org.eclipse.lsp4e.operations.symbols.LSPSymbolInFileDialog.java Source code

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Here is the source code for org.eclipse.lsp4e.operations.symbols.LSPSymbolInFileDialog.java

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/*******************************************************************************
 * Copyright (c) 2016 Rogue Wave Software Inc. and others.
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *  Micha Niewrza (Rogue Wave Software Inc.) - initial implementation
 *******************************************************************************/
package org.eclipse.lsp4e.operations.symbols;

import java.util.List;

import org.eclipse.core.filebuffers.FileBuffers;
import org.eclipse.core.filebuffers.LocationKind;
import org.eclipse.core.resources.IResource;
import org.eclipse.jface.dialogs.PopupDialog;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.lsp4e.LSPEclipseUtils;
import org.eclipse.lsp4e.LanguageServerPlugin;
import org.eclipse.lsp4e.outline.SymbolsLabelProvider;
import org.eclipse.lsp4j.Location;
import org.eclipse.lsp4j.SymbolInformation;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.FilteredTree;
import org.eclipse.ui.dialogs.PatternFilter;
import org.eclipse.ui.texteditor.ITextEditor;

public class LSPSymbolInFileDialog extends PopupDialog {

    private static class SymbolsContentProvider extends ArrayContentProvider implements ITreeContentProvider {

        @Override
        public Object[] getChildren(Object parentElement) {
            return null;
        }

        @Override
        public Object getParent(Object element) {
            return null;
        }

        @Override
        public boolean hasChildren(Object element) {
            return false;
        }
    }

    private ITextEditor fTextEditor;
    private List<? extends SymbolInformation> fSymbols;

    private FilteredTree fFilteredTree;

    public LSPSymbolInFileDialog(Shell parentShell, ITextEditor textEditor,
            List<? extends SymbolInformation> symbols) {
        super(parentShell, PopupDialog.INFOPOPUP_SHELLSTYLE, true, true, true, false, false, null, null);
        this.fTextEditor = textEditor;
        this.fSymbols = symbols;
        create();

    }

    @Override
    protected Control createDialogArea(Composite parent) {
        fFilteredTree = new FilteredTree(parent, SWT.BORDER, new PatternFilter(), true);
        TreeViewer viewer = fFilteredTree.getViewer();

        viewer.setContentProvider(new SymbolsContentProvider());
        viewer.setLabelProvider(new SymbolsLabelProvider());
        viewer.setUseHashlookup(true);
        viewer.addSelectionChangedListener(event -> {
            IStructuredSelection selection = (IStructuredSelection) event.getSelection();
            if (selection.isEmpty()) {
                return;
            }
            SymbolInformation symbolInformation = (SymbolInformation) selection.getFirstElement();
            Location location = symbolInformation.getLocation();

            IResource targetResource = LSPEclipseUtils.findResourceFor(location.getUri());
            if (targetResource == null) {
                return;
            }
            IDocument targetDocument = FileBuffers.getTextFileBufferManager()
                    .getTextFileBuffer(targetResource.getFullPath(), LocationKind.IFILE).getDocument();
            if (targetDocument != null) {
                try {
                    int offset = LSPEclipseUtils.toOffset(location.getRange().getStart(), targetDocument);
                    int endOffset = LSPEclipseUtils.toOffset(location.getRange().getEnd(), targetDocument);
                    fTextEditor.selectAndReveal(offset, endOffset - offset);
                } catch (BadLocationException e) {
                    LanguageServerPlugin.logError(e);
                }
            }
        });

        viewer.setInput(fSymbols);
        return fFilteredTree;
    }

    @Override
    protected void configureShell(Shell shell) {
        super.configureShell(shell);

        shell.setSize(280, 300);
        Control control = fTextEditor.getAdapter(Control.class);
        if (control != null) {
            shell.setLocation(
                    control.toDisplay(control.getBounds().width - shell.getSize().x, control.getLocation().y));
        }
    }

}