Introduce Scene Explorer feature

indra/llui/llsliderctrl.cpp

@@ -302,7 +302,16 @@ void LLSliderCtrl::updateSliderRect()
     }
     if (mTextBox)
     {
-        right -= mTextBox->getRect().getWidth() + sliderctrl_spacing;
+        // Keep the value text pinned to the right edge, the same way the
+        // editable variant above is; without this a resized slider leaves
+        // the text floating at its construction-time offset mid-track.
+        LLRect text_rect = mTextBox->getRect();
+        const S32 text_width = text_rect.getWidth();
+        text_rect.mRight = right;
+        text_rect.mLeft = right - text_width;
+        mTextBox->setRect(text_rect);
+
+        right -= text_width + sliderctrl_spacing;
     }
     if (mLabelBox)
     {

indra/newview/CMakeLists.txt

@@ -170,9 +170,13 @@ set(viewer_SOURCE_FILES
     alfloaterprofilelegacy.cpp
     alfloaterprogressview.cpp
     alfloaterregiontracker.cpp
+    alfloatersceneexplorer.cpp
+    alfloatersceneexplorerfilters.cpp
     alfloatertransactionlog.cpp
+    alsceneexplorerpredicate.cpp
     alfloaterwebprofile.cpp
     allegacynotificationwellwindow.cpp
+    alobjectproperties.cpp
     alpanelaomini.cpp
     alpanelaopulldown.cpp
     alpanelavatarlegacy.cpp
@@ -195,6 +199,7 @@ set(viewer_SOURCE_FILES
     alpanelsearchweb.cpp
     alpanelstreaminfo.cpp
     alpickitem.cpp
+    alsceneexplorermodel.cpp
     alstreaminfo.cpp
     altoolalign.cpp
     alunzip.cpp
@@ -932,9 +937,13 @@ set(viewer_HEADER_FILES
     alfloaterprofilelegacy.h
     alfloaterprogressview.h
     alfloaterregiontracker.h
+    alfloatersceneexplorer.h
+    alfloatersceneexplorerfilters.h
     alfloatertransactionlog.h
+    alsceneexplorerpredicate.h
     alfloaterwebprofile.h
     allegacynotificationwellwindow.h
+    alobjectproperties.h
     alpanelaomini.h
     alpanelaopulldown.h
     alpanelavatarlegacy.h
@@ -957,6 +966,7 @@ set(viewer_HEADER_FILES
     alpanelsearchweb.h
     alpanelstreaminfo.h
     alpickitem.h
+    alsceneexplorermodel.h
     alstreaminfo.h
     altoolalign.h
     alunzip.h
@@ -2351,6 +2361,7 @@ if (BUILD_TESTING)
   # This creates a separate test project per file listed.
 
   SET(viewer_TEST_SOURCE_FILES
+    alsceneexplorerpredicate.cpp
     llagentaccess.cpp
     lldateutil.cpp
 #    llmediadataclient.cpp

indra/newview/alderenderlist.h

@@ -151,6 +151,7 @@ class ALDerenderList : public LLSingleton<ALDerenderList>
     using entry_list_t = std::list<std::unique_ptr<ALDerenderEntry>>;
 
     const entry_list_t& getEntries() const { return m_Entries; }
+    bool                isDerendered(const LLUUID& idObject) { return getObjectEntry(idObject) != nullptr; }
     void removeObject(ALDerenderEntry::EEntryType eType, const LLUUID& idObject);
     void removeObjects(ALDerenderEntry::EEntryType eType, const uuid_vec_t& idsObject);
 protected:
@@ -170,7 +171,6 @@ class ALDerenderList : public LLSingleton<ALDerenderList>
 protected:
     ALDerenderObject* getObjectEntry(const LLUUID& idObject) /*const*/;
     ALDerenderObject* getObjectEntry(U64 idRegion, const LLUUID& idObject, U32 idRootLocal) /*const*/;
-    bool              isDerendered(const LLUUID& idObject) /*const*/                                { return getObjectEntry(idObject) != nullptr; }
     bool              isDerendered(U64 idRegion, const LLUUID& idObject, U32 idRootLocal) /*const*/ { return getObjectEntry(idRegion, idObject, idRootLocal) != nullptr; }
 
     /*