Revamp manual rotation events (#6530)

Restore a Swap event like before #6309
Implement an Invert one
And keep the fairly useless +90° CW one, but under an accurate name.

Fix #6524

frontend/device/devicelistener.lua

@@ -239,8 +239,32 @@ if Device:canToggleGSensor() then
     end
 end
 
-function DeviceListener:onToggleRotation()
-    local arg = bit.band((Screen:getRotationMode() + 1), 3)
+function DeviceListener:onIterateRotation()
+    -- Simply rotate by 90° CW
+    local arg = bit.band(Screen:getRotationMode() + 1, 3)
+    self.ui:handleEvent(Event:new("SetRotationMode", arg))
+    return true
+end
+
+function DeviceListener:onInvertRotation()
+    -- Invert is always rota + 2, w/ wraparound
+    local arg = bit.band(Screen:getRotationMode() + 2, 3)
+    self.ui:handleEvent(Event:new("SetRotationMode", arg))
+    return true
+end
+
+function DeviceListener:onSwapRotation()
+    local rota = Screen:getRotationMode()
+    -- Portrait is always even, Landscape is always odd. For each of 'em, Landscape = Portrait + 1.
+    -- As such...
+    local arg
+    if bit.band(rota, 1) == 0 then
+        -- If Portrait, Landscape is +1
+        arg = bit.band(rota + 1, 3)
+    else
+        -- If Landscape, Portrait is -1
+        arg = bit.band(rota - 1, 3)
+    end
     self.ui:handleEvent(Event:new("SetRotationMode", arg))
     return true
 end

frontend/dispatcher.lua

@@ -62,8 +62,10 @@ local settingsList = {
     reboot = { category="none", event="Reboot", title=_("Reboot the device"), device=true, condition=Device:canReboot(),},
     poweroff = { category="none", event="PowerOff", title=_("Power off"), device=true, condition=Device:canPowerOff(), separator=true,},
     show_menu = { category="none", event="ShowMenu", title=_("Show menu"), device=true,},
-    toggle_hold_corners = { category="none", event="IgnoreHoldCorners", title=_("Toggle hold corners"), device=true,},
-    toggle_rotation = { category="none", event="ToggleRotation", title=_("Toggle rotation"), device=true, separator=true,},
+    toggle_hold_corners = { category="none", event="IgnoreHoldCorners", title=_("Toggle hold corners"), device=true, separator=true,},
+    toggle_rotation = { category="none", event="SwapRotation", title=_("Toggle orientation"), device=true,},
+    invert_rotation = { category="none", event="InvertRotation", title=_("Invert rotation"), device=true,},
+    iterate_rotation = { category="none", event="IterateRotation", title=_("Rotate by 90° CW"), device=true, separator=true,},
     wallabag_download = { category="none", event="SynchronizeWallabag", title=_("Wallabag retrieval"), device=true,},
     calibre_search = { category="none", event="CalibreSearch", title=_("Search in calibre metadata"), device=true,},
     calibre_browse_tags = { category="none", event="CalibreBrowseTags", title=_("Browse all calibre tags"), device=true,},
@@ -177,6 +179,8 @@ local dispatcher_menu_order = {
     "toggle_hold_corners",
     "toggle_gsensor",
     "toggle_rotation",
+    "invert_rotation",
+    "iterate_rotation",
 
     "wifi_on",
     "wifi_off",