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package org.eclipse.team.examples.filesystem.ui;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IStorage;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.content.IContentType;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.team.core.history.IFileRevision;
import org.eclipse.team.examples.filesystem.FileSystemPlugin;
import org.eclipse.team.internal.ui.history.AbstractHistoryCategory;
import org.eclipse.team.internal.ui.history.FileRevisionEditorInput;
import org.eclipse.team.ui.history.HistoryPage;
import org.eclipse.ui.IEditorDescriptor;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IEditorReference;
import org.eclipse.ui.IEditorRegistry;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.BaseSelectionListenerAction;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.progress.IProgressService;
public class OpenFileSystemRevisionAction extends BaseSelectionListenerAction {
private IStructuredSelection selection;
private HistoryPage page;
public OpenFileSystemRevisionAction(String text) {
super(text);
}
public void run() {
IStructuredSelection structSel = selection;
Object[] objArray = structSel.toArray();
for (int i = 0; i < objArray.length; i++) {
Object tempRevision = objArray[i];
final IFileRevision revision = (IFileRevision) tempRevision;
if (revision == null || !revision.exists()) {
MessageDialog.openError(page.getSite().getShell(), "Deleted Revision", "Can't open a deleted revision");
} else {
IRunnableWithProgress runnable = new IRunnableWithProgress() {
public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
IStorage file;
try {
file = revision.getStorage(monitor);
String id = getEditorID(file.getName(), file.getContents());
if (file instanceof IFile) {
//if this is the current workspace file, open it
IDE.openEditor(page.getSite().getPage(), (IFile) file);
} else {
FileSystemRevisionEditorInput fileRevEditorInput = new FileSystemRevisionEditorInput(revision);
if (!editorAlreadyOpenOnContents(fileRevEditorInput))
page.getSite().getPage().openEditor(fileRevEditorInput, id);
}
} catch (CoreException e) {
throw new InvocationTargetException(e);
}
}
};
IProgressService progressService = PlatformUI.getWorkbench().getProgressService();
try {
progressService.run(false, false, runnable);
} catch (InvocationTargetException e) {
} catch (InterruptedException e) {
}
}
}
}
/* private */String getEditorID(String fileName, InputStream contents) {
IWorkbench workbench = FileSystemPlugin.getPlugin().getWorkbench();
IEditorRegistry registry = workbench.getEditorRegistry();
IContentType type = null;
if (contents != null) {
try {
type = Platform.getContentTypeManager().findContentTypeFor(contents, fileName);
} catch (IOException e) {
}
}
if (type == null) {
type = Platform.getContentTypeManager().findContentTypeFor(fileName);
}
IEditorDescriptor descriptor = registry.getDefaultEditor(fileName, type);
String id;
if (descriptor == null || descriptor.isOpenExternal()) {
id = "org.eclipse.ui.DefaultTextEditor"; //$NON-NLS-1$
} else {
id = descriptor.getId();
}
return id;
}
protected boolean updateSelection(IStructuredSelection selection) {
this.selection = selection;
return shouldShow();
}
public void setPage(HistoryPage page) {
this.page = page;
}
private boolean shouldShow() {
IStructuredSelection structSel = selection;
Object[] objArray = structSel.toArray();
if (objArray.length == 0)
return false;
for (int i = 0; i < objArray.length; i++) {
//Don't bother showing if this a category
if (objArray[i] instanceof AbstractHistoryCategory)
return false;
IFileRevision revision = (IFileRevision) objArray[i];
//check to see if any of the selected revisions are deleted revisions
if (revision != null && !revision.exists())
return false;
}
return true;
}
private boolean editorAlreadyOpenOnContents(FileSystemRevisionEditorInput input) {
IEditorReference[] editorRefs = page.getSite().getPage().getEditorReferences();
for (int i = 0; i < editorRefs.length; i++) {
IEditorPart part = editorRefs[i].getEditor(false);
if (part != null && part.getEditorInput() instanceof FileRevisionEditorInput) {
IFileRevision inputRevision = (IFileRevision) input.getAdapter(IFileRevision.class);
IFileRevision editorRevision = (IFileRevision) part.getEditorInput().getAdapter(IFileRevision.class);
if (inputRevision.equals(editorRevision)) {
//make the editor that already contains the revision current
page.getSite().getPage().activate(part);
return true;
}
}
}
return false;
}
}
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