end
	love.graphics.setFont(love.graphics.newFont(scale(20)))  -- editor objects implicitly depend on current font
	-- translate Page to Surface
	while #Surface > 3 do table.remove(Surface) end  -- HACK
	local red = false
	for x=-1000,2000,300 do
		for y=-10000,10000,200 do
			add_thick_line({type='line', data={x,y, x+200,y+200, x,y+400}, r=red and 1 or 0,g=red and 0 or 0.5,b=0}, 10)
			red = not red
		end
	end
	compute_layout(Page, Page.x,Page.y, Surface, preserve_screen_top_of_cursor_node)
	compute_layout(Page2, Page2.x,Page2.y, Surface, preserve_screen_top_of_cursor_node)
	-- continue the pipeline
	B(preserve_screen_top_of_cursor_node)
	-- TODO: ugly that we're manipulating editor objects twice

vy = function(sy)
	-- turn surface coordinates into viewport coordinates
	return scale(sy-Viewport.y)
end

vx = function(sx)
	-- turn surface coordinates into viewport coordinates
	return scale(sx-Viewport.x)
end

	-- Compute screen_top1 in viewport coordinates because the editor's font takes scaling into account.
	if vy(node.y) > 0 then

		node.editor.screen_top1, node.editor.top = schema1_of_y(node.editor, -vy(node.y))

	if node.editor.font_height ~= scale(20) then
		edit.update_font_settings(node.editor, scale(20))
	end

	node.editor.width = node.editor.right - node.editor.left
end

		A()

end

	-- return the height of a text editor node (explicit width). The result is unscaled.
	local y = 0
	for i=1,#node.editor.lines do
		local line = node.editor.lines[i]
		if node.editor.line_cache[i] == nil then
			node.editor.line_cache[i] = {}
		end
		node.editor.line_cache[i].fragments = nil
		node.editor.line_cache[i].screen_line_starting_pos = nil
		Text.populate_screen_line_starting_pos(node.editor, i)
		y = y + 20*1.3*#node.editor.line_cache[i].screen_line_starting_pos
		Text.clear_screen_line_cache(node.editor, i)
	end
	return y

		-- position cursor in node

		return

	-- pan surface
	Pan = {x=Viewport.x+x/Viewport.zoom,y=Viewport.y+y/Viewport.zoom}