+++ /dev/null
-/*
- * (c) Copyright IBM Corp. 2000, 2001.
- * All Rights Reserved.
- */
-package net.sourceforge.phpdt.internal.corext.textmanipulation;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
-import net.sourceforge.phpdt.internal.corext.textmanipulation.TextEditNode.RootNode;
-
-import org.eclipse.core.runtime.CoreException;
-import org.eclipse.core.runtime.IProgressMonitor;
-import org.eclipse.core.runtime.NullProgressMonitor;
-
-// import net.sourceforge.phpdt.core.IJavaModelStatusConstants;
-// import net.sourceforge.phpdt.core.JavaModelException;
-//
-// import net.sourceforge.phpdt.internal.corext.Assert;
-
-/**
- * A <code>TextBufferEditor</code> manages a set of <code>TextEdit</code>s
- * and applies them as a whole to a <code>TextBuffer</code>. Added
- * <code>TextEdit</code>s must not overlap. The only exception from this rule
- * are insertion point. There can be more than one insert point at the same text
- * position. Clients should use the method <code>
- * canPerformEdits</code> to
- * validate if all added text edits follow these rules.
- * <p>
- * Clients can attach more than one <code>TextBufferEditor</code> to a single
- * <code>
- * TextBuffer</code>. If so <code>canPerformEdits</code> validates
- * all text edits from all text buffer editors working on the same text buffer.
- */
-public class TextBufferEditor {
-
- private TextBuffer fBuffer;
-
- private List fEdits;
-
- private RootNode fRootNode;
-
- private int fNumberOfNodes;
-
- private int fConnectCount;
-
- private int fMode;
-
- /* package */static final int UNDEFINED = 0;
-
- /* package */static final int REDO = 1;
-
- /* package */static final int UNDO = 2;
-
- /**
- * Creates a new <code>TextBufferEditor</code> for the given
- * <code>TextBuffer</code>.
- *
- * @param the
- * text buffer this editor is working on.
- */
- public TextBufferEditor(TextBuffer buffer) {
- fBuffer = buffer;
- // Assert.isNotNull(fBuffer);
- fEdits = new ArrayList();
- }
-
- /**
- * Returns the text buffer this editor is working on.
- *
- * @return the text buffer this editor is working on
- */
- public TextBuffer getTextBuffer() {
- return fBuffer;
- }
-
- /**
- * Adds a <code>TextEdit</code> to this text editor. Adding a
- * <code>TextEdit</code> to a <code>TextBufferEditor</code> transfers
- * ownership of the edit to the editor. So after a edit has been added to a
- * editor the creator of that edit <b>must</b> not continue modifing it.
- *
- * @param edit
- * the text edit to be added
- * @exception CoreException
- * if the text edit can not be added to this text buffer
- * editor
- */
- public void add(TextEdit edit) throws CoreException {
- // Assert.isTrue(fMode == UNDEFINED || fMode == REDO);
- internalAdd(edit);
- fMode = REDO;
- }
-
- /**
- * Adds a <code>MultiTextEdit</code> to this text editor. Adding a
- * <code>MultiTextEdit</code> to a <code>TextBufferEditor</code>
- * transfers ownership of the edit to the editor. So after a edit has been
- * added to a editor the creator of that edit <b>must</b> not continue
- * modifing it.
- *
- * @param edit
- * the multi text edit to be added
- * @exception CoreException
- * if the multi text edit can not be added to this text
- * buffer editor
- */
- public void add(MultiTextEdit edit) throws CoreException {
- // Assert.isTrue(fMode == UNDEFINED || fMode == REDO);
- edit.connect(this);
- fMode = REDO;
- }
-
- /**
- * Adds a <code>UndoMemento</code> to this text editor. Adding a
- * <code>UndoMemento</code> to a <code>TextBufferEditor</code> transfers
- * ownership of the memento to the editor. So after a memento has been added
- * to a editor the creator of that memento <b>must</b> not continue
- * modifing it.
- *
- * @param undo
- * the undo memento to be added
- * @exception CoreException
- * if the undo memento can not be added to this text buffer
- * editor
- */
- public void add(UndoMemento undo) throws CoreException {
- // Assert.isTrue(fMode == UNDEFINED);
- List list = undo.fEdits;
- // Add them reverse since we are adding undos.
- for (int i = list.size() - 1; i >= 0; i--) {
- internalAdd((TextEdit) list.get(i));
- }
- fMode = undo.fMode;
- }
-
- /**
- * Checks if the <code>TextEdit</code> added to this text editor can be
- * executed.
- *
- * @return <code>true</code> if the edits can be executed. Return
- * <code>false
- * </code>otherwise. One major reason why text edits
- * cannot be executed is a wrong offset or length value of a
- * <code>TextEdit</code>.
- */
- public boolean canPerformEdits() {
- if (fRootNode != null)
- return true;
- fRootNode = buildTree();
- if (fRootNode == null)
- return false;
- if (fRootNode.validate(fBuffer.getLength()))
- return true;
-
- fRootNode = null;
- return false;
- }
-
- /**
- * Clears the text buffer editor.
- */
- public void clear() {
- fRootNode = null;
- fMode = UNDEFINED;
- fEdits.clear();
- }
-
- /**
- * Executes the text edits added to this text buffer editor and clears all
- * added text edits.
- *
- * @param pm
- * a progress monitor to report progress or <code>null</code>
- * if no progress is desired.
- * @return an object representing the undo of the executed
- * <code>TextEdit</code>s
- * @exception CoreException
- * if the edits cannot be executed
- */
- public UndoMemento performEdits(IProgressMonitor pm) throws CoreException {
- if (pm == null)
- pm = new NullProgressMonitor();
-
- int size = fEdits.size();
- if (size == 0)
- return new UndoMemento(fMode == UNDO ? REDO : UNDO);
-
- if (fRootNode == null) {
- fRootNode = buildTree();
- if (fRootNode == null || !fRootNode.validate(fBuffer.getLength())) {
- // throw new JavaModelException(null,
- // IJavaModelStatusConstants.NO_ELEMENTS_TO_PROCESS);
- }
- }
- try {
- pm.beginTask("", fNumberOfNodes + 10); //$NON-NLS-1$
- UndoMemento undo = null;
- if (fMode == REDO) {
- undo = fRootNode.performDo(fBuffer, pm);
- fRootNode.performedDo();
- } else {
- undo = fRootNode.performUndo(fBuffer, pm);
- fRootNode.performedUndo();
- }
- pm.worked(10);
- return undo;
- } finally {
- pm.done();
- clear();
- }
- }
-
- // ---- Helper methods
- // ------------------------------------------------------------
-
- private RootNode buildTree() {
- TextEditNode[] nodes = new TextEditNode[fEdits.size()];
- for (int i = fEdits.size() - 1; i >= 0; i--) {
- nodes[i] = TextEditNode.create((TextEdit) fEdits.get(i));
- }
- fNumberOfNodes = nodes.length;
- Arrays.sort(nodes, new TextEditNodeComparator());
- RootNode root = new RootNode(fBuffer.getLength());
- for (int i = 0; i < nodes.length; i++) {
- root.add(nodes[i]);
- }
- return root;
- }
-
- private void internalAdd(TextEdit edit) throws CoreException {
- edit.index = fEdits.size();
- edit.isSynthetic = fConnectCount > 0;
- try {
- fConnectCount++;
- edit.connect(this);
- } finally {
- fConnectCount--;
- }
- fEdits.add(edit);
- }
-}
git://git.phpeclipse.com / phpeclipse.git / blobdiff