*add* clock supports timezones

*add* first preparations for real transparency (tooltip works already, but panel does not. Therefore it is disabled in the source code)


git-svn-id: http://tint2.googlecode.com/svn/trunk@304 121b4492-b84c-0410-8b4c-0d4edfb3f3cc

src/clock/clock.c

@@ -24,6 +24,7 @@
 #include <pango/pangocairo.h>
 #include <unistd.h>
 #include <signal.h>
+#include <stdlib.h>
 
 #include "window.h"
 #include "server.h"
@@ -35,8 +36,11 @@
 
 
 char *time1_format=0;
+char *time1_timezone=0;
 char *time2_format=0;
+char *time2_timezone=0;
 char *time_tooltip_format=0;
+char *time_tooltip_timezone=0;
 char *clock_lclick_command=0;
 char *clock_rclick_command=0;
 struct timeval time_clock;
@@ -60,10 +64,21 @@ void update_clocks()
 	panel_refresh = 1;
 }
 
+struct tm* clock_gettime_for_tz(const char* timezone) {
+	if (timezone) {
+		const char* old_tz = getenv("TZ");
+		setenv("TZ", timezone, 1);
+		struct tm* result = localtime(&time_clock.tv_sec);
+		if (old_tz) setenv("TZ", old_tz, 1);
+		else unsetenv("TZ");
+		return result;
+	}
+	else return localtime(&time_clock.tv_sec);
+}
 
 const char* clock_get_tooltip(void* obj)
 {
-	strftime(buf_tooltip, sizeof(buf_tooltip), time_tooltip_format, localtime(&time_clock.tv_sec));
+	strftime(buf_tooltip, sizeof(buf_tooltip), time_tooltip_format, clock_gettime_for_tz(time_tooltip_timezone));
 	return buf_tooltip;
 }
 
@@ -93,10 +108,10 @@ void init_clock_panel(void *p)
 	clock->area.redraw = 1;
 	clock->area.on_screen = 1;
 
-	strftime(buf_time, sizeof(buf_time), time1_format, localtime(&time_clock.tv_sec));
+	strftime(buf_time, sizeof(buf_time), time1_format, clock_gettime_for_tz(time1_timezone));
 	get_text_size(time1_font_desc, &time_height_ink, &time_height, panel->area.height, buf_time, strlen(buf_time));
 	if (time2_format) {
-		strftime(buf_date, sizeof(buf_date), time2_format, localtime(&time_clock.tv_sec));
+		strftime(buf_date, sizeof(buf_date), time2_format, clock_gettime_for_tz(time2_timezone));
 		get_text_size(time2_font_desc, &date_height_ink, &date_height, panel->area.height, buf_date, strlen(buf_date));
 	}
 
@@ -115,7 +130,7 @@ void init_clock_panel(void *p)
 
 	clock->time1_posy = (clock->area.height - time_height) / 2;
 	if (time2_format) {
-		strftime(buf_date, sizeof(buf_date), time2_format, localtime(&time_clock.tv_sec));
+		strftime(buf_date, sizeof(buf_date), time2_format, clock_gettime_for_tz(time2_timezone));
 		get_text_size(time2_font_desc, &date_height_ink, &date_height, panel->area.height, buf_date, strlen(buf_date));
 
 		clock->time1_posy -= ((date_height_ink + 2) / 2);
@@ -124,7 +139,7 @@ void init_clock_panel(void *p)
 
 	if (time_tooltip_format) {
 		clock->area._get_tooltip_text = clock_get_tooltip;
-		strftime(buf_tooltip, sizeof(buf_tooltip), time_tooltip_format, localtime(&time_clock.tv_sec));
+		strftime(buf_tooltip, sizeof(buf_tooltip), time_tooltip_format, clock_gettime_for_tz(time_tooltip_timezone));
 	}
 }
 
@@ -136,18 +151,17 @@ void cleanup_clock()
 		pango_font_description_free(time1_font_desc);
 	if (time2_font_desc)
 		pango_font_description_free(time2_font_desc);
-	if (time1_format)
-		g_free(time1_format);
-	if (time2_format)
-		g_free(time2_format);
-	if (time_tooltip_format)
-		g_free(time_tooltip_format);
-	if (clock_lclick_command)
-		g_free(clock_lclick_command);
-	if (clock_rclick_command)
-		g_free(clock_rclick_command);
+	g_free(time1_format);
+	g_free(time2_format);
+	g_free(time_tooltip_format);
+	g_free(time1_timezone);
+	g_free(time2_timezone);
+	g_free(time_tooltip_timezone);
+	g_free(clock_lclick_command);
+	g_free(clock_rclick_command);
 	time1_font_desc = time2_font_desc = 0;
-	time1_format = time2_format = 0;
+	time1_format = time2_format = time_tooltip_format = 0;
+	time1_timezone = time2_timezone = time_tooltip_timezone = 0;
 	clock_lclick_command = clock_rclick_command = 0;
 }
 
@@ -194,9 +208,9 @@ void resize_clock (void *obj)
 
 	clock->area.redraw = 1;
 	time_width = date_width = 0;
-	strftime(buf_time, sizeof(buf_time), time1_format, localtime(&time_clock.tv_sec));
+	strftime(buf_time, sizeof(buf_time), time1_format, clock_gettime_for_tz(time1_timezone));
 	if (time2_format)
-		strftime(buf_date, sizeof(buf_date), time2_format, localtime(&time_clock.tv_sec));
+		strftime(buf_date, sizeof(buf_date), time2_format, clock_gettime_for_tz(time2_timezone));
 
 	// vertical panel doen't adjust width
 	if (!panel_horizontal) return;

src/clock/clock.h

@@ -25,8 +25,11 @@ typedef struct Clock {
 
 
 extern char *time1_format;
+extern char *time1_timezone;
 extern char *time2_format;
+extern char *time2_timezone;
 extern char *time_tooltip_format;
+extern char *time_tooltip_timezone;
 extern PangoFontDescription *time1_font_desc;
 extern PangoFontDescription *time2_font_desc;
 extern char *clock_lclick_command;