/*
    DeaDBeeF - The Ultimate Music Player
    Copyright (C) 2009-2013 Alexey Yakovenko <waker@users.sourceforge.net>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __DDBLISTVIEW_H
#define __DDBLISTVIEW_H

#include <gtk/gtk.h>
#include <sys/time.h>
#include <stdint.h>
#include "drawing.h"

// drag and drop targets
enum {
    TARGET_URILIST,
    TARGET_SAMEWIDGET,
};

G_BEGIN_DECLS

#define DDB_TYPE_LISTVIEW (ddb_listview_get_type ())
#define DDB_LISTVIEW(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), DDB_TYPE_LISTVIEW, DdbListview))
#define DDB_LISTVIEW_CLASS(obj) (G_TYPE_CHECK_CLASS_CAST((obj), DDB_TYPE_LISTVIEW, DdbListviewClass))
#define DDB_IS_LISTVIEW(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), DDB_TYPE_LISTVIEW))
#define DDB_IS_LISTVIEW_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((obj), DDB_TYPE_LISTVIEW))
#define DDB_LISTVIEW_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), DDB_TYPE_LISTVIEW, DdbListviewClass))

typedef struct {
    int id;
    char *format;
} col_info_t;

typedef struct _DdbListview DdbListview;
typedef struct _DdbListviewClass DdbListviewClass;

typedef void * DdbListviewIter;
typedef void * DdbPlaylistHandle;

struct _DdbListviewGroup {
    DdbListviewIter head;
    int32_t height;
    int32_t min_height;
    int32_t num_items;
    int pinned;
    struct _DdbListviewGroup *next;
};

typedef struct _DdbListviewGroup DdbListviewGroup;
//typedef void * DdbListviewColIter;

typedef struct {
    // rows
    int (*count) (void);
    int (*sel_count) (void);

    int (*cursor) (void);
    void (*set_cursor) (int cursor);

    DdbListviewIter (*head) (void);
    DdbListviewIter (*tail) (void);
    DdbListviewIter (*next) (DdbListviewIter);
    DdbListviewIter (*prev) (DdbListviewIter);

    DdbListviewIter (*get_for_idx) (int idx);
    int (*get_idx) (DdbListviewIter);

    void (*ref) (DdbListviewIter);
    void (*unref) (DdbListviewIter);

    void (*select) (DdbListviewIter, int sel);
    int (*is_selected) (DdbListviewIter);

    int (*get_group) (DdbListviewIter it, char *str, int size);

    // drag-n-drop
    void (*drag_n_drop) (DdbListviewIter before, DdbPlaylistHandle playlist_from, uint32_t *indices, int length, int copy);
    void (*external_drag_n_drop) (DdbListviewIter before, char *mem, int length);

    // callbacks
    void (*draw_group_title) (DdbListview *listview, cairo_t *drawable, DdbListviewIter iter, int x, int y, int width, int height);
    void (*draw_column_data) (DdbListview *listview, cairo_t *drawable, DdbListviewIter iter, DdbListviewIter group_iter, int column, int group_y, int group_height, int group_pinned, int grp_next_y, int x, int y, int width, int height);
    void (*list_context_menu) (DdbListview *listview, DdbListviewIter iter, int idx);
    void (*header_context_menu) (DdbListview *listview, int col);
    void (*handle_doubleclick) (DdbListview *listview, DdbListviewIter iter, int idx);
    void (*selection_changed) (DdbListview *listview, DdbListviewIter it, int idx);
    void (*delete_selected) (void);
    void (*columns_changed) (DdbListview *listview);
    void (*column_size_changed) (DdbListview *listview, int col);
    void (*col_sort) (int col, int sort_order, void *user_data);
    void (*col_free_user_data) (void *user_data);
    void (*vscroll_changed) (int pos);
    void (*cursor_changed) (int pos);
    int (*modification_idx) (void);
} DdbListviewBinding;

struct _DdbListviewColumn;
struct _DdbListviewGroup;

struct _DdbListview {
    GtkTable parent;

    // interaction with client
    DdbListviewBinding *binding;

    // cached gtk/gdk object pointers
    GtkWidget *list;
    GtkWidget *header;
    GtkWidget *scrollbar;
    GtkWidget *hscrollbar;

    int totalwidth; // width of listview, including invisible (scrollable) part
    const char *title; // unique id, used for config writing, etc
    int lastpos[2]; // last mouse position (for list widget)
    // current state
    int scrollpos;
    int hscrollpos;
    int rowheight;

    int col_movepos;

    int drag_motion_y;

    int ref_point; // idx of anchor when columns are resized
    int ref_point_offset; // y pixel-coordinate of anchor relative to view

    // scrolling
    int scroll_mode; // 0=select, 1=dragndrop
    int scroll_pointer_y;
    float scroll_direction;
    int scroll_active;
    struct timeval tm_prevscroll;
    float scroll_sleep_time;

    // selection
    int areaselect; // boolean, whether area selection is active (1), or not (0)
    int areaselect_y; // pixel-coordinate of anchor click relative to playlist origin
    int dragwait;
    int drag_source_playlist;
    int shift_sel_anchor;

    // header
    int header_dragging;
    int header_sizing;
    int header_dragpt[2];
    float last_header_motion_ev; //is it subject to remove?
    int prev_header_x;
    int header_prepare;
    int header_width; // previous width before resize
    int col_autoresize;

    struct _DdbListviewColumn *columns;
    gboolean lock_columns;

    struct _DdbListviewGroup *groups;
    int groups_build_idx; // must be the same as playlist modification idx
    int fullheight;
    int block_redraw_on_scroll;
    int grouptitle_height;
    int calculated_grouptitle_height;

    // previous area selection range
    int area_selection_start;
    int area_selection_end;

    GdkCursor *cursor_sz;
    GdkCursor *cursor_drag;

    // drawing contexts
    drawctx_t listctx;
    drawctx_t hdrctx;

    // cover art size
    int cover_size;
    int new_cover_size;
    guint cover_refresh_timeout_id;
};

struct _DdbListviewClass {
  GtkTableClass parent_class;
};

GType ddb_listview_get_type(void);

GtkWidget * ddb_listview_new();

void
ddb_listview_set_binding (DdbListview *listview, DdbListviewBinding *binding);
void
ddb_listview_draw_row (DdbListview *listview, int idx, DdbListviewIter iter);
int
ddb_listview_get_vscroll_pos (DdbListview *listview);
int
ddb_listview_get_hscroll_pos (DdbListview *listview);
DdbListviewIter
ddb_listview_get_iter_from_coord (DdbListview *listview, int x, int y);
int
ddb_listview_handle_keypress (DdbListview *ps, int keyval, int state);
void
ddb_listview_set_cursor (DdbListview *pl, int cursor);
void
ddb_listview_set_cursor_noscroll (DdbListview *pl, int cursor);
void
ddb_listview_scroll_to (DdbListview *listview, int rowpos);
void
ddb_listview_set_vscroll (DdbListview *listview, int scroll);
int
ddb_listview_is_scrolling (DdbListview *listview);
int
ddb_listview_column_get_count (DdbListview *listview);
void
ddb_listview_column_append (DdbListview *listview, const char *title, int width, int align_right, int minheight, void *user_data);
void
ddb_listview_column_insert (DdbListview *listview, int before, const char *title, int width, int align_right, int minheight, void *user_data);
void
ddb_listview_column_remove (DdbListview *listview, int idx);
int
ddb_listview_column_get_info (DdbListview *listview, int col, const char **title, int *width, int *align_right, int *minheight, void **user_data);
int
ddb_listview_column_set_info (DdbListview *listview, int col, const char *title, int width, int align_right, int minheight, void *user_data);

void
ddb_listview_show_header (DdbListview *listview, int show);

enum {
    DDB_REFRESH_COLUMNS = 1,
    DDB_REFRESH_HSCROLL = 2,
    DDB_REFRESH_VSCROLL = 4,
    DDB_REFRESH_LIST    = 8,
    DDB_LIST_CHANGED    = 16,
};

void ddb_listview_refresh (DdbListview *listview, uint32_t flags);

gboolean
ddb_listview_list_drag_drop                  (GtkWidget       *widget,
                                        GdkDragContext  *drag_context,
                                        gint             x,
                                        gint             y,
                                        guint            time,
                                        gpointer         user_data);

void
ddb_listview_list_drag_data_get              (GtkWidget       *widget,
                                        GdkDragContext  *drag_context,
                                        GtkSelectionData *data,
                                        guint            info,
                                        guint            time,
                                        gpointer         user_data);

void
ddb_listview_list_drag_end                   (GtkWidget       *widget,
                                        GdkDragContext  *drag_context,
                                        gpointer         user_data);

void
ddb_listview_list_drag_data_received         (GtkWidget       *widget,
                                        GdkDragContext  *drag_context,
                                        gint             x,
                                        gint             y,
                                        GtkSelectionData *data,
                                        guint            target_type,
                                        guint            time,
                                        gpointer         user_data);

void
ddb_listview_list_drag_leave                 (GtkWidget       *widget,
                                        GdkDragContext  *drag_context,
                                        guint            time,
                                        gpointer         user_data);

void
ddb_listview_list_drag_end                   (GtkWidget       *widget,
                                        GdkDragContext  *drag_context,
                                        gpointer         user_data);

void
ddb_listview_clear_sort (DdbListview *listview);

void
ddb_listview_lock_columns (DdbListview *lv, gboolean lock);

int
ddb_listview_get_row_pos (DdbListview *listview, int row_idx);

void
ddb_listview_groupcheck (DdbListview *listview);

int
ddb_listview_is_album_art_column (DdbListview *listview, int x);

G_END_DECLS

#endif // __DDBLISTVIEW_H