/* Periodic timer callback.
* Also used during initialization and configuration change to do a redraw. */
static gboolean dclock_update_display(DClockPlugin * dc)
{
/* Determine the current time. */
time_t now;
time(&now);
struct tm * current_time = localtime(&now);
/* Determine the content of the clock label and tooltip. */
char clock_value[64];
char tooltip_value[64];
clock_value[0] = '\0';
if (dc->clock_format != NULL)
strftime(clock_value, sizeof(clock_value), dc->clock_format, current_time);
tooltip_value[0] = '\0';
if (dc->tooltip_format != NULL)
strftime(tooltip_value, sizeof(tooltip_value), dc->tooltip_format, current_time);
/* When we write the clock value, it causes the panel to do a full relayout.
* Since this function may be called too often while the timing experiment is underway,
* we take the trouble to check if the string actually changed first. */
if (( ! dc->icon_only)
&& ((dc->prev_clock_value == NULL) || (strcmp(dc->prev_clock_value, clock_value) != 0)))
{
/* Convert "\n" escapes in the user's format string to newline characters. */
char * newlines_converted = NULL;
if (strstr(clock_value, "\\n") != NULL)
{
newlines_converted = g_strdup(clock_value); /* Just to get enough space for the converted result */
char * p;
char * q;
for (p = clock_value, q = newlines_converted; *p != '\0'; p += 1)
{
if ((p[0] == '\\') && (p[1] == 'n'))
{
*q++ = '\n';
p += 1;
}
else
*q++ = *p;
}
*q = '\0';
}
gchar * utf8 = g_locale_to_utf8(((newlines_converted != NULL) ? newlines_converted : clock_value), -1, NULL, NULL, NULL);
if (utf8 != NULL)
{
panel_draw_label_text(dc->plugin->panel, dc->clock_label, utf8, dc->bold, TRUE);
g_free(utf8);
}
g_free(newlines_converted);
}
/* Determine the content of the tooltip. */
gchar * utf8 = g_locale_to_utf8(tooltip_value, -1, NULL, NULL, NULL);
if (utf8 != NULL)
{
gtk_widget_set_tooltip_text(dc->plugin->pwid, utf8);
g_free(utf8);
}
/* Conduct an experiment to see how often the value changes.
* Use this to decide whether we update the value every second or every minute.
* We need to account for the possibility that the experiment is being run when we cross a minute boundary. */
if (dc->expiration_interval < ONE_SECOND_INTERVAL)
{
if (dc->prev_clock_value == NULL)
{
/* Initiate the experiment. */
dc->prev_clock_value = g_strdup(clock_value);
dc->prev_tooltip_value = g_strdup(tooltip_value);
}
else
{
if (((dc->icon_only) || (strcmp(dc->prev_clock_value, clock_value) == 0))
&& (strcmp(dc->prev_tooltip_value, tooltip_value) == 0))
{
dc->experiment_count += 1;
if (dc->experiment_count > 3)
{
/* No change within 3 seconds. Assume change no more often than once per minute. */
dc->expiration_interval = ONE_MINUTE_INTERVAL;
g_free(dc->prev_clock_value);
g_free(dc->prev_tooltip_value);
dc->prev_clock_value = NULL;
dc->prev_tooltip_value = NULL;
}
}
else if (dc->expiration_interval == AWAITING_FIRST_CHANGE)
{
/* We have a change at the beginning of the experiment, but we do not know when the next change might occur.
* Continue the experiment for 3 more seconds. */
dc->expiration_interval = AWAITING_SECOND_CHANGE;
dc->experiment_count = 0;
g_free(dc->prev_clock_value);
g_free(dc->prev_tooltip_value);
dc->prev_clock_value = g_strdup(clock_value);
dc->prev_tooltip_value = g_strdup(tooltip_value);
}
else
{
/* We have a second change. End the experiment. */
dc->expiration_interval = ((dc->experiment_count > 3) ? ONE_MINUTE_INTERVAL : ONE_SECOND_INTERVAL);
g_free(dc->prev_clock_value);
g_free(dc->prev_tooltip_value);
dc->prev_clock_value = NULL;
dc->prev_tooltip_value = NULL;
}
}
}
/* Reset the timer and return. */
dclock_timer_set(dc);
return FALSE;
}
/* Periodic timer callback.
* Also used during initialization and configuration change to do a redraw. */
static gboolean dclock_update_display(DClockPlugin * dc)
{
/* Determine the current time. */
struct tm * current_time = _get_time_to_display(dc);
/* Determine the content of the clock label and tooltip. */
char clock_value[256];
char tooltip_value[256];
clock_value[0] = '\0';
if (dc->clock_format != NULL)
strftime(clock_value, sizeof(clock_value), dc->clock_format, current_time);
tooltip_value[0] = '\0';
if (dc->tooltip_format != NULL)
strftime(tooltip_value, sizeof(tooltip_value), dc->tooltip_format, current_time);
/* When we write the clock value, it causes the panel to do a full relayout.
* Since this function may be called too often while the timing experiment is underway,
* we take the trouble to check if the string actually changed first. */
if ((dc->prev_clock_value == NULL) || (strcmp(dc->prev_clock_value, clock_value) != 0))
{
/* Convert "\n" escapes in the user's format string to newline characters. */
char * newlines_converted = NULL;
if (strstr(clock_value, "\\n") != NULL)
{
newlines_converted = g_strdup(clock_value); /* Just to get enough space for the converted result */
char * p;
char * q;
for (p = clock_value, q = newlines_converted; *p != '\0'; p += 1)
{
if ((p[0] == '\\') && (p[1] == 'n'))
{
*q++ = '\n';
p += 1;
}
else
*q++ = *p;
}
*q = '\0';
}
gchar ** segments = g_strsplit(
(newlines_converted != NULL) ? newlines_converted : clock_value,
"\\t", MAX_LABELS);
int i;
for (i = 0; i < MAX_LABELS; i++)
{
if (!segments || !segments[i])
break;
if (!dc->clock_labels[i])
{
dc->clock_labels[i] = gtk_label_new(NULL);
gtk_misc_set_alignment(GTK_MISC(dc->clock_labels[i]), 0.5, 0.5);
gtk_container_add(GTK_CONTAINER(dc->label_box), dc->clock_labels[i]);
gtk_label_set_justify(GTK_LABEL(dc->clock_labels[i]), GTK_JUSTIFY_CENTER);
}
panel_draw_label_text_with_font(
plugin_panel(dc->plugin), dc->clock_labels[i],
segments[i],
STYLE_CUSTOM_COLOR | STYLE_MARKUP, dc->font);
gtk_widget_show(dc->clock_labels[i]);
}
for (/*nothing*/; i < MAX_LABELS; i++)
{
if (!dc->clock_labels[i])
break;
gtk_widget_hide(dc->clock_labels[i]);
}
g_strfreev(segments);
g_free(newlines_converted);
}
/* Determine the content of the tooltip. */
gtk_widget_set_tooltip_text(plugin_widget(dc->plugin), tooltip_value);
/* Conduct an experiment to see how often the value changes.
* Use this to decide whether we update the value every second or every minute.
* We need to account for the possibility that the experiment is being run when we cross a minute boundary. */
if (dc->expiration_interval < ONE_SECOND_INTERVAL)
{
if (dc->prev_clock_value == NULL)
{
/* Initiate the experiment. */
dc->prev_clock_value = g_strdup(clock_value);
dc->prev_tooltip_value = g_strdup(tooltip_value);
}
else
{
if ((strcmp(dc->prev_clock_value, clock_value) == 0)
&& (strcmp(dc->prev_tooltip_value, tooltip_value) == 0))
{
dc->experiment_count += 1;
if (dc->experiment_count > 3)
{
/* No change within 3 seconds. Assume change no more often than once per minute. */
dc->expiration_interval = ONE_MINUTE_INTERVAL;
g_free(dc->prev_clock_value);
g_free(dc->prev_tooltip_value);
dc->prev_clock_value = NULL;
dc->prev_tooltip_value = NULL;
}
}
else if (dc->expiration_interval == AWAITING_FIRST_CHANGE)
{
/* We have a change at the beginning of the experiment, but we do not know when the next change might occur.
* Continue the experiment for 3 more seconds. */
dc->expiration_interval = AWAITING_SECOND_CHANGE;
dc->experiment_count = 0;
g_free(dc->prev_clock_value);
g_free(dc->prev_tooltip_value);
dc->prev_clock_value = g_strdup(clock_value);
dc->prev_tooltip_value = g_strdup(tooltip_value);
}
else
{
/* We have a second change. End the experiment. */
dc->expiration_interval = ((dc->experiment_count > 3) ? ONE_MINUTE_INTERVAL : ONE_SECOND_INTERVAL);
g_free(dc->prev_clock_value);
g_free(dc->prev_tooltip_value);
dc->prev_clock_value = NULL;
dc->prev_tooltip_value = NULL;
}
}
}
/* Reset the timer and return. */
dclock_timer_set(dc);
return FALSE;
}
