Implement ';' and ','

This fixes martanne#45

README.md

@@ -352,6 +352,8 @@ and their current support in vis.
     t{char}  (till before next occurrence of char to the right)
     F{char}  (to next occurrence of char to the left)
     T{char}  (till before next occurrence of char to the left)
+    ;        (repeat last to/till movement)
+    ,        (repeat last to/till movement but in opposite direction)
     /{text}  (to next match of text in forward direction)
     ?{text}  (to next match of text in backward direction)
 

config.def.h

@@ -142,6 +142,8 @@ static KeyBinding vis_movements[] = {
 	{ { NONE('F')               }, movement_key, { .i = MOVE_LEFT_TO             } },
 	{ { NONE('t')               }, movement_key, { .i = MOVE_RIGHT_TILL          } },
 	{ { NONE('T')               }, movement_key, { .i = MOVE_LEFT_TILL           } },
+	{ { NONE(';')               }, totill_repeat, { NULL                         } },
+	{ { NONE(',')               }, totill_reverse,{ NULL                         } },
 	{ { NONE('/')               }, prompt_search,{ .s = "/"                      } },
 	{ { NONE('?')               }, prompt_search,{ .s = "?"                      } },
 	{ /* empty last element, array terminator */                                   },

editor.h

@@ -230,6 +230,7 @@ struct Editor {
 	char prompt_type;                 /* command ':' or search '/','?' prompt */
 	Regex *search_pattern;            /* last used search pattern */
 	char search_char[8];              /* last used character to search for via 'f', 'F', 't', 'T' */
+	int last_totill;                  /* last to/till movement used for ';' and ',' */
 	int tabwidth;                     /* how many spaces should be used to display a tab */
 	bool expandtab;                   /* whether typed tabs should be converted to spaces */
 	bool autoindent;                  /* whether indentation should be copied from previous line on newline */

vis.c

@@ -303,6 +303,10 @@ static void join(const Arg *arg);
 static void cmd(const Arg *arg);
 /* perform last action i.e. action_prev again */
 static void repeat(const Arg *arg);
+/* repeat last to/till movement */
+static void totill_repeat(const Arg *arg);
+/* repeat last to/till movement but in opposite direction */
+static void totill_reverse(const Arg *arg);
 /* replace character at cursor with one read form keyboard */
 static void replace(const Arg *arg);
 /* adjust action.count by arg->i */
@@ -774,6 +778,33 @@ static void repeat(const Arg *arg) {
 	action_do(&vis->action);
 }
 
+static void totill_repeat(const Arg *arg) {
+	if (!vis->last_totill)
+		return;
+	movement(&(const Arg){ .i = vis->last_totill });
+}
+
+static void totill_reverse(const Arg *arg) {
+	int type = vis->last_totill;
+	switch (type) {
+	case MOVE_RIGHT_TO:
+		type = MOVE_LEFT_TO;
+		break;
+	case MOVE_LEFT_TO:
+		type = MOVE_RIGHT_TO;
+		break;
+	case MOVE_RIGHT_TILL:
+		type = MOVE_LEFT_TILL;
+		break;
+	case MOVE_LEFT_TILL:
+		type = MOVE_RIGHT_TILL;
+		break;
+	default:
+		return;
+	}
+	movement(&(const Arg){ .i = type });
+}
+
 static void replace(const Arg *arg) {
 	Key k = getkey();
 	if (!k.str[0])
@@ -843,6 +874,7 @@ static void movement_key(const Arg *arg) {
 		return;
 	}
 	strncpy(vis->search_char, k.str, sizeof(vis->search_char));
+	vis->last_totill = arg->i;
 	vis->action.movement = &moves[arg->i];
 	action_do(&vis->action);
 }