package org.erlide.ui.internal.compare;
import org.eclipse.compare.IStreamContentAccessor;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.source.SourceViewer;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.erlide.ui.editors.erl.ColorManager;
import org.erlide.ui.editors.erl.ErlangSourceViewerConfiguration;
import org.erlide.ui.internal.ErlideUIPlugin;
import org.erlide.util.ErlLogger;
public class ErlContentViewer extends Viewer {
private final SourceViewer fSourceViewer;
private Object fInput;
ErlContentViewer(final Composite parent) {
fSourceViewer = new SourceViewer(parent, null, SWT.LEFT_TO_RIGHT | SWT.H_SCROLL
| SWT.V_SCROLL);
final IPreferenceStore store = ErlideUIPlugin.getDefault().getPreferenceStore();
fSourceViewer.configure(new ErlangSourceViewerConfiguration(store,
new ColorManager()));
fSourceViewer.setEditable(false);
final String symbolicFontName = ErlMergeViewer.class.getName();
final Font font = JFaceResources.getFont(symbolicFontName);
if (font != null) {
fSourceViewer.getTextWidget().setFont(font);
}
}
@Override
public Control getControl() {
return fSourceViewer.getControl();
}
@Override
public void setInput(final Object input) {
if (input instanceof IStreamContentAccessor) {
final Document document = new Document(getString(input));
// ErlangCompareUtilities.setupDocument(document);
fSourceViewer.setDocument(document);
}
fInput = input;
}
@Override
public Object getInput() {
return fInput;
}
@Override
public ISelection getSelection() {
return fSourceViewer.getSelection();
}
@Override
public void setSelection(final ISelection s, final boolean reveal) {
fSourceViewer.setSelection(s, reveal);
}
@Override
public void refresh() {
fSourceViewer.refresh();
}
/**
* A helper method to retrieve the contents of the given object if it
* implements the IStreamContentAccessor interface.
*/
private static String getString(final Object input) {
if (input instanceof IStreamContentAccessor) {
final IStreamContentAccessor sca = (IStreamContentAccessor) input;
try {
return ErlangCompareUtilities.readString(sca);
} catch (final CoreException ex) {
ErlLogger.error(ex);
}
}
return ""; //$NON-NLS-1$
}
}