forked from toolshed/abra
102 lines
2.2 KiB
Go
102 lines
2.2 KiB
Go
// +build windows
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package winterm
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const (
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horizontal = iota
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vertical
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)
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func (h *windowsAnsiEventHandler) getCursorWindow(info *CONSOLE_SCREEN_BUFFER_INFO) SMALL_RECT {
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if h.originMode {
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sr := h.effectiveSr(info.Window)
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return SMALL_RECT{
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Top: sr.top,
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Bottom: sr.bottom,
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Left: 0,
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Right: info.Size.X - 1,
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}
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} else {
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return SMALL_RECT{
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Top: info.Window.Top,
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Bottom: info.Window.Bottom,
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Left: 0,
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Right: info.Size.X - 1,
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}
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}
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}
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// setCursorPosition sets the cursor to the specified position, bounded to the screen size
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func (h *windowsAnsiEventHandler) setCursorPosition(position COORD, window SMALL_RECT) error {
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position.X = ensureInRange(position.X, window.Left, window.Right)
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position.Y = ensureInRange(position.Y, window.Top, window.Bottom)
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err := SetConsoleCursorPosition(h.fd, position)
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if err != nil {
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return err
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}
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h.logf("Cursor position set: (%d, %d)", position.X, position.Y)
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return err
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}
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func (h *windowsAnsiEventHandler) moveCursorVertical(param int) error {
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return h.moveCursor(vertical, param)
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}
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func (h *windowsAnsiEventHandler) moveCursorHorizontal(param int) error {
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return h.moveCursor(horizontal, param)
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}
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func (h *windowsAnsiEventHandler) moveCursor(moveMode int, param int) error {
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info, err := GetConsoleScreenBufferInfo(h.fd)
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if err != nil {
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return err
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}
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position := info.CursorPosition
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switch moveMode {
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case horizontal:
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position.X += int16(param)
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case vertical:
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position.Y += int16(param)
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}
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if err = h.setCursorPosition(position, h.getCursorWindow(info)); err != nil {
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return err
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}
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return nil
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}
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func (h *windowsAnsiEventHandler) moveCursorLine(param int) error {
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info, err := GetConsoleScreenBufferInfo(h.fd)
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if err != nil {
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return err
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}
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position := info.CursorPosition
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position.X = 0
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position.Y += int16(param)
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if err = h.setCursorPosition(position, h.getCursorWindow(info)); err != nil {
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return err
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}
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return nil
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}
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func (h *windowsAnsiEventHandler) moveCursorColumn(param int) error {
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info, err := GetConsoleScreenBufferInfo(h.fd)
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if err != nil {
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return err
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}
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position := info.CursorPosition
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position.X = int16(param) - 1
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if err = h.setCursorPosition(position, h.getCursorWindow(info)); err != nil {
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return err
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}
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return nil
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}
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