X-Git-Url: http://git.phpeclipse.com
diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/core/Buffer.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/core/Buffer.java
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+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/core/Buffer.java
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+/*******************************************************************************
+ * 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.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+
+import net.sourceforge.phpdt.core.BufferChangedEvent;
+import net.sourceforge.phpdt.core.IBuffer;
+import net.sourceforge.phpdt.core.IBufferChangedListener;
+import net.sourceforge.phpdt.core.IJavaModelStatusConstants;
+import net.sourceforge.phpdt.core.IOpenable;
+import net.sourceforge.phpdt.core.JavaModelException;
+
+import org.eclipse.core.resources.IFile;
+import org.eclipse.core.resources.IResource;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.ISafeRunnable;
+import org.eclipse.core.runtime.Platform;
+
+/**
+ * @see IBuffer
+ */
+public class Buffer implements IBuffer {
+ protected IFile file;
+ protected int flags;
+ protected char[] contents;
+ protected ArrayList changeListeners;
+ protected IOpenable owner;
+ protected int gapStart= -1;
+ protected int gapEnd= -1;
+
+ protected Object lock= new Object();
+
+ protected static final int F_HAS_UNSAVED_CHANGES= 1;
+ protected static final int F_IS_READ_ONLY= 2;
+ protected static final int F_IS_CLOSED= 4;
+
+/**
+ * Creates a new buffer on an underlying resource.
+ */
+protected Buffer(IFile file, IOpenable owner, boolean readOnly) {
+ this.file = file;
+ this.owner = owner;
+ if (file == null) {
+ setReadOnly(readOnly);
+ }
+}
+/**
+ * @see IBuffer
+ */
+public void addBufferChangedListener(IBufferChangedListener listener) {
+ if (this.changeListeners == null) {
+ this.changeListeners = new ArrayList(5);
+ }
+ if (!this.changeListeners.contains(listener)) {
+ this.changeListeners.add(listener);
+ }
+}
+/**
+ * Append the text to the actual content, the gap is moved
+ * to the end of the text.
+ */
+public void append(char[] text) {
+ if (!isReadOnly()) {
+ if (text == null || text.length == 0) {
+ return;
+ }
+ int length = getLength();
+ moveAndResizeGap(length, text.length);
+ System.arraycopy(text, 0, this.contents, length, text.length);
+ this.gapStart += text.length;
+ this.flags |= F_HAS_UNSAVED_CHANGES;
+ notifyChanged(new BufferChangedEvent(this, length, 0, new String(text)));
+ }
+}
+/**
+ * Append the text to the actual content, the gap is moved
+ * to the end of the text.
+ */
+public void append(String text) {
+ if (text == null) {
+ return;
+ }
+ this.append(text.toCharArray());
+}
+/**
+ * @see IBuffer
+ */
+public void close() throws IllegalArgumentException {
+ BufferChangedEvent event = null;
+ synchronized (this.lock) {
+ if (isClosed())
+ return;
+ event = new BufferChangedEvent(this, 0, 0, null);
+ this.contents = null;
+ this.flags |= F_IS_CLOSED;
+ }
+ notifyChanged(event); // notify outside of synchronized block
+ this.changeListeners = null;
+}
+/**
+ * @see IBuffer
+ */
+public char getChar(int position) {
+ synchronized (this.lock) {
+ if (position < this.gapStart) {
+ return this.contents[position];
+ }
+ int gapLength = this.gapEnd - this.gapStart;
+ return this.contents[position + gapLength];
+ }
+}
+/**
+ * @see IBuffer
+ */
+public char[] getCharacters() {
+ if (this.contents == null) return null;
+ synchronized (this.lock) {
+ if (this.gapStart < 0) {
+ return this.contents;
+ }
+ int length = this.contents.length;
+ char[] newContents = new char[length - this.gapEnd + this.gapStart];
+ System.arraycopy(this.contents, 0, newContents, 0, this.gapStart);
+ System.arraycopy(this.contents, this.gapEnd, newContents, this.gapStart, length - this.gapEnd);
+ return newContents;
+ }
+}
+/**
+ * @see IBuffer
+ */
+public String getContents() {
+ char[] chars = this.getCharacters();
+ if (chars == null) return null;
+ return new String(chars);
+}
+/**
+ * @see IBuffer
+ */
+public int getLength() {
+ synchronized (this.lock) {
+ int length = this.gapEnd - this.gapStart;
+ return (this.contents.length - length);
+ }
+}
+/**
+ * @see IBuffer
+ */
+public IOpenable getOwner() {
+ return this.owner;
+}
+/**
+ * @see IBuffer
+ */
+public String getText(int offset, int length) {
+ if (this.contents == null)
+ return ""; //$NON-NLS-1$
+ synchronized (this.lock) {
+ if (offset + length < this.gapStart)
+ return new String(this.contents, offset, length);
+ if (this.gapStart < offset) {
+ int gapLength = this.gapEnd - this.gapStart;
+ return new String(this.contents, offset + gapLength, length);
+ }
+ StringBuffer buf = new StringBuffer();
+ buf.append(this.contents, offset, this.gapStart - offset);
+ buf.append(this.contents, this.gapEnd, offset + length - this.gapStart);
+ return buf.toString();
+ }
+}
+/**
+ * @see IBuffer
+ */
+public IResource getUnderlyingResource() {
+ return this.file;
+}
+/**
+ * @see IBuffer
+ */
+public boolean hasUnsavedChanges() {
+ return (this.flags & F_HAS_UNSAVED_CHANGES) != 0;
+}
+/**
+ * @see IBuffer
+ */
+public boolean isClosed() {
+ return (this.flags & F_IS_CLOSED) != 0;
+}
+/**
+ * @see IBuffer
+ */
+public boolean isReadOnly() {
+ if (this.file == null) {
+ return (this.flags & F_IS_READ_ONLY) != 0;
+ } else {
+ return this.file.isReadOnly();
+ }
+}
+/**
+ * Moves the gap to location and adjust its size to the
+ * anticipated change size. The size represents the expected
+ * range of the gap that will be filled after the gap has been moved.
+ * Thus the gap is resized to actual size + the specified size and
+ * moved to the given position.
+ */
+protected void moveAndResizeGap(int position, int size) {
+ char[] content = null;
+ int oldSize = this.gapEnd - this.gapStart;
+ if (size < 0) {
+ if (oldSize > 0) {
+ content = new char[this.contents.length - oldSize];
+ System.arraycopy(this.contents, 0, content, 0, this.gapStart);
+ System.arraycopy(this.contents, this.gapEnd, content, this.gapStart, content.length - this.gapStart);
+ this.contents = content;
+ }
+ this.gapStart = this.gapEnd = position;
+ return;
+ }
+ content = new char[this.contents.length + (size - oldSize)];
+ int newGapStart = position;
+ int newGapEnd = newGapStart + size;
+ if (oldSize == 0) {
+ System.arraycopy(this.contents, 0, content, 0, newGapStart);
+ System.arraycopy(this.contents, newGapStart, content, newGapEnd, content.length - newGapEnd);
+ } else
+ if (newGapStart < this.gapStart) {
+ int delta = this.gapStart - newGapStart;
+ System.arraycopy(this.contents, 0, content, 0, newGapStart);
+ System.arraycopy(this.contents, newGapStart, content, newGapEnd, delta);
+ System.arraycopy(this.contents, this.gapEnd, content, newGapEnd + delta, this.contents.length - this.gapEnd);
+ } else {
+ int delta = newGapStart - this.gapStart;
+ System.arraycopy(this.contents, 0, content, 0, this.gapStart);
+ System.arraycopy(this.contents, this.gapEnd, content, this.gapStart, delta);
+ System.arraycopy(this.contents, this.gapEnd + delta, content, newGapEnd, content.length - newGapEnd);
+ }
+ this.contents = content;
+ this.gapStart = newGapStart;
+ this.gapEnd = newGapEnd;
+}
+/**
+ * Notify the listeners that this buffer has changed.
+ * To avoid deadlock, this should not be called in a synchronized block.
+ */
+protected void notifyChanged(final BufferChangedEvent event) {
+ if (this.changeListeners != null) {
+ for (int i = 0, size = this.changeListeners.size(); i < size; ++i) {
+ final IBufferChangedListener listener = (IBufferChangedListener) this.changeListeners.get(i);
+ Platform.run(new ISafeRunnable() {
+ public void handleException(Throwable exception) {
+ Util.log(exception, "Exception occurred in listener of buffer change notification"); //$NON-NLS-1$
+ }
+ public void run() throws Exception {
+ listener.bufferChanged(event);
+ }
+ });
+
+ }
+ }
+}
+/**
+ * @see IBuffer
+ */
+public void removeBufferChangedListener(IBufferChangedListener listener) {
+ if (this.changeListeners != null) {
+ this.changeListeners.remove(listener);
+ if (this.changeListeners.size() == 0) {
+ this.changeListeners = null;
+ }
+ }
+}
+/**
+ * Replaces length characters starting from position with text.
+ * After that operation, the gap is placed at the end of the
+ * inserted text.
+ */
+public void replace(int position, int length, char[] text) {
+ if (!isReadOnly()) {
+ int textLength = text == null ? 0 : text.length;
+ synchronized (this.lock) {
+ // move gap
+ moveAndResizeGap(position + length, textLength - length);
+
+ // overwrite
+ int min = Math.min(textLength, length);
+ if (min > 0) {
+ System.arraycopy(text, 0, this.contents, position, min);
+ }
+ if (length > textLength) {
+ // enlarge the gap
+ this.gapStart -= length - textLength;
+ } else if (textLength > length) {
+ // shrink gap
+ this.gapStart += textLength - length;
+ System.arraycopy(text, 0, this.contents, position, textLength);
+ }
+ }
+ this.flags |= F_HAS_UNSAVED_CHANGES;
+ String string = null;
+ if (textLength > 0) {
+ string = new String(text);
+ }
+ notifyChanged(new BufferChangedEvent(this, position, length, string));
+ }
+}
+/**
+ * Replaces length characters starting from position with text.
+ * After that operation, the gap is placed at the end of the
+ * inserted text.
+ */
+public void replace(int position, int length, String text) {
+ this.replace(position, length, text == null ? null : text.toCharArray());
+}
+/**
+ * @see IBuffer
+ */
+public void save(IProgressMonitor progress, boolean force) throws JavaModelException {
+
+ // determine if saving is required
+ if (isReadOnly() || this.file == null) {
+ return;
+ }
+ synchronized (this.lock) {
+ if (!hasUnsavedChanges())
+ return;
+
+ // use a platform operation to update the resource contents
+ try {
+// String encoding = ((IJavaElement)this.owner).getJavaProject().getOption(PHPCore.CORE_ENCODING, true);
+ String encoding = null;
+ String contents = this.getContents();
+ if (contents == null) return;
+ byte[] bytes = encoding == null
+ ? contents.getBytes()
+ : contents.getBytes(encoding);
+ ByteArrayInputStream stream = new ByteArrayInputStream(bytes);
+
+ this.file.setContents(
+ stream,
+ force ? IResource.FORCE | IResource.KEEP_HISTORY : IResource.KEEP_HISTORY,
+ null);
+ } catch (IOException e) {
+ throw new JavaModelException(e, IJavaModelStatusConstants.IO_EXCEPTION);
+ } catch (CoreException e) {
+ throw new JavaModelException(e);
+ }
+
+ // the resource no longer has unsaved changes
+ this.flags &= ~ (F_HAS_UNSAVED_CHANGES);
+ }
+}
+/**
+ * @see IBuffer
+ */
+public void setContents(char[] newContents) {
+ // allow special case for first initialization
+ // after creation by buffer factory
+ if (this.contents == null) {
+ this.contents = newContents;
+ this.flags &= ~ (F_HAS_UNSAVED_CHANGES);
+ return;
+ }
+
+ if (!isReadOnly()) {
+ String string = null;
+ if (newContents != null) {
+ string = new String(newContents);
+ }
+ BufferChangedEvent event = new BufferChangedEvent(this, 0, this.getLength(), string);
+ synchronized (this.lock) {
+ this.contents = newContents;
+ this.flags |= F_HAS_UNSAVED_CHANGES;
+ this.gapStart = -1;
+ this.gapEnd = -1;
+ }
+ notifyChanged(event);
+ }
+}
+/**
+ * @see IBuffer
+ */
+public void setContents(String newContents) {
+ this.setContents(newContents.toCharArray());
+}
+/**
+ * Sets this Buffer to be read only.
+ */
+protected void setReadOnly(boolean readOnly) {
+ if (readOnly) {
+ this.flags |= F_IS_READ_ONLY;
+ } else {
+ this.flags &= ~(F_IS_READ_ONLY);
+ }
+}
+public String toString() {
+ StringBuffer buffer = new StringBuffer();
+// buffer.append("Owner: " + ((JavaElement)this.owner).toStringWithAncestors()); //$NON-NLS-1$
+ buffer.append("Owner: " + (this.owner).toString()); //$NON-NLS-1$
+ buffer.append("\nHas unsaved changes: " + this.hasUnsavedChanges()); //$NON-NLS-1$
+ buffer.append("\nIs readonly: " + this.isReadOnly()); //$NON-NLS-1$
+ buffer.append("\nIs closed: " + this.isClosed()); //$NON-NLS-1$
+ buffer.append("\nContents:\n"); //$NON-NLS-1$
+ char[] contents = this.getCharacters();
+ if (contents == null) {
+ buffer.append(""); //$NON-NLS-1$
+ } else {
+ int length = contents.length;
+ for (int i = 0; i < length; i++) {
+ char car = contents[i];
+ switch (car) {
+ case '\n':
+ buffer.append("\\n\n"); //$NON-NLS-1$
+ break;
+ case '\r':
+ if (i < length-1 && this.contents[i+1] == '\n') {
+ buffer.append("\\r\\n\n"); //$NON-NLS-1$
+ i++;
+ } else {
+ buffer.append("\\r\n"); //$NON-NLS-1$
+ }
+ break;
+ default:
+ buffer.append(car);
+ break;
+ }
+ }
+ }
+ return buffer.toString();
+}
+}