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console_win: Try VIRTUAL_TERMINAL_PROCESSING aka modeVtOutput first and switch to alternate screen processing #26

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console_win: Try VIRTUAL_TERMINAL_PROCESSING aka modeVtOutput first and switch to alternate screen processing #26

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2401bc9
console_win: Try to activate modeVtOutput by default
JoeKar Dec 17, 2023
09e15ee
console_win: Switch to alternate screen mode in case of modeVtOutput
JoeKar Dec 17, 2023
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28 changes: 16 additions & 12 deletions console_win.go
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Original file line number Diff line number Diff line change
Expand Up @@ -146,6 +146,8 @@ const (
vtSetBg = "\x1b[48;5;%dm"
vtSetFgRGB = "\x1b[38;2;%d;%d;%dm" // RGB
vtSetBgRGB = "\x1b[48;2;%d;%d;%dm" // RGB
vtEnterCA = "\x1b[?1049h\x1b[22;0;0t" // activate alternate screen + store title
vtExitCA = "\x1b[?1049l\x1b[23;0;0t" // deactivate alternate screen + restore title
)

// NewConsoleScreen returns a Screen for the Windows console associated
Expand Down Expand Up @@ -215,22 +217,20 @@ func (s *cScreen) Init() error {

s.fini = false
s.setInMode(modeResizeEn | modeExtndFlg)

// 24-bit color is opt-in for now, because we can't figure out
// to make it work consistently.
if s.truecolor {
s.setOutMode(modeVtOutput | modeNoAutoNL | modeCookedOut)
var omode uint32
s.getOutMode(&omode)
if omode&modeVtOutput == modeVtOutput {
s.vten = true
} else {
s.truecolor = false
}
s.setOutMode(modeVtOutput | modeNoAutoNL | modeCookedOut)
var omode uint32
s.getOutMode(&omode)
if omode&modeVtOutput == modeVtOutput {
s.vten = true
} else {
s.truecolor = false
s.setOutMode(0)
}

if s.vten {
s.emitVtString(vtEnterCA)
}

s.clearScreen(s.style)
s.hideCursor()
s.Unlock()
Expand All @@ -257,6 +257,10 @@ func (s *cScreen) Fini() {
}

func (s *cScreen) finish() {
if s.vten {
s.emitVtString(vtExitCA)
}

s.Lock()
s.style = StyleDefault
s.curx = -1
Expand Down