file reorganisation

all lua frontend files are now in the frontend/ directory.
all old code is cleaned up.

frontend/ui/reader/readerzooming.lua

@@ -0,0 +1,90 @@
+ReaderZooming = InputContainer:new{
+	key_events = {
+		ZoomIn = { { "Shift", Input.group.PgFwd }, doc = "zoom in", event = "Zoom", args = "in" },
+		ZoomOut = { { "Shift", Input.group.PgBack }, doc = "zoom out", event = "Zoom", args = "out" },
+		ZoomToFitPage = { {"A"}, doc = "zoom to fit page", event = "SetZoomMode", args = "page" },
+		ZoomToFitContent = { {"Shift", "A"}, doc = "zoom to fit content", event = "SetZoomMode", args = "content" },
+		ZoomToFitPageWidth = { {"S"}, doc = "zoom to fit page width", event = "SetZoomMode", args = "pagewidth" },
+		ZoomToFitContentWidth = { {"Shift", "S"}, doc = "zoom to fit content width", event = "SetZoomMode", args = "contentwidth" },
+		ZoomToFitPageHeight = { {"D"}, doc = "zoom to fit page height", event = "SetZoomMode", args = "pageheight" },
+		ZoomToFitContentHeight = { {"Shift", "D"}, doc = "zoom to fit content height", event = "SetZoomMode", args = "contentheight" },
+	},
+	zoom = 1.0,
+	zoom_mode = "free",
+	current_page = 1,
+	rotation = 0
+}
+
+function ReaderZooming:onSetDimensions(dimensions)
+	-- we were resized
+	self.dimen = dimensions
+end
+
+function ReaderZooming:onRotationUpdate(rotation)
+	self.rotation = rotation
+	self:setZoom()
+end
+
+function ReaderZooming:setZoom()
+	-- nothing to do in free zoom mode
+	if self.zoom_mode == "free" then
+		return
+	end
+	-- check if we're in bbox mode and work on bbox if that's the case
+	local page_size = {}
+	if self.zoom_mode == "content" or self.zoom_mode == "contentwidth" or self.zoom_mode == "content_height" then
+		-- TODO: enable this, still incomplete
+		page_size = self.ui.document:getUsedBBox(self.current_page)
+		self.view:handleEvent(Event:new("BBoxUpdate", page_size))
+	else
+		-- otherwise, operate on full page
+		page_size = self.ui.document:getNativePageDimensions(self.current_page)
+	end
+	-- calculate zoom value:
+	local zoom_w = self.dimen.w / page_size.w
+	local zoom_h = self.dimen.h / page_size.h
+	if self.rotation % 180 ~= 0 then
+		-- rotated by 90 or 270 degrees
+		zoom_w = self.dimen.w / page_size.h
+		zoom_h = self.dimen.h / page_size.w
+	end
+	if self.zoom_mode == "content" or self.zoom_mode == "page" then
+		if zoom_w < zoom_h then
+			self.zoom = zoom_w
+		else
+			self.zoom = zoom_h
+		end
+	elseif self.zoom_mode == "contentwidth" or self.zoom_mode == "pagewidth" then
+		self.zoom = zoom_w
+	elseif self.zoom_mode == "contentheight" or self.zoom_mode == "pageheight" then
+		self.zoom = zoom_h
+	end
+	self.view:ZoomUpdate(self.zoom)
+end
+
+function ReaderZooming:onZoom(direction)
+	debug("zoom", direction)
+	if direction == "in" then
+		self.zoom = self.zoom * 1.333333
+	elseif direction == "out" then
+		self.zoom = self.zoom * 0.75
+	end
+	debug("zoom is now at", self.zoom)
+	self:onSetZoomMode("free")
+	self.view:ZoomUpdate(self.zoom)
+	return true
+end
+
+function ReaderZooming:onSetZoomMode(what)
+	if self.zoom_mode ~= what then
+		debug("setting zoom mode to", what)
+		self.zoom_mode = what
+		self:setZoom()
+	end
+	return true
+end
+
+function ReaderZooming:onPageUpdate(new_page_no)
+	self.current_page = new_page_no
+	self:setZoom()
+end