/*******************************************************************************
* Copyright (c) 2007 Exadel, Inc. and Red Hat, Inc.
* Distributed under license by Red Hat, Inc. All rights reserved.
* This program is 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:
* Exadel, Inc. and Red Hat, Inc. - initial API and implementation
******************************************************************************/
package org.jboss.tools.common.model.ui.texteditors;
import java.util.Properties;
import org.jboss.tools.common.meta.action.XAction;
import org.jboss.tools.common.meta.action.XActionInvoker;
import org.jboss.tools.common.model.XModelException;
import org.jboss.tools.common.model.XModelObject;
import org.jboss.tools.common.model.filesystems.impl.FileAnyImpl;
import org.jboss.tools.common.model.ui.ModelUIPlugin;
import org.jboss.tools.common.model.util.XModelObjectCache;
public class TextEditorSupport {
protected XModelObjectCache object = null;
protected int lock = 0;
private boolean modified = false;
protected ITextProvider provider;
protected long timeStamp = -1;
public void setProvider(ITextProvider provider) {
this.provider = provider;
}
public void setObject(XModelObject object) {
this.object = new XModelObjectCache(object);
update();
}
public XModelObject getModelObject() {
return (object == null) ? null : object.getObject();
}
public void update() {
if(lock > 0 || modified) return;
if(!needsUpdate()) return;
lock++;
try {
String content = loadContent();
if(provider.isEqualText(content)) {
return;
}
provider.setText(content);
setModified(false);
} finally {
lock--;
}
}
protected String loadContent() {
XModelObject o = getModelObject();
return ((FileAnyImpl)o).getAsText();
}
public void setModified(boolean set) {
if(modified == set) return;
modified = set;
XModelObject o = getModelObject();
if(o != null && set) o.setModified(true);
}
public boolean isModified() {
return modified;
}
public boolean canSave(boolean force) {
return (lock == 0 && (modified || force));
}
public void save() {
save(false);
}
public void save(boolean force) {
if(!canSave(force)) return;
lock++;
try {
FileAnyImpl f = (FileAnyImpl)getModelObject();
if(f != null) f.edit(provider.getText());
timeStamp = f.getTimeStamp();
} catch (XModelException e) {
ModelUIPlugin.getPluginLog().logError(e);
} finally {
lock--;
modified = false;
}
}
protected boolean needsUpdate() {
XModelObject o = (object == null) ? null : object.getObject();
if(o == null) return false;
long ts = o.getTimeStamp();
if(timeStamp == ts) return false;
timeStamp = ts;
// String entity = o.getModelEntity().getName();
// if("FileAnyLong".equals(entity)) {
// return false;
// }
return true;
}
public boolean canRevertToSaved() {
XModelObject o = getModelObject();
if(o == null || !o.isActive()) return false;
XAction a = o.getModelEntity().getActionList().getAction("DiscardActions.Discard"); //$NON-NLS-1$
return (a != null && a.isEnabled(o));
}
public void revertToSaved() {
XModelObject o = getModelObject();
if(o != null) {
XActionInvoker.invoke("DiscardActions.Discard", o, new Properties()); //$NON-NLS-1$
}
}
}