QPlainTextEdit: Take vertical offset into account when answering input method queries.

Determine offset point to similar to QTextEdit::inputMethodQuery()
and add an autotest.

Task-number: QTBUG-51923
Change-Id: I8232eb348063e2cd95d0632fe74a6eb30c897eda
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/auto/widgets/widgets/qplaintextedit/tst_qplaintextedit.cpp b/tests/auto/widgets/widgets/qplaintextedit/tst_qplaintextedit.cpp
index 2145260013..d466489acb 100644
--- a/tests/auto/widgets/widgets/qplaintextedit/tst_qplaintextedit.cpp
+++ b/tests/auto/widgets/widgets/qplaintextedit/tst_qplaintextedit.cpp
@@ -154,6 +154,7 @@ private slots:
 #ifndef QT_NO_CONTEXTMENU
     void contextMenu();
 #endif
+    void inputMethodCursorRect();
 
 private:
     void createSelection();
@@ -1727,5 +1728,17 @@ void tst_QPlainTextEdit::contextMenu()
 }
 #endif // QT_NO_CONTEXTMENU
 
+// QTBUG-51923: Verify that the cursor rectangle returned by the input
+// method query correctly reflects the viewport offset.
+void tst_QPlainTextEdit::inputMethodCursorRect()
+{
+    ed->setPlainText("Line1\nLine2Line3\nLine3");
+    ed->moveCursor(QTextCursor::End);
+    const QRectF cursorRect = ed->cursorRect();
+    const QVariant cursorRectV = ed->inputMethodQuery(Qt::ImCursorRectangle);
+    QCOMPARE(cursorRectV.type(), QVariant::RectF);
+    QCOMPARE(cursorRectV.toRect(), cursorRect.toRect());
+}
+
 QTEST_MAIN(tst_QPlainTextEdit)
 #include "tst_qplaintextedit.moc"