add: screen.lua

* move rotation mode to global variable, now check rotation
with Screen.cur_rotation_mode

* move screenRotate to screen module so other UIs can use it.

keys.lua

@@ -178,41 +178,6 @@ function set_emu_keycodes()
 	KEY_VMINUS = 96 -- F12
 end
 
---@TODO rotation does not fit in key module, we should move it 
--- to some other module in the future.  08.03 2012
-rotation_mode = {"Up","Right","Down","Left"}
-
-function getRotationMode()
-	--[[
-	return code for four kinds of rotation mode:
-
-	0 for no rotation, 
-	1 for landscape with bottom on the right side of screen, etc.
-
-	          2
-	   +--------------+
-	   | +----------+ |
-	   | |          | |
-	   | | Freedom! | |
-	   | |          | |  
-	   | |          | |  
-	 3 | |          | | 1
-	   | |          | |
-	   | |          | |
-	   | +----------+ |
-	   |              |
-	   |              |
-	   +--------------+
-	          0
-	--]]
-	if KEY_FW_DOWN == 116 then -- in EMU mode always return 0
-		return 0
-	end
-	orie_fd = assert(io.open("/sys/module/eink_fb_hal_broads/parameters/bs_orientation", "r"))
-	updown_fd = assert(io.open("/sys/module/eink_fb_hal_broads/parameters/bs_upside_down", "r"))
-	mode = orie_fd:read() + (updown_fd:read() * 2)
-	return mode
-end
 
 function adjustKeyEvents(ev)
 	if ev.type == EV_KEY and ev.value == EVENT_VALUE_KEY_PRESS then
@@ -231,9 +196,9 @@ function adjustKeyEvents(ev)
 
 	-- adjust five way key according to rotation mode
 	local code = ev.code
-	if getRotationMode() == 0 then
+	if Screen.cur_rotation_mode == 1 then
 		return code
-	elseif getRotationMode() == 1 then
+	elseif Screen.cur_rotation_mode == 2 then
 		if code == KEY_FW_UP then
 			return KEY_FW_RIGHT
 		elseif code == KEY_FW_RIGHT then
@@ -245,7 +210,7 @@ function adjustKeyEvents(ev)
 		else
 			return code
 		end
-	elseif getRotationMode() == 2 then
+	elseif Screen.cur_rotation_mode == 3 then
 		if code == KEY_FW_UP then
 			return KEY_FW_DOWN
 		elseif code == KEY_FW_RIGHT then
@@ -257,7 +222,7 @@ function adjustKeyEvents(ev)
 		else
 			return code
 		end
-	elseif getRotationMode() == 3 then
+	elseif Screen.cur_rotation_mode == 4 then
 		if code == KEY_FW_UP then
 			return KEY_FW_LEFT
 		elseif code == KEY_FW_RIGHT then

reader.lua

@@ -22,6 +22,7 @@ require "pdfreader"
 require "djvureader"
 require "filechooser"
 require "settings"
+require "screen"
 
 -- option parsing:
 longopts = {
@@ -111,6 +112,8 @@ end
 
 fb = einkfb.open("/dev/fb0")
 width, height = fb:getSize()
+-- read current rotation mode
+Screen:updateRotationMode()
 
 -- set up reader's setting: font
 reader_settings = DocSettings:open(".reader")

unireader.lua

@@ -528,18 +528,7 @@ end
 
 -- @ orien: 1 for clockwise rotate, -1 for anti-clockwise
 function UniReader:screenRotate(orien)
-	if orien == "clockwise" then
-		orien = 1
-	elseif orien == "anticlockwise" then
-		orien = -1
-	else
-		return
-	end
-
-	fb:close()
-	local mode = rotation_mode[(getRotationMode()+1*orien)%4 + 1]
-	os.execute("lipc-send-event -r 3 com.lab126.hal orientation"..mode)
-	fb = einkfb.open("/dev/fb0")
+	Screen:screenRotate(orien)
 	width, height = fb:getSize()
 
 	self:clearcache()