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Diffstat (limited to 'scripts/kconfig/lxdialog/textbox.c')
-rw-r--r--scripts/kconfig/lxdialog/textbox.c416
1 files changed, 137 insertions, 279 deletions
diff --git a/scripts/kconfig/lxdialog/textbox.c b/scripts/kconfig/lxdialog/textbox.c
index 77848bb..fabfc1a 100644
--- a/scripts/kconfig/lxdialog/textbox.c
+++ b/scripts/kconfig/lxdialog/textbox.c
@@ -25,56 +25,62 @@ static void back_lines(int n);
static void print_page(WINDOW * win, int height, int width);
static void print_line(WINDOW * win, int row, int width);
static char *get_line(void);
-static void print_position(WINDOW * win, int height, int width);
+static void print_position(WINDOW * win);
+
+static int hscroll;
+static int begin_reached, end_reached, page_length;
+static const char *buf;
+static const char *page;
+
+/*
+ * refresh window content
+ */
+static void refresh_text_box(WINDOW *dialog, WINDOW *box, int boxh, int boxw,
+ int cur_y, int cur_x)
+{
+ print_page(box, boxh, boxw);
+ print_position(dialog);
+ wmove(dialog, cur_y, cur_x); /* Restore cursor position */
+ wrefresh(dialog);
+}
-static int hscroll, fd, file_size, bytes_read;
-static int begin_reached = 1, end_reached, page_length;
-static char *buf, *page;
/*
* Display text from a file in a dialog box.
*/
-int dialog_textbox(const char *title, const char *file, int height, int width)
+int dialog_textbox(const char *title, const char *tbuf,
+ int initial_height, int initial_width)
{
- int i, x, y, cur_x, cur_y, fpos, key = 0;
+ int i, x, y, cur_x, cur_y, key = 0;
+ int height, width, boxh, boxw;
int passed_end;
- char search_term[MAX_LEN + 1];
- WINDOW *dialog, *text;
-
- search_term[0] = '\0'; /* no search term entered yet */
+ WINDOW *dialog, *box;
- /* Open input file for reading */
- if ((fd = open(file, O_RDONLY)) == -1) {
- endwin();
- fprintf(stderr, "\nCan't open input file in dialog_textbox().\n");
- exit(-1);
- }
- /* Get file size. Actually, 'file_size' is the real file size - 1,
- since it's only the last byte offset from the beginning */
- if ((file_size = lseek(fd, 0, SEEK_END)) == -1) {
- endwin();
- fprintf(stderr, "\nError getting file size in dialog_textbox().\n");
- exit(-1);
- }
- /* Restore file pointer to beginning of file after getting file size */
- if (lseek(fd, 0, SEEK_SET) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
- exit(-1);
- }
- /* Allocate space for read buffer */
- if ((buf = malloc(BUF_SIZE + 1)) == NULL) {
- endwin();
- fprintf(stderr, "\nCan't allocate memory in dialog_textbox().\n");
- exit(-1);
- }
- if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
- endwin();
- fprintf(stderr, "\nError reading file in dialog_textbox().\n");
- exit(-1);
- }
- buf[bytes_read] = '\0'; /* mark end of valid data */
- page = buf; /* page is pointer to start of page to be displayed */
+ begin_reached = 1;
+ end_reached = 0;
+ page_length = 0;
+ hscroll = 0;
+ buf = tbuf;
+ page = buf; /* page is pointer to start of page to be displayed */
+
+do_resize:
+ getmaxyx(stdscr, height, width);
+ if (height < 8 || width < 8)
+ return -ERRDISPLAYTOOSMALL;
+ if (initial_height != 0)
+ height = initial_height;
+ else
+ if (height > 4)
+ height -= 4;
+ else
+ height = 0;
+ if (initial_width != 0)
+ width = initial_width;
+ else
+ if (width > 5)
+ width -= 5;
+ else
+ width = 0;
/* center dialog box on screen */
x = (COLS - width) / 2;
@@ -85,22 +91,25 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
dialog = newwin(height, width, y, x);
keypad(dialog, TRUE);
- /* Create window for text region, used for scrolling text */
- text = subwin(dialog, height - 4, width - 2, y + 1, x + 1);
- wattrset(text, dialog_attr);
- wbkgdset(text, dialog_attr & A_COLOR);
+ /* Create window for box region, used for scrolling text */
+ boxh = height - 4;
+ boxw = width - 2;
+ box = subwin(dialog, boxh, boxw, y + 1, x + 1);
+ wattrset(box, dlg.dialog.atr);
+ wbkgdset(box, dlg.dialog.atr & A_COLOR);
- keypad(text, TRUE);
+ keypad(box, TRUE);
/* register the new window, along with its borders */
- draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
+ draw_box(dialog, 0, 0, height, width,
+ dlg.dialog.atr, dlg.border.atr);
- wattrset(dialog, border_attr);
+ wattrset(dialog, dlg.border.atr);
mvwaddch(dialog, height - 3, 0, ACS_LTEE);
for (i = 0; i < width - 2; i++)
waddch(dialog, ACS_HLINE);
- wattrset(dialog, dialog_attr);
- wbkgdset(dialog, dialog_attr & A_COLOR);
+ wattrset(dialog, dlg.dialog.atr);
+ wbkgdset(dialog, dlg.dialog.atr & A_COLOR);
waddch(dialog, ACS_RTEE);
print_title(dialog, title, width);
@@ -110,85 +119,37 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
getyx(dialog, cur_y, cur_x); /* Save cursor position */
/* Print first page of text */
- attr_clear(text, height - 4, width - 2, dialog_attr);
- print_page(text, height - 4, width - 2);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
+ attr_clear(box, boxh, boxw, dlg.dialog.atr);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y, cur_x);
- while ((key != ESC) && (key != '\n')) {
+ while ((key != KEY_ESC) && (key != '\n')) {
key = wgetch(dialog);
switch (key) {
case 'E': /* Exit */
case 'e':
case 'X':
case 'x':
+ delwin(box);
delwin(dialog);
- free(buf);
- close(fd);
return 0;
case 'g': /* First page */
case KEY_HOME:
if (!begin_reached) {
begin_reached = 1;
- /* First page not in buffer? */
- if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
- exit(-1);
- }
- if (fpos > bytes_read) { /* Yes, we have to read it in */
- if (lseek(fd, 0, SEEK_SET) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in "
- "dialog_textbox().\n");
- exit(-1);
- }
- if ((bytes_read =
- read(fd, buf, BUF_SIZE)) == -1) {
- endwin();
- fprintf(stderr, "\nError reading file in dialog_textbox().\n");
- exit(-1);
- }
- buf[bytes_read] = '\0';
- }
page = buf;
- print_page(text, height - 4, width - 2);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
+ refresh_text_box(dialog, box, boxh, boxw,
+ cur_y, cur_x);
}
break;
case 'G': /* Last page */
case KEY_END:
end_reached = 1;
- /* Last page not in buffer? */
- if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
- exit(-1);
- }
- if (fpos < file_size) { /* Yes, we have to read it in */
- if (lseek(fd, -BUF_SIZE, SEEK_END) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
- exit(-1);
- }
- if ((bytes_read =
- read(fd, buf, BUF_SIZE)) == -1) {
- endwin();
- fprintf(stderr, "\nError reading file in dialog_textbox().\n");
- exit(-1);
- }
- buf[bytes_read] = '\0';
- }
- page = buf + bytes_read;
- back_lines(height - 4);
- print_page(text, height - 4, width - 2);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
+ /* point to last char in buf */
+ page = buf + strlen(buf);
+ back_lines(boxh);
+ refresh_text_box(dialog, box, boxh, boxw,
+ cur_y, cur_x);
break;
case 'K': /* Previous line */
case 'k':
@@ -196,21 +157,23 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
if (!begin_reached) {
back_lines(page_length + 1);
- /* We don't call print_page() here but use scrolling to ensure
- faster screen update. However, 'end_reached' and
- 'page_length' should still be updated, and 'page' should
- point to start of next page. This is done by calling
- get_line() in the following 'for' loop. */
- scrollok(text, TRUE);
- wscrl(text, -1); /* Scroll text region down one line */
- scrollok(text, FALSE);
+ /* We don't call print_page() here but use
+ * scrolling to ensure faster screen update.
+ * However, 'end_reached' and 'page_length'
+ * should still be updated, and 'page' should
+ * point to start of next page. This is done
+ * by calling get_line() in the following
+ * 'for' loop. */
+ scrollok(box, TRUE);
+ wscrl(box, -1); /* Scroll box region down one line */
+ scrollok(box, FALSE);
page_length = 0;
passed_end = 0;
- for (i = 0; i < height - 4; i++) {
+ for (i = 0; i < boxh; i++) {
if (!i) {
/* print first line of page */
- print_line(text, 0, width - 2);
- wnoutrefresh(text);
+ print_line(box, 0, boxw);
+ wnoutrefresh(box);
} else
/* Called to update 'end_reached' and 'page' */
get_line();
@@ -220,7 +183,7 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
passed_end = 1;
}
- print_position(dialog, height, width);
+ print_position(dialog);
wmove(dialog, cur_y, cur_x); /* Restore cursor position */
wrefresh(dialog);
}
@@ -230,23 +193,21 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
case KEY_PPAGE:
if (begin_reached)
break;
- back_lines(page_length + height - 4);
- print_page(text, height - 4, width - 2);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x);
- wrefresh(dialog);
+ back_lines(page_length + boxh);
+ refresh_text_box(dialog, box, boxh, boxw,
+ cur_y, cur_x);
break;
case 'J': /* Next line */
case 'j':
case KEY_DOWN:
if (!end_reached) {
begin_reached = 0;
- scrollok(text, TRUE);
- scroll(text); /* Scroll text region up one line */
- scrollok(text, FALSE);
- print_line(text, height - 5, width - 2);
- wnoutrefresh(text);
- print_position(dialog, height, width);
+ scrollok(box, TRUE);
+ scroll(box); /* Scroll box region up one line */
+ scrollok(box, FALSE);
+ print_line(box, boxh - 1, boxw);
+ wnoutrefresh(box);
+ print_position(dialog);
wmove(dialog, cur_y, cur_x); /* Restore cursor position */
wrefresh(dialog);
}
@@ -257,10 +218,8 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
break;
begin_reached = 0;
- print_page(text, height - 4, width - 2);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x);
- wrefresh(dialog);
+ refresh_text_box(dialog, box, boxh, boxw,
+ cur_y, cur_x);
break;
case '0': /* Beginning of line */
case 'H': /* Scroll left */
@@ -275,9 +234,8 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
hscroll--;
/* Reprint current page to scroll horizontally */
back_lines(page_length);
- print_page(text, height - 4, width - 2);
- wmove(dialog, cur_y, cur_x);
- wrefresh(dialog);
+ refresh_text_box(dialog, box, boxh, boxw,
+ cur_y, cur_x);
break;
case 'L': /* Scroll right */
case 'l':
@@ -287,131 +245,56 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
hscroll++;
/* Reprint current page to scroll horizontally */
back_lines(page_length);
- print_page(text, height - 4, width - 2);
- wmove(dialog, cur_y, cur_x);
- wrefresh(dialog);
+ refresh_text_box(dialog, box, boxh, boxw,
+ cur_y, cur_x);
break;
- case ESC:
+ case KEY_ESC:
+ key = on_key_esc(dialog);
break;
+ case KEY_RESIZE:
+ back_lines(height);
+ delwin(box);
+ delwin(dialog);
+ on_key_resize();
+ goto do_resize;
}
}
-
+ delwin(box);
delwin(dialog);
- free(buf);
- close(fd);
- return -1; /* ESC pressed */
+ return key; /* ESC pressed */
}
/*
- * Go back 'n' lines in text file. Called by dialog_textbox().
+ * Go back 'n' lines in text. Called by dialog_textbox().
* 'page' will be updated to point to the desired line in 'buf'.
*/
static void back_lines(int n)
{
- int i, fpos;
+ int i;
begin_reached = 0;
- /* We have to distinguish between end_reached and !end_reached
- since at end of file, the line is not ended by a '\n'.
- The code inside 'if' basically does a '--page' to move one
- character backward so as to skip '\n' of the previous line */
- if (!end_reached) {
- /* Either beginning of buffer or beginning of file reached? */
- if (page == buf) {
- if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in "
- "back_lines().\n");
- exit(-1);
- }
- if (fpos > bytes_read) { /* Not beginning of file yet */
- /* We've reached beginning of buffer, but not beginning of
- file yet, so read previous part of file into buffer.
- Note that we only move backward for BUF_SIZE/2 bytes,
- but not BUF_SIZE bytes to avoid re-reading again in
- print_page() later */
- /* Really possible to move backward BUF_SIZE/2 bytes? */
- if (fpos < BUF_SIZE / 2 + bytes_read) {
- /* No, move less then */
- if (lseek(fd, 0, SEEK_SET) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in "
- "back_lines().\n");
- exit(-1);
- }
- page = buf + fpos - bytes_read;
- } else { /* Move backward BUF_SIZE/2 bytes */
- if (lseek (fd, -(BUF_SIZE / 2 + bytes_read), SEEK_CUR) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer "
- "in back_lines().\n");
- exit(-1);
- }
- page = buf + BUF_SIZE / 2;
- }
- if ((bytes_read =
- read(fd, buf, BUF_SIZE)) == -1) {
- endwin();
- fprintf(stderr, "\nError reading file in back_lines().\n");
- exit(-1);
- }
- buf[bytes_read] = '\0';
- } else { /* Beginning of file reached */
- begin_reached = 1;
- return;
+ /* Go back 'n' lines */
+ for (i = 0; i < n; i++) {
+ if (*page == '\0') {
+ if (end_reached) {
+ end_reached = 0;
+ continue;
}
}
- if (*(--page) != '\n') { /* '--page' here */
- /* Something's wrong... */
- endwin();
- fprintf(stderr, "\nInternal error in back_lines().\n");
- exit(-1);
+ if (page == buf) {
+ begin_reached = 1;
+ return;
}
- }
- /* Go back 'n' lines */
- for (i = 0; i < n; i++)
+ page--;
do {
if (page == buf) {
- if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in back_lines().\n");
- exit(-1);
- }
- if (fpos > bytes_read) {
- /* Really possible to move backward BUF_SIZE/2 bytes? */
- if (fpos < BUF_SIZE / 2 + bytes_read) {
- /* No, move less then */
- if (lseek(fd, 0, SEEK_SET) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer "
- "in back_lines().\n");
- exit(-1);
- }
- page = buf + fpos - bytes_read;
- } else { /* Move backward BUF_SIZE/2 bytes */
- if (lseek (fd, -(BUF_SIZE / 2 + bytes_read), SEEK_CUR) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer"
- " in back_lines().\n");
- exit(-1);
- }
- page = buf + BUF_SIZE / 2;
- }
- if ((bytes_read =
- read(fd, buf, BUF_SIZE)) == -1) {
- endwin();
- fprintf(stderr, "\nError reading file in "
- "back_lines().\n");
- exit(-1);
- }
- buf[bytes_read] = '\0';
- } else { /* Beginning of file reached */
- begin_reached = 1;
- return;
- }
+ begin_reached = 1;
+ return;
}
- } while (*(--page) != '\n');
- page++;
+ page--;
+ } while (*page != '\n');
+ page++;
+ }
}
/*
@@ -466,33 +349,14 @@ static void print_line(WINDOW * win, int row, int width)
*/
static char *get_line(void)
{
- int i = 0, fpos;
+ int i = 0;
static char line[MAX_LEN + 1];
end_reached = 0;
while (*page != '\n') {
if (*page == '\0') {
- /* Either end of file or end of buffer reached */
- if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in "
- "get_line().\n");
- exit(-1);
- }
- if (fpos < file_size) { /* Not end of file yet */
- /* We've reached end of buffer, but not end of file yet,
- so read next part of file into buffer */
- if ((bytes_read =
- read(fd, buf, BUF_SIZE)) == -1) {
- endwin();
- fprintf(stderr, "\nError reading file in get_line().\n");
- exit(-1);
- }
- buf[bytes_read] = '\0';
- page = buf;
- } else {
- if (!end_reached)
- end_reached = 1;
+ if (!end_reached) {
+ end_reached = 1;
break;
}
} else if (i < MAX_LEN)
@@ -515,19 +379,13 @@ static char *get_line(void)
/*
* Print current position
*/
-static void print_position(WINDOW * win, int height, int width)
+static void print_position(WINDOW * win)
{
- int fpos, percent;
+ int percent;
- if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in print_position().\n");
- exit(-1);
- }
- wattrset(win, position_indicator_attr);
- wbkgdset(win, position_indicator_attr & A_COLOR);
- percent = !file_size ?
- 100 : ((fpos - bytes_read + page - buf) * 100) / file_size;
- wmove(win, height - 3, width - 9);
+ wattrset(win, dlg.position_indicator.atr);
+ wbkgdset(win, dlg.position_indicator.atr & A_COLOR);
+ percent = (page - buf) * 100 / strlen(buf);
+ wmove(win, getmaxy(win) - 3, getmaxx(win) - 9);
wprintw(win, "(%3d%%)", percent);
}
generated by cgit v1.1 at 2024-12-25 00:52:01 +0000