orion.core.astprovider
The Editor Context object		orion.edit.command

orion.core.astprovider

The orion.core.astprovider service allows plugins to provide ASTs (<dfn>Abstract Syntax Trees</dfn>) for specific content types.

Service methods

Implementations of orion.core.astprovider must define the following function:

computeAST(astContext)

astContext is an object that contains all of the information needed to compute the AST. The astContext object currently only contains the text argument that contains the entire source from the current editor context.

Service attributes

Implementations of orion.core.astprovider may define the following attributes:

contentType

Array An array of Content Type IDs for which this command is valid.

Examples

The following example is how Orion uses the Esprima parser internally to provide ASTs for JavaScript:

var provider = new orion.PluginProvider();
provider.registerService('orion.core.astprovider', 
   {
       computeAST: function(astContext) {
           var ast = esprima.parse(astContext.text, {
                        loc: true,
			range: true,
			raw: true,
			tokens: true,
			comment: true,
			tolerant: true
		     });
	   if (ast.errors) {
	       ast.errors = ast.errors.map(serialize.serializeError);
	   }
	   return ast;
       }
   }, {
     contentType: ['application/javascript']
  });
provider.connect();

The Editor Context object		orion.edit.command