[webkit-dev] Role of all loaders

[Darin Adler]

On Feb 19, 2009, at 11:17 PM, Nilesh Patil wrote:

> FrameLoader

Controls the process of loading web pages into a frame. Contains all  
the loading-related functions and data instead of having them all on  
Frame itself. There’s one of these for each frame.

> DocumentLoader

Controls the process of loading one particular web page into a frame.  
When a new page is loaded, the frame loader creates a new document  
loader and then later destroys the old one.

> DocLoader

Part of the caching machinery. Manages the cached loading for a  
particular document. May be merged with DocumentLoader at some point  
in the future, or perhaps renamed.

> MainResourceLoader

FrameLoader and DocumentLoader use ResourceLoader objects to load  
individual resources. The main resource is the HTML file (or SVG file  
or whatever). The ResourceLoader for the main resource is a  
MainResourceLoader.

> Sub resource Loader

The ResourceLoader objects for subresources such as images, scripts,  
and CSS style sheets are SubresourceLoader objects.

     -- Darin