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implement scrollup

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This commit is contained in:
Eggert Jung
2025-04-27 21:09:43 +02:00
parent 0666fc30c7
commit 0b8c00ab19
2 changed files with 10 additions and 1 deletions
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9
arch/textwindow.cc
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@@ -1,5 +1,6 @@
#include "textwindow.h"
#include "cga.h"
#include "../utils/string.h"
TextWindow::TextWindow(unsigned from_col, unsigned to_col, unsigned from_row,
unsigned to_row, bool use_cursor) {
@@ -49,6 +50,12 @@ void TextWindow::getPos(int& rel_x, int& rel_y) const {
rel_y = y;
}
void TextWindow::scrollUp(){
for(uint8_t row = from_row; row < to_row; row++){
memmove(&CGA::TEXT_BUFFER_BASE[row*CGA::COLUMNS + from_col], &CGA::TEXT_BUFFER_BASE[(row+1)*CGA::COLUMNS + from_col], 2*(to_col-from_col));
}
}
void TextWindow::print(const char* str, size_t length, CGA::Attribute attrib) {
for(unsigned i=0; i<length; i++){
unsigned x_now, y_now;
@@ -56,7 +63,7 @@ void TextWindow::print(const char* str, size_t length, CGA::Attribute attrib) {
if(str[i] == '\n'){
x_now = 0;
if(from_row + y_now >= to_row-1){
//TODO scrollUp()
scrollUp();
}
else{
y_now++;