44 lines
1.3 KiB
Go
44 lines
1.3 KiB
Go
//go:build linux
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package enforce
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import (
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"context"
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"fmt"
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"github.com/jezek/xgbutil"
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"github.com/jezek/xgbutil/ewmh"
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"github.com/jezek/xgbutil/icccm"
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)
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// NewGuard returns the real X11 window-minimize guard.
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func NewGuard() Guard { return x11Guard{} }
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type x11Guard struct{}
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// MinimizeActive iconifies the currently-focused window by sending an ICCCM
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// WM_CHANGE_STATE -> IconicState client message to the root window. It opens a
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// short-lived X connection per call: enforcement fires at most once per drift
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// observation (which is debounce-gated upstream), so there is no shared
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// connection or event loop to manage, and nothing to race on shutdown. Any X
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// failure is returned for the caller to log; the caller never blocks on it.
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func (x11Guard) MinimizeActive(_ context.Context) error {
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X, err := xgbutil.NewConn()
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if err != nil {
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return fmt.Errorf("enforce: cannot connect to X server: %w", err)
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}
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defer X.Conn().Close()
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active, err := ewmh.ActiveWindowGet(X)
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if err != nil {
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return fmt.Errorf("enforce: no active window: %w", err)
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}
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if active == 0 {
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return nil // nothing focused; nothing to minimize
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}
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if err := ewmh.ClientEvent(X, active, "WM_CHANGE_STATE", icccm.StateIconic); err != nil {
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return fmt.Errorf("enforce: minimize request failed: %w", err)
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}
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return nil
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}
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