kconfig/menuconfig: lxdialog is now built-in

lxdialog was previously called as an external program causing screen
to flicker when used. With this patch lxdialog is now built-in.
It is loosly based om previous work by:  Petr Baudis <pasky@ucw.cz>

Following is a list of changes:
o Moved build of dialog routings to kconfig Makefile
o menubox + checklist uses a new item list to hold all menu items
o in util.c implmented helper function to deal with item list
o menubox now uses parameters to save scroll state (avoids temp file)
o textbox now get text to be displayed as parameter and not a file
o make sure to properly delete subwin's before main windows
o killed unused files: lxdialog.c msgbox.c
o modified return value for ESC to match direct calling
o in a few places the code has been adjusted to 80 char wide
o in textbox a small refactoring was made to make code remotely readable
o in mconf removed all unused stuff (functions/variables)

Following is a list of know short comings:
a) pressing ESC twice will be interpreted as two ESC presses
b) resize does not work. menuconfig needs to be restarted to be adjusted

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

1 files changed, 132 insertions, 2 deletions

diff --git a/scripts/kconfig/lxdialog/util.c b/scripts/kconfig/lxdialog/util.c
index e73a36df93b4..0b3118df50df 100644
--- a/scripts/kconfig/lxdialog/util.c
+++ b/scripts/kconfig/lxdialog/util.c
@@ -268,13 +268,18 @@ void dialog_clear(void)
 /*
  * Do some initialization for dialog
  */
-void init_dialog(void)
+void init_dialog(const char *backtitle)
+{
+        dlg.backtitle = backtitle;
+        color_setup(getenv("MENUCONFIG_COLOR"));
+}
+
+void reset_dialog(void)
 {
         initscr();              /* Init curses */
         keypad(stdscr, TRUE);
         cbreak();
         noecho();
-        color_setup(getenv("MENUCONFIG_COLOR"));
         dialog_clear();
 }
 
@@ -471,3 +476,128 @@ int first_alpha(const char *string, const char *exempt)
 
         return 0;
 }
+
+struct dialog_list *item_cur;
+struct dialog_list item_nil;
+struct dialog_list *item_head;
+
+void item_reset(void)
+{
+        struct dialog_list *p, *next;
+
+        for (p = item_head; p; p = next) {
+                next = p->next;
+                free(p);
+        }
+        item_head = NULL;
+        item_cur = &item_nil;
+}
+
+void item_make(const char *fmt, ...)
+{
+        va_list ap;
+        struct dialog_list *p = malloc(sizeof(*p));
+
+        if (item_head)
+                item_cur->next = p;
+        else
+                item_head = p;
+        item_cur = p;
+        memset(p, 0, sizeof(*p));
+
+        va_start(ap, fmt);
+        vsnprintf(item_cur->node.str, sizeof(item_cur->node.str), fmt, ap);
+        va_end(ap);
+}
+
+void item_add_str(const char *fmt, ...)
+{
+        va_list ap;
+        size_t avail;
+
+        avail = sizeof(item_cur->node.str) - strlen(item_cur->node.str);
+
+        va_start(ap, fmt);
+        vsnprintf(item_cur->node.str + strlen(item_cur->node.str),
+                  avail, fmt, ap);
+        item_cur->node.str[sizeof(item_cur->node.str) - 1] = '\0';
+        va_end(ap);
+}
+
+void item_set_tag(char tag)
+{
+        item_cur->node.tag = tag;
+}
+void item_set_data(void *ptr)
+{
+        item_cur->node.data = ptr;
+}
+
+void item_set_selected(int val)
+{
+        item_cur->node.selected = val;
+}
+
+int item_activate_selected(void)
+{
+        item_foreach()
+                if (item_is_selected())
+                        return 1;
+        return 0;
+}
+
+void *item_data(void)
+{
+        return item_cur->node.data;
+}
+
+char item_tag(void)
+{
+        return item_cur->node.tag;
+}
+
+int item_count(void)
+{
+        int n = 0;
+        struct dialog_list *p;
+
+        for (p = item_head; p; p = p->next)
+                n++;
+        return n;
+}
+
+void item_set(int n)
+{
+        int i = 0;
+        item_foreach()
+                if (i++ == n)
+                        return;
+}
+
+int item_n(void)
+{
+        int n = 0;
+        struct dialog_list *p;
+
+        for (p = item_head; p; p = p->next) {
+                if (p == item_cur)
+                        return n;
+                n++;
+        }
+        return 0;
+}
+
+const char *item_str(void)
+{
+        return item_cur->node.str;
+}
+
+int item_is_selected(void)
+{
+        return (item_cur->node.selected != 0);
+}
+
+int item_is_tag(char tag)
+{
+        return (item_cur->node.tag == tag);
+}