1 /*
2 * $Id: arrows.c,v 1.54 2022/04/03 22:38:16 tom Exp $
3 *
4 * arrows.c -- draw arrows to indicate end-of-range for lists
5 *
6 * Copyright 2000-2019,2022 Thomas E. Dickey
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU Lesser General Public License, version 2.1
10 * as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this program; if not, write to
19 * Free Software Foundation, Inc.
20 * 51 Franklin St., Fifth Floor
21 * Boston, MA 02110, USA.
22 */
23
24 #include <dlg_internals.h>
25
26 #ifdef USE_WIDE_CURSES
27 #if defined(CURSES_WACS_ARRAY) && !defined(CURSES_WACS_SYMBOLS)
28 /* workaround for NetBSD 5.1 curses */
29 #undef WACS_DARROW
30 #undef WACS_UARROW
31 #define WACS_DARROW &(CURSES_WACS_ARRAY['.'])
32 #define WACS_UARROW &(CURSES_WACS_ARRAY['-'])
33 #endif
34 #define add_acs(win, code) wadd_wch(win, W ## code)
35 #else
36 #define add_acs(win, code) waddch(win, dlg_boxchar(code))
37 #endif
38
39 /* size of decorations */
40 #define ON_LEFT 4
41 #define ON_RIGHT 3
42
43 #ifdef HAVE_COLOR
44 static chtype
merge_colors(chtype foreground,chtype background)45 merge_colors(chtype foreground, chtype background)
46 {
47 chtype result = foreground;
48 if ((foreground & A_COLOR) != (background & A_COLOR)) {
49 short fg_f, bg_f;
50 short fg_b, bg_b;
51 short fg_pair = (short) PAIR_NUMBER(foreground);
52 short bg_pair = (short) PAIR_NUMBER(background);
53
54 if (pair_content(fg_pair, &fg_f, &bg_f) != ERR
55 && pair_content(bg_pair, &fg_b, &bg_b) != ERR) {
56 result &= ~A_COLOR;
57 result |= dlg_color_pair(fg_f, bg_b);
58 }
59 }
60 return result;
61 }
62 #else
63 #define merge_colors(f,b) (f)
64 #endif
65
66 /*
67 * If we have help-line text, e.g., from "--hline", draw it between the other
68 * decorations at the bottom of the dialog window.
69 */
70 void
dlg_draw_helpline(WINDOW * win,bool decorations)71 dlg_draw_helpline(WINDOW *win, bool decorations)
72 {
73 int bottom;
74
75 if (dialog_vars.help_line != 0
76 && dialog_vars.help_line[0] != 0
77 && (bottom = getmaxy(win) - 1) > 0) {
78 chtype attr = A_NORMAL;
79 int cols = dlg_count_columns(dialog_vars.help_line);
80 int other = decorations ? (ON_LEFT + ON_RIGHT) : 0;
81 int avail = (getmaxx(win) - other - 2);
82 int limit = dlg_count_real_columns(dialog_vars.help_line) + 2;
83
84 if (limit < avail) {
85 int cur_x, cur_y;
86
87 getyx(win, cur_y, cur_x);
88 other = decorations ? ON_LEFT : 0;
89 (void) wmove(win, bottom, other + (avail - limit) / 2);
90 waddch(win, '[');
91 dlg_print_text(win, dialog_vars.help_line, cols, &attr);
92 waddch(win, ']');
93 wmove(win, cur_y, cur_x);
94 }
95 }
96 }
97
98 void
dlg_draw_arrows2(WINDOW * win,int top_arrow,int bottom_arrow,int x,int top,int bottom,chtype attr,chtype borderattr)99 dlg_draw_arrows2(WINDOW *win,
100 int top_arrow,
101 int bottom_arrow,
102 int x,
103 int top,
104 int bottom,
105 chtype attr,
106 chtype borderattr)
107 {
108 chtype save = dlg_get_attrs(win);
109 int cur_x, cur_y;
110 int limit_x = getmaxx(win);
111 bool draw_top = TRUE;
112 bool is_toplevel = (wgetparent(win) == stdscr);
113
114 getyx(win, cur_y, cur_x);
115
116 /*
117 * If we're drawing a centered title, do not overwrite with the arrows.
118 */
119 if (dialog_vars.title && is_toplevel && (top - getbegy(win)) < MARGIN) {
120 int have = (limit_x - dlg_count_columns(dialog_vars.title)) / 2;
121 int need = x + 5;
122 if (need > have)
123 draw_top = FALSE;
124 }
125
126 if (draw_top) {
127 (void) wmove(win, top, x);
128 if (top_arrow) {
129 dlg_attrset(win, merge_colors(uarrow_attr, attr));
130 (void) add_acs(win, ACS_UARROW);
131 (void) waddstr(win, "(-)");
132 } else {
133 dlg_attrset(win, attr);
134 (void) whline(win, dlg_boxchar(ACS_HLINE), ON_LEFT);
135 }
136 }
137 mouse_mkbutton(top, x - 1, 6, KEY_PPAGE);
138
139 (void) wmove(win, bottom, x);
140 if (bottom_arrow) {
141 dlg_attrset(win, merge_colors(darrow_attr, borderattr));
142 (void) add_acs(win, ACS_DARROW);
143 (void) waddstr(win, "(+)");
144 } else {
145 dlg_attrset(win, borderattr);
146 (void) whline(win, dlg_boxchar(ACS_HLINE), ON_LEFT);
147 }
148 mouse_mkbutton(bottom, x - 1, 6, KEY_NPAGE);
149
150 (void) wmove(win, cur_y, cur_x);
151 wrefresh(win);
152
153 dlg_attrset(win, save);
154 }
155
156 void
dlg_draw_scrollbar(WINDOW * win,long first_data,long this_data,long next_data,long total_data,int left,int right,int top,int bottom,chtype attr,chtype borderattr)157 dlg_draw_scrollbar(WINDOW *win,
158 long first_data,
159 long this_data,
160 long next_data,
161 long total_data,
162 int left,
163 int right,
164 int top,
165 int bottom,
166 chtype attr,
167 chtype borderattr)
168 {
169 int oldy, oldx;
170
171 chtype save = dlg_get_attrs(win);
172 int top_arrow = (first_data != 0);
173 int bottom_arrow = (next_data < total_data);
174
175 getyx(win, oldy, oldx);
176
177 dlg_draw_helpline(win, TRUE);
178 if (bottom_arrow || top_arrow || dialog_state.use_scrollbar) {
179 char buffer[80];
180 int percent;
181 int len;
182
183 percent = (!total_data
184 ? 100
185 : (int) ((next_data * 100)
186 / total_data));
187
188 if (percent < 0)
189 percent = 0;
190 else if (percent > 100)
191 percent = 100;
192
193 dlg_attrset(win, position_indicator_attr);
194 (void) sprintf(buffer, "%d%%", percent);
195 (void) wmove(win, bottom, right - 7);
196 (void) waddstr(win, buffer);
197 if ((len = dlg_count_columns(buffer)) < 4) {
198 dlg_attrset(win, border_attr);
199 whline(win, dlg_boxchar(ACS_HLINE), 4 - len);
200 }
201 }
202 #define BARSIZE(num) (int) (0.5 + (double) ((all_high * (int) (num)) / (double) total_data))
203 #define ORDSIZE(num) (int) ((double) ((all_high * (int) (num)) / (double) all_diff))
204
205 if (dialog_state.use_scrollbar) {
206 int all_high = (bottom - top - 1);
207
208 this_data = MAX(0, this_data);
209
210 if (total_data > 0 && all_high > 0) {
211 int all_diff = (int) (total_data + 1);
212 int bar_diff = (int) (next_data + 1 - this_data);
213 int bar_high;
214
215 bar_high = ORDSIZE(bar_diff);
216 if (bar_high <= 0)
217 bar_high = 1;
218
219 if (bar_high < all_high) {
220 int bar_last = BARSIZE(next_data);
221 int bar_y;
222
223 wmove(win, top + 1, right);
224
225 dlg_attrset(win, save);
226 wvline(win, ACS_VLINE | A_REVERSE, all_high);
227
228 bar_y = ORDSIZE(this_data);
229 if (bar_y >= bar_last && bar_y > 0)
230 bar_y = bar_last - 1;
231 if (bar_last - bar_y > bar_high && bar_high > 1)
232 ++bar_y;
233 bar_last = MIN(bar_last, all_high);
234
235 wmove(win, top + 1 + bar_y, right);
236
237 dlg_attrset(win, position_indicator_attr);
238 dlg_attron(win, A_REVERSE);
239 #if defined(WACS_BLOCK) && defined(NCURSES_VERSION) && defined(USE_WIDE_CURSES)
240 wvline_set(win, WACS_BLOCK, bar_last - bar_y);
241 #else
242 wvline(win, ACS_BLOCK, bar_last - bar_y);
243 #endif
244 }
245 }
246 }
247 dlg_draw_arrows2(win,
248 top_arrow,
249 bottom_arrow,
250 left + ARROWS_COL,
251 top,
252 bottom,
253 attr,
254 borderattr);
255
256 dlg_attrset(win, save);
257 wmove(win, oldy, oldx);
258 }
259
260 void
dlg_draw_arrows(WINDOW * win,int top_arrow,int bottom_arrow,int x,int top,int bottom)261 dlg_draw_arrows(WINDOW *win,
262 int top_arrow,
263 int bottom_arrow,
264 int x,
265 int top,
266 int bottom)
267 {
268 dlg_draw_helpline(win, TRUE);
269 dlg_draw_arrows2(win,
270 top_arrow,
271 bottom_arrow,
272 x,
273 top,
274 bottom,
275 menubox_border2_attr,
276 menubox_border_attr);
277 }
278