disable hinting temporarily in config dialog and flipping mode and cropping dialog

Since hinting is of little use in these situations.

frontend/ui/reader/readerconfig.lua

@@ -82,8 +82,11 @@ function ReaderConfig:onShowConfigMenu()
 		ui = self.ui,
 		configurable = self.configurable,
 		config_options = self.options,
+		close_callback = function() 
+			self.ui:handleEvent(Event:new("RestoreHinting"))
+		end,
 	}
-
+	self.ui:handleEvent(Event:new("DisableHinting"))
 	UIManager:show(self.config_dialog)
 
 	return true

frontend/ui/reader/readercropping.lua

@@ -63,6 +63,8 @@ function ReaderCropping:onPageCrop(mode)
 	-- backup original page scroll
 	self.orig_page_scroll = self.view.page_scroll
 	self.view.page_scroll = false
+	-- backup and disable original hinting state 
+	self.ui:handleEvent(Event:new("DisableHinting"))
 	-- backup original reflow mode as cropping use non-reflow mode
 	self.orig_reflow_mode = self.document.configurable.text_wrap
 	if self.orig_reflow_mode == 1 then
@@ -110,6 +112,8 @@ function ReaderCropping:onCancelPageCrop()
 end
 
 function ReaderCropping:exitPageCrop(confirmed)
+	-- restore hinting state
+	self.ui:handleEvent(Event:new("RestoreHinting"))
 	-- restore page scroll
 	self.view.page_scroll = self.orig_page_scroll
 	-- restore view bgcolor

frontend/ui/reader/readerhinting.lua

@@ -0,0 +1,19 @@
+
+ReaderHinting = EventListener:new{
+	hinting_states = {}
+}
+
+function ReaderHinting:onSetHinting(hinting)
+	self.view.hinting = hinting
+end
+
+function ReaderHinting:onDisableHinting()
+	table.insert(self.hinting_states, self.view.hinting)
+	self.view.hinting = false
+	return true
+end
+
+function ReaderHinting:onRestoreHinting()
+	self.view.hinting = table.remove(self.hinting_states)
+	return true
+end

frontend/ui/reader/readerpaging.lua

@@ -143,6 +143,7 @@ function ReaderPaging:onToggleFlipping()
 	if self.flipping_mode then
 		self:updateOriginalPage(self.current_page)
 	end
+	self.ui:handleEvent(Event:new("SetHinting", not self.flipping_mode))
 	UIManager:setDirty(self.view.dialog, "partial")
 end
 

frontend/ui/reader/readerview.lua

@@ -31,7 +31,8 @@ ReaderView = OverlapGroup:new{
 	render_mode = 0, -- default to COLOR
 	-- Crengine view mode
 	view_mode = "page", -- default to page mode
-
+	hinting = true,
+	
 	-- visible area within current viewing page
 	visible_area = Geom:new{x = 0, y = 0},
 	-- dimen for current viewing page
@@ -148,7 +149,9 @@ function ReaderView:drawScrollPages(bb, x, y)
 			pos.y = pos.y + self.page_gap.height
 		end
 	end
-	UIManager:scheduleIn(0, function() self.ui:handleEvent(Event:new("HintPage")) end)
+	UIManager:scheduleIn(0, function()
+		self.ui:handleEvent(Event:new("HintPage", self.hinting))
+	end)
 end
 
 function ReaderView:drawPageGap(bb, x, y)
@@ -170,7 +173,9 @@ function ReaderView:drawSinglePage(bb, x, y)
 		self.state.rotation,
 		self.state.gamma,
 		self.render_mode)
-	UIManager:scheduleIn(0, function() self.ui:handleEvent(Event:new("HintPage")) end)
+	UIManager:scheduleIn(0, function()
+		self.ui:handleEvent(Event:new("HintPage", self.hinting))
+	end)
 end
 
 function ReaderView:drawPageView(bb, x, y)

frontend/ui/reader/readerzooming.lua

@@ -110,6 +110,7 @@ function ReaderZooming:onPageUpdate(new_page_no)
 end
 
 function ReaderZooming:onHintPage()
+	if not self.view.hinting then return true end
 	if self.current_page < self.ui.document.info.number_of_pages then
 		self.ui.document:hintPage(
 			self.view.state.page + 1, 

frontend/ui/readerui.lua

@@ -15,6 +15,7 @@ require "ui/reader/readercropping"
 require "ui/reader/readerkopt"
 require "ui/reader/readercopt"
 require "ui/reader/readerscreenshot"
+require "ui/reader/readerhinting"
 
 --[[
 This is an abstraction for a reader interface
@@ -132,6 +133,14 @@ function ReaderUI:init()
 			document = self.document,
 		}
 		table.insert(self, cropper)
+		-- hinting controller
+		local hinter = ReaderHinting:new{
+			dialog = self.dialog,
+			view = self[1],
+			ui = self,
+			document = self.document,
+		}
+		table.insert(self, hinter)
 	else
 		-- make sure we load document first before calling any callback
 		table.insert(self.postInitCallback, function()