Revert "remove opacity_unfocused"

awesomerc.1.txt

@@ -338,6 +338,7 @@ screen <integer> [MULTI]
         font = <font>
         new_become_master = <boolean>
         new_get_focus = <boolean>
+        opacity_unfocused = <integer>
         resize_hints = <boolean>
         sloppy_focus = <boolean>
         sloppy_focus_raise = <boolean>

client.c

@@ -147,6 +147,8 @@ client_updatetitle(Client *c)
 static void
 client_unfocus(Client *c)
 {
+    if(globalconf.screens[c->screen].opacity_unfocused != -1)
+        window_settrans(c->win, globalconf.screens[c->screen].opacity_unfocused);
     XSetWindowBorder(globalconf.display, c->win,
                      globalconf.screens[c->screen].colors_normal[ColBorder].pixel);
     widget_invalidate_cache(c->screen, WIDGET_CACHE_CLIENTS);
@@ -191,6 +193,8 @@ client_focus(Client *c, int screen, Bool from_mouse)
     {
         /* save sel in focus history */
         focus_add_client(c);
+        if(globalconf.screens[c->screen].opacity_unfocused != -1)
+            window_settrans(c->win, globalconf.screens[screen].opacity_unfocused);
         XSetWindowBorder(globalconf.display, c->win,
                          globalconf.screens[screen].colors_selected[ColBorder].pixel);
         XSetInputFocus(globalconf.display, c->win, RevertToPointerRoot, CurrentTime);

common/configopts.c

@@ -36,6 +36,7 @@ cfg_opt_t general_opts[] =
     CFG_BOOL((char *) "new_become_master", cfg_true, CFGF_NONE),
     CFG_BOOL((char *) "new_get_focus", cfg_true, CFGF_NONE),
     CFG_STR((char *) "font", (char *) "vera-10", CFGF_NONE),
+    CFG_INT((char *) "opacity_unfocused", -1, CFGF_NONE),
     CFG_END()
 };
 cfg_opt_t colors_opts[] =

config.c

@@ -317,6 +317,7 @@ config_parse_screen(cfg_t *cfg, int screen)
     virtscreen->sloppy_focus_raise = cfg_getbool(cfg_general, "sloppy_focus_raise");
     virtscreen->new_become_master = cfg_getbool(cfg_general, "new_become_master");
     virtscreen->new_get_focus = cfg_getbool(cfg_general, "new_get_focus");
+    virtscreen->opacity_unfocused = cfg_getint(cfg_general, "opacity_unfocused");
     virtscreen->font = XftFontOpenName(globalconf.display,
                                        phys_screen,
                                        cfg_getstr(cfg_general, "font"));

structs.h

@@ -270,6 +270,8 @@ typedef struct
     XColor colors_selected[ColLast];
     /** Urgency colors */
     XColor colors_urgent[ColLast];
+    /** Transparency of unfocused clients */
+    int opacity_unfocused;
     /** Tag list */
     Tag *tags;
     /** Layout list */