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/*******************************************************************************
* Copyright (c) 2000, 2004 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.team.internal.ui.synchronize;
import org.eclipse.compare.CompareViewerSwitchingPane;
import org.eclipse.compare.internal.INavigatable;
import org.eclipse.compare.internal.IOpenable;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.widgets.Control;
import org.eclipse.team.internal.ui.synchronize.actions.NavigateAction;
/**
* A navigator that coordinates navigation between several navigable
* objects. This is copied from the compare plugin and enhanced to
* support navigating adaptables.
* <p>
* This navigator can be used as input to the {@link NavigateAction}
* actions and should be passed to the actions via the
* {@link SynchronizePageConfiguration#P_NAVIGATOR}.
* </p>
* @since 3.0
*/
public class PartNavigator implements INavigatable {
private Object[] fPanes;
// Fix for http://dev.eclipse.org/bugs/show_bug.cgi?id=20106
private boolean fNextFirstTime= true;
public PartNavigator(Object[] panes) {
fPanes= panes;
}
public boolean gotoDifference(boolean next) {
// Fix for http://dev.eclipse.org/bugs/show_bug.cgi?id=20106
if (next && fNextFirstTime && mustOpen()) {
fNextFirstTime= false;
openElement();
}
// find most down stream CompareViewerPane
int n= 0;
INavigatable[] navigators= new INavigatable[4];
for (int i= 0; i < fPanes.length; i++) {
navigators[n]= getNavigator(fPanes[i]);
if (navigators[n] != null)
n++;
}
while (n > 0) {
n--;
if (navigators[n].gotoDifference(next)) {
// at end of this navigator
continue;
} else // not at end
return false;
}
return true;
}
private static INavigatable getNavigator(Object p) {
if (p == null)
return null;
Control control = null;
if (p instanceof CompareViewerSwitchingPane) {
CompareViewerSwitchingPane pane = (CompareViewerSwitchingPane) p;
if (pane.isEmpty())
return null;
Viewer viewer = pane.getViewer();
if (viewer == null)
return null;
control = viewer.getControl();
if (control == null)
return null;
Object data = control.getData(INavigatable.NAVIGATOR_PROPERTY);
if (data instanceof INavigatable)
return (INavigatable) data;
} else if(p instanceof IAdaptable) {
return (INavigatable)((IAdaptable)p).getAdapter(INavigatable.class);
}
return null;
}
/*
* Fix for http://dev.eclipse.org/bugs/show_bug.cgi?id=20106
*/
private boolean mustOpen() {
if (fPanes == null || fPanes.length == 0)
return false;
for (int i= 1; i < fPanes.length; i++) {
Object p= fPanes[i];
if (p instanceof CompareViewerSwitchingPane) {
CompareViewerSwitchingPane pane = (CompareViewerSwitchingPane) p;
if (pane != null && pane.getInput() != null)
return false;
}
}
return true;
}
/*
* Fix for http://dev.eclipse.org/bugs/show_bug.cgi?id=20106
*/
private void openElement() {
if (fPanes == null || fPanes.length == 0)
return;
IOpenable openable= getOpenable(fPanes[0]);
if (openable != null) {
openable.openSelected();
}
}
/*
* Fix for http://dev.eclipse.org/bugs/show_bug.cgi?id=20106
*/
private static IOpenable getOpenable(Object p) {
if (p instanceof CompareViewerSwitchingPane) {
CompareViewerSwitchingPane pane = (CompareViewerSwitchingPane) p;
if (pane == null)
return null;
if (pane.isEmpty())
return null;
Viewer viewer = pane.getViewer();
if (viewer == null)
return null;
Control control = viewer.getControl();
if (control == null)
return null;
Object data = control.getData(IOpenable.OPENABLE_PROPERTY);
if (data instanceof IOpenable)
return (IOpenable) data;
}
return null;
}
}
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