1 /* src/client/windows.c
3 * This file is part of PlomRogue. PlomRogue is licensed under the GPL version 3
4 * or any later version. For details on its copyright, license, and warranties,
5 * see the file NOTICE in the root directory of the PlomRogue source package.
8 #define _POSIX_C_SOURCE 200809L /* strnlen() */
10 #include <ncurses.h> /* chtype, getmaxx(), getmaxy(), erase(), werase(),
11 * endwin(), delwin(), wnoutrefresh(), pnoutrefresh(),
12 * doupdate(), refresh(), delwin(), newpad(), mvwaddch(),
15 #include <stddef.h> /* NULL */
16 #include <stdint.h> /* uint8_t, uint16_t, uint32_t, UINT16_MAX */
17 #include <stdio.h> /* sprintf() */
18 #include <stdlib.h> /* free() */
19 #include <string.h> /* memcpy(), strlen(), strnlen(), memset() */
20 #include "../common/rexit.h" /* exit_trouble(), exit_err() */
21 #include "../common/try_malloc.h" /* try_malloc() */
22 #include "draw_wins.h" /* draw_winconf_geometry(), draw_winconf_keybindings(),
23 * draw_win_inventory(), draw_win_info(), draw_win_log(),
24 * draw_win_global_keys(),draw_win_active_windows_keys(),
25 * draw_win_keybindings_winconf_keybindings(),
26 * draw_win_keybindings_winconf_geometry(),
27 * draw_win_keybindings_global(), draw_win_map()
29 #include "wincontrol.h" /* toggle_window() */
30 #include "world.h" /* world */
34 /* Calculate "id"'s window's size from v_screen size and .target_(height/width).
35 * A .target_width == 0 makes the window as wide as .t_screen. .target_height ==
36 * 0 sets the maximum allowed height: one cell smaller than that of .v_screen.
37 * Negative values make width/height so many cells smaller than what 0 would
38 * set. Values that would reduce the window height or width to less than 1 cell
39 * according to the aforementioned rules set the height/width as if they were 0.
41 static void init_win_size_from_winconf_and_v_screen_size(char id);
43 /* Get (Win->draw) function identified by "c"; NULL if c not mapped to one.
44 * match_func() is just a little helper to it.
46 static uint8_t match_func(char c, void (** f) (), char c_m, void (* f_m) ());
47 static void (* get_drawfunc_by_char(char c)) ();
49 /* Iterate over chars of world.winDB.ids array / string. Restart after \0.*/
50 static char get_next_win_id();
52 /* Draw scroll hint (a line saying that there are "dist" more elements of "unit"
53 * further into the direction symbolized by "dir") into .v_screen, onto an
54 * appropriate edge of a window or .v_screen; the left/right edge if "dir" is
55 * "<"/">", or the top/bottom edge if it is "^"/"v". Use "start" as the start
56 * coordinate of the frame that is to contain the scroll hints. winscroll_hint()
57 * is a wrapper that uses the border of window "w" as this frame.
59 static void scroll_hint(struct yx_uint16 fsize, char dir, uint16_t dist,
60 char * unit, struct yx_uint16 start);
61 static void winscroll_hint(struct Win * w, char dir, uint16_t dist);
63 /* draw_win_borderlines() draws vertical/horizontal borders of window "w" sans
64 * corners into .v_screen. It draws the top border line as the windows' title
65 * bar (highlighted if the window is selected as active). It is called
66 * recursively by draw_wins_borderlines() on all windows from "w" on.
67 * draw_wins_bordercorners() draws the border corners of "w" and its successors.
69 static void draw_win_borderlines(struct Win * w);
70 static void draw_wins_borderlines(struct Win * w);
71 static void draw_wins_bordercorners(struct Win * w);
73 /* Draw contents of all windows in window chain from window "w" onwards. */
74 static void draw_wins(struct Win * w);
78 static void init_win_size_from_winconf_and_v_screen_size(char id)
80 struct Win * w = get_win_by_id(id);
81 w->frame_size.y = world.winDB.v_screen_size.y - 1;
82 if ( 0 < w->target_height
83 && w->target_height <= world.winDB.v_screen_size.y - 1)
85 w->frame_size.y = w->target_height;
87 else if ( 0 > w->target_height
88 && world.winDB.v_screen_size.y + (w->target_height - 1) > 0)
90 w->frame_size.y = world.winDB.v_screen_size.y + (w->target_height - 1);
92 w->frame_size.x = world.winDB.v_screen_size.x;
93 if (0 < w->target_width)
95 w->frame_size.x = w->target_width;
97 else if ( 0 > w->target_width
98 && world.winDB.v_screen_size.x + w->target_width > 0)
100 w->frame_size.x = world.winDB.v_screen_size.x + w->target_width;
106 static uint8_t match_func(char c, void (** f) (), char c_m, void (* f_m) ())
118 static void (* get_drawfunc_by_char(char c)) ()
120 void (* f) (struct Win *) = NULL;
121 if ( match_func(c, &f, 'c', draw_win_inventory)
122 || match_func(c, &f, 'i', draw_win_info)
123 || match_func(c, &f, 'l', draw_win_log)
124 || match_func(c, &f, 'g', draw_win_global_keys)
125 || match_func(c, &f, 'a', draw_win_active_windows_keys)
126 || match_func(c, &f, 'm', draw_win_map)
127 || match_func(c, &f, '0', draw_win_keybindings_global)
128 || match_func(c, &f, '1', draw_win_keybindings_winconf_geometry)
129 || match_func(c, &f, '2', draw_win_keybindings_winconf_keybindings))
138 static char get_next_win_id()
140 static uint8_t i = 0;
141 char c = world.winDB.ids[i];
153 static void scroll_hint(struct yx_uint16 fsize, char dir, uint16_t dist,
154 char * unit, struct yx_uint16 start)
156 /* Decide on alignment (vertical/horizontal?), thereby hint text space. */
157 char * more = "more";
158 uint16_t dsc_space = fsize.x;
159 if ('<' == dir || '>' == dir)
162 } /* vv-- 10 = max strlen for uint16_t */
163 uint16_t size = 1 + strlen(more) + 1 + 10 + 1 + strlen(unit) + 1 + 1;
164 char * scrolldsc = try_malloc(size, __func__);
165 int test = sprintf(scrolldsc, " %d %s %s ", dist, more, unit);
166 exit_trouble(test < 0, __func__, "sprintf");
168 /* Decide on offset of the description text inside the scroll hint line. */
169 uint16_t dsc_offset = 1;
170 if (dsc_space > strlen(scrolldsc) + 1)
172 dsc_offset = (dsc_space - strlen(scrolldsc)) / 2;
175 /* Draw scroll hint line as dir symbols bracketing description text. */
176 uint16_t draw_offset = 0;
179 draw_offset = fsize.x - 1;
183 draw_offset = fsize.y - 1;
186 for (; q < dsc_space; q++)
188 chtype c = dir | A_REVERSE;
189 if (q >= dsc_offset && q < strlen(scrolldsc) + dsc_offset)
191 c = scrolldsc[q - dsc_offset] | A_REVERSE;
193 if ('<' == dir || '>' == dir)
195 mvwaddch(world.winDB.v_screen, start.y+q, start.x+draw_offset, c);
198 mvwaddch(world.winDB.v_screen, start.y + draw_offset, start.x + q, c);
205 static void winscroll_hint(struct Win * w, char dir, uint16_t dist)
207 char * unit = "lines";
208 if ('<' == dir || '>' == dir)
212 struct yx_uint16 start = w->start;
213 scroll_hint(w->frame_size, dir, dist, unit, start);
218 static void draw_win_borderlines(struct Win * w)
220 /* Draw vertical and horizontal border lines. */
222 for (y = w->start.y; y <= w->start.y + w->frame_size.y; y++)
224 mvwaddch(world.winDB.v_screen, y, w->start.x - 1, '|');
225 mvwaddch(world.winDB.v_screen, y, w->start.x + w->frame_size.x, '|');
227 for (x = w->start.x; x <= w->start.x + w->frame_size.x; x++)
229 mvwaddch(world.winDB.v_screen, w->start.y - 1, x, '-');
230 mvwaddch(world.winDB.v_screen, w->start.y + w->frame_size.y, x, '-');
233 /* Draw as much as possible of the title into center of top border line. */
234 uint8_t min_title_length_visible = 3;/* min. 1 char +2 padding/decoration*/
235 if (w->frame_size.x >= min_title_length_visible)
238 if (w->frame_size.x > strlen(w->title) + 2)
240 offset = (w->frame_size.x - (strlen(w->title) + 2)) / 2;
241 } /* +2 is for padding/decoration */
242 uint16_t length_visible = strnlen(w->title, w->frame_size.x - 2);
243 char * title = try_malloc(length_visible + 3, "draw_win_borderlines");
244 char decoration = ' ';
245 if (w->id == world.winDB.active)
249 memcpy(title + 1, w->title, length_visible);
250 title[0] = title[length_visible + 1] = decoration;
251 title[length_visible + 2] = '\0';
252 mvwaddstr(world.winDB.v_screen, w->start.y-1, w->start.x+offset, title);
259 static void draw_wins_borderlines(struct Win * w)
261 draw_win_borderlines(w);
262 struct Win * next = get_win_after(w->id);
265 draw_wins_borderlines(next);
271 static void draw_wins_bordercorners(struct Win * w)
273 mvwaddch(world.winDB.v_screen,
274 w->start.y - 1, w->start.x - 1, '+');
275 mvwaddch(world.winDB.v_screen,
276 w->start.y - 1, w->start.x + w->frame_size.x, '+');
277 mvwaddch(world.winDB.v_screen,
278 w->start.y + w->frame_size.y, w->start.x - 1, '+');
279 mvwaddch(world.winDB.v_screen, w->start.y + w->frame_size.y,
280 w->start.x + w->frame_size.x, '+');
281 struct Win * next = get_win_after(w->id);
284 draw_wins_bordercorners(next);
290 static void draw_wins(struct Win * w)
292 void (* drawfunc) (struct Win *) = get_drawfunc_by_char(w->id);
295 drawfunc = draw_winconf_geometry;
297 else if (2 == w->view)
299 drawfunc = draw_winconf_keybindings;
302 uint16_t size_y = w->winmap_size.y;
303 uint16_t size_x = w->winmap_size.x;
304 uint16_t offset_y = center_offset(w->center.y, size_y, w->frame_size.y);
305 uint16_t offset_x = center_offset(w->center.x, size_x, w->frame_size.x);
307 for (y = offset_y; y < w->frame_size.y + offset_y && y < size_y; y++)
309 for (x = offset_x; x < w->frame_size.x + offset_x && x < size_x; x++)
311 chtype ch = w->winmap[(y * w->winmap_size.x) + x];
312 mvwaddch(world.winDB.v_screen, w->start.y + (y - offset_y),
313 w->start.x + (x - offset_x), ch);
316 free(w->winmap); /* NULL so draw_wins.c's try_resize_winmap() may always */
317 w->winmap = NULL;/* free() it before (re-)allocation, even the first time.*/
318 memset(&w->winmap_size, 0, sizeof(struct yx_uint16));
321 winscroll_hint(w, '^', offset_y + 1);
323 if (size_y > offset_y + w->frame_size.y)
325 winscroll_hint(w, 'v', size_y - ((offset_y + w->frame_size.y) - 1));
329 winscroll_hint(w, '<', offset_x + 1);
331 if (size_x > offset_x + w->frame_size.x)
333 winscroll_hint(w, '>', size_x - ((offset_x + w->frame_size.x) - 1));
335 struct Win * next = get_win_after(w->id);
344 extern uint8_t get_win_pos_in_order(char c)
347 for (i = 0; c != world.winDB.order[i]; i++);
353 extern struct Win * get_win_after(char c)
355 return get_win_by_id(world.winDB.order[get_win_pos_in_order(c) + 1]);
360 extern uint16_t center_offset(uint16_t position, uint32_t mapsize,
364 if (mapsize > frame_size)
366 if (position > frame_size / 2)
368 if (position < mapsize - (frame_size / 2))
370 offset = position - (frame_size / 2);
374 offset = mapsize - frame_size;
383 extern struct Win * get_win_by_id(char id)
386 while ('\0' != world.winDB.ids[i])
388 if (id == world.winDB.ids[i])
390 return &world.winDB.wins[i];
399 extern void make_v_screen_and_init_win_sizes()
401 char * err_s = "creating an illegaly large virtual screen";
402 char * err_m = "triggering a memory allocation error via newpad";
403 uint32_t maxy_test = getmaxy(world.winDB.t_screen);
404 uint32_t maxx_test = getmaxx(world.winDB.t_screen);
405 exit_trouble(maxy_test>UINT16_MAX || maxx_test>UINT16_MAX, __func__, err_s);
406 world.winDB.v_screen_size.y = maxy_test;
407 world.winDB.v_screen_size.x = maxx_test;
408 world.winDB.v_screen = newpad(world.winDB.v_screen_size.y, 1);
409 exit_trouble(!world.winDB.v_screen, __func__, err_m);
411 while (0 != (id = get_next_win_id()))
413 init_win_size_from_winconf_and_v_screen_size(id);
419 extern void free_winDB()
422 while (0 != (id = get_next_win_id()))
424 struct Win * wc = get_win_by_id(id);
428 free(world.winDB.ids);
429 free(world.winDB.wins);
430 free(world.winDB.order);
435 extern void winch_called()
442 extern void reset_windows_on_winch()
444 endwin(); /* "[S]tandard way" to recalibrate ncurses post SIGWINCH, says */
445 refresh(); /* <http://invisible-island.net/ncurses/ncurses-intro.html>. */
446 char * tmp_order = try_malloc(strlen(world.winDB.order) + 1, __func__);
447 int test = sprintf(tmp_order, "%s", world.winDB.order);
448 exit_trouble(test < 0, __func__, "sprintf");
450 char tmp_active = world.winDB.active;
451 for (i = 0; i < strlen(tmp_order); toggle_window(tmp_order[i]), i++);
452 delwin(world.winDB.v_screen);
453 make_v_screen_and_init_win_sizes();
454 for (i = 0; i < strlen(tmp_order); toggle_window(tmp_order[i]), i++);
456 world.winDB.active = tmp_active;
461 extern void draw_all_wins()
463 /* Empty everything before filling it a-new. */
465 wnoutrefresh(world.winDB.t_screen);
466 werase(world.winDB.v_screen);
467 if (world.winDB.active)
470 /* Draw borders, wins. Order matters: corners should overwrite lines. */
471 draw_wins_borderlines(get_win_by_id(world.winDB.order[0]));
472 draw_wins_bordercorners(get_win_by_id(world.winDB.order[0]));
473 draw_wins(get_win_by_id(world.winDB.order[0]));
475 /* Draw .v_screen scroll hints. */
476 struct yx_uint16 start;
478 start.x = world.winDB.v_screen_offset;
479 char * cols_string = "columns";
480 if (world.winDB.v_screen_offset > 0)
482 scroll_hint(world.winDB.v_screen_size, '<',
483 world.winDB.v_screen_offset + 1, cols_string, start);
485 uint16_t size_x = getmaxx(world.winDB.v_screen);
486 uint16_t right_edge = world.winDB.v_screen_offset
487 + world.winDB.v_screen_size.x;
488 if (right_edge < size_x - 1)
490 scroll_hint(world.winDB.v_screen_size, '>',
491 size_x - right_edge, cols_string, start);
494 /* Put .v_screen segment to be shown on .t_screen to .t_screen buffer.*/
495 pnoutrefresh(world.winDB.v_screen, 0, world.winDB.v_screen_offset, 0, 0,
496 world.winDB.v_screen_size.y,
497 world.winDB.v_screen_size.x - 1);
500 /* Only at the end write accumulated changes to .t_screen. */