Add optional frame to brush previews

This way, it's easiere to see where the edges are of the preview

worldeditadditions/lib/sculpt/preview_brush.lua

@@ -7,7 +7,8 @@ local make_brush = dofile(wea.modpath.."/lib/sculpt/make_brush.lua")
 -- @param	brush_name	string	The name of the brush to create a preview for.
 -- @param	target_size	Vector3	The target size of the brush to create. Default: (10, 10, 0).
 -- @returns	bool,string	If the operation was successful, true followed by a preview of the brush as a string. If the operation was not successful, false and an error message string is returned instead.
-local function preview_brush(brush_name, target_size)
+local function preview_brush(brush_name, target_size, framed)
+	if framed == nil then framed = true end
 	if not target_size then target_size = Vector3.new(10, 10, 0) end
 	local success, brush, brush_size = make_brush(brush_name, target_size)
 	
@@ -22,11 +23,14 @@ local function preview_brush(brush_name, target_size)
 	values["."] = 1
 	values[" "] = 0
 	
-	print(wea.inspect(brush))
+	local frame_vertical = "+"..string.rep("-", math.max(0, brush_size.x)).."+"
 	
 	local result = {}
+	if framed then table.insert(result, frame_vertical) end
+	
 	for y = brush_size.y-1, 0, -1 do
 		local row = {}
+		if framed then table.insert(row, "|") end
 		for x = brush_size.x-1, 0, -1 do
 			local i = y*brush_size.x + x
 			local pixel = " "
@@ -39,9 +43,13 @@ local function preview_brush(brush_name, target_size)
 			end
 			table.insert(row, pixel)
 		end
+		if framed then table.insert(row, "|") end
 		table.insert(result, table.concat(row))
 	end
-	print("RESULT", wea.inspect(result))
+	
+	if framed then table.insert(result, frame_vertical) end
+	
+	
 	return true, table.concat(result, "\n")
 end