--- /dev/null
+/* 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.
+ */
+
+/*
+ * change.c: functions related to changing text
+ */
+
+#include "vim.h"
+
+/*
+ * If the file is readonly, give a warning message with the first change.
+ * Don't do this for autocommands.
+ * Doesn't use emsg(), because it flushes the macro buffer.
+ * If we have undone all changes b_changed will be FALSE, but "b_did_warn"
+ * will be TRUE.
+ * "col" is the column for the message; non-zero when in insert mode and
+ * 'showmode' is on.
+ * Careful: may trigger autocommands that reload the buffer.
+ */
+ void
+change_warning(int col)
+{
+ static char *w_readonly = N_("W10: Warning: Changing a readonly file");
+
+ if (curbuf->b_did_warn == FALSE
+ && curbufIsChanged() == 0
+ && !autocmd_busy
+ && curbuf->b_p_ro)
+ {
+ ++curbuf_lock;
+ apply_autocmds(EVENT_FILECHANGEDRO, NULL, NULL, FALSE, curbuf);
+ --curbuf_lock;
+ if (!curbuf->b_p_ro)
+ return;
+
+ // Do what msg() does, but with a column offset if the warning should
+ // be after the mode message.
+ msg_start();
+ if (msg_row == Rows - 1)
+ msg_col = col;
+ msg_source(HL_ATTR(HLF_W));
+ msg_puts_attr(_(w_readonly), HL_ATTR(HLF_W) | MSG_HIST);
+#ifdef FEAT_EVAL
+ set_vim_var_string(VV_WARNINGMSG, (char_u *)_(w_readonly), -1);
+#endif
+ msg_clr_eos();
+ (void)msg_end();
+ if (msg_silent == 0 && !silent_mode
+#ifdef FEAT_EVAL
+ && time_for_testing != 1
+#endif
+ )
+ {
+ out_flush();
+ ui_delay(1000L, TRUE); // give the user time to think about it
+ }
+ curbuf->b_did_warn = TRUE;
+ redraw_cmdline = FALSE; // don't redraw and erase the message
+ if (msg_row < Rows - 1)
+ showmode();
+ }
+}
+
+/*
+ * Call this function when something in the current buffer is changed.
+ *
+ * Most often called through changed_bytes() and changed_lines(), which also
+ * mark the area of the display to be redrawn.
+ *
+ * Careful: may trigger autocommands that reload the buffer.
+ */
+ void
+changed(void)
+{
+#if defined(FEAT_XIM) && defined(FEAT_GUI_GTK)
+ if (p_imst == IM_ON_THE_SPOT)
+ {
+ // The text of the preediting area is inserted, but this doesn't
+ // mean a change of the buffer yet. That is delayed until the
+ // text is committed. (this means preedit becomes empty)
+ if (im_is_preediting() && !xim_changed_while_preediting)
+ return;
+ xim_changed_while_preediting = FALSE;
+ }
+#endif
+
+ if (!curbuf->b_changed)
+ {
+ int save_msg_scroll = msg_scroll;
+
+ // Give a warning about changing a read-only file. This may also
+ // check-out the file, thus change "curbuf"!
+ change_warning(0);
+
+ // Create a swap file if that is wanted.
+ // Don't do this for "nofile" and "nowrite" buffer types.
+ if (curbuf->b_may_swap
+#ifdef FEAT_QUICKFIX
+ && !bt_dontwrite(curbuf)
+#endif
+ )
+ {
+ int save_need_wait_return = need_wait_return;
+
+ need_wait_return = FALSE;
+ ml_open_file(curbuf);
+
+ // The ml_open_file() can cause an ATTENTION message.
+ // Wait two seconds, to make sure the user reads this unexpected
+ // message. Since we could be anywhere, call wait_return() now,
+ // and don't let the emsg() set msg_scroll.
+ if (need_wait_return && emsg_silent == 0)
+ {
+ out_flush();
+ ui_delay(2000L, TRUE);
+ wait_return(TRUE);
+ msg_scroll = save_msg_scroll;
+ }
+ else
+ need_wait_return = save_need_wait_return;
+ }
+ changed_internal();
+ }
+ ++CHANGEDTICK(curbuf);
+
+#ifdef FEAT_SEARCH_EXTRA
+ // If a pattern is highlighted, the position may now be invalid.
+ highlight_match = FALSE;
+#endif
+}
+
+/*
+ * Internal part of changed(), no user interaction.
+ * Also used for recovery.
+ */
+ void
+changed_internal(void)
+{
+ curbuf->b_changed = TRUE;
+ ml_setflags(curbuf);
+ check_status(curbuf);
+ redraw_tabline = TRUE;
+#ifdef FEAT_TITLE
+ need_maketitle = TRUE; // set window title later
+#endif
+}
+
+/*
+ * Common code for when a change was made.
+ * See changed_lines() for the arguments.
+ * Careful: may trigger autocommands that reload the buffer.
+ */
+ static void
+changed_common(
+ linenr_T lnum,
+ colnr_T col,
+ linenr_T lnume,
+ long xtra)
+{
+ win_T *wp;
+ tabpage_T *tp;
+ int i;
+#ifdef FEAT_JUMPLIST
+ int cols;
+ pos_T *p;
+ int add;
+#endif
+
+ // mark the buffer as modified
+ changed();
+
+#ifdef FEAT_DIFF
+ if (curwin->w_p_diff && diff_internal())
+ curtab->tp_diff_update = TRUE;
+#endif
+
+ // set the '. mark
+ if (!cmdmod.keepjumps)
+ {
+ curbuf->b_last_change.lnum = lnum;
+ curbuf->b_last_change.col = col;
+
+#ifdef FEAT_JUMPLIST
+ // Create a new entry if a new undo-able change was started or we
+ // don't have an entry yet.
+ if (curbuf->b_new_change || curbuf->b_changelistlen == 0)
+ {
+ if (curbuf->b_changelistlen == 0)
+ add = TRUE;
+ else
+ {
+ // Don't create a new entry when the line number is the same
+ // as the last one and the column is not too far away. Avoids
+ // creating many entries for typing "xxxxx".
+ p = &curbuf->b_changelist[curbuf->b_changelistlen - 1];
+ if (p->lnum != lnum)
+ add = TRUE;
+ else
+ {
+ cols = comp_textwidth(FALSE);
+ if (cols == 0)
+ cols = 79;
+ add = (p->col + cols < col || col + cols < p->col);
+ }
+ }
+ if (add)
+ {
+ // This is the first of a new sequence of undo-able changes
+ // and it's at some distance of the last change. Use a new
+ // position in the changelist.
+ curbuf->b_new_change = FALSE;
+
+ if (curbuf->b_changelistlen == JUMPLISTSIZE)
+ {
+ // changelist is full: remove oldest entry
+ curbuf->b_changelistlen = JUMPLISTSIZE - 1;
+ mch_memmove(curbuf->b_changelist, curbuf->b_changelist + 1,
+ sizeof(pos_T) * (JUMPLISTSIZE - 1));
+ FOR_ALL_TAB_WINDOWS(tp, wp)
+ {
+ // Correct position in changelist for other windows on
+ // this buffer.
+ if (wp->w_buffer == curbuf && wp->w_changelistidx > 0)
+ --wp->w_changelistidx;
+ }
+ }
+ FOR_ALL_TAB_WINDOWS(tp, wp)
+ {
+ // For other windows, if the position in the changelist is
+ // at the end it stays at the end.
+ if (wp->w_buffer == curbuf
+ && wp->w_changelistidx == curbuf->b_changelistlen)
+ ++wp->w_changelistidx;
+ }
+ ++curbuf->b_changelistlen;
+ }
+ }
+ curbuf->b_changelist[curbuf->b_changelistlen - 1] =
+ curbuf->b_last_change;
+ // The current window is always after the last change, so that "g,"
+ // takes you back to it.
+ curwin->w_changelistidx = curbuf->b_changelistlen;
+#endif
+ }
+
+ FOR_ALL_TAB_WINDOWS(tp, wp)
+ {
+ if (wp->w_buffer == curbuf)
+ {
+ // Mark this window to be redrawn later.
+ if (wp->w_redr_type < VALID)
+ wp->w_redr_type = VALID;
+
+ // Check if a change in the buffer has invalidated the cached
+ // values for the cursor.
+#ifdef FEAT_FOLDING
+ // Update the folds for this window. Can't postpone this, because
+ // a following operator might work on the whole fold: ">>dd".
+ foldUpdate(wp, lnum, lnume + xtra - 1);
+
+ // The change may cause lines above or below the change to become
+ // included in a fold. Set lnum/lnume to the first/last line that
+ // might be displayed differently.
+ // Set w_cline_folded here as an efficient way to update it when
+ // inserting lines just above a closed fold.
+ i = hasFoldingWin(wp, lnum, &lnum, NULL, FALSE, NULL);
+ if (wp->w_cursor.lnum == lnum)
+ wp->w_cline_folded = i;
+ i = hasFoldingWin(wp, lnume, NULL, &lnume, FALSE, NULL);
+ if (wp->w_cursor.lnum == lnume)
+ wp->w_cline_folded = i;
+
+ // If the changed line is in a range of previously folded lines,
+ // compare with the first line in that range.
+ if (wp->w_cursor.lnum <= lnum)
+ {
+ i = find_wl_entry(wp, lnum);
+ if (i >= 0 && wp->w_cursor.lnum > wp->w_lines[i].wl_lnum)
+ changed_line_abv_curs_win(wp);
+ }
+#endif
+
+ if (wp->w_cursor.lnum > lnum)
+ changed_line_abv_curs_win(wp);
+ else if (wp->w_cursor.lnum == lnum && wp->w_cursor.col >= col)
+ changed_cline_bef_curs_win(wp);
+ if (wp->w_botline >= lnum)
+ {
+ // Assume that botline doesn't change (inserted lines make
+ // other lines scroll down below botline).
+ approximate_botline_win(wp);
+ }
+
+ // Check if any w_lines[] entries have become invalid.
+ // For entries below the change: Correct the lnums for
+ // inserted/deleted lines. Makes it possible to stop displaying
+ // after the change.
+ for (i = 0; i < wp->w_lines_valid; ++i)
+ if (wp->w_lines[i].wl_valid)
+ {
+ if (wp->w_lines[i].wl_lnum >= lnum)
+ {
+ if (wp->w_lines[i].wl_lnum < lnume)
+ {
+ // line included in change
+ wp->w_lines[i].wl_valid = FALSE;
+ }
+ else if (xtra != 0)
+ {
+ // line below change
+ wp->w_lines[i].wl_lnum += xtra;
+#ifdef FEAT_FOLDING
+ wp->w_lines[i].wl_lastlnum += xtra;
+#endif
+ }
+ }
+#ifdef FEAT_FOLDING
+ else if (wp->w_lines[i].wl_lastlnum >= lnum)
+ {
+ // change somewhere inside this range of folded lines,
+ // may need to be redrawn
+ wp->w_lines[i].wl_valid = FALSE;
+ }
+#endif
+ }
+
+#ifdef FEAT_FOLDING
+ // Take care of side effects for setting w_topline when folds have
+ // changed. Esp. when the buffer was changed in another window.
+ if (hasAnyFolding(wp))
+ set_topline(wp, wp->w_topline);
+#endif
+ // relative numbering may require updating more
+ if (wp->w_p_rnu)
+ redraw_win_later(wp, SOME_VALID);
+ }
+ }
+
+ // Call update_screen() later, which checks out what needs to be redrawn,
+ // since it notices b_mod_set and then uses b_mod_*.
+ if (must_redraw < VALID)
+ must_redraw = VALID;
+
+ // when the cursor line is changed always trigger CursorMoved
+ if (lnum <= curwin->w_cursor.lnum
+ && lnume + (xtra < 0 ? -xtra : xtra) > curwin->w_cursor.lnum)
+ last_cursormoved.lnum = 0;
+}
+
+ static void
+changedOneline(buf_T *buf, linenr_T lnum)
+{
+ if (buf->b_mod_set)
+ {
+ // find the maximum area that must be redisplayed
+ if (lnum < buf->b_mod_top)
+ buf->b_mod_top = lnum;
+ else if (lnum >= buf->b_mod_bot)
+ buf->b_mod_bot = lnum + 1;
+ }
+ else
+ {
+ // set the area that must be redisplayed to one line
+ buf->b_mod_set = TRUE;
+ buf->b_mod_top = lnum;
+ buf->b_mod_bot = lnum + 1;
+ buf->b_mod_xlines = 0;
+ }
+}
+
+/*
+ * Changed bytes within a single line for the current buffer.
+ * - marks the windows on this buffer to be redisplayed
+ * - marks the buffer changed by calling changed()
+ * - invalidates cached values
+ * Careful: may trigger autocommands that reload the buffer.
+ */
+ void
+changed_bytes(linenr_T lnum, colnr_T col)
+{
+ changedOneline(curbuf, lnum);
+ changed_common(lnum, col, lnum + 1, 0L);
+
+#ifdef FEAT_DIFF
+ // Diff highlighting in other diff windows may need to be updated too.
+ if (curwin->w_p_diff)
+ {
+ win_T *wp;
+ linenr_T wlnum;
+
+ FOR_ALL_WINDOWS(wp)
+ if (wp->w_p_diff && wp != curwin)
+ {
+ redraw_win_later(wp, VALID);
+ wlnum = diff_lnum_win(lnum, wp);
+ if (wlnum > 0)
+ changedOneline(wp->w_buffer, wlnum);
+ }
+ }
+#endif
+}
+
+/*
+ * Like changed_bytes() but also adjust text properties for "added" bytes.
+ * When "added" is negative text was deleted.
+ */
+ void
+inserted_bytes(linenr_T lnum, colnr_T col, int added UNUSED)
+{
+ changed_bytes(lnum, col);
+
+#ifdef FEAT_TEXT_PROP
+ if (curbuf->b_has_textprop && added != 0)
+ adjust_prop_columns(lnum, col, added);
+#endif
+}
+
+/*
+ * Appended "count" lines below line "lnum" in the current buffer.
+ * Must be called AFTER the change and after mark_adjust().
+ * Takes care of marking the buffer to be redrawn and sets the changed flag.
+ */
+ void
+appended_lines(linenr_T lnum, long count)
+{
+ changed_lines(lnum + 1, 0, lnum + 1, count);
+}
+
+/*
+ * Like appended_lines(), but adjust marks first.
+ */
+ void
+appended_lines_mark(linenr_T lnum, long count)
+{
+ // Skip mark_adjust when adding a line after the last one, there can't
+ // be marks there. But it's still needed in diff mode.
+ if (lnum + count < curbuf->b_ml.ml_line_count
+#ifdef FEAT_DIFF
+ || curwin->w_p_diff
+#endif
+ )
+ mark_adjust(lnum + 1, (linenr_T)MAXLNUM, count, 0L);
+ changed_lines(lnum + 1, 0, lnum + 1, count);
+}
+
+/*
+ * Deleted "count" lines at line "lnum" in the current buffer.
+ * Must be called AFTER the change and after mark_adjust().
+ * Takes care of marking the buffer to be redrawn and sets the changed flag.
+ */
+ void
+deleted_lines(linenr_T lnum, long count)
+{
+ changed_lines(lnum, 0, lnum + count, -count);
+}
+
+/*
+ * Like deleted_lines(), but adjust marks first.
+ * Make sure the cursor is on a valid line before calling, a GUI callback may
+ * be triggered to display the cursor.
+ */
+ void
+deleted_lines_mark(linenr_T lnum, long count)
+{
+ mark_adjust(lnum, (linenr_T)(lnum + count - 1), (long)MAXLNUM, -count);
+ changed_lines(lnum, 0, lnum + count, -count);
+}
+
+/*
+ * Marks the area to be redrawn after a change.
+ */
+ static void
+changed_lines_buf(
+ buf_T *buf,
+ linenr_T lnum, // first line with change
+ linenr_T lnume, // line below last changed line
+ long xtra) // number of extra lines (negative when deleting)
+{
+ if (buf->b_mod_set)
+ {
+ // find the maximum area that must be redisplayed
+ if (lnum < buf->b_mod_top)
+ buf->b_mod_top = lnum;
+ if (lnum < buf->b_mod_bot)
+ {
+ // adjust old bot position for xtra lines
+ buf->b_mod_bot += xtra;
+ if (buf->b_mod_bot < lnum)
+ buf->b_mod_bot = lnum;
+ }
+ if (lnume + xtra > buf->b_mod_bot)
+ buf->b_mod_bot = lnume + xtra;
+ buf->b_mod_xlines += xtra;
+ }
+ else
+ {
+ // set the area that must be redisplayed
+ buf->b_mod_set = TRUE;
+ buf->b_mod_top = lnum;
+ buf->b_mod_bot = lnume + xtra;
+ buf->b_mod_xlines = xtra;
+ }
+}
+
+/*
+ * Changed lines for the current buffer.
+ * Must be called AFTER the change and after mark_adjust().
+ * - mark the buffer changed by calling changed()
+ * - mark the windows on this buffer to be redisplayed
+ * - invalidate cached values
+ * "lnum" is the first line that needs displaying, "lnume" the first line
+ * below the changed lines (BEFORE the change).
+ * When only inserting lines, "lnum" and "lnume" are equal.
+ * Takes care of calling changed() and updating b_mod_*.
+ * Careful: may trigger autocommands that reload the buffer.
+ */
+ void
+changed_lines(
+ linenr_T lnum, // first line with change
+ colnr_T col, // column in first line with change
+ linenr_T lnume, // line below last changed line
+ long xtra) // number of extra lines (negative when deleting)
+{
+ changed_lines_buf(curbuf, lnum, lnume, xtra);
+
+#ifdef FEAT_DIFF
+ if (xtra == 0 && curwin->w_p_diff && !diff_internal())
+ {
+ // When the number of lines doesn't change then mark_adjust() isn't
+ // called and other diff buffers still need to be marked for
+ // displaying.
+ win_T *wp;
+ linenr_T wlnum;
+
+ FOR_ALL_WINDOWS(wp)
+ if (wp->w_p_diff && wp != curwin)
+ {
+ redraw_win_later(wp, VALID);
+ wlnum = diff_lnum_win(lnum, wp);
+ if (wlnum > 0)
+ changed_lines_buf(wp->w_buffer, wlnum,
+ lnume - lnum + wlnum, 0L);
+ }
+ }
+#endif
+
+ changed_common(lnum, col, lnume, xtra);
+}
+
+/*
+ * Called when the changed flag must be reset for buffer "buf".
+ * When "ff" is TRUE also reset 'fileformat'.
+ */
+ void
+unchanged(buf_T *buf, int ff)
+{
+ if (buf->b_changed || (ff && file_ff_differs(buf, FALSE)))
+ {
+ buf->b_changed = 0;
+ ml_setflags(buf);
+ if (ff)
+ save_file_ff(buf);
+ check_status(buf);
+ redraw_tabline = TRUE;
+#ifdef FEAT_TITLE
+ need_maketitle = TRUE; // set window title later
+#endif
+ }
+ ++CHANGEDTICK(buf);
+#ifdef FEAT_NETBEANS_INTG
+ netbeans_unmodified(buf);
+#endif
+}
+
+/*
+ * Insert string "p" at the cursor position. Stops at a NUL byte.
+ * Handles Replace mode and multi-byte characters.
+ */
+ void
+ins_bytes(char_u *p)
+{
+ ins_bytes_len(p, (int)STRLEN(p));
+}
+
+/*
+ * Insert string "p" with length "len" at the cursor position.
+ * Handles Replace mode and multi-byte characters.
+ */
+ void
+ins_bytes_len(char_u *p, int len)
+{
+ int i;
+ int n;
+
+ if (has_mbyte)
+ for (i = 0; i < len; i += n)
+ {
+ if (enc_utf8)
+ // avoid reading past p[len]
+ n = utfc_ptr2len_len(p + i, len - i);
+ else
+ n = (*mb_ptr2len)(p + i);
+ ins_char_bytes(p + i, n);
+ }
+ else
+ for (i = 0; i < len; ++i)
+ ins_char(p[i]);
+}
+
+/*
+ * Insert or replace a single character at the cursor position.
+ * When in REPLACE or VREPLACE mode, replace any existing character.
+ * Caller must have prepared for undo.
+ * For multi-byte characters we get the whole character, the caller must
+ * convert bytes to a character.
+ */
+ void
+ins_char(int c)
+{
+ char_u buf[MB_MAXBYTES + 1];
+ int n = (*mb_char2bytes)(c, buf);
+
+ // When "c" is 0x100, 0x200, etc. we don't want to insert a NUL byte.
+ // Happens for CTRL-Vu9900.
+ if (buf[0] == 0)
+ buf[0] = '\n';
+
+ ins_char_bytes(buf, n);
+}
+
+ void
+ins_char_bytes(char_u *buf, int charlen)
+{
+ int c = buf[0];
+ int newlen; // nr of bytes inserted
+ int oldlen; // nr of bytes deleted (0 when not replacing)
+ char_u *p;
+ char_u *newp;
+ char_u *oldp;
+ int linelen; // length of old line including NUL
+ colnr_T col;
+ linenr_T lnum = curwin->w_cursor.lnum;
+ int i;
+
+ // Break tabs if needed.
+ if (virtual_active() && curwin->w_cursor.coladd > 0)
+ coladvance_force(getviscol());
+
+ col = curwin->w_cursor.col;
+ oldp = ml_get(lnum);
+ linelen = (int)STRLEN(oldp) + 1;
+
+ // The lengths default to the values for when not replacing.
+ oldlen = 0;
+ newlen = charlen;
+
+ if (State & REPLACE_FLAG)
+ {
+ if (State & VREPLACE_FLAG)
+ {
+ colnr_T new_vcol = 0; // init for GCC
+ colnr_T vcol;
+ int old_list;
+
+ // Disable 'list' temporarily, unless 'cpo' contains the 'L' flag.
+ // Returns the old value of list, so when finished,
+ // curwin->w_p_list should be set back to this.
+ old_list = curwin->w_p_list;
+ if (old_list && vim_strchr(p_cpo, CPO_LISTWM) == NULL)
+ curwin->w_p_list = FALSE;
+
+ // In virtual replace mode each character may replace one or more
+ // characters (zero if it's a TAB). Count the number of bytes to
+ // be deleted to make room for the new character, counting screen
+ // cells. May result in adding spaces to fill a gap.
+ getvcol(curwin, &curwin->w_cursor, NULL, &vcol, NULL);
+ new_vcol = vcol + chartabsize(buf, vcol);
+ while (oldp[col + oldlen] != NUL && vcol < new_vcol)
+ {
+ vcol += chartabsize(oldp + col + oldlen, vcol);
+ // Don't need to remove a TAB that takes us to the right
+ // position.
+ if (vcol > new_vcol && oldp[col + oldlen] == TAB)
+ break;
+ oldlen += (*mb_ptr2len)(oldp + col + oldlen);
+ // Deleted a bit too much, insert spaces.
+ if (vcol > new_vcol)
+ newlen += vcol - new_vcol;
+ }
+ curwin->w_p_list = old_list;
+ }
+ else if (oldp[col] != NUL)
+ {
+ // normal replace
+ oldlen = (*mb_ptr2len)(oldp + col);
+ }
+
+
+ // Push the replaced bytes onto the replace stack, so that they can be
+ // put back when BS is used. The bytes of a multi-byte character are
+ // done the other way around, so that the first byte is popped off
+ // first (it tells the byte length of the character).
+ replace_push(NUL);
+ for (i = 0; i < oldlen; ++i)
+ {
+ if (has_mbyte)
+ i += replace_push_mb(oldp + col + i) - 1;
+ else
+ replace_push(oldp[col + i]);
+ }
+ }
+
+ newp = alloc_check((unsigned)(linelen + newlen - oldlen));
+ if (newp == NULL)
+ return;
+
+ // Copy bytes before the cursor.
+ if (col > 0)
+ mch_memmove(newp, oldp, (size_t)col);
+
+ // Copy bytes after the changed character(s).
+ p = newp + col;
+ if (linelen > col + oldlen)
+ mch_memmove(p + newlen, oldp + col + oldlen,
+ (size_t)(linelen - col - oldlen));
+
+ // Insert or overwrite the new character.
+ mch_memmove(p, buf, charlen);
+ i = charlen;
+
+ // Fill with spaces when necessary.
+ while (i < newlen)
+ p[i++] = ' ';
+
+ // Replace the line in the buffer.
+ ml_replace(lnum, newp, FALSE);
+
+ // mark the buffer as changed and prepare for displaying
+ inserted_bytes(lnum, col, newlen - oldlen);
+
+ // If we're in Insert or Replace mode and 'showmatch' is set, then briefly
+ // show the match for right parens and braces.
+ if (p_sm && (State & INSERT)
+ && msg_silent == 0
+#ifdef FEAT_INS_EXPAND
+ && !ins_compl_active()
+#endif
+ )
+ {
+ if (has_mbyte)
+ showmatch(mb_ptr2char(buf));
+ else
+ showmatch(c);
+ }
+
+#ifdef FEAT_RIGHTLEFT
+ if (!p_ri || (State & REPLACE_FLAG))
+#endif
+ {
+ // Normal insert: move cursor right
+ curwin->w_cursor.col += charlen;
+ }
+
+ // TODO: should try to update w_row here, to avoid recomputing it later.
+}
+
+/*
+ * Insert a string at the cursor position.
+ * Note: Does NOT handle Replace mode.
+ * Caller must have prepared for undo.
+ */
+ void
+ins_str(char_u *s)
+{
+ char_u *oldp, *newp;
+ int newlen = (int)STRLEN(s);
+ int oldlen;
+ colnr_T col;
+ linenr_T lnum = curwin->w_cursor.lnum;
+
+ if (virtual_active() && curwin->w_cursor.coladd > 0)
+ coladvance_force(getviscol());
+
+ col = curwin->w_cursor.col;
+ oldp = ml_get(lnum);
+ oldlen = (int)STRLEN(oldp);
+
+ newp = alloc_check((unsigned)(oldlen + newlen + 1));
+ if (newp == NULL)
+ return;
+ if (col > 0)
+ mch_memmove(newp, oldp, (size_t)col);
+ mch_memmove(newp + col, s, (size_t)newlen);
+ mch_memmove(newp + col + newlen, oldp + col, (size_t)(oldlen - col + 1));
+ ml_replace(lnum, newp, FALSE);
+ inserted_bytes(lnum, col, newlen);
+ curwin->w_cursor.col += newlen;
+}
+
+/*
+ * Delete one character under the cursor.
+ * If "fixpos" is TRUE, don't leave the cursor on the NUL after the line.
+ * Caller must have prepared for undo.
+ *
+ * return FAIL for failure, OK otherwise
+ */
+ int
+del_char(int fixpos)
+{
+ if (has_mbyte)
+ {
+ // Make sure the cursor is at the start of a character.
+ mb_adjust_cursor();
+ if (*ml_get_cursor() == NUL)
+ return FAIL;
+ return del_chars(1L, fixpos);
+ }
+ return del_bytes(1L, fixpos, TRUE);
+}
+
+/*
+ * Like del_bytes(), but delete characters instead of bytes.
+ */
+ int
+del_chars(long count, int fixpos)
+{
+ long bytes = 0;
+ long i;
+ char_u *p;
+ int l;
+
+ p = ml_get_cursor();
+ for (i = 0; i < count && *p != NUL; ++i)
+ {
+ l = (*mb_ptr2len)(p);
+ bytes += l;
+ p += l;
+ }
+ return del_bytes(bytes, fixpos, TRUE);
+}
+
+/*
+ * Delete "count" bytes under the cursor.
+ * If "fixpos" is TRUE, don't leave the cursor on the NUL after the line.
+ * Caller must have prepared for undo.
+ *
+ * Return FAIL for failure, OK otherwise.
+ */
+ int
+del_bytes(
+ long count,
+ int fixpos_arg,
+ int use_delcombine UNUSED) // 'delcombine' option applies
+{
+ char_u *oldp, *newp;
+ colnr_T oldlen;
+ colnr_T newlen;
+ linenr_T lnum = curwin->w_cursor.lnum;
+ colnr_T col = curwin->w_cursor.col;
+ int alloc_newp;
+ long movelen;
+ int fixpos = fixpos_arg;
+
+ oldp = ml_get(lnum);
+ oldlen = (int)STRLEN(oldp);
+
+ // Can't do anything when the cursor is on the NUL after the line.
+ if (col >= oldlen)
+ return FAIL;
+
+ // If "count" is zero there is nothing to do.
+ if (count == 0)
+ return OK;
+
+ // If "count" is negative the caller must be doing something wrong.
+ if (count < 1)
+ {
+ siemsg("E950: Invalid count for del_bytes(): %ld", count);
+ return FAIL;
+ }
+
+ // If 'delcombine' is set and deleting (less than) one character, only
+ // delete the last combining character.
+ if (p_deco && use_delcombine && enc_utf8
+ && utfc_ptr2len(oldp + col) >= count)
+ {
+ int cc[MAX_MCO];
+ int n;
+
+ (void)utfc_ptr2char(oldp + col, cc);
+ if (cc[0] != NUL)
+ {
+ // Find the last composing char, there can be several.
+ n = col;
+ do
+ {
+ col = n;
+ count = utf_ptr2len(oldp + n);
+ n += count;
+ } while (UTF_COMPOSINGLIKE(oldp + col, oldp + n));
+ fixpos = 0;
+ }
+ }
+
+ // When count is too big, reduce it.
+ movelen = (long)oldlen - (long)col - count + 1; // includes trailing NUL
+ if (movelen <= 1)
+ {
+ // If we just took off the last character of a non-blank line, and
+ // fixpos is TRUE, we don't want to end up positioned at the NUL,
+ // unless "restart_edit" is set or 'virtualedit' contains "onemore".
+ if (col > 0 && fixpos && restart_edit == 0
+ && (ve_flags & VE_ONEMORE) == 0)
+ {
+ --curwin->w_cursor.col;
+ curwin->w_cursor.coladd = 0;
+ if (has_mbyte)
+ curwin->w_cursor.col -=
+ (*mb_head_off)(oldp, oldp + curwin->w_cursor.col);
+ }
+ count = oldlen - col;
+ movelen = 1;
+ }
+ newlen = oldlen - count;
+
+ // If the old line has been allocated the deletion can be done in the
+ // existing line. Otherwise a new line has to be allocated
+ // Can't do this when using Netbeans, because we would need to invoke
+ // netbeans_removed(), which deallocates the line. Let ml_replace() take
+ // care of notifying Netbeans.
+#ifdef FEAT_NETBEANS_INTG
+ if (netbeans_active())
+ alloc_newp = TRUE;
+ else
+#endif
+ alloc_newp = !ml_line_alloced(); // check if oldp was allocated
+ if (!alloc_newp)
+ newp = oldp; // use same allocated memory
+ else
+ { // need to allocate a new line
+ newp = alloc((unsigned)(newlen + 1));
+ if (newp == NULL)
+ return FAIL;
+ mch_memmove(newp, oldp, (size_t)col);
+ }
+ mch_memmove(newp + col, oldp + col + count, (size_t)movelen);
+ if (alloc_newp)
+ ml_replace(lnum, newp, FALSE);
+#ifdef FEAT_TEXT_PROP
+ else
+ {
+ // Also move any following text properties.
+ if (oldlen + 1 < curbuf->b_ml.ml_line_len)
+ mch_memmove(newp + newlen + 1, oldp + oldlen + 1,
+ (size_t)curbuf->b_ml.ml_line_len - oldlen - 1);
+ curbuf->b_ml.ml_line_len -= count;
+ }
+#endif
+
+ // mark the buffer as changed and prepare for displaying
+ inserted_bytes(lnum, curwin->w_cursor.col, -count);
+
+ return OK;
+}
+
+/*
+ * Copy the indent from ptr to the current line (and fill to size)
+ * Leaves the cursor on the first non-blank in the line.
+ * Returns TRUE if the line was changed.
+ */
+ static int
+copy_indent(int size, char_u *src)
+{
+ char_u *p = NULL;
+ char_u *line = NULL;
+ char_u *s;
+ int todo;
+ int ind_len;
+ int line_len = 0;
+ int tab_pad;
+ int ind_done;
+ int round;
+#ifdef FEAT_VARTABS
+ int ind_col;
+#endif
+
+ // Round 1: compute the number of characters needed for the indent
+ // Round 2: copy the characters.
+ for (round = 1; round <= 2; ++round)
+ {
+ todo = size;
+ ind_len = 0;
+ ind_done = 0;
+#ifdef FEAT_VARTABS
+ ind_col = 0;
+#endif
+ s = src;
+
+ // Count/copy the usable portion of the source line
+ while (todo > 0 && VIM_ISWHITE(*s))
+ {
+ if (*s == TAB)
+ {
+#ifdef FEAT_VARTABS
+ tab_pad = tabstop_padding(ind_done, curbuf->b_p_ts,
+ curbuf->b_p_vts_array);
+#else
+ tab_pad = (int)curbuf->b_p_ts
+ - (ind_done % (int)curbuf->b_p_ts);
+#endif
+ // Stop if this tab will overshoot the target
+ if (todo < tab_pad)
+ break;
+ todo -= tab_pad;
+ ind_done += tab_pad;
+#ifdef FEAT_VARTABS
+ ind_col += tab_pad;
+#endif
+ }
+ else
+ {
+ --todo;
+ ++ind_done;
+#ifdef FEAT_VARTABS
+ ++ind_col;
+#endif
+ }
+ ++ind_len;
+ if (p != NULL)
+ *p++ = *s;
+ ++s;
+ }
+
+ // Fill to next tabstop with a tab, if possible
+#ifdef FEAT_VARTABS
+ tab_pad = tabstop_padding(ind_done, curbuf->b_p_ts,
+ curbuf->b_p_vts_array);
+#else
+ tab_pad = (int)curbuf->b_p_ts - (ind_done % (int)curbuf->b_p_ts);
+#endif
+ if (todo >= tab_pad && !curbuf->b_p_et)
+ {
+ todo -= tab_pad;
+ ++ind_len;
+#ifdef FEAT_VARTABS
+ ind_col += tab_pad;
+#endif
+ if (p != NULL)
+ *p++ = TAB;
+ }
+
+ // Add tabs required for indent
+ if (!curbuf->b_p_et)
+ {
+#ifdef FEAT_VARTABS
+ for (;;)
+ {
+ tab_pad = tabstop_padding(ind_col, curbuf->b_p_ts,
+ curbuf->b_p_vts_array);
+ if (todo < tab_pad)
+ break;
+ todo -= tab_pad;
+ ++ind_len;
+ ind_col += tab_pad;
+ if (p != NULL)
+ *p++ = TAB;
+ }
+#else
+ while (todo >= (int)curbuf->b_p_ts)
+ {
+ todo -= (int)curbuf->b_p_ts;
+ ++ind_len;
+ if (p != NULL)
+ *p++ = TAB;
+ }
+#endif
+ }
+
+ // Count/add spaces required for indent
+ while (todo > 0)
+ {
+ --todo;
+ ++ind_len;
+ if (p != NULL)
+ *p++ = ' ';
+ }
+
+ if (p == NULL)
+ {
+ // Allocate memory for the result: the copied indent, new indent
+ // and the rest of the line.
+ line_len = (int)STRLEN(ml_get_curline()) + 1;
+ line = alloc(ind_len + line_len);
+ if (line == NULL)
+ return FALSE;
+ p = line;
+ }
+ }
+
+ // Append the original line
+ mch_memmove(p, ml_get_curline(), (size_t)line_len);
+
+ // Replace the line
+ ml_replace(curwin->w_cursor.lnum, line, FALSE);
+
+ // Put the cursor after the indent.
+ curwin->w_cursor.col = ind_len;
+ return TRUE;
+}
+
+/*
+ * open_line: Add a new line below or above the current line.
+ *
+ * For VREPLACE mode, we only add a new line when we get to the end of the
+ * file, otherwise we just start replacing the next line.
+ *
+ * Caller must take care of undo. Since VREPLACE may affect any number of
+ * lines however, it may call u_save_cursor() again when starting to change a
+ * new line.
+ * "flags": OPENLINE_DELSPACES delete spaces after cursor
+ * OPENLINE_DO_COM format comments
+ * OPENLINE_KEEPTRAIL keep trailing spaces
+ * OPENLINE_MARKFIX adjust mark positions after the line break
+ * OPENLINE_COM_LIST format comments with list or 2nd line indent
+ *
+ * "second_line_indent": indent for after ^^D in Insert mode or if flag
+ * OPENLINE_COM_LIST
+ *
+ * Return OK for success, FAIL for failure
+ */
+ int
+open_line(
+ int dir, // FORWARD or BACKWARD
+ int flags,
+ int second_line_indent)
+{
+ char_u *saved_line; // copy of the original line
+ char_u *next_line = NULL; // copy of the next line
+ char_u *p_extra = NULL; // what goes to next line
+ int less_cols = 0; // less columns for mark in new line
+ int less_cols_off = 0; // columns to skip for mark adjust
+ pos_T old_cursor; // old cursor position
+ int newcol = 0; // new cursor column
+ int newindent = 0; // auto-indent of the new line
+ int n;
+ int trunc_line = FALSE; // truncate current line afterwards
+ int retval = FAIL; // return value
+#ifdef FEAT_COMMENTS
+ int extra_len = 0; // length of p_extra string
+ int lead_len; // length of comment leader
+ char_u *lead_flags; // position in 'comments' for comment leader
+ char_u *leader = NULL; // copy of comment leader
+#endif
+ char_u *allocated = NULL; // allocated memory
+ char_u *p;
+ int saved_char = NUL; // init for GCC
+#if defined(FEAT_SMARTINDENT) || defined(FEAT_COMMENTS)
+ pos_T *pos;
+#endif
+#ifdef FEAT_SMARTINDENT
+ int do_si = (!p_paste && curbuf->b_p_si
+# ifdef FEAT_CINDENT
+ && !curbuf->b_p_cin
+# endif
+# ifdef FEAT_EVAL
+ && *curbuf->b_p_inde == NUL
+# endif
+ );
+ int no_si = FALSE; // reset did_si afterwards
+ int first_char = NUL; // init for GCC
+#endif
+#if defined(FEAT_LISP) || defined(FEAT_CINDENT)
+ int vreplace_mode;
+#endif
+ int did_append; // appended a new line
+ int saved_pi = curbuf->b_p_pi; // copy of preserveindent setting
+
+ // make a copy of the current line so we can mess with it
+ saved_line = vim_strsave(ml_get_curline());
+ if (saved_line == NULL) /* out of memory! */
+ return FALSE;
+
+ if (State & VREPLACE_FLAG)
+ {
+ // With VREPLACE we make a copy of the next line, which we will be
+ // starting to replace. First make the new line empty and let vim play
+ // with the indenting and comment leader to its heart's content. Then
+ // we grab what it ended up putting on the new line, put back the
+ // original line, and call ins_char() to put each new character onto
+ // the line, replacing what was there before and pushing the right
+ // stuff onto the replace stack. -- webb.
+ if (curwin->w_cursor.lnum < orig_line_count)
+ next_line = vim_strsave(ml_get(curwin->w_cursor.lnum + 1));
+ else
+ next_line = vim_strsave((char_u *)"");
+ if (next_line == NULL) // out of memory!
+ goto theend;
+
+ // In VREPLACE mode, a NL replaces the rest of the line, and starts
+ // replacing the next line, so push all of the characters left on the
+ // line onto the replace stack. We'll push any other characters that
+ // might be replaced at the start of the next line (due to autoindent
+ // etc) a bit later.
+ replace_push(NUL); // Call twice because BS over NL expects it
+ replace_push(NUL);
+ p = saved_line + curwin->w_cursor.col;
+ while (*p != NUL)
+ {
+ if (has_mbyte)
+ p += replace_push_mb(p);
+ else
+ replace_push(*p++);
+ }
+ saved_line[curwin->w_cursor.col] = NUL;
+ }
+
+ if ((State & INSERT) && !(State & VREPLACE_FLAG))
+ {
+ p_extra = saved_line + curwin->w_cursor.col;
+#ifdef FEAT_SMARTINDENT
+ if (do_si) // need first char after new line break
+ {
+ p = skipwhite(p_extra);
+ first_char = *p;
+ }
+#endif
+#ifdef FEAT_COMMENTS
+ extra_len = (int)STRLEN(p_extra);
+#endif
+ saved_char = *p_extra;
+ *p_extra = NUL;
+ }
+
+ u_clearline(); // cannot do "U" command when adding lines
+#ifdef FEAT_SMARTINDENT
+ did_si = FALSE;
+#endif
+ ai_col = 0;
+
+ // If we just did an auto-indent, then we didn't type anything on
+ // the prior line, and it should be truncated. Do this even if 'ai' is not
+ // set because automatically inserting a comment leader also sets did_ai.
+ if (dir == FORWARD && did_ai)
+ trunc_line = TRUE;
+
+ // If 'autoindent' and/or 'smartindent' is set, try to figure out what
+ // indent to use for the new line.
+ if (curbuf->b_p_ai
+#ifdef FEAT_SMARTINDENT
+ || do_si
+#endif
+ )
+ {
+ // count white space on current line
+#ifdef FEAT_VARTABS
+ newindent = get_indent_str_vtab(saved_line, curbuf->b_p_ts,
+ curbuf->b_p_vts_array, FALSE);
+#else
+ newindent = get_indent_str(saved_line, (int)curbuf->b_p_ts, FALSE);
+#endif
+ if (newindent == 0 && !(flags & OPENLINE_COM_LIST))
+ newindent = second_line_indent; // for ^^D command in insert mode
+
+#ifdef FEAT_SMARTINDENT
+ // Do smart indenting.
+ // In insert/replace mode (only when dir == FORWARD)
+ // we may move some text to the next line. If it starts with '{'
+ // don't add an indent. Fixes inserting a NL before '{' in line
+ // "if (condition) {"
+ if (!trunc_line && do_si && *saved_line != NUL
+ && (p_extra == NULL || first_char != '{'))
+ {
+ char_u *ptr;
+ char_u last_char;
+
+ old_cursor = curwin->w_cursor;
+ ptr = saved_line;
+# ifdef FEAT_COMMENTS
+ if (flags & OPENLINE_DO_COM)
+ lead_len = get_leader_len(ptr, NULL, FALSE, TRUE);
+ else
+ lead_len = 0;
+# endif
+ if (dir == FORWARD)
+ {
+ // Skip preprocessor directives, unless they are
+ // recognised as comments.
+ if (
+# ifdef FEAT_COMMENTS
+ lead_len == 0 &&
+# endif
+ ptr[0] == '#')
+ {
+ while (ptr[0] == '#' && curwin->w_cursor.lnum > 1)
+ ptr = ml_get(--curwin->w_cursor.lnum);
+ newindent = get_indent();
+ }
+# ifdef FEAT_COMMENTS
+ if (flags & OPENLINE_DO_COM)
+ lead_len = get_leader_len(ptr, NULL, FALSE, TRUE);
+ else
+ lead_len = 0;
+ if (lead_len > 0)
+ {
+ // This case gets the following right:
+ // /*
+ // * A comment (read '\' as '/').
+ // */
+ // #define IN_THE_WAY
+ // This should line up here;
+ p = skipwhite(ptr);
+ if (p[0] == '/' && p[1] == '*')
+ p++;
+ if (p[0] == '*')
+ {
+ for (p++; *p; p++)
+ {
+ if (p[0] == '/' && p[-1] == '*')
+ {
+ // End of C comment, indent should line up
+ // with the line containing the start of
+ // the comment
+ curwin->w_cursor.col = (colnr_T)(p - ptr);
+ if ((pos = findmatch(NULL, NUL)) != NULL)
+ {
+ curwin->w_cursor.lnum = pos->lnum;
+ newindent = get_indent();
+ }
+ }
+ }
+ }
+ }
+ else // Not a comment line
+# endif
+ {
+ // Find last non-blank in line
+ p = ptr + STRLEN(ptr) - 1;
+ while (p > ptr && VIM_ISWHITE(*p))
+ --p;
+ last_char = *p;
+
+ // find the character just before the '{' or ';'
+ if (last_char == '{' || last_char == ';')
+ {
+ if (p > ptr)
+ --p;
+ while (p > ptr && VIM_ISWHITE(*p))
+ --p;
+ }
+ // Try to catch lines that are split over multiple
+ // lines. eg:
+ // if (condition &&
+ // condition) {
+ // Should line up here!
+ // }
+ if (*p == ')')
+ {
+ curwin->w_cursor.col = (colnr_T)(p - ptr);
+ if ((pos = findmatch(NULL, '(')) != NULL)
+ {
+ curwin->w_cursor.lnum = pos->lnum;
+ newindent = get_indent();
+ ptr = ml_get_curline();
+ }
+ }
+ // If last character is '{' do indent, without
+ // checking for "if" and the like.
+ if (last_char == '{')
+ {
+ did_si = TRUE; // do indent
+ no_si = TRUE; // don't delete it when '{' typed
+ }
+ // Look for "if" and the like, use 'cinwords'.
+ // Don't do this if the previous line ended in ';' or
+ // '}'.
+ else if (last_char != ';' && last_char != '}'
+ && cin_is_cinword(ptr))
+ did_si = TRUE;
+ }
+ }
+ else // dir == BACKWARD
+ {
+ // Skip preprocessor directives, unless they are
+ // recognised as comments.
+ if (
+# ifdef FEAT_COMMENTS
+ lead_len == 0 &&
+# endif
+ ptr[0] == '#')
+ {
+ int was_backslashed = FALSE;
+
+ while ((ptr[0] == '#' || was_backslashed) &&
+ curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
+ {
+ if (*ptr && ptr[STRLEN(ptr) - 1] == '\\')
+ was_backslashed = TRUE;
+ else
+ was_backslashed = FALSE;
+ ptr = ml_get(++curwin->w_cursor.lnum);
+ }
+ if (was_backslashed)
+ newindent = 0; // Got to end of file
+ else
+ newindent = get_indent();
+ }
+ p = skipwhite(ptr);
+ if (*p == '}') // if line starts with '}': do indent
+ did_si = TRUE;
+ else // can delete indent when '{' typed
+ can_si_back = TRUE;
+ }
+ curwin->w_cursor = old_cursor;
+ }
+ if (do_si)
+ can_si = TRUE;
+#endif // FEAT_SMARTINDENT
+
+ did_ai = TRUE;
+ }
+
+#ifdef FEAT_COMMENTS
+ // Find out if the current line starts with a comment leader.
+ // This may then be inserted in front of the new line.
+ end_comment_pending = NUL;
+ if (flags & OPENLINE_DO_COM)
+ lead_len = get_leader_len(saved_line, &lead_flags,
+ dir == BACKWARD, TRUE);
+ else
+ lead_len = 0;
+ if (lead_len > 0)
+ {
+ char_u *lead_repl = NULL; // replaces comment leader
+ int lead_repl_len = 0; // length of *lead_repl
+ char_u lead_middle[COM_MAX_LEN]; // middle-comment string
+ char_u lead_end[COM_MAX_LEN]; // end-comment string
+ char_u *comment_end = NULL; // where lead_end has been found
+ int extra_space = FALSE; // append extra space
+ int current_flag;
+ int require_blank = FALSE; // requires blank after middle
+ char_u *p2;
+
+ // If the comment leader has the start, middle or end flag, it may not
+ // be used or may be replaced with the middle leader.
+ for (p = lead_flags; *p && *p != ':'; ++p)
+ {
+ if (*p == COM_BLANK)
+ {
+ require_blank = TRUE;
+ continue;
+ }
+ if (*p == COM_START || *p == COM_MIDDLE)
+ {
+ current_flag = *p;
+ if (*p == COM_START)
+ {
+ // Doing "O" on a start of comment does not insert leader.
+ if (dir == BACKWARD)
+ {
+ lead_len = 0;
+ break;
+ }
+
+ // find start of middle part
+ (void)copy_option_part(&p, lead_middle, COM_MAX_LEN, ",");
+ require_blank = FALSE;
+ }
+
+ // Isolate the strings of the middle and end leader.
+ while (*p && p[-1] != ':') /* find end of middle flags */
+ {
+ if (*p == COM_BLANK)
+ require_blank = TRUE;
+ ++p;
+ }
+ (void)copy_option_part(&p, lead_middle, COM_MAX_LEN, ",");
+
+ while (*p && p[-1] != ':') // find end of end flags
+ {
+ // Check whether we allow automatic ending of comments
+ if (*p == COM_AUTO_END)
+ end_comment_pending = -1; // means we want to set it
+ ++p;
+ }
+ n = copy_option_part(&p, lead_end, COM_MAX_LEN, ",");
+
+ if (end_comment_pending == -1) // we can set it now
+ end_comment_pending = lead_end[n - 1];
+
+ // If the end of the comment is in the same line, don't use
+ // the comment leader.
+ if (dir == FORWARD)
+ {
+ for (p = saved_line + lead_len; *p; ++p)
+ if (STRNCMP(p, lead_end, n) == 0)
+ {
+ comment_end = p;
+ lead_len = 0;
+ break;
+ }
+ }
+
+ // Doing "o" on a start of comment inserts the middle leader.
+ if (lead_len > 0)
+ {
+ if (current_flag == COM_START)
+ {
+ lead_repl = lead_middle;
+ lead_repl_len = (int)STRLEN(lead_middle);
+ }
+
+ // If we have hit RETURN immediately after the start
+ // comment leader, then put a space after the middle
+ // comment leader on the next line.
+ if (!VIM_ISWHITE(saved_line[lead_len - 1])
+ && ((p_extra != NULL
+ && (int)curwin->w_cursor.col == lead_len)
+ || (p_extra == NULL
+ && saved_line[lead_len] == NUL)
+ || require_blank))
+ extra_space = TRUE;
+ }
+ break;
+ }
+ if (*p == COM_END)
+ {
+ // Doing "o" on the end of a comment does not insert leader.
+ // Remember where the end is, might want to use it to find the
+ // start (for C-comments).
+ if (dir == FORWARD)
+ {
+ comment_end = skipwhite(saved_line);
+ lead_len = 0;
+ break;
+ }
+
+ // Doing "O" on the end of a comment inserts the middle leader.
+ // Find the string for the middle leader, searching backwards.
+ while (p > curbuf->b_p_com && *p != ',')
+ --p;
+ for (lead_repl = p; lead_repl > curbuf->b_p_com
+ && lead_repl[-1] != ':'; --lead_repl)
+ ;
+ lead_repl_len = (int)(p - lead_repl);
+
+ // We can probably always add an extra space when doing "O" on
+ // the comment-end
+ extra_space = TRUE;
+
+ // Check whether we allow automatic ending of comments
+ for (p2 = p; *p2 && *p2 != ':'; p2++)
+ {
+ if (*p2 == COM_AUTO_END)
+ end_comment_pending = -1; // means we want to set it
+ }
+ if (end_comment_pending == -1)
+ {
+ // Find last character in end-comment string
+ while (*p2 && *p2 != ',')
+ p2++;
+ end_comment_pending = p2[-1];
+ }
+ break;
+ }
+ if (*p == COM_FIRST)
+ {
+ // Comment leader for first line only: Don't repeat leader
+ // when using "O", blank out leader when using "o".
+ if (dir == BACKWARD)
+ lead_len = 0;
+ else
+ {
+ lead_repl = (char_u *)"";
+ lead_repl_len = 0;
+ }
+ break;
+ }
+ }
+ if (lead_len)
+ {
+ // allocate buffer (may concatenate p_extra later)
+ leader = alloc(lead_len + lead_repl_len + extra_space + extra_len
+ + (second_line_indent > 0 ? second_line_indent : 0) + 1);
+ allocated = leader; // remember to free it later
+
+ if (leader == NULL)
+ lead_len = 0;
+ else
+ {
+ vim_strncpy(leader, saved_line, lead_len);
+
+ // Replace leader with lead_repl, right or left adjusted
+ if (lead_repl != NULL)
+ {
+ int c = 0;
+ int off = 0;
+
+ for (p = lead_flags; *p != NUL && *p != ':'; )
+ {
+ if (*p == COM_RIGHT || *p == COM_LEFT)
+ c = *p++;
+ else if (VIM_ISDIGIT(*p) || *p == '-')
+ off = getdigits(&p);
+ else
+ ++p;
+ }
+ if (c == COM_RIGHT) // right adjusted leader
+ {
+ // find last non-white in the leader to line up with
+ for (p = leader + lead_len - 1; p > leader
+ && VIM_ISWHITE(*p); --p)
+ ;
+ ++p;
+
+ // Compute the length of the replaced characters in
+ // screen characters, not bytes.
+ {
+ int repl_size = vim_strnsize(lead_repl,
+ lead_repl_len);
+ int old_size = 0;
+ char_u *endp = p;
+ int l;
+
+ while (old_size < repl_size && p > leader)
+ {
+ MB_PTR_BACK(leader, p);
+ old_size += ptr2cells(p);
+ }
+ l = lead_repl_len - (int)(endp - p);
+ if (l != 0)
+ mch_memmove(endp + l, endp,
+ (size_t)((leader + lead_len) - endp));
+ lead_len += l;
+ }
+ mch_memmove(p, lead_repl, (size_t)lead_repl_len);
+ if (p + lead_repl_len > leader + lead_len)
+ p[lead_repl_len] = NUL;
+
+ // blank-out any other chars from the old leader.
+ while (--p >= leader)
+ {
+ int l = mb_head_off(leader, p);
+
+ if (l > 1)
+ {
+ p -= l;
+ if (ptr2cells(p) > 1)
+ {
+ p[1] = ' ';
+ --l;
+ }
+ mch_memmove(p + 1, p + l + 1,
+ (size_t)((leader + lead_len) - (p + l + 1)));
+ lead_len -= l;
+ *p = ' ';
+ }
+ else if (!VIM_ISWHITE(*p))
+ *p = ' ';
+ }
+ }
+ else // left adjusted leader
+ {
+ p = skipwhite(leader);
+
+ // Compute the length of the replaced characters in
+ // screen characters, not bytes. Move the part that is
+ // not to be overwritten.
+ {
+ int repl_size = vim_strnsize(lead_repl,
+ lead_repl_len);
+ int i;
+ int l;
+
+ for (i = 0; i < lead_len && p[i] != NUL; i += l)
+ {
+ l = (*mb_ptr2len)(p + i);
+ if (vim_strnsize(p, i + l) > repl_size)
+ break;
+ }
+ if (i != lead_repl_len)
+ {
+ mch_memmove(p + lead_repl_len, p + i,
+ (size_t)(lead_len - i - (p - leader)));
+ lead_len += lead_repl_len - i;
+ }
+ }
+ mch_memmove(p, lead_repl, (size_t)lead_repl_len);
+
+ // Replace any remaining non-white chars in the old
+ // leader by spaces. Keep Tabs, the indent must
+ // remain the same.
+ for (p += lead_repl_len; p < leader + lead_len; ++p)
+ if (!VIM_ISWHITE(*p))
+ {
+ // Don't put a space before a TAB.
+ if (p + 1 < leader + lead_len && p[1] == TAB)
+ {
+ --lead_len;
+ mch_memmove(p, p + 1,
+ (leader + lead_len) - p);
+ }
+ else
+ {
+ int l = (*mb_ptr2len)(p);
+
+ if (l > 1)
+ {
+ if (ptr2cells(p) > 1)
+ {
+ // Replace a double-wide char with
+ // two spaces
+ --l;
+ *p++ = ' ';
+ }
+ mch_memmove(p + 1, p + l,
+ (leader + lead_len) - p);
+ lead_len -= l - 1;
+ }
+ *p = ' ';
+ }
+ }
+ *p = NUL;
+ }
+
+ // Recompute the indent, it may have changed.
+ if (curbuf->b_p_ai
+#ifdef FEAT_SMARTINDENT
+ || do_si
+#endif
+ )
+#ifdef FEAT_VARTABS
+ newindent = get_indent_str_vtab(leader, curbuf->b_p_ts,
+ curbuf->b_p_vts_array, FALSE);
+#else
+ newindent = get_indent_str(leader,
+ (int)curbuf->b_p_ts, FALSE);
+#endif
+
+ // Add the indent offset
+ if (newindent + off < 0)
+ {
+ off = -newindent;
+ newindent = 0;
+ }
+ else
+ newindent += off;
+
+ // Correct trailing spaces for the shift, so that
+ // alignment remains equal.
+ while (off > 0 && lead_len > 0
+ && leader[lead_len - 1] == ' ')
+ {
+ // Don't do it when there is a tab before the space
+ if (vim_strchr(skipwhite(leader), '\t') != NULL)
+ break;
+ --lead_len;
+ --off;
+ }
+
+ // If the leader ends in white space, don't add an
+ // extra space
+ if (lead_len > 0 && VIM_ISWHITE(leader[lead_len - 1]))
+ extra_space = FALSE;
+ leader[lead_len] = NUL;
+ }
+
+ if (extra_space)
+ {
+ leader[lead_len++] = ' ';
+ leader[lead_len] = NUL;
+ }
+
+ newcol = lead_len;
+
+ // if a new indent will be set below, remove the indent that
+ // is in the comment leader
+ if (newindent
+#ifdef FEAT_SMARTINDENT
+ || did_si
+#endif
+ )
+ {
+ while (lead_len && VIM_ISWHITE(*leader))
+ {
+ --lead_len;
+ --newcol;
+ ++leader;
+ }
+ }
+
+ }
+#ifdef FEAT_SMARTINDENT
+ did_si = can_si = FALSE;
+#endif
+ }
+ else if (comment_end != NULL)
+ {
+ // We have finished a comment, so we don't use the leader.
+ // If this was a C-comment and 'ai' or 'si' is set do a normal
+ // indent to align with the line containing the start of the
+ // comment.
+ if (comment_end[0] == '*' && comment_end[1] == '/' &&
+ (curbuf->b_p_ai
+#ifdef FEAT_SMARTINDENT
+ || do_si
+#endif
+ ))
+ {
+ old_cursor = curwin->w_cursor;
+ curwin->w_cursor.col = (colnr_T)(comment_end - saved_line);
+ if ((pos = findmatch(NULL, NUL)) != NULL)
+ {
+ curwin->w_cursor.lnum = pos->lnum;
+ newindent = get_indent();
+ }
+ curwin->w_cursor = old_cursor;
+ }
+ }
+ }
+#endif
+
+ // (State == INSERT || State == REPLACE), only when dir == FORWARD
+ if (p_extra != NULL)
+ {
+ *p_extra = saved_char; // restore char that NUL replaced
+
+ // When 'ai' set or "flags" has OPENLINE_DELSPACES, skip to the first
+ // non-blank.
+ //
+ // When in REPLACE mode, put the deleted blanks on the replace stack,
+ // preceded by a NUL, so they can be put back when a BS is entered.
+ if (REPLACE_NORMAL(State))
+ replace_push(NUL); /* end of extra blanks */
+ if (curbuf->b_p_ai || (flags & OPENLINE_DELSPACES))
+ {
+ while ((*p_extra == ' ' || *p_extra == '\t')
+ && (!enc_utf8
+ || !utf_iscomposing(utf_ptr2char(p_extra + 1))))
+ {
+ if (REPLACE_NORMAL(State))
+ replace_push(*p_extra);
+ ++p_extra;
+ ++less_cols_off;
+ }
+ }
+
+ // columns for marks adjusted for removed columns
+ less_cols = (int)(p_extra - saved_line);
+ }
+
+ if (p_extra == NULL)
+ p_extra = (char_u *)""; // append empty line
+
+#ifdef FEAT_COMMENTS
+ // concatenate leader and p_extra, if there is a leader
+ if (lead_len)
+ {
+ if (flags & OPENLINE_COM_LIST && second_line_indent > 0)
+ {
+ int i;
+ int padding = second_line_indent
+ - (newindent + (int)STRLEN(leader));
+
+ // Here whitespace is inserted after the comment char.
+ // Below, set_indent(newindent, SIN_INSERT) will insert the
+ // whitespace needed before the comment char.
+ for (i = 0; i < padding; i++)
+ {
+ STRCAT(leader, " ");
+ less_cols--;
+ newcol++;
+ }
+ }
+ STRCAT(leader, p_extra);
+ p_extra = leader;
+ did_ai = TRUE; // So truncating blanks works with comments
+ less_cols -= lead_len;
+ }
+ else
+ end_comment_pending = NUL; // turns out there was no leader
+#endif
+
+ old_cursor = curwin->w_cursor;
+ if (dir == BACKWARD)
+ --curwin->w_cursor.lnum;
+ if (!(State & VREPLACE_FLAG) || old_cursor.lnum >= orig_line_count)
+ {
+ if (ml_append(curwin->w_cursor.lnum, p_extra, (colnr_T)0, FALSE)
+ == FAIL)
+ goto theend;
+ // Postpone calling changed_lines(), because it would mess up folding
+ // with markers.
+ // Skip mark_adjust when adding a line after the last one, there can't
+ // be marks there. But still needed in diff mode.
+ if (curwin->w_cursor.lnum + 1 < curbuf->b_ml.ml_line_count
+#ifdef FEAT_DIFF
+ || curwin->w_p_diff
+#endif
+ )
+ mark_adjust(curwin->w_cursor.lnum + 1, (linenr_T)MAXLNUM, 1L, 0L);
+ did_append = TRUE;
+ }
+ else
+ {
+ // In VREPLACE mode we are starting to replace the next line.
+ curwin->w_cursor.lnum++;
+ if (curwin->w_cursor.lnum >= Insstart.lnum + vr_lines_changed)
+ {
+ // In case we NL to a new line, BS to the previous one, and NL
+ // again, we don't want to save the new line for undo twice.
+ (void)u_save_cursor(); /* errors are ignored! */
+ vr_lines_changed++;
+ }
+ ml_replace(curwin->w_cursor.lnum, p_extra, TRUE);
+ changed_bytes(curwin->w_cursor.lnum, 0);
+ curwin->w_cursor.lnum--;
+ did_append = FALSE;
+ }
+
+ if (newindent
+#ifdef FEAT_SMARTINDENT
+ || did_si
+#endif
+ )
+ {
+ ++curwin->w_cursor.lnum;
+#ifdef FEAT_SMARTINDENT
+ if (did_si)
+ {
+ int sw = (int)get_sw_value(curbuf);
+
+ if (p_sr)
+ newindent -= newindent % sw;
+ newindent += sw;
+ }
+#endif
+ // Copy the indent
+ if (curbuf->b_p_ci)
+ {
+ (void)copy_indent(newindent, saved_line);
+
+ // Set the 'preserveindent' option so that any further screwing
+ // with the line doesn't entirely destroy our efforts to preserve
+ // it. It gets restored at the function end.
+ curbuf->b_p_pi = TRUE;
+ }
+ else
+ (void)set_indent(newindent, SIN_INSERT);
+ less_cols -= curwin->w_cursor.col;
+
+ ai_col = curwin->w_cursor.col;
+
+ // In REPLACE mode, for each character in the new indent, there must
+ // be a NUL on the replace stack, for when it is deleted with BS
+ if (REPLACE_NORMAL(State))
+ for (n = 0; n < (int)curwin->w_cursor.col; ++n)
+ replace_push(NUL);
+ newcol += curwin->w_cursor.col;
+#ifdef FEAT_SMARTINDENT
+ if (no_si)
+ did_si = FALSE;
+#endif
+ }
+
+#ifdef FEAT_COMMENTS
+ // In REPLACE mode, for each character in the extra leader, there must be
+ // a NUL on the replace stack, for when it is deleted with BS.
+ if (REPLACE_NORMAL(State))
+ while (lead_len-- > 0)
+ replace_push(NUL);
+#endif
+
+ curwin->w_cursor = old_cursor;
+
+ if (dir == FORWARD)
+ {
+ if (trunc_line || (State & INSERT))
+ {
+ // truncate current line at cursor
+ saved_line[curwin->w_cursor.col] = NUL;
+ // Remove trailing white space, unless OPENLINE_KEEPTRAIL used.
+ if (trunc_line && !(flags & OPENLINE_KEEPTRAIL))
+ truncate_spaces(saved_line);
+ ml_replace(curwin->w_cursor.lnum, saved_line, FALSE);
+ saved_line = NULL;
+ if (did_append)
+ {
+ changed_lines(curwin->w_cursor.lnum, curwin->w_cursor.col,
+ curwin->w_cursor.lnum + 1, 1L);
+ did_append = FALSE;
+
+ // Move marks after the line break to the new line.
+ if (flags & OPENLINE_MARKFIX)
+ mark_col_adjust(curwin->w_cursor.lnum,
+ curwin->w_cursor.col + less_cols_off,
+ 1L, (long)-less_cols, 0);
+ }
+ else
+ changed_bytes(curwin->w_cursor.lnum, curwin->w_cursor.col);
+ }
+
+ // Put the cursor on the new line. Careful: the scrollup() above may
+ // have moved w_cursor, we must use old_cursor.
+ curwin->w_cursor.lnum = old_cursor.lnum + 1;
+ }
+ if (did_append)
+ changed_lines(curwin->w_cursor.lnum, 0, curwin->w_cursor.lnum, 1L);
+
+ curwin->w_cursor.col = newcol;
+ curwin->w_cursor.coladd = 0;
+
+#if defined(FEAT_LISP) || defined(FEAT_CINDENT)
+ // In VREPLACE mode, we are handling the replace stack ourselves, so stop
+ // fixthisline() from doing it (via change_indent()) by telling it we're in
+ // normal INSERT mode.
+ if (State & VREPLACE_FLAG)
+ {
+ vreplace_mode = State; // So we know to put things right later
+ State = INSERT;
+ }
+ else
+ vreplace_mode = 0;
+#endif
+#ifdef FEAT_LISP
+ // May do lisp indenting.
+ if (!p_paste
+# ifdef FEAT_COMMENTS
+ && leader == NULL
+# endif
+ && curbuf->b_p_lisp
+ && curbuf->b_p_ai)
+ {
+ fixthisline(get_lisp_indent);
+ ai_col = (colnr_T)getwhitecols_curline();
+ }
+#endif
+#ifdef FEAT_CINDENT
+ // May do indenting after opening a new line.
+ if (!p_paste
+ && (curbuf->b_p_cin
+# ifdef FEAT_EVAL
+ || *curbuf->b_p_inde != NUL
+# endif
+ )
+ && in_cinkeys(dir == FORWARD
+ ? KEY_OPEN_FORW
+ : KEY_OPEN_BACK, ' ', linewhite(curwin->w_cursor.lnum)))
+ {
+ do_c_expr_indent();
+ ai_col = (colnr_T)getwhitecols_curline();
+ }
+#endif
+#if defined(FEAT_LISP) || defined(FEAT_CINDENT)
+ if (vreplace_mode != 0)
+ State = vreplace_mode;
+#endif
+
+ // Finally, VREPLACE gets the stuff on the new line, then puts back the
+ // original line, and inserts the new stuff char by char, pushing old stuff
+ // onto the replace stack (via ins_char()).
+ if (State & VREPLACE_FLAG)
+ {
+ // Put new line in p_extra
+ p_extra = vim_strsave(ml_get_curline());
+ if (p_extra == NULL)
+ goto theend;
+
+ // Put back original line
+ ml_replace(curwin->w_cursor.lnum, next_line, FALSE);
+
+ // Insert new stuff into line again
+ curwin->w_cursor.col = 0;
+ curwin->w_cursor.coladd = 0;
+ ins_bytes(p_extra); // will call changed_bytes()
+ vim_free(p_extra);
+ next_line = NULL;
+ }
+
+ retval = OK; // success!
+theend:
+ curbuf->b_p_pi = saved_pi;
+ vim_free(saved_line);
+ vim_free(next_line);
+ vim_free(allocated);
+ return retval;
+}
+
+/*
+ * Delete from cursor to end of line.
+ * Caller must have prepared for undo.
+ * If "fixpos" is TRUE fix the cursor position when done.
+ *
+ * Return FAIL for failure, OK otherwise.
+ */
+ int
+truncate_line(int fixpos)
+{
+ char_u *newp;
+ linenr_T lnum = curwin->w_cursor.lnum;
+ colnr_T col = curwin->w_cursor.col;
+
+ if (col == 0)
+ newp = vim_strsave((char_u *)"");
+ else
+ newp = vim_strnsave(ml_get(lnum), col);
+
+ if (newp == NULL)
+ return FAIL;
+
+ ml_replace(lnum, newp, FALSE);
+
+ // mark the buffer as changed and prepare for displaying
+ changed_bytes(lnum, curwin->w_cursor.col);
+
+ // If "fixpos" is TRUE we don't want to end up positioned at the NUL.
+ if (fixpos && curwin->w_cursor.col > 0)
+ --curwin->w_cursor.col;
+
+ return OK;
+}
+
+/*
+ * Delete "nlines" lines at the cursor.
+ * Saves the lines for undo first if "undo" is TRUE.
+ */
+ void
+del_lines(long nlines, int undo)
+{
+ long n;
+ linenr_T first = curwin->w_cursor.lnum;
+
+ if (nlines <= 0)
+ return;
+
+ // save the deleted lines for undo
+ if (undo && u_savedel(first, nlines) == FAIL)
+ return;
+
+ for (n = 0; n < nlines; )
+ {
+ if (curbuf->b_ml.ml_flags & ML_EMPTY) // nothing to delete
+ break;
+
+ ml_delete(first, TRUE);
+ ++n;
+
+ // If we delete the last line in the file, stop
+ if (first > curbuf->b_ml.ml_line_count)
+ break;
+ }
+
+ // Correct the cursor position before calling deleted_lines_mark(), it may
+ // trigger a callback to display the cursor.
+ curwin->w_cursor.col = 0;
+ check_cursor_lnum();
+
+ // adjust marks, mark the buffer as changed and prepare for displaying
+ deleted_lines_mark(first, n);
+}
projects / vim / commitdiff