diff options
Diffstat (limited to 'vendor/github.com/Azure/go-ansiterm/winterm/cursor_helpers.go')
-rw-r--r-- | vendor/github.com/Azure/go-ansiterm/winterm/cursor_helpers.go | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/vendor/github.com/Azure/go-ansiterm/winterm/cursor_helpers.go b/vendor/github.com/Azure/go-ansiterm/winterm/cursor_helpers.go new file mode 100644 index 000000000..f015723ad --- /dev/null +++ b/vendor/github.com/Azure/go-ansiterm/winterm/cursor_helpers.go @@ -0,0 +1,101 @@ +// +build windows + +package winterm + +const ( + horizontal = iota + vertical +) + +func (h *windowsAnsiEventHandler) getCursorWindow(info *CONSOLE_SCREEN_BUFFER_INFO) SMALL_RECT { + if h.originMode { + sr := h.effectiveSr(info.Window) + return SMALL_RECT{ + Top: sr.top, + Bottom: sr.bottom, + Left: 0, + Right: info.Size.X - 1, + } + } else { + return SMALL_RECT{ + Top: info.Window.Top, + Bottom: info.Window.Bottom, + Left: 0, + Right: info.Size.X - 1, + } + } +} + +// setCursorPosition sets the cursor to the specified position, bounded to the screen size +func (h *windowsAnsiEventHandler) setCursorPosition(position COORD, window SMALL_RECT) error { + position.X = ensureInRange(position.X, window.Left, window.Right) + position.Y = ensureInRange(position.Y, window.Top, window.Bottom) + err := SetConsoleCursorPosition(h.fd, position) + if err != nil { + return err + } + logger.Infof("Cursor position set: (%d, %d)", position.X, position.Y) + return err +} + +func (h *windowsAnsiEventHandler) moveCursorVertical(param int) error { + return h.moveCursor(vertical, param) +} + +func (h *windowsAnsiEventHandler) moveCursorHorizontal(param int) error { + return h.moveCursor(horizontal, param) +} + +func (h *windowsAnsiEventHandler) moveCursor(moveMode int, param int) error { + info, err := GetConsoleScreenBufferInfo(h.fd) + if err != nil { + return err + } + + position := info.CursorPosition + switch moveMode { + case horizontal: + position.X += int16(param) + case vertical: + position.Y += int16(param) + } + + if err = h.setCursorPosition(position, h.getCursorWindow(info)); err != nil { + return err + } + + return nil +} + +func (h *windowsAnsiEventHandler) moveCursorLine(param int) error { + info, err := GetConsoleScreenBufferInfo(h.fd) + if err != nil { + return err + } + + position := info.CursorPosition + position.X = 0 + position.Y += int16(param) + + if err = h.setCursorPosition(position, h.getCursorWindow(info)); err != nil { + return err + } + + return nil +} + +func (h *windowsAnsiEventHandler) moveCursorColumn(param int) error { + info, err := GetConsoleScreenBufferInfo(h.fd) + if err != nil { + return err + } + + position := info.CursorPosition + position.X = int16(param) - 1 + + if err = h.setCursorPosition(position, h.getCursorWindow(info)); err != nil { + return err + } + + return nil +} |