Page layout software that allows mixed visual and programatic editing [closed]

Page layout software that allows mixed visual and programatic editing [closed]

I'd like to use a programming model for custom graphics and precision placement, and an interactive visual mode for large scale layout and less precise placements. I've used tools (PostScript, various vector drawing programs) that do one of these modes well, but leave me pining for the other model. Which tools should I be investigating? I'm currently on OS X.