Refactored merged rotation code

commands.c

@@ -397,21 +397,14 @@ bool i_fit_to_img(arg_t a)
 
 bool i_rotate(arg_t a)
 {
-	rotate_t rot = (rotate_t) a;
+	degree_t degree = (degree_t) a;
 
 	if (mode == MODE_IMAGE) {
-		if (rot == ROTATE_90) {
-			img_rotate(&img, 1);
-			return true;
-		} else if (rot == ROTATE_270) {
-			img_rotate(&img, 3);
-			return true;
-		} else if (rot == ROTATE_180) {
-			img_rotate(&img, 2);
-			return true;
-		}
+		img_rotate(&img, degree);
+		return true;
+	}	else {
+		return false;
 	}
-	return false;
 }
 
 bool i_flip(arg_t a)

config.def.h

@@ -114,9 +114,9 @@ static const keymap_t keys[] = {
 	{ false,  XK_E,             i_fit_to_win,         (arg_t) SCALE_HEIGHT },
 	{ false,  XK_W,             i_fit_to_img,         (arg_t) None },
 
-	{ false,  XK_less,          i_rotate,             (arg_t) ROTATE_270 },
-	{ false,  XK_greater,       i_rotate,             (arg_t) ROTATE_90 },
-	{ false,  XK_question,      i_rotate,             (arg_t) ROTATE_180 },
+	{ false,  XK_less,          i_rotate,             (arg_t) DEGREE_270 },
+	{ false,  XK_greater,       i_rotate,             (arg_t) DEGREE_90 },
+	{ false,  XK_question,      i_rotate,             (arg_t) DEGREE_180 },
 
 	{ false,  XK_backslash,     i_flip,               (arg_t) FLIP_HORIZONTAL },
 	{ false,  XK_bar,           i_flip,               (arg_t) FLIP_VERTICAL },

image.c

@@ -650,25 +650,22 @@ bool img_pan_edge(img_t *img, direction_t dir)
 	}
 }
 
-void img_rotate(img_t *img, int d)
+void img_rotate(img_t *img, degree_t d)
 {
-	win_t *win;
 	int ox, oy, tmp;
 
 	if (img == NULL || img->im == NULL || img->win == NULL)
 		return;
 
-	win = img->win;
-	ox = d == 1 ? img->x : win->w - img->x - img->w * img->zoom;
-	oy = d == 3 ? img->y : win->h - img->y - img->h * img->zoom;
-
 	imlib_context_set_image(img->im);
-	/* rotates by `90 * d` degrees in the clockwise direction */
 	imlib_image_orientate(d);
 
-	if (d == 1 || d == 3) {
-		img->x = oy + (win->w - win->h) / 2;
-		img->y = ox + (win->h - win->w) / 2;
+	if (d == DEGREE_90 || d == DEGREE_270) {
+		ox = d == DEGREE_90  ? img->x : img->win->w - img->x - img->w * img->zoom;
+		oy = d == DEGREE_270 ? img->y : img->win->h - img->y - img->h * img->zoom;
+
+		img->x = oy + (img->win->w - img->win->h) / 2;
+		img->y = ox + (img->win->h - img->win->w) / 2;
 
 		tmp = img->w;
 		img->w = img->h;

image.h

@@ -76,7 +76,7 @@ bool img_move(img_t*, float, float);
 bool img_pan(img_t*, direction_t, int);
 bool img_pan_edge(img_t*, direction_t);
 
-void img_rotate(img_t*, int);
+void img_rotate(img_t*, degree_t);
 void img_flip(img_t*, flipdir_t);
 
 void img_toggle_antialias(img_t*);

types.h

@@ -39,10 +39,10 @@ typedef enum {
 } direction_t;
 
 typedef enum {
-	ROTATE_90,
-	ROTATE_270,
-	ROTATE_180
-} rotate_t;
+	DEGREE_90  = 1,
+	DEGREE_180 = 2,
+	DEGREE_270 = 3
+} degree_t;
 
 typedef enum {
 	FLIP_HORIZONTAL,