started work on new buffer

buffer/buffer.go

@@ -6,48 +6,49 @@ import (
 
 type Buffer struct {
 	lines       []line
-	x           int
-	y           int
-	columnCount int
-	lineCount   int
+	x           uint16
+	y           uint16
+	columnCount uint16
+	viewHeight  uint16
 }
 
 // NewBuffer creates a new terminal buffer
-func NewBuffer(columns int) *Buffer {
+func NewBuffer() *Buffer {
 	return &Buffer{
 		x:           0,
 		y:           0,
 		lines:       []line{},
-		columnCount: columns,
+		columnCount: 0,
 	}
 }
 
 // Column returns cursor column
-func (buffer *Buffer) Column() int {
+func (buffer *Buffer) Column() uint16 {
 	return buffer.x
 }
 
 // Line returns cursor line
-func (buffer *Buffer) Line() int {
+func (buffer *Buffer) Line() uint16 {
 	return buffer.y
 }
 
 // Width returns the width of the buffer in columns
-func (buffer *Buffer) Width() int {
+func (buffer *Buffer) Width() uint16 {
 	return buffer.columnCount
 }
 
 // Write will write a rune to the terminal at the position of the cursor, and increment the cursor position
 func (buffer *Buffer) Write(r rune) {
-	for buffer.Line() >= len(buffer.lines) {
+	for int(buffer.Line()) >= len(buffer.lines) {
 		buffer.lines = append(buffer.lines, newLine())
 	}
 	line := &buffer.lines[buffer.Line()]
-	for buffer.Column() >= len(line.cells) {
+	for int(buffer.Column()) >= len(line.cells) {
 		line.cells = append(line.cells, newCell())
 	}
 	cell := line.cells[buffer.Column()]
 	cell.setRune(r)
+	buffer.incrementCursorPosition()
 }
 
 func (buffer *Buffer) incrementCursorPosition() {
@@ -60,7 +61,7 @@ func (buffer *Buffer) incrementCursorPosition() {
 	}
 }
 
-func (buffer *Buffer) SetPosition(col int, line int) error {
+func (buffer *Buffer) SetPosition(col uint16, line uint16) error {
 	if buffer.x >= buffer.Width() {
 		return fmt.Errorf("Cannot set cursor position: column %d is outside of the current buffer width (%d columns)", col, buffer.Width())
 	}
@@ -69,6 +70,6 @@ func (buffer *Buffer) SetPosition(col int, line int) error {
 	return nil
 }
 
-func (buffer *Buffer) SetSize(cols int, lines int) {
+func (buffer *Buffer) Resize(cols int, lines int) {
 
 }