I am writing eclipse plugin to add better support for properties files. One of the missing piece is content-assist ... I'd like to show matching properties keys when user starts typing some string and presses content assist key.
For example, when I have property hello = world in one of my properties files, and I start typing format("hel and hit CTRL+SPACE now, I'd like to see available hello property.
My problem is that I cannot find correct extension point to provide custom content assist processor. How can I provide my own content assist processor for text files? I'd like to make it work mainly in Java, JSP and XML files.
I've looked for such an extension point before with no success. As far as I know it's not possible to add new types of content assist to editors in Eclipse in this way.
You can do it by declaring an extension to:
org.eclipse.jdt.ui.javaCompletionProposalComputer
Here is the reference page to start with.
You can find a demo project here
You can create a plug-in project, the option, "plug-in with an editor", there is a small XML language editor with syntax coloring (this class will help you to know the classes for the extension). The content assist is not used, but you can add it looking this FAQs
Syntax coloring http://help.eclipse.org/indigo/index.jsp?topic=%2Forg.eclipse.platform.doc.isv%2Fguide%2Feditors_highlighting.htm
Content Assitant http://help.eclipse.org/indigo/index.jsp?topic=%2Forg.eclipse.platform.doc.isv%2Fguide%2Feditors_contentassist.htm
The only thing that I am trying to find is the add Information like JavaDoc to the proposal for the defined assistant. In the FAQ say something but I really don't understand it.
Hope it helps.
If properties files can follow an EBNF grammar, then you could give Eclipse Xtext a shot
Xtext is a framework for development of textual domain specific languages (DSLs).
Just describe your very own DSL using Xtext's simple EBNF grammar language and the generator will create a parser, an AST-meta model (implemented in EMF) as well as a full-featured Eclipse text editor from that.
alt text http://www.eclipse.org/Xtext/images/screenshot-title.png
The Framework integrates with technology from Eclipse Modeling such as EMF, GMF, M2T and parts of EMFT.
Development with Xtext is optimized for short turn-arounds, so that adding new features to an existing DSL is a matter of minutes. Still sophisticated programming languages can be implemented.
Otherwise, you can find some example of content assist in this thread, or this one (JSDT -- JavaScript)
Looks like IContentProposalProvider may be what I am looking for, but still no extension point.
See this: http://www.vogella.de/articles/RichClientPlatform/article.html#fieldassist
This is not extension based solution, but may still benefit you.
Have a look at
for ideas for the wst xml editor and potentially other types of editors
来源：https://stackoverflow.com/questions/1982348/extension-point-for-providing-custom-content-assist-processors-in-eclipse