Added command to remove all image marks, bound to Ctrl-m; fixes issue #163

README.md

@@ -103,6 +103,7 @@ of small previews is displayed, making it easy to choose an image to open.
     Ctrl-h,j,k,l Scroll one window width/height left/down/up/right
     m            Mark/unmark current image
     M            Reverse all image marks
+    Ctrl-m       Remove all image marks
     N            Go [count] marked images forward
     P            Go [count] marked images backward
 

commands.c

@@ -215,6 +215,18 @@ bool cg_reverse_marks(arg_t a)
 	return true;
 }
 
+bool cg_unmark_all(arg_t a)
+{
+	int i;
+
+	for (i = 0; i < filecnt; i++)
+		files[i].marked = false;
+	markcnt = 0;
+	if (mode == MODE_THUMB)
+		tns.dirty = true;
+	return true;
+}
+
 bool cg_navigate_marked(arg_t a)
 {
 	long n = (long) a;

commands.lst

@@ -10,6 +10,7 @@ G_CMD(n_or_last)
 G_CMD(scroll_screen)
 G_CMD(toggle_image_mark)
 G_CMD(reverse_marks)
+G_CMD(unmark_all)
 G_CMD(navigate_marked)
 
 I_CMD(navigate)

config.def.h

@@ -81,6 +81,7 @@ static const keymap_t keys[] = {
 	{ ControlMask,  XK_Right,         g_scroll_screen,      (arg_t) DIR_RIGHT },
 	{ 0,            XK_m,             g_toggle_image_mark,  (arg_t) None },
 	{ 0,            XK_M,             g_reverse_marks,      (arg_t) None },
+	{ ControlMask,  XK_m,             g_unmark_all,         (arg_t) None },
 	{ 0,            XK_N,             g_navigate_marked,    (arg_t) +1 },
 	{ 0,            XK_P,             g_navigate_marked,    (arg_t) -1 },
 

sxiv.1

@@ -146,6 +146,9 @@ Mark/unmark the current image.
 .B M
 Reverse all image marks.
 .TP
+.B Ctrl-m
+Remove all image marks.
+.TP
 .B N
 Go
 .I count