koreader/frontend/ui/reader/readeractivityindicator.lua

require "ui/device"

ReaderActivityIndicator = EventListener:new{}

function ReaderActivityIndicator:init()
	local dev_mod = Device:getModel()
	if dev_mod == "KindlePaperWhite" or dev_mod == "KindleTouch" then
		require "liblipclua"
		self.lipc_handle = lipc.init("com.github.koreader.activityindicator")
	end
end

function ReaderActivityIndicator:onStartActivityIndicator()	
	if self.lipc_handle then
		-- check if activity indicator is needed
		if self.document.configurable.text_wrap == 1 then
			-- start indicator depends on pillow being enabled
			self.lipc_handle:set_string_property(
				"com.lab126.pillow", "activityIndicator",
				'{"activityIndicator":{ \
					"action":"start","timeout":10000, \
					"clientId":"com.github.koreader.activityindicator", \
					"priority":true}}')
			self.indicator_started = true
		end
	end
	return true
end

function ReaderActivityIndicator:onStopActivityIndicator()
	if self.lipc_handle and self.indicator_started then
		-- stop indicator depends on pillow being enabled
		self.lipc_handle:set_string_property(
			"com.lab126.pillow", "activityIndicator",
			'{"activityIndicator":{ \
				"action":"stop","timeout":10000, \
				"clientId":"com.github.koreader.activityindicator", \
				"priority":true}}')
		self.indicator_started = false
		util.usleep(1000000)
	end
	return true
end