llfolderview.h

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#ifndef LL_LLFOLDERVIEW_H
#define LL_LLFOLDERVIEW_H

#include <vector>
#include <map>
#include <deque>

#include "lluictrl.h"
#include "v4color.h"
#include "lldarray.h"
//#include "llviewermenu.h"
#include "stdenums.h"
#include "llfontgl.h"
#include "lleditmenuhandler.h"
#include "llviewerimage.h"
#include "lldepthstack.h"
#include "lltooldraganddrop.h"

class LLMenuGL;

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLFolderViewEventListener
//
// This is an abstract base class that users of the folderview classes
// would use to catch the useful events emitted from the folder
// views.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


class LLFolderViewItem;
class LLFolderView;
class LLInventoryModel;
class LLScrollableContainerView;
typedef BOOL (*LLFolderSearchFunction)(LLFolderViewItem* first_item, const char *find_text, BOOL backward);

class LLFolderViewEventListener
{
public:
        virtual ~LLFolderViewEventListener( void ) {}
        virtual const LLString& getName() const = 0;
        virtual const LLString& getDisplayName() const = 0;
        virtual const LLUUID& getUUID() const = 0;
        virtual U32 getCreationDate() const = 0;        // UTC seconds
        virtual PermissionMask getPermissionMask() const = 0;
        virtual LLUIImagePtr getIcon() const = 0;
        virtual LLFontGL::StyleFlags getLabelStyle() const = 0;
        virtual LLString getLabelSuffix() const = 0;
        virtual void openItem( void ) = 0;
        virtual void previewItem( void ) = 0;
        virtual void selectItem(void) = 0;
        virtual void showProperties(void) = 0;
        virtual BOOL isItemRenameable() const = 0;
        virtual BOOL renameItem(const LLString& new_name) = 0;
        virtual BOOL isItemMovable( void ) = 0;         // Can be moved to another folder
        virtual BOOL isItemRemovable( void ) = 0;       // Can be destroyed
        virtual BOOL removeItem() = 0;
        virtual void removeBatch(LLDynamicArray<LLFolderViewEventListener*>& batch) = 0;
        virtual void move( LLFolderViewEventListener* parent_listener ) = 0;
        virtual BOOL isItemCopyable() const = 0;
        virtual BOOL copyToClipboard() const = 0;
        virtual void cutToClipboard() = 0;
        virtual BOOL isClipboardPasteable() const = 0;
        virtual void pasteFromClipboard() = 0;
        virtual void buildContextMenu(LLMenuGL& menu, U32 flags) = 0;
        virtual BOOL isUpToDate() const = 0;
        virtual BOOL hasChildren() const = 0;
        virtual LLInventoryType::EType getInventoryType() const = 0;
        virtual void performAction(LLFolderView* folder, LLInventoryModel* model, LLString action) {}

        // This method should be called when a drag begins. returns TRUE
        // if the drag can begin, otherwise FALSE.
        virtual BOOL startDrag(EDragAndDropType* type, LLUUID* id) const = 0;

        // This method will be called to determine if a drop can be
        // performed, and will set drop to TRUE if a drop is
        // requested. Returns TRUE if a drop is possible/happened,
        // otherwise FALSE.
        virtual BOOL dragOrDrop(MASK mask, BOOL drop,
                                                        EDragAndDropType cargo_type,
                                                        void* cargo_data) = 0;

        // This method is called when the object being referenced by the
        // bridge is actually dropped. This allows for cleanup of the old
        // view, reference counting, etc.
//      virtual void dropped() = 0;

        // this method accesses the parent and arranges and sets it as
        // specified.
        void arrangeAndSet(LLFolderViewItem* focus, BOOL set_selection,
                BOOL take_keyboard_focus = TRUE);
};


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLFolderViewListenerFunctor
//
// This simple abstract base class can be used to applied to all
// listeners in a hierarchy.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

class LLFolderViewListenerFunctor
{
public:
        virtual ~LLFolderViewListenerFunctor() {}
        virtual void operator()(LLFolderViewEventListener* listener) = 0;
};

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLFolderViewFunctor
//
// Simple abstract base class for applying a functor to folders and
// items in a folder view hierarchy. This is suboptimal for algorithms
// that only work folders or only work on items, but I'll worry about
// that later when it's determined to be too slow.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

class LLFolderViewItem;
class LLFolderViewFolder;

class LLFolderViewFunctor
{
public:
        virtual ~LLFolderViewFunctor() {}
        virtual void doFolder(LLFolderViewFolder* folder) = 0;
        virtual void doItem(LLFolderViewItem* item) = 0;
};

class LLInventoryFilter
{
public:
        typedef enum e_folder_show
        {
                SHOW_ALL_FOLDERS,
                SHOW_NON_EMPTY_FOLDERS,
                SHOW_NO_FOLDERS
        } EFolderShow;

        typedef enum e_filter_behavior
        {
                FILTER_NONE,                            // nothing to do, already filtered
                FILTER_RESTART,                         // restart filtering from scratch
                FILTER_LESS_RESTRICTIVE,        // existing filtered items will certainly pass this filter
                FILTER_MORE_RESTRICTIVE         // if you didn't pass the previous filter, you definitely won't pass this one
        } EFilterBehavior;

        static const U32 SO_DATE = 1;
        static const U32 SO_FOLDERS_BY_NAME = 2;
        static const U32 SO_SYSTEM_FOLDERS_TO_TOP = 4;

        LLInventoryFilter(const LLString& name);
        virtual ~LLInventoryFilter();

        void setFilterTypes(U32 types);
        U32 getFilterTypes() const { return mFilterOps.mFilterTypes; }
        
        void setFilterSubString(const LLString& string);
        const LLString getFilterSubString(BOOL trim = FALSE);

        void setFilterPermissions(PermissionMask perms);
        PermissionMask getFilterPermissions() const { return mFilterOps.mPermissions; }

        void setDateRange(U32 min_date, U32 max_date);
        void setDateRangeLastLogoff(BOOL sl);
        U32 getMinDate() const { return mFilterOps.mMinDate; }
        U32 getMaxDate() const { return mFilterOps.mMaxDate; }

        void setHoursAgo(U32 hours);
        U32 getHoursAgo() const { return mFilterOps.mHoursAgo; }

        void setShowFolderState( EFolderShow state);
        EFolderShow getShowFolderState() { return mFilterOps.mShowFolderState; }

        void setSortOrder(U32 order);
        U32 getSortOrder() { return mOrder; }

        BOOL check(LLFolderViewItem* item);
        std::string::size_type getStringMatchOffset() const;
        BOOL isActive();
        BOOL isNotDefault();
        BOOL isModified();
        BOOL isModifiedAndClear();
        BOOL isSinceLogoff();
        void clearModified() { mModified = FALSE; mFilterBehavior = FILTER_NONE; }
        const LLString getName() const { return mName; }
        LLString getFilterText();

        void setFilterCount(S32 count) { mFilterCount = count; }
        S32 getFilterCount() { return mFilterCount; }
        void decrementFilterCount() { mFilterCount--; }
        
        void markDefault();
        void resetDefault();

        BOOL isFilterWith(LLInventoryType::EType t);

        S32 getCurrentGeneration() const { return mFilterGeneration; }
        S32 getMinRequiredGeneration() const { return mMinRequiredGeneration; }
        S32 getMustPassGeneration() const { return mMustPassGeneration; }

        //RN: this is public to allow system to externally force a global refilter
        void setModified(EFilterBehavior behavior = FILTER_RESTART);

        void toLLSD(LLSD& data);
        void fromLLSD(LLSD& data);

protected:
        struct filter_ops
        {
                U32                     mFilterTypes;
                U32                     mMinDate;
                U32                     mMaxDate;
                U32                     mHoursAgo;
                EFolderShow     mShowFolderState;
                PermissionMask  mPermissions;
        };
        filter_ops              mFilterOps;
        filter_ops              mDefaultFilterOps;
        std::string::size_type  mSubStringMatchOffset;
        LLString                mFilterSubString;
        U32                             mOrder;
        const LLString  mName;
        S32                             mFilterGeneration;
        S32                             mMustPassGeneration;
        S32                             mMinRequiredGeneration;
        S32                             mFilterCount;
        S32                             mNextFilterGeneration;
        EFilterBehavior mFilterBehavior;

private:
        U32 mLastLogoff;
        BOOL mModified;
        BOOL mNeedTextRebuild;
        LLString mFilterText;
};

// These are grouping of inventory types.
// Order matters when sorting system folders to the top.
enum EInventorySortGroup
{ 
        SG_SYSTEM_FOLDER, 
        SG_TRASH_FOLDER, 
        SG_NORMAL_FOLDER, 
        SG_ITEM 
};

class LLInventorySort
{
public:
        LLInventorySort() 
                : mSortOrder(0),
                  mByDate(false),
                  mSystemToTop(false),
                  mFoldersByName(false) { }
        
        // Returns true if order has changed
        bool updateSort(U32 order);
        U32 getSort() { return mSortOrder; }

        bool operator()(LLFolderViewItem* a, LLFolderViewItem* b);
private:
        U32  mSortOrder;
        bool mByDate;
        bool mSystemToTop;
        bool mFoldersByName;
};

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLFolderViewItem
//
// An instance of this class represents a single item in a folder view
// such as an inventory item or a file.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

class LLFontGL;
class LLFolderViewFolder;
class LLFolderView;

class LLFolderViewItem : public LLUICtrl
{
protected:
        friend class LLFolderViewEventListener;

        static const LLFontGL*          sFont;
        static const LLFontGL*          sSmallFont;
        static LLColor4                         sFgColor;
        static LLColor4                         sHighlightBgColor;
        static LLColor4                         sHighlightFgColor;
        static LLColor4                         sFilterBGColor;
        static LLColor4                         sFilterTextColor;
        static LLColor4                         sSuffixColor;
        static LLColor4                         sSearchStatusColor;

        LLString                                        mLabel;
        LLString                                        mSearchableLabel;
        LLString                                        mType;
        S32                                                     mLabelWidth;
        U32                                                     mCreationDate;
        LLFolderViewFolder*                     mParentFolder;
        LLFolderViewEventListener*      mListener;
        BOOL                                            mIsSelected;
        BOOL                                            mIsCurSelection;
        BOOL                                            mSelectPending;
        LLFontGL::StyleFlags            mLabelStyle;
        LLString                                        mLabelSuffix;
        LLUIImagePtr                            mIcon;
        LLString                                        mStatusText;
        BOOL                                            mHasVisibleChildren;
        S32                                                     mIndentation;
        S32                                                     mNumDescendantsSelected;
        BOOL                                            mFiltered;
        S32                                                     mLastFilterGeneration;
        std::string::size_type          mStringMatchOffset;
        F32                                                     mControlLabelRotation;
        LLFolderView*                           mRoot;
        BOOL                                            mDragAndDropTarget;
        LLUIImagePtr                            mArrowImage;
        LLUIImagePtr                            mBoxImage;
        BOOL                            mIsLoading;
        LLTimer                         mTimeSinceRequestStart;
        
        // This function clears the currently selected item, and records
        // the specified selected item appropriately for display and use
        // in the UI. If open is TRUE, then folders are opened up along
        // the way to the selection.
        void setSelectionFromRoot(LLFolderViewItem* selection, BOOL open,               /* Flawfinder: ignore */
                BOOL take_keyboard_focus = TRUE);

        // helper function to change the selection from the root.
        void changeSelectionFromRoot(LLFolderViewItem* selection, BOOL selected);

        // helper function to change the selection from the root.
        void extendSelectionFromRoot(LLFolderViewItem* selection);

        // this is an internal method used for adding items to folders. A
        // no-op at this leve, but reimplemented in derived classes.
        virtual BOOL addItem(LLFolderViewItem*) { return FALSE; }
        virtual BOOL addFolder(LLFolderViewFolder*) { return FALSE; }

public:
        // This function is called when the folder view is dirty. It's
        // implemented here but called by derived classes when folding the
        // views.
        void arrangeFromRoot();
        void filterFromRoot( void );

        // creation_date is in UTC seconds
        LLFolderViewItem( const LLString& name, LLUIImagePtr icon, S32 creation_date, LLFolderView* root, LLFolderViewEventListener* listener );
        virtual ~LLFolderViewItem( void );

        // addToFolder() returns TRUE if it succeeds. FALSE otherwise
        enum { ARRANGE = TRUE, DO_NOT_ARRANGE = FALSE };
        virtual BOOL addToFolder(LLFolderViewFolder* folder, LLFolderView* root);

        virtual EInventorySortGroup getSortGroup();

        // Finds width and height of this object and it's children.  Also
        // makes sure that this view and it's children are the right size.
        virtual S32 arrange( S32* width, S32* height, S32 filter_generation );
        virtual S32 getItemHeight();

        // applies filters to control visibility of inventory items
        virtual void filter( LLInventoryFilter& filter);

        // updates filter serial number and optionally propagated value up to root
        S32             getLastFilterGeneration() { return mLastFilterGeneration; }

        virtual void    dirtyFilter();

        // If the selection is 'this' then note that otherwise
        // ignore. Returns TRUE if this object was affected. If open is
        // TRUE, then folders are opened up along the way to the
        // selection.
        virtual BOOL setSelection(LLFolderViewItem* selection, BOOL open,               /* Flawfinder: ignore */
                BOOL take_keyboard_focus);

        // This method is used to toggle the selection of an item. If
        // selection is 'this', then note selection, and return TRUE.
        virtual BOOL changeSelection(LLFolderViewItem* selection, BOOL selected);

        // this method is used to group select items
        virtual S32 extendSelection(LLFolderViewItem* selection, LLFolderViewItem* last_selected, LLDynamicArray<LLFolderViewItem*>& items){ return FALSE; }

        // this method is used to group select items
        virtual void recursiveDeselect(BOOL deselect_self);

        // gets multiple-element selection
        virtual BOOL getSelectionList(std::set<LLUUID> &selection){return TRUE;}

        // Returns true is this object and all of its children can be removed (deleted by user)
        virtual BOOL isRemovable();

        // Returns true is this object and all of its children can be moved
        virtual BOOL isMovable();

        // destroys this item recursively
        virtual void destroyView();

        S32 getNumSelectedDescendants() { return mNumDescendantsSelected; }

        BOOL isSelected() { return mIsSelected; }

        void setIsCurSelection(BOOL select) { mIsCurSelection = select; }

        BOOL getIsCurSelection() { return mIsCurSelection; }

        BOOL hasVisibleChildren() { return mHasVisibleChildren; }

        // Call through to the viewed object and return true if it can be
        // removed. Returns true if it's removed.
        //virtual BOOL removeRecursively(BOOL single_item);
        BOOL remove();

        // Build an appropriate context menu for the item.      Flags unused.
        void buildContextMenu(LLMenuGL& menu, U32 flags);

        // This method returns the actual name of the thing being
        // viewed. This method will ask the viewed object itself.
        const LLString& getName( void ) const;

        const LLString& getSearchableLabel( void ) const;

        // This method returns the label displayed on the view. This
        // method was primarily added to allow sorting on the folder
        // contents possible before the entire view has been constructed.
        const char* getLabel() const { return mLabel.c_str(); }

        // Used for sorting, like getLabel() above.
        virtual U32 getCreationDate() const { return mCreationDate; }
        
        LLFolderViewFolder* getParentFolder( void ) { return mParentFolder; }
        const LLFolderViewFolder* getParentFolder( void ) const { return mParentFolder; }
        
        LLFolderViewItem* getNextOpenNode( BOOL include_children = TRUE );
        LLFolderViewItem* getPreviousOpenNode( BOOL include_children = TRUE );

        const LLFolderViewEventListener* getListener( void ) const { return mListener; }
        LLFolderViewEventListener* getListener( void ) { return mListener; }

        // just rename the object.
        void rename(const LLString& new_name);

        // open
        virtual void open( void );              /* Flawfinder: ignore */
        virtual void preview(void);

        // Show children (unfortunate that this is called "open")
        virtual void setOpen(BOOL open = TRUE) {};

        virtual BOOL isOpen() { return FALSE; }

        LLFolderView*   getRoot();
        BOOL                    isDescendantOf( const LLFolderViewFolder* potential_ancestor );
        S32                             getIndentation() { return mIndentation; }

        virtual BOOL    potentiallyVisible(); // do we know for a fact that this item has been filtered out?

        virtual BOOL    getFiltered();
        virtual BOOL    getFiltered(S32 filter_generation);
        virtual void    setFiltered(BOOL filtered, S32 filter_generation);

        // change the icon
        void setIcon(LLUIImagePtr icon);

        // refresh information from the object being viewed.
        virtual void refresh();

        virtual void applyListenerFunctorRecursively(LLFolderViewListenerFunctor& functor);

        // LLView functionality
        virtual BOOL handleRightMouseDown( S32 x, S32 y, MASK mask );
        virtual BOOL handleMouseDown( S32 x, S32 y, MASK mask );
        virtual BOOL handleHover( S32 x, S32 y, MASK mask );
        virtual BOOL handleMouseUp( S32 x, S32 y, MASK mask );
        virtual BOOL handleDoubleClick( S32 x, S32 y, MASK mask );
        virtual BOOL handleScrollWheel(S32 x, S32 y, S32 clicks);

        //      virtual void handleDropped();
        virtual void draw();
        virtual BOOL handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
                                                                   EDragAndDropType cargo_type,
                                                                   void* cargo_data,
                                                                   EAcceptance* accept,
                                                                   LLString& tooltip_msg);
};


// function used for sorting.
typedef bool (*sort_order_f)(LLFolderViewItem* a, LLFolderViewItem* b);


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLFolderViewFolder
//
// An instance of an LLFolderViewFolder represents a collection of
// more folders and items. This is used to build the hierarchy of
// items found in the folder view. :)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

class LLFolderViewFolder : public LLFolderViewItem
{
public:
        typedef enum e_trash
        {
                UNKNOWN, TRASH, NOT_TRASH
        } ETrash;

protected:
        typedef std::vector<LLFolderViewItem*> items_t;
        typedef std::vector<LLFolderViewFolder*> folders_t;
        items_t mItems;
        folders_t mFolders;
        LLInventorySort mSortFunction;

        BOOL            mIsOpen;
        BOOL            mExpanderHighlighted;
        F32                     mCurHeight;
        F32                     mTargetHeight;
        F32                     mAutoOpenCountdown;
        U32                     mSubtreeCreationDate;
        ETrash          mAmTrash;
        S32                     mLastArrangeGeneration;
        S32                     mLastCalculatedWidth;
        S32                     mCompletedFilterGeneration;
        S32                     mMostFilteredDescendantGeneration;
public:
        typedef enum e_recurse_type
        {
                RECURSE_NO,
                RECURSE_UP,
                RECURSE_DOWN,
                RECURSE_UP_DOWN
        } ERecurseType;

        LLFolderViewFolder( const LLString& name, LLUIImagePtr icon,
                                                LLFolderView* root,
                                                LLFolderViewEventListener* listener );
        virtual ~LLFolderViewFolder( void );

        virtual BOOL    potentiallyVisible();

        LLFolderViewItem* getNextFromChild( LLFolderViewItem*, BOOL include_children = TRUE );
        LLFolderViewItem* getPreviousFromChild( LLFolderViewItem*, BOOL include_children = TRUE  );

        // addToFolder() returns TRUE if it succeeds. FALSE otherwise
        virtual BOOL addToFolder(LLFolderViewFolder* folder, LLFolderView* root);

        // Finds width and height of this object and it's children.  Also
        // makes sure that this view and it's children are the right size.
        virtual S32 arrange( S32* width, S32* height, S32 filter_generation );

        BOOL needsArrange();

        // Returns the sort group (system, trash, folder) for this folder.
        virtual EInventorySortGroup getSortGroup();

        virtual void    setCompletedFilterGeneration(S32 generation, BOOL recurse_up);
        virtual S32             getCompletedFilterGeneration() { return mCompletedFilterGeneration; }

        BOOL hasFilteredDescendants(S32 filter_generation) { return mMostFilteredDescendantGeneration >= filter_generation; }
        BOOL hasFilteredDescendants();

        // applies filters to control visibility of inventory items
        virtual void filter( LLInventoryFilter& filter);
        virtual void setFiltered(BOOL filtered, S32 filter_generation);
        virtual void dirtyFilter();

        // Passes selection information on to children and record
        // selection information if necessary. Returns TRUE if this object
        // (or a child) was affected.
        virtual BOOL setSelection(LLFolderViewItem* selection, BOOL open,               /* Flawfinder: ignore */
                BOOL take_keyboard_focus);

        // This method is used to change the selection of an item. If
        // selection is 'this', then note selection as true. Returns TRUE
        // if this or a child is now selected.
        virtual BOOL changeSelection(LLFolderViewItem* selection, BOOL selected);

        // this method is used to group select items
        virtual S32 extendSelection(LLFolderViewItem* selection, LLFolderViewItem* last_selected, LLDynamicArray<LLFolderViewItem*>& items);

        virtual void recursiveDeselect(BOOL deselect_self);

        // Returns true is this object and all of its children can be removed.
        virtual BOOL isRemovable();

        // Returns true is this object and all of its children can be moved
        virtual BOOL isMovable();

        // destroys this folder, and all children
        virtual void destroyView();

        // If this folder can be removed, remove all children that can be
        // removed, return TRUE if this is empty after the operation and
        // it's viewed folder object can be removed.
        //virtual BOOL removeRecursively(BOOL single_item);
        //virtual BOOL remove();

        // remove the specified item (and any children) if
        // possible. Return TRUE if the item was deleted.
        BOOL removeItem(LLFolderViewItem* item);

        // simply remove the view (and any children) Don't bother telling
        // the listeners.
        void removeView(LLFolderViewItem* item);

        // extractItem() removes the specified item from the folder, but
        // doesn't delete it.
        void extractItem( LLFolderViewItem* item );

        // This function is called by a child that needs to be resorted.
        void resort(LLFolderViewItem* item);

        void setItemSortOrder(U32 ordering);
        void sortBy(U32);
        //BOOL (*func)(LLFolderViewItem* a, LLFolderViewItem* b));

        void setAutoOpenCountdown(F32 countdown) { mAutoOpenCountdown = countdown; }

        // folders can be opened. This will usually be called by internal
        // methods.
        virtual void toggleOpen();

        // Force a folder open or closed
        virtual void setOpen(BOOL open = TRUE);         /* Flawfinder: ignore */

        // Called when a child is refreshed.
        // don't rearrange child folder contents unless explicitly requested
        virtual void requestArrange(BOOL include_descendants = FALSE);

        // internal method which doesn't update the entire view. This
        // method was written because the list iterators destroy the state
        // of other iterations, thus, we can't arrange while iterating
        // through the children (such as when setting which is selected.
        virtual void setOpenArrangeRecursively(BOOL open, ERecurseType recurse = RECURSE_NO);           /* Flawfinder: ignore */

        // Get the current state of the folder.
        virtual BOOL isOpen() { return mIsOpen; }

        // special case if an object is dropped on the child.
        BOOL handleDragAndDropFromChild(MASK mask,
                                                                        BOOL drop,
                                                                        EDragAndDropType cargo_type,
                                                                        void* cargo_data,
                                                                        EAcceptance* accept,
                                                                        LLString& tooltip_msg);

        void applyFunctorRecursively(LLFolderViewFunctor& functor);
        virtual void applyListenerFunctorRecursively(LLFolderViewListenerFunctor& functor);

        virtual void open( void );              /* Flawfinder: ignore */
        virtual BOOL addItem(LLFolderViewItem* item); 
        virtual BOOL addFolder( LLFolderViewFolder* folder);

        // LLView functionality
        virtual BOOL handleHover(S32 x, S32 y, MASK mask);
        virtual BOOL handleRightMouseDown( S32 x, S32 y, MASK mask );
        virtual BOOL handleMouseDown( S32 x, S32 y, MASK mask );
        virtual BOOL handleDoubleClick( S32 x, S32 y, MASK mask );
        virtual BOOL handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
                                                                   EDragAndDropType cargo_type,
                                                                   void* cargo_data,
                                                                   EAcceptance* accept,
                                                                   LLString& tooltip_msg);
        virtual void draw();

        U32 getCreationDate() const;
        bool isTrash();
};


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLFolderView
//
// Th LLFolderView represents the root level folder view object. It
// manages the screen region of the folder view.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

class LLUICtrl;
class LLLineEditor;

class LLFolderView : public LLFolderViewFolder, LLEditMenuHandler
{
public:
        typedef void (*SelectCallback)(const std::deque<LLFolderViewItem*> &items, BOOL user_action, void* data);

        static F32 sAutoOpenTime;

        LLFolderView( const LLString& name, LLUIImagePtr root_folder_icon, const LLRect& rect, 
                                        const LLUUID& source_id, LLView *parent_view );
        virtual ~LLFolderView( void );

        virtual BOOL canFocusChildren() const;

        // FolderViews default to sort by name.  This will change that,
        // and resort the items if necessary.
        void setSortOrder(U32 order);
        void checkTreeResortForModelChanged();
        void setFilterPermMask(PermissionMask filter_perm_mask) { mFilter.setFilterPermissions(filter_perm_mask); }
        void setSelectCallback(SelectCallback callback, void* user_data) { mSelectCallback = callback, mUserData = user_data; }
        void setAllowMultiSelect(BOOL allow) { mAllowMultiSelect = allow; }

        LLInventoryFilter* getFilter() { return &mFilter; }
        const LLString getFilterSubString(BOOL trim = FALSE);
        U32 getFilterTypes() const { return mFilter.getFilterTypes(); }
        PermissionMask getFilterPermissions() const { return mFilter.getFilterPermissions(); }
        LLInventoryFilter::EFolderShow getShowFolderState() { return mFilter.getShowFolderState(); }
        U32 getSortOrder() const;
        BOOL isFilterModified() { return mFilter.isNotDefault(); }
        BOOL getAllowMultiSelect() { return mAllowMultiSelect; }

        // Close all folders in the view
        void closeAllFolders();
        void openFolder(const LLString& foldername);

        virtual void toggleOpen() {};
        virtual void setOpenArrangeRecursively(BOOL open, ERecurseType recurse);                /* Flawfinder: ignore */
        virtual BOOL addFolder( LLFolderViewFolder* folder);

        // Finds width and height of this object and it's children.  Also
        // makes sure that this view and it's children are the right size.
        virtual S32 arrange( S32* width, S32* height, S32 filter_generation );

        void arrangeAll() { mArrangeGeneration++; }
        S32 getArrangeGeneration() { return mArrangeGeneration; }

        // applies filters to control visibility of inventory items
        virtual void filter( LLInventoryFilter& filter);

        // get the last selected item
        virtual LLFolderViewItem* getCurSelectedItem( void );

        // Record the selected item and pass it down the hierachy.
        virtual BOOL setSelection(LLFolderViewItem* selection, BOOL open,               /* Flawfinder: ignore */
                BOOL take_keyboard_focus);

        // This method is used to toggle the selection of an item. Walks
        // children, and keeps track of selected objects.
        virtual BOOL changeSelection(LLFolderViewItem* selection, BOOL selected);

        virtual S32 extendSelection(LLFolderViewItem* selection, LLFolderViewItem* last_selected, LLDynamicArray<LLFolderViewItem*>& items);

        virtual BOOL getSelectionList(std::set<LLUUID> &selection);

        // make sure if ancestor is selected, descendents are not
        void sanitizeSelection();
        void clearSelection();
        void addToSelectionList(LLFolderViewItem* item);
        void removeFromSelectionList(LLFolderViewItem* item);

        BOOL startDrag(LLToolDragAndDrop::ESource source);
        void setDragAndDropThisFrame() { mDragAndDropThisFrame = TRUE; }

        // deletion functionality
        void removeSelectedItems();

        // open the selected item.
        void openSelectedItems( void );
        void propertiesSelectedItems( void );

        void autoOpenItem(LLFolderViewFolder* item);
        void closeAutoOpenedFolders();
        BOOL autoOpenTest(LLFolderViewFolder* item);

        // copy & paste
        virtual void    copy();
        virtual BOOL    canCopy() const;

        virtual void    cut();
        virtual BOOL    canCut() const;

        virtual void    paste();
        virtual BOOL    canPaste() const;

        virtual void    doDelete();
        virtual BOOL    canDoDelete() const;

        // public rename functionality - can only start the process
        void startRenamingSelectedItem( void );

        // These functions were used when there was only one folderview,
        // and relied on that concept. This functionality is now handled
        // by the listeners and the lldraganddroptool.
        //LLFolderViewItem*     getMovingItem() { return mMovingItem; }
        //void setMovingItem( LLFolderViewItem* item ) { mMovingItem = item; }
        //void                          dragItemIntoFolder( LLFolderViewItem* moving_item, LLFolderViewFolder* dst_folder, BOOL drop, BOOL* accept );
        //void                          dragFolderIntoFolder( LLFolderViewFolder* moving_folder, LLFolderViewFolder* dst_folder, BOOL drop, BOOL* accept );

        // LLUICtrl Functionality
        /*virtual*/ void setFocus(BOOL focus);

        // LLView functionality
        /*virtual*/ BOOL handleKeyHere( KEY key, MASK mask );
        /*virtual*/ BOOL handleUnicodeCharHere(llwchar uni_char);
        /*virtual*/ BOOL handleMouseDown( S32 x, S32 y, MASK mask );
        /*virtual*/ BOOL handleDoubleClick( S32 x, S32 y, MASK mask );
        /*virtual*/ BOOL handleRightMouseDown( S32 x, S32 y, MASK mask );
        /*virtual*/ BOOL handleHover( S32 x, S32 y, MASK mask );
        /*virtual*/ BOOL handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
                                                                   EDragAndDropType cargo_type,
                                                                   void* cargo_data,
                                                                   EAcceptance* accept,
                                                                   LLString& tooltip_msg);
        /*virtual*/ void reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);
        /*virtual*/ void onFocusLost();
        virtual BOOL handleScrollWheel(S32 x, S32 y, S32 clicks);
        virtual void draw();
        virtual void deleteAllChildren();

        void scrollToShowSelection();
        void scrollToShowItem(LLFolderViewItem* item);
        void setScrollContainer( LLScrollableContainerView* parent ) { mScrollContainer = parent; }
        LLRect getVisibleRect();

        BOOL search(LLFolderViewItem* first_item, const LLString &search_string, BOOL backward);
        void setShowSelectionContext(BOOL show) { mShowSelectionContext = show; }
        BOOL getShowSelectionContext();
        void setShowSingleSelection(BOOL show);
        BOOL getShowSingleSelection() { return mShowSingleSelection; }
        F32  getSelectionFadeElapsedTime() { return mMultiSelectionFadeTimer.getElapsedTimeF32(); }

        void addItemID(const LLUUID& id, LLFolderViewItem* itemp);
        void removeItemID(const LLUUID& id);
        LLFolderViewItem* getItemByID(const LLUUID& id);

        void    doIdle();                                               // Real idle routine
        static void idle(void* user_data);              // static glue to doIdle()

        BOOL needsAutoSelect() { return mNeedsAutoSelect && !mAutoSelectOverride; }
        BOOL needsAutoRename() { return mNeedsAutoRename; }
        void setNeedsAutoRename(BOOL val) { mNeedsAutoRename = val; }

        BOOL getDebugFilters() { return mDebugFilters; }

        // DEBUG only
        void dumpSelectionInformation();

protected:
        LLScrollableContainerView* mScrollContainer;  // NULL if this is not a child of a scroll container.

        static void commitRename( LLUICtrl* renamer, void* user_data );
        static void onRenamerLost( LLUICtrl* renamer, void* user_data);

        void finishRenamingItem( void );
        void revertRenamingItem( void );

protected:
        LLHandle<LLView>                                        mPopupMenuHandle;
        
        typedef std::deque<LLFolderViewItem*> selected_items_t;
        selected_items_t                                mSelectedItems;
        BOOL                                                    mKeyboardSelection;
        BOOL                                                    mAllowMultiSelect;
        BOOL                                                    mShowFolderHierarchy;
        LLUUID                                                  mSourceID;

        // Renaming variables and methods
        LLFolderViewItem*                               mRenameItem;  // The item currently being renamed
        LLLineEditor*                                   mRenamer;

        BOOL                                                    mNeedsScroll;
        LLFolderViewItem*                               mLastScrollItem;
        LLCoordGL                                               mLastScrollOffset;
        BOOL                                                    mNeedsAutoSelect;
        BOOL                                                    mAutoSelectOverride;
        BOOL                                                    mNeedsAutoRename;
        
        BOOL                                                    mDebugFilters;
        U32                                                             mSortOrder;
        LLDepthStack<LLFolderViewFolder>        mAutoOpenItems;
        LLFolderViewFolder*                             mAutoOpenCandidate;
        LLFrameTimer                                    mAutoOpenTimer;
        LLFrameTimer                                    mSearchTimer;
        LLString                                                mSearchString;
        LLInventoryFilter                               mFilter;
        BOOL                                                    mShowSelectionContext;
        BOOL                                                    mShowSingleSelection;
        LLFrameTimer                                    mMultiSelectionFadeTimer;
        S32                                                             mArrangeGeneration;

        void*                                                   mUserData;
        SelectCallback                                  mSelectCallback;
        S32                                                             mSignalSelectCallback;
        S32                                                             mMinWidth;
        std::map<LLUUID, LLFolderViewItem*> mItemMap;
        BOOL                                                    mDragAndDropThisFrame;

};

bool sort_item_name(LLFolderViewItem* a, LLFolderViewItem* b);
bool sort_item_date(LLFolderViewItem* a, LLFolderViewItem* b);

// Flags for buildContextMenu()
const U32 SUPPRESS_OPEN_ITEM = 0x1;
const U32 FIRST_SELECTED_ITEM = 0x2;

#endif // LL_LLFOLDERVIEW_H

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