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menuconfig:inputbox: support navigate input position

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This patch add support navigate input position *inside* the input
field with LEFT/RIGHT, so it is possible to modify the text in place.

Signed-off-by: Wang YanQing <udknight@gmail.com>
Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
This commit is contained in:
Wang YanQing 2012-12-17 22:38:02 +08:00 committed by Yann E. MORIN
parent 169743264f
commit 87727d453b
1 changed files with 93 additions and 30 deletions
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123
scripts/kconfig/lxdialog/inputbox.c
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@ -45,7 +45,8 @@ int dialog_inputbox(const char *title, const char *prompt, int height, int width
const char *init)
{
int i, x, y, box_y, box_x, box_width;
int input_x = 0, scroll = 0, key = 0, button = -1;
int input_x = 0, key = 0, button = -1;
int show_x, len, pos;
char *instr = dialog_input_result;
WINDOW *dialog;
@ -97,14 +98,17 @@ do_resize:
wmove(dialog, box_y, box_x);
wattrset(dialog, dlg.inputbox.atr);
input_x = strlen(instr);
len = strlen(instr);
pos = len;
if (input_x >= box_width) {
scroll = input_x - box_width + 1;
if (len >= box_width) {
show_x = len - box_width + 1;
input_x = box_width - 1;
for (i = 0; i < box_width - 1; i++)
waddch(dialog, instr[scroll + i]);
waddch(dialog, instr[show_x + i]);
} else {
show_x = 0;
input_x = len;
waddstr(dialog, instr);
}
@ -121,45 +125,104 @@ do_resize:
case KEY_UP:
case KEY_DOWN:
break;
case KEY_LEFT:
continue;
case KEY_RIGHT:
continue;
case KEY_BACKSPACE:
case 127:
if (input_x || scroll) {
if (pos) {
wattrset(dialog, dlg.inputbox.atr);
if (!input_x) {
scroll = scroll < box_width - 1 ? 0 : scroll - (box_width - 1);
wmove(dialog, box_y, box_x);
for (i = 0; i < box_width; i++)
waddch(dialog,
instr[scroll + input_x + i] ?
instr[scroll + input_x + i] : ' ');
input_x = strlen(instr) - scroll;
if (input_x == 0) {
show_x--;
} else
input_x--;
instr[scroll + input_x] = '\0';
mvwaddch(dialog, box_y, input_x + box_x, ' ');
if (pos < len) {
for (i = pos - 1; i < len; i++) {
instr[i] = instr[i+1];
}
}
pos--;
len--;
instr[len] = '\0';
wmove(dialog, box_y, box_x);
for (i = 0; i < box_width; i++) {
if (!instr[show_x + i]) {
waddch(dialog, ' ');
break;
}
waddch(dialog, instr[show_x + i]);
}
wmove(dialog, box_y, input_x + box_x);
wrefresh(dialog);
}
continue;
case KEY_LEFT:
if (pos > 0) {
if (input_x > 0) {
wmove(dialog, box_y, --input_x + box_x);
} else if (input_x == 0) {
show_x--;
wmove(dialog, box_y, box_x);
for (i = 0; i < box_width; i++) {
if (!instr[show_x + i]) {
waddch(dialog, ' ');
break;
}
waddch(dialog, instr[show_x + i]);
}
wmove(dialog, box_y, box_x);
}
pos--;
}
continue;
case KEY_RIGHT:
if (pos < len) {
if (input_x < box_width - 1) {
wmove(dialog, box_y, ++input_x + box_x);
} else if (input_x == box_width - 1) {
show_x++;
wmove(dialog, box_y, box_x);
for (i = 0; i < box_width; i++) {
if (!instr[show_x + i]) {
waddch(dialog, ' ');
break;
}
waddch(dialog, instr[show_x + i]);
}
wmove(dialog, box_y, input_x + box_x);
}
pos++;
}
continue;
default:
if (key < 0x100 && isprint(key)) {
if (scroll + input_x < MAX_LEN) {
if (len < MAX_LEN) {
wattrset(dialog, dlg.inputbox.atr);
instr[scroll + input_x] = key;
instr[scroll + input_x + 1] = '\0';
if (input_x == box_width - 1) {
scroll++;
wmove(dialog, box_y, box_x);
for (i = 0; i < box_width - 1; i++)
waddch(dialog, instr [scroll + i]);
if (pos < len) {
for (i = len; i > pos; i--)
instr[i] = instr[i-1];
instr[pos] = key;
} else {
wmove(dialog, box_y, input_x++ + box_x);
waddch(dialog, key);
instr[len] = key;
}
pos++;
len++;
instr[len] = '\0';
if (input_x == box_width - 1) {
show_x++;
} else {
input_x++;
}
wmove(dialog, box_y, box_x);
for (i = 0; i < box_width; i++) {
if (!instr[show_x + i]) {
waddch(dialog, ' ');
break;
}
waddch(dialog, instr[show_x + i]);
}
wmove(dialog, box_y, input_x + box_x);
wrefresh(dialog);
} else
flash(); /* Alarm user about overflow */