--- /dev/null
+/*
+ * Copyright (c) 2002-2004 Widespace, OU 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://solareclipse.sourceforge.net/legal/cpl-v10.html
+ *
+ * Contributors:
+ * Igor Malinin - initial contribution
+ *
+ * $Id: MultiViewPartitioner.java,v 1.1 2004-09-02 18:26:29 jsurfer Exp $
+ */
+
+package net.sourceforge.phpeclipse.ui.text.rules;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.jface.text.Assert;
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.DocumentEvent;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IDocumentPartitioner;
+import org.eclipse.jface.text.IDocumentPartitioningListener;
+import org.eclipse.jface.text.IDocumentPartitioningListenerExtension;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ITypedRegion;
+import org.eclipse.jface.text.TypedRegion;
+import org.eclipse.jface.text.rules.IPartitionTokenScanner;
+
+/**
+ * Advanced partitioner which maintains partitions as views to connected document. Views have own partitioners themselves. This
+ * class is designed as a base for complex partitioners such as for JSP, PHP, ASP, etc. languages.
+ *
+ * @author Igor Malinin
+ */
+public abstract class MultiViewPartitioner extends AbstractPartitioner {
+
+ class ViewListener implements IDocumentPartitioningListener, IDocumentPartitioningListenerExtension {
+
+ /*
+ * @see org.eclipse.jface.text.IDocumentPartitioningListener#documentPartitioningChanged(IDocument)
+ */
+ public void documentPartitioningChanged(IDocument document) {
+ IDocumentView view = (IDocumentView) document;
+
+ int start = view.getParentOffset(0);
+ int end = view.getParentOffset(view.getLength());
+
+ rememberRegion(start, end - start);
+ }
+
+ /*
+ * @see org.eclipse.jface.text.IDocumentPartitioningListenerExtension#documentPartitioningChanged(IDocument, IRegion)
+ */
+ public void documentPartitioningChanged(IDocument document, IRegion region) {
+ IDocumentView view = (IDocumentView) document;
+
+ int offset = region.getOffset();
+
+ int start = view.getParentOffset(offset);
+ int end = view.getParentOffset(offset + region.getLength());
+
+ rememberRegion(start, end - start);
+ }
+ }
+
+ private ViewListener viewListener = new ViewListener();
+
+ private OuterDocumentView outerDocument;
+
+ private DocumentEvent outerDocumentEvent;
+
+ public MultiViewPartitioner(IPartitionTokenScanner scanner) {
+ super(scanner);
+ }
+
+ public void setOuterPartitioner(IDocumentPartitioner partitioner) {
+ if (outerDocument == null) {
+ if (partitioner == null) {
+ return;
+ }
+
+ outerDocument = new OuterDocumentView(document, nodes);
+ outerDocument.addDocumentPartitioningListener(viewListener);
+ }
+
+ IDocumentPartitioner old = outerDocument.getDocumentPartitioner();
+ if (old != null) {
+ outerDocument.setDocumentPartitioner(null);
+ old.disconnect();
+ }
+
+ if (partitioner != null) {
+ partitioner.connect(outerDocument);
+ }
+
+ outerDocument.setDocumentPartitioner(partitioner);
+
+ if (partitioner == null) {
+ outerDocument.removeDocumentPartitioningListener(viewListener);
+ outerDocument = null;
+ }
+ }
+
+ /**
+ * Create subpartitioner.
+ *
+ * @param contentType
+ * name of inner partition or <code>null</code> for outer partition
+ */
+ protected abstract IDocumentPartitioner createPartitioner(String contentType);
+
+ protected void addInnerRegion(FlatNode position) {
+ if (outerDocument != null) {
+ if (DEBUG) {
+ Assert.isTrue(position.offset >= 0, Integer.toString(position.offset));
+ }
+ DocumentEvent event = new DocumentEvent(outerDocument, outerDocument.getLocalOffset(position.offset), position.length, null);
+
+ outerDocument.fireDocumentAboutToBeChanged(event);
+ super.addInnerRegion(position);
+ outerDocument.fireDocumentChanged(event);
+ } else {
+ super.addInnerRegion(position);
+ }
+
+ if (position instanceof ViewNode) {
+ // TODO: revisit condition
+ IDocumentPartitioner partitioner = createPartitioner(position.type);
+ if (partitioner != null) {
+ InnerDocumentView innerDocument = new InnerDocumentView(document, (ViewNode) position);
+
+ ((ViewNode) position).view = innerDocument;
+
+ partitioner.connect(innerDocument);
+ innerDocument.setDocumentPartitioner(partitioner);
+ innerDocument.addDocumentPartitioningListener(viewListener);
+ }
+ }
+ }
+
+ protected void removeInnerRegion(FlatNode position) {
+ try {
+ if (outerDocument != null) {
+ DocumentEvent event = null;
+ if (position.offset >= 0) {
+ event = new DocumentEvent(outerDocument, outerDocument.getLocalOffset(position.offset), 0, document.get(position.offset,
+ position.length));
+
+ outerDocument.fireDocumentAboutToBeChanged(event);
+ }
+ super.removeInnerRegion(position);
+ if (position.offset >= 0) {
+ outerDocument.fireDocumentChanged(event);
+ }
+ } else {
+ super.removeInnerRegion(position);
+ }
+
+ if (position instanceof ViewNode) {
+ // TODO: revisit condition
+ InnerDocumentView innerDocument = ((ViewNode) position).view;
+ if (innerDocument != null) {
+ IDocumentPartitioner partitioner = innerDocument.getDocumentPartitioner();
+
+ innerDocument.removeDocumentPartitioningListener(viewListener);
+ innerDocument.setDocumentPartitioner(null);
+ partitioner.disconnect();
+ }
+ }
+ } catch (BadLocationException e) {
+ }
+ }
+
+ protected void deleteInnerRegion(FlatNode position) {
+ super.deleteInnerRegion(position);
+
+ if (position instanceof ViewNode) {
+ // TODO: revisit condition
+ InnerDocumentView innerDocument = ((ViewNode) position).view;
+ if (innerDocument != null) {
+ IDocumentPartitioner partitioner = innerDocument.getDocumentPartitioner();
+
+ innerDocument.removeDocumentPartitioningListener(viewListener);
+ innerDocument.setDocumentPartitioner(null);
+ partitioner.disconnect();
+ }
+ }
+ }
+
+ public void connect(IDocument document) {
+ // outerDocument = new OuterDocumentView(document, innerPositions);
+
+ super.connect(document);
+
+ setOuterPartitioner(createPartitioner(null));
+ // IDocumentPartitioner partitioner =
+ // partitioner.connect(outerDocument);
+ // outerDocument.setDocumentPartitioner(partitioner);
+ // outerDocument.addDocumentPartitioningListener(viewListener);
+ }
+
+ public void disconnect() {
+ try {
+ if (outerDocument != null) {
+ outerDocument.removeDocumentPartitioningListener(viewListener);
+
+ IDocumentPartitioner partitioner = outerDocument.getDocumentPartitioner();
+
+ outerDocument.setDocumentPartitioner(null);
+ partitioner.disconnect();
+ }
+ } finally {
+ // TODO: cleanup listeners
+ outerDocument = null;
+ }
+ }
+
+ /*
+ * @see org.eclipse.jface.text.IDocumentPartitioner#documentAboutToBeChanged(DocumentEvent)
+ */
+ public void documentAboutToBeChanged(DocumentEvent event) {
+ super.documentAboutToBeChanged(event);
+
+ outerDocumentEvent = null;
+
+ int offset = event.getOffset();
+ int length = event.getLength();
+ int end = offset + length;
+
+ // find left partition
+ int first = computeFlatNodeIndex(offset);
+ if (first > 0) {
+ FlatNode p = (FlatNode) nodes.get(first - 1);
+
+ int right = p.offset + p.length;
+ if (offset < right) {
+ // change overlaps with partition
+ InnerDocumentView innerDocument = null;
+ if (p instanceof ViewNode) {
+ // TODO: revisit condition
+ innerDocument = ((ViewNode) p).view;
+ }
+
+ if (end < right) {
+ if (innerDocument != null) {
+ // cahnge completely inside partition
+ int start = innerDocument.getLocalOffset(offset);
+ innerDocument.fireDocumentAboutToBeChanged(new DocumentEvent(innerDocument, start, length, event.getText()));
+ }
+
+ return;
+ }
+
+ if (innerDocument != null) {
+ // cut partition at right
+ int start = innerDocument.getLocalOffset(offset);
+ innerDocument.fireDocumentAboutToBeChanged(new DocumentEvent(innerDocument, start, innerDocument.getLength() - start,
+ null));
+ }
+ }
+ }
+
+ // find right partition
+ int last = computeFlatNodeIndex(end);
+ if (last > 0) {
+ FlatNode p = (FlatNode) nodes.get(last - 1);
+
+ if (p instanceof ViewNode) {
+ // TODO: revisit condition
+ InnerDocumentView innerDocument = ((ViewNode) p).view;
+ if (innerDocument != null) {
+ int right = p.offset + p.length;
+ if (end < right) {
+ // cut partition at left
+ int cut = innerDocument.getLocalOffset(end);
+ innerDocument.fireDocumentAboutToBeChanged(new DocumentEvent(innerDocument, 0, cut, null));
+ }
+ }
+ }
+ }
+
+ if (outerDocument != null) {
+ int left = outerDocument.getLocalOffset(offset);
+ int right = outerDocument.getLocalOffset(end);
+
+ String text = event.getText();
+
+ if (left != right || text != null && text.length() > 0) {
+ outerDocumentEvent = new DocumentEvent(outerDocument, left, right - left, text);
+
+ outerDocument.fireDocumentAboutToBeChanged(outerDocumentEvent);
+ }
+ }
+ }
+
+ protected int fixupPartitions(DocumentEvent event) {
+ int offset = event.getOffset();
+ int length = event.getLength();
+ int end = offset + length;
+
+ // fixup/notify inner views laying on change boundaries
+
+ int first = computeFlatNodeIndex(offset);
+ if (first > 0) {
+ FlatNode p = (FlatNode) nodes.get(first - 1);
+
+ int right = p.offset + p.length;
+ if (offset < right) {
+ // change overlaps with partition
+ if (end < right) {
+ // cahnge completely inside partition
+ String text = event.getText();
+ p.length -= length;
+ if (text != null) {
+ p.length += text.length();
+ }
+
+ if (p instanceof ViewNode) {
+ // TODO: revisit condition
+ InnerDocumentView innerDocument = ((ViewNode) p).view;
+ if (innerDocument != null) {
+ int start = innerDocument.getLocalOffset(offset);
+ innerDocument.fireDocumentChanged(new DocumentEvent(innerDocument, start, length, text));
+ }
+ }
+ } else {
+ // cut partition at right
+ int cut = p.offset + p.length - offset;
+ p.length -= cut;
+
+ if (p instanceof ViewNode) {
+ // TODO: revisit condition
+ InnerDocumentView innerDocument = ((ViewNode) p).view;
+ if (innerDocument != null) {
+ int start = innerDocument.getLocalOffset(offset);
+ // TODO: ???fireDocumentAboutToBeChanged???
+ innerDocument.fireDocumentChanged(new DocumentEvent(innerDocument, start, cut, null));
+ }
+ }
+ }
+ }
+ }
+
+ int last = computeFlatNodeIndex(end);
+ if (last > 0 && first != last) {
+ FlatNode p = (FlatNode) nodes.get(last - 1);
+
+ int right = p.offset + p.length;
+ if (end < right) {
+ // cut partition at left
+ int cut = end - p.offset;
+ p.length -= cut;
+ p.offset = offset;
+
+ String text = event.getText();
+ if (text != null) {
+ p.offset += text.length();
+ }
+
+ if (p instanceof ViewNode) {
+ // TODO: revisit condition
+ InnerDocumentView innerDocument = ((ViewNode) p).view;
+ if (innerDocument != null) {
+ // TODO: ???fireDocumentAboutToBeChanged???
+ innerDocument.fireDocumentChanged(new DocumentEvent(innerDocument, 0, cut, null));
+ }
+ }
+
+ --last;
+ }
+ }
+
+ // fixup inner views laying afrer change
+
+ String text = event.getText();
+ if (text != null) {
+ length -= text.length();
+ }
+
+ for (int i = last, size = nodes.size(); i < size; i++) {
+ ((FlatNode) nodes.get(i)).offset -= length;
+ }
+
+ // delete inner views laying completely inside change boundaries
+
+ if (first < last) {
+ do {
+ deleteInnerRegion((FlatNode) nodes.get(--last));
+ } while (first < last);
+
+ rememberRegion(offset, 0);
+ }
+
+ // notify outer view
+
+ if (outerDocumentEvent != null) {
+ outerDocument.fireDocumentChanged(outerDocumentEvent);
+ }
+
+ return first;
+ }
+
+ /*
+ * @see org.eclipse.jface.text.IDocumentPartitioner#computePartitioning(int, int)
+ */
+ protected String getContentType(String parent, String view) {
+ if (view != null) {
+ return view;
+ }
+
+ if (parent != null) {
+ return parent;
+ }
+
+ return IDocument.DEFAULT_CONTENT_TYPE;
+ }
+
+ /*
+ * @see org.eclipse.jface.text.IDocumentPartitioner#computePartitioning(int, int)
+ */
+ public ITypedRegion[] computePartitioning(int offset, int length) {
+ List list = new ArrayList();
+
+ int end = offset + length;
+
+ int index = computeFlatNodeIndex(offset);
+ while (true) {
+ FlatNode prev = (index > 0) ? (FlatNode) nodes.get(index - 1) : null;
+
+ if (prev != null) {
+ if (prev.overlapsWith(offset, length)) {
+ addInnerPartitions(list, offset, length, prev);
+ }
+
+ if (end <= prev.offset + prev.length) {
+ break;
+ }
+ }
+
+ FlatNode next = (index < nodes.size()) ? (FlatNode) nodes.get(index) : null;
+
+ if (next == null || offset < next.offset) {
+ addOuterPartitions(list, offset, length, prev, next);
+ }
+
+ if (next == null) {
+ break;
+ }
+
+ ++index;
+ }
+
+ return (TypedRegion[]) list.toArray(new TypedRegion[list.size()]);
+ }
+
+ private void addOuterPartitions(List list, int offset, int length, FlatNode prev, FlatNode next) {
+ // limit region
+ int start = offset;
+ int end = offset + length;
+
+ if (prev != null && start < prev.offset + prev.length) {
+ start = prev.offset + prev.length;
+ }
+
+ if (next != null && next.offset < end) {
+ end = next.offset;
+ }
+
+ if (start == end) {
+ return;
+ }
+
+ if (outerDocument == null) {
+ list.add(new TypedRegion(start, end - start, getContentType(null, IDocument.DEFAULT_CONTENT_TYPE)));
+ return;
+ }
+
+ try {
+ // convert to outer offsets
+ start = outerDocument.getLocalOffset(start);
+ end = outerDocument.getLocalOffset(end);
+ if (end - start >= 0) {//jsurfer insert line
+ ITypedRegion[] regions = outerDocument.computePartitioning(start, end - start);
+
+ for (int i = 0; i < regions.length; i++) {
+ ITypedRegion region = regions[i];
+
+ // convert back to parent offsets
+ start = outerDocument.getParentOffset(region.getOffset());
+ end = start + region.getLength();
+
+ if (prev != null) {
+ offset = prev.offset + prev.length;
+ if (start < offset) {
+ start = offset;
+ }
+ }
+
+ if (next != null) {
+ offset = next.offset;
+ if (offset < end) {
+ end = offset;
+ }
+ }
+
+ list.add(new TypedRegion(start, end - start, getContentType(null, region.getType())));
+ }
+ }
+ } catch (BadLocationException x) {
+ }
+ }
+
+ private void addInnerPartitions(List list, int offset, int length, FlatNode position) {
+ InnerDocumentView innerDocument = null;
+ if (position instanceof ViewNode) {
+ // TODO: revisit condition
+ innerDocument = ((ViewNode) position).view;
+ }
+
+ if (innerDocument == null) {
+ // simple partition
+ list.add(new TypedRegion(position.offset, position.length, getContentType(position.type, null)));
+ return;
+ }
+
+ // multiplexing to inner view
+ try {
+ // limit region
+ int start = Math.max(offset, position.offset);
+ int end = Math.min(offset + length, position.offset + position.length);
+
+ // convert to document offsets
+ length = end - start;
+ offset = innerDocument.getLocalOffset(start);
+
+ ITypedRegion[] regions = innerDocument.computePartitioning(offset, length);
+
+ for (int i = 0; i < regions.length; i++) {
+ ITypedRegion region = regions[i];
+
+ // convert back to parent offsets
+ offset = innerDocument.getParentOffset(region.getOffset());
+ length = region.getLength();
+
+ list.add(new TypedRegion(offset, length, getContentType(position.type, region.getType())));
+ }
+ } catch (BadLocationException x) {
+ }
+ }
+
+ /*
+ * @see org.eclipse.jface.text.IDocumentPartitioner#getPartition(int)
+ */
+ public ITypedRegion getPartition(int offset) {
+ if (nodes.size() == 0) {
+ return getOuterPartition(offset, null, null);
+ }
+
+ int index = computeFlatNodeIndex(offset);
+ if (index < nodes.size()) {
+ FlatNode next = (FlatNode) nodes.get(index);
+
+ if (offset == next.offset) {
+ return getInnerPartition(offset, next);
+ }
+
+ if (index == 0) {
+ return getOuterPartition(offset, null, next);
+ }
+
+ FlatNode prev = (FlatNode) nodes.get(index - 1);
+
+ if (prev.includes(offset)) {
+ return getInnerPartition(offset, prev);
+ }
+
+ return getOuterPartition(offset, prev, next);
+ }
+
+ FlatNode prev = (FlatNode) nodes.get(nodes.size() - 1);
+
+ if (prev.includes(offset)) {
+ return getInnerPartition(offset, prev);
+ }
+
+ return getOuterPartition(offset, prev, null);
+ }
+
+ protected ITypedRegion getOuterPartition(int offset, FlatNode prev, FlatNode next) {
+ try {
+ int start, end;
+ String type;
+
+ if (outerDocument == null) {
+ start = 0;
+ end = document.getLength();
+ type = getContentType(null, IDocument.DEFAULT_CONTENT_TYPE);
+ } else {
+ ITypedRegion region = outerDocument.getPartition(outerDocument.getLocalOffset(offset));
+
+ start = region.getOffset();
+ end = start + region.getLength();
+
+ // convert to parent offset
+ start = outerDocument.getParentOffset(start);
+ end = outerDocument.getParentOffset(end);
+
+ type = getContentType(null, region.getType());
+ }
+
+ if (prev != null) {
+ offset = prev.offset + prev.length;
+ if (start < offset) {
+ start = offset;
+ }
+ }
+
+ if (next != null) {
+ offset = next.offset;
+ if (offset < end) {
+ end = offset;
+ }
+ }
+
+ return new TypedRegion(start, end - start, type);
+ } catch (BadLocationException x) {
+ throw new IllegalArgumentException();
+ }
+ }
+
+ protected ITypedRegion getInnerPartition(int offset, FlatNode position) {
+ if (position instanceof ViewNode) {
+ // TODO: revisit condition
+ InnerDocumentView innerDocument = ((ViewNode) position).view;
+
+ if (innerDocument != null) {
+ // multiplexing to inner view
+ try {
+ // convert to inner offset
+ ITypedRegion region = innerDocument.getPartition(innerDocument.getLocalOffset(offset));
+
+ // convert to parent offset
+ offset = innerDocument.getParentOffset(region.getOffset());
+
+ return new TypedRegion(offset, region.getLength(), getContentType(position.type, region.getType()));
+ } catch (BadLocationException x) {
+ }
+ }
+ }
+
+ // simple partition
+ return new TypedRegion(position.offset, position.length, position.type);
+ }
+}
\ No newline at end of file
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