Ilya Kulakov
3886f27acd
When you add an observer to an object first time, its class is implicitly changed to a KVO_originalClassName (subclass of original class). This subclass adds willChange…/didChange… methods for observable properties. If you send willChange… before you add an observer, it does nothing. But if you send didChange… just after, the app will crash, because new KVO_originalClassName nerver receives willChange… The idea is to maintain counter of all received willChange… messages (per key) and decrease it in didChange… When KVO_originalClassName is created and didChange… is received (without opening willChange… to new class), exception is not thrown immediately, but the counter is checked first. If it's greater than 0, then didChange… just closes an unboserved willChange… Otherwise exception is thrown, as expected.
Welcome to Cappuccino!
Introduction
Cappuccino is an open source framework that makes it easy to build desktop-caliber applications that run in a web browser.
Cappuccino is built on top of standard web technologies like JavaScript, and it implements most of the familiar APIs from GNUstep and Apple's Cocoa frameworks. When you program in Cappuccino, you don't need to concern yourself with the complexities of traditional web technologies like HTML, CSS, or even the DOM. The unpleasantries of building complex cross browser applications are abstracted away for you.
For more information, see http://cappuccino.org.
System Requirements
To run Cappuccino applications, all you need is a web browser that understands JavaScript.
To build Cappuccino itself, please read below. More information is available here: Getting and Building the Source.
If you're using Windows, you'll also need Cygwin.
Finally, if you want to easily stay up to date with the latest developments and contribute your work back to the Cappuccino community, you'll want to install Git.
Getting Started
To get started, download and install the current release version of Cappuccino:
$ curl https://raw.github.com/cappuccino/cappuccino/v0.9.6-RC1/bootstrap.sh >/tmp/cappuccino_bootstrap.sh && bash /tmp/cappuccino_bootstrap.sh
If you'd just like to get started using Cappuccino for your web apps, you are done.
The rest of these instructions are for building a development copy of Cappuccino. To build Cappuccino from source, check out the most recent stable version from GitHub:
$ git clone git://github.com/cappuccino/cappuccino.git (git)
or download the zipball of the most recent source code:
http://github.com/cappuccino/cappuccino/zipball/master (zip)
Then, simply type jake from within the root of the Cappuccino directory. If you
get an error like jake: command not found, you forgot to run the bootstrap script
as described above.
Jake will build a "release" copy of the frameworks. Typing jake debug will
build a debug version.
jake install will build Cappuccino and associated tools and install them for general use.
Editors
The Cappuccino TextMate Bundle: http://github.com/malkomalko/Cappuccino.tmbundle.
The Cappuccino Xcode Plugin: http://github.com/rbartolome/xcode-cappuccino.
Getting Help
If you need help with Cappuccino, you can get help from the following sources:
- FAQ
- Documentation
- Wiki
- Mailing Lists:
- IRC: irc://irc.freenode.net#cappuccino
If you discover any bugs, please file a ticket at:
http://github.com/cappuccino/cappuccino/issues
License
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA