2be9cf1fab
Instead of using a fixed 100x30 window size query the operating system for the exact size, also fixes a bug where the last line before calling the pager is repeated twice.
45 lines
1.1 KiB
Go
45 lines
1.1 KiB
Go
package terminal
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import (
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"syscall"
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"unsafe"
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)
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var (
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kernel32 = syscall.NewLazyDLL("kernel32.dll")
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procGetStdHandle = kernel32.NewProc("GetStdHandle")
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procGetConsoleScreenBufferInfo = kernel32.NewProc("GetConsoleScreenBufferInfo")
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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 (w *pagingWriter) getWindowSize() {
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hout, _, err := procGetStdHandle.Call(uintptr(uint32(-12 & 0xFFFFFFFF))) // stdout handle
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if err != syscall.Errno(0) {
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w.mode = pagingWriterNormal
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return
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}
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var sbi consoleScreenBufferInfo
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_, _, err = procGetConsoleScreenBufferInfo.Call(uintptr(hout), uintptr(unsafe.Pointer(&sbi)))
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if err != syscall.Errno(0) {
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w.mode = pagingWriterNormal
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return
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}
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w.columns = int(sbi.srWindow.right - sbi.srWindow.left + 1)
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w.lines = int(sbi.srWindow.bottom - sbi.srWindow.top + 1)
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}
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