Alt-R to switch between STANDARD and KOPTReader

Currently it closes the file and drops you back to the filemanager,
so you have to re-open it manually.

extentions.lua

@@ -1,7 +1,6 @@
 -- List of acceptable extensions
 
 ext = {
-	koptRead = ";djvu;pdf;",
 	djvuRead = ";djvu;",
 	pdfRead  = ";pdf;xps;cbz;",
 	creRead  = ";epub;txt;rtf;htm;html;mobi;prc;azw;fb2;chm;pdb;doc;tcr;zip;",
@@ -10,17 +9,22 @@ ext = {
 }
 
 
-function ext:getReader(ftype)
+function ext:getReader(ftype, oldreader)
 	local s = ";"
 	if ftype == "" then
 		return nil
-	-- for testing use koptreader for djvu/pdf files by default
-	elseif string.find(self.koptRead,s..ftype..s) then
-		return KOPTReader
 	elseif string.find(self.pdfRead,s..ftype..s) then
-		return PDFReader
+		if oldreader and oldreader.use_koptreader == true then
+			return KOPTReader
+		else
+			return PDFReader
+		end
 	elseif string.find(self.djvuRead,s..ftype..s) then
-		return DJVUReader
+		if oldreader and oldreader.use_koptreader then
+			return KOPTReader
+		else
+			return DJVUReader
+		end
 	elseif string.find(self.picRead,s..ftype..s) then
 		return PICViewer
 	elseif FileChooser.filemanager_expert_mode > FileChooser.BEGINNERS_MODE

reader.lua

@@ -46,6 +46,9 @@ function openFile(filename)
 	if reader then
 		InfoMessage:inform("Opening document... ", nil, 0, MSG_AUX)
 		reader:preLoadSettings(filename)
+		-- re-establish the reader due to use_koptreader setting
+		reader = ext:getReader(file_type, reader)
+		reader:preLoadSettings(filename)
 		local ok, err = reader:open(filename)
 		if ok then
 			reader:loadSettings(filename)

unireader.lua

@@ -68,6 +68,7 @@ UniReader = {
 	show_overlap = 0,
 	show_overlap_enable,
 	show_links_enable,
+	use_koptreader,
 
 	-- the document:
 	doc = nil,
@@ -949,6 +950,12 @@ end
 function UniReader:preLoadSettings(filename)
 	self.settings = DocSettings:open(filename)
 	self.cache_document_size = self.settings:readSetting("cache_document_size") or self.cache_document_size
+
+	local tmp = self.settings:readSetting("use_koptreader")
+	if tmp ~= nil then
+		self.use_koptreader = tmp
+		print("set use_koptreader=", self.use_koptreader)
+	end
 end
 
 -- all defaults which can be overriden by reader objects
@@ -956,6 +963,7 @@ end
 function UniReader:setDefaults()
 	self.show_overlap_enable = true
 	self.show_links_enable = true
+	self.use_koptreader = false
 end
 
 -- This is a low-level method that can be shared with all readers.
@@ -2621,6 +2629,21 @@ function UniReader:addAllCommands()
 			self:redrawCurrentPage()
 		end)
 
+	self.commands:add(KEY_R, MOD_ALT, "R",
+		"toggle between standard and koptreader",
+		function(unireader)
+			unireader.use_koptreader = not unireader.use_koptreader
+			if unireader.use_koptreader then
+				InfoMessage:inform("Switching to KOPTReader", 1000, 1, MSG_AUX)
+			else
+				InfoMessage:inform("Switching to STANDARD Reader", 1000, 1, MSG_AUX)
+			end
+			self.settings:saveSetting("use_koptreader", unireader.use_koptreader)
+			self.doc:close()
+			self.doc = nil
+			return "break"
+		end)
+
 	self.commands:add(KEY_R, MOD_SHIFT, "R",
 		"set full screen refresh count",
 		function(unireader)