Add NIF previewer plugin with Linux-specific fixes

Vendored from github.com/Parapets/mo2-preview_nif and adapted for Linux:

- BSA texture resolution via MO2 virtual tree with case-insensitive
  fallback walk (Linux FS is case-sensitive; NIFs reference textures
  with arbitrary case against files on disk)
- Process-wide cached BSA candidate list, keyed by profile path,
  priority-sorted, filtering disabled mods
- Path backslash normalization before loose-file lookup
- Polygon offset on SLSF1_Decal-flagged shapes to break z-ties with
  coincident base meshes (road decals, moss overlays)
- Opaque framebuffer via glColorMask alpha lock so alpha-blended shapes
  can't bleed the dialog background through the preview area
- QMouseEvent::globalPosition().toPoint() for Qt6 compatibility

Preview dialog behavior (organizercore.cpp):
- Switch previewFile and previewFileWithAlternatives from stack-allocated
  exec() to heap + ApplicationModal + show() + WA_DeleteOnClose.
- Parent passed as nullptr so preview lifetime is decoupled from the
  stack-allocated ModInfoDialog that spawns it. Nested exec() inside
  the enclosing dialog's exec() was softlocking on close.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

1 files changed, 61 insertions, 10 deletions

diff --git a/src/src/organizercore.cpp b/src/src/organizercore.cpp
index 0e1219d..810e4c2 100644
--- a/src/src/organizercore.cpp
+++ b/src/src/organizercore.cpp
@@ -54,6 +54,7 @@
 #include <QNetworkInterface>

 #include <QProcess>

 #include <QRegularExpression>

+#include <QTemporaryFile>

 #include <QTextStream>

 #include <QTimer>

 #include <QUrl>

@@ -1307,8 +1308,13 @@ bool OrganizerCore::previewFileWithAlternatives(QWidget* parent, QString fileNam
     return false;

   }

 

-  // set up preview dialog

-  PreviewDialog preview(fileName, parent);

+  // Standalone top-level window (no QObject parent) to decouple from the

+  // enclosing ModInfoDialog stack frame. ApplicationModal stacks it on

+  // top of any already-open modal dialog. WA_DeleteOnClose cleans up.

+  auto* preview = new PreviewDialog(fileName, nullptr);

+  preview->setAttribute(Qt::WA_DeleteOnClose);

+  preview->setWindowModality(Qt::ApplicationModal);

+  (void)parent;

 

   auto addFunc = [&](int originId, std::wstring archiveName = L"") {

     FilesOrigin& origin = directoryStructure()->getOriginByID(originId);

@@ -1321,7 +1327,7 @@ bool OrganizerCore::previewFileWithAlternatives(QWidget* parent, QString fileNam
       if (wid == nullptr) {

         reportError(tr("failed to generate preview for %1").arg(filePath));

       } else {

-        preview.addVariant(ToQString(origin.getName()), wid);

+        preview->addVariant(ToQString(origin.getName()), wid);

       }

     } else if (archiveName != L"") {

       auto archiveFile = directoryStructure()->searchFile(archiveName);

@@ -1337,7 +1343,7 @@ bool OrganizerCore::previewFileWithAlternatives(QWidget* parent, QString fileNam
           if (wid == nullptr) {

             reportError(tr("failed to generate preview for %1").arg(filePath));

           } else {

-            preview.addVariant(ToQString(origin.getName()), wid);

+            preview->addVariant(ToQString(origin.getName()), wid);

           }

         } catch (std::exception& e) {

         }

@@ -1382,10 +1388,13 @@ bool OrganizerCore::previewFileWithAlternatives(QWidget* parent, QString fileNam
     }

   }

 

-  if (preview.numVariants() > 0) {

-    preview.exec();

+  if (preview->numVariants() > 0) {

+    preview->show();

+    preview->raise();

+    preview->activateWindow();

     return true;

   } else {

+    delete preview;

     QMessageBox::information(parent, tr("Sorry"),

                              tr("Sorry, can't preview anything. This function "

                                 "currently does not support extracting from bsas."));

@@ -1402,17 +1411,59 @@ bool OrganizerCore::previewFile(QWidget* parent, const QString& originName,
     return false;

   }

 

-  PreviewDialog preview(path, parent);

-

   QWidget* wid = m_PluginContainer->previewGenerator().genPreview(path);

   if (wid == nullptr) {

     reportError(tr("Failed to generate preview for %1").arg(path));

     return false;

   }

 

-  preview.addVariant(originName, wid);

-  preview.exec();

+  // Standalone top-level window — no QObject parent so lifetime is

+  // decoupled from the enclosing ModInfoDialog (which is stack-allocated

+  // in modlistviewactions.cpp, so passing &dialog as parent makes preview

+  // a child of a stack object). ApplicationModal makes preview stack on

+  // top of the outer modal ModInfoDialog — newest modal wins. Without

+  // modality, ModInfoDialog blocks all input on the preview.

+  // WA_DeleteOnClose handles cleanup when user closes it.

+  auto* preview = new PreviewDialog(path, nullptr);

+  preview->setAttribute(Qt::WA_DeleteOnClose);

+  preview->setWindowModality(Qt::ApplicationModal);

+  preview->addVariant(originName, wid);

+  preview->show();

+  preview->raise();

+  preview->activateWindow();

+  (void)parent;

+

+  return true;

+}

+

+bool OrganizerCore::previewFileData(QWidget* parent, const QString& fileName,

+                                    const QByteArray& fileData)

+{

+  if (fileData.isEmpty()) {

+    return false;

+  }

+

+  const QString ext = QFileInfo(fileName).suffix().toLower();

+  if (!m_PluginContainer->previewGenerator().previewSupported(ext, true)) {

+    return false;

+  }

+

+  QWidget* wid =

+      m_PluginContainer->previewGenerator().genArchivePreview(fileData, fileName);

+  if (wid == nullptr) {

+    return false;

+  }

 

+  // Use QDialog::open() instead of exec(). open() is async window-modal —

+  // it shows the dialog modal to its parent but returns immediately without

+  // starting a nested QEventLoop. Nesting exec() inside a caller that's

+  // itself running in QDialog::exec() (mod info filetree → preview_bsa file

+  // tree → nif preview) has been causing event-loop unwinding to softlock

+  // on close. WA_DeleteOnClose cleans up automatically.

+  auto* preview = new PreviewDialog(fileName, parent);

+  preview->setAttribute(Qt::WA_DeleteOnClose);

+  preview->addVariant(QFileInfo(fileName).fileName(), wid);

+  preview->open();

   return true;

 }