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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsISupports.idl"
interface nsIAtom;
interface nsIDOMNode;
interface nsIRDFResource;
/**
* A single result generated from a template query. Each result is identified
* by an id, which must be unique within the set of results produced from a
* query. The result may optionally be identified by an RDF resource.
*
* Generally, the result and its id will be able to uniquely identify a node
* in the source data, such as an RDF or XML node. In other contexts, such as
* a database query, a result would represent a particular record.
*
* A result is expected to only be created by a query processor.
*
* Each result also contains a set of variable bindings. The value for a
* particular variable may be retrieved using the getBindingFor and
* getBindingObjectFor methods.
*/
[scriptable, uuid(ebea0230-36fa-41b7-8e31-760806057965)]
interface nsIXULTemplateResult : nsISupports
{
/**
* True if the result represents a container.
*/
readonly attribute boolean isContainer;
/**
* True if the result represents an empty container.
*/
readonly attribute boolean isEmpty;
/**
* True if the template builder may use this result as the reference point
* for additional recursive processing of the template. The template builder
* will reprocess the template using this result as the reference point and
* generate output content that is expected to be inserted as children of the
* output generated for this result. If false, child content is not
* processed. This property identifies only the default handling and may be
* overriden by syntax used in the template.
*/
readonly attribute boolean mayProcessChildren;
/**
* ID of the result. The DOM element created for this result, if any, will
* have its id attribute set to this value. The id must be unique for a
* query.
*/
readonly attribute AString id;
/**
* Resource for the result, which may be null. If set, the resource uri
* must be the same as the ID property.
*/
readonly attribute nsIRDFResource resource;
/**
* The type of the object. The predefined value 'separator' may be used
* for separators. Other values may be used for application specific
* purposes.
*/
readonly attribute AString type;
/**
* Get the string representation of the value of a variable for this
* result. This string will be used in the action body from a template as
* the replacement text. For instance, if the text ?name appears in an
* attribute within the action body, it will be replaced with the result
* of this method. The question mark is considered part of the variable
* name, thus aVar should be ?name and not simply name.
*
* @param aVar the variable to look up
*
* @return the value for the variable or a null string if it has no value
*/
AString getBindingFor(in nsIAtom aVar);
/**
* Get an object value for a variable such as ?name for this result.
*
* This method may return null for a variable, even if getBindingFor returns
* a non-null value for the same variable. This method is provided as a
* convenience when sorting results.
*
* @param aVar the variable to look up
*
* @return the value for the variable or null if it has no value
*/
nsISupports getBindingObjectFor(in nsIAtom aVar);
/**
* Indicate that a particular rule of a query has matched and that output
* will be generated for it. Both the query as compiled by the query
* processor's compileQuery method and the XUL <rule> element are supplied.
* The query must always be one that was compiled by the query processor
* that created this result. The <rule> element must always be a child of
* the <query> element that was used to compile the query.
*
* @param aQuery the query that matched
* @param aRuleNode the rule node that matched
*/
void ruleMatched(in nsISupports aQuery, in nsIDOMNode aRuleNode);
/**
* Indicate that the output for a result has beeen removed and that the
* result is no longer being used by the builder.
*/
void hasBeenRemoved();
};
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