Blog: Better line wrapping in Vim, 2nd iteration: vim-7.2-breakindent.patch

runtime/doc/eval.txt

@@ -5825 +5825 @@
 keymap                  Compiled with 'keymap' support.
 langmap                 Compiled with 'langmap' support.
 libcall                 Compiled with |libcall()| support.
-linebreak               Compiled with 'linebreak', 'breakat' and 'showbreak'
-                        support.
+linebreak               Compiled with 'linebreak', 'breakat', 'showbreak' and
+                        'breakindent' support.
 lispindent              Compiled with support for lisp indenting.
 listcmds                Compiled with commands for the buffer list |:files|
                         and the argument list |arglist|.

runtime/doc/options.txt

@@ -1160 +1160 @@
         break if 'linebreak' is on.  Only works for ASCII and also for 8-bit
         characters when 'encoding' is an 8-bit encoding.
 
+
+                                                *'breakindent'* *'bri'*
+'breakindent' 'bri'     boolean (default off)
+                        local to window
+                        {not in Vi}
+                        {not available when compiled without the |+linebreak|
+                        feature}
+        Every wrapped line will continue visually indented (same amount of
+        space as the beginning of that line), thus preserving horizontal blocks
+        of text.
+
+                                                *'breakindentmin'* *'brimin'*
+'breakindentmin' 'brimin' number (default 20)
+                        local to window
+                        {not in Vi}
+                        {not available when compiled without the |+linebreak|
+                        feature}
+        Minimum text width that will be kept after applying 'breakindent',
+        even if the resulting text should normally be narrower. This prevents
+        text indented almost to the right window border oocupying lot of
+        vertical space when broken.
+
+                                                *'breakindentshift'* *'brishift'*
+'breakindentshift' 'brishift' number (default 20)
+                        local to window
+                        {not in Vi}
+                        {not available when compiled without the |+linebreak|
+                        feature}
+        After applying 'breakindent', wrapped line beginning will be shift by
+        given number of characters. It permits dynamic French paragraph
+        indentation (negative) or emphasizing the line continuation
+        (positive).
+
                                                 *'browsedir'* *'bsdir'*
 'browsedir' 'bsdir'     string  (default: "last")
                         global
@@ -4263 +4296 @@
                         {not in Vi}
                         {not available when compiled without the  |+linebreak|
                         feature}
-        If on Vim will wrap long lines at a character in 'breakat' rather
+        If on, Vim will wrap long lines at a character in 'breakat' rather
         than at the last character that fits on the screen.  Unlike
         'wrapmargin' and 'textwidth', this does not insert <EOL>s in the file,
-        it only affects the way the file is displayed, not its contents.  The
-        value of 'showbreak' is used to put in front of wrapped lines.
-        This option is not used when the 'wrap' option is off or 'list' is on.
+        it only affects the way the file is displayed, not its contents.
+        If 'breakindent' is set, line is visually indented. Then, the value
+        of 'showbreak' is used to put in front of wrapped lines. This option
+        is not used when the 'wrap' option is off or 'list' is on.
         Note that <Tab> characters after an <EOL> are mostly not displayed
         with the right amount of white space.
 

runtime/optwin.vim

@@ -329 +329 @@
 call append("$", "linebreak\twrap long lines at a character in 'breakat'")
 call append("$", "\t(local to window)")
 call <SID>BinOptionL("lbr")
+call append("$", "breakindent\tpreserve indentation in wrapped text")
+call append("$", "\t(local to window)")
+call <SID>BinOptionL("bri")
+call append("$", "breakindentmin\tminimum text width after indent in 'breakindent'")
+call append("$", "\t(local to window)")
+call <SID>OptionL("brimin")
+call append("$", "breakindentshift\tshift beginning of 'breakindent'ed line by this number of characters (negative left)")
+call append("$", "\t(local to window)")
+call <SID>OptionL("brishift")
 call append("$", "breakat\twhich characters might cause a line break")
 call <SID>OptionG("brk", &brk)
 call append("$", "showbreak\tstring to put before wrapped screen lines")

src/charset.c

@@ -843 +843 @@
  * taking into account the size of a tab
  */
     int
-linetabsize(s)
+linetabsize(s, lnum)
     char_u      *s;
+    linenr_T    lnum;
 {
     colnr_T     col = 0;
 
     while (*s != NUL)
-        col += lbr_chartabsize_adv(&s, col);
+        col += lbr_chartabsize_adv(&s, col, lnum);
     return (int)col;
 }
 
@@ -857 +858 @@
  * Like linetabsize(), but for a given window instead of the current one.
  */
     int
-win_linetabsize(wp, p, len)
+win_linetabsize(wp, p, len, lnum)
     win_T       *wp;
     char_u      *p;
     colnr_T     len;
+    linenr_T    lnum;
 {
     colnr_T     col = 0;
     char_u      *s;
 
     for (s = p; *s != NUL && (len == MAXCOL || s < p + len); mb_ptr_adv(s))
-        col += win_lbr_chartabsize(wp, s, col, NULL);
+        col += win_lbr_chartabsize(wp, s, col, NULL, lnum);
     return (int)col;
 }
 
@@ -995 +997 @@
  * like chartabsize(), but also check for line breaks on the screen
  */
     int
-lbr_chartabsize(s, col)
+lbr_chartabsize(s, col, lnum)
     unsigned char       *s;
     colnr_T             col;
+    linenr_T            lnum;
 {
 #ifdef FEAT_LINEBREAK
-    if (!curwin->w_p_lbr && *p_sbr == NUL)
+    if (!curwin->w_p_lbr && *p_sbr == NUL && !curwin->w_p_bri)
     {
 #endif
 #ifdef FEAT_MBYTE
@@ -1010 +1013 @@
         RET_WIN_BUF_CHARTABSIZE(curwin, curbuf, s, col)
 #ifdef FEAT_LINEBREAK
     }
-    return win_lbr_chartabsize(curwin, s, col, NULL);
+    return win_lbr_chartabsize(curwin, s, col, NULL, lnum);
 #endif
 }
 
@@ -1018 +1021 @@
  * Call lbr_chartabsize() and advance the pointer.
  */
     int
-lbr_chartabsize_adv(s, col)
+lbr_chartabsize_adv(s, col, lnum)
     char_u      **s;
     colnr_T     col;
+    linenr_T    lnum;
 {
     int         retval;
 
-    retval = lbr_chartabsize(*s, col);
+    retval = lbr_chartabsize(*s, col, lnum);
     mb_ptr_adv(*s);
     return retval;
 }
@@ -1035 +1039 @@
  * If "headp" not NULL, set *headp to the size of what we for 'showbreak'
  * string at start of line.  Warning: *headp is only set if it's a non-zero
  * value, init to 0 before calling.
+ *
+ * linenr argument needed if in visual highlighting and breakindent=on, then
+ * the line calculated is not current; if 0, normal functionality is preserved.
  */
     int
-win_lbr_chartabsize(wp, s, col, headp)
+win_lbr_chartabsize(wp, s, col, headp, lnum)
     win_T       *wp;
     char_u      *s;
     colnr_T     col;
     int         *headp UNUSED;
+    linenr_T    lnum;
 {
 #ifdef FEAT_LINEBREAK
     int         c;
@@ -1060 +1068 @@
     int         n;
 
     /*
-     * No 'linebreak' and 'showbreak': return quickly.
+     * No 'linebreak' and 'showbreak' and 'breakindent': return quickly.
      */
-    if (!wp->w_p_lbr && *p_sbr == NUL)
+    if (!wp->w_p_lbr && !wp->w_p_bri && *p_sbr == NUL)
 #endif
     {
 #ifdef FEAT_MBYTE
@@ -1137 +1145 @@
 # endif
 
     /*
-     * May have to add something for 'showbreak' string at start of line
+     * May have to add something for 'breakindent' and/or 'showbreak'
+     * string at start of line.
      * Set *headp to the size of what we add.
      */
     added = 0;
-    if (*p_sbr != NUL && wp->w_p_wrap && col != 0)
+    if ((*p_sbr != NUL || wp->w_p_bri) && wp->w_p_wrap && col != 0)
     {
         numberextra = win_col_off(wp);
         col += numberextra + mb_added;
@@ -1154 +1163 @@
         }
         if (col == 0 || col + size > (colnr_T)W_WIDTH(wp))
         {
-            added = vim_strsize(p_sbr);
+            added = 0;
+            if (*p_sbr != NUL)
+                added += vim_strsize(p_sbr);
+            if (wp->w_p_bri)
+                added += get_breakindent_win(wp,lnum);
+
             if (tab_corr)
                 size += (added / wp->w_buffer->b_p_ts) * wp->w_buffer->b_p_ts;
             else
@@ -1259 +1273 @@
 
     /*
      * This function is used very often, do some speed optimizations.
-     * When 'list', 'linebreak' and 'showbreak' are not set use a simple loop.
+     * When 'list', 'linebreak', 'showbreak' and 'breakindent' are not set
+     * use a simple loop.
      * Also use this when 'list' is set but tabs take their normal size.
      */
     if ((!wp->w_p_list || lcs_tab1 != NUL)
 #ifdef FEAT_LINEBREAK
-            && !wp->w_p_lbr && *p_sbr == NUL
+            && !wp->w_p_lbr && *p_sbr == NUL && !wp->w_p_bri
 #endif
        )
     {
@@ -1326 +1341 @@
         {
             /* A tab gets expanded, depending on the current column */
             head = 0;
-            incr = win_lbr_chartabsize(wp, ptr, vcol, &head);
+            incr = win_lbr_chartabsize(wp, ptr, vcol, &head, pos->lnum);
             /* make sure we don't go past the end of the line */
             if (*ptr == NUL)
             {

src/edit.c

@@ -391 +391 @@
         if (startln)
             Insstart.col = 0;
     }
-    Insstart_textlen = (colnr_T)linetabsize(ml_get_curline());
+    Insstart_textlen = (colnr_T)linetabsize(ml_get_curline(), Insstart.lnum);
     Insstart_blank_vcol = MAXCOL;
     if (!did_ai)
         ai_col = 0;
@@ -1795 +1795 @@
             else
 #endif
                 ++new_cursor_col;
-            vcol += lbr_chartabsize(ptr + new_cursor_col, (colnr_T)vcol);
+            vcol += lbr_chartabsize(ptr + new_cursor_col, (colnr_T)vcol, curwin->w_cursor.lnum);
         }
         vcol = last_vcol;
 
@@ -6368 +6368 @@
             ins_need_undo = FALSE;
         }
         Insstart = curwin->w_cursor;    /* new insertion starts here */
-        Insstart_textlen = (colnr_T)linetabsize(ml_get_curline());
+        Insstart_textlen = (colnr_T)linetabsize(ml_get_curline(),curwin->w_cursor.lnum);
         ai_col = 0;
 #ifdef FEAT_VREPLACE
         if (State & VREPLACE_FLAG)
@@ -6727 +6727 @@
         for (;;)
         {
             coladvance(v - width);
-            /* getviscol() is slow, skip it when 'showbreak' is empty and
-             * there are no multi-byte characters */
-            if ((*p_sbr == NUL
+            /* getviscol() is slow, skip it when 'showbreak' is empty,
+             * 'breakindent' is not set and there are no multi-byte
+             * characters */
+            if ((*p_sbr == NUL && !curwin->w_p_bri
 #  ifdef FEAT_MBYTE
                         && !has_mbyte
 #  endif
@@ -9365 +9366 @@
         getvcol(curwin, &fpos, &vcol, NULL, NULL);
         getvcol(curwin, cursor, &want_vcol, NULL, NULL);
 
-        /* Use as many TABs as possible.  Beware of 'showbreak' and
+        /* Use as many TABs as possible.  Beware of 'breakindent', 'showbreak' and
          * 'linebreak' adding extra virtual columns. */
         while (vim_iswhite(*ptr))
         {
-            i = lbr_chartabsize((char_u *)"\t", vcol);
+            i = lbr_chartabsize((char_u *)"\t", vcol, cursor->lnum);
             if (vcol + i > want_vcol)
                 break;
             if (*ptr != TAB)
@@ -9395 +9396 @@
             /* Skip over the spaces we need. */
             while (vcol < want_vcol && *ptr == ' ')
             {
-                vcol += lbr_chartabsize(ptr, vcol);
+                vcol += lbr_chartabsize(ptr, vcol, cursor->lnum);
                 ++ptr;
                 ++repl_off;
             }
@@ -9643 +9644 @@
     while ((colnr_T)temp < curwin->w_virtcol && *ptr != NUL)
     {
         prev_ptr = ptr;
-        temp += lbr_chartabsize_adv(&ptr, (colnr_T)temp);
+        temp += lbr_chartabsize_adv(&ptr, (colnr_T)temp, lnum);
     }
     if ((colnr_T)temp > curwin->w_virtcol)
         ptr = prev_ptr;

src/ex_cmds.c

@@ -266 +266 @@
         ;
     save = *last;
     *last = NUL;
-    len = linetabsize(line);            /* get line length */
+    len = linetabsize(line, curwin->w_cursor.lnum); /* get line length */
     if (has_tab != NULL)                /* check for embedded TAB */
         *has_tab = (vim_strrchr(first, TAB) != NULL);
     *last = save;

src/getchar.c

@@ -2564 +2564 @@
                                     if (!vim_iswhite(ptr[col]))
                                         curwin->w_wcol = vcol;
                                     vcol += lbr_chartabsize(ptr + col,
-                                                               (colnr_T)vcol);
+                                                               (colnr_T)vcol, curwin->w_cursor.lnum);
 #ifdef FEAT_MBYTE
                                     if (has_mbyte)
                                         col += (*mb_ptr2len)(ptr + col);

src/gui_beval.c

@@ -336 +336 @@
         {
             /* Not past end of the file. */
             lbuf = ml_get_buf(wp->w_buffer, lnum, FALSE);
-            if (col <= win_linetabsize(wp, lbuf, (colnr_T)MAXCOL))
+            if (col <= win_linetabsize(wp, lbuf, (colnr_T)MAXCOL, lnum))
             {
                 /* Not past end of line. */
                 if (getword)

src/misc1.c

@@ -451 +451 @@
     return (int)col;
 }
 
+#ifdef FEAT_LINEBREAK
+/*
+ * Return appropriate space number for breakindent, taking influencing
+ * parameters into account. Window must be specified, since it is not
+ * necessarily always the current one. If lnum==0, current line is calculated,
+ * specified line otherwise.
+ */
+   int
+get_breakindent_win (wp,lnum)
+    win_T*      wp;
+    linenr_T    lnum;
+{
+    int bri;
+    /* window width minus barren space, i.e. what rests for text */
+    const int eff_wwidth = W_WIDTH(wp)
+        - (wp->w_p_nu && !vim_strchr(p_cpo,CPO_NUMCOL)?number_width(wp):0);
+        /* - (*p_sbr == NUL ? 0 : vim_strsize(p_sbr)); */
+
+    bri = get_indent_buf(wp->w_buffer,lnum?lnum:wp->w_cursor.lnum) + wp->w_p_brishift;
+
+    /* if numbering and 'c' in 'cpoptions', cancel it out effectively */
+    /* (this could be replaced by an equivalent call to win_col_off2()) */
+    if (curwin->w_p_nu && vim_strchr(p_cpo, CPO_NUMCOL))
+        bri += number_width(wp);
+
+    /* never indent past left window margin */
+    if (bri < 0)
+        bri = 0;
+    /* always leave at least bri_min characters on the left,
+     * if text width is sufficient */
+    else if (bri > eff_wwidth - wp->w_p_brimin)
+        bri = eff_wwidth - wp->w_p_brimin < 0 ? 0 : eff_wwidth - wp->w_p_brimin;
+
+    return bri;
+}
+
+
+
+#endif
+
 #if defined(FEAT_CINDENT) || defined(FEAT_SMARTINDENT)
 
 static int cin_is_cinword __ARGS((char_u *line));
@@ -1732 +1772 @@
     s = ml_get_buf(wp->w_buffer, lnum, FALSE);
     if (*s == NUL)              /* empty line */
         return 1;
-    col = win_linetabsize(wp, s, (colnr_T)MAXCOL);
+    col = win_linetabsize(wp, s, (colnr_T)MAXCOL, lnum);
 
     /*
      * If list mode is on, then the '$' at the end of the line may take up one
@@ -1788 +1828 @@
     col = 0;
     while (*s != NUL && --column >= 0)
     {
-        col += win_lbr_chartabsize(wp, s, (colnr_T)col, NULL);
+        col += win_lbr_chartabsize(wp, s, (colnr_T)col, NULL, lnum);
         mb_ptr_adv(s);
     }
 
@@ -1800 +1840 @@
      * 'ts') -- webb.
      */
     if (*s == TAB && (State & NORMAL) && (!wp->w_p_list || lcs_tab1))
-        col += win_lbr_chartabsize(wp, s, (colnr_T)col, NULL) - 1;
+        col += win_lbr_chartabsize(wp, s, (colnr_T)col, NULL, lnum) - 1;
 
     /*
      * Add column offset for 'number', 'foldcolumn', etc.
@@ -8228 +8268 @@
                 amount = 0;
                 while (*that && col)
                 {
-                    amount += lbr_chartabsize_adv(&that, (colnr_T)amount);
+                    amount += lbr_chartabsize_adv(&that, (colnr_T)amount, pos->lnum);
                     col--;
                 }
 
@@ -8251 +8291 @@
 
                     while (vim_iswhite(*that))
                     {
-                        amount += lbr_chartabsize(that, (colnr_T)amount);
+                        amount += lbr_chartabsize(that, (colnr_T)amount, pos->lnum);
                         ++that;
                     }
 
@@ -8290 +8330 @@
                                     --parencount;
                                 if (*that == '\\' && *(that+1) != NUL)
                                     amount += lbr_chartabsize_adv(&that,
-                                                             (colnr_T)amount);
+                                                             (colnr_T)amount, pos->lnum);
                                 amount += lbr_chartabsize_adv(&that,
-                                                             (colnr_T)amount);
+                                                             (colnr_T)amount, pos->lnum);
                             }
                         }
                         while (vim_iswhite(*that))
                         {
-                            amount += lbr_chartabsize(that, (colnr_T)amount);
+                            amount += lbr_chartabsize(that, (colnr_T)amount, pos->lnum);
                             that++;
                         }
                         if (!*that || *that == ';')

src/misc2.c

@@ -166 +166 @@
 #ifdef FEAT_VIRTUALEDIT
             if ((addspaces || finetune) && !VIsual_active)
             {
-                curwin->w_curswant = linetabsize(line) + one_more;
+                curwin->w_curswant = linetabsize(line, pos->lnum) + one_more;
                 if (curwin->w_curswant > 0)
                     --curwin->w_curswant;
             }
@@ -184 +184 @@
 # endif
                 && wcol >= (colnr_T)width)
         {
-            csize = linetabsize(line);
+            csize = linetabsize(line, pos->lnum);
             if (csize > 0)
                 csize--;
 
@@ -206 +206 @@
         {
             /* Count a tab for what it's worth (if list mode not on) */
 #ifdef FEAT_LINEBREAK
-            csize = win_lbr_chartabsize(curwin, ptr, col, &head);
+            csize = win_lbr_chartabsize(curwin, ptr, col, &head, pos->lnum);
             mb_ptr_adv(ptr);
 #else
-            csize = lbr_chartabsize_adv(&ptr, col);
+            csize = lbr_chartabsize_adv(&ptr, col, pos->lnum);
 #endif
             col += csize;
         }

src/normal.c

@@ -4327 +4327 @@
     int         dir;
     long        dist;
 {
-    int         linelen = linetabsize(ml_get_curline());
+    int         linelen = linetabsize(ml_get_curline(), curwin->w_cursor.lnum);
     int         retval = OK;
     int         atend = FALSE;
     int         n;
@@ -4400 +4400 @@
                     (void)hasFolding(curwin->w_cursor.lnum,
                                                 &curwin->w_cursor.lnum, NULL);
 #endif
-                linelen = linetabsize(ml_get_curline());
+                linelen = linetabsize(ml_get_curline(), curwin->w_cursor.lnum);
                 if (linelen > width1)
                     curwin->w_curswant += (((linelen - width1 - 1) / width2)
                                                                 + 1) * width2;

src/ops.c

@@ -428 +428 @@
         }
         for ( ; vim_iswhite(*bd.textstart); )
         {
-            incr = lbr_chartabsize_adv(&bd.textstart, (colnr_T)(bd.start_vcol));
+            incr = lbr_chartabsize_adv(&bd.textstart, (colnr_T)(bd.start_vcol), curwin->w_cursor.lnum);
             total += incr;
             bd.start_vcol += incr;
         }
@@ -488 +488 @@
 
         while (vim_iswhite(*non_white))
         {
-            incr = lbr_chartabsize_adv(&non_white, non_white_col);
+            incr = lbr_chartabsize_adv(&non_white, non_white_col, curwin->w_cursor.lnum);
             non_white_col += incr;
         }
 
@@ -513 +513 @@
             verbatim_copy_width -= bd.start_char_vcols;
         while (verbatim_copy_width < destination_col)
         {
-            incr = lbr_chartabsize(verbatim_copy_end, verbatim_copy_width);
+            incr = lbr_chartabsize(verbatim_copy_end, verbatim_copy_width, curwin->w_cursor.lnum);
             if (verbatim_copy_width + incr > destination_col)
                 break;
             verbatim_copy_width += incr;
@@ -3519 +3519 @@
             for (ptr = oldp; vcol < col && *ptr; )
             {
                 /* Count a tab for what it's worth (if list mode not on) */
-                incr = lbr_chartabsize_adv(&ptr, (colnr_T)vcol);
+                incr = lbr_chartabsize_adv(&ptr, (colnr_T)vcol, lnum);
                 vcol += incr;
             }
             bd.textcol = (colnr_T)(ptr - oldp);
@@ -3553 +3553 @@
             /* calculate number of spaces required to fill right side of block*/
             spaces = y_width + 1;
             for (j = 0; j < yanklen; j++)
-                spaces -= lbr_chartabsize(&y_array[i][j], 0);
+                spaces -= lbr_chartabsize(&y_array[i][j], 0, lnum);
             if (spaces < 0)
                 spaces = 0;
 
@@ -4906 +4906 @@
     while (bdp->start_vcol < oap->start_vcol && *pstart)
     {
         /* Count a tab for what it's worth (if list mode not on) */
-        incr = lbr_chartabsize(pstart, (colnr_T)bdp->start_vcol);
+        incr = lbr_chartabsize(pstart, (colnr_T)bdp->start_vcol, lnum);
         bdp->start_vcol += incr;
 #ifdef FEAT_VISUALEXTRA
         if (vim_iswhite(*pstart))
@@ -4975 +4975 @@
             {
                 /* Count a tab for what it's worth (if list mode not on) */
                 prev_pend = pend;
-                incr = lbr_chartabsize_adv(&pend, (colnr_T)bdp->end_vcol);
+                incr = lbr_chartabsize_adv(&pend, (colnr_T)bdp->end_vcol, lnum);
                 bdp->end_vcol += incr;
             }
             if (bdp->end_vcol <= oap->end_vcol
@@ -6465 +6465 @@
             validate_virtcol();
             col_print(buf1, sizeof(buf1), (int)curwin->w_cursor.col + 1,
                     (int)curwin->w_virtcol + 1);
-            col_print(buf2, sizeof(buf2), (int)STRLEN(p), linetabsize(p));
+            col_print(buf2, sizeof(buf2), (int)STRLEN(p), linetabsize(p, curwin->w_cursor.lnum));
 
             if (char_count_cursor == byte_count_cursor
                     && char_count == byte_count)

src/option.c

@@ -186 +186 @@
 #ifdef FEAT_ARABIC
 # define PV_ARAB        OPT_WIN(WV_ARAB)
 #endif
+#ifdef FEAT_LINEBREAK
+# define PV_BRI         OPT_WIN(WV_BRI)
+# define PV_BRIMIN      OPT_WIN(WV_BRIMIN)
+# define PV_BRISHIFT    OPT_WIN(WV_BRISHIFT)
+#endif
 #ifdef FEAT_DIFF
 # define PV_DIFF        OPT_WIN(WV_DIFF)
 #endif
@@ -634 +639 @@
                             {(char_u *)0L, (char_u *)0L}
 #endif
                             SCRIPTID_INIT},
+    {"breakindent",   "bri",  P_BOOL|P_VI_DEF|P_VIM|P_RWIN,
+#ifdef FEAT_LINEBREAK
+                            (char_u *)VAR_WIN, PV_BRI,
+#else
+                            (char_u *)NULL, PV_NONE,
+#endif
+                            {(char_u *)FALSE, (char_u *)0L}},
+    {"breakindentmin", "brimin", P_NUM|P_VI_DEF|P_VIM|P_RWIN,
+#ifdef FEAT_LINEBREAK
+                            (char_u *)VAR_WIN, PV_BRIMIN,
+#else
+                            (char_u *)NULL, PV_NONE,
+#endif
+                            {(char_u *)20L, (char_u *)20L}},
+    {"breakindentshift", "brishift", P_NUM|P_VI_DEF|P_VIM|P_RWIN,
+#ifdef FEAT_LINEBREAK
+                            (char_u *)VAR_WIN, PV_BRISHIFT,
+#else
+                            (char_u *)NULL, PV_NONE,
+#endif
+                            {(char_u *)0L, (char_u *)0L}},
     {"browsedir",   "bsdir",P_STRING|P_VI_DEF,
 #ifdef FEAT_BROWSE
                             (char_u *)&p_bsdir, PV_NONE,
@@ -8015 +8041 @@
         }
         curwin->w_nrwidth_line_count = 0;
     }
+
+    /* 'breakindentmin' must be positive */
+    else if (pp == &curwin->w_p_brimin)
+    {
+        if (curwin->w_p_brimin < 1)
+        {
+            errmsg = e_positive;
+            curwin->w_p_brimin = 1;
+        }
+    }
 #endif
 
     /*
@@ -9218 +9254 @@
         case PV_WRAP:   return (char_u *)&(curwin->w_p_wrap);
 #ifdef FEAT_LINEBREAK
         case PV_LBR:    return (char_u *)&(curwin->w_p_lbr);
+        case PV_BRI:    return (char_u *)&(curwin->w_p_bri);
+        case PV_BRIMIN: return (char_u *)&(curwin->w_p_brimin);
+        case PV_BRISHIFT: return (char_u *)&(curwin->w_p_brishift);
 #endif
 #ifdef FEAT_SCROLLBIND
         case PV_SCBIND: return (char_u *)&(curwin->w_p_scb);
@@ -9396 +9435 @@
     to->wo_wrap = from->wo_wrap;
 #ifdef FEAT_LINEBREAK
     to->wo_lbr = from->wo_lbr;
+    to->wo_bri = from->wo_bri;
+    to->wo_brimin = from->wo_brimin;
 #endif
 #ifdef FEAT_SCROLLBIND
     to->wo_scb = from->wo_scb;

src/option.h

@@ -1018 +1018 @@
 #ifdef FEAT_ARABIC
     , WV_ARAB
 #endif
+#ifdef FEAT_LINEBREAK
+    , WV_BRI
+    , WV_BRIMIN
+    , WV_BRISHIFT
+#endif
 #ifdef FEAT_DIFF
     , WV_DIFF
 #endif

src/proto/charset.pro

@@ -14 +14 @@
 int vim_strsize __ARGS((char_u *s));
 int vim_strnsize __ARGS((char_u *s, int len));
 int chartabsize __ARGS((char_u *p, colnr_T col));
-int linetabsize __ARGS((char_u *s));
-int win_linetabsize __ARGS((win_T *wp, char_u *p, colnr_T len));
+int linetabsize __ARGS((char_u *s, linenr_T lnum));
+int win_linetabsize __ARGS((win_T *wp, char_u *p, colnr_T len, linenr_T lnum));
 int vim_isIDc __ARGS((int c));
 int vim_iswordc __ARGS((int c));
 int vim_iswordp __ARGS((char_u *p));
@@ -24 +24 @@
 int vim_isfilec_or_wc __ARGS((int c));
 int vim_isprintc __ARGS((int c));
 int vim_isprintc_strict __ARGS((int c));
-int lbr_chartabsize __ARGS((unsigned char *s, colnr_T col));
-int lbr_chartabsize_adv __ARGS((char_u **s, colnr_T col));
-int win_lbr_chartabsize __ARGS((win_T *wp, char_u *s, colnr_T col, int *headp));
+int lbr_chartabsize __ARGS((unsigned char *s, colnr_T col, linenr_T lnum));
+int lbr_chartabsize_adv __ARGS((char_u **s, colnr_T col, linenr_T lnum));
+int win_lbr_chartabsize __ARGS((win_T *wp, char_u *s, colnr_T col, int *headp, linenr_T lnum));
 int in_win_border __ARGS((win_T *wp, colnr_T vcol));
 void getvcol __ARGS((win_T *wp, pos_T *pos, colnr_T *start, colnr_T *cursor, colnr_T *end));
 colnr_T getvcol_nolist __ARGS((pos_T *posp));

src/proto/misc1.pro

@@ -5 +5 @@
 int get_indent_str __ARGS((char_u *ptr, int ts));
 int set_indent __ARGS((int size, int flags));
 int get_number_indent __ARGS((linenr_T lnum));
+int get_breakindent_win __ARGS((win_T *wp, linenr_T lnum));
 int open_line __ARGS((int dir, int flags, int old_indent));
 int get_leader_len __ARGS((char_u *line, char_u **flags, int backward));
 int plines __ARGS((linenr_T lnum));

src/regexp.c

@@ -3994 +3994 @@
                     if (top.col == MAXCOL || bot.col == MAXCOL)
                         end = MAXCOL;
                     cols = win_linetabsize(wp,
-                                      regline, (colnr_T)(reginput - regline));
+                                      regline, (colnr_T)(reginput - regline), reglnum + reg_firstlnum);
                     if (cols < start || cols > end - (*p_sel == 'e'))
                         status = RA_NOMATCH;
                 }
@@ -4018 +4018 @@
           case RE_VCOL:
             if (!re_num_cmp((long_u)win_linetabsize(
                             reg_win == NULL ? curwin : reg_win,
-                            regline, (colnr_T)(reginput - regline)) + 1, scan))
+                            regline, (colnr_T)(reginput - regline), reglnum + reg_firstlnum ) + 1, scan))
                 status = RA_NOMATCH;
             break;
 

src/screen.c

@@ -2698 +2698 @@
 # define WL_SIGN        WL_FOLD         /* column for signs */
 #endif
 #define WL_NR           WL_SIGN + 1     /* line number */
+#ifdef FEAT_LINEBREAK
+# define WL_BRI         WL_NR + 1       /* 'breakindent' */
+#else
+# define WL_BRI         WL_NR
+#endif
 #if defined(FEAT_LINEBREAK) || defined(FEAT_DIFF)
-# define WL_SBR         WL_NR + 1       /* 'showbreak' or 'diff' */
+# define WL_SBR         WL_BRI + 1      /* 'showbreak' or 'diff' */
 #else
-# define WL_SBR         WL_NR
+# define WL_SBR         WL_BRI
 #endif
 #define WL_LINE         WL_SBR + 1      /* text in the line */
     int         draw_state = WL_START;  /* what to draw next */
@@ -3010 +3015 @@
 #endif
         while (vcol < v && *ptr != NUL)
         {
-            c = win_lbr_chartabsize(wp, ptr, (colnr_T)vcol, NULL);
+            c = win_lbr_chartabsize(wp, ptr, (colnr_T)vcol, NULL, lnum);
             vcol += c;
 #ifdef FEAT_MBYTE
             prev_ptr = ptr;
@@ -3368 +3373 @@
                 }
             }
 
+#ifdef FEAT_LINEBREAK
+            /* draw 'breakindent': indent wrapped text accordingly */
+            if (draw_state == WL_BRI -1 && n_extra == 0){
+                draw_state = WL_BRI;
+# ifdef FEAT_DIFF
+                /* FIXME: handle (filler_todo > 0): or modify showbreak so that ---- vim/lines are shorter by the amount needed? */
+# endif
+                if (wp->w_p_bri && row != startrow){ /* FIXME: what is startrow? Don't we need it as well?? */
+                    p_extra = NUL;
+                    c_extra = ' ';
+                    n_extra = get_breakindent_win(wp,lnum);
+                    char_attr = 0; /* was: hl_attr(HLF_AT); */
+                    /* FIXME: why do we need to adjust vcol if showbreak does not?? */
+                    vcol += n_extra;
+                    /* FIXME: is this relevant here? copied shamelessly from showbreak */
+                    /* Correct end of highlighted area for 'breakindent',
+                     * required when 'linebreak' is also set. */
+                    if (tocol == vcol)
+                        tocol += n_extra;
+                }
+            }
+#endif
+
+
 #if defined(FEAT_LINEBREAK) || defined(FEAT_DIFF)
             if (draw_state == WL_SBR - 1 && n_extra == 0)
             {
@@ -4065 +4094 @@
 # ifdef FEAT_MBYTE
                                 has_mbyte ? mb_l :
 # endif
-                                1), (colnr_T)vcol, NULL) - 1;
+                                1), (colnr_T)vcol, NULL, lnum) - 1;
                     c_extra = ' ';
                     if (vim_iswhite(c))
                         c = ' ';

src/structs.h

@@ -133 +133 @@
     int         wo_arab;
 # define w_p_arab w_onebuf_opt.wo_arab  /* 'arabic' */
 #endif
+#ifdef FEAT_LINEBREAK
+    int         wo_bri;
+# define w_p_bri w_onebuf_opt.wo_bri    /* 'breakindent' */
+    long        wo_brimin;
+# define w_p_brimin w_onebuf_opt.wo_brimin /* 'breakindentmin' */
+    long        wo_brishift;
+# define w_p_brishift w_onebuf_opt.wo_brishift /* 'breakindentshift' */
+#endif
 #ifdef FEAT_DIFF
     int         wo_diff;
 # define w_p_diff w_onebuf_opt.wo_diff  /* 'diff' */

src/ui.c

@@ -3062 +3062 @@
     start = ptr = ml_get_buf(wp->w_buffer, lnum, FALSE);
     while (count <= vcol && *ptr != NUL)
     {
-        count += win_lbr_chartabsize(wp, ptr, count, NULL);
+        count += win_lbr_chartabsize(wp, ptr, count, NULL, lnum);
         mb_ptr_adv(ptr);
     }
     return (int)(ptr - start);