regedit: Introduce dialog windows.

Link to ncurses "panels" library to support popup dialog
windows, and begin working on a small dialog library.

Right now, it is useful for "yes/no" confirmation popups,
but later it'll be used for more complex forms for editing
values.

Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>

1 files changed, 233 insertions, 0 deletions

diff --git a/source3/utils/regedit_dialog.c b/source3/utils/regedit_dialog.c
new file mode 100644
index 0000000000..419c4081e0
--- /dev/null
+++ b/source3/utils/regedit_dialog.c
@@ -0,0 +1,233 @@
+/*
+ * Samba Unix/Linux SMB client library
+ * Registry Editor
+ * Copyright (C) Christopher Davis 2012
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "includes.h"
+#include "regedit_dialog.h"
+#include <stdarg.h>
+
+static int dialog_free(struct dialog *dia)
+{
+	if (dia->window) {
+		delwin(dia->window);
+	}
+	if (dia->sub_window) {
+		delwin(dia->sub_window);
+	}
+	if (dia->panel) {
+		del_panel(dia->panel);
+	}
+	if (dia->choices) {
+		unpost_menu(dia->choices);
+		free_menu(dia->choices);
+	}
+	if (dia->choice_items) {
+		ITEM **it;
+		for (it = dia->choice_items; *it != NULL; ++it) {
+			free_item(*it);
+		}
+	}
+
+	return 0;
+}
+
+struct dialog *dialog_new(TALLOC_CTX *ctx, const char *title, int nlines,
+			  int ncols, int y, int x)
+{
+	struct dialog *dia;
+
+	dia = talloc_zero(ctx, struct dialog);
+	if (dia == NULL) {
+		return NULL;
+	}
+
+	talloc_set_destructor(dia, dialog_free);
+
+	dia->window = newwin(nlines, ncols, y, x);
+	if (dia->window == NULL) {
+		goto fail;
+	}
+
+	box(dia->window, 0, 0);
+	mvwaddstr(dia->window, 0, 1, title);
+
+	/* body of the dialog within the box outline */
+	dia->sub_window = derwin(dia->window, nlines - 2, ncols - 2, 1, 1);
+	if (dia->sub_window == NULL) {
+		goto fail;
+	}
+
+	dia->panel = new_panel(dia->window);
+	if (dia->panel == NULL) {
+		goto fail;
+	}
+
+	return dia;
+
+fail:
+	talloc_free(dia);
+
+	return NULL;
+
+}
+
+struct dialog *dialog_center_new(TALLOC_CTX *ctx, const char *title, int nlines,
+				 int ncols, WINDOW *below)
+{
+	int y, x, maxy, maxx;
+
+	getmaxyx(below, maxy, maxx);
+
+	y = maxy / 2 - nlines;
+	x = maxx / 2 - ncols;
+
+	return dialog_new(ctx, title, nlines, ncols, y, x);
+}
+
+struct dialog *dialog_choice_new(TALLOC_CTX *ctx, const char *title,
+				 const char **choices, int nlines,
+				 int ncols, int y, int x)
+{
+	size_t nchoices, i;
+	struct dialog *dia;
+
+	dia = dialog_new(ctx, title, nlines, ncols, y, x);
+	if (dia == NULL) {
+		return NULL;
+	}
+
+	dia->menu_window = derwin(dia->sub_window, 1, ncols - 3,
+				  nlines - 3, 0);
+	if (dia->menu_window == NULL) {
+		goto fail;
+	}
+
+	for (nchoices = 0; choices[nchoices] != NULL; ++nchoices)
+		;
+	dia->choice_items = talloc_zero_array(dia, ITEM *, nchoices + 1);
+	if (dia->choice_items == NULL) {
+		goto fail;
+	}
+	for (i = 0; i < nchoices; ++i) {
+		char *desc = talloc_strdup(dia, choices[i]);
+		if (desc == NULL) {
+			goto fail;
+		}
+		dia->choice_items[i] = new_item(desc, desc);
+		if (dia->choice_items[i] == NULL) {
+			goto fail;
+		}
+		/* store choice index */
+		set_item_userptr(dia->choice_items[i], (void*)(uintptr_t)i);
+	}
+
+	dia->choices = new_menu(dia->choice_items);
+	if (dia->choices == NULL) {
+		goto fail;
+	}
+
+	set_menu_format(dia->choices, 1, ncols);
+	set_menu_win(dia->choices, dia->sub_window);
+	set_menu_sub(dia->choices, dia->menu_window);
+	menu_opts_off(dia->choices, O_SHOWDESC);
+	set_menu_mark(dia->choices, "* ");
+	post_menu(dia->choices);
+	wmove(dia->sub_window, 0, 0);
+
+	return dia;
+
+fail:
+	talloc_free(dia);
+
+	return NULL;
+}
+
+struct dialog *dialog_choice_center_new(TALLOC_CTX *ctx, const char *title,
+					const char **choices, int nlines,
+					int ncols, WINDOW *below)
+{
+	int y, x, maxy, maxx;
+
+	getmaxyx(below, maxy, maxx);
+
+	y = maxy / 2 - nlines;
+	x = maxx / 2 - ncols;
+
+	return dialog_choice_new(ctx, title, choices, nlines, ncols, y, x);
+}
+
+struct dialog *dialog_confirm_new(TALLOC_CTX *ctx, const char *title,
+				  WINDOW *below, const char *msg, ...)
+{
+	va_list ap;
+	struct dialog *dia;
+	char *str;
+	const char *choices[] = {
+		"Ok",
+		"Cancel",
+		NULL
+	};
+	int width;
+
+	va_start(ap, msg);
+	str = talloc_vasprintf(ctx, msg, ap);
+	va_end(ap);
+	if (str == NULL) {
+		return NULL;
+	}
+
+	width = strlen(str) + 2;
+
+	dia = dialog_choice_center_new(ctx, title, choices, 5, width, below);
+	if (dia == NULL) {
+		return NULL;
+	}
+
+	waddstr(dia->sub_window, str);
+	talloc_free(str);
+
+	return dia;
+}
+
+void dialog_set_cb(struct dialog *dia, dialogfn fn, void *arg)
+{
+	dia->dialogcb = fn;
+	dia->dialogarg = arg;
+}
+
+void dialog_driver(struct dialog *dia, enum dialog_op op)
+{
+	switch (op) {
+	case DIALOG_LEFT:
+		menu_driver(dia->choices, REQ_LEFT_ITEM);
+		break;
+	case DIALOG_RIGHT:
+		menu_driver(dia->choices, REQ_RIGHT_ITEM);
+		break;
+	case DIALOG_ENTER:
+		if (dia->dialogcb) {
+			ITEM *item;
+			int selection;
+
+			item = current_item(dia->choices);
+			selection = (int)(uintptr_t)item_userptr(item);
+			dia->dialogcb(dia, selection, dia->dialogarg);
+		}
+		break;
+	}
+}