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+To: vim_dev@googlegroups.com
+Subject: Patch 8.1.07
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 8.1.0759
+Problem: Showing two characters for tab is limited.
+Solution: Allow for a third character for "tab:" in 'listchars'. (Nathaniel
+ Braun, Ken Takata, closes #3810)
+Files: runtime/doc/options.txt, src/globals.h, src/message.c,
+ src/option.c, src/screen.c, src/testdir/test_listchars.vim
+
+
+*** ../vim-8.1.0758/runtime/doc/options.txt 2019-01-08 22:02:36.040297337 +0100
+--- runtime/doc/options.txt 2019-01-16 22:32:15.368530721 +0100
+***************
+*** 5025,5035 ****
+ omitted, there is no extra character at the end of the
+ line.
+ *lcs-tab*
+! tab:xy Two characters to be used to show a tab. The first
+! char is used once. The second char is repeated to
+! fill the space that the tab normally occupies.
+! "tab:>-" will show a tab that takes four spaces as
+! ">---". When omitted, a tab is show as ^I.
+ *lcs-space*
+ space:c Character to show for a space. When omitted, spaces
+ are left blank.
+--- 5066,5091 ----
+ omitted, there is no extra character at the end of the
+ line.
+ *lcs-tab*
+! tab:xy[z] Two or three characters to be used to show a tab.
+! The third character is optional.
+!
+! tab:xy The 'x' is always used, then 'y' as many times as will
+! fit. Thus "tab:>-" displays:
+! >
+! >-
+! >--
+! etc.
+!
+! tab:xyz The 'z' is always used, then 'x' is prepended, and
+! then 'y' is used as many times as will fit. Thus
+! "tab:<->" displays:
+! >
+! <>
+! <->
+! <-->
+! etc.
+!
+! When "tab:" is omitted, a tab is shown as ^I.
+ *lcs-space*
+ space:c Character to show for a space. When omitted, spaces
+ are left blank.
+*** ../vim-8.1.0758/src/globals.h 2019-01-13 23:38:33.391773303 +0100
+--- src/globals.h 2019-01-16 22:25:51.783632939 +0100
+***************
+*** 1163,1168 ****
+--- 1163,1169 ----
+ EXTERN int lcs_space INIT(= NUL);
+ EXTERN int lcs_tab1 INIT(= NUL);
+ EXTERN int lcs_tab2 INIT(= NUL);
++ EXTERN int lcs_tab3 INIT(= NUL);
+ EXTERN int lcs_trail INIT(= NUL);
+ #ifdef FEAT_CONCEAL
+ EXTERN int lcs_conceal INIT(= ' ');
+*** ../vim-8.1.0758/src/message.c 2019-01-13 23:38:33.399773248 +0100
+--- src/message.c 2019-01-16 22:25:51.783632939 +0100
+***************
+*** 1771,1776 ****
+--- 1771,1777 ----
+ int col = 0;
+ int n_extra = 0;
+ int c_extra = 0;
++ int c_final = 0;
+ char_u *p_extra = NULL; /* init to make SASC shut up */
+ int n;
+ int attr = 0;
+***************
+*** 1801,1807 ****
+ if (n_extra > 0)
+ {
+ --n_extra;
+! if (c_extra)
+ c = c_extra;
+ else
+ c = *p_extra++;
+--- 1802,1810 ----
+ if (n_extra > 0)
+ {
+ --n_extra;
+! if (n_extra == 0 && c_final)
+! c = c_final;
+! else if (c_extra)
+ c = c_extra;
+ else
+ c = *p_extra++;
+***************
+*** 1844,1854 ****
+ {
+ c = ' ';
+ c_extra = ' ';
+ }
+ else
+ {
+! c = lcs_tab1;
+ c_extra = lcs_tab2;
+ attr = HL_ATTR(HLF_8);
+ }
+ }
+--- 1847,1859 ----
+ {
+ c = ' ';
+ c_extra = ' ';
++ c_final = NUL;
+ }
+ else
+ {
+! c = (n_extra == 0 && lcs_tab3) ? lcs_tab3 : lcs_tab1;
+ c_extra = lcs_tab2;
++ c_final = lcs_tab3;
+ attr = HL_ATTR(HLF_8);
+ }
+ }
+***************
+*** 1861,1866 ****
+--- 1866,1872 ----
+ {
+ p_extra = (char_u *)"";
+ c_extra = NUL;
++ c_final = NUL;
+ n_extra = 1;
+ c = lcs_eol;
+ attr = HL_ATTR(HLF_AT);
+***************
+*** 1871,1876 ****
+--- 1877,1883 ----
+ n_extra = n - 1;
+ p_extra = transchar_byte(c);
+ c_extra = NUL;
++ c_final = NUL;
+ c = *p_extra++;
+ /* Use special coloring to be able to distinguish <hex> from
+ * the same in plain text. */
+*** ../vim-8.1.0758/src/option.c 2019-01-15 21:12:53.602254042 +0100
+--- src/option.c 2019-01-16 22:25:51.783632939 +0100
+***************
+*** 7949,7955 ****
+ {
+ int round, i, len, entries;
+ char_u *p, *s;
+! int c1, c2 = 0;
+ struct charstab
+ {
+ int *cp;
+--- 7949,7955 ----
+ {
+ int round, i, len, entries;
+ char_u *p, *s;
+! int c1 = 0, c2 = 0, c3 = 0;
+ struct charstab
+ {
+ int *cp;
+***************
+*** 8001,8008 ****
+--- 8001,8012 ----
+ for (i = 0; i < entries; ++i)
+ if (tab[i].cp != NULL)
+ *(tab[i].cp) = (varp == &p_lcs ? NUL : ' ');
++
+ if (varp == &p_lcs)
++ {
+ lcs_tab1 = NUL;
++ lcs_tab3 = NUL;
++ }
+ else
+ fill_diff = '-';
+ }
+***************
+*** 8016,8021 ****
+--- 8020,8026 ----
+ && p[len] == ':'
+ && p[len + 1] != NUL)
+ {
++ c1 = c2 = c3 = 0;
+ s = p + len + 1;
+ #ifdef FEAT_MBYTE
+ c1 = mb_ptr2char_adv(&s);
+***************
+*** 8035,8041 ****
+--- 8040,8057 ----
+ #else
+ c2 = *s++;
+ #endif
++ if (!(*s == ',' || *s == NUL))
++ {
++ #ifdef FEAT_MBYTE
++ c3 = mb_ptr2char_adv(&s);
++ if (mb_char2cells(c3) > 1)
++ continue;
++ #else
++ c3 = *s++;
++ #endif
++ }
+ }
++
+ if (*s == ',' || *s == NUL)
+ {
+ if (round)
+***************
+*** 8044,8049 ****
+--- 8060,8066 ----
+ {
+ lcs_tab1 = c1;
+ lcs_tab2 = c2;
++ lcs_tab3 = c3;
+ }
+ else if (tab[i].cp != NULL)
+ *(tab[i].cp) = c1;
+*** ../vim-8.1.0758/src/screen.c 2019-01-11 20:34:18.300314693 +0100
+--- src/screen.c 2019-01-16 22:25:51.787632909 +0100
+***************
+*** 3049,3054 ****
+--- 3049,3055 ----
+ char_u *p_extra = NULL; /* string of extra chars, plus NUL */
+ char_u *p_extra_free = NULL; /* p_extra needs to be freed */
+ int c_extra = NUL; /* extra chars, all the same */
++ int c_final = NUL; /* final char, mandatory if set */
+ int extra_attr = 0; /* attributes when n_extra != 0 */
+ static char_u *at_end_str = (char_u *)""; /* used for p_extra when
+ displaying lcs_eol at end-of-line */
+***************
+*** 3059,3064 ****
+--- 3060,3066 ----
+ int saved_n_extra = 0;
+ char_u *saved_p_extra = NULL;
+ int saved_c_extra = 0;
++ int saved_c_final = 0;
+ int saved_char_attr = 0;
+
+ int n_attr = 0; /* chars with special attr */
+***************
+*** 3814,3819 ****
+--- 3816,3822 ----
+ /* Draw the cmdline character. */
+ n_extra = 1;
+ c_extra = cmdwin_type;
++ c_final = NUL;
+ char_attr = HL_ATTR(HLF_AT);
+ }
+ }
+***************
+*** 3839,3844 ****
+--- 3842,3848 ----
+ p_extra_free[n_extra] = NUL;
+ p_extra = p_extra_free;
+ c_extra = NUL;
++ c_final = NUL;
+ char_attr = HL_ATTR(HLF_FC);
+ }
+ }
+***************
+*** 3860,3865 ****
+--- 3864,3870 ----
+
+ /* Draw two cells with the sign value or blank. */
+ c_extra = ' ';
++ c_final = NUL;
+ char_attr = HL_ATTR(HLF_SC);
+ n_extra = 2;
+
+***************
+*** 3878,3886 ****
+--- 3883,3895 ----
+ {
+ /* Use the image in this position. */
+ c_extra = SIGN_BYTE;
++ c_final = NUL;
+ # ifdef FEAT_NETBEANS_INTG
+ if (buf_signcount(wp->w_buffer, lnum) > 1)
++ {
+ c_extra = MULTISIGN_BYTE;
++ c_final = NUL;
++ }
+ # endif
+ char_attr = icon_sign;
+ }
+***************
+*** 3892,3897 ****
+--- 3901,3907 ----
+ if (p_extra != NULL)
+ {
+ c_extra = NUL;
++ c_final = NUL;
+ n_extra = (int)STRLEN(p_extra);
+ }
+ char_attr = sign_get_attr(text_sign, FALSE);
+***************
+*** 3949,3957 ****
+--- 3959,3971 ----
+ #endif
+ p_extra = extra;
+ c_extra = NUL;
++ c_final = NUL;
+ }
+ else
++ {
+ c_extra = ' ';
++ c_final = NUL;
++ }
+ n_extra = number_width(wp) + 1;
+ char_attr = HL_ATTR(HLF_N);
+ #ifdef FEAT_SYN_HL
+***************
+*** 4020,4028 ****
+--- 4034,4048 ----
+ {
+ /* Draw "deleted" diff line(s). */
+ if (char2cells(fill_diff) > 1)
++ {
+ c_extra = '-';
++ c_final = NUL;
++ }
+ else
++ {
+ c_extra = fill_diff;
++ c_final = NUL;
++ }
+ # ifdef FEAT_RIGHTLEFT
+ if (wp->w_p_rl)
+ n_extra = col + 1;
+***************
+*** 4038,4043 ****
+--- 4058,4064 ----
+ /* Draw 'showbreak' at the start of each broken line. */
+ p_extra = p_sbr;
+ c_extra = NUL;
++ c_final = NUL;
+ n_extra = (int)STRLEN(p_sbr);
+ char_attr = HL_ATTR(HLF_AT);
+ need_showbreak = FALSE;
+***************
+*** 4065,4070 ****
+--- 4086,4092 ----
+ /* Continue item from end of wrapped line. */
+ n_extra = saved_n_extra;
+ c_extra = saved_c_extra;
++ c_final = saved_c_final;
+ p_extra = saved_p_extra;
+ char_attr = saved_char_attr;
+ }
+***************
+*** 4364,4378 ****
+ * The "p_extra" points to the extra stuff that is inserted to
+ * represent special characters (non-printable stuff) and other
+ * things. When all characters are the same, c_extra is used.
+ * "p_extra" must end in a NUL to avoid mb_ptr2len() reads past
+ * "p_extra[n_extra]".
+ * For the '$' of the 'list' option, n_extra == 1, p_extra == "".
+ */
+ if (n_extra > 0)
+ {
+! if (c_extra != NUL)
+ {
+! c = c_extra;
+ #ifdef FEAT_MBYTE
+ mb_c = c; /* doesn't handle non-utf-8 multi-byte! */
+ if (enc_utf8 && utf_char2len(c) > 1)
+--- 4386,4401 ----
+ * The "p_extra" points to the extra stuff that is inserted to
+ * represent special characters (non-printable stuff) and other
+ * things. When all characters are the same, c_extra is used.
++ * If c_final is set, it will compulsorily be used at the end.
+ * "p_extra" must end in a NUL to avoid mb_ptr2len() reads past
+ * "p_extra[n_extra]".
+ * For the '$' of the 'list' option, n_extra == 1, p_extra == "".
+ */
+ if (n_extra > 0)
+ {
+! if (c_extra != NUL || (n_extra == 1 && c_final != NUL))
+ {
+! c = (n_extra == 1 && c_final != NUL) ? c_final : c_extra;
+ #ifdef FEAT_MBYTE
+ mb_c = c; /* doesn't handle non-utf-8 multi-byte! */
+ if (enc_utf8 && utf_char2len(c) > 1)
+***************
+*** 4537,4542 ****
+--- 4560,4566 ----
+ mb_utf8 = (c >= 0x80);
+ n_extra = (int)STRLEN(p_extra);
+ c_extra = NUL;
++ c_final = NUL;
+ if (area_attr == 0 && search_attr == 0)
+ {
+ n_attr = n_extra + 1;
+***************
+*** 4605,4610 ****
+--- 4629,4635 ----
+ p_extra = extra;
+ n_extra = (int)STRLEN(extra) - 1;
+ c_extra = NUL;
++ c_final = NUL;
+ c = *p_extra++;
+ if (area_attr == 0 && search_attr == 0)
+ {
+***************
+*** 4645,4650 ****
+--- 4670,4676 ----
+ {
+ n_extra = 1;
+ c_extra = MB_FILLER_CHAR;
++ c_final = NUL;
+ c = ' ';
+ if (area_attr == 0 && search_attr == 0)
+ {
+***************
+*** 4856,4861 ****
+--- 4882,4888 ----
+ # else
+ c_extra = ' ';
+ # endif
++ c_final = NUL;
+ if (VIM_ISWHITE(c))
+ {
+ #ifdef FEAT_CONCEAL
+***************
+*** 5040,5052 ****
+ #endif
+ if (wp->w_p_list)
+ {
+! c = lcs_tab1;
+ #ifdef FEAT_LINEBREAK
+ if (wp->w_p_lbr)
+ c_extra = NUL; /* using p_extra from above */
+ else
+ #endif
+ c_extra = lcs_tab2;
+ n_attr = tab_len + 1;
+ extra_attr = HL_ATTR(HLF_8);
+ saved_attr2 = char_attr; /* save current attr */
+--- 5067,5080 ----
+ #endif
+ if (wp->w_p_list)
+ {
+! c = (n_extra == 0 && lcs_tab3) ? lcs_tab3 : lcs_tab1;
+ #ifdef FEAT_LINEBREAK
+ if (wp->w_p_lbr)
+ c_extra = NUL; /* using p_extra from above */
+ else
+ #endif
+ c_extra = lcs_tab2;
++ c_final = lcs_tab3;
+ n_attr = tab_len + 1;
+ extra_attr = HL_ATTR(HLF_8);
+ saved_attr2 = char_attr; /* save current attr */
+***************
+*** 5062,5067 ****
+--- 5090,5096 ----
+ }
+ else
+ {
++ c_final = NUL;
+ c_extra = ' ';
+ c = ' ';
+ }
+***************
+*** 5111,5116 ****
+--- 5140,5146 ----
+ p_extra = at_end_str;
+ n_extra = 1;
+ c_extra = NUL;
++ c_final = NUL;
+ }
+ }
+ if (wp->w_p_list && lcs_eol > 0)
+***************
+*** 5146,5151 ****
+--- 5176,5182 ----
+ rl_mirror(p_extra); /* reverse "<12>" */
+ #endif
+ c_extra = NUL;
++ c_final = NUL;
+ #ifdef FEAT_LINEBREAK
+ if (wp->w_p_lbr)
+ {
+***************
+*** 5407,5412 ****
+--- 5438,5444 ----
+ /* Double-width character being overwritten by the "precedes"
+ * character, need to fill up half the character. */
+ c_extra = MB_FILLER_CHAR;
++ c_final = NUL;
+ n_extra = 1;
+ n_attr = 2;
+ extra_attr = HL_ATTR(HLF_AT);
+***************
+*** 6064,6069 ****
+--- 6096,6102 ----
+ saved_n_extra = n_extra;
+ saved_p_extra = p_extra;
+ saved_c_extra = c_extra;
++ saved_c_final = c_final;
+ saved_char_attr = char_attr;
+ n_extra = 0;
+ lcs_prec_todo = lcs_prec;
+*** ../vim-8.1.0758/src/testdir/test_listchars.vim 2017-11-16 21:41:26.000000000 +0100
+--- src/testdir/test_listchars.vim 2019-01-16 22:25:51.787632909 +0100
+***************
+*** 42,47 ****
+--- 42,79 ----
+ call assert_equal([expected[i - 1]], ScreenLines(i, virtcol('$')))
+ endfor
+
++ " tab with 3rd character.
++ set listchars-=tab:>-
++ set listchars+=tab:<=>,trail:-
++ let expected = [
++ \ '<======>aa<====>$',
++ \ '..bb<==>--$',
++ \ '...cccc>-$',
++ \ 'dd........ee--<>$',
++ \ '-$'
++ \ ]
++ redraw!
++ for i in range(1, 5)
++ call cursor(i, 1)
++ call assert_equal([expected[i - 1]], ScreenLines(i, virtcol('$')))
++ endfor
++
++ set listchars-=trail:-
++ let expected = [
++ \ '<======>aa<====>$',
++ \ '..bb<==>..$',
++ \ '...cccc>.$',
++ \ 'dd........ee..<>$',
++ \ '.$'
++ \ ]
++ redraw!
++ for i in range(1, 5)
++ call cursor(i, 1)
++ call assert_equal([expected[i - 1]], ScreenLines(i, virtcol('$')))
++ endfor
++
++ set listchars-=tab:<=>
++ set listchars+=tab:>-
+ set listchars+=trail:<
+ set nolist
+ normal ggdG
+*** ../vim-8.1.0758/src/version.c 2019-01-16 22:15:07.872962363 +0100
+--- src/version.c 2019-01-16 22:26:24.651365857 +0100
+***************
+*** 797,798 ****
+--- 797,800 ----
+ { /* Add new patch number below this line */
++ /**/
++ 759,
+ /**/
+
+--
+hundred-and-one symptoms of being an internet addict:
+228. You spend Saturday night making the counter on your home page
+ pass that 2000 mark.
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net \\\
+/// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\ an exciting new programming language -- http://www.Zimbu.org ///
+ \\\ help me help AIDS victims -- http://ICCF-Holland.org ///
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