core/plugins/org.eclipse.dltk.ui/src/org/eclipse/dltk/ui/browsing/PackagesViewFlatContentProvider.java - dltk/org.eclipse.dltk.core - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2016 IBM Corporation 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:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.dltk.ui.browsing;

 import java.util.ArrayList;
 import java.util.List;

 import org.eclipse.dltk.core.IModelElement;
 import org.eclipse.dltk.core.IModelElementDelta;
 import org.eclipse.dltk.core.IProjectFragment;
 import org.eclipse.dltk.core.IScriptFolder;
 import org.eclipse.dltk.core.IScriptProject;
 import org.eclipse.dltk.core.ModelException;
 import org.eclipse.jface.viewers.IStructuredContentProvider;
 import org.eclipse.jface.viewers.StructuredViewer;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Display;

 /**
  * Table content provider for the hierarchical layout in the packages view.
  * <p>
  * XXX: The standard Java browsing part content provider needs and calls
  * the browsing part/view. This class currently doesn't need to do so
  * but might be required to later.
  * </p>
  */
 class PackagesViewFlatContentProvider extends LogicalPackagesProvider implements IStructuredContentProvider {
 	PackagesViewFlatContentProvider(StructuredViewer viewer) {
 		super(viewer);
 	}

 	/*
 	 * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
 	 */
 	public Object[] getChildren(Object parentElement) {

 		if(parentElement instanceof IModelElement){
 			IModelElement element= (IModelElement) parentElement;

 			int type= element.getElementType();

 			try {
 				switch (type) {
 					case IModelElement.SCRIPT_PROJECT :
 						IScriptProject project= (IScriptProject) element;
 						IScriptFolder[] children= getPackageFragments(project.getScriptFolders());
 						if(isInCompoundState()) {
 							fMapToLogicalPackage.clear();
 							fMapToPackageFragments.clear();
 							return combineSamePackagesIntoLogialPackages(children);
 						} else
 							return children;

 					case IModelElement.PROJECT_FRAGMENT :
 						fMapToLogicalPackage.clear();
 						fMapToPackageFragments.clear();
 						IProjectFragment root= (IProjectFragment) element;
 						return root.getChildren();

 					case IModelElement.SCRIPT_FOLDER :
 						//no children in flat view
 						break;

 					default :
 						//do nothing, empty array returned
 				}
 			} catch (ModelException e) {
 				return NO_CHILDREN;
 			}

 		}
 		return NO_CHILDREN;
 	}

 	/*
 	 * Weeds out packageFragments from external jars
 	 */
 	private IScriptFolder[] getPackageFragments(IScriptFolder[] iPackageFragments) {
 		List<IScriptFolder> list = new ArrayList<IScriptFolder>();
 		for (int i= 0; i < iPackageFragments.length; i++) {
 			IScriptFolder fragment= iPackageFragments[i];
 			IModelElement el= fragment.getParent();
 			if (el instanceof IProjectFragment) {
 				IProjectFragment root= (IProjectFragment) el;
 				if(root.isArchive() && root.isExternal())
 					continue;
 			}
 			list.add(fragment);
 		}
 		return list.toArray(new IScriptFolder[list.size()]);
 	}

 	/*
 	 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
 	 */
 	public Object[] getElements(Object inputElement) {
 		return getChildren(inputElement);
 	}

 	protected void processDelta(IModelElementDelta delta) throws ModelException {

 		int kind= delta.getKind();
 		final IModelElement element= delta.getElement();

 		if (isClassPathChange(delta)) {
 			Object input= fViewer.getInput();
 			if (input != null) {
 				if (fInputIsProject && input.equals(element.getScriptProject())) {
 					postRefresh(input);
 					return;
 				} else if (!fInputIsProject && input.equals(element)) {
 					if (element.exists())
 						postRefresh(input);
 					else
 						postRemove(input);
 					return;
 				}
 			}
 		}

 		if (kind == IModelElementDelta.REMOVED) {
 			Object input= fViewer.getInput();
 			if (input != null && input.equals(element)) {
 					postRemove(input);
 					return;
 			}
 		}

 		if (element instanceof IScriptFolder) {
 			final IScriptFolder frag= (IScriptFolder) element;

 			if (kind == IModelElementDelta.REMOVED) {
 				removeElement(frag);

 			} else if (kind == IModelElementDelta.ADDED) {
 				addElement(frag);

 			} else if (kind == IModelElementDelta.CHANGED) {
 				//just refresh
 				Object toBeRefreshed= element;

 				IScriptFolder pkgFragment= (IScriptFolder) element;
 				LogicalPackage logicalPkg= findLogicalPackage(pkgFragment);
 				//deal with packages that have been filtered and are now visible
 				if (logicalPkg != null)
 					toBeRefreshed= findElementToRefresh(logicalPkg);
 				else
 					toBeRefreshed= findElementToRefresh(pkgFragment);

 				postRefresh(toBeRefreshed);
 			}
 			//in this view there will be no children of PackageFragment to refresh
 			return;
 		}
 		processAffectedChildren(delta);
 	}

 	//test to see if element to be refreshed is being filtered out
 	//and if so refresh the viewers input element (JavaProject or PackageFragmentRoot)
 	private Object findElementToRefresh(IScriptFolder fragment) {
 		if (fViewer.testFindItem(fragment) == null) {
 			if(fInputIsProject)
 				return fragment.getScriptProject();
 			else return fragment.getParent();
 		}
 		return fragment;
 	}

 	//test to see if element to be refreshed is being filtered out
 	//and if so refresh the viewers input element (JavaProject or PackageFragmentRoot)
 	private Object findElementToRefresh(LogicalPackage logicalPackage) {
 		if (fViewer.testFindItem(logicalPackage) == null) {
 			IScriptFolder fragment= logicalPackage.getScriptFolders()[0];
 			return fragment.getScriptProject();
 		}
 		return logicalPackage;
 	}


 	private void processAffectedChildren(IModelElementDelta delta) throws ModelException {
 		IModelElementDelta[] children= delta.getAffectedChildren();
 		for (int i= 0; i < children.length; i++) {
 			IModelElementDelta elementDelta= children[i];
 			processDelta(elementDelta);
 		}
 	}

 	private void postAdd(final Object child) {
 		postRunnable(new Runnable() {
 			public void run() {
 				Control ctrl = fViewer.getControl();
 				if (ctrl != null && !ctrl.isDisposed()) {
 					((TableViewer)fViewer).add(child);
 				}
 			}
 		});
 	}


 	private void postRemove(final Object object) {
 		postRunnable(new Runnable() {
 			public void run() {
 				Control ctrl = fViewer.getControl();
 				if (ctrl != null && !ctrl.isDisposed()) {
 					((TableViewer)fViewer).remove(object);
 				}
 			}
 		});
 	}

 	private void postRunnable(final Runnable r) {
 		Control ctrl= fViewer.getControl();
 		if (ctrl != null && !ctrl.isDisposed()) {
 		//	fBrowsingPart.setProcessSelectionEvents(false);
 			try {
 				Display currentDisplay= Display.getCurrent();
 				if (currentDisplay != null && currentDisplay.equals(ctrl.getDisplay()))
 					ctrl.getDisplay().syncExec(r);
 				else
 					ctrl.getDisplay().asyncExec(r);
 			} finally {
 		//		fBrowsingPart.setProcessSelectionEvents(true);
 			}
 		}
 	}

 	private void removeElement(IScriptFolder frag) {
 		String key= getKey(frag);
 		LogicalPackage lp= (LogicalPackage)fMapToLogicalPackage.get(key);

 		if(lp != null){
 			lp.remove(frag);
 			//if you need to change the LogicalPackage to a PackageFragment
 			if(lp.getScriptFolders().length == 1){
 				IScriptFolder fragment= lp.getScriptFolders()[0];
 				fMapToLogicalPackage.remove(key);
 				fMapToPackageFragments.put(key,fragment);

 				//@Improve: Should I replace this with a refresh of the parent?
 				postRemove(lp);
 				postAdd(fragment);
 			} return;
 		} else {
 			fMapToPackageFragments.remove(key);
 			postRemove(frag);
 		}
 	}


 	private void postRefresh(final Object element) {
 		postRunnable(new Runnable() {
 			public void run() {
 				Control ctrl= fViewer.getControl();
 				if (ctrl != null && !ctrl.isDisposed()) {
 					fViewer.refresh(element);
 				}
 			}
 		});
 	}

 	private void addElement(IScriptFolder frag) {
 		String key= getKey(frag);
 		LogicalPackage lp= (LogicalPackage)fMapToLogicalPackage.get(key);

 		if(lp != null && lp.belongs(frag)){
 			lp.add(frag);
 			return;
 		}

 		IScriptFolder fragment= (IScriptFolder)fMapToPackageFragments.get(key);
 		if(fragment != null){
 			//must create a new LogicalPackage
 			if(!fragment.equals(frag)){
 				lp= new LogicalPackage(fragment);
 				lp.add(frag);
 				fMapToLogicalPackage.put(key, lp);

 				//@Improve: should I replace this with a refresh?
 				postRemove(fragment);
 				postAdd(lp);

 				return;
 			}
 		}

 		else {
 			fMapToPackageFragments.put(key, frag);
 			postAdd(frag);
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2016 IBM Corporation 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:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.dltk.ui.browsing;

	import java.util.ArrayList;
	import java.util.List;

	import org.eclipse.dltk.core.IModelElement;
	import org.eclipse.dltk.core.IModelElementDelta;
	import org.eclipse.dltk.core.IProjectFragment;
	import org.eclipse.dltk.core.IScriptFolder;
	import org.eclipse.dltk.core.IScriptProject;
	import org.eclipse.dltk.core.ModelException;
	import org.eclipse.jface.viewers.IStructuredContentProvider;
	import org.eclipse.jface.viewers.StructuredViewer;
	import org.eclipse.jface.viewers.TableViewer;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Display;

	/**
	* Table content provider for the hierarchical layout in the packages view.
	* <p>
	* XXX: The standard Java browsing part content provider needs and calls
	* the browsing part/view. This class currently doesn't need to do so
	* but might be required to later.
	* </p>
	*/
	class PackagesViewFlatContentProvider extends LogicalPackagesProvider implements IStructuredContentProvider {
	PackagesViewFlatContentProvider(StructuredViewer viewer) {
	super(viewer);
	}

	/*
	* @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
	*/
	public Object[] getChildren(Object parentElement) {

	if(parentElement instanceof IModelElement){
	IModelElement element= (IModelElement) parentElement;

	int type= element.getElementType();

	try {
	switch (type) {
	case IModelElement.SCRIPT_PROJECT :
	IScriptProject project= (IScriptProject) element;
	IScriptFolder[] children= getPackageFragments(project.getScriptFolders());
	if(isInCompoundState()) {
	fMapToLogicalPackage.clear();
	fMapToPackageFragments.clear();
	return combineSamePackagesIntoLogialPackages(children);
	} else
	return children;

	case IModelElement.PROJECT_FRAGMENT :
	fMapToLogicalPackage.clear();
	fMapToPackageFragments.clear();
	IProjectFragment root= (IProjectFragment) element;
	return root.getChildren();

	case IModelElement.SCRIPT_FOLDER :
	//no children in flat view
	break;

	default :
	//do nothing, empty array returned
	}
	} catch (ModelException e) {
	return NO_CHILDREN;
	}

	}
	return NO_CHILDREN;
	}

	/*
	* Weeds out packageFragments from external jars
	*/
	private IScriptFolder[] getPackageFragments(IScriptFolder[] iPackageFragments) {
	List<IScriptFolder> list = new ArrayList<IScriptFolder>();
	for (int i= 0; i < iPackageFragments.length; i++) {
	IScriptFolder fragment= iPackageFragments[i];
	IModelElement el= fragment.getParent();
	if (el instanceof IProjectFragment) {
	IProjectFragment root= (IProjectFragment) el;
	if(root.isArchive() && root.isExternal())
	continue;
	}
	list.add(fragment);
	}
	return list.toArray(new IScriptFolder[list.size()]);
	}

	/*
	* @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
	*/
	public Object[] getElements(Object inputElement) {
	return getChildren(inputElement);
	}

	protected void processDelta(IModelElementDelta delta) throws ModelException {

	int kind= delta.getKind();
	final IModelElement element= delta.getElement();

	if (isClassPathChange(delta)) {
	Object input= fViewer.getInput();
	if (input != null) {
	if (fInputIsProject && input.equals(element.getScriptProject())) {
	postRefresh(input);
	return;
	} else if (!fInputIsProject && input.equals(element)) {
	if (element.exists())
	postRefresh(input);
	else
	postRemove(input);
	return;
	}
	}
	}

	if (kind == IModelElementDelta.REMOVED) {
	Object input= fViewer.getInput();
	if (input != null && input.equals(element)) {
	postRemove(input);
	return;
	}
	}

	if (element instanceof IScriptFolder) {
	final IScriptFolder frag= (IScriptFolder) element;

	if (kind == IModelElementDelta.REMOVED) {
	removeElement(frag);

	} else if (kind == IModelElementDelta.ADDED) {
	addElement(frag);

	} else if (kind == IModelElementDelta.CHANGED) {
	//just refresh
	Object toBeRefreshed= element;

	IScriptFolder pkgFragment= (IScriptFolder) element;
	LogicalPackage logicalPkg= findLogicalPackage(pkgFragment);
	//deal with packages that have been filtered and are now visible
	if (logicalPkg != null)
	toBeRefreshed= findElementToRefresh(logicalPkg);
	else
	toBeRefreshed= findElementToRefresh(pkgFragment);

	postRefresh(toBeRefreshed);
	}
	//in this view there will be no children of PackageFragment to refresh
	return;
	}
	processAffectedChildren(delta);
	}

	//test to see if element to be refreshed is being filtered out
	//and if so refresh the viewers input element (JavaProject or PackageFragmentRoot)
	private Object findElementToRefresh(IScriptFolder fragment) {
	if (fViewer.testFindItem(fragment) == null) {
	if(fInputIsProject)
	return fragment.getScriptProject();
	else return fragment.getParent();
	}
	return fragment;
	}

	//test to see if element to be refreshed is being filtered out
	//and if so refresh the viewers input element (JavaProject or PackageFragmentRoot)
	private Object findElementToRefresh(LogicalPackage logicalPackage) {
	if (fViewer.testFindItem(logicalPackage) == null) {
	IScriptFolder fragment= logicalPackage.getScriptFolders()[0];
	return fragment.getScriptProject();
	}
	return logicalPackage;
	}


	private void processAffectedChildren(IModelElementDelta delta) throws ModelException {
	IModelElementDelta[] children= delta.getAffectedChildren();
	for (int i= 0; i < children.length; i++) {
	IModelElementDelta elementDelta= children[i];
	processDelta(elementDelta);
	}
	}

	private void postAdd(final Object child) {
	postRunnable(new Runnable() {
	public void run() {
	Control ctrl = fViewer.getControl();
	if (ctrl != null && !ctrl.isDisposed()) {
	((TableViewer)fViewer).add(child);
	}
	}
	});
	}


	private void postRemove(final Object object) {
	postRunnable(new Runnable() {
	public void run() {
	Control ctrl = fViewer.getControl();
	if (ctrl != null && !ctrl.isDisposed()) {
	((TableViewer)fViewer).remove(object);
	}
	}
	});
	}

	private void postRunnable(final Runnable r) {
	Control ctrl= fViewer.getControl();
	if (ctrl != null && !ctrl.isDisposed()) {
	// fBrowsingPart.setProcessSelectionEvents(false);
	try {
	Display currentDisplay= Display.getCurrent();
	if (currentDisplay != null && currentDisplay.equals(ctrl.getDisplay()))
	ctrl.getDisplay().syncExec(r);
	else
	ctrl.getDisplay().asyncExec(r);
	} finally {
	// fBrowsingPart.setProcessSelectionEvents(true);
	}
	}
	}

	private void removeElement(IScriptFolder frag) {
	String key= getKey(frag);
	LogicalPackage lp= (LogicalPackage)fMapToLogicalPackage.get(key);

	if(lp != null){
	lp.remove(frag);
	//if you need to change the LogicalPackage to a PackageFragment
	if(lp.getScriptFolders().length == 1){
	IScriptFolder fragment= lp.getScriptFolders()[0];
	fMapToLogicalPackage.remove(key);
	fMapToPackageFragments.put(key,fragment);

	//@Improve: Should I replace this with a refresh of the parent?
	postRemove(lp);
	postAdd(fragment);
	} return;
	} else {
	fMapToPackageFragments.remove(key);
	postRemove(frag);
	}
	}


	private void postRefresh(final Object element) {
	postRunnable(new Runnable() {
	public void run() {
	Control ctrl= fViewer.getControl();
	if (ctrl != null && !ctrl.isDisposed()) {
	fViewer.refresh(element);
	}
	}
	});
	}

	private void addElement(IScriptFolder frag) {
	String key= getKey(frag);
	LogicalPackage lp= (LogicalPackage)fMapToLogicalPackage.get(key);

	if(lp != null && lp.belongs(frag)){
	lp.add(frag);
	return;
	}

	IScriptFolder fragment= (IScriptFolder)fMapToPackageFragments.get(key);
	if(fragment != null){
	//must create a new LogicalPackage
	if(!fragment.equals(frag)){
	lp= new LogicalPackage(fragment);
	lp.add(frag);
	fMapToLogicalPackage.put(key, lp);

	//@Improve: should I replace this with a refresh?
	postRemove(fragment);
	postAdd(lp);

	return;
	}
	}

	else {
	fMapToPackageFragments.put(key, frag);
	postAdd(frag);
	}
	}
	}