void SelectFromHistory()
{
// Change the view
// Go to the right
while((input.e - input.f) > 0)
{
input.f++;
cgaputc(KEY_RT);
}
// Delete Current line
while(input.e > input.w)
{
cgaputc(BACKSPACE);
++input.w; // Here also change the logic
}
input.e = input.w;
input.f = input.w;
input.r = input.w;
// Insert command from History
char Newc;
int j;
for(j = 0; History[HistoryPos][j] != '\0'; ++j)
{
Newc = History[HistoryPos][j];
input.buf[input.f++ % INPUT_BUF] = Newc;
++input.e;
consputc(Newc);
}
}
void
putc(int c)
{
cgaputc(c);
if(uart != -1)
uartputc(uart, c);
}
void
cgaconsputs(char* s, int n)
{
ilock(&cgalock);
while(n-- > 0)
cgaputc(*s++);
iunlock(&cgalock);
}
void
consputc(int c)
{
if(c == BACKSPACE){
uartputc('\b'); uartputc(' '); uartputc('\b');
} else
uartputc(c);
cgaputc(c);
}
void
consputc(int c)
{
if(panicked){
cli();
for(;;)
;
}
cgaputc(c);
}
static void
cgaputc(int c)
{
int i;
uchar *cga, *p;
cga = CGA;
if(c == '\n'){
cgapos = cgapos/Width;
cgapos = (cgapos+1)*Width;
}
else if(c == '\t'){
i = 8 - ((cgapos/2)&7);
while(i-- > 0)
cgaputc(' ');
}
else if(c == '\b'){
if(cgapos >= 2)
cgapos -= 2;
cgaputc(' ');
cgapos -= 2;
}
else{
cga[cgapos++] = c;
cga[cgapos++] = Attr;
}
if(cgapos >= (Width*Height)-Postlen*2){
memmove(cga, &cga[Width], Width*(Height-1));
p = &cga[Width*(Height-1)-Postlen*2];
for(i = 0; i < Width/2; i++){
*p++ = ' ';
*p++ = Attr;
}
cgapos -= Width;
}
cgacursor();
}
void
consputc(int c)
{
if(panicked){
cli();
for(;;)
;
}
if(c == BACKSPACE){
uartputc('\b'); uartputc(' '); uartputc('\b');
} else
uartputc(c);
cgaputc(c);
}
void consputc(int c) {
if (panicked) {
cli();
for (;;)
;
}
if (c == BACKSPACE) {
uartputc('\b');
uartputc(' ');
uartputc('\b');
} else if (c != KEY_LEFT && c != KEY_RIGHT)
uartputc(c);
cgaputc(c);
}
void
consoleintr(int (*getc)(void))
{
int c;
acquire(&input.lock);
while((c = getc()) >= 0){
switch(c){
case C('P'): // Process listing.
procdump();
break;
case C('U'): // Kill line.
while(input.e != input.w &&
input.buf[(input.e-1) % INPUT_BUF] != '\n'){
input.e--;
consputc(BACKSPACE);
}
break;
case C('H'): case '\x7f': // Backspace
if(input.f != input.w){
input.e--;
input.f--;
consputc(BACKSPACE);
}
break;
case KEY_LF: // Key Left
{
if(input.f != input.w)
{
input.f--;
cgaputc(KEY_LF);
}
break;
}
case KEY_RT: // Key Right
{
int IsCanRight = input.e - input.f;
if(IsCanRight > 0)
{
input.f++;
cgaputc(KEY_RT);
}
break;
}
case KEY_UP: // Key Up
{
int NextHistoryPos = (HistoryPos + MAX_HISTORY_LENGTH - 1) % MAX_HISTORY_LENGTH;
if(NextHistoryPos < MaxHistoryPos)
{
HistoryPos = NextHistoryPos;
SelectFromHistory();
}
break;
}
case KEY_DN: // Key Down
{
if(HistoryPos < MaxHistoryPos)
{
HistoryPos = (HistoryPos + 1) % MAX_HISTORY_LENGTH;
SelectFromHistory();
}
break;
}
default:
if(c != 0 && input.e-input.r < INPUT_BUF)
{
c = (c == '\r') ? '\n' : c;
if(c == '\n' || c == C('D') || input.e == input.r+INPUT_BUF)
{
// Insert Command To History
if(input.e > input.w) // if command exist
{
int j;
for(j = 0; input.w+j<input.e; ++j)
{
History[HistoryWrite][j] = input.buf[(input.w +j) % INPUT_BUF];
}
History[HistoryWrite][j] = '\0';
HistoryWrite = (HistoryWrite + 1) % MAX_HISTORY_LENGTH;
MaxHistoryPos = (MaxHistoryPos == MAX_HISTORY_LENGTH) ? MAX_HISTORY_LENGTH : (MaxHistoryPos + 1);
HistoryPos = HistoryWrite;
}
input.buf[input.e++ % INPUT_BUF] = c;
input.f = input.e;
consputc(c);
input.w = input.e;
wakeup(&input.r);
}
else
{
input.buf[input.f++ % INPUT_BUF] = c;
if(input.f > input.e)
{
input.e = input.f;
}
consputc(c);
}
}
break;
}
// cprintf("buf %s, read %d, write %d, edit %d\n final %d\n",input.buf,input.r,input.w,input.e, input.f);
}
release(&input.lock);
}
void
consputc(int c)
{
cgaputc (c); //向显存写字符
}
