This is based on a patch posted to lkml by Petr Baudis on 23 Nov, which was

then considerably hacked up by me.  This eliminates the separate lxdialog and
instead directly uses the lxdialog internals.  This allows 'make menuconfig'
to be much faster.
 -Erik

1 files changed, 240 insertions, 0 deletions

diff --git a/extra/config/inputbox.c b/extra/config/inputbox.c
new file mode 100644
index 000000000..fa7bebc69
--- /dev/null
+++ b/extra/config/inputbox.c
@@ -0,0 +1,240 @@
+/*
+ *  inputbox.c -- implements the input box
+ *
+ *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
+ *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "dialog.h"
+
+unsigned char dialog_input_result[MAX_LEN + 1];
+
+/*
+ *  Print the termination buttons
+ */
+static void
+print_buttons(WINDOW *dialog, int height, int width, int selected)
+{
+    int x = width / 2 - 11;
+    int y = height - 2;
+
+    print_button (dialog, "  Ok  ", y, x, selected==0);
+    print_button (dialog, " Help ", y, x + 14, selected==1);
+
+    wmove(dialog, y, x+1+14*selected);
+    wrefresh(dialog);
+}
+
+/*
+ * Display a dialog box for inputing a string
+ */
+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;
+    unsigned char *instr = dialog_input_result;
+    WINDOW *dialog;
+
+    /* center dialog box on screen */
+    x = (COLS - width) / 2;
+    y = (LINES - height) / 2;
+
+
+    draw_shadow (stdscr, y, x, height, width);
+
+    dialog = newwin (height, width, y, x);
+    keypad (dialog, TRUE);
+
+    draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr);
+    wattrset (dialog, border_attr);
+    mvwaddch (dialog, height-3, 0, ACS_LTEE);
+    for (i = 0; i < width - 2; i++)
+	waddch (dialog, ACS_HLINE);
+    wattrset (dialog, dialog_attr);
+    waddch (dialog, ACS_RTEE);
+
+    if (title != NULL && strlen(title) >= width-2 ) {
+	/* truncate long title -- mec */
+	char * title2 = malloc(width-2+1);
+	memcpy( title2, title, width-2 );
+	title2[width-2] = '\0';
+	title = title2;
+    }
+
+    if (title != NULL) {
+	wattrset (dialog, title_attr);
+	mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
+	waddstr (dialog, (char *)title);
+	waddch (dialog, ' ');
+    }
+
+    wattrset (dialog, dialog_attr);
+    print_autowrap (dialog, prompt, width - 2, 1, 3);
+
+    /* Draw the input field box */
+    box_width = width - 6;
+    getyx (dialog, y, x);
+    box_y = y + 2;
+    box_x = (width - box_width) / 2;
+    draw_box (dialog, y + 1, box_x - 1, 3, box_width + 2,
+	      border_attr, dialog_attr);
+
+    print_buttons(dialog, height, width, 0);
+
+    /* Set up the initial value */
+    wmove (dialog, box_y, box_x);
+    wattrset (dialog, inputbox_attr);
+
+    if (!init)
+	instr[0] = '\0';
+    else
+	strcpy (instr, init);
+
+    input_x = strlen (instr);
+
+    if (input_x >= box_width) {
+	scroll = input_x - box_width + 1;
+	input_x = box_width - 1;
+	for (i = 0; i < box_width - 1; i++)
+	    waddch (dialog, instr[scroll + i]);
+    } else
+	waddstr (dialog, instr);
+
+    wmove (dialog, box_y, box_x + input_x);
+
+    wrefresh (dialog);
+
+    while (key != ESC) {
+	key = wgetch (dialog);
+
+	if (button == -1) {	/* Input box selected */
+	    switch (key) {
+	    case TAB:
+	    case KEY_UP:
+	    case KEY_DOWN:
+		break;
+	    case KEY_LEFT:
+		continue;
+	    case KEY_RIGHT:
+		continue;
+	    case KEY_BACKSPACE:
+	    case 127:
+		if (input_x || scroll) {
+		    wattrset (dialog, inputbox_attr);
+		    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;
+		    } else
+			input_x--;
+		    instr[scroll + input_x] = '\0';
+		    mvwaddch (dialog, box_y, input_x + box_x, ' ');
+		    wmove (dialog, box_y, input_x + box_x);
+		    wrefresh (dialog);
+		}
+		continue;
+	    default:
+		if (key < 0x100 && isprint (key)) {
+		    if (scroll + input_x < MAX_LEN) {
+			wattrset (dialog, inputbox_attr);
+			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]);
+			} else {
+			    wmove (dialog, box_y, input_x++ + box_x);
+			    waddch (dialog, key);
+			}
+			wrefresh (dialog);
+		    } else
+			flash ();	/* Alarm user about overflow */
+		    continue;
+		}
+	    }
+	}
+	switch (key) {
+	case 'O':
+	case 'o':
+	    delwin (dialog);
+	    return 0;
+	case 'H':
+	case 'h':
+	    delwin (dialog);
+	    return 1;
+	case KEY_UP:
+	case KEY_LEFT:
+	    switch (button) {
+	    case -1:
+		button = 1;	/* Indicates "Cancel" button is selected */
+		print_buttons(dialog, height, width, 1);
+		break;
+	    case 0:
+		button = -1;	/* Indicates input box is selected */
+		print_buttons(dialog, height, width, 0);
+		wmove (dialog, box_y, box_x + input_x);
+		wrefresh (dialog);
+		break;
+	    case 1:
+		button = 0;	/* Indicates "OK" button is selected */
+		print_buttons(dialog, height, width, 0);
+		break;
+	    }
+	    break;
+	case TAB:
+	case KEY_DOWN:
+	case KEY_RIGHT:
+	    switch (button) {
+	    case -1:
+		button = 0;	/* Indicates "OK" button is selected */
+		print_buttons(dialog, height, width, 0);
+		break;
+	    case 0:
+		button = 1;	/* Indicates "Cancel" button is selected */
+		print_buttons(dialog, height, width, 1);
+		break;
+	    case 1:
+		button = -1;	/* Indicates input box is selected */
+		print_buttons(dialog, height, width, 0);
+		wmove (dialog, box_y, box_x + input_x);
+		wrefresh (dialog);
+		break;
+	    }
+	    break;
+	case ' ':
+	case '\n':
+	    delwin (dialog);
+	    return (button == -1 ? 0 : button);
+	case 'X':
+	case 'x':
+	    key = ESC;
+	case ESC:
+	    break;
+	}
+    }
+
+    delwin (dialog);
+    return -1;			/* ESC pressed */
+}