refactor(tracker/gioui): wrap Editor to include common key.Filters

tracker/gioui/editor.go

@@ -0,0 +1,71 @@
+package gioui
+
+import (
+	"gioui.org/io/event"
+	"gioui.org/io/key"
+	"gioui.org/widget"
+	"gioui.org/widget/material"
+)
+
+type (
+	// Editor wraps a widget.Editor and adds some additional key event filters,
+	// to prevent key presses from flowing through to the rest of the
+	// application while editing (particularly: to prevent triggering notes
+	// while editing).
+	Editor struct {
+		Editor  widget.Editor
+		filters []event.Filter
+	}
+
+	EditorStyle material.EditorStyle
+)
+
+func NewEditor(e widget.Editor) *Editor {
+	ret := &Editor{
+		Editor: e,
+	}
+	for c := 'A'; c <= 'Z'; c++ {
+		ret.filters = append(ret.filters, key.Filter{Name: key.Name(c), Focus: &ret.Editor})
+	}
+	for c := '0'; c <= '9'; c++ {
+		ret.filters = append(ret.filters, key.Filter{Name: key.Name(c), Focus: &ret.Editor})
+	}
+	ret.filters = append(ret.filters, key.Filter{Name: key.NameSpace, Focus: &ret.Editor})
+	ret.filters = append(ret.filters, key.Filter{Name: key.NameEscape, Focus: &ret.Editor})
+	return ret
+}
+
+func MaterialEditor(th *material.Theme, e *Editor, hint string) EditorStyle {
+	return EditorStyle(material.Editor(th, &e.Editor, hint))
+}
+
+func (e *Editor) Submitted(gtx C) bool {
+	for {
+		ev, ok := e.Editor.Update(gtx)
+		if !ok {
+			break
+		}
+		_, ok = ev.(widget.SubmitEvent)
+		if ok {
+			return true
+		}
+	}
+	return false
+}
+
+func (e *Editor) Cancelled(gtx C) bool {
+	for {
+		event, ok := gtx.Event(e.filters...)
+		if !ok {
+			break
+		}
+		if e, ok := event.(key.Event); ok && e.State == key.Press && e.Name == key.NameEscape {
+			return true
+		}
+	}
+	return false
+}
+
+func (e *EditorStyle) Layout(gtx C) D {
+	return material.EditorStyle(*e).Layout(gtx)
+}