added removal of trailing zeros

src/framework/uicomponents/CMakeLists.txt

@@ -120,6 +120,11 @@ if (MUSE_MODULE_UI_DISABLE_MODALITY)
 endif()
 
 set(MODULE_USE_UNITY OFF)
+
 setup_module()
 
+if (MUSE_MODULE_UI_TESTS)
+    add_subdirectory(tests)
+endif()
+
 

src/framework/uicomponents/tests/CMakeLists.txt

@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: GPL-3.0-only
+# MuseScore-CLA-applies
+#
+# MuseScore
+# Music Composition & Notation
+#
+# Copyright (C) 2021 MuseScore BVBA and others
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+set(MODULE_TEST muse_uicomponents_tests)
+
+set(MODULE_TEST_SRC
+    ${CMAKE_CURRENT_LIST_DIR}/doubleinputvalidator_tests.cpp
+    )
+
+set(MODULE_TEST_LINK
+    muse_uicomponents
+    )
+
+include(SetupGTest)

src/framework/uicomponents/tests/doubleinputvalidator_tests.cpp

@@ -0,0 +1,100 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-only
+ * MuseScore-CLA-applies
+ *
+ * MuseScore
+ * Music Composition & Notation
+ *
+ * Copyright (C) 2024 MuseScore BVBA and others
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#include <gtest/gtest.h>
+
+#include "uicomponents/view/validators/doubleinputvalidator.h"
+
+using namespace muse;
+using namespace muse::uicomponents;
+
+namespace muse::uicomponents {
+class DoubleInputValidatorTests : public ::testing::Test, public QObject
+{
+public:
+    void SetUp() override
+    {
+        m_validator = new DoubleInputValidator(nullptr);
+        m_validator->setTop(100.0);
+        m_validator->setBottom(-100.0);
+        m_validator->setDecimal(2);
+    }
+
+    void TearDown() override
+    {
+        delete m_validator;
+    }
+
+protected:
+    DoubleInputValidator* m_validator = nullptr;
+};
+
+TEST_F(DoubleInputValidatorTests, Validate_ValidInputs) {
+    std::vector<QString> validInputs = {
+        "-0.1",
+        "0",
+        "1.23",
+        "99.99",
+        "-100",
+        "2.5"
+    };
+
+    int pos = 0;
+    for (QString& input : validInputs) {
+        EXPECT_EQ(m_validator->validate(input, pos), QValidator::Acceptable);
+
+        QString fixInput = input;
+        m_validator->fixup(fixInput);
+        EXPECT_EQ(input, fixInput);
+    }
+}
+
+TEST_F(DoubleInputValidatorTests, Validate_InvalidInputs) {
+    struct Input
+    {
+        QString str;
+        QValidator::State expectedState;
+        QString fixedStr;
+    };
+
+    std::vector<Input> validInputs = {
+        { "0.0", QValidator::Intermediate, "0" },
+        { "00.", QValidator::Intermediate, "0" },
+        { "2.00", QValidator::Intermediate, "2" },
+        { "2.", QValidator::Intermediate, "2" },
+        { "-100.1", QValidator::Intermediate, "-100" },
+        { "100.1", QValidator::Intermediate, "100" },
+        { "1.123", QValidator::Intermediate, "1.12" },
+        { "abc", QValidator::Invalid, "" }
+    };
+
+    int pos = 0;
+    for (Input& input : validInputs) {
+        EXPECT_EQ(m_validator->validate(input.str, pos), input.expectedState);
+
+        if (QValidator::Intermediate == input.expectedState) {
+            QString fixInput = input.str;
+            m_validator->fixup(fixInput);
+            EXPECT_EQ(input.fixedStr, fixInput);
+        }
+    }
+}
+}

src/framework/uicomponents/view/validators/doubleinputvalidator.cpp

@@ -31,67 +31,86 @@ DoubleInputValidator::DoubleInputValidator(QObject* parent)
 
 void DoubleInputValidator::fixup(QString& string) const
 {
-    auto zeros = [](int num)->QString {
-        QString s = QString();
-        for (int i = 0; i < num; i++) {
-            s.append("0");
+    auto removeTrailingZeros = [](QString str)->QString {
+        QString s = str;
+
+        if (!s.contains('.')) {
+            return s;
+        }
+
+        size_t num = s.size();
+        for (size_t i = num - 1; i > 0; i--) {
+            if (s[i] == '0') {
+                s.remove(i, 1);
+            } else if (s[i] == '.') {
+                s.remove(i, 1);
+                break;
+            } else {
+                break;
+            }
         }
         return s;
     };
 
-    if (!string.contains(".")) {
-        string.append("." + zeros(m_decimal));
-    }
-
     if (string.startsWith(".")) {
         string.prepend("0");
     }
 
     if (string.endsWith(".")) {
-        string.append(zeros(m_decimal));
+        string.remove(string.size() - 1, 1);
     }
 
     QStringList strList = string.split(".", Qt::SkipEmptyParts);
 
     QString intPart = strList.at(0);
-    QString floatPart = strList.at(1);
-
-    if (floatPart.length() < m_decimal) {
-        floatPart.append(zeros(m_decimal - floatPart.length()));
-    }
+    QString floatPart = strList.size() > 1 ? strList.at(1) : 0;
 
     if (intPart.contains(QRegularExpression("^0{1,3}$"))) {
         intPart = QString("0");
     } else if (intPart.contains(QRegularExpression("^\\-0{0,3}$"))) {
         intPart = QString("-0");
     }
 
-    if (intPart == QString("-0") && floatPart == zeros(m_decimal)) {
+    if (intPart == QString("-0") && floatPart.isEmpty()) {
         intPart = QString("0");
     }
 
+    if (floatPart.size() > m_decimal) {
+        floatPart = floatPart.remove(m_decimal, floatPart.size() - m_decimal);
+    }
+
     string = QString("%1.%2").arg(intPart).arg(floatPart);
 
     if (string.toDouble() > m_top) {
         string = QString::number(m_top, 'f', m_decimal);
     } else if (string.toDouble() < m_bottom) {
         string = QString::number(m_bottom, 'f', m_decimal);
     }
+
+    string = removeTrailingZeros(string);
 }
 
 QValidator::State DoubleInputValidator::validate(QString& inputStr, int& cursorPos) const
 {
     QValidator::State state = Invalid;
 
-    if (inputStr.contains(QRegularExpression(QString("^\\-?\\d{1,3}\\.\\d{%1}$").arg(m_decimal)))) {
-        if (inputStr.contains(QRegularExpression("^\\-?0{2,3}\\."))
-            || (inputStr.startsWith("-") && muse::RealIsNull(inputStr.toDouble()))) {
+    static const QRegularExpression validRegex(QString("^\\-?\\d{1,3}(\\.\\d{1,%1})?$").arg(m_decimal));
+
+    if (inputStr.contains(validRegex)) {
+        static const QRegularExpression invalidZeroRegex("^\\-?0{2,3}\\."); // for '-000.'
+        static const QRegularExpression invalidTrailingZeroRegex("^\\-?\\d+\\.0{1,}$"); // for '1.00'
+        static const QRegularExpression invalidTrailingDotRegex("^\\-?\\d+\\.$"); // for '1.'
+
+        if (inputStr.contains(invalidZeroRegex)
+            || (inputStr.startsWith("-") && muse::RealIsNull(inputStr.toDouble())) // for "-000"
+            || inputStr.contains(invalidTrailingZeroRegex)
+            || inputStr.contains(invalidTrailingDotRegex)) {
             state = Intermediate;
         } else {
             state = Acceptable;
         }
     } else if (inputStr.contains(QRegularExpression("^\\-?\\d{0,3}\\.?$"))
-               || inputStr.contains(QRegularExpression(QString("^\\-?\\d{0,3}\\.\\d{0,%1}$").arg(m_decimal)))) {
+               || inputStr.contains(QRegularExpression(QString("^\\-?\\d{0,3}\\.\\d{%1,}$").arg(m_decimal)))) {
         state = Intermediate;
     } else {
         cursorPos = 0;