对窗口滚动的支持

18_day/bootpack.c

@@ -393,9 +393,9 @@ void console_task(struct SHEET *sheet)
 {
 	struct TIMER *timer;
 	struct TASK *task = task_now();
-
 	int i, fifobuf[128], cursor_x = 16, cursor_y = 28, cursor_c = -1;
 	char s[2];
+	int x, y;
 
 	fifo32_init(&task->fifo, 128, fifobuf, task);
 	timer = timer_alloc();
@@ -444,6 +444,27 @@ void console_task(struct SHEET *sheet)
 					}
 				} else if (i == 10 + 256) {
 					/*回车键*/
+					/*用空格将光标擦除*/
+					putfonts8_asc_sht(sheet, cursor_x, cursor_y, COL8_FFFFFF, COL8_000000, " ", 1);
+					if (cursor_y < 28 + 112) {
+						cursor_y += 16; /*换行*/
+					} else {
+						/*滚动*/
+						for (y = 28; y < 28 + 112; y++) {
+							for (x = 8; x < 8 + 240; x++) {
+								sheet->buf[x + y * sheet->bxsize] = sheet->buf[x + (y + 16) * sheet->bxsize];
+							}
+						}
+						for (y = 28 + 112; y < 28 + 128; y++) {
+							for (x = 8; x < 8 + 240; x++) {
+								sheet->buf[x + y * sheet->bxsize] = COL8_000000;
+							}
+						}
+						sheet_refresh(sheet, 8, 28, 8 + 240, 28 + 128);
+					}
+					/*显示提示符*/
+					putfonts8_asc_sht(sheet, 8, cursor_y, COL8_FFFFFF, COL8_000000, ">", 1);
+					cursor_x = 16;
 					if (cursor_y < 28 + 112) {
 						/*用空格将光标擦除*/
 						putfonts8_asc_sht(sheet, cursor_x, cursor_y, COL8_FFFFFF, COL8_000000, " ", 1);