QmlDesigner: Refactor import handling in ChangeImportsVisitor

- Introduced `isEqual` function to encapsulate import comparison logic.
- Added `versions` method to `Import` class to return version as an
array.
- Utilized `<ranges>` and `CoreUtils::toDefaultInitializedArray` for
cleaner, allocation-free version parsing.
- Updated `ChangeImportsVisitor::equals` to use `isEqual` and the new
`versions` method.

Change-Id: I5693c1750831b3db3b52e5707aa69b1d068ecb27
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/libs/designercore/filemanager/changeimportsvisitor.cpp

@@ -61,23 +61,27 @@ bool ChangeImportsVisitor::remove(QmlJS::AST::UiProgram *ast, const Import &impo
     return didRewriting();
 }
 
+namespace {
+bool isEqual(QmlJS::AST::UiImport *ast, const Import &import)
+{
+    if (import.isLibraryImport())
+        return toString(ast->importUri) == import.url();
+    else if (import.isFileImport())
+        return ast->fileName == import.file();
+
+    return false;
+}
+} // namespace
+
 bool ChangeImportsVisitor::equals(QmlJS::AST::UiImport *ast, const Import &import)
 {
-    bool equal = false;
-    if (import.isLibraryImport())
-        equal = toString(ast->importUri) == import.url();
-    else if (import.isFileImport())
-        equal = ast->fileName == import.file();
-
-    if (equal && ast->version) {
-        const QStringList versions = import.version().split('.');
-        if (versions.size() >= 1 && versions[0].toInt() == ast->version->majorVersion) {
-            if (versions.size() >= 2)
-                equal = versions[1].toInt() == ast->version->minorVersion;
-            else
-                equal = ast->version->minorVersion == 0;
+    if (isEqual(ast, import)) {
+        if (ast->version) {
+            return std::array{ast->version->majorVersion, ast->version->minorVersion}
+                   == import.versions();
         }
+        return true;
     }
 
-    return equal;
+    return false;
 }

src/plugins/qmldesigner/libs/designercore/include/import.h

@@ -41,6 +41,8 @@ public:
     const QString &alias() const { return m_alias; }
     const QStringList &importPaths() const { return m_importPathList; }
 
+    std::array<int, 2> versions() const;
+
     QString toString(bool skipAlias = false, bool skipVersion = false) const;
     QString toImportString() const;
 

src/plugins/qmldesigner/libs/designercore/model/import.cpp

@@ -3,14 +3,20 @@
 
 #include "import.h"
 
+#include <qmldesignerutils/designeralgorithm.h>
 #include <qmldesignerutils/version.h>
 
 #include <QHash>
 
 #include <QStringView>
+#include <QVarLengthArray>
+
+#include <ranges>
 
 namespace QmlDesigner {
 
+using namespace Qt::StringLiterals;
+
 Import Import::createLibraryImport(const QString &url, const QString &version, const QString &alias, const QStringList &importPaths)
 {
     return Import(url, version, alias, importPaths, Type::Library);
@@ -31,6 +37,24 @@ bool Import::hasVersion() const
     return !m_version.isEmpty() && m_version != "-1.-1";
 }
 
+std::array<int, 2> Import::versions() const
+{
+    QStringView version = m_version;
+
+#if defined(__GNUC__) && !defined(__clang__) && (__GNUC__ < 12)
+    auto toInteger = [](auto &&entry) {
+        QVarLengthArray<QChar, 12> string;
+        std::ranges::copy(entry, std::back_inserter(string));
+        return QStringView{string}.toInt();
+    };
+#else
+    auto toInteger = [](QStringView entry) { return entry.toInt(); };
+#endif
+
+    return CoreUtils::toDefaultInitializedArray<int, 2>(version | std::views::split('.'_L1)
+                                                        | std::views::transform(toInteger));
+}
+
 QString Import::toImportString() const
 {
     QString result = QStringLiteral("import ");

src/plugins/qmldesigner/libs/qmldesignerutils/designeralgorithm.h

@@ -52,4 +52,14 @@ constexpr auto to(View &&view, std::integral auto reserve)
     return container;
 }
 
+template<typename Type, std::size_t size, std::ranges::view View>
+constexpr auto toDefaultInitializedArray(View &&view)
+{
+    std::array<Type, size> container{};
+
+    std::ranges::copy(view | std::views::take(size), container.begin());
+
+    return container;
+}
+
 } // namespace QmlDesigner::CoreUtils