I am working on a Firefox Add-on that view TIFF Files. I'm having trouble figuring out how to do the UI, buttons, scrollers etc. I'm on a mac, so the program is being written in either C or Objective-C, in case that makes a difference.
I'm thinking that XUL might be a way to do the UI. If I could wrap my plugin in some sort of XUL wrapper, and then have the wrapper send messages to the compiled code, that might solve my problem.
However, I'm not sure that this is how XUL works. All of the examples I've seen have basically been HTML, made slightly more complicated...
Alternatively, I could write the plugin in Java, if it's easier to embed a JAR file into XUL. Actually that might be the best because then It would (probably) be platform independent...
You can write C++ plugins for XULRunner using the XPCOM technology. See here for a good tutorial. Documentation is scarce though, be warned!
You can create an interface to your C/C++ code to be accessed from JavaScript using the XPIDL interface language.
I don't think you can embed Java code in XUL though. You are probably referring to JAR Manifests.
Related
When using a third-party JavaScript library in my Dart project, I manually go through the library's documentation and iterate through its properties and methods to build the Dart code through a series of tedious context and callMethod calls. Has anyone figured out a way to automate this?
I tried to first find a command-line interface that introspects the JavaScript library so that I can auto-generate the Dart source code. I've been unsuccessful in my search.
I've tried to make my implementation of .d.ts -> dart2js annotations converter.
This is possible way to automate the process.
Please, see https://github.com/denis-aes/DefinitelyTyped.dart
Introspecting JS lib can be really hard due to the dynamic face of the JS language.
In the Typescript world there are *.d.ts files used to provide types to existing libraries. As far as I can tell most of those files are manually writen.
For now such a tool isn't yet available.
I want to write a simple editor with basic autocomplete functionality for the Go language as a pet project. How would one go about doing it? I took a look at the Go plugins for Eclipse and IntelliJ, but they were too big for me to comprehend (not to mention getting one to compile).
The Go standard library offers the building blocks for a Go parser which
you can use to parse the source files and look for function definitions and the like.
There's also the godoc command which
already does what you want: extracting method definitions and it's documentation. You may look in the
source code to see how godoc is
working or use godoc directly.
This editor written in Go projects has a manageable amount of code,
you may look into it.
The de facto standard approach to this problem is to use nsf's gocode. I have tried it only in Vim - it works very well.
Even though there's ready made support for specific editors, gocode is not editor specific. It's a daemon with a communication protocol. It is thus usable from any program.
I want to open libraries, because currently I want to see the algorithms used for drawing, modify them and implement them in my program. For example: I have tried to create an algorithm on my own for lines. But I failed. And even if I had succeeded, I fear that it might not give the same result as the algorithm in the libraries. And I don't want this to happen. That's why I want to copy the algorithms used for the methods in libraries. And I really hope that this will help me create the application I'm currently working on and with other applications in the future.
I tried to open the libraries with a code editor. But I had troubles finding the libraries- I don't really know where are they placed nor in what files are their codes stored.
How to open a Java library? Or is there a place in the Internet where the code is uploaded?
It sounds like what you want is to get inside the standard Java libraries (so you can see the code for methods like Graphics.drawLine()).
You can download the source files from the same place you got the JDK, if you are on Windows or Linux. For the Mac, see this question. You can even set up Eclipse so that you can debug into that source as if it were your own code.
However, you will probably not find line-drawing code in Java in these libraries - the Graphics implementation will almost certainly use native methods, and may just call existing methods in the OS.
If you are specifically looking for line drawing algorithms, another option would be to look at the Wikipedia page for the Bresenham (aliased) or Wu (antialiased) algorithm.
Edit:
The part of a Graphics2D call that actually puts pixels on the screen is probably inside a system call and therefore the source would not be available.
A java vector graphics library like Batik might have source for some of these algorithms, but probably relies on the Graphics2D calls for most of them. So, you might look for a comprehensive vector graphics library written in a language other than Java, where those graphics calls do not already exist by default.
Alternately, checking the table of contents for a computer graphics book might point you at a variety of algorithms that you could look up on Wikipedia.
For any given library:
Make sure to obey all licenses when using another's code
If you are referring to the Java SDK source code, you can find it here: http://grepcode.com/
If the project is open source, you can usually just get the source from the project website. No problem, though make sure to obey their license.
If the project is NOT open source, well, then you're in a pickle licensing wise, so I do NOT endorse this, however, you would need to use a Java Decompiler such as JD-Gui
As far as what drawing algorithms to use, there are so many different ones (obviously, people have been trying to draw quickly for many many years), your best bet is to figure out exactly what you need to do and then search for that specific need separately. There isn't really a good repository of ALL of them, except maybe wikipedia.
If you are using the libraries they are on your classpath. Check out how to figure out your classpath in whichever IDE you are using and you can find the JARs you depend on. If they are packaged with sources all you need to do it unjar them and look at the sources.
If you don't have access to the sources you can get the code using a Java Decompiler.
If you are trying to look at a standard Java library, see the other answers about getting the source to the JDK.
If you are interested in an open source library (such as something maintained by the Apache project), look on the site of the project for a 'source jar' which you can open with a standard zip utility.
If the library you want is not open source or you cannot find the source for it, you can try to decompile it. If you are using Eclipse, try this decompiler.
i was looking at several lua/objective-c implementations that looked promising for a project i want to create ,but with an exception that i wanted to be able to download the scripts at runtime.Then i found the terms which state :
"An Application may not download or install executable code. Interpreted code may only be used in an Application if all scripts, code and interpreters are packaged in the Application and not downloaded. The only exception to the foregoing is scripts and code downloaded and run by Apple's built-in WebKit framework."
so clearly you cant download any lua scripts at runtime.
If i interpret correctly you can only run javascript files downloaded through UIWebView.
So if i wanted to create a objective-c/javascript bridge through uiwebkit(with stringByEvaluatingJavaScriptFromString and url encodings) ,i dont see anything against apple's term right?do you think it would be an overkill in perfomance?
I have no experience about the performance of executing Javascript through UIWebView, but I suspect the toll is high if you plan to call stringByEvaluatingJavaScriptFromString with fine grained code. On the other hand, nothing keeps you from loading a full HTML in your UIWebView with all the Javascript code that you need, and this approach would certainly ensure better performance.
actually, there is an alternative approach that you can try and follow. It is actually possible to directly embed the WebKit Javascript Engine (Javascript Core) into your app. This approach has already been "approved" by Apple and you can find it described here. (Dominic Szablewski, the creator of the JavaScript game engine Impact, is the guy who accomplished this).
In short, it comes down to compile the Javascript Core as a static library and then link this in your app. If you don't feel like compiling it yourself, at the link I posted you can also find more information as to how you can license the library from Dominic Szablewski. (I am not really suggesting anything at this respect, just summarizing information).
Is it possible to write an extension that runs native, platform-dependent code? I'm an extension-newbie (what a phrase!) :), can you please point me towards good material on this subject? (good keywords to feed to Google are enough)
(I would like to put a GtkMenu in Firefox)
Edit:
I started checking out the Gecko SDK, and it's a rather big subject, and I'm not sure this is what I want.
I'd be happy with a friendly manual (which is not a raw reference, but rather some kind of tutorial on how to make extensions that utilize XPCOM (if that is the way). Good keywords are still appreciated.
Check out the Gecko SDK.
You can use it make portable C++ native code firefox extensions which I believe are XPCOM objects with JavaScript wrappers in the .xpm zip file.
I haven't tried it, but you can go the usual route and write the plugin, I mean extension, in javascript also.
Native Client doesn't quite offer the breadths of API firefox extensions offer, but it's still well worth checking out for your purposes IMHO.
Yes, you can. Witness the Cooliris extension, that makes (heavy) use of your 3D graphics card, and is Windows specific.