Tracker: Various sorting issues in Tracker

When sorting files by Modified dates, right clicking on a file was leading
to a sorting issue where files were changing positions (without reason).

1. Any changes to stats (size, modification, creation, mode) was triggering
the sorting. Now only stats fields currently used as a Sort criteria will
trigger such event.

2. The Mimeset of file was set (in case of unknown file format) once per checked
add-on when building AddOn Menu. Now it's checked once per file in selection.
(so, once per file, rather then once per file, per add-on).

3. Now rely on registrar to force the mimeset (to trigger the sniffer in case
the attribute already exist) rather than trying to duplicate the feature in Tracker.

4. When Sorting, if there is a old position known, check if it's working by looking
if you should come after the previous item, and before the following item.  Previously,
the item would be pushed at the top if the group of item all fitting the criteria
(same file size, same file kind, etc.. depending on the sorting criteria).

Fixes #8478.

src/kits/tracker/ContainerWindow.cpp

@@ -318,12 +318,7 @@ static void
 AddMimeTypeString(BObjectList<BString> &list, Model *model)
 {
 	BString *mimeType = new BString(model->MimeType());
-	if (!mimeType->Length() || !mimeType->ICompare(B_FILE_MIMETYPE)) {
-		// if model is of unknown type, try mimeseting it first
-		model->Mimeset(true);
-		mimeType->SetTo(model->MimeType());
-	}
-
+	
 	if (mimeType->Length()) {
 		// only add the type if it's not already there
 		for (int32 i = list.CountItems(); i-- > 0;) {
@@ -2975,6 +2970,8 @@ BContainerWindow::BuildAddOnMenu(BMenu *menu)
 			break;
 		delete item;
 	}
+	
+	_UpdateSelectionMIMEInfo();
 
 	BObjectList<BMenuItem> primaryList;
 	BObjectList<BMenuItem> secondaryList;
@@ -3141,6 +3138,29 @@ BContainerWindow::LoadAddOn(BMessage *message)
 }
 
 
+void
+BContainerWindow::_UpdateSelectionMIMEInfo()
+{
+	BPose* pose;
+	int32 index = 0;
+	while ((pose = PoseView()->SelectionList()->ItemAt(index++)) != NULL) {
+		BString mimeType(pose->TargetModel()->MimeType());
+		if (!mimeType.Length() || mimeType.ICompare(B_FILE_MIMETYPE) == 0) {
+			pose->TargetModel()->Mimeset(true);
+			if (pose->TargetModel()->IsSymLink()) {
+				Model* resolved = new Model(pose->TargetModel()->EntryRef(), true, true);
+				if (resolved->InitCheck() == B_OK) {
+					mimeType.SetTo(resolved->MimeType());
+					if (!mimeType.Length() || mimeType.ICompare(B_FILE_MIMETYPE) == 0)
+						resolved->Mimeset(true);
+				}
+				delete resolved;
+			}
+		}
+	}
+}
+
+
 BMenuItem *
 BContainerWindow::NewAttributeMenuItem(const char *label, const char *name,
 	int32 type, float width, int32 align, bool editable, bool statField)

src/kits/tracker/ContainerWindow.h

@@ -303,6 +303,8 @@ class BContainerWindow : public BWindow {
 
 		friend int32 show_context_menu(void*);
 		friend class BackgroundView;
+
+		void _UpdateSelectionMIMEInfo();
 };
 
 class WindowStateNodeOpener {

src/kits/tracker/Model.cpp

@@ -1178,18 +1178,11 @@ bool
 Model::Mimeset(bool force)
 {
 	BString oldType = MimeType();
-	ModelNodeLazyOpener opener(this);
 	BPath path;
 	GetPath(&path);
-	if (force) {
-		if (opener.OpenNode(true) != B_OK)
-			return false;
-
-		Node()->RemoveAttr(kAttrMIMEType);
-		update_mime_info(path.Path(), 0, 1, 1);
-	} else
-		update_mime_info(path.Path(), 0, 1, 0);
 
+	update_mime_info(path.Path(), 0, 1, force ? 2 : 0);
+	
 	AttrChanged(0);
 
 	return !oldType.ICompare(MimeType());

src/kits/tracker/PoseView.cpp

@@ -1674,7 +1674,7 @@ BPoseView::AddPoseToList(PoseList *list, bool visibleList, bool insertionSort,
 	bool needToDraw = true;
 
 	if (insertionSort && list->CountItems()) {
-		int32 orientation = BSearchList(list, pose, &poseIndex);
+		int32 orientation = BSearchList(list, pose, &poseIndex, 0);
 
 		if (orientation == kInsertAfter)
 			poseIndex++;
@@ -5359,6 +5359,12 @@ BPoseView::EntryMoved(const BMessage *message)
 }
 
 
+struct attrColumnRelation {
+	uint32 	attrHash;
+	int32	fieldMask;
+};
+
+
 bool
 BPoseView::AttributeChanged(const BMessage *message)
 {
@@ -5430,7 +5436,6 @@ BPoseView::AttributeChanged(const BMessage *message)
 			return false;
 		}
 
-		uint32 attrHash;
 		if (attrName) {
 			// rebuild the MIME type list, if the MIME type has changed
 			if (strcmp(attrName, kAttrMIMEType) == 0)
@@ -5438,14 +5443,41 @@ BPoseView::AttributeChanged(const BMessage *message)
 
 			// note: the following code is wrong, because this sort of hashing
 			// may overlap and we get aliasing
-			attrHash = AttrHashString(attrName, info.type);
-		}
+			uint32 attrHash = AttrHashString(attrName, info.type);
+			if (attrHash == PrimarySort() || attrHash == SecondarySort()) {
+				_CheckPoseSortOrder(fPoseList, pose, poseListIndex);
+				if (fFiltering && visible)
+					_CheckPoseSortOrder(fFilteredPoseList, pose, index);
+			}
+		} else {
+			int32 fields;
+			if (message->FindInt32("fields", &fields) != B_OK)
+				return true;
 
-		if (!attrName || attrHash == PrimarySort()
-			|| attrHash == SecondarySort()) {
-			_CheckPoseSortOrder(fPoseList, pose, poseListIndex);
-			if (fFiltering && visible)
-				_CheckPoseSortOrder(fFilteredPoseList, pose, index);
+			static struct attrColumnRelation attributs[] = {
+				{ AttrHashString(kAttrStatModified, B_TIME_TYPE),
+					B_STAT_MODIFICATION_TIME },
+				{ AttrHashString(kAttrStatSize, B_OFF_T_TYPE),
+					B_STAT_SIZE },
+				{ AttrHashString(kAttrStatCreated, B_TIME_TYPE),
+					B_STAT_CREATION_TIME },
+				{ AttrHashString(kAttrStatMode, B_STRING_TYPE),
+					B_STAT_MODE }
+			};
+
+			for (int32 i = sizeof(attributs) / sizeof(attrColumnRelation);
+				i--;) {
+				if (attributs[i].attrHash == PrimarySort()
+					|| attributs[i].attrHash == SecondarySort()) {
+
+					if (fields & attributs[i].fieldMask) {
+						_CheckPoseSortOrder(fPoseList, pose, poseListIndex);
+						if (fFiltering && visible)
+							_CheckPoseSortOrder(fFilteredPoseList, pose, index);
+						return true;
+					}
+				}
+			}
 		}
 	} else {
 		// we received an attr changed notification for a zombie model, it means
@@ -8667,7 +8699,7 @@ BPoseView::_CheckPoseSortOrder(PoseList *poseList, BPose *pose, int32 oldIndex)
 	// take pose out of list for BSearch
 	poseList->RemoveItemAt(oldIndex);
 	int32 afterIndex;
-	int32 orientation = BSearchList(poseList, pose, &afterIndex);
+	int32 orientation = BSearchList(poseList, pose, &afterIndex, oldIndex);
 
 	int32 newIndex;
 	if (orientation == kInsertAtFront)
@@ -8777,19 +8809,33 @@ BSearch(PoseList *table, const BPose* key, BPoseView *view,
 
 int32
 BPoseView::BSearchList(PoseList *poseList, const BPose *pose,
-	int32 *resultingIndex)
+	int32 *resultingIndex, int32 oldIndex)
 {
 	// check to see if insertion should be at beginning of list
 	const BPose *firstPose = poseList->FirstItem();
 	if (!firstPose)
-		return kInsertAtFront;
-
-	if (PoseCompareAddWidget(pose, firstPose, this) <= 0) {
+		return kInsertAtFront; 
+	
+	if (PoseCompareAddWidget(pose, firstPose, this) < 0) {
 		*resultingIndex = 0;
 		return kInsertAtFront;
 	}
 
 	int32 count = poseList->CountItems();
+
+	// look if old position is still ok, by comparing to siblings
+	bool valid = oldIndex > 0 && oldIndex < count - 1;
+	valid = valid && PoseCompareAddWidget(pose,
+		poseList->ItemAt(oldIndex - 1), this) >= 0;
+	// the current item is gone, so not oldIndex+1
+	valid = valid && PoseCompareAddWidget(pose,
+		poseList->ItemAt(oldIndex), this) <= 0;
+
+	if (valid) {
+		*resultingIndex = oldIndex - 1;
+		return kInsertAfter;
+	}
+	
 	*resultingIndex = count - 1;
 
 	const BPose *searchResult = BSearch(poseList, pose, this,

src/kits/tracker/PoseView.h

@@ -520,7 +520,8 @@ class BPoseView : public BView {
 		void DrawViewCommon(const BRect &updateRect);
 
 		// pose list handling
-		int32 BSearchList(PoseList *poseList, const BPose *, int32 *index);
+		int32 BSearchList(PoseList *poseList, const BPose *, int32 *index,
+			int32 oldIndex);
 		void InsertPoseAfter(BPose *pose, int32 *index, int32 orientation,
 			BRect *invalidRect);
 			// does a CopyBits to scroll poses making room for a new pose,