Misc.: fix narrowing conversion warnings with explicit cast to int

And using qsizetype in some places.

::pathconf() returns long.

Found by using -Wshorten-64-to-32 clang compiler flag, or adding that
flag to the flags clangd uses.

Change-Id: I9f9abd3d4d6fe73f525eec869ceabc799317f3d6
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
(cherry picked from commit 8d77ee0f2b042af7aec43e1e83eb26d92c2f8234)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/gui/kernel/qplatformdialoghelper.cpp

@@ -905,7 +905,7 @@ const QList<QMessageDialogOptions::CustomButton> &QMessageDialogOptions::customB
 
 const QMessageDialogOptions::CustomButton *QMessageDialogOptions::customButton(int id)
 {
-    int i = d->customButtons.indexOf(CustomButton(id));
+    const int i = int(d->customButtons.indexOf(CustomButton(id)));
     return (i < 0 ? nullptr : &d->customButtons.at(i));
 }
 

src/gui/kernel/qplatformgraphicsbufferhelper.cpp

@@ -179,14 +179,14 @@ bool QPlatformGraphicsBufferHelper::bindSWToTexture(const QPlatformGraphicsBuffe
     QRect rect = subRect;
     if (rect.isNull() || rect == QRect(QPoint(0,0),size)) {
         if (needsRowLength)
-            funcs->glPixelStorei(GL_UNPACK_ROW_LENGTH, image.bytesPerLine() / 4);
+            funcs->glPixelStorei(GL_UNPACK_ROW_LENGTH, GLint(image.bytesPerLine() / 4));
         funcs->glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, size.width(), size.height(), 0, GL_RGBA, pixelType, image.constBits());
         if (needsRowLength)
             funcs->glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
     } else {
         if (!ctx->isOpenGLES() || ctx->format().majorVersion() >= 3) {
             // OpenGL 2.1+ or OpenGL ES/3+
-            funcs->glPixelStorei(GL_UNPACK_ROW_LENGTH, image.bytesPerLine() / 4);
+            funcs->glPixelStorei(GL_UNPACK_ROW_LENGTH, GLint(image.bytesPerLine() / 4));
             funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, rect.x(), rect.y(), rect.width(), rect.height(), GL_RGBA, pixelType,
                                    image.constScanLine(rect.y()) + rect.x() * 4);
             funcs->glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);

src/widgets/dialogs/qfiledialog.cpp

@@ -651,7 +651,7 @@ void QFileDialogPrivate::retranslateStrings()
     if (proxyModel)
         abstractModel = proxyModel;
 #endif
-    int total = qMin(abstractModel->columnCount(QModelIndex()), actions.size() + 1);
+    const int total = qMin(abstractModel->columnCount(QModelIndex()), int(actions.size() + 1));
     for (int i = 1; i < total; ++i) {
         actions.at(i - 1)->setText(QFileDialog::tr("Show ") + abstractModel->headerData(i, Qt::Horizontal, Qt::DisplayRole).toString());
     }
@@ -1770,7 +1770,7 @@ QLineEdit *QFileDialogPrivate::lineEdit() const {
     return (QLineEdit*)qFileDialogUi->fileNameEdit;
 }
 
-int QFileDialogPrivate::maxNameLength(const QString &path)
+long QFileDialogPrivate::maxNameLength(const QString &path)
 {
 #if defined(Q_OS_UNIX)
     return ::pathconf(QFile::encodeName(path).data(), _PC_NAME_MAX);
@@ -2730,7 +2730,7 @@ void QFileDialog::accept()
         }
 
         if (!info.exists()) {
-            int maxNameLength = d->maxNameLength(info.path());
+            const long maxNameLength = d->maxNameLength(info.path());
             if (maxNameLength >= 0 && info.fileName().size() > maxNameLength)
                 return;
         }
@@ -2866,7 +2866,7 @@ bool QFileDialogPrivate::restoreWidgetState(QStringList &history, int splitterPo
     if (proxyModel)
         abstractModel = proxyModel;
 #endif
-    int total = qMin(abstractModel->columnCount(QModelIndex()), actions.size() + 1);
+    const int total = qMin(abstractModel->columnCount(QModelIndex()), int(actions.size() + 1));
     for (int i = 1; i < total; ++i)
         actions.at(i - 1)->setChecked(!headerView->isSectionHidden(i));
 
@@ -3109,7 +3109,8 @@ void QFileDialogPrivate::_q_showHeader(QAction *action)
 {
     Q_Q(QFileDialog);
     QActionGroup *actionGroup = qobject_cast<QActionGroup*>(q->sender());
-    qFileDialogUi->treeView->header()->setSectionHidden(actionGroup->actions().indexOf(action) + 1, !action->isChecked());
+    qFileDialogUi->treeView->header()->setSectionHidden(int(actionGroup->actions().indexOf(action) + 1),
+                                                        !action->isChecked());
 }
 
 #if QT_CONFIG(proxymodel)
@@ -3671,7 +3672,7 @@ void QFileDialogPrivate::_q_updateOkButton()
                 break;
             }
             if (!idx.isValid()) {
-                int maxLength = maxNameLength(fileDir);
+                const long maxLength = maxNameLength(fileDir);
                 enableButton = maxLength < 0 || fileName.size() <= maxLength;
             }
             break;
@@ -3803,7 +3804,7 @@ void QFileDialogPrivate::_q_useNameFilter(int index)
         QString fileName = lineEdit()->text();
         const QString fileNameExtension = QFileInfo(fileName).suffix();
         if (!fileNameExtension.isEmpty() && !newNameFilterExtension.isEmpty()) {
-            const int fileNameExtensionLength = fileNameExtension.size();
+            const qsizetype fileNameExtensionLength = fileNameExtension.size();
             fileName.replace(fileName.size() - fileNameExtensionLength,
                              fileNameExtensionLength, newNameFilterExtension);
             qFileDialogUi->listView->clearSelection();

src/widgets/dialogs/qfiledialog_p.h

@@ -120,11 +120,11 @@ public:
 
     QLineEdit *lineEdit() const;
 
-    static int maxNameLength(const QString &path);
+    static long maxNameLength(const QString &path);
 
     QString basename(const QString &path) const
     {
-        int separator = QDir::toNativeSeparators(path).lastIndexOf(QDir::separator());
+        const qsizetype separator = QDir::toNativeSeparators(path).lastIndexOf(QDir::separator());
         if (separator != -1)
             return path.mid(separator + 1);
         return path;