com.google.dart.tools.ui.callhierarchy.LocationViewer.java Source code

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Here is the source code for com.google.dart.tools.ui.callhierarchy.LocationViewer.java

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/*
 * Copyright (c) 2012, the Dart project authors.
 * 
 * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.dart.tools.ui.callhierarchy;

import com.google.dart.tools.ui.internal.callhierarchy.CallLocation;

import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IMenuListener;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ColumnLayoutData;
import org.eclipse.jface.viewers.ColumnPixelData;
import org.eclipse.jface.viewers.ColumnWeightData;
import org.eclipse.jface.viewers.TableLayout;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.dnd.Clipboard;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.FocusListener;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.IViewSite;
import org.eclipse.ui.IWorkbenchPartSite;
import org.eclipse.ui.actions.ActionFactory;

import java.util.ArrayList;

class LocationViewer extends TableViewer {

    /**
     * Creates the table control.
     * 
     * @param parent the parent composite
     * @return the table
     */
    private static Table createTable(Composite parent) {
        return new Table(parent, SWT.H_SCROLL | SWT.V_SCROLL | SWT.MULTI | SWT.FULL_SELECTION);
    }

    private final String columnHeaders[] = { CallHierarchyMessages.LocationViewer_ColumnIcon_header,
            CallHierarchyMessages.LocationViewer_ColumnLine_header,
            CallHierarchyMessages.LocationViewer_ColumnInfo_header };

    private ColumnLayoutData columnLayouts[] = { new ColumnPixelData(18, false, true), new ColumnWeightData(60),
            new ColumnWeightData(300) };

    LocationViewer(Composite parent) {
        super(createTable(parent));

        setContentProvider(new ArrayContentProvider());
        setLabelProvider(new LocationLabelProvider());
        setInput(new ArrayList<CallLocation>());

        createColumns();
    }

    void clearViewer() {
        setInput(""); //$NON-NLS-1$
    }

    /**
     * Attaches a context menu listener to the tree.
     * 
     * @param menuListener the menu listener
     * @param popupId the id of the popup
     * @param viewSite the part site
     */
    void initContextMenu(IMenuListener menuListener, String popupId, IWorkbenchPartSite viewSite) {
        MenuManager menuMgr = new MenuManager();
        menuMgr.setRemoveAllWhenShown(true);
        menuMgr.addMenuListener(menuListener);
        Menu menu = menuMgr.createContextMenu(getControl());
        getControl().setMenu(menu);
        viewSite.registerContextMenu(popupId, menuMgr, this);
    }

    /**
     * Initializes and returns the Copy action for the location viewer.
     * 
     * @param viewSite the view site
     * @param clipboard the clipboard
     * @return the copy action
     */
    LocationCopyAction initCopyAction(final IViewSite viewSite, final Clipboard clipboard) {
        final LocationCopyAction copyAction = new LocationCopyAction(viewSite, clipboard, this);

        getTable().addFocusListener(new FocusListener() {
            IAction fViewCopyHandler;

            @Override
            public void focusGained(FocusEvent e) {
                IActionBars actionBars = viewSite.getActionBars();
                fViewCopyHandler = actionBars.getGlobalActionHandler(ActionFactory.COPY.getId());
                actionBars.setGlobalActionHandler(ActionFactory.COPY.getId(), copyAction);
                actionBars.updateActionBars();
            }

            @Override
            public void focusLost(FocusEvent e) {
                if (fViewCopyHandler != null) {
                    IActionBars actionBars = viewSite.getActionBars();
                    actionBars.setGlobalActionHandler(ActionFactory.COPY.getId(), fViewCopyHandler);
                    actionBars.updateActionBars();
                    fViewCopyHandler = null;
                }
            }
        });

        return copyAction;
    }

    private void createColumns() {
        TableLayout layout = new TableLayout();
        getTable().setLayout(layout);
        getTable().setHeaderVisible(true);
        for (int i = 0; i < columnHeaders.length; i++) {
            layout.addColumnData(columnLayouts[i]);
            TableColumn tc = new TableColumn(getTable(), SWT.NONE, i);
            tc.setResizable(columnLayouts[i].resizable);
            tc.setText(columnHeaders[i]);
        }
    }
}