--- /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.ui.text.folding;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.LinkedHashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+import net.sourceforge.phpdt.core.ElementChangedEvent;
+import net.sourceforge.phpdt.core.ICompilationUnit;
+import net.sourceforge.phpdt.core.IElementChangedListener;
+import net.sourceforge.phpdt.core.IJavaElement;
+import net.sourceforge.phpdt.core.IJavaElementDelta;
+import net.sourceforge.phpdt.core.IMember;
+import net.sourceforge.phpdt.core.IParent;
+import net.sourceforge.phpdt.core.ISourceRange;
+import net.sourceforge.phpdt.core.ISourceReference;
+import net.sourceforge.phpdt.core.IType;
+import net.sourceforge.phpdt.core.JavaCore;
+import net.sourceforge.phpdt.core.JavaModelException;
+import net.sourceforge.phpdt.core.ToolFactory;
+import net.sourceforge.phpdt.core.compiler.IScanner;
+import net.sourceforge.phpdt.core.compiler.ITerminalSymbols;
+import net.sourceforge.phpdt.core.compiler.InvalidInputException;
+import net.sourceforge.phpdt.internal.compiler.parser.Scanner;
+import net.sourceforge.phpdt.internal.ui.text.DocumentCharacterIterator;
+import net.sourceforge.phpdt.ui.IWorkingCopyManager;
+import net.sourceforge.phpdt.ui.PreferenceConstants;
+import net.sourceforge.phpdt.ui.text.folding.IJavaFoldingStructureProvider;
+import net.sourceforge.phpeclipse.PHPeclipsePlugin;
+import net.sourceforge.phpeclipse.phpeditor.PHPEditor;
+import net.sourceforge.phpeclipse.phpeditor.PHPUnitEditor;
+import net.sourceforge.phpeclipse.ui.WebUI;
+
+import org.eclipse.jface.preference.IPreferenceStore;
+import org.eclipse.jface.text.Assert;
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.Position;
+import org.eclipse.jface.text.Region;
+import org.eclipse.jface.text.source.Annotation;
+import org.eclipse.jface.text.source.IAnnotationModel;
+import org.eclipse.jface.text.source.projection.IProjectionListener;
+import org.eclipse.jface.text.source.projection.IProjectionPosition;
+import org.eclipse.jface.text.source.projection.ProjectionAnnotation;
+import org.eclipse.jface.text.source.projection.ProjectionAnnotationModel;
+import org.eclipse.jface.text.source.projection.ProjectionViewer;
+import org.eclipse.ui.texteditor.IDocumentProvider;
+import org.eclipse.ui.texteditor.ITextEditor;
+
+/**
+ * Updates the projection model of a class file or compilation unit.
+ *
+ * @since 3.0
+ */
+public class DefaultJavaFoldingStructureProvider implements
+ IProjectionListener, IJavaFoldingStructureProvider {
+
+ private static class JavaProjectionAnnotation extends ProjectionAnnotation {
+
+ private IJavaElement fJavaElement;
+
+ private boolean fIsComment;
+
+ public JavaProjectionAnnotation(IJavaElement element,
+ boolean isCollapsed, boolean isComment) {
+ super(isCollapsed);
+ fJavaElement = element;
+ fIsComment = isComment;
+ }
+
+ public IJavaElement getElement() {
+ return fJavaElement;
+ }
+
+ public void setElement(IJavaElement element) {
+ fJavaElement = element;
+ }
+
+ public boolean isComment() {
+ return fIsComment;
+ }
+
+ public void setIsComment(boolean isComment) {
+ fIsComment = isComment;
+ }
+
+ /*
+ * @see java.lang.Object#toString()
+ */
+ public String toString() {
+ return "JavaProjectionAnnotation:\n" + //$NON-NLS-1$
+ "\telement: \t" + fJavaElement.toString() + "\n" + //$NON-NLS-1$ //$NON-NLS-2$
+ "\tcollapsed: \t" + isCollapsed() + "\n" + //$NON-NLS-1$ //$NON-NLS-2$
+ "\tcomment: \t" + fIsComment + "\n"; //$NON-NLS-1$ //$NON-NLS-2$
+ }
+ }
+
+ private static final class Tuple {
+ JavaProjectionAnnotation annotation;
+
+ Position position;
+
+ Tuple(JavaProjectionAnnotation annotation, Position position) {
+ this.annotation = annotation;
+ this.position = position;
+ }
+ }
+
+ private class ElementChangedListener implements IElementChangedListener {
+
+ /*
+ * @see org.eclipse.jdt.core.IElementChangedListener#elementChanged(org.eclipse.jdt.core.ElementChangedEvent)
+ */
+ public void elementChanged(ElementChangedEvent e) {
+ IJavaElementDelta delta = findElement(fInput, e.getDelta());
+ if (delta != null)
+ processDelta(delta);
+ }
+
+ private IJavaElementDelta findElement(IJavaElement target,
+ IJavaElementDelta delta) {
+
+ if (delta == null || target == null)
+ return null;
+
+ IJavaElement element = delta.getElement();
+
+ if (element.getElementType() > IJavaElement.CLASS_FILE)
+ return null;
+
+ if (target.equals(element))
+ return delta;
+
+ IJavaElementDelta[] children = delta.getAffectedChildren();
+
+ for (int i = 0; i < children.length; i++) {
+ IJavaElementDelta d = findElement(target, children[i]);
+ if (d != null)
+ return d;
+ }
+
+ return null;
+ }
+ }
+
+ /**
+ * Projection position that will return two foldable regions: one folding
+ * away the region from after the '/**' to the beginning of the content, the
+ * other from after the first content line until after the comment.
+ *
+ * @since 3.1
+ */
+ private static final class CommentPosition extends Position implements
+ IProjectionPosition {
+ CommentPosition(int offset, int length) {
+ super(offset, length);
+ }
+
+ /*
+ * @see org.eclipse.jface.text.source.projection.IProjectionPosition#computeFoldingRegions(org.eclipse.jface.text.IDocument)
+ */
+ public IRegion[] computeProjectionRegions(IDocument document)
+ throws BadLocationException {
+ DocumentCharacterIterator sequence = new DocumentCharacterIterator(
+ document, offset, offset + length);
+ int prefixEnd = 0;
+ int contentStart = findFirstContent(sequence, prefixEnd);
+
+ int firstLine = document.getLineOfOffset(offset + prefixEnd);
+ int captionLine = document.getLineOfOffset(offset + contentStart);
+ int lastLine = document.getLineOfOffset(offset + length);
+
+ Assert.isTrue(firstLine <= captionLine,
+ "first folded line is greater than the caption line"); //$NON-NLS-1$
+ Assert.isTrue(captionLine <= lastLine,
+ "caption line is greater than the last folded line"); //$NON-NLS-1$
+
+ IRegion preRegion;
+ if (firstLine < captionLine) {
+ // preRegion= new Region(offset + prefixEnd, contentStart -
+ // prefixEnd);
+ int preOffset = document.getLineOffset(firstLine);
+ IRegion preEndLineInfo = document
+ .getLineInformation(captionLine);
+ int preEnd = preEndLineInfo.getOffset();
+ preRegion = new Region(preOffset, preEnd - preOffset);
+ } else {
+ preRegion = null;
+ }
+
+ if (captionLine < lastLine) {
+ int postOffset = document.getLineOffset(captionLine + 1);
+ IRegion postRegion = new Region(postOffset, offset + length
+ - postOffset);
+
+ if (preRegion == null)
+ return new IRegion[] { postRegion };
+
+ return new IRegion[] { preRegion, postRegion };
+ }
+
+ if (preRegion != null)
+ return new IRegion[] { preRegion };
+
+ return null;
+ }
+
+ /**
+ * Finds the offset of the first identifier part within
+ * <code>content</code>. Returns 0 if none is found.
+ *
+ * @param content
+ * the content to search
+ * @return the first index of a unicode identifier part, or zero if none
+ * can be found
+ */
+ private int findFirstContent(final CharSequence content, int prefixEnd) {
+ int lenght = content.length();
+ for (int i = prefixEnd; i < lenght; i++) {
+ if (Character.isUnicodeIdentifierPart(content.charAt(i)))
+ return i;
+ }
+ return 0;
+ }
+
+ // /**
+ // * Finds the offset of the first identifier part within
+ // <code>content</code>.
+ // * Returns 0 if none is found.
+ // *
+ // * @param content the content to search
+ // * @return the first index of a unicode identifier part, or zero if
+ // none
+ // can
+ // * be found
+ // */
+ // private int findPrefixEnd(final CharSequence content) {
+ // // return the index after the leading '/*' or '/**'
+ // int len= content.length();
+ // int i= 0;
+ // while (i < len && isWhiteSpace(content.charAt(i)))
+ // i++;
+ // if (len >= i + 2 && content.charAt(i) == '/' && content.charAt(i + 1)
+ // ==
+ // '*')
+ // if (len >= i + 3 && content.charAt(i + 2) == '*')
+ // return i + 3;
+ // else
+ // return i + 2;
+ // else
+ // return i;
+ // }
+ //
+ // private boolean isWhiteSpace(char c) {
+ // return c == ' ' || c == '\t';
+ // }
+
+ /*
+ * @see org.eclipse.jface.text.source.projection.IProjectionPosition#computeCaptionOffset(org.eclipse.jface.text.IDocument)
+ */
+ public int computeCaptionOffset(IDocument document) {
+ // return 0;
+ DocumentCharacterIterator sequence = new DocumentCharacterIterator(
+ document, offset, offset + length);
+ return findFirstContent(sequence, 0);
+ }
+ }
+
+ /**
+ * Projection position that will return two foldable regions: one folding
+ * away the lines before the one containing the simple name of the java
+ * element, one folding away any lines after the caption.
+ *
+ * @since 3.1
+ */
+ private static final class JavaElementPosition extends Position implements
+ IProjectionPosition {
+
+ private IMember fMember;
+
+ public JavaElementPosition(int offset, int length, IMember member) {
+ super(offset, length);
+ Assert.isNotNull(member);
+ fMember = member;
+ }
+
+ public void setMember(IMember member) {
+ Assert.isNotNull(member);
+ fMember = member;
+ }
+
+ /*
+ * @see org.eclipse.jface.text.source.projection.IProjectionPosition#computeFoldingRegions(org.eclipse.jface.text.IDocument)
+ */
+ public IRegion[] computeProjectionRegions(IDocument document)
+ throws BadLocationException {
+ int nameStart = offset;
+ try {
+ /*
+ * The member's name range may not be correct. However,
+ * reconciling would trigger another element delta which would
+ * lead to reentrant situations. Therefore, we optimistically
+ * assume that the name range is correct, but double check the
+ * received lines below.
+ */
+ ISourceRange nameRange = fMember.getNameRange();
+ if (nameRange != null)
+ nameStart = nameRange.getOffset();
+
+ } catch (JavaModelException e) {
+ // ignore and use default
+ }
+
+ int firstLine = document.getLineOfOffset(offset);
+ int captionLine = document.getLineOfOffset(nameStart);
+ int lastLine = document.getLineOfOffset(offset + length);
+
+ /*
+ * see comment above - adjust the caption line to be inside the
+ * entire folded region, and rely on later element deltas to correct
+ * the name range.
+ */
+ if (captionLine < firstLine)
+ captionLine = firstLine;
+ if (captionLine > lastLine)
+ captionLine = lastLine;
+
+ IRegion preRegion;
+ if (firstLine < captionLine) {
+ int preOffset = document.getLineOffset(firstLine);
+ IRegion preEndLineInfo = document
+ .getLineInformation(captionLine);
+ int preEnd = preEndLineInfo.getOffset();
+ preRegion = new Region(preOffset, preEnd - preOffset);
+ } else {
+ preRegion = null;
+ }
+
+ if (captionLine < lastLine) {
+ int postOffset = document.getLineOffset(captionLine + 1);
+ IRegion postRegion = new Region(postOffset, offset + length
+ - postOffset);
+
+ if (preRegion == null)
+ return new IRegion[] { postRegion };
+
+ return new IRegion[] { preRegion, postRegion };
+ }
+
+ if (preRegion != null)
+ return new IRegion[] { preRegion };
+
+ return null;
+ }
+
+ /*
+ * @see org.eclipse.jface.text.source.projection.IProjectionPosition#computeCaptionOffset(org.eclipse.jface.text.IDocument)
+ */
+ public int computeCaptionOffset(IDocument document)
+ throws BadLocationException {
+ int nameStart = offset;
+ try {
+ // need a reconcile here?
+ ISourceRange nameRange = fMember.getNameRange();
+ if (nameRange != null)
+ nameStart = nameRange.getOffset();
+ } catch (JavaModelException e) {
+ // ignore and use default
+ }
+
+ return nameStart - offset;
+ }
+
+ }
+
+ private IDocument fCachedDocument;
+
+ private ProjectionAnnotationModel fCachedModel;
+
+ private ITextEditor fEditor;
+
+ private ProjectionViewer fViewer;
+
+ private IJavaElement fInput;
+
+ private IElementChangedListener fElementListener;
+
+ private boolean fAllowCollapsing = false;
+
+ private boolean fCollapseJavadoc = false;
+
+ // private boolean fCollapseImportContainer = true;
+
+ private boolean fCollapseInnerTypes = true;
+
+ private boolean fCollapseMethods = false;
+
+ private boolean fCollapseHeaderComments = true;
+
+ /* caches for header comment extraction. */
+ private IType fFirstType;
+
+ private boolean fHasHeaderComment;
+
+ public DefaultJavaFoldingStructureProvider() {
+ }
+
+ public void install(ITextEditor editor, ProjectionViewer viewer) {
+ if (editor instanceof PHPEditor) {
+ fEditor = editor;
+ fViewer = viewer;
+ fViewer.addProjectionListener(this);
+ }
+ }
+
+ public void uninstall() {
+ if (isInstalled()) {
+ projectionDisabled();
+ fViewer.removeProjectionListener(this);
+ fViewer = null;
+ fEditor = null;
+ }
+ }
+
+ protected boolean isInstalled() {
+ return fEditor != null;
+ }
+
+ /*
+ * @see org.eclipse.jface.text.source.projection.IProjectionListener#projectionEnabled()
+ */
+ public void projectionEnabled() {
+ // http://home.ott.oti.com/teams/wswb/anon/out/vms/index.html
+ // projectionEnabled messages are not always paired with
+ // projectionDisabled
+ // i.e. multiple enabled messages may be sent out.
+ // we have to make sure that we disable first when getting an enable
+ // message.
+ projectionDisabled();
+
+ if (fEditor instanceof PHPEditor) {
+ initialize();
+ fElementListener = new ElementChangedListener();
+ JavaCore.addElementChangedListener(fElementListener);
+ }
+ }
+
+ /*
+ * @see org.eclipse.jface.text.source.projection.IProjectionListener#projectionDisabled()
+ */
+ public void projectionDisabled() {
+ fCachedDocument = null;
+ if (fElementListener != null) {
+ JavaCore.removeElementChangedListener(fElementListener);
+ fElementListener = null;
+ }
+ }
+
+ public void initialize() {
+
+ if (!isInstalled())
+ return;
+
+ initializePreferences();
+
+ try {
+
+ IDocumentProvider provider = fEditor.getDocumentProvider();
+ fCachedDocument = provider.getDocument(fEditor.getEditorInput());
+ fAllowCollapsing = true;
+
+ fFirstType = null;
+ fHasHeaderComment = false;
+
+ if (fEditor instanceof PHPUnitEditor) {
+ IWorkingCopyManager manager = WebUI.getDefault()
+ .getWorkingCopyManager();
+ fInput = manager.getWorkingCopy(fEditor.getEditorInput());
+ }
+ // else if (fEditor instanceof ClassFileEditor) {
+ // IClassFileEditorInput editorInput= (IClassFileEditorInput)
+ // fEditor.getEditorInput();
+ // fInput= editorInput.getClassFile();
+ // }
+
+ if (fInput != null) {
+ ProjectionAnnotationModel model = (ProjectionAnnotationModel) fEditor
+ .getAdapter(ProjectionAnnotationModel.class);
+ if (model != null) {
+ fCachedModel = model;
+ if (fInput instanceof ICompilationUnit) {
+ ICompilationUnit unit = (ICompilationUnit) fInput;
+ synchronized (unit) {
+ try {
+ // unit.reconcile(ICompilationUnit.NO_AST,
+ // false, null, null);
+ unit.reconcile();
+ } catch (JavaModelException x) {
+ }
+ }
+ }
+
+ Map additions = computeAdditions((IParent) fInput);
+ /*
+ * Minimize the events being sent out - as this happens in
+ * the UI thread merge everything into one call.
+ */
+ List removals = new LinkedList();
+ Iterator existing = model.getAnnotationIterator();
+ while (existing.hasNext())
+ removals.add(existing.next());
+ model.replaceAnnotations((Annotation[]) removals
+ .toArray(new Annotation[removals.size()]),
+ additions);
+ }
+ }
+
+ } finally {
+ fCachedDocument = null;
+ fCachedModel = null;
+ fAllowCollapsing = false;
+
+ fFirstType = null;
+ fHasHeaderComment = false;
+ }
+ }
+
+ private void initializePreferences() {
+ IPreferenceStore store = WebUI.getDefault()
+ .getPreferenceStore();
+ fCollapseInnerTypes = store
+ .getBoolean(PreferenceConstants.EDITOR_FOLDING_INNERTYPES);
+ // fCollapseImportContainer =
+ // store.getBoolean(PreferenceConstants.EDITOR_FOLDING_IMPORTS);
+ fCollapseJavadoc = store
+ .getBoolean(PreferenceConstants.EDITOR_FOLDING_JAVADOC);
+ fCollapseMethods = store
+ .getBoolean(PreferenceConstants.EDITOR_FOLDING_METHODS);
+ fCollapseHeaderComments = store
+ .getBoolean(PreferenceConstants.EDITOR_FOLDING_HEADERS);
+ }
+
+ private Map computeAdditions(IParent parent) {
+ Map map = new LinkedHashMap(); // use a linked map to maintain ordering
+ // of
+ // comments
+ try {
+ computeAdditions(parent.getChildren(), map);
+ } catch (JavaModelException x) {
+ }
+ return map;
+ }
+
+ private void computeAdditions(IJavaElement[] elements, Map map)
+ throws JavaModelException {
+ for (int i = 0; i < elements.length; i++) {
+ IJavaElement element = elements[i];
+
+ computeAdditions(element, map);
+
+ if (element instanceof IParent) {
+ IParent parent = (IParent) element;
+ computeAdditions(parent.getChildren(), map);
+ }
+ }
+ }
+
+ private void computeAdditions(IJavaElement element, Map map) {
+
+ boolean createProjection = false;
+
+ boolean collapse = false;
+ switch (element.getElementType()) {
+
+ // case IJavaElement.IMPORT_CONTAINER:
+ // collapse = fAllowCollapsing && fCollapseImportContainer;
+ // createProjection = true;
+ // break;
+ case IJavaElement.TYPE:
+ collapse = fAllowCollapsing;
+ if (isInnerType((IType) element)) {
+ collapse = collapse && fCollapseInnerTypes;
+ } else {
+ collapse = false; // don't allow the most outer type to be
+ // folded, may be changed in future versions
+ }
+ createProjection = true;
+ break;
+ case IJavaElement.METHOD:
+ collapse = fAllowCollapsing && fCollapseMethods;
+ createProjection = true;
+ break;
+ }
+
+ if (createProjection) {
+ IRegion[] regions = computeProjectionRanges(element);
+ if (regions != null) {
+ // comments
+ for (int i = 0; i < regions.length - 1; i++) {
+ Position position = createProjectionPosition(regions[i],
+ null);
+ boolean commentCollapse;
+ if (position != null) {
+ if (i == 0 && (regions.length > 2 || fHasHeaderComment)
+ && element == fFirstType) {
+ commentCollapse = fAllowCollapsing
+ && fCollapseHeaderComments;
+ } else {
+ commentCollapse = fAllowCollapsing
+ && fCollapseJavadoc;
+ }
+ map.put(new JavaProjectionAnnotation(element,
+ commentCollapse, true), position);
+ }
+ }
+ // code
+ Position position = createProjectionPosition(
+ regions[regions.length - 1], element);
+ if (position != null)
+ map.put(new JavaProjectionAnnotation(element, collapse,
+ false), position);
+ }
+ }
+ }
+
+ private boolean isInnerType(IType type) {
+
+ try {
+ return type.isMember();
+ } catch (JavaModelException x) {
+ IJavaElement parent = type.getParent();
+ if (parent != null) {
+ int parentType = parent.getElementType();
+ return (parentType != IJavaElement.COMPILATION_UNIT && parentType != IJavaElement.CLASS_FILE);
+ }
+ }
+
+ return false;
+ }
+
+ /**
+ * Computes the projection ranges for a given <code>IJavaElement</code>.
+ * More than one range may be returned if the element has a leading comment
+ * which gets folded separately. If there are no foldable regions,
+ * <code>null</code> is returned.
+ *
+ * @param element
+ * the java element that can be folded
+ * @return the regions to be folded, or <code>null</code> if there are
+ * none
+ */
+ private IRegion[] computeProjectionRanges(IJavaElement element) {
+
+ try {
+ if (element instanceof ISourceReference) {
+ ISourceReference reference = (ISourceReference) element;
+ ISourceRange range = reference.getSourceRange();
+
+ String contents = reference.getSource();
+ if (contents == null)
+ return null;
+
+ List regions = new ArrayList();
+ // now add all comments first to the regions list
+ if (fFirstType == null && element instanceof IType) {
+ fFirstType = (IType) element;
+ IRegion headerComment = computeHeaderComment(fFirstType);
+ if (headerComment != null) {
+ regions.add(headerComment);
+ fHasHeaderComment = true;
+ }
+ }
+
+ final int shift = range.getOffset();
+ int start = shift;
+ if (element instanceof IType) {
+ Scanner scanner = ToolFactory.createScanner(true, false,
+ false, false);
+ scanner.setSource(contents.toCharArray());
+ scanner.setPHPMode(true);
+
+ int token = scanner.getNextToken();
+ while (token != ITerminalSymbols.TokenNameEOF) {
+
+ token = scanner.getNextToken();
+ start = shift + scanner.getCurrentTokenStartPosition();
+
+ switch (token) {
+ case ITerminalSymbols.TokenNameCOMMENT_PHPDOC:
+ case ITerminalSymbols.TokenNameCOMMENT_BLOCK: {
+ int end = shift
+ + scanner.getCurrentTokenEndPosition() + 1;
+ regions.add(new Region(start, end - start));
+ }
+ case ITerminalSymbols.TokenNameCOMMENT_LINE:
+ continue;
+ }
+ }
+ }
+ // at the end add the element region
+ regions.add(new Region(range.getOffset(), range.getLength()));
+
+ if (regions.size() > 0) {
+ IRegion[] result = new IRegion[regions.size()];
+ regions.toArray(result);
+ return result;
+ }
+
+ }
+ } catch (JavaModelException e) {
+ } catch (InvalidInputException e) {
+ }
+
+ return null;
+ }
+
+ private IRegion computeHeaderComment(IType type) throws JavaModelException {
+ if (fCachedDocument == null)
+ return null;
+
+ // search at most up to the first type
+ ISourceRange range = type.getSourceRange();
+ if (range == null)
+ return null;
+ int start = 0;
+ int end = range.getOffset();
+
+ if (fInput instanceof ISourceReference) {
+ String content;
+ try {
+ content = fCachedDocument.get(start, end - start);
+ } catch (BadLocationException e) {
+ return null; // ignore header comment in that case
+ }
+
+ /*
+ * code adapted from CommentFormattingStrategy: scan the header
+ * content up to the first type. Once a comment is found, accumulate
+ * any additional comments up to the stop condition. The stop
+ * condition is reaching a package declaration, import container, or
+ * the end of the input.
+ */
+ IScanner scanner = ToolFactory.createScanner(true, false, false,
+ false);
+ scanner.setSource(content.toCharArray());
+
+ int headerStart = -1;
+ int headerEnd = -1;
+ try {
+ boolean foundComment = false;
+ int terminal = scanner.getNextToken();
+ while (terminal != ITerminalSymbols.TokenNameEOF
+ && !(terminal == ITerminalSymbols.TokenNameclass
+ || terminal == ITerminalSymbols.TokenNameinterface || foundComment)) {
+
+ if (terminal == ITerminalSymbols.TokenNameCOMMENT_PHPDOC
+ || terminal == ITerminalSymbols.TokenNameCOMMENT_BLOCK
+ || terminal == ITerminalSymbols.TokenNameCOMMENT_LINE) {
+ if (!foundComment)
+ headerStart = scanner
+ .getCurrentTokenStartPosition();
+ headerEnd = scanner.getCurrentTokenEndPosition();
+ foundComment = true;
+ }
+ terminal = scanner.getNextToken();
+ }
+
+ } catch (InvalidInputException ex) {
+ return null;
+ }
+
+ if (headerEnd != -1) {
+ return new Region(headerStart, headerEnd - headerStart);
+ }
+ }
+ return null;
+ }
+
+ private Position createProjectionPosition(IRegion region,
+ IJavaElement element) {
+
+ if (fCachedDocument == null)
+ return null;
+
+ try {
+
+ int start = fCachedDocument.getLineOfOffset(region.getOffset());
+ int end = fCachedDocument.getLineOfOffset(region.getOffset()
+ + region.getLength());
+ if (start != end) {
+ int offset = fCachedDocument.getLineOffset(start);
+ int endOffset;
+ if (fCachedDocument.getNumberOfLines() > end + 1)
+ endOffset = fCachedDocument.getLineOffset(end + 1);
+ else if (end > start)
+ endOffset = fCachedDocument.getLineOffset(end)
+ + fCachedDocument.getLineLength(end);
+ else
+ return null;
+ if (element instanceof IMember)
+ return new JavaElementPosition(offset, endOffset - offset,
+ (IMember) element);
+ else
+ return new CommentPosition(offset, endOffset - offset);
+ }
+
+ } catch (BadLocationException x) {
+ }
+
+ return null;
+ }
+
+ protected void processDelta(IJavaElementDelta delta) {
+
+ if (!isInstalled())
+ return;
+
+ if ((delta.getFlags() & (IJavaElementDelta.F_CONTENT | IJavaElementDelta.F_CHILDREN)) == 0)
+ return;
+
+ ProjectionAnnotationModel model = (ProjectionAnnotationModel) fEditor
+ .getAdapter(ProjectionAnnotationModel.class);
+ if (model == null)
+ return;
+
+ try {
+
+ IDocumentProvider provider = fEditor.getDocumentProvider();
+ fCachedDocument = provider.getDocument(fEditor.getEditorInput());
+ fCachedModel = model;
+ fAllowCollapsing = false;
+
+ fFirstType = null;
+ fHasHeaderComment = false;
+
+ Map additions = new HashMap();
+ List deletions = new ArrayList();
+ List updates = new ArrayList();
+
+ Map updated = computeAdditions((IParent) fInput);
+ Map previous = createAnnotationMap(model);
+
+ Iterator e = updated.keySet().iterator();
+ while (e.hasNext()) {
+ JavaProjectionAnnotation newAnnotation = (JavaProjectionAnnotation) e
+ .next();
+//+
+ Position newPosition = (Position) updated.get(newAnnotation);
+ additions.put(newAnnotation, newPosition);
+//-
+// IJavaElement element = newAnnotation.getElement();
+// Position newPosition = (Position) updated.get(newAnnotation);
+//
+// List annotations = (List) previous.get(element);
+// if (annotations == null) {
+//
+// additions.put(newAnnotation, newPosition);
+//
+// } else {
+// Iterator x = annotations.iterator();
+// boolean matched = false;
+// while (x.hasNext()) {
+// Tuple tuple = (Tuple) x.next();
+// JavaProjectionAnnotation existingAnnotation = tuple.annotation;
+// Position existingPosition = tuple.position;
+// if (newAnnotation.isComment() == existingAnnotation
+// .isComment()) {
+// if (existingPosition != null
+// && (!newPosition.equals(existingPosition))) {
+// existingPosition.setOffset(newPosition
+// .getOffset());
+// existingPosition.setLength(newPosition
+// .getLength());
+// updates.add(existingAnnotation);
+// }
+// matched = true;
+// x.remove();
+// break;
+// }
+// }
+// if (!matched)
+// additions.put(newAnnotation, newPosition);
+//
+// if (annotations.isEmpty())
+// previous.remove(element);
+// }
+//-
+ }
+
+ e = previous.values().iterator();
+ while (e.hasNext()) {
+ List list = (List) e.next();
+ int size = list.size();
+ for (int i = 0; i < size; i++)
+ deletions.add(((Tuple) list.get(i)).annotation);
+ }
+
+ match(deletions, additions, updates);
+
+ Annotation[] removals = new Annotation[deletions.size()];
+ deletions.toArray(removals);
+ Annotation[] changes = new Annotation[updates.size()];
+ updates.toArray(changes);
+ model.modifyAnnotations(removals, additions, changes);
+
+ } finally {
+ fCachedDocument = null;
+ fAllowCollapsing = true;
+ fCachedModel = null;
+
+ fFirstType = null;
+ fHasHeaderComment = false;
+ }
+ }
+
+ /**
+ * Matches deleted annotations to changed or added ones. A deleted
+ * annotation/position tuple that has a matching addition / change is
+ * updated and marked as changed. The matching tuple is not added (for
+ * additions) or marked as deletion instead (for changes). The result is
+ * that more annotations are changed and fewer get deleted/re-added.
+ */
+ private void match(List deletions, Map additions, List changes) {
+ if (deletions.isEmpty() || (additions.isEmpty() && changes.isEmpty()))
+ return;
+
+ List newDeletions = new ArrayList();
+ List newChanges = new ArrayList();
+
+ Iterator deletionIterator = deletions.iterator();
+ while (deletionIterator.hasNext()) {
+ JavaProjectionAnnotation deleted = (JavaProjectionAnnotation) deletionIterator
+ .next();
+ Position deletedPosition = fCachedModel.getPosition(deleted);
+ if (deletedPosition == null)
+ continue;
+
+ Tuple deletedTuple = new Tuple(deleted, deletedPosition);
+
+ Tuple match = findMatch(deletedTuple, changes, null);
+ boolean addToDeletions = true;
+ if (match == null) {
+ match = findMatch(deletedTuple, additions.keySet(), additions);
+ addToDeletions = false;
+ }
+
+ if (match != null) {
+ IJavaElement element = match.annotation.getElement();
+ deleted.setElement(element);
+ deletedPosition.setLength(match.position.getLength());
+ if (deletedPosition instanceof JavaElementPosition
+ && element instanceof IMember) {
+ JavaElementPosition jep = (JavaElementPosition) deletedPosition;
+ jep.setMember((IMember) element);
+ }
+
+ deletionIterator.remove();
+ newChanges.add(deleted);
+
+ if (addToDeletions)
+ newDeletions.add(match.annotation);
+ }
+ }
+
+ deletions.addAll(newDeletions);
+ changes.addAll(newChanges);
+ }
+
+ /**
+ * Finds a match for <code>tuple</code> in a collection of annotations.
+ * The positions for the <code>JavaProjectionAnnotation</code> instances
+ * in <code>annotations</code> can be found in the passed
+ * <code>positionMap</code> or <code>fCachedModel</code> if
+ * <code>positionMap</code> is <code>null</code>.
+ * <p>
+ * A tuple is said to match another if their annotations have the same
+ * comment flag and their position offsets are equal.
+ * </p>
+ * <p>
+ * If a match is found, the annotation gets removed from
+ * <code>annotations</code>.
+ * </p>
+ *
+ * @param tuple
+ * the tuple for which we want to find a match
+ * @param annotations
+ * collection of <code>JavaProjectionAnnotation</code>
+ * @param positionMap
+ * a <code>Map<Annotation, Position></code> or
+ * <code>null</code>
+ * @return a matching tuple or <code>null</code> for no match
+ */
+ private Tuple findMatch(Tuple tuple, Collection annotations, Map positionMap) {
+ Iterator it = annotations.iterator();
+ while (it.hasNext()) {
+ JavaProjectionAnnotation annotation = (JavaProjectionAnnotation) it
+ .next();
+ if (tuple.annotation.isComment() == annotation.isComment()) {
+ Position position = positionMap == null ? fCachedModel
+ .getPosition(annotation) : (Position) positionMap
+ .get(annotation);
+ if (position == null)
+ continue;
+
+ if (tuple.position.getOffset() == position.getOffset()) {
+ it.remove();
+ return new Tuple(annotation, position);
+ }
+ }
+ }
+
+ return null;
+ }
+
+ private Map createAnnotationMap(IAnnotationModel model) {
+ Map map = new HashMap();
+ Iterator e = model.getAnnotationIterator();
+ while (e.hasNext()) {
+ Object annotation = e.next();
+ if (annotation instanceof JavaProjectionAnnotation) {
+ JavaProjectionAnnotation java = (JavaProjectionAnnotation) annotation;
+ Position position = model.getPosition(java);
+ Assert.isNotNull(position);
+ List list = (List) map.get(java.getElement());
+ if (list == null) {
+ list = new ArrayList(2);
+ map.put(java.getElement(), list);
+ }
+ list.add(new Tuple(java, position));
+ }
+ }
+
+ Comparator comparator = new Comparator() {
+ public int compare(Object o1, Object o2) {
+ return ((Tuple) o1).position.getOffset()
+ - ((Tuple) o2).position.getOffset();
+ }
+ };
+ for (Iterator it = map.values().iterator(); it.hasNext();) {
+ List list = (List) it.next();
+ Collections.sort(list, comparator);
+ }
+ return map;
+ }
+}
\ No newline at end of file
git://secure.phpeclipse.com / phpeclipse.git / blobdiff