package org.erlide.ui.editors.erl.outline.filters;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.Stack;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.CheckStateChangedEvent;
import org.eclipse.jface.viewers.CheckboxTableViewer;
import org.eclipse.jface.viewers.ICheckStateListener;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Image;
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.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.dialogs.SelectionDialog;
import org.erlide.ui.util.SWTUtil;
import org.erlide.util.ListsUtils;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
public class CustomOutlineFiltersDialog extends SelectionDialog {
private static final String SEPARATOR = ","; //$NON-NLS-1$
private final String fViewId;
private boolean fEnablePatterns;
private List<String> fPatterns;
private final Set<String> fEnabledFilterIds;
private final List<FilterDescriptor> fBuiltInFilters;
private CheckboxTableViewer fCheckBoxList;
private Button fEnableUserDefinedPatterns;
private Text fUserDefinedPatterns;
private final Stack<FilterDescriptor> fFilterDescriptorChangeHistory;
/**
* Creates a dialog to customize Erlang element filters.
*
* @param shell
* the parent shell
* @param viewId
* the id of the view
* @param enablePatterns
* <code>true</code> if pattern filters are enabled
* @param patterns
* the filter patterns
* @param enabledFilterIds
* the Ids of the enabled filters
*/
public CustomOutlineFiltersDialog(final Shell shell, final String viewId,
final boolean enablePatterns, final Collection<String> patterns,
final Collection<String> enabledFilterIds) {
super(shell);
fViewId = viewId;
fPatterns = Lists.newArrayList(patterns);
fEnablePatterns = enablePatterns;
fEnabledFilterIds = Sets.newHashSet(enabledFilterIds);
fBuiltInFilters = FilterDescriptor.getFilterDescriptors(fViewId);
fFilterDescriptorChangeHistory = new Stack<>();
}
@Override
protected void configureShell(final Shell shell) {
setTitle("Erlang Element Filters");
setMessage("S&elect the elements to exclude from the view:");
super.configureShell(shell);
}
/**
* Overrides method in Dialog
*
* @see org.eclipse.jface.dialogs.Dialog#createDialogArea(Composite)
*/
@Override
protected Control createDialogArea(final Composite parent) {
initializeDialogUnits(parent);
// create a composite with standard margins and spacing
final Composite composite = new Composite(parent, SWT.NONE);
final 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);
composite.setLayout(layout);
composite.setLayoutData(new GridData(GridData.FILL_BOTH));
composite.setFont(parent.getFont());
final Composite group = composite;
// Checkbox
fEnableUserDefinedPatterns = new Button(group, SWT.CHECK);
fEnableUserDefinedPatterns.setFocus();
fEnableUserDefinedPatterns
.setText("&Name filter patterns (matching names will be hidden):");
// Pattern field
fUserDefinedPatterns = new Text(group, SWT.SINGLE | SWT.BORDER);
final GridData data = new GridData(
GridData.HORIZONTAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL);
data.widthHint = convertWidthInCharsToPixels(59);
fUserDefinedPatterns.setLayoutData(data);
final String patterns = convertToString(fPatterns, SEPARATOR);
fUserDefinedPatterns.setText(patterns);
// Info text
final Label info = new Label(group, SWT.LEFT);
info.setText(
"The patterns are separated by comma, where\n* = any string, ? = any character, ,, = ,");
// Enabling / disabling of pattern group
fEnableUserDefinedPatterns.setSelection(fEnablePatterns);
fUserDefinedPatterns.setEnabled(fEnablePatterns);
info.setEnabled(fEnablePatterns);
fEnableUserDefinedPatterns.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(final SelectionEvent e) {
final boolean state = fEnableUserDefinedPatterns.getSelection();
fUserDefinedPatterns.setEnabled(state);
info.setEnabled(fEnableUserDefinedPatterns.getSelection());
if (state) {
fUserDefinedPatterns.setFocus();
}
}
});
// Filters provided by extension point
if (!fBuiltInFilters.isEmpty()) {
createCheckBoxList(group);
}
applyDialogFont(parent);
return parent;
}
private String convertToString(final List<String> patterns, final String separator) {
return ListsUtils.packList(patterns, separator);
}
private void createCheckBoxList(final Composite parent) {
// Filler
new Label(parent, SWT.NONE);
Label info = new Label(parent, SWT.LEFT);
info.setText("S&elect the elements to exclude from the view:");
fCheckBoxList = CheckboxTableViewer.newCheckList(parent, SWT.BORDER);
GridData data = new GridData(GridData.FILL_BOTH);
data.heightHint = fCheckBoxList.getTable().getItemHeight() * 10;
fCheckBoxList.getTable().setLayoutData(data);
fCheckBoxList.setLabelProvider(createLabelPrivder());
fCheckBoxList.setContentProvider(new ArrayContentProvider());
Collections.sort(fBuiltInFilters);
fCheckBoxList.setInput(fBuiltInFilters);
setInitialSelections(getEnabledFilterDescriptors().toArray());
final List<?> initialSelection = getInitialElementSelections();
if (initialSelection != null && !initialSelection.isEmpty()) {
checkInitialSelections();
}
// Description
info = new Label(parent, SWT.LEFT);
info.setText("Filter description:");
final Text description = new Text(parent, SWT.LEFT | SWT.WRAP | SWT.MULTI
| SWT.READ_ONLY | SWT.BORDER | SWT.V_SCROLL);
data = new GridData(GridData.FILL_HORIZONTAL);
data.heightHint = convertHeightInCharsToPixels(3);
description.setLayoutData(data);
fCheckBoxList.addSelectionChangedListener(new ISelectionChangedListener() {
@Override
public void selectionChanged(final SelectionChangedEvent event) {
final ISelection selection = event.getSelection();
if (selection instanceof IStructuredSelection) {
final Object selectedElement = ((IStructuredSelection) selection)
.getFirstElement();
if (selectedElement instanceof FilterDescriptor) {
description.setText(
((FilterDescriptor) selectedElement).getDescription());
}
}
}
});
fCheckBoxList.addCheckStateListener(new ICheckStateListener() {
/*
* @see org.eclipse.jface.viewers.ICheckStateListener#checkStateChanged
* (org.eclipse.jface.viewers.CheckStateChangedEvent)
*/
@Override
public void checkStateChanged(final CheckStateChangedEvent event) {
final Object element = event.getElement();
if (element instanceof FilterDescriptor) {
// renew if already touched
if (fFilterDescriptorChangeHistory.contains(element)) {
fFilterDescriptorChangeHistory.remove(element);
}
fFilterDescriptorChangeHistory.push((FilterDescriptor) element);
}
}
});
addSelectionButtons(parent);
}
private void addSelectionButtons(final Composite composite) {
final Composite buttonComposite = new Composite(composite, SWT.RIGHT);
final GridLayout layout = new GridLayout();
layout.numColumns = 2;
buttonComposite.setLayout(layout);
final GridData data = new GridData(
GridData.HORIZONTAL_ALIGN_END | GridData.GRAB_HORIZONTAL);
data.grabExcessHorizontalSpace = true;
composite.setData(data);
// Select All button
final Button selectButton = createButton(buttonComposite,
IDialogConstants.SELECT_ALL_ID, "&Select All", false);
SWTUtil.setButtonDimensionHint(selectButton);
SelectionListener listener = new SelectionAdapter() {
@Override
public void widgetSelected(final SelectionEvent e) {
fCheckBoxList.setAllChecked(true);
fFilterDescriptorChangeHistory.clear();
for (final FilterDescriptor desc : fBuiltInFilters) {
fFilterDescriptorChangeHistory.push(desc);
}
}
};
selectButton.addSelectionListener(listener);
final Button deselectButton = createButton(buttonComposite,
IDialogConstants.DESELECT_ALL_ID, "&Deselect All", false);
SWTUtil.setButtonDimensionHint(deselectButton);
listener = new SelectionAdapter() {
@Override
public void widgetSelected(final SelectionEvent e) {
fCheckBoxList.setAllChecked(false);
fFilterDescriptorChangeHistory.clear();
for (final FilterDescriptor desc : fBuiltInFilters) {
fFilterDescriptorChangeHistory.push(desc);
}
}
};
deselectButton.addSelectionListener(listener);
}
private void checkInitialSelections() {
for (final Object item : getInitialElementSelections()) {
fCheckBoxList.setChecked(item, true);
}
}
@Override
protected void okPressed() {
if (fBuiltInFilters != null) {
final List<FilterDescriptor> result = Lists.newArrayList();
for (final FilterDescriptor desc : fBuiltInFilters) {
if (fCheckBoxList.getChecked(desc)) {
result.add(desc);
}
}
setResult(result);
}
super.okPressed();
}
private ILabelProvider createLabelPrivder() {
return new LabelProvider() {
@Override
public Image getImage(final Object element) {
return null;
}
@Override
public String getText(final Object element) {
if (element instanceof FilterDescriptor) {
return ((FilterDescriptor) element).getName();
}
return null;
}
};
}
// ---------- result handling ----------
@Override
protected void setResult(@SuppressWarnings("rawtypes") final List newResult) {
super.setResult(newResult);
if (fUserDefinedPatterns.getText().length() > 0) {
fEnablePatterns = fEnableUserDefinedPatterns.getSelection();
fPatterns = convertFromString(fUserDefinedPatterns.getText(), SEPARATOR);
} else {
fEnablePatterns = false;
fPatterns = Lists.newArrayList();
}
}
private List<String> convertFromString(final String text, final String separator) {
return ListsUtils.unpackList(text, separator);
}
/**
* @return the patterns which have been entered by the user
*/
public List<String> getUserDefinedPatterns() {
return fPatterns;
}
/**
* @return the Ids of the enabled built-in filters
*/
public Set<String> getEnabledFilterIds() {
final Set<String> result = Sets.newHashSet();
for (final Object item : getResult()) {
final FilterDescriptor desc = (FilterDescriptor) item;
result.add(desc.getId());
}
return result;
}
/**
* @return <code>true</code> if the user-defined patterns are disabled
*/
public boolean areUserDefinedPatternsEnabled() {
return fEnablePatterns;
}
/**
* @return a stack with the filter descriptor check history
* @since 3.0
*/
public Stack<FilterDescriptor> getFilterDescriptorChangeHistory() {
return fFilterDescriptorChangeHistory;
}
private List<FilterDescriptor> getEnabledFilterDescriptors() {
final List<FilterDescriptor> filterDescs = fBuiltInFilters;
final List<FilterDescriptor> result = Lists
.newArrayListWithCapacity(filterDescs.size());
for (final FilterDescriptor desc : filterDescs) {
if (fEnabledFilterIds.contains(desc.getId())) {
result.add(desc);
}
}
return result;
}
}