/
edit.c
10269 lines (9418 loc) · 250 KB
/
edit.c
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/* vi:set ts=8 sts=4 sw=4:
*
* 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.
*/
/*
* edit.c: functions for Insert mode
*/
#include "vim.h"
#ifdef FEAT_INS_EXPAND
/*
* definitions used for CTRL-X submode
*/
#define CTRL_X_WANT_IDENT 0x100
#define CTRL_X_NOT_DEFINED_YET 1
#define CTRL_X_SCROLL 2
#define CTRL_X_WHOLE_LINE 3
#define CTRL_X_FILES 4
#define CTRL_X_TAGS (5 + CTRL_X_WANT_IDENT)
#define CTRL_X_PATH_PATTERNS (6 + CTRL_X_WANT_IDENT)
#define CTRL_X_PATH_DEFINES (7 + CTRL_X_WANT_IDENT)
#define CTRL_X_FINISHED 8
#define CTRL_X_DICTIONARY (9 + CTRL_X_WANT_IDENT)
#define CTRL_X_THESAURUS (10 + CTRL_X_WANT_IDENT)
#define CTRL_X_CMDLINE 11
#define CTRL_X_FUNCTION 12
#define CTRL_X_OMNI 13
#define CTRL_X_SPELL 14
#define CTRL_X_LOCAL_MSG 15 /* only used in "ctrl_x_msgs" */
#define CTRL_X_MSG(i) ctrl_x_msgs[(i) & ~CTRL_X_WANT_IDENT]
static char *ctrl_x_msgs[] =
{
N_(" Keyword completion (^N^P)"), /* ctrl_x_mode == 0, ^P/^N compl. */
N_(" ^X mode (^]^D^E^F^I^K^L^N^O^Ps^U^V^Y)"),
NULL,
N_(" Whole line completion (^L^N^P)"),
N_(" File name completion (^F^N^P)"),
N_(" Tag completion (^]^N^P)"),
N_(" Path pattern completion (^N^P)"),
N_(" Definition completion (^D^N^P)"),
NULL,
N_(" Dictionary completion (^K^N^P)"),
N_(" Thesaurus completion (^T^N^P)"),
N_(" Command-line completion (^V^N^P)"),
N_(" User defined completion (^U^N^P)"),
N_(" Omni completion (^O^N^P)"),
N_(" Spelling suggestion (s^N^P)"),
N_(" Keyword Local completion (^N^P)"),
};
static char e_hitend[] = N_("Hit end of paragraph");
#ifdef FEAT_COMPL_FUNC
static char e_complwin[] = N_("E839: Completion function changed window");
static char e_compldel[] = N_("E840: Completion function deleted text");
#endif
/*
* Structure used to store one match for insert completion.
*/
typedef struct compl_S compl_T;
struct compl_S
{
compl_T *cp_next;
compl_T *cp_prev;
char_u *cp_str; /* matched text */
char cp_icase; /* TRUE or FALSE: ignore case */
char_u *(cp_text[CPT_COUNT]); /* text for the menu */
char_u *cp_fname; /* file containing the match, allocated when
* cp_flags has FREE_FNAME */
int cp_flags; /* ORIGINAL_TEXT, CONT_S_IPOS or FREE_FNAME */
int cp_number; /* sequence number */
};
#define ORIGINAL_TEXT (1) /* the original text when the expansion begun */
#define FREE_FNAME (2)
/*
* All the current matches are stored in a list.
* "compl_first_match" points to the start of the list.
* "compl_curr_match" points to the currently selected entry.
* "compl_shown_match" is different from compl_curr_match during
* ins_compl_get_exp().
*/
static compl_T *compl_first_match = NULL;
static compl_T *compl_curr_match = NULL;
static compl_T *compl_shown_match = NULL;
/* After using a cursor key <Enter> selects a match in the popup menu,
* otherwise it inserts a line break. */
static int compl_enter_selects = FALSE;
/* When "compl_leader" is not NULL only matches that start with this string
* are used. */
static char_u *compl_leader = NULL;
static int compl_get_longest = FALSE; /* put longest common string
in compl_leader */
static int compl_used_match; /* Selected one of the matches. When
FALSE the match was edited or using
the longest common string. */
static int compl_was_interrupted = FALSE; /* didn't finish finding
completions. */
static int compl_restarting = FALSE; /* don't insert match */
/* When the first completion is done "compl_started" is set. When it's
* FALSE the word to be completed must be located. */
static int compl_started = FALSE;
/* Set when doing something for completion that may call edit() recursively,
* which is not allowed. */
static int compl_busy = FALSE;
static int compl_matches = 0;
static char_u *compl_pattern = NULL;
static int compl_direction = FORWARD;
static int compl_shows_dir = FORWARD;
static int compl_pending = 0; /* > 1 for postponed CTRL-N */
static pos_T compl_startpos;
static colnr_T compl_col = 0; /* column where the text starts
* that is being completed */
static char_u *compl_orig_text = NULL; /* text as it was before
* completion started */
static int compl_cont_mode = 0;
static expand_T compl_xp;
static int compl_opt_refresh_always = FALSE;
static void ins_ctrl_x __ARGS((void));
static int has_compl_option __ARGS((int dict_opt));
static int ins_compl_accept_char __ARGS((int c));
static int ins_compl_add __ARGS((char_u *str, int len, int icase, char_u *fname, char_u **cptext, int cdir, int flags, int adup));
static int ins_compl_equal __ARGS((compl_T *match, char_u *str, int len));
static void ins_compl_longest_match __ARGS((compl_T *match));
static void ins_compl_add_matches __ARGS((int num_matches, char_u **matches, int icase));
static int ins_compl_make_cyclic __ARGS((void));
static void ins_compl_upd_pum __ARGS((void));
static void ins_compl_del_pum __ARGS((void));
static int pum_wanted __ARGS((void));
static int pum_enough_matches __ARGS((void));
static void ins_compl_dictionaries __ARGS((char_u *dict, char_u *pat, int flags, int thesaurus));
static void ins_compl_files __ARGS((int count, char_u **files, int thesaurus, int flags, regmatch_T *regmatch, char_u *buf, int *dir));
static char_u *find_line_end __ARGS((char_u *ptr));
static void ins_compl_free __ARGS((void));
static void ins_compl_clear __ARGS((void));
static int ins_compl_bs __ARGS((void));
static int ins_compl_need_restart __ARGS((void));
static void ins_compl_new_leader __ARGS((void));
static void ins_compl_addleader __ARGS((int c));
static int ins_compl_len __ARGS((void));
static void ins_compl_restart __ARGS((void));
static void ins_compl_set_original_text __ARGS((char_u *str));
static void ins_compl_addfrommatch __ARGS((void));
static int ins_compl_prep __ARGS((int c));
static void ins_compl_fixRedoBufForLeader __ARGS((char_u *ptr_arg));
static buf_T *ins_compl_next_buf __ARGS((buf_T *buf, int flag));
#if defined(FEAT_COMPL_FUNC) || defined(FEAT_EVAL)
static void ins_compl_add_list __ARGS((list_T *list));
static void ins_compl_add_dict __ARGS((dict_T *dict));
#endif
static int ins_compl_get_exp __ARGS((pos_T *ini));
static void ins_compl_delete __ARGS((void));
static void ins_compl_insert __ARGS((void));
static int ins_compl_next __ARGS((int allow_get_expansion, int count, int insert_match));
static int ins_compl_key2dir __ARGS((int c));
static int ins_compl_pum_key __ARGS((int c));
static int ins_compl_key2count __ARGS((int c));
static int ins_compl_use_match __ARGS((int c));
static int ins_complete __ARGS((int c));
static unsigned quote_meta __ARGS((char_u *dest, char_u *str, int len));
#endif /* FEAT_INS_EXPAND */
#define BACKSPACE_CHAR 1
#define BACKSPACE_WORD 2
#define BACKSPACE_WORD_NOT_SPACE 3
#define BACKSPACE_LINE 4
static void ins_redraw __ARGS((int ready));
static void ins_ctrl_v __ARGS((void));
static void undisplay_dollar __ARGS((void));
static void insert_special __ARGS((int, int, int));
static void internal_format __ARGS((int textwidth, int second_indent, int flags, int format_only, int c));
static void check_auto_format __ARGS((int));
static void redo_literal __ARGS((int c));
static void start_arrow __ARGS((pos_T *end_insert_pos));
#ifdef FEAT_SPELL
static void check_spell_redraw __ARGS((void));
static void spell_back_to_badword __ARGS((void));
static int spell_bad_len = 0; /* length of located bad word */
#endif
static void stop_insert __ARGS((pos_T *end_insert_pos, int esc, int nomove));
static int echeck_abbr __ARGS((int));
static int replace_pop __ARGS((void));
static void replace_join __ARGS((int off));
static void replace_pop_ins __ARGS((void));
#ifdef FEAT_MBYTE
static void mb_replace_pop_ins __ARGS((int cc));
#endif
static void replace_flush __ARGS((void));
static void replace_do_bs __ARGS((int limit_col));
static int del_char_after_col __ARGS((int limit_col));
#ifdef FEAT_CINDENT
static int cindent_on __ARGS((void));
#endif
static void ins_reg __ARGS((void));
static void ins_ctrl_g __ARGS((void));
static void ins_ctrl_hat __ARGS((void));
static int ins_esc __ARGS((long *count, int cmdchar, int nomove));
#ifdef FEAT_RIGHTLEFT
static void ins_ctrl_ __ARGS((void));
#endif
static int ins_start_select __ARGS((int c));
static void ins_insert __ARGS((int replaceState));
static void ins_ctrl_o __ARGS((void));
static void ins_shift __ARGS((int c, int lastc));
static void ins_del __ARGS((void));
static int ins_bs __ARGS((int c, int mode, int *inserted_space_p));
#ifdef FEAT_MOUSE
static void ins_mouse __ARGS((int c));
static void ins_mousescroll __ARGS((int dir));
#endif
#if defined(FEAT_GUI_TABLINE) || defined(PROTO)
static void ins_tabline __ARGS((int c));
#endif
static void ins_left __ARGS((void));
static void ins_home __ARGS((int c));
static void ins_end __ARGS((int c));
static void ins_s_left __ARGS((void));
static void ins_right __ARGS((void));
static void ins_s_right __ARGS((void));
static void ins_up __ARGS((int startcol));
static void ins_pageup __ARGS((void));
static void ins_down __ARGS((int startcol));
static void ins_pagedown __ARGS((void));
#ifdef FEAT_DND
static void ins_drop __ARGS((void));
#endif
static int ins_tab __ARGS((void));
static int ins_eol __ARGS((int c));
#ifdef FEAT_DIGRAPHS
static int ins_digraph __ARGS((void));
#endif
static int ins_ctrl_ey __ARGS((int tc));
#ifdef FEAT_SMARTINDENT
static void ins_try_si __ARGS((int c));
#endif
static colnr_T get_nolist_virtcol __ARGS((void));
#ifdef FEAT_AUTOCMD
static char_u *do_insert_char_pre __ARGS((int c));
#endif
static colnr_T Insstart_textlen; /* length of line when insert started */
static colnr_T Insstart_blank_vcol; /* vcol for first inserted blank */
static int update_Insstart_orig = TRUE; /* set Insstart_orig to Insstart */
static char_u *last_insert = NULL; /* the text of the previous insert,
K_SPECIAL and CSI are escaped */
static int last_insert_skip; /* nr of chars in front of previous insert */
static int new_insert_skip; /* nr of chars in front of current insert */
static int did_restart_edit; /* "restart_edit" when calling edit() */
#ifdef FEAT_CINDENT
static int can_cindent; /* may do cindenting on this line */
#endif
static int old_indent = 0; /* for ^^D command in insert mode */
#ifdef FEAT_RIGHTLEFT
static int revins_on; /* reverse insert mode on */
static int revins_chars; /* how much to skip after edit */
static int revins_legal; /* was the last char 'legal'? */
static int revins_scol; /* start column of revins session */
#endif
static int ins_need_undo; /* call u_save() before inserting a
char. Set when edit() is called.
after that arrow_used is used. */
static int did_add_space = FALSE; /* auto_format() added an extra space
under the cursor */
/*
* edit(): Start inserting text.
*
* "cmdchar" can be:
* 'i' normal insert command
* 'a' normal append command
* 'R' replace command
* 'r' "r<CR>" command: insert one <CR>. Note: count can be > 1, for redo,
* but still only one <CR> is inserted. The <Esc> is not used for redo.
* 'g' "gI" command.
* 'V' "gR" command for Virtual Replace mode.
* 'v' "gr" command for single character Virtual Replace mode.
*
* This function is not called recursively. For CTRL-O commands, it returns
* and lets the caller handle the Normal-mode command.
*
* Return TRUE if a CTRL-O command caused the return (insert mode pending).
*/
int
edit(cmdchar, startln, count)
int cmdchar;
int startln; /* if set, insert at start of line */
long count;
{
int c = 0;
char_u *ptr;
int lastc;
int mincol;
static linenr_T o_lnum = 0;
int i;
int did_backspace = TRUE; /* previous char was backspace */
#ifdef FEAT_CINDENT
int line_is_white = FALSE; /* line is empty before insert */
#endif
linenr_T old_topline = 0; /* topline before insertion */
#ifdef FEAT_DIFF
int old_topfill = -1;
#endif
int inserted_space = FALSE; /* just inserted a space */
int replaceState = REPLACE;
int nomove = FALSE; /* don't move cursor on return */
/* Remember whether editing was restarted after CTRL-O. */
did_restart_edit = restart_edit;
/* sleep before redrawing, needed for "CTRL-O :" that results in an
* error message */
check_for_delay(TRUE);
/* set Insstart_orig to Insstart */
update_Insstart_orig = TRUE;
#ifdef HAVE_SANDBOX
/* Don't allow inserting in the sandbox. */
if (sandbox != 0)
{
EMSG(_(e_sandbox));
return FALSE;
}
#endif
/* Don't allow changes in the buffer while editing the cmdline. The
* caller of getcmdline() may get confused. */
if (textlock != 0)
{
EMSG(_(e_secure));
return FALSE;
}
#ifdef FEAT_INS_EXPAND
/* Don't allow recursive insert mode when busy with completion. */
if (compl_started || compl_busy || pum_visible())
{
EMSG(_(e_secure));
return FALSE;
}
ins_compl_clear(); /* clear stuff for CTRL-X mode */
#endif
#ifdef FEAT_AUTOCMD
/*
* Trigger InsertEnter autocommands. Do not do this for "r<CR>" or "grx".
*/
if (cmdchar != 'r' && cmdchar != 'v')
{
pos_T save_cursor = curwin->w_cursor;
# ifdef FEAT_EVAL
if (cmdchar == 'R')
ptr = (char_u *)"r";
else if (cmdchar == 'V')
ptr = (char_u *)"v";
else
ptr = (char_u *)"i";
set_vim_var_string(VV_INSERTMODE, ptr, 1);
set_vim_var_string(VV_CHAR, NULL, -1); /* clear v:char */
# endif
apply_autocmds(EVENT_INSERTENTER, NULL, NULL, FALSE, curbuf);
/* Make sure the cursor didn't move. Do call check_cursor_col() in
* case the text was modified. Since Insert mode was not started yet
* a call to check_cursor_col() may move the cursor, especially with
* the "A" command, thus set State to avoid that. Also check that the
* line number is still valid (lines may have been deleted).
* Do not restore if v:char was set to a non-empty string. */
if (!equalpos(curwin->w_cursor, save_cursor)
# ifdef FEAT_EVAL
&& *get_vim_var_str(VV_CHAR) == NUL
# endif
&& save_cursor.lnum <= curbuf->b_ml.ml_line_count)
{
int save_state = State;
curwin->w_cursor = save_cursor;
State = INSERT;
check_cursor_col();
State = save_state;
}
}
#endif
#ifdef FEAT_CONCEAL
/* Check if the cursor line needs redrawing before changing State. If
* 'concealcursor' is "n" it needs to be redrawn without concealing. */
conceal_check_cursur_line();
#endif
#ifdef FEAT_MOUSE
/*
* When doing a paste with the middle mouse button, Insstart is set to
* where the paste started.
*/
if (where_paste_started.lnum != 0)
Insstart = where_paste_started;
else
#endif
{
Insstart = curwin->w_cursor;
if (startln)
Insstart.col = 0;
}
Insstart_textlen = (colnr_T)linetabsize(ml_get_curline());
Insstart_blank_vcol = MAXCOL;
if (!did_ai)
ai_col = 0;
if (cmdchar != NUL && restart_edit == 0)
{
ResetRedobuff();
AppendNumberToRedobuff(count);
#ifdef FEAT_VREPLACE
if (cmdchar == 'V' || cmdchar == 'v')
{
/* "gR" or "gr" command */
AppendCharToRedobuff('g');
AppendCharToRedobuff((cmdchar == 'v') ? 'r' : 'R');
}
else
#endif
{
AppendCharToRedobuff(cmdchar);
if (cmdchar == 'g') /* "gI" command */
AppendCharToRedobuff('I');
else if (cmdchar == 'r') /* "r<CR>" command */
count = 1; /* insert only one <CR> */
}
}
if (cmdchar == 'R')
{
#ifdef FEAT_FKMAP
if (p_fkmap && p_ri)
{
beep_flush();
EMSG(farsi_text_3); /* encoded in Farsi */
State = INSERT;
}
else
#endif
State = REPLACE;
}
#ifdef FEAT_VREPLACE
else if (cmdchar == 'V' || cmdchar == 'v')
{
State = VREPLACE;
replaceState = VREPLACE;
orig_line_count = curbuf->b_ml.ml_line_count;
vr_lines_changed = 1;
}
#endif
else
State = INSERT;
stop_insert_mode = FALSE;
/*
* Need to recompute the cursor position, it might move when the cursor is
* on a TAB or special character.
*/
curs_columns(TRUE);
/*
* Enable langmap or IME, indicated by 'iminsert'.
* Note that IME may enabled/disabled without us noticing here, thus the
* 'iminsert' value may not reflect what is actually used. It is updated
* when hitting <Esc>.
*/
if (curbuf->b_p_iminsert == B_IMODE_LMAP)
State |= LANGMAP;
#ifdef USE_IM_CONTROL
im_set_active(curbuf->b_p_iminsert == B_IMODE_IM);
#endif
#ifdef FEAT_MOUSE
setmouse();
#endif
#ifdef FEAT_CMDL_INFO
clear_showcmd();
#endif
#ifdef FEAT_RIGHTLEFT
/* there is no reverse replace mode */
revins_on = (State == INSERT && p_ri);
if (revins_on)
undisplay_dollar();
revins_chars = 0;
revins_legal = 0;
revins_scol = -1;
#endif
/*
* Handle restarting Insert mode.
* Don't do this for "CTRL-O ." (repeat an insert): we get here with
* restart_edit non-zero, and something in the stuff buffer.
*/
if (restart_edit != 0 && stuff_empty())
{
#ifdef FEAT_MOUSE
/*
* After a paste we consider text typed to be part of the insert for
* the pasted text. You can backspace over the pasted text too.
*/
if (where_paste_started.lnum)
arrow_used = FALSE;
else
#endif
arrow_used = TRUE;
restart_edit = 0;
/*
* If the cursor was after the end-of-line before the CTRL-O and it is
* now at the end-of-line, put it after the end-of-line (this is not
* correct in very rare cases).
* Also do this if curswant is greater than the current virtual
* column. Eg after "^O$" or "^O80|".
*/
validate_virtcol();
update_curswant();
if (((ins_at_eol && curwin->w_cursor.lnum == o_lnum)
|| curwin->w_curswant > curwin->w_virtcol)
&& *(ptr = ml_get_curline() + curwin->w_cursor.col) != NUL)
{
if (ptr[1] == NUL)
++curwin->w_cursor.col;
#ifdef FEAT_MBYTE
else if (has_mbyte)
{
i = (*mb_ptr2len)(ptr);
if (ptr[i] == NUL)
curwin->w_cursor.col += i;
}
#endif
}
ins_at_eol = FALSE;
}
else
arrow_used = FALSE;
/* we are in insert mode now, don't need to start it anymore */
need_start_insertmode = FALSE;
/* Need to save the line for undo before inserting the first char. */
ins_need_undo = TRUE;
#ifdef FEAT_MOUSE
where_paste_started.lnum = 0;
#endif
#ifdef FEAT_CINDENT
can_cindent = TRUE;
#endif
#ifdef FEAT_FOLDING
/* The cursor line is not in a closed fold, unless 'insertmode' is set or
* restarting. */
if (!p_im && did_restart_edit == 0)
foldOpenCursor();
#endif
/*
* If 'showmode' is set, show the current (insert/replace/..) mode.
* A warning message for changing a readonly file is given here, before
* actually changing anything. It's put after the mode, if any.
*/
i = 0;
if (p_smd && msg_silent == 0)
i = showmode();
if (!p_im && did_restart_edit == 0)
change_warning(i == 0 ? 0 : i + 1);
#ifdef CURSOR_SHAPE
ui_cursor_shape(); /* may show different cursor shape */
#endif
#ifdef FEAT_DIGRAPHS
do_digraph(-1); /* clear digraphs */
#endif
/*
* Get the current length of the redo buffer, those characters have to be
* skipped if we want to get to the inserted characters.
*/
ptr = get_inserted();
if (ptr == NULL)
new_insert_skip = 0;
else
{
new_insert_skip = (int)STRLEN(ptr);
vim_free(ptr);
}
old_indent = 0;
/*
* Main loop in Insert mode: repeat until Insert mode is left.
*/
for (;;)
{
#ifdef FEAT_RIGHTLEFT
if (!revins_legal)
revins_scol = -1; /* reset on illegal motions */
else
revins_legal = 0;
#endif
if (arrow_used) /* don't repeat insert when arrow key used */
count = 0;
if (update_Insstart_orig)
Insstart_orig = Insstart;
if (stop_insert_mode)
{
/* ":stopinsert" used or 'insertmode' reset */
count = 0;
goto doESCkey;
}
/* set curwin->w_curswant for next K_DOWN or K_UP */
if (!arrow_used)
curwin->w_set_curswant = TRUE;
/* If there is no typeahead may check for timestamps (e.g., for when a
* menu invoked a shell command). */
if (stuff_empty())
{
did_check_timestamps = FALSE;
if (need_check_timestamps)
check_timestamps(FALSE);
}
/*
* When emsg() was called msg_scroll will have been set.
*/
msg_scroll = FALSE;
#ifdef FEAT_GUI
/* When 'mousefocus' is set a mouse movement may have taken us to
* another window. "need_mouse_correct" may then be set because of an
* autocommand. */
if (need_mouse_correct)
gui_mouse_correct();
#endif
#ifdef FEAT_FOLDING
/* Open fold at the cursor line, according to 'foldopen'. */
if (fdo_flags & FDO_INSERT)
foldOpenCursor();
/* Close folds where the cursor isn't, according to 'foldclose' */
if (!char_avail())
foldCheckClose();
#endif
/*
* If we inserted a character at the last position of the last line in
* the window, scroll the window one line up. This avoids an extra
* redraw.
* This is detected when the cursor column is smaller after inserting
* something.
* Don't do this when the topline changed already, it has
* already been adjusted (by insertchar() calling open_line())).
*/
if (curbuf->b_mod_set
&& curwin->w_p_wrap
&& !did_backspace
&& curwin->w_topline == old_topline
#ifdef FEAT_DIFF
&& curwin->w_topfill == old_topfill
#endif
)
{
mincol = curwin->w_wcol;
validate_cursor_col();
if ((int)curwin->w_wcol < mincol - curbuf->b_p_ts
&& curwin->w_wrow == W_WINROW(curwin)
+ curwin->w_height - 1 - p_so
&& (curwin->w_cursor.lnum != curwin->w_topline
#ifdef FEAT_DIFF
|| curwin->w_topfill > 0
#endif
))
{
#ifdef FEAT_DIFF
if (curwin->w_topfill > 0)
--curwin->w_topfill;
else
#endif
#ifdef FEAT_FOLDING
if (hasFolding(curwin->w_topline, NULL, &old_topline))
set_topline(curwin, old_topline + 1);
else
#endif
set_topline(curwin, curwin->w_topline + 1);
}
}
/* May need to adjust w_topline to show the cursor. */
update_topline();
did_backspace = FALSE;
validate_cursor(); /* may set must_redraw */
/*
* Redraw the display when no characters are waiting.
* Also shows mode, ruler and positions cursor.
*/
ins_redraw(TRUE);
#ifdef FEAT_SCROLLBIND
if (curwin->w_p_scb)
do_check_scrollbind(TRUE);
#endif
#ifdef FEAT_CURSORBIND
if (curwin->w_p_crb)
do_check_cursorbind();
#endif
update_curswant();
old_topline = curwin->w_topline;
#ifdef FEAT_DIFF
old_topfill = curwin->w_topfill;
#endif
#ifdef USE_ON_FLY_SCROLL
dont_scroll = FALSE; /* allow scrolling here */
#endif
/*
* Get a character for Insert mode. Ignore K_IGNORE.
*/
lastc = c; /* remember previous char for CTRL-D */
do
{
c = safe_vgetc();
} while (c == K_IGNORE);
#ifdef FEAT_AUTOCMD
/* Don't want K_CURSORHOLD for the second key, e.g., after CTRL-V. */
did_cursorhold = TRUE;
#endif
#ifdef FEAT_RIGHTLEFT
if (p_hkmap && KeyTyped)
c = hkmap(c); /* Hebrew mode mapping */
#endif
#ifdef FEAT_FKMAP
if (p_fkmap && KeyTyped)
c = fkmap(c); /* Farsi mode mapping */
#endif
#ifdef FEAT_INS_EXPAND
/*
* Special handling of keys while the popup menu is visible or wanted
* and the cursor is still in the completed word. Only when there is
* a match, skip this when no matches were found.
*/
if (compl_started
&& pum_wanted()
&& curwin->w_cursor.col >= compl_col
&& (compl_shown_match == NULL
|| compl_shown_match != compl_shown_match->cp_next))
{
/* BS: Delete one character from "compl_leader". */
if ((c == K_BS || c == Ctrl_H)
&& curwin->w_cursor.col > compl_col
&& (c = ins_compl_bs()) == NUL)
continue;
/* When no match was selected or it was edited. */
if (!compl_used_match)
{
/* CTRL-L: Add one character from the current match to
* "compl_leader". Except when at the original match and
* there is nothing to add, CTRL-L works like CTRL-P then. */
if (c == Ctrl_L
&& (ctrl_x_mode != CTRL_X_WHOLE_LINE
|| (int)STRLEN(compl_shown_match->cp_str)
> curwin->w_cursor.col - compl_col))
{
ins_compl_addfrommatch();
continue;
}
/* A non-white character that fits in with the current
* completion: Add to "compl_leader". */
if (ins_compl_accept_char(c))
{
#ifdef FEAT_AUTOCMD
/* Trigger InsertCharPre. */
char_u *str = do_insert_char_pre(c);
char_u *p;
if (str != NULL)
{
for (p = str; *p != NUL; mb_ptr_adv(p))
ins_compl_addleader(PTR2CHAR(p));
vim_free(str);
}
else
#endif
ins_compl_addleader(c);
continue;
}
/* Pressing CTRL-Y selects the current match. When
* compl_enter_selects is set the Enter key does the same. */
if (c == Ctrl_Y || (compl_enter_selects
&& (c == CAR || c == K_KENTER || c == NL)))
{
ins_compl_delete();
ins_compl_insert();
}
}
}
/* Prepare for or stop CTRL-X mode. This doesn't do completion, but
* it does fix up the text when finishing completion. */
compl_get_longest = FALSE;
if (ins_compl_prep(c))
continue;
#endif
/* CTRL-\ CTRL-N goes to Normal mode,
* CTRL-\ CTRL-G goes to mode selected with 'insertmode',
* CTRL-\ CTRL-O is like CTRL-O but without moving the cursor. */
if (c == Ctrl_BSL)
{
/* may need to redraw when no more chars available now */
ins_redraw(FALSE);
++no_mapping;
++allow_keys;
c = plain_vgetc();
--no_mapping;
--allow_keys;
if (c != Ctrl_N && c != Ctrl_G && c != Ctrl_O)
{
/* it's something else */
vungetc(c);
c = Ctrl_BSL;
}
else if (c == Ctrl_G && p_im)
continue;
else
{
if (c == Ctrl_O)
{
ins_ctrl_o();
ins_at_eol = FALSE; /* cursor keeps its column */
nomove = TRUE;
}
count = 0;
goto doESCkey;
}
}
#ifdef FEAT_DIGRAPHS
c = do_digraph(c);
#endif
#ifdef FEAT_INS_EXPAND
if ((c == Ctrl_V || c == Ctrl_Q) && ctrl_x_mode == CTRL_X_CMDLINE)
goto docomplete;
#endif
if (c == Ctrl_V || c == Ctrl_Q)
{
ins_ctrl_v();
c = Ctrl_V; /* pretend CTRL-V is last typed character */
continue;
}
#ifdef FEAT_CINDENT
if (cindent_on()
# ifdef FEAT_INS_EXPAND
&& ctrl_x_mode == 0
# endif
)
{
/* A key name preceded by a bang means this key is not to be
* inserted. Skip ahead to the re-indenting below.
* A key name preceded by a star means that indenting has to be
* done before inserting the key. */
line_is_white = inindent(0);
if (in_cinkeys(c, '!', line_is_white))
goto force_cindent;
if (can_cindent && in_cinkeys(c, '*', line_is_white)
&& stop_arrow() == OK)
do_c_expr_indent();
}
#endif
#ifdef FEAT_RIGHTLEFT
if (curwin->w_p_rl)
switch (c)
{
case K_LEFT: c = K_RIGHT; break;
case K_S_LEFT: c = K_S_RIGHT; break;
case K_C_LEFT: c = K_C_RIGHT; break;
case K_RIGHT: c = K_LEFT; break;
case K_S_RIGHT: c = K_S_LEFT; break;
case K_C_RIGHT: c = K_C_LEFT; break;
}
#endif
/*
* If 'keymodel' contains "startsel", may start selection. If it
* does, a CTRL-O and c will be stuffed, we need to get these
* characters.
*/
if (ins_start_select(c))
continue;
/*
* The big switch to handle a character in insert mode.
*/
switch (c)
{
case ESC: /* End input mode */
if (echeck_abbr(ESC + ABBR_OFF))
break;
/*FALLTHROUGH*/
case Ctrl_C: /* End input mode */
#ifdef FEAT_CMDWIN
if (c == Ctrl_C && cmdwin_type != 0)
{
/* Close the cmdline window. */
cmdwin_result = K_IGNORE;
got_int = FALSE; /* don't stop executing autocommands et al. */
nomove = TRUE;
goto doESCkey;
}
#endif
#ifdef UNIX
do_intr:
#endif
/* when 'insertmode' set, and not halfway a mapping, don't leave
* Insert mode */
if (goto_im())
{
if (got_int)
{
(void)vgetc(); /* flush all buffers */
got_int = FALSE;
}
else
vim_beep();
break;
}
doESCkey:
/*
* This is the ONLY return from edit()!
*/
/* Always update o_lnum, so that a "CTRL-O ." that adds a line
* still puts the cursor back after the inserted text. */
if (ins_at_eol && gchar_cursor() == NUL)
o_lnum = curwin->w_cursor.lnum;
if (ins_esc(&count, cmdchar, nomove))
{
#ifdef FEAT_AUTOCMD
if (cmdchar != 'r' && cmdchar != 'v')
apply_autocmds(EVENT_INSERTLEAVE, NULL, NULL,
FALSE, curbuf);
did_cursorhold = FALSE;
#endif
return (c == Ctrl_O);
}
continue;
case Ctrl_Z: /* suspend when 'insertmode' set */