vis: fast-jump: up uses unused down keys and down uses unused up keys

vis/.config/vis/fast-jump.lua

@@ -10,7 +10,7 @@ local function search(p)
 	return Ct(((1 - p)^0 * Cp() * p)^0)
 end
 
-local up = {
+local up_keys = {
  'a', 's', 'd', 'f' ,
  'q', 'w', 'e', 'r', 't', 'g',
  'z', 'x', 'c', 'v', 'b',
@@ -22,7 +22,7 @@ local up = {
  '`', '~',
 }
 
-local down = {
+local down_keys = {
  'j', 'k', 'l', ';',
  'y', 'u', 'i', 'o', 'p',
  'n', 'm', ',', '.', '/',
@@ -34,6 +34,22 @@ local down = {
  "'", '"', '\\', '|',
 }
 
+local function merge(a, b)
+	local c = {}
+	for i = 1, #a do
+		c[i] = a[i]
+	end
+	for i = 1, #b do
+		c[#a + i] = b[i]
+	end
+	return c
+end
+
+local mu = #up_keys
+local md = #down_keys
+local up = merge(up_keys, down_keys)
+local down = merge(down_keys, up_keys)
+
 local jumps = {}
 
 local function jump(keys)
@@ -78,8 +94,13 @@ local function jump(keys)
 			break
 		end
 	end
+	local nu = prev
+	local nd = #lst - next
 	local j = 1
 	for i = prev, 1, -1 do
+		if j == mu + 1 then
+			j = j + nd
+		end
 		if not up[j] then
 			break
 		end
@@ -89,6 +110,9 @@ local function jump(keys)
 	end
 	j = 1
 	for i = next, #lst do
+		if j == md + 1 then
+			j = j + nu
+		end
 		if not down[j] then
 			break
 		end