Java tutorial
/** * Copyright (c) 2013 Puppet Labs, Inc. and other contributors, as listed below. * 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.eclipse.org/legal/epl-v10.html * * Contributors: * 2010 itemis AG (http://www.itemis.eu) - initial API and implementation * Puppet Labs * */ package com.puppetlabs.geppetto.pp.dsl.ui.editor.findrefs; import java.util.Iterator; import org.eclipse.jface.action.IAction; import org.eclipse.jface.action.IToolBarManager; import org.eclipse.jface.util.OpenStrategy; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.OpenEvent; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.search.ui.IContextMenuConstants; import org.eclipse.search.ui.IQueryListener; import org.eclipse.search.ui.ISearchQuery; import org.eclipse.search.ui.ISearchResult; import org.eclipse.search.ui.ISearchResultPage; import org.eclipse.search.ui.ISearchResultViewPart; import org.eclipse.search.ui.NewSearchUI; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableItem; import org.eclipse.ui.IActionBars; import org.eclipse.ui.IMemento; import org.eclipse.ui.OpenAndLinkWithEditorHelper; import org.eclipse.ui.actions.ActionFactory; import org.eclipse.ui.part.IPageSite; import org.eclipse.ui.part.Page; import org.eclipse.ui.part.PageBook; import org.eclipse.xtext.resource.IReferenceDescription; import org.eclipse.xtext.resource.IResourceDescription; import org.eclipse.xtext.ui.editor.IURIEditorOpener; import com.google.inject.Inject; public class PPReferenceSearchViewPage extends Page implements ISearchResultPage { private String id; private ISearchResult searchResult; private PageBook pagebook; private Table busyLabel; private Composite control; private TreeViewer viewer; private ISearchResultViewPart part; private IAction showNextAction; private IAction showPreviousAction; private IAction expandAllAction; private IAction collapseAllAction; @Inject private ReferenceSearchResultContentProvider contentProvider; @Inject private ReferenceSearchResultLabelProvider labelProvider; @Inject private ReferenceSearchViewSorter sorter; @Inject private IURIEditorOpener uriEditorOpener; private boolean isBusyShowing; private IQueryListener queryListener; public PPReferenceSearchViewPage() { showPreviousAction = new ReferenceSearchViewPageActions.ShowPrevious(this); showNextAction = new ReferenceSearchViewPageActions.ShowNext(this); expandAllAction = new ReferenceSearchViewPageActions.ExpandAll(this); collapseAllAction = new ReferenceSearchViewPageActions.CollapseAll(this); } @Override public void createControl(Composite parent) { pagebook = new PageBook(parent, SWT.NULL); pagebook.setLayoutData(new GridData(GridData.FILL_BOTH)); busyLabel = new Table(pagebook, SWT.NONE); TableItem item = new TableItem(busyLabel, SWT.NONE); item.setText("Searching..."); busyLabel.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); control = new Composite(pagebook, SWT.NULL); control.setLayoutData(new GridData(GridData.FILL_BOTH)); control.setSize(100, 100); control.setLayout(new FillLayout()); viewer = new TreeViewer(control, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL); viewer.setContentProvider(contentProvider); viewer.setLabelProvider(labelProvider); viewer.setSorter(sorter); createOpenAndLinkWithEditorHandler(); IToolBarManager tbm = getSite().getActionBars().getToolBarManager(); fillToolbar(tbm); tbm.update(true); pagebook.showPage(control); isBusyShowing = false; queryListener = createQueryListener(); NewSearchUI.addQueryListener(queryListener); } protected OpenAndLinkWithEditorHelper createOpenAndLinkWithEditorHandler() { return new OpenAndLinkWithEditorHelper(viewer) { @Override protected void activate(ISelection selection) { final int currentMode = OpenStrategy.getOpenMethod(); try { OpenStrategy.setOpenMethod(OpenStrategy.DOUBLE_CLICK); handleOpen(new OpenEvent(viewer, selection)); } finally { OpenStrategy.setOpenMethod(currentMode); } } @Override protected void linkToEditor(ISelection selection) { // not supported by this part } @Override protected void open(ISelection selection, boolean activate) { handleOpen(new OpenEvent(viewer, selection)); } }; } protected IQueryListener createQueryListener() { return new IQueryListener() { public void queryAdded(ISearchQuery query) { showBusyLabel(false); } public void queryFinished(ISearchQuery query) { showBusyLabel(false); } public void queryRemoved(ISearchQuery query) { showBusyLabel(false); } public void queryStarting(ISearchQuery query) { showBusyLabel(true); } }; } @Override public void dispose() { NewSearchUI.removeQueryListener(queryListener); super.dispose(); } protected void fillToolbar(IToolBarManager tbm) { tbm.appendToGroup(IContextMenuConstants.GROUP_SHOW, showNextAction); tbm.appendToGroup(IContextMenuConstants.GROUP_SHOW, showPreviousAction); IActionBars actionBars = getSite().getActionBars(); if (actionBars != null) { actionBars.setGlobalActionHandler(ActionFactory.NEXT.getId(), showNextAction); actionBars.setGlobalActionHandler(ActionFactory.PREVIOUS.getId(), showPreviousAction); } tbm.appendToGroup(IContextMenuConstants.GROUP_VIEWER_SETUP, expandAllAction); tbm.appendToGroup(IContextMenuConstants.GROUP_VIEWER_SETUP, collapseAllAction); } @Override public Control getControl() { return pagebook; } public String getID() { return id; } public String getLabel() { return searchResult == null ? "" : searchResult.getLabel(); } public Object getUIState() { return viewer.getSelection(); } public TreeViewer getViewer() { return viewer; } protected void handleOpen(OpenEvent openEvent) { ISelection selection = openEvent.getSelection(); if (selection instanceof IStructuredSelection) { IStructuredSelection structuredSelection = (IStructuredSelection) selection; for (Iterator<?> i = structuredSelection.iterator(); i.hasNext();) { Object selectedObject = i.next(); if (selectedObject instanceof ReferenceSearchViewTreeNode) { ReferenceSearchViewTreeNode treeNode = (ReferenceSearchViewTreeNode) selectedObject; Object description = treeNode.getDescription(); // open resource or a reference (standard EReference, or the PP way). if (description instanceof IReferenceDescription) { IReferenceDescription referenceDescription = (IReferenceDescription) description; // Asssume that the PP way is always to pass null as EReference if (referenceDescription.getEReference() != null) { uriEditorOpener.open(referenceDescription.getSourceEObjectUri(), referenceDescription.getEReference(), referenceDescription.getIndexInList(), true); } else { // Do it the PP way. uriEditorOpener.open(referenceDescription.getSourceEObjectUri(), true); } } else if (description instanceof IResourceDescription) { uriEditorOpener.open(((IResourceDescription) description).getURI(), true); } } } } } @Override public void init(IPageSite pageSite) { super.init(pageSite); } public void restoreState(IMemento memento) { } public void saveState(IMemento memento) { } @Override public void setFocus() { Control control = viewer.getControl(); if (control != null && !control.isDisposed()) control.setFocus(); } public void setID(String id) { this.id = id; } public void setInput(ISearchResult newSearchResult, Object uiState) { synchronized (viewer) { this.searchResult = newSearchResult; if (searchResult != null) { viewer.setInput(newSearchResult); if (uiState instanceof ISelection) { viewer.setSelection((ISelection) uiState); } } part.updateLabel(); } } public void setViewPart(ISearchResultViewPart part) { this.part = part; } protected void showBusyLabel(final boolean shouldShowBusy) { if (shouldShowBusy != isBusyShowing) { Display.getDefault().asyncExec(new Runnable() { public void run() { if (shouldShowBusy) pagebook.showPage(busyLabel); else pagebook.showPage(control); } }); isBusyShowing = shouldShowBusy; } } }