io/semantic: [API] replace DisabledOp with EnabledOp

The double-negative DisabledOp is harder to understand than a
straightforward EnabledOp. Note that the absence of an EnabledOp
implies still means that the widget is enabled.

Signed-off-by: Elias Naur <mail@eliasnaur.com>

internal/ops/ops.go

@@ -84,7 +84,7 @@ const (
 	TypeSemanticDesc
 	TypeSemanticClass
 	TypeSemanticSelected
-	TypeSemanticDisabled
+	TypeSemanticEnabled
 	TypeSnippet
 	TypeSelection
 	TypeActionInput
@@ -170,7 +170,7 @@ const (
 	TypeSemanticDescLen     = 1
 	TypeSemanticClassLen    = 2
 	TypeSemanticSelectedLen = 2
-	TypeSemanticDisabledLen = 2
+	TypeSemanticEnabledLen  = 2
 	TypeSnippetLen          = 1 + 4 + 4
 	TypeSelectionLen        = 1 + 2*4 + 2*4 + 4 + 4
 	TypeActionInputLen      = 1 + 1
@@ -454,7 +454,7 @@ var opProps = [0x100]opProp{
 	TypeSemanticDesc:     {Size: TypeSemanticDescLen, NumRefs: 1},
 	TypeSemanticClass:    {Size: TypeSemanticClassLen, NumRefs: 0},
 	TypeSemanticSelected: {Size: TypeSemanticSelectedLen, NumRefs: 0},
-	TypeSemanticDisabled: {Size: TypeSemanticDisabledLen, NumRefs: 0},
+	TypeSemanticEnabled:  {Size: TypeSemanticEnabledLen, NumRefs: 0},
 	TypeSnippet:          {Size: TypeSnippetLen, NumRefs: 2},
 	TypeSelection:        {Size: TypeSelectionLen, NumRefs: 1},
 	TypeActionInput:      {Size: TypeActionInputLen, NumRefs: 0},

io/router/pointer.go

@@ -309,11 +309,11 @@ func (c *pointerCollector) semanticSelected(selected bool) {
 	area.semantic.content.selected = selected
 }
 
-func (c *pointerCollector) semanticDisabled(disabled bool) {
+func (c *pointerCollector) semanticEnabled(enabled bool) {
 	areaID := c.currentArea()
 	area := &c.q.areas[areaID]
 	area.semantic.valid = true
-	area.semantic.content.disabled = disabled
+	area.semantic.content.disabled = !enabled
 }
 
 func (c *pointerCollector) cursor(cursor pointer.Cursor) {

io/router/router.go

@@ -546,11 +546,11 @@ func (q *Router) collect() {
 			} else {
 				pc.semanticSelected(false)
 			}
-		case ops.TypeSemanticDisabled:
+		case ops.TypeSemanticEnabled:
 			if encOp.Data[1] != 0 {
-				pc.semanticDisabled(true)
+				pc.semanticEnabled(true)
 			} else {
-				pc.semanticDisabled(false)
+				pc.semanticEnabled(false)
 			}
 		}
 	}

io/router/semantic_test.go

@@ -78,7 +78,7 @@ func TestSemanticDescription(t *testing.T) {
 	semantic.DescriptionOp("description").Add(&ops)
 	semantic.LabelOp("label").Add(&ops)
 	semantic.Button.Add(&ops)
-	semantic.DisabledOp(true).Add(&ops)
+	semantic.EnabledOp(false).Add(&ops)
 	semantic.SelectedOp(true).Add(&ops)
 	var r Router
 	r.Frame(&ops)

io/semantic/semantic.go

@@ -36,8 +36,8 @@ const (
 // boolean state.
 type SelectedOp bool
 
-// DisabledOp describes the disabled state.
-type DisabledOp bool
+// EnabledOp describes the enabled state.
+type EnabledOp bool
 
 func (l LabelOp) Add(o *op.Ops) {
 	data := ops.Write1String(&o.Internal, ops.TypeSemanticLabelLen, string(l))
@@ -63,10 +63,10 @@ func (s SelectedOp) Add(o *op.Ops) {
 	}
 }
 
-func (d DisabledOp) Add(o *op.Ops) {
-	data := ops.Write(&o.Internal, ops.TypeSemanticDisabledLen)
-	data[0] = byte(ops.TypeSemanticDisabled)
-	if d {
+func (e EnabledOp) Add(o *op.Ops) {
+	data := ops.Write(&o.Internal, ops.TypeSemanticEnabledLen)
+	data[0] = byte(ops.TypeSemanticEnabled)
+	if e {
 		data[1] = 1
 	}
 }

widget/bool.go

@@ -49,7 +49,7 @@ func (b *Bool) Layout(gtx layout.Context, w layout.Widget) layout.Dimensions {
 			b.changed = true
 		}
 		semantic.SelectedOp(b.Value).Add(gtx.Ops)
-		semantic.DisabledOp(gtx.Queue == nil).Add(gtx.Ops)
+		semantic.EnabledOp(gtx.Queue != nil).Add(gtx.Ops)
 		return w(gtx)
 	})
 	return dims

widget/button.go

@@ -113,10 +113,10 @@ func (b *Clickable) Layout(gtx layout.Context, w layout.Widget) layout.Dimension
 	dims := w(gtx)
 	c := m.Stop()
 	defer clip.Rect(image.Rectangle{Max: dims.Size}).Push(gtx.Ops).Pop()
-	disabled := gtx.Queue == nil
-	semantic.DisabledOp(disabled).Add(gtx.Ops)
+	enabled := gtx.Queue != nil
+	semantic.EnabledOp(enabled).Add(gtx.Ops)
 	b.click.Add(gtx.Ops)
-	if !disabled {
+	if enabled {
 		keys := key.Set("⏎|Space")
 		if !b.focused {
 			keys = ""

widget/enum.go

@@ -116,14 +116,14 @@ func (e *Enum) Layout(gtx layout.Context, k string, content layout.Widget) layou
 	}
 
 	clk.Add(gtx.Ops)
-	disabled := gtx.Queue == nil
-	if !disabled {
+	enabled := gtx.Queue != nil
+	if enabled {
 		key.InputOp{Tag: &state.tag, Keys: "⏎|Space"}.Add(gtx.Ops)
 	} else if e.focus == k {
 		e.focused = false
 	}
 	semantic.SelectedOp(k == e.Value).Add(gtx.Ops)
-	semantic.DisabledOp(disabled).Add(gtx.Ops)
+	semantic.EnabledOp(enabled).Add(gtx.Ops)
 	c.Add(gtx.Ops)
 
 	return dims