| /******************************************************************************* |
| * 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 org.eclipse.compare.internal; |
| |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.compare.CompareEditorInput; |
| import org.eclipse.compare.*; |
| |
| /** |
| * Supports cross-pane navigation through differences. |
| * XXX: Design is as it is because the feature had to be added without touching API. |
| */ |
| public class CompareNavigator implements ICompareNavigator { |
| |
| private boolean fLastDirection= true; |
| private CompareViewerSwitchingPane[] fPanes; |
| // Fix for http://dev.eclipse.org/bugs/show_bug.cgi?id=20106 |
| private boolean fNextFirstTime= true; |
| |
| public CompareNavigator(CompareViewerSwitchingPane[] panes) { |
| fPanes= panes; |
| } |
| |
| public CompareViewerSwitchingPane[] getPanes() { |
| return fPanes; |
| } |
| |
| public boolean selectChange(boolean next) { |
| |
| fLastDirection= 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(CompareViewerSwitchingPane pane) { |
| 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(INavigatable.NAVIGATOR_PROPERTY); |
| if (data instanceof INavigatable) |
| return (INavigatable) data; |
| return null; |
| } |
| |
| private static CompareNavigator findNavigator(Control c) { |
| while (c != null && !c.isDisposed()) { // PR 1GEUVV2 |
| Object data= c.getData(); |
| if (data instanceof CompareEditorInput) { |
| CompareEditorInput cei= (CompareEditorInput) data; |
| Object adapter= cei.getAdapter(CompareNavigator.class); |
| if (adapter instanceof CompareNavigator) |
| return (CompareNavigator)adapter; |
| } |
| c= c.getParent(); |
| } |
| return null; |
| } |
| |
| private boolean resetDirection() { |
| boolean last= fLastDirection; |
| fLastDirection= true; |
| return last; |
| } |
| |
| public static boolean getDirection(Control c) { |
| CompareNavigator nav= findNavigator(c); |
| if (nav != null) |
| return nav.resetDirection(); |
| return true; |
| } |
| |
| /* |
| * 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++) { |
| CompareViewerSwitchingPane pane= fPanes[i]; |
| 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(CompareViewerSwitchingPane pane) { |
| 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; |
| } |
| } |