Update QFileSelector to use QSysInfo better

This reduces a bit of string duplication by relying on the constants
defined in qglobal.cpp and detection via uname(2), in addition to adding
the Linux distribution name as a selector.

Change-Id: I64a46a0fc552c399db787125b1b32aae5c50056f
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Alan Alpert <aalpert@blackberry.com>

src/corelib/io/qfileselector.cpp

@@ -145,7 +145,9 @@ QFileSelectorPrivate::QFileSelectorPrivate()
     Selectors normally available are
     \list
     \li platform, any of the following strings which match the platform the application is running
-        on: android, blackberry, ios, osx, darwin, mac, linux, wince, unix, windows.
+        on (list not exhaustive): android, blackberry, ios, osx, darwin, mac, linux, wince, unix,
+        windows. On Linux, if it can be determined, the name of the distribution too, like debian,
+        fedora or opensuse.
     \li locale, same as QLocale::system().name().
     \endlist
 
@@ -351,10 +353,10 @@ QStringList QFileSelectorPrivate::platformSelectors()
     // similar, but not identical to QSysInfo::osType
     QStringList ret;
 #if defined(Q_OS_WIN)
+    // can't fall back to QSysInfo because we need both "winphone" and "winrt" for the Windows Phone case
     ret << QStringLiteral("windows");
-#  if defined(Q_OS_WINCE)
-    ret << QStringLiteral("wince");
-#  elif defined(Q_OS_WINRT)
+    ret << QSysInfo::kernelType();  // "wince" and "winnt"
+#  if defined(Q_OS_WINRT)
     ret << QStringLiteral("winrt");
 #    if defined(Q_OS_WINPHONE)
     ret << QStringLiteral("winphone");
@@ -362,25 +364,16 @@ QStringList QFileSelectorPrivate::platformSelectors()
 #  endif
 #elif defined(Q_OS_UNIX)
     ret << QStringLiteral("unix");
-#  if defined(Q_OS_ANDROID)
-    ret << QStringLiteral("android");
-#  elif defined(Q_OS_BLACKBERRY)
-    ret << QStringLiteral("blackberry");
-#  elif defined(Q_OS_QNX)
-    ret << QStringLiteral("qnx");
-#  elif defined(Q_OS_LINUX)
-    ret << QStringLiteral("linux");
-#  elif defined(Q_OS_DARWIN)
-    ret << QStringLiteral("darwin");
-    ret << QStringLiteral("mac"); // compatibility synonym
-#    if defined(Q_OS_IOS)
-    ret << QStringLiteral("ios");
-#    elif defined(Q_OS_OSX)
-    ret << QStringLiteral("osx");
-#    endif
-#  else
+#  if !defined(Q_OS_ANDROID) && !defined(Q_OS_BLACKBERRY)
+    // we don't want "linux" for Android or "qnx" for Blackberry here
     ret << QSysInfo::kernelType();
+#     ifdef Q_OS_MAC
+    ret << QStringLiteral("mac"); // compatibility, since kernelType() is "darwin"
+#     endif
 #  endif
+    QString productName = QSysInfo::productType();
+    if (productName != QLatin1String("unknown"))
+        ret << productName; // "opensuse", "fedora", "osx", "ios", "blackberry", "android"
 #endif
     return ret;
 }

tests/auto/corelib/io/qfileselector/qfileselector.qrc

@@ -10,6 +10,8 @@
    <file>extras/+custom3/+custom4/test</file>
    <file>extras/+custom3/+custom5/test</file>
    <file>extras/+custom5/+custom3/test</file>
+
+   <!-- platforms/test: deepest possible selection -->
    <file>platforms/test</file>
    <file>platforms/+unix/+android/test</file>
    <file>platforms/+unix/+blackberry/test</file>
@@ -17,18 +19,11 @@
    <file>platforms/+unix/+darwin/+mac/+osx/test</file>
    <file>platforms/+unix/+darwin/+mac/test</file>
    <file>platforms/+unix/+darwin/test</file>
-   <file>platforms/+windows/+wince/test</file>
-   <file>platforms/+windows/test</file>
-   <file>platforms/+windows/test2</file>
    <file>platforms/+unix/+linux/test</file>
    <file>platforms/+unix/test</file>
-   <file>platforms/test2</file>
-   <file>platforms/+android/test2</file>
-   <file>platforms/+blackberry/test2</file>
-   <file>platforms/+ios/test2</file>
-   <file>platforms/+osx/test2</file>
-   <file>platforms/+linux/test2</file>
-   <file>platforms/+wince/test2</file>
+   <file>platforms/+windows/+wince/test</file>
+   <file>platforms/+windows/+winnt/test</file>
+   <file>platforms/+windows/test</file>
    <file>platforms/+android/test</file>
    <file>platforms/+blackberry/test</file>
    <file>platforms/+ios/test</file>
@@ -37,5 +32,20 @@
    <file>platforms/+mac/test</file>
    <file>platforms/+linux/test</file>
    <file>platforms/+wince/test</file>
+
+   <!-- platforms/test2: shallow selection for the deepest selector -->
+   <file>platforms/test2</file>
+   <file>platforms/+android/test2</file>
+   <file>platforms/+blackberry/test2</file>
+   <file>platforms/+ios/test2</file>
+   <file>platforms/+osx/test2</file>
+   <file>platforms/+linux/test2</file>
+   <file>platforms/+wince/test2</file>
+   <file>platforms/+winnt/test2</file>
+
+   <!-- platforms/test3: selection for the family only -->
+   <file>platforms/test3</file>
+   <file>platforms/+windows/test3</file>
+   <file>platforms/+unix/test3</file>
 </qresource>
 </RCC>

tests/auto/corelib/io/qfileselector/tst_qfileselector.cpp

@@ -84,8 +84,10 @@ void tst_QFileSelector::basicTest_data()
 
     QString test("/test");// '/' is here so dir string can also be selector string
     QString test2("/test2");
+    QString test3("/test3");
     QString expectedPlatform1File(":/platforms");
     QString expectedPlatform2File(""); //Only the last selector
+    QString expectedPlatform3File; // Only the first selector (the family)
 #if defined(Q_OS_UNIX) && !defined(Q_OS_ANDROID) && !defined(Q_OS_BLACKBERRY) && \
     !defined(Q_OS_DARWIN) && !defined(Q_OS_LINUX)
     /* We are only aware of specific unixes, and do not have test files for any of the others.
@@ -96,14 +98,26 @@ void tst_QFileSelector::basicTest_data()
         + QString("unix/test");
     expectedPlatform2File = QString(":/platforms/test2");
 #else
+    QString distributionName;
+#  if (defined(Q_OS_LINUX) && !defined(Q_OS_ANDROID)) || defined(Q_OS_FREEBSD)
+    distributionName = QSysInfo::productType();
+#  endif
     foreach (const QString &selector, QFileSelectorPrivate::platformSelectors()) {
+        // skip the Linux distribution name (if any) since we don't have files for them
+        if (selector == distributionName)
+            continue;
+
         expectedPlatform1File = expectedPlatform1File + QLatin1Char('/') + QLatin1Char(selectorIndicator)
             + selector;
         expectedPlatform2File = selector;
+        if (expectedPlatform3File.isNull())
+            expectedPlatform3File = selector;
     }
     expectedPlatform1File += test;
     expectedPlatform2File = QLatin1String(":/platforms/") + QLatin1Char(selectorIndicator)
         + expectedPlatform2File + test2;
+    expectedPlatform3File = QLatin1String(":/platforms/") + QLatin1Char(selectorIndicator)
+        + expectedPlatform3File + test3;
 #endif
 
     QTest::newRow("platform1") <<  QString(":/platforms/test") << QStringList()
@@ -112,6 +126,9 @@ void tst_QFileSelector::basicTest_data()
     QTest::newRow("platform2") <<  QString(":/platforms/test2") << QStringList()
         << expectedPlatform2File;
 
+    QTest::newRow("platform3") << QString(":/platforms/test3") << QStringList()
+                               << expectedPlatform3File;
+
     QString resourceTestPath(":/extras/test");
     QString custom1("custom1");
     QTest::newRow("custom1-noselector") << resourceTestPath << QStringList()