package com.googlecode.goclipse.ui.wizards;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.Wizard;
import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWizard;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.ide.IDE;
import com.googlecode.goclipse.ui.wizards.NewSourceFileComposite.SourceFileType;
import melnorme.lang.ide.core.LangCore;
/**
* This is a sample new wizard. Its role is to create a new file
* resource in the provided container. If the container resource
* (a folder or a project) is selected in the workspace
* when the wizard is opened, it will accept it as the target
* container. The wizard creates one file with the extension
* "go". If a sample multi-page editor (also available
* as a template) is registered for the same extension, it will
* be able to open it.
*/
public class NewGoFileWizard extends Wizard implements INewWizard {
private NewGoWizardPage page;
private ISelection selection;
/**
* Constructor for NewGoFileWizard.
*/
public NewGoFileWizard() {
super();
setNeedsProgressMonitor(true);
}
/**
* Adding the page to the wizard.
*/
@Override
public void addPages() {
page = new NewGoWizardPage(selection);
addPage(page);
}
/**
* This method is called when 'Finish' button is pressed in the wizard. We will create an
* operation and run it using wizard as execution context.
*/
@Override
public boolean performFinish() {
final String containerName = page.getContainerName();
final String fileName = page.getFileName();
IRunnableWithProgress op = new IRunnableWithProgress() {
@Override
public void run(IProgressMonitor monitor) throws InvocationTargetException {
try {
doFinish(containerName, fileName, monitor);
} catch (CoreException e) {
throw new InvocationTargetException(e);
} finally {
monitor.done();
}
}
};
try {
getContainer().run(true, false, op);
} catch (InterruptedException e) {
return false;
} catch (InvocationTargetException e) {
Throwable realException = e.getTargetException();
MessageDialog.openError(getShell(), "Error", realException.getMessage());
return false;
}
return true;
}
/**
* The worker method. It will find the container, create the file if missing or just replace its
* contents, and open the editor on the newly created file.
*/
private void doFinish(String containerName, String fileName, IProgressMonitor monitor)
throws CoreException {
// create a sample file
monitor.beginTask("Creating " + fileName, 2);
IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
IResource resource = root.findMember(new Path(containerName));
if (!resource.exists() || !(resource instanceof IContainer)) {
throwCoreException("Container \"" + containerName + "\" does not exist.");
}
IContainer container = (IContainer) resource;
final IFile file = container.getFile(new Path(fileName));
InputStream stream = openContentStream(file);
if (file.exists()) {
file.setContents(stream, true, true, monitor);
} else {
file.create(stream, true, monitor);
}
monitor.worked(1);
monitor.setTaskName("Opening file for editing...");
getShell().getDisplay().asyncExec(new Runnable() {
@Override
public void run() {
IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
try {
IDE.openEditor(page, file, true);
} catch (PartInitException e) {
LangCore.logError("Error opening editor", e);
}
}
});
monitor.worked(1);
}
/**
* We will initialize file contents with a sample text.
*/
private InputStream openContentStream(IFile file) {
SourceFileType type = page.getSourFileType();
StringBuilder sb = new StringBuilder();
switch (type) {
case PACKAGE_FILE:
sb.append("package ").append(file.getParent().getName()).append("\n");
sb.append("\n");
sb.append("import (\n\n");
sb.append(")\n\n");
break;
case MAIN_DEFAULT:
sb.append("package main \n\n");
sb.append("import (\n\n");
sb.append(")\n\n");
sb.append("func main() {\n\n");
sb.append("}\n\n");
break;
case MAIN_WITH_PARAMETERS:
sb.append("package main \n\n");
sb.append("import (\n");
sb.append(" \"flag\"\n");
sb.append(" \"fmt\"\n");
sb.append(")\n\n");
sb.append("const APP_VERSION = \"0.1\"\n\n");
sb.append("// The flag package provides a default help printer via -h switch\n");
sb.append("var versionFlag *bool = flag.Bool(\"v\", false, \"Print the version number.\")\n\n");
sb.append("func main() {\n");
sb.append(" flag.Parse() // Scan the arguments list \n\n");
sb.append(" if *versionFlag {\n");
sb.append(" fmt.Println(\"Version:\", APP_VERSION)\n");
sb.append(" }\n");
sb.append("}\n\n");
break;
case MAIN_WEBSERVER:
sb.append("package main \n\n");
sb.append("import (\n");
sb.append(" \"net/http\"\n");
sb.append(" \"fmt\"\n");
sb.append(")\n\n");
sb.append("// Default Request Handler\n");
sb.append("func defaultHandler(w http.ResponseWriter, r *http.Request) {\n");
sb.append(" fmt.Fprintf(w, \"<h1>Hello %s!</h1>\", r.URL.Path[1:])\n");
sb.append("}\n\n");
sb.append("func main() {\n");
sb.append(" http.HandleFunc(\"/\", defaultHandler)\n");
sb.append(" http.ListenAndServe(\":8080\", nil)\n");
sb.append("}\n\n");
break;
case TEST:
sb.append("package ").append(file.getParent().getName()).append("\n");
sb.append("\n");
sb.append("import (\n");
sb.append(" \"testing\"\n");
sb.append(")\n\n");
sb.append("func TestXYZ(t *testing.T) {\n\n");
sb.append("}\n\n");
break;
}
return new ByteArrayInputStream(sb.toString().getBytes());
}
private void throwCoreException(String message) throws CoreException {
IStatus status =
new Status(IStatus.ERROR, "goclipse", IStatus.OK, message, null);
throw new CoreException(status);
}
/**
* We will accept the selection in the workbench to see if
* we can initialize from it.
* @see IWorkbenchWizard#init(IWorkbench, IStructuredSelection)
*/
@Override
public void init(IWorkbench workbench, IStructuredSelection selection) {
this.selection = selection;
}
}