org.eclipse.compare.internal.CompareEditorInputNavigator Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2006, 2011 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.compare.internal;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.compare.*;
/**
* Supports cross-pane navigation through the differences contained in a {@link CompareEditorInput}
* or a similar type of compare container.
* @see INavigatable
*/
public class CompareEditorInputNavigator extends CompareNavigator {
// Fix for http://dev.eclipse.org/bugs/show_bug.cgi?id=20106
private boolean fNextFirstTime= true;
private Object[] fPanes;
/**
* Create a navigator for navigating the given panes
* @param panes the panes to navigate.
*/
public CompareEditorInputNavigator(Object[] panes) {
fPanes= panes;
}
/**
* Return the set of panes that this navigator is navigating.
* The {@link INavigatable} is obtain from each pane using the
* adaptable mechanism.
* @return the set of panes that this navigator is navigating
*/
public Object[] getPanes() {
return fPanes;
}
@Override
protected INavigatable[] getNavigatables() {
List result = new ArrayList();
Object[] panes = getPanes();
for (int i = 0; i < panes.length; i++) {
Object pane = panes[i];
INavigatable navigator= getNavigator(pane);
if (navigator != null)
result.add(navigator);
}
return (INavigatable[]) result.toArray(new INavigatable[result.size()]);
}
/* (non-Javadoc)
* @see org.eclipse.compare.ICompareNavigator#selectChange(boolean)
*/
@Override
public boolean selectChange(boolean next) {
// Fix for http://dev.eclipse.org/bugs/show_bug.cgi?id=20106
if (next && fNextFirstTime && mustOpen()) {
fNextFirstTime= false;
if (openElement())
return false;
}
return super.selectChange(next);
}
/*
* Fix for http://dev.eclipse.org/bugs/show_bug.cgi?id=20106
*/
private boolean mustOpen() {
Object[] panes = getPanes();
if (panes == null || panes.length == 0)
return false;
for (int i= 1; i < panes.length; i++) {
Object pane= panes[i];
INavigatable nav = getNavigator(pane);
if (nav != null && nav.getInput() != null)
return false;
}
return true;
}
/*
* Fix for http://dev.eclipse.org/bugs/show_bug.cgi?id=20106
*/
private boolean openElement() {
Object[] panes = getPanes();
if (panes == null || panes.length == 0)
return false;
INavigatable nav = getNavigator(panes[0]);
if (nav != null) {
if (!nav.openSelectedChange())
// selected change not opened, open first instead
nav.selectChange(INavigatable.FIRST_CHANGE);
return true;
}
return false;
}
}