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/*****************************************************************************
* Copyright (c) 2014 Montages AG, CEA, 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:
* Montages AG - Initial API and implementation
* Christian W. Damus (CEA) - bug 437217
*
*****************************************************************************/
package org.eclipse.papyrus.editor;
import org.eclipse.gef.ui.views.palette.PaletteView;
import org.eclipse.papyrus.infra.core.sasheditor.editor.IEditorPage;
import org.eclipse.papyrus.infra.core.sasheditor.editor.IPage;
import org.eclipse.papyrus.infra.core.sasheditor.editor.IPageChangedListener;
import org.eclipse.papyrus.infra.core.sasheditor.internal.ActivePageTracker.IActiveEditorChangedListener;
import org.eclipse.papyrus.infra.core.sasheditor.internal.PagePart;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPage;
/**
* Synchronizes the detached palette view with the contents provided by the active inner editor
*/
/* package */class PapyrusPaletteSynchronizer implements IActiveEditorChangedListener, IPageChangedListener {
private final PapyrusMultiDiagramEditor myMultiDiagramEditor;
private IEditorPart myLastActivePart;
public PapyrusPaletteSynchronizer(PapyrusMultiDiagramEditor multiEditor) {
myMultiDiagramEditor = multiEditor;
// Handle the initial page selection
synchronizePaletteView(multiEditor.getISashWindowsContainer().getActiveSashWindowsPage());
}
@Override
public void activeEditorChanged(PagePart oldEditor, PagePart newEditor) {
synchronizePaletteView(newEditor);
}
@Override
public void pageChanged(IPage newPage) {
synchronizePaletteView(newPage);
}
/**
* If {@link PaletteView} is available, synchronizes it with the content provided by active
* inner page
*
* @param activePage
* inner page to synchronize palette view with
*/
private void synchronizePaletteView(IPage activePage) {
PaletteView paletteView = findPaletteView();
if (paletteView == null) {
return;
}
// IEditorPage is not granted, it may be, e.g ErrorComponentPart
IEditorPart activePart = activePage instanceof IEditorPage ? ((IEditorPage) activePage).getIEditorPart() : null;
if (activePart == myLastActivePart) {
return;
}
if (activePart == null) {
paletteView.partClosed(myLastActivePart);
} else {
// multi-editor may be activated outside of this code
// and palette view may already remember its (now outdated) palette
// sending partClosed will enforce palette view to request fresh version
paletteView.partClosed(myMultiDiagramEditor);
paletteView.partActivated(activePart);
}
myLastActivePart = activePart;
}
/**
* Called when host editor is disposed, cleans up
*/
public void dispose() {
PaletteView paletteView = findPaletteView();
if (paletteView == null) {
return;
}
if (myLastActivePart != null) {
paletteView.partClosed(myLastActivePart);
} else {
paletteView.partClosed(myMultiDiagramEditor);
}
}
/**
* Finds the {@link PaletteView} at the same page as the host multi-editor
*
* @return palette view or <code>null</code> if not found
*/
private PaletteView findPaletteView() {
IWorkbenchPage samePage = myMultiDiagramEditor.getSite().getPage();
return (PaletteView) samePage.findView(PaletteView.ID);
}
}
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