11 struct yx_uint16 br; };
13 static void refit_pad (struct WinMeta *);
14 static void place_window (struct WinMeta *, struct Win *);
15 static void update_windows (struct WinMeta *, struct Win *);
16 static void destroy_window (struct Win *);
17 static void draw_windows_borders (struct Win *, struct Win *, struct Corners *, uint16_t);
18 static void draw_window_borders (struct Win *, char);
19 static void draw_windows (struct Win *);
20 static void draw_vertical_scroll_hint (struct WinMeta *, uint16_t, uint32_t, char);
22 extern struct WinMeta init_win_meta (WINDOW * screen) {
23 // Create and populate WinMeta struct with sane default values.
24 struct WinMeta win_meta;
25 win_meta.screen = screen;
26 win_meta.size.y = getmaxy(screen);
27 win_meta.size.x = getmaxx(screen);
28 win_meta.chain_start = 0;
29 win_meta.chain_end = 0;
30 win_meta.pad_offset = 0;
31 win_meta.pad = newpad(win_meta.size.y, 1);
35 extern struct Win init_window (struct WinMeta * win_meta, char * title, void * data, void * func) {
36 // Create and populate Win struct with sane default values.
43 win.size.y = win_meta->size.y - 1;
48 extern void append_window (struct WinMeta * win_meta, struct Win * win) {
49 // Append win to window chain. Set active, if first window. Update geometry of windows from new window on.
50 if (0 != win_meta->chain_start) {
51 win->prev = win_meta->chain_end;
52 win_meta->chain_end->next = win; }
54 win_meta->active = win;
55 win_meta->chain_start = win; }
56 win_meta->chain_end = win;
57 update_windows(win_meta, win); }
59 static void refit_pad (struct WinMeta * win_meta) {
60 // Fit pad width to minimum width demanded by current windows' geometries.
61 uint16_t lastwincol = 0;
62 struct Win * win_p = win_meta->chain_start;
64 if (win_p->start.x + win_p->size.x > lastwincol + 1)
65 lastwincol = win_p->start.x + win_p->size.x - 1;
66 win_p = win_p->next; }
67 if (getmaxx(win_meta->pad) != lastwincol)
68 wresize(win_meta->pad, getmaxy(win_meta->pad), lastwincol + 2); }
70 extern void suspend_window (struct WinMeta * win_meta, struct Win * win) {
71 // Destroy win, suspend from chain. Update geometry of following rows and pad, as well as activity selection.
73 if (win_meta->chain_start != win) // Give win's position in the chain to element next to it in the chain.
74 win->prev->next = win->next;
76 win_meta->chain_start = win->next;
77 char pad_refitted = 0;
78 if (win_meta->chain_end != win) { // Let chain element next to win know its new predecessor.
79 win->next->prev = win->prev;
80 if (win_meta->active == win) // If win was active, shift active window pointer to
81 win_meta->active = win->next; // the next chain element, if that is a window ...
82 update_windows(win_meta, win->next);
85 win_meta->chain_end = win->prev;
86 if (win_meta->active == win) // ... or else to the previous element.
87 win_meta->active = win->prev; }
90 if (0 == pad_refitted) // Refit pad if necessary.
91 refit_pad(win_meta); }
93 static void place_window (struct WinMeta * win_meta, struct Win * win) {
94 // Based on position and sizes of previous window, find fitting place for current window.
95 win->start.x = 0; // if window is first in chain, place it on top-left corner
98 struct Win * win_top = win->prev;
99 while (win_top->start.y != 1)
100 win_top = win_top->prev; // else, default to placing window in new top
101 win->start.x = win_top->start.x + win_top->size.x + 1; // column to the right of the last one
102 uint16_t winprev_maxy = win->prev->start.y + getmaxy(win->prev->curses);
103 if (win->size.x <= win->prev->size.x && win->size.y < win_meta->size.y - winprev_maxy) {
104 win->start.x = win->prev->start.x; // place window below previous window if it fits
105 win->start.y = winprev_maxy + 1; } // vertically and is not wider than its predecessor
107 struct Win * win_up = win->prev;
108 struct Win * win_upup = win_up;
110 while (win_up != win_top) {
111 win_upup = win_up->prev;
113 if (win_up->start.y != win_upup->start.y)
115 win_upup = win_upup->prev; }
116 winprev_maxy = win_upup->start.y + getmaxy(win_upup->curses);
117 widthdiff = (win_upup->start.x + win_upup->size.x) - (win_up->start.x + win_up->size.x);
118 if (win->size.y < win_meta->size.y - winprev_maxy && win->size.x < widthdiff) {
119 win->start.x = win_up->start.x + win_up->size.x + 1; // else try to open new sub column under last
120 win->start.y = winprev_maxy + 1; // window below which enough space remains
122 win_up = win_upup; } } } }
124 static void update_windows (struct WinMeta * win_meta, struct Win * win) {
125 // Update geometry of win and its next of kin. Destroy (if visible), (re-)build window. If need, resize pad.
126 if (0 != win->curses)
127 destroy_window (win);
128 place_window(win_meta, win);
130 win->curses = subpad(win_meta->pad, win->size.y, win->size.x, win->start.y, win->start.x);
132 update_windows (win_meta, win->next); }
134 static void destroy_window (struct Win * win) {
139 static void draw_window_borders (struct Win * win, char active) {
140 // Draw borders of window win, including title. Decorate in a special way if window is marked as active.
142 for (y = win->start.y; y <= win->start.y + win->size.y; y++) {
143 mvwaddch(wgetparent(win->curses), y, win->start.x - 1, '|');
144 mvwaddch(wgetparent(win->curses), y, win->start.x + win->size.x, '|'); }
145 for (x = win->start.x; x <= win->start.x + win->size.x; x++) {
146 mvwaddch(wgetparent(win->curses), win->start.y - 1, x, '-');
147 mvwaddch(wgetparent(win->curses), win->start.y + win->size.y, x, '-'); }
148 char min_title_length_visible = 3; // 1 char minimal, plus 2 chars for decoration left/right of title
149 if (win->size.x >= min_title_length_visible) {
150 uint16_t title_offset = 0;
151 if (win->size.x > strlen(win->title) + 2)
152 title_offset = (win->size.x - (strlen(win->title) + 2)) / 2; // + 2 is for decoration
153 uint16_t length_visible = strnlen(win->title, win->size.x - 2);
154 char title[length_visible + 3];
155 char decoration = ' ';
158 memcpy(title + 1, win->title, length_visible);
159 title[0] = title[length_visible + 1] = decoration;
160 title[length_visible + 2] = '\0';
161 mvwaddstr(wgetparent(win->curses), win->start.y - 1, win->start.x + title_offset, title); } }
163 static void draw_windows_borders (struct Win * win, struct Win * win_active, struct Corners * corners, uint16_t ccount) {
164 // Craw draw_window_borders() for all windows in chain from win on. Save current window's border corners.
166 if (win == win_active)
168 draw_window_borders(win, active);
169 corners[ccount].tl.y = win->start.y - 1;
170 corners[ccount].tl.x = win->start.x - 1;
171 corners[ccount].tr.y = win->start.y - 1;
172 corners[ccount].tr.x = win->start.x + win->size.x;
173 corners[ccount].bl.y = win->start.y + win->size.y;
174 corners[ccount].bl.x = win->start.x - 1;
175 corners[ccount].br.y = win->start.y + win->size.y;
176 corners[ccount].br.x = win->start.x + win->size.x;
177 if (0 != win->next) {
178 draw_windows_borders (win->next, win_active, corners, ccount + 1); } }
180 static void draw_windows (struct Win * win) {
181 // Draw contents of all windows in window chain from win on.
183 if (0 != win->next) {
184 draw_windows (win->next); } }
186 static void draw_vertical_scroll_hint (struct WinMeta * win_meta, uint16_t x, uint32_t more_cols, char dir) {
187 // Draw scroll hint line in win at col x of pad display, announce more_cols more columns in direction dir.
189 char phrase[] = "more columns";
190 char * scrolldesc = malloc((3 * sizeof(char)) + strlen(phrase) + 10); // 10 = max chars for uint32_t string
191 sprintf(scrolldesc, " %d %s ", more_cols, phrase);
193 if (win_meta->size.y > (strlen(scrolldesc) + 1))
194 offset = (win_meta->size.y - strlen(scrolldesc)) / 2;
195 for (y = 0; y < win_meta->size.y; y++)
196 if (y >= offset && y < strlen(scrolldesc) + offset)
197 mvwaddch(win_meta->pad, y, x, scrolldesc[y - offset] | A_REVERSE);
199 mvwaddch(win_meta->pad, y, x, dir | A_REVERSE);
202 extern void draw_all_windows (struct WinMeta * win_meta) {
203 // Draw pad with all windows and their borders, plus scrolling hints.
205 wnoutrefresh(win_meta->screen);
206 werase(win_meta->pad);
207 if (win_meta->chain_start) {
209 struct Win * win_p = win_meta->chain_start;
210 while (0 != win_p->next) {
213 struct Corners * all_corners = malloc(sizeof(struct Corners) * n_wins);
214 draw_windows (win_meta->chain_start);
215 draw_windows_borders (win_meta->chain_start, win_meta->active, all_corners, 0);
217 for (i = 0; i < n_wins; i++) {
218 mvwaddch(win_meta->pad, all_corners[i].tl.y, all_corners[i].tl.x, '+');
219 mvwaddch(win_meta->pad, all_corners[i].tr.y, all_corners[i].tr.x, '+');
220 mvwaddch(win_meta->pad, all_corners[i].bl.y, all_corners[i].bl.x, '+');
221 mvwaddch(win_meta->pad, all_corners[i].br.y, all_corners[i].br.x, '+'); }
224 if (win_meta->pad_offset > 0)
225 draw_vertical_scroll_hint(win_meta, win_meta->pad_offset, win_meta->pad_offset + 1, '<');
226 if (win_meta->pad_offset + win_meta->size.x < getmaxx(win_meta->pad) - 1)
227 for (y = 0; y < win_meta->size.y; y++)
228 draw_vertical_scroll_hint(win_meta, win_meta->pad_offset + win_meta->size.x - 1,
229 getmaxx(win_meta->pad) - (win_meta->pad_offset + win_meta->size.x), '>');
230 pnoutrefresh(win_meta->pad, 0, win_meta->pad_offset, 0, 0, win_meta->size.y, win_meta->size.x - 1); }
233 extern void resize_active_window (struct WinMeta * win_meta, uint16_t height, uint16_t width) {
234 // Grow or shrink currently active window. Correct its geometry and that of its followers.
235 if (0 != win_meta->active && width > 0 && height > 0 && height < win_meta->size.y) {
236 win_meta->active->size.y = height;
237 win_meta->active->size.x = width;
238 update_windows(win_meta, win_meta->chain_start); } }
240 extern void cycle_active_window (struct WinMeta * win_meta, char dir) {
241 // Cycle active window selection forwards (dir = 'n') or backwards.
242 if (0 != win_meta->active) {
244 if (win_meta->active->next != 0)
245 win_meta->active = win_meta->active->next;
247 win_meta->active = win_meta->chain_start; }
249 if (win_meta->active->prev != 0)
250 win_meta->active = win_meta->active->prev;
252 win_meta->active = win_meta->chain_end; } } }
254 extern void shift_active_window (struct WinMeta * win_meta, char dir) {
255 // Move active window forward/backward in window chain. If jumping beyond start/end, move to other chain end.
256 if (0 != win_meta->active && win_meta->chain_start != win_meta->chain_end && (dir == 'f' || dir == 'b')) {
257 struct Win * win_shift = win_meta->active, * win_p, * win_p_next;
259 if ((dir == 'f' && win_shift == win_meta->chain_end)
260 || (dir == 'b' && win_shift == win_meta->chain_start))
263 for (i_max = 1, win_p = win_meta->chain_start; win_p != win_meta->chain_end; i_max++)
265 struct Win ** wins = malloc(i_max * sizeof(struct Win *));
266 for (i = 0, win_p = win_meta->chain_start; i < i_max; i++) {
267 win_p_next = win_p->next;
268 suspend_window(win_meta, win_p);
270 win_p = win_p_next; }
273 append_window(win_meta, win_shift);
274 for (i = 0; i < i_max - 1; i++)
275 append_window(win_meta, wins[i]); }
277 for (i = 1; i < i_max; i++)
278 append_window(win_meta, wins[i]);
279 append_window(win_meta, win_shift); }
281 for (i = 0; i < i_max; i++)
282 if ((dir == 'f' && win_shift == wins[i]) || (dir == 'b' && win_shift == wins[i+1])) {
283 append_window(win_meta, wins[i+1]);
284 append_window(win_meta, wins[i]);
287 append_window(win_meta, wins[i]);
289 win_meta->active = win_shift; } }
291 extern void reset_pad_offset(struct WinMeta * win_meta, uint16_t new_offset) {
292 // Apply new_offset to windows pad, if it proves to be sane.
293 if (new_offset >= 0 && new_offset + win_meta->size.x < getmaxx(win_meta->pad))
294 win_meta->pad_offset = new_offset; }