ExecuteCommandViewImpl.java

/*******************************************************************************
 * Copyright (c) 2012-2017 Codenvy, S.A.
 * 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:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.eclipse.che.ide.command.toolbar.commands;

import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Widget;
import com.google.inject.Inject;
import com.google.inject.Singleton;

import org.eclipse.che.commons.annotation.Nullable;
import org.eclipse.che.ide.api.command.CommandGoal;
import org.eclipse.che.ide.api.command.CommandImpl;
import org.eclipse.che.ide.api.keybinding.KeyBuilder;
import org.eclipse.che.ide.command.goal.DebugGoal;
import org.eclipse.che.ide.command.goal.RunGoal;
import org.eclipse.che.ide.command.toolbar.commands.button.ExecuteCommandButton;
import org.eclipse.che.ide.command.toolbar.commands.button.ExecuteCommandButtonFactory;
import org.eclipse.che.ide.command.toolbar.commands.button.ExecuteCommandButtonItemsProvider;
import org.eclipse.che.ide.ui.menubutton.MenuButton;
import org.eclipse.che.ide.util.input.CharCodeWithModifiers;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

/**
 * Implementation of {@link ExecuteCommandView} uses {@link MenuButton}s
 * for displaying commands grouped by goals.
 * Allows to choose command from the {@link MenuButton}'s dropdown menu.
 */
@Singleton
public class ExecuteCommandViewImpl implements ExecuteCommandView {

    /** Stores created buttons by goals. */
    private final Map<String, ExecuteCommandButton> goalButtons;
    private final FlowPanel                         buttonsPanel;

    private final ExecuteCommandButtonFactory buttonFactory;
    private final RunGoal                     runGoal;
    private final DebugGoal                   debugGoal;

    private ActionDelegate delegate;

    @Inject
    public ExecuteCommandViewImpl(ExecuteCommandButtonFactory buttonFactory, RunGoal runGoal, DebugGoal debugGoal) {
        this.buttonFactory = buttonFactory;
        this.runGoal = runGoal;
        this.debugGoal = debugGoal;

        goalButtons = new HashMap<>();
        buttonsPanel = new FlowPanel();
    }

    @Override
    public void setDelegate(ActionDelegate delegate) {
        this.delegate = delegate;
    }

    @Override
    public Widget asWidget() {
        return buttonsPanel;
    }

    @Override
    public void setGoals(Set<CommandGoal> goals) {
        goals.forEach(this::createButton);
    }

    /** Creates {@link ExecuteCommandButton} for the given goal and adds button to the panel. */
    private void createButton(CommandGoal goal) {
        ExecuteCommandButton button = buttonFactory.newButton(goal, delegate, getKeyBinding(goal));
        goalButtons.put(goal.getId(), button);

        button.updateTooltip();

        buttonsPanel.add(button);
    }

    @Override
    public void addCommand(CommandImpl command) {
        final ExecuteCommandButton button = goalButtons.get(command.getGoal());

        if (button == null) {
            return;
        }

        ExecuteCommandButtonItemsProvider itemsProvider = button.getItemsProvider();
        itemsProvider.addCommand(command);

        button.updateTooltip();
    }

    @Override
    public void removeCommand(CommandImpl command) {
        final ExecuteCommandButton button = goalButtons.get(command.getGoal());

        if (button == null) {
            return;
        }

        ExecuteCommandButtonItemsProvider itemsProvider = button.getItemsProvider();
        itemsProvider.removeCommand(command);

        button.updateTooltip();
    }

    @Nullable
    private CharCodeWithModifiers getKeyBinding(CommandGoal goal) {
        if (goal.equals(runGoal)) {
            return new KeyBuilder().alt().charCode('r').build();
        } else if (goal.equals(debugGoal)) {
            return new KeyBuilder().alt().charCode('d').build();
        }

        return null;
    }
}