
// motion inclusive.
if ((curwin->w_cursor.col = (colnr_T)STRLEN(line)) != 0)
{
--curwin->w_cursor.col;
curwin->w_cursor.col -=
(*mb_head_off)(line, line + curwin->w_cursor.col);
*pincl = TRUE;
}
}
else
curwin->w_cursor.col = 0;
return TRUE;
}
/*
* check if the string 's' is a nroff macro that is in option 'opt'
*/
static int
inmacro(char_u *opt, char_u *s)
{
char_u *macro;
for (macro = opt; macro[0]; ++macro)
{
// Accept two characters in the option being equal to two characters
// in the line. A space in the option matches with a space in the
// line or the line having ended.
if ( (macro[0] == s[0]
|| (macro[0] == ' '
&& (s[0] == NUL || s[0] == ' ')))
&& (macro[1] == s[1]
|| ((macro[1] == NUL || macro[1] == ' ')
&& (s[0] == NUL || s[1] == NUL || s[1] == ' '))))
break;
++macro;
if (macro[0] == NUL)
break;
}
return (macro[0] != NUL);
}
/*
* startPS: return TRUE if line 'lnum' is the start of a section or paragraph.
* If 'para' is '{' or '}' only check for sections.
* If 'both' is TRUE also stop at '}'
*/
int
startPS(linenr_T lnum, int para, int both)
{
char_u *s;
s = ml_get(lnum);
if (*s == para || *s == '\f' || (both && *s == '}'))
return TRUE;
if (*s == '.' && (inmacro(p_sections, s + 1) ||
(!para && inmacro(p_para, s + 1))))
return TRUE;
return FALSE;
}
/*
* The following routines do the word searches performed by the 'w', 'W',
* 'b', 'B', 'e', and 'E' commands.
*/
/*
* To perform these searches, characters are placed into one of three
* classes, and transitions between classes determine word boundaries.
*
* The classes are:
*
* 0 - white space
* 1 - punctuation
* 2 or higher - keyword characters (letters, digits and underscore)
*/
static int cls_bigword; // TRUE for "W", "B" or "E"
/*
* cls() - returns the class of character at curwin->w_cursor
*
* If a 'W', 'B', or 'E' motion is being done (cls_bigword == TRUE), chars
* from class 2 and higher are reported as class 1 since only white space
* boundaries are of interest.
*/
static int
cls(void)
{
int c;
c = gchar_cursor();
if (c == ' ' || c == '\t' || c == NUL)
return 0;
if (enc_dbcs != 0 && c > 0xFF)
{
// If cls_bigword, report multi-byte chars as class 1.
if (enc_dbcs == DBCS_KOR && cls_bigword)
return 1;
// process code leading/trailing bytes
return dbcs_class(((unsigned)c >> 8), (c & 0xFF));
}
if (enc_utf8)
{
c = utf_class(c);
if (c != 0 && cls_bigword)
return 1;
return c;
}
// If cls_bigword is TRUE, report all non-blanks as class 1.
if (cls_bigword)
return 1;
if (vim_iswordc(c))
return 2;
return 1;
}
/*
* fwd_word(count, type, eol) - move forward one word
*
* Returns FAIL if the cursor was already at the end of the file.
* If eol is TRUE, last word stops at end of line (for operators).
*/
int
fwd_word(
long count,
int bigword, // "W", "E" or "B"
int eol)
{
int sclass; // starting class
int i;
int last_line;
curwin->w_cursor.coladd = 0;
cls_bigword = bigword;
while (--count >= 0)
{
#ifdef FEAT_FOLDING
// When inside a range of folded lines, move to the last char of the
// last line.
if (hasFolding(curwin->w_cursor.lnum, NULL, &curwin->w_cursor.lnum))
coladvance((colnr_T)MAXCOL);
#endif
sclass = cls();
/*
* We always move at least one character, unless on the last
* character in the buffer.
*/
last_line = (curwin->w_cursor.lnum == curbuf->b_ml.ml_line_count);
i = inc_cursor();
if (i == -1 || (i >= 1 && last_line)) // started at last char in file
return FAIL;
if (i >= 1 && eol && count == 0) // started at last char in line
return OK;
/*
* Go one char past end of current word (if any)
*/
if (sclass != 0)
while (cls() == sclass)
{
i = inc_cursor();
if (i == -1 || (i >= 1 && eol && count == 0))
return OK;
}
/*
* go to next non-white
*/
while (cls() == 0)
{
/*
* We'll stop if we land on a blank line
*/
if (curwin->w_cursor.col == 0 && *ml_get_curline() == NUL)
break;
i = inc_cursor();
if (i == -1 || (i >= 1 && eol && count == 0))
return OK;
}
}
return OK;
}
/*
* bck_word() - move backward 'count' words
*
* If stop is TRUE and we are already on the start of a word, move one less.
*
* Returns FAIL if top of the file was reached.
*/
int
bck_word(long count, int bigword, int stop)
{
int sclass; // starting class
curwin->w_cursor.coladd = 0;
cls_bigword = bigword;
while (--count >= 0)
{
#ifdef FEAT_FOLDING
// When inside a range of folded lines, move to the first char of the
// first line.
if (hasFolding(curwin->w_cursor.lnum, &curwin->w_cursor.lnum, NULL))
curwin->w_cursor.col = 0;
#endif
sclass = cls();
if (dec_cursor() == -1) // started at start of file
return FAIL;
if (!stop || sclass == cls() || sclass == 0)
{
/*
* Skip white space before the word.
* Stop on an empty line.
*/
while (cls() == 0)
{
if (curwin->w_cursor.col == 0
&& LINEEMPTY(curwin->w_cursor.lnum))
goto finished;
if (dec_cursor() == -1) // hit start of file, stop here
return OK;
}
/*
* Move backward to start of this word.
*/
if (skip_chars(cls(), BACKWARD))
return OK;
}
inc_cursor(); // overshot - forward one
finished:
stop = FALSE;
}
adjust_skipcol();
return OK;
}
/*
* end_word() - move to the end of the word
*
* There is an apparent bug in the 'e' motion of the real vi. At least on the
* System V Release 3 version for the 80386. Unlike 'b' and 'w', the 'e'
* motion crosses blank lines. When the real vi crosses a blank line in an
* 'e' motion, the cursor is placed on the FIRST character of the next
* non-blank line. The 'E' command, however, works correctly. Since this
* appears to be a bug, I have not duplicated it here.
*
* Returns FAIL if end of the file was reached.
*
* If stop is TRUE and we are already on the end of a word, move one less.
* If empty is TRUE stop on an empty line.
*/
int
end_word(
long count,
int bigword,
int stop,
int empty)
{
int sclass; // starting class
curwin->w_cursor.coladd = 0;
cls_bigword = bigword;
while (--count >= 0)
{
#ifdef FEAT_FOLDING
// When inside a range of folded lines, move to the last char of the
// last line.
if (hasFolding(curwin->w_cursor.lnum, NULL, &curwin->w_cursor.lnum))
coladvance((colnr_T)MAXCOL);
#endif
sclass = cls();
if (inc_cursor() == -1)
return FAIL;
/*
* If we're in the middle of a word, we just have to move to the end
* of it.
*/
if (cls() == sclass && sclass != 0)
{
/*
* Move forward to end of the current word
*/
if (skip_chars(sclass, FORWARD))
return FAIL;
}
else if (!stop || sclass == 0)
{
/*
* We were at the end of a word. Go to the end of the next word.
* First skip white space, if 'empty' is TRUE, stop at empty line.
*/
while (cls() == 0)
{
if (empty && curwin->w_cursor.col == 0
&& LINEEMPTY(curwin->w_cursor.lnum))
goto finished;
if (inc_cursor() == -1) // hit end of file, stop here
return FAIL;
}
/*
* Move forward to the end of this word.
*/
if (skip_chars(cls(), FORWARD))
return FAIL;
}
dec_cursor(); // overshot - one char backward
finished:
stop = FALSE; // we move only one word less
}
return OK;
}
/*
* Move back to the end of the word.
*
* Returns FAIL if start of the file was reached.
*/
int
bckend_word(
long count,
int bigword, // TRUE for "B"
int eol) // TRUE: stop at end of line.
{
int sclass; // starting class
int i;
curwin->w_cursor.coladd = 0;
cls_bigword = bigword;
while (--count >= 0)
{
sclass = cls();
if ((i = dec_cursor()) == -1)
return FAIL;
if (eol && i == 1)
return OK;
/*
* Move backward to before the start of this word.
*/
if (sclass != 0)
{
while (cls() == sclass)
if ((i = dec_cursor()) == -1 || (eol && i == 1))
return OK;
}
/*
* Move backward to end of the previous word
*/
while (cls() == 0)
{
if (curwin->w_cursor.col == 0 && LINEEMPTY(curwin->w_cursor.lnum))
break;
if ((i = dec_cursor()) == -1 || (eol && i == 1))
return OK;
}
}
adjust_skipcol();
return OK;
}
/*
* Skip a row of characters of the same class.
* Return TRUE when end-of-file reached, FALSE otherwise.
*/
static int
skip_chars(int cclass, int dir)
{
while (cls() == cclass)
if ((dir == FORWARD ? inc_cursor() : dec_cursor()) == -1)
return TRUE;
return FALSE;
}
/*
* Go back to the start of the word or the start of white space
*/
static void
back_in_line(void)
{
int sclass; // starting class
sclass = cls();
for (;;)
{
if (curwin->w_cursor.col == 0) // stop at start of line
break;
dec_cursor();
if (cls() != sclass) // stop at start of word
{
inc_cursor();
break;
}
}
}
static void
find_first_blank(pos_T *posp)
{
int c;
while (decl(posp) != -1)
{
c = gchar_pos(posp);
if (!VIM_ISWHITE(c))
{
incl(posp);
break;
}
}
}
/*
* Skip count/2 sentences and count/2 separating white spaces.
*/
static void
findsent_forward(
long count,
int at_start_sent) // cursor is at start of sentence
{
while (count--)
{
findsent(FORWARD, 1L);
if (at_start_sent)
find_first_blank(&curwin->w_cursor);
if (count == 0 || at_start_sent)
decl(&curwin->w_cursor);
at_start_sent = !at_start_sent;
}
}
/*
* Find word under cursor, cursor at end.
* Used while an operator is pending, and in Visual mode.
*/
int
current_word(
oparg_T *oap,
long count,
int include, // TRUE: include word and white space
int bigword) // FALSE == word, TRUE == WORD
{
pos_T start_pos;
pos_T pos;
int inclusive = TRUE;
int include_white = FALSE;
cls_bigword = bigword;
CLEAR_POS(&start_pos);
// Correct cursor when 'selection' is exclusive
if (VIsual_active && *p_sel == 'e' && LT_POS(VIsual, curwin->w_cursor))
dec_cursor();
/*
* When Visual mode is not active, or when the VIsual area is only one
* character, select the word and/or white space under the cursor.
*/
if (!VIsual_active || EQUAL_POS(curwin->w_cursor, VIsual))
{
/*
* Go to start of current word or white space.
*/
back_in_line();
start_pos = curwin->w_cursor;
/*
* If the start is on white space, and white space should be included
* (" word"), or start is not on white space, and white space should
* not be included ("word"), find end of word.
*/
if ((cls() == 0) == include)
{
if (end_word(1L, bigword, TRUE, TRUE) == FAIL)
return FAIL;
}
else
{
/*
* If the start is not on white space, and white space should be
* included ("word "), or start is on white space and white
* space should not be included (" "), find start of word.
* If we end up in the first column of the next line (single char
* word) back up to end of the line.
*/
fwd_word(1L, bigword, TRUE);
if (curwin->w_cursor.col == 0)
decl(&curwin->w_cursor);
else
oneleft();
if (include)
include_white = TRUE;
}
if (VIsual_active)
{
// should do something when inclusive == FALSE !
VIsual = start_pos;
redraw_curbuf_later(UPD_INVERTED); // update the inversion
}
else
{
oap->start = start_pos;
oap->motion_type = MCHAR;
}
--count;
}
/*
* When count is still > 0, extend with more objects.
*/
while (count > 0)
{
inclusive = TRUE;
if (VIsual_active && LT_POS(curwin->w_cursor, VIsual))
{
/*
* In Visual mode, with cursor at start: move cursor back.
*/
if (decl(&curwin->w_cursor) == -1)
return FAIL;
if (include != (cls() != 0))
{
if (bck_word(1L, bigword, TRUE) == FAIL)
return FAIL;
}
else
{
if (bckend_word(1L, bigword, TRUE) == FAIL)
return FAIL;
(void)incl(&curwin->w_cursor);
}
}
else
{
/*
* Move cursor forward one word and/or white area.
*/
if (incl(&curwin->w_cursor) == -1)
return FAIL;
if (include != (cls() == 0))
{
if (fwd_word(1L, bigword, TRUE) == FAIL && count > 1)
return FAIL;
/*
* If end is just past a new-line, we don't want to include
* the first character on the line.
* Put cursor on last char of white.
*/
if (oneleft() == FAIL)
inclusive = FALSE;
}
else
{
if (end_word(1L, bigword, TRUE, TRUE) == FAIL)
return FAIL;
}
}
--count;
}
if (include_white && (cls() != 0
|| (curwin->w_cursor.col == 0 && !inclusive)))
{
/*
* If we don't include white space at the end, move the start
* to include some white space there. This makes "daw" work
* better on the last word in a sentence (and "2daw" on last-but-one
* word). Also when "2daw" deletes "word." at the end of the line
* (cursor is at start of next line).
* But don't delete white space at start of line (indent).
*/
pos = curwin->w_cursor; // save cursor position
curwin->w_cursor = start_pos;
if (oneleft() == OK)
{
back_in_line();
if (cls() == 0 && curwin->w_cursor.col > 0)
{
if (VIsual_active)
VIsual = curwin->w_cursor;
else
oap->start = curwin->w_cursor;
}
}
curwin->w_cursor = pos; // put cursor back at end
}
if (VIsual_active)
{
if (*p_sel == 'e' && inclusive && LTOREQ_POS(VIsual, curwin->w_cursor))
inc_cursor();
if (VIsual_mode == 'V')
{
VIsual_mode = 'v';
redraw_cmdline = TRUE; // show mode later
}
}
else
oap->inclusive = inclusive;
return OK;
}
/*
* Find sentence(s) under the cursor, cursor at end.
* When Visual active, extend it by one or more sentences.
*/
int
current_sent(oparg_T *oap, long count, int include)
{
pos_T start_pos;
pos_T pos;
int start_blank;
int c;
int at_start_sent;
long ncount;
start_pos = curwin->w_cursor;
pos = start_pos;
findsent(FORWARD, 1L); // Find start of next sentence.
/*
* When the Visual area is bigger than one character: Extend it.
*/
if (VIsual_active && !EQUAL_POS(start_pos, VIsual))
{
extend:
if (LT_POS(start_pos, VIsual))
{
/*
* Cursor at start of Visual area.
* Find out where we are:
* - in the white space before a sentence
* - in a sentence or just after it
* - at the start of a sentence
*/
at_start_sent = TRUE;
decl(&pos);
while (LT_POS(pos, curwin->w_cursor))
{
c = gchar_pos(&pos);
if (!VIM_ISWHITE(c))
{
at_start_sent = FALSE;
break;
}
incl(&pos);
}
if (!at_start_sent)
{
findsent(BACKWARD, 1L);
if (EQUAL_POS(curwin->w_cursor, start_pos))
at_start_sent = TRUE; // exactly at start of sentence
else
// inside a sentence, go to its end (start of next)
findsent(FORWARD, 1L);
}
if (include) // "as" gets twice as much as "is"
count *= 2;
while (count--)
{
if (at_start_sent)
find_first_blank(&curwin->w_cursor);
c = gchar_cursor();
if (!at_start_sent || (!include && !VIM_ISWHITE(c)))
findsent(BACKWARD, 1L);
at_start_sent = !at_start_sent;
}
}
else
{
/*
* Cursor at end of Visual area.
* Find out where we are:
* - just before a sentence
* - just before or in the white space before a sentence
* - in a sentence
*/
incl(&pos);
at_start_sent = TRUE;
// not just before a sentence
if (!EQUAL_POS(pos, curwin->w_cursor))
{
at_start_sent = FALSE;
while (LT_POS(pos, curwin->w_cursor))
{
c = gchar_pos(&pos);
if (!VIM_ISWHITE(c))
{
at_start_sent = TRUE;
break;
}
incl(&pos);
}
if (at_start_sent) // in the sentence
findsent(BACKWARD, 1L);
else // in/before white before a sentence
curwin->w_cursor = start_pos;
}
if (include) // "as" gets twice as much as "is"
count *= 2;
findsent_forward(count, at_start_sent);
if (*p_sel == 'e')
++curwin->w_cursor.col;
}
return OK;
}
/*
* If the cursor started on a blank, check if it is just before the start
* of the next sentence.
*/
while (c = gchar_pos(&pos), VIM_ISWHITE(c)) // VIM_ISWHITE() is a macro
incl(&pos);
if (EQUAL_POS(pos, curwin->w_cursor))
{
start_blank = TRUE;
find_first_blank(&start_pos); // go back to first blank
}
else
{
start_blank = FALSE;
findsent(BACKWARD, 1L);
start_pos = curwin->w_cursor;
}
if (include)
ncount = count * 2;
else
{
ncount = count;
if (start_blank)
--ncount;
}
if (ncount > 0)
findsent_forward(ncount, TRUE);
else
decl(&curwin->w_cursor);
if (include)
{
/*
* If the blank in front of the sentence is included, exclude the
* blanks at the end of the sentence, go back to the first blank.
* If there are no trailing blanks, try to include leading blanks.
*/
if (start_blank)
{
find_first_blank(&curwin->w_cursor);
c = gchar_pos(&curwin->w_cursor); // VIM_ISWHITE() is a macro
if (VIM_ISWHITE(c))
decl(&curwin->w_cursor);
}
else if (c = gchar_cursor(), !VIM_ISWHITE(c))
find_first_blank(&start_pos);
}
if (VIsual_active)
{
// Avoid getting stuck with "is" on a single space before a sentence.
if (EQUAL_POS(start_pos, curwin->w_cursor))
goto extend;
if (*p_sel == 'e')
++curwin->w_cursor.col;
VIsual = start_pos;
VIsual_mode = 'v';
redraw_cmdline = TRUE; // show mode later
redraw_curbuf_later(UPD_INVERTED); // update the inversion
}
else
{
// include a newline after the sentence, if there is one
if (incl(&curwin->w_cursor) == -1)
oap->inclusive = TRUE;
else
oap->inclusive = FALSE;
oap->start = start_pos;
oap->motion_type = MCHAR;
}
return OK;
}
/*
* Find block under the cursor, cursor at end.
* "what" and "other" are two matching parenthesis/brace/etc.
*/
int
current_block(
oparg_T *oap,
long count,
int include, // TRUE == include white space
int what, // '(', '{', etc.
int other) // ')', '}', etc.
{
pos_T old_pos;
pos_T *pos = NULL;
pos_T start_pos;
pos_T *end_pos;
pos_T old_start, old_end;
char_u *save_cpo;
int sol = FALSE; // '{' at start of line
old_pos = curwin->w_cursor;
old_end = curwin->w_cursor; // remember where we started
old_start = old_end;
/*
* If we start on '(', '{', ')', '}', etc., use the whole block inclusive.
*/
if (!VIsual_active || EQUAL_POS(VIsual, curwin->w_cursor))
{
setpcmark();
if (what == '{') // ignore indent
while (inindent(1))
if (inc_cursor() != 0)
break;
if (gchar_cursor() == what)
// cursor on '(' or '{', move cursor just after it
++curwin->w_cursor.col;
}
else if (LT_POS(VIsual, curwin->w_cursor))
{
old_start = VIsual;
curwin->w_cursor = VIsual; // cursor at low end of Visual
}
else
old_end = VIsual;
/*
* Search backwards for unclosed '(', '{', etc..
* Put this position in start_pos.
* Ignore quotes here. Keep the "M" flag in 'cpo', as that is what the
* user wants.
*/
save_cpo = p_cpo;
p_cpo = (char_u *)(vim_strchr(p_cpo, CPO_MATCHBSL) != NULL ? "%M" : "%");
if ((pos = findmatch(NULL, what)) != NULL)
{
while (count-- > 0)
{
if ((pos = findmatch(NULL, what)) == NULL)
break;
curwin->w_cursor = *pos;
start_pos = *pos; // the findmatch for end_pos will overwrite *pos
}
}
else
{
while (count-- > 0)
{
if ((pos = findmatchlimit(NULL, what, FM_FORWARD, 0)) == NULL)
break;
curwin->w_cursor = *pos;
start_pos = *pos; // the findmatch for end_pos will overwrite *pos
}
}
p_cpo = save_cpo;
/*
* Search for matching ')', '}', etc.
* Put this position in curwin->w_cursor.
*/
if (pos == NULL || (end_pos = findmatch(NULL, other)) == NULL)
{
curwin->w_cursor = old_pos;
return FAIL;
}
curwin->w_cursor = *end_pos;
/*
* Try to exclude the '(', '{', ')', '}', etc. when "include" is FALSE.
* If the ending '}', ')' or ']' is only preceded by indent, skip that
* indent. But only if the resulting area is not smaller than what we
* started with.
*/
while (!include)
{
incl(&start_pos);
sol = (curwin->w_cursor.col == 0);
decl(&curwin->w_cursor);
while (inindent(1))
{
sol = TRUE;
if (decl(&curwin->w_cursor) != 0)
break;
}
/*
* In Visual mode, when the resulting area is not bigger than what we
* started with, extend it to the next block, and then exclude again.
* Don't try to expand the area if the area is empty.
*/
if (!LT_POS(start_pos, old_start) && !LT_POS(old_end, curwin->w_cursor)
&& !EQUAL_POS(start_pos, curwin->w_cursor)
&& VIsual_active)
{
curwin->w_cursor = old_start;
decl(&curwin->w_cursor);
if ((pos = findmatch(NULL, what)) == NULL)
{
curwin->w_cursor = old_pos;
return FAIL;
}
start_pos = *pos;
curwin->w_cursor = *pos;
if ((end_pos = findmatch(NULL, other)) == NULL)
{
curwin->w_cursor = old_pos;
return FAIL;
}
curwin->w_cursor = *end_pos;
}
else
break;
}
if (VIsual_active)
{
if (*p_sel == 'e')
inc(&curwin->w_cursor);
if (sol && gchar_cursor() != NUL)
inc(&curwin->w_cursor); // include the line break
VIsual = start_pos;
VIsual_mode = 'v';
redraw_curbuf_later(UPD_INVERTED); // update the inversion
showmode();
}
else
{
oap->start = start_pos;
oap->motion_type = MCHAR;
oap->inclusive = FALSE;
if (sol)
incl(&curwin->w_cursor);
else if (LTOREQ_POS(start_pos, curwin->w_cursor))
// Include the character under the cursor.
oap->inclusive = TRUE;
else
// End is before the start (no text in between <>, [], etc.): don't
// operate on any text.
curwin->w_cursor = start_pos;
}
return OK;
}
#if defined(FEAT_EVAL) || defined(PROTO)
/*
* Return TRUE if the cursor is on a "" tag. Ignore "".
* When "end_tag" is TRUE return TRUE if the cursor is on "".
*/
static int
in_html_tag(
int end_tag)
{
char_u *line = ml_get_curline();
char_u *p;
int c;
int lc = NUL;
pos_T pos;
if (enc_dbcs)
{
char_u *lp = NULL;
// We search forward until the cursor, because searching backwards is
// very slow for DBCS encodings.
for (p = line; p < line + curwin->w_cursor.col; MB_PTR_ADV(p))
if (*p == '>' || *p == '<')
{
lc = *p;
lp = p;
}
if (*p != '<') // check for '<' under cursor
{
if (lc != '<')
return FALSE;
p = lp;
}
}
else
{
for (p = line + curwin->w_cursor.col; p > line; )
{
if (*p == '<') // find '<' under/before cursor
break;
MB_PTR_BACK(line, p);
if (*p == '>') // find '>' before cursor
break;
}
if (*p != '<')
return FALSE;
}
pos.lnum = curwin->w_cursor.lnum;
pos.col = (colnr_T)(p - line);
MB_PTR_ADV(p);
if (end_tag)
// check that there is a '/' after the '<'
return *p == '/';
// check that there is no '/' after the '<'
if (*p == '/')
return FALSE;
// check that the matching '>' is not preceded by '/'
for (;;)
{
if (inc(&pos) < 0)
return FALSE;
c = *ml_get_pos(&pos);
if (c == '>')
break;
lc = c;
}
return lc != '/';
}
/*
* Find tag block under the cursor, cursor at end.
*/
int
current_tagblock(
oparg_T *oap,
long count_arg,
int include) // TRUE == include white space
{
long count = count_arg;
long n;
pos_T old_pos;
pos_T start_pos;
pos_T end_pos;
pos_T old_start, old_end;
char_u *spat, *epat;
char_u *p;
char_u *cp;
int len;
int r;
int do_include = include;
int save_p_ws = p_ws;
int retval = FAIL;
int is_inclusive = TRUE;
p_ws = FALSE;
old_pos = curwin->w_cursor;
old_end = curwin->w_cursor; // remember where we started
old_start = old_end;
if (!VIsual_active || *p_sel == 'e')
decl(&old_end); // old_end is inclusive
/*
* If we start on "" select that block.
*/
if (!VIsual_active || EQUAL_POS(VIsual, curwin->w_cursor))
{
setpcmark();
// ignore indent
while (inindent(1))
if (inc_cursor() != 0)
break;
if (in_html_tag(FALSE))
{
// cursor on start tag, move to its '>'
while (*ml_get_cursor() != '>')
if (inc_cursor() < 0)
break;
}
else if (in_html_tag(TRUE))
{
// cursor on end tag, move to just before it
while (*ml_get_cursor() != '<')
if (dec_cursor() < 0)
break;
dec_cursor();
old_end = curwin->w_cursor;
}
}
else if (LT_POS(VIsual, curwin->w_cursor))
{
old_start = VIsual;
curwin->w_cursor = VIsual; // cursor at low end of Visual
}
else
old_end = VIsual;
again:
/*
* Search backwards for unclosed "".
* Put this position in start_pos.
*/
for (n = 0; n < count; ++n)
{
if (do_searchpair((char_u *)"<[^ \t>/!]\\+\\%(\\_s\\_[^>]\\{-}[^/]>\\|$\\|\\_s\\=>\\)",
(char_u *)"",
(char_u *)"[^>]*>", BACKWARD, NULL, 0,
NULL, (linenr_T)0, 0L) <= 0)
{
curwin->w_cursor = old_pos;
goto theend;
}
}
start_pos = curwin->w_cursor;
/*
* Search for matching "". First isolate the "aaa".
*/
inc_cursor();
p = ml_get_cursor();
for (cp = p; *cp != NUL && *cp != '>' && !VIM_ISWHITE(*cp); MB_PTR_ADV(cp))
;
len = (int)(cp - p);
if (len == 0)
{
curwin->w_cursor = old_pos;
goto theend;
}
spat = alloc(len + 39);
epat = alloc(len + 9);
if (spat == NULL || epat == NULL)
{
vim_free(spat);
vim_free(epat);
curwin->w_cursor = old_pos;
goto theend;
}
sprintf((char *)spat, "<%.*s\\>\\%%(\\_s\\_[^>]\\{-}\\_[^/]>\\|\\_s\\?>\\)\\c", len, p);
sprintf((char *)epat, "%.*s>\\c", len, p);
r = do_searchpair(spat, (char_u *)"", epat, FORWARD, NULL,
0, NULL, (linenr_T)0, 0L);
vim_free(spat);
vim_free(epat);
if (r < 1 || LT_POS(curwin->w_cursor, old_end))
{
// Can't find other end or it's before the previous end. Could be a
// HTML tag that doesn't have a matching end. Search backwards for
// another starting tag.
count = 1;
curwin->w_cursor = start_pos;
goto again;
}
if (do_include)
{
// Include up to the '>'.
while (*ml_get_cursor() != '>')
if (inc_cursor() < 0)
break;
}
else
{
char_u *c = ml_get_cursor();
// Exclude the '<' of the end tag.
// If the closing tag is on new line, do not decrement cursor, but
// make operation exclusive, so that the linefeed will be selected
if (*c == '<' && !VIsual_active && curwin->w_cursor.col == 0)
// do not decrement cursor
is_inclusive = FALSE;
else if (*c == '<')
dec_cursor();
}
end_pos = curwin->w_cursor;
if (!do_include)
{
// Exclude the start tag.
curwin->w_cursor = start_pos;
while (inc_cursor() >= 0)
if (*ml_get_cursor() == '>')
{
inc_cursor();
start_pos = curwin->w_cursor;
break;
}
curwin->w_cursor = end_pos;
// If we are in Visual mode and now have the same text as before set
// "do_include" and try again.
if (VIsual_active && EQUAL_POS(start_pos, old_start)
&& EQUAL_POS(end_pos, old_end))
{
do_include = TRUE;
curwin->w_cursor = old_start;
count = count_arg;
goto again;
}
}
if (VIsual_active)
{
// If the end is before the start there is no text between tags, select
// the char under the cursor.
if (LT_POS(end_pos, start_pos))
curwin->w_cursor = start_pos;
else if (*p_sel == 'e')
inc_cursor();
VIsual = start_pos;
VIsual_mode = 'v';
redraw_curbuf_later(UPD_INVERTED); // update the inversion
showmode();
}
else
{
oap->start = start_pos;
oap->motion_type = MCHAR;
if (LT_POS(end_pos, start_pos))
{
// End is before the start: there is no text between tags; operate
// on an empty area.
curwin->w_cursor = start_pos;
oap->inclusive = FALSE;
}
else
oap->inclusive = is_inclusive;
}
retval = OK;
theend:
p_ws = save_p_ws;
return retval;
}
#endif
int
current_par(
oparg_T *oap,
long count,
int include, // TRUE == include white space
int type) // 'p' for paragraph, 'S' for section
{
linenr_T start_lnum;
linenr_T end_lnum;
int white_in_front;
int dir;
int start_is_white;
int prev_start_is_white;
int retval = OK;
int do_white = FALSE;
int t;
int i;
if (type == 'S') // not implemented yet
return FAIL;
start_lnum = curwin->w_cursor.lnum;
/*
* When visual area is more than one line: extend it.
*/
if (VIsual_active && start_lnum != VIsual.lnum)
{
extend:
if (start_lnum < VIsual.lnum)
dir = BACKWARD;
else
dir = FORWARD;
for (i = count; --i >= 0; )
{
if (start_lnum ==
(dir == BACKWARD ? 1 : curbuf->b_ml.ml_line_count))
{
retval = FAIL;
break;
}
prev_start_is_white = -1;
for (t = 0; t < 2; ++t)
{
start_lnum += dir;
start_is_white = linewhite(start_lnum);
if (prev_start_is_white == start_is_white)
{
start_lnum -= dir;
break;
}
for (;;)
{
if (start_lnum == (dir == BACKWARD
? 1 : curbuf->b_ml.ml_line_count))
break;
if (start_is_white != linewhite(start_lnum + dir)
|| (!start_is_white
&& startPS(start_lnum + (dir > 0
? 1 : 0), 0, 0)))
break;
start_lnum += dir;
}
if (!include)
break;
if (start_lnum == (dir == BACKWARD
? 1 : curbuf->b_ml.ml_line_count))
break;
prev_start_is_white = start_is_white;
}
}
curwin->w_cursor.lnum = start_lnum;
curwin->w_cursor.col = 0;
return retval;
}
/*
* First move back to the start_lnum of the paragraph or white lines
*/
white_in_front = linewhite(start_lnum);
while (start_lnum > 1)
{
if (white_in_front) // stop at first white line
{
if (!linewhite(start_lnum - 1))
break;
}
else // stop at first non-white line of start of paragraph
{
if (linewhite(start_lnum - 1) || startPS(start_lnum, 0, 0))
break;
}
--start_lnum;
}
/*
* Move past the end of any white lines.
*/
end_lnum = start_lnum;
while (end_lnum <= curbuf->b_ml.ml_line_count && linewhite(end_lnum))
++end_lnum;
--end_lnum;
i = count;
if (!include && white_in_front)
--i;
while (i--)
{
if (end_lnum == curbuf->b_ml.ml_line_count)
return FAIL;
if (!include)
do_white = linewhite(end_lnum + 1);
if (include || !do_white)
{
++end_lnum;
/*
* skip to end of paragraph
*/
while (end_lnum < curbuf->b_ml.ml_line_count
&& !linewhite(end_lnum + 1)
&& !startPS(end_lnum + 1, 0, 0))
++end_lnum;
}
if (i == 0 && white_in_front && include)
break;
/*
* skip to end of white lines after paragraph
*/
if (include || do_white)
while (end_lnum < curbuf->b_ml.ml_line_count
&& linewhite(end_lnum + 1))
++end_lnum;
}
/*
* If there are no empty lines at the end, try to find some empty lines at
* the start (unless that has been done already).
*/
if (!white_in_front && !linewhite(end_lnum) && include)
while (start_lnum > 1 && linewhite(start_lnum - 1))
--start_lnum;
if (VIsual_active)
{
// Problem: when doing "Vipipip" nothing happens in a single white
// line, we get stuck there. Trap this here.
if (VIsual_mode == 'V' && start_lnum == curwin->w_cursor.lnum)
goto extend;
if (VIsual.lnum != start_lnum)
{
VIsual.lnum = start_lnum;
VIsual.col = 0;
}
VIsual_mode = 'V';
redraw_curbuf_later(UPD_INVERTED); // update the inversion
showmode();
}
else
{
oap->start.lnum = start_lnum;
oap->start.col = 0;
oap->motion_type = MLINE;
}
curwin->w_cursor.lnum = end_lnum;
curwin->w_cursor.col = 0;
return OK;
}
/*
* Search quote char from string line[col].
* Quote character escaped by one of the characters in "escape" is not counted
* as a quote.
* Returns column number of "quotechar" or -1 when not found.
*/
static int
find_next_quote(
char_u *line,
int col,
int quotechar,
char_u *escape) // escape characters, can be NULL
{
int c;
for (;;)
{
c = line[col];
if (c == NUL)
return -1;
else if (escape != NULL && vim_strchr(escape, c))
{
++col;
if (line[col] == NUL)
return -1;
}
else if (c == quotechar)
break;
if (has_mbyte)
col += (*mb_ptr2len)(line + col);
else
++col;
}
return col;
}
/*
* Search backwards in "line" from column "col_start" to find "quotechar".
* Quote character escaped by one of the characters in "escape" is not counted
* as a quote.
* Return the found column or zero.
*/
static int
find_prev_quote(
char_u *line,
int col_start,
int quotechar,
char_u *escape) // escape characters, can be NULL
{
int n;
while (col_start > 0)
{
--col_start;
col_start -= (*mb_head_off)(line, line + col_start);
n = 0;
if (escape != NULL)
while (col_start - n > 0 && vim_strchr(escape,
line[col_start - n - 1]) != NULL)
++n;
if (n & 1)
col_start -= n; // uneven number of escape chars, skip it
else if (line[col_start] == quotechar)
break;
}
return col_start;
}
/*
* Find quote under the cursor, cursor at end.
* Returns TRUE if found, else FALSE.
*/
int
current_quote(
oparg_T *oap,
long count,
int include, // TRUE == include quote char
int quotechar) // Quote character
{
char_u *line = ml_get_curline();
int col_end;
int col_start = curwin->w_cursor.col;
int inclusive = FALSE;
int vis_empty = TRUE; // Visual selection <= 1 char
int vis_bef_curs = FALSE; // Visual starts before cursor
int did_exclusive_adj = FALSE; // adjusted pos for 'selection'
int inside_quotes = FALSE; // Looks like "i'" done before
int selected_quote = FALSE; // Has quote inside selection
int i;
int restore_vis_bef = FALSE; // restore VIsual on abort
// When 'selection' is "exclusive" move the cursor to where it would be
// with 'selection' "inclusive", so that the logic is the same for both.
// The cursor then is moved forward after adjusting the area.
if (VIsual_active)
{
// this only works within one line
if (VIsual.lnum != curwin->w_cursor.lnum)
return FALSE;
vis_bef_curs = LT_POS(VIsual, curwin->w_cursor);
vis_empty = EQUAL_POS(VIsual, curwin->w_cursor);
if (*p_sel == 'e')
{
if (vis_bef_curs)
{
dec_cursor();
did_exclusive_adj = TRUE;
}
else if (!vis_empty)
{
dec(&VIsual);
did_exclusive_adj = TRUE;
}
vis_empty = EQUAL_POS(VIsual, curwin->w_cursor);
if (!vis_bef_curs && !vis_empty)
{
// VIsual needs to be the start of Visual selection.
pos_T t = curwin->w_cursor;
curwin->w_cursor = VIsual;
VIsual = t;
vis_bef_curs = TRUE;
restore_vis_bef = TRUE;
}
}
}
if (!vis_empty)
{
// Check if the existing selection exactly spans the text inside
// quotes.
if (vis_bef_curs)
{
inside_quotes = VIsual.col > 0
&& line[VIsual.col - 1] == quotechar
&& line[curwin->w_cursor.col] != NUL
&& line[curwin->w_cursor.col + 1] == quotechar;
i = VIsual.col;
col_end = curwin->w_cursor.col;
}
else
{
inside_quotes = curwin->w_cursor.col > 0
&& line[curwin->w_cursor.col - 1] == quotechar
&& line[VIsual.col] != NUL
&& line[VIsual.col + 1] == quotechar;
i = curwin->w_cursor.col;
col_end = VIsual.col;
}
// Find out if we have a quote in the selection.
while (i <= col_end)
{
// check for going over the end of the line, which can happen if
// the line was changed after the Visual area was selected.
if (line[i] == NUL)
break;
if (line[i++] == quotechar)
{
selected_quote = TRUE;
break;
}
}
}
if (!vis_empty && line[col_start] == quotechar)
{
// Already selecting something and on a quote character. Find the
// next quoted string.
if (vis_bef_curs)
{
// Assume we are on a closing quote: move to after the next
// opening quote.
col_start = find_next_quote(line, col_start + 1, quotechar, NULL);
if (col_start < 0)
goto abort_search;
col_end = find_next_quote(line, col_start + 1, quotechar,
curbuf->b_p_qe);
if (col_end < 0)
{
// We were on a starting quote perhaps?
col_end = col_start;
col_start = curwin->w_cursor.col;
}
}
else
{
col_end = find_prev_quote(line, col_start, quotechar, NULL);
if (line[col_end] != quotechar)
goto abort_search;
col_start = find_prev_quote(line, col_end, quotechar,
curbuf->b_p_qe);
if (line[col_start] != quotechar)
{
// We were on an ending quote perhaps?
col_start = col_end;
col_end = curwin->w_cursor.col;
}
}
}
else
if (line[col_start] == quotechar || !vis_empty)
{
int first_col = col_start;
if (!vis_empty)
{
if (vis_bef_curs)
first_col = find_next_quote(line, col_start, quotechar, NULL);
else
first_col = find_prev_quote(line, col_start, quotechar, NULL);
}
// The cursor is on a quote, we don't know if it's the opening or
// closing quote. Search from the start of the line to find out.
// Also do this when there is a Visual area, a' may leave the cursor
// in between two strings.
col_start = 0;
for (;;)
{
// Find open quote character.
col_start = find_next_quote(line, col_start, quotechar, NULL);
if (col_start < 0 || col_start > first_col)
goto abort_search;
// Find close quote character.
col_end = find_next_quote(line, col_start + 1, quotechar,
curbuf->b_p_qe);
if (col_end < 0)
goto abort_search;
// If is cursor between start and end quote character, it is
// target text object.
if (col_start <= first_col && first_col <= col_end)
break;
col_start = col_end + 1;
}
}
else
{
// Search backward for a starting quote.
col_start = find_prev_quote(line, col_start, quotechar, curbuf->b_p_qe);
if (line[col_start] != quotechar)
{
// No quote before the cursor, look after the cursor.
col_start = find_next_quote(line, col_start, quotechar, NULL);
if (col_start < 0)
goto abort_search;
}
// Find close quote character.
col_end = find_next_quote(line, col_start + 1, quotechar,
curbuf->b_p_qe);
if (col_end < 0)
goto abort_search;
}
// When "include" is TRUE, include spaces after closing quote or before
// the starting quote.
if (include)
{
if (VIM_ISWHITE(line[col_end + 1]))
while (VIM_ISWHITE(line[col_end + 1]))
++col_end;
else
while (col_start > 0 && VIM_ISWHITE(line[col_start - 1]))
--col_start;
}
// Set start position. After vi" another i" must include the ".
// For v2i" include the quotes.
if (!include && count < 2 && (vis_empty || !inside_quotes))
++col_start;
curwin->w_cursor.col = col_start;
if (VIsual_active)
{
// Set the start of the Visual area when the Visual area was empty, we
// were just inside quotes or the Visual area didn't start at a quote
// and didn't include a quote.
if (vis_empty
|| (vis_bef_curs
&& !selected_quote
&& (inside_quotes
|| (line[VIsual.col] != quotechar
&& (VIsual.col == 0
|| line[VIsual.col - 1] != quotechar)))))
{
VIsual = curwin->w_cursor;
redraw_curbuf_later(UPD_INVERTED);
}
}
else
{
oap->start = curwin->w_cursor;
oap->motion_type = MCHAR;
}
// Set end position.
curwin->w_cursor.col = col_end;
if ((include || count > 1 // After vi" another i" must include the ".
|| (!vis_empty && inside_quotes)
) && inc_cursor() == 2)
inclusive = TRUE;
if (VIsual_active)
{
if (vis_empty || vis_bef_curs)
{
// decrement cursor when 'selection' is not exclusive
if (*p_sel != 'e')
dec_cursor();
}
else
{
// Cursor is at start of Visual area. Set the end of the Visual
// area when it was just inside quotes or it didn't end at a
// quote.
if (inside_quotes
|| (!selected_quote
&& line[VIsual.col] != quotechar
&& (line[VIsual.col] == NUL
|| line[VIsual.col + 1] != quotechar)))
{
dec_cursor();
VIsual = curwin->w_cursor;
}
curwin->w_cursor.col = col_start;
}
if (VIsual_mode == 'V')
{
VIsual_mode = 'v';
redraw_cmdline = TRUE; // show mode later
}
}
else
{
// Set inclusive and other oap's flags.
oap->inclusive = inclusive;
}
return OK;
abort_search:
if (VIsual_active && *p_sel == 'e')
{
if (did_exclusive_adj)
inc_cursor();
if (restore_vis_bef)
{
pos_T t = curwin->w_cursor;
curwin->w_cursor = VIsual;
VIsual = t;
}
}
return FALSE;
}