Rename createLocalFile to createNativeFile & deprecate createLocalFile

As it was confusing to use the term local file when referring
to a file that was accessible using native APIs and not just
a file that was on a hard disk somewhere already the function
name has been changed.

By renaming it to createNativeFile we keep it consistant with QFileInfo
which has an isNativeFile() function too.

Test also added.

Task-number: QTBUG-3169

Change-Id: I410e7ed28133d68fd312c6c0faf3f7191460d7ce
Reviewed-by: João Abecasis <joao@abecasis.name>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/io/qtemporaryfile.cpp

@@ -700,6 +700,21 @@ void QTemporaryFile::setFileTemplate(const QString &name)
 /*!
   \fn QTemporaryFile *QTemporaryFile::createLocalFile(const QString &fileName)
   \overload
+  \obsolete
+
+  Use QTemporaryFile::createNativeFile(const QString &fileName) instead.
+*/
+
+/*!
+  \fn QTemporaryFile *QTemporaryFile::createLocalFile(QFile &file)
+  \obsolete
+
+  Use QTemporaryFile::createNativeFile(QFile &file) instead.
+*/
+
+/*!
+  \fn QTemporaryFile *QTemporaryFile::createNativeFile(const QString &fileName)
+  \overload
 
   Works on the given \a fileName rather than an existing QFile
   object.
@@ -707,16 +722,27 @@ void QTemporaryFile::setFileTemplate(const QString &name)
 
 
 /*!
-  If \a file is not on a local disk, a temporary file is created
+  If \a file is not already a native file then a QTemporaryFile is created
-  on a local disk, \a file is copied into the temporary local file,
+  in the tempPath() and \a file is copied into the temporary file, then a
-  and a pointer to the temporary local file is returned. If \a file
+  pointer to the temporary file is returned. If \a file is already a native
-  is already on a local disk, a copy is not created and 0 is returned.
+  file, a QTemporaryFile is not created, no copy is made and 0 is returned.
+
+  For example:
+
+  QFile f(":/resources/file.txt");
+  QTemporaryFile::createNativeFile(f); // Returns a pointer to a temporary file
+
+  QFile f("/users/qt/file.txt");
+  QTemporaryFile::createNativeFile(f); // Returns 0
+
+  \sa QFileInfo::isNativePath()
 */
-QTemporaryFile *QTemporaryFile::createLocalFile(QFile &file)
+
+QTemporaryFile *QTemporaryFile::createNativeFile(QFile &file)
 {
     if (QAbstractFileEngine *engine = file.d_func()->engine()) {
         if(engine->fileFlags(QAbstractFileEngine::FlagsMask) & QAbstractFileEngine::LocalDiskFlag)
-            return 0; //local already
+            return 0; //native already
         //cache
         bool wasOpen = file.isOpen();
         qint64 old_off = 0;

src/corelib/io/qtemporaryfile.h

@@ -83,10 +83,15 @@ public:
     QString fileName() const;
     QString fileTemplate() const;
     void setFileTemplate(const QString &name);
-
+#if QT_DEPRECATED_SINCE(5,1)
-    inline static QTemporaryFile *createLocalFile(const QString &fileName)
+    QT_DEPRECATED inline static QTemporaryFile *createLocalFile(const QString &fileName)
-        { QFile file(fileName); return createLocalFile(file); }
+        { return createNativeFile(fileName); }
-    static QTemporaryFile *createLocalFile(QFile &file);
+    QT_DEPRECATED inline static QTemporaryFile *createLocalFile(QFile &file)
+        { return createNativeFile(file); }
+#endif
+    inline static QTemporaryFile *createNativeFile(const QString &fileName)
+        { QFile file(fileName); return createNativeFile(file); }
+    static QTemporaryFile *createNativeFile(QFile &file);
 
 protected:
     bool open(OpenMode flags);

tests/auto/corelib/io/qtemporaryfile/qtemporaryfile.pro

@@ -5,3 +5,4 @@ QT = core testlib
 SOURCES = tst_qtemporaryfile.cpp
 TESTDATA += tst_qtemporaryfile.cpp
 DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0
+RESOURCES += qtemporaryfile.qrc

tests/auto/corelib/io/qtemporaryfile/qtemporaryfile.qrc

@@ -0,0 +1,5 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+     <file>resources/test.txt</file>
+</qresource>
+</RCC>

tests/auto/corelib/io/qtemporaryfile/resources/test.txt

@@ -0,0 +1 @@
+This is a test

tests/auto/corelib/io/qtemporaryfile/tst_qtemporaryfile.cpp

@@ -88,7 +88,8 @@ private slots:
     void resetTemplateAfterError();
     void setTemplateAfterOpen();
     void autoRemoveAfterFailedRename();
-
+    void createNativeFile_data();
+    void createNativeFile();
     void QTBUG_4796_data();
     void QTBUG_4796();
 };
@@ -633,6 +634,41 @@ void tst_QTemporaryFile::autoRemoveAfterFailedRename()
     cleaner.reset();
 }
 
+void tst_QTemporaryFile::createNativeFile_data()
+{
+    QTest::addColumn<QString>("filePath");
+    QTest::addColumn<qint64>("currentPos");
+    QTest::addColumn<bool>("valid");
+    QTest::addColumn<QByteArray>("content");
+
+    QTest::newRow("nativeFile") << QFINDTESTDATA("resources/test.txt") << (qint64)-1 << false << QByteArray();
+    QTest::newRow("nativeFileWithPos") << QFINDTESTDATA("resources/test.txt") << (qint64)5 << false << QByteArray();
+    QTest::newRow("resourceFile") << ":/resources/test.txt" << (qint64)-1 << true << QByteArray("This is a test");
+    QTest::newRow("resourceFileWithPos") << ":/resources/test.txt" << (qint64)5 << true << QByteArray("This is a test");
+}
+
+void tst_QTemporaryFile::createNativeFile()
+{
+    QFETCH(QString, filePath);
+    QFETCH(qint64, currentPos);
+    QFETCH(bool, valid);
+    QFETCH(QByteArray, content);
+
+    QFile f(filePath);
+    if (currentPos != -1) {
+        f.open(QIODevice::ReadOnly);
+        f.seek(currentPos);
+    }
+    QTemporaryFile *tempFile = QTemporaryFile::createNativeFile(f);
+    QVERIFY(valid == (bool)tempFile);
+    if (currentPos != -1)
+        QCOMPARE(currentPos, f.pos());
+    if (valid) {
+        QCOMPARE(content, tempFile->readAll());
+        delete tempFile;
+    }
+}
+
 void tst_QTemporaryFile::QTBUG_4796_data()
 {
     QTest::addColumn<QString>("prefix");