diff options
Diffstat (limited to 'src/nvim/change.c')
| -rw-r--r-- | src/nvim/change.c | 1798 |
1 files changed, 1798 insertions, 0 deletions
diff --git a/src/nvim/change.c b/src/nvim/change.c new file mode 100644 index 0000000000..2363578139 --- /dev/null +++ b/src/nvim/change.c @@ -0,0 +1,1798 @@ +// This is an open source non-commercial project. Dear PVS-Studio, please check +// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com + +/// change.c: functions related to changing text + +#include "nvim/assert.h" +#include "nvim/buffer.h" +#include "nvim/buffer_updates.h" +#include "nvim/change.h" +#include "nvim/charset.h" +#include "nvim/cursor.h" +#include "nvim/diff.h" +#include "nvim/edit.h" +#include "nvim/eval.h" +#include "nvim/fileio.h" +#include "nvim/fold.h" +#include "nvim/indent.h" +#include "nvim/indent_c.h" +#include "nvim/mark.h" +#include "nvim/memline.h" +#include "nvim/misc1.h" +#include "nvim/move.h" +#include "nvim/option.h" +#include "nvim/screen.h" +#include "nvim/search.h" +#include "nvim/state.h" +#include "nvim/ui.h" +#include "nvim/undo.h" + +#ifdef INCLUDE_GENERATED_DECLARATIONS +# include "change.c.generated.h" +#endif + +/// 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_ext_set_kind("wmsg"); + MSG_PUTS_ATTR(_(w_readonly), HL_ATTR(HLF_W) | MSG_HIST); + set_vim_var_string(VV_WARNINGMSG, _(w_readonly), -1); + msg_clr_eos(); + (void)msg_end(); + if (msg_silent == 0 && !silent_mode && ui_active()) { + ui_flush(); + os_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 (!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 + && !bt_dontwrite(curbuf) + ) { + 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) { + ui_flush(); + os_delay(2000L, true); + wait_return(true); + msg_scroll = save_msg_scroll; + } else { + need_wait_return = save_need_wait_return; + } + } + changed_internal(); + } + buf_inc_changedtick(curbuf); + + // If a pattern is highlighted, the position may now be invalid. + highlight_match = false; +} + +/// 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; + need_maketitle = true; // set window title later +} + +/// 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) +{ + int i; + int cols; + pos_T *p; + int add; + + // mark the buffer as modified + changed(); + + if (curwin->w_p_diff && diff_internal()) { + curtab->tp_diff_update = true; + } + + // set the '. mark + if (!cmdmod.keepjumps) { + RESET_FMARK(&curbuf->b_last_change, ((pos_T) { lnum, col, 0 }), 0); + + // 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].mark; + 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; + memmove(curbuf->b_changelist, curbuf->b_changelist + 1, + sizeof(curbuf->b_changelist[0]) * (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; + } + + 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. + // 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. */ + bool folded = hasFoldingWin(wp, lnum, &lnum, NULL, false, NULL); + if (wp->w_cursor.lnum == lnum) { + wp->w_cline_folded = folded; + } + folded = hasFoldingWin(wp, lnume, NULL, &lnume, false, NULL); + if (wp->w_cursor.lnum == lnume) { + wp->w_cline_folded = folded; + } + + // 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); + } + } + + 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; + wp->w_lines[i].wl_lastlnum += xtra; + } + } 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; + } + } + } + + // 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); + } + + // 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) { + curwin->w_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); + // notify any channels that are watching + buf_updates_send_changes(curbuf, lnum, 1, 1, true); + + // Diff highlighting in other diff windows may need to be updated too. + if (curwin->w_p_diff) { + linenr_T wlnum; + + FOR_ALL_WINDOWS_IN_TAB(wp, curtab) { + 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); + } + } + } + } +} + +/// 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, true); +} + +/// 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 || curwin->w_p_diff) { + mark_adjust(lnum + 1, (linenr_T)MAXLNUM, count, 0L, false); + } + changed_lines(lnum + 1, 0, lnum + 1, count, true); +} + +/// 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, true); +} + +/// 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, false); + changed_lines(lnum, 0, lnum + count, -count, true); +} + +/// Marks the area to be redrawn after a change. +/// +/// @param buf the buffer where lines were changed +/// @param lnum first line with change +/// @param lnume line below last changed line +/// @param xtra number of extra lines (negative when deleting) +void changed_lines_buf(buf_T *buf, linenr_T lnum, linenr_T lnume, long xtra) +{ + 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) + bool do_buf_event // some callers like undo/redo call changed_lines() + // and then increment changedtick *again*. This flag + // allows these callers to send the nvim_buf_lines_event + // events after they're done modifying changedtick. +) +{ + changed_lines_buf(curbuf, lnum, lnume, xtra); + + 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. + linenr_T wlnum; + + FOR_ALL_WINDOWS_IN_TAB(wp, curtab) { + 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); + } + } + } + } + + changed_common(lnum, col, lnume, xtra); + + if (do_buf_event) { + int64_t num_added = (int64_t)(lnume + xtra - lnum); + int64_t num_removed = lnume - lnum; + buf_updates_send_changes(curbuf, lnum, num_added, num_removed, true); + } +} + +/// 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 = false; + ml_setflags(buf); + if (ff) { + save_file_ff(buf); + } + check_status(buf); + redraw_tabline = true; + need_maketitle = true; // set window title later + } + buf_inc_changedtick(buf); +} + +/// 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, 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, size_t len) +{ + size_t n; + for (size_t i = 0; i < len; i += n) { + if (enc_utf8) { + // avoid reading past p[len] + n = (size_t)utfc_ptr2len_len(p + i, (int)(len - i)); + } else { + n = (size_t)(*mb_ptr2len)(p + i); + } + ins_char_bytes(p + i, n); + } +} + +/// 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]; + size_t n = (size_t)utf_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, size_t charlen) +{ + // Break tabs if needed. + if (virtual_active() && curwin->w_cursor.coladd > 0) { + coladvance_force(getviscol()); + } + + size_t col = (size_t)curwin->w_cursor.col; + linenr_T lnum = curwin->w_cursor.lnum; + char_u *oldp = ml_get(lnum); + size_t linelen = STRLEN(oldp) + 1; // length of old line including NUL + + // The lengths default to the values for when not replacing. + size_t oldlen = 0; // nr of bytes inserted + size_t newlen = charlen; // nr of bytes deleted (0 when not replacing) + + if (State & REPLACE_FLAG) { + if (State & VREPLACE_FLAG) { + // 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. + int 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. + colnr_T vcol; + getvcol(curwin, &curwin->w_cursor, NULL, &vcol, NULL); + colnr_T 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 += (size_t)(*mb_ptr2len)(oldp + col + oldlen); + // Deleted a bit too much, insert spaces. + if (vcol > new_vcol) { + newlen += (size_t)(vcol - new_vcol); + } + } + curwin->w_p_list = old_list; + } else if (oldp[col] != NUL) { + // normal replace + oldlen = (size_t)(*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 (size_t i = 0; i < oldlen; i++) { + i += (size_t)replace_push_mb(oldp + col + i) - 1; + } + } + + char_u *newp = xmalloc((size_t)(linelen + newlen - oldlen)); + + // Copy bytes before the cursor. + if (col > 0) { + memmove(newp, oldp, (size_t)col); + } + + // Copy bytes after the changed character(s). + char_u *p = newp + col; + if (linelen > col + oldlen) { + memmove(p + newlen, oldp + col + oldlen, + (size_t)(linelen - col - oldlen)); + } + + // Insert or overwrite the new character. + memmove(p, buf, charlen); + + // Fill with spaces when necessary. + for (size_t i = charlen; i < newlen; i++) { + p[i] = ' '; + } + + // Replace the line in the buffer. + ml_replace(lnum, newp, false); + + // mark the buffer as changed and prepare for displaying + changed_bytes(lnum, (colnr_T)col); + + // 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 + && !ins_compl_active() + ) { + showmatch(utf_ptr2char(buf)); + } + + if (!p_ri || (State & REPLACE_FLAG)) { + // Normal insert: move cursor right + curwin->w_cursor.col += (int)charlen; + } + // TODO(Bram): 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 = (char_u *)xmalloc((size_t)oldlen + (size_t)newlen + 1); + if (col > 0) { + memmove(newp, oldp, (size_t)col); + } + memmove(newp + col, s, (size_t)newlen); + int bytes = oldlen - col + 1; + assert(bytes >= 0); + memmove(newp + col + newlen, oldp + col, (size_t)bytes); + ml_replace(lnum, newp, false); + changed_bytes(lnum, col); + 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(bool fixpos) +{ + // Make sure the cursor is at the start of a character. + mb_adjust_cursor(); + if (*get_cursor_pos_ptr() == NUL) { + return FAIL; + } + return del_chars(1L, fixpos); +} + +/// Like del_bytes(), but delete characters instead of bytes. +int del_chars(long count, int fixpos) +{ + int bytes = 0; + long i; + char_u *p; + int l; + + p = get_cursor_pos_ptr(); + 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. +/// +/// @param count number of bytes to be deleted +/// @param fixpos_arg leave the cursor on the NUL after the line +/// @param use_delcombine 'delcombine' option applies +/// +/// @return FAIL for failure, OK otherwise +int del_bytes(colnr_T count, bool fixpos_arg, bool use_delcombine) +{ + linenr_T lnum = curwin->w_cursor.lnum; + colnr_T col = curwin->w_cursor.col; + bool fixpos = fixpos_arg; + char_u *oldp = ml_get(lnum); + colnr_T oldlen = (colnr_T)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) { + IEMSGN("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 = false; + } + } + + // When count is too big, reduce it. + int movelen = oldlen - 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; + curwin->w_cursor.col -= utf_head_off(oldp, oldp + curwin->w_cursor.col); + } + count = oldlen - col; + movelen = 1; + } + + // If the old line has been allocated the deletion can be done in the + // existing line. Otherwise a new line has to be allocated. + bool was_alloced = ml_line_alloced(); // check if oldp was allocated + char_u *newp; + if (was_alloced) { + ml_add_deleted_len(curbuf->b_ml.ml_line_ptr, oldlen); + newp = oldp; // use same allocated memory + } else { // need to allocate a new line + newp = xmalloc((size_t)(oldlen + 1 - count)); + memmove(newp, oldp, (size_t)col); + } + memmove(newp + col, oldp + col + count, (size_t)movelen); + if (!was_alloced) { + ml_replace(lnum, newp, false); + } + + // mark the buffer as changed and prepare for displaying + changed_bytes(lnum, curwin->w_cursor.col); + + 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. +/// @return true if the line was changed. +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; + + // 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; + s = src; + + // Count/copy the usable portion of the source line. + while (todo > 0 && ascii_iswhite(*s)) { + if (*s == TAB) { + tab_pad = (int)curbuf->b_p_ts + - (ind_done % (int)curbuf->b_p_ts); + + // Stop if this tab will overshoot the target. + if (todo < tab_pad) { + break; + } + todo -= tab_pad; + ind_done += tab_pad; + } else { + todo--; + ind_done++; + } + ind_len++; + + if (p != NULL) { + *p++ = *s; + } + s++; + } + + // Fill to next tabstop with a tab, if possible. + tab_pad = (int)curbuf->b_p_ts - (ind_done % (int)curbuf->b_p_ts); + + if ((todo >= tab_pad) && !curbuf->b_p_et) { + todo -= tab_pad; + ind_len++; + + if (p != NULL) { + *p++ = TAB; + } + } + + // Add tabs required for indent. + while (todo >= (int)curbuf->b_p_ts && !curbuf->b_p_et) { + todo -= (int)curbuf->b_p_ts; + ind_len++; + + if (p != NULL) { + *p++ = TAB; + } + } + + // 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(get_cursor_line_ptr()) + 1; + assert(ind_len + line_len >= 0); + size_t line_size; + STRICT_ADD(ind_len, line_len, &line_size, size_t); + line = xmalloc(line_size); + p = line; + } + } + + // Append the original line + memmove(p, get_cursor_line_ptr(), (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 true on success, false on failure +int open_line( + int dir, // FORWARD or BACKWARD + int flags, + int second_line_indent +) +{ + char_u *next_line = NULL; // copy of the next line + char_u *p_extra = NULL; // what goes to next line + colnr_T less_cols = 0; // less columns for mark in new line + colnr_T less_cols_off = 0; // columns to skip for mark adjust + pos_T old_cursor; // old cursor position + colnr_T newcol = 0; // new cursor column + int newindent = 0; // auto-indent of the new line + bool trunc_line = false; // truncate current line afterwards + bool retval = false; // return value + 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 + char_u *allocated = NULL; // allocated memory + char_u *p; + char_u saved_char = NUL; // init for GCC + pos_T *pos; + bool do_si = (!p_paste && curbuf->b_p_si && !curbuf->b_p_cin + && *curbuf->b_p_inde == NUL); + bool no_si = false; // reset did_si afterwards + int first_char = NUL; // init for GCC + int vreplace_mode; + bool 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 + char_u *saved_line = vim_strsave(get_cursor_line_ptr()); + + 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 *)""); + } + + // 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) { + p += replace_push_mb(p); + } + saved_line[curwin->w_cursor.col] = NUL; + } + + if ((State & INSERT) + && !(State & VREPLACE_FLAG) + ) { + p_extra = saved_line + curwin->w_cursor.col; + if (do_si) { // need first char after new line break + p = skipwhite(p_extra); + first_char = *p; + } + extra_len = (int)STRLEN(p_extra); + saved_char = *p_extra; + *p_extra = NUL; + } + + u_clearline(); // cannot do "U" command when adding lines + did_si = false; + 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 + || do_si + ) { + // count white space on current line + newindent = get_indent_str(saved_line, (int)curbuf->b_p_ts, false); + if (newindent == 0 && !(flags & OPENLINE_COM_LIST)) { + newindent = second_line_indent; // for ^^D command in insert mode + } + + // 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; + if (flags & OPENLINE_DO_COM) { + lead_len = get_leader_len(ptr, NULL, false, true); + } else { + lead_len = 0; + } + if (dir == FORWARD) { + // Skip preprocessor directives, unless they are + // recognised as comments. + if (lead_len == 0 && ptr[0] == '#') { + while (ptr[0] == '#' && curwin->w_cursor.lnum > 1) { + ptr = ml_get(--curwin->w_cursor.lnum); + } + newindent = get_indent(); + } + 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 + // Find last non-blank in line + p = ptr + STRLEN(ptr) - 1; + while (p > ptr && ascii_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 && ascii_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 = get_cursor_line_ptr(); + } + } + // 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 (lead_len == 0 && ptr[0] == '#') { + bool 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; + } + + did_ai = true; + } + + // 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++; + } + size_t 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 (!ascii_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 > 0) { + // allocate buffer (may concatenate p_extra later) + int bytes = lead_len + + lead_repl_len + + extra_space + + extra_len + + (second_line_indent > 0 ? second_line_indent : 0) + + 1; + assert(bytes >= 0); + leader = xmalloc((size_t)bytes); + allocated = leader; // remember to free it later + + STRLCPY(leader, saved_line, lead_len + 1); + + // 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 (ascii_isdigit(*p) || *p == '-') { + off = getdigits_int(&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 + && ascii_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) { + memmove(endp + l, endp, + (size_t)((leader + lead_len) - endp)); + } + lead_len += l; + } + 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 = utf_head_off(leader, p); + + if (l > 1) { + p -= l; + if (ptr2cells(p) > 1) { + p[1] = ' '; + l--; + } + memmove(p + 1, p + l + 1, + (size_t)((leader + lead_len) - (p + l + 1))); + lead_len -= l; + *p = ' '; + } else if (!ascii_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) { + memmove(p + lead_repl_len, p + i, + (size_t)(lead_len - i - (p - leader))); + lead_len += lead_repl_len - i; + } + } + 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 (!ascii_iswhite(*p)) { + // Don't put a space before a TAB. + if (p + 1 < leader + lead_len && p[1] == TAB) { + lead_len--; + memmove(p, p + 1, (size_t)(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++ = ' '; + } + memmove(p + 1, p + l, (size_t)(leader + lead_len - p)); + lead_len -= l - 1; + } + *p = ' '; + } + } + } + *p = NUL; + } + + // Recompute the indent, it may have changed. + if (curbuf->b_p_ai + || do_si + ) { + newindent = get_indent_str(leader, (int)curbuf->b_p_ts, false); + } + + // 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 && ascii_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 + || did_si + ) { + while (lead_len && ascii_iswhite(*leader)) { + lead_len--; + newcol--; + leader++; + } + } + + did_si = can_si = false; + } 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 || do_si)) { + 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; + } + } + } + + // (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') + && !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 + } + + // concatenate leader and p_extra, if there is a leader + if (lead_len > 0) { + 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 + } + + 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 + || curwin->w_p_diff) { + mark_adjust(curwin->w_cursor.lnum + 1, (linenr_T)MAXLNUM, 1L, 0L, false); + } + 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; + } + + inhibit_delete_count++; + if (newindent + || did_si + ) { + curwin->w_cursor.lnum++; + if (did_si) { + int sw = get_sw_value(curbuf); + + if (p_sr) { + newindent -= newindent % sw; + } + newindent += sw; + } + // 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 (colnr_T n = 0; n < curwin->w_cursor.col; n++) { + replace_push(NUL); + } + } + newcol += curwin->w_cursor.col; + if (no_si) { + did_si = false; + } + } + inhibit_delete_count--; + + // 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); + } + } + + 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, true); + 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, true); + } + + curwin->w_cursor.col = newcol; + curwin->w_cursor.coladd = 0; + + // 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; + } + // May do lisp indenting. + if (!p_paste + && leader == NULL + && curbuf->b_p_lisp + && curbuf->b_p_ai) { + fixthisline(get_lisp_indent); + ai_col = (colnr_T)getwhitecols_curline(); + } + // May do indenting after opening a new line. + if (!p_paste + && (curbuf->b_p_cin + || *curbuf->b_p_inde != NUL + ) + && 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(); + } + if (vreplace_mode != 0) { + State = vreplace_mode; + } + + // 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(get_cursor_line_ptr()); + + // 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() + xfree(p_extra); + next_line = NULL; + } + + retval = true; // success! +theend: + curbuf->b_p_pi = saved_pi; + xfree(saved_line); + xfree(next_line); + xfree(allocated); + return retval; +} // NOLINT(readability/fn_size) + +/// Delete from cursor to end of line. +/// Caller must have prepared for undo. +/// If "fixpos" is true fix the cursor position when done. +void 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), (size_t)col); + } + 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--; + } +} + +/// 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); +} |