src/bfu/listbox.h

   1 #ifndef EL__BFU_LISTBOX_H
   2 #define EL__BFU_LISTBOX_H
   3
   4 #include "util/align.h"
   5 #include "util/lists.h"
   6
   7 struct dialog;
   8 struct listbox_data;
   9 struct listbox_item;
  10 struct terminal;
  11 struct uri;
  12 struct widget_data;
  13
  14
  15 void add_dlg_listbox(struct dialog *dlg, void *box_data);
  16
  17 enum listbox_match {
  18         LISTBOX_MATCH_OK,
  19         LISTBOX_MATCH_NO,
  20         LISTBOX_MATCH_IMPOSSIBLE,
  21 };
  22
  23 /* Structure that can be used for storing all relevant info when traversing
  24  * listboxes. */
  25 struct listbox_context {
  26         /* The terminal we are running on */
  27         struct terminal *term;
  28
  29         /* Used for saving a specific item that should be used later when
  30          * traversing listboxes has ended. */
  31         struct listbox_item *item;
  32
  33         /* The current listbox widgets data */
  34         struct listbox_data *box;
  35
  36         /* The current (hierbox browser) dialog stuff */
  37         struct dialog_data *dlg_data;
  38         struct widget_data *widget_data;
  39
  40         /* Used when distributing? the current selected to another position */
  41         int dist;
  42
  43         /* The offset of the current box from the top */
  44         int offset;
  45 };
  46
  47 struct listbox_ops_messages {
  48         unsigned char *cant_delete_item;          /* %s = text of item */
  49         unsigned char *cant_delete_used_item;     /* %s = text of item */
  50         unsigned char *cant_delete_folder;        /* %s = text of item */
  51         unsigned char *cant_delete_used_folder;   /* %s = text of item */
  52         unsigned char *delete_marked_items_title; /* not a format string */
  53         unsigned char *delete_marked_items;       /* not a format string */
  54         unsigned char *delete_folder_title;       /* not a format string */
  55         unsigned char *delete_folder;             /* %s = text of item */
  56         unsigned char *delete_item_title;         /* not a format string */
  57         unsigned char *delete_item;               /* %s = text of item */
  58         unsigned char *clear_all_items_title;     /* not a format string */
  59         unsigned char *clear_all_items;           /* not a format string */
  60 };
  61
  62 /* TODO: We can maybe find a better way of figuring out whether a user of a
  63  * generic button handler has implemented all the required functions. --jonas
  64  * */
  65 struct listbox_ops {
  66         /* Some basic util/object.h wrappers */
  67         void (*lock)(struct listbox_item *);
  68         void (*unlock)(struct listbox_item *);
  69         int (*is_used)(struct listbox_item *);
  70
  71         unsigned char *(*get_text)(struct listbox_item *, struct terminal *);
  72         unsigned char *(*get_info)(struct listbox_item *, struct terminal *);
  73
  74         struct uri *(*get_uri)(struct listbox_item *);
  75
  76         struct listbox_item *(*get_root)(struct listbox_item *);
  77
  78         /* Do a search on the item. */
  79         enum listbox_match (*match)(struct listbox_item *, struct terminal *,
  80                                     unsigned char *text);
  81
  82         /* Before calling delete() thou shall call can_delete(). */
  83         int (*can_delete)(struct listbox_item *);
  84
  85         /* Delete the listbox item object, its data and all nested listboxes.
  86          * @last is non zero when either deleting only one item or when
  87          * deleting the last item. */
  88         void (*delete)(struct listbox_item *, int last);
  89
  90         /* If defined it means that the it will control all drawing of the
  91          * listbox item text and what might else be possible on the screen on
  92          * line @y from @x and @width chars onwards. */
  93         void (*draw)(struct listbox_item *, struct listbox_context *,
  94                      int x, int y, int width);
  95
  96         struct listbox_ops_messages *messages;
  97 };
  98
  99 /* Stores display information about a box. Kept in cdata. */
 100 struct listbox_data {
 101         LIST_HEAD(struct listbox_data);
 102
 103         const struct listbox_ops *ops; /* Backend-provided operations */
 104         struct listbox_item *sel; /* Item currently selected */
 105         struct listbox_item *top; /* Item which is on the top line of the box */
 106
 107         int sel_offset; /* Offset of selected item against the box top */
 108         struct list_head *items; /* The list being displayed */
 109 };
 110
 111 enum listbox_item_type {
 112         BI_LEAF,
 113         BI_FOLDER,
 114         BI_SEPARATOR
 115 };
 116
 117 /* An item in a box */
 118 struct listbox_item {
 119         LIST_HEAD(struct listbox_item);
 120
 121         /* The list may be empty for leaf nodes or non-hiearchic listboxes */
 122         struct list_head child;
 123
 124         enum listbox_item_type type;
 125         int depth;
 126
 127         unsigned int expanded:1; /* Only valid if this is a BI_FOLDER */
 128         unsigned int visible:1; /* Is this item visible? */
 129         unsigned int marked:1;
 130
 131         void *udata;
 132 };
 133
 134 extern const struct widget_ops listbox_ops;
 135
 136 void dlg_format_listbox(struct terminal *, struct widget_data *, int, int *, int, int, int *, enum format_align, int format_only);
 137
 138 struct listbox_item *traverse_listbox_items_list(struct listbox_item *, struct listbox_data *, int, int, int (*)(struct listbox_item *, void *, int *), void *);
 139
 140 void listbox_sel_move(struct widget_data *, int);
 141 void listbox_sel(struct widget_data *widget_data, struct listbox_item *item);
 142 struct listbox_data *get_listbox_widget_data(struct widget_data *widget_data);
 143
 144 #define get_dlg_listbox_data(dlg_data) \
 145         get_listbox_widget_data(dlg_data->widgets_data)
 146
 147 #endif