/* ********************************************************************** **
** Copyright notice **
** **
** (c) 2005-2009 RSSOwl Development Team **
** http://www.rssowl.org/ **
** **
** All rights reserved **
** **
** This program and the accompanying materials are made available under **
** the terms of the Eclipse Public License v1.0 which accompanies this **
** distribution, and is available at: **
** http://www.rssowl.org/legal/epl-v10.html **
** **
** A copy is found in the file epl-v10.html and important notices to the **
** license from the team is found in the textfile LICENSE.txt distributed **
** in this package. **
** **
** This copyright notice MUST APPEAR in all copies of the file! **
** **
** Contributors: **
** RSSOwl Development Team - initial API and implementation **
** **
** ********************************************************************** */
package org.rssowl.ui.internal.search;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.viewers.AbstractTreeViewer;
import org.eclipse.jface.viewers.CheckboxTreeViewer;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.ITreeViewerListener;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeExpansionEvent;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Link;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
import org.eclipse.ui.dialogs.FilteredTree;
import org.eclipse.ui.dialogs.PatternFilter;
import org.rssowl.core.Owl;
import org.rssowl.core.internal.persist.pref.DefaultPreferences;
import org.rssowl.core.persist.IBookMark;
import org.rssowl.core.persist.IFolder;
import org.rssowl.core.persist.IFolderChild;
import org.rssowl.core.persist.IMark;
import org.rssowl.core.persist.IModelFactory;
import org.rssowl.core.persist.INews;
import org.rssowl.core.persist.INewsBin;
import org.rssowl.core.persist.ISearchCondition;
import org.rssowl.core.persist.ISearchField;
import org.rssowl.core.persist.ISearchMark;
import org.rssowl.core.persist.SearchSpecifier;
import org.rssowl.core.util.CoreUtils;
import org.rssowl.core.util.StringUtils;
import org.rssowl.ui.internal.ApplicationWorkbenchWindowAdvisor;
import org.rssowl.ui.internal.OwlUI;
import org.rssowl.ui.internal.actions.NewNewsBinAction;
import org.rssowl.ui.internal.util.LayoutUtils;
import org.rssowl.ui.internal.util.ModelUtils;
import org.rssowl.ui.internal.views.explorer.BookMarkLabelProvider;
import org.rssowl.ui.internal.views.explorer.BookMarkSorter;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* The <code>LocationConditionControl</code> is a <code>Composite</code>
* providing the UI to define Location-Conditions for a Search.
*
* @author bpasero
*/
public class LocationControl extends Composite {
private Mode fMode = Mode.SEARCH_LOCATION;
private Link fConditionLabel;
private List<IFolderChild> fSelection;
private boolean fModified;
/** Supported Modes for the Control */
public enum Mode {
/** Select a Folder Child to Search in */
SEARCH_LOCATION,
/** Select a News Bin */
SELECT_BIN
}
/* A Dialog to select Folders and Childs */
private class FolderChildChooserDialog extends Dialog {
private CheckboxTreeViewer fViewer;
private List<IFolderChild> fCheckedElements;
private IFolderChild fSelectedElement;
private Set<IFolderChild> fCheckedElementsCache = new HashSet<IFolderChild>();
private FilteredTree fFilteredTree;
private Button fSelectAll;
FolderChildChooserDialog(Shell parentShell, IFolderChild selectedElement, List<IFolderChild> checkedElements) {
super(parentShell);
fSelectedElement = selectedElement;
fCheckedElements = checkedElements;
}
List<IFolderChild> getCheckedElements() {
return fCheckedElements;
}
/*
* @see org.eclipse.jface.dialogs.Dialog#okPressed()
*/
@Override
protected void okPressed() {
Object[] checkedObjects = fCheckedElementsCache.toArray();
IStructuredSelection selection = new StructuredSelection(checkedObjects);
List<IFolderChild> entities = ModelUtils.getFoldersBookMarksBins(selection);
/* Normalize */
CoreUtils.normalize(entities);
fCheckedElements = entities;
fModified = true;
super.okPressed();
}
/*
* @see org.eclipse.jface.dialogs.Dialog#createDialogArea(org.eclipse.swt.widgets.Composite)
*/
@Override
protected Control createDialogArea(Composite parent) {
Composite composite = new Composite(parent, SWT.NONE);
composite.setLayout(LayoutUtils.createGridLayout(1, 10, 10));
composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
Label label = new Label(composite, SWT.None);
label.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false));
switch (fMode) {
case SEARCH_LOCATION:
label.setText(Messages.LocationControl_CHOOSE_LOCATION_MSG);
break;
case SELECT_BIN:
label.setText(Messages.LocationControl_CHOOSE_BINS_MSG);
break;
}
/* Filter for Filtered Tree */
final PatternFilter filter = new PatternFilter() {
@Override
protected boolean isLeafMatch(Viewer viewer, Object element) {
if (fMode == Mode.SELECT_BIN && !(element instanceof INewsBin))
return false;
String labelText = ((IFolderChild) element).getName();
if (labelText == null)
return false;
return wordMatches(labelText);
}
};
/* Filtered Tree to make it easier to chose an element */
fFilteredTree = new FilteredTree(composite, SWT.BORDER, filter) {
@Override
protected TreeViewer doCreateTreeViewer(Composite parent, int style) {
fViewer = new CheckboxTreeViewer(parent, SWT.BORDER) {
@Override
public void refresh(boolean updateLabels) {
super.refresh(updateLabels);
/* Avoid collapsed Tree */
expandToLevel(fMode == Mode.SELECT_BIN ? AbstractTreeViewer.ALL_LEVELS : 2);
/* Restore Checked Elements */
for (IFolderChild child : fCheckedElementsCache) {
setParentsExpanded(child);
fViewer.setChecked(child, true);
setChildsChecked(child, true, true, false);
}
}
};
fViewer.setAutoExpandLevel(fMode == Mode.SELECT_BIN ? AbstractTreeViewer.ALL_LEVELS : 2);
fViewer.getTree().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
fViewer.getTree().setData(ApplicationWorkbenchWindowAdvisor.FOCUSLESS_SCROLL_HOOK, new Object());
return fViewer;
}
@Override
protected void updateToolbar(boolean visible) {
if (filterToolBar != null)
filterToolBar.getControl().setEnabled(visible);
}
@Override
protected Composite createFilterControls(Composite parent) {
Composite filterControls = super.createFilterControls(parent);
if (filterToolBar != null) {
filterToolBar.getControl().setVisible(true);
filterToolBar.getControl().setEnabled(false);
}
return filterControls;
}
};
fFilteredTree.setInitialText(""); //$NON-NLS-1$
if (fMode == Mode.SEARCH_LOCATION) {
fFilteredTree.getFilterControl().setMessage(Messages.LocationControl_FILTER_LOCATIONS);
OwlUI.makeAccessible(fFilteredTree.getFilterControl(), Messages.LocationControl_FILTER_LOCATIONS);
} else {
fFilteredTree.getFilterControl().setMessage(Messages.LocationControl_FILTER_BINS);
OwlUI.makeAccessible(fFilteredTree.getFilterControl(), Messages.LocationControl_FILTER_BINS);
}
fFilteredTree.getViewer().getControl().setFocus();
/* Filter when Typing into Tree */
fFilteredTree.getViewer().getControl().addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if (e.character > 0x20) {
String character = String.valueOf(e.character);
Text text = fFilteredTree.getFilterControl();
text.setFocus();
text.setText(character);
text.setSelection(1);
filter.setPattern(character);
/* Consume the Event */
e.doit = false;
}
}
});
/* Handle some UI changes based on filter enabled or not */
fFilteredTree.getFilterControl().addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent e) {
boolean isFiltered = StringUtils.isSet(fFilteredTree.getFilterControl().getText());
/* "Select All" enablement */
if (fSelectAll != null)
fSelectAll.setEnabled(!isFiltered);
/* Remove all checked elements when filtering */
if (isFiltered) {
OwlUI.setAllChecked(fViewer.getTree(), false);
cacheAll(false);
}
}
});
int viewerHeight = fViewer.getTree().getItemHeight() * 20 + 12;
((GridData) composite.getLayoutData()).heightHint = viewerHeight;
/* Sort by Name if set so */
if (Owl.getPreferenceService().getGlobalScope().getBoolean(DefaultPreferences.BE_SORT_BY_NAME)) {
BookMarkSorter sorter = new BookMarkSorter();
sorter.setType(BookMarkSorter.Type.SORT_BY_NAME);
fViewer.setComparator(sorter);
}
fViewer.setContentProvider(new ITreeContentProvider() {
public Object[] getElements(Object inputElement) {
Collection<IFolder> rootFolders = CoreUtils.loadRootFolders();
return rootFolders.toArray();
}
public Object[] getChildren(Object parentElement) {
if (parentElement instanceof IFolder) {
IFolder folder = (IFolder) parentElement;
return folder.getChildren().toArray();
}
return new Object[0];
}
public Object getParent(Object element) {
if (element instanceof IFolder) {
IFolder folder = (IFolder) element;
return folder.getParent();
}
return null;
}
public boolean hasChildren(Object element) {
if (element instanceof IFolder) {
IFolder folder = (IFolder) element;
return !folder.isEmpty();
}
return false;
}
public void dispose() {}
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {}
});
fViewer.setLabelProvider(new BookMarkLabelProvider(false, true) {
@Override
public void update(ViewerCell cell) {
super.update(cell);
if (fMode == Mode.SELECT_BIN) {
Object element = cell.getElement();
if (element instanceof IFolder && !OwlUI.isHighContrast())
cell.setForeground(fViewer.getControl().getDisplay().getSystemColor(SWT.COLOR_GRAY));
}
}
});
/* Filter out any Search Marks */
fViewer.addFilter(new ViewerFilter() {
@Override
public boolean select(Viewer viewer, Object parentElement, Object element) {
switch (fMode) {
case SEARCH_LOCATION:
return !(element instanceof ISearchMark);
case SELECT_BIN:
if (element instanceof IFolder)
return containsBin(((IFolder) element).getChildren());
return !(element instanceof ISearchMark || element instanceof IBookMark);
}
return true;
}
private boolean containsBin(List<IFolderChild> children) {
for (IFolderChild child : children) {
if (child instanceof INewsBin)
return true;
else if (child instanceof IFolder && containsBin((((IFolder) child).getChildren())))
return true;
}
return false;
}
});
fViewer.addDoubleClickListener(new IDoubleClickListener() {
public void doubleClick(DoubleClickEvent event) {
IStructuredSelection selection = (IStructuredSelection) event.getSelection();
IFolder folder = selection.getFirstElement() instanceof IFolder ? (IFolder) selection.getFirstElement() : null;
/* Expand / Collapse Folder */
if (folder != null && !folder.isEmpty()) {
boolean expandedState = !fViewer.getExpandedState(folder);
fViewer.setExpandedState(folder, expandedState);
if (expandedState && fViewer.getChecked(folder))
setChildsChecked(folder, true, true, false);
}
}
});
fViewer.setInput(new Object());
/* Apply checked elements */
if (fCheckedElements != null) {
for (IFolderChild child : fCheckedElements) {
setParentsExpanded(child);
cache(child, true);
fViewer.setChecked(child, true);
setChildsChecked(child, true, true, true);
}
}
/* Update Checks on Selection */
fViewer.getTree().addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
if (e.detail == SWT.CHECK) {
TreeItem item = (TreeItem) e.item;
/* Disable selection for Folders if SELECT_BIN */
if (fMode == Mode.SELECT_BIN && item.getData() instanceof IFolder) {
e.detail = SWT.NONE;
e.doit = false;
item.setChecked(false);
}
/* Normal selection behavior otherwise */
else {
IFolderChild folderChild = (IFolderChild) item.getData();
setChildsChecked(folderChild, item.getChecked(), false, true);
cache(folderChild, item.getChecked());
if (!item.getChecked())
setParentsChecked(folderChild, false, true);
}
}
}
});
/* Update Checks on Expand */
fViewer.addTreeListener(new ITreeViewerListener() {
public void treeExpanded(TreeExpansionEvent event) {
boolean isChecked = fViewer.getChecked(event.getElement());
if (isChecked)
setChildsChecked((IFolderChild) event.getElement(), isChecked, false, false);
}
public void treeCollapsed(TreeExpansionEvent event) {}
});
/* Select and Show Selection */
if (fSelectedElement != null) {
fViewer.setSelection(new StructuredSelection(fSelectedElement));
fViewer.getTree().showSelection();
}
/* Buttons */
Composite buttonContainer = new Composite(composite, SWT.NONE);
buttonContainer.setLayout(LayoutUtils.createGridLayout(2, 0, 0));
buttonContainer.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false));
/* Select All / Deselect All for Location Lookup */
if (fMode == Mode.SEARCH_LOCATION) {
fSelectAll = new Button(buttonContainer, SWT.PUSH);
fSelectAll.setText(Messages.LocationControl_SELECT_ALL);
Dialog.applyDialogFont(fSelectAll);
setButtonLayoutData(fSelectAll);
fSelectAll.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
OwlUI.setAllChecked(fViewer.getTree(), true);
cacheAll(true);
}
});
Button deselectAll = new Button(buttonContainer, SWT.PUSH);
deselectAll.setText(Messages.LocationControl_DESELECT_ALL);
Dialog.applyDialogFont(deselectAll);
setButtonLayoutData(deselectAll);
deselectAll.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
OwlUI.setAllChecked(fViewer.getTree(), false);
cacheAll(false);
}
});
}
/* Create Bin for Bin Selection */
else {
Button createBin = new Button(buttonContainer, SWT.PUSH);
createBin.setText(Messages.LocationControl_NEW_NEWSBIN);
Dialog.applyDialogFont(createBin);
setButtonLayoutData(createBin);
createBin.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
onCreateNewsBin();
}
});
}
applyDialogFont(composite);
return composite;
}
private void onCreateNewsBin() {
IFolderChild selectedFolderChild = null;
IStructuredSelection selection = (IStructuredSelection) fViewer.getSelection();
if (!selection.isEmpty()) {
Object element = selection.getFirstElement();
if (element instanceof IFolderChild)
selectedFolderChild = (IFolderChild) element;
}
IFolder folder = (IFolder) ((selectedFolderChild instanceof IFolder) ? selectedFolderChild : null);
IMark position = null;
if (folder == null && selectedFolderChild != null && selectedFolderChild instanceof IMark) {
folder = selectedFolderChild.getParent();
position = (IMark) selectedFolderChild;
}
NewNewsBinAction action = new NewNewsBinAction(getShell(), folder, position);
action.run(null);
INewsBin newsbin = action.getNewsbin();
if (newsbin != null) {
fFilteredTree.getPatternFilter().setPattern(""); //$NON-NLS-1$
fFilteredTree.getFilterControl().setText(""); //$NON-NLS-1$
fViewer.refresh();
fViewer.expandAll();
fViewer.setSelection(new StructuredSelection(newsbin), true);
fViewer.setChecked(newsbin, true);
fCheckedElementsCache.add(newsbin);
}
}
/*
* @see org.eclipse.jface.dialogs.Dialog#createButtonBar(org.eclipse.swt.widgets.Composite)
*/
@Override
protected Control createButtonBar(Composite parent) {
/* Separator */
Label sep = new Label(parent, SWT.SEPARATOR | SWT.HORIZONTAL);
sep.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false, 2, 1));
return super.createButtonBar(parent);
}
private void cache(IFolderChild child, boolean checked) {
if (checked)
fCheckedElementsCache.add(child);
else
fCheckedElementsCache.remove(child);
}
private void cacheAll(boolean checked) {
Tree tree = fViewer.getTree();
cacheAll(tree.getItems(), checked);
}
private void cacheAll(TreeItem[] items, boolean checked) {
for (TreeItem item : items) {
if (item.getData() != null) { //Could not yet be resolved!
cache((IFolderChild) item.getData(), checked);
cacheAll(item.getItems(), checked);
}
}
}
private void setChildsChecked(IFolderChild folderChild, boolean checked, boolean onlyExpanded, boolean cache) {
if (folderChild instanceof IFolder && (!onlyExpanded || fViewer.getExpandedState(folderChild))) {
List<IFolderChild> children = ((IFolder) folderChild).getChildren();
for (IFolderChild child : children) {
if (cache)
cache(child, checked);
fViewer.setChecked(child, checked);
setChildsChecked(child, checked, onlyExpanded, cache);
}
}
}
private void setParentsChecked(IFolderChild folderChild, boolean checked, boolean cache) {
IFolder parent = folderChild.getParent();
if (parent != null) {
if (cache)
cache(parent, checked);
fViewer.setChecked(parent, checked);
setParentsChecked(parent, checked, cache);
}
}
private void setParentsExpanded(IFolderChild folderChild) {
IFolder parent = folderChild.getParent();
if (parent != null) {
fViewer.setExpandedState(parent, true);
setParentsExpanded(parent);
}
}
/*
* @see org.eclipse.jface.window.Window#configureShell(org.eclipse.swt.widgets.Shell)
*/
@Override
protected void configureShell(Shell newShell) {
super.configureShell(newShell);
switch (fMode) {
case SEARCH_LOCATION:
newShell.setText(Messages.LocationControl_CHOOSE_LOCATION);
break;
case SELECT_BIN:
newShell.setText(Messages.LocationControl_CHOOSE_BINS);
break;
}
}
/*
* @see org.eclipse.jface.dialogs.Dialog#initializeBounds()
*/
@Override
protected void initializeBounds() {
super.initializeBounds();
Point bestSize = getShell().computeSize(convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH), SWT.DEFAULT);
getShell().setSize(bestSize);
LayoutUtils.positionShell(getShell());
}
}
/**
* @param parent
* @param style
*/
public LocationControl(Composite parent, int style) {
this(parent, style, Mode.SEARCH_LOCATION);
}
/**
* @param parent
* @param style
* @param mode
*/
public LocationControl(Composite parent, int style, Mode mode) {
super(parent, style);
fMode = mode;
initComponents();
}
/**
* @return the selected locations
*/
public Long[][] getSelection() {
return fSelection != null ? ModelUtils.toPrimitive(fSelection) : null;
}
/**
* @param selection
*/
public void select(Long[][] selection) {
fSelection = CoreUtils.toEntities(selection);
fConditionLabel.setText(getLabel(fSelection));
}
/**
* @return <code>true</code> if the location was modified by the user and
* <code>false</code> otherwise.
*/
public boolean isModified() {
return fModified;
}
private void initComponents() {
/* Apply Gridlayout */
setLayout(LayoutUtils.createGridLayout(1, 5, 1));
fConditionLabel = new Link(this, SWT.NONE);
fConditionLabel.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, true));
fConditionLabel.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
IFolderChild selectedChild = null;
if (e.text != null && e.text.length() > 0)
selectedChild = fSelection.get(Integer.valueOf(e.text));
onChangeCondition(selectedChild);
}
});
fConditionLabel.setText(getLabel(fSelection));
}
private void onChangeCondition(IFolderChild selectedChild) {
FolderChildChooserDialog dialog = new FolderChildChooserDialog(getShell(), selectedChild, fSelection);
if (dialog.open() == IDialogConstants.OK_ID) {
List<IFolderChild> checkedElements = dialog.getCheckedElements();
fSelection = checkedElements;
fConditionLabel.setText(getLabel(fSelection));
notifyListeners(SWT.Modify, new Event());
/* Link might require more space now */
getShell().layout(true, true);
}
}
/**
* @return the label to show when no location is selected.
*/
protected String getDefaultLabel() {
if (fMode == Mode.SELECT_BIN)
return Messages.LocationControl_CHOOSE_BINS_LABEL;
return Messages.LocationControl_CHOOSE_LOCATION_LABEL;
}
private String getLabel(List<IFolderChild> entities) {
if (entities == null || entities.size() == 0) {
return "<a href=\"\">" + getDefaultLabel() + "</a>"; //$NON-NLS-1$ //$NON-NLS-2$
}
StringBuilder strB = new StringBuilder();
for (int i = 0; i < entities.size(); i++) {
strB.append("<a href=\"" + i + "\">").append(entities.get(i).getName()).append("</a>").append(", "); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
}
if (strB.length() > 0)
strB.delete(strB.length() - 2, strB.length());
return strB.toString();
}
/**
* @return a {@link ISearchCondition} from the selection of the control or
* <code>null</code> if none.
*/
public ISearchCondition toScopeCondition() {
ISearchCondition condition = null;
Long[][] selection = getSelection();
if (selection != null) {
IModelFactory factory = Owl.getModelFactory();
ISearchField field = factory.createSearchField(INews.LOCATION, INews.class.getName());
condition = factory.createSearchCondition(field, SearchSpecifier.SCOPE, selection);
}
return condition;
}
}