QtGui: eradicate Q_FOREACH loops [needing qAsConst()]

... by replacing them with C++11 range-for loops.
To avoid detaches of these mutable Qt containers,
wrap the container in qAsConst().

Change-Id: I90fd517ad542ef92034403c15ebb8300a56ac693
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>

src/gui/image/qicon.cpp

@@ -442,7 +442,7 @@ void QPixmapIconEngine::addFile(const QString &fileName, const QSize &size, QIco
             }
         }
     }
-    foreach (const QImage &i, icoImages)
+    for (const QImage &i : qAsConst(icoImages))
         pixmaps += QPixmapIconEngineEntry(abs, i, mode, state);
     if (icoImages.isEmpty() && !ignoreSize) // Add placeholder with the filename and empty pixmap for the size.
         pixmaps += QPixmapIconEngineEntry(abs, size, mode, state);

src/gui/itemmodels/qstandarditemmodel.cpp

@@ -3032,9 +3032,8 @@ QMimeData *QStandardItemModel::mimeData(const QModelIndexList &indexes) const
     }
 
     stack.reserve(itemsSet.count());
-    foreach (QStandardItem *item, itemsSet) {
+    for (QStandardItem *item : qAsConst(itemsSet))
         stack.push(item);
-    }
 
     //stream everything recursively
     while (!stack.isEmpty()) {

src/gui/kernel/qguiapplication.cpp

@@ -990,9 +990,8 @@ qreal QGuiApplication::devicePixelRatio() const
     }
 
     topDevicePixelRatio = 1.0; // make sure we never return 0.
-    foreach (QScreen *screen, QGuiApplicationPrivate::screen_list) {
+    for (QScreen *screen : qAsConst(QGuiApplicationPrivate::screen_list))
         topDevicePixelRatio = qMax(topDevicePixelRatio, screen->devicePixelRatio());
-    }
 
     return topDevicePixelRatio;
 }
@@ -1127,7 +1126,7 @@ static void init_platform(const QString &pluginArgument, const QString &platform
     // 2) Ask the platform integration for a list of theme names
     themeNames += QGuiApplicationPrivate::platform_integration->themeNames();
     // 3) Look for a theme plugin.
-    foreach (const QString &themeName, themeNames) {
+    for (const QString &themeName : qAsConst(themeNames)) {
         QGuiApplicationPrivate::platform_theme = QPlatformThemeFactory::create(themeName, platformPluginPath);
         if (QGuiApplicationPrivate::platform_theme)
             break;
@@ -1136,7 +1135,7 @@ static void init_platform(const QString &pluginArgument, const QString &platform
     // 4) If no theme plugin was found ask the platform integration to
     // create a theme
     if (!QGuiApplicationPrivate::platform_theme) {
-        foreach (const QString &themeName, themeNames) {
+        for (const QString &themeName : qAsConst(themeNames)) {
             QGuiApplicationPrivate::platform_theme = QGuiApplicationPrivate::platform_integration->createPlatformTheme(themeName);
             if (QGuiApplicationPrivate::platform_theme)
                 break;
@@ -1153,7 +1152,7 @@ static void init_platform(const QString &pluginArgument, const QString &platform
     // boolean 'foo' or strings: 'foo=bar'
     if (!arguments.isEmpty()) {
         if (QObject *nativeInterface = QGuiApplicationPrivate::platform_integration->nativeInterface()) {
-            foreach (const QString &argument, arguments) {
+            for (const QString &argument : qAsConst(arguments)) {
                 const int equalsPos = argument.indexOf(QLatin1Char('='));
                 const QByteArray name =
                     equalsPos != -1 ? argument.left(equalsPos).toUtf8() : argument.toUtf8();

src/gui/kernel/qopenglcontext.cpp

@@ -653,7 +653,7 @@ void QOpenGLContext::destroy()
     delete d->functions;
     d->functions = 0;
 
-    foreach (QAbstractOpenGLFunctions *func, d->externalVersionFunctions) {
+    for (QAbstractOpenGLFunctions *func : qAsConst(d->externalVersionFunctions)) {
         QAbstractOpenGLFunctionsPrivate *func_d = QAbstractOpenGLFunctionsPrivate::get(func);
         func_d->owningContext = 0;
         func_d->initialized = false;

src/gui/kernel/qplatformcursor.cpp

@@ -52,9 +52,10 @@ QT_BEGIN_NAMESPACE
 QList<QPlatformCursor *> QPlatformCursorPrivate::getInstances()
 {
     QList<QPlatformCursor *> result;
-    foreach (const QScreen *screen, QGuiApplicationPrivate::screen_list)
+    for (const QScreen *screen : qAsConst(QGuiApplicationPrivate::screen_list)) {
         if (QPlatformCursor *cursor = screen->handle()->cursor())
             result.push_back(cursor);
+    }
     return result;
 }
 

src/gui/opengl/qopenglframebufferobject.cpp

@@ -943,7 +943,7 @@ QOpenGLFramebufferObject::~QOpenGLFramebufferObject()
     if (isBound())
         release();
 
-    foreach (const QOpenGLFramebufferObjectPrivate::ColorAttachment &color, d->colorAttachments) {
+    for (const auto &color : qAsConst(d->colorAttachments)) {
         if (color.guard)
             color.guard->free();
     }

src/gui/opengl/qopenglshaderprogram.cpp

@@ -986,7 +986,7 @@ void QOpenGLShaderProgram::removeAllShaders()
 {
     Q_D(QOpenGLShaderProgram);
     d->removingShaders = true;
-    foreach (QOpenGLShader *shader, d->shaders) {
+    for (QOpenGLShader *shader : qAsConst(d->shaders)) {
         if (d->programGuard && d->programGuard->id()
             && shader && shader->d_func()->shaderGuard)
         {

src/gui/text/qtextdocument_p.cpp

@@ -235,7 +235,7 @@ void QTextDocumentPrivate::clear()
 {
     Q_Q(QTextDocument);
 
-    foreach (QTextCursorPrivate *curs, cursors) {
+    for (QTextCursorPrivate *curs : qAsConst(cursors)) {
         curs->setPosition(0);
         curs->currentCharFormat = -1;
         curs->anchor = 0;
@@ -287,7 +287,7 @@ void QTextDocumentPrivate::clear()
 
 QTextDocumentPrivate::~QTextDocumentPrivate()
 {
-    foreach (QTextCursorPrivate *curs, cursors)
+    for (QTextCursorPrivate *curs : qAsConst(cursors))
         curs->priv = 0;
     cursors.clear();
     undoState = 0;
@@ -674,7 +674,7 @@ void QTextDocumentPrivate::remove(int pos, int length, QTextUndoCommand::Operati
     blockCursorAdjustment = true;
     move(pos, -1, length, op);
     blockCursorAdjustment = false;
-    foreach (QTextCursorPrivate *curs, cursors) {
+    for (QTextCursorPrivate *curs : qAsConst(cursors)) {
         if (curs->adjustPosition(pos, -length, op) == QTextCursorPrivate::CursorMoved) {
             curs->changed = true;
         }
@@ -1232,13 +1232,13 @@ void QTextDocumentPrivate::finishEdit()
     }
 
     QList<QTextCursor> changedCursors;
-    foreach (QTextCursorPrivate *curs, cursors) {
+    for (QTextCursorPrivate *curs : qAsConst(cursors)) {
         if (curs->changed) {
             curs->changed = false;
             changedCursors.append(QTextCursor(curs));
         }
     }
-    foreach (const QTextCursor &cursor, changedCursors)
+    for (const QTextCursor &cursor : qAsConst(changedCursors))
         emit q->cursorPositionChanged(cursor);
 
     contentsChanged();
@@ -1284,7 +1284,7 @@ void QTextDocumentPrivate::adjustDocumentChangesAndCursors(int from, int addedOr
     if (blockCursorAdjustment)  {
         ; // postpone, will be called again from QTextDocumentPrivate::remove()
     } else {
-        foreach (QTextCursorPrivate *curs, cursors) {
+        for (QTextCursorPrivate *curs : qAsConst(cursors)) {
             if (curs->adjustPosition(from, addedOrRemoved, op) == QTextCursorPrivate::CursorMoved) {
                 curs->changed = true;
             }
@@ -1731,7 +1731,7 @@ bool QTextDocumentPrivate::ensureMaximumBlockCount()
 void QTextDocumentPrivate::aboutToRemoveCell(int from, int to)
 {
     Q_ASSERT(from <= to);
-    foreach (QTextCursorPrivate *curs, cursors)
+    for (QTextCursorPrivate *curs : qAsConst(cursors))
         curs->aboutToRemoveCell(from, to);
 }
 

src/gui/text/qtextdocumentfragment.cpp

@@ -873,7 +873,7 @@ QTextHtmlImporter::Table QTextHtmlImporter::scanTable(int tableNodeIdx)
     QVector<RowColSpanInfo> rowColSpanForColumn;
 
     int effectiveRow = 0;
-    foreach (int row, rowNodes) {
+    for (int row : qAsConst(rowNodes)) {
         int colsInRow = 0;
 
         foreach (int cell, at(row).children)