kindle: allow stopping the framework on 5.X

this reclaims a bunch of memory useful on low memory devices

frontend/device/kindle/device.lua

@@ -121,6 +121,26 @@ local function hasSpecialOffers()
     end
 end
 
+local function frameworkStopped()
+    if os.getenv("STOP_FRAMEWORK") == "yes" then
+        local haslipc, lipc = pcall(require, "liblipclua")
+        if not (haslipc and lipc) then
+            logger.warn("could not load liblibclua")
+            return
+        end
+        local lipc_handle = lipc.init("com.lab126.kaf")
+        if not lipc_handle then
+            logger.warn("could not get lipc handle")
+            return
+        end
+        local frameworkStarted = lipc_handle:register_int_property("frameworkStarted", "r")
+        frameworkStarted.value = 1
+        lipc_handle:set_string_property("com.lab126.blanket", "unload", "splash")
+        lipc_handle:set_string_property("com.lab126.blanket", "unload", "screensaver")
+        return lipc_handle
+    end
+end
+
 local Kindle = Generic:new{
     model = "Kindle",
     isKindle = yes,
@@ -150,6 +170,7 @@ local Kindle = Generic:new{
     canHWDither = no,
     -- The time the device went into suspend
     suspend_time = 0,
+    framework_lipc_handle = frameworkStopped()
 }
 
 function Kindle:initNetworkManager(NetworkMgr)
@@ -997,6 +1018,10 @@ function KindleTouch:exit()
         self.screen:_MTK_ToggleFastMode(false)
     end
 
+    if self.framework_lipc_handle then
+        self.framework_lipc_handle:close()
+    end
+
     Generic.exit(self)
 
     if self.isSpecialOffers then

platform/kindle/extensions/koreader/menu.json

@@ -25,7 +25,6 @@
 		},
 		{
 			"name": "Start KOReader (no framework)",
-			"if": "\"Kindle2\" -m \"KindleDX\" -m \"KindleDXG\" -m \"Kindle3\" -m \"Kindle4\" -m || || || ||",
 			"priority": 4,
 			"action": "/mnt/us/koreader/koreader.sh",
 			"params": "--kual --framework_stop",

platform/kindle/koreader.sh

@@ -56,6 +56,7 @@ if [ "${INIT_TYPE}" = "upstart" ]; then
 fi
 
 # Keep track of what we do with pillow...
+export STOP_FRAMEWORK="no"
 export AWESOME_STOPPED="no"
 export CVM_STOPPED="no"
 export VOLUMD_STOPPED="no"
@@ -87,12 +88,10 @@ elif [ "${1}" = "--asap" ]; then
     # Start as soon as possible, without sleeping to workaround UI quirks
     shift 1
     NO_SLEEP="yes"
-    STOP_FRAMEWORK="no"
     REEXEC_FLAGS="${REEXEC_FLAGS} --asap"
     # Don't sleep during eips calls either...
     export EIPS_NO_SLEEP="true"
 else
-    STOP_FRAMEWORK="no"
     NO_SLEEP="no"
 fi