add screen rotate support

frontend/ui/reader/readerfont.lua

@@ -30,6 +30,10 @@ function ReaderFont:init()
 	self.font_size = self.ui.document:getFontSize()
 end
 
+function ReaderFont:onSetDimensions(dimen)
+	self.dimen = dimen
+end
+
 function ReaderFont:onShowFontMenu()
 	-- build menu item_table
 	local face_list = cre.getFontFaces()

frontend/ui/reader/readermenu.lua

@@ -8,17 +8,46 @@ function ReaderMenu:onShowMenu()
 	local item_table = {}
 
 	table.insert(item_table, {
-		text = "Switch zoom mode",
+		text = "Screen rotate",
 		sub_item_table = {
 			{
-				text = "Zoom to fit content width",
+				text = "rotate 90 degree clockwise",
+				callback = function()
+					Screen:screenRotate("clockwise")
+					self.ui:handleEvent(Event:new("SetDimensions", Screen:getSize()))
+				end
 			},
 			{
-				text = "Zoom to fit content height",
+				text = "rotate 90 degree anticlockwise",
+				callback = function()
+					Screen:screenRotate("anticlockwise")
+					self.ui:handleEvent(Event:new("SetDimensions", Screen:getSize()))
+				end
 			},
 		}
 	})
 
+	if self.ui.document.info.has_pages then
+		table.insert(item_table, {
+			text = "Switch zoom mode",
+			sub_item_table = {
+				{
+					text = "Zoom to fit content width",
+				},
+				{
+					text = "Zoom to fit content height",
+				},
+			}
+		})
+	else
+		table.insert(item_table, {
+			text = "Font menu",
+			callback = function()
+				self.ui:handleEvent(Event:new("ShowFontMenu"))
+			end
+		})
+	end
+
 	table.insert(item_table, {
 		text = "Return to file browser"
 	})
@@ -30,6 +59,12 @@ function ReaderMenu:onShowMenu()
 		height = #item_table + 3 * 28
 	}
 
+	function main_menu:onMenuChoice(item)
+		if item.callback then
+			item.callback()
+		end
+	end
+
 	UIManager:show(main_menu)
 
 	return true

frontend/ui/reader/readertoc.lua

@@ -69,6 +69,10 @@ function ReaderToc:onShowToc()
 	UIManager:show(toc_menu)
 end
 
+function ReaderToc:onSetDimensions(dimen)
+	self.dimen = dimen
+end
+
 function ReaderToc:onPageUpdate(new_page_no)
 	self.current_page = new_page_no
 end

frontend/ui/reader/readerview.lua

@@ -59,21 +59,16 @@ function ReaderView:recalculate()
 		self.page_area = page_size
 
 		-- reset our size
-		self.visible_area:setSizeTo(self.ui.dimen)
+		self.visible_area:setSizeTo(self.dimen)
 		-- and recalculate it according to page size
 		self.visible_area:offsetWithin(self.page_area, 0, 0)
 	else
-		self.visible_area:setSizeTo(self.ui.dimen)
+		self.visible_area:setSizeTo(self.dimen)
 	end
 	-- flag a repaint
 	UIManager:setDirty(self.dialog)
 end
 
-function ReaderView:onSetDimensions(dimensions)
-	-- recalculate view
-	self:recalculate()
-end
-
 function ReaderView:PanningUpdate(dx, dy)
 	DEBUG("pan by", dx, dy)
 	local old = self.visible_area:copy()
@@ -87,6 +82,12 @@ function ReaderView:PanningUpdate(dx, dy)
 	return true
 end
 
+function ReaderView:onSetDimensions(dimensions)
+	self.dimen = dimensions
+	-- recalculate view
+	self:recalculate()
+end
+
 function ReaderView:onPageUpdate(new_page_no)
 	self.state.page = new_page_no
 	self:recalculate()

frontend/ui/readerui.lua

@@ -43,6 +43,7 @@ function ReaderUI:init()
 	-- a view container (so it must be child #1!)
 	self[1] = ReaderView:new{
 		dialog = self.dialog,
+		dimen = self.dimen,
 		ui = self
 	}
 	-- rotation controller
@@ -114,6 +115,10 @@ function ReaderUI:init()
 	self:handleEvent(Event:new("SetDimensions", self.dimen))
 end
 
+function ReaderUI:onSetDimensions(dimen)
+	self.dimen = dimen
+end
+
 function ReaderUI:onClose()
 	DEBUG("closing reader")
 	if self.document then

frontend/ui/screen.lua

@@ -66,6 +66,7 @@ function Screen:screenRotate(orien)
 	self.fb:setOrientation(self.cur_rotation_mode)
 	self.fb:close()
 	self.fb = einkfb.open("/dev/fb0")
+	Input.rotation = self.cur_rotation_mode
 end
 
 function Screen:getSize()