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Diffstat (limited to 'util/kconfig/lxdialog/textbox.c')
-rw-r--r--util/kconfig/lxdialog/textbox.c185
1 files changed, 100 insertions, 85 deletions
diff --git a/util/kconfig/lxdialog/textbox.c b/util/kconfig/lxdialog/textbox.c
index 68b57575b0..1773319b95 100644
--- a/util/kconfig/lxdialog/textbox.c
+++ b/util/kconfig/lxdialog/textbox.c
@@ -22,23 +22,25 @@
#include "dialog.h"
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 void print_page(WINDOW *win, int height, int width, update_text_fn
+ update_text, void *data);
+static void print_line(WINDOW *win, int row, int width);
static char *get_line(void);
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;
+static char *buf;
+static char *page;
/*
* refresh window content
*/
static void refresh_text_box(WINDOW *dialog, WINDOW *box, int boxh, int boxw,
- int cur_y, int cur_x)
+ int cur_y, int cur_x, update_text_fn update_text,
+ void *data)
{
- print_page(box, boxh, boxw);
+ print_page(box, boxh, boxw, update_text, data);
print_position(dialog);
wmove(dialog, cur_y, cur_x); /* Restore cursor position */
wrefresh(dialog);
@@ -47,14 +49,18 @@ static void refresh_text_box(WINDOW *dialog, WINDOW *box, int boxh, int boxw,
/*
* Display text from a file in a dialog box.
+ *
+ * keys is a null-terminated array
+ * update_text() may not add or remove any '\n' or '\0' in tbuf
*/
-int dialog_textbox(const char *title, const char *tbuf,
- int initial_height, int initial_width)
+int dialog_textbox(const char *title, char *tbuf, int initial_height,
+ int initial_width, int *keys, int *_vscroll, int *_hscroll,
+ update_text_fn update_text, void *data)
{
int i, x, y, cur_x, cur_y, key = 0;
int height, width, boxh, boxw;
- int passed_end;
WINDOW *dialog, *box;
+ bool done = false;
begin_reached = 1;
end_reached = 0;
@@ -63,9 +69,18 @@ int dialog_textbox(const char *title, const char *tbuf,
buf = tbuf;
page = buf; /* page is pointer to start of page to be displayed */
+ if (_vscroll && *_vscroll) {
+ begin_reached = 0;
+
+ for (i = 0; i < *_vscroll; i++)
+ get_line();
+ }
+ if (_hscroll)
+ hscroll = *_hscroll;
+
do_resize:
getmaxyx(stdscr, height, width);
- if (height < 8 || width < 8)
+ if (height < TEXTBOX_HEIGTH_MIN || width < TEXTBOX_WIDTH_MIN)
return -ERRDISPLAYTOOSMALL;
if (initial_height != 0)
height = initial_height;
@@ -83,8 +98,8 @@ do_resize:
width = 0;
/* center dialog box on screen */
- x = (COLS - width) / 2;
- y = (LINES - height) / 2;
+ x = (getmaxx(stdscr) - width) / 2;
+ y = (getmaxy(stdscr) - height) / 2;
draw_shadow(stdscr, y, x, height, width);
@@ -120,25 +135,28 @@ do_resize:
/* Print first page of text */
attr_clear(box, boxh, boxw, dlg.dialog.atr);
- refresh_text_box(dialog, box, boxh, boxw, cur_y, cur_x);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y, cur_x, update_text,
+ data);
- while ((key != KEY_ESC) && (key != '\n')) {
+ while (!done) {
key = wgetch(dialog);
switch (key) {
case 'E': /* Exit */
case 'e':
case 'X':
case 'x':
- delwin(box);
- delwin(dialog);
- return 0;
+ case 'q':
+ case '\n':
+ done = true;
+ break;
case 'g': /* First page */
case KEY_HOME:
if (!begin_reached) {
begin_reached = 1;
page = buf;
refresh_text_box(dialog, box, boxh, boxw,
- cur_y, cur_x);
+ cur_y, cur_x, update_text,
+ data);
}
break;
case 'G': /* Last page */
@@ -148,78 +166,48 @@ do_resize:
/* point to last char in buf */
page = buf + strlen(buf);
back_lines(boxh);
- refresh_text_box(dialog, box, boxh, boxw,
- cur_y, cur_x);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x, update_text, data);
break;
case 'K': /* Previous line */
case 'k':
case KEY_UP:
- 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(box, TRUE);
- wscrl(box, -1); /* Scroll box region down one line */
- scrollok(box, FALSE);
- page_length = 0;
- passed_end = 0;
- for (i = 0; i < boxh; i++) {
- if (!i) {
- /* print first line of page */
- print_line(box, 0, boxw);
- wnoutrefresh(box);
- } else
- /* Called to update 'end_reached' and 'page' */
- get_line();
- if (!passed_end)
- page_length++;
- if (end_reached && !passed_end)
- passed_end = 1;
- }
+ if (begin_reached)
+ break;
- print_position(dialog);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
- }
+ back_lines(page_length + 1);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x, update_text, data);
break;
case 'B': /* Previous page */
case 'b':
+ case 'u':
case KEY_PPAGE:
if (begin_reached)
break;
back_lines(page_length + boxh);
- refresh_text_box(dialog, box, boxh, boxw,
- cur_y, cur_x);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x, update_text, data);
break;
case 'J': /* Next line */
case 'j':
case KEY_DOWN:
- if (!end_reached) {
- begin_reached = 0;
- 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);
- }
+ if (end_reached)
+ break;
+
+ back_lines(page_length - 1);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x, update_text, data);
break;
case KEY_NPAGE: /* Next page */
case ' ':
+ case 'd':
if (end_reached)
break;
begin_reached = 0;
- refresh_text_box(dialog, box, boxh, boxw,
- cur_y, cur_x);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x, update_text, data);
break;
case '0': /* Beginning of line */
case 'H': /* Scroll left */
@@ -234,8 +222,8 @@ do_resize:
hscroll--;
/* Reprint current page to scroll horizontally */
back_lines(page_length);
- refresh_text_box(dialog, box, boxh, boxw,
- cur_y, cur_x);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x, update_text, data);
break;
case 'L': /* Scroll right */
case 'l':
@@ -245,25 +233,44 @@ do_resize:
hscroll++;
/* Reprint current page to scroll horizontally */
back_lines(page_length);
- refresh_text_box(dialog, box, boxh, boxw,
- cur_y, cur_x);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x, update_text, data);
break;
case KEY_ESC:
- key = on_key_esc(dialog);
+ if (on_key_esc(dialog) == KEY_ESC)
+ done = true;
break;
-#ifdef NCURSES_VERSION
case KEY_RESIZE:
back_lines(height);
delwin(box);
delwin(dialog);
on_key_resize();
goto do_resize;
-#endif
+ default:
+ for (i = 0; keys[i]; i++) {
+ if (key == keys[i]) {
+ done = true;
+ break;
+ }
+ }
}
}
delwin(box);
delwin(dialog);
- return key; /* ESC pressed */
+ if (_vscroll) {
+ const char *s;
+
+ s = buf;
+ *_vscroll = 0;
+ back_lines(page_length);
+ while (s < page && (s = strchr(s, '\n'))) {
+ (*_vscroll)++;
+ s++;
+ }
+ }
+ if (_hscroll)
+ *_hscroll = hscroll;
+ return key;
}
/*
@@ -300,12 +307,23 @@ static void back_lines(int n)
}
/*
- * Print a new page of text. Called by dialog_textbox().
+ * Print a new page of text.
*/
-static void print_page(WINDOW * win, int height, int width)
+static void print_page(WINDOW *win, int height, int width, update_text_fn
+ update_text, void *data)
{
int i, passed_end = 0;
+ if (update_text) {
+ char *end;
+
+ for (i = 0; i < height; i++)
+ get_line();
+ end = page;
+ back_lines(height);
+ update_text(buf, page - buf, end - buf, data);
+ }
+
page_length = 0;
for (i = 0; i < height; i++) {
print_line(win, i, width);
@@ -318,11 +336,10 @@ static void print_page(WINDOW * win, int height, int width)
}
/*
- * Print a new line of text. Called by dialog_textbox() and print_page().
+ * Print a new line of text.
*/
static void print_line(WINDOW * win, int row, int width)
{
- int y, x;
char *line;
line = get_line();
@@ -331,10 +348,10 @@ static void print_line(WINDOW * win, int row, int width)
waddch(win, ' ');
waddnstr(win, line, MIN(strlen(line), width - 2));
- getyx(win, y, x);
/* Clear 'residue' of previous line */
#if OLD_NCURSES
{
+ int x = getcurx(win);
int i;
for (i = 0; i < width - x; i++)
waddch(win, ' ');
@@ -357,10 +374,8 @@ static char *get_line(void)
end_reached = 0;
while (*page != '\n') {
if (*page == '\0') {
- if (!end_reached) {
- end_reached = 1;
- break;
- }
+ end_reached = 1;
+ break;
} else if (i < MAX_LEN)
line[i++] = *(page++);
else {
@@ -373,7 +388,7 @@ static char *get_line(void)
if (i <= MAX_LEN)
line[i] = '\0';
if (!end_reached)
- page++; /* move pass '\n' */
+ page++; /* move past '\n' */
return line;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 21:58:14 +0000