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/************************************************************************
 * This file is part of trayfreq-archlinux.                             *
 *                                                                      *
 * trayfreq-archlinux 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.                      *
 *                                                                      *
 * trayfreq-archlinux 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 trayfreq-archlinux. If not, see                           *
 * <http://www.gnu.org/licenses/>.                                      *
 ************************************************************************/

#include "tray.h"

#include "getfreq.h"
#include "getcore.h"
#include "getgov.h"
#include "trayfreq_set_interface.h"
#include "bat_tray.h"
#include "defaults.h"
#include "common.h"

#include <glib.h>
#include <gtk/gtk.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <libintl.h>


#define TOOLTIP_TEXT_SIZE 500

GtkStatusIcon* tray;
char tooltip_text[TOOLTIP_TEXT_SIZE];

GtkWidget* menu;
GSList* menu_items;
GtkWidget* checked_menu_item;


/***********************************************************************
 * Handler for when freq is chosen
 **********************************************************************/
static void freq_menu_item_toggled(GtkCheckMenuItem* item, gpointer data)
{
	debug("[checking in]\n");
	if(gtk_check_menu_item_get_active(item))
	{
		checked_menu_item = GTK_WIDGET(item);
		gint freq = GPOINTER_TO_INT(data);
		int i = 0;
		for(i = 0; i < gc_number(); ++i)
			si_freq(freq, i);
	}
}


/***********************************************************************
 * Handler for when governor is chosen
 **********************************************************************/
static void gov_menu_item_toggled(GtkCheckMenuItem* item, gpointer data)
{
	debug("[checking in]\n");
	if(gtk_check_menu_item_get_active(item))
	{
		checked_menu_item = GTK_WIDGET(item);
		char* gov = (char*)data;
		int i = 0;
		for(i = 0; i < gc_number(); ++i)
			si_gov(gov, i);
	}
}
/*
static gboolean governor_exists(gchar* governor)
{
	int i = 0;
	for(i = 0; i < gf_number(); ++i)
	{
		if(g_strcmp0(governor, gg_gov(0, i)) == 0)
			return TRUE;
	}
	return FALSE;
}*/


/***********************************************************************
 * Destroy a menu item
 **********************************************************************/
static void remove_menu_item(GtkWidget* menu_item, gpointer data)
{
	debug("Destroying menu_item\n");
	gtk_widget_destroy(menu_item);
}


/***********************************************************************
 * Remove all items in menu
 **********************************************************************/
static void tray_clear_menu()
{
	debug("Clearing the menu\n");
	GtkContainer* cont = GTK_CONTAINER(menu);
	gtk_container_foreach(cont, remove_menu_item, NULL);
	menu_items = NULL;
}


/***********************************************************************
 * Create new instance of gtk_tray_new for gov/freq tray
 **********************************************************************/
static void tray_init_menu()
{
	debug("Spawning new menu");
	menu = gtk_menu_new();
}

/***********************************************************************
 * Populate gtk menu object with all the entries
 **********************************************************************/
static void tray_generate_menu()
{
	tray_clear_menu();
	gg_init();

	char label[20];
	int i = 0;

	char current_governor[20];
	memset(current_governor, '\0', sizeof(current_governor) );
	gg_current(0, current_governor, sizeof(current_governor) );

	gint current_frequency = gf_current(0);

	// Add available frequencies
	for(i = 0; i < gf_number(); ++i)
	{
		memset(label, '\0', 20);
		gf_get_frequency_label(gf_freqi(0, i), label);
		debug("Got freq label '%s', i=%d\n",label,i);

		GtkWidget* item = gtk_radio_menu_item_new_with_label(menu_items, label);
		menu_items = gtk_radio_menu_item_get_group(GTK_RADIO_MENU_ITEM (item));

		if(g_strcmp0(current_governor, "userspace") == 0 && gf_freqi(0, i) == current_frequency)
		{
			debug("This freq is current freq, ticking radio button\n");
			gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(item), TRUE);
		}

		debug("Setting connection/callback\n");
		g_signal_connect(G_OBJECT(item), "toggled", GTK_SIGNAL_FUNC(freq_menu_item_toggled), GINT_TO_POINTER(gf_freqi(0, i)));
		
		debug("Adding item to menu\n");
		gtk_menu_shell_append(GTK_MENU_SHELL(menu), item);
	}

	// Add a seperator
	debug("Adding separator\n");
	GtkWidget* seperator = gtk_separator_menu_item_new();
	gtk_menu_append(menu, seperator);

	// Add available governors
	for(i = 0; i < gg_number(); i++)
	{
		if(g_strcmp0(gg_gov(0, i), "userspace") == 0)
		{
			debug("Gov is userspace, not adding\n");
			continue;
		}

		GtkWidget* item = gtk_radio_menu_item_new_with_label(menu_items, gg_gov(0, i));
		menu_items = gtk_radio_menu_item_get_group(GTK_RADIO_MENU_ITEM (item));

		if(g_strcmp0(gg_gov(0, i), current_governor) == 0)
		{
			debug("Governor is current one, ticking radio button\n");
			gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(item), TRUE);
		}
		
		debug("Adding callback");
		g_signal_connect(G_OBJECT(item), "toggled", GTK_SIGNAL_FUNC(gov_menu_item_toggled), gg_gov(0, i));
		
		debug("Adding item to menu\n");
		gtk_menu_shell_append(GTK_MENU_SHELL(menu), item);
	}
	debug("Showing menu\n");
	gtk_widget_show_all(menu);
}

/***********************************************************************
 * Refresh the tooltip message
 **********************************************************************/
static gboolean update_tooltip(GtkStatusIcon* status_icon,gint x,gint y,gboolean keyboard_mode,GtkTooltip* tooltip,gpointer data)
{
	char msg[TOOLTIP_TEXT_SIZE];
	char current_governor[20];
	char label[20];
	int i = 0;

	memset(msg, '\0', sizeof(msg));
	memset(current_governor, '\0', sizeof(current_governor) );

	gg_current(0, current_governor, sizeof(current_governor) );
	sprintf(msg+strlen(msg), _("Governor: %s\n"), current_governor);

	for(i = 0; i < gc_number(); ++i)
	{
		debug("Adding CPU%i's frequency\n",i);
		memset(label, '\0', sizeof(label));
		gf_get_frequency_label(gf_current(i), label);
		sprintf(msg+strlen(msg), _("CPU%i: %s%s"), i, label, i == gc_number()-1 ? "" : "\n");
	}

	debug("Setting tooltip text\n");
	tray_set_tooltip(msg);
	gtk_tooltip_set_text(tooltip, tooltip_text);

	return TRUE;
}


/***********************************************************************
 * Handler for spawning the popup/context menu
 **********************************************************************/
static void popup_menu(GtkStatusIcon* statuc_icon,guint button,guint activate_time,gpointer data)
{
	debug("Spawning popup menu\n");
	tray_generate_menu();
	gtk_menu_popup(GTK_MENU(menu),NULL,NULL,gtk_status_icon_position_menu,tray,button,activate_time);
}


/***********************************************************************
 * Update the freq/gov tray icon
 **********************************************************************/
static gboolean update_icon(gpointer user_data)
{
	int i;
	switch ( get_battery_state() )
	{
		case STATE_DISCHARGING:
			debug("Discharging\n");
			if(_DEFAULT_BAT_GOV)
			{
				for(i = 0; i < gc_number(); ++i)
					si_gov(_DEFAULT_BAT_GOV, i);
			}
			break;

		case STATE_CHARGING:
		case STATE_FULL:
			debug("Charging/Full\n");
			if(_DEFAULT_AC_GOV)
			{
				for(i = 0; i < gc_number(); ++i)
					si_gov(_DEFAULT_AC_GOV, i);
			}

			break;
	}

	debug("Updating icon\n");
	tray_update_icon_percent();
	return TRUE;
}


/***********************************************************************
 * Apply default gov/freq for current situation
 **********************************************************************/
void tray_set_defaults()
{
	// Set defaults
	int i = 0;
	if(_DEFAULT_GOV)
	{
		for(i = 0; i < gc_number(); ++i)
			si_gov(_DEFAULT_GOV, i);

	} else {
		for(i = 0; i < gc_number(); ++i)
			si_gov("ondemand", i);
	}

	if(_DEFAULT_FREQ)
	{
		for(i = 0; i < gc_number(); ++i)
			si_freq(atoi(_DEFAULT_FREQ), i);
	}

}


/***********************************************************************
 * Start the tray icon thingy
 **********************************************************************/
void tray_init()
{
	tray_set_defaults();
	tray = gtk_status_icon_new();
	char* icon_file = g_strconcat(_DEFAULT_THEME, "/cpufreq-0.png", NULL);

	debug("Setting icon to '%s'\n",icon_file);
	gtk_status_icon_set_from_file(tray, icon_file);
	gtk_status_icon_set_has_tooltip(tray, TRUE);

	debug("Setting up callbacks\n");
	g_signal_connect(G_OBJECT(tray), "query-tooltip", GTK_SIGNAL_FUNC(update_tooltip), NULL);
	g_signal_connect(G_OBJECT(tray), "popup-menu", GTK_SIGNAL_FUNC(popup_menu), NULL);

	debug("Adding timeout\n");
	g_timeout_add(1000, update_icon, NULL);
	tray_init_menu();
}


/***********************************************************************
 * Set the tooltip message
 **********************************************************************/
void tray_set_tooltip(const char* msg)
{
	debug("Setting up toolip var with text '%s'\n",msg);
	memset(tooltip_text, '\0', TOOLTIP_TEXT_SIZE);
	memmove(tooltip_text, msg, strlen(msg));
}

/**********************************************************************
 * Set icon based on current freq/governor
 **********************************************************************/
void tray_update_icon_percent()
{
	gulong max_frequency = gf_freqi(0, 0);
	gint adjusted_percent = 0;
	// If no governor, set percentage to 0. This if statement fixes an FPE a few lines down
	if (gg_number() == 0)
	{
		adjusted_percent = 0;
	} else {
		// Percentages need to be {25,50,75,100}. Round to one of these numbers.
		// TO DO: round instead of lots of ifs
		gint percent = (gf_current(0) * 100)/max_frequency;
		if(percent == 100) {
			adjusted_percent = 100;
		} else if(percent >= 65.5) {
			adjusted_percent