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vim-patch:8.2.1622: loop to handle keys for the command line is too long (#21307)

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Problem:    Loop to handle keys for the command line is too long.
Solution:   Move code to functions. (Yegappan Lakshmanan, closes vim/vim#6880)

2f3cd2e4ec

Use the command line state as only argument instead.
This commit is contained in:
zeertzjq
2022-12-06 16:31:38 +08:00
committed by GitHub
parent 6d7b94ea08
commit d82e56dd12
1 changed files with 286 additions and 254 deletions
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540
src/nvim/ex_getln.c
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@@ -1410,72 +1410,14 @@ static int may_do_command_line_next_incsearch(int firstc, long count, incsearch_
return FAIL;
}
static void command_line_next_histidx(CommandLineState *s, bool next_match)
/// Handle backspace, delete and CTRL-W keys in the command-line mode.
static int command_line_erase_chars(CommandLineState *s)
{
int j = (int)strlen(s->lookfor);
for (;;) {
// one step backwards
if (!next_match) {
if (s->hiscnt == get_hislen()) {
// first time
s->hiscnt = *get_hisidx(s->histype);
} else if (s->hiscnt == 0 && *get_hisidx(s->histype) != get_hislen() - 1) {
s->hiscnt = get_hislen() - 1;
} else if (s->hiscnt != *get_hisidx(s->histype) + 1) {
s->hiscnt--;
} else {
// at top of list
s->hiscnt = s->save_hiscnt;
break;
}
} else { // one step forwards
// on last entry, clear the line
if (s->hiscnt == *get_hisidx(s->histype)) {
s->hiscnt = get_hislen();
break;
}
// not on a history line, nothing to do
if (s->hiscnt == get_hislen()) {
break;
}
if (s->hiscnt == get_hislen() - 1) {
// wrap around
s->hiscnt = 0;
} else {
s->hiscnt++;
}
}
if (s->hiscnt < 0 || get_histentry(s->histype)[s->hiscnt].hisstr == NULL) {
s->hiscnt = s->save_hiscnt;
break;
}
if ((s->c != K_UP && s->c != K_DOWN)
|| s->hiscnt == s->save_hiscnt
|| strncmp(get_histentry(s->histype)[s->hiscnt].hisstr,
s->lookfor, (size_t)j) == 0) {
break;
}
}
}
static int command_line_handle_key(CommandLineState *s)
{
// Big switch for a typed command line character.
switch (s->c) {
case K_BS:
case Ctrl_H:
case K_DEL:
case K_KDEL:
case Ctrl_W:
if (s->c == K_KDEL) {
s->c = K_DEL;
}
// delete current character is the same as backspace on next
// Delete current character is the same as backspace on next
// character, except at end of line
if (s->c == K_DEL && ccline.cmdpos != ccline.cmdlen) {
ccline.cmdpos++;
@@ -1545,15 +1487,12 @@ static int command_line_handle_key(CommandLineState *s)
return 0; // back to cmd mode
}
return command_line_changed(s);
}
case K_INS:
case K_KINS:
ccline.overstrike = !ccline.overstrike;
ui_cursor_shape(); // may show different cursor shape
return command_line_not_changed(s);
case Ctrl_HAT:
/// Handle the CTRL-^ key in the command-line mode and toggle the use of the
/// language :lmap mappings and/or Input Method.
static void command_line_toggle_langmap(CommandLineState *s)
{
if (map_to_exists_mode("", MODE_LANGMAP, false)) {
// ":lmap" mappings exists, toggle use of mappings.
State ^= MODE_LANGMAP;
@@ -1576,42 +1515,12 @@ static int command_line_handle_key(CommandLineState *s)
ui_cursor_shape(); // may show different cursor shape
// Show/unshow value of 'keymap' in status lines later.
status_redraw_curbuf();
return command_line_not_changed(s);
case Ctrl_U: {
// delete all characters left of the cursor
int j = ccline.cmdpos;
ccline.cmdlen -= j;
int i = ccline.cmdpos = 0;
while (i < ccline.cmdlen) {
ccline.cmdbuff[i++] = ccline.cmdbuff[j++];
}
// Truncate at the end, required for multi-byte chars.
ccline.cmdbuff[ccline.cmdlen] = NUL;
if (ccline.cmdlen == 0) {
s->is_state.search_start = s->is_state.save_cursor;
}
redrawcmd();
return command_line_changed(s);
}
case ESC: // get here if p_wc != ESC or when ESC typed twice
case Ctrl_C:
// In exmode it doesn't make sense to return. Except when
// ":normal" runs out of characters. Also when highlight callback is active
// <C-c> should interrupt only it.
if ((exmode_active && (ex_normal_busy == 0 || typebuf.tb_len > 0))
|| (getln_interrupted_highlight && s->c == Ctrl_C)) {
getln_interrupted_highlight = false;
return command_line_not_changed(s);
}
s->gotesc = true; // will free ccline.cmdbuff after
// putting it in history
return 0; // back to cmd mode
case Ctrl_R: { // insert register
/// Handle the CTRL-R key in the command-line mode and insert the contents of a
/// numbered or named register.
static int command_line_insert_reg(CommandLineState *s)
{
const int save_new_cmdpos = new_cmdpos;
putcmdline('"', true);
@@ -1668,85 +1577,9 @@ static int command_line_handle_key(CommandLineState *s)
return command_line_changed(s);
}
case Ctrl_D:
if (showmatches(&s->xpc, false) == EXPAND_NOTHING) {
break; // Use ^D as normal char instead
}
wild_menu_showing = WM_LIST;
redrawcmd();
return 1; // don't do incremental search now
case K_RIGHT:
case K_S_RIGHT:
case K_C_RIGHT:
do {
if (ccline.cmdpos >= ccline.cmdlen) {
break;
}
int cells = cmdline_charsize(ccline.cmdpos);
if (KeyTyped && ccline.cmdspos + cells >= Columns * Rows) {
break;
}
ccline.cmdspos += cells;
ccline.cmdpos += utfc_ptr2len(ccline.cmdbuff + ccline.cmdpos);
} while ((s->c == K_S_RIGHT || s->c == K_C_RIGHT
|| (mod_mask & (MOD_MASK_SHIFT|MOD_MASK_CTRL)))
&& ccline.cmdbuff[ccline.cmdpos] != ' ');
ccline.cmdspos = cmd_screencol(ccline.cmdpos);
return command_line_not_changed(s);
case K_LEFT:
case K_S_LEFT:
case K_C_LEFT:
if (ccline.cmdpos == 0) {
return command_line_not_changed(s);
}
do {
ccline.cmdpos--;
// Move to first byte of possibly multibyte char.
ccline.cmdpos -= utf_head_off(ccline.cmdbuff,
ccline.cmdbuff + ccline.cmdpos);
ccline.cmdspos -= cmdline_charsize(ccline.cmdpos);
} while (ccline.cmdpos > 0
&& (s->c == K_S_LEFT || s->c == K_C_LEFT
|| (mod_mask & (MOD_MASK_SHIFT|MOD_MASK_CTRL)))
&& ccline.cmdbuff[ccline.cmdpos - 1] != ' ');
ccline.cmdspos = cmd_screencol(ccline.cmdpos);
if (ccline.special_char != NUL) {
putcmdline(ccline.special_char, ccline.special_shift);
}
return command_line_not_changed(s);
case K_IGNORE:
// Ignore mouse event or open_cmdwin() result.
return command_line_not_changed(s);
case K_MIDDLEDRAG:
case K_MIDDLERELEASE:
return command_line_not_changed(s); // Ignore mouse
case K_MIDDLEMOUSE:
cmdline_paste(eval_has_provider("clipboard") ? '*' : 0, true, true);
redrawcmd();
return command_line_changed(s);
case K_LEFTDRAG:
case K_LEFTRELEASE:
case K_RIGHTDRAG:
case K_RIGHTRELEASE:
// Ignore drag and release events when the button-down wasn't
// seen before.
if (s->ignore_drag_release) {
return command_line_not_changed(s);
}
FALLTHROUGH;
case K_LEFTMOUSE:
case K_RIGHTMOUSE:
/// Handle the Left and Right mouse clicks in the command-line mode.
static void command_line_left_right_mouse(CommandLineState *s)
{
if (s->c == K_LEFTRELEASE || s->c == K_RIGHTRELEASE) {
s->ignore_drag_release = true;
} else {
@@ -1767,88 +1600,64 @@ static int command_line_handle_key(CommandLineState *s)
ccline.cmdpos += utfc_ptr2len(ccline.cmdbuff + ccline.cmdpos) - 1;
ccline.cmdspos += cells;
}
return command_line_not_changed(s);
// Mouse scroll wheel: ignored here
case K_MOUSEDOWN:
case K_MOUSEUP:
case K_MOUSELEFT:
case K_MOUSERIGHT:
// Alternate buttons ignored here
case K_X1MOUSE:
case K_X1DRAG:
case K_X1RELEASE:
case K_X2MOUSE:
case K_X2DRAG:
case K_X2RELEASE:
case K_MOUSEMOVE:
return command_line_not_changed(s);
case K_SELECT: // end of Select mode mapping - ignore
return command_line_not_changed(s);
case Ctrl_B: // begin of command line
case K_HOME:
case K_KHOME:
case K_S_HOME:
case K_C_HOME:
ccline.cmdpos = 0;
ccline.cmdspos = cmd_startcol();
return command_line_not_changed(s);
case Ctrl_E: // end of command line
case K_END:
case K_KEND:
case K_S_END:
case K_C_END:
ccline.cmdpos = ccline.cmdlen;
ccline.cmdspos = cmd_screencol(ccline.cmdpos);
return command_line_not_changed(s);
case Ctrl_A: // all matches
if (cmdline_pum_active()) {
// As Ctrl-A completes all the matches, close the popup
// menu (if present)
cmdline_pum_cleanup(&ccline);
}
if (nextwild(&s->xpc, WILD_ALL, 0, s->firstc != '@') == FAIL) {
static void command_line_next_histidx(CommandLineState *s, bool next_match)
{
int j = (int)strlen(s->lookfor);
for (;;) {
// one step backwards
if (!next_match) {
if (s->hiscnt == get_hislen()) {
// first time
s->hiscnt = *get_hisidx(s->histype);
} else if (s->hiscnt == 0 && *get_hisidx(s->histype) != get_hislen() - 1) {
s->hiscnt = get_hislen() - 1;
} else if (s->hiscnt != *get_hisidx(s->histype) + 1) {
s->hiscnt--;
} else {
// at top of list
s->hiscnt = s->save_hiscnt;
break;
}
s->xpc.xp_context = EXPAND_NOTHING;
s->did_wild_list = false;
return command_line_changed(s);
case Ctrl_L:
if (may_add_char_to_search(s->firstc, &s->c, &s->is_state) == OK) {
return command_line_not_changed(s);
}
// completion: longest common part
if (nextwild(&s->xpc, WILD_LONGEST, 0, s->firstc != '@') == FAIL) {
} else { // one step forwards
// on last entry, clear the line
if (s->hiscnt == *get_hisidx(s->histype)) {
s->hiscnt = get_hislen();
break;
}
return command_line_changed(s);
case Ctrl_N: // next match
case Ctrl_P: // previous match
if (s->xpc.xp_numfiles > 0) {
if (nextwild(&s->xpc, (s->c == Ctrl_P) ? WILD_PREV : WILD_NEXT,
0, s->firstc != '@') == FAIL) {
// not on a history line, nothing to do
if (s->hiscnt == get_hislen()) {
break;
}
return command_line_not_changed(s);
}
FALLTHROUGH;
case K_UP:
case K_DOWN:
case K_S_UP:
case K_S_DOWN:
case K_PAGEUP:
case K_KPAGEUP:
case K_PAGEDOWN:
case K_KPAGEDOWN:
if (s->hiscnt == get_hislen() - 1) {
// wrap around
s->hiscnt = 0;
} else {
s->hiscnt++;
}
}
if (s->hiscnt < 0 || get_histentry(s->histype)[s->hiscnt].hisstr == NULL) {
s->hiscnt = s->save_hiscnt;
break;
}
if ((s->c != K_UP && s->c != K_DOWN)
|| s->hiscnt == s->save_hiscnt
|| strncmp(get_histentry(s->histype)[s->hiscnt].hisstr,
s->lookfor, (size_t)j) == 0) {
break;
}
}
}
/// Handle the Up, Down, Page Up, Page down, CTRL-N and CTRL-P key in the
/// command-line mode. The pressed key is in 'c'.
static int command_line_browse_history(CommandLineState *s)
{
if (s->histype == HIST_INVALID || get_hislen() == 0 || s->firstc == NUL) {
// no history
return command_line_not_changed(s);
@@ -1931,6 +1740,229 @@ static int command_line_handle_key(CommandLineState *s)
}
beep_flush();
return command_line_not_changed(s);
}
static int command_line_handle_key(CommandLineState *s)
{
// Big switch for a typed command line character.
switch (s->c) {
case K_BS:
case Ctrl_H:
case K_DEL:
case K_KDEL:
case Ctrl_W:
return command_line_erase_chars(s);
case K_INS:
case K_KINS:
ccline.overstrike = !ccline.overstrike;
ui_cursor_shape(); // may show different cursor shape
return command_line_not_changed(s);
case Ctrl_HAT:
command_line_toggle_langmap(s);
return command_line_not_changed(s);
case Ctrl_U: {
// delete all characters left of the cursor
int j = ccline.cmdpos;
ccline.cmdlen -= j;
int i = ccline.cmdpos = 0;
while (i < ccline.cmdlen) {
ccline.cmdbuff[i++] = ccline.cmdbuff[j++];
}
// Truncate at the end, required for multi-byte chars.
ccline.cmdbuff[ccline.cmdlen] = NUL;
if (ccline.cmdlen == 0) {
s->is_state.search_start = s->is_state.save_cursor;
}
redrawcmd();
return command_line_changed(s);
}
case ESC: // get here if p_wc != ESC or when ESC typed twice
case Ctrl_C:
// In exmode it doesn't make sense to return. Except when
// ":normal" runs out of characters. Also when highlight callback is active
// <C-c> should interrupt only it.
if ((exmode_active && (ex_normal_busy == 0 || typebuf.tb_len > 0))
|| (getln_interrupted_highlight && s->c == Ctrl_C)) {
getln_interrupted_highlight = false;
return command_line_not_changed(s);
}
s->gotesc = true; // will free ccline.cmdbuff after
// putting it in history
return 0; // back to cmd mode
case Ctrl_R: // insert register
return command_line_insert_reg(s);
case Ctrl_D:
if (showmatches(&s->xpc, false) == EXPAND_NOTHING) {
break; // Use ^D as normal char instead
}
wild_menu_showing = WM_LIST;
redrawcmd();
return 1; // don't do incremental search now
case K_RIGHT:
case K_S_RIGHT:
case K_C_RIGHT:
do {
if (ccline.cmdpos >= ccline.cmdlen) {
break;
}
int cells = cmdline_charsize(ccline.cmdpos);
if (KeyTyped && ccline.cmdspos + cells >= Columns * Rows) {
break;
}
ccline.cmdspos += cells;
ccline.cmdpos += utfc_ptr2len(ccline.cmdbuff + ccline.cmdpos);
} while ((s->c == K_S_RIGHT || s->c == K_C_RIGHT
|| (mod_mask & (MOD_MASK_SHIFT|MOD_MASK_CTRL)))
&& ccline.cmdbuff[ccline.cmdpos] != ' ');
ccline.cmdspos = cmd_screencol(ccline.cmdpos);
return command_line_not_changed(s);
case K_LEFT:
case K_S_LEFT:
case K_C_LEFT:
if (ccline.cmdpos == 0) {
return command_line_not_changed(s);
}
do {
ccline.cmdpos--;
// Move to first byte of possibly multibyte char.
ccline.cmdpos -= utf_head_off(ccline.cmdbuff,
ccline.cmdbuff + ccline.cmdpos);
ccline.cmdspos -= cmdline_charsize(ccline.cmdpos);
} while (ccline.cmdpos > 0
&& (s->c == K_S_LEFT || s->c == K_C_LEFT
|| (mod_mask & (MOD_MASK_SHIFT|MOD_MASK_CTRL)))
&& ccline.cmdbuff[ccline.cmdpos - 1] != ' ');
ccline.cmdspos = cmd_screencol(ccline.cmdpos);
if (ccline.special_char != NUL) {
putcmdline(ccline.special_char, ccline.special_shift);
}
return command_line_not_changed(s);
case K_IGNORE:
// Ignore mouse event or open_cmdwin() result.
return command_line_not_changed(s);
case K_MIDDLEDRAG:
case K_MIDDLERELEASE:
return command_line_not_changed(s); // Ignore mouse
case K_MIDDLEMOUSE:
cmdline_paste(eval_has_provider("clipboard") ? '*' : 0, true, true);
redrawcmd();
return command_line_changed(s);
case K_LEFTDRAG:
case K_LEFTRELEASE:
case K_RIGHTDRAG:
case K_RIGHTRELEASE:
// Ignore drag and release events when the button-down wasn't
// seen before.
if (s->ignore_drag_release) {
return command_line_not_changed(s);
}
FALLTHROUGH;
case K_LEFTMOUSE:
case K_RIGHTMOUSE:
command_line_left_right_mouse(s);
return command_line_not_changed(s);
// Mouse scroll wheel: ignored here
case K_MOUSEDOWN:
case K_MOUSEUP:
case K_MOUSELEFT:
case K_MOUSERIGHT:
// Alternate buttons ignored here
case K_X1MOUSE:
case K_X1DRAG:
case K_X1RELEASE:
case K_X2MOUSE:
case K_X2DRAG:
case K_X2RELEASE:
case K_MOUSEMOVE:
return command_line_not_changed(s);
case K_SELECT: // end of Select mode mapping - ignore
return command_line_not_changed(s);
case Ctrl_B: // begin of command line
case K_HOME:
case K_KHOME:
case K_S_HOME:
case K_C_HOME:
ccline.cmdpos = 0;
ccline.cmdspos = cmd_startcol();
return command_line_not_changed(s);
case Ctrl_E: // end of command line
case K_END:
case K_KEND:
case K_S_END:
case K_C_END:
ccline.cmdpos = ccline.cmdlen;
ccline.cmdspos = cmd_screencol(ccline.cmdpos);
return command_line_not_changed(s);
case Ctrl_A: // all matches
if (cmdline_pum_active()) {
// As Ctrl-A completes all the matches, close the popup
// menu (if present)
cmdline_pum_cleanup(&ccline);
}
if (nextwild(&s->xpc, WILD_ALL, 0, s->firstc != '@') == FAIL) {
break;
}
s->xpc.xp_context = EXPAND_NOTHING;
s->did_wild_list = false;
return command_line_changed(s);
case Ctrl_L:
if (may_add_char_to_search(s->firstc, &s->c, &s->is_state) == OK) {
return command_line_not_changed(s);
}
// completion: longest common part
if (nextwild(&s->xpc, WILD_LONGEST, 0, s->firstc != '@') == FAIL) {
break;
}
return command_line_changed(s);
case Ctrl_N: // next match
case Ctrl_P: // previous match
if (s->xpc.xp_numfiles > 0) {
if (nextwild(&s->xpc, (s->c == Ctrl_P) ? WILD_PREV : WILD_NEXT,
0, s->firstc != '@') == FAIL) {
break;
}
return command_line_not_changed(s);
}
FALLTHROUGH;
case K_UP:
case K_DOWN:
case K_S_UP:
case K_S_DOWN:
case K_PAGEUP:
case K_KPAGEUP:
case K_PAGEDOWN:
case K_KPAGEDOWN:
return command_line_browse_history(s);
case Ctrl_G: // next match
case Ctrl_T: // previous match