/*	Public domain */

#ifndef _AGAR_WIDGET_TREETBL_H_
#define _AGAR_WIDGET_TREETBL_H_

#include <agar/gui/label.h>
#include <agar/gui/scrollbar.h>
#include <agar/gui/begin.h>

struct ag_treetbl;

typedef char *_Nullable (*AG_TreetblDataFn)(struct ag_treetbl *_Nonnull, int,int);
typedef int             (*AG_TreetblSortFn)(struct ag_treetbl *_Nonnull, int,
                                            int, int, int);

enum ag_treetbl_sort_mode {
	AG_TREETBL_SORT_NOT = 0,
	AG_TREETBL_SORT_ASC = 1,
	AG_TREETBL_SORT_DSC = 2
};

typedef struct ag_treetbl_col {
	int cid;				/* Column identifier */
	Uint32 _pad;
	struct ag_treetbl *_Nonnull tbl;	/* Back pointer to Treetbl */

	Uint idx;				/* Index into row->cell[] */
	Uint flags;
#define AG_TREETBL_COL_DYNAMIC		0x01	/* Updates periodically */
#define AG_TREETBL_COL_EXPANDER		0x02	/* Should hold +/- boxes */
#define AG_TREETBL_COL_RESIZABLE	0x04	/* User-resizable */
#define AG_TREETBL_COL_MOVING		0x08	/* Being displaced */
#define AG_TREETBL_COL_FILL		0x20	/* Expand to remaining space */
#define AG_TREETBL_COL_SELECTED		0x40	/* Column is selected */
#define AG_TREETBL_COL_SORTING		0x80	/* Controls sorting */

	char *label;				/* Header text */
	int   labelSu;				/* Cached text surface or -1 */

	int w;					/* Column width */
} AG_TreetblCol;

typedef AG_TAILQ_HEAD(ag_treetbl_rowq, ag_treetbl_row) AG_TreetblRowQ;

typedef struct ag_treetbl_cell {
	char *_Nullable text;		/* Display text */
	int             textSu;		/* Cached surface (or -1) */
	Uint32 _pad;
} AG_TreetblCell;

typedef struct ag_treetbl_row {
	struct ag_treetbl *_Nonnull tbl; /* Back pointer to Treetbl */
	AG_TreetblCell *_Nonnull cell;	 /* Array of cells */

	int rid;			 /* Row identifier */
	Uint flags;
#define AG_TREETBL_ROW_EXPANDED	0x01	/* Tree expanded */
#define AG_TREETBL_ROW_DYNAMIC	0x02	/* Update dynamically */
#define AG_TREETBL_ROW_SELECTED	0x04	/* Row is selected */

	struct ag_treetbl_row *_Nullable parent;
	AG_TreetblRowQ children;
	AG_TAILQ_ENTRY(ag_treetbl_row) siblings;
	AG_TAILQ_ENTRY(ag_treetbl_row) backstore;
} AG_TreetblRow;

typedef struct ag_treetbl {
	struct ag_widget _inherit;	/* AG_Widget -> AG_Treetbl */
	Uint flags;
#define AG_TREETBL_MULTI       0x001	/* Allow multiple selections */
#define AG_TREETBL_MULTITOGGLE 0x002
#define AG_TREETBL_REORDERCOLS 0x004	/* Allow column reordering */
#define AG_TREETBL_NODUPCHECKS 0x008	/* Skip checks for duplicate IDs */
#define AG_TREETBL_SORT        0x010	/* Enable sorting */
#define AG_TREETBL_POLLED      0x020	/* Polling mode */
#define AG_TREETBL_HFILL       0x040
#define AG_TREETBL_VFILL       0x080
#define AG_TREETBL_EXPAND      (AG_TREETBL_HFILL | AG_TREETBL_VFILL)

	AG_Rect r;			/* View area */
	int xOffs;			/* Horizontal display offset */
	int xMax;
	int yOffs;
	int yMax;
	int hCol;			/* Header height */
	int hRow;			/* Per-row height */
	int dblClicked;			/* Used by double click */
	int wHint, hHint;		/* Size hint */
	AG_Timer toDblClick;
	Uint n;					/* Column count */
	enum ag_treetbl_sort_mode sortMode;	/* Sorting mode */
	AG_TreetblCol *_Nullable column;	/* Column array */
	
	AG_TreetblRowQ children;	/* Tree of rows */
	AG_TreetblRowQ backstore;	/* For polling */
	int nExpandedRows;		/* Number of rows visible */
	int lineScrollAmount;		/* Wheel scroll increment */
	AG_Scrollbar *_Nonnull  vBar;	/* Vertical scrollbar */
	AG_Scrollbar *_Nullable hBar;	/* Horizontal scrollbar */
	
	_Nullable AG_TreetblDataFn cellDataFn;	/* Callback to get cell data */
	_Nullable AG_TreetblSortFn sortFn;	/* Compare function */
	
	struct {
		Uint redraw_last;			/* Last drawn */
		Uint redraw_rate;			/* Refresh rate */
		int dirty;				/* Needs update */
		Uint count;				/* Visible rows per view */

		struct ag_treetbl_rowdocket_item {	/* Visible row cache */
			AG_TreetblRow *_Nullable row;
			Uint depth;
			Uint32 _pad;
		} *_Nullable items;
	} visible;
} AG_Treetbl;

#define   AGTREETBL(o)        ((AG_Treetbl *)(o))
#define  AGcTREETBL(o)        ((const AG_Treetbl *)(o))
#define  AG_TREETBL_ISA(o)    (((AGOBJECT(o)->cid & 0xff000000) >> 24) == 0x26)
#define  AG_TREETBL_SELF()    AGTREETBL(  AG_OBJECT(0,        "AG_Widget:AG_Treetbl:*") )
#define  AG_TREETBL_PTR(n)    AGTREETBL(  AG_OBJECT((n),      "AG_Widget:AG_Treetbl:*") )
#define  AG_TREETBL_NAMED(n)  AGTREETBL(  AG_OBJECT_NAMED((n),"AG_Widget:AG_Treetbl:*") )
#define AG_cTREETBL_SELF()   AGcTREETBL( AG_cOBJECT(0,        "AG_Widget:AG_Treetbl:*") )
#define AG_cTREETBL_PTR(n)   AGcTREETBL( AG_cOBJECT((n),      "AG_Widget:AG_Treetbl:*") )
#define AG_cTREETBL_NAMED(n) AGcTREETBL( AG_cOBJECT_NAMED((n),"AG_Widget:AG_Treetbl:*") )

__BEGIN_DECLS
extern AG_WidgetClass agTreetblClass;

AG_Treetbl *_Nonnull AG_TreetblNew(void *_Nullable , Uint,
                                   _Nullable AG_TreetblDataFn,
				   _Nullable AG_TreetblSortFn);

void AG_TreetblSizeHint(AG_Treetbl *_Nonnull, int, int);
void AG_TreetblSetRefreshRate(AG_Treetbl *_Nonnull, Uint);
void AG_TreetblSetColHeight(AG_Treetbl *_Nonnull, int);
void AG_TreetblSetSortCol(AG_Treetbl *_Nonnull, AG_TreetblCol *_Nonnull);
void AG_TreetblSetSortMode(AG_Treetbl *_Nonnull, enum ag_treetbl_sort_mode);
void AG_TreetblSetExpanderCol(AG_Treetbl *_Nonnull, AG_TreetblCol *_Nonnull);

AG_TreetblCol *_Nullable AG_TreetblAddCol(AG_Treetbl *_Nonnull, int,
                                          const char *_Nullable,
					  const char *_Nullable, ...);

void AG_TreetblSelectCol(AG_Treetbl *_Nonnull, AG_TreetblCol *_Nonnull);
int  AG_TreetblSelectColID(AG_Treetbl *_Nonnull, int);
void AG_TreetblDeselectCol(AG_Treetbl *_Nonnull, AG_TreetblCol *_Nonnull);
int  AG_TreetblDeselectColID(AG_Treetbl *_Nonnull, int);

AG_TreetblRow *_Nullable AG_TreetblAddRow(AG_Treetbl *_Nonnull,
                                          AG_TreetblRow *_Nullable, int,
                                          const char *_Nonnull, ...);

void AG_TreetblDelRow(AG_Treetbl *_Nonnull, AG_TreetblRow *_Nonnull);
void AG_TreetblClearRows(AG_Treetbl *_Nonnull);
void AG_TreetblRestoreRows(AG_Treetbl *_Nonnull);
void AG_TreetblBegin(AG_Treetbl *_Nonnull);
void AG_TreetblEnd(AG_Treetbl *_Nonnull);
void AG_TreetblSelectRow(AG_Treetbl *_Nonnull, AG_TreetblRow *_Nonnull);
void AG_TreetblDeselectRow(AG_Treetbl *_Nonnull, AG_TreetblRow *_Nullable);
void AG_TreetblSelectAll(AG_Treetbl *_Nonnull, AG_TreetblRow *_Nullable);

AG_TreetblRow *_Nullable AG_TreetblSelectedRow(AG_Treetbl *_Nonnull)
					      _Pure_Attribute_If_Unthreaded;

void AG_TreetblExpandRow(AG_Treetbl *_Nonnull, AG_TreetblRow *_Nonnull);
void AG_TreetblCollapseRow(AG_Treetbl *_Nonnull, AG_TreetblRow *_Nonnull);

#define	AG_TreetblRowToggle(TV, ROW)				\
	do {							\
		if (NULL == (ROW)) break			\
		if ((ROW)->flags & AG_TREETBL_ROW_EXPANDED)	\
			AG_TreetblCollapseRow(TV, (ROW));	\
		else						\
			AG_TreetblExpandRow(TV, (ROW));		\
	} while (0)

AG_TreetblRow *_Nullable AG_TreetblLookupRowRecurse(AG_TreetblRowQ *_Nonnull,
                                                    int)
                                                   _Pure_Attribute; 
AG_TreetblRow *_Nullable AG_TreetblLookupRow(AG_Treetbl *_Nonnull, int)
                                            _Pure_Attribute_If_Unthreaded;

int AG_TreetblDelRowID(AG_Treetbl *_Nonnull, int);
int AG_TreetblSelectRowID(AG_Treetbl *_Nonnull, int);
int AG_TreetblDeselectRowID(AG_Treetbl *_Nonnull, int);
int AG_TreetblExpandRowID(AG_Treetbl *_Nonnull, int);
int AG_TreetblCollapseRowID(AG_Treetbl *_Nonnull, int);
__END_DECLS

#include <agar/gui/close.h>
#endif /* _AGAR_WIDGET_TREETBL_H_ */