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Cosmo/util/linenoise-win32.c
CPunch cc9eb4a5ec lol oops
2023-09-01 17:16:10 -05:00

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9.5 KiB
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/* this code is not standalone
* it is included into linenoise.c
* for windows.
* It is deliberately kept separate so that
* applications that have no need for windows
* support can omit this
*/
static DWORD orig_consolemode = 0;
static int flushOutput(struct current *current);
static void outputNewline(struct current *current);
static void refreshStart(struct current *current)
{
(void)current;
}
static void refreshEnd(struct current *current)
{
(void)current;
}
static void refreshStartChars(struct current *current)
{
assert(current->output == NULL);
/* We accumulate all output here */
current->output = sb_alloc();
#ifdef USE_UTF8
current->ubuflen = 0;
#endif
}
static void refreshNewline(struct current *current)
{
DRL("<nl>");
outputNewline(current);
}
static void refreshEndChars(struct current *current)
{
assert(current->output);
flushOutput(current);
sb_free(current->output);
current->output = NULL;
}
static int enableRawMode(struct current *current) {
DWORD n;
INPUT_RECORD irec;
current->outh = GetStdHandle(STD_OUTPUT_HANDLE);
current->inh = GetStdHandle(STD_INPUT_HANDLE);
if (!PeekConsoleInput(current->inh, &irec, 1, &n)) {
return -1;
}
if (getWindowSize(current) != 0) {
return -1;
}
if (GetConsoleMode(current->inh, &orig_consolemode)) {
SetConsoleMode(current->inh, ENABLE_PROCESSED_INPUT);
}
#ifdef USE_UTF8
/* XXX is this the right thing to do? */
SetConsoleCP(65001);
#endif
return 0;
}
static void disableRawMode(struct current *current)
{
SetConsoleMode(current->inh, orig_consolemode);
}
void linenoiseClearScreen(void)
{
/* XXX: This is ugly. Should just have the caller pass a handle */
struct current current;
current.outh = GetStdHandle(STD_OUTPUT_HANDLE);
if (getWindowSize(&current) == 0) {
COORD topleft = { 0, 0 };
DWORD n;
FillConsoleOutputCharacter(current.outh, ' ',
current.cols * current.rows, topleft, &n);
FillConsoleOutputAttribute(current.outh,
FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_GREEN,
current.cols * current.rows, topleft, &n);
SetConsoleCursorPosition(current.outh, topleft);
}
}
static void cursorToLeft(struct current *current)
{
COORD pos;
DWORD n;
pos.X = 0;
pos.Y = (SHORT)current->y;
FillConsoleOutputAttribute(current->outh,
FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_GREEN, current->cols, pos, &n);
current->x = 0;
}
#ifdef USE_UTF8
static void flush_ubuf(struct current *current)
{
COORD pos;
DWORD nwritten;
pos.Y = (SHORT)current->y;
pos.X = (SHORT)current->x;
SetConsoleCursorPosition(current->outh, pos);
WriteConsoleW(current->outh, current->ubuf, current->ubuflen, &nwritten, 0);
current->x += current->ubufcols;
current->ubuflen = 0;
current->ubufcols = 0;
}
static void add_ubuf(struct current *current, int ch)
{
/* This code originally by: Author: Mark E. Davis, 1994. */
static const int halfShift = 10; /* used for shifting by 10 bits */
static const DWORD halfBase = 0x0010000UL;
static const DWORD halfMask = 0x3FFUL;
#define UNI_SUR_HIGH_START 0xD800
#define UNI_SUR_HIGH_END 0xDBFF
#define UNI_SUR_LOW_START 0xDC00
#define UNI_SUR_LOW_END 0xDFFF
#define UNI_MAX_BMP 0x0000FFFF
if (ch > UNI_MAX_BMP) {
/* convert from unicode to utf16 surrogate pairs
* There is always space for one extra word in ubuf
*/
ch -= halfBase;
current->ubuf[current->ubuflen++] = (WORD)((ch >> halfShift) + UNI_SUR_HIGH_START);
current->ubuf[current->ubuflen++] = (WORD)((ch & halfMask) + UNI_SUR_LOW_START);
}
else {
current->ubuf[current->ubuflen++] = ch;
}
current->ubufcols += utf8_width(ch);
if (current->ubuflen >= UBUF_MAX_CHARS) {
flush_ubuf(current);
}
}
#endif
static int flushOutput(struct current *current)
{
const char *pt = sb_str(current->output);
int len = sb_len(current->output);
#ifdef USE_UTF8
/* convert utf8 in current->output into utf16 in current->ubuf
*/
while (len) {
int ch;
int n = utf8_tounicode(pt, &ch);
pt += n;
len -= n;
add_ubuf(current, ch);
}
flush_ubuf(current);
#else
DWORD nwritten;
COORD pos;
pos.Y = (SHORT)current->y;
pos.X = (SHORT)current->x;
SetConsoleCursorPosition(current->outh, pos);
WriteConsoleA(current->outh, pt, len, &nwritten, 0);
current->x += len;
#endif
sb_clear(current->output);
return 0;
}
static int outputChars(struct current *current, const char *buf, int len)
{
if (len < 0) {
len = strlen(buf);
}
assert(current->output);
sb_append_len(current->output, buf, len);
return 0;
}
static void outputNewline(struct current *current)
{
/* On the last row output a newline to force a scroll */
if (current->y + 1 == current->rows) {
outputChars(current, "\n", 1);
}
flushOutput(current);
current->x = 0;
current->y++;
}
static void setOutputHighlight(struct current *current, const int *props, int nprops)
{
int colour = FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_GREEN;
int bold = 0;
int reverse = 0;
int i;
for (i = 0; i < nprops; i++) {
switch (props[i]) {
case 0:
colour = FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_GREEN;
bold = 0;
reverse = 0;
break;
case 1:
bold = FOREGROUND_INTENSITY;
break;
case 7:
reverse = 1;
break;
case 30:
colour = 0;
break;
case 31:
colour = FOREGROUND_RED;
break;
case 32:
colour = FOREGROUND_GREEN;
break;
case 33:
colour = FOREGROUND_RED | FOREGROUND_GREEN;
break;
case 34:
colour = FOREGROUND_BLUE;
break;
case 35:
colour = FOREGROUND_RED | FOREGROUND_BLUE;
break;
case 36:
colour = FOREGROUND_BLUE | FOREGROUND_GREEN;
break;
case 37:
colour = FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_GREEN;
break;
}
}
flushOutput(current);
if (reverse) {
SetConsoleTextAttribute(current->outh, BACKGROUND_INTENSITY);
}
else {
SetConsoleTextAttribute(current->outh, colour | bold);
}
}
static void eraseEol(struct current *current)
{
COORD pos;
DWORD n;
pos.X = (SHORT) current->x;
pos.Y = (SHORT) current->y;
FillConsoleOutputCharacter(current->outh, ' ', current->cols - current->x, pos, &n);
}
static void setCursorXY(struct current *current)
{
COORD pos;
pos.X = (SHORT) current->x;
pos.Y = (SHORT) current->y;
SetConsoleCursorPosition(current->outh, pos);
}
static void setCursorPos(struct current *current, int x)
{
current->x = x;
setCursorXY(current);
}
static void cursorUp(struct current *current, int n)
{
current->y -= n;
setCursorXY(current);
}
static void cursorDown(struct current *current, int n)
{
current->y += n;
setCursorXY(current);
}
static int fd_read(struct current *current)
{
while (1) {
INPUT_RECORD irec;
DWORD n;
if (WaitForSingleObject(current->inh, INFINITE) != WAIT_OBJECT_0) {
break;
}
if (!ReadConsoleInputW(current->inh, &irec, 1, &n)) {
break;
}
if (irec.EventType == KEY_EVENT) {
KEY_EVENT_RECORD *k = &irec.Event.KeyEvent;
if (k->bKeyDown || k->wVirtualKeyCode == VK_MENU) {
if (k->dwControlKeyState & ENHANCED_KEY) {
switch (k->wVirtualKeyCode) {
case VK_LEFT:
return SPECIAL_LEFT;
case VK_RIGHT:
return SPECIAL_RIGHT;
case VK_UP:
return SPECIAL_UP;
case VK_DOWN:
return SPECIAL_DOWN;
case VK_INSERT:
return SPECIAL_INSERT;
case VK_DELETE:
return SPECIAL_DELETE;
case VK_HOME:
return SPECIAL_HOME;
case VK_END:
return SPECIAL_END;
case VK_PRIOR:
return SPECIAL_PAGE_UP;
case VK_NEXT:
return SPECIAL_PAGE_DOWN;
case VK_RETURN:
return k->uChar.UnicodeChar;
}
}
/* Note that control characters are already translated in AsciiChar */
else if (k->wVirtualKeyCode == VK_CONTROL)
continue;
else {
return k->uChar.UnicodeChar;
}
}
}
}
return -1;
}
static int getWindowSize(struct current *current)
{
CONSOLE_SCREEN_BUFFER_INFO info;
if (!GetConsoleScreenBufferInfo(current->outh, &info)) {
return -1;
}
current->cols = info.dwSize.X;
current->rows = info.dwSize.Y;
if (current->cols <= 0 || current->rows <= 0) {
current->cols = 80;
return -1;
}
current->y = info.dwCursorPosition.Y;
current->x = info.dwCursorPosition.X;
return 0;
}
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