github.com/axw/llgo@v0.0.0-20160805011314-95b5fe4dca20/third_party/liner/output_windows.go (about)

     1  package liner
     2  
     3  import (
     4  	"unsafe"
     5  )
     6  
     7  type coord struct {
     8  	x, y int16
     9  }
    10  type smallRect struct {
    11  	left, top, right, bottom int16
    12  }
    13  
    14  type consoleScreenBufferInfo struct {
    15  	dwSize              coord
    16  	dwCursorPosition    coord
    17  	wAttributes         int16
    18  	srWindow            smallRect
    19  	dwMaximumWindowSize coord
    20  }
    21  
    22  func (s *State) cursorPos(x int) {
    23  	var sbi consoleScreenBufferInfo
    24  	procGetConsoleScreenBufferInfo.Call(uintptr(s.hOut), uintptr(unsafe.Pointer(&sbi)))
    25  	procSetConsoleCursorPosition.Call(uintptr(s.hOut),
    26  		uintptr(int(x)&0xFFFF|int(sbi.dwCursorPosition.y)<<16))
    27  }
    28  
    29  func (s *State) eraseLine() {
    30  	var sbi consoleScreenBufferInfo
    31  	procGetConsoleScreenBufferInfo.Call(uintptr(s.hOut), uintptr(unsafe.Pointer(&sbi)))
    32  	var numWritten uint32
    33  	procFillConsoleOutputCharacter.Call(uintptr(s.hOut), uintptr(' '),
    34  		uintptr(sbi.dwSize.x-sbi.dwCursorPosition.x),
    35  		uintptr(int(sbi.dwCursorPosition.x)&0xFFFF|int(sbi.dwCursorPosition.y)<<16),
    36  		uintptr(unsafe.Pointer(&numWritten)))
    37  }
    38  
    39  func (s *State) eraseScreen() {
    40  	var sbi consoleScreenBufferInfo
    41  	procGetConsoleScreenBufferInfo.Call(uintptr(s.hOut), uintptr(unsafe.Pointer(&sbi)))
    42  	var numWritten uint32
    43  	procFillConsoleOutputCharacter.Call(uintptr(s.hOut), uintptr(' '),
    44  		uintptr(sbi.dwSize.x)*uintptr(sbi.dwSize.y),
    45  		0,
    46  		uintptr(unsafe.Pointer(&numWritten)))
    47  	procSetConsoleCursorPosition.Call(uintptr(s.hOut), 0)
    48  }
    49  
    50  func (s *State) moveUp(lines int) {
    51  	var sbi consoleScreenBufferInfo
    52  	procGetConsoleScreenBufferInfo.Call(uintptr(s.hOut), uintptr(unsafe.Pointer(&sbi)))
    53  	procSetConsoleCursorPosition.Call(uintptr(s.hOut),
    54  		uintptr(int(sbi.dwCursorPosition.x)&0xFFFF|(int(sbi.dwCursorPosition.y)-lines)<<16))
    55  }
    56  
    57  func (s *State) moveDown(lines int) {
    58  	var sbi consoleScreenBufferInfo
    59  	procGetConsoleScreenBufferInfo.Call(uintptr(s.hOut), uintptr(unsafe.Pointer(&sbi)))
    60  	procSetConsoleCursorPosition.Call(uintptr(s.hOut),
    61  		uintptr(int(sbi.dwCursorPosition.x)&0xFFFF|(int(sbi.dwCursorPosition.y)+lines)<<16))
    62  }
    63  
    64  func (s *State) emitNewLine() {
    65  	// windows doesn't need to omit a new line
    66  }
    67  
    68  func (s *State) getColumns() {
    69  	var sbi consoleScreenBufferInfo
    70  	procGetConsoleScreenBufferInfo.Call(uintptr(s.hOut), uintptr(unsafe.Pointer(&sbi)))
    71  	s.columns = int(sbi.dwSize.x)
    72  }