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77 lines
2.3 KiB
Go
77 lines
2.3 KiB
Go
package liner
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import (
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"unsafe"
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)
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type coord struct {
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x, y int16
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}
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type smallRect struct {
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left, top, right, bottom int16
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}
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type consoleScreenBufferInfo struct {
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dwSize coord
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dwCursorPosition coord
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wAttributes int16
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srWindow smallRect
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dwMaximumWindowSize coord
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}
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func (s *State) cursorPos(x int) {
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var sbi consoleScreenBufferInfo
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procGetConsoleScreenBufferInfo.Call(uintptr(s.hOut), uintptr(unsafe.Pointer(&sbi)))
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procSetConsoleCursorPosition.Call(uintptr(s.hOut),
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uintptr(int(x)&0xFFFF|int(sbi.dwCursorPosition.y)<<16))
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}
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func (s *State) eraseLine() {
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var sbi consoleScreenBufferInfo
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procGetConsoleScreenBufferInfo.Call(uintptr(s.hOut), uintptr(unsafe.Pointer(&sbi)))
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var numWritten uint32
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procFillConsoleOutputCharacter.Call(uintptr(s.hOut), uintptr(' '),
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uintptr(sbi.dwSize.x-sbi.dwCursorPosition.x),
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uintptr(int(sbi.dwCursorPosition.x)&0xFFFF|int(sbi.dwCursorPosition.y)<<16),
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uintptr(unsafe.Pointer(&numWritten)))
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}
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func (s *State) eraseScreen() {
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var sbi consoleScreenBufferInfo
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procGetConsoleScreenBufferInfo.Call(uintptr(s.hOut), uintptr(unsafe.Pointer(&sbi)))
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var numWritten uint32
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procFillConsoleOutputCharacter.Call(uintptr(s.hOut), uintptr(' '),
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uintptr(sbi.dwSize.x)*uintptr(sbi.dwSize.y),
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0,
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uintptr(unsafe.Pointer(&numWritten)))
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procSetConsoleCursorPosition.Call(uintptr(s.hOut), 0)
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}
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func (s *State) moveUp(lines int) {
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var sbi consoleScreenBufferInfo
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procGetConsoleScreenBufferInfo.Call(uintptr(s.hOut), uintptr(unsafe.Pointer(&sbi)))
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procSetConsoleCursorPosition.Call(uintptr(s.hOut),
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uintptr(int(sbi.dwCursorPosition.x)&0xFFFF|(int(sbi.dwCursorPosition.y)-lines)<<16))
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}
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func (s *State) moveDown(lines int) {
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var sbi consoleScreenBufferInfo
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procGetConsoleScreenBufferInfo.Call(uintptr(s.hOut), uintptr(unsafe.Pointer(&sbi)))
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procSetConsoleCursorPosition.Call(uintptr(s.hOut),
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uintptr(int(sbi.dwCursorPosition.x)&0xFFFF|(int(sbi.dwCursorPosition.y)+lines)<<16))
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}
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func (s *State) emitNewLine() {
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// windows doesn't need to omit a new line
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}
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func (s *State) getColumns() {
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var sbi consoleScreenBufferInfo
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procGetConsoleScreenBufferInfo.Call(uintptr(s.hOut), uintptr(unsafe.Pointer(&sbi)))
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s.columns = int(sbi.dwSize.x)
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if s.columns > 1 {
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// Windows 10 needs a spare column for the cursor
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s.columns--
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}
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}
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