alerts.c

系统任务管理器

/* GKrellM
|  Copyright (C) 1999-2006 Bill Wilson
|
|  Author:  Bill Wilson    [e-mail]
|  Latest versions might be found at:  http://gkrellm.net
|
|  This program is free software which I release under the GNU General Public
|  License. You may redistribute and/or modify this program under the terms
|  of that 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.  Version 2 is in the
|  COPYRIGHT file in the top level directory of this distribution.
| 
|  To get a copy of the GNU General Puplic License, write to the Free Software
|  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/


#include "gkrellm.h"
#include "gkrellm-private.h"

#include <math.h>

static GList	*gkrellm_alert_list,
				*alert_plugin_list;


static void
run_command(GkrellmAlert *alert, gchar *command)
	{
	gchar	cmd[1024];

	if (!command || !*command)
		return;
	if (alert->cb_command_process)
		(*alert->cb_command_process)(alert, command, cmd, sizeof(cmd),
				alert->cb_command_process_data);
	else
		snprintf(cmd, sizeof(cmd), "%s", command);
	g_spawn_command_line_async(cmd, NULL);
	}

void
gkrellm_render_default_alert_decal(GkrellmAlert *alert)
	{
	GkrellmPiximage	*im;
	GkrellmAlertdecal		*ad;

	if (!alert)
		return;
	ad = &alert->ad;
	if (ad->w <= 0 || ad->h <= 0)
		return;
	if (alert->high.alarm_on || alert->low.alarm_on)
		gkrellm_get_decal_alarm_piximage(&im, &ad->nframes);
	else if (alert->high.warn_on || alert->low.warn_on)
		gkrellm_get_decal_warn_piximage(&im, &ad->nframes);
	else
		return;
	gkrellm_scale_piximage_to_pixmap(im, &ad->pixmap, &ad->mask, ad->w,
				ad->h * ad->nframes);
	}

gboolean
gkrellm_alert_decal_visible(GkrellmAlert *alert)
	{
	if (alert && alert->ad.decal)
		return TRUE;
	return FALSE;
	}

static gboolean
create_alert_objects(GkrellmAlert *alert)
	{
	GkrellmAlertdecal		*ad;
//	GkrellmKrell			*k;

	/* Whichever monitor created the alert that is being triggered:
	|  1) has set a panel pointer in the create and is done, so I will make
	|     here a default panel sized alert decal for him, or
	|  2) has not set a panel ptr, but will do so in the callback and then
	|     let me make the default alert, or
	|  3) has done one of the 2 above panel possibilities, and will also
	|     render a custom size/position for the alert decal and set the pixmap.
	|     For this case, the alert decal may be a render of the default decal
	|     image or may be a custom image from the monitor.  The work needed is
	|     setting ad x,y,w,h and nframes and rendering to ad->pixmap.
	*/
	if (alert->cb_trigger)
		(*alert->cb_trigger)(alert, alert->cb_trigger_data);
	if (!alert->panel)
		return FALSE;		/* Monitor may need trigger deferred */
	ad = &alert->ad;
	if (!alert->ad.pixmap /* && style is decal alert */)
		{
		ad->x = 0;
		ad->y = 0;
		ad->w = alert->panel->w;
		ad->h = alert->panel->h;
		gkrellm_render_default_alert_decal(alert);
		}
	/* Don't let create_decal append the decal, I want to insert it first so
	|  it will appear under all other panel decals.
	*/
	ad->decal = gkrellm_create_decal_pixmap(NULL, ad->pixmap, ad->mask,
				ad->nframes, NULL, ad->x, ad->y);
	gkrellm_insert_decal(alert->panel, ad->decal, FALSE /* prepend */);

#if 0
	k = gkrellm_create_krell(NULL,
			gkrellm_krell_mini_piximage(), gkrellm_krell_mini_style());
	k->y0 = 5;
	k->full_scale = 100;

	alert->ak.krell = k;
	gkrellm_insert_krell(alert->panel, k, TRUE);
#endif
	return TRUE;
	}

static void
destroy_alert_objects(GkrellmAlert *alert)
	{
	gkrellm_destroy_decal(alert->ad.decal);
	if (alert->ad.pixmap)
		g_object_unref(G_OBJECT(alert->ad.pixmap));
	alert->ad.pixmap = NULL;
	alert->ad.mask = NULL;
	alert->ad.decal = NULL;
	gkrellm_destroy_krell(alert->ak.krell);
	alert->ak.krell = NULL;
	}

static void
plugin_warn(GkrellmAlert *alert, gboolean state)
	{
	GList					*list;
	GkrellmAlertPlugin		*gap;
	GkrellmAlertPluginLink	*apl;

	for (list = alert->plugin_list; list; list = list->next)
		{
		apl = (GkrellmAlertPluginLink *) list->data;
		gap = apl->alert_plugin;
		if (MONITOR_ENABLED(gap->mon) && gap->warn_func)
			(*gap->warn_func)(alert, apl->data, state);
		}
	}

static void
plugin_alarm(GkrellmAlert *alert, gboolean state)
	{
	GList					*list;
	GkrellmAlertPlugin		*gap;
	GkrellmAlertPluginLink	*apl;

	for (list = alert->plugin_list; list; list = list->next)
		{
		apl = (GkrellmAlertPluginLink *) list->data;
		gap = apl->alert_plugin;
		if (MONITOR_ENABLED(gap->mon) && gap->alarm_func)
			(*gap->alarm_func)(alert, apl->data, state);
		}
	}

static void
trigger_warn(GkrellmAlert *alert, GkrellmTrigger *trigger)
	{
	if (!trigger->warn_on)
		{
		trigger->warn_on = TRUE;
		create_alert_objects(alert);
		gkrellm_alert_list = g_list_append(gkrellm_alert_list, alert);
		if (!alert->suppress_command)
			{
			run_command(alert, alert->warn_command);
			plugin_warn(alert, ON);
			}
		alert->suppress_command = FALSE;
		alert->warn_repeat = alert->warn_repeat_set;
		}
	}

static void
stop_warn(GkrellmAlert *alert, GkrellmTrigger *trigger)
	{
	if (trigger->warn_on)
		{
		plugin_warn(alert, OFF);
		trigger->warn_on = FALSE;
		destroy_alert_objects(alert);
		gkrellm_alert_list = g_list_remove(gkrellm_alert_list, alert);
		alert->warn_repeat = 0;
		alert->suppress_command = FALSE;
		}
	}

static void
trigger_alarm(GkrellmAlert *alert, GkrellmTrigger *trigger)
	{
	if (!trigger->alarm_on)
		{
		trigger->alarm_on = TRUE;
		trigger->warn_delay = 0;
		create_alert_objects(alert);
		gkrellm_alert_list = g_list_append(gkrellm_alert_list, alert);
		if (!alert->suppress_command)
			{
			run_command(alert, alert->alarm_command);
			plugin_alarm(alert, ON);
			}
		alert->suppress_command = FALSE;
		alert->alarm_repeat = alert->alarm_repeat_set;
		}
	}

static void
stop_alarm(GkrellmAlert *alert, GkrellmTrigger *trigger)
	{
	if (trigger->alarm_on)
		{
		plugin_alarm(alert, OFF);
		trigger->alarm_on = FALSE;
		destroy_alert_objects(alert);
		gkrellm_alert_list = g_list_remove(gkrellm_alert_list, alert);
		alert->alarm_repeat = 0;;
		alert->suppress_command = FALSE;
		}
	}

void
gkrellm_freeze_alert(GkrellmAlert *alert)
	{
	if (alert)
		alert->freeze = TRUE;
	}

void
gkrellm_thaw_alert(GkrellmAlert *alert)
	{
	if (alert)
		alert->freeze = FALSE;
	}

static gboolean
check_high_alarm_limit(GkrellmAlert *alert, gfloat value)
	{
	GkrellmTrigger	*trigger = &alert->high;

	if (value < trigger->alarm_limit)
		{
		trigger->alarm_delay = alert->delay;
		return FALSE;
		}
	if (trigger->alarm_delay == 0)
		{
		if (trigger->warn_delay > 0)
			trigger->warn_delay -= 1;
		return TRUE;
		}
	trigger->alarm_delay -= 1;
	return FALSE;
	}

static gboolean
check_high_warn_limit(GkrellmAlert *alert, gfloat value)
	{
	GkrellmTrigger	*trigger = &alert->high;

	if (value < trigger->warn_limit)
		{
		trigger->warn_delay = alert->delay;
		return FALSE;
		}
	if (trigger->warn_delay == 0)
		return TRUE;
	trigger->warn_delay -= 1;
	return FALSE;
	}

static gboolean
check_low_warn_limit(GkrellmAlert *alert, gfloat value)
	{
	GkrellmTrigger	*trigger = &alert->low;

	if (value > trigger->warn_limit)
		{
		trigger->warn_delay = alert->delay;
		return FALSE;
		}
	if (trigger->warn_delay == 0)
		return TRUE;
	trigger->warn_delay -= 1;
	return FALSE;
	}

static gboolean
check_low_alarm_limit(GkrellmAlert *alert, gfloat value)
	{
	GkrellmTrigger	*trigger = &alert->low;

	if (value > trigger->alarm_limit)
		{
		trigger->alarm_delay = alert->delay;
		return FALSE;
		}
	if (trigger->alarm_delay == 0)
		{
		if (trigger->warn_delay > 0)
			trigger->warn_delay -= 1;
		return TRUE;
		}
	trigger->alarm_delay -= 1;
	return FALSE;
	}

void
gkrellm_check_alert(GkrellmAlert *alert, gfloat value)
	{
	GList					*plist;
	GkrellmAlertPlugin		*gap;
	GkrellmAlertPluginLink	*apl;

	if (!alert || !alert->activated || alert->freeze || !_GK.initialized)
		return;

	if (alert->delay == 0 || GK.second_tick)
		{
		if (alert->check_low)
			{
			if (check_low_alarm_limit(alert, value))
				{				
				stop_alarm(alert, &alert->high);
				stop_warn(alert, &alert->high);
				stop_warn(alert, &alert->low);
				trigger_alarm(alert, &alert->low);
				}
			else
				{
				stop_alarm(alert, &alert->low);
				if (check_low_warn_limit(alert, value))
					{
					stop_alarm(alert, &alert->high);
					stop_warn(alert, &alert->high);
					trigger_warn(alert, &alert->low);
					}
				else
					stop_warn(alert, &alert->low);
				}
			}
		if (alert->check_high)
			{
			if (check_high_alarm_limit(alert, value))
				{
				stop_warn(alert, &alert->high);
				stop_warn(alert, &alert->low);
				stop_alarm(alert, &alert->low);
				trigger_alarm(alert, &alert->high);
				}
			else
				{
				stop_alarm(alert, &alert->high);
				if (check_high_warn_limit(alert, value))
					{
					stop_warn(alert, &alert->low);
					stop_alarm(alert, &alert->low);
					trigger_warn(alert, &alert->high);
					}
				else
					stop_warn(alert, &alert->high);
				}
			}
		}

	for (plist = alert->plugin_list; plist; plist = plist->next)
		{
		apl = (GkrellmAlertPluginLink *) plist->data;
		gap = apl->alert_plugin;
		if (MONITOR_ENABLED(gap->mon) && gap->check_func)
			(*gap->check_func)(alert, apl->data, value);
		}
	}

void
gkrellm_alert_trigger_connect(GkrellmAlert *alert, void (*func)(),
			gpointer data)
	{
	if (!alert)
		return;
	alert->cb_trigger = func;
	alert->cb_trigger_data = data;
	}

void
gkrellm_alert_stop_connect(GkrellmAlert *alert, void (*func)(), gpointer data)
	{
	if (!alert)
		return;
	alert->cb_stop = func;
	alert->cb_stop_data = data;
	}

static void
destroy_alert(GkrellmAlert *alert)
	{
	GList					*plist, *list;
	GkrellmAlertPlugin		*gap;
	GkrellmAlertPluginLink	*apl;
	gpointer				data;

	if (!alert)
		return;
	if (g_list_find(gkrellm_alert_list, alert))
		{
		gkrellm_alert_list = g_list_remove(gkrellm_alert_list, alert);
		destroy_alert_objects(alert);
		}

	for (plist = alert_plugin_list; plist; plist = plist->next)
		{
		data = NULL;
		gap = (GkrellmAlertPlugin *) plist->data;
		for (list = alert->plugin_list; list; list = list->next)
			{
			apl = (GkrellmAlertPluginLink *) list->data;
			if (apl->alert_plugin == gap)
				{
				data = apl->data;
				break;
				}
			}
		if (MONITOR_ENABLED(gap->mon) && gap->destroy_func)
			(*gap->destroy_func)(alert, data);
		}
	gkrellm_free_glist_and_data(&alert->plugin_list);	/* should all be detached */
	g_free(alert->name);
	g_free(alert->unit_string);
	g_free(alert->alarm_command);
	g_free(alert->warn_command);
	g_free(alert->id_string);
	g_free(alert);
	}

void
gkrellm_alert_destroy(GkrellmAlert **ap)
	{
	if (!ap || !*ap)
		return;
	gkrellm_alert_window_destroy(ap);
	destroy_alert(*ap);
	*ap = NULL;
	}

GkrellmAlert *
gkrellm_alert_create(GkrellmPanel *p, gchar *name, gchar *unit_string,
		gboolean check_high, gboolean check_low, gboolean do_updates,
		gfloat max_high, gfloat min_low,
		gfloat step0, gfloat step1, gint digits)
	{
	GkrellmAlert	*alert;

	alert = g_new0(GkrellmAlert, 1);
	alert->panel = p;
	alert->name = g_strdup(name);
	alert->unit_string = g_strdup(unit_string);
	alert->check_high = check_high;
	alert->check_low = check_low;
	alert->do_panel_updates = do_updates;
	alert->max_high = max_high;
	alert->min_low = min_low;
	alert->step0 = step0;
	alert->step1 = step1;
	alert->digits = digits;

	alert->alarm_command = g_strdup("");
	alert->warn_command = g_strdup("");
	alert->do_alarm_command = alert->do_warn_command = TRUE;

	gkrellm_alert_set_triggers(alert, min_low, min_low, min_low, min_low);
	alert->activated = FALSE;
	alert->check_hardwired = FALSE;

	return alert;
	}

  /* Set alarm trigger values for hardwired alarms which have no config
  */
void
gkrellm_alert_set_triggers(GkrellmAlert *alert,
				gfloat high_alarm, gfloat high_warn,
				gfloat low_warn, gfloat low_alarm)
	{
	if (alert->check_high)
		{
		alert->high.alarm_limit = high_alarm;
		alert->high.warn_limit = high_warn;
		}
	if (alert->check_low)
		{
		alert->low.warn_limit = low_warn;
		alert->low.alarm_limit = low_alarm;
		}
	alert->activated = TRUE;
	alert->check_hardwired = TRUE;
	}


void
gkrellm_alert_commands_config(GkrellmAlert *alert,
						gboolean alarm, gboolean warn)
	{
	alert->do_alarm_command = alarm;
	alert->do_warn_command = warn;
	}

void
gkrellm_alert_set_delay(GkrellmAlert *alert, gint delay)
	{
	if (!alert)
		return;
	alert->delay = delay;
	alert->low.warn_delay = alert->low.alarm_delay = delay;
	alert->high.warn_delay = alert->high.alarm_delay = delay;