7 struct WinMeta init_win_meta (WINDOW * screen) {
8 // Create and populate WinMeta struct with sane default values.
9 struct WinMeta win_meta;
10 win_meta.screen = screen;
11 win_meta.height = getmaxy(screen);
12 win_meta.width = getmaxx(screen);
13 win_meta.chain_start = 0;
14 win_meta.chain_end = 0;
15 win_meta.pad_offset = 0;
16 win_meta.pad = newpad(win_meta.height, 1);
20 void scroll_pad (struct WinMeta * win_meta, char dir) {
21 // Scroll pad left or right (if possible).
22 if ('+' == dir && win_meta->pad_offset + win_meta->width < getmaxx(win_meta->pad))
23 win_meta->pad_offset++;
24 else if ('-' == dir && win_meta->pad_offset > 0)
25 win_meta->pad_offset--; }
27 struct Win init_window (struct WinMeta * win_meta, char * title, void * data, void * func) {
28 // Create and populate Win struct with sane default values.
35 win.height = win_meta->height - 1;
40 void append_window (struct WinMeta * win_meta, struct Win * win) {
41 // Append win to window chain. Set active, if first window. Update geometry of windows from new window on.
42 if (0 != win_meta->chain_start) {
43 win->prev = win_meta->chain_end;
44 win_meta->chain_end->next = win; }
46 win_meta->active = win;
47 win_meta->chain_start = win; }
48 win_meta->chain_end = win;
49 update_windows(win_meta, win); }
51 void suspend_window (struct WinMeta * win_meta, struct Win * win) {
52 // Destroy win, suspend from window chain. Update geometry of following rows, as well as activity selection.
54 if (win_meta->chain_start != win) // Give win's position in the chain to element next to it in the chain.
55 win->prev->next = win->next;
57 win_meta->chain_start = win->next;
58 if (win_meta->chain_end != win) { // Let chain element next to win know its new predecessor.
59 win->next->prev = win->prev;
60 if (win_meta->active == win) // If win was active, shift active window pointer to
61 win_meta->active = win->next; // the next chain element, if that is a window ...
62 update_windows(win_meta, win->next); }
64 win_meta->chain_end = win->prev;
65 if (win_meta->active == win) // ... or else to the previous element.
66 win_meta->active = win->prev; }
70 struct yx place_window (struct WinMeta * win_meta, struct Win * win) {
71 // Based on position and sizes of previous window, find fitting place for current window.
73 start.x = 0; // if window is first in chain, place it on top-left corner
76 struct Win * win_top = win->prev;
77 while (getbegy(win_top->curses) != 1)
78 win_top = win_top->prev; // else, default to placing window in new top
79 start.x = getbegx(win_top->curses) + win_top->width + 1; // column to the right of the last one
80 uint16_t winprev_maxy = getbegy(win->prev->curses) + getmaxy(win->prev->curses);
81 if (win->width <= win->prev->width && win->height < win_meta->height - winprev_maxy) {
82 start.x = getbegx(win->prev->curses); // place window below previous window if it fits
83 start.y = winprev_maxy + 1; } // vertically and is not wider than its predecessor
85 struct Win * win_up = win->prev;
86 struct Win * win_upup = win_up;
88 while (win_up != win_top) {
89 win_upup = win_up->prev;
91 if (getbegy(win_up->curses) != getbegy(win_upup->curses))
93 win_upup = win_upup->prev; }
94 winprev_maxy = getbegy(win_upup->curses) + getmaxy(win_upup->curses);
95 widthdiff = (getbegx(win_upup->curses) + win_upup->width) - (getbegx(win_up->curses) + win_up->width);
96 if (win->height < win_meta->height - winprev_maxy && win->width < widthdiff) {
97 start.x = getbegx(win_up->curses) + win_up->width + 1; // else try to open new sub column under last
98 start.y = winprev_maxy + 1; // window below which enough space remains
100 win_up = win_upup; } } }
103 void update_windows (struct WinMeta * win_meta, struct Win * win) {
104 // Update geometry of win and its next of kin. Destroy (if visible), (re-)build window. If need, resize pad.
105 if (0 != win->curses)
106 destroy_window (win);
107 struct yx startyx = place_window(win_meta, win);
108 uint16_t lastwincol = 0;
109 struct Win * win_p = win_meta->chain_start;
111 if (win_p != win && getbegx(win_p->curses) + win_p->width > lastwincol + 1)
112 lastwincol = getbegx(win_p->curses) + win_p->width - 1;
113 else if (win_p == win && startyx.x + win->width > lastwincol + 1)
114 lastwincol = startyx.x + win->width - 1;
115 win_p = win_p->next; }
116 if (getmaxx(win_meta->pad) != lastwincol) {
117 wresize(win_meta->pad, getmaxy(win_meta->pad), lastwincol + 2); }
118 win->curses = subpad(win_meta->pad, win->height, win->width, startyx.y, startyx.x);
120 update_windows (win_meta, win->next); }
122 void destroy_window (struct Win * win) {
127 void draw_window_borders (struct Win * win, char active) {
128 // Draw borders of window win, including title. Decorate in a special way if window is marked as active.
130 for (y = getbegy(win->curses); y <= getbegy(win->curses) + win->height; y++) {
131 mvwaddch(wgetparent(win->curses), y, getbegx(win->curses) - 1, '|');
132 mvwaddch(wgetparent(win->curses), y, getbegx(win->curses) + win->width, '|'); }
133 for (x = getbegx(win->curses); x <= getbegx(win->curses) + win->width; x++) {
134 mvwaddch(wgetparent(win->curses), getbegy(win->curses) - 1, x, '-');
135 mvwaddch(wgetparent(win->curses), getbegy(win->curses) + win->height, x, '-'); }
136 char min_title_length_visible = 3; // 1 char minimal, plus 2 chars for decoration left/right of title
137 if (win->width >= min_title_length_visible) {
138 uint16_t title_offset = 0;
139 if (win->width > strlen(win->title) + 2)
140 title_offset = (win->width - (strlen(win->title) + 2)) / 2; // + 2 is for decoration
141 uint16_t length_visible = strnlen(win->title, win->width - 2);
142 char title[length_visible + 3];
143 char decoration = ' ';
146 memcpy(title + 1, win->title, length_visible);
147 title[0] = title[length_visible + 1] = decoration;
148 title[length_visible + 2] = '\0';
149 mvwaddstr (wgetparent(win->curses), getbegy(win->curses)-1, getbegx(win->curses)+title_offset, title); } }
151 void draw_windows_borders (struct Win * win, struct Win * win_active, struct Corners * corners, uint16_t ccount) {
152 // Craw draw_window_borders() for all windows in chain from win on. Save current window's border corners.
154 if (win == win_active)
156 draw_window_borders(win, active);
157 corners[ccount].tl.y = getbegy(win->curses) - 1;
158 corners[ccount].tl.x = getbegx(win->curses) - 1;
159 corners[ccount].tr.y = getbegy(win->curses) - 1;
160 corners[ccount].tr.x = getbegx(win->curses) + win->width;
161 corners[ccount].bl.y = getbegy(win->curses) + win->height;
162 corners[ccount].bl.x = getbegx(win->curses) - 1;
163 corners[ccount].br.y = getbegy(win->curses) + win->height;
164 corners[ccount].br.x = getbegx(win->curses) + win->width;
165 if (0 != win->next) {
166 draw_windows_borders (win->next, win_active, corners, ccount + 1); } }
168 void draw_windows (struct Win * win) {
169 // Draw contents of all windows in window chain from win on.
171 if (0 != win->next) {
172 draw_windows (win->next); } }
174 void draw_all_windows (struct WinMeta * win_meta) {
175 // Draw pad with all windows and their borders, plus scrolling hints.
177 wnoutrefresh(win_meta->screen);
178 werase(win_meta->pad);
179 if (win_meta->chain_start) {
181 struct Win * win_p = win_meta->chain_start;
182 while (0 != win_p->next) {
185 struct Corners * all_corners = malloc(sizeof(struct Corners) * n_wins);
186 draw_windows (win_meta->chain_start);
187 draw_windows_borders (win_meta->chain_start, win_meta->active, all_corners, 0);
189 for (i = 0; i < n_wins; i++) {
190 mvwaddch(win_meta->pad, all_corners[i].tl.y, all_corners[i].tl.x, '+');
191 mvwaddch(win_meta->pad, all_corners[i].tr.y, all_corners[i].tr.x, '+');
192 mvwaddch(win_meta->pad, all_corners[i].bl.y, all_corners[i].bl.x, '+');
193 mvwaddch(win_meta->pad, all_corners[i].br.y, all_corners[i].br.x, '+'); }
196 if (win_meta->pad_offset > 0)
197 for (y = 0; y < win_meta->height; y++)
198 mvwaddch(win_meta->pad, y, win_meta->pad_offset, '<' | A_REVERSE);
199 if (win_meta->pad_offset + win_meta->width < getmaxx(win_meta->pad))
200 for (y = 0; y < win_meta->height; y++)
201 mvwaddch(win_meta->pad, y, win_meta->pad_offset + win_meta->width - 1, '>' | A_REVERSE);
202 pnoutrefresh(win_meta->pad, 0, win_meta->pad_offset, 0, 0, win_meta->height, win_meta->width - 1); }
205 void resize_active_window (struct WinMeta * win_meta, uint16_t height, uint16_t width) {
206 // Grow or shrink currently active window. Correct its geometry and that of its followers.
207 if (0 != win_meta->active && width > 0 && height > 0 && height < win_meta->height) {
208 win_meta->active->height = height;
209 win_meta->active->width = width;
210 update_windows(win_meta, win_meta->chain_start); } }
212 void cycle_active_window (struct WinMeta * win_meta, char dir) {
213 // Cycle active window selection forwards (dir = 'n') or backwards.
214 if (0 != win_meta->active) {
216 if (win_meta->active->next != 0)
217 win_meta->active = win_meta->active->next;
219 win_meta->active = win_meta->chain_start; }
221 if (win_meta->active->prev != 0)
222 win_meta->active = win_meta->active->prev;
224 win_meta->active = win_meta->chain_end; } } }
226 void shift_active_window (struct WinMeta * win_meta, char dir) {
227 // Move active window forward/backward in window chain. If jumping beyond start/end, move to other chain end.
228 if (0 != win_meta->active && win_meta->chain_start != win_meta->chain_end && (dir == 'f' || dir == 'b')) {
229 struct Win * win_shift = win_meta->active;
231 if ((dir == 'f' && win_shift == win_meta->chain_end)
232 || (dir == 'b' && win_shift == win_meta->chain_start))
235 struct Win * win_p, * win_p_next;
236 for (i_max = 1, win_p = win_meta->chain_start; win_p != win_meta->chain_end; i_max++)
238 struct Win ** wins = malloc(i_max * sizeof(struct Win *));
239 for (i = 0, win_p = win_meta->chain_start; i < i_max; i++) {
240 win_p_next = win_p->next;
241 suspend_window(win_meta, win_p);
243 win_p = win_p_next; }
246 append_window(win_meta, win_shift);
247 for (i = 0; i < i_max - 1; i++)
248 append_window(win_meta, wins[i]); }
250 for (i = 1; i < i_max; i++)
251 append_window(win_meta, wins[i]);
252 append_window(win_meta, win_shift); }
254 for (i = 0; i < i_max; i++)
255 if ((dir == 'f' && win_shift == wins[i]) || (dir == 'b' && win_shift == wins[i+1])) {
256 append_window(win_meta, wins[i+1]);
257 append_window(win_meta, wins[i]);
260 append_window(win_meta, wins[i]);
262 win_meta->active = win_shift; } }