qulogic/libgnt

Fix arrow keys
fix-arrow-keys
2019-02-20, Petteri Pitkänen
7ac801527b0b
Fix arrow keys

The key-tree expects that for arrow keys the terminal transmits codes that
are defined in the terminfo database, but these codes are transmitted only
in application mode. To make the arrow key handling portable across
terminals, and to prevent the need for manually translating these codes, put
the terminal into application mode by calling ncurses keypad().

Fixes #12676.
/*
* GNT - The GLib Ncurses Toolkit
*
* GNT is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This library 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "gntinternal.h"
#include "gntmenu.h"
#include "gntmenuitemcheck.h"
#include <ctype.h>
#include <string.h>
enum
{
SIGS = 1,
};
enum
{
ITEM_TEXT = 0,
ITEM_TRIGGER,
ITEM_SUBMENU,
NUM_COLUMNS
};
static GntTreeClass *parent_class = NULL;
static void (*org_draw)(GntWidget *wid);
static void (*org_destroy)(GntWidget *wid);
static void (*org_map)(GntWidget *wid);
static void (*org_size_request)(GntWidget *wid);
static gboolean (*org_key_pressed)(GntWidget *w, const char *t);
static gboolean (*org_clicked)(GntWidget *w, GntMouseEvent event, int x, int y);
static void menuitem_activate(GntMenu *menu, GntMenuItem *item);
static void
menu_hide_all(GntMenu *menu)
{
while (menu->parentmenu)
menu = menu->parentmenu;
gnt_widget_hide(GNT_WIDGET(menu));
}
static void
show_submenu(GntMenu *menu)
{
GntMenuItem *item;
if (menu->type != GNT_MENU_TOPLEVEL)
return;
item = g_list_nth_data(menu->list, menu->selected);
if (!item || !item->submenu)
return;
menuitem_activate(menu, item);
}
static void
gnt_menu_draw(GntWidget *widget)
{
GntMenu *menu = GNT_MENU(widget);
GList *iter;
chtype type;
guint i;
if (menu->type == GNT_MENU_TOPLEVEL) {
wbkgdset(widget->window, '\0' | gnt_color_pair(GNT_COLOR_HIGHLIGHT));
werase(widget->window);
for (i = 0, iter = menu->list; iter; iter = iter->next, i++) {
GntMenuItem *item = GNT_MENU_ITEM(iter->data);
if (!gnt_menuitem_is_visible(item))
continue;
type = ' ';
if (item->callback || item->submenu)
type |= gnt_color_pair(GNT_COLOR_HIGHLIGHT);
else
type |= gnt_color_pair(GNT_COLOR_DISABLED);
if (i == menu->selected)
type |= A_REVERSE;
item->priv.x = getcurx(widget->window) + widget->priv.x;
item->priv.y = getcury(widget->window) + widget->priv.y + 1;
wbkgdset(widget->window, type);
wprintw(widget->window, " %s ", C_(item->text));
}
} else {
org_draw(widget);
}
GNTDEBUG;
}
static void
gnt_menu_size_request(GntWidget *widget)
{
GntMenu *menu = GNT_MENU(widget);
if (menu->type == GNT_MENU_TOPLEVEL) {
widget->priv.height = 1;
widget->priv.width = getmaxx(stdscr);
} else {
org_size_request(widget);
widget->priv.height = g_list_length(menu->list) + 2;
}
}
static void
menu_tree_add(GntMenu *menu, GntMenuItem *item, GntMenuItem *parent)
{
char trigger[] = "\0 )\0";
g_return_if_fail(item != NULL);
if ((trigger[1] = gnt_menuitem_get_trigger(item)) && trigger[1] != ' ')
trigger[0] = '(';
if (GNT_IS_MENU_ITEM_CHECK(item)) {
gnt_tree_add_choice(GNT_TREE(menu), item,
gnt_tree_create_row(GNT_TREE(menu), item->text, trigger, " "), parent, NULL);
gnt_tree_set_choice(GNT_TREE(menu), item, gnt_menuitem_check_get_checked(GNT_MENU_ITEM_CHECK(item)));
} else {
gnt_tree_add_row_last(GNT_TREE(menu), item,
gnt_tree_create_row(GNT_TREE(menu), item->text, trigger, item->submenu ? ">" : " "), parent);
if (!item->callback && !item->submenu)
gnt_tree_set_row_color(GNT_TREE(menu), item, GNT_COLOR_DISABLED);
}
if (0 && item->submenu) {
GntMenu *sub = GNT_MENU(item->submenu);
GList *iter;
for (iter = sub->list; iter; iter = iter->next) {
GntMenuItem *it = GNT_MENU_ITEM(iter->data);
menu_tree_add(menu, it, item);
}
}
}
#define GET_VAL(ch) ((ch >= '0' && ch <= '9') ? (ch - '0') : (ch >= 'a' && ch <= 'z') ? (10 + ch - 'a') : 36)
static void
assign_triggers(GntMenu *menu)
{
GList *iter;
gboolean bools[37];
memset(bools, 0, sizeof(bools));
bools[36] = 1;
for (iter = menu->list; iter; iter = iter->next) {
GntMenuItem *item = iter->data;
char trigger = tolower(gnt_menuitem_get_trigger(item));
if (trigger == '\0' || trigger == ' ')
continue;
bools[(int)GET_VAL(trigger)] = 1;
}
for (iter = menu->list; iter; iter = iter->next) {
GntMenuItem *item = iter->data;
char trigger = gnt_menuitem_get_trigger(item);
const char *text = item->text;
if (trigger != '\0')
continue;
while (*text) {
char ch = tolower(*text++);
char t[2] = {ch, '\0'};
if (ch == ' ' || bools[(int)GET_VAL(ch)] || gnt_bindable_check_key(GNT_BINDABLE(menu), t))
continue;
trigger = ch;
break;
}
if (trigger == 0)
trigger = item->text[0];
gnt_menuitem_set_trigger(item, trigger);
bools[(int)GET_VAL(trigger)] = 1;
}
}
static void
gnt_menu_map(GntWidget *widget)
{
GntMenu *menu = GNT_MENU(widget);
if (menu->type == GNT_MENU_TOPLEVEL) {
gnt_widget_size_request(widget);
} else {
/* Populate the tree */
GList *iter;
gnt_tree_remove_all(GNT_TREE(widget));
/* Try to assign some trigger for the items */
assign_triggers(menu);
for (iter = menu->list; iter; iter = iter->next) {
GntMenuItem *item = GNT_MENU_ITEM(iter->data);
menu_tree_add(menu, item, NULL);
}
org_map(widget);
gnt_tree_adjust_columns(GNT_TREE(widget));
}
GNTDEBUG;
}
static void
menuitem_activate(GntMenu *menu, GntMenuItem *item)
{
if (!item)
return;
if (gnt_menuitem_activate(item)) {
menu_hide_all(menu);
} else {
if (item->submenu) {
GntMenu *sub = GNT_MENU(item->submenu);
menu->submenu = sub;
sub->type = GNT_MENU_POPUP; /* Submenus are *never* toplevel */
sub->parentmenu = menu;
if (menu->type != GNT_MENU_TOPLEVEL) {
GntWidget *widget = GNT_WIDGET(menu);
item->priv.x = widget->priv.x + widget->priv.width - 1;
item->priv.y = widget->priv.y + gnt_tree_get_selection_visible_line(GNT_TREE(menu));
}
gnt_widget_set_position(GNT_WIDGET(sub), item->priv.x, item->priv.y);
GNT_WIDGET_UNSET_FLAGS(GNT_WIDGET(sub), GNT_WIDGET_INVISIBLE);
gnt_widget_draw(GNT_WIDGET(sub));
} else {
menu_hide_all(menu);
}
}
}
static GList*
find_item_with_trigger(GList *start, GList *end, char trigger)
{
GList *iter;
for (iter = start; iter != (end ? end : NULL); iter = iter->next) {
if (gnt_menuitem_get_trigger(iter->data) == trigger)
return iter;
}
return NULL;
}
static gboolean
check_for_trigger(GntMenu *menu, char trigger)
{
/* check for a trigger key */
GList *iter;
GList *find;
GList *nth = g_list_find(menu->list, gnt_tree_get_selection_data(GNT_TREE(menu)));
if (nth == NULL)
return FALSE;
find = find_item_with_trigger(nth->next, NULL, trigger);
if (!find)
find = find_item_with_trigger(menu->list, nth->next, trigger);
if (!find)
return FALSE;
if (find != nth) {
gnt_tree_set_selected(GNT_TREE(menu), find->data);
iter = find_item_with_trigger(find->next, NULL, trigger);
if (iter != NULL && iter != find)
return TRUE;
iter = find_item_with_trigger(menu->list, nth, trigger);
if (iter != NULL && iter != find)
return TRUE;
}
gnt_widget_activate(GNT_WIDGET(menu));
return TRUE;
}
static gboolean
gnt_menu_key_pressed(GntWidget *widget, const char *text)
{
GntMenu *menu = GNT_MENU(widget);
guint current = menu->selected;
if (menu->submenu) {
GntMenu *sub = menu;
do sub = sub->submenu; while (sub->submenu);
if (gnt_widget_key_pressed(GNT_WIDGET(sub), text))
return TRUE;
if (menu->type != GNT_MENU_TOPLEVEL)
return FALSE;
}
if ((text[0] == 27 && text[1] == 0) ||
(menu->type != GNT_MENU_TOPLEVEL && strcmp(text, GNT_KEY_LEFT) == 0)) {
/* Escape closes menu */
GntMenu *par = menu->parentmenu;
if (par != NULL) {
par->submenu = NULL;
gnt_widget_hide(widget);
} else
gnt_widget_hide(widget);
if (par && par->type == GNT_MENU_TOPLEVEL)
gnt_menu_key_pressed(GNT_WIDGET(par), text);
return TRUE;
}
if (menu->type == GNT_MENU_TOPLEVEL) {
GntMenuItem *item;
GList *it;
if (strcmp(text, GNT_KEY_LEFT) == 0) {
do {
if (menu->selected == 0)
menu->selected = g_list_length(menu->list) - 1;
else
menu->selected--;
it = g_list_nth(menu->list, menu->selected);
item = it ? it->data : NULL;
} while (!gnt_menuitem_is_visible(item));
} else if (strcmp(text, GNT_KEY_RIGHT) == 0) {
do {
menu->selected++;
if (menu->selected >= g_list_length(menu->list))
menu->selected = 0;
it = g_list_nth(menu->list, menu->selected);
item = it ? it->data : NULL;
} while (!gnt_menuitem_is_visible(item));
} else if (strcmp(text, GNT_KEY_ENTER) == 0 ||
strcmp(text, GNT_KEY_DOWN) == 0) {
gnt_widget_activate(widget);
}
if (current != menu->selected) {
GntMenu *sub = menu->submenu;
if (sub)
gnt_widget_hide(GNT_WIDGET(sub));
show_submenu(menu);
gnt_widget_draw(widget);
return TRUE;
}
} else {
if (text[1] == '\0') {
if (check_for_trigger(menu, text[0]))
return TRUE;
} else if (strcmp(text, GNT_KEY_RIGHT) == 0) {
GntMenuItem *item = gnt_tree_get_selection_data(GNT_TREE(menu));
if (item && item->submenu) {
menuitem_activate(menu, item);
return TRUE;
}
}
if (gnt_bindable_perform_action_key(GNT_BINDABLE(widget), text))
return TRUE;
return org_key_pressed(widget, text);
}
return gnt_bindable_perform_action_key(GNT_BINDABLE(widget), text);
}
static void
gnt_menu_destroy(GntWidget *widget)
{
GntMenu *menu = GNT_MENU(widget);
g_list_foreach(menu->list, (GFunc)g_object_unref, NULL);
g_list_free(menu->list);
org_destroy(widget);
}
static void
gnt_menu_toggled(GntTree *tree, gpointer key)
{
GntMenuItem *item = GNT_MENU_ITEM(key);
GntMenu *menu = GNT_MENU(tree);
gboolean check = gnt_menuitem_check_get_checked(GNT_MENU_ITEM_CHECK(item));
gnt_menuitem_check_set_checked(GNT_MENU_ITEM_CHECK(item), !check);
gnt_menuitem_activate(item);
while (menu) {
gnt_widget_hide(GNT_WIDGET(menu));
menu = menu->parentmenu;
}
}
static void
gnt_menu_activate(GntWidget *widget)
{
GntMenu *menu = GNT_MENU(widget);
GntMenuItem *item;
if (menu->type == GNT_MENU_TOPLEVEL) {
item = g_list_nth_data(menu->list, menu->selected);
} else {
item = gnt_tree_get_selection_data(GNT_TREE(menu));
}
if (item) {
if (GNT_IS_MENU_ITEM_CHECK(item))
gnt_menu_toggled(GNT_TREE(widget), item);
else
menuitem_activate(menu, item);
}
}
static void
gnt_menu_hide(GntWidget *widget)
{
GntMenu *sub, *menu = GNT_MENU(widget);
while ((sub = menu->submenu))
gnt_widget_hide(GNT_WIDGET(sub));
if (menu->parentmenu)
menu->parentmenu->submenu = NULL;
}
static gboolean
gnt_menu_clicked(GntWidget *widget, GntMouseEvent event, int x, int y)
{
if (GNT_MENU(widget)->type != GNT_MENU_POPUP)
return FALSE;
if (org_clicked && org_clicked(widget, event, x, y))
return TRUE;
gnt_widget_activate(widget);
return TRUE;
}
static void
gnt_menu_class_init(GntMenuClass *klass)
{
GntWidgetClass *wid_class = GNT_WIDGET_CLASS(klass);
parent_class = GNT_TREE_CLASS(klass);
org_destroy = wid_class->destroy;
org_map = wid_class->map;
org_draw = wid_class->draw;
org_key_pressed = wid_class->key_pressed;
org_size_request = wid_class->size_request;
org_clicked = wid_class->clicked;
wid_class->destroy = gnt_menu_destroy;
wid_class->draw = gnt_menu_draw;
wid_class->map = gnt_menu_map;
wid_class->size_request = gnt_menu_size_request;
wid_class->key_pressed = gnt_menu_key_pressed;
wid_class->activate = gnt_menu_activate;
wid_class->hide = gnt_menu_hide;
wid_class->clicked = gnt_menu_clicked;
parent_class->toggled = gnt_menu_toggled;
GNTDEBUG;
}
static void
gnt_menu_init(GTypeInstance *instance, gpointer class)
{
GntWidget *widget = GNT_WIDGET(instance);
GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_NO_SHADOW | GNT_WIDGET_NO_BORDER |
GNT_WIDGET_CAN_TAKE_FOCUS | GNT_WIDGET_TRANSIENT | GNT_WIDGET_DISABLE_ACTIONS);
GNTDEBUG;
}
/******************************************************************************
* GntMenu API
*****************************************************************************/
GType
gnt_menu_get_type(void)
{
static GType type = 0;
if(type == 0)
{
static const GTypeInfo info = {
sizeof(GntMenuClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc)gnt_menu_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof(GntMenu),
0, /* n_preallocs */
gnt_menu_init, /* instance_init */
NULL /* value_table */
};
type = g_type_register_static(GNT_TYPE_TREE,
"GntMenu",
&info, 0);
}
return type;
}
GntWidget *gnt_menu_new(GntMenuType type)
{
GntWidget *widget = g_object_new(GNT_TYPE_MENU, NULL);
GntMenu *menu = GNT_MENU(widget);
menu->list = NULL;
menu->selected = 0;
menu->type = type;
if (type == GNT_MENU_TOPLEVEL) {
widget->priv.x = 0;
widget->priv.y = 0;
} else {
GNT_TREE(widget)->show_separator = FALSE;
g_object_set(G_OBJECT(widget), "columns", NUM_COLUMNS, NULL);
gnt_tree_set_col_width(GNT_TREE(widget), ITEM_TRIGGER, 3);
gnt_tree_set_column_resizable(GNT_TREE(widget), ITEM_TRIGGER, FALSE);
gnt_tree_set_col_width(GNT_TREE(widget), ITEM_SUBMENU, 1);
gnt_tree_set_column_resizable(GNT_TREE(widget), ITEM_SUBMENU, FALSE);
GNT_WIDGET_UNSET_FLAGS(widget, GNT_WIDGET_NO_BORDER);
}
return widget;
}
void gnt_menu_add_item(GntMenu *menu, GntMenuItem *item)
{
menu->list = g_list_append(menu->list, item);
}
GntMenuItem *gnt_menu_get_item(GntMenu *menu, const char *id)
{
GntMenuItem *item = NULL;
GList *iter = menu->list;
if (!id || !*id)
return NULL;
for (; iter; iter = iter->next) {
GntMenu *sub;
item = iter->data;
sub = gnt_menuitem_get_submenu(item);
if (sub) {
item = gnt_menu_get_item(sub, id);
if (item)
break;
} else {
const char *itid = gnt_menuitem_get_id(item);
if (itid && strcmp(itid, id) == 0)
break;
/* XXX: Perhaps look at the menu-label as well? */
}
item = NULL;
}
return item;
}