Added screen-wise scrolling for thumbnail mode

Makefile

@@ -1,4 +1,4 @@
-VERSION = git-20111017
+VERSION = git-20111027
 
 CC      = gcc
 CFLAGS  = -ansi -Wall -pedantic -O2

README.md

@@ -102,6 +102,7 @@ The following general key commands are available:
 The following additional key commands are available in *thumbnail mode*:
 
     h,j,k,l      Move selection left/down/up/right
+    Ctrl-j,k     Scroll thumbnail grid one window height down/up
 
 The following additional key commands are available in *image mode*:
 

commands.c

@@ -188,7 +188,7 @@ bool i_toggle_animation(arg_t a) {
 	return true;
 }
 
-bool it_move(arg_t a) {
+bool it_scroll_move(arg_t a) {
 	direction_t dir = (direction_t) a;
 
 	if (mode == MODE_IMAGE)
@@ -197,16 +197,16 @@ bool it_move(arg_t a) {
 		return tns_move_selection(&tns, dir);
 }
 
-bool i_pan_screen(arg_t a) {
+bool it_scroll_screen(arg_t a) {
 	direction_t dir = (direction_t) a;
 
 	if (mode == MODE_IMAGE)
 		return img_pan(&img, dir, -1);
 	else
-		return false;
+		return tns_scroll(&tns, dir, true);
 }
 
-bool i_pan_edge(arg_t a) {
+bool i_scroll_to_edge(arg_t a) {
 	direction_t dir = (direction_t) a;
 
 	if (mode == MODE_IMAGE)

commands.h

@@ -51,9 +51,9 @@ bool it_first(arg_t);
 bool it_n_or_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 it_scroll_move(arg_t);
+bool it_scroll_screen(arg_t);
+bool i_scroll_to_edge(arg_t);
 bool i_drag(arg_t);
 bool i_zoom(arg_t);
 bool i_set_zoom(arg_t);

config.def.h

@@ -85,28 +85,28 @@ static const keymap_t keys[] = {
 	{ 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_h,             it_scroll_move,       (arg_t) DIR_LEFT },
+	{ false,  XK_Left,          it_scroll_move,       (arg_t) DIR_LEFT },
+	{ false,  XK_j,             it_scroll_move,       (arg_t) DIR_DOWN },
+	{ false,  XK_Down,          it_scroll_move,       (arg_t) DIR_DOWN },
+	{ false,  XK_k,             it_scroll_move,       (arg_t) DIR_UP },
+	{ false,  XK_Up,            it_scroll_move,       (arg_t) DIR_UP },
+	{ false,  XK_l,             it_scroll_move,       (arg_t) DIR_RIGHT },
+	{ false,  XK_Right,         it_scroll_move,       (arg_t) DIR_RIGHT },
+
+	{ true,   XK_h,             it_scroll_screen,     (arg_t) DIR_LEFT },
+	{ true,   XK_Left,          it_scroll_screen,     (arg_t) DIR_LEFT },
+	{ true,   XK_j,             it_scroll_screen,     (arg_t) DIR_DOWN },
+	{ true,   XK_Down,          it_scroll_screen,     (arg_t) DIR_DOWN },
+	{ true,   XK_k,             it_scroll_screen,     (arg_t) DIR_UP },
+	{ true,   XK_Up,            it_scroll_screen,     (arg_t) DIR_UP },
+	{ true,   XK_l,             it_scroll_screen,     (arg_t) DIR_RIGHT },
+	{ true,   XK_Right,         it_scroll_screen,     (arg_t) DIR_RIGHT },
+
+	{ false,  XK_H,             i_scroll_to_edge,     (arg_t) DIR_LEFT },
+	{ false,  XK_J,             i_scroll_to_edge,     (arg_t) DIR_DOWN },
+	{ false,  XK_K,             i_scroll_to_edge,     (arg_t) DIR_UP },
+	{ false,  XK_L,             i_scroll_to_edge,     (arg_t) DIR_RIGHT },
 
 	{ false,  XK_plus,          i_zoom,               (arg_t) +1 },
 	{ false,  XK_KP_Add,        i_zoom,               (arg_t) +1 },
@@ -147,10 +147,10 @@ static const button_t buttons[] = {
 	{ 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 },
+	{ false,  false,  Button4,  it_scroll_move,       (arg_t) DIR_UP },
+	{ false,  false,  Button5,  it_scroll_move,       (arg_t) DIR_DOWN },
+	{ false,  true,   Button4,  it_scroll_move,       (arg_t) DIR_LEFT },
+	{ false,  true,   Button5,  it_scroll_move,       (arg_t) DIR_RIGHT },
 	{ true,   false,  Button4,  i_zoom,               (arg_t) +1 },
 	{ true,   false,  Button5,  i_zoom,               (arg_t) -1 },
 };

main.c

@@ -394,7 +394,8 @@ void on_buttonpress(XButtonEvent *bev) {
 				break;
 			case Button4:
 			case Button5:
-				if (tns_scroll(&tns, bev->button == Button4 ? DIR_UP : DIR_DOWN))
+				if (tns_scroll(&tns, bev->button == Button4 ? DIR_UP : DIR_DOWN,
+				               (bev->state & ControlMask) != 0))
 					redraw();
 				break;
 		}

sxiv.1

@@ -127,6 +127,12 @@ Move selection up.
 .TP
 .BR l ", " Right
 Move selection right.
+.TP
+.BR Ctrl-j ", " Ctrl-Down
+Scroll thumbnail grid one window height down.
+.TP
+.BR Ctrl-k ", " Ctrl-Up
+Scroll thumbnail grid one window height up.
 .SH IMAGE KEYBOARD COMMANDS
 The following keyboard commands are only available in image mode:
 .SS Navigate image list

thumbs.c

@@ -430,20 +430,25 @@ bool tns_move_selection(tns_t *tns, direction_t dir) {
 	return tns->sel != old;
 }
 
-bool tns_scroll(tns_t *tns, direction_t dir) {
-	int old;
+bool tns_scroll(tns_t *tns, direction_t dir, bool screen) {
+	int d, max, old;
 
 	if (tns == NULL)
 		return false;
 
 	old = tns->first;
+	d = tns->cols * (screen ? tns->rows : 1);
+
+	if (dir == DIR_DOWN) {
+		max = tns->cnt - tns->cols * tns->rows;
+		if (tns->cnt % tns->cols != 0)
+			max += tns->cols - tns->cnt % tns->cols;
+		tns->first = MIN(tns->first + d, max);
+	} else if (dir == DIR_UP) {
+		tns->first = MAX(tns->first - d, 0);
+	}
 
-	if (dir == DIR_DOWN && tns->first + tns->cols * tns->rows < tns->cnt) {
-		tns->first += tns->cols;
-		tns_check_view(tns, true);
-		tns->dirty = true;
-	} else if (dir == DIR_UP && tns->first >= tns->cols) {
-		tns->first -= tns->cols;
+	if (tns->first != old) {
 		tns_check_view(tns, true);
 		tns->dirty = true;
 	}

thumbs.h

@@ -62,7 +62,7 @@ void tns_render(tns_t*);
 void tns_highlight(tns_t*, int, bool);
 
 bool tns_move_selection(tns_t*, direction_t);
-bool tns_scroll(tns_t*, direction_t);
+bool tns_scroll(tns_t*, direction_t, bool);
 
 int tns_translate(tns_t*, int, int);