src/list_window.h

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2010 The Music Player Daemon Project
   3  * Project homepage: http://musicpd.org
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #ifndef LIST_WINDOW_H
  21 #define LIST_WINDOW_H
  22
  23 #include "config.h"
  24 #include "command.h"
  25 #include "colors.h"
  26 #include "ncmpc_curses.h"
  27
  28 #include <glib.h>
  29 #include <stdbool.h>
  30
  31 typedef const char *
  32 (*list_window_callback_fn_t)(unsigned i, void *data);
  33
  34 typedef void
  35 (*list_window_paint_callback_t)(WINDOW *w, unsigned i,
  36                                 unsigned y, unsigned width,
  37                                 bool selected,
  38                                 void *data);
  39
  40 struct list_window {
  41         WINDOW *w;
  42         unsigned rows, cols;
  43
  44         /**
  45          * Number of items in this list.
  46          */
  47         unsigned length;
  48
  49         unsigned start;
  50         unsigned selected;
  51         unsigned range_base;        /* represents the base item. */
  52         bool range_selection;       /* range selection activated */
  53
  54         bool hide_cursor;
  55 };
  56
  57 /**
  58  * The bounds of a range selection, see list_window_get_range().
  59  */
  60 struct list_window_range {
  61         /**
  62          * The index of the first selected item.
  63          */
  64         unsigned start;
  65
  66         /**
  67          * The index after the last selected item.  The selection is
  68          * empty when this is the same as "start".
  69          */
  70         unsigned end;
  71 };
  72
  73 /* create a new list window */
  74 struct list_window *list_window_init(WINDOW *w,
  75                                      unsigned width, unsigned height);
  76
  77 /* destroy a list window */
  78 void list_window_free(struct list_window *lw);
  79
  80 /* reset a list window (selected=0, start=0) */
  81 void list_window_reset(struct list_window *lw);
  82
  83 void
  84 list_window_resize(struct list_window *lw, unsigned width, unsigned height);
  85
  86 void
  87 list_window_set_length(struct list_window *lw, unsigned length);
  88
  89 /* paint a list window */
  90 void list_window_paint(const struct list_window *lw,
  91                        list_window_callback_fn_t callback,
  92                        void *callback_data);
  93
  94 void
  95 list_window_paint2(const struct list_window *lw,
  96                    list_window_paint_callback_t paint_callback,
  97                    void *callback_data);
  98
  99 /* perform basic list window commands (movement) */
 100 bool
 101 list_window_cmd(struct list_window *lw, command_t cmd);
 102
 103 /**
 104  * Scroll the window.  Returns true if the command has been
 105  * consumed.
 106  */
 107 bool
 108 list_window_scroll_cmd(struct list_window *lw, command_t cmd);
 109
 110 #ifdef HAVE_GETMOUSE
 111 /**
 112  * The mouse was clicked.  Check if the list should be scrolled
 113  * Returns non-zero if the mouse event has been handled.
 114  */
 115 bool
 116 list_window_mouse(struct list_window *lw, unsigned long bstate, int y);
 117 #endif
 118
 119 /**
 120  * Centers the visible range around item n on the list.
 121  */
 122 void
 123 list_window_center(struct list_window *lw, unsigned n);
 124
 125 /**
 126  * Scrolls the view to item n, as if the cursor would have been moved
 127  * to the position.
 128  */
 129 void
 130 list_window_scroll_to(struct list_window *lw, unsigned n);
 131
 132 /**
 133  * Sets the position of the cursor.  Disables range selection.
 134  */
 135 void
 136 list_window_set_cursor(struct list_window *lw, unsigned i);
 137
 138 /**
 139  * Moves the cursor.  Modifies the range if range selection is
 140  * enabled.
 141  */
 142 void
 143 list_window_move_cursor(struct list_window *lw, unsigned n);
 144
 145 /**
 146  * Ensures that the cursor is visible on the screen, i.e. it is not
 147  * outside the current scrolling range.
 148  */
 149 void
 150 list_window_fetch_cursor(struct list_window *lw);
 151
 152 /**
 153  * Determines the lower and upper bound of the range selection.  If
 154  * range selection is disabled, it returns the cursor position (range
 155  * length is 1).
 156  */
 157 void
 158 list_window_get_range(const struct list_window *lw,
 159                       struct list_window_range *range);
 160
 161 /* find a string in a list window */
 162 bool
 163 list_window_find(struct list_window *lw,
 164                  list_window_callback_fn_t callback,
 165                  void *callback_data,
 166                  const char *str,
 167                  bool wrap,
 168                  bool bell_on_wrap);
 169
 170 /* find a string in a list window (reversed) */
 171 bool
 172 list_window_rfind(struct list_window *lw,
 173                   list_window_callback_fn_t callback,
 174                   void *callback_data,
 175                   const char *str,
 176                   bool wrap,
 177                   bool bell_on_wrap);
 178
 179 /* find a string in a list window which begins with the given characters in *str */
 180 bool
 181 list_window_jump(struct list_window *lw,
 182                  list_window_callback_fn_t callback,
 183                  void *callback_data,
 184                  const char *str);
 185
 186 #endif