Drop ncurses dependency

Close #818

src/tui/dummy.go

@@ -0,0 +1,45 @@
+// +build !ncurses
+// +build !tcell
+// +build !windows
+
+package tui
+
+type Attr int
+
+func HasFullscreenRenderer() bool {
+	return false
+}
+
+func (a Attr) Merge(b Attr) Attr {
+	return a | b
+}
+
+const (
+	AttrRegular Attr = Attr(0)
+	Bold             = Attr(1)
+	Dim              = Attr(1 << 1)
+	Italic           = Attr(1 << 2)
+	Underline        = Attr(1 << 3)
+	Blink            = Attr(1 << 4)
+	Blink2           = Attr(1 << 5)
+	Reverse          = Attr(1 << 6)
+)
+
+func (r *FullscreenRenderer) Init()    {}
+func (r *FullscreenRenderer) Pause()   {}
+func (r *FullscreenRenderer) Clear()   {}
+func (r *FullscreenRenderer) Refresh() {}
+func (r *FullscreenRenderer) Close()   {}
+
+func (r *FullscreenRenderer) Resume() bool       { return false }
+func (r *FullscreenRenderer) DoesAutoWrap() bool { return false }
+func (r *FullscreenRenderer) IsOptimized() bool  { return false }
+func (r *FullscreenRenderer) GetChar() Event     { return Event{} }
+func (r *FullscreenRenderer) MaxX() int          { return 0 }
+func (r *FullscreenRenderer) MaxY() int          { return 0 }
+
+func (r *FullscreenRenderer) RefreshWindows(windows []Window) {}
+
+func (r *FullscreenRenderer) NewWindow(top int, left int, width int, height int, border bool) Window {
+	return nil
+}