4f2de3e199
According to the documentation [1], LINES and COLS are initialized by initscr(); it does not say anything about the behavior when windows are resized. Do not rely on the current implementation of ncurses that updates these variables on resize, but use the propper function calls to get window dimensions. init_dialog() could make use of the variables, but for the sake of consistency we do not change it's current use of the macro getmaxyx(). [1] ncurses(3X) Signed-off-by: Dirk Gouders <dirk@gouders.net> Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
302 lines
7 KiB
C
302 lines
7 KiB
C
/*
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* inputbox.c -- implements the input box
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*
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* ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
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* MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "dialog.h"
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char dialog_input_result[MAX_LEN + 1];
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/*
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* Print the termination buttons
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*/
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static void print_buttons(WINDOW * dialog, int height, int width, int selected)
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{
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int x = width / 2 - 11;
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int y = height - 2;
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print_button(dialog, gettext(" Ok "), y, x, selected == 0);
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print_button(dialog, gettext(" Help "), y, x + 14, selected == 1);
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wmove(dialog, y, x + 1 + 14 * selected);
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wrefresh(dialog);
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}
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/*
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* Display a dialog box for inputing a string
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*/
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int dialog_inputbox(const char *title, const char *prompt, int height, int width,
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const char *init)
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{
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int i, x, y, box_y, box_x, box_width;
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int input_x = 0, key = 0, button = -1;
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int show_x, len, pos;
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char *instr = dialog_input_result;
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WINDOW *dialog;
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if (!init)
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instr[0] = '\0';
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else
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strcpy(instr, init);
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do_resize:
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if (getmaxy(stdscr) <= (height - INPUTBOX_HEIGTH_MIN))
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return -ERRDISPLAYTOOSMALL;
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if (getmaxx(stdscr) <= (width - INPUTBOX_WIDTH_MIN))
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return -ERRDISPLAYTOOSMALL;
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/* center dialog box on screen */
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x = (getmaxx(stdscr) - width) / 2;
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y = (getmaxy(stdscr) - height) / 2;
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draw_shadow(stdscr, y, x, height, width);
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dialog = newwin(height, width, y, x);
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keypad(dialog, TRUE);
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draw_box(dialog, 0, 0, height, width,
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dlg.dialog.atr, dlg.border.atr);
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wattrset(dialog, dlg.border.atr);
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mvwaddch(dialog, height - 3, 0, ACS_LTEE);
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for (i = 0; i < width - 2; i++)
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waddch(dialog, ACS_HLINE);
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wattrset(dialog, dlg.dialog.atr);
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waddch(dialog, ACS_RTEE);
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print_title(dialog, title, width);
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wattrset(dialog, dlg.dialog.atr);
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print_autowrap(dialog, prompt, width - 2, 1, 3);
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/* Draw the input field box */
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box_width = width - 6;
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getyx(dialog, y, x);
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box_y = y + 2;
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box_x = (width - box_width) / 2;
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draw_box(dialog, y + 1, box_x - 1, 3, box_width + 2,
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dlg.dialog.atr, dlg.border.atr);
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print_buttons(dialog, height, width, 0);
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/* Set up the initial value */
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wmove(dialog, box_y, box_x);
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wattrset(dialog, dlg.inputbox.atr);
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len = strlen(instr);
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pos = len;
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if (len >= box_width) {
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show_x = len - box_width + 1;
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input_x = box_width - 1;
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for (i = 0; i < box_width - 1; i++)
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waddch(dialog, instr[show_x + i]);
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} else {
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show_x = 0;
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input_x = len;
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waddstr(dialog, instr);
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}
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wmove(dialog, box_y, box_x + input_x);
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wrefresh(dialog);
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while (key != KEY_ESC) {
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key = wgetch(dialog);
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if (button == -1) { /* Input box selected */
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switch (key) {
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case TAB:
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case KEY_UP:
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case KEY_DOWN:
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break;
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case KEY_BACKSPACE:
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case 127:
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if (pos) {
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wattrset(dialog, dlg.inputbox.atr);
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if (input_x == 0) {
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show_x--;
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} else
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input_x--;
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if (pos < len) {
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for (i = pos - 1; i < len; i++) {
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instr[i] = instr[i+1];
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}
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}
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pos--;
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len--;
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instr[len] = '\0';
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wmove(dialog, box_y, box_x);
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for (i = 0; i < box_width; i++) {
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if (!instr[show_x + i]) {
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waddch(dialog, ' ');
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break;
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}
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waddch(dialog, instr[show_x + i]);
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}
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wmove(dialog, box_y, input_x + box_x);
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wrefresh(dialog);
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}
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continue;
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case KEY_LEFT:
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if (pos > 0) {
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if (input_x > 0) {
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wmove(dialog, box_y, --input_x + box_x);
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} else if (input_x == 0) {
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show_x--;
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wmove(dialog, box_y, box_x);
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for (i = 0; i < box_width; i++) {
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if (!instr[show_x + i]) {
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waddch(dialog, ' ');
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break;
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}
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waddch(dialog, instr[show_x + i]);
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}
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wmove(dialog, box_y, box_x);
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}
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pos--;
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}
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continue;
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case KEY_RIGHT:
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if (pos < len) {
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if (input_x < box_width - 1) {
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wmove(dialog, box_y, ++input_x + box_x);
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} else if (input_x == box_width - 1) {
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show_x++;
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wmove(dialog, box_y, box_x);
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for (i = 0; i < box_width; i++) {
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if (!instr[show_x + i]) {
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waddch(dialog, ' ');
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break;
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}
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waddch(dialog, instr[show_x + i]);
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}
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wmove(dialog, box_y, input_x + box_x);
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}
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pos++;
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}
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continue;
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default:
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if (key < 0x100 && isprint(key)) {
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if (len < MAX_LEN) {
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wattrset(dialog, dlg.inputbox.atr);
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if (pos < len) {
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for (i = len; i > pos; i--)
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instr[i] = instr[i-1];
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instr[pos] = key;
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} else {
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instr[len] = key;
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}
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pos++;
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len++;
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instr[len] = '\0';
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if (input_x == box_width - 1) {
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show_x++;
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} else {
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input_x++;
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}
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wmove(dialog, box_y, box_x);
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for (i = 0; i < box_width; i++) {
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if (!instr[show_x + i]) {
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waddch(dialog, ' ');
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break;
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}
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waddch(dialog, instr[show_x + i]);
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}
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wmove(dialog, box_y, input_x + box_x);
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wrefresh(dialog);
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} else
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flash(); /* Alarm user about overflow */
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continue;
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}
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}
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}
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switch (key) {
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case 'O':
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case 'o':
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delwin(dialog);
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return 0;
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case 'H':
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case 'h':
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delwin(dialog);
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return 1;
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case KEY_UP:
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case KEY_LEFT:
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switch (button) {
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case -1:
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button = 1; /* Indicates "Help" button is selected */
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print_buttons(dialog, height, width, 1);
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break;
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case 0:
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button = -1; /* Indicates input box is selected */
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print_buttons(dialog, height, width, 0);
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wmove(dialog, box_y, box_x + input_x);
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wrefresh(dialog);
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break;
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case 1:
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button = 0; /* Indicates "OK" button is selected */
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print_buttons(dialog, height, width, 0);
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break;
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}
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break;
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case TAB:
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case KEY_DOWN:
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case KEY_RIGHT:
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switch (button) {
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case -1:
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button = 0; /* Indicates "OK" button is selected */
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print_buttons(dialog, height, width, 0);
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break;
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case 0:
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button = 1; /* Indicates "Help" button is selected */
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print_buttons(dialog, height, width, 1);
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break;
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case 1:
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button = -1; /* Indicates input box is selected */
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print_buttons(dialog, height, width, 0);
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wmove(dialog, box_y, box_x + input_x);
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wrefresh(dialog);
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break;
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}
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break;
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case ' ':
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case '\n':
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delwin(dialog);
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return (button == -1 ? 0 : button);
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case 'X':
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case 'x':
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key = KEY_ESC;
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break;
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case KEY_ESC:
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key = on_key_esc(dialog);
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break;
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case KEY_RESIZE:
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delwin(dialog);
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on_key_resize();
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goto do_resize;
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}
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}
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delwin(dialog);
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return KEY_ESC; /* ESC pressed */
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}
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