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// 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
#include <assert.h>
#include "nvim/lib/kvec.h"
#include "nvim/ascii.h"
#include "nvim/log.h"
#include "nvim/state.h"
#include "nvim/vim.h"
#include "nvim/main.h"
#include "nvim/getchar.h"
#include "nvim/option_defs.h"
#include "nvim/ui.h"
#include "nvim/os/input.h"
#include "nvim/ex_docmd.h"
#include "nvim/edit.h"
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "state.c.generated.h"
#endif
void state_enter(VimState *s)
{
for (;;) {
int check_result = s->check ? s->check(s) : 1;
if (!check_result) {
break; // Terminate this state.
} else if (check_result == -1) {
continue; // check() again.
}
// Execute this state.
int key;
getkey:
if (char_avail() || using_script() || input_available()) {
// Don't block for events if there's a character already available for
// processing. Characters can come from mappings, scripts and other
// sources, so this scenario is very common.
key = safe_vgetc();
} else if (!multiqueue_empty(main_loop.events)) {
// Event was made available after the last multiqueue_process_events call
key = K_EVENT;
} else {
input_enable_events();
// Flush screen updates before blocking
ui_flush();
// Call `os_inchar` directly to block for events or user input without
// consuming anything from `input_buffer`(os/input.c) or calling the
// mapping engine.
(void)os_inchar(NULL, 0, -1, 0);
input_disable_events();
// If an event was put into the queue, we send K_EVENT directly.
key = !multiqueue_empty(main_loop.events)
? K_EVENT
: safe_vgetc();
}
if (key == K_EVENT) {
may_sync_undo();
}
#if MIN_LOG_LEVEL <= DEBUG_LOG_LEVEL
char *keyname = key == K_EVENT
? "K_EVENT" : (char *)get_special_key_name(key, mod_mask);
DLOG("input: %s", keyname);
#endif
int execute_result = s->execute(s, key);
if (!execute_result) {
break;
} else if (execute_result == -1) {
goto getkey;
}
}
}
/// Return true if in the current mode we need to use virtual.
bool virtual_active(void)
{
// While an operator is being executed we return "virtual_op", because
// VIsual_active has already been reset, thus we can't check for "block"
// being used.
if (virtual_op != kNone) {
return virtual_op;
}
return ve_flags == VE_ALL
|| ((ve_flags & VE_BLOCK) && VIsual_active && VIsual_mode == Ctrl_V)
|| ((ve_flags & VE_INSERT) && (State & INSERT));
}
/// VISUAL, SELECTMODE and OP_PENDING State are never set, they are equal to
/// NORMAL State with a condition. This function returns the real State.
int get_real_state(void)
{
if (State & NORMAL) {
if (VIsual_active) {
if (VIsual_select) {
return SELECTMODE;
}
return VISUAL;
} else if (finish_op) {
return OP_PENDING;
}
}
return State;
}
/// @returns[allocated] mode string
char *get_mode(void)
{
char *buf = xcalloc(3, sizeof(char));
if (VIsual_active) {
if (VIsual_select) {
buf[0] = (char)(VIsual_mode + 's' - 'v');
} else {
buf[0] = (char)VIsual_mode;
}
} else if (State == HITRETURN || State == ASKMORE || State == SETWSIZE
|| State == CONFIRM) {
buf[0] = 'r';
if (State == ASKMORE) {
buf[1] = 'm';
} else if (State == CONFIRM) {
buf[1] = '?';
}
} else if (State == EXTERNCMD) {
buf[0] = '!';
} else if (State & INSERT) {
if (State & VREPLACE_FLAG) {
buf[0] = 'R';
buf[1] = 'v';
} else {
if (State & REPLACE_FLAG) {
buf[0] = 'R';
} else {
buf[0] = 'i';
}
if (ins_compl_active()) {
buf[1] = 'c';
} else if (ctrl_x_mode == 1) {
buf[1] = 'x';
}
}
} else if ((State & CMDLINE) || exmode_active) {
buf[0] = 'c';
if (exmode_active == EXMODE_VIM) {
buf[1] = 'v';
} else if (exmode_active == EXMODE_NORMAL) {
buf[1] = 'e';
}
} else if (State & TERM_FOCUS) {
buf[0] = 't';
} else {
buf[0] = 'n';
if (finish_op) {
buf[1] = 'o';
}
}
return buf;
}
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