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Code Issues Wiki Activity

Bug 257982 - SharedASTJob

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Anton Leherbauer 2008-12-16 07:14:24 +00:00
parent 8ffc518520
commit b63ecc5470
1 changed files with 88 additions and 0 deletions
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core/org.eclipse.cdt.ui/src/org/eclipse/cdt/ui/text/SharedASTJob.java Normal file
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/*******************************************************************************
* Copyright (c) 2008 Wind River Systems, Inc. and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.ui.text;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.ui.PlatformUI;
import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
import org.eclipse.cdt.core.model.ILanguage;
import org.eclipse.cdt.core.model.ITranslationUnit;
import org.eclipse.cdt.ui.CUIPlugin;
import org.eclipse.cdt.internal.core.model.ASTCache.ASTRunnable;
import org.eclipse.cdt.internal.ui.editor.ASTProvider;
/**
* A Job specialized to give access to the shared AST of the currently active editor.
* Clients must implement {@link #runOnAST(ILanguage, IASTTranslationUnit)}.
*
* @since 5.1
*/
public abstract class SharedASTJob extends Job {
/**
* The translation unit to for which to access the AST.
*/
protected final ITranslationUnit fUnit;
/**
* Create a shared AST job for the given translation unit.
*
* @param name the display name of this job
* @param tUnit the translation unit to get the AST for
*/
public SharedASTJob(String name, ITranslationUnit tUnit) {
super(name);
fUnit = tUnit;
}
/**
* Run an operation on the shared AST of the requested translation unit.
* This method will only be called if the requested translation unit is open
* in the currently active editor.
*
* @param lang the associated <code>ILanguage</code> of the translation unit
* @param ast the AST object of the translation unit or <code>null</code>
* @return A <code>Status</code> object reflecting the result of the operation
* @throws CoreException
*/
public abstract IStatus runOnAST(ILanguage lang, IASTTranslationUnit ast) throws CoreException;
@Override
protected final IStatus run(IProgressMonitor monitor) {
ASTProvider provider = CUIPlugin.getDefault().getASTProvider();
if (provider == null) {
return Status.CANCEL_STATUS;
}
return provider.runOnAST(fUnit, ASTProvider.WAIT_ACTIVE_ONLY, monitor, new ASTRunnable() {
public IStatus runOnAST(ILanguage lang, IASTTranslationUnit ast) throws CoreException {
return SharedASTJob.this.runOnAST(lang, ast);
}});
}
@Override
public boolean shouldSchedule() {
return super.shouldSchedule() && PlatformUI.isWorkbenchRunning() && CUIPlugin.getDefault() != null;
}
@Override
public boolean shouldRun() {
return super.shouldRun() && PlatformUI.isWorkbenchRunning() && CUIPlugin.getDefault() != null;
}
}