+/*
+ * Load applet - Maemo5 edition - status area plugin
+ */
+
+
+#include <gtk/gtk.h>
+#include <hildon/hildon.h>
+#include <glib/gerror.h>
+#include <glib.h>
+#include <string.h>
+#include <libosso.h>
+
+#include "la_status_area_item.h"
+
+#define LA_ICON_WIDTH 16
+#define LA_ICON_HEIGHT 16
+#define LA_BOX_WIDTH 5
+#define LA_BOX_HEIGHT 3
+#define LA_CPU_MAX 5
+
+
+
+#define LOAD_APPLET_STATUS_AREA_ITEM_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE (obj, LOAD_APPLET_TYPE_STATUS_AREA_ITEM, LoadAppletStatusAreaItemPrivate))
+
+struct _LoadAppletStatusAreaItemPrivate {
+ guint timeout_id;
+ gint lastU, lastN, lastIO, lastI;
+ guchar last_mem_level;
+ guchar last_cpu_level;
+ GdkPixbuf *pixbuf;
+ GdkPixbuf *pixbuf_on;
+ GdkPixbuf *pixbuf_red;
+ GdkPixbuf *pixbuf_off;
+ osso_context_t *osso;
+ gboolean red;
+};
+
+HD_DEFINE_PLUGIN_MODULE (LoadAppletStatusAreaItem, load_applet_status_area_item, HD_TYPE_STATUS_PLUGIN_ITEM);
+
+
+/*
+ * Read current MEM usage and return indicator between 5 and 1 - how many bars are "full"
+ */
+static guchar
+la_check_mem (LoadAppletStatusAreaItemPrivate *priv)
+{
+ #define MEMFILE "/proc/meminfo"
+ #define MAX_READ_CHARS 128
+ char read_buffer[MAX_READ_CHARS];
+ FILE *fin;
+ int mem_used = 0;
+ int mem_total = 0;
+ int mem_cached = 0;
+ int mem_buffers = 0;
+ int mem_free = 0;
+
+ //Open the memory info file and get current free memory
+ fin = fopen(MEMFILE, "r");
+ if (fin == NULL) {
+ g_warning("Can't open "MEMFILE"\n");
+ return TRUE;
+ }
+ while (fgets(read_buffer, MAX_READ_CHARS, fin) != NULL) {
+ if (strncmp(read_buffer, "MemTotal", 8) == 0) {
+ sscanf(read_buffer + 10, "%d", &mem_total);
+ } else if (strncmp(read_buffer, "MemFree", 6) == 0) {
+ sscanf(read_buffer + 9, "%d", &mem_free);
+ } else if (strncmp(read_buffer, "Buffers", 6) == 0) {
+ sscanf(read_buffer + 9, "%d", &mem_buffers);
+ } else if (strncmp(read_buffer, "Cached", 6) == 0) {
+ sscanf(read_buffer + 8, "%d", &mem_cached);
+ break;
+ }
+ }
+ fclose(fin);
+
+ mem_used = mem_total - mem_free - mem_buffers - mem_cached;
+
+ if (mem_used > 0.9*mem_total)
+ return 5;
+ else if (mem_used > 0.7*mem_total)
+ return 4;
+ else if (mem_used > 0.5*mem_total)
+ return 3;
+ else if (mem_used > 0.3*mem_total)
+ return 2;
+ else
+ return 1;
+}
+
+
+/*
+ * Read current CPU usage and return indicator between 5 and 1 - how many bars are "full"
+ */
+static guchar
+la_check_cpu (LoadAppletStatusAreaItemPrivate *priv)
+{
+ #define CPUFILE "/proc/stat"
+ gint curU, curN, curIO, curI;
+ gint deltaU, deltaN, deltaIO, deltaI;
+ int load, idle;
+ GError *error = NULL;
+ gchar *contents;
+ gsize lenght;
+ gchar **splits;
+
+ if (!g_file_get_contents (CPUFILE, &contents, &lenght, &error)) {
+ fprintf (stderr, "ERR: can't read file %s: %s\n", CPUFILE, error->message);
+ g_error_free (error);
+ return 0;
+ }
+
+ splits = g_strsplit_set (contents, " ", -1);
+
+ sscanf(splits[2], "%d", &curU);
+ sscanf(splits[3], "%d", &curN);
+ sscanf(splits[4], "%d", &curIO);
+ sscanf(splits[5], "%d", &curI);
+
+ g_strfreev (splits);
+ g_free (contents);
+
+ idle = (curI - priv->lastI);
+ if (idle == 0) load = 100;
+ else load = 100-idle;
+ if (load>100) load = 0;
+ deltaU = curU - priv->lastU;
+ deltaN = curN - priv->lastN;
+ deltaIO = curIO - priv->lastIO;
+ deltaI = curI - priv->lastI;
+ priv->lastU = curU;
+ priv->lastN = curN;
+ priv->lastIO = curIO;
+ priv->lastI = curI;
+
+ if (load > 90)
+ return 5;
+ else if (load > 70)
+ return 4;
+ else if (load > 45)
+ return 3;
+ else if (load > 19)
+ return 2;
+ else
+ return 1;
+}
+
+
+
+/*
+ * Compose and blit the current status of memory bars
+ */
+static void
+la_blit_memory_bars (const guchar level, LoadAppletStatusAreaItemPrivate *priv)
+{
+ guint x, y;
+
+ gdk_pixbuf_fill(priv->pixbuf, 0x00000000);
+
+ x = 9;
+ y = 1;
+ if (level > 4)
+ gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
+ y = 5;
+ if (level > 3)
+ gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
+ y = 9;
+ if (level > 2)
+ gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
+ y = 13;
+ if (level > 1)
+ gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
+ else
+ gdk_pixbuf_composite(priv->pixbuf_off, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
+}
+
+
+/*
+ * Compose and blit current status of CPU bars
+ */
+static void
+la_blit_cpu_bars (const guchar level, LoadAppletStatusAreaItemPrivate *priv)
+{
+ guint x, y;
+
+ x = 2;
+ y = 1;
+ if (level > 4)
+ {
+ if (priv->red == TRUE) {
+ gdk_pixbuf_composite(priv->pixbuf_red, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
+ priv->red = FALSE;
+ } else {
+ gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
+ priv->red = TRUE;
+ }
+ }
+ y = 5;
+ if (level > 3)
+ gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
+ y = 9;
+ if (level > 2)
+ gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
+ y = 13;
+ if (level > 1)
+ gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
+ else
+ gdk_pixbuf_composite(priv->pixbuf_off, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
+}
+
+
+/*
+ * Ran to check and update the CPU and memory reading
+ */
+static gboolean
+la_check_load (gpointer data)
+{
+ guchar current_cpu_level;
+ guchar current_mem_level;
+ LoadAppletStatusAreaItem *item = (LoadAppletStatusAreaItem*)data;
+ LoadAppletStatusAreaItemPrivate *priv = (LoadAppletStatusAreaItemPrivate*)item->priv;
+
+ current_cpu_level = la_check_cpu(priv);
+ current_mem_level = la_check_mem(priv);
+ //g_debug(g_strdup_printf("LOADAPLET - UPDATED CPU %d MEM %d", current_cpu_level, current_mem_level));
+
+ //Update and blit only if data changed!
+ if ((current_mem_level != priv->last_mem_level) || (current_cpu_level != priv->last_cpu_level)) {
+ la_blit_memory_bars (current_mem_level, priv);
+ la_blit_cpu_bars (current_cpu_level, priv);
+ if (current_cpu_level == LA_CPU_MAX)
+ priv->red = FALSE;
+ hd_status_plugin_item_set_status_area_icon (HD_STATUS_PLUGIN_ITEM(data), priv->pixbuf);
+ priv->last_mem_level = current_mem_level;
+ priv->last_cpu_level = current_cpu_level;
+ } else if (current_cpu_level == LA_CPU_MAX) {
+ //Pulsate max CPU load icon also when CPU load stays at max
+ la_blit_cpu_bars (current_cpu_level, priv);
+ hd_status_plugin_item_set_status_area_icon (HD_STATUS_PLUGIN_ITEM(data), priv->pixbuf);
+ }
+
+ return TRUE;
+}
+
+/*
+ * Get callback when display state changes
+ */
+static void
+load_applet_status_area_item_display_cb(osso_display_state_t state, gpointer user_data)
+{
+ LoadAppletStatusAreaItem *item = LOAD_APPLET_STATUS_AREA_ITEM(user_data);
+
+ g_return_if_fail (item != NULL && item->priv != NULL);
+
+ if (state == OSSO_DISPLAY_ON)
+ {
+ //Restart the updates, do one right away
+ if (item->priv->timeout_id == -1)
+ {
+ //g_debug("LOADAPPLET - restarting periodic updates");
+ item->priv->timeout_id = gtk_timeout_add(1000, la_check_load, item);
+ }
+ } else {
+ //Suspend the updates - screen is off
+ //g_debug("LOADAPPLET - Turning updates off");
+ if (g_source_remove(item->priv->timeout_id) != TRUE)
+ {
+ //g_error("LOADAPPLET - couldn't stop the updates!the timer still running ...");
+ } else {
+ item->priv->timeout_id = -1;
+ }
+ }
+}
+
+
+/*****************************************************************************
+ *
+ * Boilerplate code area - do not enter
+ *
+ *****************************************************************************/
+
+static void
+load_applet_status_area_item_set_area_icon (LoadAppletStatusAreaItem *item)
+{
+ item->priv = LOAD_APPLET_STATUS_AREA_ITEM_GET_PRIVATE (item);
+
+ hd_status_plugin_item_set_status_area_icon (HD_STATUS_PLUGIN_ITEM(item), item->priv->pixbuf);
+}
+
+
+static void
+load_applet_status_area_item_class_finalize (LoadAppletStatusAreaItemClass *klass)
+{
+}
+
+
+
+static void
+load_applet_status_area_item_finalize (GObject *object)
+{
+ LoadAppletStatusAreaItemPrivate *priv = LOAD_APPLET_STATUS_AREA_ITEM(object)->priv;
+ // Release and clean our stuff
+ G_OBJECT_CLASS (load_applet_status_area_item_parent_class)->finalize (object);
+ if (priv->osso)
+ {
+ osso_deinitialize(priv->osso);
+ priv->osso = NULL;
+ }
+
+}
+
+
+
+static void
+load_applet_status_area_item_class_init (LoadAppletStatusAreaItemClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ object_class->finalize = load_applet_status_area_item_finalize;
+
+ g_type_class_add_private (klass, sizeof (LoadAppletStatusAreaItemPrivate));
+
+}
+
+static void
+load_applet_status_area_item_init (LoadAppletStatusAreaItem *item)
+{
+ item->priv = LOAD_APPLET_STATUS_AREA_ITEM_GET_PRIVATE (item);
+
+ item->priv->last_mem_level = -1;
+ item->priv->last_cpu_level = -1;
+ item->priv->timeout_id = -1;
+ item->priv->red = FALSE;
+ item->priv->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, LA_ICON_WIDTH, LA_ICON_HEIGHT);
+ gdk_pixbuf_fill(item->priv->pixbuf, 0x00000000);
+ item->priv->pixbuf_on = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, LA_BOX_WIDTH, LA_BOX_HEIGHT);
+ gdk_pixbuf_fill(item->priv->pixbuf_on, 0xffffffff);
+ item->priv->pixbuf_red = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, LA_BOX_WIDTH, LA_BOX_HEIGHT);
+ gdk_pixbuf_fill(item->priv->pixbuf_red, 0xff0000ff);
+ item->priv->pixbuf_off = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, LA_BOX_WIDTH, LA_BOX_HEIGHT);
+ gdk_pixbuf_fill(item->priv->pixbuf_off, 0x777777ff);
+ load_applet_status_area_item_set_area_icon(item);
+
+ item->priv->osso = osso_initialize ("cpumem_applet_status_area_item", "Maemo5", TRUE, NULL);
+ item->priv->timeout_id = gtk_timeout_add(1000, la_check_load, item);
+ osso_hw_set_display_event_cb (item->priv->osso, load_applet_status_area_item_display_cb, item);
+}
+