package org.objectstyle.wolips.baseforuiplugins.utils;
import java.io.PrintWriter;
import java.io.StringWriter;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.IconAndMessageDialog;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.dnd.Clipboard;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
/**
* A dialog to display one or more errors to the user, as contained in an
* <code>IStatus</code> object. If an error contains additional detailed
* information then a Details button is automatically supplied, which shows or
* hides an error details viewer when pressed by the user.
*
* @see org.eclipse.core.runtime.IStatus
*/
public class ErrorDialog extends IconAndMessageDialog {
/**
* Static to prevent opening of error dialogs for automated testing.
*/
public static boolean AUTOMATED_MODE = false;
/**
* Reserve room for this many list items.
*/
private static final int LIST_ITEM_COUNT = 7;
/**
* The nesting indent.
*/
private static final String NESTING_INDENT = " "; //$NON-NLS-1$
/**
* The Details button.
*/
private Button detailsButton;
/**
* The title of the dialog.
*/
private String title;
/**
* The SWT list control that displays the error details.
*/
private Text errorDetails;
/**
* Indicates whether the error details viewer is currently created.
*/
private boolean listCreated = false;
/**
* Filter mask for determining which status items to display.
*/
private int displayMask = 0xFFFF;
/**
* The main status object.
*/
private IStatus status;
/**
* The current clipboard. To be disposed when closing the dialog.
*/
private Clipboard clipboard;
private boolean shouldIncludeTopLevelErrorInDetails = false;
/**
* Creates an error dialog. Note that the dialog will have no visual
* representation (no widgets) until it is told to open.
* <p>
* Normally one should use <code>openError</code> to create and open one
* of these. This constructor is useful only if the error object being
* displayed contains child items <it>and </it> you need to specify a mask
* which will be used to filter the displaying of these children.
* </p>
*
* @param parentShell
* the shell under which to create this dialog
* @param dialogTitle
* the title to use for this dialog, or <code>null</code> to
* indicate that the default title should be used
* @param message
* the message to show in this dialog, or <code>null</code> to
* indicate that the error's message should be shown as the
* primary message
* @param status
* the error to show to the user
* @param displayMask
* the mask to use to filter the displaying of child items, as
* per <code>IStatus.matches</code>
* @see org.eclipse.core.runtime.IStatus#matches(int)
*/
public ErrorDialog(Shell parentShell, String dialogTitle, String message,
IStatus status, int displayMask) {
super(parentShell);
this.title = dialogTitle == null ? JFaceResources
.getString("Problem_Occurred") : //$NON-NLS-1$
dialogTitle;
this.message = message;
this.status = status;
this.displayMask = displayMask;
setShellStyle(getShellStyle() | SWT.RESIZE);
}
/*
* (non-Javadoc) Method declared on Dialog. Handles the pressing of the Ok
* or Details button in this dialog. If the Ok button was pressed then close
* this dialog. If the Details button was pressed then toggle the displaying
* of the error details area. Note that the Details button will only be
* visible if the error being displayed specifies child details.
*/
protected void buttonPressed(int id) {
if (id == IDialogConstants.DETAILS_ID) {
// was the details button pressed?
toggleDetailsArea();
} else {
super.buttonPressed(id);
}
}
/*
* (non-Javadoc) Method declared in Window.
*/
protected void configureShell(Shell shell) {
super.configureShell(shell);
shell.setText(title);
}
/*
* (non-Javadoc) Method declared on Dialog.
*/
protected void createButtonsForButtonBar(Composite parent) {
// create OK and Details buttons
createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL,
true);
createDetailsButton(parent);
}
/**
* Create the details button if it should be included.
* @param parent the parent composite
* @since 3.2
*/
protected void createDetailsButton(Composite parent) {
if (shouldShowDetailsButton()) {
detailsButton = createButton(parent, IDialogConstants.DETAILS_ID,
IDialogConstants.SHOW_DETAILS_LABEL, false);
}
}
/**
* This implementation of the <code>Dialog</code> framework method creates
* and lays out a composite and calls <code>createMessageArea</code> and
* <code>createCustomArea</code> to populate it. Subclasses should
* override <code>createCustomArea</code> to add contents below the
* message.
*/
protected Control createDialogArea(Composite parent) {
createMessageArea(parent);
// create a composite with standard margins and spacing
Composite composite = new Composite(parent, SWT.NONE);
GridLayout layout = new GridLayout();
layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN);
layout.marginWidth = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN);
layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
layout.numColumns = 2;
composite.setLayout(layout);
GridData childData = new GridData(GridData.FILL_BOTH);
childData.horizontalSpan = 2;
composite.setLayoutData(childData);
composite.setFont(parent.getFont());
return composite;
}
/*
* @see IconAndMessageDialog#createDialogAndButtonArea(Composite)
*/
protected void createDialogAndButtonArea(Composite parent) {
super.createDialogAndButtonArea(parent);
if (this.dialogArea instanceof Composite) {
//Create a label if there are no children to force a smaller layout
Composite dialogComposite = (Composite) dialogArea;
if (dialogComposite.getChildren().length == 0) {
new Label(dialogComposite, SWT.NULL);
}
}
}
/*
* (non-Javadoc)
* @see org.eclipse.jface.dialogs.IconAndMessageDialog#getImage()
*/
protected Image getImage() {
if (status != null) {
if (status.getSeverity() == IStatus.WARNING) {
return getWarningImage();
}
if (status.getSeverity() == IStatus.INFO) {
return getInfoImage();
}
}
//If it was not a warning or an error then return the error image
return getErrorImage();
}
/**
* Create this dialog's drop-down list component.
*
* @param parent
* the parent composite
* @return the drop-down list component
*/
protected Text createErrorDetails(Composite parent) {
// create the list
errorDetails = new Text(parent, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL | SWT.READ_ONLY);
// fill the list
populateErrorDetails(errorDetails);
GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL
| GridData.GRAB_HORIZONTAL | GridData.VERTICAL_ALIGN_FILL
| GridData.GRAB_VERTICAL);
data.heightHint = 300;
data.horizontalSpan = 2;
errorDetails.setLayoutData(data);
errorDetails.setFont(parent.getFont());
Menu copyMenu = new Menu(errorDetails);
MenuItem copyItem = new MenuItem(copyMenu, SWT.NONE);
copyItem.addSelectionListener(new SelectionListener() {
/*
* @see SelectionListener.widgetSelected (SelectionEvent)
*/
public void widgetSelected(SelectionEvent e) {
copyToClipboard();
}
/*
* @see SelectionListener.widgetDefaultSelected(SelectionEvent)
*/
public void widgetDefaultSelected(SelectionEvent e) {
copyToClipboard();
}
});
copyItem.setText(JFaceResources.getString("copy")); //$NON-NLS-1$
errorDetails.setMenu(copyMenu);
listCreated = true;
return errorDetails;
}
/*
* (non-Javadoc) Method declared on Window.
*/
/**
* Extends <code>Window.open()</code>. Opens an error dialog to display
* the error. If you specified a mask to filter the displaying of these
* children, the error dialog will only be displayed if there is at least
* one child status matching the mask.
*/
public int open() {
if (!AUTOMATED_MODE && shouldDisplay(status, displayMask)) {
return super.open();
}
setReturnCode(OK);
return OK;
}
/**
* Opens an error dialog to display the given error. Use this method if the
* error object being displayed does not contain child items, or if you wish
* to display all such items without filtering.
*
* @param parent
* the parent shell of the dialog, or <code>null</code> if none
* @param dialogTitle
* the title to use for this dialog, or <code>null</code> to
* indicate that the default title should be used
* @param message
* the message to show in this dialog, or <code>null</code> to
* indicate that the error's message should be shown as the
* primary message
* @param status
* the error to show to the user
* @return the code of the button that was pressed that resulted in this
* dialog closing. This will be <code>Dialog.OK</code> if the OK
* button was pressed, or <code>Dialog.CANCEL</code> if this
* dialog's close window decoration or the ESC key was used.
*/
public static int openError(Shell parent, String dialogTitle,
String message, IStatus status) {
return openError(parent, dialogTitle, message, status, IStatus.OK
| IStatus.INFO | IStatus.WARNING | IStatus.ERROR);
}
/**
* Opens an error dialog to display the given error. Use this method if the
* error object being displayed contains child items <it>and </it> you wish
* to specify a mask which will be used to filter the displaying of these
* children. The error dialog will only be displayed if there is at least
* one child status matching the mask.
*
* @param parentShell
* the parent shell of the dialog, or <code>null</code> if none
* @param title
* the title to use for this dialog, or <code>null</code> to
* indicate that the default title should be used
* @param message
* the message to show in this dialog, or <code>null</code> to
* indicate that the error's message should be shown as the
* primary message
* @param status
* the error to show to the user
* @param displayMask
* the mask to use to filter the displaying of child items, as
* per <code>IStatus.matches</code>
* @return the code of the button that was pressed that resulted in this
* dialog closing. This will be <code>Dialog.OK</code> if the OK
* button was pressed, or <code>Dialog.CANCEL</code> if this
* dialog's close window decoration or the ESC key was used.
* @see org.eclipse.core.runtime.IStatus#matches(int)
*/
public static int openError(Shell parentShell, String title,
String message, IStatus status, int displayMask) {
ErrorDialog dialog = new ErrorDialog(parentShell, title, message,
status, displayMask);
return dialog.open();
}
/**
* Populates the list using this error dialog's status object. This walks
* the child static of the status object and displays them in a list. The
* format for each entry is status_path : status_message If the status's
* path was null then it (and the colon) are omitted.
* @param listToPopulate The list to fill.
*/
private void populateErrorDetails(Text listToPopulate) {
if (status != null) {
Throwable t = status.getException();
if (t != null) {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
t.printStackTrace(pw);
pw.flush();
StringBuffer sb = sw.getBuffer();
listToPopulate.setText(sb.toString());
}
}
}
/**
* Returns whether the given status object should be displayed.
*
* @param status
* a status object
* @param mask
* a mask as per <code>IStatus.matches</code>
* @return <code>true</code> if the given status should be displayed, and
* <code>false</code> otherwise
* @see org.eclipse.core.runtime.IStatus#matches(int)
*/
protected static boolean shouldDisplay(IStatus status, int mask) {
IStatus[] children = status.getChildren();
if (children == null || children.length == 0) {
return status.matches(mask);
}
for (int i = 0; i < children.length; i++) {
if (children[i].matches(mask)) {
return true;
}
}
return false;
}
/**
* Toggles the unfolding of the details area. This is triggered by the user
* pressing the details button.
*/
private void toggleDetailsArea() {
Point windowSize = getShell().getSize();
Point oldSize = getShell().computeSize(SWT.DEFAULT, SWT.DEFAULT);
if (listCreated) {
errorDetails.dispose();
listCreated = false;
detailsButton.setText(IDialogConstants.SHOW_DETAILS_LABEL);
} else {
errorDetails = createErrorDetails((Composite) getContents());
detailsButton.setText(IDialogConstants.HIDE_DETAILS_LABEL);
}
Point newSize = getShell().computeSize(SWT.DEFAULT, SWT.DEFAULT);
getShell()
.setSize(
new Point(windowSize.x, windowSize.y
+ (newSize.y - oldSize.y)));
}
/**
* Put the details of the status of the error onto the stream.
*
* @param buildingStatus
* @param buffer
* @param nesting
*/
private void populateCopyBuffer(IStatus buildingStatus,
StringBuffer buffer, int nesting) {
if (!buildingStatus.matches(displayMask)) {
return;
}
for (int i = 0; i < nesting; i++) {
buffer.append(NESTING_INDENT);
}
buffer.append(buildingStatus.getMessage());
buffer.append("\n"); //$NON-NLS-1$
// Look for a nested core exception
Throwable t = buildingStatus.getException();
if (t instanceof CoreException) {
CoreException ce = (CoreException)t;
populateCopyBuffer(ce.getStatus(), buffer, nesting + 1);
}
IStatus[] children = buildingStatus.getChildren();
for (int i = 0; i < children.length; i++) {
populateCopyBuffer(children[i], buffer, nesting + 1);
}
}
/**
* Copy the contents of the statuses to the clipboard.
*/
private void copyToClipboard() {
if (clipboard != null) {
clipboard.dispose();
}
StringBuffer statusBuffer = new StringBuffer();
populateCopyBuffer(status, statusBuffer, 0);
clipboard = new Clipboard(errorDetails.getDisplay());
clipboard.setContents(new Object[] { statusBuffer.toString() },
new Transfer[] { TextTransfer.getInstance() });
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.window.Window#close()
*/
public boolean close() {
if (clipboard != null) {
clipboard.dispose();
}
return super.close();
}
/**
* Show the details portion of the dialog if it is not already visible.
* This method will only work when it is invoked after the control of the dialog
* has been set. In other words, after the <code>createContents</code> method
* has been invoked and has returned the control for the content area of the dialog.
* Invoking the method before the content area has been set or after the dialog has been
* disposed will have no effect.
* @since 3.1
*/
protected final void showDetailsArea() {
if (!listCreated) {
Control control = getContents();
if (control != null && ! control.isDisposed()) {
toggleDetailsArea();
}
}
}
/**
* Return whether the Details button should be included.
* This method is invoked once when the dialog is built.
* By default, the Details button is only included if
* the status used when creating the dialog was a multi-status
* or if the status contains an exception.
* Subclasses may override.
* @return whether the Details button should be included
* @since 3.1
*/
protected boolean shouldShowDetailsButton() {
return status.isMultiStatus() || status.getException() != null;
}
/**
* Set the status displayed by this error dialog to the given status.
* This only affects the status displayed by the Details list.
* The message, image and title should be updated by the subclass,
* if desired.
* @param status the status to be displayed in the details list
* @since 3.1
*/
protected final void setStatus(IStatus status) {
if (this.status != status) {
this.status = status;
}
shouldIncludeTopLevelErrorInDetails = true;
if (listCreated) {
repopulateList();
}
}
/**
* Repopulate the supplied list widget.
*/
private void repopulateList() {
if (errorDetails != null && !errorDetails.isDisposed()) {
populateErrorDetails(errorDetails);
}
}
}