add two finger swipe gestures for showing TOC and bookmarks

two_finger_swipe to east is for TOC
two_finger_swipe to west is for bookmarks

frontend/ui/gesturerange.lua

@@ -39,6 +39,11 @@ function GestureRange:match(gs)
 			return false
 		end
 	end
+	if self.direction then
+		if self.direction ~= gs.direction then
+			return false
+		end
+	end
 	return true
 end
 

frontend/ui/reader/readerbookmark.lua

@@ -18,11 +18,26 @@ local ReaderBookmark = InputContainer:new{
 function ReaderBookmark:init()
 	if Device:hasKeyboard() then
 		self.key_events = {
-			ShowToc = {
+			ShowBookmark = {
 				{ "B" },
 				doc = _("show bookmarks") },
 		}
 	end
+	if Device:isTouchDevice() then
+		self.ges_events = {
+			ShowBookmark = {
+				GestureRange:new{
+					ges = "two_finger_swipe",
+					range = Geom:new{
+						x = 0, y = 0,
+						w = Screen:getWidth(),
+						h = Screen:getHeight(),
+					},
+					direction = "west"
+				}
+			},
+		}
+	end
 	self.ui.menu:registerToMainMenu(self)
 end
 

frontend/ui/reader/readertoc.lua

@@ -1,6 +1,8 @@
 local InputContainer = require("ui/widget/container/inputcontainer")
 local CenterContainer = require("ui/widget/container/centercontainer")
+local GestureRange = require("ui/gesturerange")
 local Menu = require("ui/widget/menu")
+local Geom = require("ui/geometry")
 local Screen = require("ui/screen")
 local Device = require("ui/device")
 local UIManager = require("ui/uimanager")
@@ -20,6 +22,21 @@ function ReaderToc:init()
 				doc = _("show Table of Content menu") },
 		}
 	end
+	if Device:isTouchDevice() then
+		self.ges_events = {
+			ShowToc = {
+				GestureRange:new{
+					ges = "two_finger_swipe",
+					range = Geom:new{
+						x = 0, y = 0,
+						w = Screen:getWidth(),
+						h = Screen:getHeight(),
+					},
+					direction = "east"
+				}
+			},
+		}
+	end
 	self.ui.menu:registerToMainMenu(self)
 end