koreader/frontend/ui/reader/readerhinting.lua

local EventListener = require("ui/widget/eventlistener")

local ReaderHinting = EventListener:new{
	hinting_states = {}
}

function ReaderHinting:onHintPage()
	if not self.view.hinting then return true end
	for i=1, DHINTCOUNT do
		if self.zoom.current_page + i <= self.ui.document.info.number_of_pages then
			self.ui.document:hintPage(
				self.view.state.page + i,
				self.zoom:getZoom(self.view.state.page + i),
				self.view.state.rotation,
				self.view.state.gamma,
				self.view.render_mode)
		end
	end
	return true
end

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

return ReaderHinting