Add option to reverse scroll direction

FireFox does mouse wheel tab scrolling in the opposite direction, so if you use
both Chrome and FireFox, you will have hard time remembering which way to
scroll. Using this option you can make Chrome's tabs scroll in the same
direction as FireFox tabs do.

chrome-mouse-wheel-tab-scroller.au3

@@ -29,7 +29,7 @@
 #AutoIt3Wrapper_Res_Icon_Add=icon_disabled.ico
 #AutoIt3Wrapper_Res_Comment=Scroll Chrome tabs using mouse wheel
 #AutoIt3Wrapper_Res_Description=Scroll Chrome tabs using mouse wheel
-#AutoIt3Wrapper_Res_Fileversion=0.1.0.0
+#AutoIt3Wrapper_Res_Fileversion=0.2.0.0
 #AutoIt3Wrapper_Res_LegalCopyright=Maxim Biro
 
 #include "MouseOnEvent.au3"
@@ -39,24 +39,48 @@ Const $CHROME_TABS_AREA_HEIGHT_NOT_MAXIMIZED = 48
 Const $CHROME_NONTABS_AREA_RIGHT_WIDTH_OFFSET_MAXIMIZED = 200
 Const $CHROME_NONTABS_AREA_RIGHT_WIDTH_OFFSET_NOT_MAXIMIZED = 150
 
-Dim Const $HOOKS[2][2] = [ _
-                            [$MOUSE_WHEELSCROLLUP_EVENT, "mouseWheelUp"], _
-                            [$MOUSE_WHEELSCROLLDOWN_EVENT, "mouseWheelDown"] _
-                         ]
+Const $CFG_DIR_PATH = @AppDataDir & "\chrome-mouse-wheel-tab-scroller"
+Const $CFG_FILE_PATH = $CFG_DIR_PATH & "\config.ini"
+$CFG_REVERSE = False
 
-registerHooks()
+Dim $HOOKS[2][2] = [ _
+                      [$MOUSE_WHEELSCROLLUP_EVENT, "mouseWheelUp"], _
+                      [$MOUSE_WHEELSCROLLDOWN_EVENT, "mouseWheelDown"] _
+                   ]
 
 Opt("TrayMenuMode", 1)
+$trayReverse = TrayCreateItem("Reverse scroll direction")
 $trayDisable = TrayCreateItem("Disable (Gaming Mode)")
 $trayExit = TrayCreateItem("Exit")
 TraySetClick(16)
 TraySetState()
 
+readConfig()
+
+If $CFG_REVERSE Then
+    TrayItemSetState($trayReverse, $TRAY_CHECKED)
+    swapHooks()
+EndIf
+
+registerHooks()
+
 While 1
     $msg = TrayGetMsg()
     Select
         Case $msg = $trayExit
             Exit
+        Case $msg = $trayReverse
+            $CFG_REVERSE = Not $CFG_REVERSE
+            writeConfig()
+
+            $trayDisableState = TrayItemGetState($trayDisable)
+            If BitAnd($trayDisableState, $TRAY_UNCHECKED) Then
+                unregisterHooks()
+            EndIf
+            swapHooks()
+            If BitAnd($trayDisableState, $TRAY_UNCHECKED) Then
+                registerHooks()
+            EndIf
         Case $msg = $trayDisable
             $trayDisableState = TrayItemGetState($trayDisable)
             Select
@@ -84,6 +108,12 @@ Func unregisterHooks()
     Next
 EndFunc
 
+Func swapHooks()
+    $tmp = $HOOKS[0][0]
+    $HOOKS[0][0] = $HOOKS[1][0]
+    $HOOKS[1][0] = $tmp
+EndFunc
+
 Func isMouseInChromeTabsArea()
     $windowList = WinList("[REGEXPCLASS:Chrome_WidgetWin_]")
     For $i = 1 To $windowList[0][0]
@@ -120,3 +150,13 @@ Func mouseWheelDown()
         Send("^{PGDN}")
     EndIf
 EndFunc
+
+Func readConfig()
+    $CFG_REVERSE = IniRead($CFG_FILE_PATH, "options", "reverse", "False") == "True"
+EndFunc
+
+Func writeConfig()
+    DirCreate($CFG_DIR_PATH)
+
+    IniWrite($CFG_FILE_PATH, "options", "reverse", String($CFG_REVERSE))
+EndFunc