1 files changed, 43 insertions, 16 deletions

diff --git a/x.c b/x.c
index 696ade9..2580d2a 100644
--- a/x.c
+++ b/x.c
@@ -182,6 +182,7 @@ static void xsetenv(void);
 static void xseturgency(int);
 static int evcol(XEvent *);
 static int evrow(XEvent *);
+static float clamp(float, float, float);
 
 static void expose(XEvent *);
 static void visibility(XEvent *);
@@ -272,6 +273,8 @@ static char *opt_line  = NULL;
 static char *opt_name  = NULL;
 static char *opt_title = NULL;
 
+static int focused = 0;
+
 static int oldbutton = 3; /* button event on startup: 3 = release */
 
 void
@@ -317,10 +320,8 @@ changealpha(const Arg *arg)
 {
     if((alpha > 0 && arg->f < 0) || (alpha < 1 && arg->f > 0))
         alpha += arg->f;
-    if(alpha < 0)
-        alpha = 0;
-    if(alpha > 1)
-        alpha = 1;
+    alpha = clamp(alpha, 0.0, 1.0);
+    alphaUnfocus = clamp(alpha-alphaOffset, 0.0, 1.0);
 
     xloadcols();
     redraw();
@@ -379,6 +380,15 @@ evrow(XEvent *e)
 	return y / win.ch;
 }
 
+float
+clamp(float value, float lower, float upper) {
+    if(value < lower)
+        return lower;
+    if(value > upper)
+        return upper;
+    return value;
+}
+
 void
 mousesel(XEvent *e, int done)
 {
@@ -808,21 +818,28 @@ xloadcolor(int i, const char *name, Color *ncolor)
 }
 
 void
+xloadalpha(void)
+{
+	float const usedAlpha = focused ? alpha : alphaUnfocus;
+	if (opt_alpha) alpha = strtof(opt_alpha, NULL);
+	dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * usedAlpha);
+	dc.col[defaultbg].pixel &= 0x00FFFFFF;
+	dc.col[defaultbg].pixel |= (unsigned char)(0xff * usedAlpha) << 24;
+}
+
+void
 xloadcols(void)
 {
 	int i;
 	static int loaded;
 	Color *cp;
 
-	if (loaded) {
-		for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
-			XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
-	} else {
-		dc.collen = MAX(LEN(colorname), 256);
+	if (!loaded) {
+		dc.collen = 1 + (defaultbg = MAX(LEN(colorname), 256));
 		dc.col = xmalloc(dc.collen * sizeof(Color));
 	}
 
-	for (i = 0; i < dc.collen; i++)
+	for (i = 0; i+1 < dc.collen; i++)
 		if (!xloadcolor(i, NULL, &dc.col[i])) {
 			if (colorname[i])
 				die("could not allocate color '%s'\n", colorname[i]);
@@ -830,12 +847,10 @@ xloadcols(void)
 				die("could not allocate color %d\n", i);
 		}
 
-	/* set alpha value of bg color */
-	if (opt_alpha)
-		alpha = strtof(opt_alpha, NULL);
-	dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * alpha);
-	dc.col[defaultbg].pixel &= 0x00FFFFFF;
-	dc.col[defaultbg].pixel |= (unsigned char)(0xff * alpha) << 24;
+	if (dc.collen) // cannot die, as the color is already loaded.
+		xloadcolor(background, NULL, &dc.col[defaultbg]);
+
+	xloadalpha();
 	loaded = 1;
 }
 
@@ -1910,12 +1925,22 @@ focus(XEvent *ev)
 		xseturgency(0);
 		if (IS_SET(MODE_FOCUS))
 			ttywrite("\033[I", 3, 0);
+		if (!focused) {
+			focused = 1;
+			xloadcols();
+			tfulldirt();
+		}
 	} else {
 		if (xw.ime.xic)
 			XUnsetICFocus(xw.ime.xic);
 		win.mode &= ~MODE_FOCUSED;
 		if (IS_SET(MODE_FOCUS))
 			ttywrite("\033[O", 3, 0);
+		if (focused) {
+			focused = 0;
+			xloadcols();
+			tfulldirt();
+		}
 	}
 }
 
@@ -2280,6 +2305,8 @@ run:
 	config_init();
 	cols = MAX(cols, 1);
 	rows = MAX(rows, 1);
+	defaultbg = MAX(LEN(colorname), 256);
+	alphaUnfocus = alpha-alphaOffset;
 	tnew(cols, rows);
 	xinit(cols, rows);
 	xsetenv();