1 files changed, 94 insertions, 0 deletions
diff --git a/Source/Kernel/VTManager/ScrollableVT.class.cpp b/Source/Kernel/VTManager/ScrollableVT.class.cpp
new file mode 100644
index 0000000..ca0075a
--- /dev/null
+++ b/Source/Kernel/VTManager/ScrollableVT.class.cpp
@@ -0,0 +1,94 @@
+#include "ScrollableVT.class.h"
+#include <VTManager/VT.ns.h>
+#include <DeviceManager/Disp.ns.h>
+
+#define BUFCHR(l, c) m_buff[((l) * m_cols) + (c)]
+
+ScrollableVT::ScrollableVT(u32int rows, u32int cols, u32int keepRows, u8int fgcolor, u8int bgcolor) :
+		SimpleVT(rows, cols, fgcolor, bgcolor) {
+	m_keeprows = keepRows;
+	m_linesup = 0;
+	m_lines = new vtchr* [keepRows];
+	for (u32int i = 0; i < keepRows; i++) {
+		m_lines[i] = new vtchr [cols];
+		for (u32int j = 0; j < cols; j++) {
+			m_lines[i][j].color = m_color;
+			m_lines[i][j].c = " ";
+		}
+	}
+}
+
+ScrollableVT::~ScrollableVT() {
+	for (u32int i = 0; i < m_keeprows; i++) {
+		delete m_lines[i];
+	}
+	delete m_lines;
+}
+
+void ScrollableVT::putChar(u32int row, u32int col, WChar c) {
+	if (row >= m_rows or col >= m_cols) return;
+	vtchr* ch = &BUFCHR(row, col);
+	ch->c = c;
+	ch->color = m_color;
+	if (m_mapped) {
+		if (row + m_linesup < m_rows)
+			Disp::putChar(row + m_maprow + m_linesup, col + m_mapcol, BUFCHR(row, col).c, m_color);
+	}
+}
+
+void ScrollableVT::updateCursor() {
+	if (m_csrlin + m_linesup < m_rows)
+		Disp::moveCursor(m_csrlin + m_maprow + m_linesup, m_csrcol + m_mapcol);
+}
+
+void ScrollableVT::redraw() {
+	if (!m_mapped) return;
+	for (u32int r = 0; r < m_rows; r++) {
+		if (r >= m_linesup) {
+			for (u32int c = 0; c < m_cols; c++) {
+				Disp::putChar(r + m_maprow, c + m_mapcol, BUFCHR(r - m_linesup, c).c, BUFCHR(r - m_linesup, c).color);
+			}
+		} else {
+			for (u32int c = 0; c < m_cols; c++) {
+				register u32int l = m_keeprows - m_linesup + r;
+				Disp::putChar(r + m_maprow, c + m_mapcol, m_lines[l][c].c, m_lines[l][c].color);
+			}
+		}
+	}
+}
+
+void ScrollableVT::scroll() {
+	for (u32int c = 0; c < m_cols; c++) {
+		m_lines[0][c] = BUFCHR(0, c);
+	}
+	vtchr* x = m_lines[0];
+	for (u32int l = 1; l < m_keeprows; l++) {
+		m_lines[l - 1] = m_lines[l];
+	}
+	m_lines[m_keeprows - 1] = x;
+	SimpleVT::scroll();
+}
+
+void ScrollableVT::keyPress(Kbd::keypress_t kp) {
+	if (kp.hascmd && kp.modifiers == STATUS_SHIFT) {
+		s32int nlup = m_linesup;
+		if (kp.command == KBDC_PGUP) {
+			nlup = m_linesup + (m_rows - 2);
+		} else if (kp.command == KBDC_PGDOWN) {
+			nlup = m_linesup - (m_rows - 2);
+		} else if (kp.command == KBDC_UP) {
+			nlup = m_linesup + 1;
+		} else if (kp.command == KBDC_DOWN) {
+			nlup = m_linesup - 1;
+		} else {
+			VirtualTerminal::keyPress(kp);
+		}
+		if (nlup < 0) nlup = 0;
+		m_linesup = nlup;
+		if (m_linesup > m_keeprows) m_linesup = m_keeprows;
+		redraw();
+		updateCursor();
+	} else {
+		VirtualTerminal::keyPress(kp);
+	}
+}