cleanup, also removal of G_* constants

a bit of cleanup, switched width/height combo over to use
Geom() objects, moved framebuffer handling to Screen object,
callback syntax sanitizing, lots of small changes

frontend/document/credocument.lua

@@ -55,7 +55,7 @@ function CreDocument:init()
 	local style_sheet = "./data/"..file_type..".css"
 
 	ok, self._document = pcall(cre.openDocument, self.file, style_sheet,
-								G_width, G_height)
+				Screen:getWidth(), Screen:getHeight())
 	if not ok then
 		self.error_message = self.doc -- will contain error message
 		return

frontend/document/document.lua

@@ -105,7 +105,7 @@ end
 
 -- calculates page dimensions
 function Document:getPageDimensions(pageno, zoom, rotation)
-	local native_dimen = Geom:copy(self:getNativePageDimensions(pageno))
+	local native_dimen = self:getNativePageDimensions(pageno):copy()
 	if rotation == 90 or rotation == 270 then
 		-- switch orientation
 		native_dimen.w, native_dimen.h = native_dimen.h, native_dimen.w

frontend/ui/dialog.lua

@@ -49,6 +49,9 @@ function FocusManager:onFocusMove(args)
 		return true
 	end
 
+	if not self.layout or not self.layout[self.selected.y] or not self.layout[self.selected.y][self.selected.x] then
+		return true
+	end
 	local current_item = self.layout[self.selected.y][self.selected.x]
 	while true do
 		if self.selected.x + dx > #self.layout[self.selected.y]
@@ -140,7 +143,7 @@ ConfirmBox = FocusManager:new{
 function ConfirmBox:init()
 	-- calculate box width on the fly if not given
 	if not self.width then
-		self.width = G_width - 200
+		self.width = Screen:getWidth() - 200
 	end
 	-- build bottons
 	self.key_events.Close = { {{"Home","Back"}}, doc = "cancel" }
@@ -158,7 +161,7 @@ function ConfirmBox:init()
 	self.selected.x = 2 -- Cancel is default 
 
 	self[1] = CenterContainer:new{
-		dimen = { w = G_width, h = G_height },
+		dimen = Screen:getSize(),
 		FrameContainer:new{
 			margin = 2,
 			background = 0,
@@ -222,7 +225,7 @@ InfoMessage = InputContainer:new{
 function InfoMessage:init()
 	-- we construct the actual content here because self.text is only available now
 	self[1] = CenterContainer:new{
-		dimen = { w = G_width, h = G_height },
+		dimen = Screen:getSize(),
 		FrameContainer:new{
 			margin = 2,
 			background = 0,
@@ -260,8 +263,7 @@ end
 Widget that displays a shortcut icon for menu item
 ]]
 ItemShortCutIcon = WidgetContainer:new{
-	width = 22,
-	height = 22,
+	dimen = Geom:new{ w = 22, h = 22 },
 	key = nil,
 	bordersize = 2,
 	radius = 0,
@@ -293,15 +295,9 @@ function ItemShortCutIcon:init()
 		bordersize = self.bordersize,
 		radius = radius,
 		background = background,
-		dimen = {
-			w = self.width,
-			h = self.height,
-		},
+		dimen = self.dimen,
 		CenterContainer:new{
-			dimen = {
-				w = self.width,
-				h = self.height,
-			},
+			dimen = self.dimen,
 			TextWidget:new{
 				text = self.key,
 				face = sc_face,
@@ -319,43 +315,41 @@ MenuItem = InputContainer:new{
 	text = nil,
 	detail = nil,
 	face = Font:getFace("cfont", 22),
-	width = nil,
-	height = nil,
+	dimen = nil,
 	shortcut = nil,
 	shortcut_style = "square",
 	_underline_container = nil,
 }
 
 function MenuItem:init()
-	local shortcut_icon_w = 0
-	local shortcut_icon_h = 0
+	local shortcut_icon_dimen = Geom:new()
 	if self.shortcut then
-		shortcut_icon_w = math.floor(self.height*4/5)
-		shortcut_icon_h = shortcut_icon_w 
+		shortcut_icon_dimen.w = math.floor(self.dimen.h*4/5)
+		shortcut_icon_dimen.h = shortcut_icon_dimen.w 
 	end
 
 	self.detail = self.text
 	-- 15 for HorizontalSpan,
-	self.content_width = self.width - shortcut_icon_w - 15
+	self.content_width = self.dimen.w - shortcut_icon_dimen.w - 15
 
 	-- we need this table per-instance, so we declare it here
 	self.active_key_events = {
 		Select = { {"Press"}, doc = "chose selected item" },
 	}
 
-	w = sizeUtf8Text(0, self.width, self.face, self.text, true).x
+	w = sizeUtf8Text(0, self.dimen.w, self.face, self.text, true).x
 	if w >= self.content_width then
 		self.active_key_events.ShowItemDetail = { {"Right"}, doc = "show item detail" }
 		indicator = "  >>"
-		indicator_w = sizeUtf8Text(0, self.width, self.face, indicator, true).x
+		indicator_w = sizeUtf8Text(0, self.dimen.w, self.face, indicator, true).x
 		self.text = getSubTextByWidth(self.text, self.face,
 			self.content_width - indicator_w, true) .. indicator
 	end
 
 	self._underline_container = UnderlineContainer:new{
-		dimen = {
+		dimen = Geom:new{
 			w = self.content_width,
-			h = self.height
+			h = self.dimen.h
 		},
 		HorizontalGroup:new {
 			align = "center",
@@ -369,8 +363,7 @@ function MenuItem:init()
 	self[1] = HorizontalGroup:new{
 		HorizontalSpan:new{ width = 5 },
 		ItemShortCutIcon:new{
-			width = shortcut_icon_w,
-			height = shortcut_icon_h,
+			dimen = shortcut_icon_dimen,
 			key = self.shortcut,
 			radius = shortcut_icon_r,
 			style = self.shortcut_style,
@@ -414,8 +407,7 @@ Menu = FocusManager:new{
 	sface = Font:getFace("scfont", 20),
 
 	title = "No Title",
-	height = 500,
-	width = 500,
+	dimen = Geom:new{ w = 500, h = 500 },
 	item_table = {},
 	item_shortcuts = {
 		"Q", "W", "E", "R", "T", "Y", "U", "I", "O", "P",
@@ -424,17 +416,23 @@ Menu = FocusManager:new{
 	},
 	is_enable_shortcut = true,
 
-	item_height = 36,
+	item_dimen = nil,
 	page = 1,
 
-	on_select_callback = function() end,
-
 	item_group = nil,
 	page_info = nil,
+
+	-- set this to true to not paint as popup menu
+	is_borderless = false,
 }
 
 function Menu:init()
-	self.perpage = math.floor(self.height / self.item_height) - 2
+	self.item_dimen = Geom:new{
+		w = self.dimen.w,
+		h = 36, -- hardcoded for now
+	}
+
+	self.perpage = math.floor(self.dimen.h / self.item_dimen.h) - 2
 	self.page = 1
 	self.page_num = math.ceil(#self.item_table / self.perpage)
 
@@ -459,21 +457,36 @@ function Menu:init()
 		face = self.fface,
 	}
 
-	self[1] = CenterContainer:new{
-		FrameContainer:new{
+	local content = VerticalGroup:new{
+		TextWidget:new{
+			text = self.title,
+			face = self.tface,
+		},
+		self.item_group,
+		self.page_info,
+	} -- VerticalGroup
+
+	if not self.is_borderless then
+		self[1] = CenterContainer:new{
+			FrameContainer:new{
+				background = 0,
+				radius = math.floor(self.dimen.w/20),
+				content
+			},
+			dimen = Screen:getSize(),
+		}
+		-- we need to substract border, margin and padding
+		self.item_dimen.w = self.item_dimen.w - 14
+	else
+		self[1] = FrameContainer:new{
 			background = 0,
-			radius = math.floor(self.width/20),
-			VerticalGroup:new{
-				TextWidget:new{
-					text = self.title,
-					face = self.tface,
-				},
-				self.item_group,
-				self.page_info,
-			}, -- VerticalGroup
-		}, -- FrameContainer
-		dimen = {w = G_width, h = G_height},
-	} -- CenterContainer
+			bordersize = 0,
+			padding = 0,
+			margin = 0,
+			dimen = Screen:getSize(),
+			content
+		}
+	end
 
 	if #self.item_table > 0 then
 		-- if the table is not yet initialized, this call
@@ -503,11 +516,10 @@ function Menu:updateItems()
 					item_shortcut = "Ent"
 				end
 			end
-			item_tmp = MenuItem:new{
+			local item_tmp = MenuItem:new{
 				text = self.item_table[i].text,
 				face = self.cface,
-				width = self.width - 14,
-				height = self.item_height,
+				dimen = self.item_dimen,
 				shortcut = item_shortcut,
 				shortcut_style = shortcut_style,
 			}
@@ -517,11 +529,15 @@ function Menu:updateItems()
 		end -- if i <= self.items
 	end -- for c=1, self.perpage
 	-- set focus to first menu item
-	self.item_group[1]:onFocus()
-	-- reset focus manager accordingly
-	self.selected = { x = 1, y = 1 }
-	-- update page information
-	self.page_info.text = "page "..self.page.."/"..self.page_num
+	if self.item_group[1] then
+		self.item_group[1]:onFocus()
+		-- reset focus manager accordingly
+		self.selected = { x = 1, y = 1 }
+		-- update page information
+		self.page_info.text = "page "..self.page.."/"..self.page_num
+	else
+		self.page_info.text = "no choices available"
+	end
 
 	UIManager:setDirty(self)
 end
@@ -531,16 +547,31 @@ function Menu:onSelectByShortCut(_, keyevent)
 		if k > self.perpage then
 			break
 		elseif v == keyevent.key then
-			local item = self.item_table[(self.page-1)*self.perpage+k]
-			self.item_table = nil
-			UIManager:close(self)
-			self.on_select_callback(item)
+			if self.item_table[(self.page-1)*self.perpage + k] then
+				self:onMenuSelect(self.item_table[(self.page-1)*self.perpage + k])
+			end
 			break 
 		end
 	end
 	return true
 end
 
+--[[
+override this function to process the item selected in a different manner
+]]--
+function Menu:onMenuSelect(item)
+	UIManager:close(self)
+	self:onMenuChoice(item)
+	return true
+end
+
+--[[
+override this function to handle the choice
+]]--
+function Menu:onMenuChoice(item)
+	return true
+end
+
 function Menu:onNextPage()
 	if self.page < self.page_num then
 		self.page = self.page + 1
@@ -558,8 +589,7 @@ function Menu:onPrevPage()
 end
 
 function Menu:onSelect()
-	UIManager:close(self)
-	self.on_select_callback(self.item_table[(self.page-1)*self.perpage+self.selected.y])
+	self:onMenuSelect(self.item_table[(self.page-1)*self.perpage+self.selected.y])
 	return true
 end
 
@@ -567,3 +597,4 @@ function Menu:onClose()
 	UIManager:close(self)
 	return true
 end
+

frontend/ui/filechooser.lua

@@ -43,15 +43,18 @@ function FileChooser:changeToPath(path)
 	Menu.init(self) -- call parent's init()
 end
 
-function FileChooser:onSelect()
-	local selected = self.item_table[(self.page-1)*self.perpage+self.selected.y]
-	if lfs.attributes(selected.path, "mode") == "directory" then
+function FileChooser:onMenuSelect(item)
+	if lfs.attributes(item.path, "mode") == "directory" then
 		UIManager:close(self)
-		self:changeToPath(selected.path)
+		self:changeToPath(item.path)
 		UIManager:show(self)
 	else
-		UIManager:close(self)
-		self.on_select_callback(self.item_table[self.selected.y])
+		self:onFileSelect(item.path)
 	end
 	return true
 end
+
+function FileChooser:onFileSelect(file)
+	UIManager:close(self)
+	return true
+end

frontend/ui/geometry.lua

@@ -23,12 +23,12 @@ function Geom:new(o)
 	return o
 end
 
-function Geom:copy(o)
-	local n = self:new()
-	n.x = o.x
-	n.y = o.y
-	n.w = o.w
-	n.h = o.h
+function Geom:copy()
+	local n = Geom:new()
+	n.x = self.x
+	n.y = self.y
+	n.w = self.w
+	n.h = self.h
 	return n
 end
 
@@ -42,6 +42,7 @@ offset rectangle or point by relative values
 function Geom:offsetBy(dx, dy)
 	self.x = self.x + dx
 	self.y = self.y + dy
+	return self
 end
 
 --[[
@@ -50,6 +51,7 @@ offset rectangle or point to certain coordinates
 function Geom:offsetTo(x, y)
 	self.x = x
 	self.y = y
+	return self
 end
 
 --[[
@@ -60,6 +62,18 @@ if a single factor is given, it is applied to both width and height
 function Geom:scaleBy(zx, zy)
 	self.w = self.w * zx
 	self.h = self.h * (zy or zx)
+	return self
+end
+
+--[[
+enlarges or shrinks dimensions or rectangles
+
+note that for rectangles the offset stays the same
+]]--
+function Geom:changeSizeBy(dw, dh)
+	self.w = self.w + dw
+	self.h = self.h + dh
+	return self
 end
 
 --[[
@@ -118,12 +132,9 @@ end
 set size of dimension or rectangle to size of given dimension/rectangle
 ]]--
 function Geom:setSizeTo(rect_b)
-	if self.w == rect_b.w and self.h == rect_b.h then
-		return false
-	end
 	self.w = rect_b.w
 	self.h = rect_b.h
-	return true
+	return self
 end
 
 --[[

frontend/ui/reader/readertoc.lua

@@ -2,7 +2,7 @@ ReaderToc = InputContainer:new{
 	key_events = {
 		ShowToc = { {"T"}, doc = "show Table of Content menu"},
 	},
-	dimen = Geom:new{ w = G_width-20, h = G_height-20},
+	dimen = Geom:new{ w = Screen:getWidth()-20, h = Screen:getHeight()-20},
 	current_page = 0,
 	current_pos = 0,
 }
@@ -51,22 +51,21 @@ function ReaderToc:getTocTitleOfCurrentPage()
 end
 
 function ReaderToc:onShowToc()
-	function callback(item)
-		self.ui:handleEvent(Event:new("PageUpdate", item.page))
-	end
-
 	local items = self.ui.document:getToc()
 	-- build menu items
 	for _,v in ipairs(items) do
 		v.text = ("        "):rep(v.depth-1)..self:cleanUpTocTitle(v.title)
 	end
-	toc_menu = Menu:new{
+	local toc_menu = Menu:new{
 		title = "Table of Contents",
 		item_table = items,
 		width = self.dimen.w,
 		height = self.dimen.h,
-		on_select_callback = callback,
+		ui = self.ui
 	}
+	function toc_menu:onMenuChoice(item)
+		self.ui:handleEvent(Event:new("PageUpdate", item.page))
+	end
 
 	UIManager:show(toc_menu)
 end

frontend/ui/reader/readerview.lua

@@ -76,7 +76,7 @@ end
 
 function ReaderView:PanningUpdate(dx, dy)
 	DEBUG("pan by", dx, dy)
-	local old = Geom:copy(self.visible_area)
+	local old = self.visible_area:copy()
 	self.visible_area:offsetWithin(self.page_area, dx, dy)
 	if self.visible_area ~= old then
 		-- flag a repaint

frontend/ui/screen.lua

@@ -46,6 +46,8 @@ Screen = {
 	kpv_rotation_mode = nil,
 
 	saved_bb = nil,
+
+	fb = einkfb.open("/dev/fb0")
 }
 
 -- @orien: 1 for clockwise rotate, -1 for anti-clockwise
@@ -61,13 +63,28 @@ function Screen:screenRotate(orien)
 
 	self.cur_rotation_mode = (self.cur_rotation_mode + orien) % 4
 	-- you have to reopen framebuffer after rotate
-	fb:setOrientation(self.cur_rotation_mode)
-	fb:close()
-	fb = einkfb.open("/dev/fb0")
+	self.fb:setOrientation(self.cur_rotation_mode)
+	self.fb:close()
+	self.fb = einkfb.open("/dev/fb0")
+end
+
+function Screen:getSize()
+	local w, h = self.fb:getSize()
+	return Geom:new{w = w, h = h}
+end
+
+function Screen:getWidth()
+	local w, _ = self.fb:getSize()
+	return w
+end
+
+function Screen:getHeight()
+	local _, h = self.fb:getSize()
+	return h
 end
 
 function Screen:updateRotationMode()
-	if KEY_FW_DOWN == 116 then -- in EMU mode always set to 0
+	if util.isEmulated() then -- in EMU mode always set to 0
 		self.cur_rotation_mode = 0
 	else
 		orie_fd = assert(io.open("/sys/module/eink_fb_hal_broads/parameters/bs_orientation", "r"))
@@ -77,7 +94,7 @@ function Screen:updateRotationMode()
 end
 
 function Screen:saveCurrentBB()
-	local width, height = G_width, G_height
+	local width, height = self:getWidth(), self.getHeight()
 
 	if not self.saved_bb then
 		self.saved_bb = Blitbuffer.new(width, height)
@@ -94,14 +111,14 @@ function Screen:restoreFromSavedBB()
 end
 
 function Screen:getCurrentScreenBB()
-	local bb = Blitbuffer.new(G_width, G_height)
-	bb:blitFullFrom(fb.bb)
+	local bb = Blitbuffer.new(self:getWidth(), self:getHeight())
+	bb:blitFullFrom(self.fb.bb)
 	return bb
 end
 
 function Screen:restoreFromBB(bb)
 	if bb then
-		fb.bb:blitFullFrom(bb)
+		self.fb.bb:blitFullFrom(bb)
 	else
 		DEBUG("Got nil bb in restoreFromSavedBB!")
 	end

frontend/ui/ui.lua

@@ -6,12 +6,7 @@ require "ui/dialog"
 require "settings" -- for DEBUG(), TODO: put DEBUG() somewhere else
 
 
--- we also initialize the framebuffer
-
-fb = einkfb.open("/dev/fb0")
-G_width, G_height = fb:getSize()
-
--- and the input handling
+-- initialize the input handling
 
 Input:init()
 
@@ -151,7 +146,7 @@ function UIManager:run()
 		local dirty = false
 		for _, widget in ipairs(self._window_stack) do
 			if self._dirty[widget.widget] then
-				widget.widget:paintTo(fb.bb, widget.x, widget.y)
+				widget.widget:paintTo(Screen.fb.bb, widget.x, widget.y)
 				-- and remove from list after painting
 				self._dirty[widget.widget] = nil
 				-- trigger repaint
@@ -161,7 +156,7 @@ function UIManager:run()
 
 		if dirty then
 			-- refresh FB
-			fb:refresh(self.refresh_type) -- TODO: refresh explicitly only repainted area
+			Screen.fb:refresh(self.refresh_type) -- TODO: refresh explicitly only repainted area
 			-- reset refresh_type
 			self.refresh_type = 0
 		end

frontend/ui/widget.lua

@@ -1,3 +1,4 @@
+require "ui/screen"
 require "ui/rendertext"
 require "ui/graphics"
 require "ui/image"
@@ -186,10 +187,13 @@ function TextWidget:getSize()
 		--self:_render()
 	--end
 	--return { w = self._length, h = self._bb:getHeight() }
-	
-	self._length = sizeUtf8Text(0, G_width, self.face, self.text, true).x
+	local tsize = sizeUtf8Text(0, Screen:getWidth(), self.face, self.text, true)
+	if not tsize then
+		return Geom:new{}
+	end
+	self._length = tsize.x
 	self._height = self.face.size * 1.5
-	return {
+	return Geom:new{
 		w = self._length,
 		h = self._height,
 	}
@@ -226,7 +230,7 @@ TextBoxWidget = Widget:new{
 
 function TextBoxWidget:_wrapGreedyAlg(h_list)
 	local cur_line_width = 0
-	local space_w = sizeUtf8Text(0, G_width, self.face, " ", true).x
+	local space_w = sizeUtf8Text(0, Screen:getWidth(), self.face, " ", true).x
 	local cur_line = {}
 	local v_list = {}
 
@@ -255,7 +259,7 @@ function TextBoxWidget:_getVerticalList(alg)
 	for w in self.text:gmatch("%S+") do
 		word_box = {}
 		word_box.word = w
-		word_box.width = sizeUtf8Text(0, G_width, self.face, w, true).x
+		word_box.width = sizeUtf8Text(0, Screen:getWidth(), self.face, w, true).x
 		table.insert(h_list, word_box)
 	end
 
@@ -269,7 +273,7 @@ function TextBoxWidget:_render()
 	local v_list = self.v_list
 	local font_height = self.face.size
 	local line_height_px = self.line_height * font_height
-	local space_w = sizeUtf8Text(0, G_width, self.face, " ", true).x
+	local space_w = sizeUtf8Text(0, Screen:getWidth(), self.face, " ", true).x
 	local h = (font_height + line_height_px) * #v_list - line_height_px
 	self._bb = Blitbuffer.new(self.width, h)
 	local y = font_height

wtest.lua

@@ -6,18 +6,18 @@ require "document/document"
 
 TestGrid = Widget:new{}
 
-function TestGrid:paintTo()
-	v_line = math.floor(G_width / 50)
-	h_line = math.floor(G_height / 50)
+function TestGrid:paintTo(bb)
+	v_line = math.floor(bb:getWidth() / 50)
+	h_line = math.floor(bb:getHeight() / 50)
 	for i=1,h_line do
 		y_num = i*50
-		renderUtf8Text(fb.bb, 0, y_num+10, Font:getFace("ffont", 12), y_num, true)
-		fb.bb:paintRect(0, y_num, G_width, 1, 10)
+		renderUtf8Text(bb, 0, y_num+10, Font:getFace("ffont", 12), y_num, true)
+		bb:paintRect(0, y_num, bb:getWidth(), 1, 10)
 	end
 	for i=1,v_line do
 		x_num = i*50
-		renderUtf8Text(fb.bb, x_num, 10, Font:getFace("ffont", 12), x_num, true)
-		fb.bb:paintRect(x_num, 0, 1, G_height, 10)
+		renderUtf8Text(bb, x_num, 10, Font:getFace("ffont", 12), x_num, true)
+		bb:paintRect(x_num, 0, 1, bb:getHeight(), 10)
 	end
 end
 
@@ -33,7 +33,7 @@ Background = InputContainer:new{
 	FrameContainer:new{
 		background = 3,
 		bordersize = 0,
-		dimen = { w = G_width, h = G_height }
+		dimen = Screen:getSize()
 	}
 }
 
@@ -133,14 +133,14 @@ M = Menu:new{
 
 
 readerwindow = CenterContainer:new{
-	dimen = Geom:new{ w = G_width, h = G_height },
+	dimen = Screen:getSize(),
 	FrameContainer:new{
 		background = 0
 	}
 }
 reader = ReaderUI:new{
 	dialog = readerwindow,
-	dimen = Geom:new{ w = G_width - 100, h = G_height - 100 },
+	dimen = Geom:new{ w = Screen:getWidth() - 100, h = Screen:getHeight() - 100 },
 	document = DocumentRegistry:getProvider("test/2col.pdf")
 	--document = DocumentRegistry:getProvider("test/djvu3spec.djvu")
 	--document = DocumentRegistry:getProvider("./README.TXT")