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path: root/scripts/kconfig/lxdialog/textbox.c
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-rw-r--r--scripts/kconfig/lxdialog/textbox.c298
1 files changed, 64 insertions, 234 deletions
diff --git a/scripts/kconfig/lxdialog/textbox.c b/scripts/kconfig/lxdialog/textbox.c
index 336793b03954..86b0770b0387 100644
--- a/scripts/kconfig/lxdialog/textbox.c
+++ b/scripts/kconfig/lxdialog/textbox.c
@@ -27,54 +27,27 @@ static void print_line(WINDOW * win, int row, int width);
27static char *get_line(void); 27static char *get_line(void);
28static void print_position(WINDOW * win, int height, int width); 28static void print_position(WINDOW * win, int height, int width);
29 29
30static int hscroll, fd, file_size, bytes_read; 30static int hscroll;
31static int begin_reached = 1, end_reached, page_length; 31static int begin_reached, end_reached, page_length;
32static char *buf, *page; 32static const char *buf;
33static const char *page;
33 34
34/* 35/*
35 * Display text from a file in a dialog box. 36 * Display text from a file in a dialog box.
36 */ 37 */
37int dialog_textbox(const char *title, const char *file, int height, int width) 38int dialog_textbox(const char *title, const char *tbuf, int height, int width)
38{ 39{
39 int i, x, y, cur_x, cur_y, fpos, key = 0; 40 int i, x, y, cur_x, cur_y, key = 0;
41 int texth, textw;
40 int passed_end; 42 int passed_end;
41 char search_term[MAX_LEN + 1];
42 WINDOW *dialog, *text; 43 WINDOW *dialog, *text;
43 44
44 search_term[0] = '\0'; /* no search term entered yet */ 45 begin_reached = 1;
45 46 end_reached = 0;
46 /* Open input file for reading */ 47 page_length = 0;
47 if ((fd = open(file, O_RDONLY)) == -1) { 48 hscroll = 0;
48 endwin(); 49 buf = tbuf;
49 fprintf(stderr, "\nCan't open input file in dialog_textbox().\n"); 50 page = buf; /* page is pointer to start of page to be displayed */
50 exit(-1);
51 }
52 /* Get file size. Actually, 'file_size' is the real file size - 1,
53 since it's only the last byte offset from the beginning */
54 if ((file_size = lseek(fd, 0, SEEK_END)) == -1) {
55 endwin();
56 fprintf(stderr, "\nError getting file size in dialog_textbox().\n");
57 exit(-1);
58 }
59 /* Restore file pointer to beginning of file after getting file size */
60 if (lseek(fd, 0, SEEK_SET) == -1) {
61 endwin();
62 fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
63 exit(-1);
64 }
65 /* Allocate space for read buffer */
66 if ((buf = malloc(BUF_SIZE + 1)) == NULL) {
67 endwin();
68 fprintf(stderr, "\nCan't allocate memory in dialog_textbox().\n");
69 exit(-1);
70 }
71 if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
72 endwin();
73 fprintf(stderr, "\nError reading file in dialog_textbox().\n");
74 exit(-1);
75 }
76 buf[bytes_read] = '\0'; /* mark end of valid data */
77 page = buf; /* page is pointer to start of page to be displayed */
78 51
79 /* center dialog box on screen */ 52 /* center dialog box on screen */
80 x = (COLS - width) / 2; 53 x = (COLS - width) / 2;
@@ -86,7 +59,9 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
86 keypad(dialog, TRUE); 59 keypad(dialog, TRUE);
87 60
88 /* Create window for text region, used for scrolling text */ 61 /* Create window for text region, used for scrolling text */
89 text = subwin(dialog, height - 4, width - 2, y + 1, x + 1); 62 texth = height - 4;
63 textw = width - 2;
64 text = subwin(dialog, texth, textw, y + 1, x + 1);
90 wattrset(text, dlg.dialog.atr); 65 wattrset(text, dlg.dialog.atr);
91 wbkgdset(text, dlg.dialog.atr & A_COLOR); 66 wbkgdset(text, dlg.dialog.atr & A_COLOR);
92 67
@@ -111,8 +86,8 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
111 getyx(dialog, cur_y, cur_x); /* Save cursor position */ 86 getyx(dialog, cur_y, cur_x); /* Save cursor position */
112 87
113 /* Print first page of text */ 88 /* Print first page of text */
114 attr_clear(text, height - 4, width - 2, dlg.dialog.atr); 89 attr_clear(text, texth, textw, dlg.dialog.atr);
115 print_page(text, height - 4, width - 2); 90 print_page(text, texth, textw);
116 print_position(dialog, height, width); 91 print_position(dialog, height, width);
117 wmove(dialog, cur_y, cur_x); /* Restore cursor position */ 92 wmove(dialog, cur_y, cur_x); /* Restore cursor position */
118 wrefresh(dialog); 93 wrefresh(dialog);
@@ -124,37 +99,15 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
124 case 'e': 99 case 'e':
125 case 'X': 100 case 'X':
126 case 'x': 101 case 'x':
102 delwin(text);
127 delwin(dialog); 103 delwin(dialog);
128 free(buf);
129 close(fd);
130 return 0; 104 return 0;
131 case 'g': /* First page */ 105 case 'g': /* First page */
132 case KEY_HOME: 106 case KEY_HOME:
133 if (!begin_reached) { 107 if (!begin_reached) {
134 begin_reached = 1; 108 begin_reached = 1;
135 /* First page not in buffer? */
136 if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
137 endwin();
138 fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
139 exit(-1);
140 }
141 if (fpos > bytes_read) { /* Yes, we have to read it in */
142 if (lseek(fd, 0, SEEK_SET) == -1) {
143 endwin();
144 fprintf(stderr, "\nError moving file pointer in "
145 "dialog_textbox().\n");
146 exit(-1);
147 }
148 if ((bytes_read =
149 read(fd, buf, BUF_SIZE)) == -1) {
150 endwin();
151 fprintf(stderr, "\nError reading file in dialog_textbox().\n");
152 exit(-1);
153 }
154 buf[bytes_read] = '\0';
155 }
156 page = buf; 109 page = buf;
157 print_page(text, height - 4, width - 2); 110 print_page(text, texth, textw);
158 print_position(dialog, height, width); 111 print_position(dialog, height, width);
159 wmove(dialog, cur_y, cur_x); /* Restore cursor position */ 112 wmove(dialog, cur_y, cur_x); /* Restore cursor position */
160 wrefresh(dialog); 113 wrefresh(dialog);
@@ -164,29 +117,10 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
164 case KEY_END: 117 case KEY_END:
165 118
166 end_reached = 1; 119 end_reached = 1;
167 /* Last page not in buffer? */ 120 /* point to last char in buf */
168 if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) { 121 page = buf + strlen(buf);
169 endwin(); 122 back_lines(texth);
170 fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n"); 123 print_page(text, texth, textw);
171 exit(-1);
172 }
173 if (fpos < file_size) { /* Yes, we have to read it in */
174 if (lseek(fd, -BUF_SIZE, SEEK_END) == -1) {
175 endwin();
176 fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
177 exit(-1);
178 }
179 if ((bytes_read =
180 read(fd, buf, BUF_SIZE)) == -1) {
181 endwin();
182 fprintf(stderr, "\nError reading file in dialog_textbox().\n");
183 exit(-1);
184 }
185 buf[bytes_read] = '\0';
186 }
187 page = buf + bytes_read;
188 back_lines(height - 4);
189 print_page(text, height - 4, width - 2);
190 print_position(dialog, height, width); 124 print_position(dialog, height, width);
191 wmove(dialog, cur_y, cur_x); /* Restore cursor position */ 125 wmove(dialog, cur_y, cur_x); /* Restore cursor position */
192 wrefresh(dialog); 126 wrefresh(dialog);
@@ -197,20 +131,22 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
197 if (!begin_reached) { 131 if (!begin_reached) {
198 back_lines(page_length + 1); 132 back_lines(page_length + 1);
199 133
200 /* We don't call print_page() here but use scrolling to ensure 134 /* We don't call print_page() here but use
201 faster screen update. However, 'end_reached' and 135 * scrolling to ensure faster screen update.
202 'page_length' should still be updated, and 'page' should 136 * However, 'end_reached' and 'page_length'
203 point to start of next page. This is done by calling 137 * should still be updated, and 'page' should
204 get_line() in the following 'for' loop. */ 138 * point to start of next page. This is done
139 * by calling get_line() in the following
140 * 'for' loop. */
205 scrollok(text, TRUE); 141 scrollok(text, TRUE);
206 wscrl(text, -1); /* Scroll text region down one line */ 142 wscrl(text, -1); /* Scroll text region down one line */
207 scrollok(text, FALSE); 143 scrollok(text, FALSE);
208 page_length = 0; 144 page_length = 0;
209 passed_end = 0; 145 passed_end = 0;
210 for (i = 0; i < height - 4; i++) { 146 for (i = 0; i < texth; i++) {
211 if (!i) { 147 if (!i) {
212 /* print first line of page */ 148 /* print first line of page */
213 print_line(text, 0, width - 2); 149 print_line(text, 0, textw);
214 wnoutrefresh(text); 150 wnoutrefresh(text);
215 } else 151 } else
216 /* Called to update 'end_reached' and 'page' */ 152 /* Called to update 'end_reached' and 'page' */
@@ -231,8 +167,8 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
231 case KEY_PPAGE: 167 case KEY_PPAGE:
232 if (begin_reached) 168 if (begin_reached)
233 break; 169 break;
234 back_lines(page_length + height - 4); 170 back_lines(page_length + texth);
235 print_page(text, height - 4, width - 2); 171 print_page(text, texth, textw);
236 print_position(dialog, height, width); 172 print_position(dialog, height, width);
237 wmove(dialog, cur_y, cur_x); 173 wmove(dialog, cur_y, cur_x);
238 wrefresh(dialog); 174 wrefresh(dialog);
@@ -245,7 +181,7 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
245 scrollok(text, TRUE); 181 scrollok(text, TRUE);
246 scroll(text); /* Scroll text region up one line */ 182 scroll(text); /* Scroll text region up one line */
247 scrollok(text, FALSE); 183 scrollok(text, FALSE);
248 print_line(text, height - 5, width - 2); 184 print_line(text, texth - 1, textw);
249 wnoutrefresh(text); 185 wnoutrefresh(text);
250 print_position(dialog, height, width); 186 print_position(dialog, height, width);
251 wmove(dialog, cur_y, cur_x); /* Restore cursor position */ 187 wmove(dialog, cur_y, cur_x); /* Restore cursor position */
@@ -258,7 +194,7 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
258 break; 194 break;
259 195
260 begin_reached = 0; 196 begin_reached = 0;
261 print_page(text, height - 4, width - 2); 197 print_page(text, texth, textw);
262 print_position(dialog, height, width); 198 print_position(dialog, height, width);
263 wmove(dialog, cur_y, cur_x); 199 wmove(dialog, cur_y, cur_x);
264 wrefresh(dialog); 200 wrefresh(dialog);
@@ -276,7 +212,7 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
276 hscroll--; 212 hscroll--;
277 /* Reprint current page to scroll horizontally */ 213 /* Reprint current page to scroll horizontally */
278 back_lines(page_length); 214 back_lines(page_length);
279 print_page(text, height - 4, width - 2); 215 print_page(text, texth, textw);
280 wmove(dialog, cur_y, cur_x); 216 wmove(dialog, cur_y, cur_x);
281 wrefresh(dialog); 217 wrefresh(dialog);
282 break; 218 break;
@@ -288,7 +224,7 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
288 hscroll++; 224 hscroll++;
289 /* Reprint current page to scroll horizontally */ 225 /* Reprint current page to scroll horizontally */
290 back_lines(page_length); 226 back_lines(page_length);
291 print_page(text, height - 4, width - 2); 227 print_page(text, texth, textw);
292 wmove(dialog, cur_y, cur_x); 228 wmove(dialog, cur_y, cur_x);
293 wrefresh(dialog); 229 wrefresh(dialog);
294 break; 230 break;
@@ -296,123 +232,42 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
296 break; 232 break;
297 } 233 }
298 } 234 }
299 235 delwin(text);
300 delwin(dialog); 236 delwin(dialog);
301 free(buf); 237 return 255; /* ESC pressed */
302 close(fd);
303 return -1; /* ESC pressed */
304} 238}
305 239
306/* 240/*
307 * Go back 'n' lines in text file. Called by dialog_textbox(). 241 * Go back 'n' lines in text. Called by dialog_textbox().
308 * 'page' will be updated to point to the desired line in 'buf'. 242 * 'page' will be updated to point to the desired line in 'buf'.
309 */ 243 */
310static void back_lines(int n) 244static void back_lines(int n)
311{ 245{
312 int i, fpos; 246 int i;
313 247
314 begin_reached = 0; 248 begin_reached = 0;
315 /* We have to distinguish between end_reached and !end_reached 249 /* Go back 'n' lines */
316 since at end of file, the line is not ended by a '\n'. 250 for (i = 0; i < n; i++) {
317 The code inside 'if' basically does a '--page' to move one 251 if (*page == '\0') {
318 character backward so as to skip '\n' of the previous line */ 252 if (end_reached) {
319 if (!end_reached) { 253 end_reached = 0;
320 /* Either beginning of buffer or beginning of file reached? */ 254 continue;
321 if (page == buf) {
322 if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
323 endwin();
324 fprintf(stderr, "\nError moving file pointer in "
325 "back_lines().\n");
326 exit(-1);
327 }
328 if (fpos > bytes_read) { /* Not beginning of file yet */
329 /* We've reached beginning of buffer, but not beginning of
330 file yet, so read previous part of file into buffer.
331 Note that we only move backward for BUF_SIZE/2 bytes,
332 but not BUF_SIZE bytes to avoid re-reading again in
333 print_page() later */
334 /* Really possible to move backward BUF_SIZE/2 bytes? */
335 if (fpos < BUF_SIZE / 2 + bytes_read) {
336 /* No, move less then */
337 if (lseek(fd, 0, SEEK_SET) == -1) {
338 endwin();
339 fprintf(stderr, "\nError moving file pointer in "
340 "back_lines().\n");
341 exit(-1);
342 }
343 page = buf + fpos - bytes_read;
344 } else { /* Move backward BUF_SIZE/2 bytes */
345 if (lseek (fd, -(BUF_SIZE / 2 + bytes_read), SEEK_CUR) == -1) {
346 endwin();
347 fprintf(stderr, "\nError moving file pointer "
348 "in back_lines().\n");
349 exit(-1);
350 }
351 page = buf + BUF_SIZE / 2;
352 }
353 if ((bytes_read =
354 read(fd, buf, BUF_SIZE)) == -1) {
355 endwin();
356 fprintf(stderr, "\nError reading file in back_lines().\n");
357 exit(-1);
358 }
359 buf[bytes_read] = '\0';
360 } else { /* Beginning of file reached */
361 begin_reached = 1;
362 return;
363 } 255 }
364 } 256 }
365 if (*(--page) != '\n') { /* '--page' here */ 257 if (page == buf) {
366 /* Something's wrong... */ 258 begin_reached = 1;
367 endwin(); 259 return;
368 fprintf(stderr, "\nInternal error in back_lines().\n");
369 exit(-1);
370 } 260 }
371 } 261 page--;
372 /* Go back 'n' lines */
373 for (i = 0; i < n; i++)
374 do { 262 do {
375 if (page == buf) { 263 if (page == buf) {
376 if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) { 264 begin_reached = 1;
377 endwin(); 265 return;
378 fprintf(stderr, "\nError moving file pointer in back_lines().\n");
379 exit(-1);
380 }
381 if (fpos > bytes_read) {
382 /* Really possible to move backward BUF_SIZE/2 bytes? */
383 if (fpos < BUF_SIZE / 2 + bytes_read) {
384 /* No, move less then */
385 if (lseek(fd, 0, SEEK_SET) == -1) {
386 endwin();
387 fprintf(stderr, "\nError moving file pointer "
388 "in back_lines().\n");
389 exit(-1);
390 }
391 page = buf + fpos - bytes_read;
392 } else { /* Move backward BUF_SIZE/2 bytes */
393 if (lseek (fd, -(BUF_SIZE / 2 + bytes_read), SEEK_CUR) == -1) {
394 endwin();
395 fprintf(stderr, "\nError moving file pointer"
396 " in back_lines().\n");
397 exit(-1);
398 }
399 page = buf + BUF_SIZE / 2;
400 }
401 if ((bytes_read =
402 read(fd, buf, BUF_SIZE)) == -1) {
403 endwin();
404 fprintf(stderr, "\nError reading file in "
405 "back_lines().\n");
406 exit(-1);
407 }
408 buf[bytes_read] = '\0';
409 } else { /* Beginning of file reached */
410 begin_reached = 1;
411 return;
412 }
413 } 266 }
414 } while (*(--page) != '\n'); 267 page--;
415 page++; 268 } while (*page != '\n');
269 page++;
270 }
416} 271}
417 272
418/* 273/*
@@ -467,33 +322,14 @@ static void print_line(WINDOW * win, int row, int width)
467 */ 322 */
468static char *get_line(void) 323static char *get_line(void)
469{ 324{
470 int i = 0, fpos; 325 int i = 0;
471 static char line[MAX_LEN + 1]; 326 static char line[MAX_LEN + 1];
472 327
473 end_reached = 0; 328 end_reached = 0;
474 while (*page != '\n') { 329 while (*page != '\n') {
475 if (*page == '\0') { 330 if (*page == '\0') {
476 /* Either end of file or end of buffer reached */ 331 if (!end_reached) {
477 if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) { 332 end_reached = 1;
478 endwin();
479 fprintf(stderr, "\nError moving file pointer in "
480 "get_line().\n");
481 exit(-1);
482 }
483 if (fpos < file_size) { /* Not end of file yet */
484 /* We've reached end of buffer, but not end of file yet,
485 so read next part of file into buffer */
486 if ((bytes_read =
487 read(fd, buf, BUF_SIZE)) == -1) {
488 endwin();
489 fprintf(stderr, "\nError reading file in get_line().\n");
490 exit(-1);
491 }
492 buf[bytes_read] = '\0';
493 page = buf;
494 } else {
495 if (!end_reached)
496 end_reached = 1;
497 break; 333 break;
498 } 334 }
499 } else if (i < MAX_LEN) 335 } else if (i < MAX_LEN)
@@ -518,17 +354,11 @@ static char *get_line(void)
518 */ 354 */
519static void print_position(WINDOW * win, int height, int width) 355static void print_position(WINDOW * win, int height, int width)
520{ 356{
521 int fpos, percent; 357 int percent;
522 358
523 if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
524 endwin();
525 fprintf(stderr, "\nError moving file pointer in print_position().\n");
526 exit(-1);
527 }
528 wattrset(win, dlg.position_indicator.atr); 359 wattrset(win, dlg.position_indicator.atr);
529 wbkgdset(win, dlg.position_indicator.atr & A_COLOR); 360 wbkgdset(win, dlg.position_indicator.atr & A_COLOR);
530 percent = !file_size ? 361 percent = (page - buf) * 100 / strlen(buf);
531 100 : ((fpos - bytes_read + page - buf) * 100) / file_size;
532 wmove(win, height - 3, width - 9); 362 wmove(win, height - 3, width - 9);
533 wprintw(win, "(%3d%%)", percent); 363 wprintw(win, "(%3d%%)", percent);
534} 364}
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