QFileDialog::HideNameFilterDetails breaks Cocoa QFileDIalog filter

Using namefilters in the non-native file dialog is a bit broken by
design, since it don't store the whole selected name filter, but
only the filter with details stripped off (if this is specified). And
it stores this data in gui widgets. And the native file dialog also
suffers from this. At least this patch will pick the first matching
name filter (with details) given a details-stripped version.

Task-number: QTBUG-12870
Reviewed-by: cduclos
(cherry picked from commit 0e4a9ab0f60faff3bde86cb7f08250161c18103e)

1 files changed, 17 insertions, 8 deletions

diff --git a/src/gui/dialogs/qfiledialog_mac.mm b/src/gui/dialogs/qfiledialog_mac.mm
index 7c0faff..57df2d4 100644
--- a/src/gui/dialogs/qfiledialog_mac.mm
+++ b/src/gui/dialogs/qfiledialog_mac.mm
@@ -119,6 +119,7 @@ QT_USE_NAMESPACE
 - (QString)removeExtensions:(const QString &)filter;
 - (void)createTextField;
 - (void)createPopUpButton:(const QString &)selectedFilter hideDetails:(BOOL)hideDetails;
+- (QStringList)findStrippedFilterWithVisualFilterName:(QString)name;
 - (void)createAccessory;
 
 @end
@@ -127,8 +128,6 @@ QT_USE_NAMESPACE
 
 - (id)initWithAcceptMode:(QT_PREPEND_NAMESPACE(QFileDialog::AcceptMode))acceptMode
     title:(const QString &)title
-    nameFilters:(const QStringList &)nameFilters
-    selectedNameFilter:(const QString &)selectedNameFilter
     hideNameFilterDetails:(bool)hideNameFilterDetails
     qDirFilter:(QT_PREPEND_NAMESPACE(QDir::Filters))qDirFilter
     fileOptions:(QT_PREPEND_NAMESPACE(QFileDialog::Options))fileOptions
@@ -158,8 +157,10 @@ QT_USE_NAMESPACE
     mPriv = priv;
     mLastFilterCheckPath = new QString;
     mQDirFilterEntryList = new QStringList;
-    mNameFilterDropDownList = new QStringList(nameFilters);
-    mSelectedNameFilter = new QStringList(qt_clean_filter_list(selectedNameFilter));
+    mNameFilterDropDownList = new QStringList(priv->nameFilters);
+    QString selectedVisualNameFilter = priv->qFileDialogUi->fileTypeCombo->currentText();
+    mSelectedNameFilter = new QStringList([self findStrippedFilterWithVisualFilterName:selectedVisualNameFilter]);
+
     QFileInfo sel(selectFile);
     if (sel.isDir()){
         mCurrentDir = [qt_mac_QStringToNSString(sel.absoluteFilePath()) retain];
@@ -168,8 +169,9 @@ QT_USE_NAMESPACE
         mCurrentDir = [qt_mac_QStringToNSString(sel.absolutePath()) retain];
         mCurrentSelection = new QString(sel.absoluteFilePath());
     }
+
     [mSavePanel setTitle:qt_mac_QStringToNSString(title)];
-    [self createPopUpButton:selectedNameFilter hideDetails:hideNameFilterDetails];
+    [self createPopUpButton:selectedVisualNameFilter hideDetails:hideNameFilterDetails];
     [self createTextField];
     [self createAccessory];
     [mSavePanel setAccessoryView:mNameFilterDropDownList->size() > 1 ? mAccessoryView : nil];
@@ -346,7 +348,7 @@ QT_USE_NAMESPACE
     // This mDelegate function is called when the _name_ filter changes.
     Q_UNUSED(sender);
     QString selection = mNameFilterDropDownList->value([mPopUpButton indexOfSelectedItem]);
-    *mSelectedNameFilter = QT_PREPEND_NAMESPACE(qt_clean_filter_list)(selection);
+    *mSelectedNameFilter = [self findStrippedFilterWithVisualFilterName:selection];
     [mSavePanel validateVisibleColumns];
     [self updateProperties];
     if (mPriv)
@@ -495,6 +497,15 @@ QT_USE_NAMESPACE
     }
 }
 
+- (QStringList) findStrippedFilterWithVisualFilterName:(QString)name
+{
+    for (int i=0; i<mNameFilterDropDownList->size(); ++i) {
+        if (mNameFilterDropDownList->at(i).startsWith(name))
+            return qt_clean_filter_list(mNameFilterDropDownList->at(i));
+    }
+    return QStringList();
+}
+
 - (void)createAccessory
 {
     NSRect accessoryRect = { { 0.0, 0.0 }, { 450.0, 33.0 } };
@@ -1024,8 +1035,6 @@ void QFileDialogPrivate::createNSOpenSavePanelDelegate()
     QNSOpenSavePanelDelegate *delegate = [[QNSOpenSavePanelDelegate alloc]
         initWithAcceptMode:acceptMode
         title:q->windowTitle()
-        nameFilters:q->nameFilters()
-        selectedNameFilter:q->selectedNameFilter()
         hideNameFilterDetails:q->testOption(QFileDialog::HideNameFilterDetails)
         qDirFilter:model->filter()
         fileOptions:opts