/
ui.c
1269 lines (1164 loc) · 30 KB
/
ui.c
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/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* ui.c: functions that handle the user interface.
* 1. Keyboard input stuff, and a bit of windowing stuff. These are called
* before the machine specific stuff (mch_*) so that we can call the GUI
* stuff instead if the GUI is running.
* 2. Input buffer stuff.
*/
#include "vim.h"
void
ui_write(char_u *s, int len, int console UNUSED)
{
#ifdef FEAT_GUI
if (gui.in_use && !gui.dying && !gui.starting
# ifndef NO_CONSOLE
&& !console
# endif
)
{
gui_write(s, len);
if (p_wd)
gui_wait_for_chars(p_wd, typebuf.tb_change_cnt);
return;
}
#endif
#ifndef NO_CONSOLE
// Don't output anything in silent mode ("ex -s") unless 'verbose' set
if (!(silent_mode && p_verbose == 0))
{
# if !defined(MSWIN)
char_u *tofree = NULL;
if (output_conv.vc_type != CONV_NONE)
{
// Convert characters from 'encoding' to 'termencoding'.
tofree = string_convert(&output_conv, s, &len);
if (tofree != NULL)
s = tofree;
}
# endif
mch_write(s, len);
# if defined(HAVE_FSYNC)
if (console && s[len - 1] == '\n')
vim_fsync(1);
# endif
# if !defined(MSWIN)
if (output_conv.vc_type != CONV_NONE)
vim_free(tofree);
# endif
}
#endif
}
#if defined(UNIX) || defined(VMS) || defined(PROTO) || defined(MSWIN)
/*
* When executing an external program, there may be some typed characters that
* are not consumed by it. Give them back to ui_inchar() and they are stored
* here for the next call.
*/
static char_u *ta_str = NULL;
static int ta_off; // offset for next char to use when ta_str != NULL
static int ta_len; // length of ta_str when it's not NULL
void
ui_inchar_undo(char_u *s, int len)
{
char_u *new;
int newlen;
newlen = len;
if (ta_str != NULL)
newlen += ta_len - ta_off;
new = alloc(newlen);
if (new == NULL)
return;
if (ta_str != NULL)
{
mch_memmove(new, ta_str + ta_off, (size_t)(ta_len - ta_off));
mch_memmove(new + ta_len - ta_off, s, (size_t)len);
vim_free(ta_str);
}
else
mch_memmove(new, s, (size_t)len);
ta_str = new;
ta_len = newlen;
ta_off = 0;
}
#endif
/*
* ui_inchar(): low level input function.
* Get characters from the keyboard.
* Return the number of characters that are available.
* If "wtime" == 0 do not wait for characters.
* If "wtime" == -1 wait forever for characters.
* If "wtime" > 0 wait "wtime" milliseconds for a character.
*
* "tb_change_cnt" is the value of typebuf.tb_change_cnt if "buf" points into
* it. When typebuf.tb_change_cnt changes (e.g., when a message is received
* from a remote client) "buf" can no longer be used. "tb_change_cnt" is NULL
* otherwise.
*/
int
ui_inchar(
char_u *buf,
int maxlen,
long wtime, // don't use "time", MIPS cannot handle it
int tb_change_cnt)
{
int retval = 0;
#if defined(FEAT_GUI) && (defined(UNIX) || defined(VMS))
/*
* Use the typeahead if there is any.
*/
if (ta_str != NULL)
{
if (maxlen >= ta_len - ta_off)
{
mch_memmove(buf, ta_str + ta_off, (size_t)ta_len);
VIM_CLEAR(ta_str);
return ta_len;
}
mch_memmove(buf, ta_str + ta_off, (size_t)maxlen);
ta_off += maxlen;
return maxlen;
}
#endif
#ifdef FEAT_PROFILE
if (do_profiling == PROF_YES && wtime != 0)
prof_inchar_enter();
#endif
#ifdef NO_CONSOLE_INPUT
// Don't wait for character input when the window hasn't been opened yet.
// Do try reading, this works when redirecting stdin from a file.
// Must return something, otherwise we'll loop forever. If we run into
// this very often we probably got stuck, exit Vim.
if (no_console_input())
{
static int count = 0;
# ifndef NO_CONSOLE
retval = mch_inchar(buf, maxlen, wtime, tb_change_cnt);
if (retval > 0 || typebuf_changed(tb_change_cnt) || wtime >= 0)
goto theend;
# endif
if (wtime == -1 && ++count == 1000)
read_error_exit();
buf[0] = CAR;
retval = 1;
goto theend;
}
#endif
// If we are going to wait for some time or block...
if (wtime == -1 || wtime > 100L)
{
// ... allow signals to kill us.
(void)vim_handle_signal(SIGNAL_UNBLOCK);
// ... there is no need for CTRL-C to interrupt something, don't let
// it set got_int when it was mapped.
if ((mapped_ctrl_c | curbuf->b_mapped_ctrl_c) & get_real_state())
ctrl_c_interrupts = FALSE;
}
/*
* Here we call gui_inchar() or mch_inchar(), the GUI or machine-dependent
* input function. The functionality they implement is like this:
*
* while (not timed out)
* {
* handle-resize;
* parse-queued-messages;
* if (waited for 'updatetime')
* trigger-cursorhold;
* ui_wait_for_chars_or_timer()
* if (character available)
* break;
* }
*
* ui_wait_for_chars_or_timer() does:
*
* while (not timed out)
* {
* if (any-timer-triggered)
* invoke-timer-callback;
* wait-for-character();
* if (character available)
* break;
* }
*
* wait-for-character() does:
* while (not timed out)
* {
* Wait for event;
* if (something on channel)
* read/write channel;
* else if (resized)
* handle_resize();
* else if (system event)
* deal-with-system-event;
* else if (character available)
* break;
* }
*
*/
#ifdef FEAT_GUI
if (gui.in_use)
retval = gui_inchar(buf, maxlen, wtime, tb_change_cnt);
#endif
#ifndef NO_CONSOLE
# ifdef FEAT_GUI
else
# endif
retval = mch_inchar(buf, maxlen, wtime, tb_change_cnt);
#endif
if (wtime == -1 || wtime > 100L)
// block SIGHUP et al.
(void)vim_handle_signal(SIGNAL_BLOCK);
ctrl_c_interrupts = TRUE;
#ifdef NO_CONSOLE_INPUT
theend:
#endif
#ifdef FEAT_PROFILE
if (do_profiling == PROF_YES && wtime != 0)
prof_inchar_exit();
#endif
return retval;
}
#if defined(UNIX) || defined(VMS) || defined(FEAT_GUI) || defined(PROTO)
/*
* Common code for mch_inchar() and gui_inchar(): Wait for a while or
* indefinitely until characters are available, dealing with timers and
* messages on channels.
*
* "buf" may be NULL if the available characters are not to be returned, only
* check if they are available.
*
* Return the number of characters that are available.
* If "wtime" == 0 do not wait for characters.
* If "wtime" == n wait a short time for characters.
* If "wtime" == -1 wait forever for characters.
*/
int
inchar_loop(
char_u *buf,
int maxlen,
long wtime, // don't use "time", MIPS cannot handle it
int tb_change_cnt,
int (*wait_func)(long wtime, int *interrupted, int ignore_input),
int (*resize_func)(int check_only))
{
int len;
int interrupted = FALSE;
int did_call_wait_func = FALSE;
int did_start_blocking = FALSE;
long wait_time;
long elapsed_time = 0;
#ifdef ELAPSED_FUNC
elapsed_T start_tv;
ELAPSED_INIT(start_tv);
#endif
// repeat until we got a character or waited long enough
for (;;)
{
// Check if window changed size while we were busy, perhaps the ":set
// columns=99" command was used.
if (resize_func != NULL)
resize_func(FALSE);
#ifdef MESSAGE_QUEUE
// Only process messages when waiting.
if (wtime != 0)
{
parse_queued_messages();
// If input was put directly in typeahead buffer bail out here.
if (typebuf_changed(tb_change_cnt))
return 0;
}
#endif
if (wtime < 0 && did_start_blocking)
// blocking and already waited for p_ut
wait_time = -1;
else
{
if (wtime >= 0)
wait_time = wtime;
else
// going to block after p_ut
wait_time = p_ut;
#ifdef ELAPSED_FUNC
elapsed_time = ELAPSED_FUNC(start_tv);
#endif
wait_time -= elapsed_time;
// If the waiting time is now zero or less, we timed out. However,
// loop at least once to check for characters and events. Matters
// when "wtime" is zero.
if (wait_time <= 0 && did_call_wait_func)
{
if (wtime >= 0)
// no character available within "wtime"
return 0;
// No character available within 'updatetime'.
did_start_blocking = TRUE;
if (trigger_cursorhold() && maxlen >= 3
&& !typebuf_changed(tb_change_cnt))
{
// Put K_CURSORHOLD in the input buffer or return it.
if (buf == NULL)
{
char_u ibuf[3];
ibuf[0] = CSI;
ibuf[1] = KS_EXTRA;
ibuf[2] = (int)KE_CURSORHOLD;
add_to_input_buf(ibuf, 3);
}
else
{
buf[0] = K_SPECIAL;
buf[1] = KS_EXTRA;
buf[2] = (int)KE_CURSORHOLD;
}
return 3;
}
// There is no character available within 'updatetime' seconds:
// flush all the swap files to disk. Also done when
// interrupted by SIGWINCH.
before_blocking();
continue;
}
}
#ifdef FEAT_JOB_CHANNEL
if (wait_time < 0 || wait_time > 100L)
{
// Checking if a job ended requires polling. Do this at least
// every 100 msec.
if (has_pending_job())
wait_time = 100L;
// If there is readahead then parse_queued_messages() timed out and
// we should call it again soon.
if (channel_any_readahead())
wait_time = 10L;
}
#endif
#ifdef FEAT_BEVAL_GUI
if (p_beval && wait_time > 100L)
// The 'balloonexpr' may indirectly invoke a callback while waiting
// for a character, need to check often.
wait_time = 100L;
#endif
// Wait for a character to be typed or another event, such as the winch
// signal or an event on the monitored file descriptors.
did_call_wait_func = TRUE;
if (wait_func(wait_time, &interrupted, FALSE))
{
// If input was put directly in typeahead buffer bail out here.
if (typebuf_changed(tb_change_cnt))
return 0;
// We might have something to return now.
if (buf == NULL)
// "buf" is NULL, we were just waiting, not actually getting
// input.
return input_available();
len = read_from_input_buf(buf, (long)maxlen);
if (len > 0)
return len;
continue;
}
// Timed out or interrupted with no character available.
#ifndef ELAPSED_FUNC
// estimate the elapsed time
elapsed_time += wait_time;
#endif
if ((resize_func != NULL && resize_func(TRUE))
#if defined(FEAT_CLIENTSERVER) && defined(UNIX)
|| server_waiting()
#endif
#ifdef MESSAGE_QUEUE
|| interrupted
#endif
|| wait_time > 0
|| (wtime < 0 && !did_start_blocking))
// no character available, but something to be done, keep going
continue;
// no character available or interrupted, return zero
break;
}
return 0;
}
#endif
#if defined(FEAT_TIMERS) || defined(PROTO)
/*
* Wait for a timer to fire or "wait_func" to return non-zero.
* Returns OK when something was read.
* Returns FAIL when it timed out or was interrupted.
*/
int
ui_wait_for_chars_or_timer(
long wtime,
int (*wait_func)(long wtime, int *interrupted, int ignore_input),
int *interrupted,
int ignore_input)
{
int due_time;
long remaining = wtime;
int tb_change_cnt = typebuf.tb_change_cnt;
# ifdef FEAT_JOB_CHANNEL
int brief_wait = FALSE;
# endif
// When waiting very briefly don't trigger timers.
if (wtime >= 0 && wtime < 10L)
return wait_func(wtime, NULL, ignore_input);
while (wtime < 0 || remaining > 0)
{
// Trigger timers and then get the time in wtime until the next one is
// due. Wait up to that time.
due_time = check_due_timer();
if (typebuf.tb_change_cnt != tb_change_cnt)
{
// timer may have used feedkeys()
return FAIL;
}
if (due_time <= 0 || (wtime > 0 && due_time > remaining))
due_time = remaining;
# if defined(FEAT_JOB_CHANNEL) || defined(FEAT_SOUND_CANBERRA) || defined(FEAT_SOUND_MACOSX)
if ((due_time < 0 || due_time > 10L) && (
# if defined(FEAT_JOB_CHANNEL)
(
# if defined(FEAT_GUI)
!gui.in_use &&
# endif
(has_pending_job() || channel_any_readahead()))
# if defined(FEAT_SOUND_CANBERRA) || defined(FEAT_SOUND_MACOSX)
||
# endif
# endif
# if defined(FEAT_SOUND_CANBERRA) || defined(FEAT_SOUND_MACOSX)
has_any_sound_callback()
# endif
))
{
// There is a pending job or channel, should return soon in order
// to handle them ASAP. Do check for input briefly.
due_time = 10L;
# ifdef FEAT_JOB_CHANNEL
brief_wait = TRUE;
# endif
}
# endif
if (wait_func(due_time, interrupted, ignore_input))
return OK;
if ((interrupted != NULL && *interrupted)
# ifdef FEAT_JOB_CHANNEL
|| brief_wait
# endif
)
// Nothing available, but need to return so that side effects get
// handled, such as handling a message on a channel.
return FAIL;
if (wtime > 0)
remaining -= due_time;
}
return FAIL;
}
#endif
/*
* Return non-zero if a character is available.
*/
int
ui_char_avail(void)
{
#ifdef FEAT_GUI
if (gui.in_use)
{
gui_mch_update();
return input_available();
}
#endif
#ifndef NO_CONSOLE
# ifdef NO_CONSOLE_INPUT
if (no_console_input())
return 0;
# endif
return mch_char_avail();
#else
return 0;
#endif
}
/*
* Delay for the given number of milliseconds. If ignoreinput is FALSE then we
* cancel the delay if a key is hit.
*/
void
ui_delay(long msec_arg, int ignoreinput)
{
long msec = msec_arg;
#ifdef FEAT_EVAL
if (ui_delay_for_testing > 0)
msec = ui_delay_for_testing;
ch_log(NULL, "ui_delay(%ld)", msec);
#endif
#ifdef FEAT_GUI
if (gui.in_use && !ignoreinput)
gui_wait_for_chars(msec, typebuf.tb_change_cnt);
else
#endif
mch_delay(msec, ignoreinput ? MCH_DELAY_IGNOREINPUT : 0);
}
/*
* If the machine has job control, use it to suspend the program,
* otherwise fake it by starting a new shell.
* When running the GUI iconify the window.
*/
void
ui_suspend(void)
{
#ifdef FEAT_GUI
if (gui.in_use)
{
gui_mch_iconify();
return;
}
#endif
mch_suspend();
}
#if !defined(UNIX) || !defined(SIGTSTP) || defined(PROTO)
/*
* When the OS can't really suspend, call this function to start a shell.
* This is never called in the GUI.
*/
void
suspend_shell(void)
{
if (*p_sh == NUL)
emsg(_(e_shell_option_is_empty));
else
{
msg_puts(_("new shell started\n"));
do_shell(NULL, 0);
}
}
#endif
/*
* Try to get the current Vim shell size. Put the result in Rows and Columns.
* Use the new sizes as defaults for 'columns' and 'lines'.
* Return OK when size could be determined, FAIL otherwise.
*/
int
ui_get_shellsize(void)
{
int retval;
#ifdef FEAT_GUI
if (gui.in_use)
retval = gui_get_shellsize();
else
#endif
retval = mch_get_shellsize();
check_shellsize();
// adjust the default for 'lines' and 'columns'
if (retval == OK)
{
set_number_default("lines", Rows);
set_number_default("columns", Columns);
}
return retval;
}
/*
* Set the size of the Vim shell according to Rows and Columns, if possible.
* The gui_set_shellsize() or mch_set_shellsize() function will try to set the
* new size. If this is not possible, it will adjust Rows and Columns.
*/
void
ui_set_shellsize(
int mustset UNUSED) // set by the user
{
#ifdef FEAT_GUI
if (gui.in_use)
gui_set_shellsize(mustset, TRUE, RESIZE_BOTH);
else
#endif
mch_set_shellsize();
}
/*
* Called when Rows and/or Columns changed. Adjust scroll region and mouse
* region.
*/
void
ui_new_shellsize(void)
{
if (full_screen && !exiting)
{
#ifdef FEAT_GUI
if (gui.in_use)
gui_new_shellsize();
else
#endif
mch_new_shellsize();
}
}
#if ((defined(FEAT_EVAL) || defined(FEAT_TERMINAL)) \
&& (defined(FEAT_GUI) \
|| defined(MSWIN) \
|| (defined(HAVE_TGETENT) && defined(FEAT_TERMRESPONSE)))) \
|| defined(PROTO)
/*
* Get the window position in pixels, if possible.
* Return FAIL when not possible.
*/
int
ui_get_winpos(int *x, int *y, varnumber_T timeout UNUSED)
{
# ifdef FEAT_GUI
if (gui.in_use)
return gui_mch_get_winpos(x, y);
# endif
# if defined(MSWIN) && (!defined(FEAT_GUI) || defined(VIMDLL))
return mch_get_winpos(x, y);
# else
# if defined(HAVE_TGETENT) && defined(FEAT_TERMRESPONSE)
return term_get_winpos(x, y, timeout);
# else
return FAIL;
# endif
# endif
}
#endif
void
ui_breakcheck(void)
{
ui_breakcheck_force(FALSE);
}
/*
* When "force" is true also check when the terminal is not in raw mode.
* This is useful to read input on channels.
*/
void
ui_breakcheck_force(int force)
{
static int recursive = FALSE;
int save_updating_screen = updating_screen;
// We could be called recursively if stderr is redirected, calling
// fill_input_buf() calls settmode() when stdin isn't a tty. settmode()
// calls vgetorpeek() which calls ui_breakcheck() again.
if (recursive)
return;
recursive = TRUE;
// We do not want gui_resize_shell() to redraw the screen here.
++updating_screen;
#ifdef FEAT_GUI
if (gui.in_use)
gui_mch_update();
else
#endif
mch_breakcheck(force);
if (save_updating_screen)
updating_screen = TRUE;
else
after_updating_screen(FALSE);
recursive = FALSE;
}
//////////////////////////////////////////////////////////////////////////////
// Functions that handle the input buffer.
// This is used for any GUI version, and the unix terminal version.
//
// For Unix, the input characters are buffered to be able to check for a
// CTRL-C. This should be done with signals, but I don't know how to do that
// in a portable way for a tty in RAW mode.
//
// For the client-server code in the console the received keys are put in the
// input buffer.
#if defined(USE_INPUT_BUF) || defined(PROTO)
/*
* Internal typeahead buffer. Includes extra space for long key code
* descriptions which would otherwise overflow. The buffer is considered full
* when only this extra space (or part of it) remains.
*/
#if defined(FEAT_JOB_CHANNEL) || defined(FEAT_CLIENTSERVER)
/*
* NetBeans stuffs debugger commands into the input buffer.
* This requires a larger buffer...
* (Madsen) Go with this for remote input as well ...
*/
# define INBUFLEN 4096
#else
# define INBUFLEN 250
#endif
static char_u inbuf[INBUFLEN + MAX_KEY_CODE_LEN];
static int inbufcount = 0; // number of chars in inbuf[]
/*
* vim_is_input_buf_full(), vim_is_input_buf_empty(), add_to_input_buf(), and
* trash_input_buf() are functions for manipulating the input buffer. These
* are used by the gui_* calls when a GUI is used to handle keyboard input.
*/
int
vim_is_input_buf_full(void)
{
return (inbufcount >= INBUFLEN);
}
int
vim_is_input_buf_empty(void)
{
return (inbufcount == 0);
}
#if defined(FEAT_OLE) || defined(PROTO)
int
vim_free_in_input_buf(void)
{
return (INBUFLEN - inbufcount);
}
#endif
#if defined(FEAT_GUI_GTK) || defined(PROTO)
int
vim_used_in_input_buf(void)
{
return inbufcount;
}
#endif
/*
* Return the current contents of the input buffer and make it empty.
* The returned pointer must be passed to set_input_buf() later.
*/
char_u *
get_input_buf(void)
{
garray_T *gap;
// We use a growarray to store the data pointer and the length.
gap = ALLOC_ONE(garray_T);
if (gap != NULL)
{
// Add one to avoid a zero size.
gap->ga_data = alloc(inbufcount + 1);
if (gap->ga_data != NULL)
mch_memmove(gap->ga_data, inbuf, (size_t)inbufcount);
gap->ga_len = inbufcount;
}
trash_input_buf();
return (char_u *)gap;
}
/*
* Restore the input buffer with a pointer returned from get_input_buf().
* The allocated memory is freed, this only works once!
* When "overwrite" is FALSE input typed later is kept.
*/
void
set_input_buf(char_u *p, int overwrite)
{
garray_T *gap = (garray_T *)p;
if (gap == NULL)
return;
if (gap->ga_data != NULL)
{
if (overwrite || inbufcount + gap->ga_len >= INBUFLEN)
{
mch_memmove(inbuf, gap->ga_data, gap->ga_len);
inbufcount = gap->ga_len;
}
else
{
mch_memmove(inbuf + gap->ga_len, inbuf, inbufcount);
mch_memmove(inbuf, gap->ga_data, gap->ga_len);
inbufcount += gap->ga_len;
}
vim_free(gap->ga_data);
}
vim_free(gap);
}
/*
* Add the given bytes to the input buffer
* Special keys start with CSI. A real CSI must have been translated to
* CSI KS_EXTRA KE_CSI. K_SPECIAL doesn't require translation.
*/
void
add_to_input_buf(char_u *s, int len)
{
if (inbufcount + len > INBUFLEN + MAX_KEY_CODE_LEN)
return; // Shouldn't ever happen!
while (len--)
inbuf[inbufcount++] = *s++;
}
/*
* Add "str[len]" to the input buffer while escaping CSI bytes.
*/
void
add_to_input_buf_csi(char_u *str, int len)
{
int i;
char_u buf[2];
for (i = 0; i < len; ++i)
{
add_to_input_buf(str + i, 1);
if (str[i] == CSI)
{
// Turn CSI into K_CSI.
buf[0] = KS_EXTRA;
buf[1] = (int)KE_CSI;
add_to_input_buf(buf, 2);
}
}
}
/*
* Remove everything from the input buffer. Called when ^C is found.
*/
void
trash_input_buf(void)
{
inbufcount = 0;
}
/*
* Read as much data from the input buffer as possible up to maxlen, and store
* it in buf.
*/
int
read_from_input_buf(char_u *buf, long maxlen)
{
if (inbufcount == 0) // if the buffer is empty, fill it
fill_input_buf(TRUE);
if (maxlen > inbufcount)
maxlen = inbufcount;
mch_memmove(buf, inbuf, (size_t)maxlen);
inbufcount -= maxlen;
// check "maxlen" to avoid clang warning
if (inbufcount > 0 && maxlen > 0)
mch_memmove(inbuf, inbuf + maxlen, (size_t)inbufcount);
return (int)maxlen;
}
void
fill_input_buf(int exit_on_error UNUSED)
{
#if defined(UNIX) || defined(VMS) || defined(MACOS_X)
int len;
int try;
static int did_read_something = FALSE;
static char_u *rest = NULL; // unconverted rest of previous read
static int restlen = 0;
int unconverted;
#endif
#ifdef FEAT_GUI
if (gui.in_use
# ifdef NO_CONSOLE_INPUT
// Don't use the GUI input when the window hasn't been opened yet.
// We get here from ui_inchar() when we should try reading from stdin.
&& !no_console_input()
# endif
)
{
gui_mch_update();
return;
}
#endif
#if defined(UNIX) || defined(VMS) || defined(MACOS_X)
if (vim_is_input_buf_full())
return;
/*
* Fill_input_buf() is only called when we really need a character.
* If we can't get any, but there is some in the buffer, just return.
* If we can't get any, and there isn't any in the buffer, we give up and
* exit Vim.
*/
if (rest != NULL)
{
// Use remainder of previous call, starts with an invalid character
// that may become valid when reading more.
if (restlen > INBUFLEN - inbufcount)
unconverted = INBUFLEN - inbufcount;
else
unconverted = restlen;
mch_memmove(inbuf + inbufcount, rest, unconverted);
if (unconverted == restlen)
VIM_CLEAR(rest);
else
{
restlen -= unconverted;
mch_memmove(rest, rest + unconverted, restlen);
}
inbufcount += unconverted;
}
else
unconverted = 0;
len = 0; // to avoid gcc warning
for (try = 0; try < 100; ++try)
{
size_t readlen = (size_t)((INBUFLEN - inbufcount)
/ input_conv.vc_factor);
# ifdef VMS
len = vms_read((char *)inbuf + inbufcount, readlen);
# else
len = read(read_cmd_fd, (char *)inbuf + inbufcount, readlen);
# endif
# ifdef FEAT_EVAL
if (len > 0)
{
inbuf[inbufcount + len] = NUL;
ch_log(NULL, "raw key input: \"%s\"", inbuf + inbufcount);
}
# endif
if (len > 0 || got_int)
break;
/*
* If reading stdin results in an error, continue reading stderr.
* This helps when using "foo | xargs vim".
*/
if (!did_read_something && !isatty(read_cmd_fd) && read_cmd_fd == 0)
{
int m = cur_tmode;
// We probably set the wrong file descriptor to raw mode. Switch
// back to cooked mode, use another descriptor and set the mode to
// what it was.
settmode(TMODE_COOK);
#ifdef HAVE_DUP
// Use stderr for stdin, also works for shell commands.
close(0);
vim_ignored = dup(2);
#else
read_cmd_fd = 2; // read from stderr instead of stdin
#endif
settmode(m);
}
if (!exit_on_error)