88 lines
2.5 KiB
C++
Executable File
88 lines
2.5 KiB
C++
Executable File
#include "BufferedCGA.h"
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// Can't initialize in constructor as memory management already needs working CGA for output
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// NOTE: This has to be called when memorymanagement is active
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void BufferedCGA::init(unsigned int pages) {
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this->scrollback_buffer = new ScrollbackBuffer(COLUMNS, ROWS, pages);
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this->initialized = true;
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this->print("\nInitialized scrollback buffer\n\n", 32);
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}
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void BufferedCGA::displaypage() {
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if (this->initialized) {
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if (this->current_page == 0) {
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// Use pagebuffer
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this->scrollback_buffer->copy_page_from_pagebuffer((cga_page_t*)CGA_START);
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} else {
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// Use scrollback
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this->scrollback_buffer->copy_page_from_buffer((cga_line_t*)CGA_START, this->current_page - 1);
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}
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} else {
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this->print("ScrollbackBuffer not initialized\n\n", 34);
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}
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}
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void BufferedCGA::print(char* string, int n, unsigned char attrib) {
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if (this->current_page != 0) {
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// Display newest content from buffer when new prints happen
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this->current_page = 0;
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this->displaypage();
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}
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CGA::print(string, n, attrib);
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}
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void BufferedCGA::scrollup() {
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if (this->initialized) {
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this->scrollback_buffer->line_to_buffer((cga_line_t*)CGA_START);
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} else {
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this->print("ScrollbackBuffer not initialized\n\n", 34);
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}
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CGA::scrollup();
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}
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void BufferedCGA::clear() {
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CGA::clear();
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this->current_page = 0;
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if (this->initialized) {
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this->scrollback_buffer->clear();
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} else {
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this->print("ScrollbackBuffer not initialized\n\n", 34);
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}
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}
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void BufferedCGA::scroll_page_backward() {
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if (this->initialized) {
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// If this is the first scrollback we have to save the current screen content
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if (this->current_page == 0) {
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this->scrollback_buffer->copy_page_to_pagebuffer((cga_page_t*)CGA_START);
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}
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// current_page can be equal to scrollback_buffer->pages
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// as we have a separate pagebuffer for the current screen content
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if (this->current_page < this->scrollback_buffer->pages) {
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this->current_page = this->current_page + 1;
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}
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this->displaypage();
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} else {
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this->print("ScrollbackBuffer not initialized\n\n", 34);
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}
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}
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void BufferedCGA::scroll_page_forward() {
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if (this->initialized) {
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if (this->current_page > 0) {
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this->current_page = this->current_page - 1;
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}
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this->displaypage();
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} else {
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this->print("ScrollbackBuffer not initialized\n\n", 34);
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}
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}
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