/*
* Copyright (c) 2013, the Dart project authors.
*
* Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.eclipse.org/legal/epl-v10.html
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.dart.engine.internal.task;
import com.google.dart.engine.ast.CompilationUnit;
import com.google.dart.engine.context.AnalysisException;
import com.google.dart.engine.element.HtmlElement;
import com.google.dart.engine.error.AnalysisError;
import com.google.dart.engine.html.ast.HtmlScriptTagNode;
import com.google.dart.engine.html.ast.HtmlUnit;
import com.google.dart.engine.html.ast.visitor.RecursiveXmlVisitor;
import com.google.dart.engine.internal.builder.HtmlUnitBuilder;
import com.google.dart.engine.internal.context.InternalAnalysisContext;
import com.google.dart.engine.internal.context.RecordingErrorListener;
import com.google.dart.engine.source.Source;
/**
* Instances of the class {@code ResolveHtmlTask} resolve a specific source as an HTML file.
*/
public class ResolveHtmlTask extends AnalysisTask {
/**
* The source to be resolved.
*/
private Source source;
/**
* The time at which the contents of the source were last modified.
*/
private long modificationTime;
/**
* The HTML unit to be resolved.
*/
private HtmlUnit unit;
/**
* The {@link HtmlUnit} that was resolved by this task.
*/
private HtmlUnit resolvedUnit;
/**
* The element produced by resolving the source.
*/
private HtmlElement element = null;
/**
* The resolution errors that were discovered while resolving the source.
*/
private AnalysisError[] resolutionErrors = AnalysisError.NO_ERRORS;
/**
* Initialize a newly created task to perform analysis within the given context.
*
* @param context the context in which the task is to be performed
* @param source the source to be resolved
* @param modificationTime the time at which the contents of the source were last modified
* @param unit the HTML unit to be resolved
*/
public ResolveHtmlTask(InternalAnalysisContext context, Source source, long modificationTime,
HtmlUnit unit) {
super(context);
this.source = source;
this.modificationTime = modificationTime;
this.unit = unit;
}
@Override
public <E> E accept(AnalysisTaskVisitor<E> visitor) throws AnalysisException {
return visitor.visitResolveHtmlTask(this);
}
public HtmlElement getElement() {
return element;
}
/**
* Return the time at which the contents of the source that was parsed were last modified, or a
* negative value if the task has not yet been performed or if an exception occurred.
*
* @return the time at which the contents of the source that was parsed were last modified
*/
public long getModificationTime() {
return modificationTime;
}
public AnalysisError[] getResolutionErrors() {
return resolutionErrors;
}
/**
* Return the {@link HtmlUnit} that was resolved by this task.
*
* @return the {@link HtmlUnit} that was resolved by this task
*/
public HtmlUnit getResolvedUnit() {
return resolvedUnit;
}
/**
* Return the source that was or is to be resolved.
*
* @return the source was or is to be resolved
*/
public Source getSource() {
return source;
}
@Override
protected String getTaskDescription() {
if (source == null) {
return "resolve as html null source";
}
return "resolve as html " + source.getFullName();
}
@Override
protected void internalPerform() throws AnalysisException {
//
// Build the standard HTML element.
//
HtmlUnitBuilder builder = new HtmlUnitBuilder(getContext());
element = builder.buildHtmlElement(source, modificationTime, unit);
final RecordingErrorListener errorListener = builder.getErrorListener();
//
// Validate the directives
//
unit.accept(new RecursiveXmlVisitor<Void>() {
@Override
public Void visitHtmlScriptTagNode(HtmlScriptTagNode node) {
CompilationUnit script = node.getScript();
if (script != null) {
GenerateDartErrorsTask.validateDirectives(getContext(), source, script, errorListener);
}
return null;
}
});
//
// Record all resolution errors.
//
resolutionErrors = errorListener.getErrorsForSource(source);
//
// Remember the resolved unit.
//
resolvedUnit = unit;
}
}