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// +build windows
// Copyright 2014 Oleku Konko All rights reserved.
// Use of this source code is governed by a MIT
// license that can be found in the LICENSE file.
// This module is a Terminal API for the Go Programming Language.
// The protocols were written in pure Go and works on windows and unix systems
package ts
import (
"syscall"
"unsafe"
)
var (
kernel32 = syscall.NewLazyDLL("kernel32.dll")
// Retrieves information about the specified console screen buffer.
// See http://msdn.microsoft.com/en-us/library/windows/desktop/ms683171(v=vs.85).aspx
screenBufferInfo = kernel32.NewProc("GetConsoleScreenBufferInfo")
)
// Contains information about a console screen buffer.
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms682093(v=vs.85).aspx
type CONSOLE_SCREEN_BUFFER_INFO struct {
DwSize COORD
DwCursorPosition COORD
WAttributes uint16
SrWindow SMALL_RECT
DwMaximumWindowSize COORD
}
// Defines the coordinates of a character cell in a console screen buffer.
// The origin of the coordinate system (0,0) is at the top, left cell of the buffer.
// See http://msdn.microsoft.com/en-us/library/windows/desktop/ms682119(v=vs.85).aspx
type COORD struct {
X, Y uint16
}
// Defines the coordinates of the upper left and lower right corners of a rectangle.
// See http://msdn.microsoft.com/en-us/library/windows/desktop/ms686311(v=vs.85).aspx
type SMALL_RECT struct {
Left, Top, Right, Bottom uint16
}
func GetSize() (ws Size, err error) {
var info CONSOLE_SCREEN_BUFFER_INFO
rc, _, err := screenBufferInfo.Call(
uintptr(syscall.Stdout),
uintptr(unsafe.Pointer(&info)))
if rc == 0 {
return ws, err
}
ws = Size{info.SrWindow.Bottom,
info.SrWindow.Right,
info.DwCursorPosition.X,
info.DwCursorPosition.Y}
return ws, nil
}
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