Slideshow mode is back, in a simplified version

Makefile

@@ -1,4 +1,4 @@
-VERSION = git-20140103
+VERSION = git-20140104
 
 PREFIX    = /usr/local
 MANPREFIX = $(PREFIX)/share/man

README.md

@@ -83,6 +83,7 @@ of small previews is displayed, making it easy to choose an image to open.
     -o           Write list of marked files to stdout when quitting
     -q           Be quiet, disable warnings
     -r           Search given directories recursively for images
+    -S DELAY     Enable slideshow and set slideshow delay to DELAY seconds
     -s           Scale all images to fit into window
     -t           Start in thumbnail mode
     -v           Print version information and exit
@@ -144,9 +145,12 @@ of small previews is displayed, making it easy to choose an image to open.
     ?            Rotate image by 180 degrees
     |,_          Flip image horizontally/vertically
 
+    s            Toggle slideshow or set delay to [count] seconds
+
     a            Toggle anti-aliasing
     W            Resize window to fit image
 
+
 **Mouse button mappings:**
 
 *Image mode:*

commands.c

@@ -38,6 +38,7 @@ void open_info(void);
 void redraw(void);
 void reset_cursor(void);
 void animate(void);
+void slideshow(void);
 void set_timeout(timeout_f, int, bool);
 void reset_timeout(timeout_f);
 
@@ -79,6 +80,10 @@ bool it_switch_mode(arg_t a)
 		}
 		img_close(&img, false);
 		reset_timeout(reset_cursor);
+		if (img.ss.on) {
+			img.ss.on = false;
+			reset_timeout(slideshow);
+		}
 		tns.sel = fileidx;
 		tns.dirty = true;
 		mode = MODE_THUMB;
@@ -475,20 +480,30 @@ bool i_flip(arg_t a)
 	}
 }
 
-bool i_toggle_antialias(arg_t a)
+bool i_slideshow(arg_t a)
 {
 	if (mode == MODE_IMAGE) {
-		img_toggle_antialias(&img);
+		if (prefix > 0) {
+			img.ss.on = true;
+			img.ss.delay = prefix;
+			set_timeout(slideshow, img.ss.delay * 1000, true);
+		} else if (img.ss.on) {
+			img.ss.on = false;
+			reset_timeout(slideshow);
+		} else {
+			img.ss.on = true;
+		}
 		return true;
 	} else {
 		return false;
 	}
 }
 
-bool i_change_gamma(arg_t a)
+bool i_toggle_antialias(arg_t a)
 {
 	if (mode == MODE_IMAGE) {
-		return img_change_gamma(&img, (long) a);
+		img_toggle_antialias(&img);
+		return true;
 	} else {
 		return false;
 	}
@@ -504,3 +519,12 @@ bool it_toggle_alpha(arg_t a)
 	return true;
 }
 
+bool i_change_gamma(arg_t a)
+{
+	if (mode == MODE_IMAGE) {
+		return img_change_gamma(&img, (long) a);
+	} else {
+		return false;
+	}
+}
+

commands.h

@@ -66,8 +66,9 @@ bool i_fit_to_win(arg_t);
 bool i_fit_to_img(arg_t);
 bool i_rotate(arg_t);
 bool i_flip(arg_t);
+bool i_slideshow(arg_t);
 bool i_toggle_antialias(arg_t);
-bool i_change_gamma(arg_t);
 bool it_toggle_alpha(arg_t);
+bool i_change_gamma(arg_t);
 
 #endif /* COMMANDS_H */

config.def.h

@@ -39,6 +39,9 @@ static const float zoom_levels[] = {
 	100.0, 150.0, 200.0, 400.0, 800.0
 };
 
+/* default slideshow delay (in sec, overwritten via -S option): */
+enum { SLIDESHOW_DELAY = 5 };
+
 /* default settings for multi-frame gif images: */
 enum {
 	GIF_DELAY    = 100, /* delay time (in ms) */
@@ -145,6 +148,8 @@ static const keymap_t keys[] = {
 	{ 0,            XK_bar,           i_flip,               (arg_t) FLIP_HORIZONTAL },
 	{ 0,            XK_underscore,    i_flip,               (arg_t) FLIP_VERTICAL },
 
+	{ 0,            XK_s,             i_slideshow,          (arg_t) None },
+
 	{ 0,            XK_a,             i_toggle_antialias,   (arg_t) None },
 	{ 0,            XK_A,             it_toggle_alpha,      (arg_t) None },
 

image.c

@@ -83,10 +83,13 @@ void img_init(img_t *img, win_t *win)
 	img->alpha = !RENDER_WHITE_ALPHA;
 	img->multi.cap = img->multi.cnt = 0;
 	img->multi.animate = false;
-	img->multi.repeat = 0;
+	img->multi.length = img->multi.repeat = 0;
 
 	img->cmod = imlib_create_color_modifier();
 	img->gamma = MIN(MAX(options->gamma, -GAMMA_RANGE), GAMMA_RANGE);
+	
+	img->ss.on = options->slideshow > 0;
+	img->ss.delay = options->slideshow > 0 ? options->slideshow : SLIDESHOW_DELAY;
 }
 
 void exif_auto_orientate(const fileinfo_t *file)
@@ -143,9 +146,8 @@ bool img_load_gif(img_t *img, const fileinfo_t *file)
 		img->multi.frames = (img_frame_t*)
 		                    s_malloc(sizeof(img_frame_t) * img->multi.cap);
 	}
-	img->multi.cnt = 0;
-	img->multi.sel = 0;
-	img->multi.repeat = 0;
+	img->multi.cnt = img->multi.sel = 0;
+	img->multi.length = img->multi.repeat = 0;
 
 #if defined(GIFLIB_MAJOR) && GIFLIB_MAJOR >= 5
 	gif = DGifOpenFileName(file->path, NULL);
@@ -275,6 +277,7 @@ bool img_load_gif(img_t *img, const fileinfo_t *file)
 			}
 			img->multi.frames[img->multi.cnt].im = im;
 			img->multi.frames[img->multi.cnt].delay = delay ? delay : GIF_DELAY;
+			img->multi.length += img->multi.frames[img->multi.cnt].delay;
 			img->multi.cnt++;
 		}
 	} while (rec != TERMINATE_RECORD_TYPE);

image.h

@@ -35,6 +35,7 @@ typedef struct {
 	int cnt;
 	int sel;
 	bool animate;
+	int length;
 	int repeat;
 } multi_img_t;
 
@@ -59,6 +60,11 @@ typedef struct {
 	Imlib_Color_Modifier cmod;
 	int gamma;
 
+	struct {
+		bool on;
+		int delay;
+	} ss;
+
 	multi_img_t multi;
 } img_t;
 

main.c

@@ -68,6 +68,7 @@ typedef struct {
 void redraw(void);
 void reset_cursor(void);
 void animate(void);
+void slideshow(void);
 void clear_resize(void);
 
 appmode_t mode;
@@ -96,9 +97,10 @@ struct {
 } info;
 
 timeout_t timeouts[] = {
-	{ { 0, 0 }, false, redraw },
+	{ { 0, 0 }, false, redraw       },
 	{ { 0, 0 }, false, reset_cursor },
-	{ { 0, 0 }, false, animate },
+	{ { 0, 0 }, false, animate      },
+	{ { 0, 0 }, false, slideshow    },
 	{ { 0, 0 }, false, clear_resize },
 };
 
@@ -304,6 +306,7 @@ void load_image(int new)
 		return;
 
 	win_set_cursor(&win, CURSOR_WATCH);
+	reset_timeout(slideshow);
 
 	if (new != fileidx)
 		alternate = fileidx;
@@ -363,6 +366,8 @@ void update_info(void)
 		}
 	} else {
 		n = snprintf(rt, rlen, "%s", mark);
+		if (img.ss.on)
+			n += snprintf(rt + n, rlen - n, "%ds | ", img.ss.delay);
 		if (img.gamma != 0)
 			n += snprintf(rt + n, rlen - n, "G%+d | ", img.gamma);
 		n += snprintf(rt + n, rlen - n, "%3d%% | ", (int) (img.zoom * 100.0));
@@ -389,10 +394,18 @@ void update_info(void)
 
 void redraw(void)
 {
-	if (mode == MODE_IMAGE)
+	int t;
+
+	if (mode == MODE_IMAGE) {
 		img_render(&img);
-	else
+		if (img.ss.on) {
+			t = img.ss.delay * 1000;
+			t = img.multi.animate ? MAX(t, img.multi.length) : t;
+			set_timeout(slideshow, t, false);
+		}
+	} else {
 		tns_render(&tns);
+	}
 	update_info();
 	win_draw(&win);
 	reset_timeout(redraw);
@@ -429,6 +442,12 @@ void animate(void)
 	}
 }
 
+void slideshow(void)
+{
+	load_image(fileidx + 1 < filecnt ? fileidx + 1 : 0);
+	redraw();
+}
+
 void clear_resize(void)
 {
 	resized = false;

options.c

@@ -34,7 +34,7 @@ const options_t *options = (const options_t*) &_options;
 void print_usage(void)
 {
 	printf("usage: sxiv [-bcdFfhioqrstvZ] [-G GAMMA] [-g GEOMETRY] [-n NUM] "
-	       "[-N name] [-z ZOOM] FILES...\n");
+	       "[-N NAME] [-S DELAY] [-z ZOOM] FILES...\n");
 }
 
 void print_version(void)
@@ -44,7 +44,7 @@ void print_version(void)
 
 void parse_options(int argc, char **argv)
 {
-	int opt, t, gamma;
+	int n, opt;
 	char *end;
 
 	_options.from_stdin = false;
@@ -55,6 +55,7 @@ void parse_options(int argc, char **argv)
 	_options.scalemode = SCALE_MODE;
 	_options.zoom = 1.0;
 	_options.gamma = 0;
+	_options.slideshow = 0;
 
 	_options.fixed_win = false;
 	_options.fullscreen = false;
@@ -66,7 +67,7 @@ void parse_options(int argc, char **argv)
 	_options.thumb_mode = false;
 	_options.clean_cache = false;
 
-	while ((opt = getopt(argc, argv, "bcdFfG:g:hin:N:oqrstvZz:")) != -1) {
+	while ((opt = getopt(argc, argv, "bcdFfG:g:hin:N:oqrS:stvZz:")) != -1) {
 		switch (opt) {
 			case '?':
 				print_usage();
@@ -87,13 +88,12 @@ void parse_options(int argc, char **argv)
 				_options.fullscreen = true;
 				break;
 			case 'G':
-				gamma = strtol(optarg, &end, 0);
+				n = strtol(optarg, &end, 0);
 				if (*end != '\0') {
-					fprintf(stderr, "sxiv: invalid argument for option -G: %s\n",
-					        optarg);
+					fprintf(stderr, "sxiv: invalid argument for option -G: %s\n", optarg);
 					exit(EXIT_FAILURE);
 				}
-				_options.gamma = gamma;
+				_options.gamma = n;
 				break;
 			case 'g':
 				_options.geometry = optarg;
@@ -105,13 +105,12 @@ void parse_options(int argc, char **argv)
 				_options.from_stdin = true;
 				break;
 			case 'n':
-				if (sscanf(optarg, "%d", &t) <= 0 || t < 1) {
-					fprintf(stderr, "sxiv: invalid argument for option -n: %s\n",
-					        optarg);
+				n = strtol(optarg, &end, 0);
+				if (*end != '\0' || n <= 0) {
+					fprintf(stderr, "sxiv: invalid argument for option -n: %s\n", optarg);
 					exit(EXIT_FAILURE);
-				} else {
-					_options.startnum = t - 1;
 				}
+				_options.startnum = n - 1;
 				break;
 			case 'N':
 				_options.res_name = optarg;
@@ -125,6 +124,14 @@ void parse_options(int argc, char **argv)
 			case 'r':
 				_options.recursive = true;
 				break;
+			case 'S':
+				n = strtol(optarg, &end, 0);
+				if (*end != '\0' || n <= 0) {
+					fprintf(stderr, "sxiv: invalid argument for option -S: %s\n", optarg);
+					exit(EXIT_FAILURE);
+				}
+				_options.slideshow = n;
+				break;
 			case 's':
 				_options.scalemode = SCALE_FIT;
 				break;
@@ -139,13 +146,13 @@ void parse_options(int argc, char **argv)
 				_options.zoom = 1.0;
 				break;
 			case 'z':
-				_options.scalemode = SCALE_ZOOM;
-				if (sscanf(optarg, "%d", &t) <= 0 || t <= 0) {
-					fprintf(stderr, "sxiv: invalid argument for option -z: %s\n",
-					        optarg);
+				n = strtol(optarg, &end, 0);
+				if (*end != '\n' || n <= 0) {
+					fprintf(stderr, "sxiv: invalid argument for option -z: %s\n", optarg);
 					exit(EXIT_FAILURE);
 				}
-				_options.zoom = (float) t / 100.0;
+				_options.scalemode = SCALE_ZOOM;
+				_options.zoom = (float) n / 100.0;
 				break;
 		}
 	}

options.h

@@ -35,6 +35,7 @@ typedef struct {
 	scalemode_t scalemode;
 	float zoom;
 	int gamma;
+	int slideshow;
 
 	/* window: */
 	bool fixed_win;

sxiv.1

@@ -12,6 +12,8 @@ sxiv \- Simple X Image Viewer
 .IR NAME ]
 .RB [ \-n
 .IR NUM ]
+.RB [ \-S
+.IR DELAY ]
 .RB [ \-z
 .IR ZOOM ]
 .IR FILE ...
@@ -78,6 +80,9 @@ Be quiet, disable warnings to standard error stream.
 .B \-r
 Search the given directories recursively for images to view.
 .TP
+.BI "\-S " DELAY
+Start in slideshow mode. Set the delay between images to DELAY seconds.
+.TP
 .B \-s
 Scale all images to fit into window.
 .TP
@@ -302,6 +307,11 @@ Increase gamma.
 Reset gamma.
 .SS Miscellaneous
 .TP
+.B s
+Toggle slideshow mode and/or set the delay between images to
+.I count
+seconds.
+.TP
 .B a
 Toggle anti-aliasing.
 .TP