Added own bool type

13 files changed, 454 insertions, 452 deletions

diff --git a/commands.c b/commands.c
index 4c9553e..18080cd 100644
--- a/commands.c
+++ b/commands.c
@@ -26,17 +26,16 @@
 #include "commands.h"
 #include "image.h"
 #include "thumbs.h"
-#include "types.h"
 #include "util.h"
 
 void cleanup();
-void remove_file(int, unsigned char);
+void remove_file(int, bool);
 void load_image(int);
 void redraw();
 void reset_cursor();
 void animate();
 void slideshow();
-void set_timeout(timeout_f, int, int);
+void set_timeout(timeout_f, int, bool);
 void reset_timeout(timeout_f);
 
 extern appmode_t mode;
@@ -47,73 +46,73 @@ extern win_t win;
 extern fileinfo_t *files;
 extern int filecnt, fileidx;
 
-int it_quit(arg_t a) {
+bool it_quit(arg_t a) {
 	cleanup();
 	exit(0);
 }
 
-int it_switch_mode(arg_t a) {
+bool it_switch_mode(arg_t a) {
 	if (mode == MODE_IMAGE) {
 		if (!tns.thumbs)
 			tns_init(&tns, filecnt);
-		img_close(&img, 0);
+		img_close(&img, false);
 		reset_timeout(reset_cursor);
 		if (img.slideshow) {
-			img.slideshow = 0;
+			img.slideshow = false;
 			reset_timeout(slideshow);
 		}
 		tns.sel = fileidx;
-		tns.dirty = 1;
+		tns.dirty = true;
 		mode = MODE_THUMB;
 	} else {
 		load_image(tns.sel);
 		mode = MODE_IMAGE;
 	}
-	return 1;
+	return true;
 }
 
-int it_toggle_fullscreen(arg_t a) {
+bool it_toggle_fullscreen(arg_t a) {
 	win_toggle_fullscreen(&win);
-	set_timeout(redraw, TO_REDRAW_RESIZE, 0);
+	set_timeout(redraw, TO_REDRAW_RESIZE, false);
 	if (mode == MODE_IMAGE)
-		img.checkpan = 1;
+		img.checkpan = true;
 	else
-		tns.dirty = 1;
-	return 0;
+		tns.dirty = true;
+	return false;
 }
 
-int it_reload_image(arg_t a) {
+bool it_reload_image(arg_t a) {
 	if (mode == MODE_IMAGE) {
 		load_image(fileidx);
 	} else {
 		win_set_cursor(&win, CURSOR_WATCH);
-		if (!tns_load(&tns, tns.sel, &files[tns.sel], True, False)) {
-			remove_file(tns.sel, 0);
-			tns.dirty = 1;
+		if (!tns_load(&tns, tns.sel, &files[tns.sel], true, false)) {
+			remove_file(tns.sel, false);
+			tns.dirty = true;
 			if (tns.sel >= tns.cnt)
 				tns.sel = tns.cnt - 1;
 		}
 	}
-	return 1;
+	return true;
 }
 
-int it_remove_image(arg_t a) {
+bool it_remove_image(arg_t a) {
 	if (mode == MODE_IMAGE) {
-		remove_file(fileidx, 1);
+		remove_file(fileidx, true);
 		load_image(fileidx >= filecnt ? filecnt - 1 : fileidx);
-		return 1;
+		return true;
 	} else if (tns.sel < tns.cnt) {
-		remove_file(tns.sel, 1);
-		tns.dirty = 1;
+		remove_file(tns.sel, true);
+		tns.dirty = true;
 		if (tns.sel >= tns.cnt)
 			tns.sel = tns.cnt - 1;
-		return 1;
+		return true;
 	} else {
-		return 0;
+		return false;
 	}
 }
 
-int i_navigate(arg_t a) {
+bool i_navigate(arg_t a) {
 	long n = (long) a;
 
 	if (mode == MODE_IMAGE) {
@@ -125,86 +124,83 @@ int i_navigate(arg_t a) {
 
 		if (n != fileidx) {
 			load_image(n);
-			return 1;
+			return true;
 		}
 	}
-	return 0;
+	return false;
 }
 
-int it_first(arg_t a) {
+bool it_first(arg_t a) {
 	if (mode == MODE_IMAGE && fileidx != 0) {
 		load_image(0);
-		return 1;
+		return true;
 	} else if (mode == MODE_THUMB && tns.sel != 0) {
 		tns.sel = 0;
-		tns.dirty = 1;
-		return 1;
+		tns.dirty = true;
+		return true;
 	} else {
-		return 0;
+		return false;
 	}
 }
 
-int it_last(arg_t a) {
+bool it_last(arg_t a) {
 	if (mode == MODE_IMAGE && fileidx != filecnt - 1) {
 		load_image(filecnt - 1);
-		return 1;
+		return true;
 	} else if (mode == MODE_THUMB && tns.sel != tns.cnt - 1) {
 		tns.sel = tns.cnt - 1;
-		tns.dirty = 1;
-		return 1;
+		tns.dirty = true;
+		return true;
 	} else {
-		return 0;
+		return false;
 	}
 }
 
-int i_navigate_frame(arg_t a) {
+bool i_navigate_frame(arg_t a) {
 	if (mode == MODE_IMAGE && !img.multi.animate)
 		return img_frame_navigate(&img, (long) a);
 	else
-		return 0;
+		return false;
 }
 
-int i_toggle_animation(arg_t a) {
-	int delay;
-
+bool i_toggle_animation(arg_t a) {
 	if (mode != MODE_IMAGE)
-		return 0;
+		return false;
 
 	if (img.multi.animate) {
 		reset_timeout(animate);
-		img.multi.animate = 0;
-	} else {
-		delay = img_frame_animate(&img, 1);
-		set_timeout(animate, delay, 1);
+		img.multi.animate = false;
+	} else if (img_frame_animate(&img, true)) {
+		set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
 	}
-	return 1;
+	return true;
 }
 
-int it_move(arg_t a) {
+bool it_move(arg_t a) {
 	direction_t dir = (direction_t) a;
 
 	if (mode == MODE_IMAGE)
-		return img_pan(&img, &win, dir, 0);
+		return img_pan(&img, &win, dir, false);
 	else
 		return tns_move_selection(&tns, &win, dir);
 }
 
-int i_pan_screen(arg_t a) {
+bool i_pan_screen(arg_t a) {
 	direction_t dir = (direction_t) a;
 
 	if (mode == MODE_IMAGE)
-		return img_pan(&img, &win, dir, 1);
+		return img_pan(&img, &win, dir, true);
 	else
-		return 0;
+		return false;
 }
 
-int i_pan_edge(arg_t a) {
+bool i_pan_edge(arg_t a) {
 	direction_t dir = (direction_t) a;
 
 	if (mode == MODE_IMAGE)
 		return img_pan_edge(&img, &win, dir);
 	else
-		return 0;
+		return false;
 }
 
 /* Xlib helper function for i_drag() */
@@ -212,17 +208,17 @@ Bool is_motionnotify(Display *d, XEvent *e, XPointer a) {
 	return e != NULL && e->type == MotionNotify;
 }
 
-int i_drag(arg_t a) {
+bool i_drag(arg_t a) {
 	int dx = 0, dy = 0, i, ox, oy, x, y;
 	unsigned int ui;
-	Bool dragging = True, next = False;
+	bool dragging = true, next = false;
 	XEvent e;
 	Window w;
 
 	if (mode != MODE_IMAGE)
-		return 0;
+		return false;
 	if (!XQueryPointer(win.env.dpy, win.xwin, &w, &w, &i, &i, &ox, &oy, &ui))
-		return 0;
+		return false;
 	
 	win_set_cursor(&win, CURSOR_HAND);
 
@@ -233,7 +229,7 @@ int i_drag(arg_t a) {
 		switch (e.type) {
 			case ButtonPress:
 			case ButtonRelease:
-				dragging = False;
+				dragging = false;
 				break;
 			case MotionNotify:
 				x = e.xmotion.x;
@@ -256,17 +252,17 @@ int i_drag(arg_t a) {
 	}
 	
 	win_set_cursor(&win, CURSOR_ARROW);
-	set_timeout(reset_cursor, TO_CURSOR_HIDE, 1);
+	set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
 	reset_timeout(redraw);
 
-	return 0;
+	return false;
 }
 
-int i_zoom(arg_t a) {
+bool i_zoom(arg_t a) {
 	long scale = (long) a;
 
 	if (mode != MODE_IMAGE)
-		return 0;
+		return false;
 
 	if (scale > 0)
 		return img_zoom_in(&img, &win);
@@ -276,21 +272,22 @@ int i_zoom(arg_t a) {
 		return img_zoom(&img, &win, 1.0);
 }
 
-int i_fit_to_win(arg_t a) {
-	int ret;
+bool i_fit_to_win(arg_t a) {
+	bool ret;
 
 	if (mode == MODE_IMAGE) {
 		if ((ret = img_fit_win(&img, &win)))
 			img_center(&img, &win);
 		return ret;
 	} else {
-		return 0;
+		return false;
 	}
 }
 
-int i_fit_to_img(arg_t a) {
-	int ret, x, y;
+bool i_fit_to_img(arg_t a) {
+	int x, y;
 	unsigned int w, h;
+	bool ret;
 
 	if (mode == MODE_IMAGE) {
 		x = MAX(0, win.x + img.x);
@@ -303,90 +300,91 @@ int i_fit_to_img(arg_t a) {
 		}
 		return ret;
 	} else {
-		return 0;
+		return false;
 	}
 }
 
-int i_rotate(arg_t a) {
+bool i_rotate(arg_t a) {
 	direction_t dir = (direction_t) a;
 
 	if (mode == MODE_IMAGE) {
 		if (dir == DIR_LEFT) {
 			img_rotate_left(&img, &win);
-			return 1;
+			return true;
 		} else if (dir == DIR_RIGHT) {
 			img_rotate_right(&img, &win);
-			return 1;
+			return true;
 		}
 	}
-	return 0;
+	return false;
 }
 
-int i_toggle_slideshow(arg_t a) {
+bool i_toggle_slideshow(arg_t a) {
 	if (mode == MODE_IMAGE) {
 		if (img.slideshow) {
-			img.slideshow = 0;
+			img.slideshow = false;
 			reset_timeout(slideshow);
-			return 1;
+			return true;
 		} else if (fileidx + 1 < filecnt) {
-			img.slideshow = 1;
-			set_timeout(slideshow, img.ss_delay, 1);
-			return 1;
+			img.slideshow = true;
+			set_timeout(slideshow, img.ss_delay, true);
+			return true;
 		}
 	}
-	return 0;
+	return false;
 }
 
-int i_adjust_slideshow(arg_t a) {
+bool i_adjust_slideshow(arg_t a) {
 	long d = (long) a;
 	int i, delays[] = { 1, 2, 3, 5, 10, 15, 20, 30, 60, 120, 180, 300, 600 };
 
 	if (mode != MODE_IMAGE || !img.slideshow)
-		return 0;
+		return false;
 
 	if (d < 0) {
 		for (i = ARRLEN(delays) - 2; i >= 0; i--) {
 			if (img.ss_delay > delays[i] * 1000) {
 				img.ss_delay = delays[i] * 1000;
-				return 1;
+				return true;
 			}
 		}
 	} else {
 		for (i = 1; i < ARRLEN(delays); i++) {
 			if (img.ss_delay < delays[i] * 1000) {
 				img.ss_delay = delays[i] * 1000;
-				return 1;
+				return true;
 			}
 		}
 	}
-	return 0;
+	return false;
 }
 
-int i_toggle_antialias(arg_t a) {
+bool i_toggle_antialias(arg_t a) {
 	if (mode == MODE_IMAGE) {
 		img_toggle_antialias(&img);
-		return 1;
+		return true;
 	} else {
-		return 0;
+		return false;
 	}
 }
 
-int it_toggle_alpha(arg_t a) {
-	img.alpha ^= 1;
-	tns.alpha = img.alpha;
-	if (mode == MODE_THUMB)
-		tns.dirty = 1;
-	return 1;
+bool it_toggle_alpha(arg_t a) {
+	img.alpha = tns.alpha = !img.alpha;
+	if (mode == MODE_IMAGE)
+		img.dirty = true;
+	else
+		tns.dirty = true;
+	return true;
 }
 
-int it_open_with(arg_t a) {
+bool it_open_with(arg_t a) {
 	const char *prog = (const char*) a;
 	pid_t pid;
 
 	if (!prog || !*prog)
-		return 0;
+		return false;
 
-	if((pid = fork()) == 0) {
+	if ((pid = fork()) == 0) {
 		execlp(prog, prog,
 		       files[mode == MODE_IMAGE ? fileidx : tns.sel].path, NULL);
 		warn("could not exec: %s", prog);
@@ -395,10 +393,10 @@ int it_open_with(arg_t a) {
 		warn("could not fork. program was: %s", prog);
 	}
 	
-	return 0;
+	return false;
 }
 
-int it_shell_cmd(arg_t a) {
+bool it_shell_cmd(arg_t a) {
 	int n, status;
 	const char *cmdline = (const char*) a;
 	pid_t pid;
@@ -411,7 +409,7 @@ int it_shell_cmd(arg_t a) {
 	if (setenv("SXIV_IMG", files[n].path, 1) < 0) {
 		warn("could not set env.-variable: SXIV_IMG. command line was: %s",
 		     cmdline);
-		return 0;
+		return false;
 	}
 
 	if ((pid = fork()) == 0) {
@@ -420,7 +418,7 @@ int it_shell_cmd(arg_t a) {
 		exit(1);
 	} else if (pid < 0) {
 		warn("could not fork. command line was: %s", cmdline);
-		return 0;
+		return false;
 	}
 
 	win_set_cursor(&win, CURSOR_WATCH);
@@ -431,17 +429,17 @@ int it_shell_cmd(arg_t a) {
 		     WEXITSTATUS(status), cmdline);
 	
 	if (mode == MODE_IMAGE) {
-		img_close(&img, 1);
+		img_close(&img, true);
 		load_image(fileidx);
 	}
-	if (!tns_load(&tns, n, &files[n], True, mode == MODE_IMAGE) &&
+	if (!tns_load(&tns, n, &files[n], true, mode == MODE_IMAGE) &&
 	    mode == MODE_THUMB)
 	{
-		remove_file(tns.sel, 0);
-		tns.dirty = 1;
+		remove_file(tns.sel, false);
+		tns.dirty = true;
 		if (tns.sel >= tns.cnt)
 			tns.sel = tns.cnt - 1;
 	}
 
-	return 1;
+	return true;
 }
diff --git a/commands.h b/commands.h
index e038246..2609754 100644
--- a/commands.h
+++ b/commands.h
@@ -21,47 +21,49 @@
 
 #include <X11/Xlib.h>
 
+#include "types.h"
+
 typedef void* arg_t;
-typedef int (*command_f)(arg_t);
+typedef bool (*command_f)(arg_t);
 
 typedef struct {
-	Bool ctrl;
+	bool ctrl;
 	KeySym ksym;
 	command_f cmd;
 	arg_t arg;
 } keymap_t;
 
 typedef struct {
-	Bool ctrl;
-	Bool shift;
+	bool ctrl;
+	bool shift;
 	unsigned int button;
 	command_f cmd;
 	arg_t arg;
 } button_t;
 
-int it_quit(arg_t);
-int it_switch_mode(arg_t);
-int it_toggle_fullscreen(arg_t);
-int it_reload_image(arg_t);
-int it_remove_image(arg_t);
-int i_navigate(arg_t);
-int it_first(arg_t);
-int it_last(arg_t);
-int i_navigate_frame(arg_t);
-int i_toggle_animation(arg_t);
-int it_move(arg_t);
-int i_pan_screen(arg_t);
-int i_pan_edge(arg_t);
-int i_drag(arg_t);
-int i_zoom(arg_t);
-int i_fit_to_win(arg_t);
-int i_fit_to_img(arg_t);
-int i_rotate(arg_t);
-int i_toggle_slideshow(arg_t);
-int i_adjust_slideshow(arg_t);
-int i_toggle_antialias(arg_t);
-int it_toggle_alpha(arg_t);
-int it_open_with(arg_t);
-int it_shell_cmd(arg_t);
+bool it_quit(arg_t);
+bool it_switch_mode(arg_t);
+bool it_toggle_fullscreen(arg_t);
+bool it_reload_image(arg_t);
+bool it_remove_image(arg_t);
+bool i_navigate(arg_t);
+bool it_first(arg_t);
+bool it_last(arg_t);
+bool i_navigate_frame(arg_t);
+bool i_toggle_animation(arg_t);
+bool it_move(arg_t);
+bool i_pan_screen(arg_t);
+bool i_pan_edge(arg_t);
+bool i_drag(arg_t);
+bool i_zoom(arg_t);
+bool i_fit_to_win(arg_t);
+bool i_fit_to_img(arg_t);
+bool i_rotate(arg_t);
+bool i_toggle_slideshow(arg_t);
+bool i_adjust_slideshow(arg_t);
+bool i_toggle_antialias(arg_t);
+bool it_toggle_alpha(arg_t);
+bool it_open_with(arg_t);
+bool it_shell_cmd(arg_t);
 
 #endif /* COMMANDS_H */
diff --git a/config.def.h b/config.def.h
index 50cecb8..022bf9a 100644
--- a/config.def.h
+++ b/config.def.h
@@ -51,96 +51,96 @@ enum { THUMB_SIZE = 60 };
 /* keyboard mappings for image and thumbnail mode: */
 static const keymap_t keys[] = {
 	/* ctrl   key               function              argument */
-	{ False,  XK_q,             it_quit,              (arg_t) None },
-	{ False,  XK_Return,        it_switch_mode,       (arg_t) None },
-	{ False,  XK_f,             it_toggle_fullscreen, (arg_t) None },
-
-	{ False,  XK_r,             it_reload_image,      (arg_t) None },
-	{ False,  XK_D,             it_remove_image,      (arg_t) None },
-
-	{ False,  XK_n,             i_navigate,           (arg_t) +1 },
-	{ False,  XK_space,         i_navigate,           (arg_t) +1 },
-	{ False,  XK_p,             i_navigate,           (arg_t) -1 },
-	{ False,  XK_BackSpace,     i_navigate,           (arg_t) -1 },
-	{ False,  XK_bracketright,  i_navigate,           (arg_t) +10 },
-	{ False,  XK_bracketleft,   i_navigate,           (arg_t) -10 },
-	{ False,  XK_g,             it_first,             (arg_t) None },
-	{ False,  XK_G,             it_last,              (arg_t) None },
-
-	{ True,   XK_n,             i_navigate_frame,     (arg_t) +1 },
-	{ True,   XK_p,             i_navigate_frame,     (arg_t) -1 },
-	{ True,   XK_space,         i_toggle_animation,   (arg_t) None },
-
-	{ False,  XK_h,             it_move,              (arg_t) DIR_LEFT },
-	{ False,  XK_Left,          it_move,              (arg_t) DIR_LEFT },
-	{ False,  XK_j,             it_move,              (arg_t) DIR_DOWN },
-	{ False,  XK_Down,          it_move,              (arg_t) DIR_DOWN },
-	{ False,  XK_k,             it_move,              (arg_t) DIR_UP },
-	{ False,  XK_Up,            it_move,              (arg_t) DIR_UP },
-	{ False,  XK_l,             it_move,              (arg_t) DIR_RIGHT },
-	{ False,  XK_Right,         it_move,              (arg_t) DIR_RIGHT },
-
-	{ True,   XK_h,             i_pan_screen,         (arg_t) DIR_LEFT },
-	{ True,   XK_Left,          i_pan_screen,         (arg_t) DIR_LEFT },
-	{ True,   XK_j,             i_pan_screen,         (arg_t) DIR_DOWN },
-	{ True,   XK_Down,          i_pan_screen,         (arg_t) DIR_DOWN },
-	{ True,   XK_k,             i_pan_screen,         (arg_t) DIR_UP },
-	{ True,   XK_Up,            i_pan_screen,         (arg_t) DIR_UP },
-	{ True,   XK_l,             i_pan_screen,         (arg_t) DIR_RIGHT },
-	{ True,   XK_Right,         i_pan_screen,         (arg_t) DIR_RIGHT },
-
-	{ False,  XK_H,             i_pan_edge,           (arg_t) DIR_LEFT },
-	{ False,  XK_J,             i_pan_edge,           (arg_t) DIR_DOWN },
-	{ False,  XK_K,             i_pan_edge,           (arg_t) DIR_UP },
-	{ False,  XK_L,             i_pan_edge,           (arg_t) DIR_RIGHT },
-
-	{ False,  XK_plus,          i_zoom,               (arg_t) +1 },
-	{ False,  XK_equal,         i_zoom,               (arg_t) +1 },
-	{ False,  XK_KP_Add,        i_zoom,               (arg_t) +1 },
-	{ False,  XK_minus,         i_zoom,               (arg_t) -1 },
-	{ False,  XK_KP_Subtract,   i_zoom,               (arg_t) -1 },
-	{ False,  XK_0,             i_zoom,               (arg_t) None },
-	{ False,  XK_KP_0,          i_zoom,               (arg_t) None },
-	{ False,  XK_w,             i_fit_to_win,         (arg_t) None },
-	{ False,  XK_W,             i_fit_to_img,         (arg_t) None },
-
-	{ False,  XK_less,          i_rotate,             (arg_t) DIR_LEFT },
-	{ False,  XK_greater,       i_rotate,             (arg_t) DIR_RIGHT },
-
-	{ False,  XK_s,             i_toggle_slideshow,   (arg_t) None },
-	{ True,   XK_plus,          i_adjust_slideshow,   (arg_t) +1 },
-	{ True,   XK_equal,         i_adjust_slideshow,   (arg_t) +1 },
-	{ True,   XK_minus,         i_adjust_slideshow,   (arg_t) -1 },
-
-	{ False,  XK_a,             i_toggle_antialias,   (arg_t) None },
-	{ False,  XK_A,             it_toggle_alpha,      (arg_t) None },
+	{ false,  XK_q,             it_quit,              (arg_t) None },
+	{ false,  XK_Return,        it_switch_mode,       (arg_t) None },
+	{ false,  XK_f,             it_toggle_fullscreen, (arg_t) None },
+
+	{ false,  XK_r,             it_reload_image,      (arg_t) None },
+	{ false,  XK_D,             it_remove_image,      (arg_t) None },
+
+	{ false,  XK_n,             i_navigate,           (arg_t) +1 },
+	{ false,  XK_space,         i_navigate,           (arg_t) +1 },
+	{ false,  XK_p,             i_navigate,           (arg_t) -1 },
+	{ false,  XK_BackSpace,     i_navigate,           (arg_t) -1 },
+	{ false,  XK_bracketright,  i_navigate,           (arg_t) +10 },
+	{ false,  XK_bracketleft,   i_navigate,           (arg_t) -10 },
+	{ false,  XK_g,             it_first,             (arg_t) None },
+	{ false,  XK_G,             it_last,              (arg_t) None },
+
+	{ true,   XK_n,             i_navigate_frame,     (arg_t) +1 },
+	{ true,   XK_p,             i_navigate_frame,     (arg_t) -1 },
+	{ true,   XK_space,         i_toggle_animation,   (arg_t) None },
+
+	{ false,  XK_h,             it_move,              (arg_t) DIR_LEFT },
+	{ false,  XK_Left,          it_move,              (arg_t) DIR_LEFT },
+	{ false,  XK_j,             it_move,              (arg_t) DIR_DOWN },
+	{ false,  XK_Down,          it_move,              (arg_t) DIR_DOWN },
+	{ false,  XK_k,             it_move,              (arg_t) DIR_UP },
+	{ false,  XK_Up,            it_move,              (arg_t) DIR_UP },
+	{ false,  XK_l,             it_move,              (arg_t) DIR_RIGHT },
+	{ false,  XK_Right,         it_move,              (arg_t) DIR_RIGHT },
+
+	{ true,   XK_h,             i_pan_screen,         (arg_t) DIR_LEFT },
+	{ true,   XK_Left,          i_pan_screen,         (arg_t) DIR_LEFT },
+	{ true,   XK_j,             i_pan_screen,         (arg_t) DIR_DOWN },
+	{ true,   XK_Down,          i_pan_screen,         (arg_t) DIR_DOWN },
+	{ true,   XK_k,             i_pan_screen,         (arg_t) DIR_UP },
+	{ true,   XK_Up,            i_pan_screen,         (arg_t) DIR_UP },
+	{ true,   XK_l,             i_pan_screen,         (arg_t) DIR_RIGHT },
+	{ true,   XK_Right,         i_pan_screen,         (arg_t) DIR_RIGHT },
+
+	{ false,  XK_H,             i_pan_edge,           (arg_t) DIR_LEFT },
+	{ false,  XK_J,             i_pan_edge,           (arg_t) DIR_DOWN },
+	{ false,  XK_K,             i_pan_edge,           (arg_t) DIR_UP },
+	{ false,  XK_L,             i_pan_edge,           (arg_t) DIR_RIGHT },
+
+	{ false,  XK_plus,          i_zoom,               (arg_t) +1 },
+	{ false,  XK_equal,         i_zoom,               (arg_t) +1 },
+	{ false,  XK_KP_Add,        i_zoom,               (arg_t) +1 },
+	{ false,  XK_minus,         i_zoom,               (arg_t) -1 },
+	{ false,  XK_KP_Subtract,   i_zoom,               (arg_t) -1 },
+	{ false,  XK_0,             i_zoom,               (arg_t) None },
+	{ false,  XK_KP_0,          i_zoom,               (arg_t) None },
+	{ false,  XK_w,             i_fit_to_win,         (arg_t) None },
+	{ false,  XK_W,             i_fit_to_img,         (arg_t) None },
+
+	{ false,  XK_less,          i_rotate,             (arg_t) DIR_LEFT },
+	{ false,  XK_greater,       i_rotate,             (arg_t) DIR_RIGHT },
+
+	{ false,  XK_s,             i_toggle_slideshow,   (arg_t) None },
+	{ true,   XK_plus,          i_adjust_slideshow,   (arg_t) +1 },
+	{ true,   XK_equal,         i_adjust_slideshow,   (arg_t) +1 },
+	{ true,   XK_minus,         i_adjust_slideshow,   (arg_t) -1 },
+
+	{ false,  XK_a,             i_toggle_antialias,   (arg_t) None },
+	{ false,  XK_A,             it_toggle_alpha,      (arg_t) None },
 
 	/* open current image with given program: */
-	{ True,   XK_g,             it_open_with,         (arg_t) "gimp" },
+	{ true,   XK_g,             it_open_with,         (arg_t) "gimp" },
 
 	/* run shell command line on current file ("$SXIV_IMG"): */
-	{ True,   XK_less,          it_shell_cmd,         (arg_t) \
+	{ true,   XK_less,          it_shell_cmd,         (arg_t) \
 			"mogrify -rotate -90 \"$SXIV_IMG\"" },
-	{ True,   XK_greater,       it_shell_cmd,         (arg_t) \
+	{ true,   XK_greater,       it_shell_cmd,         (arg_t) \
 			"mogrify -rotate +90 \"$SXIV_IMG\"" },
-	{ True,   XK_comma,         it_shell_cmd,         (arg_t) \
+	{ true,   XK_comma,         it_shell_cmd,         (arg_t) \
 			"jpegtran -rotate 270 -copy all -outfile \"$SXIV_IMG\" \"$SXIV_IMG\"" },
-	{ True,   XK_period,        it_shell_cmd,         (arg_t) \
+	{ true,   XK_period,        it_shell_cmd,         (arg_t) \
 			"jpegtran -rotate  90 -copy all -outfile \"$SXIV_IMG\" \"$SXIV_IMG\"" },
 };
 
 /* mouse button mappings for image mode: */
 static const button_t buttons[] = {
 	/* ctrl   shift   button    function              argument */
-	{ False,  False,  Button1,  i_navigate,           (arg_t) +1 },
-	{ False,  False,  Button3,  i_navigate,           (arg_t) -1 },
-	{ False,  False,  Button2,  i_drag,               (arg_t) None },
-	{ False,  False,  Button4,  it_move,              (arg_t) DIR_UP },
-	{ False,  False,  Button5,  it_move,              (arg_t) DIR_DOWN },
-	{ False,  True,   Button4,  it_move,              (arg_t) DIR_LEFT },
-	{ False,  True,   Button5,  it_move,              (arg_t) DIR_RIGHT },
-	{ True,   False,  Button4,  i_zoom,               (arg_t) +1 },
-	{ True,   False,  Button5,  i_zoom,               (arg_t) -1 },
+	{ false,  false,  Button1,  i_navigate,           (arg_t) +1 },
+	{ false,  false,  Button3,  i_navigate,           (arg_t) -1 },
+	{ false,  false,  Button2,  i_drag,               (arg_t) None },
+	{ false,  false,  Button4,  it_move,              (arg_t) DIR_UP },
+	{ false,  false,  Button5,  it_move,              (arg_t) DIR_DOWN },
+	{ false,  true,   Button4,  it_move,              (arg_t) DIR_LEFT },
+	{ false,  true,   Button5,  it_move,              (arg_t) DIR_RIGHT },
+	{ true,   false,  Button4,  i_zoom,               (arg_t) +1 },
+	{ true,   false,  Button5,  i_zoom,               (arg_t) -1 },
 };
 
 #endif
diff --git a/image.c b/image.c
index fd6585b..8b4ff49 100644
--- a/image.c
+++ b/image.c
@@ -51,15 +51,15 @@ void img_init(img_t *img, win_t *win) {
 	if (img) {
 		img->im = NULL;
 		img->multi.cap = img->multi.cnt = 0;
-		img->multi.animate = 0;
+		img->multi.animate = false;
 		img->zoom = options->zoom;
 		img->zoom = MAX(img->zoom, zoom_min);
 		img->zoom = MIN(img->zoom, zoom_max);
-		img->checkpan = 0;
-		img->dirty = 0;
+		img->checkpan = false;
+		img->dirty = false;
 		img->aa = options->aa;
-		img->alpha = 1;
-		img->slideshow = 0;
+		img->alpha = true;
+		img->slideshow = false;
 		img->ss_delay = SLIDESHOW_DELAY * 1000;
 	}
 
@@ -119,7 +119,7 @@ void exif_auto_orientate(const fileinfo_t *file) {
 /* Originally based on, but in its current form merely inspired by Imlib2's
  * src/modules/loaders/loader_gif.c:load(), written by Carsten Haitzler.
  */
-int img_load_gif(img_t *img, const fileinfo_t *file) {
+bool img_load_gif(img_t *img, const fileinfo_t *file) {
 	GifFileType *gif;
 	GifRowType *rows = NULL;
 	GifRecordType rec;
@@ -131,8 +131,9 @@ int img_load_gif(img_t *img, const fileinfo_t *file) {
 	int x, y, w, h, sw, sh;
 	int intoffset[] = { 0, 4, 2, 1 };
 	int intjump[] = { 8, 8, 4, 2 };
-	int err = 0, transp = -1;
+	int transp = -1;
 	unsigned int delay = 0;
+	bool err = false;
 
 	if (img->multi.cap == 0) {
 		img->multi.cap = 8;
@@ -145,7 +146,7 @@ int img_load_gif(img_t *img, const fileinfo_t *file) {
 	gif = DGifOpenFileName(file->path);
 	if (!gif) {
 		warn("could not open gif file: %s", file->name);
-		return 0;
+		return false;
 	}
 	bg = gif->SBackGroundColor;
 	sw = gif->SWidth;
@@ -153,7 +154,7 @@ int img_load_gif(img_t *img, const fileinfo_t *file) {
 
 	do {
 		if (DGifGetRecordType(gif, &rec) == GIF_ERROR) {
-			err = 1;
+			err = true;
 			break;
 		}
 		if (rec == EXTENSION_RECORD_TYPE) {
@@ -177,7 +178,7 @@ int img_load_gif(img_t *img, const fileinfo_t *file) {
 			}
 		} else if (rec == IMAGE_DESC_RECORD_TYPE) {
 			if (DGifGetImageDesc(gif) == GIF_ERROR) {
-				err = 1;
+				err = true;
 				break;
 			}
 			x = gif->Image.Left;
@@ -235,7 +236,7 @@ int img_load_gif(img_t *img, const fileinfo_t *file) {
 			free(data);
 
 			if (!im) {
-				err = 1;
+				err = true;
 				break;
 			}
 
@@ -272,7 +273,7 @@ int img_load_gif(img_t *img, const fileinfo_t *file) {
 		imlib_context_set_image(img->multi.frames[0].im);
 		imlib_free_image();
 		img->multi.cnt = 0;
-		img->multi.animate = 0;
+		img->multi.animate = false;
 	}
 
 	imlib_context_set_image(img->im);
@@ -281,15 +282,15 @@ int img_load_gif(img_t *img, const fileinfo_t *file) {
 }
 #endif /* GIF_SUPPORT */
 
-int img_load(img_t *img, const fileinfo_t *file) {
+bool img_load(img_t *img, const fileinfo_t *file) {
 	const char *fmt;
 
 	if (!img || !file || !file->name || !file->path)
-		return 0;
+		return false;
 
 	if (access(file->path, R_OK) || !(img->im = imlib_load_image(file->path))) {
 		warn("could not open image: %s", file->name);
-		return 0;
+		return false;
 	}
 
 	imlib_context_set_image(img->im);
@@ -310,17 +311,17 @@ int img_load(img_t *img, const fileinfo_t *file) {
 #endif
 
 	img->scalemode = options->scalemode;
-	img->re = 0;
-	img->checkpan = 0;
+	img->re = false;
+	img->checkpan = false;
+	img->dirty = true;
 
 	img->w = imlib_image_get_width();
 	img->h = imlib_image_get_height();
 
-	img->dirty = 1;
-	return 1;
+	return true;
 }
 
-void img_close(img_t *img, int decache) {
+void img_close(img_t *img, bool decache) {
 	int i;
 
 	if (!img)
@@ -343,7 +344,7 @@ void img_close(img_t *img, int decache) {
 	}
 }
 
-void img_check_pan(img_t *img, win_t *win, int moved) {
+void img_check_pan(img_t *img, win_t *win, bool moved) {
 	int ox, oy;
 
 	if (!img || !win)
@@ -370,14 +371,14 @@ void img_check_pan(img_t *img, win_t *win, int moved) {
 	}
 
 	if (!moved && (ox != img->x || oy != img->y))
-		img->dirty = 1;
+		img->dirty = true;
 }
 
-int img_fit(img_t *img, win_t *win) {
+bool img_fit(img_t *img, win_t *win) {
 	float z, zmax, zw, zh;
 
 	if (!img || !win || img->scalemode == SCALE_ZOOM)
-		return 0;
+		return false;
 
 	zmax = img->scalemode == SCALE_DOWN ? 1.0 : zoom_max;
 	zw = (float) win->w / (float) img->w;
@@ -389,10 +390,10 @@ int img_fit(img_t *img, win_t *win) {
 
 	if (ZOOMDIFF(z, img->zoom)) {
 		img->zoom = z;
-		img->dirty = 1;
-		return 1;
+		img->dirty = true;
+		return true;
 	} else {
-		return 0;
+		return false;
 	}
 }
 
@@ -407,7 +408,7 @@ void img_render(img_t *img, win_t *win) {
 
 	if (!img->re) {
 		/* rendered for the first time */
-		img->re = 1;
+		img->re = true;
 		if (img->zoom * img->w <= win->w)
 			img->x = (win->w - img->w * img->zoom) / 2;
 		else
@@ -419,8 +420,8 @@ void img_render(img_t *img, win_t *win) {
 	}
 	
 	if (img->checkpan) {
-		img_check_pan(img, win, 0);
-		img->checkpan = 0;
+		img_check_pan(img, win, false);
+		img->checkpan = false;
 	}
 
 	if (!img->dirty)
@@ -462,22 +463,22 @@ void img_render(img_t *img, win_t *win) {
 
 	win_draw(win);
 
-	img->dirty = 0;
+	img->dirty = false;
 }
 
-int img_fit_win(img_t *img, win_t *win) {
+bool img_fit_win(img_t *img, win_t *win) {
 	if (!img || !img->im || !win)
-		return 0;
+		return false;
 
 	img->scalemode = SCALE_FIT;
 	return img_fit(img, win);
 }
 
-int img_center(img_t *img, win_t *win) {
+bool img_center(img_t *img, win_t *win) {
 	int ox, oy;
 
 	if (!img || !win)
-		return 0;
+		return false;
 	
 	ox = img->x;
 	oy = img->y;
@@ -486,16 +487,16 @@ int img_center(img_t *img, win_t *win) {
 	img->y = (win->h - img->h * img->zoom) / 2;
 	
 	if (ox != img->x || oy != img->y) {
-		img->dirty = 1;
-		return 1;
+		img->dirty = true;
+		return true;
 	} else {
-		return 0;
+		return false;
 	}
 }
 
-int img_zoom(img_t *img, win_t *win, float z) {
+bool img_zoom(img_t *img, win_t *win, float z) {
 	if (!img || !img->im || !win)
-		return 0;
+		return false;
 
 	z = MAX(z, zoom_min);
 	z = MIN(z, zoom_max);
@@ -506,45 +507,45 @@ int img_zoom(img_t *img, win_t *win, float z) {
 		img->x = win->w / 2 - (win->w / 2 - img->x) * z / img->zoom;
 		img->y = win->h / 2 - (win->h / 2 - img->y) * z / img->zoom;
 		img->zoom = z;
-		img->checkpan = 1;
-		img->dirty = 1;
-		return 1;
+		img->checkpan = true;
+		img->dirty = true;
+		return true;
 	} else {
-		return 0;
+		return false;
 	}
 }
 
-int img_zoom_in(img_t *img, win_t *win) {
+bool img_zoom_in(img_t *img, win_t *win) {
 	int i;
 
 	if (!img || !img->im || !win)
-		return 0;
+		return false;
 
 	for (i = 1; i < ARRLEN(zoom_levels); i++) {
 		if (zoom_levels[i] > img->zoom * 100.0)
 			return img_zoom(img, win, zoom_levels[i] / 100.0);
 	}
-	return 0;
+	return false;
 }
 
-int img_zoom_out(img_t *img, win_t *win) {
+bool img_zoom_out(img_t *img, win_t *win) {
 	int i;
 
 	if (!img || !img->im || !win)
-		return 0;
+		return false;
 
 	for (i = ARRLEN(zoom_levels) - 2; i >= 0; i--) {
 		if (zoom_levels[i] < img->zoom * 100.0)
 			return img_zoom(img, win, zoom_levels[i] / 100.0);
 	}
-	return 0;
+	return false;
 }
 
-int img_move(img_t *img, win_t *win, int dx, int dy) {
+bool img_move(img_t *img, win_t *win, int dx, int dy) {
 	int ox, oy;
 
 	if (!img || !img->im || !win)
-		return 0;
+		return false;
 
 	ox = img->x;
 	oy = img->y;
@@ -552,19 +553,19 @@ int img_move(img_t *img, win_t *win, int dx, int dy) {
 	img->x += dx;
 	img->y += dy;
 
-	img_check_pan(img, win, 1);
+	img_check_pan(img, win, true);
 
 	if (ox != img->x || oy != img->y) {
-		img->dirty = 1;
-		return 1;
+		img->dirty = true;
+		return true;
 	} else {
-		return 0;
+		return false;
 	}
 }
 
-int img_pan(img_t *img, win_t *win, direction_t dir, int screen) {
+bool img_pan(img_t *img, win_t *win, direction_t dir, bool screen) {
 	if (!img || !img->im || !win)
-		return 0;
+		return false;
 
 	switch (dir) {
 		case DIR_LEFT:
@@ -576,14 +577,14 @@ int img_pan(img_t *img, win_t *win, direction_t dir, int screen) {
 		case DIR_DOWN:
 			return img_move(img, win, 0, win->h / (screen ? 1 : 5) * -1);
 	}
-	return 0;
+	return false;
 }
 
-int img_pan_edge(img_t *img, win_t *win, direction_t dir) {
+bool img_pan_edge(img_t *img, win_t *win, direction_t dir) {
 	int ox, oy;
 
 	if (!img || !img->im || !win)
-		return 0;
+		return false;
 
 	ox = img->x;
 	oy = img->y;
@@ -603,13 +604,13 @@ int img_pan_edge(img_t *img, win_t *win, direction_t dir) {
 			break;
 	}
 
-	img_check_pan(img, win, 1);
+	img_check_pan(img, win, true);
 
 	if (ox != img->x || oy != img->y) {
-		img->dirty = 1;
-		return 1;
+		img->dirty = true;
+		return true;
 	} else {
-		return 0;
+		return false;
 	}
 }
 
@@ -632,8 +633,8 @@ void img_rotate(img_t *img, win_t *win, int d) {
 	img->w = img->h;
 	img->h = tmp;
 
-	img->checkpan = 1;
-	img->dirty = 1;
+	img->checkpan = true;
+	img->dirty = true;
 }
 
 void img_rotate_left(img_t *img, win_t *win) {
@@ -648,18 +649,18 @@ void img_toggle_antialias(img_t *img) {
 	if (!img || !img->im)
 		return;
 
-	img->aa ^= 1;
+	img->aa = !img->aa;
 	imlib_context_set_image(img->im);
 	imlib_context_set_anti_alias(img->aa);
-	img->dirty = 1;
+	img->dirty = true;
 }
 
-int img_frame_goto(img_t *img, int n) {
+bool img_frame_goto(img_t *img, int n) {
 	if (!img || n < 0 || n >= img->multi.cnt)
-		return 0;
+		return false;
 
 	if (n == img->multi.sel)
-		return 0;
+		return false;
 
 	img->multi.sel = n;
 	img->im = img->multi.frames[n].im;
@@ -667,15 +668,15 @@ int img_frame_goto(img_t *img, int n) {
 	imlib_context_set_image(img->im);
 	img->w = imlib_image_get_width();
 	img->h = imlib_image_get_height();
-	img->checkpan = 1;
-	img->dirty = 1;
+	img->checkpan = true;
+	img->dirty = true;
 
-	return 1;
+	return true;
 }
 
-int img_frame_navigate(img_t *img, int d) {
+bool img_frame_navigate(img_t *img, int d) {
 	if (!img || !img->multi.cnt || !d)
-		return 0;
+		return false;
 
 	d += img->multi.sel;
 	if (d < 0)
@@ -686,22 +687,22 @@ int img_frame_navigate(img_t *img, int d) {
 	return img_frame_goto(img, d);
 }
 
-int img_frame_animate(img_t *img, int restart) {
+bool img_frame_animate(img_t *img, bool restart) {
 	if (!img || !img->multi.cnt)
-		return 0;
+		return false;
 
 	if (img->multi.sel + 1 >= img->multi.cnt) {
 		if (restart || (GIF_LOOP && !img->slideshow)) {
 			img_frame_goto(img, 0);
 		} else {
-			img->multi.animate = 0;
-			return 0;
+			img->multi.animate = false;
+			return false;
 		}
 	} else if (!restart) {
 		img_frame_goto(img, img->multi.sel + 1);
 	}
-	img->multi.animate = 1;
+	img->multi.animate = true;
+	img->dirty = true;
 
-	img->dirty = 1;
-	return img->multi.frames[img->multi.sel].delay;
+	return true;
 }
diff --git a/image.h b/image.h
index ca699c8..316729a 100644
--- a/image.h
+++ b/image.h
@@ -34,7 +34,7 @@ typedef struct {
 	int cap;
 	int cnt;
 	int sel;
-	unsigned char animate;
+	bool animate;
 } multi_img_t;
 
 typedef struct {
@@ -44,13 +44,13 @@ typedef struct {
 	float zoom;
 	scalemode_t scalemode;
 
-	unsigned char re;
-	unsigned char checkpan;
-	unsigned char dirty;
-	unsigned char aa;
-	unsigned char alpha;
+	bool re;
+	bool checkpan;
+	bool dirty;
+	bool aa;
+	bool alpha;
 
-	unsigned char slideshow;
+	bool slideshow;
 	int ss_delay; /* in ms */
 
 	int x;
@@ -61,28 +61,28 @@ typedef struct {
 
 void img_init(img_t*, win_t*);
 
-int img_load(img_t*, const fileinfo_t*);
-void img_close(img_t*, int);
+bool img_load(img_t*, const fileinfo_t*);
+void img_close(img_t*, bool);
 
 void img_render(img_t*, win_t*);
 
-int img_fit_win(img_t*, win_t*);
-int img_center(img_t*, win_t*);
+bool img_fit_win(img_t*, win_t*);
+bool img_center(img_t*, win_t*);
 
-int img_zoom(img_t*, win_t*, float);
-int img_zoom_in(img_t*, win_t*);
-int img_zoom_out(img_t*, win_t*);
+bool img_zoom(img_t*, win_t*, float);
+bool img_zoom_in(img_t*, win_t*);
+bool img_zoom_out(img_t*, win_t*);
 
-int img_move(img_t*, win_t*, int, int);
-int img_pan(img_t*, win_t*, direction_t, int);
-int img_pan_edge(img_t*, win_t*, direction_t);
+bool img_move(img_t*, win_t*, int, int);
+bool img_pan(img_t*, win_t*, direction_t, bool);
+bool img_pan_edge(img_t*, win_t*, direction_t);
 
 void img_rotate_left(img_t*, win_t*);
 void img_rotate_right(img_t*, win_t*);
 
 void img_toggle_antialias(img_t*);
 
-int img_frame_navigate(img_t*, int);
-int img_frame_animate(img_t*, int);
+bool img_frame_navigate(img_t*, int);
+bool img_frame_animate(img_t*, bool);
 
 #endif /* IMAGE_H */
diff --git a/main.c b/main.c
index c96a030..36bbb6d 100644
--- a/main.c
+++ b/main.c
@@ -17,6 +17,7 @@
  */
 
 #define _POSIX_C_SOURCE 200112L
+#define _MAPPINGS_CONFIG
 
 #include <stdlib.h>
 #include <stdio.h>
@@ -34,8 +35,6 @@
 #include "types.h"
 #include "util.h"
 #include "window.h"
-
-#define _MAPPINGS_CONFIG
 #include "config.h"
 
 enum {
@@ -45,7 +44,7 @@ enum {
 
 typedef struct {
 	struct timeval when;
-	Bool active;
+	bool active;
 	timeout_f handler;
 } timeout_t;
 
@@ -67,17 +66,17 @@ size_t filesize;
 char win_title[TITLE_LEN];
 
 timeout_t timeouts[] = {
-	{ { 0, 0 }, False, redraw },
-	{ { 0, 0 }, False, reset_cursor },
-	{ { 0, 0 }, False, animate },
-	{ { 0, 0 }, False, slideshow },
+	{ { 0, 0 }, false, redraw },
+	{ { 0, 0 }, false, reset_cursor },
+	{ { 0, 0 }, false, animate },
+	{ { 0, 0 }, false, slideshow },
 };
 
 void cleanup() {
 	static int in = 0;
 
 	if (!in++) {
-		img_close(&img, 0);
+		img_close(&img, false);
 		tns_free(&tns);
 		win_close(&win);
 	}
@@ -103,14 +102,14 @@ void check_add_file(char *filename) {
 			return;
 		}
 	}
-	files[fileidx].loaded = 0;
+	files[fileidx].loaded = false;
 	files[fileidx].name = s_strdup(filename);
 	if (*filename == '/')
 		files[fileidx].path = files[fileidx].name;
 	fileidx++;
 }
 
-void remove_file(int n, unsigned char silent) {
+void remove_file(int n, bool silent) {
 	if (n < 0 || n >= filecnt)
 		return;
 
@@ -138,7 +137,7 @@ void remove_file(int n, unsigned char silent) {
 		tns.cnt--;
 }
 
-void set_timeout(timeout_f handler, int time, int overwrite) {
+void set_timeout(timeout_f handler, int time, bool overwrite) {
 	int i;
 
 	for (i = 0; i < ARRLEN(timeouts); i++) {
@@ -146,7 +145,7 @@ void set_timeout(timeout_f handler, int time, int overwrite) {
 			if (!timeouts[i].active || overwrite) {
 				gettimeofday(&timeouts[i].when, 0);
 				MSEC_ADD_TO_TIMEVAL(time, &timeouts[i].when);
-				timeouts[i].active = True;
+				timeouts[i].active = true;
 			}
 			return;
 		}
@@ -158,13 +157,13 @@ void reset_timeout(timeout_f handler) {
 
 	for (i = 0; i < ARRLEN(timeouts); i++) {
 		if (timeouts[i].handler == handler) {
-			timeouts[i].active = False;
+			timeouts[i].active = false;
 			return;
 		}
 	}
 }
 
-int check_timeouts(struct timeval *t) {
+bool check_timeouts(struct timeval *t) {
 	int i = 0, tdiff, tmin = -1;
 	struct timeval now;
 
@@ -173,7 +172,7 @@ int check_timeouts(struct timeval *t) {
 		if (timeouts[i].active) {
 			tdiff = TIMEDIFF(&timeouts[i].when, &now);
 			if (tdiff <= 0) {
-				timeouts[i].active = False;
+				timeouts[i].active = false;
 				if (timeouts[i].handler)
 					timeouts[i].handler();
 				i = tmin = -1;
@@ -196,14 +195,14 @@ void load_image(int new) {
 
 	win_set_cursor(&win, CURSOR_WATCH);
 
-	img_close(&img, 0);
+	img_close(&img, false);
 	while (!img_load(&img, &files[new])) {
-		remove_file(new, 0);
+		remove_file(new, false);
 		if (new >= filecnt)
 			new = filecnt - 1;
 	}
 
-	files[new].loaded = 1;
+	files[new].loaded = true;
 	fileidx = new;
 	if (!stat(files[new].path, &fstats))
 		filesize = fstats.st_size;
@@ -211,7 +210,7 @@ void load_image(int new) {
 		filesize = 0;
 
 	if (img.multi.cnt && img.multi.animate)
-		set_timeout(animate, img.multi.frames[img.multi.sel].delay, 1);
+		set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
 	else
 		reset_timeout(animate);
 }
@@ -265,9 +264,9 @@ void redraw() {
 		img_render(&img, &win);
 		if (img.slideshow && !img.multi.animate) {
 			if (fileidx + 1 < filecnt)
-				set_timeout(slideshow, img.ss_delay, 1);
+				set_timeout(slideshow, img.ss_delay, true);
 			else
-				img.slideshow = 0;
+				img.slideshow = false;
 		}
 	} else {
 		tns_render(&tns, &win);
@@ -299,12 +298,10 @@ void reset_cursor() {
 }
 
 void animate() {
-	int delay;
-
-	delay = img_frame_animate(&img, 0);
-	redraw();
-	if (delay)
-		set_timeout(animate, delay, 1);
+	if (img_frame_animate(&img, false)) {
+		redraw();
+		set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
+	}
 }
 
 void slideshow() {
@@ -313,16 +310,16 @@ void slideshow() {
 			load_image(fileidx + 1);
 			redraw();
 		} else {
-			img.slideshow = 0;
+			img.slideshow = false;
 		}
 	}
 }
 
-Bool keymask(const keymap_t *k, unsigned int state) {
+bool keymask(const keymap_t *k, unsigned int state) {
 	return (k->ctrl ? ControlMask : 0) == (state & ControlMask);
 }
 
-Bool buttonmask(const button_t *b, unsigned int state) {
+bool buttonmask(const button_t *b, unsigned int state) {
 	return ((b->ctrl ? ControlMask : 0) | (b->shift ? ShiftMask : 0)) ==
 	       (state & (ControlMask | ShiftMask));
 }
@@ -354,7 +351,7 @@ void on_buttonpress(XButtonEvent *bev) {
 
 	if (mode == MODE_IMAGE) {
 		win_set_cursor(&win, CURSOR_ARROW);
-		set_timeout(reset_cursor, TO_CURSOR_HIDE, 1);
+		set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
 
 		for (i = 0; i < ARRLEN(buttons); i++) {
 			if (buttons[i].button == bev->button &&
@@ -372,11 +369,11 @@ void on_buttonpress(XButtonEvent *bev) {
 				if ((sel = tns_translate(&tns, bev->x, bev->y)) >= 0) {
 					if (sel == tns.sel) {
 						mode = MODE_IMAGE;
-						set_timeout(reset_cursor, TO_CURSOR_HIDE, 1);
+						set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
 						load_image(tns.sel);
 					} else {
-						tns_highlight(&tns, &win, tns.sel, False);
-						tns_highlight(&tns, &win, sel, True);
+						tns_highlight(&tns, &win, tns.sel, false);
+						tns_highlight(&tns, &win, sel, true);
 						tns.sel = sel;
 					}
 					redraw();
@@ -405,11 +402,11 @@ void run() {
 		       !XPending(win.env.dpy))
 		{
 			/* load thumbnails */
-			set_timeout(redraw, TO_REDRAW_THUMBS, 0);
-			if (tns_load(&tns, tns.cnt, &files[tns.cnt], False, False))
+			set_timeout(redraw, TO_REDRAW_THUMBS, false);
+			if (tns_load(&tns, tns.cnt, &files[tns.cnt], false, false))
 				tns.cnt++;
 			else
-				remove_file(tns.cnt, 0);
+				remove_file(tns.cnt, false);
 			if (tns.cnt == filecnt)
 				redraw();
 			else
@@ -436,11 +433,11 @@ void run() {
 					break;
 				case ConfigureNotify:
 					if (win_configure(&win, &ev.xconfigure)) {
-						set_timeout(redraw, TO_REDRAW_RESIZE, 0);
+						set_timeout(redraw, TO_REDRAW_RESIZE, false);
 						if (mode == MODE_IMAGE)
-							img.checkpan = 1;
+							img.checkpan = true;
 						else
-							tns.dirty = 1;
+							tns.dirty = true;
 					}
 					break;
 				case KeyPress:
@@ -449,7 +446,7 @@ void run() {
 				case MotionNotify:
 					if (mode == MODE_IMAGE) {
 						win_set_cursor(&win, CURSOR_ARROW);
-						set_timeout(reset_cursor, TO_CURSOR_HIDE, 1);
+						set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
 					}
 					break;
 			}
@@ -539,11 +536,11 @@ int main(int argc, char **argv) {
 	win_init(&win);
 	img_init(&img, &win);
 
-	if (options->thumbnails) {
+	if (options->thumb_mode) {
 		mode = MODE_THUMB;
 		tns_init(&tns, filecnt);
-		while (!tns_load(&tns, 0, &files[0], False, False))
-			remove_file(0, 0);
+		while (!tns_load(&tns, 0, &files[0], false, false))
+			remove_file(0, false);
 		tns.cnt = 1;
 	} else {
 		mode = MODE_IMAGE;
diff --git a/options.c b/options.c
index 1e4a56c..13e1174 100644
--- a/options.c
+++ b/options.c
@@ -17,6 +17,7 @@
  */
 
 #define _POSIX_C_SOURCE 200112L
+#define _IMAGE_CONFIG
 
 #include <stdlib.h>
 #include <string.h>
@@ -25,8 +26,6 @@
 
 #include "options.h"
 #include "util.h"
-
-#define _IMAGE_CONFIG
 #include "config.h"
 
 options_t _options;
@@ -56,20 +55,20 @@ void print_version() {
 void parse_options(int argc, char **argv) {
 	int opt, t;
 
-	_options.recursive = 0;
+	_options.recursive = false;
 	_options.startnum = 0;
 
 	_options.scalemode = SCALE_MODE;
 	_options.zoom = 1.0;
-	_options.aa = 1;
+	_options.aa = true;
 
-	_options.fixed = 0;
-	_options.fullscreen = 0;
+	_options.fixed_win = false;
+	_options.fullscreen = false;
 	_options.geometry = NULL;
 
-	_options.quiet = 0;
-	_options.thumbnails = 0;
-	_options.clean_cache = 0;
+	_options.quiet = false;
+	_options.thumb_mode = false;
+	_options.clean_cache = false;
 
 	while ((opt = getopt(argc, argv, "cdFfg:hn:pqrstvZz:")) != -1) {
 		switch (opt) {
@@ -77,16 +76,16 @@ void parse_options(int argc, char **argv) {
 				print_usage();
 				exit(1);
 			case 'c':
-				_options.clean_cache = 1;
+				_options.clean_cache = true;
 				break;
 			case 'd':
 				_options.scalemode = SCALE_DOWN;
 				break;
 			case 'F':
-				_options.fixed = 1;
+				_options.fixed_win = true;
 				break;
 			case 'f':
-				_options.fullscreen = 1;
+				_options.fullscreen = true;
 				break;
 			case 'g':
 				_options.geometry = optarg;
@@ -104,19 +103,19 @@ void parse_options(int argc, char **argv) {
 				}
 				break;
 			case 'p':
-				_options.aa = 0;
+				_options.aa = false;
 				break;
 			case 'q':
-				_options.quiet = 1;
+				_options.quiet = true;
 				break;
 			case 'r':
-				_options.recursive = 1;
+				_options.recursive = true;
 				break;
 			case 's':
 				_options.scalemode = SCALE_FIT;
 				break;
 			case 't':
-				_options.thumbnails = 1;
+				_options.thumb_mode = true;
 				break;
 			case 'v':
 				print_version();
@@ -140,5 +139,5 @@ void parse_options(int argc, char **argv) {
 	_options.filenames = argv + optind;
 	_options.filecnt = argc - optind;
 	_options.from_stdin = _options.filecnt == 1 &&
-	                      strcmp(_options.filenames[0], "-") == 0;
+	                      !strcmp(_options.filenames[0], "-");
 }
diff --git a/options.h b/options.h
index 67ad926..3bf685a 100644
--- a/options.h
+++ b/options.h
@@ -25,25 +25,25 @@
 typedef struct {
 	/* file list: */
 	char **filenames;
-	unsigned char from_stdin;
-	unsigned char recursive;
+	bool from_stdin;
+	bool recursive;
 	int filecnt;
 	int startnum;
 
 	/* image: */
 	scalemode_t scalemode;
 	float zoom;
-	unsigned char aa;
+	bool aa;
 
 	/* window: */
-	unsigned char fixed;
-	unsigned char fullscreen;
+	bool fixed_win;
+	bool fullscreen;
 	char *geometry;
 
 	/* misc flags: */
-	unsigned char quiet;
-	unsigned char thumbnails;
-	unsigned char clean_cache;
+	bool quiet;
+	bool thumb_mode;
+	bool clean_cache;
 } options_t;
 
 extern const options_t *options;
diff --git a/thumbs.c b/thumbs.c
index 52597dd..fa54576 100644
--- a/thumbs.c
+++ b/thumbs.c
@@ -17,6 +17,7 @@
  */
 
 #define _POSIX_C_SOURCE 200112L
+#define _THUMBS_CONFIG
 
 #include <stdlib.h>
 #include <string.h>
@@ -27,8 +28,6 @@
 
 #include "thumbs.h"
 #include "util.h"
-
-#define _THUMBS_CONFIG
 #include "config.h"
 
 #ifdef EXIF_SUPPORT
@@ -38,7 +37,7 @@ void exif_auto_orientate(const fileinfo_t*);
 const int thumb_dim = THUMB_SIZE + 10;
 char *cache_dir = NULL;
 
-int tns_cache_enabled() {
+bool tns_cache_enabled() {
 	struct stat stats;
 
 	return cache_dir && !stat(cache_dir, &stats) && S_ISDIR(stats.st_mode) &&
@@ -81,7 +80,7 @@ Imlib_Image* tns_cache_load(const char *filepath) {
 	return im;
 }
 
-void tns_cache_write(thumb_t *t, Bool force) {
+void tns_cache_write(thumb_t *t, bool force) {
 	char *cfile, *dirend;
 	struct stat cstats, fstats;
 	struct utimbuf times;
@@ -120,7 +119,8 @@ void tns_cache_write(thumb_t *t, Bool force) {
 }
 
 void tns_clean_cache(tns_t *tns) {
-	int dirlen, delete;
+	int dirlen;
+	bool delete;
 	char *cfile, *filename, *tpos;
 	r_dir_t dir;
 
@@ -136,11 +136,12 @@ void tns_clean_cache(tns_t *tns) {
 
 	while ((cfile = r_readdir(&dir))) {
 		filename = cfile + dirlen;
-		delete = 0;
+		delete = false;
 
 		if ((tpos = strrchr(filename, '.'))) {
 			*tpos = '\0';
-			delete = access(filename, F_OK);
+			if (access(filename, F_OK))
+				delete = true;
 			*tpos = '.';
 		}
 
@@ -170,8 +171,8 @@ void tns_init(tns_t *tns, int cnt) {
 
 	tns->cnt = tns->first = tns->sel = 0;
 	tns->cap = cnt;
-	tns->alpha = 1;
-	tns->dirty = 0;
+	tns->alpha = true;
+	tns->dirty = false;
 
 	if ((homedir = getenv("HOME"))) {
 		if (cache_dir)
@@ -207,21 +208,21 @@ void tns_free(tns_t *tns) {
 	}
 }
 
-int tns_load(tns_t *tns, int n, const fileinfo_t *file,
-             Bool force, Bool silent)
+bool tns_load(tns_t *tns, int n, const fileinfo_t *file,
+             bool force, bool silent)
 {
 	int w, h;
-	int use_cache, cache_hit = 0;
+	bool use_cache, cache_hit = false;
 	float z, zw, zh;
 	thumb_t *t;
 	Imlib_Image *im;
 	const char *fmt;
 
 	if (!tns || !tns->thumbs || !file || !file->name || !file->path)
-		return 0;
+		return false;
 
 	if (n < 0 || n >= tns->cap)
-		return 0;
+		return false;
 
 	t = &tns->thumbs[n];
 	t->file = file;
@@ -233,7 +234,7 @@ int tns_load(tns_t *tns, int n, const fileinfo_t *file,
 
 	if ((use_cache = tns_cache_enabled())) {
 		if (!force && (im = tns_cache_load(file->path)))
-			cache_hit = 1;
+			cache_hit = true;
 	}
 
 	if (!cache_hit &&
@@ -241,7 +242,7 @@ int tns_load(tns_t *tns, int n, const fileinfo_t *file,
 	{
 		if (!silent)
 			warn("could not open image: %s", file->name);
-		return 0;
+		return false;
 	}
 
 	imlib_context_set_image(im);
@@ -270,13 +271,13 @@ int tns_load(tns_t *tns, int n, const fileinfo_t *file,
 	imlib_free_image_and_decache();
 
 	if (use_cache && !cache_hit)
-		tns_cache_write(t, False);
+		tns_cache_write(t, false);
 
-	tns->dirty = 1;
-	return 1;
+	tns->dirty = true;
+	return true;
 }
 
-void tns_check_view(tns_t *tns, Bool scrolled) {
+void tns_check_view(tns_t *tns, bool scrolled) {
 	int r;
 
 	if (!tns)
@@ -295,10 +296,10 @@ void tns_check_view(tns_t *tns, Bool scrolled) {
 		/* scroll to selection */
 		if (tns->first + tns->cols * tns->rows <= tns->sel) {
 			tns->first = tns->sel - r - tns->cols * (tns->rows - 1);
-			tns->dirty = 1;
+			tns->dirty = true;
 		} else if (tns->first > tns->sel) {
 			tns->first = tns->sel - r;
-			tns->dirty = 1;
+			tns->dirty = true;
 		}
 	}
 }
@@ -323,7 +324,7 @@ void tns_render(tns_t *tns, win_t *win) {
 		tns->first = 0;
 		cnt = tns->cnt;
 	} else {
-		tns_check_view(tns, False);
+		tns_check_view(tns, false);
 		cnt = tns->cols * tns->rows;
 		if ((r = tns->first + cnt - tns->cnt) >= tns->cols)
 			tns->first -= r - r % tns->cols;
@@ -342,7 +343,7 @@ void tns_render(tns_t *tns, win_t *win) {
 		imlib_context_set_image(t->im);
 
 		if (imlib_image_has_alpha() && !tns->alpha)
-			win_draw_rect(win, win->pm, t->x, t->y, t->w, t->h, True, 0, win->white);
+			win_draw_rect(win, win->pm, t->x, t->y, t->w, t->h, true, 0, win->white);
 
 		imlib_render_image_part_on_drawable_at_size(0, 0, t->w, t->h,
 		                                            t->x, t->y, t->w, t->h);
@@ -354,11 +355,11 @@ void tns_render(tns_t *tns, win_t *win) {
 		}
 	}
 
-	tns->dirty = 0;
-	tns_highlight(tns, win, tns->sel, True);
+	tns->dirty = false;
+	tns_highlight(tns, win, tns->sel, true);
 }
 
-void tns_highlight(tns_t *tns, win_t *win, int n, Bool hl) {
+void tns_highlight(tns_t *tns, win_t *win, int n, bool hl) {
 	thumb_t *t;
 	int x, y;
 	unsigned long col;
@@ -379,17 +380,17 @@ void tns_highlight(tns_t *tns, win_t *win, int n, Bool hl) {
 		x = t->x - (THUMB_SIZE - t->w) / 2;
 		y = t->y - (THUMB_SIZE - t->h) / 2;
 		win_draw_rect(win, win->pm, x - 3, y - 3, THUMB_SIZE + 6, THUMB_SIZE + 6,
-		              False, 2, col);
+		              false, 2, col);
 	}
 
 	win_draw(win);
 }
 
-int tns_move_selection(tns_t *tns, win_t *win, direction_t dir) {
+bool tns_move_selection(tns_t *tns, win_t *win, direction_t dir) {
 	int old;
 
 	if (!tns || !tns->thumbs || !win)
-		return 0;
+		return false;
 
 	old = tns->sel;
 
@@ -413,31 +414,31 @@ int tns_move_selection(tns_t *tns, win_t *win, direction_t dir) {
 	}
 
 	if (tns->sel != old) {
-		tns_highlight(tns, win, old, False);
-		tns_check_view(tns, False);
+		tns_highlight(tns, win, old, false);
+		tns_check_view(tns, false);
 		if (!tns->dirty)
-			tns_highlight(tns, win, tns->sel, True);
+			tns_highlight(tns, win, tns->sel, true);
 	}
 
 	return tns->sel != old;
 }
 
-int tns_scroll(tns_t *tns, direction_t dir) {
+bool tns_scroll(tns_t *tns, direction_t dir) {
 	int old;
 
 	if (!tns)
-		return 0;
+		return false;
 
 	old = tns->first;
 
 	if (dir == DIR_DOWN && tns->first + tns->cols * tns->rows < tns->cnt) {
 		tns->first += tns->cols;
-		tns_check_view(tns, True);
-		tns->dirty = 1;
+		tns_check_view(tns, true);
+		tns->dirty = true;
 	} else if (dir == DIR_UP && tns->first >= tns->cols) {
 		tns->first -= tns->cols;
-		tns_check_view(tns, True);
-		tns->dirty = 1;
+		tns_check_view(tns, true);
+		tns->dirty = true;
 	}
 
 	return tns->first != old;
diff --git a/thumbs.h b/thumbs.h
index 47f7ba8..92f5726 100644
--- a/thumbs.h
+++ b/thumbs.h
@@ -44,8 +44,8 @@ typedef struct {
 	int rows;
 	int first;
 	int sel;
-	unsigned char alpha;
-	unsigned char dirty;
+	bool alpha;
+	bool dirty;
 } tns_t;
 
 void tns_clean_cache(tns_t*);
@@ -53,13 +53,13 @@ void tns_clean_cache(tns_t*);
 void tns_init(tns_t*, int);
 void tns_free(tns_t*);
 
-int tns_load(tns_t*, int, const fileinfo_t*, Bool, Bool);
+bool tns_load(tns_t*, int, const fileinfo_t*, bool, bool);
 
 void tns_render(tns_t*, win_t*);
-void tns_highlight(tns_t*, win_t*, int, Bool);
+void tns_highlight(tns_t*, win_t*, int, bool);
 
-int tns_move_selection(tns_t*, win_t*, direction_t);
-int tns_scroll(tns_t*, direction_t);
+bool tns_move_selection(tns_t*, win_t*, direction_t);
+bool tns_scroll(tns_t*, direction_t);
 
 int tns_translate(tns_t*, int, int);
 
diff --git a/types.h b/types.h
index dd85922..ddf6cf6 100644
--- a/types.h
+++ b/types.h
@@ -2,6 +2,11 @@
 #define TYPES_H
 
 typedef enum {
+	false,
+	true
+} bool;
+
+typedef enum {
 	MODE_IMAGE,
 	MODE_THUMB
 } appmode_t;
@@ -29,7 +34,7 @@ typedef enum {
 typedef struct {
 	const char *name; /* as given by user */
 	const char *path; /* always absolute */
-	unsigned char loaded;
+	bool loaded;
 } fileinfo_t;
 
 /* timeouts in milliseconds: */
diff --git a/window.c b/window.c
index 4a90516..fd6229c 100644
--- a/window.c
+++ b/window.c
@@ -17,6 +17,7 @@
  */
 
 #define _POSIX_C_SOURCE 200112L
+#define _WINDOW_CONFIG
 
 #include <string.h>
 #include <X11/Xutil.h>
@@ -25,8 +26,6 @@
 #include "options.h"
 #include "util.h"
 #include "window.h"
-
-#define _WINDOW_CONFIG
 #include "config.h"
 
 static Cursor carrow;
@@ -76,7 +75,7 @@ void win_init(win_t *win) {
 
 	win->xwin = 0;
 	win->pm = 0;
-	win->fullscreen = 0;
+	win->fullscreen = false;
 }
 
 void win_set_sizehints(win_t *win) {
@@ -97,7 +96,7 @@ void win_open(win_t *win) {
 	win_env_t *e;
 	XClassHint classhint;
 	XColor col;
-	char none_data[] = {0, 0, 0, 0, 0, 0, 0, 0};
+	char none_data[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
 	Pixmap none;
 	int gmask;
 
@@ -158,7 +157,7 @@ void win_open(win_t *win) {
 	classhint.res_class = "sxiv";
 	XSetClassHint(e->dpy, win->xwin, &classhint);
 
-	if (options->fixed)
+	if (options->fixed_win)
 		win_set_sizehints(win);
 
 	XMapWindow(e->dpy, win->xwin);
@@ -186,11 +185,11 @@ void win_close(win_t *win) {
 	XCloseDisplay(win->env.dpy);
 }
 
-int win_configure(win_t *win, XConfigureEvent *c) {
-	int changed;
+bool win_configure(win_t *win, XConfigureEvent *c) {
+	bool changed;
 
 	if (!win)
-		return 0;
+		return false;
 	
 	changed = win->w != c->width || win->h != c->height;
 
@@ -203,9 +202,9 @@ int win_configure(win_t *win, XConfigureEvent *c) {
 	return changed;
 }
 
-int win_moveresize(win_t *win, int x, int y, unsigned int w, unsigned int h) {
+bool win_moveresize(win_t *win, int x, int y, unsigned int w, unsigned int h) {
 	if (!win || !win->xwin)
-		return 0;
+		return false;
 
 	x = MAX(0, x);
 	y = MAX(0, y);
@@ -213,19 +212,19 @@ int win_moveresize(win_t *win, int x, int y, unsigned int w, unsigned int h) {
 	h = MIN(h, win->env.scrh - 2 * win->bw);
 
 	if (win->x == x && win->y == y && win->w == w && win->h == h)
-		return 0;
+		return false;
 
 	win->x = x;
 	win->y = y;
 	win->w = w;
 	win->h = h;
 
-	if (options->fixed)
+	if (options->fixed_win)
 		win_set_sizehints(win);
 
 	XMoveResizeWindow(win->env.dpy, win->xwin, win->x, win->y, win->w, win->h);
 
-	return 1;
+	return true;
 }
 
 void win_toggle_fullscreen(win_t *win) {
@@ -235,7 +234,7 @@ void win_toggle_fullscreen(win_t *win) {
 	if (!win || !win->xwin)
 		return;
 
-	win->fullscreen ^= 1;
+	win->fullscreen = !win->fullscreen;
 
 	memset(&ev, 0, sizeof(ev));
 	ev.type = ClientMessage;
@@ -279,7 +278,7 @@ void win_draw(win_t *win) {
 }
 
 void win_draw_rect(win_t *win, Pixmap pm, int x, int y, int w, int h,
-		Bool fill, int lw, unsigned long col) {
+		bool fill, int lw, unsigned long col) {
 	XGCValues gcval;
 
 	if (!win || !pm)
diff --git a/window.h b/window.h
index 1058919..ac60156 100644
--- a/window.h
+++ b/window.h
@@ -46,9 +46,9 @@ typedef struct {
 	int y;
 	unsigned int w;
 	unsigned int h;
-
 	unsigned int bw;
-	unsigned char fullscreen;
+
+	bool fullscreen;
 } win_t;
 
 extern Atom wm_delete_win;
@@ -57,14 +57,14 @@ void win_init(win_t*);
 void win_open(win_t*);
 void win_close(win_t*);
 
-int win_configure(win_t*, XConfigureEvent*);
-int win_moveresize(win_t*, int, int, unsigned int, unsigned int);
+bool win_configure(win_t*, XConfigureEvent*);
+bool win_moveresize(win_t*, int, int, unsigned int, unsigned int);
 
 void win_toggle_fullscreen(win_t*);
 
 void win_clear(win_t*);
 void win_draw(win_t*);
-void win_draw_rect(win_t*, Pixmap, int, int, int, int, Bool, int,
+void win_draw_rect(win_t*, Pixmap, int, int, int, int, bool, int,
                    unsigned long);
 
 void win_set_title(win_t*, const char*);