restore zoom mode when toggling reflow on/off

frontend/document/koptinterface.lua

@@ -134,7 +134,7 @@ KoptOptions = {
 						event = "RedrawCurrentPage",
 					},
 					{
-						event = "SetZoomMode", 
+						event = "RestoreZoomMode",
 						args = {"page", nil},
 					},
 				}

frontend/ui/reader/readerkopt.lua

@@ -0,0 +1,22 @@
+
+ReaderKoptinterface = InputContainer:new{}
+
+function ReaderKoptinterface:onReadSettings(config)
+	self.normal_zoom_mode = config:readSetting("zoom_mode") or "page"
+	if self.document.configurable.text_wrap == 1 then
+		self.ui:handleEvent(Event:new("SetZoomMode", "page", "koptinterface"))
+	else
+		self.ui:handleEvent(Event:new("SetZoomMode", self.normal_zoom_mode, "koptinterface"))
+	end
+end
+
+function ReaderKoptinterface:onRestoreZoomMode(zoom_mode)
+	self.ui:handleEvent(Event:new("SetZoomMode", zoom_mode or self.normal_zoom_mode, "koptinterface"))
+	return true
+end
+
+function ReaderKoptinterface:onSetZoomMode(zoom_mode, orig)
+	if orig ~= "koptinterface" then
+		self.normal_zoom_mode = zoom_mode
+	end
+end

frontend/ui/readerui.lua

@@ -12,6 +12,7 @@ require "ui/reader/readertypeset"
 require "ui/reader/readermenu"
 require "ui/reader/readerconfig"
 require "ui/reader/readercropping"
+require "ui/reader/readerkopt"
 
 --[[
 This is an abstraction for a reader interface
@@ -158,6 +159,14 @@ function ReaderUI:init()
 			ui = self
 		}
 		table.insert(self, config_dialog)
+		-- koptinterface controller
+		local koptinterface = ReaderKoptinterface:new{
+			dialog = self.dialog,
+			view = self[1],
+			ui = self,
+			document = self.document,
+		}
+		table.insert(self, koptinterface)
 	end
 	--DEBUG(self.doc_settings)
 	-- we only read settings after all the widgets are initialized