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/*
* Copyright (C) 2008 Hong Jen Yee (PCMan) <pcman.tw@gmail.com>
* 2008 Fred Chien <fred@lxde.org>
* 2009 Marty Jack <martyj19@comcast.net>
* 2012 Michael Rawson <michaelrawson76@gmail.com>
* 2012 Julien Lavergne <julien.lavergne@gmail.com>
* 2014 Andriy Grytsenko <andrej@rep.kiev.ua>
*
* This file is a part of LXPanel project.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "plugin.h"
#include "misc.h"
#include <gtk/gtk.h>
#include <gdk/gdk.h>
#include <gdk/gdkx.h>
#include <glib/gi18n.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <string.h>
#include <X11/XKBlib.h>
#include "icon-grid.h"
static const char * on_icons_theme[] = {
"capslock-on",
"numlock-on",
"scrllock-on"
};
static const char * off_icons_theme[] = {
"capslock-off",
"numlock-off",
"scrllock-off"
};
static int xkb_event_base = 0;
static int xkb_error_base = 0;
/* Private context for keyboard LED plugin. */
typedef struct {
config_setting_t *settings;
GtkWidget *indicator_image[3]; /* Image for each indicator */
unsigned int current_state; /* Current LED state, bit encoded */
gboolean visible[3]; /* True if control is visible (per user configuration) */
} KeyboardLEDPlugin;
static void kbled_update_image(KeyboardLEDPlugin * kl, int i, unsigned int state);
static void kbled_update_display(KeyboardLEDPlugin * kl, unsigned int state);
static void kbled_destructor(gpointer user_data);
/* Update image to correspond to current state. */
static void kbled_update_image(KeyboardLEDPlugin * kl, int i, unsigned int state)
{
lxpanel_image_change_icon(kl->indicator_image[i],
(state ? on_icons_theme[i] : off_icons_theme[i]),
NULL);
}
/* Redraw after Xkb event or initialization. */
static void kbled_update_display(KeyboardLEDPlugin * kl, unsigned int new_state)
{
int i;
for (i = 0; i < 3; i++)
{
/* If the control changed state, redraw it. */
int current_is_lit = kl->current_state & (1 << i);
int new_is_lit = new_state & (1 << i);
if (current_is_lit != new_is_lit)
kbled_update_image(kl, i, new_is_lit);
}
/* Save new state. */
kl->current_state = new_state;
}
/* GDK event filter. */
static GdkFilterReturn kbled_event_filter(GdkXEvent * gdkxevent, GdkEvent * event, KeyboardLEDPlugin * kl)
{
/* Look for XkbIndicatorStateNotify events and update the display. */
XEvent * xev = (XEvent *) gdkxevent;
if (xev->xany.type == xkb_event_base + XkbEventCode)
{
XkbEvent * xkbev = (XkbEvent *) xev;
if (xkbev->any.xkb_type == XkbIndicatorStateNotify)
kbled_update_display(kl, xkbev->indicators.state);
}
return GDK_FILTER_CONTINUE;
}
/* Plugin constructor. */
static GtkWidget *kbled_constructor(LXPanel *panel, config_setting_t *settings)
{
/* Allocate and initialize plugin context and set into Plugin private data pointer. */
KeyboardLEDPlugin * kl = g_new0(KeyboardLEDPlugin, 1);
GtkWidget *p;
int i;
unsigned int current_state;
Display *xdisplay = GDK_DISPLAY_XDISPLAY(gdk_display_get_default());
kl->settings = settings;
kl->visible[0] = FALSE;
kl->visible[1] = TRUE;
kl->visible[2] = TRUE;
/* Load parameters from the configuration file. */
if (config_setting_lookup_int(settings, "ShowCapsLock", &i))
kl->visible[0] = i != 0;
if (config_setting_lookup_int(settings, "ShowNumLock", &i))
kl->visible[1] = i != 0;
if (config_setting_lookup_int(settings, "ShowScrollLock", &i))
kl->visible[2] = i != 0;
/* Allocate top level widget and set into Plugin widget pointer. */
p = panel_icon_grid_new(panel_get_orientation(panel),
panel_get_icon_size(panel),
panel_get_icon_size(panel),
1, 0, panel_get_height(panel));
lxpanel_plugin_set_data(p, kl, kbled_destructor);
/* Then allocate three images for the three indications, but make them visible only when the configuration requests. */
for (i = 0; i < 3; i++)
{
kl->indicator_image[i] = lxpanel_image_new_for_icon(panel, off_icons_theme[i], -1, NULL);
gtk_container_add(GTK_CONTAINER(p), kl->indicator_image[i]);
gtk_widget_set_visible(kl->indicator_image[i], kl->visible[i]);
}
/* Initialize Xkb extension if not yet done. */
if (xkb_event_base == 0)
{
int opcode;
int maj = XkbMajorVersion;
int min = XkbMinorVersion;
if ( ! XkbLibraryVersion(&maj, &min))
return 0;
if ( ! XkbQueryExtension(xdisplay, &opcode, &xkb_event_base, &xkb_error_base, &maj, &min))
return 0;
}
/* Add GDK event filter and enable XkbIndicatorStateNotify events. */
gdk_window_add_filter(NULL, (GdkFilterFunc) kbled_event_filter, kl);
if ( ! XkbSelectEvents(xdisplay, XkbUseCoreKbd, XkbIndicatorStateNotifyMask, XkbIndicatorStateNotifyMask))
return 0;
/* Get current indicator state and update display.
* Force current state to differ in all bits so a full redraw will occur. */
XkbGetIndicatorState(xdisplay, XkbUseCoreKbd, ¤t_state);
kl->current_state = ~ current_state;
kbled_update_display(kl, current_state);
/* Show the widget. */
return p;
}
/* Plugin destructor. */
static void kbled_destructor(gpointer user_data)
{
KeyboardLEDPlugin * kl = (KeyboardLEDPlugin *) user_data;
/* Remove GDK event filter. */
gdk_window_remove_filter(NULL, (GdkFilterFunc) kbled_event_filter, kl);
g_free(kl);
}
/* Callback when the configuration dialog has recorded a configuration change. */
static gboolean kbled_apply_configuration(gpointer user_data)
{
KeyboardLEDPlugin * kl = lxpanel_plugin_get_data(user_data);
int i;
for (i = 0; i < 3; i++)
gtk_widget_set_visible(kl->indicator_image[i], kl->visible[i]);
config_group_set_int(kl->settings, "ShowCapsLock", kl->visible[0]);
config_group_set_int(kl->settings, "ShowNumLock", kl->visible[1]);
config_group_set_int(kl->settings, "ShowScrollLock", kl->visible[2]);
return FALSE;
}
/* Callback when the configuration dialog is to be shown. */
static GtkWidget *kbled_configure(LXPanel *panel, GtkWidget *p)
{
KeyboardLEDPlugin * kl = lxpanel_plugin_get_data(p);
GtkWidget * dlg = lxpanel_generic_config_dlg(_("Keyboard LED"),
panel, kbled_apply_configuration, p,
_("Show CapsLock"), &kl->visible[0], CONF_TYPE_BOOL,
_("Show NumLock"), &kl->visible[1], CONF_TYPE_BOOL,
_("Show ScrollLock"), &kl->visible[2], CONF_TYPE_BOOL,
NULL);
gtk_widget_set_size_request(GTK_WIDGET(dlg), 200, -1); /* Improve geometry */
return dlg;
}
/* Callback when panel configuration changes. */
static void kbled_panel_configuration_changed(LXPanel *panel, GtkWidget *p)
{
/* Set orientation into the icon grid. */
KeyboardLEDPlugin * kl = lxpanel_plugin_get_data(p);
panel_icon_grid_set_geometry(PANEL_ICON_GRID(p), panel_get_orientation(panel),
panel_get_icon_size(panel),
panel_get_icon_size(panel),
1, 0, panel_get_height(panel));
/* Do a full redraw. */
int current_state = kl->current_state;
kl->current_state = ~ kl->current_state;
kbled_update_display(kl, current_state);
}
FM_DEFINE_MODULE(lxpanel_gtk, kbled)
/* Plugin descriptor. */
LXPanelPluginInit fm_module_init_lxpanel_gtk = {
.name = N_("Keyboard LED"),
.description = N_("Indicators for CapsLock, NumLock, and ScrollLock keys"),
.new_instance = kbled_constructor,
.config = kbled_configure,
.reconfigure = kbled_panel_configuration_changed
};
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