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widget: add Editor.MaxLen for limiting the content length og Editor

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Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2022-07-13 18:45:02 +02:00
parent 48e9cdaffd
commit 1d9ab65313
2 changed files with 53 additions and 5 deletions
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widget/editor_test.go
+31
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@@ -947,6 +947,37 @@ func TestEditor_WriteTo(t *testing.T) {
}
}
func TestEditor_MaxLen(t *testing.T) {
e := new(Editor)
e.MaxLen = 8
e.SetText("123456789")
if got, want := e.Text(), "12345678"; got != want {
t.Errorf("editor failed to cap SetText")
}
e.SetText("2345678")
gtx := layout.Context{
Ops: new(op.Ops),
Constraints: layout.Exact(image.Pt(100, 100)),
Queue: newQueue(
key.EditEvent{Range: key.Range{Start: 0, End: 0}, Text: "1234"},
key.SelectionEvent{Start: 4, End: 4},
),
}
cache := text.NewCache(gofont.Collection())
fontSize := unit.Sp(10)
font := text.Font{}
e.Layout(gtx, cache, font, fontSize, nil)
if got, want := e.Text(), "12345678"; got != want {
t.Errorf("editor failed to cap EditEvent")
}
if start, end := e.Selection(); start != 1 || end != 1 {
t.Errorf("editor failed to adjust SelectionEvent")
}
}
func textWidth(e *Editor, lineNum, colStart, colEnd int) float32 {
var w fixed.Int26_6
glyphs := e.lines[lineNum].Layout.Glyphs