QIntValidator: Intermediate for number if digits equal or less than max

Input value which is over the highest acceptable value, but consisting
of a number of digits equal to or less than the max value should be
considered intermediate.

[ChangeLog][QtGui][QIntValidator] Input value with over the highest
acceptable value, but with equal or less amount of digits than the maximum
value is now considered intermediate.

Task-number: QTBUG-59650
Change-Id: I71a77c9c266f0f3b62c71ac6cb995019385c1cf5
Reviewed-by: Andy Shaw <andy.shaw@qt.io>

src/gui/util/qvalidator.cpp

@@ -411,13 +411,15 @@ QValidator::State QIntValidator::validate(QString & input, int&) const
     if (buff.isEmpty())
         return Intermediate;
 
-    if (b >= 0 && buff.startsWith('-'))
+    const bool startsWithMinus(buff[0] == '-');
+    if (b >= 0 && startsWithMinus)
         return Invalid;
 
-    if (t < 0 && buff.startsWith('+'))
+    const bool startsWithPlus(buff[0] == '+');
+    if (t < 0 && startsWithPlus)
         return Invalid;
 
-    if (buff.size() == 1 && (buff.at(0) == '+' || buff.at(0) == '-'))
+    if (buff.size() == 1 && (startsWithPlus || startsWithMinus))
         return Intermediate;
 
     bool ok;
@@ -433,7 +435,15 @@ QValidator::State QIntValidator::validate(QString & input, int&) const
     if (entered >= 0) {
         // the -entered < b condition is necessary to allow people to type
         // the minus last (e.g. for right-to-left languages)
-        return (entered > t && -entered < b) ? Invalid : Intermediate;
+        // The buffLength > tLength condition validates values consisting
+        // of a number of digits equal to or less than the max value as intermediate.
+
+        int buffLength = buff.size();
+        if (startsWithPlus)
+            buffLength--;
+        const int tLength = t != 0 ? static_cast<int>(std::log10(qAbs(t))) + 1 : 1;
+
+        return (entered > t && -entered < b && buffLength > tLength) ? Invalid : Intermediate;
     } else {
         return (entered < b) ? Invalid : Intermediate;
     }

tests/auto/gui/util/qintvalidator/tst_qintvalidator.cpp

@@ -54,7 +54,7 @@ void tst_QIntValidator::validate_data()
     QTest::addColumn<QValidator::State>("state");
 
     QTest::newRow("data0") << 0 << 100 << QString("50") << ACC;
-    QTest::newRow("data1") << 0 << 100 << QString("500") << INV;
+    QTest::newRow("data1") << 0 << 100 << QString("500") << INT;
     QTest::newRow("data1a") << 0 << 100 << QString("5000") << INV;
     QTest::newRow("data1b") << -100 << 0 << QString("50") << INT;
     QTest::newRow("data1c") << -100 << 0 << QString("500") << INV;
@@ -121,7 +121,7 @@ void tst_QIntValidator::validate_data()
 
     QTest::newRow("5.1") << 6 << 8 << QString("5") << INT;
     QTest::newRow("5.2") << 6 << 8 << QString("7") << ACC;
-    QTest::newRow("5.3") << 6 << 8 << QString("9") << INV;
+    QTest::newRow("5.3") << 6 << 8 << QString("9") << INT;
     QTest::newRow("5.3a") << 6 << 8 << QString("19") << INV;
     QTest::newRow("5.4") << -8 << -6 << QString("-5") << INT;
     QTest::newRow("5.5") << -8 << -6 << QString("-7") << ACC;
@@ -129,13 +129,13 @@ void tst_QIntValidator::validate_data()
     QTest::newRow("5.6a") << -8 << -6 << QString("-19") << INV;
     QTest::newRow("5.7") << -8 << -6 << QString("5") << INT;
     QTest::newRow("5.8") << -8 << -6 << QString("7") << INT;
-    QTest::newRow("5.9") << -8 << -6 << QString("9") << INV;
+    QTest::newRow("5.9") << -8 << -6 << QString("9") << INT;
     QTest::newRow("5.10") << -6 << 8 << QString("-5") << ACC;
     QTest::newRow("5.11") << -6 << 8 << QString("5") << ACC;
     QTest::newRow("5.12") << -6 << 8 << QString("-7") << INV;
     QTest::newRow("5.13") << -6 << 8 << QString("7") << ACC;
     QTest::newRow("5.14") << -6 << 8 << QString("-9") << INV;
-    QTest::newRow("5.15") << -6 << 8 << QString("9") << INV;
+    QTest::newRow("5.15") << -6 << 8 << QString("9") << INT;
 
     QTest::newRow("6.1") << 100 << 102 << QString("11") << INT;
     QTest::newRow("6.2") << 100 << 102 << QString("-11") << INV;

tests/auto/widgets/widgets/qlineedit/tst_qlineedit.cpp

@@ -2664,9 +2664,9 @@ void tst_QLineEdit::setValidator_QIntValidator_data()
             << 0
             << 100
             << QString("153")
-            << QString(useKeys ? "15" : "")
+            << QString("153")
             << bool(useKeys)
-            << bool(useKeys ? true : false)
+            << bool(false)
             << uint(QLineEdit::Normal);
         QTest::newRow(QString(inputMode + "range [-100,100] int '-153'").toLatin1())
             << -100
@@ -2687,7 +2687,7 @@ void tst_QLineEdit::setValidator_QIntValidator_data()
         QTest::newRow(QString(inputMode + "range [3,7] int '8'").toLatin1())
             << 3
             << 7
-            << QString("8")
+            << QString("")
             << QString("")
             << bool(useKeys)
             << bool(false)
@@ -3292,7 +3292,7 @@ void tst_QLineEdit::editInvalidText()
 {
     QLineEdit *testWidget = ensureTestWidget();
     testWidget->clear();
-    testWidget->setValidator(new QIntValidator(0, 120, 0));
+    testWidget->setValidator(new QIntValidator(0, 12, 0));
     testWidget->setText("1234");
 
     QVERIFY(!testWidget->hasAcceptableInput());