--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2000, 2003 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package net.sourceforge.phpdt.internal.core;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+import net.sourceforge.phpdt.core.IBuffer;
+import net.sourceforge.phpdt.core.ICompilationUnit;
+import net.sourceforge.phpdt.core.IJavaElement;
+import net.sourceforge.phpdt.core.IJavaModelStatusConstants;
+import net.sourceforge.phpdt.core.IRegion;
+import net.sourceforge.phpdt.core.JavaModelException;
+import net.sourceforge.phpdt.core.compiler.CharOperation;
+import net.sourceforge.phpdt.core.jdom.DOMFactory;
+import net.sourceforge.phpdt.core.jdom.IDOMCompilationUnit;
+import net.sourceforge.phpdt.internal.core.jdom.DOMNode;
+import net.sourceforge.phpdt.internal.corext.Assert;
+
+/**
+ * This operation deletes a collection of elements (and
+ * all of their children).
+ * If an element does not exist, it is ignored.
+ *
+ * <p>NOTE: This operation only deletes elements contained within leaf resources -
+ * that is, elements within compilation units. To delete a compilation unit or
+ * a package, etc (which have an actual resource), a DeleteResourcesOperation
+ * should be used.
+ */
+public class DeleteElementsOperation extends MultiOperation {
+ /**
+ * The elements this operation processes grouped by compilation unit
+ * @see processElements(). Keys are compilation units,
+ * values are <code>IRegion</code>s of elements to be processed in each
+ * compilation unit.
+ */
+ protected Map fChildrenToRemove;
+ /**
+ * The <code>DOMFactory</code> used to manipulate the source code of
+ * <code>ICompilationUnit</code>s.
+ */
+ protected DOMFactory fFactory;
+ /**
+ * When executed, this operation will delete the given elements. The elements
+ * to delete cannot be <code>null</code> or empty, and must be contained within a
+ * compilation unit.
+ */
+ public DeleteElementsOperation(IJavaElement[] elementsToDelete, boolean force) {
+ super(elementsToDelete, force);
+ fFactory = new DOMFactory();
+ }
+
+ /**
+ * @see MultiOperation
+ */
+ protected String getMainTaskName() {
+ return Util.bind("operation.deleteElementProgress"); //$NON-NLS-1$
+ }
+ /**
+ * Groups the elements to be processed by their compilation unit.
+ * If parent/child combinations are present, children are
+ * discarded (only the parents are processed). Removes any
+ * duplicates specified in elements to be processed.
+ */
+ protected void groupElements() throws JavaModelException {
+ fChildrenToRemove = new HashMap(1);
+ int uniqueCUs = 0;
+ for (int i = 0, length = fElementsToProcess.length; i < length; i++) {
+ IJavaElement e = fElementsToProcess[i];
+ ICompilationUnit cu = getCompilationUnitFor(e);
+ if (cu == null) {
+ throw new JavaModelException(new JavaModelStatus(JavaModelStatus.READ_ONLY, e));
+ } else {
+ IRegion region = (IRegion) fChildrenToRemove.get(cu);
+ if (region == null) {
+ region = new Region();
+ fChildrenToRemove.put(cu, region);
+ uniqueCUs += 1;
+ }
+ region.add(e);
+ }
+ }
+ fElementsToProcess = new IJavaElement[uniqueCUs];
+ Iterator iter = fChildrenToRemove.keySet().iterator();
+ int i = 0;
+ while (iter.hasNext()) {
+ fElementsToProcess[i++] = (IJavaElement) iter.next();
+ }
+ }
+ /**
+ * Deletes this element from its compilation unit.
+ * @see MultiOperation
+ */
+ protected void processElement(IJavaElement element) throws JavaModelException {
+ ICompilationUnit cu = (ICompilationUnit) element;
+
+ // keep track of the import statements - if all are removed, delete
+ // the import container (and report it in the delta)
+// int numberOfImports = cu.getImports().length;
+
+ IBuffer buffer = cu.getBuffer();
+ if (buffer == null) return;
+ JavaElementDelta delta = new JavaElementDelta(cu);
+ IJavaElement[] cuElements = ((IRegion) fChildrenToRemove.get(cu)).getElements();
+ for (int i = 0, length = cuElements.length; i < length; i++) {
+ IJavaElement e = cuElements[i];
+ if (e.exists()) {
+ char[] contents = buffer.getCharacters();
+ if (contents == null) continue;
+ IDOMCompilationUnit cuDOM = fFactory.createCompilationUnit(contents, cu.getElementName());
+ DOMNode node = (DOMNode)((JavaElement) e).findNode(cuDOM);
+ if (node == null) Assert.isTrue(false, "Failed to locate " + e.getElementName() + " in " + cuDOM.getName()); //$NON-NLS-1$//$NON-NLS-2$
+
+ int startPosition = node.getStartPosition();
+ buffer.replace(startPosition, node.getEndPosition() - startPosition + 1, CharOperation.NO_CHAR);
+ delta.removed(e);
+// if (e.getElementType() == IJavaElement.IMPORT_DECLARATION) {
+// numberOfImports--;
+// if (numberOfImports == 0) {
+// delta.removed(cu.getImportContainer());
+// }
+// }
+ }
+ }
+ if (delta.getAffectedChildren().length > 0) {
+ cu.save(getSubProgressMonitor(1), fForce);
+ if (!cu.isWorkingCopy()) { // if unit is working copy, then save will have already fired the delta
+ addDelta(delta);
+ this.setAttribute(HAS_MODIFIED_RESOURCE_ATTR, TRUE);
+ }
+ }
+ }
+ /**
+ * @see MultiOperation
+ * This method first group the elements by <code>ICompilationUnit</code>,
+ * and then processes the <code>ICompilationUnit</code>.
+ */
+ protected void processElements() throws JavaModelException {
+ groupElements();
+ super.processElements();
+ }
+ /**
+ * @see MultiOperation
+ */
+ protected void verify(IJavaElement element) throws JavaModelException {
+ IJavaElement[] children = ((IRegion) fChildrenToRemove.get(element)).getElements();
+ for (int i = 0; i < children.length; i++) {
+ IJavaElement child = children[i];
+ if (child.getCorrespondingResource() != null)
+ error(IJavaModelStatusConstants.INVALID_ELEMENT_TYPES, child);
+ if (child.isReadOnly())
+ error(IJavaModelStatusConstants.READ_ONLY, child);
+ }
+ }
+}
git://git.phpeclipse.com / phpeclipse.git / blobdiff