Based on Cappuccino (http://www.cappuccino-project.org/) which is like Cocoa for the Web, Ristretto would be Cocoa Touch's counterpart. It allows to use Objective-J to create high-speed desktop & mobile web-apps using an abstract renderer interfacing Canvas and SVG rendering engine.
So far there wasn't a big emphasize on the boot process of the app. Many classes from AppKit were removed due to their deep reliability on the DOM. Right now it's RTApplication that takes care of the bootstrapping by initializing a concrete RTRenderer (SVG or Canvas) and initializing a rootView from which a user-created AppController can add its own subviews.
RTRenderer is an abstract class which serves the purpose of :
- Creating a concrete Renderer (SVG or Canvas so far) preferring Canvas over SVG
- Calling layoutSubviews and drawRect of RTView classes
RTRenderer is used as a Singleton and can be called like this:
[[RTRenderer sharedRenderer] doSomething]
Instead of using DOMElements to manipulate inputs & display elements, we use a RTElement which is also an abstract class that needs to be subclassed. Basically a RTElement represents an element that we want to see onscreen (such as an Image, a Video, a Label, a Combobox, ...) but it's architecture allows for a flexible way to instantiate the element in question. For instance, RTCanvasImageElement will instantiate a div with a canvas child. We use the canvas to draw the image but we use the div to clip the canvas when necessary. On the other hand, the RTSVGImageElement creates a svg tag and a image child. The svg tag allows the clipping of the image if necessary while the image displays the actual image.
Ristretto redefines its own RTView. We tried to use as many Cappuccino classes as possible and in most cases it means that we had to fix them to remove any DOM references and associate these calls with our renderer.
There was lots of changes made to most of Cappuccino files so some functionalities might not work anymore
RTView is working with support for 3- and 9-part images
RTImageView & RTVideoView should be working just fine with support for setScaling and setAlignment.