1 files changed, 93 insertions, 0 deletions
diff --git a/vendor/gioui.org/io/semantic/semantic.go b/vendor/gioui.org/io/semantic/semantic.go
new file mode 100644
index 0000000..7499fc8
--- /dev/null
+++ b/vendor/gioui.org/io/semantic/semantic.go
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: Unlicense OR MIT
+
+// Package semantic provides operations for semantic descriptions of a user
+// interface, to facilitate presentation and interaction in external software
+// such as screen readers.
+//
+// Semantic descriptions are organized in a tree, with clip operations as
+// nodes. Operations in this package are associated with the current semantic
+// node, that is the most recent pushed clip operation.
+package semantic
+
+import (
+	"gioui.org/internal/ops"
+	"gioui.org/op"
+)
+
+// LabelOp provides the content of a textual component.
+type LabelOp string
+
+// DescriptionOp describes a component.
+type DescriptionOp string
+
+// ClassOp provides the component class.
+type ClassOp int
+
+const (
+	Unknown ClassOp = iota
+	Button
+	CheckBox
+	Editor
+	RadioButton
+	Switch
+)
+
+// SelectedOp describes the selected state for components that have
+// boolean state.
+type SelectedOp bool
+
+// DisabledOp describes the disabled state.
+type DisabledOp bool
+
+func (l LabelOp) Add(o *op.Ops) {
+	s := string(l)
+	data := ops.Write1(&o.Internal, ops.TypeSemanticLabelLen, &s)
+	data[0] = byte(ops.TypeSemanticLabel)
+}
+
+func (d DescriptionOp) Add(o *op.Ops) {
+	s := string(d)
+	data := ops.Write1(&o.Internal, ops.TypeSemanticDescLen, &s)
+	data[0] = byte(ops.TypeSemanticDesc)
+}
+
+func (c ClassOp) Add(o *op.Ops) {
+	data := ops.Write(&o.Internal, ops.TypeSemanticClassLen)
+	data[0] = byte(ops.TypeSemanticClass)
+	data[1] = byte(c)
+}
+
+func (s SelectedOp) Add(o *op.Ops) {
+	data := ops.Write(&o.Internal, ops.TypeSemanticSelectedLen)
+	data[0] = byte(ops.TypeSemanticSelected)
+	if s {
+		data[1] = 1
+	}
+}
+
+func (d DisabledOp) Add(o *op.Ops) {
+	data := ops.Write(&o.Internal, ops.TypeSemanticDisabledLen)
+	data[0] = byte(ops.TypeSemanticDisabled)
+	if d {
+		data[1] = 1
+	}
+}
+
+func (c ClassOp) String() string {
+	switch c {
+	case Unknown:
+		return "Unknown"
+	case Button:
+		return "Button"
+	case CheckBox:
+		return "CheckBox"
+	case Editor:
+		return "Editor"
+	case RadioButton:
+		return "RadioButton"
+	case Switch:
+		return "Switch"
+	default:
+		panic("invalid ClassOp")
+	}
+}